JP2006156278A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a gap in a shield shell and to assure electrical connection between the shield shells. <P>SOLUTION: The shield connector is provided with a terminal 22, a connector dielectric body 24 surrounding the terminal 22, the shield shell 30 formed by connecting a shield main body 32 covering the surrounding of the connector dielectric body 24 and a shield engaging part 36 and a connector housing 40. Projecting line contact parts 38a and 38c are formed on the shield engaging part 36 which can be brought into a linear contact with a countering shield shell 130. The projecting line contact parts 38a and 38c are formed along the whole width direction of side wall parts 36a and 36c and also in positions deviated along the direction of engaging connection of the shield shell 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shield connector applied to the communication field such as OA, FA, and in-vehicle.

  As a shield connector for high-speed communication, there is a configuration in which a terminal is covered with a dielectric and an outer periphery thereof is covered with a conductive shield shell. When connecting such shield connectors, it is necessary that the shield shells are electrically connected to each other around the outer periphery of the connection portion between the terminals.

  As a configuration for ensuring electrical contact between the shield shells, for example, the following configuration is assumed. That is, a part of the shield shell on one side is cut out in a tongue shape to form a spring piece, and a protrusion is provided on this spring piece. And in the fitting connection state of both shield shells, a projection part is pressed on the shield shell of the other side with the elastic force of a spring piece. It is the structure which is going to obtain the electrical contact between shield shells by the point contact of this projection part and shield shell.

  In addition, the shield connector provided with the shield shell is disclosed by patent document 1, for example.

JP 2004-327100 A

  However, in a configuration in which a spring piece is formed by cutting out a part of the shield shell into a tongue shape, a gap is generated around the spring piece. There is a risk of electromagnetic noise leaking from this gap. Further, in the above configuration, basically, since it is a configuration that attempts to obtain electrical contact between the shield shells by point contact between the protrusion and the shield shell, electrical connection between the two is sufficient. I can't say that.

  Then, an object of this invention is to provide the technique which can prevent the clearance gap between shield shells and can electrically connect shield shells more reliably.

  The shield connector according to the present invention includes at least one terminal, a dielectric surrounding the periphery of the terminal, a shield main body covering the periphery of the dielectric, and a shield fitting portion fitted to the shield shell on the other side. And a shield shell formed in a row, and the shield fitting portion is formed with at least one protruding contact portion that can linearly contact the inner surface or the outer surface of the mating shield shell. is there.

  In this case, a plurality of the protrusion contact portions may be formed, and each protrusion contact portion may be formed at a position shifted along the fitting connection direction of the shield shell.

  Moreover, the said shield fitting part is formed in the substantially rectangular tube shape, and the said protruding item | line contact part may be formed in each of each side wall part.

  Furthermore, it is preferable that the ridge contact portion is formed so as to extend over the entire width direction of the side wall portion.

  Moreover, the said protruding item | line contact part is good to extend along the direction which skews in the fitting connection direction of the said shield shell.

  Further, the shield shell may be provided with a grounding piece having a planar portion, and the seam portion between the plate-like portion and the plate-like portion of the shield shell is partially overlapped. Also good.

  According to the shield connector of the present invention, since the protruding contact portion that can be linearly contacted with the inner or outer surface of the shield shell on the other side is formed in the shield fitting portion, the shield shells are brought into linear contact with each other. Thus, the two can be more reliably electrically connected. In this case, since the protruding contact portion can be formed, for example, by partially pressing the shield fitting portion, the gap between the shield shells can be prevented.

  Further, in this case, when the plurality of protruding contact portions are formed and each protruding contact portion is formed at a position shifted along the fitting connection direction of the shield shell, the shield shell is fitted and connected. In this case, the connection resistance can be made relatively small.

  Furthermore, the shield fitting portion is formed in a substantially rectangular tube shape, and when the protruding contact portion is formed on each of the side wall portions, the shield fitting portion can be contacted evenly from the periphery, and the shield The shells can be electrically connected more reliably.

  Moreover, when each said protruding item | line contact part is formed so that it may cover the whole width direction of each said side wall part, a clearance gap can be made as small as possible between the shield shells which are fittingly connected.

  Further, when the protruding contact portion extends along a direction oblique to the fitting connection direction of the shield shell, the connection resistance when fitting and connecting the shield shell is dispersed to facilitate the connection. Can do.

  Furthermore, when a grounding piece having a planar portion is provided on the shield shell, the grounding piece can be electrically connected while being in surface contact with a member to be grounded, and electromagnetic shielding properties can be improved.

  In addition, when the plate-like portion and the plate-like portion of the shield shell partially overlap at the joint portion, the gap between the shield shells can be further reduced and the electromagnetic shielding property can be improved.

  The shield connector according to the embodiment of the present invention will be described below.

  FIG. 1 is an exploded perspective view showing a shield connector, FIG. 2 is a cross-sectional view showing the shield connector, and FIG. 3 is a partial cross-sectional plan view showing the shield shell. For the sake of convenience, the description will be given with the direction in which the board is provided on the shield connector as the bottom, the opposite direction as the top, the direction in which the shield connector on the other side is connected as the front, and the opposite direction as the back. .

  Here, the connector 20 of the type mounted on the printed circuit board 10 will be described. Incidentally, the mating connector 120 has the following configuration. That is, the mating connector 120 is of a type that is connected to the shielded cable 110, and includes a terminal 122 connected to the electric wire 111 of the shielded cable 110, a connector dielectric 124 that covers the periphery of the terminal 122, and a connector dielectric. A shield shell 130 covering the periphery of the body 124 and a connector housing 140 covering the shield shell 130 are provided.

  The shield connector 20 includes at least one terminal 22 (here, a plurality of terminals 22), a connector dielectric 24, a shield shell 30, and a connector housing 40.

  Each terminal 22 is configured to be electrically connected to a member to be connected (here, a wiring pattern formed on the substrate 10) and connectable to a terminal 122 on the mating connector 120 side. More specifically, each terminal 22 is formed in a substantially L-shaped member obtained by bending a conductive rod-shaped member such as annealed copper at a middle portion in the longitudinal direction. One end 22a of each terminal 22 is formed in a female terminal shape or a male terminal shape that can be connected to the mating terminal 122 as a connection destination, and here, it is formed in a pin-shaped male terminal portion 22a. . Further, the other end 22b of each terminal 22 is formed in a portion that is electrically connected to a member to be connected, and here, is formed in a pin-shaped lead portion 22b. The lead portion 22b is inserted into the through hole of the substrate 10 and soldered to the wiring pattern formed on the substrate 10 as appropriate.

  The connector dielectric 24 has a function of surrounding each terminal 22 and electrically insulating each terminal 22 from the shield shell 30. More specifically, the connector dielectric 24 is formed of an insulating material such as a resin having a predetermined dielectric constant. The connector dielectric 24 has a cavity 24h and a terminal accommodating hole (not shown) that can accommodate the terminals 22 described above. And while arrange | positioning the bending part of each terminal 22 in the cavity part 24h, inserting each male terminal part 22a of each terminal in each corresponding terminal accommodating hole part, each terminal 22 is the other party terminal 122. It is the structure hold | maintained by the predetermined | prescribed position and attitude | position which can be connected to. In this state, the connector dielectric 24 provides electrical insulation between the terminals 22 and the shield shell 30. In addition, in the state where the terminals 22 are held as described above, the lead portions 22b of the terminals 22 extend below the connector dielectric 24 from the cavity portion 24h.

  The shield shell 30 has a configuration in which a shield main body 32 and a shield fitting portion 36 are continuously provided, and is formed by appropriately pressing a conductive plate material, for example, a metal plate material such as annealed copper. ing.

  The shield main body 32 is configured to cover the periphery of the connector dielectric 24. Specifically, the shield main body 32 is formed in a bowl shape having an opening at the lower side and the front side, and the connector dielectric 24 can be accommodated therein. The connector dielectric 24 is accommodated and arranged at a fixed position in the shield main body 32 with the front face thereof exposed to the outside via the shield fitting portion 36.

  The shield fitting portion 36 is connected to the front side of the shield main body portion 32 and is configured to be fitted and connected to the shield shell 130 on the other side. Specifically, the shield fitting portion 36 is formed in a cylindrical shape, here, a substantially rectangular prismatic shape. The shield fitting portion 36 can be fitted and connected so that the mating shield shell 130 is fitted inside. A configuration may be employed in which the mating shield shell 130 is fitted and connected to the shield fitting portion 36. The shield fitting portion 36 only needs to have a cylindrical shape that can be fitted and connected to the shield shell 130 on the other side. In addition to the substantially square rectangular tube shape, the shield fitting portion 36 may have a cylindrical shape or a polygonal rectangular tube shape. It does not matter.

  Convex contact portions 38a, 38b, and 38c are formed in the shield fitting portion 36. The ridge contact portions 38a, 38b, and 38c are configured to be able to come into linear contact with the inner surface or outer surface of the mating shield shell 130. Here, the ridge contact portions 38a, 38b, and 38c are configured to be able to come into linear contact with the outer surface of the shield shell 130 that is fitted inside. Here, the linear contact includes a case where contact is made in a long region having a certain width. Further, the protruding direction and the like of the ridge contact portions 38a, 38b, 38c is determined according to the fitting connection mode between the shield shells 30, 130.

  Specifically, long convex contact portions 38a and 38b are formed on the upper side wall portion 36a and the lower side wall portion 36b of the shield fitting portion 36, and the left and right side wall portions 36c of the shield fitting portion 36 are formed. A long ridge contact portion 38c is formed.

  That is, the ridge contact portions 38a, 38b, and 38c are formed on all the side wall portions 36a, 36b, and 36c constituting the peripheral wall of the shield fitting portion 36, respectively. As a result, the convex contact portions 38a, 38b, and 38c are in contact with the shield shell 130 on the other side on the four sides of the shield fitting portion 36. However, the protrusion contact portions 38a, 38b, and 38c are not necessarily formed on all the side wall portions 36a, 36b, and 36c, and may be provided only on a part of them.

  These ridge contact portions 38a, 38b, and 38c are formed, for example, by pressing so that the side wall portions 36a, 36b, and 36c protrude partially. In addition, the ridge contact portions 38a, 38b, and 38c can be formed, for example, by attaching a long member to the inner surface (or outer surface) of the shield fitting portion 36 by a known method such as welding.

  Moreover, each protruding item | line contact part 38a, 38b, 38c is formed so that the whole width direction of each side wall part 36a, 36b, 36c may be covered. Here, the ridge contact portions 38a, 38b, and 38c are formed in an elongated shape extending along the width direction of the side wall portions 36a, 36b, and 36c, and both end portions thereof are both sides of the side wall portions 36a, 36b, and 36c. The length is formed so as to reach the edge. As a result, the ridge contact portions 38a, 38b, 38c come into contact with the mating shield shell 130 over almost the entire width direction of the side wall portions 36a, 36b, 36c, so that the gap between the shield shells 30, 130 is reduced. I try to reduce it.

  Further, the protruding contact portions 38 a, 38 b and 38 c are formed at positions shifted along the fitting connection direction of the shield shell 30. Specifically, the ridge contact portions 38a, 38b are formed at positions (opening side) from the front of the upper side wall portion 36a and the lower side wall portion 36b, and the ridge contact portions 38c are the left and right side wall portions 36c. It is formed in the position from the back (back side). Then, when the mating shield shell 130 is fitted and connected in the shield shell 30, first, the upper and lower ridge contact portions 38 a and 38 b first come into sliding contact with the outer surface of the shield shell 130, and then the left and right ridges are contacted. The contact part 38 c is in sliding contact with the outer surface of the shield shell 130. As a result, when the shield shells 30 and 130 are fitted and connected, the timing at which the protruding contact portions 38a and 38b and the protruding contact portion 38c start to slidably contact the mating shield shell 130 is shifted.

  In addition, it is preferable that the protruding item | line contact part 38a, 38b, 38c has a longitudinal cross-sectional shape which divided the substantially ellipse shape into 2 along the major axis direction. This is because by bringing a relatively gentle curved surface portion into contact with the shield shell 130 on the other side, the contact resistance at the time of fitting connection can be made relatively small and the contact area can be made relatively large. However, the ridge contact portions 38a, 38b, and 38c may have a substantially semicircular shape, a substantially rectangular shape, or a substantially triangular longitudinal section.

  In addition, a concave groove is formed at a position corresponding to the convex contact portions 38a, 38b, 38c in the shield shell 130 on the mating side, and each convex contact portion 38a is connected to the connectors 20, 120. , 38b, 38c may be fitted into the groove.

  Further, the shield shell 30 is configured so as to partially overlap at a joint portion between the plate-like portion 30a and the plate-like portion 30b.

  That is, when the shield shell 30 is formed by pressing a conductive plate material or the like, a seam portion between the plate-like portion 30a and the plate-like portion 30b is generated according to the expanded assembly form (the arrows in FIGS. 1 and 4). P part reference). If a gap is formed between the plate-like portion 30a and the plate-like portion 30b at the joint portion, electromagnetic noise leaks through the gap. In view of this, the seam between the plate-like portion 30a and the plate-like portion 30b is partially overlapped.

  Here, a seam is formed between the plate-like portion 30a on the rear side of the shield shell 30 and the plate-like portion 30b on one side. An elongated trapezoidal connecting margin piece 30c is formed on the side edge of the rear plate-like portion 30a. Then, the connecting piece 30c is bent toward the plate-like portion 30b on one side so as to be closely adhered to the plate-like portion 30b. By this connecting piece 30c, it is possible to close the gap at the joint between the plate-like portion 30a and the plate-like portion 30b. Thereby, the clearance gap between the shield shells 30 can be made smaller, and electromagnetic shielding properties can be improved.

  The shield shell 30 is provided with a grounding piece 34 having a planar portion. Here, a substantially square plate-shaped grounding piece 34 is formed at the lower part of both sides of the shield main body 32 so as to extend outward from both sides. The bottom surface of the grounding piece 34 is flat and is located on substantially the same plane as the bottom surface of the connector housing 40. Then, in a state where the shield connector 20 is disposed and fixed on the substrate 10, the grounding piece 34 is in surface contact with the grounding wiring pattern 12 g formed on one side of the substrate 10 as shown in FIG. It is configured.

  The connector housing 40 is formed of a resin or the like and has a shape that covers the shield shell 30. Here, it is formed in a substantially box shape in which a part at the front and rear and further below is opened. The shield shell 30 and the connector dielectric 24 are accommodated in the rear half of the connector housing 40, and the connector housing 140 of the mating connector 120 is fitted and connected to the front half. The connector housing 40 is assembled with a lock mechanism (not shown) that maintains the connection state with the mating connector 120.

  In addition, fixing portions 42 for mounting and fixing the shield connector 20 to the board 10 are provided on both side portions of the connector housing 40.

  In the shield connector 20, the lead portions 22b of the terminals 22 are appropriately soldered to the wiring pattern on the substrate 10 side, and the grounding piece 34 is brought into surface contact with the grounding wiring pattern 12g on the substrate 10 side and soldered. Then, the fixing portion 42 is mounted and fixed to the substrate 10 by fixing the fixing portion 42 to the substrate 10 with screws or the like. By this grounding piece 34, the shield shell 130 is electrically connected in a state of surface contact with the grounding wiring pattern 12g, and the electromagnetic shielding property can be enhanced.

  When the mating connector 120 is connected to the shield connector 20 thus configured, the mating connector housing 140 is fitted and connected to the connector housing 40, and the mating shield shell 130 is connected to the shield shell 30. Mating and connecting. While the mating shield shell 130 is fitted and connected to the shield shell 30, first, the upper and lower ridge contact portions 38 a and 38 b first slidably contact the outer surface of the shield shell 130, and then the left and right ridge contact The part 38 c is in sliding contact with the outer surface of the shield shell 130. In addition, as the shield shells 30 and 130 are fitted and connected, the terminals 22 and 122 are also connected. The terminals 22 and 122 and the connector housings 40 and 140 are connected in a state where the shield shells 30 and 130 are fitted and connected until the mating connector dielectric 124 abuts against the connector dielectric 24. Will be completely completed. Thereby, it will be in the state by which the connector connection of both shielded connectors 20 and 120 was made. In this state, each of the ridge contact portions 38 a, 38 b, 38 c is pressed against the shield shell 130 on the other side by its own elastic urging force or the urging force of the shield fitting portion 36. Therefore, the shield shells 30 and 130 are in linear contact with each other on the four sides of the periphery through the protruding contact portions 38a, 38b, and 38c, and are electrically connected through this contact structure.

  According to the shield connector 20 configured as described above, the ridge contact portions 38a, 38b, and 38c that can linearly contact the inner surface or the outer surface of the mating shield shell 130 are formed in the shield fitting portion 36. Therefore, the shield shells 30 and 130 can be brought into linear contact with each other, and the two can be more reliably electrically connected. In this case, since the protruding contact portions 38a, 38b, and 38c can be formed by, for example, partially pressing the shield fitting portion 36, a gap between the shield shells 30 can be prevented.

  Moreover, since each protruding item | line contact part 38a, 38b, 38c is formed in the position shifted along the fitting connection direction of the shield shell 30, in the protruding item contact part 38a, 38b and the protruding item contact part 38c, The timing at which the shield shell 130 of the other party starts to slide can be shifted. Thereby, the maximum value of the connection resistance when the shield shells 30 and 130 are connected by fitting can be made relatively small.

  In addition, it is not necessary to form all the protrusion contact portions 38a, 38b, and 38c at positions shifted along the fitting connection direction of the shield shell 30, as long as they are formed at positions shifted at least in two places. Good.

  Further, since the protruding contact portions 38a, 38b, and 38c are formed on the respective side wall portions 36a, 36b, and 36c of the shield fitting portion 36, the shield shells 30 and 130 are linearly arranged around the four sides around each other. The shield shells 30 and 130 can be more reliably electrically connected to each other.

  Furthermore, since each protrusion contact part 38a, 38b, 38c is formed so that it may cover the whole width direction of side wall part 36a, 36b, 36c, a clearance gap is possible between the shield shells 30 and 130 which are fittingly connected. It can be made as small as possible.

  In addition, as in the modification shown in FIG. 5, the ridge contact portions 238 a, 238 b, 238 c corresponding to the ridge contact portions 38 a, 38 b, 38 c are inclined in the fitting connection direction of the shield shell 230. You may form so that it may extend along.

  In this modified example, the timing at which the portions of the ridge contact portions 238a, 238b, and 238c start to contact the mating shield shell can be dispersed more entirely and uniformly. Thereby, the connection resistance at the time of fitting and connecting the shield shells can be further dispersed, the maximum value of the connection resistance can be reduced, and the connection resistance can be made uniform, so that the connection can be facilitated. Of course, you may form the protruding item | line contact part 238a, 238b, 238c in the position shifted along the fitting connection direction of a shield shell.

  Further, in the present embodiment, the example applied to the shield shell 30 of the shield connector 20 of the type mounted on the substrate 10 has been described. However, the shield connector 120 of the type connected to the shield cable 110 like the counterpart side is described. This can also be applied to the shield shell 130. Of course, the present invention can also be applied to a shield shell of a connector used for connecting shielded cables.

It is a disassembled perspective view which shows a shield connector. FIG. 2 is a cross-sectional view showing the shield connector. It is a partial cross section top view which shows a shield shell. It is a figure which shows the contact state of a grounding piece and the wiring pattern for grounding. It is a figure which shows the modification of a protruding item | line contact part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Board | substrate 20 Shield connector 22 Terminal 24 Connector dielectric material 30 Shield shell 30a, 30b Plate-shaped part 30c Connection piece 32 Shield body part 34 Grounding piece 36 Shield fitting part 36a, 36b, 36c Side wall part 38a, 38b, 38c Projection Contact part 40 Connector housing 120 Shield connector 238a, 238b, 238c Convex contact part

Claims (7)

At least one terminal;
A dielectric surrounding the terminal;
A shield shell formed by connecting a shield body portion surrounding the periphery of the dielectric and a shield fitting portion fitted to the shield shell on the other side;
With
A shield connector in which at least one ridge contact portion that can be linearly contacted with an inner surface or an outer surface of a mating shield shell is formed in the shield fitting portion. The shield connector according to claim 1,
A plurality of the protruding contact portions are formed,
The shield connector in which each said protruding item contact part is formed in the position shifted along the fitting connection direction of the said shield shell. The shield connector according to claim 1 or 2,
The shield connector, wherein the shield fitting portion is formed in a substantially rectangular tube shape, and the convex contact portion is formed on each of the side wall portions. The shield connector according to claim 3,
The shield connector in which the ridge contact portion is formed so as to extend over the entire width direction of the side wall portion. The shield connector according to any one of claims 1 to 4,
The ridge contact portion is a shield connector extending along a direction oblique to the fitting connection direction of the shield shell. The shield connector according to any one of claims 1 to 5,
The shield connector which provided the grounding piece which has a planar part in the said shield shell. The shield connector according to any one of claims 1 to 6,
The shield connector which overlaps partially in the joint part of a plate-shaped part and a plate-shaped part among the said shield shells.

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