JP2004254478A - Connection structure of shield connector for instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a shield shell bonded to the end of a shielding member to a shield case without a gap so that electrical conductivity can be provided therebetween in an object so designed that a bracket, protruded from the outer circumference of a housing, is fixed on the outer wall face of the shield case. <P>SOLUTION: A shield connector for instruments comprises a housing which holds an electric wire-side terminal bonded to the terminal portions of a plurality of electric wires and the terminal portions of the electric wires, a bracket protruded from the outer circumferential surface of the housing, a cylindrical shielding member which encloses a plurality of the electric wires in a lump, and the cylindrical shield shell bonded to the terminal of the shielding member. An elastic and conductive connecting means is provided between the shield shell and the outer wall face of the shield case. Thus, even if the shield shell 26 is at a distance from the outer wall face of the shield case 11, the shielded area provided by the shielding member 25 and the shielded area in the shield case 11 are not disconnected from each other. This is because the gap between them is filled with the conductive connecting means 29. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection structure of a shield connector for equipment.
[0002]
[Prior art]
Conventionally, as a shield connector for equipment, a wire side terminal is fixed to each end of a plurality of unshielded type wires, the ends of the wires are held in a housing, and a plurality of wires are collectively formed into a cylindrical shape. There is a structure in which a shield member is surrounded and a terminal portion of the shield member is fixed to a cylindrical shield shell. On the other hand, a device to be connected to such a device shield connector has a structure in which a device body and a plurality of device-side terminals provided on the device body are housed in a conductive shield case, and mounting holes are formed in the shield case. .
[0003]
When connecting the equipment shield connector to the equipment, fit the housing in the mounting hole to fix each wire side terminal to the equipment side terminal by bolting, and attach the shield shell to the outer surface of the shield case. The abutment is fixed. Then, by connecting the shield shell to the shield case in a conductive manner, the region shielded by the shield member and the region shielded by the shield case in the conductive path of the electric wire are continued without leaving a gap. (For example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2002-281654 A
[Problems to be solved by the invention]
In the connection structure of the conventional shield connector for equipment described above, the housing is housed inside the shield case, and the housing is not fixed to the shield case. In this case, as the fixing means, a method in which a plate-shaped bracket is projected from the outer periphery of the housing and the bracket is fixed to the outer wall surface of the shield case by bolting is considered.
[0006]
However, if the bracket protruding from the outer periphery of the housing is fixed to the outer surface of the shield case, the shield shell will be separated from the shield case by the thickness of the bracket, and both shield areas There is a gap between them, and there is a concern that the shielding function may be deteriorated.
As a means for avoiding a gap between the shield shell and the shield case, it is conceivable to increase the diameter of the shield shell so that the bracket is surrounded by the shield shell. However, doing so increases the size of the shield shell. In addition, a large area for mounting the shield shell on the outer wall surface of the shield case must be ensured, which may lead to an increase in the size of the device.
[0007]
The invention of the present application has been devised in view of the above circumstances, and in which a bracket protruding on the outer periphery of a housing is fixed to an outer wall surface of a shield case, a shield shell fixed to an end of a shield member enclosing a plurality of electric wires collectively. It is an object of the present invention to enable conductive connection to a shield case without leaving a gap.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is for connecting a device shield connector to a device in which a plurality of device-side terminals are accommodated in a conductive shield case and a mounting hole is formed in the shield case. The device shield connector includes a wire-side terminal fixed to end portions of a plurality of wires, a housing for holding the end portions of the wires, a bracket protruding from an outer periphery of the housing, and the plurality of wires. A cylindrical shield member for enclosing the electric wires in a lump, and a cylindrical shield shell fixed to a terminal portion of the shield member, wherein the electric wire side terminal inserted into the mounting hole is the device side terminal. And the bracket is fixed to the outer wall surface of the shield case, and the shield shell is fixed to the outer wall surface of the shield case. In shall, between the outer surface of the shield shell and the shield case has elasticity, and a and structure provided with connecting means having conductivity.
[0009]
According to a second aspect of the present invention, in the first aspect of the invention, the connecting means has a configuration in which the outer periphery of the elastic member is surrounded by a braided wire made of a thin metal wire.
According to a third aspect of the present invention, in the first aspect of the invention, the connecting means has a configuration in which a plurality of conductive and elastically deformable contact pieces are arranged.
According to a fourth aspect of the present invention, in the first aspect of the present invention, the connection means elastically contacts the shield shell with a conductive tubular sheet member having one end connected to the shield shell. And an elastic member that makes the other end of the sheet member abut against the outer wall surface of the shield case.
[0010]
Function and effect of the present invention
[Inventions of Claims 1 to 4]
When the bracket fixed to the outer wall surface of the shield case projects to the outer peripheral side of the shield shell, the end surface of the shield shell is fixed to the outer wall surface of the shield case with a distance corresponding to the thickness of the bracket. However, since the gap between the shield shell and the shield case is filled with a connecting means having conductivity, the shield shell and the shield case are connected through the connecting means so as to be able to conduct without a gap, and the shield by the shield member is used. The region and the shield region in the shield case do not need to be interrupted.
[0011]
Even if the gap between the shield shell and the bracket is smaller than the gap between the shield shell and the outer wall surface of the shield case, the elastic crushing amount of the elastic member at the contact portion with the bracket is increased, so that the gap between the shield shell and the bracket is increased. Therefore, there is no gap between the shield shell and the shield case.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
[Embodiment 1]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0013]
The device 10 according to the present embodiment will be described. A device main body 12 is housed inside a metal shield case 11, and a plurality of (three in this embodiment) device-side terminals 13 are disposed horizontally (in the present embodiment). Left and right). That is, the three device-side terminals 13 are housed in the shield case 11. In addition, three circular mounting holes 14 are formed in the side wall of the shield case 11 so as to penetrate so as to line up left and right corresponding to the device-side terminals 13. On the outer wall surface of the shield case 11, three female screw holes 15 for brackets penetrate into the inner surface of the shield case 11 so as to correspond to the respective mount holes 14 (to be located above the respective mount holes 14). It is formed in the shape of a blind alley. Further, on the outer wall surface of the shield case 11, two female screw holes for the shield shell are located at substantially the same height as the three female screw holes 15 for the bracket and located substantially in the middle of the female screw holes 15 for the three brackets. (Not shown) is formed in a blind alley shape that does not penetrate the inner surface side of the shield case 11.
[0014]
Next, the device shield connector 20 will be described.
The device shield connector 20 includes a wire-side terminal 22 fixed to the front end (terminal portion) of the same number (three in this embodiment) of wires 21 as the device-side terminals 13 and a terminal portion of each wire 21. 23, a bracket 24 protruding from the outer periphery of the housing 23, a cylindrical shield member 25 surrounding the three electric wires at a time, and a cylindrical shield fixed to an end of the shield member 25. And a shell 26.
[0015]
The electric wire 21 surrounds the outer periphery of the conductor 21a with an insulating coating, and the electric wire 21 itself does not have a shielding function. At the end (front end) of the electric wire 21, the insulating coating 21b is stripped off, and the front end of the conductor 21a is exposed.
The electric wire side terminal 22 has a flat plate-shaped device connecting portion 22a in a substantially first half portion and an open barrel-shaped wire crimping portion 22b in a substantially rear half portion. A bolt hole 22c is vertically penetrated at the front end of the device connecting portion 22a. The exposed conductor 21a of the electric wire 21 is fixed to the electric wire crimping portion 22b so as to be conductive by crimping.
[0016]
The housing 23 is made of synthetic resin and is integrated with the electric wire side terminal 22 and the electric wire 21 by molding. Inside the housing 23, the electric wire crimping portion 22 b of the electric wire side terminal 22 and the rear end of the device connecting portion 22 a are provided. The part, the fixed part of the electric wire 21 to the electric wire crimping part 22b, and the front end of the insulating coating 21b of the electric wire 21 are embedded. That is, the front end portion of the device connection portion 22a of the electric wire side terminal 22 protrudes from the front end of the housing 23, and the electric wire 21 covered with the insulating coating 21b is led out from the rear end surface of the housing 23.
[0017]
The housing 23 has a generally circular shape as a whole, and a substantially front half portion has a tapered shape whose diameter is reduced toward the front, and a substantially rear half portion is fitted into the mounting hole 14 without large backlash in the radial direction. Fitting portion 23a. A circumferential mounting groove 23b is formed at a position on the rear end side of the outer periphery of the fitting portion 23a. A circumferential seal groove 23c is formed in a region in front of the mounting groove 23b on the outer periphery of the fitting portion 23a, and a seal ring 27 is mounted in the seal groove 23c.
[0018]
The bracket 24 is made of a synthetic resin or metal, is made of a plate material perpendicular to the axis of the electric wire 21 and the housing 23, and has an egg shape as a whole. At the lower end of the bracket 24 having a relatively large diameter, a circular cutout 24a opening to the lower surface side is formed, and at the upper end of the bracket 24, a bolt hole 24b penetrating in the front-rear direction is formed. . The bracket 24 is attached to the housing 23 so as to project radially outward from the outer periphery of the housing 23 by fitting the notch 24a into the attachment groove 23b.
[0019]
The shield member 25 is formed of a braided wire obtained by braiding a thin metal wire into a mesh shape, and has a tubular shape. The shield member 25 collectively surrounds the three electric wires 21, and a conductive path of the electric wire 21, which is routed behind the housing 23, is shielded by the shield member 25.
A metal shield shell 26 is fixed to the front end of the shield member 25. The shield shell 26 is generally horizontally long and substantially oval (or substantially elliptical). The shield shell 26 has a cylindrical portion 26a penetrating in the front-rear direction and a radially outer portion extending along an opening edge on the front end side of the cylindrical portion 26a. A flange 26b that projects in the direction and a pair of left and right plate-shaped fixing portions 26c that protrude upward from the upper edge side of the flange 26b are integrally formed.
[0020]
The front end of the shield member 25 is externally fitted to the outer periphery of the cylindrical portion 26a, and a caulking tube 28 is externally fitted to the outer periphery of the shield member 25. The caulking tube 28 and the shield shell 26 are shrunk. It is caulked in diameter. By this caulking, the front end of the shield member 25 is conductively fixed to the shield shell 26.
The pair of left and right fixing portions 26c are offset forward (toward the shield case 11 in the state of connection to the device 10) with respect to the flange 26b. In a state in which the connecting means is closely attached to the outer wall surface and is fixed to a dimension slightly smaller than the sum of the thickness of the bracket 24 and the thickness in the front-rear direction in the inelastic state of the connecting means described later. A bolt hole 26d penetrating in the front-rear direction is formed at the upper end of each fixing portion 26c.
[0021]
The connection member 29 (connection means, which is a constituent element of the present invention) includes a rubber elastic member 29a having a substantially oval or substantially elliptical ring shape along the flange 26b (opening edge of the cylindrical portion 26a). The outer periphery of the elastic member 29a is surrounded by an elongated tubular braided wire 29b in which the same thin metal wires as the shield member 25 are woven in a mesh shape. The cross-sectional shape of the elastic member 29a is circular, but may be a shape other than circular, such as elliptical, oval, or square. The connection member 29 is adhered to the front surface of the flange 26b of the shield shell 26 so as to be continuous over the entire circumference by a conductive tape or an adhesive (not shown). Thus, the connection member 29 and the shield shell 26 are connected to be conductive.
[0022]
Next, the operation of the present embodiment will be described.
When connecting the equipment shield connector 20 to the equipment 10, each wire side terminal 22 is inserted into the mounting hole 14 from outside the shield case 11, the housing 23 is fitted into the mounting hole 14, and the bracket 24 is shielded. It is brought into contact with the outer wall surface of the case 11. Then, the device connecting portion 22a of each electric wire side terminal 22 overlaps the device side terminal 13, and the two bolt holes 13a, 22c are aligned with each other. Therefore, the nut 17 is inserted into the bolt 16 inserted into the both bolt holes 13a, 22c. By screwing and tightening, both terminals 13 and 22 are connected in a conductive manner.
[0023]
Outside the shield case 11, the bolt holes 24b of the brackets 24 are aligned with the female screw holes 15 for the brackets, and the bolts 18 inserted into the bolt holes 24b are screwed into the female screw holes 15 for the bracket and tightened. Thus, the bracket 24 is fixed to the outer wall surface of the shield case 11 in a surface contact state, and the housing 23 integral with the bracket 24 is also fixed to the shield case 11 in a state where the housing 23 is restricted in play. The gap between the fixed housing 23 and the mounting hole 14 is sealed by a seal ring 27, so that water from outside and leakage of oil in the shield case 11 in the gap between the mounting hole 14 and the housing 23 are regulated.
[0024]
After the bracket 24 is fixed, the fixing portion 26c of the shield shell 26 is brought into contact with the outer wall surface of the shield case 11, and the bolt hole 26d of the fixing portion 26c is aligned with the female screw hole for the shield shell. At this time, since each bracket 24 protrudes above the upper edge of the flange 26b, each fixing portion 26c is located substantially at the middle of the bracket 24 in the left-right direction. When the bolt 19 inserted into the bolt hole 26d is screwed into the female screw hole for the shield shell and tightened, the shield shell 26 separates the front surface of the flange 26b from the outer wall surface of the shield case 11 by a predetermined distance. It is fixed in the state where it was set.
[0025]
Thus, the operation of connecting the device shield connector 20 to the device 10 is completed.
In the connection completed state, the bracket 24 fixed to the outer wall surface of the shield case 11 protrudes to the outer peripheral side of the shield shell 26, so that the front end surface of the shield shell 26 is thicker than the outer wall surface of the shield case 11. It will be fixed at a distance of minutes. However, the gap between the shield shell 26 and the shield case 11 is filled with a conductive connecting member 29 adhered to the entire front surface of the flange 26b. In other words, the shield shell 26 and the shield case 11 are connected through the connection member 29 so as to be able to conduct without gaps over a wide range except for the portion corresponding to the bracket 24. As a result, the shield area by the shield member 25 and the shield area in the shield case 11 are not interrupted.
[0026]
Although the gap between the front surface of the flange 26b and the rear surface of the bracket 24 is smaller than the gap between the front surface of the flange 26b and the outer wall surface of the shield case 11, the elasticity of the connection member 29 at the contact portion with the bracket 24 is small. Since the unevenness of both gaps is absorbed by an increase in the amount of crushing, no gap is left between the shield shell 26 and the shield case 11.
Further, since the elastic member 29a of the connecting member 29 is crushed and elastically deformed between the flange 26b and the outer wall surface of the shield case 11, the elastic restoring force allows the elastic member 29a to move between the braided wire 29b of the connecting member 29 and the flange 26b. A predetermined contact pressure is ensured between the braided wire 29b and the shield case 11.
[0027]
[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, the connecting member 30 (the connecting means, which is a component of the present invention) has a different configuration from the first embodiment. Other configurations are the same as those in the first embodiment, and thus the same configurations are denoted by the same reference numerals, and description of the structures, operations, and effects will be omitted.
The connection member 29 of the first embodiment is formed by surrounding a rubber elastic member 29a with a braided wire 29b, but the connection member 30 of the second embodiment is formed by connecting a sponge elastic member 30a having a square cross section with a braided wire 30b. It is surrounded.
[0028]
[Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIGS.
In the third embodiment, the connecting member 31 (the connecting means, which is a component of the present invention) has a different configuration from the first embodiment. Since the configurations of the device 10 and the device shield connector 20 are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and the description of the structure, operation, and effect is omitted.
The connection member 31 according to the third embodiment is formed by bending a metal (for example, copper) thin plate material, and has a ring-shaped substrate 31a along the front surface of the flange 26b and an outer peripheral edge of the substrate 31a. A plurality of contact pieces 31b which extend forward from the front side and are folded back toward the inner side, that is, substantially V-shaped elastically deformable pieces are arranged with almost no gap, and the substrate 31a is made of conductive tape or adhesive. It is adhered to the front surface of the flange 26b by an agent. In a state where the device shield connector 20 is connected to the device 10, the contact piece 31 b is elastically deformed by bringing the bent portion of the front end into contact with the outer wall surface of the shield case 11 or the rear surface of the bracket 24, and the contact piece 31 b Due to the elastic restoring force, the connection member 31 is connected to the shield case 26 so as to be conductive with a predetermined contact pressure. The contact piece 31b contacting the bracket has a larger elastic deformation amount than the contact piece 31b contacting the shield case 11.
[0029]
[Embodiment 4]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
In the fourth embodiment, the connecting member 32 (the connecting means, which is a component of the present invention) has a different configuration from the first embodiment. Since the configurations of the device 10 and the device shield connector 20 are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and the description of the structure, operation, and effect is omitted.
The connection member 32 of the fourth embodiment includes a conductive tubular sheet member 32a and a ring-shaped elastic member 32b. The tubular sheet member 32a is made of, for example, aluminum foil, and has an inner peripheral surface coated with a hot melt (not shown) having conductivity. One end (rear end) of the tubular sheet member 32a is conductively bonded by hot melt to an outer peripheral surface of a conductive caulking cylinder 28 which is caulked to the outer periphery of the shield shell 26. I have. As a means for bonding the tubular sheet member 32a to the caulking cylinder 28, a conductive tape or an adhesive can be used.
[0030]
The elastic member 32b is made of rubber, and the elastic member 32b is bonded to the inner peripheral surface of the other end (front end) of the tubular sheet member 32a by hot melt. Further, the front end of the tubular sheet member 32a is bent inward so as to entangle the elastic member 32b in front of the flange 26b, and the rear surface of the entangled elastic member 32b is bonded to an adhesive or tape (not shown). ) Is adhered to the front surface of the flange 26b. A portion of the front end of the tubular sheet member 32a corresponding to the bracket 24 is notched.
[0031]
When the device shield connector 20 is connected to the device 10, the elastic member 32 b is elastically crushed between the flange 26 b and the shield case 11, and a tubular sheet is interposed between the elastic member 32 b and the shield case 11. The front end of the member 32a is sandwiched. Due to the elastic restoring force of the elastic member 32b, the front end of the tubular sheet member 32a is connected to the outer wall surface of the shield case 11 in a conductive manner. The gap between the front end (flange 26b) of the shield shell 26 and the outer wall surface of the shield case 11 is closed by the tubular sheet member 32a.
[0032]
[Other embodiments]
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Can be implemented with various modifications.
(1) In the above embodiment, one electric wire is held by one housing, but the present invention can also be applied to a structure in which one housing holds a plurality of electric wires.
[0033]
(2) In the above embodiment, the electric wire side terminal is held by the housing. However, the present invention can be applied to a structure in which the electric wire side terminal is not held by the housing.
(3) In the above embodiment, the electric wire side terminals are integrated with the housing by resin molding. However, according to the present invention, the present invention can also be applied to a structure in which the electric wire side terminals are assembled to a molded housing.
(4) In the above embodiment, the bracket is a separate component from the housing. However, according to the present invention, the bracket may be formed integrally with the housing.
[0034]
(5) In the above embodiment, the connection means is continuous over the entire circumference including the area corresponding to the bracket. However, according to the present invention, the connection means is provided only in the area excluding the area corresponding to the bracket. May be arranged.
(6) The connecting means is not limited to the one shown in the above embodiment, and a conductive rubber or a hollow sponge pipe with a tubular braided wire wound around the outer periphery of the hollow sponge pipe may be interposed between the shield shell and the shield case. You may.
[Brief description of the drawings]
FIG. 1 is a perspective view of a shielded connector for a device according to a first embodiment. FIG. 2 is a longitudinal sectional view showing a state where the shielded connector for a device is connected to a device. FIG. FIG. 4 is a partially cutaway front view showing a positional relationship between a bracket of a housing and a shield shell. FIG. 5 is a longitudinal sectional view showing a state where a device shield connector of the second embodiment is connected to a device. FIG. 7 is a vertical cross-sectional view showing a state where the device shield connector of the third embodiment is connected to the device. FIG. 7 is a perspective view of the connection means of the third embodiment. FIG. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Device 11 ... Shield case 13 ... Device side terminal 14 ... Mounting hole 20 ... Device shield connector 21 ... Wire 22 ... Wire side terminal 23 ... Housing 24 ... Bracket 25 ... Shield member 26 ... Shield shell 29 ... Connection member (connection) means)
29a ... elastic member 29b ... braided wire 30 ... connecting member (connecting means)
30a elastic member 30b braided wire 31 connecting member (connecting means)
31b ... contact piece 32 ... connection member (connection means)
32a: tubular sheet member 32b: elastic member

Claims (4)

For accommodating a plurality of device-side terminals in a conductive shield case and for connecting a device shield connector to a device having a mounting hole formed in the shield case,
The device shield connector,
A wire side terminal fixed to the ends of the plurality of wires, a housing for holding the ends of the wires, a bracket protruding from the outer periphery of the housing, and a tubular shape enclosing the plurality of wires collectively. Comprising a shield member and a tubular shield shell fixed to a terminal portion of the shield member,
The wire side terminal inserted into the mounting hole is connected to the device side terminal, and the bracket is fixed to the outer wall surface of the shield case, and the shield shell is fixed to the outer wall surface of the shield case. In what
A connection structure for a shield connector for equipment, wherein connection means having elasticity and conductivity is provided between the shield shell and an outer wall surface of the shield case. 2. The connection structure for a shielded connector for a device according to claim 1, wherein the connection means has a form in which an outer periphery of the elastic member is surrounded by a braided wire made of a thin metal wire. 2. The connection structure for an equipment shield connector according to claim 1, wherein said connection means has a form in which a plurality of contact pieces having conductivity and capable of being elastically deformed are provided side by side. The connecting means is a conductive tubular sheet member having one end connected to the shield shell, and the other end of the tubular sheet member is elastically contacted with the shield shell to be outside the shield case. 2. The structure according to claim 1, further comprising: an elastic member that is in contact with a wall surface.

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