CN1222775A - High Density Electrical Connector - Google Patents

Abstract

A high-density electric connector is used for being installed on a circuit board and butted with a butting connector and mainly comprises an insulating body, a plurality of terminals, a metal shielding shell and at least one metal guide post, wherein a plurality of terminal channels are arranged between a first surface and a second surface of the insulating body and can accommodate the terminals, at least one guide post insertion hole extending to the second surface is formed in the proper position of the first surface, the metal cover covers the first surface of the insulating body, an opening is formed in the position corresponding to the guide post insertion hole, a plurality of contact finger sheets integrally extend downwards along the periphery of the metal cover, and the metal guide post is used for being inserted into and penetrating through the guide post insertion hole.

Description

High Density Electrical Connector

The invention relates to a high-density electrical connector, in particular to a high-density electrical connector with good shielding and grounding effects and good assembly performance.

In the current electronics industry, a D-type connector has been widely used, especially in the computer industry, it is used to install on a circuit board and connect the circuit on the board to the mating connector . In practical applications, this type of electrical connector usually has two types of male seat and female seat with roughly the same shape, and they can be mated with each other. A mating notch protrudes from the direction, and several conductive terminals are installed inside the notch. In some applications, in order to avoid electromagnetic interference (EMI), the mating surface is also coated with a metal shield. Although this type of connector has many different changes in appearance, its basic structure still does not deviate from the above-mentioned type.

With the high performance of computers or electronic products, there are gradually high-density requirements for D-type connectors. The term "high-density" used here means that the connector shell must be miniaturized but must have a larger number of terminals. . However, as the distance between terminals becomes smaller and smaller, how to ensure that electrical transmission is not disturbed by noise has become a problem that must be solved when developing high-density connectors. The noise interference is generally divided into two types, one is electromagnetic interference (EMI) and the other is electrostatic interference (ESD). Basically, the reason for electromagnetic interference is that the electronic components carrying current will emit electromagnetic waves and interfere with each other. The method to prevent electromagnetic interference is usually to install a metal shielding shell on the insulating shell of the electrical connector. For example as disclosed in US Patent No. 4,842,528. As for electrostatic interference, there are more reasons. For example, when the human body touches electronic components in a dry environment or the electrostatic capacitance naturally formed between two electronic components, it will release static charges and interfere with the surrounding electronic components. A method is disclosed in U.S. Patent No. 5,118,306 A grounding method for discharging static electricity. In addition to the metal shielding shell, a metal grounding piece is additionally installed. One end of the metal grounding piece has a screw hole, which can be fixed to the metal shielding shell with a screw, and the other end is Pins are formed, which can be inserted into the holes on the circuit board and connected to the ground conductor. Similar designs can also be seen in Taiwan Patent No. 81205708 and No. 81213628. In addition, in some designs, the grounding piece is integrally formed with the metal shielding shell, and then combined with the insulating body and the circuit board by screwing or riveting, such as U.S. Patent No. 4,938,704, No. No. 4,512,618, and Taiwan Patent Nos. 83212722, 81210870, and 81210871, etc., are hereby incorporated by reference.

It can be easily understood from the above description that the high-density electrical connectors in the prior art require quite a lot of components in assembly, such as fixing components required for combining the metal shell and the insulating body, such as screws, rivets, etc., and/or The components required for the connection between the grounding plate and the metal shell, plus the holding components required for the entire connector to be installed on the circuit board, so many components not only increase the manufacturing cost but also require considerable man-hours. Furthermore, Due to the increase of the manufacturing process, it is also more difficult to manufacture and assemble and relatively increases the defect rate of the product.

The main purpose of the present invention is to solve the disadvantages of the prior art and provide a high-density electrical connector with good shielding effect and grounding performance while reducing the number of assembly components.

Another object of the present invention is to provide a high-density electrical connector with two grounding paths that can be selected according to actual usage conditions.

Another object of the present invention is to provide a high-density electrical connector that guides the mating connector to be inserted and simultaneously eliminates static electricity on the mating connector.

In order to achieve the above object, the present invention provides a high-density electrical connector on the one hand, which is installed on an electronic device for docking with a pair of docking connectors, including:

At least one insulating body has a first surface and a second surface, several terminal passages are formed between the two surfaces, and at least one guide post insertion hole extending to the second surface is provided at an appropriate position on the first surface, and the guide post A step is formed inside the socket between the first surface and the second surface;

Several terminals are accommodated in the terminal channel;

At least one conductive shielding shell covers at least a part of the first surface of the insulating body, and an opening is opened at a position corresponding to the guide post insertion hole, and at least one contact finger integrally extends downward along the edge of the opening;

At least one conductive guide post, which can be inserted into and pass through the guide post insertion hole, has a shoulder and an insertion part, the shoulder abuts against the step and contacts the contact finger Close contact is formed, and the bottom end of the insertion part is riveted to the second surface.

Another aspect of the present invention provides a shielding device for an electrical connector, which is used to be installed on an insulating housing of an electrical connector having at least one guide post insertion hole, comprising:

At least one conductive shielding shell, which can cover at least part of the surface of the insulating shell, and has an opening formed at a position corresponding to the guide post insertion hole;

At least one conductive guide post has an insertion portion that can be inserted into and pass through the guide post insertion hole and the opening, and is in contact with at least a part of the opening. It has a head, a shoulder and an insertion part, the head is used to make contact with the socket first and then guide the socket to be fully inserted, and the shoulder is formed with the contact fingers close contact, and the bottom end of the insertion part is riveted to the second surface of the insulating body.

A preferred embodiment of the high-density electrical connector of the present invention will be described in detail below with accompanying drawings, but this embodiment is only used to illustrate the essence of the present invention, not to limit the scope of the present invention, wherein

Fig. 1 is a three-dimensional exploded perspective view of a high-density electrical connector of the present invention;

Fig. 2 is the three-dimensional perspective view of the metal shielding shell of the high-density electrical connector of the present invention;

3 is a perspective view of the high-density electrical connector of the present invention after assembly;

Figure 4 is a sectional view along the line IV-IV in Figure 3;

FIG. 5 is a perspective view of FIG. 3 rotated at an angle, in which the bottom of the electrical connector of this embodiment can be seen.

preferred embodiment

Please refer to Fig. 1, it is the three-dimensional perspective view of the high-density electrical connector of the preferred embodiment of the present invention, mainly comprises a generally elongated insulating housing 10, a metal shielding shell 20, two metal guide posts 30 and Several terminals 40 (only two are shown for brevity in the drawing). Wherein the insulating body 10 has a first surface 11 and a second surface 12 opposite to the first surface 11, an elongated frame-shaped socket 13 extends upward from the first surface 11 integrally, and its inner wall on both sides There are a plurality of terminal slots 14 penetrating through the second surface 12 for accommodating a plurality of terminals 40 therein. In addition, the two guide post insertion holes 15 are located at both ends of the first surface 11 and penetrate to the second surface 12, wherein the diameter of the guide post insertion holes 15 on the first surface 11 is roughly hexagonal, and slightly larger than that on the second surface. The aperture is substantially circular, so a stepped portion 151 is formed between the two surfaces 11, 12 inside the guide post insertion hole 15, and three wedge-shaped protrusions 16 are respectively formed on the two side walls of the insulating body 10 (because Viewing angle relationship only shows one side), the bump 16 is used as a holding device when mated with the metal shielding shell 20 .

Please refer further to FIG. 2 , which is a perspective view of the metal shielding shell 20 of this embodiment, wherein the shielding shell 20 has a flat plate portion 21, and a frame body 22 integrally extends upward from the flat plate portion 21, and the frame body 22 forms a just The socket 13 of the insulating body 10 can be framed in the shape inside, and a perforation 23 is also respectively provided at the two ends of the flat plate part 21 corresponding to the guide post insertion hole 15 of the insulating body 10, and along the edge of each opening 23 to Four contact fingers 231 are integrally extended from the bottom. The contact fingers 231 are in the shape of a long and narrow sheet and their tail ends are slightly bent towards the inside of the opening 23. In addition, the parts near the opening 23 at both ends of the flat plate 21 are respectively A grounding pin 24 integrally extends downwards from both sides, and buckle ears 26 with closed openings 25 are also integrally extended downwards from the positions corresponding to the wedge-shaped protrusions 16 along the two sides of the flat plate portion, and the buckle ears 26 are used for The wedge-shaped protrusion 16 is snapped together as a fixing device when the metal shielding shell 20 is combined with the insulating body 10 . However, only this kind of fixing device is not enough to form a stable combination between the insulating body 10 and the metal shielding exterior 20, because the protrusion 16 and the buckle ear 26 cannot be completely sealed due to manufacturing tolerances. The invention also provides a method for strengthening fixation.

Please refer to FIG. 1 and FIG. 5 again, the metal guide post 30 is substantially cylindrical, has a conical head 31, and a hexagonal shoulder 32 integrally extends from the bottom of the head 31. , and a cylindrical insertion portion 33 extends from the bottom of the shoulder portion 32, wherein the bottom 331 of the insertion portion 33 can be seen from FIG. The hollow through hole 332 of the internal thread 333 .

Please refer to Figures 3, 4, and 5 together, wherein Figure 3 is a three-dimensional view of this embodiment after assembly, and it can be clearly seen from the figure that the metal shielding shell 20 is covered on the first surface 11 of the insulating body 10, And the socket 13 is framed in the metal frame 22 to form a complete shield. From the sectional view of Fig. 4, it can be seen that the metal guide post 30 is inserted into the guide post insertion hole 15 of the insulating body, wherein the shoulder portion 32 abuts against the step portion 151 in the guide post insertion hole 15 and cooperates with it. The bottom 331 of the insertion portion 33 is riveted on the second surface 12 of the insulating body 10 , so that the metal shielding shell 20 can be more closely combined with the insulating body 10 . After assembly, the connector can be directly fixed on a circuit board (not shown) with a screw by means of the threaded through hole 332 of the insertion part 33 . In addition, it can also be clearly seen from FIG. 4 that the shoulder portion 32 of the metal guide post 30 is in close contact with the contact finger 231 of the metal shielding shell 20, so that all static charges formed on the metal shielding shell 20 can be released by contact. The fingers 231 are conducted to the metal guide post 30, and then the bottom 331 of the metal guide post 30 is in contact with the grounding circuit of the circuit board (not shown) to discharge the static charge, or the static charge on the metal shielding shell 20 can be directly grounded through it The pin 24 is in contact with a ground jack (not shown) on the circuit board for discharge. The above two ground paths can be selected according to the actual needs of the user.

After the high-density electrical connector of this embodiment is installed on the circuit board, it can be docked with a mating connector (not shown), and the mating connector can imagine that it also has a plug interface with this embodiment. 13 matching sockets with the same shape, and the position corresponding to the metal guide post 30 should have a conical recess that allows the guide post head 31 to be inserted, so that before the terminals of the two connectors are in electrical contact, the butt connector The static charge on the metal shell can be released by first contacting the guide post head 31 , and then guided by the cylindrical metal guide post 30 to fully insert the mating connector to complete the electrical connection.

As can be seen from the above description, the present invention can completely combine the metal shielding shell 20, the insulating body 10 and the circuit board with only the metal guide post 30, and also has the grounding function of discharging static electricity, greatly reducing the manufacturing cost. cost and assembly time. But the above is only a preferred embodiment of the present invention, the spirit of the present invention is not limited thereto, for example, as long as the shape of the socket can be matched with the butt connector, any shape can be used, and the insertion position of the metal guide post can also be used. It can be formed at other positions than the two ends of the insulating body, and the number is not limited to two, and such modifications and changes are included in the appended claims of the present invention.

Claims (14)

1. A high-density electrical connector, which is installed on an electronic device for docking with a pair of connectors, including: At least one insulating body has a first surface and a second surface, several terminal passages are formed between the two surfaces, and at least one guide post insertion hole extending to the second surface is provided at an appropriate position on the first surface, and the guide post A step is formed inside the socket between the first surface and the second surface; Several terminals are accommodated in the terminal channel; At least one conductive shielding shell covers at least a part of the first surface of the insulating body, and an opening is opened at a position corresponding to the guide post insertion hole, and at least one contact finger integrally extends downward along the edge of the opening; At least one conductive guide post, which can be inserted into and pass through the guide post insertion hole, has a shoulder and an insertion part, the shoulder abuts against the step and contacts the contact finger Close contact is formed, and the bottom end of the insertion part is riveted to the second surface. 2. The high-density electrical connector as claimed in claim 1, wherein the bottom end of the insertion portion of the guide post is connected to the grounding circuit of the circuit device, thereby forming a first grounding path. 3. The high-density electrical connector as claimed in claim 1 or 2, wherein said shielding shell further extends downward integrally from the edge of the flat plate at least one grounding pin can be inserted into a grounding hole on the circuit device, thereby forming a first Two ground paths. 4. The high-density electrical connector according to claim 1, wherein several protrusions are formed on the surrounding wall of the insulating body, and the shielding shell further integrally extends downwards several buckles with closed openings at the edge of the flat plate portion, And the shielding shell is combined with the insulating body by embedding the lug into the projection. 5. The high-density electrical connector as claimed in claim 1, wherein the contact fingers are curved and elongated sheet-like plates. 6. The high-density electrical connector as claimed in claim 1, wherein a threaded through hole is formed inside the insertion portion of the guide post. 7. The high-density electrical connector as claimed in claim 1, wherein the guide post further comprises a head protruding from the first surface. 8. The high-density electrical connector as claimed in claim 7, wherein the head of the guide post is in the shape of a conical column. 9. A shielding device for an electrical connector, used to be installed on an insulating housing of an electrical connector having at least one guide post insertion hole, comprising: At least one conductive shielding shell, which can cover at least part of the surface of the insulating shell, and has an opening formed at a position corresponding to the guide post insertion hole; At least one conductive guide post has an insertion portion that can be inserted into and pass through the guide post insertion hole and the opening, and is in contact with at least a part of the opening. 10. The shielding device according to claim 9, wherein at least one contact finger integrally extends downward along the edge of the opening of the conductive shielding shell and can be in contact with the guide post. 11. The shielding device according to claim 9, wherein the outer diameter of at least a portion between the two ends of the guide post is greater than the inner diameter of at least a part of the guide post insertion hole of the insulating housing, thereby enabling at least a portion of the guide post to A part is fixed in the guide post insertion hole. 12. The shielding device as claimed in claim 9, wherein said guide post further has a head protruding from the shielding surface of said insulating body. 13. The shielding device according to claim 9, wherein the bottom of the insertion portion of the guide post is riveted to the opposite surface of the shielding surface. 14. The shielding device according to claim 9, wherein a threaded through hole is formed inside the insertion portion of the guide post.

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