JP2009193830A - Shielded connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielded connector provided with a shield shell manufacturable by a method of shaping, by bending a material obtained by punching a metal plate of an expanded shape, a shield shell of a shape having a step between a housing storage part and a tube connection part by the difference of aperture size. <P>SOLUTION: In this shielded connector having a terminal at a wire end held to a shield shell through an insulating housing, the shield shell is shaped by applying bending work to a material obtained by punching the metal plate and having an expanded shape, and provided with a rectangular cylindrical housing storage part for storing the housing therein, and a cylindrical tube connection part used for connecting a shield tube externally mounted to a wire thereto, and having a small aperture relative to the housing storage part; the tube connection part has a plurality of split lines in its outer periphery direction; and respective split parts split by the split lines are integrally connected to the housing storage part through a connection piece. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shielded connector, and more particularly to a shielded connector suitably used for a wire harness of an automobile or the like.

  2. Description of the Related Art In recent years, electric signals have been increased in pressure and speed in in-vehicle systems such as car electrical devices such as car navigation systems, and the need for EMI (Elctro Magnetic Interference) shielding has been increasing. For such an EMI shield, it is preferable to use a single-core shielded electric wire or a multi-core shielded electric wire having a shield structure. Since such a shielded electric wire has a structure that is completely shielded from one end to the other end, the shielding property is good.

  However, if such shielded wires are used only when it is necessary to partially shield the wires, such as only the connecting portion between electrical devices, the wire harness is large when a plurality of shielded wires are bundled into a harness. As the diameter is increased, the workability of the connection between the shielded electric wire and the shield connector is poor.

  For this reason, it is possible to externally attach a conductive shield tube of a retrofit type to the electric wire of the part so that only a necessary part of the electric wire can be shielded using a normal electric wire without using a shielded electric wire. Has been done.

  For example, in the case of a shield tube made of braided wire, the shield tube end portion is usually covered with a shield shell for shielding of the shield connector, and the shield tube is caulked by a metal fastening member such as a ring or a band. And the shield tube and shield shell are electrically connected.

  A shield connector to which such a shield tube is connected is as shown in FIG. As shown in FIG. 9A, the shield connector 21 includes a housing 23 into which a terminal 22 connected to a terminal portion of the electric wire W is inserted and held, and a metal shield shell that covers the outside of the housing 23. 24.

  In this case, the shield shell 24 is provided with a rectangular tube-shaped housing housing portion 26 for housing the housing 23 and a tube connecting portion 27 that is electrically connected by covering the terminal portion of the shield tube T in the front-rear direction. ing. Further, the ring 25 is crimped on the end portion of the shield tube T covered with the tube connection portion 27 of the shield shell 24 as shown in FIG. 9B. FIG. 9C is a perspective view of the shield shell 24 as viewed obliquely from the rear.

  As shown in the figure, the shield shell 24 has a structure in which a rectangular tubular housing accommodating portion 26 and a cylindrical tube connecting portion 27 having a smaller diameter than the housing accommodating portion 26 are connected to each other in the front-rear direction. Since the shield shell 24 has a shape having a step between the housing accommodating portion 26 and the tube connecting portion 27, conventionally, in the production of such a shield shell 24, a metal tube is deeply drawn. A method of forming by machining or a method of forming a metal member by cutting is employed. In addition, the following patent document is mentioned as a prior art document relevant to this invention.

JP 2002-281654 A

  However, as a method of forming a terminal, compared with a method of forming by bending a widely-developed punched metal plate, a method of forming a terminal, a so-called progressive press forming method, as described above. Since the method of forming the metal cylinder by deep drawing or the method of forming the metal member by cutting is expensive, the cost for manufacturing the shield shell 24 having the above-described shape is high. As a result, it has become difficult to reduce the manufacturing cost of the shield connector.

  Therefore, the problem to be solved by the present invention is that a shield shell having a step between the housing accommodating portion and the tube connecting portion due to the difference in the diameter is bent to a developed shape obtained by punching a metal plate. The shield connector provided with the shield shell which can be manufactured with the method of shape | molding by this is provided.

  In order to solve the above problems, the shield connector according to the present invention is a shield connector in which the terminal of the electric wire is held by the shield shell via an insulating housing, and the shield shell has a developed shape obtained by punching a metal plate. A rectangular tube-shaped housing housing portion in which the housing is housed, and a shield tube that is sheathed on the electric wire, and a smaller diameter than the housing housing portion. The tube connecting portion has a plurality of dividing lines in the outer circumferential direction, and each divided portion divided by the dividing lines is integrated with the housing accommodating portion via a connecting piece. The gist is that they are connected to each other.

  According to such a configuration, the rectangular shell housing accommodating portion and the shield shell having a cylindrical tube connecting portion having a smaller diameter than the housing accommodating portion are bent into a developed shape obtained by punching a metal plate. It becomes possible to shape | mold by giving. Thereby, a shield shell can be manufactured at a lower cost than a method of forming a metal cylinder by deep drawing or a method of forming a metal member by cutting.

  In this case, if the connecting piece is provided at the corner position of the housing accommodating portion, the shield shell can be easily bent from the unfolded shape, and the cost can be reduced accordingly. Further, if the connecting piece is configured so as to close the gap between the housing accommodating portion and the tube connecting portion, the shielding performance by the shield shell is equivalent to that of a conventional deep drawn product or the like. Shield performance can be achieved.

  According to the shield connector according to the present invention having the above-described configuration, the shield shell provided in the shield connector is connected to the rectangular tube-shaped housing housing portion in which the housing is housed and the shield tube that is sheathed on the electric wire, and the housing is housed in the shield shell. The tube connecting portion has a cylindrical tube connecting portion having a smaller diameter than the portion, and the tube connecting portion has a plurality of dividing lines in the outer circumferential direction, and each dividing portion divided by the dividing lines is connected to the housing accommodating portion via a connecting piece. As a result, the shield shell can be manufactured by bending the unfolded shape of the punched metal plate to form a shield shell. Conventionally used deep drawing and cutting It is possible to make the shielding performance equivalent to those of the deep-drawn products and the like at a lower cost than the molding method according to 1.

  Embodiments of a shield connector according to the present invention will be described below with reference to the drawings. 1 is an exploded perspective view showing a schematic configuration of a shield connector according to the present invention, FIG. 2 is an external perspective view showing a state after assembly of the shield connector of FIG. 1, and FIG. 3 is provided in the shield connector of FIG. FIG. 4 is a front view of the shield shell of FIG. 3, and FIG. 5 is a plan view showing an unfolded shape of the shield shell of FIG. 3 before bending. In addition, about the member which comprises a shield connector etc., the connection direction with the other party shield connector which is not shown in figure is demonstrated before.

  As shown in FIGS. 1 and 2, the shield connector 1 connected to the terminal portion of the electric wire W includes a terminal 2, a housing 3, a shield shell 4, and a ring 5.

  The terminal 2 is connected to the core wire Wa of the electric wire W and transmits an electrical signal, and has a terminal shape called a so-called female type. The terminal 2 includes a terminal connection portion 2a connected to a male terminal of a mating shield connector (not shown) on the front side, and a wire crimping portion 2b connected to the core wire Wa of the wire W by caulking on the rear side. Yes.

  The housing 3 in which the terminal 2 is inserted and held is used to insulate between the conductors of the terminal 2 and the shield shell 4 and is formed by a resin insulating member having a predetermined dielectric constant. Yes. The housing 3 is formed with a terminal accommodating portion 3a penetrating in the front-rear direction, and the terminal 2 is inserted and fixed from the rear of the terminal accommodating portion 3a.

  The shield shell 4 is connected to a shield tube T that is externally attached to the electric wire W, and covers the periphery of the terminal 2 to electromagnetically shield it. The shield shell 4 includes a rectangular tubular housing accommodating portion 6 in which the housing 3 is accommodated, and a cylindrical tube connecting portion 7 to which a terminal portion of the shield tube T is covered and connected. As shown in the drawing, the housing accommodating portion 6 is provided on the front side, and the tube connecting portion 7 is provided on the rear side. The tube connection portion 7 is covered with the end portion of the shield tube T, and the ring 5 is caulked from above so that the shield tube T is connected to the tube connection portion 7.

  The housing accommodating portion 6 of the shield shell 4 is fitted and connected to a shield shell of a counterpart shield connector (not shown). In this case, as shown in the drawing, the diameter of the tube connecting portion 7 is formed smaller than the diameter of the housing accommodating portion 6, and there is a step between the housing accommodating portion 6 and the tube connecting portion 7. .

  As shown in FIG. 3, a plurality of connecting pieces 8 and 9 having a substantially band shape are provided at a step portion between the housing accommodating portion 6 and the tube connecting portion 7 of the shield shell 4. The rear end edge of the housing accommodating portion 6 and the front end edge of the tube connecting portion 7 are connected via the pieces 8 and 9.

  FIG. 4 shows a front view of the shield shell 4 as viewed from the front side. As shown in FIGS. 3 and 4, the four connecting pieces 8 positioned at the four corners of the rear end edge of the rectangular tube-shaped housing accommodating portion 6 are divided into four by the dividing line 10. Are integrally connected to each of the four divided portions 7a. Further, the two connecting pieces 9, 9 positioned on the four sides of the rear end edge of the rectangular tube-shaped housing accommodating portion 6 are adjacent to the engaging pieces 9 a, 9 a at the front end with the dividing line 10 interposed therebetween. The divided portions 7a and 7a are engaged with and connected to the engaging portions 7b and 7b. As shown in FIGS. 3 and 4, the connecting pieces 8 and 9 are provided radially from the tube connecting portion 7.

  FIG. 5 shows the unfolded shape of the shield shell 4 before bending. This developed shape is obtained by punching a metal plate with a predetermined mold. As illustrated, the unfolded housing housing 6 is formed in a substantially rectangular shape. By bending the unfolded housing housing 6 along the valley fold line 6a shown in the drawing of the unfolded housing housing 6, the rectangular tube housing housing 6 as shown in FIG. Is formed.

  Further, the left end edge of the unfolded housing housing 6 is provided with a convex portion 6b that is formed to protrude outward, and the right end edge is provided with a concave portion 6c that is formed to be cut out inward. After the bending process, as shown in FIG. 3, the convex portion 6b is engaged with the concave portion 6c, and the left and right edges of the unfolded housing housing portion 6 are joined.

  The expanded tube connecting portion 7 shown in FIG. 5 is divided into four divided portions 7a having the same expanded shape. The unfolded dividing portion 7a formed in a substantially rectangular shape is formed into a dividing portion 7a as shown in FIG. 3 when bending is performed at an arc angle of 90 degrees.

  On the left end edge of the unfolded divided portion 7a, a convex portion 7c that protrudes outward is provided, and on the right end edge, a concave portion 7d that is notched inward is provided. As described above, the developed-shaped divided portion 7a is bent at a circular arc angle of 90 degrees, and the convex portions 7c and the concave portions 7d of the adjacent divided portions 7a are engaged to join the four divided portions 7a. Then, a cylindrical tube connecting portion 7 as shown in FIG. 3 is formed.

  As shown in FIG. 5, the center of the front end edge of the unfolded divided portion 7 a and the valley fold line 6 a position of the rear end edge of the unfolded housing housing portion 6 are integrally connected by the connecting piece 8. ing. In addition, the rear end edge between the adjacent valley fold lines 6a, 6a of the housing housing portion 6 in the developed shape, that is, the portion corresponding to the side portion of the rear end edge of the housing housing portion 6 after bending, Each of the two connecting pieces 9, 9 extends obliquely toward the dividing portion 7a. A constricted engagement piece 9a is formed at the distal end of the connecting piece 9, and is engaged with engagement portions 7b formed in notches on both the left and right sides of the front end edge of the developed-shaped divided portion 7a. It has become.

  As described above, the shield shell 4 having a shape having a step between the housing accommodating portion 6 and the tube connecting portion 7 having a smaller diameter than the housing accommodating portion 6 is formed as a metal plate as shown in FIG. 3 can be formed into a state as shown in FIG. 3 by bending the unfolded shape.

  Thereby, since such a shield shell 4 can be manufactured by what is called progressive press molding, rather than the method of shape | molding a metal cylinder by deep drawing, or the method of shape | molding a metal member by cutting. The shield shell 4 can be manufactured at a low cost, and as a result, an increase in the manufacturing cost of the shield connector can be suppressed.

  Further, the gap between the housing accommodating portion 6 and the tube connecting portion 7 is blocked by a plurality of connecting pieces, in the above-described embodiment, the eight connecting pieces 8 and 9 with a sufficient area where the shielding performance is not deteriorated. Therefore, the shield performance of the shield shell 4 described above can be made equal to the shield performance of the shield shell 24 of FIG. 9 described in the prior art.

  Next, modified examples of such a shield shell will be described with reference to FIGS. 6 is an external perspective view of the shield shell according to the modification viewed obliquely from the rear, FIG. 7 is a front view of the shield shell of FIG. 6, and FIG. 8 is a plan view showing the unfolded shape of the shield shell of FIG. FIG. In addition, about the same structure as the shield shell 4 mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  As shown in FIG. 6, a plurality of connecting pieces 12 are provided at a step portion between the housing accommodating portion 6 and the tube connecting portion 7 of the shield shell 11, and the housing accommodating portion is interposed via the connecting pieces 12. The rear end edge of 6 and the front end edge of the tube connecting portion 7 are connected.

  As shown in FIGS. 6 and 7, the four connecting pieces 12 located at the four corners of the rear end edge of the rectangular tube-shaped housing accommodating portion 6 are divided into four by the dividing line 10. Are integrally connected to each of the four divided portions 7a. Further, the connecting pieces 12 are provided radially from the tube connecting portion 7. In this case, the connecting piece 12 has a substantially fan shape, and has an area capable of closing the gap in the stepped portion between the housing accommodating portion 6 and the tube connecting portion 7 of the shield shell 11.

  FIG. 8 shows the unfolded shape of the shield shell 12 before bending. This developed shape is obtained by punching a metal plate with a predetermined mold. As shown in the drawing, the center of the front end edge of the unfolded divided portion 7a and the valley fold line 6a position of the rear end edge of the unfolded housing accommodating portion 6 are integrally formed by a substantially fan-shaped connecting piece 12. It is connected.

  A shield shell 11 having a shape with a step between such a housing accommodating portion 6 and a tube connecting portion 7 having a smaller diameter than the housing accommodating portion 6 is punched out of a metal plate as shown in FIG. It is possible to form into a state as shown in FIG. 6 by bending the developed shape.

  Thereby, since such a shield shell 11 can be manufactured by what is called progressive press molding, rather than the method of shape | molding a metal cylinder by deep drawing, or the method of shape | molding a metal member by cutting. The shield shell 11 can be manufactured at a low cost, and as a result, an increase in the manufacturing cost of the shield connector can be suppressed.

  Further, since the gap between the housing accommodating portion 6 and the tube connecting portion 7 is blocked by the four substantially fan-shaped connecting pieces 12 with a sufficient area where the shielding performance does not deteriorate, the shield shell 11 described above. This shield performance can be made equivalent to the shield performance of the shield shell 24 of FIG. 9 described in the prior art.

  The embodiment of the shield connector according to the present invention has been described above. However, the present invention is not limited to such an example, and can of course be implemented in various modes without departing from the gist of the present invention. It is. For example, in the above-described embodiment, the substantially strip-shaped connecting pieces 8 and 9 and the substantially fan-shaped connecting piece 12 are described as the connecting pieces that connect the housing accommodating portion 6 and the tube connecting portion 7. The shape is not limited to the above-described embodiment, and various shapes can be used.

It is the disassembled perspective view which showed schematic structure of the shield connector which concerns on one Embodiment of this invention. It is the external appearance perspective view which showed the state after the assembly | attachment of the shield connector of FIG. It is the external appearance perspective view which looked at the shield shell with which the shield connector of FIG. It is the front view which looked at the shield shell of FIG. 3 from the front side. It is the top view which showed the expansion | deployment shape before the bending process of the shield shell of FIG. It is the external appearance perspective view which looked at the modification of the shield shell with which the shield connector of FIG. It is the front view which looked at the shield shell of FIG. 6 from the front side. It is the top view which showed the unfolded shape before the bending process of the shield shell of FIG. It is the external appearance perspective view which showed schematic structure of the shield connector used conventionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield connector 2 Terminal 3 Housing 4 Shield shell 5 Ring 6 Housing accommodating part 6a Valley fold line 7 Tube connection part 7a Split part 7b Engagement part 8 Connection piece 9 Connection piece 9a Engagement piece 10 Division line 11 Shield shell 12 Connection piece W Electric wire Wa Core T Shield tube

Claims (3)

  In a shield connector having a shield shell that covers the outer periphery of an insulating housing that holds a terminal connected to an electric wire terminal, the shield shell is formed by bending a metal plate that has been developed by punching a metal plate. A rectangular tube-shaped housing housing portion in which the housing is housed, a shield tube that is externally mounted on the electric wire, and a cylindrical tube connection portion having a smaller diameter than the housing housing portion. The tube connecting portion has a plurality of dividing lines in the outer circumferential direction, and each divided portion divided by the dividing lines is integrally connected to the housing accommodating portion via a connecting piece. Shield connector characterized by.   The shield connector according to claim 1, wherein the connecting piece is provided at a corner position of the housing accommodating portion.   The shield connector according to claim 1, wherein the connecting piece is provided so as to close a gap between the housing accommodating portion and the tube connecting portion.

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