Power distribution device for distribution board

Abstract

The provided is a power distribution device for a distribution board. The power distribution device distributes power to and connects a main circuit breaker, branch circuit breakers, an additional output terminal circuit breaker, and an additional output terminal circuit breaker, the power distribution device for a distribution board includes an upper housing, a lower housing installed on a floor, a connection module installed in a vertical direction at a side of the lower housing adjacent to the main circuit breaker, and the connection module includes a connection terminal, a connection member, a coupling member, an electrically conducting the fastening member, and a ring-shaped nut member.

Claims

1. A power distribution device for a distribution board, the power distribution device comprising: a housing including an upper housing configured to protect an upper portion of the power distribution device for the distribution board, and a lower housing configured to support and protect a lower portion of the power distribution device for the distribution board; a connection module disposed in a space in the housing and integrated with connection terminals to receive power of a main circuit breaker and a branch circuit breaker; and the connection terminal fastened to the connection module and configured to distribute power, wherein the connection module comprises: the connection terminal having first and second ends and a plate-shaped surface having a predetermined width and extending in a length direction between the first and second ends, the plate-shaped surface, between the first and second ends, having rivet coupling holes and connection holes; a connection member including first and second connection members coupled to cover the second end of the connection terminal in an upward/downward direction so that the second end has a connecting and electrically conducting connection hole, the first and second connection members having two opposite edges corresponding to each other, open ends having the connection holes, fastening holes, and coupling holes; coupling members configured to fix and penetrate the coupling holes of the connection member and the rivet coupling holes of the connection terminal; an electrically conducting fastening member fastened while penetrating the connection hole of the second end and the upper and lower fastening holes and configured to allow the second end of the connection terminal to be inserted into the connection hole; and a ring-shaped nut member fixed to a fastening groove portion of the lower housing so that the electrically conducting fastening member is fastened and fixed to the ring-shaped nut member while penetrating the fastening holes and the connection hole.

2. A power distribution device for a distribution board, the power distribution device comprising: a housing including an upper housing configured to protect an upper portion of the power distribution device for the distribution board, and a lower housing configured to support and protect a lower portion of the power distribution device for the distribution board; a connection module disposed in a space in the housing and integrated with connection terminals to receive power of a main circuit breaker and a branch circuit breaker; the connection terminal fastened to the connection module and configured to distribute power; and a rotary cover configured to be rotated and opened when a second end of the connection terminal of the power distribution device for the distribution board is connected to a connection hole of another power distribution device for the distribution board in a state in which the housing is opened; wherein the rotary cover comprises: a first surface portion extending in a plate shape in a length direction; a second surface portion having a plate shape and connected in a ? shape to the first surface portion; ?-shaped rotation surface portions configured to cover two opposite surfaces of each of the first and second surface portions; and hinge shafts on which two opposite surfaces of the rotation surface portion are axially fixed to be rotatable, and wherein each of rotation surface portions of the lower housing comprises; a hinge shaft groove in which a stopping protrusion supports an opened or closed state of the rotary cover while moving upward or downward; and an angle fixing groove portion having first and second groove portions formed at two opposite sides in an upward/downward direction based on the hinge shaft groove.

3. The power distribution device of claim 1, comprising: a connection holder part comprising: male connection protruding portions having tip portions sharply formed on supports protruding from two opposite sides of a front end of the housing, the male connection protruding portions having end pieces installed side by side; and female connection groove portions recessed at two opposite sides of a rear end of the housing so as to be opened upward and coupled as projection portions of the male connection protruding portions inserted and attached into the female connection groove portions.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a coupled perspective view of an entire distribution board to which a power distribution device for a distribution board of the present invention is applied.

(2) FIG. 2 is an exploded perspective view of the entire distribution board to which the power distribution device for a distribution board of the present invention is applied.

(3) FIG. 3 is an exploded perspective view of the power distribution device for a distribution board of the present invention.

(4) FIG. 4 is a perspective view illustrating a connected state of the power distribution device for a distribution board of the present invention.

(5) FIG. 5A is an extracted perspective view of a connection module of the power distribution device for a distribution board of the present invention.

(6) FIG. 5B is an exploded perspective view of the connection module of the power distribution device for a distribution board of the present invention.

(7) FIG. 6A is a cross-sectional view of an installed state including the connection module of the power distribution device for a distribution board of the present invention.

(8) FIG. 6B is an extracted cross-sectional view of the connection module of the power distribution device for a distribution board of the present invention.

(9) FIG. 7 is a perspective view illustrating an application state according to an embodiment of a height adjustment support of the power distribution device for a distribution board of the present invention.

(10) FIG. 8A is a side view of a first application state according to the embodiment of the height adjustment support of the power distribution device for a distribution board of the present invention.

(11) FIG. 8B is a side view of a second application state of the embodiment of the height adjustment support of the power distribution device for a distribution board of the present invention when viewed in another direction.

(12) FIG. 9A is an exploded perspective view of a rotary cover according to an embodiment of the rotary cover of the power distribution device for a distribution board of the present invention.

(13) FIG. 9B is an exploded perspective view of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention when viewed in another direction.

(14) FIG. 10A is a cross-sectional side view illustrating a closed state and an opened state of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention.

(15) FIG. 10B is a cross-sectional side view illustrating the closed state and the opened state of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention when viewed in another direction.

(16) FIG. 11 is an exploded perspective view according to an embodiment of a connection portion safety cover of the power distribution device for a distribution board of the present invention.

(17) FIG. 12A is an extracted perspective view of the connection portion safety cover of the power distribution device for a distribution board of the present invention.

(18) FIG. 12B is a side view of the connection portion safety cover of the power distribution device for a distribution board of the present invention.

(19) FIG. 12C is a bottom perspective cross-sectional view of the connection portion safety cover of the power distribution device for a distribution board of the present invention.

(20) FIG. 12D is an installed cross-sectional view of the connection portion safety cover of the power distribution device for a distribution board of the present invention.

(21) FIG. 13 is a top plan view illustrating a housing alignment connection structure of the power distribution device for a distribution board of the present invention.

(22) FIG. 14A is a main part view illustrating a connected state of the housing alignment connection structure of the power distribution device for a distribution board of the present invention.

(23) FIG. 14B is an enlarged main part view illustrating a connected state of the housing alignment connection structure of the power distribution device for a distribution board of the present invention.

DESCRIPTION OF MAIN REFERENCE NUMERALS OF DRAWINGS

(24) 1: Power distribution device for distribution board 2: Main circuit breaker 2a: Busbar terminal for main circuit breaker 3: Branch circuit breaker 3a: Busbar terminal for branch circuit breaker 4: Additional circuit breaker 41: Busbar connection terminal 411: First output terminal 412: Second output terminal 100: Housing 101: Upper housing 103: Lower housing 103a: Fastening groove portion 10: Connection module 11: Connection terminal 111: First end 112: Second end 113: Connection hole 12: Connection member 121: First connection member 121a: Two opposite edges 122: Second connection member 122a: Two opposite edges 123: Fastening hole 124: Connection hole 124a, 124b: Open end 125: Coupling hole 13: Coupling member 14: Electrically conducting fastening member 141: Head portion 142: Stem portion 15: Ring-shaped nut member 20: Height adjustment support 201: First surface 202: Second surface 21, 23: First and second coupling grooves 22, 24: First and second coupling protrusions 30: Rotary cover 31: Rotation surface portion 32: Hinge shaft 32a: Sound generation protrusion 33: Stopping protrusion 34: First surface portion 35: Second surface portion 37: Hinge shaft groove 38: Slip recessed portion 39: Angle fixing groove portion 391: First groove 392: Second groove 111: First end 112: Second end 112a: Inclined surface 112b: Tip surface 112c: Curved portion 113: Contact connection hole 114: Coupling rivet hole 50: Safety cover 51: Front cover portion 52: Upper cover portion 53: Fastening hole cover portion 54: Seating hole portion 54a: Placement surface 60: Connection holder part 61: Female connection groove portion 61a: Projection portion 62: Male connection protrusion 62a: Tip portion 62b: End piece

Detailed Descriptions of Exemplary Embodiments

(25) Hereinafter, a power distribution device for a distribution board according to exemplary embodiments of the present invention will be described more specifically.

(26) A power distribution device 1 for a distribution board of the present invention is a power distribution device capable of supplying power of a connection terminal 2a for a main circuit breaker 2 stacked at an upper side to a connection terminal 3a for a branch circuit breaker 3 and busbar connection terminals 41 for an additional circuit breaker 4 in a horizontal direction. A connection module 10 included in the power distribution device for a distribution board will be described in Embodiment 1, a height adjustment support 20 included in the power distribution device for a distribution board will be described in Embodiment 2, a rotary cover 30 included in the power distribution device for a distribution board will be described in Embodiment 3, a safety cover 50 included in the power distribution device for a distribution board will be described in Embodiment 3, and a housing alignment connection structure included in the power distribution device for a distribution board will be described in Embodiment 5.

Embodiment 1

(27) The attached FIG. 1 is a coupled perspective view of an entire distribution board to which a power distribution device for a distribution board of the present invention is applied, FIG. 2 is an exploded perspective view of the entire distribution board to which the power distribution device for a distribution board of the present invention is applied, FIG. 3 is an exploded perspective view of the power distribution device for a distribution board of the present invention, FIG. 4 is a perspective view illustrating a connected state of the power distribution device for a distribution board of the present invention, FIG. 5A is an extracted perspective view of a connection module of the power distribution device for a distribution board of the present invention, FIG. 5B is an exploded perspective view of the connection module of the power distribution device for a distribution board of the present invention, FIG. 6A is a cross-sectional view of an installed state including the connection module of the power distribution device for a distribution board of the present invention, and FIG. 6B is an extracted cross-sectional view of the connection module of the power distribution device for a distribution board of the present invention.

(28) According to the entire distribution board coupled perspective view and the distribution board exploded perspective view to which the power distribution device for a distribution board in FIGS. 1 and 2 is applied among the drawings, the power distribution device 1 for a distribution board of the present invention may be the power distribution device 1 for a distribution board that distributes power of the main circuit breaker 1 to the terminal 2a for the main circuit breaker 2, the terminals 3a for the branch circuit breaker 3, and the busbar connection terminal 41 of the additional circuit breaker 4 between the main circuit breaker 2, the branch circuit breaker 3, and the additional circuit breaker 4, as illustrated in FIGS. 1 and 2.

(29) The power distribution device 1 may include a housing 100 configured to cover an outer portion of the power distribution device, the connection module 10 disposed in a space in the housing 100 and connected to the busbar connection terminal 2a for the main circuit breaker 2 to receive power of the main circuit breaker 2, and the busbar connection terminal 41 stacked on and coupled to the connection module 10 connected to the busbar connection terminal 3a for the branch circuit breaker 3 and the busbar connection terminal 41 for the additional circuit breaker 4 to distribute the power of the main circuit breaker 2 to the busbar connection terminal 3a for the branch circuit breaker 3 and the busbar connection terminal 41 for the additional circuit breaker 4.

(30) As illustrated in FIGS. 1 and 2 among the drawings, the power distribution device for a distribution board of the present invention constitutes the power distribution device (a kind of busbar assembly 1) connected to the connection terminals 3a for the main circuit breaker 1 and configured to supply power of the main circuit breaker 1 to the connection terminals 2a of the branch circuit breakers 2, and the power distribution device electrically connects the connection module 10 and the busbar connection terminal 41 to distribute and supply power to the additional circuit breakers 4.

(31) The power distribution device 1 for a distribution board of the present invention, which is illustrated in FIGS. 3 and 4 among the attached drawings, may include the housing 100 including an upper housing 101 and a lower housing 103 installed on a floor.

(32) In addition, the power distribution device may include the connection module 10 installed in the vertical direction in the lower housing 103 in the housing 100 and installed at the side of the busbar terminal 2a for the main circuit breaker 2, the height adjustment support 20 selectively installed to protect first and second output terminals 411 and 412 of the busbar connection terminal 41 stacked on and coupled to the connection module 10 and configured to distribute power of the main circuit breaker 2 to the branch circuit breaker 3 and the additional circuit breaker 4, and the rotary cover 30 disposed at a side of a vertically exposed output terminal (a first end of the connection module) of the upper housing 101, the rotary cover 30 being opened upward at the time of being connected to the output terminal and configured to cover and protect the lateral side after the connection.

(33) The connection module 10 of the power distribution device 1 for a distribution board of the present invention illustrated in the attached FIGS. 5A, 5B, and 5C may broadly include a connection terminal 11, a connection member 12, coupling members 13, an electrically conducting fastening member 14, and a ring-shaped nut member 15.

(34) As illustrated in FIG. 5B, the connection terminal 11 has a first end 111 formed at any one of the two opposite ends, and a second end 112 formed at the other of the two opposite ends. A plate-shaped surface having a predetermined width may extend in a length direction between the first end 111 and the second end 112 of the connection terminal 11, and a plurality of coupling rivet holes 114 may be formed in the plate-shaped surface between the first end 111 and the second end 112.

(35) In particular, a contact connection hole 113 may be formed at a side of the second end 112. As illustrated in FIG. 5A, inclined surfaces 112a may be formed on upper and lower surfaces, and a tip surface 112b may be formed at an end between the inclined surfaces 112a. The second end 112 may have a smooth insertion structure having curved portions 112c that are easily inserted into a connection hole 124 to be described below.

(36) The connection member 12 includes a first connection member 121 coupled while covering the second end 112 of the connection terminal 11 from above to define the connection hole 124 to which the second end 112 of the connection terminal 11 is electrically connected, and a second connection member 122 coupled to support the connection terminal 11 from below to define the connection hole 124 to which the connection terminal 11 is electrically connected.

(37) The first and second connection members 121 and 122 respectively have two opposite edges 121a and 122a, fastening holes 123, and coupling holes 125 that respectively correspond to one another and are coupled to one another. Front and rear ends of each of the first and second connection members 121 and 122 may be defined as open ends 124a and 124b. The open ends 124a and 124b may define the connection hole 124 as the first and second connection members 121 and 122 are coupled in the upward/downward direction with the first end 111 of the connection terminal 11 interposed therebetween as the coupling members 13 are coupled while penetrating the coupling holes 125.

(38) A depth of the connection hole 124 may define 50% of an insertion/attachment length of the first end 111 and the second end 112 so that the second end 112 of the connection terminal 11 is inserted and attached.

(39) The electrically conducting fastening member 14 penetrates the fastening holes 123 of the connection member 12 and the fastening hole 113 of the first end 111 of the connection terminal 11 and is fixedly installed by the ring-shaped nut member 15 embedded and installed in a bottom housing 103.

(40) The electrically conducting fastening member 14 includes a stem portion 142 configured to penetrate the fastening holes 123 of the first and second connection members 121 and 122, and a head portion 141 supported by being caught by the fastening holes 123.

(41) The ring-shaped nut member 15 has a screw hole 151 to which the stem portion 142 of the fastening member 14 is screw-coupled, and an outer edge of the ring-shaped nut member 15 is defined as a quadrangular edge.

(42) The ring-shaped nut member 15 is embedded and fixed so that an upper portion thereof is exposed through a fastening groove portion 103a formed at a predetermined position along an outer peripheral edge of the lower housing 103.

(43) The electrically conducting fastening member 14 is fastened and coupled to the ring-shaped nut member 15 fixed to the fastening groove portion 103a as the stem portion 142 of the electrically conducting fastening member 14 is screw-coupled to the screw hole 151 of the ring-shaped nut member 15 in the fastening groove portion 103a while sequentially passing through the fastening hole 123 of the first connection member 121, the fastening hole 113 of the connection terminal 11, and the fastening hole 123 of the second connection member 122.

(44) As illustrated in the attached FIG. 6A, in the power distribution device 1 for a distribution board of the present invention, the connection terminal 11, which constitutes the connection module 10, is installed at a horizontal center portion between the upper housing 101 and the lower housing 103.

(45) The two connection terminals 11 illustrated in FIG. 6B are connected in the horizontal direction and maintain an electrically conducting state.

(46) The connection module 10 extracted from FIG. 6A is in the state in which the two connection terminals 11 are connected. The second end 112 of the connection terminal 11 at the right side based on the drawings is exposed toward the output terminal 3a of the branch circuit breaker 3 at the left side, the connection member 12 coupled to the second terminal 111 at the left side is positioned, and the second end 112 of another connection terminal 11 is inserted into the connection hole 124. The electrically conducting fastening member 14 penetrates the fastening holes 123 and the fastening hole 113 and is screw-coupled to the ring-shaped nut member 15 fixedly embedded in the lower housing 103. Further, the connection terminal 11 has a plurality of coupling rivet holes 114 that has not been described. The connection terminal 11 is coupled to connection terminals (no reference numerals) of the power distribution devices of one or more branch circuit breakers disposed in the vertical direction through the horizontal and vertical rivet coupling holes 114.

(47) Therefore, the connection module 10 is formed at a thickness center without being biased toward any one of one surface or the other surface, such that the power distribution device for a distribution board may be installed in a state in which one surface and the other surface are inverted at 180 degrees regardless of the position.

(48) This configuration may serve to divide and supply power in an intersection direction so that the power, which is supplied from the main branch circuit breaker 2 through the power distribution device 1 for a distribution board of the present invention, is supplied to the branch circuit breaker 3 and the additional circuit breaker 4.

(49) The configuration for connecting the two connection terminals 11 of the connection module 10 in the horizontal state may maintain the horizontality, thereby providing a simple and concise assembling structure in terms of overall assembling and installing processes in comparison with the burring forming structure of the connection terminals of the busbar assembly (power distribution device) known in the related art and the structure having the stepped portion formed toward the output side.

(50) The stable fixed state of the horizontal connection structure of the power distribution device 1 for a distribution board of the present invention may provide the coupling effect in order to stably distribute and provide power even in various outside flow situations.

(51) As illustrated in the exploded view of FIG. 4, the connection modules 10 and the branching-connection terminals 40 ensure spaces through which the connection modules 10 and the branching-connection terminals 40 may be extended to the upper side of the connection modules 10 of the present invention. However, in the connection terminals in the related art, the electrically conducting structures are formed in common so that the first end of the connection terminal is connected to the stepped portion of the second end. Alternatively, the terminal of any one of the first and second ends has the stepped portion, and the burring is formed downward, such that the horizontally connected state is maintained stably. The forming of the stepped portion or the forming of the burring for horizontally coupling the terminals eventually prevents instability of electric conduction during the connection but causes a problem in that spaces of the upper and lower connection rotary covers may be expanded.

(52) In addition to the above-mentioned improvement, as illustrated in FIG. 6B, the connection terminal 11 of the connection module 10 of the power distribution device 1 for a distribution board of the present invention may be maintained in a linear shape, thereby reducing a width of an induced current that may be induced in the terminal connected state of the complicated intersection coupling structure such as three-phase ground wires. When the thickness of the connection portion of the connection terminal in the related art increases, the expansion width of the induced current in the electrically conducting state increases, which may prevent an erroneous operation caused by a disturbing current to other terminals.

(53) The simple connecting and fastening of the connection hole 124 formed in the connection member 12 at the side of the first end 111 of the connection terminal 11 of the connection module 10 implements the terminal connection structure in the related art in which the connection terminals are placed and fastened on the upper and lower surfaces, such that the operation of binding the connection module 10 may be performed more conveniently and easily. Further, the screw-coupling of the stem portion 142 of the fastening member 14 may increase a contact force, thereby improving both the fixing force and the electrically conducting state.

(54) According to the power distribution device 1 for a distribution board according to the present invention configured as described above, the connection terminals 11 of the busbar connection module 10 are kept in a horizontally linear state, the connection terminals 11 may be conveniently disposed in the upper and lower rotary covers of the distribution board regardless of the position with respect to the upper and lower surfaces. Further, the connection terminal 11 may be screw-coupled to the ring-shaped nut member 15, which defines the quadrangular outer edge of the lower housing 103, thereby maintaining the stable coupling force.

(55) In addition, the second end 112 of the connection terminal 11 may be simply, quickly, and easily fastened to the connection hole 124 by screw-coupling, assembling, and releasing the fastening member 14, such that the operation of maintaining and replacing the connection module 10 may be efficiently performed.

(56) In addition, the fastening member 14 is screw-coupled to the ring-shaped nut member 15 of the lower housing 103 while penetrating the fastening holes 123 of the first and second connection members 121 and 122 and the connection hole 113 of the second end 112, such that the coupling force is increased. Therefore, it is possible to reduce electrical resistance and prevent the terminal of the main circuit breaker 2, the output terminals 31 and 32 of the branch circuit breaker 3, and the terminals of the additional circuit breaker 4 from being easily separated when external impact is applied.

(57) Meanwhile, in case that a material, such as copper clad aluminum, which is a new material and has low heat resistance, is used as a material of the terminal, it is possible to solve a problem in which the connection part is released by deformation of the material by heat generated by the connection of the output terminal 2a of the main circuit breaker 2 and the output terminal 41 of the additional circuit breaker 4.

(58) The output terminal of the power distribution device 1 for a distribution board of the present invention and the terminal of the additional circuit breaker 4 are securely coupled to prevent bolt releasing of the connection portion.

(59) The ring-shaped nut member 15 is fixed to the lower housing 103 by injection molding for fixing the nut member, and the nut is automatically coupled when the stem portion 142 of the fastening member 14 is fastened, such that the injection molding may solve the process problem in which a nut needs to be separately held or fixed from below, thereby improving the working efficiency.

Embodiment 2

(60) The present embodiment is based on the entire power distribution device for a distribution board of Embodiment 1, and a repeated description of some components will be omitted. The components required for the present embodiment will be described again with reference to the drawings of Embodiment 1.

(61) That is, the power distribution device 1 for a distribution board of the present invention includes the main circuit breaker 2 configured to receive power of the main circuit breaker, the branch circuit breakers 3 configured to distribute the power of the main circuit breaker 2 in another direction, the additional output terminal circuit breaker 3, and the power distribution device 1 for a distribution board that is connected to the branch circuit breaker 3 and the additional output terminal circuit breaker 4 and distributes the power of the main circuit breaker 1 to the branch circuit breaker 3 and the additional output terminal circuit breaker 4.

(62) The power distribution device 1 for a distribution board of the present invention may include the upper housing 101, the lower housing 103 installed on the floor, the connection module 10 installed in the vertical direction at the side of the main circuit breaker 2 in the lower housing 103, and the rotary cover 30 configured to be opened upward at the time of being connected to the output terminal at the side of the vertically exposed output terminal of the upper housing 101 (the first end of the connection module) and configured to cover and protect the lateral side after the connection.

(63) The connection module 10 of the power distribution device 1 for a distribution board of the present invention broadly includes the connection terminal 11, the connection member 12, the coupling members 13, the electrically conducting fastening member 14, and the ring-shaped nut member 15.

(64) The connection terminal 11 has the first end 111 formed at any one of the two opposite ends, and the second end 112 formed at the other of the two opposite ends. The plate-shaped surface having a predetermined width may extend in the length direction between the first end 111 and the second end 112 of the connection terminal 11, and the plurality of coupling rivet holes 114 may be formed in the plate-shaped surface between the first end 111 and the second end 112.

(65) The contact connection hole 113 may be formed at the side of the second end 112. The inclined surfaces 112a may be formed on the upper and lower surfaces, and the tip surface 112b may be formed at the end between the inclined surfaces 112a. The second end 112 may have the smooth insertion structure having the curved portions 112c that are easily inserted into the connection hole 124.

(66) The connection member 12 includes the first connection member 121 coupled while covering the second end 112 of the connection terminal 11 from above to define the connection hole 124 to which the second end 112 of the connection terminal 11 is electrically connected, and the second connection member 122 coupled to support the connection terminal 11 from below to define the connection hole 124 to which the connection terminal 11 is electrically connected.

(67) The first and second connection members 121 and 122 respectively have the two opposite edges 121a and 122a, the fastening holes 123, and the coupling holes 125 that respectively correspond to one another and are coupled to one another. The front and rear ends of each of the first and second connection members 121 and 122 may be defined as the open ends 124a and 124b. The open ends 124a and 124b may define the connection hole 124 as the first and second connection members 121 and 122 are coupled in the upward/downward direction with the first end 111 of the connection terminal 11 interposed therebetween as the coupling members 13 are coupled while penetrating the coupling holes 125.

(68) The depth of the connection hole 124 may define 50% of the insertion/attachment length of the first end 111 and the second end 112 so that the second end 112 of the connection terminal 11 is inserted and attached.

(69) The electrically conducting fastening member 14 penetrates the fastening holes 123 of the connection member 12 and the fastening hole 113 of the first end 111 of the connection terminal 11 and is fixedly installed by the ring-shaped nut member 15 embedded and installed in a bottom housing 103.

(70) The electrically conducting fastening member 14 includes the stem portion 142 configured to penetrate the fastening holes 123 of the first and second connection members 121 and 122, and the head portion 141 supported by being caught by the fastening holes 123.

(71) The ring-shaped nut member 15 has the screw hole 151 to which the stem portion 142 of the fastening member 14 is screw-coupled, and the outer edge of the ring-shaped nut member 15 is defined as a quadrangular edge.

(72) The ring-shaped nut member 15 is embedded and fixed so that the upper portion thereof is exposed through the fastening groove portion 103a formed at a predetermined position along the outer peripheral edge of the lower housing 103.

(73) The electrically conducting fastening member 14 is fastened and coupled to the ring-shaped nut member 15 fixed to the fastening groove portion 103a as the stem portion 142 of the electrically conducting fastening member 14 is screw-coupled to the screw hole 151 of the ring-shaped nut member 15 in the fastening groove portion 103a while sequentially passing through the fastening hole 123 of the first connection member 121, the fastening hole 113 of the connection terminal 11, and the fastening hole 123 of the second connection member 122.

(74) Hereinafter, the height adjustment support 20 will be specifically described with reference to the drawings.

(75) FIG. 7 is a perspective view illustrating an application state according to an embodiment of the height adjustment support of the power distribution device for a distribution board of the present invention, FIG. 8A is a side view of a first application state according to the embodiment of the height adjustment support of the power distribution device for a distribution board of the present invention, and FIG. 8B is a side view of a second application state of the embodiment of the height adjustment support of the power distribution device for a distribution board of the present invention when viewed in another direction.

(76) With reference to the drawings, the height adjustment support 20 of the power distribution device 1 for a distribution board of the present invention is a cover structure that may be interchangeably used to be matched with heights of the two output terminals having different heights by changing upper and lower positions so that the upper and lower positions are matched with heights of the first terminal 411 and the second terminal 32 of the branch circuit breaker 3. This structure improves the two height adjustment supports separately formed to be matched with the output terminals in the related art.

(77) That is, the height adjustment support 20 of the power distribution device for a distribution board of the present invention may have four first coupling grooves 21 and four first coupling protruding portions 22 alternately formed along a first surface 201 so as to be matched with the height of the first output terminal 411 of the branch circuit breaker 3. The number of first coupling grooves 21 and the number of first coupling protruding portions 22 may each be changed to four or more depending on the devices to be used.

(78) In addition, the height adjustment support 20 of the power distribution device for a distribution board of the present invention may have four second coupling grooves 23 and four second coupling protruding portions 24 alternately along a second surface 202 so as to be matched with the height of the second output terminal 412 of the branch circuit breaker 3. Of course, the number of second coupling grooves 23 and the number of second coupling protruding portions 24 may each be changed to five to six or more.

(79) As illustrated in FIGS. 7, 8A, and 8B, in the height adjustment support 20 the power distribution device for a distribution board of the present invention configured as described above, the second coupling grooves 23 and the second coupling protruding portions 24 of the second surface portion 202 of the height adjustment support 20 may be mounted to be matched with the height of the first output terminal 411 so as to be matched with the output terminals 411 and 412 of the branch circuit breaker 3, and the upper and lower positions of the height adjustment support 20 may be inverted so that the first coupling grooves 21 and the first coupling protruding portions 22 of the first surface portion 201 are positioned at the height of the second output terminal 412. The height adjustment support 20 of the power distribution device 1 for a distribution board of the present invention is the single rectangular body, the first coupling grooves 21 and the first coupling protruding portions 22 are formed on the first surface portion 201 that defines one horizontal surface (upper surface), and the second coupling grooves 23 and the second coupling protruding portions 24 are formed on the second surface portion 202 positioned on the other horizontal surface (lower surface), such that the height adjustment support has the improvement implemented by the single body while being identical in function to the two height adjustment supports that are manufactured and mounted to be matched with the terminal grooves of the first and second output terminals 31 and 32 in the related art.

Embodiment 3

(80) The present embodiment is based on the entire power distribution device for a distribution board of Embodiment 1, and a repeated description of some components will be omitted. The components required for the present embodiment 3 will be described again with reference to Embodiment 1.

(81) The power distribution device 1 for a distribution board of the present invention includes the main circuit breaker 2 configured to receive power of the main circuit breaker, the branch circuit breakers 3 configured to distribute the power of the main circuit breaker 2 in another direction, the additional output terminal circuit breaker 3, and the power distribution device 1 for a distribution board that is connected to the branch circuit breaker 3 and the additional output terminal circuit breaker 4 and distributes the power of the main circuit breaker 1 to the branch circuit breaker 3 and the additional output terminal circuit breaker 4.

(82) The power distribution device 1 for a distribution board of the present invention may include the upper housing 101, the lower housing 103 installed on the floor, the connection module 10 installed in the vertical direction at the side of the main circuit breaker 2 in the lower housing 103, and the rotary cover 30 configured to be opened upward at the time of being connected to the output terminal at the side of the vertically exposed output terminal of the upper housing 101 (the first end of the connection module) and configured to cover and protect the lateral side after the connection.

(83) The connection module 10 of the power distribution device 1 for a distribution board of the present invention broadly includes the connection terminal 11, the connection member 12, the coupling members 13, the electrically conducting fastening member 14, and the ring-shaped nut member 15.

(84) The connection terminal 11 has the first end 111 formed at any one of the two opposite ends, and the second end 112 formed at the other of the two opposite ends. The plate-shaped surface having a predetermined width may extend in the length direction between the first end 111 and the second end 112 of the connection terminal 11, and the plurality of coupling rivet holes 114 may be formed in the plate-shaped surface between the first end 111 and the second end 112.

(85) The contact connection hole 113 may be formed at the side of the second end 112. The inclined surfaces 112a may be formed on the upper and lower surfaces, and the tip surface 112b may be formed at the end between the inclined surfaces 112a. The second end 112 may have the smooth insertion structure having the curved portions 112c that are easily inserted into the connection hole 124.

(86) The connection member 12 includes the first connection member 121 coupled while covering the second end 112 of the connection terminal 11 from above to define the connection hole 124 to which the second end 112 of the connection terminal 11 is electrically connected, and the second connection member 122 coupled to support the connection terminal 11 from below to define the connection hole 124 to which the connection terminal 11 is electrically connected.

(87) The first and second connection members 121 and 122 respectively have the two opposite edges 121a and 122a, the fastening holes 123, and the coupling holes 125 that respectively correspond to one another and are coupled to one another. The front and rear ends of each of the first and second connection members 121 and 122 may be defined as the open ends 124a and 124b. The open ends 124a and 124b may define the connection hole 124 as the first and second connection members 121 and 122 are coupled in the upward/downward direction with the first end 111 of the connection terminal 11 interposed therebetween as the coupling members 13 are coupled while penetrating the coupling holes 125.

(88) The depth of the connection hole 124 may define 50% of the insertion/attachment length of the first end 111 and the second end 112 so that the second end 112 of the connection terminal 11 is inserted and attached.

(89) The electrically conducting fastening member 14 penetrates the fastening holes 123 of the connection member 12 and the fastening hole 113 of the first end 111 of the connection terminal 11 and is fixedly installed by the ring-shaped nut member 15 embedded and installed in a bottom housing 103.

(90) The electrically conducting fastening member 14 includes the stem portion 142 configured to penetrate the fastening holes 123 of the first and second connection members 121 and 122, and the head portion 141 supported by being caught by the fastening holes 123.

(91) The ring-shaped nut member 15 has the screw hole 151 to which the stem portion 142 of the fastening member 14 is screw-coupled, and the outer edge of the ring-shaped nut member 15 is defined as a quadrangular edge.

(92) The ring-shaped nut member 15 is embedded and fixed so that the upper portion thereof is exposed through the fastening groove portion 103a formed at a predetermined position along the outer peripheral edge of the lower housing 103.

(93) The electrically conducting fastening member 14 is fastened and coupled to the ring-shaped nut member 15 fixed to the fastening groove portion 103a as the stem portion 142 of the electrically conducting fastening member 14 is screw-coupled to the screw hole 151 of the ring-shaped nut member 15 in the fastening groove portion 103a while sequentially passing through the fastening hole 123 of the first connection member 121, the fastening hole 113 of the connection terminal 11, and the fastening hole 123 of the second connection member 122.

(94) Hereinafter, a rotation structure of the rotary cover 30 will be specifically described with reference to the drawings.

(95) Among the attached drawings, FIG. 9A is an exploded perspective view of a rotary cover according to an embodiment of the rotary cover of the power distribution device for a distribution board of the present invention, FIG. 9B is an exploded perspective view of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention when viewed in another direction, FIG. 10A is a cross-sectional side view illustrating a closed state and an opened state of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention, and FIG. 10B is a cross-sectional side view illustrating the closed state and the opened state of the rotary cover according to the embodiment of the rotary cover of the power distribution device for a distribution board of the present invention when viewed in another direction.

(96) Among the drawings, as illustrated in FIGS. 10A and 10B, the rotary cover 30 of the power distribution device 1 for a distribution board of the present invention is opened when the second end 112 of the connection terminal 11 of the second power distribution device 1 for a distribution board, which is intended to be connected in a state in which the upper housing 101 is opened, is connected to the connection hole 124 of the first power distribution device 1 for a distribution board. The rotary cover 30 may close and protect the connected state after the connection.

(97) As illustrated in FIGS. 9A and 9B, the rotary cover 30 includes a first surface portion 34 extending in a plate shape in the length direction, a plate-shaped second surface portion 35 connected in a ? shape to the first surface portion 34, and rotation surface portions 31 each formed by expanding a width of a ?-shaped cross-section of each of the two opposite sides of the rotary cover and configured to cover two opposite surfaces.

(98) An opened space for protecting the terminal of the upper housing 101 is formed inside the first surface portion 34, the second surface portion 35, and the rotation surface portions 31. Slip recessed portions 38 may be formed at two opposite inner sides of the upper housing 101, and the rotation surface portions 31 are seated in the slip recessed portions 38, cover the space, and rotate while slipping. A hinge shaft groove 37 and an angle fixing groove portion 39 are formed on the slip recessed portion 38.

(99) That is, the slip recessed portion 38 may have the angle fixing groove portion 39 configured to fix a rotation angle of the rotary cover 30 when a hinge shaft 32 rotates, and the hinge shaft groove 37 configured to axially support the hinge shaft 32. The angle fixing groove portion 39 may have a first groove portion 391 and a second groove portion 392 formed at two opposite sides based on the hinge shaft groove 37.

(100) The rotation surface portion 31 has a stopping protrusion 33 and is seated in the first groove portion 391 or the second groove portion 392 in order to fix an opened or closed state of the rotary cover 30 while slipping and rotating along the slip recessed portion 38.

(101) The hinge shaft groove 37 may be formed as a vertical groove so that the rotation surface portion 31 rotates while moving upward or downward in a vertical section.

(102) As illustrated in FIGS. 10A and 10b, the rotary cover 30 of the power distribution device 1 for a distribution board of the present invention is opened when the second end 112 formed on the connection terminal 11 of the second power distribution device 1 for a distribution board, between the two power distribution devices 1 for a distribution board that are connected when the rotary cover 30 is connected to the connection hole 124 of the first power distribution device 1 for a distribution board in the state in which the upper housing 101 is opened or only the rotary cover 30 is opened. The rotary cover 30 is closed and protects the connected state after the connection. The rotary cover 30 of the power distribution device 1 for a distribution board of the present invention is closed, as illustrated in FIG. 10A, when the second ends 112 of the connection terminal 11 of the power distribution device 1 for a distribution board are completely connected to the connection holes 124 in the state in which the rotary cover 30 is opened, as illustrated in FIG. 10B. The stopping protrusion 33 is seated in the second fixing groove portion 392.

(103) As described above, the rotary cover of the power distribution device for a distribution board of the present invention solves the problem with the protection cover means in the related art for protecting the exposed terminal opened at the upper portion of the upper housing. The rotary cover may be provided to constantly maintain an angle fixed state as the stopping protrusion 33 is seated in the first fixing groove portion 391 or the second fixing groove portion 392 of the angle fixing groove portion 39 in the opened state after the rotation at a predetermined angle.

Embodiment 4

(104) The present embodiment is based on the entire power distribution device 1 for a distribution board of Embodiment 1, and a repeated description of some components will be omitted. The components required for the present embodiment 4 will be described again with reference to the drawings in Embodiment 1.

(105) The connection portion safety cover 50 of the power distribution device 1 for a distribution board of the present invention may include the main circuit breaker 2 configured to receive power of the main circuit breaker, the branch circuit breakers 3 configured to distribute the power of the main circuit breaker 2 in another direction, the additional output terminal circuit breaker 3, and the power distribution device 1 for a distribution board that is connected to the branch circuit breaker 3 and the additional output terminal circuit breaker 4 and distributes the power of the main circuit breaker 1 to the branch circuit breaker 3 and the additional output terminal circuit breaker 4.

(106) The power distribution device 1 for a distribution board of the present invention may include the upper housing 101, the lower housing 103 installed on the floor, the connection module 10 installed in the vertical direction at the side of the main circuit breaker 2 in the lower housing 103, and the safety cover 50 configured to block an exposed portion of the output terminal at the side of the vertically exposed output terminal of the upper housing 101 (the first end of the connection module).

(107) The connection module 10 may broadly include the connection terminal 11, the connection member 12, the coupling members 13, the electrically conducting fastening member 14, and the ring-shaped nut member 15.

(108) The connection terminal 11 has the first end 111 formed at any one of the two opposite ends, and the second end 112 formed at the other of the two opposite ends. The plate-shaped surface having a predetermined width may extend in the length direction between the first end 111 and the second end 112 of the connection terminal 11, and the plurality of coupling rivet holes 114 may be formed in the plate-shaped surface between the first end 111 and the second end 112.

(109) The contact connection hole 113 may be formed at the side of the second end 112. The inclined surfaces 112a may be formed on the upper and lower surfaces, and the tip surface 112b may be formed at the end between the inclined surfaces 112a. The second end 112 may have the smooth insertion structure having the curved portions 112c that are easily inserted into the connection hole 124.

(110) The connection member 12 includes the first connection member 121 coupled while covering the second end 112 of the connection terminal 11 from above to define the connection hole 124 to which the second end 112 of the connection terminal 11 is electrically connected, and the second connection member 122 coupled to support the connection terminal 11 from below to define the connection hole 124 to which the connection terminal 11 is electrically connected.

(111) The first and second connection members 121 and 122 respectively have the two opposite edges 121a and 122a, the fastening holes 123, and the coupling holes 125 that respectively correspond to one another and are coupled to one another. The front and rear ends of each of the first and second connection members 121 and 122 may be defined as the open ends 124a and 124b. The open ends 124a and 124b may define the connection hole 124 as the first and second connection members 121 and 122 are coupled in the upward/downward direction with the first end 111 of the connection terminal 11 interposed therebetween as the coupling members 13 are coupled while penetrating the coupling holes 125.

(112) The depth of the connection hole 124 may define 50% of the insertion/attachment length of the first end 111 and the second end 112 so that the second end 112 of the connection terminal 11 is inserted and attached.

(113) The electrically conducting fastening member 14 penetrates the fastening holes 123 of the connection member 12 and the fastening hole 113 of the first end 111 of the connection terminal 11 and is fixedly installed by the ring-shaped nut member 15 embedded and installed in a bottom housing 103.

(114) The electrically conducting fastening member 14 includes the stem portion 142 configured to penetrate the fastening holes 123 of the first and second connection members 121 and 122, and the head portion 141 supported by being caught by the fastening holes 123.

(115) The ring-shaped nut member 15 has the screw hole 151 to which the stem portion 142 of the fastening member 14 is screw-coupled, and the outer edge of the ring-shaped nut member 15 is defined as a quadrangular edge.

(116) The ring-shaped nut member 15 is embedded and fixed so that the upper portion thereof is exposed through the fastening groove portion 103a formed at a predetermined position along the outer peripheral edge of the lower housing 103.

(117) The electrically conducting fastening member 14 is fastened and coupled to the ring-shaped nut member 15 fixed to the fastening groove portion 103a as the stem portion 142 of the electrically conducting fastening member 14 is screw-coupled to the screw hole 151 of the ring-shaped nut member 15 in the fastening groove portion 103a while sequentially passing through the fastening hole 123 of the first connection member 121, the fastening hole 113 of the connection terminal 11, and the fastening hole 123 of the second connection member 122.

(118) Hereinafter, the safety cover 50 will be described specifically with respect to the drawings.

(119) That is, among the attached drawings, FIG. 11 is an exploded perspective view according to an embodiment of a connection portion safety cover of the power distribution device for a distribution board of the present invention, FIG. 12A is an extracted perspective view of the connection portion safety cover of the power distribution device for a distribution board of the present invention, FIG. 12B is a side view of the connection portion safety cover of the power distribution device for a distribution board of the present invention, FIG. 12C is a bottom perspective cross-sectional view of the connection portion safety cover of the power distribution device for a distribution board of the present invention, and FIG. 12D is an installed cross-sectional view of the connection portion safety cover of the power distribution device for a distribution board of the present invention.

(120) The connection portion safety cover of the power distribution device for a distribution board according to the embodiment of the present invention according to FIGS. 11, 12A, 12B, 12C, and 12D, among the drawings, includes the housing 1, the connection module 10, and the safety cover 50.

(121) The safety cover 50 may include a front cover portion 51, upper cover portions 52, and fastening hole cover portions 53.

(122) The front cover portion 51 is formed in a plate shape to simultaneously cover the plurality of connection holes 124 in the front surface.

(123) The upper cover portion 52 is bent at a right angle from the front cover portion 51 and protrudes in a fork shape while having seating hole portions 54 alternately formed in a plate-shaped surface. The seating hole portion 54 has placement surfaces 54a formed to be seated on a stepped placement portion 101a of the upper housing 101.

(124) Therefore, the upper cover portion 52 having the seating hole portions 54 formed alternately is formed in a fork shape and inserted and attached as the placement surface 54a is in close contact with and stably mounted on the stepped placement portion 101a at the front side of the upper housing 101.

(125) In particular, as illustrated in FIGS. 12C and 12D, because the fastening hole cover portions 53 protrude downward from the bottom surface of the front cover portion 52, the fastening hole cover portions 53 are safely tightly supported by the stepped placement portion 101a while penetrating the fastening holes 123 formed in the first and second connection members 121 and 122 of the connection module 10 when fastening hole cover portions 53 are inserted and attached into the stepped placement portion 101a.

(126) Although not illustrated, in case that the fastening member 14 is fastened to the fastening hole 123, the structure of the safety cover 50 may be implemented as the structure in which the fastening hole cover portion 53 disposed below the upper cover portion 52 is removed, and only a seating hole 53a is formed to be in close contact with the head portion 141 of the fastening member 14.

(127) Therefore, it is possible to prevent a short circuit accident caused by inadvertent contact with the conductive member, contact with the operator, and rainwater in the opened state of the distribution board caused by the exposed terminal having no connection between the housings that constitute the power distribution device for a distribution board.

Embodiment 5

(128) The present embodiment is based on the entire power distribution device 1 for a distribution board of Embodiment 1, and a repeated description of some components will be omitted. However, the components required for the present embodiment 5 will be described again with reference to the drawings in Embodiment 1.

(129) That is, the power distribution device 1 for a distribution board of the present invention may include the main circuit breaker 2 configured to receive power of the main circuit breaker, the branch circuit breakers 3 configured to distribute the power of the main circuit breaker 2 in another direction, the additional output terminal circuit breaker 3, and the power distribution device 1 for a distribution board that is connected to the branch circuit breaker 3 and the additional output terminal circuit breaker 4 and distributes the power of the main circuit breaker 1 to the branch circuit breaker 3 and the additional output terminal circuit breaker 4.

(130) The power distribution device 1 for a distribution board of the present invention may include the upper housing 101, the lower housing 103 installed on the floor, the connection module 10 installed in the vertical direction at the side of the main circuit breaker 2 in the lower housing 103, and the rotary cover 30 configured to be opened upward at the time of being connected to the output terminal at the side of the vertically exposed output terminal of the upper housing 101 (the first end of the connection module) and configured to cover and protect the lateral side after the connection.

(131) The connection module 10 of the power distribution device 1 for a distribution board of the present invention broadly may include the connection terminal 11, the connection member 12, the coupling members 13, the electrically conducting fastening member 14, and the ring-shaped nut member 15.

(132) The connection terminal 11 has the first end 111 formed at any one of the two opposite ends, and the second end 112 formed at the other of the two opposite ends. The plate-shaped surface having a predetermined width may extend in the length direction between the first end 111 and the second end 112 of the connection terminal 11, and the plurality of coupling rivet holes 114 may be formed in the plate-shaped surface between the first end 111 and the second end 112.

(133) The contact connection hole 113 may be formed at the side of the second end 112. The inclined surfaces 112a may be formed on the upper and lower surfaces, and the tip surface 112b may be formed at the end between the inclined surfaces 112a. The second end 112 may have the smooth insertion structure having the curved portions 112c that are easily inserted into the connection hole 124.

(134) The connection member 12 includes the first connection member 121 coupled while covering the second end 112 of the connection terminal 11 from above to define the connection hole 124 to which the second end 112 of the connection terminal 11 is electrically connected, and the second connection member 122 coupled to support the connection terminal 11 from below to define the connection hole 124 to which the connection terminal 11 is electrically connected.

(135) The first and second connection members 121 and 122 respectively have the two opposite edges 121a and 122a, the fastening holes 123, and the coupling holes 125 that respectively correspond to one another and are coupled to one another. The front and rear ends of each of the first and second connection members 121 and 122 may be defined as the open ends 124a and 124b. The open ends 124a and 124b may define the connection hole 124 as the first and second connection members 121 and 122 are coupled in the upward/downward direction with the first end 111 of the connection terminal 11 interposed therebetween as the coupling members 13 are coupled while penetrating the coupling holes 125.

(136) The depth of the connection hole 124 may define 50% of the insertion/attachment length of the first end 111 and the second end 112 so that the second end 112 of the connection terminal 11 is inserted and attached.

(137) The electrically conducting fastening member 14 penetrates the fastening holes 123 of the connection member 12 and the fastening hole 113 of the first end 111 of the connection terminal 11 and is fixedly installed by the ring-shaped nut member 15 embedded and installed in a bottom housing 103.

(138) The electrically conducting fastening member 14 includes the stem portion 142 configured to penetrate the fastening holes 123 of the first and second connection members 121 and 122, and the head portion 141 supported by being caught by the fastening holes 123.

(139) The ring-shaped nut member 15 has the screw hole 151 to which the stem portion 142 of the fastening member 14 is screw-coupled, and the outer edge of the ring-shaped nut member 15 is defined as a quadrangular edge.

(140) The ring-shaped nut member 15 is embedded and fixed so that the upper portion thereof is exposed through the fastening groove portion 103a formed at a predetermined position along the outer peripheral edge of the lower housing 103.

(141) The electrically conducting fastening member 14 is fastened and coupled to the ring-shaped nut member 15 fixed to the fastening groove portion 103a as the stem portion 142 of the electrically conducting fastening member 14 is screw-coupled to the screw hole 151 of the ring-shaped nut member 15 in the fastening groove portion 103a while sequentially passing through the fastening hole 123 of the first connection member 121, the fastening hole 113 of the connection terminal 11, and the fastening hole 123 of the second connection member 122.

(142) Hereinafter, a housing alignment connection structure of the power distribution device for a distribution board of the present invention will be described specifically with reference to the drawings.

(143) Among the attached drawings, FIG. 13 is a top plan view illustrating a housing alignment connection structure of the power distribution device for a distribution board of the present invention, FIG. 14A is a main part view illustrating a connected state of the housing alignment connection structure of the power distribution device for a distribution board of the present invention, and FIG. 14B is an enlarged main part view illustrating a connected state of the housing alignment connection structure of the power distribution device for a distribution board of the present invention.

(144) In the housing alignment connection structure of the power distribution device for a distribution board of the present invention according to the drawings, the connection holder part 60 may broadly include female connection groove portions 61 and male connection protruding portions 62.

(145) The male connection protruding portions 62 protrude from two opposite sides of the front end of the housing 1 and have tip portions 62a sharply formed on a connector 63 protruding from the front end of the housing 1. The tip portions 62a are resiliently formed and installed side by side at an interval (c).

(146) The female connection members 61 are recessed at two opposite sides of the rear end of the housing 1, and the male connection protruding portions 62 are inserted and attached into the female connection members 61, such that the housing 1 are vertically and horizontally aligned.

(147) The connection holder parts 60 of the present invention configured as described above may connect the plurality of housings 1 continuously in the vertical direction.

(148) As illustrated in FIG. 13, the implementation of the connection holder part 60 of the present invention provides an effect of appropriately aligning the vertically connected state of the housings 1.

(149) That is, as illustrated in FIG. 14A, the connected state of the two continuous housings 1 inside the branch housing 3 and the additional housing 4 is indicated by circular line A and specifically illustrated in FIG. 14B that is an enlarged view of circular line A.

(150) As illustrated in the drawings, when the tip portions 62a of the male connection protruding portions 62, which sharply protrude at the interval (c), are inserted into inlet portions of the female connection groove portions 61, the interval decreases, and the tip portions 62a are retracted inward, such that the insertion and attachment are performed. Further, the tip portions 62a are caught by inner projection portions 61a of the female connection groove portions 61 each formed in a groove shape recessed inward while being opened upward from the rear end of the housing 1. Alternatively, the tip portions 62a may be pushed and fitted into the female connection groove portions 61 opened from above to below the housing 1.

(151) During a separation process, two end pieces 62b of the male connection protruding portions 62 exposed to the upper surface of the housing 1 may be retracted inward and separated from the opened female connection groove portions 61.

(152) Meanwhile, the above-mentioned connection holder part 60 may be formed in a lateral surface of the housing 1 or a lateral surface of the branch housing 3, thereby implementing stable connection when the continuous connection is made for the alignment in a transverse direction that may be variously implemented. In the present embodiment, a description of specific application examples will be omitted.

(153) While the present invention has been described above with reference to the exemplary embodiments and the drawings, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention disclosed in the claims.