CN201638975U - Electric connector - Google Patents

Abstract

An electric connector can electrically connect a chip module to a printed circuit board, and comprises an insulating body, a plurality of conductive terminals contained inside the insulating body, and solder balls fixed at the bottoms of the terminals. The insulating body comprises a base with a contact face and a mounting face; the base is provided with a plurality of terminal containing grooves penetrating through the contact face and the mounting face; at least one lateral wall of each terminal containing groove forms a notch at a position close to the bottom end of the mounting face; and the notch can provide primary positioning function when the solder balls are assembled into the insulating body. Accordingly, the electric connector can ensure position uniformity after the solder balls are pressed into the insulating body, and realizes fine positioning of the solder balls.

Description

electrical connector

【Technical field】

The utility model relates to an electric connector, in particular to an electric connector capable of electrically connecting a chip module to a printed circuit board.

【technical background】

Chinese Utility Model Patent No. 2643493 discloses an electrical connector for electrically connecting a chip module to a printed circuit board, which includes: an insulating body and a number of conductive terminals accommodated in the insulating body, and the insulating body is provided with accommodating solder balls The receiving hole and the terminal through hole communicating with the receiving hole for receiving the conductive terminal. The conductive terminal includes a main body that is assembled in the terminal through hole and has a substantially vertical structure, a contact portion protruding from the upper surface of the terminal through hole, and a soldering portion protruding from the lower surface of the insulating body for holding solder balls. Wherein, the free end of the soldering part is provided with a roughly arc-shaped curved hook, and the upper surface of the curved hook supports the bottom of the solder ball and holds the solder ball in the receiving hole.

However, the electrical connector has at least the following disadvantages: when the solder ball is assembled into the receiving hole of the insulating body in the vertical direction, since the solder ball itself is a relatively soft structure, it may be pushed in due to external force during the vertical assembly process. Severe deformation occurs and cannot be assembled to the expected position according to the expected design, and cannot meet the design requirements, thereby affecting the electrical connection between the electrical connector and the printed circuit board.

In view of this, it is necessary to provide an improved electrical connector to overcome the disadvantages of the electrical connector.

【Content of utility model】

The purpose of the present invention is to provide an electrical connector, which can realize good assembly and positioning of solder balls, thereby providing an electrical connector with stable electrical connection.

The purpose of this utility model is achieved through the following technical solutions: an electrical connector that can electrically connect a chip module to a printed circuit board, which includes: an insulating body, a number of conductive terminals accommodated in the insulating body, and a terminal held at the bottom of the terminal Solder balls, the insulating body includes a base body with a contact surface and a mounting surface, the base body is provided with a number of terminal receiving grooves penetrating through the contact surface and the mounting surface, wherein at least one side wall of the terminal receiving groove is at the bottom of the terminal receiving groove close to the mounting surface A notch is formed at the end, and the notch can provide an initial positioning function when the solder ball is assembled into the insulating body.

Compared with the prior art, the electrical connector of the utility model has the following beneficial effects: the side wall bottom surface of the terminal receiving groove of the insulating body of the electrical connector is provided with a notch, which can provide the initial positioning function for the solder ball to be assembled into the insulating body , to ensure the consistency of the solder balls after being pressed into the insulating body, and to achieve good positioning of the solder balls.

【technical background】

FIG. 1 is a three-dimensional assembled view of the electrical connector of the present invention.

FIG. 2 is a perspective view of the insulating body of the electrical connector shown in FIG. 1 .

FIG. 3 is a unit of the electrical connector shown in FIG. 1 , showing a state in which solder balls are pre-positioned on the insulating body.

FIG. 4 is similar to FIG. 3 , showing the state after the solder balls are completely assembled into the insulating body.

FIG. 5 is an exploded perspective view of a unit of the electrical connector shown in FIG. 4 .

FIG. 6 is a bottom view of a unit of the electrical connector shown in FIG. 4 .

【Detailed ways】

Please refer to FIGS. 1 to 6 for details. The electrical connector 100 of the present invention can electrically connect a chip module (not shown) to a printed circuit board (not shown). It includes an insulating body 1 and is housed in the insulating body 1. Several conductive terminals 2 and solder balls 3 held at the bottom of the conductive terminals 2 .

Please refer to FIG. 2 for details. The insulating body 1 is roughly rectangular, and includes a base 11. The base 11 has a contact surface 110 for receiving a chip module (not shown) and a mounting surface facing a printed circuit board (not shown). Surface 111. The base body 11 is provided with a plurality of terminal receiving grooves 112 penetrating through the contact surface 110 and the installation surface 111 . The terminal accommodating grooves 112 are roughly arranged in a rectangular array. Please refer to FIG. 3 and FIG. 4, which only shows a unit of the insulating body 1, wherein, on one side of the mounting surface 111 of the insulating body 1, a group of relatively parallel side walls of each terminal receiving groove 112 A notch 114 is provided at the middle position of 113 . The notch 114 is recessed upward from the bottom surface of the corresponding sidewall 113 , and is arranged in the direction in which the solder ball 3 is assembled into the insulating body 1 , and can provide an initial positioning function for the solder ball 3 to be assembled into the insulating body 1 . The inner wall of the terminal receiving groove 112 is provided with an inclined guide surface 115 , which can further guide the solder ball 3 to be smoothly assembled directly under the terminal receiving groove 112 of the insulating body 1 .

Please refer to FIG. 5 for details. The conductive terminal 2 of the present invention is integrally stamped from a metal material, which includes a base 20 with a roughly plate-like structure, a holding portion 21 extending vertically upward from the top of the base 20, and a self-holding The auxiliary part 22 is bent on one side of the part 21 and extends vertically upward, the elastic arm 23 extends obliquely upward from the top of the auxiliary part 22 , and the clamping part 24 is bent downward from the bottom end of the base part 20 . Several barbs (not shown) are provided on both sides of the base 20 to stably hold the conductive terminal 2 in the terminal receiving groove 112 of the insulating body 1 . The auxiliary portion 22 is substantially perpendicular to the holding portion 21 . The top of the elastic arm 23 is provided with an arc-shaped contact end 231 which is connected to a chip module (not shown). The holding portion 24 is slightly arc-shaped, and has an arc-shaped hook portion 241 at its end, which can stably hold the solder ball 3 under the terminal receiving groove 112 of the insulating body 1 .

The assembly process of the electrical connector 100 is as follows: Firstly, the conductive terminal 2 is assembled into the terminal receiving groove 112 from the top of the insulating body 1, and then the electrical connector 100 is turned upside down, and the solder ball 3 is assembled from the bottom of the terminal receiving groove 112. , the solder ball 3 can be pre-positioned on the notch 114 on the side wall 113 of the terminal receiving groove 112 and the end of the holding part 24 of the conductive terminal 2. At this time, the holding part 24 has no elastic deformation, and then further external force is applied to make it Move along the inclined guide surface 115 to directly below the receiving groove 112, and at the same time cause the clamping portion 24 of the conductive terminal 2 to slide slightly upward relative to the solder ball 3, abutting against the upper half of the solder ball 3 (with an electrical connector 100 inverted angle), and finally apply a downward force to the clamping portion 24, so that it penetrates into the solder ball 3 against the side wall 113 of the terminal receiving groove 112, through which the solder ball 3 can be stably clamped in the terminal receiving groove 112 At this time, the hook portion 241 of the conductive terminal 2 can be buckled on the bottom outer edge of the solder ball 3, so that the solder ball 3 can be stably assembled by the bottom wall of the terminal receiving groove 112 and the buckling effect of the conductive terminal 2. Insulation body 1.

The side wall 113 of the terminal receiving groove 112 of the insulating body 1 of the electrical connector 100 of the present invention is provided with a notch 114 on a side close to the mounting surface 111 . The notch 114 can provide an initial positioning function for the solder ball 3 to be assembled into the insulating body 1 . The inner wall of the terminal receiving groove 112 is provided with an inclined guide surface 115, which can further guide the solder ball 3 to be smoothly assembled into the bottom of the terminal receiving groove 112 of the insulating body 1, and ensure the consistency of the solder ball 3 after being pressed into the insulating body 1. , to achieve good positioning of the solder balls 3 , thereby achieving good electrical connection performance of the electrical connector 100 .

The above is only one embodiment of the utility model, not all or the only implementation. Any equivalent change to the technical solution of the utility model adopted by those of ordinary skill in the art by reading the specification of the utility model shall be considered as the present invention. covered by the claims of the utility model.

Claims (6)

1. electric connector, can electrically connect chip module to printed circuit board (PCB), it comprises: insulating body, the tin ball that is contained in the plurality of conductive terminals of insulating body and is immobilizated in the terminal bottom, insulating body comprises the matrix that is provided with contact-making surface and installed surface, this matrix is provided with some terminal containing slots that run through contact-making surface and installed surface, it is characterized in that: at least one sidewall of each terminal containing slot is provided with recess in its side near installed surface, can be when tin ball group be gone into insulating body, initial alignment tin ball.

2. electric connector as claimed in claim 1 is characterized in that: respectively be provided with an above-mentioned recess on the centre position of the sidewall of one group of opposing parallel setting of described each terminal containing slot, this recess upwards caves in from installed surface and forms.

3. electric connector as claimed in claim 2 is characterized in that: inwall is provided with the guiding face of inclination around the described terminal containing slot, can guide tin ball group and go in the insulating body.

4. electric connector as claimed in claim 1 is characterized in that: described conducting terminal comprises base portion, upwards vertically extend the holding parts that is provided with from the base portion top, from holding parts one lateral buckling and extend the assisted parts that is provided with straight up, be inclined upwardly to extend the elastic arm that is provided with and bent downwards by the base portion bottom by the assisted parts top and extend the holding section that is provided with.

5. electric connector as claimed in claim 4 is characterized in that: the end of the holding section of described conducting terminal is provided with the arcuation hook part, the tin ball can be immobilizated in the terminal accommodating trench bottom.

6. electric connector as claimed in claim 4 is characterized in that: described conducting terminal base portion both sides are provided with hangnail, conducting terminal can be stablized to be immobilizated in the insulating body.

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