JP3231611B2 - Shield structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG. 7 is a view showing a processing example of a shielded electric wire conventionally used as a low-voltage wire for an automobile.
(A) is a perspective view of a state in which the terminal is crimped to the unraveled 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 conductive wire 5 with a core sheath 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 further outside is a sheath (outer skin) made of an insulating material such as vinyl.
11 covered.

In order to connect such a shielded wire 1 to an object to be mounted (other equipment, other parts, etc.), the shield braid 9 is unraveled, separated from the core wire 3 and twisted, and the core wire sheath 7 is cut off and exposed. A terminal (not shown) is pressed into contact with the conducting wire 5. The core wire 3 is provided with a connector 13 attached to the terminal.
When 3 is fitted, power is supplied to other components. In the shield braid 9 separated from the core wire 3, the terminal 15 is crimped to the tip and an insulating tape is wound around an exposed portion (L dimension portion in the figure), and then the terminal 15 is screw-fixed to the attached body. Grounded.

[0004] Fig. 8 shows a conventional shield structure of a high-voltage electric wire for automobiles, (A) is a perspective view of an electric wire inserted through a shield body, and (B) is a bb cross-sectional view of (A). In the shield structure of the high-voltage wire 21, a cylindrical shield 23 is inserted around the high-voltage wire 21. Shield body 23
Is formed by plating the inner and outer peripheral surfaces of a cylindrical body 23a made of a resin material. Two ground wires 25a and 25b are connected to the inner and outer circumferential surfaces of the shield body 23, and the ground wires 25a and 25b are connected to the attached body and grounded.

[0005]

As described above, the shield structure is different between the low-voltage and high-voltage electric wires, but when the electric wire to be subjected to the electromagnetic shielding is connected to the object to be mounted, each of them is separate from the electric wire. And shield braid 9 or ground wire 25
a and 25b must be connected. That is, when a 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 individual methods. In particular, when the shield wire 1 is used, the branch portion between the core wire 3 and the shield braid 9 is wound a plurality of times with tape, and then the separated shield braid 9 is wound with tape for protection and insulation. Required. In addition, the work efficiency of the shielded wire 1 was very poor due to the variation of the shield braid 9 in crimping of the terminal 15 and the work efficiency was very poor because each was a fine manual work. The present invention has been made in view of the above circumstances, and provides a shield structure capable of easily connecting an electromagnetic shield member and a connector, and further, grounding the electromagnetic shield member simultaneously with connection of an electric wire. It is intended to improve the connection workability.

[0006]

In order to achieve the above-mentioned object, a shield structure according to the present invention comprises a conductive connector having a cylindrical main body, and a conductive connector for covering an entire length of an electric wire. A circle consisting of a sheet and two clamping parts in a semicircular arc
A locking member coupled to a cylindrical shape and pressed and fixed to an outer periphery of an end of the main body, and an attached body having conductivity and the connector being fixed and connected to the ground, An electric wire is inserted through the main body, and the end of the conductive sheet is placed over the outer periphery of the end of the main body, pressed and fixed by the locking member, and the connector with the conductive sheet fixed is attached to the attached body. By fixing, the conductive sheet is connected to the ground via the connector and the attached body. In the shield structure configured as described above, the conductive sheet covering the electric wire is put on the main body of the connector, and when the locking member is coupled, the conductive sheet is connected to the connector in a press-contact state and fixed. Will be done. Then, at the same time that the connector is fixed to the mounted body, the conductive sheet is connected to the ground via the connector and the mounted body.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a shield structure according to the present invention will be described below in detail 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.
5 is a sectional view taken along line dd 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 cylindrical main body 33 having both ends opened, 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. Is done.

The connector 31 is formed by integrally molding these parts with a synthetic resin, and the outer peripheral surface and the inner peripheral surface have conductivity by being plated with, for example, nickel. A fixing hole 39 is formed in the fixing portion 35, and a bolt 40 is inserted into the fixing hole 39. Connector 31
The bolt 40 inserted into the fixing hole 39 is
Is fixed to the attached body 41 via the fixing portion 35 by screwing into the female screw portion 43 (see FIG. 2).

The mounting member 41 is made of, for example, metal 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 attached body 41
1 is such that the connection to the earth 45 is completed at the same time when the fixing portion 35 is fixed.

As shown in FIG. 3, a plurality of (two in this example) annular convex portions 47 are formed on the outer periphery of the main body portion 33 on the side opposite to the fixing portion 35. Therefore, in other words, the protrusion 47
A circumferential groove 49 is formed between them. An electric wire 53 to be crimped to the terminal 51 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 the space between the outer periphery of the electric wire 53 and the inner periphery of the main body 33 in a watertight state. As for the electric wire 53, a conductive sheet (laminated sheet) 57 is wound around the entire length, and a corrugated tube 59, which is a bellows-shaped protection tube, is inserted outside the conductive sheet (laminated sheet) 57.

The laminate sheet 57 is formed of a laminated synthetic resin sheet which has been subjected to processing such as bonding of a metal foil, coating of a conductive resin, and vapor deposition of a metal. At least the surface of the laminate sheet 57 on the side of the electric wire 53 is a surface having conductivity. The electric wire 53 can obtain an electromagnetic shielding effect by the laminated sheet 57 wound over the entire length. The end of the laminate sheet 57 wound around the electric wire 53 is connected to the protrusion 4 of the main body 33 described above.
7 and the circumferential groove 49 (see FIG. 3). Further, the end of the corrugated tube 59 inserted outside the laminate sheet 57 abuts on the end of the main body 33 with the laminate sheet 57 interposed therebetween.

The locking member 3 provided on the outer periphery of the main body 33
7, two holding portions 61 having a semicircular arc shape as shown in FIG.
a and 61b. The holding portions 61a and 61b are connected to the main body 33 via hinge portions 63, respectively. Locking means 65 are provided at both ends of the holding portions 61a and 61b.
a, 65b are provided, and two holding portions 61a, 61b are provided.
Are rotated through the hinge portions 63 in the directions of arrows e and f shown in FIG.
As shown in FIG. 6, it is connected to a cylindrical shape via 5b.

A plurality of locking projections 67 shown in FIG. 3 are provided on the inner periphery of the holding portions 61a and 61b. Locking projection 67
When the holding portions 61a and 61b are integrally joined, the projection 47 of the main body 33 and the recess 5 of the corrugated tube 59
9a. Therefore, the holding portion 61
By combining the a and 61b, the corrugated tube 59 is locked in the concave portion 59a by the locking protrusion 67 and is fixed to the main body 33 of the connector 31 via the locking member 37.

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

In the procedure for assembling the shield structure thus configured, first, the periphery of the electric wire 53 is covered with a laminate sheet 57 and wound around the main body 33 of the connector 31.
A corrugated tube 59 as a protective tube is inserted through the outside thereof, and the sandwiching portions 61a and 61b of the locking member 37 are joined to press and fix the laminated sheet 57 to the main body 33 of the connector 31 and to fix the corrugated tube 59. It is fixed to the connector 31. By pressing the connector 31 in this state against the attached body 41 with the bolt 40, the laminate sheet 57 is connected to the connector 31 and the attached body 4.
1 to the ground 45 to complete the assembly of the shield structure.

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

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

According to the above-described shield structure, the integrally formed 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 provided.
By connecting the joints 7, conduction 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 necessity of separating the core wire and the shield braid and providing a connector or a terminal in a separate method as in a conventional shield structure using a shield wire, so that the electromagnetic shield member (laminate sheet 57) and the connector 31 are not required. Connection can be easily performed, and assembling workability can be improved.

The connector 31 and the laminate sheet 5
7 is in a conductive state, so that the conductive connector 3
1 is fixed to the attached body 41, the laminate sheet 57
Can be connected to the ground 45 via the connector 31, and the work of individually attaching the terminal crimped to the shield braid to a device or the like on the ground side as in the conventional structure can also be omitted.

Further, according to this shield structure, the connection between the laminate sheet 57 and the connector 31 is established by the locking member 37.
Of the main body 33 and the holding portions 61a and 61b, the peripheral groove 49 and the pressing projection 6
Since the laminate sheet 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-described embodiment, the locking member 3
7 has been described as an example in which the connector 7 is provided integrally with the main body 33 of the connector 31 via the hinge 63, but the locking member 37 is
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 conductive sheet covering the electric wire is put on the main body of the connector, and the engaging member is joined to the conductive sheet to form the connector. Since the connector is electrically connected, there is no need to connect the core wire and the shield braid in separate ways, as in the conventional shielded structure using shielded wires. Only the conductive connector is fixed to the attached body. Thus, the conductive sheet can be connected to the ground. As a result, the workability of connecting the ground in the shield structure can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a 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 laminate sheet used in FIG.

FIG. 4 is a sectional view taken along line dd of FIG. 1;

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

6 is a perspective view showing a state where the engagement of the locking member of FIG. 5 is completed.

7A and 7B are views showing a processing example of a shielded electric wire conventionally used as a low-voltage wire for an automobile, in which FIG. 7A is a perspective view showing a state where a terminal is crimped to an unraveled shield braid,
(B) shows an aa sectional view of (A).

8A and 8B show a conventional shield structure of 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 cross-sectional view taken along line bb of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 31 Connector 33 Main part 37 Locking member 41 Attached body 45 Ground 49 Peripheral groove 53 Electric wire 57 Conductive sheet 59 Protective tube 59a Depression 67 Locking projection 69 Pressing projection

Claims (3)

(57) [Claims] 1. A connector comprising: a connector having a cylindrical body portion having conductivity; a conductive sheet covering an entire length of an electric wire; and two semicircular arc-shaped holding portions, which are joined in a cylindrical shape to form the body. A locking member that is pressed and fixed to the outer periphery of the end of the portion, and an attached body that is conductive and has the connector fixed and connected to the ground, and passes the electric wire through the main body. The end of the conductive sheet is placed over the outer periphery of the end of the main body, and the terminal is pressed and fixed with the locking member. The connector, to which the conductive sheet is fixed, is fixed to the attached body to thereby form the conductive sheet. Is connected to the ground via the connector and the attached body. 2. A peripheral groove is formed on an outer periphery of an end portion of the main body, a pressing projection inserted into the peripheral groove is formed on an inner periphery of the locking member, and a peripheral groove of the main body including the peripheral groove is formed. A part of the conductive sheet is pressed into the circumferential groove by the pressing projection and fixed in a bent shape by pressing the locking member from above the conductive sheet covered on the outer periphery of the end. The shield structure according to claim 1. 3. A protective tube having a concave portion on the outer periphery is inserted outside the conductive sheet covering the electric wire, the locking member is connected to the main body, and inserted into the concave portion of the protective tube. Forming a locking projection on the locking member, pressing the locking member to fix the conductive sheet to the main body, and simultaneously inserting the locking projection into the recess to attach the protection tube to the locking member. The shield structure according to claim 1, wherein the shield structure is fixed to the connector via a connector.