CN201438535U - Electric connector - Google Patents

Abstract

The utility model relates to an electrical connector for electrically connecting a chip module to a circuit board, which comprises: an insulating body provided with a plurality of terminal accommodation holes and a plurality of conductive terminals assembled in the terminal accommodation holes. The conductive terminal includes a base, a contact portion above the base, and a clamping arm bent outwardly under the base. The terminal receiving hole includes a holding groove and a receiving groove for fixing solder balls, and a resisting block is provided at the bottom of the receiving groove. A protruding portion is provided at the end of the clamping arm of the conductive terminal. The solder ball and the conductive terminal are sequentially assembled from the top of the terminal receiving hole, the lower half of the solder ball is against the edge of the resisting block of the receiving groove, the protrusion of the clamping arm is against the upper part of the solder ball, and the clip The protruding part of the holding arm cooperates with the resisting block of the receiving groove to jointly hold the solder ball. The electric connector of the utility model can reliably fix the tin ball.

Description

electrical connector

【Technical field】

The utility model relates to an electric connector, in particular to an electric connector installed on a circuit board for connecting chip modules.

【technical background】

Chinese Utility Model Patent No. 2520023 discloses an electrical connector for electrically connecting a chip module to a printed circuit board, which includes an insulating body with terminal holes and terminals accommodated in the insulating body. Wherein, the terminal includes: a base, a positioning portion protruding from the upper end of the base to opposite sides and held in the terminal hole, a contact portion extending upward from the positioning portion for contacting the chip module, and a bottom at the base for clamping solder balls the clamping part. Wherein, the clamping part includes a first clamping arm extending downward in the middle of the base and a second clamping arm located on both sides of the first clamping arm horizontally protruding forward and then bent downward, the first clamping arm A clamping space capable of accommodating solder balls is formed between the second clamping arm and the second clamping arm. When the solder ball is implanted into the clamping space, the solder ball and the clamping arm squeeze each other, and the two clamping arms are opened to the outside through extrusion, so that the clamping space increases, and the clamping arm and the solder ball interfere with each other to clamp Solder balls.

However, the above-mentioned electrical connector has at least the following disadvantages: the structure of the conductive terminal of the existing electrical connector is relatively complicated, and the first clamping arm and the second clamping arm of the clamping part can be obtained only after several times of bending. And it's a waste of material. The inner side of the second clamping arm of the conductive terminal is a horizontal plane. When the second clamping arm and the first clamping arm clamp the solder ball, there is only point contact between the clamping arm and the solder ball, and the interference fit between them is not reliable. , the solder balls may fall from the clamping portion of the conductive terminal, thereby affecting the electrical connection between the electrical connector and the printed circuit board.

Therefore, it is indeed necessary to improve the existing electrical connectors to overcome the aforementioned defects of the prior art.

【Content of utility model】

The purpose of the utility model is to provide an electrical connector capable of stably holding solder balls.

The purpose of this utility model is achieved through the following technical solutions: an electrical connector for electrically connecting a chip module to a circuit board, which includes: an insulating body provided with a plurality of terminal receiving holes, assembled in the terminal receiving holes A plurality of conductive terminals and a plurality of solder balls, the conductive terminals include a base, a contact portion located above the base, and a clamping arm bent outwardly under the base, and the terminal receiving hole includes a holding groove and a receiving groove for fixing the solder ball The end of the clamping arm of the conductive terminal is provided with a protruding part, and the bottom of the receiving groove of the terminal receiving hole is provided with a resisting block. The solder ball and the conductive terminal are sequentially assembled from above the terminal receiving hole, and the protruding part of the clamping arm resists. The upper half of the solder ball leans against the edge of the resisting block of the receiving tank, and the lower part of the solder ball abuts against the edge of the resisting block of the receiving tank. The protrusion of the clamping arm cooperates with the resisting block of the receiving tank to jointly hold the solder ball.

Compared with the prior art, the electrical connector of the utility model has the following beneficial effects: the clamping arms of the conductive terminals of the electrical connector of the utility model cooperate with the terminal receiving holes to reliably fix 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 three-dimensional exploded view of the electrical connector of the present invention.

Fig. 3 is a cross-sectional plan view of the electrical connector of the present invention.

Fig. 4 is a cut-away perspective view of the electrical connector of the present invention.

【Detailed ways】

Please refer to Fig. 1 and Fig. 4 for details. The electrical connector of the present invention includes an insulating body 1 provided with a plurality of terminal receiving holes 10, a plurality of conductive terminals 2 accommodated in the terminal accommodating holes 10, and held at the bottom of the conductive terminals 2. The tin ball3. Wherein, only one terminal receiving hole 10 of the insulating housing 1 , a conductive terminal 2 accommodated in the corresponding terminal hole 10 and a solder ball 3 held at the bottom of the conductive terminal 2 are shown in the drawing.

Please refer to FIG. 2 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, extending upwards from the upper end of the base 20 and bending to form an arc. The contact portion 24 is shaped, an opening 21 is punched out in the middle of the lower half of the base 20 , and an elastic clamping arm 22 extends outward from the bottom edge of the opening 21 and folds downward into a roughly arc-shaped structure. An inwardly protruding protruding portion 23 is formed on the inner side of the end of the clamping arm 22 , and outwardly protruding retaining portions 25 are formed on opposite sides of the lower half of the base portion 20 .

Please refer to FIGS. 2 to 4 for details. The terminal receiving hole 10 of the insulating body 1 of the electrical connector of the present invention includes two parts connected to each other, which are respectively the holding groove 100 for holding the base 20 of the conductive terminal 2 and for The accommodating groove 101 for accommodating the clamping arm 22 of the conductive terminal 2 and the solder ball 3 , wherein a pair of resisting blocks 1010 close to each other are provided on opposite sides of the lower bottom surface of the accommodating groove 101 .

When assembling the conductive terminal 2 in the terminal receiving hole 10, first assemble the solder ball 3 into the receiving groove 101 of the terminal receiving hole 10 from above the terminal receiving hole 10, and the resisting block 1010 of the receiving groove 101 can resist the solder ball 3 to prevent It falls out of the storage tank 101, the upper half of the solder ball 3 is held in the storage tank 101, the lower half of the solder ball 3 is close to the middle of the solder ball 3 against the edge of the block 1010, and the lower half of the solder ball 3 is partially It protrudes from the lower bottom surface of the receiving groove 101 . Then the conductive terminal 2 is assembled in the holding groove 100 of the terminal receiving hole 10 from the top of the terminal receiving hole 10, and the base portion 20 and the holding portion 25 of the conductive terminal 2 are fixed in the holding groove 100 of the terminal receiving hole 10. The arm 22 is accommodated in the receiving groove 101 of the terminal receiving hole 10, the clamping arm 22 clamps the upper half of the solder ball 3, and the protrusion 23 of the clamping arm 22 abuts against the upper half of the solder ball 3, and the above-mentioned protrusion The portion 23 can penetrate into the solder ball 3 when the solder ball 3 is in a semi-molten state. At this time, the resisting block 1010 of the receiving groove 101 of the terminal receiving hole 10 cooperates with the clamping arm 22 of the conductive terminal 2 to stably hold the solder ball 3 in the terminal receiving hole 10 .

The solder ball 3 and the conductive terminal 2 of the electrical connector of the present utility model are sequentially assembled in the terminal receiving hole 10 from above the terminal receiving hole 10, and the elastic clamping arm 22 of the conductive terminal 2 clamps the upper half of the solder ball 3, The protruding portion 23 of the clamping arm 22 abuts against the solder ball 3, cooperates with the resisting block 1010 of the terminal receiving hole 10, and holds the solder ball 3 in the terminal receiving hole 10, so that the electrical connector is welded to the circuit board (not shown). icon) above.

Claims (7)

1. electric connector, be used to electrically connect chip module to circuit board, it comprises: the insulating body that is provided with the plurality of terminals accepting hole, be assembled in plurality of conductive terminals and some tin balls in the terminal accommodation holes, described conducting terminal comprises base portion, be positioned at the contact site of base portion top and be positioned at the base portion below clamping limb of bending laterally, terminal accommodation holes comprises holding slot and is used for fixing the accepting groove of tin ball, it is characterized in that: the end of the clamping limb of conducting terminal is provided with protuberance, the bottom of the accepting groove of terminal accommodation holes is provided with baffle, tin ball and conducting terminal are gone into from the terminal accommodation holes upper set successively, the protuberance of clamping limb is against the first half of tin ball, the latter half of tin ball is resisted against the edge of the baffle of accepting groove, the protuberance of the described clamping limb common fixing tin ball that matches with the baffle of accepting groove.

2. electric connector as claimed in claim 1 is characterized in that: described conducting terminal also is included in opening that base portion the latter half punches out and the holding parts that outwards protrudes out from the both sides of base portion.

3. electric connector as claimed in claim 2 is characterized in that: described clamping limb stretches out from the root edge of described opening, the roughly curved structure of described clamping limb.

4. electric connector as claimed in claim 4 is characterized in that: described holding slot and accepting groove are interconnected.

5. electric connector as claimed in claim 4 is characterized in that: described holding slot is used for the base portion of fixing conducting terminal, and accepting groove is used to accommodate the clamping limb of conducting terminal.

6. electric connector as claimed in claim 5 is characterized in that: the baffle of described accepting groove can be kept out the tin ball and prevent that the tin ball from dropping out from accepting groove.

7. electric connector as claimed in claim 6 is characterized in that: the latter half of described tin ball partly protrudes from the bottom surface of accepting groove.

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