Opening-closing tool

Abstract

An object of the present invention is to provide an innovative opening-closing tool with extremely high product value. A first half-body 1 having a first operating part 1a on the distal end and a first handle part 1b on the proximal end and a second half-body 2 having a second operating part 2a on the distal end and a second handle part 2b on the proximal end have a cross-over pivot, and a biasing body 3 that abuts the second half-body 2 and provides an open bias on the two handle parts 1b, 2b is provided on the first half-body 1.

Claims

1. An opening-closing tool, in which a first half-body having a first operating part on a distal end and a first handle part on a proximal end and a second half-body having a second operating part on the distal end and a second handle part on the proximal end have a cross-over pivot, and a biasing body that abuts the second half-body and provides an open bias on the two handle parts is provided on the first half-body, the opening-closing tool characterized in being configured so that a recess part for latching a distal end part of the biasing body is provided on the second half-body, and, as a result of latching of the biasing body and the recess part, the two handle parts are biased open up to a predetermined open position, and, along therewith, opening of the two handle parts is prevented at this predetermined open position; being configured so that an unlatching part for allowing separation of the distal end part of the biasing body from the recess part is provided on the first half-body, and the second half-body is provided with a latching part for latching the distal end part of the biasing body when the distal end part of the biasing body is made to separate from the recess part by the unlatching part and the two handle parts have closed to a predetermined closed position, the two handle parts being kept closed by latching of the distal end part of the biasing body on the latching part; and being configured so that the biasing body has a configuration in which two plate bodies are linked with a base part, one of the plate bodies being in an attached state at the surface of the first half-body, and the distal end part of the plate body latching on, or separating from, the recess part, and the unlatching part has a configuration in which the one of the plate bodies is pressed from the back surface, and, due to this pressing by the unlatching part, the distal end part that is latched to the recess part is separated from the recess part in opposition to the elasticity of the plate body.

2. The opening-closing tool according to claim 1, characterized in being configured so that one of the plate bodies is latched and held on the latching part due to the elasticity of the one of the plate bodies.

3. The opening-closing tool according to claim 2, characterized in being configured so that a recess-like part is provided as the latching part on one side of the recess part on the second half-body.

4. The opening-closing tool according to claim 1, characterized in being configured so that a recess-like part is provided as the latching part on one side of the recess part on the second half-body.

5. The opening-closing tool according to any of claims 1 to 3, characterized in being configured so that the distal end part of the biasing body is provided so as to separate from the recess when the two handle parts are opened additionally from a predetermined open position with a predetermined force, an inclined part is provided on another side of the recess on the second half-body, and when the two handle parts are closed from a state in which the distal end part of the biasing body has separated from the recess, the distal end part of the biasing body slides on the inclined part, and the distal end part latches on the recess.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a plan view showing a working example;

(2) FIG. 2 is an illustrative view of the operation of the essential parts in the working example;

(3) FIG. 3 is an illustrative view of the operation of the essential parts in the working example;

(4) FIG. 4 is an oblique view showing the essential parts in the working example;

(5) FIG. 5 is an oblique view showing the essential parts in the working example;

(6) FIG. 6 is an explanatory view of the essential parts in the working example;

(7) FIG. 7 is an enlarged end view along the line A-A in FIG. 6;

(8) FIG. 8 is an illustrative view of the operation of the essential parts in the working example;

(9) FIG. 9 is an explanatory view of the essential parts in the working example;

(10) FIG. 10 is an explanatory view of the essential parts in the working example;

(11) FIG. 11 is a B-B sectional view of FIG. 10;

(12) FIG. 12 is an illustrative view of the operation of the essential parts in the working example;

(13) FIG. 13 is an illustrative view of the operation of the essential parts in the working example;

(14) FIG. 14 is an illustrative view of the operation of the essential parts in the working example;

(15) FIG. 15 is an illustrative view of the operation of the essential parts in the working example;

(16) FIG. 16 is an illustrative view of the operation of the essential parts in the working example.

BEST MODE FOR CARRYING OUT THE INVENTION

(17) Preferred embodiments of the present invention are described briefly below with reference to the diagrams while revealing the operation of the present invention.

(18) In the present invention, for example, when the two handle parts 1b, 2b (first handle part 1b and second handle part 2b) are closed by a gripping operation, the two operating parts 1a, 2a (first operating part 1a and second operating part 2a) close. When the force with which the two handle parts 1b, 2b are gripped is reduced, the two handle parts 1b, 2b open due to the open biasing of the biasing body 3, and the two operating parts 1a, 2a open along therewith.

(19) In addition, in the present invention, a recess part 4 on which the distal end part 3a of the biasing body 3 latches is provided on the second half-body 2, and with this configuration, the two handle parts 1b, 2b are biased open to a predetermined open position by the biasing body 3, and opening of the two handle parts 1b, 2b is stopped at this predetermined open position.

(20) Consequently, the two handle parts 1b, 2b are easy to use because opening more than necessary is not possible.

(21) In addition, with the present invention, when the distal end part 3a of the biasing body 3 is separated from the recess part 4 due to being pressed by a unlatching part 10 that is provided on the first half-body 1, and, in this state, the two handle parts 1b, 2b are closed to a predetermined closed position, the distal end part 3a of the biasing body 3 latches on the latching part 11 that has been provided on the second half-body 2, and closure of the two handle parts 1b, 2b is maintained due to latching of the distal end part 3a of the biasing body 3 on the latching part 11.

(22) In other words, e.g., when the closed state of the first operating part 1a and the second operating part 2a is to be maintained, this is achieved by utilizing the biasing body 3 to maintain the closed state of the two handle parts 1b, 2b. Therefore, a safe stored state is produced when the tool is not being used, and the structure can be described as being extremely efficient.

EXAMPLES

(23) Specific examples of the present invention are described below with reference to the drawings.

(24) In this example, a first half-body 1 having a first operating part 1a on the distal end and having a first handle part 1b on the proximal end, and a second half-body 2 having a second operating part 2a on the distal end and a second handle part 2b on the proximal end, have a cross-over pivot, and a biasing body 3 that abuts the second half-body 2 and open-biases the two handle parts 1b, 2b is provided on the first half-body 1.

(25) Specifically, a pair of long plate-form half-bodies 1, 2 (first half-body and second half-body) made from a suitable metal are provided as illustrated in FIG. 1, with the first half-body 1 and the second half-body 2 pivoting via a shaft member 6a at locations towards the distal ends. Handle parts 1b, 2b (first handle part and second handle part) that are covered with synthetic resin grips 7 are respectively provided at locations towards the proximal ends from the pivot part 6 of the first half-body 1 and the second half-body 2. On the other hand, operating parts 1a, 2a (first operating part and second operating part) are provided at locations towards the distal ends from the pivot part 6, and, in this example, blade parts are provided as the first operating part 1a and the second operating part 2a. In this example, blade parts with cutting blades are utilized at respectively opposing locations on the first half-body 1 and the second half-body 2 as the first operating part 1a and the second operating part 2a, but sandwiching parts whereby an object to be held is sandwiched with flat sandwiching surfaces, for example, may be suitably utilized, provided that the configuration can manifest the characteristics of the example.

(26) Passage holes 1c that pass through the bottom and top surfaces are provided in the first half-body 1 at two sites towards the proximal end from the location of the pivot with the second half-body 2 as shown in FIGS. 1 and 2. The passage holes 1c are attachment holes for attaching the biasing body 3 described below.

(27) A recess part 4 is provided in the second half-body at the inner edge part positioned towards the proximal end away from the location of the pivot with the first half-body 1, as shown in FIGS. 1 and 2. This recess part 4 is the location where the distal end part 3a of the biasing body 3 described below fits in and latches.

(28) The distal end part 3a of the biasing body 3 is circular as seen in plan view, and smoothly separates from the recess part 4 when the two handle parts 1b, 2b have been opened past the predetermined open position by a predetermined force.

(29) In addition, an inclined part 5 is provided on a side part of the recess part 4.

(30) This inclined part 5 is provided on the orbit along which the biasing body 3a of the biasing body 3 moves when the first handle part 1b and the second handle part 2b are opened as shown in FIGS. 3 and 4, inclined upward towards the recess part 4.

(31) In this example, the inclined part 5 is provided as a convex incline, but the inclined part also may be constituted by a flat surface.

(32) Additionally, in this example, the biasing body 3 that biases the first handle part 1b and the second handle part 2b in the open direction is provided on the first half-body 1.

(33) Specifically, the biasing body 3, as shown in FIGS. 1, 2, 3, and 4, is constituted by a plate-form spring that has the shape of a J as seen in plan view, which is punch-molded from a suitable metal sheet material. In this configuration, the two plate bodies 3A, 3B are linked by a base part, and one of the plate bodies 3A assumes an attached state on the surface of the first half-body 1 and is configured so as to have suitable elasticity in the direction perpendicular to the plate surface and the direction of the plate surface, from the base part to the distal end part 3a. The biasing body 3 may be any suitable body, provided that the configuration manifests the characteristics of this example, e.g., a material that has been molded with a mold.

(34) With the biasing body 3, protrusions 3 are provided on the base part and the distal end part of the plate body 3B as shown in FIG. 1, and when in an attached state on the first half-body 1, the protrusions 3 fit into the passage holes 1c provided on the first half-body 1, and the biasing body 3 is thereby provided on the first half-body 1 by being retained and latched.

(35) In addition, in this example, as a result of latching of the protrusions 3 in the passage holes 1c, a condition is produced in which the biasing body 3 is provisionally fixed onto the first half-body 1, but is completely fixed by insertion into a grip 7 in this state and molding. The symbols 1d, 2d denote holes that serve to retain the grip 7 through fitting of a part of the grip 7.

(36) The distal end part 3a of the biasing body 3 is provided so as to fit and latch in the recess part 4 of the second half-body 2 described above.

(37) Therefore, when the first handle part 1b and the second handle part 2b are closed, the biasing body 3 generates a return biasing force. The biasing action that arises due to deformation in the plate surface direction of the biasing body 3 when the first handle part 1b and the second handle part 2b have been closed is the open biasing action whereby the first handle part 1b and the second handle part 2b are biased in the open direction.

(38) In addition, the distal end part 3a of the biasing body 3 is formed in a circular shape as seen in plan view, so that separation from the recess part 4 and sliding over the inclined part 5 from the state of having separated from the recess part 4 can occur smoothly.

(39) In addition, the distal end part 3a of the biasing body 3 is formed with a bend in a state whereby it sticks up from the surface of the first half-body 1.

(40) As when the distal end part 3a of the biasing body 3 described above was made to have a circular shape as seen in plan view, this is done so that separation from the recess part 4 and sliding over the inclined part 5 from the state of having separated from the recess part 4 can occur smoothly.

(41) The biasing body 3 may also be made from synthetic resin.

(42) In addition, in this example, the unlatching part 10 that allows separation of the distal end part 3a from the recess part 4 when the biasing body 3 is pressed is provided on the first half-body 1.

(43) This unlatching part 10 has a configuration in which, as shown in FIGS. 4, 5, 6, 7, and 8, a hole 1e that passes through the top and bottom surfaces is provided on the first half-body 1 in a position towards the proximal end from the location of the pivot with the second half-body 2 and a rod-shaped member is provided in this hole 1e in a retained state so that it can freely advance and retract.

(44) Consequently, when the proximal end part 10b of the unlatching part 10 is pressed and operated to advance, the distal end part 10a of the unlatching part 10 acts against the return biasing of the biasing body 3 to press the biasing body 3, the biasing body 3 is pressed by the unlatching part 10 and made to rise up in a direction perpendicular to the plate surface, and the distal end part 3a moves in a direction perpendicular to the plate surface. The distal end part 3a of the biasing body 3 can separate from the recess part 4 due to pressing by the unlatching part 10. When the pressing-in operation on the unlatching part 10 is released, the unlatching part 10 retracts to its original position due to the return biasing of the biasing body 3.

(45) In this example, a recess-like part is provided on one side of the recess part 4 in the second half-body 2.

(46) This recess-like part is configured as a latching part 11 whereby the distal end part 3a of the biasing body 3 is latched when the distal end part 3a of the biasing body 3 separates from the recess part 4 as the result of pressing by the unlatching part 10, and, in this state, the two handle parts 1b, 2b are closed to a predetermined closed position, and pressing of the unlatching part 10 is released.

(47) Consequently, the distal end part 3a of the biasing body 3 falls into the latching part 11 and is latched, thereby maintaining closure of the two handle parts 1b, 2b (refer to FIGS. 9, 10, 11).

(48) In this example, based on the configuration described above, when the first handle part 1b and the second handle part 2b are gripped and operated to close, the first operating part 1a and the second operating part 2a close, and when the force of gripping the first handle part 1b and second handle part 2b is decreased, the first handle part 1b and the second handle part 2b open due to the open biasing of the biasing body 3, and the first operating part 1a and the second operating part 2a open along therewith.

(49) In addition, in this example, the recess part 4 that latches the distal end part 3a of the biasing body 3 is provided on the second half-body 2. Based on this configuration, the first handle part 1b and the second handle part 2b are urged open to a predetermined open position by the biasing body 3, and, along therewith, opening of the first handle part 1b and the second handle part 2b is prevented at this predetermined open position.

(50) Consequently, the first handle part 1b and the second handle part 2b do not open more than is necessary under normal conditions.

(51) In addition, in this example, when the first handle part 1b and the second handle part 2b are opened past the predetermined open position by a predetermined force, the distal end part of the biasing body 3 separates from the recess part 4 (FIGS. 3, 12, 13).

(52) Consequently, even when a strong force is applied to excessively open the first handle part 1b and the second handle part 2b, breakage of the biasing body 3 is prevented to as great an extent as possible by separation of the distal end part 3a of the biasing body 3 from the recess part 4.

(53) In addition, in this example, an inclined part 5 having a convex curved shape is provided on a side part of the recess part 4 in the second half-body 2, and when the first handle part 1b and the second handle part 2b are closed from the state in which the distal end part 3a of the biasing body 3 has separated from the recess part 4, the distal end part 3a of the biasing body 3 slides past the inclined part 5, and the distal end part 3a is thereby latched in the recess part 4 (refer to FIGS. 14 to 16).

(54) If the inclined part 5 were absent, then attempting to re-latch the distal end part 3a of the biasing body 3 that has separated from the recess part 4 again in the recess part 4 would involve, for example, a troublesome operation in which the first handle part 1b and the second handle part 2b are closed while supporting the biasing body 3. However, in this regard, simply by closing the first handle part 1b and the second handle part 2b, the distal end part 3a of the biasing body 3, in this example, is automatically latched in the recess part 4 as the result of sliding past the inclined part 5 along with the closing movements of the first handle part 1b and the second handle part 2b.

(55) Consequently, in order to prevent breakage of the biasing body 3, the distal end part 3a that has separated from the recess part 4 can readily and smoothly return to its original state (state in which the distal end part 3a is latched in the recess 4), thereby improving operability.

(56) In addition, in this example, when the distal end part 3a of the biasing body 3 separates from the recess part 4 as the result being pressed by the unlatching part 10 provided on the first half-body 1, the two handle parts 1b, 2b are closed to a predetermined closed position in this state, and pressing by the unlatching part 10 is then released, the distal end part 3a of the biasing body 3 will fall into the latching part 11 that is provided on the second half-body 2 and will be latched. Closure of the two handle parts 1b, 2b is maintained as a result of the distal end part 3a of the biasing body 3 falling and latching in the latching part 11 (refer to FIGS. 9, 10, 11).

(57) Thus, in accordance with this example, closing and opening operations can be carried out promptly by providing the biasing body 3. Moreover, because the recess part 4 for latching the distal end part 3a of the biasing body 3 is provided, excessive opening of the two handle parts 1b, 2b is prevented. Consequently, the tool is easy to use, and breakage of the biasing body 3 is prevented to as great an extent as possible, because the distal end part 3a of the biasing body 3 separates from the recess part 4. Moreover, because the inclined part 5 is provided on a side part of the recess part 4, the biasing body 3 that has separated from the recess part 4 readily and smoothly returns to its original state, resulting in favorable operability.

(58) In addition, in this example, a unlatching part 10 is provided on the first half-body 1 whereby the distal end part 3a is made to separate from the recess part 4 by pressing the biasing body 3, and a latching part 11 is provided on the second half-body 2 for latching the distal end part 3a of the biasing body 3 when the distal end part 3a is made to separate from the recess part 4 by pressing this unlatching part 10, the two handle parts 1b, 2b are closed to a closed position, and pressing of the unlatching part 10 is then released. A configuration is thereby produced whereby closure of the two handle parts 1b, 2b is maintained by latching of the distal end part 3a of the biasing body 3 in the latching part 11. As a result, for example, when a closed state is to be maintained with the first operating part 1a and second operating part 2a, this is achieved by utilizing this biasing body 3 to maintain the two handle parts 1b, 2b in a closed state. Thus, a safe stored state is obtained when the tool is not being used, and the structure can be described as being extremely efficient.

(59) In addition, in this example, the biasing body 3 is an elongated plate-form body that is in an attached state on the surface of the first half-body 1, and the distal end part 3a of the biasing body 3 is folded into a state whereby it protrudes from the surface of the first half-body 1. Therefore, providing the biasing body 3 does not impede operation, and moreover, separation from the recess part 4 and traversing up the inclined part 5 occur in an extremely favorable manner.

(60) In addition, in this example, the distal end part 3a of the biasing body 3 has a circular shape as seen in plan view, which also allows separation from the recess part 4 and traversing up the inclined part 5 to occur in an extremely favorable manner.

(61) Moreover, in this example, the protrusion 3 that is provided on the biasing body 3 latches in the passage hole 1c that is provided on the first half-body 1, and the biasing body 3 is thereby provided on the first half-body 1. Therefore, the superior actions and effects described above can be obtained using a simple structure.

(62) The present invention is not restricted by this example as specific configurations of the constituent elements can be suitably designed.