CN104241901A - Electric connector and manufacturing method thereof - Google Patents

Abstract

Electrical connector and method of manufacturing the same. An electrical connector for electrically connecting a chip module with a contact surface and a printed circuit board, which includes an insulating body, a conductive terminal held in the insulating body, and a shielding sheet held in the insulating body and surrounding the conductive terminal , the conductive terminal and the shielding sheet are integrally formed, the insulating body covers the conductive terminal and the shielding sheet in an insert molding manner, the insulating body is provided with a through groove for separating the conductive terminal from the shielding sheet, the electrical The connector process is simple and the cost can be reduced.

Description

Electrical connector and manufacturing method thereof

【Technical field】

The invention relates to an electrical connector and a manufacturing method thereof, in particular to an electrical connector electrically connecting a chip module and a printed circuit board and a manufacturing method thereof.

【Background technique】

Planar grid array electrical connectors are widely used in the electronic field to electrically connect chip modules to circuit boards, so as to realize the transmission of signals and data between chip modules and circuit boards. Such a technique is disclosed in "Nonlinear Analysis Helps Design LGA Connectors" (Connector Specifier, Februray 2001). The electrical connector includes a body and terminals accommodated in the body. When the electrical connector connects the chip module with the circuit board, the upper and lower contact points of the electrical connector terminals are in contact with the chip module and the conductive sheet of the circuit board respectively. Crimping to form the signal transmission between the chip module and the circuit board. However, with the continuous development of electronic technology, the arrangement density of the conductive sheets of the chip module and the circuit board is increasing, and the size and height of the planar grid array electrical connector used in this field are becoming smaller and smaller, and the terminal The arrangement density is required to be more and more dense. In this case, when the electrical connector is connected to the signal transmission between the chip module and the circuit board, it will inevitably cause electromagnetic interference when adjacent terminals with small spacing are transmitting signals, and once electromagnetic interference occurs between adjacent signals, then It will definitely affect the quality of signal transmission between the chip module and the circuit board. Therefore, in order to ensure the integrity of signal transmission between the chip module and the circuit board, it is particularly important to have an electrical connector with a shielding device to prevent electromagnetic interference.

China Taiwan Patent No. M419248 discloses an electrical connector assembly capable of shielding electromagnetic interference. It includes an insulating body and conductive terminals accommodated in the insulating body. The insulating body has a receiving surface and a mounting surface and is provided with several through receiving surfaces and The terminal slot on the installation surface, wherein the terminal slot includes a first slot and a second slot, the conductive terminal is accommodated in the first slot, and the electrical connector also includes a metal shielding sheet accommodated in the second slot.

In view of the above situation, it is indeed necessary to provide a new type of electrical connector and its manufacturing method to solve the defects in the existing technical solutions.

【Content of invention】

The object of the present invention is to provide an electrical connector with simple process and low cost and its manufacturing method.

The electrical connector of the present invention is realized through the following technical solutions: an electrical connector for electrically connecting a chip module with a contact surface and a printed circuit board, the electrical connector includes an insulating body, a conductive terminal held in the insulating body, and a holding The shielding sheet inside the insulating body and surrounding the conductive terminal. The conductive terminal and the shielding sheet are integrally formed. The insulating body wraps the conductive terminal and the shielding sheet in an insert molding manner. A slot that separates the conductive terminal from the shield.

The present invention further defines: the insulating body includes a grid-shaped body portion, the body portion has an upper surface and a lower surface oppositely arranged, and the insulating body further includes Containment holes on the surface.

The present invention further defines that: the shielding sheet is embedded in the body part and protrudes from the upper surface at the intersection of the middle position of the body part and the grid to expose the contact surface of the chip module, the through groove is located at the intersection of the grid and Run through the shielding sheet from top to bottom.

The present invention further defines that: the conductive terminal includes a main body, a connecting portion extending downward from the main body, an elastic portion bent upward from the connecting portion and extending to one side of the main body, and an elastic portion bent from the elastic portion to a side away from the main body. The contact part is folded and extended, the main part is embedded in the insulating body, and the main part and the shielding sheet are integrally formed.

The present invention further defines that: the electrical connector further includes a conducting portion protruding from the lower surface of the insulating body and protruding toward the receiving hole for electrically connecting with the printed circuit board.

The electrical connector of the present invention is achieved through the following technical solutions: A method for manufacturing an electrical connector includes: providing a flat metal plate and stamping it to form a number of perforations and V-shaped grooves arranged in an array; The metal plate is cup-shaped by deep drawing; the terminal elastic arm and the shielding piece are formed by punching the bottom surface of the cup-shaped metal plate; the terminal elastic arm and the shielding piece are formed by plastic insert molding to form an insulating body; a through slot is provided to make the terminal elastic arm and the shielding The sheets are separated and the conductive terminals are formed by punching and bending the terminal spring arms.

The present invention further defines: the insulating body includes a grid-shaped body portion, the body portion has an upper surface and a lower surface oppositely arranged, and the insulating body further includes Containment holes on the surface.

The present invention further defines that: the shielding sheet is embedded in the main body and protrudes from the upper surface at the intersection of the middle position of the main body and the grid, and the through groove is located at the intersection of the grid and runs through the shielding sheet from top to bottom.

The present invention further defines that: the conductive terminal includes a main body, a connecting portion extending downward from the main body, an elastic portion bent upward from the connecting portion and extending to one side of the main body, and an elastic portion bent from the elastic portion to a side away from the main body. The contact part is folded and extended, and the main part is embedded in the insulating body.

The present invention further defines that: the electrical connector further includes a conducting portion protruding from the lower surface of the insulating body and protruding toward the receiving hole for electrically connecting with the printed circuit board.

Compared with the prior art, the electrical connector of the present invention has at least the following advantages: the conductive terminal and the shielding sheet are integrally formed, and the conductive terminal and the shielding sheet are covered by insert molding, and then the conductive terminal is separated from the shielding sheet through the through groove, and the process It is simple, can save material and cost, and has better shielding effect.

【Description of drawings】

Fig. 1 is a perspective view of the metal plate before the electrical connector of the present invention is formed.

Fig. 2 is a partially enlarged view of the circled part in Fig. 1 .

Fig. 3 is a perspective view of the metal plate of the present invention formed into a cup shape by deep drawing.

Fig. 4 is a perspective view of the terminal elastic arm and the shielding sheet formed by punching according to the present invention.

Fig. 5 is a perspective view of the insulating body covering the elastic arm of the terminal and the shielding sheet by insert molding according to the present invention.

Fig. 6 is a perspective view of the electrical connector after molding of the present invention.

FIG. 7 is a perspective view from another angle of the electrical connector in FIG. 6 .

【Detailed ways】

Please refer to FIG. 6 to FIG. 7, the present invention relates to an electrical connector 100 for connecting a chip module (not shown) with a contact surface (not shown) and a circuit board (not shown). The connector 100 includes an insulating body 2 , a plurality of conductive terminals 3 accommodated in the insulating body 2 , and a plurality of shielding sheets 17 accommodated in the insulating body 2 and surrounding the conductive terminals 3 .

Please refer to Fig. 1 to Fig. 6 to show the molding method for manufacturing the conductive terminal 3: provide a flat metal plate 1 and punch it to form a number of perforations 10 and V-shaped grooves 11 arranged in an array, the perforations 10 It is arranged in a matrix and makes the metal plate 1 form several units 12, and passes through the V-shaped groove 11 arranged between adjacent perforations 10 to facilitate deep extraction. The metal plate 1 is cup-shaped by deep drawing technology, and the V-shaped groove 11 is punched during the drawing process, so that the adjacent cup walls (not numbered) of the cup-shaped metal plate 1 form a gap 14 . The terminal elastic arm 15 and the shielding piece 17 are formed by blanking the bottom surface 13 of the cup-shaped metal plate 1. The terminal elastic arm 15 is arranged between the cup walls with the gap 14 and arranged along a diagonal line. The bottom surface 13 of the metal plate 1 A lead portion 15 is formed to be electrically connected to the printed circuit board, and the lead portion 16 is connected to the shielding sheet 17 . The elastic terminal arm 15 and the shielding sheet 17 form the insulating body 2 through plastic insert molding, the elastic terminal arm 15 and the shielding sheet 17 are held in the insulating body 2 , and at this time, the elastic terminal arm 15 and the shielding sheet 17 are connected together. A through slot 23 is provided for the stamping punch to enter to separate the terminal elastic arm 15 from the shielding sheet 17, and a cut surface (not labeled) is formed so that the conductive terminal 3 and the shielding sheet 17 communicate with the through slot 23, thereby being cut The tangent surface of the terminal communicates with the slot 23, and the terminal elastic arm 15 is separated from the shielding sheet 17 by punching the slot 23, and the terminal elastic arm 15 is further bent to form the conductive terminal 3.

Please refer to FIG. 6 to FIG. 7 which show the electrical connector 100 after molding. The conductive terminal 3 includes a main body 30 , a connecting portion 31 extending downward from the main body 30 , and is bent upward from the connecting portion 31 to the main body 30 . The elastic portion 32 extending on one side and the contact portion 33 bent and extended from the elastic portion 32 to the side away from the main body 30, the main body 30 is embedded in the insulating body 2, and the contact portion 33 is in electrical contact with the chip module .

The insulating body 2 includes a grid-shaped body portion 20, the body portion 20 has an upper surface 21 and a lower surface 22 oppositely arranged, and the insulating body 2 also includes a wall formed by the body portion 20 and penetrating through the upper surface 21. With the receiving hole 24 on the lower surface 22, the shielding sheet 17 is embedded in the body part 20 and protrudes out of the upper surface 21 at the intersection of the middle position of the body part 20 and the grid to expose the contact surface of the chip module. The through groove 23 is located at the intersection of the grates and penetrates the shielding sheet 17 from top to bottom.

The conductive terminal 3 and the shielding sheet 17 of the electrical connector 100 of the present invention are integrally formed. The insulating body 2 covers the conductive terminal 3 and the shielding sheet 17 in an insert-molded manner. The insulating body 2 is provided so that the conductive terminal 3 and the shielding sheet 17 separate through grooves 23 . In the present invention, the conductive terminal 3 and the shielding sheet 17 are integrally formed, and the insulating body 2 is molded by inserting. The process is simple, and no additional shielding metal plate is required, which can also save materials and costs.

It should be pointed out that the above description is only the best implementation mode of the present invention, not all implementation modes, and any equivalent changes to the technical solution of the present invention adopted by those of ordinary skill in the art by reading the description of the present invention are all part of the present invention. covered by the claims.

Claims (10)

1. An electrical connector, used to electrically connect a chip module and a printed circuit board, the electrical connector includes an insulating body, a conductive terminal held in the insulating body, and a shield held in the insulating body and surrounded by the conductive terminal The conductive terminal and the shielding sheet are integrally formed, the insulating body covers the conductive terminal and the shielding sheet in an insert molding manner, and the insulating body is provided with a through groove for separating the conductive terminal and the shielding sheet. 2. The electrical connector according to claim 1, wherein the insulating body comprises a grid-shaped body portion, the body portion has an upper surface and a lower surface oppositely arranged, and the insulating body further includes The receiving hole is formed by surrounding the main body and passing through the upper surface and the lower surface. 3. The electrical connector according to claim 2, wherein the shielding sheet is embedded in the main body and protrudes from the upper surface at the intersection of the middle position of the main body and the grid to expose the contact surface of the chip module , the through groove is located at the intersection of the grates and runs through the shielding sheet from top to bottom. 4. The electrical connector according to claim 1, wherein the conductive terminal comprises a main body, a connecting portion extending downward from the main body, and an elastic member bent upward from the connecting portion and extending to one side of the main body. part and the contact part bent and extended from the elastic part to the side away from the main part, the main part is embedded in the insulating body, and the main part and the shielding sheet are integrally formed. 5. The electrical connector according to claim 4, characterized in that: the electrical connector further comprises a conductive wire that protrudes from the lower surface of the insulating body and protrudes toward the receiving hole for electrical connection with the printed circuit board. department. 6. A method for manufacturing an electrical connector, comprising: providing a flat metal plate and stamping it to form a number of perforations and V-shaped grooves arranged in an array; making the metal plate form a cup by deep drawing The terminal elastic arm and the shielding sheet are formed by punching the bottom surface of the cup-shaped metal plate; the terminal elastic arm and the shielding sheet are formed by plastic insert molding to form an insulating body; a through groove is provided to separate the terminal elastic arm from the shielding sheet and the terminal is bent by punching The resilient arms form conductive terminals. 7. The method for manufacturing an electrical connector as claimed in claim 6, wherein the insulating body comprises a grid-shaped body portion, and the body portion has an upper surface and a lower surface oppositely arranged, The insulating body further includes a receiving hole formed by surrounding the body part and passing through the upper surface and the lower surface. 8. The method for manufacturing an electrical connector as claimed in claim 6, wherein the shielding piece is embedded in the main body and protrudes from the upper surface at the intersection of the middle position of the main body and the grid, and the The through slot is located at the intersection of the grates and runs through the shielding sheet from top to bottom. 9. The method for manufacturing an electrical connector as claimed in claim 6, wherein the conductive terminal comprises a main body, a connecting portion extending downward from the main body, bent upward from the connecting portion and extending toward the main body The elastic portion extending from one side and the contact portion bent and extended from the elastic portion to the side away from the main body, the main body is embedded in the insulating body. 10. The method for manufacturing an electrical connector as claimed in claim 6, wherein the electrical connector further includes protruding from the lower surface of the insulating body and protruding toward the receiving hole for electrical contact with the printed circuit board. Leading part of the sexual connection.