JP2005276664A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a shield member from coming off a shield shell. <P>SOLUTION: The front end part of the shield member 18 is folded back from the inner peripheral side of a stop-ring 31 arranged forward of the calking ring 30 to the outer peripheral side and superposed in the diameter direction, and its superposed part 18a is pinched between a shield shell 20 and the calking ring 30, and calked. The end part of the shield member 18 wound around the stop-ring 31 is made hard to come off the stop-ring 31 by a hooking operation by a lapel. Even if the shield shell 20 is deformed and loosening is generated against the calking ring 30 when calking, the stop-ring 31 is regulated of the displacement backward by the hooking to the calking ring 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shield connector.

Conventionally, there is a shield connector described in Patent Document 1. In this shield connector, a plurality of electric wires are collectively surrounded by a cylindrical shield member made of a braided wire, and as a terminal processing method for the shield member, the shield member is fixed to the shield shell by caulking. At the time of caulking, a shield member is put on the outer periphery of the shield shell, and a caulking ring is fitted on the outer periphery of the shield member, and the shield member is sandwiched between the caulking ring and the shield shell by caulking.
JP 2002-31396 A

  When the shield shell is connected to the mating shell member, a structure is formed in which the elastic contact piece is formed by bending the shield shell into a tightly folded shape at the edge of the shield shell as a connection means with the mating shell member. However, in order to avoid a crack in the tightly folded portion of the elastic contact piece, it is necessary to reduce the thickness of the shield shell.

  On the other hand, as the shield shell, there is a type in which a flat metal plate material is bent into a cylindrical shape and the edges thereof are joined using an engagement structure such as a hole and a locking piece. In the case where the above-mentioned elastic contact piece with the folded back shape is formed on the shield shell having such a joint portion, the joint portion is deformed during caulking because the thickness of the shield shell is reduced. As a result, there is a concern that loosening occurs between the caulking ring and the shield shell, and the shield member is detached from the shield shell.

  The present invention has been completed based on the above circumstances, and an object thereof is to prevent the shield member from coming off the shield shell.

  As a means for achieving the above object, the invention of claim 1 is characterized in that a shield member made of a braided wire that collectively surrounds a plurality of electric wires and an end in the circumferential direction by bending a metal plate into a cylindrical shape. A shield shell having a shape in which edges are joined to each other, and the front end portion of the shield member is clamped and fixed between the shield shell and a caulking ring arranged on an outer periphery of the shield shell. The retaining ring is disposed at a front position of the caulking ring on the outer periphery of the shield shell, and the front end portion of the shield member is hidden from the rear to the inner peripheral side with respect to the retaining ring. The form folded back to the side or the form folded back from the rear to the outer peripheral side and turned back to the inner peripheral side, and overlapped in the radial direction by the folding Characterized in place it is crimped to the front end of the Rudo member sandwiched between the crimping ring and the shield shell.

  According to a second aspect of the present invention, in the one according to the first aspect, the joint portion of the shield shell is covered from the outer peripheral side by one or both of the caulking ring and the retaining ring. Shield connector with features.

<Invention of Claim 1>
The terminal portion of the shield member wound around the retaining ring is difficult to come off from the retaining ring due to a hooking action caused by folding. Further, even when the shield shell is deformed during caulking and loosening occurs between the shield shell and the caulking ring, the retaining ring is caught by the caulking ring and the rearward displacement is restricted. This prevents the shield member from coming off the shield shell.

<Invention of Claim 2>
Since the joint part of the shield shell is covered with the caulking ring and the retaining ring, foreign matter does not interfere with the joint part, and the joint part may be deformed or separated due to the foreign matter interference. It is prevented.

<Embodiment 1>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The shield connector F of the present embodiment includes a synthetic resin housing 10 and a plurality of (three in the present embodiment, but two or four) inserted in the housing 10 from the rear and held in a retaining state. A shield made of a braided wire that collectively encloses the plurality of wires 17 led out from the housing 10 to the rear. A member 18 and a shield shell 20 fixed to the front end of the shield member 18 are provided.

  The housing 10 is formed by integrally forming a main body portion 11 for housing the terminal fitting 16 and a cylindrical fitting portion 12 surrounding the main body portion 11. A mounting space 13 having a substantially square shape with four corners formed in a semicircular arc shape is formed therebetween. The connecting portion 14 that connects the main body portion 11 and the rear end portion of the cylindrical fitting portion 12 is a horizontal center position in the horizontal upper and lower surfaces on the outer periphery of the main body portion 11 and a quadrant of four corners on the outer periphery of the main body portion 11 It is formed in a total of 6 places with the arcuate part. On both the upper and lower surfaces of the main body 11, a pair of left and right protruding retaining portions 15 are formed so as to be located on both the left and right sides of the connecting portion 14, respectively. In the mounting space 13, the shield shell 20 is attached from the rear, and the hood portion Ma of the mating connector M is inserted from the front.

  The shield shell 20 is formed by bending a metal plate material punched into a predetermined shape into a cylindrical shape, and joining (connecting) both end edges in the circumferential direction thereof. It has a square shape, that is, a shape that matches the mounting space 13 of the housing 10. The plate thickness of the shield shell 20 is 0.4 mm, and the material is brass or a heat-resistant copper alloy. The joint portion 21 (joint portion) of the shield shell 20 is inserted in order so that the claw pieces protruding from one end edge portion are corrugated into two left and right locking holes formed on the other end edge portion, The fitting portion between the claw piece and the locking hole is flattened by caulking in the radial direction. The joint portion 21 is disposed at the center position in the width direction of the upper plate portion of the shield shell 20 having a flat plate shape.

  The position corresponding to the connecting portion 14 of the housing 10 in the shield shell 20, that is, the center position in the width direction and the four arcuate portions at the four corners of the flat plate upper and lower plate portions are substantially square from the front edge of the shield shell 20 to the rear. The relief part 22 of the notch form is formed. The joint portion 21 described above is disposed at two positions in the front and rear sides behind the escape portion 22 of the top plate. Furthermore, at the positions corresponding to the retaining portions 15 of the housing 10 in the shield shell 20, that is, the positions on the left and right sides of the relief portions 22 in the upper and lower plate portions, the plate portions are partially cut and raised to the inner peripheral side. An elastic locking piece 23 is formed so as to extend rearward in a cantilever manner. The elastic locking piece 23 corresponds to the rear end portion of the escape portion 22 in the front-rear direction, that is, the position corresponding to the connecting portion 14 in the front-rear direction (mounting space 13) when the shield shell 20 is assembled to the housing 10. At the rear end of the

  A plurality of elastic contact pieces 24 (relief portions) are formed on the front end edges of the upper and lower plate portions of the shield shell 20 that are folded back in close contact with the inner peripheral side at both left and right positions of the relief portion 22. Two pieces are formed on the right side of 22 and three pieces on the left side. Similarly, one elastic contact piece 24 is formed on each of the front end edges of the left and right side plate portions of the shield shell 20 that are folded back toward the inner periphery in a close contact manner. The elastic contact piece 24 is formed with a curved portion 24a that bulges inwardly toward the inner peripheral side, and this curved portion 24a is elastic in the radial direction with respect to the outer peripheral surface of the hood portion Ma of the mating connector M. It comes in contact with deformation. By forming the elastic contact piece 24 in close contact with the shield shell 20, the space for arranging the elastic contact piece 24 in the radial direction (up / down / left / right direction) is reduced, and the overall size of the shield connector F is reduced. Is realized.

  Moreover, the excessive deflection control part 25 is formed in the position corresponding to the curved part 24a of each elastic contact piece 24 in the shield shell 20, respectively by partially raising to the inner peripheral side at a substantially right angle. When the amount of elastic deflection toward the outer periphery of the bending portion 24a exceeds the normal amount of bending, the bending portion 24a abuts against the excessive bending restricting portion 25 so that further elastic deformation is restricted. . This prevents the bending portion 24a from being excessively bent beyond its elastic limit.

By using a caulking ring 30 and a retaining ring 31, the front end portion of the shield member 18 is connected to the shield shell 20 so as to be conductive. Hereinafter, the connection structure will be described.
In the shield shell 20, a region behind the escape portion 22 is a connection portion 26 that is continuous over the entire circumference. The connecting portion 26 is provided with the two front and rear joining portions 21 described above.

  A cylindrical retaining ring 31 having a substantially rectangular shape with four corners formed into a semicircular arc like the shield shell 20 is externally fitted in a substantially front half region 26F (a region including the front joint 21) on the outer periphery of the connection portion 26. Has been. In the external fitting state, the retaining ring 31 does not rattle in the vertical and horizontal directions with respect to the connecting portion 26 (direction substantially perpendicular to the inner peripheral surface of the retaining ring 31 and the outer peripheral surface of the connecting portion 26). As described above, the dimensions of the retaining ring 31 and the connecting portion 26 are set. The retaining ring 31 has a thickness of 1.0 mm (a dimension thicker than the shield shell 20 and the caulking ring 30), and the retaining ring 31 is made of brass.

  On the other hand, a cylindrical caulking ring 30 having a substantially square shape with four corners formed in a quarter arc shape, as in the case of the shield shell 20, is fitted onto the substantially rear half region 26 </ b> R on the outer periphery of the connection portion 26. The thickness of the crimping ring 30 is 0.6 mm, that is, it is thicker than the shield shell 20 and thinner than the retaining ring 31, and the material of the crimping ring 30 is brass. In a state before the shield member 18 is connected, a slight gap (a gap through which the shield member 18 passes) is formed between the inner peripheral surface of the caulking ring 30 and the outer peripheral surface of the shield shell 20.

  The shield member 18 is connected as follows. First, with the caulking ring 30 and the retaining ring 31 removed from the shield shell 20, the caulking ring 30 and the retaining ring 31 are sequentially fitted onto the shield member 18 from the front. Next, the front end portion of the shield member 18 protruding forward from the retaining ring 31 is folded back from the inner peripheral side to the outer peripheral side of the retaining ring 31, and the retaining ring 31 is wrapped by the shield member 18. Then, the front end portion of the shield member 18 folded back is extended rearward from the retaining ring 31, and the shield members 18 are overlapped in the radial direction behind the retaining ring 31. The overlapped front end portion of the shield member 18 and the retaining ring 31 wrapped in the shield member 18 are externally fitted to the connecting portion 26 of the shield shell 20 from the rear, and the retaining ring 31 is arranged in a substantially first half region of the connecting portion 26. And the overlapping portion 18 a of the shield member 18 is positioned in the substantially second half region 26 </ b> R of the connection portion 26. Thereafter, the caulking ring 30 is externally fitted to the substantially front half region 26F in the connection portion 26 of the shield shell 20 from the rear. As a result, the overlapping portion 18 a of the shield member 18 is inserted into the gap between the outer periphery of the shield shell 20 and the inner periphery of the caulking ring 30.

  In this state, as shown in FIG. 10A, the shield shell 20 is set so as to be externally fitted to the core N, and the caulking ring 30 is moved from the outer peripheral side to the substantially second half region 26R in the connection portion 26 of the shield shell 20. Crimp against it. Thereby, the overlapping portion 18a of the shield member 18 is firmly sandwiched between the shield shell 20 and the caulking ring 30, and the shield member 18 and the shield shell 20 are connected to be conductive. In the connected state, the retaining ring 31 and the caulking ring 30 are arranged so as to approach each other in the front-rear direction, or to contact in the front-rear direction with the shield member 18 interposed therebetween.

  The shield shell 20 to which the shield member 18 is thus connected is attached to the housing 10 from the rear. In the mounted state, a region of the shield shell 20 in front of the retaining ring 31 is accommodated in the mounting space 13, and the retaining ring 31 and the crimping ring 30 are exposed behind the cylindrical fitting portion 12. It is fitted on the part 11. In the mounting space 13, the shield shell 20 is in a state along the inner periphery of the cylindrical fitting portion 12, and the hood of the mating connector M is between the inner periphery of the shield shell 20 and the outer periphery of the main body 11. A fitting space for fitting the portion Ma is formed. The elastic contact piece 24 of the shield shell 20 faces the fitting space.

  The mating connector M includes a hood part Ma made of aluminum die cast and a terminal holding member Mb made of synthetic resin accommodated in the hood part Ma, and a male terminal Mc is attached to the terminal holding member Mb. ing. When the hood portion Ma is inserted into the fitting space by the rotation of the lever 33 provided in the housing 10, the curved portion 24a of the elastic contact piece 24 is brought into elastic contact with the outer peripheral surface of the hood portion Ma. The hood portion Ma is connected to be conductive, and the terminal fitting 16 and the male terminal Mc are connected to be conductive. In this fitted state, a region from the rear end of the housing 10 to the rear end of the hood portion Ma of the mating connector M, that is, a connection portion between the rear end of the terminal fitting 16 and the terminal fitting 16 and the male terminal Mc, It is shielded by the cylindrical shield shell 20 and the hood part Ma.

  Further, in the attached state, the escape portion 22 is fitted into the connecting portion 14, and the rear end edge of the escape portion 22 abuts against the connecting portion 14 from the rear, so that the shield shell 20 is stopped in front of the housing 10. At the same time, the elastic locking piece 23 gets over the retaining portion 15 and is latched from the front with respect to the retaining portion 15, so that the shield shell 20 is prevented from being detached rearward. 10 is held in a state where displacement in the front-rear direction is restricted.

  In the present embodiment, when the shield shell 20 is manufactured, a thin metal plate material (0.4 mm in the present embodiment) is used to enable the elastic contact piece 24 to be formed in a tightly folded shape. Therefore, the rigidity and bending strength of the shield shell 20 are relatively low.

  Further, in the step of caulking the shield member 18 to the shield shell 20, the core N is separated so as to be vertically and horizontally separated so that it can be removed from the shield shell 20 as shown in FIG. Since it is in a divided form, the center portion in the width direction (the portion where the joining portion 21 is disposed) in the upper and lower plate portions of the shield shell 20 and the height direction central portion in the left and right side plate portions are N is not supported. For this reason, in the region of the connecting portion 26 of the shield shell 20 that does not correspond to the core N (the region including the joint portion 21), the radially inner portion provided to the connecting portion 26 of the shield shell 20 via the caulking ring 30. Due to the caulking force in the direction, the inner circumferential side is improperly or excessively deformed. As a result, a gap (slack) is generated between the caulking ring 30 and the shield shell 20, and the shield member 18 is moved backward from the shield shell 20. There is a concern that it will fall off.

  However, in this embodiment, the retaining ring 31 is disposed at the front position of the caulking ring 30 on the outer periphery of the shield shell 20, and the front end portion of the shield member 18 is hidden from the rear to the inner peripheral side with respect to the retaining ring 31. The overlapping portion 18a of the shield member 18 that is overlapped in the radial direction by the folding back is sandwiched between the shield shell 20 and the crimping ring 30 to be crimped.

  Therefore, even if a rearward tensile force acts on the shield member 18 in a state where a looseness (gap) is generated between the shield shell 20 and the crimping ring 30, the shield member wound around the retaining ring 31. The front end portion of 18 is caught by the front end edge of the retaining ring 31 at the folded portion, and it is difficult to come off from the retaining ring 31 by this catching action. Since the retaining ring 31 is positioned in front of the caulking ring 30, the retaining ring 31 is configured so that the front end of the caulking ring 30 is not affected by a rearward tensile force acting on the retaining ring 31. The rearward displacement is regulated by hitting (being caught on) the edge. Further, since the shield member 18 is sandwiched between the rear end edge of the retaining ring 31 and the front end edge of the caulking ring 30, displacement of the shield member 18 in the front-rear direction is also restricted. Since the caulking ring 30 and the shield shell 20 are formed with recesses 20a and 30a along the circumferential direction so as to partially protrude toward the inner peripheral side during caulking, the caulking ring 30 and the shield shell 20 Even if a slight gap is generated between the shell 20 and the shell 20, the caulking ring 30 is not displaced in the front-rear direction with respect to the shield shell 20. As described above, the shield member 18 is reliably prevented from being detached from the shield shell 20 in the rearward direction.

  Moreover, since the thickness of the retaining ring 31 is relatively thick, even when the shield shell 20 is deformed to the inner peripheral side during caulking and a gap is formed between the caulking ring 30, There is no possibility that the retaining ring 31 enters.

  In the present embodiment, since the two joint portions 21 before and after the shield shell 20 are covered with the caulking ring 30 and the retaining ring 31, foreign matter does not interfere with the joint portion 21, and foreign matter interference occurs. This prevents the joint 21 from being deformed or separated.

<Other embodiments>
The present invention is not limited to the embodiment 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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the above embodiment, the end portion of the shield member is folded back from the inner peripheral side of the retaining ring to the outer peripheral side so as to be sandwiched between the shield shell and the caulking ring. The terminal portion of the member may be folded back from the outer peripheral side to the inner peripheral side of the retaining ring and sandwiched between the shield shell and the caulking ring.

  (2) In the above embodiment, the thickness of the retaining ring is set to be larger than the thickness of the caulking ring. However, according to the present invention, the thickness of the retaining ring is equal to or larger than the thickness of the caulking ring. Small dimensions may be used.

  (3) In the above embodiment, the retaining ring may be caulked similarly to the caulking ring.

  (4) In the above embodiment, both the caulking ring and the retaining ring, or the retaining ring may be accommodated in the housing.

  (5) In the above embodiment, either one or both of the caulking ring and the retaining ring may be disposed at a position deviated from the joint portion.

Partially cutaway perspective view showing the shield shell separated from the housing A perspective view showing the shield connector and the mating connector separated A perspective view showing a state in which the shield connector and the mating connector are engaged. Partially cutaway enlarged perspective view showing the locking structure of the elastic locking piece and the retaining portion Longitudinal section showing the shield shell, caulking ring, retaining ring and shield member separated A longitudinal sectional view showing the shield shell separated from the housing A longitudinal sectional view showing the shield shell attached to the housing Longitudinal sectional view showing the state where the shield connector and mating connector are mated Top view showing the shield shell separated from the housing (A) Schematic front view showing the state of the core when performing caulking (B) Schematic front view showing the state of the core when removing the shield shell after caulking

Explanation of symbols

17 ... Electric wire 18 ... Shield member 20 ... Shield shell 30 ... Caulking ring 31 ... Retaining ring

Claims (2)

A shield member composed of a braided wire that collectively surrounds a plurality of electric wires;
It comprises a shield shell in a form in which the metal plate material is bent into a cylindrical shape and the edges in the circumferential direction are joined together,
In what is to be fixed by clamping the front end portion of the shield member between the shield shell and the caulking ring arranged on the outer periphery of the shield shell,
A retaining ring is arranged at a front position of the caulking ring on the outer periphery of the shield shell,
With respect to the retaining ring, the front end portion of the shield member is hidden from the rear to the inner peripheral side and folded back to the outer peripheral side, or the rear cover is turned from the rear to the outer peripheral side and folded back to the inner peripheral side.
A shield connector characterized in that a front end portion of the shield member, which is overlapped in the radial direction by the folding, is crimped by being sandwiched between the shield shell and the crimping ring. 2. The shield connector according to claim 1, wherein the joint portion of the shield shell is covered from the outer peripheral side by one or both of the caulking ring and the retaining ring.

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