JP5229580B2 - Shield connector - Google Patents

Description

  The present invention relates to a shield connector.

  Conventionally, as a shield connector having a shield function, for example, a connector described in Patent Document 1 below is known. The shield connector includes a housing that is attached and fixed to an attachment portion provided in the device side case, a shield shell that is formed so as to cover the housing, and the like. The shield shell is formed by pressing an iron plate material as a base material, and includes an insertion hole for inserting a bolt into the fixing hole of the device side case. The fixing hole and the insertion hole are formed larger than the fixing hole so that the bolt can be fastened even when the axial positions of the fixing hole and the insertion hole are deviated within a predetermined tolerance range.

JP 2009-104837 A

  However, if the insertion hole is made larger than the fixing hole, the housing may be displaced and fixed to the mounting portion in the fitting direction. In that case, a gap is formed in the facing portion where the shield shell and the attachment portion face each other, which may be a cause of reducing the shielding performance.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve the shielding performance.

  The present invention relates to a shield connector that is connected to a mounting portion that protrudes in a hood shape from the outer surface of a metal case, and includes a housing and a cylindrical metal shell that covers the outer surface of the housing A main body, a metal fixing piece that is provided integrally with the shell main body and is bolted to the outer peripheral surface of the mounting portion from a direction intersecting the protruding direction of the mounting portion, and a shell side end on the mounting portion side of the shell main body It is characterized in that it is sandwiched between the case side end portion of the shell main body side in the mounting portion and the mounting portion, and has a configuration comprising a conductive material that connects the shell side end portion and the case side end portion so as to be conductive. .

  According to such a configuration, the shell body and the attachment portion are connected to each other through the conductive material by bolting the fixing piece to the attachment portion. Here, depending on the mounting state of the shell body, a gap may be formed between the shell side end and the case side end. Even in this case, the gap is covered with the conductive material, and the conductive material is grounded to both the shell body and the attachment portion, so that the shielding performance can be improved.

The following configuration is preferable as an embodiment of the present invention.
The shell side end may be configured to rise radially outward from the shell body, and the shell body and the fixed piece may be connected in a stepped shape.
According to such a structure, since the contact area with respect to the electroconductive material of a shell side edge part can be enlarged, a shield performance can be improved.

A conductive material is good also as a structure stuck through the conductive adhesive material with respect to either one of a shell side edge part and a case side edge part. In addition, as a conductive adhesive material, the adhesive tape which has a conductive acrylic as a main component can be used, for example.
According to such a configuration, since the conductive material can be attached in advance to one of the shell side end and the case side end, the conductive material can be used when the shield connector is attached to the mounting portion. It does not have to be held by hand, and the installation work becomes easy.

The conductive material may have a cushioning property.
If comprised in this way, since an electroconductive material is connected along the surface shape of a case side edge part, the surface of a case side edge part can be connected so that conduction | electrical_connection does not carry out mirror surface processing.

The conductive material may be composed of conductive polyethylene.
As the conductive material, for example, a configuration in which an elastic member is covered with a braided wire may be considered. In that respect, according to the above configuration, since the conductive material can be configured only with conductive polyethylene, the conductive material can be easily formed.

  According to the present invention, the shielding performance can be improved.

Plan view of shield connector of embodiment Side view of shield connector Front view of shield connector Rear view of shield connector AA line sectional view in FIG. BB sectional view in FIG. Sectional view showing the state where the shield connector is fixed to the mounting part The principal part expanded sectional view in FIG. The principal part expanded sectional view in FIG.

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the shield connector 10 according to the present embodiment shields a synthetic resin housing 20, a plurality of terminal fittings 30 attached to the housing 20, a shield shell 40 covering the outer surface of the housing 20, and a braided wire H. A caulking ring 50 that caulks to the shell 40 is provided. In the following description, the front-rear direction is based on the mounting direction of the shield connector 10 with respect to the mounting portion 60, and the fitting surface side is the front side.

  The shield connector 10 is attached to a metal device-side case, and is attached to the outer surface of the device-side case in the form of a hood and protruding in the front-rear direction as shown on the right side of FIG. A portion 60 is provided. An attachment hole 62 penetrating in the front-rear direction is formed inside the attachment portion 60. A fixing hole 61 for fixing the bolt 70 is formed through the upper portion of the mounting portion 60, and a female screw is formed on the inner peripheral surface of the fixing hole 61. Therefore, as shown in FIG. 7, the shield connector 10 is attached and fixed to the attachment portion 60 by tightening the bolt 70 with respect to the fixing hole 61 from the vertical direction (direction orthogonal to the front-rear direction).

  The housing 20 has a horizontally long flat shape as shown in FIGS. 1 to 4, and a cavity 21 penetrating in the front-rear direction is formed inside the housing 20 as shown in FIGS. Yes. A terminal fitting 30 can be inserted into the cavity 21 from behind. Inside the cavity 21 is formed a lance 22 that is cantilevered and protrudes forward. Further, a rubber plug 80 is attached to the rear portion of the cavity 21 to waterproof between the inner peripheral surface of the cavity 21 and the outer peripheral surface of the electric wire W. The rubber stopper 80 is prevented from coming out backward by a back retainer 90 disposed in contact with the rear surface portion of the rubber stopper 80.

  The back retainer 90 is attached to the rear portion of the housing 20 and is configured by assembling a pair of halves as shown in FIG. As shown in FIG. 6, a pair of retaining protrusions 91 are provided for each rubber plug 80 on both the upper and lower sides of the back retainer 90. On the other hand, on both the upper and lower sides of the back retainer 90 at the rear portion of the housing 20, a pair of retaining holes 91 are formed which are engaged with both retaining projections 91 in the front and rear direction. When the both retaining protrusions 91 are engaged with the both retaining holes 23, the backward movement of the back retainer 90 is restricted.

  The terminal fitting 30 includes a terminal connection portion 31 having a flat plate shape and a wire connection portion 32 connected to the end of the electric wire W. The terminal connection portion 31 is configured to protrude forward from the front end portion of the housing 20. A connection hole 34 that is bolted to a terminal block (not shown) on the device side is formed through the front end portion of the terminal connection portion 31, and a lance 22 is engaged with the rear end portion of the terminal connection portion 31. A lance locking hole 33 for stopping is formed through. When the lance 22 is locked in the lance locking hole 33, the terminal fitting 30 is prevented from coming off backward. The electric wire connection part 32 has a pair of barrel pieces, and the electric wire W and the terminal fitting 30 are connected so as to be conductive by caulking the core wire of the electric wire W with both barrel pieces.

  The terminal accommodating portion 24 that covers the terminal connecting portion 31 in the housing 20 can be fitted into the mounting hole 62. As shown in FIG. 3, the terminal accommodating portion 24 has a horizontally long elliptical shape in which a plurality of terminal connecting portions 31 are arranged side by side. On the other hand, as shown in FIG. 4, the electric wire accommodating portion 25 that covers the electric wire connecting portion 32 and the end of the electric wire W in the housing 20 is individually formed for each electric wire W. The shield shell 40 is mounted in a covering form.

  A mounting groove 27 is provided around the outer peripheral surface of the terminal accommodating portion 24, and a seal ring 81 is fitted into the mounting groove 27. When the terminal accommodating portion 24 is fitted into the mounting hole 62, the seal ring 81 is in close contact with both the outer peripheral surface of the mounting groove 27 and the inner peripheral surface of the mounting hole 62 as shown in FIG. Is waterproof.

  As shown in FIG. 6, the shield shell 40 includes a cylindrical shell main body 41 that collectively covers the plurality of electric wire receiving portions 25, and a standing wall portion 42 that rises radially outward from the front end peripheral edge of the shell main body 41. Configured. As shown in FIG. 4, a plurality of retaining pieces 28 are engaged with the rear end opening edge of the shell body 41, and these retaining pieces 28 are adjacent to the electric wire accommodating portions 25 on both the upper and lower sides of the housing 20. It is provided between. Since the retaining piece 28 is locked to the edge of the opening of the rear end of the shell body 41, the shell body 41 is held in a state in which the shell body 41 is prevented from being pulled backward with respect to the housing 20. The shield shell 40 is formed by pressing an iron metal flat plate, and the shell body 41 is formed by drawing the standing wall portion 42.

  A plurality of electric wires W are drawn out to the rear in each of the plurality of electric wire accommodating portions 25, and a braided wire H is provided so as to collectively cover the conductive paths made of these electric wires W. As shown in FIG. 6, the front end portion of the braided wire H is crimped and fixed on the outer peripheral surface of the shell body 41 by a caulking ring 50. By crimping the caulking ring 50 against the outer peripheral surface of the shell main body 41, the braided wire H is sandwiched between the caulking ring 50 and the shell main body 41, and the braided wire H and the shield shell 40 are connected to be conductive. .

  As shown in FIG. 3, a pair of fixing pieces 44 are provided on both sides in the width direction of the upper edge portion of the standing wall portion 42. The fixed piece 44 protrudes forward with respect to the standing wall portion 42, whereas the shell body 41 protrudes rearward with respect to the standing wall portion 42. That is, the shell body 40 and the fixed piece 44 are connected in a stepped manner via the standing wall portion 42. The fixed piece 44 is formed by bending the standing wall portion 42.

  As shown in FIG. 1, both the fixing pieces 44 are configured to project forward with a predetermined interval in the width direction, and an insertion hole 45 is formed through the fixing piece 44. The insertion hole 45 is formed slightly larger than the fixing hole 61. Therefore, even when the axial center position of the fixing hole 61 and the axial center position of the insertion hole 45 are deviated within a predetermined tolerance range, the bolt 70 can be inserted into the insertion hole 45 and bolted to the fixing hole 61. It has become.

  Now, at a position corresponding to the outer periphery of the terminal accommodating portion 24 on the front surface of the standing wall portion 42, as shown in FIG. Specifically, as shown in FIG. 8, the conductive cushion 100 is adhered to the front surface of the standing wall portion 42 by a conductive adhesive sheet 101. The conductive cushion 100 is made of conductive polyethylene and has cushioning properties.

  In a state where the shield connector 10 is attached and fixed to the attachment portion 60, the conductive cushion 100 is sandwiched between the standing wall portion 42 and the distal end portion of the attachment portion 60 as shown in FIG. 9. The conductive cushion 100 and the conductive adhesive sheet 101 are both conductive, and the standing wall portion 42 and the tip of the mounting portion 60 are connected to be conductive by the conductive cushion 100 and the conductive adhesive sheet 101. The In addition, the facing portion where the standing wall portion 42 and the tip portion of the attachment portion 60 face each other is continuously formed without any gap by the conductive cushion 100 and the conductive adhesive sheet 101. The standing wall portion 42 corresponds to the “case side end portion” of the present invention, and the tip portion of the mounting portion 60 corresponds to the “shell side end portion” of the present invention.

  The thickness of the conductive cushion 100 is set to such an extent that the play due to the difference in the shapes of the fixing hole 61 and the insertion hole 45 can be absorbed. That is, even when the shield shell 40 is fixed to the mounting portion 60 in a state where the standing wall portion 42 and the distal end portion of the mounting portion 60 are farthest from each other, a conductive cushion is provided between the standing wall portion 42 and the distal end portion of the mounting portion 60. 100 is set to be embedded. For this reason, since a gap is not formed in the range from the standing wall portion 42 to the attachment portion 60 regardless of the attachment state of the shield shell 40, the shield performance can be improved. In this embodiment, although the conductive cushion 100 having a thickness of about 1 mm is used and the conductive adhesive sheet 101 having a thickness of about 35 μm is used, these thicknesses can be appropriately changed according to the product shape.

  The present embodiment is configured as described above, and subsequently, a method of assembling the shield connector 10 will be described. In order to attach the shield connector 10 to the attachment portion 60, the terminal accommodating portion 24 is fitted into the attachment hole 62. When the terminal accommodating portion 24 is fitted to the mounting hole 62 at a normal depth, the bolt 70 is passed through the insertion hole 45 and tightened into the fixing hole 61. When the tightening of the bolt 70 is completed, the shield shell 40 is fixed to the mounting portion 60. At this time, the conductive cushion 100 and the conductive adhesive sheet 101 are sandwiched between the standing wall portion 42 and the distal end portion of the attachment portion 60 so that the standing wall portion 42 and the distal end portion of the attachment portion 60 are connected to each other. Thereby, the range from the standing wall part 42 to the attachment part 60 is formed without a gap, and the conductive cushion 100 is grounded to the standing wall part 42 via the conductive adhesive sheet 101 and to the attachment part 60. Connected to ground. Therefore, the shielding performance can be improved.

  As described above, in the present embodiment, the conductive cushion 100 can connect the standing wall portion 42 and the distal end portion of the attachment portion 60 without a gap, and the conductive cushion 100 can be connected to the standing wall portion 42 and the distal end portion of the attachment portion 60. Can be connected to the ground. In addition, since the conductive cushion 100 is connected to the standing wall portion 42, the contact area between the standing wall portion 42 and the conductive cushion 100 can be increased. In addition, since the conductive cushion 100 is attached to the standing wall portion 42 with the conductive adhesive sheet 101, the work of attaching the shield connector 10 to the attachment portion 60 is facilitated. In addition, since the conductive cushion 100 having cushioning properties is employed, the contact area between the conductive cushion 100 and the front end portion of the mounting portion 60 can be increased without performing a mirror finish on the front end portion of the mounting portion 60. Moreover, since the conductive cushion 100 made of conductive polyethylene is employed, the conductive material can be easily formed.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the conductive cushion 100 is connected to the standing wall portion 42 so as to be conductive in the above embodiment, according to the present invention, in the case of the shield shell 40 that does not include the standing wall portion 42, the front end of the shell body 41 You may connect the conductive cushion 100 to a part so that conduction | electrical_connection is possible.
(2) Although the conductive cushion 100 is attached to the standing wall portion 42 via the conductive adhesive sheet 101 in the above embodiment, the conductive cushion 100 is attached via the conductive adhesive sheet 101 according to the present invention. It may be affixed to the tip of the part 60.

(3) Although the conductive cushion 100 having cushioning properties is used in the above embodiment, according to the present invention, a conductive material that is plastically deformed by being sandwiched between the standing wall portion 42 and the tip portion of the mounting portion 60 is used. May be used.
(4) Although the conductive cushion 100 made of conductive polyethylene is used in the above embodiment, according to the present invention, conductive polypropylene, conductive rubber, or the like may be used as the conductive material.

(5) Although the shield connector 10 provided with the terminal fitting 30 is illustrated in the above embodiment, the present invention may be applied to a cap not provided with the terminal fitting 30.
(6) In the above embodiment, the terminal accommodating portion 24 is fitted in the mounting hole 62. However, according to the present invention, the terminal accommodating portion 24 may be fitted on the mounting portion 60.

DESCRIPTION OF SYMBOLS 10 ... Shield connector 20 ... Housing 41 ... Shell main body 42 ... Standing wall part (shell side edge part)
60 ... Mounting part 70 ... Bolt 100 ... Conductive cushion (conductive material)
101 ... Conductive adhesive sheet

Claims (5)

A shield connector connected to a mounting portion provided to protrude from the outer surface of a metal case in the form of a hood,
A housing;
A metal shell body that forms a cylindrical shape covering the outer surface of the housing;
A metal fixing piece that is integrally provided with the shell body and is bolted from a direction intersecting a protruding direction of the mounting portion with respect to an outer peripheral surface of the mounting portion;
It is sandwiched between the shell side end on the mounting portion side of the shell main body and the case side end on the shell main body side of the mounting portion, so that the shell side end and the case side end can be electrically connected. A shielded connector comprising a conductive material.   2. The shield connector according to claim 1, wherein the shell side end portion is configured to rise radially outward from the shell main body, and connects the shell main body and the fixing piece in a stepped shape.   The said electroconductive material is affixed through the electroconductive adhesive material with respect to either one of the said shell side edge part and the said case side edge part, The Claim 1 or Claim 2 characterized by the above-mentioned. Shield connector.   The shield connector according to any one of claims 1 to 3, wherein the conductive material has a cushioning property.   The shield connector according to claim 1, wherein the conductive material is made of conductive polyethylene.

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