SHIELD WIRE GROUNDING DEVICE OF ELECTRIC EQUIPMENT

Abstract

Disclosed herein is a shield wire grounding device of electric equipment, including: an electric equipment wire electrically connected to the electric equipment, covered by a first sheath, and having an end portion exposed to the outside of the first sheath; a shield wire installed outside the first sheath, and covered by a second sheath; an insulating member covering the exposed portion of the electric equipment; and a grounding member covering the shield wire and the insulating member, electrically connected to the shield wire, and grounded to an electric equipment housing.

Claims

1. A shield wire grounding device of electric equipment, comprising: an electric equipment wire electrically connected to the electric equipment, covered by a first sheath, and having an end portion exposed to the outside of the first sheath; a shield wire installed outside the first sheath, and covered by a second sheath; an insulating member covering the exposed portion of the electric equipment wire; and a grounding member covering the shield wire and the insulating member, electrically connected to the shield wire, and grounded to an electric equipment housing.

2. The shield wire grounding device of claim 1, wherein the grounding member is integrated with the outsides of the shield wire and the insulating member through injection molding.

3. The shield wire grounding device of claim 1, wherein the shield wire has one end portion exposed to the outside of the second sheath, with a connection terminal installed at the exposed portion of the shield wire, and the connection terminal electrically connects the grounding member to the shield wire.

4. The shield wire grounding device of claim 3, wherein the connection terminal has a locking protrusion formed protrusively thereon.

5. The shield wire grounding device of claim 4, wherein the locking protrusion is formed in a direction perpendicular to the longitudinal direction of the electric equipment wire.

6. The shield wire grounding device of claim 1, wherein the insulating member has an end portion exposed to the outside of the grounding member.

7. The shield wire grounding device of claim 1, further comprising a connection terminal connected to the end portion of the electric equipment wire.

8. The shield wire grounding device of claim 7, wherein the connection terminal has a portion covered by the insulating member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0024] FIG. 1 is a cross-sectional view illustrating a shield wire grounding structure of electric equipment according to the related art;

[0025] FIG. 2 is a perspective view illustrating a shield wire grounding structure of electric equipment according to a first embodiment of the present invention;

[0026] FIG. 3 is a plan view illustrating the shield wire grounding structure of electric equipment in FIG. 2; and

[0027] FIG. 4 is a cross-sectional view illustrating the shield wire grounding structure of electric equipment in FIG. 2.

DESCRIPTION OF SPECIFIC EMBODIMENTS

[0028] In the accompanying drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience in description and clarity. Furthermore, the terms as used herein are defined by taking functions of the invention into account and can be changed according to the custom or intention of users or operators. Therefore, definition of the terms should be made according to the overall disclosures set forth herein. The embodiments of the present invention are only examples of components described in claims, and do not limit the scope of the present invention, and claims must be analyzed on the basis of the technical idea throughout the present specification.

[0029] FIG. 2 is a perspective view illustrating a shield wire grounding structure of electric equipment according to a first embodiment of the present invention, FIG. 3 is a plan view illustrating the shield wire grounding structure of electric equipment in FIG. 2, and FIG. 4 is a cross-sectional view illustrating the shield wire grounding structure of electric equipment in FIG. 2.

[0030] As illustrated in FIGS. 2 to 4, the shield wire grounding device of electric equipment according to the first embodiment of the present invention includes an electric equipment wire 110, a shield wire 120, an insulating member 130, and a grounding member 140. The electric equipment wire 110 is covered by a first sheath 111, and has an end portion of which the first sheath 111 is peeled off to electrically connect the end portion to the electric equipment. The shield wire 120 is installed on the outer circumference of the first sheath 111 covering the electric equipment wire 110, and serves to shield electromagnetic waves. The insulating member 130 covers a part of the end portion of the electric equipment wire 110, which is exposed at the end of the first sheath 111 and electrically connected to the electric equipment, and insulates the exposed part of the electric equipment wire 110. The insulating member 130 is injection molded with the electric equipment wire 110. The grounding member 140 covers the insulating member 130, and is electrically connected to the shield wire 120 exposed to the outside of the first sheath 111. The grounding member 140 is injection molded with the insulating member 130 and the shield wire 120.

[0031] The electric equipment wire 110 serves to supply power to the electric equipment or transmit a signal to the electric equipment. One end portion of the electric equipment wire 110 is connected to the electric equipment, for example, a power supply unit or signal transmission unit, and the other end portion of the electric equipment wire 110 is connected to an external power supply. The electric equipment wire 110 is covered and protected by the separate first sheath 111, and the end portion of the electric equipment wire 110, which is connected to the electric equipment, is exposed to the outside with the first sheath 111 peeled off.

[0032] The shield wire 120 is disposed outside the first sheath 111 covering the electric equipment wire 110, and the outside of the shield wire 120 is covered and protected by a second sheath 121 made of an insulating material.

[0033] The insulating member 130 covers a part of the end portion of the electric equipment wire 110, which is exposed to the outside with the first sheath 111 peeled off, and insulates the exposed part of the electric equipment wire 110. The insulating member 130 is injection molded with the exposed end portion of the electric equipment wire 110.

[0034] That is, the exposed end portion of the electric equipment wire 110 is placed in a mold for forming the insulating member, and integrated with the electric equipment wire 110 when the insulating member 130 is injection molded.

[0035] Then, a separate connection terminal 112 is fixed to the end portion of the electric equipment wire 110, where the first sheath 111 is peeled off. The connection terminal 112 is connected to the electric equipment power supply unit or signal transmission unit installed in an electric equipment housing 101.

[0036] Therefore, the insulating member 130 covers a part of the connection terminal 112 while completely covering the end portion of the electric equipment wire 110 where the first sheath 111 is peeled off, and prevents the electric equipment wire 110 and the part of the connection terminal 112 from being in contact with the electric equipment housing 101. That is, the insulating member 130 insulates the electric equipment wire 110 from a conductive material such as the electric equipment housing 101.

[0037] The grounding member 140 covers the insulating member 130 and the shield wire 120 which is exposed to the outside with the second sheath 121 peeled off, and partially exposes an end portion of the insulating member 130, facing the electric equipment. That is, the grounding member 140 does not completely cover the insulating member 130 so as not to be in contact with the electric equipment wire 110 or the connection terminal 112, but exposes a part of the end portion of the insulating member 130 at the electric equipment.

[0038] The grounding member 140 includes a connection terminal 141 connected to the shield wire 120 which is exposed to the outside with the second sheath 121 peeled off. The connection terminal 141 is coupled to the shield wire 120, and made of a conductive material for connecting the grounding member 140 and the shield wire 120.

[0039] The connection terminal 141 has a locking protrusion 142 formed on the outside thereof, the locking protrusion 142 protruding in a direction perpendicular to the longitudinal direction of the electric equipment wire 110. The locking protrusion 142 serves to prevent the grounding member 140 from separating from the shield wire 120 in the longitudinal direction of the electric equipment wire 110, with the grounding member 140 formed with the shield wire 120 and the insulating member 130.

[0040] The grounding member 140 is formed by mixing a conductive powder or liquid material with a liquid plastic material during injection molding. Thus, the grounding member 140 can be electrically connected to the shield wire 120 and the electric equipment housing 101.

[0041] An application of the shield wire grounding structure of electric equipment according to the embodiment of the present invention will be briefly described.

[0042] First, the outermost portion of the second sheath 121 covering the shield wire 120 in an electric equipment cable having the shield wire 120 integrated therewith is peeled off by a predetermined length, in order to expose a part of the shield wire 120 to the outside.

[0043] Then, the shield wire 120 is cut to a length that is smaller than the electric equipment wire 110 and the first sheath 111 and larger than the second sheath 121.

[0044] Then, the first sheath 111 is peeled off to expose an end portion of the electric equipment wire 110. At this time, the first sheath 111 is peeled off so as to have a larger length than the shield wire 120.

[0045] After the second sheath 121 and the first sheath 111 are partially peeled off to expose the parts of the electric equipment wire 110 and the shield wire 120 to the outside, the connection terminal 141 is pressed and connected to the shield wire 120, and the connection terminal 112 is connected to the end portion of the electric equipment wire 110.

[0046] Then, a part of the connection terminal 112 and the exposed part of the electric equipment wire 110, to which the connection terminal 112 is connected, are placed in a mold for forming the insulating member, and injection molding liquid for the insulating member is injected to integrate the insulating member 130 with the part of the connection terminal 112 and the electric equipment wire 110.

[0047] Then, the electric equipment cable having the insulating member 130 fixed thereto is placed in a mold for forming the grounding member, and injection molding liquid for the grounding member is injected to integrate the grounding member 140 with the insulating member 130 and the connection terminal 141 coupled to the shield wire 120.

[0048] When the grounding member 140 is integrated with the insulating member 130, an end portion of the insulating member 130, facing the electric equipment, is exposed as illustrated in FIGS. 3 and 4. That is, the grounding member 140 is not in contact with the connection terminal 112 connected to the electric equipment wire 110.

[0049] When the insulating member 130 and the grounding member 140 are integrated with the electric equipment wire 110 and the shield wire 120 and constitute the electric equipment cable, the electric equipment cable is connected to the electric equipment. That is, the connection terminal 112 connected to the electric equipment wire 110 is connected to the power supply unit or signal transmission unit of the electric equipment installed in the electric equipment housing 101, and the grounding member 140 connected to the shield wire 120 is coupled to the electric equipment housing 101 while being in contact with the electric equipment housing 101.

[0050] In accordance with the embodiment of the present invention, the electric equipment wire and the insulating member are formed and integrated with each other and insulated from the electric equipment housing, and the grounding member made of a conductive plastic material integrated with the shield wire to the electric equipment housing. Thus, since the shield wire is not exposed to the outside, interference with other parts can be avoided to prevent a damage of the parts.

[0051] Furthermore, since the grounding member is formed of a conductive plastic material through injection molding, an operation of connecting the separate grounding member to the shield wire to connect the connection terminal installed on the electric equipment housing in the related art can be omitted, which makes it possible to improve the workability during an operation of connecting the electric equipment cable to the equipment.

[0052] While the present invention has been described with respect to the specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.