JPH0222987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shielded electrical connector for connecting transmission cables.

In a transmission cable, the conductors of a plurality of signal conductors are separated from each other by intermediate ground conductors arranged to prevent signal interference. In such connectors for transmission cables, a signal conductor is connected to each signal contact of the connector and a ground conductor is jointly connected to a conductive shield of the connector, which shield is further grounded or, for example, welded or It is well known to use bolts to connect to the shield of a complementary electrical connector.

According to the present invention, the cavity has a cavity that holds the signal contact and the ground contact that are respectively connected to the plurality of signal conductors and the plurality of ground conductors of the transmission cable, and the cavity opens to the fitting surface. It consists of an insulating housing and a conductive shield housing the insulating housing inside, and the signal contact and the grounding contact in the cavity can engage with the signal terminal post and the grounding terminal post, respectively. In a shielded electrical connector for use with the invention, the shield is folded around the insulating housing by sheet metal material to form a front surface extending over the mating surface and an opening aligned with the cavity. A tongue extending from the shield is formed in a part of the opening corresponding to the cavity holding the grounding contact, and enters into the corresponding cavity, so that the tongue extends from the grounding terminal. A contact member for engaging with a pillar is formed, and when the signal contact and the grounding contact engage with the corresponding signal terminal pillar and grounding terminal pillar, the shield engages with the contact member. The shielded electrical connector is characterized in that it is grounded through engagement with the grounding terminal post.

Therefore, no bolting or welding is required to ground the shield conductor and the cable ground conductor or to secure it to another shield.

The shield of the present invention preferably has a plurality of tongues on the front surface, each tongue extending into a respective cavity and connecting the shield and the plurality of ground conductors to the ground of a complementary electrical connector. Acts to connect to the contact member.

The shield according to the present invention can be manufactured easily and economically by bending a single sheet metal material.

Next, embodiments of the present invention will be described with reference to the drawings.

The electrical connector shown in FIGS. 1 to 4 is for terminating a transmission cable 1 having signal conductors 2 alternating with ground conductors 3,
As shown more clearly in FIGS. 5 and 6, it is housed inside an electrically conductive shield 4 assembled from folded sheet metal material.

The electrical connector contains within the shield 4 an elongate composite insulating housing 5, 6, 7 consisting of an upper part 5, a middle part 6 and a lower part 7. The two rows of signal contacts 8 and ground contacts 9 have contact portions 10 and 10' of the contacts 8 and 9 protruding from the lower side of the intermediate portion 6, as shown in FIG. , conductor connection parts 11 and 12 are embedded in the intermediate part 6 so as to protrude from the upper side of the intermediate part 6. The signal contact 8 and the ground contact 9 are formed in a flat conductor frame arrangement, with alternating connecting portions 11 and 12 being bent in opposite directions relative to the frame surface, and connecting portion 11 being bent in opposite directions with respect to the frame surface. It is preferable that the connecting portion 12 is formed to terminate closer to the intermediate trunk portion 6 than the connecting portion 12 that gathers at the band portion 13 of the conductor frame.

The ground conductor 3 is suitably connected to the connection part 12 by welding, and the signal conductor 2 is preferably connected to the connection part 11 in a similar manner. The upper body section 5 is preferably formed by snap-fitting two parts together, including a cavity 14 containing the connecting parts 11, 12, and a cavity 14 for pulling the transmission cable 1 out of the electrical connector and securing the transmission cable 1 in place. A passageway 15 is defined.

The intermediate body section 6 abuts a lower body section 7 with two rows of cavities 16, each cavity 16 having a narrow lower inlet 17 and each receiving a signal terminal through the inlet 17. The contact portion 10 is adapted to engage with the post 18 and the grounding terminal post 18', respectively.
10', the terminal posts 18, 18' extending from a printed circuit board or complementary electrical connector 19.

As shown in FIGS. 5 and 6, the shield 4 is formed by bending a sheet metal material. The material is shaped so that it can be folded to define a box adapted to accommodate the insulating housing. The material has a front or central portion 2 adapted to align with the lower or mating surface 30 of the connector as shown in FIG.
Contains 0. The central portion 20 is the entrance 17 of the cavity 16
It has two rows of openings 21 arranged in alignment with the openings 21. Each opening 21 is sized to accommodate the signal terminal post 18 and the ground terminal post 18' without coming into contact with the shield 4. The shielding material includes resilient tongues 22 at some of the openings 21, the resilient tongues 22 spanning the openings 21, and the material being folded to form a box, as shown in FIG. is pushed inside the box when forming the box.

The material has complementary tongues 23 and slots 24.
The tongue 23 is adapted to engage the slot 24 to secure the box closed about the connector.

After forming the shield as described above and terminating the transmission cable 1 to the electrical connector, the electrical connector is inserted into the shield 4. Then, the center part 2
0 abut the mating surface 30 of the connector and the inlets 17 align with respective openings 21 in the central portion 20 . A tongue 22 adapted to act as a contact spring extends into the respective cavity 16 to form a contact member so as to face oppositely the contact portions 10, 10' within the cavity 16. The grounding terminal post 18' is connected to the cavity 16.
In the cavity 16 provided with the tongue 22, the contact member 10' of the tongue 22 as well as the contact portion 10' elastically engage with the grounding terminal post 18'.

A grounding terminal post 1 arranged to enter a cavity 16 that includes both a contact portion 10′ and a tongue portion 22.
8' is grounded. When such a grounding terminal post 18' is inserted into the cavity 16, both the shield 4 and the band portion 13 are grounded through the grounding terminal post 18'. In the shielded electrical connector of the present invention, since the plurality of tongues 22 corresponding to the plurality of grounding contacts 9 are provided, the path for noise entering from the outside to reach the tongues 22 is short, and the noise can be immediately removed from the grounding terminal post 18. Since the signal terminal is grounded through the terminal 1, the noise protection for the signal terminal can be reduced.

[Brief explanation of drawings]

1 is a side view of a shielded electrical connector terminally connected to a transmission cable; FIG. 2 is a bottom view of the electrical connector of FIG. 1; FIG. 3 is an end view of the electrical connector of FIG. 1; A sectional view taken along line 4-4 in Figure 1, and an enlarged view showing the electrical connector when connected to a terminal post on a printed circuit board. Figure 5 is an enlarged partial development of the shield of the electrical connector in Figure 1. Figure 6 is an end view of the shield of Figure 5 partially assembled prior to attachment to an electrical connector. 1...Transmission cable, 2...Signal conductor, 3...
Ground conductor, 4... Conductive shield, 5, 6, 7...
Insulating housing, 8... Signal contact, 9... Grounding contact, 16... Cavity, 18... Signal terminal post, 18'... Grounding terminal post, 20... Front, 2
1... Opening, 22... Tongue, 30... Fitting surface.

Claims (1)

[Scope of Claims] 1. It has a cavity for holding a signal contact and a grounding contact that are respectively connected to the plurality of signal conductors and the plurality of grounding conductors of the transmission cable, and the cavity is open to the fitting surface. and a conductive shield housing the insulating housing therein, the signal contact and the ground contact in the cavity engage with the signal terminal post and the ground terminal post, respectively. In a shielded electrical connector that can be mated,
The shield is folded around the insulative housing by sheet metal material, forming a front surface extending over the mating surface and having an opening aligned with the cavity, and a tongue extending from the shield. A contact member is formed in a part of the opening corresponding to the cavity for holding the grounding contact and enters into the corresponding cavity to engage with the grounding terminal post. so that when the signal contact and the ground contact engage with the corresponding signal terminal pole and ground terminal pole, the shield prevents the engagement of the contact member and the ground terminal pole. The shielded electrical connector is grounded through the shielded electrical connector. 2. In the shielded electrical connector according to claim 1, the shield is formed from a material having the opening in the central portion, and both sides of the central portion are bent to define a box for accommodating the electrical connector. What is claimed is: 1. A shielded electrical connector characterized in that the shielded electrical connector is adapted to: