JPH09180824A - Shield structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a shield structure capable of easily performing connection between an electromagnetic shield member and a connector and grounding the electromagnetic shield member at the same time as wire connection and to improve workability for connection to the earth in the shield structure. SOLUTION: This shield structure is composed of a connector 31 having its conductivity and a cylinder-shaped main body part 33, a conductive sheet 57 covering a wire 53 over its full length, a stop member 37 tightened and fixed at the end part outer circumference of the main body part 33, and a mounted body 41 having its conductivity in which the connector 31 is fixed and connected to an earth 45. Here, the wire 53 is inserted through the main body part 33, and the end of the conductive sheet is covered over the tip end outer circumference of the main body part 33 and is tightened and secured by means of the stop member 37. The conductive sheet 57 is connected to the earth 45 through the connector 31 and the mounted body 41 by fixing to the mounted body 41 the connector 31 to which the conductive sheet 57 is secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure for an electric wire connected to an attached body through a connector, and more specifically, a member for electromagnetically shielding the electric wire and a ground.
The present invention relates to a conductive structure that can be easily connected via a connector.

[0002]

2. Description of the Related Art FIG. 7 is a view showing an example of processing a shielded electric wire used as a conventional low voltage electric wire for an automobile.
(A) is a perspective view showing a state in which a terminal is crimped to the unsealed shield braid, and (B) is a sectional view taken along the line aa of (A). The core portion of the shielded electric wire 1 is provided with, for example, two core wires 3, and the core wire 3 is formed by covering the conductor wire 5 with a core wire skin 7 made of an insulating material such as vinyl. The outer periphery of the core wire 3 is covered with a braided shield conductor (shield braid) 9, and the outer side thereof is a sheath made of an insulating material such as vinyl.
Covered by 11.

In order to connect such a shielded wire 1 to a body to be attached (other device, other component, etc.), the shield braid 9 is unwound, separated from the core wire 3 and twisted together, and the core wire outer skin 7 is cut off and exposed. A terminal (not shown) is pressed against the conductive wire 5. The core wire 3 has a connector 13 attached to the terminal, and the connector 1
When 3 is fitted, electricity is supplied to other parts. In the shield braid 9 separated from the core wire 3, the terminal 15 is pressure-bonded to the tip, the insulating tape is wound around the exposed portion (L-shaped portion in the drawing), and then the terminal 15 is screwed to the mounted body. Grounded.

FIG. 8 shows a conventional shield structure for a high-voltage electric wire for an automobile. (A) is a perspective view of the electric wire inserted into the shield body, and (B) is a sectional view taken along line bb of (A). In the shield structure of the high-voltage electric wire 21, a cylindrical shield body 23 is inserted around the high-voltage electric wire 21. Shield body 23
Is formed by plating 24 on the inner peripheral surface and the outer peripheral surface of the cylindrical body 23a made of a resin material. Two ground electric wires 25a and 25b are connected to the inner peripheral surface and the outer peripheral surface of the shield body 23, and these ground electric wires 25a and 25b are connected to the mounted body and grounded.

[0005]

As described above, the shield structure differs between low-voltage and high-voltage electric wires, but when connecting an electric wire to be electromagnetically shielded to an object to be attached, they are both separate from the electric wire. Shield braid 9 or ground wire 25
a and 25b must be connected. That is, when the shield wire is used, the core wire 3 and the shield braid 9 must be separated and the connector 13 and the terminal 15 must be attached by separate methods. In particular, when the shielded wire 1 is used, the branching portion of the core wire 3 and the shield braid 9 is wound with a tape a plurality of times, and then the separated shield braid 9 is wound up with a tape for protection and insulation. Will be needed. Further, the shielded wire 1 has poor workability due to the variation of the shield braid 9 even when the terminals 15 are crimped, and the work efficiency is very poor because each is a fine manual work. The present invention has been made in view of the above circumstances, and provides a shield structure in which the electromagnetic shield member and the connector can be easily connected, and moreover, the electromagnetic shield member can be grounded at the same time when the electric wire is connected to the earth in the shield structure. The purpose is to improve the connection workability of.

[0006]

In order to achieve the above object, the structure of the shield structure according to the present invention has a conductive connector having a cylindrical main body and a conductive material covering the electric wire over the entire length. A sheet, a locking member that is pressed and fixed to the outer periphery of the end of the main body, and an attached body that is electrically conductive and to which the connector is fixed and is connected to the ground, Inserting the conductive sheet into the main body portion, covering the end of the conductive sheet with the outer periphery of the end portion of the main body portion, pressing and fixing with the locking member, and fixing the connector having the conductive sheet fixed to the attached body. Then, the conductive sheet is connected to the ground through the connector and the attached body. Then, in the shield structure configured as described above, when the conductive sheet covering the electric wire is covered on the main body of the connector and the locking member is coupled, the conductive sheet is connected to the connector in a pressure contact state and fixed. Will be done. Then, at the same time when the connector is fixed to the attached body, the conductive sheet is connected to the ground through the connector and the attached body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the shield structure according to the present invention will be described in detail below with reference to the drawings.
1 is a sectional view of a shield structure according to the present invention, FIG. 2 is an external perspective view of the shield structure according to the present invention, FIG. 3 is an enlarged view showing a contact portion of a laminate sheet used in FIG.
1 is a sectional view taken along line d-d of FIG. 1, FIG. 5 is a perspective view showing an example of a locking member used in the shield structure of FIG. 1, and FIG. 6 is a perspective view showing a completed state of the locking member of FIG. . In the shield structure according to the present embodiment, the electric wire is connected to the attached body via the connector 31. The connector 31 includes a tubular main body 33 having both ends open, a flange-shaped fixing portion 35 formed at one end of the main body 33, and a locking member 37 provided on the outer periphery of the main body 33. To be done.

These parts of the connector 31 are integrally molded of synthetic resin, and the outer peripheral surface and the inner peripheral surface are electrically conductive by, for example, nickel plating. A fixing hole 39 is formed in the fixing portion 35, and a bolt 40 is inserted into the fixing hole 39. Connector 31
Means that the bolt 40 inserted through the fixing hole 39 has the attached body 41.
By being screwed into the female threaded portion 43, it is fixed to the attached body 41 via the fixing portion 35 (see FIG. 2).

The attached body 41 is made of metal, for example, and is grounded by a ground 45. When the attached body 41 is made of an insulating material, a plating layer (not shown) is formed on the contact surface with the fixing portion 35, and this plating layer is grounded. That is, the connector 3 fixed to the mounted body 41
1, the fixing portion 35 is fixed, and at the same time, the connection to the ground 45 is completed.

As shown in FIG. 3, a plurality of annular projections 47 (two in this example) are formed on the outer periphery of the main body 33 on the side opposite to the fixed portion 35. Therefore, in other words, the convex portion 47
A circumferential groove 49 is formed between the adjacent grooves. The electric wire 53 to which the terminal 51 is crimped is inserted into the main body 33. A packing member 55 is attached to the outer periphery of the electric wire 53, and the packing member 5
5 seals between the outer circumference of the electric wire 53 and the inner circumference of the main body 33 in a watertight state. A conductive sheet (laminate sheet) 57 is wound on the outer circumference of the electric wire 53 over the entire length, and a corrugated tube 59, which is a bellows-shaped protective tube, is inserted on the outer side thereof.

The laminate sheet 57 is formed of, for example, a laminated synthetic resin sheet which has been subjected to treatments such as metal foil adhesion, conductive resin coating, metal vapor deposition and the like. At least the surface of the laminate sheet 57 on the electric wire 53 side is a conductive surface. The electric wire 53 has an electromagnetic shielding effect obtained by the laminate sheet 57 wound around the entire length. The end of the laminate sheet 57 wound around the electric wire 53 is the convex portion 4 of the main body 33 described above.
7 and the circumferential groove 49 (see FIG. 3). Further, the end portion of the corrugated tube 59 inserted through the outer side of the laminate sheet 57 is brought into contact with the end portion of the main body portion 33 while sandwiching the laminate sheet 57.

A locking member 3 provided on the outer periphery of the main body 33
Reference numeral 7 denotes two half-arc-shaped holding portions 61 as shown in FIG.
a and 61b. The sandwiching portions 61a and 61b are connected to the body portion 33 via the hinge portion 63, respectively. Locking means 65 is provided at both ends of the sandwiching portions 61a and 61b.
a and 65b are provided, and two sandwiching portions 61a and 61b are provided.
Is rotated in the directions of arrow e and arrow f shown in FIG.
As shown in FIG. 6, it is connected to the cylindrical shape through 5b.

A plurality of locking projections 67 shown in FIG. 3 are provided on the inner circumference of the sandwiching portions 61a and 61b. Locking protrusion 67
When the sandwiching portions 61a and 61b are integrally combined, the convex portion 47 of the main body portion 33 and the concave portion 5 of the corrugated tube 59 are formed.
9a. Therefore, the clamping unit 61
When the corrugated tube 59 is joined to the corrugated tube 59, the corrugated tube 59 is fixed to the main body 33 of the connector 31 through the locking member 37, with the recess 59a being locked by the locking projection 67.

As described above, in this state, the laminate sheet 57 is in a state of being covered on the outer periphery of the main body portion 33, that is, the convex portion 47 and the peripheral groove 49. Clamping portion 61a,
A pressing protrusion 69 is formed on the inner circumference of the pressing protrusion 6b.
9 is inserted into the circumferential groove 49 when the holding portions 61a and 61b are joined. Therefore, the laminated sheet 57, which is covered over the convex portions 47, has the sandwiching portion 61.
When a and 61b are combined, they are pushed into the circumferential groove 49 while being pressed and bent by the pressing protrusion 69, and the convex portion 47,
It is sandwiched by the circumferential groove 49 and the pressing protrusion 69 (see FIGS. 3 and 4). As a result, the laminate sheet 57 is brought into pressure contact with the convex portion 47 and the circumferential groove 49 of the connector 31 to be electrically connected to the connector 31.

In the assembling procedure of the shield structure constructed as described above, first, the periphery of the electric wire 53 is covered with the laminate sheet 57, and the electric wire 53 is wound around the main body 33 of the connector 31.
By inserting a corrugated tube 59 as a protection tube on the outer side and connecting the sandwiching portions 61a and 61b of the locking member 37, the laminate sheet 57 is pressed and fixed to the main body portion 33 of the connector 31, and the corrugated tube 59 is fixed. It is fixed to the connector 31. By pressing the connector 31 in this state against the attached body 41 with the bolts 40, the laminated sheet 57 is attached to the connector 31 and the attached body 4
1 to the ground 45, and the assembling of the shield structure is completed.

In this shield structure, when the laminated sheet 57 covering the electric wire 53 is put on the main body 33 of the connector 31 and the locking member 37 is coupled, the laminated sheet 57 is connected to the connector 31 in a pressure contact state, At the same time, the corrugated tube 59 is also fixed to the connector 31. The connector 31 is attached to the attached body 4
At the same time as being fixed to 1, the laminate sheet 57 is connected to the ground 45 via the connector 31.

Further, in this shield structure, the main body 33
The laminated sheet 57 covered with the sheet is sandwiched in a bent state by the circumferential groove 49 and the pressing protrusion 69, and the external force in the pulling direction acting on the laminated sheet 57 is carried by the bent portion. That is, this bent portion forms a so-called strain relief structure and has a high tensile strength against an external force.

According to the above-mentioned shield structure, the integrally molded connector 31 is covered with the laminate sheet 57 covering the electric wire 53, and the locking member 3 provided on the connector 31 is covered.
By connecting 7 to each other, electrical connection between the laminate sheet 57 and the connector 31 and fixing of the corrugated tube 59, which is a protective tube, can be achieved at the same time. This eliminates the need to separate the core wire and the shield braid and provide a connector or a terminal by a separate method as in the conventional shield structure using a shielded wire, and the electromagnetic shield member (laminate sheet 57) and the connector 31 It is possible to easily connect to and to improve assembly workability.

Further, the connector 31 and the laminated sheet 5
7 is in a conductive state, and therefore has a conductive connector 3
If 1 is fixed to the attached body 41, the laminated sheet 57
Can be connected to the ground 45 via the connector 31, and the work of individually attaching the terminals crimped to the shield braid to a device or the like on the ground side as in the conventional structure can be omitted.

Further, according to this shield structure, the connection between the laminate sheet 57 and the connector 31 is ensured by the locking member 37.
It is extremely easy to perform only by connecting the peripheral groove 49 and the pressing protrusion 6 to the main body 33 and the holding portions 61a and 61b.
Since 9 is provided, a strain relief structure for sandwiching the laminate sheet 57 in a bent state can be formed, and the laminate sheet 57 and the connector 31 can be securely fixed.

In the above embodiment, the locking member 3 is used.
The case where 7 is integrally provided on the main body 33 of the connector 31 via the hinge 63 has been described as an example.
It may be provided separately from the main body 33.

[0022]

As described above in detail, according to the shield structure of the present invention, the main body of the connector is covered with the conductive sheet covering the electric wire, and the locking member is coupled to the conductive sheet. Since the connector is electrically connected, it is not necessary to connect the core wire and the shield braid to each other separately, as in the conventional shield structure using shielded wires, and only the conductive connector is fixed to the mounted body. The conductive sheet can then be connected to ground. As a result, the workability of connecting the ground in the shield structure can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a shield structure according to the present invention.

FIG. 2 is an external perspective view of a shield structure according to the present invention.

FIG. 3 is an enlarged view showing a contact portion of the laminated sheet used in FIG.

FIG. 4 is a sectional view taken along line d-d of FIG. 1.

5 is a perspective view showing an example of a locking member used in the shield structure of FIG. 1. FIG.

FIG. 6 is a perspective view showing a state in which the locking members of FIG. 5 are completely coupled.

FIG. 7 is a diagram showing a processing example of a shielded electric wire used as a conventional low-voltage electric wire for an automobile, in which (A) is a perspective view showing a state in which a terminal is crimped to an unsealed shield braid;
(B) shows the aa sectional view of (A).

8A and 8B show a conventional shield structure for a high-voltage electric wire for an automobile, in which FIG. 8A is a perspective view of an electric wire inserted through a shield body, and FIG. 8B is a sectional view taken along line bb of FIG.

[Explanation of symbols]

 31 Connector 33 Main Body 37 Locking Member 41 Attached Body 45 Ground 49 Circumferential Groove 53 Electric Wire 57 Conductive Sheet 59 Protective Tube 59a Recess 67 Locking Protrusion 69 Pressing Protrusion

Claims (3)

[Claims] 1. A connector having a conductive and tubular main body, a conductive sheet that covers the electric wire over the entire length, a locking member that is pressed and fixed to the outer periphery of the end of the main body, And a body to be attached to which the connector is fixed and which is connected to the ground, the electric wire being inserted into the main body portion, and the end of the conductive sheet being attached to the outer periphery of the end portion of the main body portion. By covering and pressing and fixing with the locking member, the conductive sheet is fixed to the attached body to connect the conductive sheet to the ground through the connector and the attached body. Shield structure characterized by that. 2. A peripheral groove is formed on an outer circumference of an end portion of the main body portion, and a pressing protrusion to be inserted into the peripheral groove is formed on an inner circumference of the locking member. It is characterized in that a part of the conductive sheet is pushed into the circumferential groove by the pressing protrusion and fixed in a bent shape by pressing the locking member from above the conductive sheet covered on the outer circumference of the end portion. The shield structure according to claim 1. 3. A protective tube having a concave portion on its outer periphery is inserted outside the conductive sheet covering the electric wire, the locking member is continuously provided to the main body portion, and is inserted into the concave portion of the protective tube. A locking projection is formed on the locking member, and the locking member is pressed to fix the conductive sheet to the main body portion, and at the same time, the locking projection is inserted into the recess to secure the protective tube to the locking member. The shield structure according to claim 1, wherein the shield structure is fixed to the connector via.