JP2003109707A - Simple electromagnetic wave shield structure and assembling jig for same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple electromagnetic wave shield structure which shields and absorbs electromagnetic wave radiated from electric wires particularly for large current/high voltage and which realizes satisfactory shield characteristics at low cost and to provide also an assembling jig to assemble easily and effectively substantial parts of the structure. SOLUTION: A braid 20 covering the electric wire 10 can be easily and securely connected direct to a body to be fixed to, an outer panel case B of a motor for instance, with an eyelet washer 24 and a bolt 44 at the overlapping section 23. Electromagnetic wave from the electric wire 10 is absorbed by way of a reliable shield conduction route: the overlapping section 23 of the braid 20 → the eyelet washer 24 and the bolt 44 → the outer panel case B → ground G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple electromagnetic wave shield structure for connecting an electric wire / cable or a wire harness to an input / output terminal of a motor mounted on an electric vehicle or an input / output terminal of a general electronic / electric device. The present invention relates to an assembly jig for its main structure.

[0002]

2. Description of the Related Art In recent years, the number of weak electric circuits and electronic circuits in automobiles has been increasing more and more.
As high voltage is advancing, effective and low-cost electromagnetic wave shield measures are required to protect weak electric circuits that are weak against electromagnetic wave noise and prevent detection accuracy of various sensors in electronic circuits from being deteriorated by the influence of electromagnetic wave noise.

FIG. 10 is a side sectional view showing a shielded cable connector disclosed in Japanese Utility Model Publication No. 6-23179 as a conventional example of such an electromagnetic wave shield structure. A plurality of pin terminals 3 are held by a terminal holding retainer 2 provided in a cylindrical metal shell 1. The shielded cable 4 is formed by twisting a plurality of insulated wire cores 5 in which a conductor 5a such as a copper wire is covered with an insulator 5b, and winding a metal braid 6 on the twisted insulated wire cores 5 It is covered with the outermost sheath 7. Each end of the insulated core 5 of the shielded cable 4 is stripped off and the conductor 5a is connected to the pin terminal 3. Further, the sheath 7 of the cable end is peeled off to expose the braid 6, and the braid 6
A cylindrical metal net 8 is covered on the bottom end of the, and a heat shrinkable tube 9 is further covered on the metal net 8. By heating the heat shrinkable tube 9 and pressing down the metal net 8 from above by the shrinking pressure, the metal net 8
Are pressed against the outer peripheral surface of the metal shell 1 to be connected to the metal shell 1 via the braid 6 and the metal net 8.
Is electrically connected to each other to absorb and shield electromagnetic waves generated from each insulated wire core 5 of the shielded cable 4.

[0004] For example, in the case of a motor mounted in an electric vehicle, electromagnetic waves generated from a high-current / high-voltage power supply wire or cable connected to its input / output terminals can prevent external equipment from being affected, Effective electromagnetic wave shielding measures are required to prevent the effects of electromagnetic waves.

FIG. 11 shows an example of an electromagnetic wave shield structure in a power supply wire connecting portion of such a motor. The outer case B of the motor is made of metal such as aluminum, and the electric connector is fixed to the wire lead-in port b ₁ provided in the outer case B, and the power supply wire 1 is inserted through the electric connector.
0 and the like are drawn inside the outer case B. The drawn electric wire 10 terminal is connected to the motor input / output terminal by the terminal fitting 13. In this case, the outer plate case B is grounded to G, and electromagnetic waves generated from the electric wire 10 are dropped to the ground to absorb the electromagnetic waves, thereby achieving shield conduction.

The electric wire 10 is composed of a plurality of wires, and is covered with a braid 14 in which conductive metal wires are braided in a tubular shape from above, and the hem end 14a of the braid 14 is an electromagnetic wave shield terminal member. It is connected by connecting to a cylindrical metal shell 15. The joint of both members is crimped by crimping the fixing band 17 and the braid hem end 14a is attached to the metal shell 1
The entire circumference of No. 5 is pressed. The metal shell 15 is connected to the outer plate case B with a bolt 16 at the flange portion 15a, and the outer plate case B is grounded to the ground G. Therefore, the electromagnetic waves generated from the electric wire 10 are transferred to the braid 14 → the metal shell 15 → the bolt 16 → the outer case B.
→ Shielding path is established and absorbed in the order of earth ground G.

On the other hand, FIG. 12 also shows an example of an electromagnetic wave shield structure. A plurality of electric wires 10 are covered with a braid 14 from above, and one of the electric wires is a drain wire.
Is used as. The hem end 14b of the braid 14
Is elongated along the drain wire, and the stretched hem end 14b is caulked.
And is crimped to the conductor 11 of the drain wire.

[0008]

By the way, as shown in FIG.
Each of the conventional examples of the electromagnetic wave shield structure shown in each of FIGS. 0 to 12 has the following problems.

First, in the case of the structure shown in FIG. 10, a metal net 8 is provided in order to shield the braid 6 from the metal shell 1 in a conductive manner.
Using such a troublesome connecting member, this metal net 8
Is pressed against the metal shell 1 with the heat shrink tube 9. The metal net 8 and the heat-shrinkable tube 9 are disadvantageous in terms of cost, and also the heat-shrinkable tube 9
The force of pressing the metal net 8 against the metal shell 1 is insufficient only by the heat shrinkage force by the above. Therefore, the shield resistance is unstable and effective electromagnetic wave shielding cannot be performed, and the braid 6
The reliability of shield conduction from the metal shell 1 to the metal shell 1 is lacking. In addition, if the heat-shrinkable tube 9 is damaged such as ruptured, the metal net 8 comes off and loses the role of connecting the metal shell 1 and the braid 6 to cause electrical discontinuity, and the original electromagnetic wave is lost. There is a concern that the shield function will be impaired.

Further, in the case of the structure shown in FIG. 11, in order to insert a plurality of electric wires 13 for a shield measure, the momentary metal shell 15 and the fixing band 17 have a large diameter and are disadvantageous in terms of cost. Is. Further, similarly to the heat-shrinkable tube 9 shown in the conventional structure of FIG. 10, the entire circumference of the tube mouth of the hem end portion 14a of the braid 14 is uniformly and firmly pressed against the outer peripheral surface of the metal shell 15 by the fixing band 17. It is difficult to obtain sufficient electromagnetic wave shielding performance due to uneven contact.

Further, in the structure of FIG. 12, a part of the hem end 14b of the braid 14 is elongated and elongated by the length for drawing out the drain wire, and sometimes several tens of mm to several hundreds of meters.
The work of stretching to a length such as m is very time-consuming and inefficient, and it is necessary to allow for an extra length as the braid 14 is stretched, which increases material costs and work costs. Further, in this case, in terms of the basics of the electromagnetic wave shield measures, only one of the plurality of electric wires 10 is used as the drain wire, and the shield measures cannot be completely covered for all the other electric wires 10. . Furthermore, it is important to note that when the hem end 14b of the braid 14 is elongated and elongated, the strands 14c of the other hem end are frayed or loosened, which deteriorates the electromagnetic shielding performance.
Therefore, it is an important subject that the strand 14c of the hem end portion 14b of the braid does not fray and the shape of the tube mouth is stably maintained in a fixed shape.

From the above, the object of the present invention is to provide a high current
A simple electromagnetic wave shield structure that shields and absorbs the electromagnetic waves generated from high-voltage distribution lines and obtains satisfactory shielding performance with a low-cost structure, and to easily and efficiently assemble the essential parts of the structure. To provide an assembly jig.

[0013]

In order to achieve the above object, a simple electromagnetic wave shield structure according to a first aspect of the present invention has a terminal metal fitting 13 at an end of an electric wire as shown in FIGS. The crimped electric wire 10 is covered from the outside with a braid 20 in which a conductive wire is braided into a tubular shape, and the braid 20 of the braid 20 is covered.
2 Metallic eyelet-shaped washer so that solder is evenly attached all over the circumference to bring all the strands into a shielded conductive state with each other, and bolts can be inserted into the overlapped portion 23 in the vicinity of the tube opening 22 which is doubled. 24 is assembled, and the overlapped portion 23 of the braid 20 is connected to the attached body B, which is grounded G on the equipment side, through the eyelet-shaped washer 24 with a bolt.

With the above construction, as shown in FIG. 5, the braid 20 in which the conductive strands are braided in a tubular shape is formed by the eyelet-shaped washer 24 and the bolt 44, which are simple and inexpensive parts to be attached B.
A strong electromagnetic wave shielding performance can be obtained by firmly coupling to. Solder (reference numeral 31 in FIG. 2) is attached to the tubular opening 22 of the braid 20 so that each of the conductive wires forming the mesh is electrically connected to each other, and the connection of the electrically conductive wires is overlapped. It extends to section 23.
The eyelet-shaped washer 24 will be connected to all of the conductive wires of the overlapping portion 23, and by metal-bonding the eyelet-shaped washer 24 to the outer case B, the induced current generated in the entire braid 20 can be reduced. It can be absorbed and dropped to the ground to escape.

Further, the simple electromagnetic wave shield structure according to the second aspect is configured as an electric connector, as shown in FIGS.
With the end of the electric wire 10 and the terminal fitting 13 drawn into the electric wire drawing port b ₁ , the overlapping portion 23 of the braid 20 is housed in the metal cover 40 and the resin housing 50 that form the electric connector. It is characterized by being tightened together at 44.

With the above construction, for example, when the body B to be mounted is an outer case of a motor mounted on an electric vehicle and grounded to ground G, the outer case B is used to house the braid 20 for conducting the shield. As the connector, extremely only the overlapping portion 23 of the braid 20 needs to be locally accommodated, so that there is an advantage that the structures of the metal cover 40 and the resin housing 50 can be simplified and downsized.

Further, in the simple electromagnetic wave shield structure according to the third aspect, as shown in FIGS. 8 and 9 as a second embodiment configured as an electric connector, the metal housing is used in place of the resin housing 50. The simple electromagnetic wave shield structure according to claim 2, wherein the eyelet-shaped washer 25 can be directly engaged with a bracket 72 provided integrally with the manufactured cover 40.

With the above construction, the eyelet-shaped washer 25 having a shape as shown in FIG.
If it is locked to the bracket 72, the resin housing 50 becomes unnecessary, the number of members can be reduced, and a large cost reduction can be realized. Further, since the number of housing members is reduced, the size and bulk of the entire structure are reduced. This is especially effective when the installation space is severely limited such as the body of an automobile.

The assembling jig of the simple electromagnetic wave shield structure according to claim 4 is shown in FIGS. 3 (a), (b) and FIG.
As shown in (a) to (d), when the eyelet-shaped washer 24 (or 25) is integrally assembled to the overlapping portion 23 of the braid 20, the bolt hole 24a is formed in the center and the bolt hole 24a Knitting claw 2 that can be folded
4b is erected and seated on the seat 60 for positioning and holding the eyelet-shaped washer 24, and the braid 20 is set so as to pass through the bolt holes 24 of the eyelet-shaped washer 24 on the seat 60. It has a taper guide portion 61a that can push the mesh of the portion 23 wide and insert it, and by this taper guide portion 61a, the overlapping portion 23 can be dropped and guided to a position outside the knitting claw 24b of the eyelet-shaped washer 24. By pressing the press punch 61 into contact with the press guide 61 and the taper guide portion 61a of the press punch 61, the knitting claw 24 of the eyelet-shaped washer 24 is pressed.
A pressing die 62 for pressing and bending b from above and crimping it to the overlapping portion 23 of the braid 20 from above is provided.

With the above construction, when the eyelet-shaped washer 24 is integrally assembled to the overlapping portion 23 of the braid 20, the jig including the seat 60, the press punch 61 and the pressing die 62 can be used to perform the work easily and efficiently. It can be carried out. The eyelet-shaped washer 24 functions as a connecting member like the metal net 8 in FIG. 10 shown as a conventional structure, but the eyelet-shaped washer 24, which is cheaper than the metal net 8, is braided 20. It can be assembled efficiently and firmly using a jig.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a simple electromagnetic wave shield structure according to the present invention will be described below in detail with reference to the drawings.

In FIG. 1, electric wires / cables and wire harnesses (hereinafter collectively referred to as electric wires 10 for convenience) that have been routed around a vehicle body of an automobile or the like (hereinafter collectively referred to as electric wires 10) are covered with a braid 20 from above over their entire length. Also, for example, a corrugated tube (not shown) may be covered from above the braid 20 to protect each important point of the installation location. Braid 2
In the present example, 0 is a conductive metal wire braided into a tubular shape, but a wire wound by spirally winding a Cu (copper) plated finish on a resin wire such as polyester is used as a mesh wire, It is also well known that it is knitted in a tubular shape.

The electric wire 10 is shown by extruding and covering an insulator 12 on a conductor 11 such as a copper wire. The conductor 12 which is obtained by peeling off the insulator 12 of each terminal is exposed to a terminal fitting such as an LA terminal. 13 is crimped and crimped at the crimped portion 13a. Such electric wire terminals and terminal fittings 13
As shown in the mounting examples in each of FIG. 5 and subsequent figures, an outer wire case B made of metal such as aluminum of a motor mounted on an electric vehicle is used as a mounted body, and a wire lead-in port provided through the outer case B is provided. drawn from b ₁ . Retracted terminal fitting 1
3 is fastened to the motor input / output terminals by bolts (not shown) in the bolt holes 13b so that electrical conduction can be achieved. At this time, an electromagnetic wave shield treatment is performed on the braid 20 and the following members so that the electromagnetic waves do not affect other devices due to the large current and high voltage flowing through the electric wire 10.

As described in the explanation of the conventional structure, in order to obtain an effective electromagnetic wave shielding function, the treatment of the tube mouth 22 of the braid 20 is an important requirement. Therefore, as shown in FIG. 2, the barrel mouth 2 of the braid 20 is treated by the processing device including the solder bath 30.
A process of attaching solder to 2 is performed. The molten solder 31 contained in the solder bath 30 is dipped in the molten solder 31, and the molten solder 31 is attached to the tubular opening 22 of the braid 20 held by the jig 32. In this manner, the molten solder 31 is attached to the barrel opening 22 and solidified, so that the metal wire
Each book keeps its regular shape without fraying or falling apart, and is in electrical continuity with each other. Keeping the tube mouth 22 in a fixed shape also improves the efficiency of dimensioning in the subsequent wiring work and connection work to equipment. Further, the jig 32 has a dome shape, and the flange attachment portion 32a provided on the opening edge is pressed against the tubular opening 22 of the braid 20 to make the solder attachment work efficient.

The braid 20 in which the tubular opening 22 is fixed by soldering in this way is in a state in which each electric wire 10 is passed through (FIG. 1).
Then, an overlapping portion 23 is provided by double-folding the vicinity of the tube mouth, and a metal eyelet-shaped washer 24, which is a gist member of the present invention, is assembled and set so as to spread the mesh of the braid 20. ing. This eyelet-shaped washer 24 has bolts 4 attached to a motor outer case B, which is grounded as an attached body, as shown in each of FIGS.
At 4 it is a washer member that directly connects the braid 20 and at the same time functions as an electromagnetic wave shield terminal.

Here, FIGS. 3A and 3B show a jig for assembling the eyelet-shaped washer 24 to the overlapping portion 23 of the braid 20, and FIGS. 4A to 4D show the jig. The washer assembly process used is shown in order. Eyelet-shaped washer 2
4 has a bolt hole 24a (see an enlarged circle in FIG. 6) at the center of a disk seat formed by press punching a metal plate, and a pair of knitting claws 24b facing each other from the hole edge of the bolt hole 24a.
And a pair of opposing positioning claws 24c are provided from the outer edge of the disc seat so as to rise back to back with the knitting claws 24b.

First, the positioning claw 2 of the eyelet-shaped washer 24.
4c is inserted into the positioning slit 60c of the seat 60 and set [FIG. 4 (a)]. Next, press punch 61
Of the main portion 61b of the eyelet-shaped washer 24 to the bolt hole 24a.
The punch receiving hole 60b on the pedestal 60 side is fitted while passing through [Fig. 4 (b)]. Next, the press punches 6 standing upright in order of one side and the other side of the overlapping portion 23 of the braid 20.
The taper guide portion 61a of No. 1 is pressed, and the mesh of the metal element wire is expanded and pushed down until it hits the outer side of the knitting claw 24b of the eyelet-shaped washer 24 already set [FIG. 4 (c)]. After this, the pressing die 62, which is the third jig
This concave portion 62b is engaged with the taper guide portion 61a of the press punch 61 and pushed down by using the.
The knitting claws 24b of the eyelet-shaped washer 24 are pressed while being guided so as to be wound around both side portions of the lower end of the la, and are folded and hooked onto the overlapping portion 23 of the braid 20 (FIG. 4 (d)).
After the assembling in this way, the overlapping portion 23 and the eyelet-shaped washer 24 of the braid 20 which are integrated are connected to the slit 6 of the seat 60.
Release from 0c and release.

In FIG. 5, the electric wire 10 is covered from the outside by the braid 20 in which the eyelet-shaped washers 24 are assembled in this manner,
An example of the structure in which the electric wire 10 is drawn into the outer case B of the motor through the electric wire drawing port b1 and is connected to the motor input / output terminal by the terminal fitting 13 is shown. That is, the terminal metal fitting 13 of the wire end is connected to the outer case B by the wire lead-in port b
In the set state in which the braid 20 is pulled in, the bolts 44 are screwed into the female screw holes b2 of the outer plate case B at the overlapping portion 23 of the braid 20 close to the barrel opening, and are directly connected.

With such a structure, electromagnetic waves generated from the high-current / high-voltage electric wire 10 during energization and use after being mounted on an actual machine are such that the overlapping portion 23 of the braid 20 → the eyelet-shaped washer 24 → the bolt 4
It is absorbed in the shield conduction path of 4 → outer plate case B → earth ground G.

In this case, since the tube mouth 22 of the braid 20 is soldered and all of the meshes of the metal wires are electrically connected to each other, all the metal wires are connected to each other. The shield conduction due to will also extend to the overlap 23 and the eyelet washer 24 will be connected to all such metal strands. As a result, if the eyelet-shaped washer 24 is directly connected to the outer case B by metal bonding and grounded to ground G, the induced current generated in the entire braid 20 is absorbed,
You can drop it on the ground and let it escape.

Thus, the bolt 44 and the eyelet-shaped washer 2
Only by using a simple and inexpensive component such as No. 4, as shown in FIG. 5, when the braid 20 is strongly and reliably directly connected to the motor outer case B which is the attached body, effective electromagnetic wave shielding performance can be realized. . Such effects and advantages are as shown in Fig. 1 above.
It is clear from comparison with any of the conventional structures of FIG. 0, FIG. 11 and FIG.

On the other hand, FIG. 6 and FIG. 7 are an exploded perspective view and an assembly showing the first embodiment in which the electric wire terminal portion accommodated in the electric connector is pulled in and connected to the motor outer case B of the attached body. FIG.

The electric wire 10 having the terminal metal fitting 13 at the end is inserted into the electric wire lead-in port b ₁ of the outer plate case B, and the terminal metal fitting 13 is connected to the motor input / output terminal. At this time, the braid 20 together with the metal cover 40 and the resin housing 50 that form the electrical connector are attached to the outer case B by the bolts 44.
Are tightened together. The metal cover 40 has a bolt hole 42 at an appropriate position of the main body portion 41 and a lock hole 43 at a side plate portion. The resin housing 50 is provided with a metal collar 52 into which a bolt 44 is inserted and which is fitted in an appropriate position of the main body 51. As is apparent from FIG. 7, the metal collar 52 is a member that contacts both the eyelet-shaped washer 24 and the outer plate case B that are integral with the overlapping portion 23 of the braid 20 and relays them in an electrically conductive state. . Therefore, the metal collar 52 can also be regarded as a member having an electromagnetic wave shield terminal function like the eyelet-shaped washer 24.

Further, the resin housing 50 is formed with a pair of opposing positioning slits 53 at the left and right positions of the metal collar 52, and a pair of opposing positioning claws 24c provided on the eyelet-shaped washer 24 are provided with the positioning slits 53.
It is designed to be inserted into and decided temporarily. The lock hole 43 on the side of the metal cover 40 is formed on the side surface of the main body 51.
It has a lock convex portion 54 that engages with, and can be assembled with the metal cover 40 with almost one touch.

As described above, the metal cover 40 and the resin housing 50 constituting the electric connector may have a size and a shape that can accommodate at least the overlapping portion 23 of the braid 20 and the eyelet-shaped washer 24 inside. The entire connector can be miniaturized.

From the above, the simple electromagnetic wave shield structure according to the first embodiment operates as follows. In a set state in which the terminal fitting 13 of the wire end is drawn into the outer plate case B from the wire drawing port b ₁ , the bolt 44 is passed through the eyelet-shaped washer 24 in the overlapping portion 23 of the braid 20, and the metal cover of the electrical connector is in that order. 40, eyelet-shaped washer 24, and metal collar 5 on the resin housing 50 side
2 is passed through, and screwed into the female screw hole b ₂ of the outer plate case B to be coupled.

As a result, the electromagnetic wave generated from the electric wire 10 is absorbed in the shield conduction path of the overlapping portion 23 of the braid 20, the eyelet-shaped washer 24, the metal collar 52, the bolt 44, the outer case B, and the earth ground G. The metal cover 40 can also absorb electromagnetic waves as a metal shell forming an electromagnetic wave shield terminal.

Next, FIGS. 8 and 9 are an exploded view and an assembly view showing the second embodiment in a state of being accommodated in the electric connector.

In this case, as a member or portion replacing the resin housing 50 shown in FIG. 6 of the first embodiment, the bracket 7 is integrally formed from the side wall of the metal cover 70.
2 is provided, and the eyelet-shaped washer 2 is directly attached to the bracket 72.
5 can be temporarily positioned. Therefore, since the resin housing 50 can be reduced, the cost can be greatly reduced, and the entire electrical connector can be downsized, which is particularly effective when the installation space of the vehicle body or the like is severely limited.

That is, the bracket 72 of the metal cover 70 is provided with a bolt hole 73 that is a bare hole through which the bolt 44 is inserted, and a pair of opposed positioning slits 74 are formed at the left and right positions thereof. Further, the folding claws 75 are provided so as to project from both sides of the bracket 72, and the folding claws 75 can be bent and crimped from the back to the overlapping portion 23 of the braid 20 to be hooked.

Further, the eyelet-shaped washer 25 in this case has a rectangular bolt hole 25 in which only the bolt 44 is inserted through the center of the disk seat.
a, a pair of opposed knitting claws 25b is formed at the hole edge of the bolt hole 25a, and a pair of opposed locking claws 25c are raised on the outer peripheral edge of the disc seat. By inserting the locking claws 25c into the two positioning slits 74 of the bracket 72 provided on the metal cover 70, the overlapping portion 23 of the braid 20 is directly coupled to the metal cover 70 via the eyelet-shaped washer 25. can do. Therefore, the metal cover 70 of the second embodiment is a member that should be called an electromagnetic wave shield terminal having the same function as the eyelet-shaped washer 25 in the sense that the braid 20 is directly coupled.

[0042]

As described above, in the simple electromagnetic wave shield structure according to the first aspect of the present invention, a simple and inexpensive component, which is a braided braiding conductive element wire in a tubular shape, is an eyelet type washer and a bolt. Therefore, by firmly coupling to the attached body, reliable electromagnetic wave shielding performance can be obtained. Solder is attached to the tubular mouth of the braid, and each of the conductive wires forming a mesh is electrically connected to each other, and the connection of the conductive state extends to the overlapping portion. It is connected to all of the conductive wires of the overlapping portion, and by being metal-bonded to the attached body, the induced current generated in the entire braid can be absorbed and dropped to the ground to escape.

Further, in the simple electromagnetic wave shield structure according to the second aspect, for example, when the attached body is a motor outer case which is mounted on an electric vehicle and grounded, a braid for shield conduction to the outer case is provided. As an electric connector for housing the connector, extremely only the overlapping portion of the braid needs to be locally housed, so that the structure of the connector housing can be simplified and downsized.

Further, in the simple electromagnetic wave shield structure according to the third aspect, if the eyelet-shaped washer is directly engaged with the bracket of the metal cover, the resin housing of the electric connector becomes unnecessary and the number of members is increased. This is particularly effective when the size and bulk of the connector structure are reduced and the installation space is severely limited, such as the body of an automobile.

On the other hand, in the assembling jig of the simple electromagnetic wave shielding structure according to claim 4 of the present invention, a seat, a press punch and a pressing die are used to integrally assemble the eyelet type washer to the overlapping portion of the braid. You can work easily and efficiently with a simple jig.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which an electric wire is covered with a braid, which is a gist member of a simple electromagnetic wave shield structure according to the present invention.

FIG. 2 is a cross-sectional view showing an apparatus for attaching solder to the tube mouth of the braid.

3 (a) and 3 (b) are perspective views showing an assembly jig for assembling the eyelet-shaped washer to the braid.

4A to 4D are cross-sectional views sequentially showing an assembling process of assembling an eyelet-shaped washer to the braid.

FIG. 5 is an assembly side view showing a simple electromagnetic wave shield structure of a direct braid type according to the present invention.

FIG. 6 is an exploded perspective view showing a first embodiment of a structure including each member for coupling the present structure housed in an electric connector to a motor outer case which is an attached body.

FIG. 7 is an assembled side sectional view of the present structure according to the first embodiment.

FIG. 8 is an exploded perspective view showing a second embodiment of a structure including each member for coupling the present structure housed in an electric connector to a motor outer case which is an attached body.

FIG. 9 is an assembled side sectional view of the structure according to the second embodiment.

FIG. 10 is an assembled side sectional view showing a conventional example of an electromagnetic wave shield structure.

FIG. 11 is an assembled side sectional view showing another conventional example of an electromagnetic wave shield structure.

FIG. 12 is an assembled side sectional view showing a conventional example of still another electromagnetic wave shield structure.

[Explanation of symbols]

10 Electric Wire 11 Conductor 12 Insulator 13 Terminal Bracket 20 Braid 21 Braid Main Body 22 Cylinder Mouth 23 Overlap 24, 25 Eyelet-shaped Washers 24a, 25a Bolt Holes 24b, 25b Braid Claw 24c Positioning Claw 25c Locking Claw 31 Molten Solder 40, 70 Metal cover (electrical connector) 44 Bolt 50 Resin housing (electrical connector) 52 Metal collar 53 Eyelet-shaped washer positioning slit 60 Base (assembly jig) 61 Press punch (assembly jig) 61a Tapered guide part of braid 62 Push type (assembly jig) 72 Bracket for locking braid B Motor outer plate case (attached body) b ₁ Wire drawing port b ₂ Female screw hole for screwing bolts

Claims (4)

[Claims] 1. An electric wire having a terminal metal fitting crimped to an end of an electric wire is covered from the outside with a braid in which a conductive wire is braided in a tubular shape, and solder is evenly attached over the entire circumference of the tube mouth of the braid to remove all the wire. Put a metal eyelet-shaped washer so that they can be shielded to each other, and bolts can be inserted in the overlapping part where the tube mouth is doubled, and the eyelet is attached to the grounded grounded object on the equipment side. A simple electromagnetic wave shield structure, characterized in that the overlapping portions of the braid are connected with bolts through a shaped washer. 2. The overlapping portion of the braid is accommodated in a metal cover and a resin housing which form an electric connector in a state in which the end of the electric wire and the terminal fitting are drawn into the attached body from the electric wire drawing port. The simple electromagnetic wave shield structure according to claim 1, wherein both are fastened together with a bolt. 3. The simple electromagnetic wave shield according to claim 2, wherein the eyelet-shaped washer can be directly engaged with a bracket provided integrally with the metal cover instead of the resin housing. Construction. 4. The eyelet-shaped washer having a bolt hole in the center and a bendable knitting claw rising from the bolt hole when the eyelet-shaped washer is integrally assembled to the overlapping portion of the braid. A pedestal for positioning and holding, and a taper guide portion that can be inserted by pushing the mesh of the overlapping portion of the braid, which is set in a state of passing through the bolt holes of the eyelet-shaped washer on the pedestal, A press punch in which the overlapping portion is dropped by the taper guide portion to an outer position of the knitting claw of the eyelet-shaped washer so as to be guided, and the taper guide portion of the press punch is brought into contact with the press punch to push down the eyelet shape. A pressing die for pressing the knitting claw of the washer from above and bending it to press it against the overlapping portion of the braid from above. Assembly jig for electromagnetic wave shield structure.