JP2016076438A - Fixing structure for shield connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure for a shield connector capable of preventing reduction of an electromagnetic wave shield performance by suppressing a gap to be generated between a housing and a shield shell.SOLUTION: A fixing structure for a shield connector 11 includes: an enclosure 13 in which a connector fitting surface 33 and a bolt fixing surface 35 are substantially orthogonal; a housing 15 from which a wire 71 is led; a shield shell 17 integrally covering an outer peripheral surface 41 of the housing 15 with a cylindrical shell body 39 and including a bolt fixing part 47 which is fixed onto the bolt fixing surface 35; an insertion part 53 which protrudes from the shell body 39 at a side opposite to the bolt fixing part 47 with the housing 15 interposed therebetween to the connector fitting surface 33; and an enclosure recess 19 which is formed on the connector fitting surface 33 and into which the insertion part 53 is fitted when the bolt fixing part 47 is fixed onto the bolt fixing surface 35.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a shield connector fixing structure.

  A vehicle such as an automobile is equipped with a large number of on-vehicle equipment such as motors, and the influence of electromagnetic waves generated from these equipment cannot be ignored. In addition, there is a problem of the influence of electromagnetic waves generated from the connecting portion of the high current / high voltage electric wire. For this reason, although measures differ depending on the source of electromagnetic waves and the type of electromagnetic waves, vehicle-mounted devices, harness connection parts, and the like are protected from electromagnetic interference using techniques such as the electromagnetic shield method.

  As electric wires for supplying power to vehicle-mounted devices and transmitting / receiving signals, electric wires with the core wire shielded as required, so-called shielded electric wires, are widely used. In particular, in order to reduce weight, shielded wires are used for wires that are becoming thinner in diameter because they are easily affected by electromagnetic waves.

  The shielded electric wire has a configuration in which the outer side of the core wire that is covered with the inner skin is covered with a braid and the outer side is covered with an insulating coating with a sheath in order to block electrical noise such as electromagnetic waves and static electricity.

  A high-voltage connector (shield connector) that connects the braided shielded wire to the housing (metal case, etc.) of the above-described device (for example, a PCU (Power Control Unit: electronic control unit) that is a power control unit). ) Collectively connects a plurality of electric wires and includes a shield shell having conductivity to protect the shielded wires and terminals connected to the core wires of the shielded wires in a shielded state (see Patent Document 1).

An example of such a shield connector fixing structure will be described with reference to FIG.
FIG. 7 is a cross-sectional view of an essential part showing a conventional shield connector fixing structure.
A bolt fixing surface 505 having a bolt hole 503 and a connector mounting surface 507 having a housing insertion hole 504 are formed in the housing 501 substantially orthogonally. An electric wire (not shown) is connected to the housing 509 of the shield connector 519. The shield shell 511 integrally covers the outer peripheral surface 515 of the housing 509 with a cylindrical shell body 513. The shield shell 511 has a bolt fixing portion 517 that is bent into an L shape and fixed to the bolt fixing surface 505. The shield connector 519 having such a configuration is fixed to the connector mounting surface 507 by fixing the bolt fixing portion 517 of the shield shell 511 to the bolt fixing surface 505 of the housing 501 with the bolt 521. In other words, the shield connector 519 is bolted by the bolt fixing portion 517 of the shield shell 511 in a direction substantially orthogonal to the housing insertion direction perpendicular to the connector mounting surface 507.

JP 2010-55924 A

  However, when an external force in a direction away from the connector mounting surface 507 is applied to the electric wire connected to the housing 509 due to tension or vibration, the shield shell 511 fixed integrally with the housing 509 has a bolt as shown in FIG. A rotational moment M about the fixed portion 517 is generated. The rotational moment M generates a rotational force in a direction in which the housing 509 is sandwiched between the casing 501 and the shell main body on the side opposite to the bolt fixing portion 517. As a result, a gap S is formed between the shield shell 511 and the housing 501, and there is a possibility that the electromagnetic wave shielding performance is deteriorated.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a shield connector fixing structure capable of suppressing a gap generated between a housing and a shield shell and preventing deterioration of electromagnetic shielding performance. is there.

The above object of the present invention is achieved by the following configuration.
(1) A housing in which a connector mounting surface and a bolt fixing surface are substantially orthogonal to each other, a housing from which electric wires are led out, and a cylindrical shell body integrally cover the outer peripheral surface of the housing and are fixed to the bolt fixing surface. A shield shell having a bolt fixing portion, an insertion portion projecting from the shell body on the opposite side of the bolt fixing portion across the housing toward the connector mounting surface, and the bolt formed on the connector mounting surface. A fixing structure for a shielded connector, comprising: a housing recess into which the insertion portion is fitted when the fixing portion is fixed to the bolt fixing surface.

According to the shield connector fixing structure configured as described above in (1), the shield connector is bolted in the direction substantially orthogonal to the housing insertion direction perpendicular to the connector mounting surface by the bolt fixing portion of the shield shell. . At this time, the insertion portion protruding from the shell main body on the side opposite to the bolt fixing portion is fitted into the housing recess.
Therefore, when an external force acting in a direction away from the connector mounting surface due to tension or vibration acts on the electric wire connected to the housing, a rotational moment centering on the bolt fixing portion is generated in the shield shell fixed integrally with the housing. However, since the insertion portion protruding from the shell main body portion on the opposite side to the bolt fixing portion with the housing interposed therebetween interferes with the housing recess, rotation of the shield shell is restricted. As a result, the generation of a gap due to the shield shell being separated from the connector mounting surface is suppressed.

(2) The shield connector fixing structure according to (1), wherein the insertion portion is a plate-like protruding plate extending from an opening edge of the shell body.

  According to the shield connector fixing structure having the above configuration (2), the protruding plate as the insertion portion can be formed at the same time when the shield shell is formed into a sheet metal, thereby reducing the manufacturing cost. In addition, by changing the shape of the protruding plate, the contact area with the inner wall of the housing recess can be easily increased. As a result, it is possible to easily obtain a protruding plate having a desired rotation regulation strength.

(3) The said insertion part is arrange | positioned in the position where the virtual surface perpendicular | vertical to the said bolt fixing surface including the center axis line of the said shell main body and the said opening edge part cross | intersect (2) The fixed structure of the shield connector of the configuration.

  According to the fixing structure of the shield connector having the configuration (3), the insertion portion is formed at one place. Thereby, the engagement structure with a housing | casing can be simplified. In addition, since this one insertion portion is disposed at a position where an imaginary surface that includes the central axis of the shell body and is perpendicular to the bolt fixing surface intersects with the opening edge, the left and right sides of the shield shell divided into two by the imaginary surface The rotation of the shield shell can be effectively restricted by suppressing the inclination of the.

  According to the fixed structure of the shield connector according to the present invention, it is possible to suppress the gap generated between the housing and the shield shell and prevent the electromagnetic wave shielding performance from deteriorating.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a disassembled perspective view of the fixing structure of the shield connector which concerns on one Embodiment of this invention. It is an assembly perspective view of the shield connector shown in FIG. It is a perspective view of the shield shell shown in FIG. It is principal part sectional drawing for demonstrating the fixing structure of the shield connector which concerns on one Embodiment of this invention. It is a principal part expansion perspective view in the fixing structure of the shield connector shown in FIG. FIG. 5 is a cross-sectional view of a main part at the time of reverse insertion in the shield connector fixing structure shown in FIG. 4. It is principal part sectional drawing of the fixing structure of the conventional shield connector. FIG. 8 is a cross-sectional view illustrating a state where a gap is generated in the shield connector fixing structure illustrated in FIG. 7 together with an enlarged view of a main part thereof.

Embodiments according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the fixing structure of the shield connector 11 according to an embodiment of the present invention includes a housing 13, a housing 15, a shield shell 17, an insertion portion 53, and a housing recess 19 (see FIG. 4). ) And the main components. In addition, the shield connector 11 includes a terminal 21 connected to the end of the electric wire 71, a unit packing 23, a rubber plug 25, a pair of upper and lower rear holders 27, a front holder 29, and a shield ring 31. .

  The housing 13 can be, for example, a housing (metal case or the like) of a PCU (Power Control Unit: electronic control unit) that is a power control unit. Moreover, the housing | casing 13 may be the housing | casing of the inverter mounted in an electric vehicle, a hybrid vehicle, etc. The housing 13 is a housing made of a conductive metal having a connector mounting surface 33 and a bolt fixing surface 35 that are substantially orthogonal to each other.

  The housing 15 is made of an insulating synthetic resin and is formed in a long cylindrical shape. A plurality (three in this embodiment) of terminal housing chambers 37 (see FIG. 4) are formed inside the housing 15. The terminals 21 connected to the ends of the electric wires 71 are mounted in the terminal accommodating chambers 37, respectively. An electric wire 71 is led out from the housing 15. The housing 15 is bolted to the housing 13 via the shield shell 17.

  The shield shell 17 is made of a conductive metal. The shield shell 17 integrally covers the outer peripheral surface 41 of the housing 15 with a cylindrical shell body 39 (see FIG. 3). The shield shell 17 is fixed by, for example, a locking projection 43 protruding from the housing 15 locking a locking hole 45 drilled in the shield shell 17. The shield shell 17 is formed with a pair of bolt fixing portions 47 that are fixed to the bolt fixing surface 35 of the housing 13. In this embodiment, the bolt fixing portion 47 is formed by drilling a bolt insertion hole 49 in an L-shaped bent piece extending from the shell body 39. The shield shell 17 is fastened to the housing 13 with a braided wire (not shown) covering the plurality of electric wires 71 connected to the shell body 39. Thereby, the shield shell 17 has a structure that forms a shield circuit and shields noise.

  The insertion portion 53 protrudes from the shell body 39 on the opposite side of the bolt fixing portion 47 with the housing 15 interposed therebetween, toward the connector mounting surface 33. In the present embodiment, the insertion portion 53 is formed as a plate-like protruding plate that extends from the opening edge portion 51 (see FIG. 3) of the shell body 39. The insertion portion 53 is disposed at a position where the opening edge portion 51 intersects a virtual surface that includes the central axis 55 (see FIG. 3) of the shell body 39 and is perpendicular to the bolt fixing surface 35.

The housing recess 19 is formed in the connector mounting surface 33 of the housing 13. The housing recess 19 is inserted into the insertion portion 53 when the bolt fixing portion 47 is fixed to the bolt fixing surface 35 (see FIG. 4). Insertion means that the insertion portion 53 is inserted. The insertion portion 53 fitted in the housing recess 19 is sandwiched by the housing recess 19 in the plate thickness direction. This fit can be a “clearance fit” that is easy to insert, a “tight fit” (so-called press fit) that provides a reliable interference state, or an “intermediate fit” in between. As shown in FIG. 5, a tapered portion 34 for inserting and guiding the insertion portion 53 is formed at the opening edge of the housing recess portion 19.
In addition, a housing insertion hole 61 into which the front portion of the housing 15 is inserted is formed in the connector mounting surface 33 of the housing 13. The bolt fixing surface 35 of the housing 13 is formed with a pair of bolt holes 59 (see FIG. 1) to which the bolt fixing portion 47 is bolted.

  The terminal 21 is made of a conductive metal and has a plate-like electrical contact portion 65 having a bolt fastening hole 63 on the distal end side. An electric wire connecting portion 67 provided continuously with the electric contact portion 65 is the rear end side. The electric wire connecting portion 67 is connected to the core wire of the electric wire 71.

  The unit packing 23 is formed in an annular shape by an elastic material such as rubber. The unit packing 23 is attached to the outer periphery of the front portion of the housing 15 and waterproof seals between the housing 15 and the housing 13.

  The rubber plug 25 is formed in an annular shape by an elastic material such as rubber. The rubber plug 25 has an electric wire 71 inserted inward. The outer periphery of the rubber plug 25 is in close contact with the inner wall surface of the wire lead-out portion 69 (see FIG. 6) of the housing 15. Thereby, the rubber plug 25 provides a waterproof seal between the housing 15 and the electric wire 71.

  The electric wire 71 includes a conductive core wire and an insulating covering portion that covers the core wire. The core wire of the electric wire 71 is electrically connected to the electric wire connecting portion 67 of the terminal 21. The braided wire covering the plurality of electric wires 71 is electrically connected to the shield shell 17.

  The shield ring 31 fixes and holds the braided wire to the shield shell 17 by crimping the braided wire with the shell body 39.

  The rear holder 27 is attached to the rear portion of the housing 15. The rear holder 27 is attached to the housing 15 to suppress the bending of the electric wire 71. Further, the rear holder 27 prevents the rubber plug 25 from falling out or falling down in the housing 15.

  The front holder 29 is attached to the front portion of the housing 15. The front holder 29 is attached to the housing 15 to restrict the unit packing 23 from being detached. Further, the front holder 29 positions the terminal 21.

Next, the operation of the shield connector fixing structure having the above-described configuration will be described.
In the fixing structure of the shield connector 11 according to this embodiment, as shown in FIG. 4, the bolt fixing portion 47 of the shield shell 17 is fixed to the bolt fixing surface 35 of the housing 13, so that the shield connector 11 is connected to the connector. It is fixed to the mounting surface 33. That is, the shield connector 11 has a bolt fixing portion 47 of the shield shell 17 in a direction (arrow b direction in FIG. 4) substantially perpendicular to the housing insertion direction (arrow a direction in FIG. 4) perpendicular to the connector mounting surface 33. ).

At this time, the insertion portion 53 shown in FIG. 5 protruding from the shell main body 39 on the side opposite to the bolt fixing portion 47 is fitted into the housing recess 19. Since the tapered portion 34 is formed at the opening edge of the housing recess 19, the insertion portion 53 can be smoothly inserted into the housing recess 19.
Therefore, when an external force in a direction away from the connector mounting surface 33 is applied to the electric wire 71 connected to the housing 15 due to tension or vibration, the shield shell 17 fixed integrally with the housing 15 is centered on the bolt fixing portion 47. However, the insertion portion 53 protruding from the shell main body portion on the opposite side of the bolt fixing portion 47 with the housing 15 interposed therebetween interferes with the housing recess portion 19. That is, when the insertion portion 53 tries to be displaced in the direction of the rotation locus (the direction of the arrow c in FIG. 5) by the rotational moment, the insertion portion 53 abuts against the inner wall of the housing recess 19 and is prevented from being displaced. Thereby, even if the said rotation moment generate | occur | produces, the shield shell 17 is controlled by the insertion part 53 which interfered with the housing | casing recessed part 19 by rotation. As a result, the generation of a gap due to the shield shell 17 being separated from the connector mounting surface 33 is suppressed.

  Further, in the fixing structure of the shield connector 11 of the present embodiment, the protruding plate as the insertion portion 53 can be formed at the same time when the shield shell 17 is formed into a sheet metal, and the manufacturing cost is low. Moreover, the insertion part 53 which consists of a protrusion board can increase the contact area with the inner wall of the housing | casing recessed part 19 easily by changing a shape. As a result, it is possible to easily obtain the insertion portion 53 having a desired rotation regulation strength.

  Further, in the fixing structure of the shield connector 11, the insertion portion 53 is formed at one place. Thereby, the engagement structure with the housing | casing 13 can be simplified. Since this one insertion part 53 is arrange | positioned in the position where the virtual surface perpendicular | vertical to the bolt fixing surface 35 including the center axis line 55 of the shell main body 39 and the opening edge part 51 crosses, the shield divided into two by a virtual surface The rotation of the shield shell 17 can be effectively restricted by suppressing the right and left inclination of the shell 17.

FIG. 6 is a cross-sectional view of the main part at the time of reverse insertion in the fixing structure of the shield connector 11 according to the present embodiment.
The shield connector 11 fixing structure of this embodiment is such that when the insertion portion 53 is provided in the shield shell 17, the housing 15 is reversely inserted into the housing insertion hole 61 of the housing 13 as shown in FIG. 6. The insertion portion 53 hits the connector mounting surface 33, and the fitting can be prevented. As a result, when the shield connector 11 is reversely inserted into the housing 13, complete fitting cannot be performed, and early detection of erroneous insertion is possible.

  Therefore, according to the fixing structure of the shield connector 11 according to the present embodiment, it is possible to suppress the gap generated between the housing 13 and the shield shell 17 and to prevent the electromagnetic wave shielding performance from being lowered.

Here, the features of the embodiment of the shield connector fixing structure according to the present invention described above will be briefly summarized below.
[1] A housing (13) in which the connector mounting surface (33) and the bolt fixing surface (35) are substantially orthogonal;
A housing (15) from which an electric wire (71) is led out;
A shield shell (17) having a bolt fixing part (47) fixed to the bolt fixing surface (35) while integrally covering the outer peripheral surface (41) of the housing (15) by a cylindrical shell body (39); ,
An insertion portion (53) projecting from the shell body (39) on the opposite side of the bolt fixing portion (47) across the housing (15) toward the connector mounting surface (33);
A housing recess (19) formed in the connector mounting surface (33) and into which the insertion portion (53) is fitted when the bolt fixing portion (47) is fixed to the bolt fixing surface (35);
A structure for fixing a shield connector (11), comprising:
[2] The shield connector (1) above, wherein the insertion portion (53) is a plate-like protruding plate extending from the opening edge portion (51) of the shell body (39). 11) fixing structure.
[3] Position at which the insertion portion (53) intersects the opening edge portion (51) with a virtual surface that includes the central axis (55) of the shell body (39) and is perpendicular to the bolt fixing surface (35). The fixed structure of the shield connector (11) according to the above [2], characterized in that the shield connector (11) is disposed on the shield connector.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Shield connector 13 ... Housing 15 ... Housing 17 ... Shield shell 19 ... Housing recessed part 33 ... Connector mounting surface 35 ... Bolt fixing surface 39 ... Shell main body 41 ... Outer peripheral surface 47 ... Bolt fixing portion 51 ... Opening edge 53 ... Insertion section 55 ... center axis 71 ... electric wire

Claims (3)

A housing in which the connector mounting surface and the bolt fixing surface are substantially orthogonal;
A housing from which the wire is led out;
A shield shell having a bolt fixing portion that integrally covers the outer peripheral surface of the housing by a cylindrical shell body and is fixed to the bolt fixing surface;
An insertion part projecting from the shell body opposite to the bolt fixing part across the housing toward the connector mounting surface;
A housing recess formed in the connector mounting surface and into which the insertion portion is fitted when the bolt fixing portion is fixed to the bolt fixing surface;
A structure for fixing a shield connector, comprising:   The shield connector fixing structure according to claim 1, wherein the insertion portion is a plate-like projecting plate extending from an opening edge of the shell body.   3. The shield according to claim 2, wherein the insertion portion is disposed at a position where a virtual surface that includes a central axis of the shell main body and is perpendicular to the bolt fixing surface intersects with the opening edge portion. Connector fixing structure.

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