JP2022138478A - shield connector - Google Patents

Abstract

To disclose a shield connector with a new structure which can achieve downsizing of the shield connector without impairing accessibility of an elastic contact piece with a ground member.SOLUTION: A shield connector 10 includes a terminal fitting 16, an inner housing 18, a shield shell 20, and an outer housing 22. The shield shell 20 has elastic contact pieces 46 which contact with a ground member 14 provided at an electric device 12. Each elastic contact piece 46 protrudes to one axial side of the shield shell 20 in a cantilever manner and has a contact part 48, which is placed in pressure contact with the ground member 14 of the electric device 12, at the tip side of the elastic contact piece 46. At one side of the shield shell 20, a pair of slits 54, 54 which are located at both sides of the elastic contact piece 46 and extend to the front of the shield shell 20 is provided in a circumferential direction of the shield shell 20. The base end side of the elastic contact piece 46 is disposed between the pair of slits 54, 54.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to shielded connectors.

Patent Literature 1 discloses a shield connector attached to an electrical device. This shield connector includes terminal fittings, an inner housing that accommodates the terminal fittings, a shield shell that surrounds the inner housing, and an outer housing that accommodates the inner housing and the shield shell. The shield shell has an elastic contact piece that contacts a ground member provided on the electrical equipment to which it is attached. Thereby, in the shield connector, electromagnetic radiation can be suppressed by the shield shell. In the shield connector of Patent Document 1, the elastic contact piece is provided in a cantilevered manner at the rear end of the seal shell, and the contact portion on the tip side of the elastic contact piece functions as a free end to provide an elastic contact. The piece is pressed against the ground member while bending in the thickness direction. Therefore, the elastic restoring force of the elastic contact piece improves the contactability of the elastic contact piece with the ground member.

JP 2012-104415 A

In the shield connector of Patent Document 1, in order to ensure the pressure contact force of the elastic contact piece, it is necessary to ensure a certain length of protrusion of the elastic contact piece from the rear end of the shield shell. There is a limit to miniaturization. Therefore, there has been a demand for an improvement to reduce the size of the shield connector without impairing the contactability of the elastic contact piece to the ground member.

Therefore, a shield connector with a novel structure is disclosed, which can be miniaturized without impairing the contactability of the elastic contact piece to the ground member.

A shield connector of the present disclosure is a shield connector to be attached to an electrical device, and includes terminal fittings, an inner housing that accommodates the terminal fittings, a tubular shield shell that surrounds the outer periphery of the inner housing, and the inner housing. a housing and an outer housing that accommodates the shield shell, the shield shell having an elastic contact piece that contacts a ground member provided in the electric device, the elastic contact piece extending along the axis of the shield shell. a contact portion protruding in one direction in a cantilevered manner, and a contact portion that is pressed against the ground member of the electric device while being bent in a thickness direction of the elastic contact piece on a tip end side of the elastic contact piece; The one side of the shield shell is provided with a pair of slits positioned on both sides of the elastic contact piece in the circumferential direction of the shield shell and extending forward of the shield shell. A shield connector having a base end disposed between the pair of slits.

According to the shield connector of the present disclosure, it is possible to reduce the size of the shield connector without impairing the contact of the elastic contact piece to the ground member.

FIG. 1 is a front view showing a shield connector according to Embodiment 1. FIG. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 3 is an exploded perspective view of FIG. 1. FIG.

<Description of Embodiments of the Present Disclosure>
First, the embodiments of the present disclosure are listed and described.
The shielded connector of the present disclosure provides:
(1) A shield connector to be attached to an electrical device, comprising terminal fittings, an inner housing for accommodating the terminal fittings, a cylindrical shield shell surrounding the outer circumference of the inner housing, the inner housing and the shield. an outer housing that accommodates a shell, wherein the shield shell has an elastic contact piece that contacts a ground member provided in the electric device, and the elastic contact piece is provided on one axial side of the shield shell. and a contact portion that is pressed against the ground member of the electric device while being bent in the thickness direction of the elastic contact piece on the distal end side of the elastic contact piece, and the shield shell has the On one side of the shield shell, a pair of slits are provided on both sides of the elastic contact piece in the circumferential direction of the shield shell and extend forward of the shield shell. A shield connector is arranged between the pair of slits.

According to the shield connector of the present disclosure, the rear end side of the shield shell is provided with a pair of slits extending forward of the shield shell on both sides of the elastic contact piece in the circumferential direction of the shield shell, A base end side of the elastic contact piece is arranged between the pair of slits. That is, in the conventional structure, the elastic contact piece protrudes from the rear end of the shield shell in the axial direction. In the connector of the present disclosure, by providing the pair of slits on the rear end side of the shield shell, the portion located between the pair of slits can be the base end side of the elastic contact piece. As a result, the connection position of the elastic contact piece with respect to the shield shell can be shifted to the other side of the shield shell, and the length of the elastic contact piece can be secured while reducing the projecting dimension from the rear end side of the shield shell. can do. As a result, the projecting dimension of the elastic contact piece from the rear end side of the shield shell is reduced while securing the necessary contact pressure against the ground member by securing the deflection amount in the thickness direction of the elastic contact piece, thereby Also, the size of the shield connector can be reduced.

(2) The distal end side of the elastic contact piece is bent radially outwardly of the shield shell, and the other side of the shield shell in the axial direction on the distal end side of the first bent portion. a second bent portion that is bent to the side, and the outer surface of the second bent portion constitutes the contact portion to the ground member superimposed in the axial direction of the shield shell. preferable. Since the second bent portion constituting the contact portion is provided in addition to the first bent portion, the amount of bending of the first bent portion can be secured in addition to the amount of bending of the distal end side of the elastic contact piece. , the contact pressure of the elastic contact piece against the ground member can be further improved. Furthermore, since the second bent portion is provided by bending the tip side of the elastic contact piece toward the other side in the axial direction of the shield shell, it is possible to further reduce the size of the shield shell and the shield connector in the axial direction. can.

(3) It is preferable that the plurality of elastic contact pieces be provided at a plurality of locations separated from each other in the circumferential direction of the shield shell. A plurality of elastic contact pieces can be distributed at a plurality of positions in the circumferential direction of the shield shell, and the contact area of the shield shell with the ground member can be increased while equalizing the rigidity of the shield shell. As a result, long-term stabilization of the shield performance of the shield connector can be achieved.

<Details of the embodiment of the present disclosure>
A specific example of the shield connector of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

<Embodiment 1>
A shield connector 10 according to a first embodiment of the present disclosure will be described below with reference to FIGS. 1 to 3. FIG. As shown in FIG. 2, the shield connector 10 is attached to an electric device 12 by being fixed to a housing 14 or the like that is a ground member of the electric device 12 such as an inverter. Although the shield connector 10 can be arranged in any direction, the vertical direction, the horizontal direction, and the front-rear direction will be described below with reference to the vertical direction, the horizontal direction, and the front-rear direction shown in the drawing. Further, with respect to a plurality of identical members, only some members are given reference numerals, and the reference numerals are omitted for other members.

<Shield connector 10>
As shown in FIG. 2, the shield connector 10 includes a pair of terminal fittings 16, 16 and a cylindrical inner housing 18 made of synthetic resin for accommodating the pair of terminal fittings 16, 16. As shown in FIG. As shown in FIGS. 2 and 3, the outer periphery of the inner housing 18 on the front side is surrounded by a cylindrical shield shell 20 made of metal. The front side of the inner housing 18 and the shield shell 20 are housed in a cylindrical outer housing 22 made of synthetic resin.

<Inner housing 18>
As shown in FIGS. 1 to 3, the inner housing 18 is formed with a pair of cylindrical portions 24, 24 which are open in the front-rear direction and which are spaced apart in the vertical direction. A bottom wall 26 is formed on each of the inner surfaces of the central portions in the front-rear direction of the pair of cylindrical portions 24 , 24 . On the front side of the bottom wall 26, engagement projections 28 projecting forward are provided at mutually separated positions. In addition, a recess 30 having a circular cross section is provided in the central portion of the rear side of the bottom wall 26 . In the recess 30, a synthetic resin tubular member 32 is attached to the distal end of the bent portion in the central portion of the pair of terminal fittings 16, 16, and a rubber rubber member is attached to the outer peripheral surface of the tubular member 32. A seal member 34 is accommodated. As a result, the pair of terminal fittings 16, 16 are positioned in the front-rear direction, and water or the like is prevented from entering the electric device 12 from the front side. The bottom surface of the recess 30 is provided with a terminal fitting insertion hole 36 penetrating in the front-rear direction. On the other hand, on the front side of the bottom wall 26, a connection assisting member 37 made of synthetic resin is arranged for assisting the electrical connection between the tips of the pair of terminal fittings 16, 16 and the mating terminals (not shown). It is By inserting the mating terminal (not shown) from the front side into the connection auxiliary member 37 in which the tip of the terminal fitting 16 is arranged, the terminal fitting 16 and the mating terminal connected to the end of the shield wire (not shown) are connected. It is designed to be electrically connected. The auxiliary connection member 37 is aligned in the circumferential direction by engaging with an engaging projection 28 provided on the bottom wall 26 .

<Outer housing 22>
As shown in FIGS. 1 to 3, the fixing portion 38 is formed by extending the bottom wall 26 of the inner housing 18 vertically and horizontally. At the four corners of the fixed portion 38, bolt insertion holes 40 are provided through the plate thickness direction. The outer housing 22 protrudes forward from the fixing portion 38 in a cylindrical shape, is positioned radially outward of the inner housing 18 and is configured to open forward. A bottom wall extending portion 42 extending from the bottom wall 26 of the inner housing 18 to the outer housing 22 has an annular shape, and is provided with a large number of elastic contact piece insertion holes 44 spaced apart in the circumferential direction through the plate thickness direction. ing. A shield shell 20 is attached to the outer peripheral surface of the front inner housing 18 in which the outer housing 22 is formed.

<Shield shell 20>
The shield shell 20 has conductivity and is made of various metal materials that can be pressed or punched, such as brass, copper, copper alloys, aluminum, aluminum alloys, and the like. As shown in FIG. 3, the shield shell 20 has a rectangular tubular shape that opens in the front-rear direction. Six pairs of elastic contact pieces 46, 46 are spaced apart in the circumferential direction from one end of the shield shell 20 on the rear side in the axial direction and protrude rearward in a cantilever manner. As shown in FIG. 2 , the rearmost projecting portion of the elastic contact piece 46 is in contact with the housing 14 , which is the ground member of the electrical device 12 . That is, as indicated by a phantom line in FIG. 2, a contact portion 48 is provided on the distal end side of the elastic contact piece 46 and press-contacts with the housing 14 while bending in the thickness direction of the elastic contact piece 46 . More specifically, as shown in FIGS. 2 and 3 , the tip side of the elastic contact piece 46 has a first bent portion 50 bent radially outward of the shield shell 20 and a It has a second bent portion 52 bent toward the front side, which is the other side in the axial direction of the shield shell 20, on the tip side. The outer surface of the second bent portion 52 constitutes a contact portion 48 to the housing 14 , which is a ground member that is overlapped in the longitudinal direction, which is the axial direction of the shield shell 20 .

As shown in FIG. 3 , at the rear end of the shield shell 20 , which is one side in the axial direction, are located on both sides of the elastic contact pieces 46 in the circumferential direction of the shield shell 20 and forward of the shield shell 20 . A pair of slits 54, 54 are provided extending toward the . That is, the base end side of each elastic contact piece 46 is arranged between the pair of slits 54 , 54 . Further, an engaging portion 56 projecting rearward in a cantilever manner is formed by a slit 54 between the base ends of a pair of elastic contact pieces 46, 46 adjacent in the circumferential direction. The shield shell 20 is fixed to the inner housing 18 by fitting the engaging projections 60 provided on the outer peripheral surface of the inner housing 18 into the engaging holes 58 provided in the engaging portion 56 . . In addition, as shown in FIG. 3, an engaging piece 62 projecting forward and inward in a cantilever manner is formed on the front side of each elastic contact piece 46 in the shield shell 20 . As shown in FIG. 2 , a step 64 is formed on the outer peripheral surface of the inner housing 18 . The shield shell 20 is prevented from coming off by engaging the tip of the engaging piece 62 with the step 64 . In addition, an elastic contact piece 66 is formed on the front end side of the shield shell 20 so as to protrude rearward and outward in an inverted U-shape in a cantilevered manner. The elastic contact piece 66 is electrically connected by coming into contact with a ground member of a mating connector connected to a shield member of a shield wire (not shown).

<Terminal fitting 16>
As shown in FIG. 2, the terminal fitting 16 is formed by bending a lower end portion of a strip-shaped metal member into an L shape. A base end portion of the terminal fitting 16 is arranged so as to be exposed at a rear end portion of the inner housing 18 .

According to the shield connector 10 of the present disclosure having such a structure, the rear end portion of the shield shell 20 is positioned on both sides of each elastic contact piece 46 in the circumferential direction of the shield shell 20 . A pair of slits 54, 54 extending toward the front of the is provided. That is, the base end side of each elastic contact piece 46 is arranged between the pair of slits 54 , 54 . As a result, compared to the conventional elastic contact piece protruding from the rear end of the shield shell, the portion located between the pair of slits 54, 54 can be the base end side of the elastic contact piece 46. can. Therefore, in the shield connector 10 of the present disclosure, the connection position of the elastic contact piece 46 with respect to the shield shell 20 can be shifted to the front side of the shield shell 20, and the length dimension of the elastic contact piece 46 is ensured while the shield The projecting dimension from the rear end side of the shell 20 can be reduced. That is, it is possible to reduce the projecting dimension of the elastic contact piece 46 from the rear end side of the shield shell 20 while ensuring the necessary contact pressure against the housing 14 by ensuring the amount of bending of the elastic contact piece 46 in the thickness direction. , the size of the shield shell 20 and the shield connector 10 can be reduced. In addition, since the elastic contact pieces 46 are distributed at 12 points in the circumferential direction of the shield shell 20, the contact area of the shield shell 20 with the housing 14 is increased while equalizing the rigidity of the shield shell 20. can be achieved. Therefore, long-term stabilization of the shield performance of the shield connector 10 can be achieved.

Further, since the second bent portion 52 having the contact portion 48 is provided in addition to the first bent portion 50 , the amount of bending of the first bent portion 50 can be ensured in addition to the amount of bending of the contact portion 48 . Therefore, it is possible to further improve the contact pressure of the elastic contact piece 46 against the housing 14 . Moreover, since the tip side of the elastic contact piece 46 is bent toward the other side of the shield shell 20 in the axial direction to form the second bent portion 52, the shield shell 20 and the shield connector 10 can be further miniaturized in the axial direction. can be planned.

<Modification>
As described above, Embodiment 1 has been described in detail as a specific example of the present disclosure, but the present disclosure is not limited by this specific description. Modifications, improvements, etc. within the scope that can achieve the purpose of the present disclosure are included in the present disclosure. For example, the following modifications of the embodiment are also included in the technical scope of the present disclosure.
(1) In Embodiment 1, the second bent portion 52 is provided in addition to the first bent portion 50, but the first bent portion 50 may be omitted. Any shape can be adopted as the shape of the contact portion 48 as long as it can contact the housing 14 .

10 shield connector 12 electric device 14 housing (ground member)
16 Terminal fitting 18 Inner housing 20 Shield shell 22 Outer housing 24 Cylindrical portion 26 Bottom wall 28 Engagement protrusion 30 Recess 32 Cylindrical member 34 Sealing member 36 Terminal fitting insertion hole 37 Connection auxiliary member 38 Fixing portion 40 Bolt insertion hole 42 Bottom wall extending portion 44 Elastic contact piece insertion hole 46 Elastic contact piece 48 Contact portion 50 First bent portion 52 Second bent portion 54 Slit 56 Engagement portion 58 Engagement hole 60 Engagement protrusion 62 Engagement piece 64 Step 66 Elasticity contact piece

Claims (3)

A shield connector attached to an electrical device,
a terminal fitting;
an inner housing that accommodates the terminal fitting;
a cylindrical shield shell surrounding the outer periphery of the inner housing;
an outer housing that accommodates the inner housing and the shield shell,
The shield shell has an elastic contact piece that contacts a ground member provided in the electrical device,
The elastic contact piece protrudes in a cantilevered manner on one side of the shield shell in the axial direction. has a contact portion that is press-contacted to
The one side of the shield shell is provided with a pair of slits positioned on both sides of the elastic contact piece in the circumferential direction of the shield shell and extending forward of the shield shell. a proximal end of the shield connector disposed between the pair of slits. The distal end side of the elastic contact piece is bent toward the other side of the shield shell in the axial direction at a first bent portion that is bent outward in the radial direction of the shield shell and on the distal end side of the first bent portion. having a second bend,
2. The shield connector according to claim 1, wherein the outer surface of said second bent portion constitutes said contact portion to said ground member superimposed in said axial direction of said shield shell. 3. The shield connector according to claim 1, wherein a plurality of said elastic contact pieces are provided at a plurality of locations separated from each other in said circumferential direction of said shield shell.

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