JP4811235B2 - Shield connector - Google Patents

Description

  The present invention relates to a shield connector.

Conventionally, what was described in patent document 1 is known as a shield connector. In this shield connector, a terminal fitting connected to the terminal portion of the conductor of the shielded electric wire is inserted into the housing, and the inner periphery of the cylindrical shield shell assembled in the housing and the outer periphery of the braided wire of the shielded electric wire are connected by a connecting member. The structure is connected so as to be conductive, and the elastic contact piece of the connecting member is in elastic contact with the outer periphery of the braided wire.
JP-A-8-88050

In the shield connector, when a twisting force acts on the shielded wire, the shield wire is inclined around the axis (circumferential direction) in the housing, and accordingly, the terminal fitting fixed to the terminal portion of the shielded wire is provided. An attempt is made to tilt the attitude around the axis in the housing. Such inclination of the posture of the terminal fitting causes excessive stress to the resin lance formed integrally in the housing to prevent the terminal fitting from being pulled out, or the metal terminal fitting damages the inner wall of the housing. Cause it.
This invention is completed based on the above situations, Comprising: It aims at controlling the inclination around the axis line of the shield wire in a housing.

As means for achieving the above object, the invention of claim 1 includes a housing having a cylindrical shield shell, a terminal fitting inserted into the housing in a state of being connected to a conductor of a shielded wire, A metal connection member fixed to the outer periphery of the braided wire of the shielded electric wire, and a connection piece is formed on one of the connection member and the shield shell, and the other is In the shield connector in which a pair of contact portions sandwiching the connection piece in the circumferential direction is formed , the shield shell or the connection member includes a pair of side plates and a connection plate that couples the pair of side plates by knocking out. And the inner surfaces of the pair of side plates serve as the pair of contact portions, and the connection piece is in contact with the connection plate in the radial direction .

<Invention of Claim 1>
Since the pair of contact portions sandwich the connection piece in the circumferential direction, the connection member is restricted from moving in the circumferential direction with respect to the shield shell, so that the terminal fitting is prevented from being tilted around the axis in the housing. The

In addition, since the pair of side plates constituting the contact portion are connected by the connection plate, there is no possibility that the distance between the pair of contact portions is widened, and the reliability of the movement restriction of the connection piece by the pair of contact portions is improved. Are better.

< Reference example >
Hereinafter, a reference example of the present invention will be described with reference to FIGS. The shield connector A of the present reference example includes a housing 10, a shield shell 20, a terminal fitting 30, and a connection member 40.

  The housing 10 is made of synthetic resin, and includes an inner housing 11 having a block shape, an outer housing 12 having a substantially rectangular tube shape that surrounds the rear end side portion of the inner housing 11 and extends rearward from the inner housing 11. A substantially square tubular fitting portion 13 that extends forward from the outer housing 12 so as to surround the inner housing 11 is integrally formed. The inner housing 11 and the outer housing 12 are connected to each other by a connecting portion (not shown) arranged at a distance in the circumferential direction, and the gap between the outer periphery of the inner housing 11 and the inner periphery of the outer housing 12 is a shield shell. This is an assembly space 14 for fitting approximately the first half of 20.

  A pair of left and right cavities 15 having a substantially square cross-sectional shape are formed in the inner housing 11, and lances 16 extending forward along the lower wall of each cavity 15 are formed. The terminal fittings 30 are inserted into the cavities 15 from the rear, and the inserted terminal fittings 30 are prevented from being pulled out by the locking of the lances 16. Of the inner space of the cylindrical portion of the outer housing 12 that extends rearward from the inner housing 11, a substantially first half portion is a housing space 17 for housing the connecting member 40, and a substantially second half portion is a rubber plug. This is a seal space 18 for accommodating 38 holders 39.

  The shield shell 20 is formed by bending a metal plate, and has a generally rectangular tube shape as a whole. A substantially front half portion of the shield shell 20 is inserted into the assembly space 14 from the rear, and is prevented from being pulled backward by locking the retaining piece 21 of the shield shell 20. Direction), left-right direction (width direction), up-down direction, and circumferential direction (rotation direction around the axis) are assembled in a state where movement is restricted. A substantially second half portion of the shield shell 20 is disposed along the inner peripheral surface of the accommodation space 17.

  The upper surface plate 22 of the shield shell 20 is formed with a pair of left and right groove portions 23 in a form in which the rear end edge is notched (opened to the rear end edge). The left and right side edges constituting the groove 23 extend linearly in the front-rear direction (the direction parallel to the insertion direction of the terminal fitting 30 with respect to the cavity 15), and the left and right side edges constitute a pair of contact parts 24a and 24b. is doing. One first contact portion 24 a of the pair of contact portions 24 a and 24 b extends from the front end (back end) of the groove portion 23 to the vicinity of the rear end edge of the shield shell 20, and one side edge of the groove portion 23. Of these, the portion from the rear end of the first contact portion 24a to the rear end edge of the shield shell 20 is a relief portion 25a that is retracted from the groove portion 23 with respect to the first contact portion 24a. The other second contact portion 24b extends linearly in the front-rear direction (parallel to the first contact portion 24a) from the front end of the groove portion 23 to a position ahead of the rear end of the first contact portion 24a. Yes. Of the other side edge of the groove 23, a portion from the rear end of the second contact portion 24 b to the rear end edge of the shield shell 20 is provided with a retaining portion 26 protruding toward the groove 23 with respect to the second contact portion 24 b. The escape portion 25b is formed at the rear end portion of the retaining portion 26 so as to recede so as to correspond to the escape portion 25a of the first contact portion 24a. The width of the groove 23 is narrow at the retaining portion 26 near the entrance (near the rear end). A space between the pair of contact portions 24a and 24b in the groove portion 23 (a space in front of the retaining portion 26) serves as a holding space 27 for holding the connecting piece 44 to be described later. The holding space 27 is open to the outer peripheral side, the inner peripheral side, and the rear side of the shield shell 20. Further, the pair of groove portions 23 are symmetrical to each other.

  The terminal fitting 30 is elongated in the front-rear direction as a whole, the substantially first half portion is a square tube portion 31, and the substantially second half portion is a wire crimping portion 32, and the wire crimping portion 32 has a front end of a shielded wire 33. Are connected. The terminal fitting 30 has its rectangular tube portion 31 fitted in the cavity 15, but there is a clearance between the outer surface of the rectangular tube portion 31 and the inner surface of the cavity 15 to allow smooth insertion of the terminal fitting 30. Therefore, the terminal fitting 30 inserted into the cavity 15 can be tilted slightly obliquely around the axis in the front-rear direction.

  The shielded electric wire 33 is a conductor having a known structure in which a conductor 34 is surrounded by a core 35 made of synthetic resin, a cylindrical braided wire 36 is covered on the outer periphery of the core 35, and the braided wire 36 is surrounded by a sheath 37 made of synthetic resin. It is. At the front end portion of the shielded electric wire 33, the exposed conductor 34 is caulked to the wire barrel of the electric wire crimping portion 32, and the front end portion of the core 35 is caulked to the insulation barrel of the electric wire crimping portion 32. ing. Behind the wire crimping portion 32, the braided wire 36 that is exposed by removing the sheath 37 is folded back to the holder 39 and overlapped on the outer peripheral surface of the sheath 37. The connection member 40 is fixed in a state in which the connection member 40 can be conducted and the relative movement in the circumferential direction is restricted.

The connecting member 40 is formed by bending a substantially square metal plate 41 into a cylindrical shape, and the substantially first half portion is a small diameter portion 42 and the substantially latter half portion is a large diameter portion 43. The small-diameter portion 42 is externally fitted to the braided wire 36 and fixed by caulking. A connecting piece 44 is formed at the joint along the front-rear direction of the large-diameter portion 43. Below, the shaping | molding process and form of the connection piece 44 are demonstrated.
One end edge 45 of the connecting member 40 in the unfolded state is formed with a long and slender projecting piece 46 projecting forward in a cantilevered manner. The connecting piece 44 is formed by turning back and turning the projecting piece 46 to the end edge 45 side and curving it in a substantially S shape. When the metal plate 41 is bent into a cylindrical shape, the connection piece 44 is bent substantially perpendicularly to the outer peripheral side along the fold in the front-rear direction. The connection piece 44 includes an end edge portion 45 that is bent tightly and extends in the front-rear direction, and an elastic contact piece 47 that bends and extends backward from the front end of the end edge portion 45. The edge 45 and the elastic contact piece 47 are arranged so as to face each other in the circumferential direction, and in a free state where the elastic contact piece 47 is not elastically bent, a side surface opposite to the elastic contact piece 47 in the edge 45 The distance from the edge portion 45 to the farthest contact portion in the elastic contact piece 47 is larger than the distance between the pair of contact portions 24a and 24b.

  When the terminal fitting 30 is inserted into the cavity 15 from behind with the connection member 40 secured to the shielded electric wire 33, the connection member 40 is accommodated in the accommodation space 17, and the connection piece 44 is fitted into the groove 23. The At this time, the elastic contact piece 47 passes through the retaining portion 26 while being elastically bent so as to approach the end edge portion 45 side. In a state where the terminal fitting 30 is inserted to the normal position and is prevented from being pulled out by the lance 16, the contact portion 48 is in the holding space 27 due to the elastic restoring force of the elastic contact piece 47 that has passed through the retaining portion 26. While contacting the contact portion 24b in a point contact shape or a radial line contact shape, the end edge portion 45 is in a line contact shape or a surface contact shape in the front-rear direction (axial direction) with respect to the other contact portion 24a. Abut. That is, the connection piece 44 is held in a state of being sandwiched by the pair of contact portions 24a and 24b and is connected to the contact portions 24a and 24b so as to be conductive. The shield shell 20 is connected. Further, the connecting piece 44 abuts the front end of the elastic contact piece 47 against the front end of the groove portion 23 and locks the rear end of the elastic contact piece 47 to the retaining portion 26, thereby causing the shield shell 20 to move in the axial direction. Relative movement is restricted.

As described above, according to the present reference example , the connection piece 44 formed on the connection member 40 is sandwiched in the circumferential direction by the pair of contact portions 24a and 24b formed on the shield shell 20, so that the connection member 40 is shielded. Movement in the circumferential direction with respect to the shell 20 is restricted. As a result, the terminal fitting 30 fixed to the connection member 40 via the shielded electric wire 33 is restricted from tilting around the axis in the housing 10 which is the mounting base of the shield shell 20.

In addition, since the terminal fitting 30 and the connection member 40 are assembled to the housing 10 from the rear, a holding space 27 formed between the pair of contact portions 24a and 24b is opened rearward. When the terminal fitting 30 and the connection member 40 are assembled, it can be visually confirmed from behind that the connection piece 44 is inserted between the pair of contact portions 24a and 24b.
In addition, since the left and right side edges of the groove 23 in the form cut out in the axial direction in the shield shell 20 are used as a pair of contact portions 24a and 24b, the radial dimension of the contact portions 24a and 24b is the plate of the shield shell 20. It will be suppressed to the thickness dimension. Therefore, it is possible to reduce the size of the shield connector A as a whole as compared with the case where the portion protruding in the radial direction (inner peripheral side or outer peripheral side) from the shield shell is used as the contact portion.
After the terminal fitting 30 and the connecting member 40 are attached to the housing 10, the rubber plug 38 that has been previously fitted to the shielded electric wire 33 and the holder 39 for retaining the rubber plug 38 are moved forward. And fit into the seal space 18 in the housing 10. The rubber plug 38 prevents water from entering the housing space 17 and the cavity 15 from behind.

< Embodiment 1 >
Next, Embodiment 1 of the present invention will be described with reference to FIGS. In the shield connector B of the first embodiment , the contact portion 56 and the connection piece 61 are configured differently from the above reference example . Since other configurations are the same as those in the above-described reference example , the same reference numerals are given to the same configurations, and descriptions of structures, operations, and effects are omitted.

  The upper surface plate 51 of the shield shell 50 is formed with a hitting portion 52 by hitting the rear edge so as to protrude downward (inner peripheral side). The hitting portion 52 is open to the outer peripheral side and the rear end side of the shield shell 50, and a pair of left and right side plates 53 that extend from the upper surface plate 51 substantially at right angles, and the inner peripheral side of the both side surface plates 53. A connection plate 54 in which the edges are connected to each other and substantially parallel to the upper surface plate 51, extends downward from the upper surface plate 51 at a substantially right angle, and the front edge of the side plate 53 and the front edge of the connection plate 54 And a front plate 55 in a connected form. The inner surfaces of the pair of side plates 53 facing each other form a pair of contact portions 56. A space surrounded by the pair of contact portions 56 (side plate 53), the connection plate 54, and the front plate 55 is a holding space 57 for accommodating the connection piece 61. The holding space 57 is open to the outer peripheral side and the rear end side of the shield shell 50. Further, the connection plate 54 is formed with a retaining portion 58 that protrudes upward (outer peripheral side) in a substantially spherical shape.

  The connection member 60 is formed with a connection piece 61 in a form in which a band plate-like portion extending from the rear end edge of the large-diameter portion 43 is folded back to the outer peripheral side and extended forward in a cantilevered manner. The connecting piece 61 is bent in a generally chevron shape, and its width dimension is substantially the same as or slightly smaller than the distance between the pair of contact portions 56.

  When the connection member 60 is inserted into the housing 11 together with the terminal fitting 30, the connection piece 61 enters the holding space 57 while being in sliding contact with the upper surface of the connection plate 54 in the housing space 17. When the terminal fitting 30 is inserted to the proper position, the front end portion of the connection piece 61 that has passed through the retaining portion 58 is elastically locked to the retaining portion 58 from the front, and the upper surface (outer surface) of the connecting plate 54 ) Elastically in the radial direction. Since the connection piece 61 is sandwiched between the pair of contact portions 56 in the circumferential direction (left-right direction), the relative movement of the connection member 60 in the circumferential direction with respect to the shield shell 50 is thereby restricted. The inclination of the terminal fitting 30 around the axis is restricted.

As described above, in the first embodiment, since the pair of side plates 53 constituting the contact portion 56 are coupled by the connection plate 54, there is no possibility that the distance between the pair of contact portions 56 is widened, and the pair of contact portions 56 The reliability of the movement restriction of the connection piece 61 by the contact portion 56 is excellent.
In addition, since the side plate 53 and the connection plate 54 are also connected by the front plate 55, the pair of side plates 53 are displaced obliquely with respect to the upper plate 51 of the shield shell 50 while maintaining a parallel orientation to each other. There is no fear.

<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) According to the present invention, the connection piece and the pair of contact portions may be formed on the shield shell, and the pair of contact portions and the connection piece may be formed on the connection member.
(2) According to the present invention, the connection piece may be disposed between the pair of contact portions formed on the connection member, the connection piece protruding radially inward from the shield shell.
(3) In the present invention, the number of connection pieces formed on one connection member may be plural.
(4) The groove edge portion of the groove portion in the reference example may be cut and raised to the inner peripheral side or the outer peripheral side, and the opposing surfaces of the cut and raised portion may be a pair of contact portions.
(5) According to the present invention, the side plate and the connection plate in the first embodiment may be discontinuous and independent from each other.

Rear view of the shield connector of the reference example Cross section of shield connector Partial cutaway plan view of shield shell and connecting member Rear view of connecting member Plan view showing the manufacturing process of the connecting piece Sectional drawing of the shield connector of Embodiment 1 Rear view of shield connector Partially cutaway plan view showing the state before connection of the shield shell and connecting member

Explanation of symbols

A ... shield connector 10 ... housing 20 ... shield shell 23 ... groove 24a, 24b ... contact part 27 ... holding space 30 ... terminal fitting 33 ... shield wire 34 ... conductor 36 ... braided wire 40 ... connection member 44 ... connection piece B ... Shield connector 50 ... Shield shell 53 ... Side plate 54 ... Connection plate 56 ... Abutting portion 57 ... Holding space 60 ... Connection member 61 ... Connection piece

Claims (1)

A housing having a cylindrical shield shell;
A terminal fitting inserted into the housing in a state connected to the conductor of the shielded wire;
A metal connecting member fixed to the outer periphery of the braided wire of the shielded electric wire,
In one of the connection member and the shield shell, a connection piece is formed, and on the other side, a shield connector in which a pair of contact portions sandwiching the connection piece in the circumferential direction is formed .
In the shield shell or the connection member, a pair of side plates and a connection plate for connecting the pair of side plates are formed by knocking,
An inner surface of the pair of side plates serves as the pair of contact portions, and the connection piece is in contact with the connection plate in a radial direction .

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