JP2011060451A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield connector with shield performance improved. <P>SOLUTION: The shield connector 10, connected to a mounting portion 60 protruded into an outer surface of a metal case and integrally fitted with the case, is provided with a housing 20, a metal shield shell 40 having a tubular shape for covering an outer surface of the housing 20 over a whole peripheral direction, and fastened to the outer surface of the case with a bolt 70, and a metal expansion shell 46 having a tubular shape for covering an opposing part where the shield shell 40 and the mounting portion 60 are opposed to each other over a whole peripheral direction, and conduction-connected with at least either the shield shell 40 or the case. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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 connected to a mounting portion provided in a metal case, which has a cylindrical shape covering a housing and an outer surface of the housing, and is a metal shield shell that is bolted to the mounting portion. And an extension part made of metal that is provided on one of the attachment part and the shield shell and covers a facing part in which the end part on the attachment part side of the shield shell and the end part on the shield shell side of the attachment part face each other. It is characterized by having a configuration provided.

  According to such a configuration, the shield shell and the expansion shell are connected to the attachment portion so as to be conductive by bolting the shield shell to the attachment portion. Here, depending on the state of attachment of the shield shell, a gap may be formed at the facing portion where the end of the shield shell on the attachment portion side and the end of the attachment portion on the shield shell side face each other. Even in that case, since the gap is covered with the expansion shell, the shielding performance can be improved.

The following configuration is preferable as an embodiment of the present invention.
The attachment portion may be provided so as to protrude from the outer surface of the case in a hood shape, and the housing may be fitted inside the attachment portion, while the expansion shell may be configured to cover the outer periphery of the front end of the attachment portion.
According to such a configuration, the outer periphery of the front end of the attachment portion can be covered with the expansion shell by fitting the housing inside the attachment portion.

The expansion shell may be made of aluminum die cast, and may be formed integrally with the shield shell.
According to such a configuration, the expansion shell and the shield shell can be formed without a gap, and the shield performance can be further improved.

The expansion shell may be configured to be connected to both the shield shell and the attachment portion so as to be conductive.
According to such a configuration, since the expansion shell is grounded to both the shield shell and the attachment portion, the shield performance can be further improved.

  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.

<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 or the like for caulking 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. On the outer surface of the device-side case, as shown on the right side of FIG. 6, a mounting portion 60 protruding in a hood shape is provided. 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 into the fixing hole 61.

  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-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. As shown in FIG. 6, a flange portion 26 is provided between the terminal housing portion 24 and the wire housing portion 25 so as to project radially outward along a plane orthogonal to the front-rear direction.

  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 accommodating 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.

  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 caulked by a caulking ring 50 on the outer peripheral surface of the shell main body 41. A press-fitting groove 43 having a slightly curved shape is provided on the outer peripheral surface of the shell body 41. By crimping the caulking ring 50 against the press-fitting groove 43, the braided wire H is connected to the caulking ring 50 and the shell main body. The braided wire H and the shield shell 40 are connected so as to be conductive.

  As shown in FIG. 4, 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. 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, an expansion shell 46 is formed on the front surface of the standing wall portion 42 so as to project forward. The expansion shell 46 is made of aluminum die cast and is formed integrally with the shield shell 40. As shown in FIG. 3, the expansion shell 46 has a horizontally long elliptical shape that is slightly larger than the outer peripheral surface of the terminal accommodating portion 24, and has a cylindrical shape that covers the terminal accommodating portion 24 over the entire circumferential direction. It is erected on the standing wall 42.

  As shown in FIGS. 5 and 6, the position of the expansion shell 46 in the front-rear direction is a position where the standing wall portion 42 and the tip of the attachment portion 60 cover the opposing portion facing the front-rear direction from the outside in the radial direction. In other words, the expansion shell 46 disposed on the outer side in the radial direction of the attachment portion 60 wraps in the front-rear direction with the distal end portion of the attachment portion 60. The lapping allowance 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 with the standing wall portion 42 and the distal end portion of the mounting portion 60 being farthest apart, the expansion shell 46 and the distal end portion of the mounting portion 60 wrap in the front-rear direction. Is set to 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.

  Further, the standing wall portion 42 is formed with a recess 47 for accommodating the flange portion 26. The flange portion 26 accommodated in the recess 47 is disposed between the bottom surface of the recess 47 and the attachment portion 60. As shown in FIG. 8, the depth dimension of the recess 47 is slightly smaller than the plate thickness of the flange portion 26. Thereby, the attachment part 60 can contact the outer peripheral edge part 48 of the recessed part 47 in the standing wall part 42. When the outer peripheral edge portion 48 and the attachment portion 60 are in contact with each other, the shield shell 40 and the device-side case are connected so as to be conductive except for the fixed piece 44, so that the shielding performance can be further improved.

  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, as shown in FIG. 6, the outer periphery of the front end of the attachment portion 60 is covered over the entire circumferential direction by the expansion shell 46, so that the shielding performance can be improved.

  As described above, in the present embodiment, since the extended shell 46 of the shield shell 40 is provided, since the standing wall portion 42 and the mounting portion 60 can cover the opposing portion facing in the front-rear direction over the entire circumferential direction, the shielding performance. Can be improved. Further, since the expansion shell 46 is formed integrally with the standing wall portion 42, no gap is formed between them, and the shielding performance can be further improved. Moreover, since the front-end | tip part of the attaching part 60 was made to contact the outer peripheral part 48 of the recessed part 47, a shield performance can be improved further.

<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 expansion shell 46 is formed integrally with the shield shell 40 in the above embodiment, the expansion shell may be formed integrally with the mounting portion 60 according to the present invention. Further, the expansion shell may be formed separately from the shield shell 40 and the attachment portion 60, and the expansion shell may be fixed to either the shield shell 40 or the attachment portion 60.

(2) In the above embodiment, the terminal housing portion 24 is fitted into the mounting hole 62. However, according to the present invention, the terminal housing portion 24 may be fitted onto the mounting portion 60.
(3) Although the expansion shell 46 is made of aluminum die cast in the above embodiment, according to the present invention, the expansion shell can be formed by drawing a metal plate material, and the expansion shell can be conducted to the shield shell 40. You may connect to.

(4) In the above embodiment, the expansion shell 46 is in contact with the outer peripheral edge 48 of the recess 47, but the expansion shell 46 is not in contact with the outer peripheral edge 48 of the recess 47.
(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.

DESCRIPTION OF SYMBOLS 10 ... Shield connector 20 ... Housing 40 ... Shield shell 43 ... Standing wall part (end part by the side of the attachment part in a shield shell)
46 ... Expansion shell 60 ... Mounting part 70 ... Bolt

Claims (4)

A shield connector connected to a mounting portion provided in a metal case,
A housing;
A cylindrical shape covering the outer surface of the housing, and a metal shield shell that is bolted to the mounting portion;
It is provided in any one of the attachment portion and the shield shell, and is made of a metal that covers a facing portion where the end portion on the attachment portion side of the shield shell and the end portion on the shield shell side of the attachment portion face each other. Shield connector with expansion shell.   The mounting portion is provided so as to protrude from the outer surface of the case in a hood shape, and the housing fits inside the mounting portion, while the expansion shell covers the outer periphery of the front end of the mounting portion. The shield connector according to claim 1, wherein:   The shield connector according to claim 1 or 2, wherein the extension shell is made of aluminum die-casting and is formed integrally with the shield shell.   The shield connector according to any one of claims 1 to 3, wherein the expansion shell is connected to both the shield shell and the attachment portion so as to be conductive.

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