WO2024127885A1 - Shielded connector - Google Patents

Shielded connector Download PDF

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Publication number
WO2024127885A1
WO2024127885A1 PCT/JP2023/040946 JP2023040946W WO2024127885A1 WO 2024127885 A1 WO2024127885 A1 WO 2024127885A1 JP 2023040946 W JP2023040946 W JP 2023040946W WO 2024127885 A1 WO2024127885 A1 WO 2024127885A1
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Prior art keywords
housing
wiring board
connector
electrically connected
cross
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PCT/JP2023/040946
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French (fr)
Japanese (ja)
Inventor
英二 青樹
邦彦 山田
隆至 永田
旬記 江間
和起 服部
Original Assignee
矢崎総業株式会社
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Priority claimed from JP2022197867A external-priority patent/JP2024083824A/en
Application filed by 矢崎総業株式会社 filed Critical 矢崎総業株式会社
Publication of WO2024127885A1 publication Critical patent/WO2024127885A1/en

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  • the present invention relates to a shielded connector for high-speed signal transmission that is equipped with a shield shell that blocks electromagnetic noise (hereinafter referred to as "noise").
  • Patent Document 1 One such type of shielded connector is described in Patent Document 1.
  • the connector described in Patent Document 1 is attached to a board and includes a base, a number of connection terminals fixed to the base, a first protrusion, a second protrusion, and a cylindrical housing (case) formed from a conductive metal plate.
  • the connection terminals and base are housed and protected inside the housing, and noise radiation from the tip of the housing is suppressed by the first protrusion and second protrusion connected to the tip of the housing.
  • the distance of the conductive path through which noise flows from the connection terminal to the tip of the first protrusion and the tip of the second protrusion is longer than the distance of the conductive path through which noise flows from the connection terminal to the board, making it difficult to sufficiently suppress noise.
  • an electronic control unit (ECU) equipped with a connector such as that described in Patent Document 1 is installed in a vehicle, when the vehicle passes near a weather radar or military radar, it is conceivable that communication problems will occur due to noise from the strong electric field.
  • the present invention was made in consideration of these problems.
  • the object of the present invention is to provide a shielded connector that can sufficiently prevent noise generated around the terminals of the electric wire from penetrating into the inside of the housing, and can prevent the effects of external strong electric field noise, enabling stable communication.
  • a shielded connector comprises a shield shell that is electrically connected to a shield terminal of a mating connector on one side and is installed on a wiring board housed in a housing on the other side, a housing that houses the shield shell, and an earth piece that is electrically connected to the shield shell and is earthed to a wall surface of the housing, the shield shell having a connection part that is electrically connected to the earth piece, and a first cross-sectional area of the connection part is larger than a second cross-sectional area of a portion of the connection part that is closer to the wiring board than the wiring board.
  • the present invention provides a shielded connector that can adequately prevent noise generated around the terminals of the electric wire from penetrating into the housing, and can prevent the effects of strong external electric field noise, enabling stable communication.
  • FIG. 1 is a perspective view illustrating an example of a shield connector according to an embodiment.
  • FIG. 2 is a perspective view of a female connector of the shielded connector according to the embodiment.
  • FIG. 3 is a perspective view of a male connector of the shielded connector according to the embodiment.
  • FIG. 4 is an exploded perspective view of a female connector of the shielded connector according to the embodiment.
  • FIG. 5 is an exploded perspective view of a male connector of the shielded connector according to the embodiment.
  • FIG. 6 is a perspective view of the shield connector according to the embodiment mounted on a wiring board.
  • FIG. 7A is a cross-sectional view showing a state in which the shield connector according to the embodiment is housed in a housing.
  • FIG. 7B is an enlarged cross-sectional view of a main part of the shield connector according to the embodiment when it is housed in a housing.
  • FIG. 1 is a perspective view showing an example of a shielded connector 1 according to an embodiment.
  • FIG. 2 is a perspective view of a female connector 10 of the shielded connector 1.
  • FIG. 3 is a perspective view of a male connector 20 of the shielded connector 1.
  • FIG. 4 is an exploded perspective view of the female connector 10.
  • FIG. 5 is an exploded perspective view of the male connector 20.
  • FIG. 6 is a perspective view of the shielded connector 1 mounted on a wiring board 40.
  • FIG. 7A is a cross-sectional view showing the shielded connector 1 housed in a housing 2.
  • FIG. 7B is an enlarged cross-sectional view of the main parts of the shielded connector 1 housed in a housing 2.
  • the shielded connector 1 is a high-speed transmission connector for high-speed signal transmission with an electromagnetic shielding structure, and includes a female connector (mating connector) 10 and a male connector (connector) 20 that mates with the female connector 10.
  • the terminal 17a of a shielded electric wire 17, which is an STP (Shielded Twisted Pair) electric wire is connected to the female connector 10.
  • the male connector 20 is installed on the upper surface 40a of a wiring board 40 housed in a housing 2.
  • the shielded connector 1, the wiring board 40, the housing 2, and a communication device (not shown) housed in the housing 2 constitute a communication system device A.
  • the female connector 10 includes an outer housing (mating housing) 11, an outer terminal 12, an inner housing 13, a female inner terminal 14, an alignment part 15, an inner sleeve 16A, and an outer sleeve 16B.
  • the outer housing 11 is made of synthetic resin and has a rectangular cylindrical shape, and has a terminal accommodating portion 11a that accommodates the outer terminal 12, which is a shield terminal.
  • a lock arm 11c is provided on the upper surface 11b of the outer housing 11 to maintain the mated state when mated with the male connector 20.
  • the lock arm 11c is provided with a protruding engaging portion 11d.
  • the metallic outer terminal 12 which is a shield terminal, is formed into a cylindrical shape by sheet metal processing using a sheet metal material.
  • the outer terminal 12 has a cylindrical housing accommodating portion 12a as a shield connection portion that accommodates the inner housing 13 and the matching part 15.
  • the outer terminal 12 has a pair of braided crimping pieces 12b that crimp and connect the braided tube 19 exposed when a portion of the sheath 17B of the shielded electric wire 17 is cut away, and a pair of sheath crimping pieces 12c that crimp and connect the sheath 17B of the shielded electric wire 17.
  • the braided crimping piece 12b crimps the metallic inner sleeve 16A which is crimped to the outer periphery of the braided tube 19 exposed from the sheath 17B. Furthermore, the braided crimping piece 12b also crimps and connects the braided tube 19b which is folded back at the fold back portion 19a and covers the outer periphery of the inner sleeve 16A. The braided crimping piece 12b is crimped to the outer periphery of the inner sleeve 16A via the braided tube 19b which is folded back at the fold back portion 19a.
  • the braided tube 19b which is folded back at the fold back portion 19a is clamped between the braided crimping piece 12b and the inner sleeve 16A, and is held by the metallic hexagonal cylindrical outer sleeve 16B, so that the outer terminal 12 and the braided tube 19 are electrically connected.
  • the pair of braid crimping pieces 12b and the pair of sheath crimping pieces 12c are shown in a crimped shape.
  • the inner housing 13 is made of synthetic resin and formed into an elliptical cylinder. Inside the inner housing 13, a pair of left and right terminal accommodating chambers 13a are provided, into which female inner terminals 14 connected to the ends 17a of the shielded electric wires 17 are inserted. The female inner terminals 14 accommodated in each terminal accommodating chamber 13a are held by locking portions (not shown). At the center of the rear sides of the upper and lower surfaces 13b and 13c of the inner housing 13, engagement grooves 13d are formed, into which a pair of upper and lower engagement protrusions 15b of a synthetic resin matching part 15, described later, are press-fitted.
  • the metallic female inner terminal 14 has a contact portion 14a at one end to which the male inner terminal 29 of the male connector 20 is connected, and a pair of core wire crimping pieces 14b at the other end to which the core wire 18a exposed from the insulating coating 18b of the inner wire 18 of the shielded wire 17 is connected. Note that in the female inner terminal 14 shown in Figure 4, the pair of core wire crimping pieces 14b are shown in a crimped shape.
  • the synthetic resin matching part 15 is a dielectric for impedance adjustment, and is interposed between the inner housing 13 and the inner sleeve 16A to suppress impedance mismatching and improve the transmission performance of the female connector 10.
  • the matching part 15 is formed in a cylindrical shape with a pair of insertion holes 15a through which the untwisted parts of the two internal electric wires 18 crimped and connected to the female inner terminal 14 are inserted.
  • a pair of upper and lower engagement protrusions (engagement parts) 15b protrude from the front center of the matching part 15, which are pressed into a pair of upper and lower engagement grooves 13d of the inner housing 13.
  • the engagement grooves 13d and the engagement protrusions 15b form an engagement part that integrates the inner housing 13 and the matching part 15.
  • the matching part 15 may be made of a metal member, which is a conductor, instead of a synthetic resin member, which is a dielectric.
  • the metal inner sleeve 16A is formed in a C-shaped plate shape before being crimped, and is attached by crimping to the outer circumference of the braided tube 19 exposed by removing a portion of the sheath 17B of the shielded electric wire 17.
  • the braided tube 19b folded back at the fold back portion 19a is positioned adjacent to the front end edge of the sheath crimping piece 12c from the inner front side of the braided crimping piece 12b when it is crimped by the braided crimping piece 12b of the outer terminal 12.
  • the braided tube 19 is folded back at the fold back portion 19a at the front end portion 16a of the inner sleeve 16A, which is crimped into a cylindrical shape.
  • the braided tube 19b folded back at the fold back portion 19a covers the outer circumference of the cylindrical inner sleeve 16A.
  • the braided crimping piece 12b and the sheath crimping piece 12c are covered and held by the outer sleeve 16B. Noise generated at the point where the braided tube 19 is crimped by the braided crimp piece 12b enters the housing 2 through the opening 7 provided in the cover 6 of the housing 2 that houses the wiring board 40.
  • the shielded electric wire 17 comprises two twisted internal electric wires 18, a metallic braided tube 19 that covers the two internal electric wires 18 via a shielding foil 17A, and a sheath 17B that is an external coating made of synthetic resin and covers the braided tube 19.
  • each internal electric wire 18 has a metallic core wire 18a and a synthetic resin insulating coating 18b that covers the core wire 18a.
  • the two internal electric wires 18 exposed from the insulating coating 18b at the terminal 17a side of the shielded electric wire 17 are untwisted.
  • a pair of core wire crimping pieces 14b are crimped and connected to the core wire 18a exposed from the insulating coating 18b by crimping.
  • the male connector 20 comprises a synthetic resin outer housing (housing) 21, a metal shield shell 24, an inner housing 28, a male inner terminal 29, and a pair of metal earth pieces 30.
  • the outer housing 21 is formed in a rectangular tube shape from synthetic resin. As shown in Figures 1, 7A, and 7B, the outer housing 21 accommodates and fits the female outer housing 11 on the upper side, and the main body 25 of the shield shell 24 on the lower side. As shown in Figures 3 and 5, a locking portion 21a is formed on the upper edge of the inner surface of the outer housing 21. As shown in Figure 7A, when the female connector 10 and the male connector 20 are mated, the locking portion 11d of the lock arm 11c of the female connector 10 and the locking portion 21a of the outer housing 21 of the male connector 20 are locked together, and the mated state of the female connector 10 and the male connector 20 is maintained.
  • the outer housing 21 has long groove-shaped slits 22 extending in the up-down direction on a pair of opposing side portions 21b. Stabilizer portions (protrusions) 27 of the shield shell 24, described later, are inserted into the pair of slits 22. One end (the base portion 26 side of the shield shell 24) of each slit 22 is open.
  • the outer housing 21 has a frame portion 23 adjacent to each slit 22 into which a rectangular plate-shaped insertion portion 31 of an earth piece 30, described later, is inserted. Each frame portion 23 protrudes in a bridge shape (concave shape) from both ends of the side portion 21b of the outer housing 21.
  • the insertion portion 31 of the earth piece 30 is inserted between the side portion 21b and the frame portion 23.
  • the shield shell 24 is a conductive electromagnetic shield. As shown in Figures 7A and 7B, the upper side (one side) of the shield shell 24 is electrically connected to the outer terminal 12, which is the shield terminal of the female connector 10, and the lower side (other side) is installed on the wiring board 40 housed in the housing 2.
  • the shield shell 24 has an elliptical cylindrical (tubular) main body portion 25 in which the outer terminal 12 of the female connector 10 is housed and electrically connected, and a rectangular parallelepiped base portion 26 installed on the wiring board 40.
  • the main body 25 has a connection portion 25a electrically connected to the earth piece 30.
  • the main body 25 also has a stabilizer portion 27 extending in the vertical direction, which protrudes laterally from the connection portion 25a to increase the cross-sectional area (first cross-sectional area S1) of the connection portion 25a.
  • the main body 25 has a narrowed portion 25b having a cross-sectional area (second cross-sectional area S2) that is reduced from the first cross-sectional area in a portion closer to the base portion 26 (wiring board 40) than the connection portion 25a.
  • the main body 25 of the shield shell 24 is formed such that the first cross-sectional area S1 of the connection portion 25a and the stabilizer portion 27 is larger than the second cross-sectional area S2 of the narrowed portion 25b, which is the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a.
  • the first cross-sectional area S1 and the second cross-sectional area S2 are cross-sectional areas perpendicular to the axial direction of the shield shell 24 (main body 25).
  • the base portion 26 is formed with a housing accommodating portion 26a for accommodating the inner housing 28 so as to communicate with the main body portion 25.
  • Cylindrical leg portions 26b for grounding are provided protruding from the center of the bottom surface of the base portion 26 to the four rear corners.
  • the front surface of the synthetic resin inner housing 28 is formed into an elliptical cylinder. Inside the inner housing 28, a pair of terminal accommodating chambers 28a into which male inner terminals 29 are inserted are provided.
  • the metallic male inner terminal 29 is formed from a conductive rod-shaped member. As shown in FIG. 7B, the male inner terminal 29 has a tip end 29a connected to the contact portion 14a of the female inner terminal 14 and a base end 29b connected to the wiring board 40. As shown in FIG. 7B, when the male connector 20 is mounted on the wiring board 40, the base end 29b of the male inner terminal 29 is inserted into a communication circuit hole 42, which serves as a through-hole for communication in the wiring board 40, and connected by soldering.
  • the earth piece 30 is formed from a conductive plate material. As shown in Figs. 5, 7A, and 7B, the earth piece 30 is an elastic spring piece that is electrically connected to the shield shell 24 and is earthed to the lower surface (wall surface) 6b of the lid body 6 of the housing 2.
  • the earth piece 30 has a rectangular plate-shaped insertion portion 31 that is inserted into the frame portion 23, and a rectangular plate-shaped inclined portion 32 that is bent outward in a V-shape from the upper edge of the insertion portion 31.
  • the inclined portion 32 is provided with a convex contact portion 33.
  • the contact portion 33 is pressed against and comes into contact with the lower surface 6b of the lid body 6 of the housing 2, so that the earth piece 30 is electrically connected to the lid body 6.
  • the insertion portion 31 is inserted into the frame portion 23, so that the insertion portion 31 comes into contact with the stabilizer portion 27, and the earth piece 30 is electrically connected to the shield shell 24.
  • L1 is the distance of the first conductive path through which noise flows from the contact T between the outer terminal 12 and the stabilizer portion 27 to each contact portion 33 of the pair of earth pieces 30 that contact the underside 6b of the cover body 6.
  • L2 is the distance of the second conductive path through which noise flows from the contact T between the outer terminal 12 and the stabilizer portion 27 to the contact portion between the leg portion 26b and the wiring board 40.
  • the distance L1 of the first conductive path is set to be shorter than the distance L2 of the second conductive path (L1 ⁇ L2).
  • the wiring board 40 on which the male connector 20 is mounted is a printed wiring board with a multi-layer structure that differentially transmits high-speed signals. That is, the wiring board 40 is formed by stacking, for example, multiple layers of copper ground circuit boards between upper and lower layers of synthetic resin resist, and each insulating board (neither is shown) made of synthetic resin.
  • the wiring board 40 has four ground circuit holes 41 formed as through holes for grounding.
  • a wiring pattern (not shown) for an electromagnetic shield circuit is formed on the lower end side of the four ground circuit holes 41 so as to extend to the other end side of the wiring board 40.
  • the legs 26b are inserted into the ground circuit holes 41 and connected by soldering.
  • the wiring board 40 has two communication circuit holes 42 formed as through holes for communication.
  • a wiring pattern for the communication circuit (not shown) is formed on the lower end side of the two communication circuit holes 42 so as to extend to the other end side of the wiring board 40.
  • the wiring pattern for the communication circuit is used as differential wiring, and is formed by tracing copper foil.
  • the base end 29b of the male inner terminal 29 is inserted into the communication circuit hole 42 and connected by soldering.
  • the housing 2 is a metal case having a metal box-shaped main body 3 consisting of a rectangular bottom wall 4 and four side walls 5 rising from the bottom wall 4, and a rectangular metal lid 6 covering the opening 3a of the main body 3.
  • a metal box-shaped main body 3 consisting of a rectangular bottom wall 4 and four side walls 5 rising from the bottom wall 4, and a rectangular metal lid 6 covering the opening 3a of the main body 3.
  • the lid 6 has a rectangular opening 7 for receiving the male connector 20.
  • the female connector 10 side of the shielded connector 1 is exposed from the opening 7, and the shielded connector 1 is mounted so that it stands vertically.
  • the communication circuit for signals between the mated female connector 10 and male connector 20 employs a differential transmission method.
  • the communication circuit is connected as follows: the internal wire 18, the female inner terminal 14, the male inner terminal 29, and the wiring pattern of the wiring board 40.
  • the shield circuit is connected in the following manner: braided tube 19, outer terminal 12, shield shell 24, earth piece 30, and ground circuit board (not shown) of wiring board 40.
  • Wiring board 40 is attached to bottom wall 4 of housing 2 via hexagonal column-shaped support 8 and screw 9. Support 8 is fixed to bottom wall 4 by pressing small-diameter lower end 8a of support 8 into mounting hole 4a provided in bottom wall 4.
  • the convex contact portion 33 of each of the pair of grounding pieces 30 contacts the lower surface 6b of the cover body 6.
  • the elastic force of the inclined portion 32 of the grounding piece 30 presses the contact portion 33 against the lower surface 6b of the cover body 6, thereby enabling a stable and good ground connection over time.
  • the elliptical cylindrical main body portion 25 of the shield shell 24 of the male connector 20 is inserted and fitted between the terminal accommodating portion 11a of the outer housing 11 of the female connector 10 and the housing accommodating portion 12a of the outer terminal 12.
  • This fitting brings the outer surface of the housing accommodating portion 12a into contact with the stabilizer portion 27 of the main body portion 25 at the contact point T shown in FIG. 7B. If the distance of the first conductive path through which noise flows from the contact T to the contact portion 33 of the ground piece 30 is L1, and the distance of the second conductive path through which noise flows from the contact T to the contact portion between the leg portion 26b of the shield shell 24 and the wiring board 40 is L2, the distance L1 of the first conductive path is shorter than the distance L2 of the second conductive path.
  • the first resistance value (R1) of the first conductive path at the distance L1 can be made smaller than the second resistance value (R2) of the second conductive path at the distance L2. This can sufficiently prevent noise generated from the crimped portion of the braided tube 19 from entering the inside of the housing 2, thereby improving the shielding performance of the shielded connector 1. Therefore, the shielded connector 1 can effectively suppress noise generated by wired communication, enabling high-performance high-speed communication.
  • the main body 25 of the shield shell 24 has a first cross-sectional area S1 of the connection portion 25a, which is the portion connected to the ground piece 30, and the stabilizer portion 27, which is larger than the second cross-sectional area S2 of the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a. That is, the main body 25 has a constricted portion 25b in which the cross-sectional area of the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a, which is the portion connected to the ground piece 30, is reduced. Therefore, the first resistance value R1 of the first conductive path at the distance L1 can be made smaller than the second resistance value R2 of the second conductive path at the distance L2.
  • the shielded connector 1 prevents the effects of strong external electric field noise from weather radar, military radar, etc., and prevents communication problems such as no images being displayed or meters not working properly, enabling stable, high-performance, high-speed communication.
  • a pair of grounding pieces 30 is used, but it is also possible to use a pair of grounding pieces directly attached to opposite sides of a cylindrical metal member.
  • the shielded shell 24 is attached to the male connector 20 side, but the shielded shell 24 may also be attached to the female connector 10 side.
  • the main body 25 and the base 26 of the shielded shell 24 are integrally formed, but the main body 25 and the base 26 may be formed separately to form the shielded shell 24. Also, by providing only one of the stabilizer portion 27 and the constricted portion 25b in the shielded shell 24, the first cross-sectional area S1 of the connection portion 25a of the main body 25 may be made larger than the second cross-sectional area S2 of the main body 25 on the wiring board 40 side.

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Abstract

A shielded connector (1) includes: a shielding shell (24) in which a portion thereof on one side is to be electrically connected to a shield terminal (12) of a mating connector (10) and a portion thereof on the other side is to be disposed on a wiring board (40) accommodated in a case (2); a housing (21) accommodating the shielding shell (24); and grounding lugs (30) which are electrically connected to the shielding shell (24) and are to be grounded to a wall surface (6b) of the case (2). The shielding shell (24) has a connection part (25a) electrically connected to the grounding lugs (30) and has been formed so that the connection part (25a) has a first cross-sectional area which is larger than the second cross-sectional area of a portion located further on the wiring board (40) side than the connection part (25a).

Description

シールドコネクタShielded Connectors
　本発明は、電磁波ノイズ（以下「ノイズ」という）を遮蔽するシールドシェルを備えた高速信号伝送用のシールドコネクタに関する。 The present invention relates to a shielded connector for high-speed signal transmission that is equipped with a shield shell that blocks electromagnetic noise (hereinafter referred to as "noise").
　この種のシールドコネクタとして、特許文献１に記載されたものがある。特許文献１に記載されたコネクタは、基板に取り付けられており、基台と、基台に固定された複数の接続端子と、第１の突出部と、第２の突出部と、導電性を有する金属板によって形成された筒状のハウジング（ケース）と、を備えている。そして、ハウジングの内部に接続端子及び基台を収容し、保護しており、ハウジングの先端部分に連結された第１の突出部及び第２の突出部によって、ハウジングの先端部分からのノイズ放射が抑制される。 One such type of shielded connector is described in Patent Document 1. The connector described in Patent Document 1 is attached to a board and includes a base, a number of connection terminals fixed to the base, a first protrusion, a second protrusion, and a cylindrical housing (case) formed from a conductive metal plate. The connection terminals and base are housed and protected inside the housing, and noise radiation from the tip of the housing is suppressed by the first protrusion and second protrusion connected to the tip of the housing.
特開２０１７－１８８３５３号公報JP 2017-188353 A
　しかしながら、特許文献１のコネクタでは、接続端子から第１の突出部の先端及び第２の突出部の先端に至るまでのノイズが流れる導電経路の距離が、接続端子から基板に至るまでのノイズが流れる導電経路の距離より長くなっているため、ノイズを十分に抑制することが難しい。また、特許文献１に記載されたようなコネクタを実装した電子制御ユニット(ECU：Electronic Control Unit)等を車両に搭載した場合、気象レーダや軍用レーダの近くを車両が通過すると、その強電界のノイズにより、通信に不具合が発生することが考えられる。 However, in the connector of Patent Document 1, the distance of the conductive path through which noise flows from the connection terminal to the tip of the first protrusion and the tip of the second protrusion is longer than the distance of the conductive path through which noise flows from the connection terminal to the board, making it difficult to sufficiently suppress noise. Furthermore, if an electronic control unit (ECU) equipped with a connector such as that described in Patent Document 1 is installed in a vehicle, when the vehicle passes near a weather radar or military radar, it is conceivable that communication problems will occur due to noise from the strong electric field.
　本発明は、このような課題に鑑みてなされたものである。本発明の目的は、電線の端子周辺から発生するノイズが筐体の内部へ侵入することを十分に抑制することができ、かつ、外来の強電界のノイズの影響を防いで安定した通信を行うことができるシールドコネクタを提供することにある。 The present invention was made in consideration of these problems. The object of the present invention is to provide a shielded connector that can sufficiently prevent noise generated around the terminals of the electric wire from penetrating into the inside of the housing, and can prevent the effects of external strong electric field noise, enabling stable communication.
　本発明の態様に係るシールドコネクタは、一側において相手コネクタのシールド端子と電気的に接続され、他側において筐体に収容された配線基板に設置されるシールドシェルと、前記シールドシェルを収容するハウジングと、前記シールドシェルと電気的に接続され、前記筐体の壁面にアース接地されるアース片と、を備え、前記シールドシェルは、前記アース片と電気的に接続される接続部を有し、前記接続部の第１断面積が前記接続部よりも前記配線基板側の部分の第２断面積よりも大きく形成されている。 A shielded connector according to an embodiment of the present invention comprises a shield shell that is electrically connected to a shield terminal of a mating connector on one side and is installed on a wiring board housed in a housing on the other side, a housing that houses the shield shell, and an earth piece that is electrically connected to the shield shell and is earthed to a wall surface of the housing, the shield shell having a connection part that is electrically connected to the earth piece, and a first cross-sectional area of the connection part is larger than a second cross-sectional area of a portion of the connection part that is closer to the wiring board than the wiring board.
　本発明によれば、電線の端子周辺から発生するノイズが筐体の内部へ侵入することを十分に抑制することができ、かつ、外来の強電界のノイズの影響を防いで安定した通信を行うことができるシールドコネクタを提供することができる。 The present invention provides a shielded connector that can adequately prevent noise generated around the terminals of the electric wire from penetrating into the housing, and can prevent the effects of strong external electric field noise, enabling stable communication.
図１は、実施形態に係るシールドコネクタの一例を示す斜視図である。FIG. 1 is a perspective view illustrating an example of a shield connector according to an embodiment. 図２は、実施形態に係るシールドコネクタの雌コネクタの斜視図である。FIG. 2 is a perspective view of a female connector of the shielded connector according to the embodiment. 図３は、実施形態に係るシールドコネクタの雄コネクタの斜視図である。FIG. 3 is a perspective view of a male connector of the shielded connector according to the embodiment. 図４は、実施形態に係るシールドコネクタの雌コネクタの分解斜視図である。FIG. 4 is an exploded perspective view of a female connector of the shielded connector according to the embodiment. 図５は、実施形態に係るシールドコネクタの雄コネクタの分解斜視図である。FIG. 5 is an exploded perspective view of a male connector of the shielded connector according to the embodiment. 図６は、実施形態に係るシールドコネクタが配線基板に実装された状態の斜視図である。FIG. 6 is a perspective view of the shield connector according to the embodiment mounted on a wiring board. 図７Ａは、実施形態に係るシールドコネクタが筐体に収容された状態を示す断面図である。FIG. 7A is a cross-sectional view showing a state in which the shield connector according to the embodiment is housed in a housing. 図７Ｂは、実施形態化に係るシールドコネクタが筐体に収容された状態の要部の拡大断面図である。FIG. 7B is an enlarged cross-sectional view of a main part of the shield connector according to the embodiment when it is housed in a housing.
　以下、図面を用いて実施形態に係るシールドコネクタについて詳細に説明する。 The following describes the shielded connector according to the embodiment in detail using the drawings.
　図１は、実施形態に係るシールドコネクタ１の一例を示す斜視図である。図２は、シールドコネクタ１の雌コネクタ１０の斜視図である。図３は、シールドコネクタ１の雄コネクタ２０の斜視図である。図４は、雌コネクタ１０の分解斜視図である。図５は、雄コネクタ２０の分解斜視図である。図６は、シールドコネクタ１が配線基板４０に実装された状態の斜視図である。図７Ａは、シールドコネクタ１が筐体２に収容された状態を示す断面図である。図７Ｂは、シールドコネクタ１が筐体２に収容された状態の要部の拡大断面図である。 FIG. 1 is a perspective view showing an example of a shielded connector 1 according to an embodiment. FIG. 2 is a perspective view of a female connector 10 of the shielded connector 1. FIG. 3 is a perspective view of a male connector 20 of the shielded connector 1. FIG. 4 is an exploded perspective view of the female connector 10. FIG. 5 is an exploded perspective view of the male connector 20. FIG. 6 is a perspective view of the shielded connector 1 mounted on a wiring board 40. FIG. 7A is a cross-sectional view showing the shielded connector 1 housed in a housing 2. FIG. 7B is an enlarged cross-sectional view of the main parts of the shielded connector 1 housed in a housing 2.
　図１に示すように、シールドコネクタ１は、電磁的なシールド構造を有した高速信号伝送用の高速伝送コネクタであり、雌コネクタ（相手コネクタ）１０と、雌コネクタ１０に嵌合される雄コネクタ（コネクタ）２０と、を備えている。図２、４に示すように、雌コネクタ１０には、ＳＴＰ（Shielded Twisted Pair）電線であるシールド電線１７の端末１７ａ側が接続される。また、図６、７Ａに示すように、雄コネクタ２０は、筐体２内に収容された配線基板４０の上面４０ａに設置される。シールドコネクタ１と配線基板４０と筐体２及び筐体２内に収容される通信機器（不図示）とで通信システム装置Ａが構成される。 As shown in Figure 1, the shielded connector 1 is a high-speed transmission connector for high-speed signal transmission with an electromagnetic shielding structure, and includes a female connector (mating connector) 10 and a male connector (connector) 20 that mates with the female connector 10. As shown in Figures 2 and 4, the terminal 17a of a shielded electric wire 17, which is an STP (Shielded Twisted Pair) electric wire, is connected to the female connector 10. Also, as shown in Figures 6 and 7A, the male connector 20 is installed on the upper surface 40a of a wiring board 40 housed in a housing 2. The shielded connector 1, the wiring board 40, the housing 2, and a communication device (not shown) housed in the housing 2 constitute a communication system device A.
　図２、４に示すように、雌コネクタ１０は、アウタハウジング（相手ハウジング）１１と、アウタ端子１２と、インナハウジング１３と、雌型のインナ端子１４と、整合部品１５と、インナスリーブ１６Ａと、アウタスリーブ１６Ｂと、を備えている。 As shown in Figures 2 and 4, the female connector 10 includes an outer housing (mating housing) 11, an outer terminal 12, an inner housing 13, a female inner terminal 14, an alignment part 15, an inner sleeve 16A, and an outer sleeve 16B.
　図４、７Ｂに示すように、アウタハウジング１１は、合成樹脂により四角筒状に形成され、シールド端子であるアウタ端子１２が収容される端子収容部１１ａを有している。アウタハウジング１１の上面１１ｂ側には、雄コネクタ２０と嵌合した際に嵌合状態を維持するためのロックアーム１１ｃが設けられている。ロックアーム１１ｃには、凸形状の係止部１１ｄが設けられている。 As shown in Figures 4 and 7B, the outer housing 11 is made of synthetic resin and has a rectangular cylindrical shape, and has a terminal accommodating portion 11a that accommodates the outer terminal 12, which is a shield terminal. A lock arm 11c is provided on the upper surface 11b of the outer housing 11 to maintain the mated state when mated with the male connector 20. The lock arm 11c is provided with a protruding engaging portion 11d.
　図４に示すように、シールド端子である金属製のアウタ端子１２は、板金材を用いた板金加工により筒状に形成されている。アウタ端子１２は、インナハウジング１３と整合部品１５を収容するシールド接続部としての筒状のハウジング収容部１２ａを有している。アウタ端子１２は、シールド電線１７のシース１７Ｂの一部が切除されて露出した編組チューブ１９を加締めて接続する一対の編組圧着片１２ｂと、シールド電線１７のシース１７Ｂを加締めて接続する一対のシース圧着片１２ｃと、を有している。 As shown in FIG. 4, the metallic outer terminal 12, which is a shield terminal, is formed into a cylindrical shape by sheet metal processing using a sheet metal material. The outer terminal 12 has a cylindrical housing accommodating portion 12a as a shield connection portion that accommodates the inner housing 13 and the matching part 15. The outer terminal 12 has a pair of braided crimping pieces 12b that crimp and connect the braided tube 19 exposed when a portion of the sheath 17B of the shielded electric wire 17 is cut away, and a pair of sheath crimping pieces 12c that crimp and connect the sheath 17B of the shielded electric wire 17.
　図７Ｂに示すように、編組圧着片１２ｂは、シース１７Ｂから露出した編組チューブ１９の外周に加締められた金属製のインナスリーブ１６Ａを加締める。さらに、編組圧着片１２ｂは、インナスリーブ１６Ａの外周を覆う、折り返し部１９ａで折り返された編組チューブ１９ｂも加締めて接続する。インナスリーブ１６Ａの外周には、折り返し部１９ａで折り返された編組チューブ１９ｂを介して、編組圧着片１２ｂが加締められている。折り返し部１９ａで折り返された編組チューブ１９ｂは、編組圧着片１２ｂとインナスリーブ１６Ａとにより挟持され、かつ、金属製で六角筒状のアウタスリーブ１６Ｂで保持されることで、アウタ端子１２と編組チューブ１９は電気的に接続されている。なお、図４に示しているアウタ端子１２では、一対の編組圧着片１２ｂと一対のシース圧着片１２ｃは、加締められた形状が図示されている。アウタ端子１２が端子収容部１１ａに収容されると、ロックアーム１１ｃがアウタ端子１２の突起部１２ｄに係止されて、アウタ端子１２の収容状態が保持される。 As shown in Figure 7B, the braided crimping piece 12b crimps the metallic inner sleeve 16A which is crimped to the outer periphery of the braided tube 19 exposed from the sheath 17B. Furthermore, the braided crimping piece 12b also crimps and connects the braided tube 19b which is folded back at the fold back portion 19a and covers the outer periphery of the inner sleeve 16A. The braided crimping piece 12b is crimped to the outer periphery of the inner sleeve 16A via the braided tube 19b which is folded back at the fold back portion 19a. The braided tube 19b which is folded back at the fold back portion 19a is clamped between the braided crimping piece 12b and the inner sleeve 16A, and is held by the metallic hexagonal cylindrical outer sleeve 16B, so that the outer terminal 12 and the braided tube 19 are electrically connected. In addition, in the outer terminal 12 shown in Figure 4, the pair of braid crimping pieces 12b and the pair of sheath crimping pieces 12c are shown in a crimped shape. When the outer terminal 12 is accommodated in the terminal accommodation portion 11a, the lock arm 11c is engaged with the protrusion portion 12d of the outer terminal 12, and the accommodation state of the outer terminal 12 is maintained.
　図４に示すように、インナハウジング１３は、合成樹脂により楕円柱状に形成されていている。インナハウジング１３の内部には、シールド電線１７の端末１７ａに接続した雌型のインナ端子１４が挿入される左右一対の端子収容室１３ａが設けられている。各端子収容室１３ａ内に収容された雌型のインナ端子１４は、係止部（不図示）により保持されている。インナハウジング１３の上面１３ｂと下面１３ｃの後側の中央には、後述する合成樹脂製の整合部品１５の上下一対の係合突起１５ｂが圧入する係合溝１３ｄがそれぞれ形成されている。 As shown in FIG. 4, the inner housing 13 is made of synthetic resin and formed into an elliptical cylinder. Inside the inner housing 13, a pair of left and right terminal accommodating chambers 13a are provided, into which female inner terminals 14 connected to the ends 17a of the shielded electric wires 17 are inserted. The female inner terminals 14 accommodated in each terminal accommodating chamber 13a are held by locking portions (not shown). At the center of the rear sides of the upper and lower surfaces 13b and 13c of the inner housing 13, engagement grooves 13d are formed, into which a pair of upper and lower engagement protrusions 15b of a synthetic resin matching part 15, described later, are press-fitted.
　金属製の雌型のインナ端子１４は、一端側に雄コネクタ２０の雄型のインナ端子２９が接続される接触部１４ａと、他端側にシールド電線１７の内部電線１８の絶縁被覆１８ｂより露出した芯線１８ａに接続される一対の芯線圧着片１４ｂと、を有している。なお、図４に示している雌型のインナ端子１４では、一対の芯線圧着片１４ｂは、加締められた形状が示されている。 The metallic female inner terminal 14 has a contact portion 14a at one end to which the male inner terminal 29 of the male connector 20 is connected, and a pair of core wire crimping pieces 14b at the other end to which the core wire 18a exposed from the insulating coating 18b of the inner wire 18 of the shielded wire 17 is connected. Note that in the female inner terminal 14 shown in Figure 4, the pair of core wire crimping pieces 14b are shown in a crimped shape.
　図４に示すように、合成樹脂製の整合部品１５は、インピーダンス調整用の誘電体であり、インナハウジング１３とインナスリーブ１６Ａとの間に介装されて、インピーダンス不整合を抑制して雌コネクタ１０の伝送性能を向上させるためのものである。整合部品１５は、雌型のインナ端子１４に圧着接続された２本の内部電線１８の撚りが解かれた部分が挿通する、一対の挿通孔１５ａを有した筒状に形成されている。整合部品１５の中央の前方には、インナハウジング１３の上下一対の係合溝１３ｄに圧入する、上下一対の係合突起（係合部）１５ｂが突設されている。係合溝１３ｄと係合突起１５ｂは、インナハウジング１３と整合部品１５を一体化させる係合部を構成している。なお、整合部品１５は、誘電体である合成樹脂製の部材の代わりに、導電体である金属製の部材を用いても良い。 As shown in FIG. 4, the synthetic resin matching part 15 is a dielectric for impedance adjustment, and is interposed between the inner housing 13 and the inner sleeve 16A to suppress impedance mismatching and improve the transmission performance of the female connector 10. The matching part 15 is formed in a cylindrical shape with a pair of insertion holes 15a through which the untwisted parts of the two internal electric wires 18 crimped and connected to the female inner terminal 14 are inserted. A pair of upper and lower engagement protrusions (engagement parts) 15b protrude from the front center of the matching part 15, which are pressed into a pair of upper and lower engagement grooves 13d of the inner housing 13. The engagement grooves 13d and the engagement protrusions 15b form an engagement part that integrates the inner housing 13 and the matching part 15. Note that the matching part 15 may be made of a metal member, which is a conductor, instead of a synthetic resin member, which is a dielectric.
　金属製のインナスリーブ１６Ａは、加締められる前の形状がＣ字板状に形成されており、シールド電線１７のシース１７Ｂの一部が切除されて露出した編組チューブ１９の外周に加締めて取り付けられている。図７Ｂに示すように、折り返し部１９ａで折り返された編組チューブ１９ｂは、アウタ端子１２の編組圧着片１２ｂにより加締められる際に、編組圧着片１２ｂの内側の前側からシース圧着片１２ｃの前端縁に隣接する位置に配置されている。つまり、編組チューブ１９は、円筒状に加締められたインナスリーブ１６Ａの前端部１６ａで折り返し部１９ａにより折り返される。折り返し部１９ａで折り返された編組チューブ１９ｂは、円筒状のインナスリーブ１６Ａの外周を覆っている。編組圧着片１２ｂ及びシース圧着片１２ｃは、アウタスリーブ１６Ｂで覆われて保持されている。編組チューブ１９が編組圧着片１２ｂで加締められた箇所で発生したノイズが、配線基板４０が収容された筐体２の蓋体６に設けられた開口部７を経て筐体２内へ侵入する。 The metal inner sleeve 16A is formed in a C-shaped plate shape before being crimped, and is attached by crimping to the outer circumference of the braided tube 19 exposed by removing a portion of the sheath 17B of the shielded electric wire 17. As shown in FIG. 7B, the braided tube 19b folded back at the fold back portion 19a is positioned adjacent to the front end edge of the sheath crimping piece 12c from the inner front side of the braided crimping piece 12b when it is crimped by the braided crimping piece 12b of the outer terminal 12. In other words, the braided tube 19 is folded back at the fold back portion 19a at the front end portion 16a of the inner sleeve 16A, which is crimped into a cylindrical shape. The braided tube 19b folded back at the fold back portion 19a covers the outer circumference of the cylindrical inner sleeve 16A. The braided crimping piece 12b and the sheath crimping piece 12c are covered and held by the outer sleeve 16B. Noise generated at the point where the braided tube 19 is crimped by the braided crimp piece 12b enters the housing 2 through the opening 7 provided in the cover 6 of the housing 2 that houses the wiring board 40.
　図４、７Ｂに示すように、シールド電線１７は、撚られている２本の内部電線１８と、シールド箔１７Ａを介して２本の内部電線１８を覆う金属製の編組チューブ１９と、編組チューブ１９を覆う合成樹脂製の外部被覆であるシース１７Ｂと、を備えている。図１、４に示すように、各々の内部電線１８は、金属製の芯線１８ａと、芯線１８ａを覆う合成樹脂製の絶縁被覆１８ｂと、を有している。シールド電線１７の端末１７ａ側で絶縁被覆１８ｂから露出した２本の内部電線１８は、撚りが解かれている。一対の芯線圧着片１４ｂは、絶縁被覆１８ｂより露出した芯線１８ａに加締めにより圧着接続されている。 As shown in Figures 4 and 7B, the shielded electric wire 17 comprises two twisted internal electric wires 18, a metallic braided tube 19 that covers the two internal electric wires 18 via a shielding foil 17A, and a sheath 17B that is an external coating made of synthetic resin and covers the braided tube 19. As shown in Figures 1 and 4, each internal electric wire 18 has a metallic core wire 18a and a synthetic resin insulating coating 18b that covers the core wire 18a. The two internal electric wires 18 exposed from the insulating coating 18b at the terminal 17a side of the shielded electric wire 17 are untwisted. A pair of core wire crimping pieces 14b are crimped and connected to the core wire 18a exposed from the insulating coating 18b by crimping.
　図３、５に示すように、雄コネクタ２０は、合成樹脂のアウタハウジング（ハウジング）２１と、金属製のシールドシェル２４と、インナハウジング２８と、雄型のインナ端子２９と、金属製の一対のアース片３０と、を備えている。 As shown in Figures 3 and 5, the male connector 20 comprises a synthetic resin outer housing (housing) 21, a metal shield shell 24, an inner housing 28, a male inner terminal 29, and a pair of metal earth pieces 30.
　図３、５に示すように、アウタハウジング２１は、合成樹脂により四角筒状に形成されている。図１、７Ａ、７Ｂに示すように、アウタハウジング２１は、上側に雌型のアウタハウジング１１が収容されて嵌合され、下側にシールドシェル２４の本体部２５が収容される。図３、５に示すように、アウタハウジング２１の内面の上縁には、被係止部２１ａが形成されている。図７Ａに示すように、雌コネクタ１０と雄コネクタ２０とが嵌合すると、雌コネクタ１０のロックアーム１１ｃの係止部１１ｄと雄コネクタ２０のアウタハウジング２１の被係止部２１ａとが係止されて、雌コネクタ１０と雄コネクタ２０の嵌合状態が保持される。 As shown in Figures 3 and 5, the outer housing 21 is formed in a rectangular tube shape from synthetic resin. As shown in Figures 1, 7A, and 7B, the outer housing 21 accommodates and fits the female outer housing 11 on the upper side, and the main body 25 of the shield shell 24 on the lower side. As shown in Figures 3 and 5, a locking portion 21a is formed on the upper edge of the inner surface of the outer housing 21. As shown in Figure 7A, when the female connector 10 and the male connector 20 are mated, the locking portion 11d of the lock arm 11c of the female connector 10 and the locking portion 21a of the outer housing 21 of the male connector 20 are locked together, and the mated state of the female connector 10 and the male connector 20 is maintained.
　図５に示すように、アウタハウジング２１は、相対向する一対の側部２１ｂに長溝状のスリット２２を上下方向に延びるようにそれぞれ有している。一対のスリット２２には、後述するシールドシェル２４のスタビライザ部（突出部）２７が挿通される。各々のスリット２２は、一端（シールドシェル２４のベース部２６側）が開放されている。アウタハウジング２１は、各々のスリット２２に隣接して後述するアース片３０の矩形板状の挿入部３１が挿入される枠部２３を有している。各々の枠部２３は、アウタハウジング２１の側部２１ｂの両端側からブリッジ状（凹状）に突出している。側部２１ｂと枠部２３との間には、アース片３０の挿入部３１が挿入されるようになっている。 As shown in FIG. 5, the outer housing 21 has long groove-shaped slits 22 extending in the up-down direction on a pair of opposing side portions 21b. Stabilizer portions (protrusions) 27 of the shield shell 24, described later, are inserted into the pair of slits 22. One end (the base portion 26 side of the shield shell 24) of each slit 22 is open. The outer housing 21 has a frame portion 23 adjacent to each slit 22 into which a rectangular plate-shaped insertion portion 31 of an earth piece 30, described later, is inserted. Each frame portion 23 protrudes in a bridge shape (concave shape) from both ends of the side portion 21b of the outer housing 21. The insertion portion 31 of the earth piece 30 is inserted between the side portion 21b and the frame portion 23.
　シールドシェル２４は、導電性の電磁遮蔽体である。図７Ａ、７Ｂに示すように、シールドシェル２４は、上側（一側）において雌コネクタ１０のシールド端子であるアウタ端子１２と電気的に接続され、下側（他側）において筐体２に収容された配線基板４０に設置される。シールドシェル２４は、雌コネクタ１０のアウタ端子１２が収容されて電気的に接続される楕円筒状（筒状）の本体部２５と、配線基板４０に設置される直方体状のベース部２６と、を有している。 The shield shell 24 is a conductive electromagnetic shield. As shown in Figures 7A and 7B, the upper side (one side) of the shield shell 24 is electrically connected to the outer terminal 12, which is the shield terminal of the female connector 10, and the lower side (other side) is installed on the wiring board 40 housed in the housing 2. The shield shell 24 has an elliptical cylindrical (tubular) main body portion 25 in which the outer terminal 12 of the female connector 10 is housed and electrically connected, and a rectangular parallelepiped base portion 26 installed on the wiring board 40.
　図３、５に示すように、本体部２５は、アース片３０と電気的に接続される接続部２５ａを有する。また、本体部２５は、接続部２５ａから側方に突出することで接続部２５ａの断面積（第１断面積Ｓ１とする）を増加させるスタビライザ部２７を上下方向に延びるように有している。さらに、本体部２５は、接続部２５ａよりもベース部２６（配線基板４０）側の部分において、第１断面積よりも減少された断面積（第２断面積Ｓ２とする）を有するくびれ部２５ｂを有する。つまり、シールドシェル２４の本体部２５は、接続部２５ａとスタビライザ部２７の第１断面積Ｓ１が接続部２５ａよりもベース部２６（配線基板４０）側の部分であるくびれ部２５ｂの第２断面積Ｓ２よりも大きく形成されている。なお、第１断面積Ｓ１と第２断面積Ｓ２は、シールドシェル２４（本体部２５）の軸方向に直交する方向の断面積である。 3 and 5, the main body 25 has a connection portion 25a electrically connected to the earth piece 30. The main body 25 also has a stabilizer portion 27 extending in the vertical direction, which protrudes laterally from the connection portion 25a to increase the cross-sectional area (first cross-sectional area S1) of the connection portion 25a. Furthermore, the main body 25 has a narrowed portion 25b having a cross-sectional area (second cross-sectional area S2) that is reduced from the first cross-sectional area in a portion closer to the base portion 26 (wiring board 40) than the connection portion 25a. In other words, the main body 25 of the shield shell 24 is formed such that the first cross-sectional area S1 of the connection portion 25a and the stabilizer portion 27 is larger than the second cross-sectional area S2 of the narrowed portion 25b, which is the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a. The first cross-sectional area S1 and the second cross-sectional area S2 are cross-sectional areas perpendicular to the axial direction of the shield shell 24 (main body 25).
　図７Ｂに示すように、ベース部２６には、インナハウジング２８を収容するためのハウジング収容部２６ａが本体部２５に連通するように形成されている。ベース部２６の底面の中央から後側の四隅には、接地用で円柱状の脚部２６ｂがそれぞれ突設されている。雄コネクタ２０を配線基板４０に実装する際に、脚部２６ｂが配線基板４０のグランド用のスルーホールとしてのグランド回路孔４１に挿入されて半田付けにて接続される。 As shown in FIG. 7B, the base portion 26 is formed with a housing accommodating portion 26a for accommodating the inner housing 28 so as to communicate with the main body portion 25. Cylindrical leg portions 26b for grounding are provided protruding from the center of the bottom surface of the base portion 26 to the four rear corners. When the male connector 20 is mounted on the wiring board 40, the leg portions 26b are inserted into the ground circuit holes 41, which serve as ground through holes in the wiring board 40, and connected by soldering.
　図５に示すように、合成樹脂製のインナハウジング２８は、前面が楕円柱状に形成されている。インナハウジング２８の内部には、雄型のインナ端子２９が挿入される一対の端子収容室２８ａが設けられている。 As shown in FIG. 5, the front surface of the synthetic resin inner housing 28 is formed into an elliptical cylinder. Inside the inner housing 28, a pair of terminal accommodating chambers 28a into which male inner terminals 29 are inserted are provided.
　図５に示すように、金属製の雄型のインナ端子２９は、導電性の棒状部材により形成されている。図７Ｂに示すように、雄型のインナ端子２９は、先端部２９ａが雌型のインナ端子１４の接触部１４ａに接続されると共に、基端部２９ｂが配線基板４０に接続される。図７Ｂに示すように、雄コネクタ２０を配線基板４０に実装する際に、雄型のインナ端子２９の基端部２９ｂが配線基板４０の通信用のスルーホールとしての通信回路孔４２に挿入されて半田付けにて接続される。 As shown in FIG. 5, the metallic male inner terminal 29 is formed from a conductive rod-shaped member. As shown in FIG. 7B, the male inner terminal 29 has a tip end 29a connected to the contact portion 14a of the female inner terminal 14 and a base end 29b connected to the wiring board 40. As shown in FIG. 7B, when the male connector 20 is mounted on the wiring board 40, the base end 29b of the male inner terminal 29 is inserted into a communication circuit hole 42, which serves as a through-hole for communication in the wiring board 40, and connected by soldering.
　アース片３０は、導電性の板材より形成されている。図５、７Ａ、７Ｂに示すように、アース片３０は、シールドシェル２４と電気的に接続され、筐体２の蓋体６の下面（壁面）６ｂにアース接地される弾性を有したバネ片である。アース片３０は、枠部２３に挿入される矩形板状の挿入部３１と、挿入部３１の上端縁から外側にＶ字状に折り曲げ形成された矩形板状の傾斜部３２と、を有している。傾斜部３２には、凸状の接点部３３が設けられている。接点部３３が筐体２の蓋体６の下面６ｂに押圧付勢されて接触することで、アース片３０が蓋体６と電気的に接続される。挿入部３１は、枠部２３に挿入されることで、スタビライザ部２７と接触して、アース片３０がシールドシェル２４と電気的に接続される。 The earth piece 30 is formed from a conductive plate material. As shown in Figs. 5, 7A, and 7B, the earth piece 30 is an elastic spring piece that is electrically connected to the shield shell 24 and is earthed to the lower surface (wall surface) 6b of the lid body 6 of the housing 2. The earth piece 30 has a rectangular plate-shaped insertion portion 31 that is inserted into the frame portion 23, and a rectangular plate-shaped inclined portion 32 that is bent outward in a V-shape from the upper edge of the insertion portion 31. The inclined portion 32 is provided with a convex contact portion 33. The contact portion 33 is pressed against and comes into contact with the lower surface 6b of the lid body 6 of the housing 2, so that the earth piece 30 is electrically connected to the lid body 6. The insertion portion 31 is inserted into the frame portion 23, so that the insertion portion 31 comes into contact with the stabilizer portion 27, and the earth piece 30 is electrically connected to the shield shell 24.
　図７Ｂに示すように、アウタ端子１２とスタビライザ部２７の接点Ｔから蓋体６の下面６ｂに接触する一対のアース片３０の各々の接点部３３までのノイズが流れる第１導電経路の距離をＬ１とする。また、アウタ端子１２とスタビライザ部２７の接点Ｔから脚部２６ｂと配線基板４０の接触部分までのノイズが流れる第２導電経路の距離をＬ２とする。そして、第１導電経路の距離Ｌ１が第２導電経路の距離Ｌ２より短くなる（Ｌ１＜Ｌ２）ように設定されている。 As shown in Figure 7B, L1 is the distance of the first conductive path through which noise flows from the contact T between the outer terminal 12 and the stabilizer portion 27 to each contact portion 33 of the pair of earth pieces 30 that contact the underside 6b of the cover body 6. L2 is the distance of the second conductive path through which noise flows from the contact T between the outer terminal 12 and the stabilizer portion 27 to the contact portion between the leg portion 26b and the wiring board 40. The distance L1 of the first conductive path is set to be shorter than the distance L2 of the second conductive path (L1 < L2).
　雄コネクタ２０が実装される配線基板４０は、プリント配線基板であり、高速信号を差動伝送する多層構造である。すなわち、配線基板４０は、例えば、上下層の合成樹脂製のレジストとの間に銅製で複数層のグランド回路板を合成樹脂製の各絶縁性基板（いずれも図示省略）を挟んで積層形成されている。 The wiring board 40 on which the male connector 20 is mounted is a printed wiring board with a multi-layer structure that differentially transmits high-speed signals. That is, the wiring board 40 is formed by stacking, for example, multiple layers of copper ground circuit boards between upper and lower layers of synthetic resin resist, and each insulating board (neither is shown) made of synthetic resin.
　図７Ｂに示すように、配線基板４０には、グランド用のスルーホールとしてのグランド回路孔４１が４箇所形成されている。４箇所のグランド回路孔４１の下端側には、電磁シールド回路用の配線パターン（図示省略）が配線基板４０の他端側に延びるように形成されている。グランド回路孔４１には、脚部２６ｂが挿入されて半田付けにて接続される。 As shown in FIG. 7B, the wiring board 40 has four ground circuit holes 41 formed as through holes for grounding. A wiring pattern (not shown) for an electromagnetic shield circuit is formed on the lower end side of the four ground circuit holes 41 so as to extend to the other end side of the wiring board 40. The legs 26b are inserted into the ground circuit holes 41 and connected by soldering.
　図７Ｂに示すように、配線基板４０には、通信用のスルーホールとしての通信回路孔４２が２箇所形成されている。２箇所の通信回路孔４２の下端側には、通信回路用の配線パターン（図示省略）が配線基板４０の他端側に延びるように形成されている。通信回路用の配線パターンは、差動配線として用いられるものであり、銅箔をトレースしてなる。通信回路孔４２には、雄型のインナ端子２９の基端部２９ｂが挿入されて半田付けにて接続される。 As shown in FIG. 7B, the wiring board 40 has two communication circuit holes 42 formed as through holes for communication. A wiring pattern for the communication circuit (not shown) is formed on the lower end side of the two communication circuit holes 42 so as to extend to the other end side of the wiring board 40. The wiring pattern for the communication circuit is used as differential wiring, and is formed by tracing copper foil. The base end 29b of the male inner terminal 29 is inserted into the communication circuit hole 42 and connected by soldering.
　図７Ａ、７Ｂに示すように、筐体２は、矩形の底壁４と該底壁４から起立した４つの側壁５から成る金属製の箱形の本体３と、この本体３の開口３ａを覆う金属製の矩形の蓋体６と、を有した金属製のケースである。筐体２の内部には、配線基板４０及び配線基板４０に実装された雄コネクタ２０の他に、高速信号伝送用の電子機器（図示省略）等が収容される。蓋体６には、雄コネクタ２０を受容する矩形の開口部７が形成されている。シールドコネクタ１の雌コネクタ１０側が開口部７から露出して、シールドコネクタ１が垂直に起立するように装着される。嵌合された雌コネクタ１０と雄コネクタ２０の信号の通信回路は、差動伝送方式を採用している。通信回路は、内部電線１８、雌型のインナ端子１４、雄型のインナ端子２９、配線基板４０の配線パターンのように接続される。シールド回路は、編組チューブ１９、アウタ端子１２、シールドシェル２４及びアース片３０、配線基板４０のグランド回路板（不図示）のように接続される。配線基板４０は、筐体２の底壁４に六角柱状の支柱８とビス９を介して取り付けられる。支柱８の小径の下端部８ａが底壁４に設けられた取付孔４ａに圧入されることで、支柱８は底壁４に固定される。 7A and 7B, the housing 2 is a metal case having a metal box-shaped main body 3 consisting of a rectangular bottom wall 4 and four side walls 5 rising from the bottom wall 4, and a rectangular metal lid 6 covering the opening 3a of the main body 3. Inside the housing 2, in addition to the wiring board 40 and the male connector 20 mounted on the wiring board 40, electronic devices for high-speed signal transmission (not shown) and the like are housed. The lid 6 has a rectangular opening 7 for receiving the male connector 20. The female connector 10 side of the shielded connector 1 is exposed from the opening 7, and the shielded connector 1 is mounted so that it stands vertically. The communication circuit for signals between the mated female connector 10 and male connector 20 employs a differential transmission method. The communication circuit is connected as follows: the internal wire 18, the female inner terminal 14, the male inner terminal 29, and the wiring pattern of the wiring board 40. The shield circuit is connected in the following manner: braided tube 19, outer terminal 12, shield shell 24, earth piece 30, and ground circuit board (not shown) of wiring board 40. Wiring board 40 is attached to bottom wall 4 of housing 2 via hexagonal column-shaped support 8 and screw 9. Support 8 is fixed to bottom wall 4 by pressing small-diameter lower end 8a of support 8 into mounting hole 4a provided in bottom wall 4.
　以上、実施形態のシールドコネクタ１によれば、図７Ａに示すように、筐体２の内部の配線基板４０上にシールドコネクタ１が実装されると、一対のアース片３０の各々の凸状の接点部３３が蓋体６の下面６ｂに接触する。この際、アース片３０の傾斜部３２の弾性力による押圧付勢により接点部３３が蓋体６の下面６ｂに確実に接地するため、経時的に安定した良好な接地接続が可能となる。また、雌コネクタ１０のアウタハウジング１１の端子収容部１１ａとアウタ端子１２のハウジング収容部１２ａの間に、雄コネクタ２０のシールドシェル２４の楕円筒状の本体部２５が挿入されて嵌め込まれる。この嵌め込みにより、ハウジング収容部１２ａの外面と本体部２５のスタビライザ部２７が図７Ｂで示す接点Ｔで接触する。接点Ｔからアース片３０の接点部３３までのノイズが流れる第１導電経路の距離をＬ１とし、接点Ｔからシールドシェル２４の脚部２６ｂと配線基板４０の接触部分までのノイズが流れる第２導電経路の距離をＬ２とすると、第１導電経路の距離Ｌ１が第２導電経路の距離Ｌ２より短くなっている。第１導電経路の距離Ｌ１が第２導電経路の距離Ｌ２より短くなることで、距離Ｌ１の第１導電経路の第１抵抗値（Ｒ１とする）を距離Ｌ２の第２導電経路の第２抵抗値（Ｒ２とする）よりも小さくすることができる。これにより、編組チューブ１９の加締め部分から発生するノイズが筐体２の内部へ侵入することを十分に抑制することができるため、シールドコネクタ１のシールド性能を向上させることができる。よって、シールドコネクタ１は、有線の通信によって生じるノイズを効果的に抑制することができ、高性能な高速通信が可能となる。 As described above, according to the embodiment of the shielded connector 1, when the shielded connector 1 is mounted on the wiring board 40 inside the housing 2, as shown in FIG. 7A, the convex contact portion 33 of each of the pair of grounding pieces 30 contacts the lower surface 6b of the cover body 6. At this time, the elastic force of the inclined portion 32 of the grounding piece 30 presses the contact portion 33 against the lower surface 6b of the cover body 6, thereby enabling a stable and good ground connection over time. In addition, the elliptical cylindrical main body portion 25 of the shield shell 24 of the male connector 20 is inserted and fitted between the terminal accommodating portion 11a of the outer housing 11 of the female connector 10 and the housing accommodating portion 12a of the outer terminal 12. This fitting brings the outer surface of the housing accommodating portion 12a into contact with the stabilizer portion 27 of the main body portion 25 at the contact point T shown in FIG. 7B. If the distance of the first conductive path through which noise flows from the contact T to the contact portion 33 of the ground piece 30 is L1, and the distance of the second conductive path through which noise flows from the contact T to the contact portion between the leg portion 26b of the shield shell 24 and the wiring board 40 is L2, the distance L1 of the first conductive path is shorter than the distance L2 of the second conductive path. By making the distance L1 of the first conductive path shorter than the distance L2 of the second conductive path, the first resistance value (R1) of the first conductive path at the distance L1 can be made smaller than the second resistance value (R2) of the second conductive path at the distance L2. This can sufficiently prevent noise generated from the crimped portion of the braided tube 19 from entering the inside of the housing 2, thereby improving the shielding performance of the shielded connector 1. Therefore, the shielded connector 1 can effectively suppress noise generated by wired communication, enabling high-performance high-speed communication.
　また、シールドコネクタ１では、シールドシェル２４の本体部２５は、アース片３０と接続される部分である接続部２５ａとスタビライザ部２７の第１断面積Ｓ１を接続部２５ａよりベース部２６（配線基板４０）側の部分の第２断面積Ｓ２よりも大きくしている。すなわち、本体部２５は、アース片３０と接続される部分である接続部２５ａよりもベース部２６（配線基板４０）側の部分の断面積が減少されたくびれ部２５ｂを有している。このため、距離Ｌ１の第１導電経路の第１抵抗値Ｒ１を距離Ｌ２の第２導電経路の第２抵抗値Ｒ２よりも小さくすることができる。これにより、シールド電線１７の編組チューブ１９の加締め部分から発生するノイズが筐体２の内部へ侵入することを十分に抑制することができ、シールドコネクタ１のシールド性能を向上させることができる。さらに、シールドコネクタ１によれば、気象レーダや軍用レーダ等の外来の強電界のノイズの影響を防ぎ、例えば、映像が映らない、メータが正常に作動しない等の通信不具合の発生を防ぐことができて安定した高性能な高速通信が可能となる。 In addition, in the shielded connector 1, the main body 25 of the shield shell 24 has a first cross-sectional area S1 of the connection portion 25a, which is the portion connected to the ground piece 30, and the stabilizer portion 27, which is larger than the second cross-sectional area S2 of the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a. That is, the main body 25 has a constricted portion 25b in which the cross-sectional area of the portion closer to the base portion 26 (wiring board 40) than the connection portion 25a, which is the portion connected to the ground piece 30, is reduced. Therefore, the first resistance value R1 of the first conductive path at the distance L1 can be made smaller than the second resistance value R2 of the second conductive path at the distance L2. This makes it possible to sufficiently prevent noise generated from the crimped portion of the braided tube 19 of the shielded electric wire 17 from entering the inside of the housing 2, thereby improving the shielding performance of the shielded connector 1. Furthermore, the shielded connector 1 prevents the effects of strong external electric field noise from weather radar, military radar, etc., and prevents communication problems such as no images being displayed or meters not working properly, enabling stable, high-performance, high-speed communication.
　以上、本実施形態を説明したが、本実施形態はこれらに限定されるものではなく、本実施形態の要旨の範囲内で種々の変形が可能である。 The present embodiment has been described above, but the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.
　すなわち、実施形態に係るシールドコネクタ１によれば、一対のアース片３０を使用したが、筒状の金属部材の相対向する両側に一対のアース片を直接設けたものを使用しても良い。 In other words, according to the shielded connector 1 of the embodiment, a pair of grounding pieces 30 is used, but it is also possible to use a pair of grounding pieces directly attached to opposite sides of a cylindrical metal member.
　また、実施形態に係るシールドコネクタ１によれば、シールドシェル２４を雄コネクタ２０側に装着したが、シールドシェル２４を雌コネクタ１０側にも装着しても良い。 In addition, according to the shielded connector 1 of the embodiment, the shielded shell 24 is attached to the male connector 20 side, but the shielded shell 24 may also be attached to the female connector 10 side.
　さらに、実施形態に係るシールドコネクタ１によれば、シールドシェル２４の本体部２５とベース部２６を一体に形成したが、本体部２５とベース部２６を別々に形成してシールドシェル２４としても良い。また、シールドシェル２４において、スタビライザ部２７とくびれ部２５ｂのいずれか一方のみを設けることで、本体部２５の接続部２５ａの第１断面積Ｓ１を本体部２５の配線基板４０側の第２断面積Ｓ２より大きく形成しても良い。 Furthermore, in the shielded connector 1 according to the embodiment, the main body 25 and the base 26 of the shielded shell 24 are integrally formed, but the main body 25 and the base 26 may be formed separately to form the shielded shell 24. Also, by providing only one of the stabilizer portion 27 and the constricted portion 25b in the shielded shell 24, the first cross-sectional area S1 of the connection portion 25a of the main body 25 may be made larger than the second cross-sectional area S2 of the main body 25 on the wiring board 40 side.
　特願２０２２－１９７８６７号（出願日：２０２２年１２月１２日）の全内容は、ここに援用される。 The entire contents of Patent Application No. 2022-197867 (filing date: December 12, 2022) are incorporated herein by reference.
　以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、請求の範囲に記載された発明とその均等の範囲に含まれる。 Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, and are included in the scope of the invention and its equivalents as set forth in the claims.
　１　シールドコネクタ
　２　筐体
　６　蓋体
　６ｂ　下面（壁面）
　１０　雌コネクタ（相手コネクタ）
　１２　アウタ端子（シールド端子）
　２０　雄コネクタ（コネクタ）
　２１　アウタハウジング（ハウジング）
　２２　スリット
　２３　枠部
　２４　シールドシェル
　２５　本体部
　２５ａ　接続部
　２５ｂ　くびれ部
　２６　ベース部
　２７　スタビライザ部（突出部）
　３０　アース片
　４０　配線基板 1 Shielded connector 2 Housing 6 Lid 6b Bottom surface (wall surface)
10 Female connector (mating connector)
12 Outer terminal (shield terminal)
20 Male connector (connector)
21 Outer housing (housing)
22 Slit 23 Frame portion 24 Shield shell 25 Main body portion 25a Connection portion 25b Narrowed portion 26 Base portion 27 Stabilizer portion (protruding portion)
30 Earth piece 40 Wiring board

Claims (4)

  1. 　一側において相手コネクタのシールド端子と電気的に接続され、他側において筐体に収容された配線基板に設置されるシールドシェルと、
    　前記シールドシェルを収容するハウジングと、
    　前記シールドシェルと電気的に接続され、前記筐体の壁面にアース接地されるアース片と、
    を備え、
    　前記シールドシェルは、前記アース片と電気的に接続される接続部を有し、前記接続部の第１断面積が前記接続部よりも前記配線基板側の部分の第２断面積より大きく形成されている
    シールドコネクタ。     a shield shell that is electrically connected to a shield terminal of a mating connector at one side and is mounted on a wiring board accommodated in a housing at the other side;
    a housing that accommodates the shield shell;
    an earth piece electrically connected to the shield shell and earthed to a wall surface of the housing;
    Equipped with
    The shielding shell has a connection portion electrically connected to the earth piece, and a first cross-sectional area of the connection portion is larger than a second cross-sectional area of a portion of the connection portion that is closer to the wiring board than the wiring board.
  2. 　前記シールドシェルは、前記接続部から側方に突出することで前記第１断面積を増加させる突出部を有し、
    　前記ハウジングは、前記突出部が挿通されるスリットを有し、
    　前記アース片は、前記スリットに挿通された前記突出部と電気的に接続されている、
    請求項１に記載のシールドコネクタ。     the shield shell has a protruding portion that protrudes laterally from the connection portion to increase the first cross-sectional area,
    the housing has a slit through which the protrusion is inserted,
    The ground piece is electrically connected to the protrusion inserted into the slit.
    2. The shielded connector according to claim 1.
  3. 　前記シールドシェルは、前記シールド端子が収容されて電気的に接続されるとともに前記アース片と電気的に接続される筒状の本体部と、前記配線基板側に設置されるベース部と、を有し、
    　前記本体部は、前記第１断面積を有する前記接続部と、前記接続部よりも前記ベース部側において前記第１断面積よりも減少された前記第２断面積を有するくびれ部を有する、
    請求項１に記載のシールドコネクタ。     the shield shell has a cylindrical main body portion in which the shield terminal is housed and electrically connected and which is also electrically connected to the ground piece, and a base portion that is installed on the wiring board side,
    the main body portion has the connection portion having the first cross-sectional area, and a constricted portion having the second cross-sectional area that is smaller than the first cross-sectional area on the base portion side than the connection portion,
    2. The shielded connector according to claim 1.
  4. 　前記ハウジングは、前記スリットに隣接して前記アース片が挿入される枠部を有し、
    　前記アース片は、前記枠部に挿入されることで、前記スリットを挿通した前記突出部と接触して電気的に接続されている、
    請求項２に記載のシールドコネクタ。     the housing has a frame portion adjacent to the slit into which the ground piece is inserted,
    The earth piece is inserted into the frame portion, and is thereby in contact with and electrically connected to the protruding portion passing through the slit.
    3. The shielded connector according to claim 2.
PCT/JP2023/040946 2022-12-12 2023-11-14 Shielded connector WO2024127885A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022197867A JP2024083824A (en) 2022-12-12 Shielded Connectors
JP2022-197867 2022-12-12

Publications (1)

Publication Number Publication Date
WO2024127885A1 true WO2024127885A1 (en) 2024-06-20

Family

ID=91485544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/040946 WO2024127885A1 (en) 2022-12-12 2023-11-14 Shielded connector

Country Status (1)

Country Link
WO (1) WO2024127885A1 (en)

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