JPH09161892A - Shield structure of connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To electromagnetically shield a connecting wire without using a shield wire, and improve the reliability of the shielding. SOLUTION: An equipment side connector 5 fixed to a case 3 containing an electronic equipment has an elastically deflecting and deforming lock part 13, and a connecting side connector 6 to be conductively connected to the equipment side connector 5 also has an elastically deflecting and deforming lock part. When the equipment side connector 5 is connected to the connecting side connector 6, the lock parts 13, 23 are elastically brought into contact with each other to ensure electromagnetic shielding.

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 a connector configured to obtain the same shielding effect as that obtained by using a shield wire without using the shield wire, and particularly as a control device mounted on an automobile. The present invention relates to a wiring technique suitable when reliable shielding performance is required, cost reduction and improvement in maintainability are required.

[0002]

2. Description of the Related Art Today's automobiles are equipped with various electronic devices including a CPU, and as a matter of course, high-frequency signals are transmitted and received by using shielded wires in order to avoid unstable operation of the devices due to noise. To be done. The electronic device and the wiring including the shield wire are detachably connected by a pair of connectors in consideration of workability during assembly and maintenance.

An example of conventional shield line wiring is shown in FIGS.
7, the core wire 84a of the shield braided wire 84 is exposed by stripping the inner insulating coating layer 84b covering the core wire 84a by a predetermined length in the shield structure of the shield wire as shown in FIG. It Further, the braided wire 84c for shield connection (drain short circuit) covering the inner insulating cover layer 84b is folded back on the cut outer cover layer 84d at a position slightly lower than the inner insulating cover layer 84b. . Then, a rubber stopper retainer 86 having a locking projection 86a, a waterproof rubber stopper 85, and a metallic connecting member 87 were mounted on the braided wire 84c and the outer coating layer 84d, and the tip of the shield braided wire 84 was exposed. The terminal fixing fitting 81 is fixed on the core wire 84a.

A connector housing 88 is fitted on the terminal fixing fitting 81. This connector housing 88
Is a cylindrical housing main body 89 which is externally fitted to the terminal fixing fitting 81, a flange 91 which is externally fitted to the housing main body 89, and a cylindrical main body portion 90a which is sandwiched between the housing main body 89 and the flange 91. A metal shell 90 having a flange portion 90b exposed on the front surface side of the flange 91;
It is configured with a C ring 93 that engages with the terminal fixing fitting 81 inserted into the housing body 89 and prevents the terminal fixing fitting 81 from coming off from the housing body 89.

The terminal fixing metal fitting 81 has a female screw portion 82a for screwing a device-side connection terminal 98 on the front end face thereof, and a locking groove with which a C ring 93 is engaged on the outer peripheral portion of the front end side. 82b is formed. Further, the base end face is provided with a core wire insertion hole 83a for inserting the core wire 84a. After inserting the core wire 84a into the core wire insertion hole 83a,
By crimping the outer periphery of the core wire insertion hole 83a, the core wire insertion hole 83a is fixed to the core wire 84a. Further, the connecting member 87 is for connecting the braided wire 84c to the metal case 94 of the electric device through the metal shell 90 described above in a shield connection (drain short circuit), and is a cylinder crimped to the main body 90a of the metal shell 90. The tubular portion and the tubular portion to be crimped to the braided wire 84c are integrally formed.

Further, the rubber packing 85 is provided when the connector housing 88 is fitted onto the terminal fixing metal fitting 81.
The gap between the tubular portion of the flange 91 extending rearward and the outer coating layer 84d of the shield braid 84 is closed to keep the space between the connector housing 88 and the shield braid 84 watertight. On the other hand, the housing main body 89 of the connector housing 88 has a tubular shape whose front end is inserted into the electric wire insertion hole 95 formed in the metal case 94, and the housing main body 89 has an outer periphery on the front end side. Seal ring 9 for waterproofing between 89 and electric wire insertion hole 95
2 is installed. Further, the flange 91 fitted onto the housing body 89 is fixed to the metal case 94 by the bolt 100, and the flange portion 90 of the metal shell 90 is fixed.
b is formed so as to surely contact the metal case 94.

In the above-mentioned shield structure for shielded wire,
As shown in FIG. 8, the connector housing 88 is assembled to the terminal fixing fitting 81 that is crimped onto the core wire 84a of the shield braided wire 84. Next, as shown in FIG. 9, the tip of the housing body 89 of the connector housing 88 is inserted into the wire insertion hole 95 of the metal case 94, and the flange 91 is inserted.
Are fixed to the metal case 94 with bolts 100. Further, if the connection terminal 98 on the device side is screwed to the tip of the terminal fixing metal fitting 81 with the bolt 101, the shield braided wire 8
4 is electrically connected to the connection terminal 98 on the device side, and the braided wire 84c of the shield braided wire 84 is connected to the metal case 94.
Thus, the shield connection (drain short circuit) process for connecting to and the waterproof process between the shield braided wire 84 and the wire insertion hole 95 are surely performed.

[0008]

However, in the shield structure of the shield wire having the above-mentioned conventional structure, the shield wire 8 is used.
It is necessary to remove the braided wire 84c of No. 4 and then fold it back. In order to make good contact between the braided wire 84c and the connecting member 87, the exposed range of the braided wire 84c must be increased. The structure was complicated and the assembly work was troublesome, and the workability was not good.

Further, the shield wire 84 itself is expensive,
Since many parts such as the terminal fixing metal fitting 81 require high-precision cutting, the workability is not good, which is one of the causes of the cost increase. Further, since the braided wire 84c of the shielded wire 84 is crimped and connected to the connection member 87, when the wire diameter of the shielded wire 84 changes, not only the connection member 87, but also the rubber packing 85 and the like must be replaced. There was no degree.

An object of the present invention is to provide a shield structure of a connector which is simple in structure and easy to assemble and disassemble, and which connects electronic devices in an electromagnetically shielded state without using a shield wire. .

[0011]

The above object of the present invention is achieved by the shield structure of a connector configured as shown in the following (1) and (2). (1) A device-side connector that is fixed so that the conductive coating applied on the surface with the connecting wire inserted is in contact with the case, and a conductive coating applied on the surface with the connecting wire inserted is on the device side. In a shield structure of a connector including a connection side connector connected so as to make surface contact with the connector, one end of the device side connector is flexible and has a locking projection having a conductive coating on its surface. And a flexible portion at one end of the connection side connector, and elastically bends the engagement portion when connecting the connection side connector to the device side connector. A shield structure for a connector, comprising: a locking portion having a locking projection that locks after the locking projection is overcome.

(2) A pressing portion is provided at one end of the locking portion to release the locking of the locking projection by flexibly deforming the locking portion by pressing. Connector shield structure.

According to the shield structure for a connector having the above-mentioned structure according to the present invention, the surface of the device-side connector is provided with a conductive coating, and the surface of the connection-side connector connected to the device-side connector is also provided with a conductive coating. Has been applied. The device-side connector and the connection-side connector are connected so that their surfaces are in surface contact with each other, so that they are mechanically integrated and electrically connected to the connection wire inserted through the inside. It comes to have a shield effect.

Further, in the present invention, the device-side connector is provided with an elastic locking portion, and the conductive coating is also formed on the surface of the locking portion. Further, the connecting side connector is also provided with an elastic locking part, and since the conductive coating is formed on the surface thereof, the locking parts are locked when the connecting side connector is connected to the device side connector. As a result, the conductive connection is made even more reliably. As a result,
The electric wire can be electromagnetically shielded without using a shielded wire, and furthermore, the elasticity of the locking portion can prevent contact failure due to vibration or the like, in other words, shield failure.

Further, since the engaging portion of the connecting side connector is provided with the pressing portion, when the connecting side connector is detached from the device side connector, the pressing portion is provided to release the engaging of the engaging portions. And can be easily removed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a shield structure for a connector to which the present invention is applied will be described in detail with reference to FIGS. 1 is a partially cutaway side view showing the shield structure of the connector of the present invention, FIG. 2 is another side view showing the configuration of the shield structure of the connector, and FIG. 3 shows the action of the locking portion when locking the connector. FIG. 4 is a partially cutaway side view showing the action after the connector is locked, FIG. 5 is an enlarged cross-sectional view of an essential part showing the structure and locking action of the locking part of the connector, and FIG. It is a schematic explanatory view showing a usage pattern of the connector.

First, a usage mode of the shield structure (hereinafter simply referred to as a shield structure) 1 of the connector in this embodiment will be described. This shield structure 1 is an electronic device (not shown) housed inside cases 2 and 3 as shown in FIG.
Is used, for example, when connecting with a high-voltage cable 4 in a shielded state, and a device-side connector 5 fixed to the case 3 as shown on the right side of FIG. A connection side connector 6 that is freely connected is provided.

The connector 7 fixed to the case 2 and the connection side connector 6 are connected via a corrugated tube 8 around which a shield sheet described later is wound.
Then, the high voltage cable 4 corresponding to a connection electric wire is inserted into the inside of the connector 7, the corrugated tube 8, the connection side connector 6, and the device side connector 5. Therefore, the high-voltage cable 4 is connected to the electronic device in a state of being electromagnetically shielded, the influence of noise and the like generated from the high-voltage cable 4 can be prevented, and an expensive shield structure which is troublesome for wiring work is unnecessary. Become.

Next, each member constituting the shield structure 1 will be described. The device-side connector 5 includes a cylindrical fitting portion 11 that fits into a mounting opening 3a formed in the case 3, a flange 12 that is fixed to the case 3 with a screw, and a connection side, as shown in each of FIGS. Locking part 13 that locks to the connector 6
And a tubular connection portion 14 configured to cover the connection side connector 6. An O-ring 15 made of rubber or the like is fitted to the outer surface of the fitting portion 11, and is pressed against the mounting opening 3a to prevent the infiltration of water into the case 3. In addition, the O-ring 16 is also provided on the outer surface of the connecting portion 14.
Are fitted to each other so as to keep the space between the connector 6 and the connection side connector 6 watertight.

The device-side connector 5 is made of synthetic resin and is integrally molded. However, the entire outer surface is plated with Ni, which corresponds to a conductive coating, and fixed to the case 3 via the flange 12. Thus, the whole is electrically connected to the case 3. The flange 12
A screw insertion hole 12a is formed in the case, and is screwed to the case 3.

By the way, the locking portion 13 has a shape which extends from the vicinity of the flange 12 in the direction of the connecting portion 14 in the longitudinal direction, and has elasticity in the vertical direction as a whole. This locking part 1
A locking projection 13a is provided at the tip of the connector 3 downwardly so as to elastically lock the connection side connector 6 as described later. In addition, as shown in FIG. 2, the guide members 18 are provided on both sides of the locking portion 13 at predetermined intervals.
a and 18b are provided to guide the locking member provided on the connection side connector 6.

The connecting side connector 6 is basically a cylindrical body as shown in the sectional structure in FIGS. 1 and 3, but is dimensioned so as to be fitted into the connecting portion 14 of the device side connector 5 from the outside. The engaging portion 21, the engaging portion 22 that covers the corrugated member 8 for engagement, and the engaging portion 23 for engaging with the engaging portion 13, and the like. A locking groove 24 for locking a corrugated retainer 32 described later is formed. A partition wall 25 is formed in the engaging portion 22, and three wire insertion holes 26 are formed in the partition wall 25 so that the high voltage cable 4 can be inserted at a predetermined interval.

The engaging portion 23 includes the fitting portion 21 to the engaging portion 22.
It is formed in a longitudinal shape toward the direction, and the whole is elastically deformed in the vertical direction. The locking portion 23 is plate-shaped, and a locking projection 23a is formed in the substantially central portion of the locking portion 23 toward the upper side, and a protruding pushing portion 23b is formed at the tip portion. The entire surface of the locking portion 23, that is, the locking protrusion 23
Conductive plating such as Ni plating is also applied to the surface of a and the like. Therefore, when the device-side connector 5 is covered with the connection-side connector 6 and the locking parts 13 and 23 are locked, the device-side connector 5 is mechanically integrated, and the connection part 14 and the fitting part 21 are in close contact with each other. In addition, since the locking portions 13 and 23 elastically contact each other, they come into contact with each other with a low electrical resistance and without any contact failure.

As shown in FIG. 1, the corrugated tube 8 is made of flexible synthetic resin in a bellows shape, and a shield sheet 31 is wound inside the corrugated tube 8. Then, the end portion of the corrugated tube 8 is covered on the outside of the engagement portion 22 of the connection side connector 6, and is clamped from the outside by a corrugated retainer 32 so as to come into pressure contact with the engagement portion 22. The original shape of the corrugated retainer 32 is a shape obtained by half-dividing the tubular body in the longitudinal direction, and the half-divided member is locked by the locking tool 33 to form a tubular shape. That is, as shown in FIG. 1, the engaging portion 22 is covered with one end of the corrugated tube 8 and then with a half-divided member from the outside, and then the locking member 33 is used to form a tubular shape, whereby the corrugated tube 8 is formed. Are fastened and fixed to the engaging portion 22.

The outer surface of the engaging portion 22 is plated with Ni as described above, and the shield sheet 31 is wound around the inner surface of the corrugated tube 8. Therefore, the shield sheet 31 and the engaging portion 22, in other words, the connection side connector 6 are electrically connected, and the high voltage cable 4 inserted through the corrugated tube 8 and the connection side connector 6 is electromagnetically shielded. In addition, an engagement groove 34 that engages with the corrugated shape of the corrugated tube 8 and a locking projection 35 that locks with the locking groove 24 are formed in an annular shape on a part of the inner surface of the corrugated retainer 32. . Therefore, as shown in FIG. 1, when the fitting portion 21 is covered with the corrugated tube 8, the corrugated tube 8 cannot be pulled out, and the corrugated tube 8 is electrically connected to the connection side connector 6 so that there is no contact failure. It will be.

Next, the locking action of the device side connector 5 and the connection side connector 6 will be described. In this case, high voltage cable 4
Connect the corrugated tube 8 through which the
Attach to This attachment is performed by the corrugated retainer 32 as described above. Next, the flange 12 is attached to the case 2.
When the high-voltage cable 4 is inserted into the device-side connector 5 that is fixed via, and the connection-side connector 6 is pushed in,
As shown in FIGS. 3 and 5, the locking protrusions 13a and 23a come into contact with each other.

The contact surfaces of the locking projections 13a and 23b are shown in FIG.
Since it is formed in a tapered surface as shown in an enlarged manner, when the connection side connector 6 is further pushed, the entire locking portion 23 is flexibly deformed in the direction indicated by the arrow A. As a result, the locking projections 13a come over the locking projections 23a, and by further pushing, the locking projections 1a as shown in FIG.
3a completely rides over the locking projection 23a, and the locking projection 2
It comes to be fitted between 3a and the pushing portion 23b.

At this point of time, the connecting side connector 6 covers the entire connecting portion 14, and the inner surface of the fitting portion 21 is covered with the O-ring 16.
The device side connector 5 and the connection side connector 6 are completely integrated in a watertight state. Moreover, the locking portions 13, 2
Since the whole 3 has elasticity, and the surfaces of the engaging portions 13 and 23 as well as the surfaces of the engaging protrusions 12a and 23a are plated with conductive material, they also come into electrical contact with low resistance. It will be. As a result, the high voltage cable 4 is electromagnetically completely shielded by the corrugated tube 8, the connection side connector 6, and the device side connector 5, and the electronic device can operate stably.

In the case 2 shown in FIG. 6, the connector 7 having an electromagnetic shield function is fixed, and the high voltage cable 4 is connected to the electronic equipment in the case 2 via the connector 7. Therefore, electromagnetic shielding is provided at any wiring position of the high-voltage cable 4, and it is possible to completely prevent undesired superposition of noise and the like. A connection terminal 9 is connected to the terminal of the high-voltage cable 4 by crimping or the like so that it can be easily connected to the terminal of an electronic device.

As described above, in the shield structure of the connector to which the present invention is applied, the corrugated tube in which the high voltage cable is inserted is connected to the connection side connector, and the connection side connector is connected to the device side connector. Thus, the electronic device in the case can be connected in a state of being electromagnetically shielded without using a shield wire. Moreover, since the device-side connector and the connection-side connector are connected so as to have conductivity by the elastic locking portions provided on both, the conductivity, that is, the shielding property is impaired even if vibration is applied. Therefore, when applied to a device or a device such as an automobile that is used in a severe environment, the reliability can be significantly improved.

[0031]

As described above, the shield structure for a connector according to the present invention has a structure in which a conductive coating is applied to the surface of a device-side connector that is fixed to a case or the like in which an electronic device or the like is housed. A conductive coating is also applied to the surface of the connection-side connector to be connected, and when the device-side connector and the connection-side connector are connected, the connectors are connected so that they are in surface contact and have conductivity, and the device is also connected. The elastically provided locking portion provided on the side connector and having a conductive coating on the surface, and the elastically provided locking portion provided on the connection side connector and having a conductive coating on the surface are elastically provided. It is something to contact.

Therefore, the connection electric wire such as the high voltage cable inserted in the device side connector and the connection side connector is electromagnetically shielded by the device side connector and the connection side connector. Further, since the engaging portions are elastically in contact with each other, conductive contact is more reliably performed, there is no risk of contact failure even if vibration or the like is applied, and the electromagnetic shield is not damaged. Therefore, when it is applied to a device or a device such as an automobile which is used in a severe environment, the reliability can be greatly improved. In addition, since the shielded wire is not required and the manufacturing is easy, the manufacturing cost can be reduced, and the maintenance is also easy, which is expensive.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a shield structure of a connector according to an embodiment of the present invention.

FIG. 2 is another side view showing the configuration of the shield structure of the connector.

FIG. 3 is a partially cutaway side view showing an action of a locking portion when a connector is connected.

FIG. 4 is a partially cutaway side view showing a state in which a locking portion is locked.

FIG. 5 is an enlarged cross-sectional view of a main part showing an action of a locking part.

FIG. 6 is a schematic explanatory diagram showing a usage pattern of a shield structure of a connector.

FIG. 7 is a cross-sectional view showing an example of a conventional shield structure.

FIG. 8 is a cross-sectional view showing an assembled state of the shield structure in FIG.

9 is a cross-sectional view showing a completed assembly state of the shield structure in FIG.

[Explanation of symbols]

 1 Shield structure of connector 2, 3 Case 4 High voltage cable 5 Device side connector 6 Connection side connector 8 Corrugated tube 11 Fitting part 13, 23 Locking part 13a, 23a Locking protrusion 14 Connection part 15, 160 Ring

Claims (2)

[Claims] 1. A device-side connector in which a conductive coating applied on the surface of a connecting electric wire is fixed so as to contact a case, and a conductive coating applied on the surface of the connecting electric wire is inserted. In a shield structure of a connector including a connection-side connector that is connected to the device-side connector so as to make surface contact with the device-side connector, one end of the device-side connector is flexible and has a surface coated with a conductive coating. A locking portion having a protrusion is provided, and one end of the connection side connector is flexible, and the locking portion is elastically bent when the connection side connector is connected to the device side connector. A shield structure for a connector, comprising: a locking portion provided with a locking projection that locks after the locking projection is overcome. 2. The connector according to claim 1, wherein one end of the locking portion is provided with a pressing portion that bends and deforms the locking portion by pressing to release the locking of the locking protrusion. Shield structure.