JP7722912B2 - Shielded Connector - Google Patents

Description

The present invention relates to a shielded connector for high-speed signal transmission equipped with a shield shell that blocks electromagnetic noise (hereinafter referred to as "noise").

One such shielded connector is described in Patent Document 1. The connector described in Patent Document 1 is attached to a circuit board and includes multiple connection terminals fixed to a base, 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 the first and second protrusions connected to the tip of the housing suppress noise radiation from the tip of the housing.

Japanese Patent Application Laid-Open No. 2017-188353

However, with the conventional connectors, the distance of the conductive path through which noise flows from the connection terminal to the tips of the first and second protrusions is longer than the distance of the conductive path through which noise flows from the connection terminal to the board, making it difficult to adequately suppress noise.

The present invention was made in consideration of the problems inherent in the prior art. 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 entering the housing, thereby improving shielding performance.

A shielded connector according to one aspect of the present invention comprises male and female connectors that mate with each other, one of the connectors comprising a housing that houses terminals connected to the ends of electric wires, the other of the connectors comprising a housing that mates with the first housing, a metal shield attached to the rear of the second housing so as to connect to the terminals of the first connector and fixed to the end of a wiring board, and a cylindrical metal shield shell that covers at least one of the second housing and the shield, the shield shell having an earth piece that is earthed to the wall of a housing that houses the wiring board, and the distance along the conductive path through which noise flows from the contact between the terminal of the first connector and the shield to the wall of the housing and the contact between the earth piece of the shield shell is set to be shorter than the distance along the conductive path through which noise flows from the contact between the terminal of the first connector and the shield to the contact point between the shield and the wiring board.

This invention provides a shielded connector that can sufficiently prevent noise generated around the terminals of the electric wire from entering the housing, thereby improving shielding performance.

1 is a perspective view showing a shield connector according to a first embodiment of the present invention; FIG. 2 is an exploded perspective view of the female connector of the shielded connector. FIG. 2 is an exploded perspective view of the male connector of the shielded connector. 4 is a cross-sectional view of the shield connector mounted on a wiring board. FIG. FIG. 10 is a perspective view showing a shielded connector according to a second embodiment of the present invention. FIG. 10 is a cross-sectional view of the shield connector of the second embodiment mounted on a wiring board. FIG. 10 is a cross-sectional view of a modified example of the shield connector of the second embodiment mounted on a wiring board. 10 is a cross-sectional view of the shield connector of the second embodiment mounted on a wiring board, as viewed from the front side. FIG. 10 is a perspective view of a rectangular pillar used when fixing a wiring board on which the shielded connector of the second embodiment is mounted to a bottom wall of a housing. FIG. FIG. 10 is a perspective view of a shield shell used in the shield connector of the second embodiment. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a modified example of a shield shell used in the shield connectors of the first and second embodiments. FIG. 10 is a perspective view showing a shielded connector according to a third embodiment of the present invention. FIG. 11 is a cross-sectional view of the shield connector of the third embodiment mounted on a wiring board. FIG. 11 is a perspective view of a shield shell used in the shield connector of the third embodiment. FIG. 11 is a perspective view of another modified example of the shield shell used in the shield connector of the third embodiment. FIG. 11 is a perspective view of another modified example of the shield shell used in the shield connector of the third embodiment. FIG. 10 is a perspective view showing a shielded connector according to a fourth embodiment of the present invention. FIG. 10 is an exploded perspective view of the shield connector of the fourth embodiment. FIG. 10 is a cross-sectional view of the shield connector of the fourth embodiment mounted on a wiring board. FIG. 11 is a perspective view showing a modified example of a shield shell used in the shield connector of the fourth embodiment. FIG. 11 is a perspective view showing a modified example of a shield shell used in the shield connector of the fourth embodiment. FIG. 11 is a perspective view showing a modified example of a shield shell used in the shield connector of the fourth embodiment. FIG. 11 is a perspective view showing a modified example of a shield shell used in the shield connector of the fourth embodiment. FIG. 10 is a cross-sectional view of a state in which a shield connector according to a fifth embodiment of the present invention is mounted on a wiring board. FIG. 13 is a perspective view of the female connector and the shield shell of the shield connector of the fifth embodiment before assembly. FIG. 13 is a perspective view showing a fitted state of the shield connector of the fifth embodiment. 10 is a cross-sectional view of a shield connector according to a sixth embodiment of the present invention mounted on a wiring board. FIG. FIG. 13 is a perspective view of the female connector and the shield shell of the shield connector of the sixth embodiment before assembly. FIG. 13 is a perspective view showing the mated state of the shield connector of the sixth embodiment. 13 is a cross-sectional view of a state in which a shield connector according to a seventh embodiment of the present invention is mounted on a wiring board. FIG. FIG. 20 is a perspective view of the female connector and the shield shell of the shield connector of the seventh embodiment before assembly. FIG. 23 is a perspective view showing the mated state of the shield connector of the seventh embodiment.

The following describes in detail the shielded connector according to an embodiment of the present invention using the drawings.

Figure 1 is a perspective view showing a shielded connector according to a first embodiment of the present invention. Figure 2 is an exploded perspective view of the female connector of the shielded connector. Figure 3 is an exploded perspective view of the male connector of the shielded connector. Figure 4 is a cross-sectional view of the shielded connector mounted on a wiring board.

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 (one connector) 10 and a male connector (the other connector) 20 that mates with the female connector 10. As shown in Figure 4, the female connector 10 is connected to the terminal 17a of a shielded electric wire 17, which is an STP (Shielded Twisted Pair) electric wire. The male connector 20 is also fixed to the end 41 of a wiring board 40 housed within the housing 2. The shielded connector 1, wiring board 40, housing 2, and communication equipment (not shown) housed within the housing 2 constitute communication system equipment A.

As shown in Figure 2, the female connector 10 includes an outer housing (one of the housings) 11, a shield terminal (outer terminal) 12, an inner housing 13, a female inner terminal 14, an alignment part 15, and inner and outer sleeves 16A and 16B.

As shown in Figures 1 and 2, the outer housing 11 is made of synthetic resin and has a box-like shape, and has a terminal accommodating portion 11a that accommodates a shield terminal (terminal) 12 serving as an outer terminal. Furthermore, a locking arm 11c is provided on the top surface 11b of the outer housing 11 to maintain the mated state when mated with the male connector 20. This locking arm 11c is provided with a convex engaging portion 11d.

As shown in FIG. 2, the shield terminal 12, which is an outer terminal, is formed by sheet metal processing using sheet metal material. The shield terminal 12 has a cylindrical housing accommodating portion 12a as a shield connection portion that accommodates the inner housing 13 and the matching component 15. The shield terminal 12 also has a pair of braid crimping pieces 12b, 12b that crimp and connect the braid 19 exposed by removing a portion of the sheath 17B of the shielded electric wire 17, and a pair of sheath crimping pieces 12c, 12c that crimp and connect the sheath 17B of the shielded electric wire 17. As shown in FIG. 4, the braid crimping piece 12b of the shield terminal 12 crimps the metal inner sleeve 16A that is crimped to the outer periphery of the braid 19 exposed from the sheath 17B. Furthermore, the braid crimping piece 12b of the shield terminal 12 also crimps and connects the braid 19A folded back at the folded back portion 19a that covers the outer periphery of the inner sleeve 16A. In other words, the braid crimping piece 12b is crimped to the outer periphery of the inner sleeve 16A via the braid 19A folded back at the fold-back portion 19a. The braid 19A folded back at the fold-back portion 19a is sandwiched between the braid crimping piece 12b and the inner sleeve 16A and held by the metallic hexagonal cylindrical outer sleeve 16B, thereby electrically connecting the shield terminal 12 and the braid 19. Note that in the shield terminal 12 shown in Figure 2, the pair of braid crimping pieces 12b, 12b and the pair of sheath crimping pieces 12c, 12c are shown in a crimped shape. Furthermore, as shown in Figure 4, when the shield terminal 12 is accommodated in the terminal accommodating portion 11a of the outer housing 11, the locking arm 11e engages with the protrusion 12d of the shield terminal 12, maintaining the accommodation state.

As shown in Figures 2 and 4, the inner housing 13 is made of synthetic resin and has an elliptical cylindrical shape, with a pair of terminal accommodating chambers 13a, 13a on both sides 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 in place by locking means (not shown). Furthermore, the upper and lower surfaces 13b and 13c of the inner housing 13 each have an engagement groove (engagement recess) 13d formed in the center of the rear side, into which a pair of upper and lower engagement protrusions 15b, 15b of a resin matching part 15 (described below) are press-fit.

The female inner terminal 14 has a contact portion 14a at the front to which the male inner terminal 28 of the male connector 20 is connected, and a pair of core crimping pieces 14b, 14b at the rear to which the core 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 2, the pair of core crimping pieces 14b, 14b are shown in a crimped shape.

As shown in Figures 2 and 4, the matching component 15 is a dielectric for impedance adjustment. It is interposed between the inner housing 13 and the inner sleeve 16A to suppress impedance mismatch and improve the transmission performance of the female connector 20 of the shielded connector 1. This impedance-adjusting matching component 15 is formed in a cylindrical resin shape with a pair of insertion holes 15a, 15a through which the untwisted portions of the two internal wires 18, 18 crimped and connected to the inner terminal 14 are inserted. Furthermore, the matching component 15 has engaging protrusions (engagement portions) 15b protruding from the front of the upper and lower centers to be press-fitted into the upper and lower engaging grooves 13d, 13d of the inner housing 13. These engaging grooves 13d and engaging protrusions 15b form an engaging means for integrating the inner housing 13 and the matching component 15. Note that a conductive metallic member may be used instead of the dielectric matching component 15.

As shown in Figures 2 and 4, the inner sleeve 16A is made of metal and has a C-shaped plate shape before being crimped. It is attached to the outer periphery of the braid 19, which is exposed by removing a portion of the sheath 17B of the shielded wire 17. As shown in Figure 4, when the braid crimping piece 12b of the shielded terminal 12 is crimped to the folded-back braid 19A of the shielded wire 17, the braid 19A is positioned adjacent to the front edge of the sheath crimping piece 12c from the front side of the braid crimping piece 12b. In other words, the braid 19 is folded back at the folded-back portion 19a at the front end 16a of the cylindrically crimped inner sleeve 16A, and the braid 19A folded back at the folded-back portion 19a covers the outer periphery of the cylindrical inner sleeve 16A. Furthermore, the braid crimping piece 12b and sheath crimping piece 12c of the shielded terminal 12 are covered and held by the hexagonal outer sleeve 16B. Noise is generated at the point where the braid 19 of the shielded wire 17 is crimped by the braid crimping piece 12b of the shield terminal 12, and enters the housing 2 housing the wiring board 40 through the opening 4 provided in the side wall 3.

As shown in Figure 4, the shielded electric wire 17 comprises two twisted inner electric wires 18, 18, a metal braid 19 that covers the two inner electric wires 18, 18 via a shielding foil 17A, and a sheath 17B, which is a resin outer coating that covers the braid 19. As shown in Figures 1 and 2, each inner electric wire 18 has a metal core wire 18a and a resin insulating coating 18b that covers the core wire 18a. The two inner electric wires 18, 18 exposed at the terminal 17a of the shielded electric wire 17 are untwisted by the matching part 15, and a pair of core crimping pieces 14b, 14b of the female inner terminal 14 are crimped and connected to the core wires 18a exposed from each insulating coating 18b by crimping.

As shown in Figure 3, the male connector 20 comprises an outer housing (the other housing) 21, a metal shield body 23, an inner housing 27, male inner terminals 28, a cover body 29, and a metal rectangular cylindrical shield shell 30 that covers the shield body 23.

As shown in Figures 3 and 4, the outer housing 21 is made of synthetic resin and has a rectangular parallelepiped shape, with the front side forming a square cylindrical hood portion 22 into which the female outer housing 11 is housed and fitted. A locking portion 22a is formed on the inner ceiling surface of this hood portion 22. As shown in Figure 4, when the female connector 10 and the male connector 20 are mated, the locking portion 11d of the locking arm 11c of the female connector 10 and the locking portion 22a of the hood portion 22 of the male connector 20 are engaged, maintaining the mated state. In addition, an oval insertion hole 21a is formed on the lower rear side of the outer housing 21 to accommodate the mating terminal accommodating portion 25 of the shield body 23, which will be described later.

As shown in Figures 1, 3, and 4, the metal shield body 23 is an electromagnetic shield formed in a rectangular parallelepiped shape using a conductive shielding material. It has a housing accommodating section 24 extending from the front to the lower rear, which accommodates an inner housing 27. An elliptical cylindrical mating terminal accommodating section 25, which accommodates the shield terminal 12 of the female connector 10, protrudes from the center to the lower front of the shield body 23, communicating with the housing accommodating section 24. Furthermore, cylindrical grounding legs 26 protrude from the center to the four rear corners of the bottom surface of the shield body 23. When the male connector 20 is mounted on the wiring board 40, the grounding legs 26 of the shield body 23 are inserted into ground circuit holes 42, which serve as ground through-holes in the wiring board 40, and connected by soldering. The mating terminal accommodating section 25 may be molded integrally with the shield body 23 or separately.

As shown in Figures 3 and 4, the inner housing 27 is made of synthetic resin and has an elliptical cylindrical front and a rectangular rear, forming an overall L-shape. It has a pair of terminal accommodating chambers 27a, 27a on both sides into which female inner terminals 28 are inserted.

As shown in FIG. 3, the male inner terminal 28 is formed into an L-shape using a conductive rod-like member. The tip end 28a of the male inner terminal 28 is connected to the contact portion 14a of the female inner terminal 14, and the base end 28b is connected to the wiring board 40. In other words, when mounting the male connector 20 on the wiring board 40, the base end 28b of the male inner terminal 28 of the male connector 20 is inserted into the communication circuit hole 43, which serves as a communication through-hole in the wiring board 40, and connected by soldering. In this mounted state, as shown in FIG. 4, the rear opening of the housing accommodating portion 24 of the shield 23 is closed by the synthetic resin lid 29.

As shown in Figures 1, 3, and 4, the shield shell 30 is made of conductive plate material and is formed into a rectangular tube shape by upper and lower pieces 31, 32 and side pieces 33, 33. As shown in Figures 1 and 4, the upper and lower pieces 31, 32 and side pieces 33, 33 of the rectangular tube-shaped shield shell 30 are formed to a size that covers the center to a portion of the front side of the shield body 23. In other words, from the center to the front end of the outer peripheral surface 23a of the shield body 23, a stepped peripheral surface 23b is formed that is lower by the plate thickness of the rectangular tube-shaped shield shell 30, and the rectangular tube-shaped shield shell 30 is attached to this stepped peripheral surface 23b. When this shield shell 30 is in its exterior state, the outer peripheral surface 23a of the shield body 23 from the center to the rear end is flush with the upper and lower pieces 31, 32 and side pieces 33, 33 of the shield shell 30.

As shown in Figure 3, the upper piece 31 and lower piece 32 of the rectangular cylindrical shield shell 30 have grounding pieces 34 that are grounded to the inner wall surface (wall surface) 3b of the side wall 3 of the housing 2. Each grounding piece 34 is divided into multiple pieces (in this embodiment, divided into three by inserting slits) with the center and front side inclined toward the inner wall surface 3b of the side wall 3 of the housing 2, and is an elastic spring piece with a convex contact portion 34a at the tip. Each elastic grounding piece 34 presses and urges the convex contact portion 34a into contact with the inner wall surface 3b of the side wall 3 of the housing 2.

Furthermore, as shown in Figure 4, L1 and L2 are the distances of the conductive path along which noise flows from the contact T between the shield terminal 12 of the female connector 10 and the mating terminal accommodating portion 25 of the shield body 23 to the contact portion 34a of each grounding piece 34 of the shield shell 30 that contacts the inner wall surface 3b of the side wall 3. If the distance of the conductive path along which noise flows from the contact T between the shield terminal 12 and the mating terminal accommodating portion 25 to the contact portion between the leg portion 26 of the shield body 23 and the wiring board 40 is L3, then L1 and L2 are set to be shorter than L3 (L1 < L3, L2 < L3).

As shown in Figure 4, the wiring board 40 on which the male connector 20 is mounted is a printed wiring board with a multi-layer structure that transmits high-speed signals differentially. That is, the wiring board 40 is formed by stacking, for example, multiple copper ground circuit boards sandwiched between upper and lower resin resist layers and each insulating resin board (neither of which is shown).

Four ground circuit holes 42 serving as ground through-holes are formed on the end portion 41 side of the wiring board 40. A wiring pattern (not shown) for an electromagnetic shield circuit is formed at the lower end of each of the four ground circuit holes 42, extending to the other end of the wiring board 40. The legs 26 of the shield body 23 of the male connector 20 are inserted into the ground circuit holes 42 serving as ground through-holes and connected by soldering.

Furthermore, the wiring board 40 has two communication circuit holes 43 formed on the end 41 side as communication through-holes. A communication circuit wiring pattern (not shown) is formed on the lower end side of these two communication circuit holes 43 so as to extend to the other end side of the wiring board 40. This wiring pattern is used as differential wiring and is made by tracing copper foil. The base end 28b of the male inner terminal 28 of the male connector 20 is inserted into the communication circuit holes 43 as communication through-holes and connected by soldering.

The housing 2 is a box-shaped metal case with side walls 3 and a bottom wall 5. It houses the wiring board 40, the male connector 10 mounted on the wiring board 40, and other electronic devices for high-speed signal transmission (not shown). The side wall 3 of the housing 2 has a rectangular opening 4 that receives the rectangular cylindrical shield shell 30. The gap S between the inner edge surface 4a of the opening 4 and the rectangular cylindrical shield shell 30 is small (e.g., 1 mm to 5 mm). The signal communication circuit of the mated male and female connectors 10, 20 employs a differential transmission system. The communication circuit is connected via the twisted internal wires 18, the female inner terminals 14, the male inner terminals 28, and the wiring pattern on the wiring board 40. The shield circuit is connected via the braid 19, the shield terminal 12, the mating terminal accommodating section 25, the shield body 23, and the ground circuit board (not shown) of the wiring board 40. Furthermore, the wiring board 40 is attached to the side wall 3 of the housing 2 via an L-shaped bracket or the like (not shown).

As shown in FIG. 4, with the shielded connector 1 of the first embodiment, when the male connector 20 mounted on the wiring board 40 is assembled into the housing 2, the grounding pieces 34 formed on the upper and lower sections 31 and 32 of the shield shell 30 come into contact with the inner wall surface 3b of the side wall 3. Each of these grounding pieces 34 is formed as a plurality of separate pieces on the upper and lower sections 31 and 32, and is formed to be elastic and inclined toward the inner wall surface 3b of the side wall 3 of the housing 2. As a result, the convex contact portion 34a of each grounding piece 34 is pressed against the inner wall surface 3b of the side wall 3, ensuring reliable contact. In other words, reliable grounding due to the elastic force of the upper and lower grounding pieces 34 enables a stable and satisfactory grounding connection over time.

When the female connector 10 is mated with the male connector 20, the mating terminal accommodating portion 25 of the shield body 23 of the male connector 10 is inserted and fitted between the terminal accommodating portion 11a of the outer housing 11 of the female connector 20 and the housing accommodating portion 12a of the shield terminal 12. This mating brings the outer surface of the housing accommodating portion 12a of the shield terminal 12 into contact with the inner surface of the elliptical cylindrical mating terminal accommodating portion 25 at contact point T shown in Figure 4. Let L1 and L2 be the distances of the conductive path through which noise flows from this contact point T to the contact points 34a of the upper and lower grounding pieces 34, and L3 be the distance through which noise flows from contact point T to the contact point between the leg 26 of the shield body 23 and the wiring board 40. L1 and L2 are shorter than L3. By making L1 and L2 shorter than L3, the resistance values of the conductive path between L1 and L2 can be made smaller than the resistance value of the conductive path between L3. This effectively prevents noise generated from the crimped portion of the braid 19 of the shielded wire 17 from entering the housing 2, improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated by wired communications, enabling high-performance, high-speed communications.

Furthermore, as shown in Figure 4, the gap S between the rectangular cylindrical shielding shell 30 and the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2 is set to a small dimension (e.g., 1 mm to 5 mm), thereby suppressing the intrusion of noise into the housing 2.

Figure 5 is a perspective view showing a shielded connector according to a second embodiment of the present invention. Figure 6A is a cross-sectional view of the shielded connector mounted on a wiring board. Figure 6B is a cross-sectional view of a modified example of the shielded connector mounted on a wiring board. Figure 7 is a cross-sectional view of the shielded connector mounted on a wiring board, viewed from the front. Figure 8 is a perspective view of a rectangular pillar used to secure the wiring board to the bottom wall of a housing. Figure 9 is a perspective view of a shielded shell used in the shielded connector.

The shielded connector 1 of this second embodiment differs from the first embodiment in that the grounding piece 34 is provided only on the upper piece 31 of the shield shell 30, and the wiring board 40 is fixed to the bottom wall 5 of the housing 2 via a metal rectangular pillar 7. Since the other components are the same as those of the first embodiment, the same components are designated by the same reference numerals and detailed descriptions are omitted.

In the shielded connector 1 of this second embodiment, a grounding piece 34 is formed only on the upper piece 31 of the shielded shell 30. The wiring board 40 on which the shielded connector 1 is mounted is fixed to a metal rectangular post 7 via screws 8 (fastening members), and the rectangular post 7 is further fixed to the bottom wall 5 of the housing 2 via screws 9 (fastening members). As a result, even without a grounding piece 34 on the lower piece 32 of the shielded shell 30, the rectangular post 7 functions as a ground. As with the first embodiment, noise generated from the crimped portion of the braid 19 of the shielded wire 17 can be sufficiently prevented from entering the housing 2. This improves the shielding performance of the shielded connector 1, effectively suppressing noise generated by wired communication and enabling high-performance, high-speed communication. Furthermore, noise can be suppressed even when a grounding piece 34 cannot be provided on the lower piece 32 due to structural constraints of the housing 2 or the connector.

In addition, in a modified mounting method for the wiring board 40 shown in Figure 6B, the end face 41a of the end 41 of the wiring board 40 is attached in contact with the inner wall surface 3b of the side wall 3 of the housing 2 via an L-shaped bracket or the like (not shown). As a result, even without the grounding piece 34 on the lower piece 32 of the shield shell 30, the end face 41a of the end 41 functions as a ground, and similar to the first embodiment, noise generated from the crimped portion of the braid 19 of the shielded electric wire 17 can be sufficiently suppressed from entering the housing 2. Furthermore, noise can be suppressed without the addition of the grounding piece 34 or rectangular post 7. This improves the shielding performance of the shielded connector 1, effectively suppressing noise generated by wired communication and enabling high-performance, high-speed communication.

Figures 10A to 10G are perspective views showing modified examples of the shield shell 30 used in the shielded connector 1 of the first and second embodiments. Each modified example is described below.

The rectangular cylindrical shield shell 30 shown in Figure 10A is sized to cover the stepped peripheral surface 23b formed from the center to the front end of the outer peripheral surface 23a of the shield body 23. The lower piece 32 is provided with a spring-like earth piece 34 formed in multiple segments and having a convex contact portion 34a at its tip. As a result, the convex contact portion 34a of the earth piece 34 of the lower piece 32 of the shield shell 30, which is fitted onto the stepped peripheral surface 23b of the shield body 23, is pressed against and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2.

The rectangular cylindrical shield shell 30 shown in Figure 10B is sized to cover the entire outer housing 21 and to be flush with the outer peripheral surface 23a of the shield body 23 when fitted to the outer housing 21. The upper and lower pieces 31, 32 are each provided with a spring-like grounding piece 34, each of which is divided into multiple pieces and has a convex contact portion 34a at its tip. When this shield shell 30 is fitted to the outer housing 21, the rear end of the shield shell 30 abuts against the front surface of the shield body 23. The shield body 23 does not have a stepped peripheral surface 23b. As a result, the convex contact portions 34a of the upper and lower grounding pieces 34 of the shield shell 30 fitted to the outer housing 21 are pressed against and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2.

The rectangular cylindrical shield shell 30 shown in Figure 10C is sized to cover the entire outer housing 21 and to be flush with the outer peripheral surface 23a of the shield body 23 when fitted to the outer housing 21. The upper piece 31 is provided with multiple, spring-shaped grounding pieces 34 each having a convex contact portion 34a at its tip. When this shield shell 30 is fitted to the outer housing 21, the rear end of the shield shell 30 abuts against the front surface of the shield body 23. The shield body 23 does not have a stepped peripheral surface 23b. As a result, the convex contact portion 34a of the grounding piece 34 on the upper part of the shield shell 30 fitted to the outer housing 21 is pressed against and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2.

The rectangular cylindrical shield shell 30 shown in Figure 10D is sized to cover the entire outer housing 21 and to be flush with the outer peripheral surface 23a of the shield body 23 when fitted to the outer housing 21. The lower piece 32 is provided with multiple, spring-shaped grounding pieces 34 each having a convex contact portion 34a at its tip. When this shield shell 30 is fitted to the outer housing 21, the rear end of the shield shell 30 abuts against the front surface of the shield body 23. The shield body 23 does not have a stepped peripheral surface 23b. As a result, the convex contact portion 34a of the grounding piece 34 below the shield shell 30 fitted to the outer housing 21 is pressed against and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2.

10E shows a rectangular cylindrical shield shell 30, with the upper and both side pieces 33, 33 each sized to cover the outer peripheral surface 23a of the outer housing 21 and shield body 23, and the lower piece 32 sized to cover the outer housing 21. Specifically, the upper and both side pieces 33, 33 each have an extension piece 35 that covers the rear side of the shield body 23. Each extension piece 35 has multiple engaging protrusions 35a that engage with engaging recesses (not shown) formed on the upper surface of the shield body 23. Each of the upper and lower pieces 31, 32 is provided with multiple, spring-shaped grounding pieces 34 each having a protruding contact portion 34a at its tip. As a result, the protruding contact portions 34a of the upper and lower grounding pieces 34 of the shield shell 30, which are fitted to the outer housing 21 and shield body 23, are pressed against and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2. Furthermore, low-resistance contact is achieved by contacting the extended piece 35 under pressure. The shield body 23 may not have an engaging recess, and the extended piece 35 may not have an engaging protrusion 35a, but may instead abut against the outer surface 23a of the shield body 23. Furthermore, the shield body 23 may not have an engaging recess, and the engaging protrusion 35a may contact as a convex contact portion. In this case, stable contact resistance can be achieved by destroying the oxide (sulfide) film on the shell, etc., due to stress concentration.

The rectangular cylindrical shield shell 30 shown in FIG. 10F has an upper piece 31 sized to cover the outer peripheral surface 23a of the outer housing 21 and the shield body 23, and a lower piece 32 and both side pieces 33, 33 sized to cover the outer housing 21. Specifically, the upper piece 31 is formed with an extension piece 35 that covers the rear side of the shield body 23. This extension piece 35 is formed with multiple engaging protrusions 35a that engage with engaging recesses (not shown) formed on the upper surface of the shield body 23. Each of the upper and lower pieces 31, 32 is provided with multiple, spring-shaped grounding pieces 34 that are divided into several pieces and have convex contact portions 34a at their tips. As a result, the convex contact portions 34a of the upper and lower grounding pieces 34 of the shield shell 30, which are attached to the upper surfaces of the outer housing 21 and the shield body 23, are pressed and urged into contact with the inner wall surface 3b of the side wall 3 of the housing 2. Furthermore, the urged contact by the extension piece 35 ensures low-resistance contact. The shield body 23 may not have an engaging recess, and the extension piece 35 may not have an engaging protrusion 35a, but may abut against the outer surface 23a of the shield body 23. Furthermore, the shield body 23 may not have an engaging recess, and the engaging protrusion 35a may contact as a convex contact portion. In this case, stable contact resistance can be obtained by breaking down the oxide (sulfide) film on the shell, etc., due to stress concentration.

10G shows a rectangular cylindrical shield shell 30. Both side pieces 33, 33 are sized to cover the outer peripheral surface 23a of the outer housing 21 and the shield body 23, and the upper and lower pieces 31, 32 are sized to cover the outer housing 21. That is, both side pieces 33, 33 are each formed with an extension piece 35 that covers the rear side of the shield body 23. Each extension piece 35 is formed with multiple engaging protrusions 35a that engage with engaging recesses (not shown) formed on the side of the shield body 23. Each upper and lower piece 31, 32 is further provided with multiple, split, spring-shaped ground pieces 34 each with a protruding contact portion 34a at its tip. This causes the protruding contact portions 34a of the upper and lower ground pieces 34 of the shield shell 30, which are fitted onto the side surfaces of the outer housing 21 and the shield body 23, to be pressed into contact with the inner wall surface 3b of the side wall 3 of the housing 2. Furthermore, low-resistance contact is achieved by contacting the extended piece 35 under pressure. The shield body 23 may not have an engaging recess, and the extended piece 35 may not have an engaging protrusion 35a, but may instead abut against the outer surface 23a of the shield body 23. Furthermore, the shield body 23 may not have an engaging recess, and the engaging protrusion 35a may contact as a convex contact portion. In this case, stable contact resistance can be achieved by destroying the oxide (sulfide) film on the shell, etc., due to stress concentration.

Figure 11 is a perspective view showing a shielded connector according to a third embodiment of the present invention. Figure 12 is a cross-sectional view of the shielded connector mounted on a wiring board. Figure 13A is a perspective view of a shielded shell used in the shielded connector. Figure 13B is a perspective view of another modified example of the shielded shell. Figure 13C is a perspective view of another modified example of the shielded shell.

The shielded connector 1 of this third embodiment differs from that of the first embodiment in that a notch 23c is formed from the center to the front of the top surface of the shield body 23, and each of the pieces 31, 32, and 33 of the rectangular cylindrical shield shell 30 is sized to cover the notch 23c. This notch 23c is formed from the center to the front of the shield body 23 so that the wall thickness from the top surface of the shield body 23 to the inner surface of the housing accommodating portion 24 is the same as the wall thickness from the bottom surface of the shield body 23 to the inner surface of the housing accommodating portion 24. Since the rest of the configuration is the same as in the first embodiment, the same components are designated by the same reference numerals and detailed description will be omitted.

In the shielded connector 1 of the third embodiment, the upper and lower pieces 31, 32 of the rectangular cylindrical shield shell 30 have grounding pieces 34 and are sized to cover the cutouts 23c of the shield body 23, thereby achieving the same functions and effects as the first embodiment. That is, as shown in FIG. 12 , the distances L1 and L2 of the conductive path along which noise flows from the contact point T between the shield terminal 12 and the shield body 23 to the contact points 34a where the upper and lower grounding pieces 34 contact the side walls 3 can be made the same. Furthermore, these distances L1 and L2 are shorter than the distance L3 of the conductive path along which noise flows from the contact point T between the shield terminal 12 and the shield body 23 to the contact points between the leg portions 26 of the shield body 23 and the wiring board 40. This more effectively suppresses noise generated from the crimped portions of the braid 19 of the shielded electric wire 17 from penetrating into the housing 2, improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated during wired communication, enabling high-performance, high-speed communication.

In addition, in the shield shell 30 of the third embodiment shown in Figure 13A, the upper and lower arm portions 31 and 32 each have an earthing piece 34, but as shown in Figure 13B, the upper arm portion 31 may have an earthing piece 34 only. In addition, as shown in Figure 13B, the lower arm portion 32 may have an earthing piece 34 only.

Figure 14 is a perspective view showing a shielded connector according to a fourth embodiment of the present invention. Figure 15 is an exploded perspective view of the shielded connector. Figure 16 is a cross-sectional view of the shielded connector mounted on a wiring board.

The shielded connector of this fourth embodiment differs from that of the first embodiment in that the mating terminal accommodating portion 25 of the shield body 23 has a guide protrusion 25a, the outer housing 21 has an engagement groove 21b, and the grounding piece 37 is notched in an arc shape. Since the other components are the same as those of the first embodiment, the same components are designated by the same reference numerals and detailed descriptions are omitted.

As shown in Figures 14 to 16, guide protrusions 25a are formed on both sides of the mating terminal accommodating portion 25 of the shield body 23 of the male connector 20, extending in the front-to-rear direction. Furthermore, engagement elongated grooves 21b, into which the guide protrusions 25a are inserted, are formed from the center to the rear of both side walls of the outer housing 21 of the male connector 20, extending in the front-to-rear direction to correspond to the guide protrusions 25a.

As shown in Figures 14 and 16, the upper and lower pieces 31, 32 and the side pieces 33, 33 of the rectangular cylindrical shield shell 30 are sized to cover the entire outer housing 21 of the male housing 20, and the shield shell 30 and the shield body 23 are flush with each other in their exterior packaging. Grounding pieces 36 are formed on the upper and lower pieces 31, 32 of the rectangular cylindrical shield shell 30. Each grounding piece 36 has a free end 36a and is notched in an arc shape that is elastic and curves outward. This notch is indicated by reference numeral 36b in the figures, and the contact portion is indicated by reference numeral 36c. As shown in Figure 16, the contact portion 36c of the elastic arc-shaped grounding piece 36 is pressed against and urged into contact with the inner edge surface 4a of the rectangular opening 4 formed in the side wall 3 of the housing 2.

The following describes the operation and effects of the shielded connector 1 of the fourth embodiment configured as described above.

As shown in Figure 16, L1 and L2 are the distances of the conductive path along which noise flows from the tip of the guide protrusion 25a to the contact points 36c of the upper and lower arc-shaped grounding pieces 36 of the shield shell 30 and the contact point T on the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2. Furthermore, if L3 is the distance along which noise flows from the tip of the guide protrusion 25a to the contact point between the leg 26 formed on the shield body 23 and the wiring board 40, distances L1 and L2 are shorter than distance L3. This more effectively suppresses noise generated from the crimped portion of the braid 19 of the shielded electric wire 17 from entering the housing 2, improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated by wired communication, enabling high-performance, high-speed communication. Even when the tolerances of the vertical dimensions of the opening 4 and the wiring board 40 are cumulative, these tolerances are absorbed, ensuring stable grounding reliability.

Figures 17A to 17D are perspective views showing modified examples of the shield shell 30 used in the shielded connector 1 of the fourth embodiment. Each modified example is described below.

The rectangular cylindrical shield shell 30 shown in Figure 17A is sized to cover the entire outer housing 21 of the male housing 20 and to be flush with the shield body 23 in the exterior state. An arc-shaped grounding piece 36 having a free end 36a and curved outward elastically is cut out only in the upper piece 31 of the rectangular cylindrical shield shell 30. This allows the contact portion 36c of the arc-shaped grounding piece 36 on the upper piece 31 of the shield shell 30, which is fitted to the outer housing 21, to be pressed against and come into contact with the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2. The grounding piece 36 of this modified example may also be formed only in the lower piece 32.

The rectangular cylindrical shield shell 30 shown in Figure 17B has an upper piece 31 and both side pieces 33, 33 each sized to cover the outer housing 21 and shield body 23, and a lower piece 32 sized to cover the outer housing 21. That is, the upper piece 31 and both side pieces 33, 33 each have an extension piece 35 that covers the rear side of the shield body 23. Each extension piece 35 has multiple engaging protrusions 35a that engage with engaging recesses (not shown) formed on the upper surface of the shield body 23. Furthermore, the upper and lower pieces 31, 32 of the rectangular cylindrical shield shell 30 each have a notched, arc-shaped earthing piece 36 that has a free end 36a and is elastically curved outward. As a result, the contact portions 36c of the arc-shaped earthing pieces 36 on the upper and lower pieces 31, 32 of the shield shell 30 fitted to the outer housing 21 and shield body 23 are pressed into contact with the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2.

17C shows a rectangular cylindrical shield shell 30 in which the upper piece 31 and both side pieces 33, 33 are sized to cover the outer housing 21 and shield body 23, and the lower piece 32 is sized to cover the outer housing 21. Specifically, the upper piece 31 and both side pieces 33, 33 each have an extension piece 35 that covers the rear side of the shield body 23. Each extension piece 35 has multiple engaging protrusions that engage with engaging recesses (not shown) formed on the upper surface of the shield body 23. Only the upper piece 31 of the rectangular cylindrical shield shell 30 has a notched, arc-shaped ground piece 36 that has a free end 36a and is elastically curved outward. As a result, the contact portion 36c of the arc-shaped ground piece 36 of the upper piece 31 of the shield shell 30, which is fitted over the outer housing 21 and shield body 23, is pressed into contact with the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2. In addition, the grounding piece 36 of this modified example may be formed only on the lower piece 32.

The rectangular cylindrical shield shell 30 shown in Figure 17D is sized to cover the entire outer housing 21 of the male housing 20 and to be flush with the shield body 23 in the exterior state. The upper and lower arm portions 31, 32 of the rectangular cylindrical shield shell 30 have notches formed to form arch-spring-shaped grounding pieces 37, which are connected at both ends and curve outward. This allows the contact portions 37c of the arc-shaped arch-spring-shaped grounding pieces 37 on the upper and lower arm portions 31, 32 of the shield shell 30 fitted to the outer housing 21 to be pressed against and come into contact with the inner edge surface 4a of the opening 4 in the side wall 3 of the housing 2. The free ends of the grounding pieces 37 function as antennas, preventing noise from being emitted into the housing 2. The grounding pieces 37 of this modified example may be formed on only one of the upper arm portion 31 or the lower arm portion 32.

Figure 18 is a cross-sectional view of the fifth embodiment of the shielded connector of the present invention mounted on a wiring board. Figure 19 is a perspective view of the female connector and shield shell of the shielded connector before assembly. Figure 20 is a perspective view showing the mated state of the shielded connector.

The shielded connector 1 of this fifth embodiment differs from that of the first embodiment in that the rectangular cylindrical shield shell 30 has flange-shaped grounding pieces 38 formed by bending them vertically at the tips of the upper and lower pieces 31, 32. The remaining configuration is the same as that of the first embodiment, so the same components are designated by the same reference numerals and detailed descriptions are omitted.

As shown in Figure 18, the upper and lower pieces 31, 32 and both side pieces 33, 33 of the rectangular tubular shield shell 30 are formed to a size that covers the entire outer housing 21 and is flush with the shield body 23 in the exterior state. As shown in Figures 18 to 20, the tips of the upper and lower pieces 31, 32 of the rectangular tubular shield shell 30 are each bent in the vertical direction to form a mounting flange (flange-like). The lower piece 31 of the rectangular tubular shield shell 30 contacts the inner edge surface 4a of the opening 4 in the side wall 3 via the indent 6. The ground piece 38 of this embodiment may be formed on only one of the upper piece 31 or the lower piece 32.

In the shielded connector 1 of this fifth embodiment, the entire surfaces of the flange-shaped grounding pieces 38 on the upper and lower pieces 31, 32 of the shield shell 30 contact the outer wall surface 3a surrounding the opening 4 in the side wall 3 of the housing 2, thereby achieving the same effects and advantages as the first embodiment. In other words, the intrusion of noise generated from the crimped portion of the braid 19 of the shielded electric wire 17 into the housing 2 can be more sufficiently suppressed, improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated by wired communication, enabling high-performance, high-speed communication.

Figure 21 is a cross-sectional view of a shielded connector according to a sixth embodiment of the present invention mounted on a wiring board. Figure 22 is a perspective view of the female connector and shield shell of the shielded connector before assembly. Figure 23 is a perspective view showing the mated state of the shielded connector.

The shielded connector 1 of this sixth embodiment differs from that of the fifth embodiment in that the flange-shaped grounding piece 38 on the upper piece 31 of the rectangular cylindrical shielding shell 30 does not have a mounting hole, and the flange-shaped grounding piece 39 on the lower piece 32 has a mounting hole 39a. The remaining configuration is the same as in the fifth embodiment, so the same components are designated by the same reference numerals and detailed description will be omitted.

As shown in Figure 21, the upper and lower pieces 31, 32 and the side pieces 33, 33 of the rectangular cylindrical shield shell 30 are sized to cover the entire outer housing 21 and to be flush with the shield body 23 in the exterior state. As shown in Figures 21 to 23, the tips of the upper and lower pieces 31, 32 of the rectangular cylindrical shield shell 30 are bent in the vertical direction to form mounting flanges (flanges). The flange-shaped grounding piece 39 of the upper piece 31 has a mounting hole 39a through which a screw (fastening member) 50 is inserted, and is fixed to the screw hole 3c in the side wall 3 of the housing 2 by the screw 50. The flange-shaped grounding piece 38 of the lower piece 32 does not have a mounting hole 39a, and its entire surface contacts the outer wall surface 3a around the opening 4 in the side wall 3 of the housing 2. The lower piece 31 of the rectangular cylindrical shield shell 30 contacts the inner edge surface 4a of the opening 4 in the side wall 3 via the indent 6.

In the shielded connector 1 of this sixth embodiment, the upper flange-shaped grounding piece 39 of the shield shell 30 is fixed to the side wall 3 of the housing 2 with screws 50, and the entire surface of the lower flange-shaped grounding piece 38 contacts the outer wall surface 3a surrounding the opening 4 of the side wall 3 of the housing 2. This achieves the same effects and advantages as the fifth embodiment. This means that noise generated from the crimped portion of the braid 19 of the shielded electric wire 17 can be more effectively prevented from entering the housing 2, improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated by wired communications, enabling high-performance, high-speed communications. Furthermore, noise suppression is also achieved while avoiding the difficulties of bolting the grounding piece 38 of the lower piece 32 to the shielded electric wire 17.

Figure 24 is a cross-sectional view of the seventh embodiment of the shielded connector of the present invention mounted on a wiring board. Figure 25 is a perspective view of the female connector and shield shell of the shielded connector before assembly. Figure 26 is a perspective view showing the mated state of the shielded connector.

The shielded connector 1 of this seventh embodiment differs from that of the sixth embodiment in that the flange-shaped grounding pieces 39 on the upper and lower sections 31, 32 of the rectangular cylindrical shield shell 30 each have a mounting hole 39a. Since the other components are the same as those of the sixth embodiment, the same components are designated by the same reference numerals and detailed descriptions are omitted.

As shown in FIG. 24, the upper and lower pieces 31, 32 and the side pieces 33, 33 of the rectangular cylindrical shield shell 30 are sized to cover the entire outer housing 21 and to be flush with the shield body 23 in the exterior configuration. As shown in FIGS. 24 to 26, the ends of the upper and lower pieces 31, 32 of the rectangular cylindrical shield shell 30 are each bent upward and downward to form a mounting flange (flange-like). Each flange-shaped grounding piece 39 of the upper and lower pieces 31, 32 has a mounting hole 39a through which a screw (fastening member) 50 is inserted, and the flange-shaped grounding piece 39 is fastened to a screw hole 3c in the side wall 3 of the housing 2 by the screw 50. The lower piece 31 of the rectangular cylindrical shield shell 30 contacts the inner edge surface 4a of the opening 4 in the side wall 3 via the indent 6. Alternatively, the grounding piece 39 of this embodiment may be formed on only one of the upper piece 31 or the lower piece 32.

In the shielded connector 1 of this seventh embodiment, the flange-shaped grounding pieces 39 on the upper and lower pieces 31, 32 of the shielded shell 30 are fixed to the side wall 3 of the housing 2 with screws 50, respectively. This provides the same effects and advantages as the sixth embodiment. In other words, it is possible to more effectively prevent noise generated from the crimped portion of the braid 19 of the shielded electric wire 17 from entering the housing 2, thereby improving the shielding performance of the shielded connector 1. This effectively suppresses noise generated by wired communication, enabling high-performance, high-speed communication.

The present embodiment has been described above, but it is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

That is, the grounding pieces 36, 37, 38, and 39 of the fourth to seventh embodiments may be combined with the first to third embodiments. Furthermore, the extension piece 35 may also be combined with the fourth to seventh embodiments.

Furthermore, the fourth embodiment may be configured without the guide protrusion 25a and long engagement groove 21b. Furthermore, the guide protrusion 25a and long engagement groove 21b may be combined with other embodiments besides the fourth embodiment.

Furthermore, in the modified examples of the first and second embodiments shown in Figures 10B to 10G, the fourth embodiment, the fifth embodiment, the sixth embodiment, and the seventh embodiment, it is also possible to ensure that L1, L2 do not exceed L3.

Furthermore, in the above embodiment, the shield shell is attached to the male connector side, but the shield shell may also be attached to the female connector side.

Furthermore, according to the first and second embodiments, the earthing pieces formed by bending the upper and lower sections of the shield shell are divided into three sections via two slits, but they may also be divided into two sections via one slit, or into four sections via three slits.

Furthermore, in the second embodiment, the wiring board is attached to the bottom plate of the housing via a rectangular pillar, or the end face of the wiring board is attached by abutting the inner wall surface of the side wall of the housing, but these structures may also be applied to the first embodiment and the third to seventh embodiments. The rectangular pillar may also be provided integrally with the housing.

1 Shielded connector 2 Housing 3 Side wall 3a Outer wall surface (wall surface)
3b Inner wall surface (wall surface)
4 Rectangular opening 4a Inner edge surface 5 Bottom wall 7 Square pillar 10 Female connector (one connector)
11 outer housing (one housing)
12 Shield terminal as outer terminal 12a Cylindrical housing receiving portion 17 Shielded electric wire 17a Terminal 19 Braid 20 Male connector 21 Outer housing (other housing)
21b Engagement long groove 23 Shield body 23a Outer circumferential surface 23c Notch portion 25 Mating terminal accommodating portion 25a Guide protrusion 26 Leg portion 30 Square cylindrical shield shell (cylindrical shield shell)
31 Upper piece portion 32 Lower piece portion 33, 33 Side piece portions 34 Inclined earth piece 34a Contact portion 35 Extension piece 35a Engagement protrusion 36 Arc-shaped earth piece 36a Free end 36b Notch 36c Contact portion 37 Arch spring-shaped earth piece 47b Notch 37c Contact portion 38, 39 Flange-shaped earth piece 39a Mounting hole 50 Screw (fastening member)
T: Contact point between the terminal of one connector and the shielding body S: Gap between the rectangular cylindrical shielding shell and the opening in the side wall L1, L2: Distance of the conductive path along which noise flows from the contact point between the terminal of one connector and the shielding body to the contact point between the wall of the housing and the earth piece of the shielding shell L3: Distance of the conductive path along which noise flows from the contact point between the terminal of one connector and the shielding body to the contact point between the shielding body and the wiring board

Claims (20)

The connector includes male and female connectors that mate with each other,
One of the male and female connectors includes a housing that houses a shield terminal connected to an end of a shielded electric wire,
the shielded wire of the one connector has an inner wire and a braid covering the inner wire,
the shield terminal of the one connector is an outer terminal crimped and connected to the braid of the shielded electric wire,
The other connector of the male and female connectors comprises a second housing that is fitted into the first housing, a metal shield body that is assembled to the rear of the second housing so as to connect to a shield terminal of the first connector and is fixed to an end of a wiring board, and a metal cylindrical shield shell that covers at least one of the second housing and the shield body,
the shield shell has a ground piece that is grounded to a wall surface of a housing that accommodates the wiring board,
The tip end of the shield terminal is accommodated in and connected to a mating terminal accommodating portion provided at the tip end of the shield body,
guide protrusions are formed on both sides of the mating terminal accommodating portion of the shield body so as to extend in the front-rear direction,
The other housing has two side walls formed at their rear ends from the center thereof to the rear thereof, each having an engagement groove into which the guide protrusion is inserted.
A shielded connector in which the distance of the conductive path through which noise flows from the contact point between the shield terminal of one of the connectors and the shield body to the contact point between the wall surface of the housing and the earth piece of the shield shell is set to be shorter than the distance of the conductive path through which noise flows from the contact point between the shield terminal of one of the connectors and the shield body to the contact point between the shield body and the wiring board. The shielded connector according to claim 1, wherein the shield shell is formed into a rectangular tube shape with upper and lower pieces and side pieces, and the grounding piece is formed on at least one of the upper and lower pieces. a rectangular opening for receiving the rectangular cylindrical shield shell is formed in a side wall of the housing;
3. The shielded connector according to claim 2, wherein a gap between said rectangular cylindrical shield shell and said opening is set to a small dimension. The earth piece formed on at least one of the upper and lower pieces of the rectangular cylindrical shield shell is divided into a plurality of pieces inclined toward the wall surface of the side wall of the housing, and has a convex contact portion at each tip and is elastic,
3. The shielded connector according to claim 2, wherein the convex contact portions of the resilient grounding pieces are pressed against and biased into contact with the sidewalls of the housing. The shielded connector of claim 2, wherein the upper and lower pieces and both side pieces of the rectangular cylindrical shield shell are formed to a size that covers a portion of the center and front of the shield body. The shielded connector of claim 2, wherein the upper and lower pieces and both side pieces of the rectangular cylindrical shielded shell are formed to a size that covers the entire other housing. 7. The shielded connector according to claim 6, wherein an extension piece that covers the outer peripheral surface of the shield body is formed on at least one of the upper piece and both side pieces of the rectangular cylindrical shield shell, which is formed to a size that covers the entire other housing. 8. The shielded connector according to claim 7, wherein the extension piece formed on at least one of the upper piece and both side pieces of the rectangular cylindrical shielded shell has an engaging protrusion formed thereon that engages with an engaging recess formed in the shield body. The shielded connector of claim 2, wherein the upper and lower pieces and both side pieces of the rectangular cylindrical shield shell are formed to a size that covers a notch formed from the center of the shield body to the front. The upper and lower pieces of the rectangular cylindrical shield shell each have an earth piece,
10. The shielded connector according to claim 9, wherein the distance of the conductive path through which noise flows from the contact point between the shield terminal of said one connector and the shield body to the contact point between the wall surface of said housing and the earth piece on the upper part of said shield shell is set to be the same as the distance of the conductive path through which noise flows from the contact point between the shield terminal of said one connector and the shield body to the contact point between the wall surface of said housing and the earth piece on the lower part of said shield shell. The upper and lower pieces and both side pieces of the rectangular cylindrical shield shell are formed to a size that covers the entire other housing,
The earthing piece formed on at least one of the upper and lower pieces of the rectangular cylindrical shield shell has a free end and is notched in an arc shape that is elastically curved outward,
3. The shielded connector according to claim 2, wherein the contact portion of the elastic, arc-shaped earth piece is pressed against and biased to come into contact with an inner edge surface of a rectangular opening formed in a side wall of the housing. 12. The shielded connector according to claim 11 , wherein an extension piece for covering the shield body is formed on each of the upper piece and both side pieces of the rectangular cylindrical shield shell. The upper and lower pieces and both side pieces of the rectangular cylindrical shield shell are formed to a size that covers the entire other housing,
The earth piece formed on at least one of the upper and lower pieces of the rectangular cylindrical shield shell is cut out to have an arch spring shape with both ends connected and curved outward,
3. The shielded connector according to claim 2, wherein the contact portion of the arch spring-shaped grounding piece is pressed against and biased to contact an inner edge surface of a rectangular opening formed in a side wall of the housing. 2. The shielded connector according to claim 1, wherein the distance of the conductive path through which noise flows from the tip of the guide protrusion to the contact portion of the arc-shaped earth piece of the shield shell and the contact on the inner edge surface of the opening in the side wall of the housing is set to be shorter than the distance of the conductive path through which noise flows from the tip of the guide protrusion to the contact portion between the leg formed on the shield body and the wiring board . The upper and lower pieces and both side pieces of the rectangular cylindrical shield shell are formed to a size that covers the entire other housing,
3. The shielded connector according to claim 2, wherein the earthing piece formed on at least one of the upper and lower pieces of the rectangular cylindrical shielding shell is bent into a flange shape that contacts the outer wall surface surrounding a rectangular opening formed in the side wall of the housing. The flange-shaped grounding piece has a mounting hole through which a fastening member is inserted,
16. The shielded connector according to claim 15 , wherein the flange-shaped grounding piece is fixed to the side wall of the housing by the fastening member. The upper and lower pieces of the rectangular cylindrical shield shell each have a flange-shaped earth piece at the tip,
17. The shielded connector according to claim 16 , wherein at least one of the upper and lower flange-shaped grounding pieces has the mounting hole. The upper and lower pieces of the rectangular cylindrical shield shell each have a flange-shaped earth piece at the tip,
17. The shielded connector according to claim 16 , wherein the upper and lower flange-shaped grounding pieces each have the mounting hole. The shielded connector according to claim 1, wherein the wiring board housed in the housing is attached to the bottom wall of the housing via a metal rectangular pillar. The shielded connector according to claim 1, wherein the wiring board housed in the housing is attached with the end face of the end portion in contact with the inner wall surface of the side wall of the housing.