Double-sided contact connector

Abstract

The utility model provides a double-sided contact connector, which comprises a flat-plate-shaped insulating body, a contact area of the insulating body is provided with densely distributed accommodating grooves penetrating through the top surface and the bottom surface of the insulating body, and a metal terminal is fixedly held in each accommodating groove. Each metal terminal comprises a holding part, an upper arm and a lower arm, the upper arm obliquely extends upwards from the upper end of the holding part and then bends and extends downwards, the lower arm obliquely extends downwards from the lower end of the holding part and then bends and extends upwards, and the oblique high end of the upper arm and the oblique low end of the lower arm are contact ends in compression joint with the chip module and the circuit board respectively; the bent tail end of the upper arm and the bent tail end of the lower arm are in contact with each other when the contact ends of the upper arm and the lower arm are respectively in compression joint with the chip module and the circuit board; inclined extension parts of the metal terminals, which are inclined and extended upwards from the fixing parts and inclined and extended downwards from the fixing parts, are arc-shaped arms; the double-sided contact connector can ensure good contact.

Description

Technical Field

[0001] The utility model belongs to the field of connectors, and in particular relates to a double-sided contact connector. Background Art

[0002] LGA connectors (Land Grid Array connectors) are mostly used for CPU chip module connections. The traditional structure of LGA connectors is that the terminal contact point at the upper end of the metal terminal contacts the contact surface of the CPU chip module, and the welding point at the lower end of the metal terminal is welded to the PCB motherboard pad through a solder ball. However, high-density welding points may have poor welding, which may lead to abnormal circuit breaking.

[0003] In order to solve the problem of poor welding, the LGA type connector has been improved. The welding point at the lower end of the metal terminal is not welded to the PCB mainboard pad through a solder ball, but is in contact with the contact surface of the PCB like the terminal contact point at the upper end of the metal terminal. Contact conduction replaces welding conduction, so that the metal terminal of the LGA type connector does not need to be welded, which can reduce the circuit breaking abnormality caused by poor welding of high-density welding points. For example, the electrical connector disclosed in Chinese patent 202120407509.3 uses a metal terminal that does not need to be welded. Its metal terminal includes a base, an upper elastic arm and a lower elastic arm. The upper elastic arm is bent and extended upward from the upper end of the base, and the lower elastic arm is bent and extended downward from the lower end of the base. The upper elastic arm includes an upper extension arm, an upper contact portion, a first upper elastic arm, a second upper elastic arm and an upper abutment arm. The upper extension arm is bent and extended upward from the upper end of the base, and the upper contact portion is extended upward from the upper extension arm to electrically contact the chip module upward. The first upper elastic arm is extended downward and forward from the upper contact portion, and the second upper elastic arm is bent and extended downward and backward from the first upper elastic arm. The upper abutment arm is bent backward from the lower end of the second upper elastic arm to form the lower elastic arm. The lower extension arm is bent and extended downward from the lower end of the base, and a lower contact portion is extended downward from the lower extension arm for electrically contacting the circuit board downward. A first lower elastic arm is extended upward and forward from the lower contact portion, and a second lower elastic arm is bent and extended upward and backward from the first lower elastic arm. A lower abutment arm is bent and extended backward from the upper end of the second lower elastic arm. When the electrical connector is electrically connected to the chip module and the circuit board, the upper abutment arm and the lower abutment arm abut against each other.

[0004] The upper extension arm and the lower extension arm of the metal terminal of the above-mentioned electrical connector are both linear force arms, and the upper contact part and the lower contact part of the metal terminal are easily fatigued after being crimped by force, thereby causing poor contact. Therefore, it is necessary to improve it. Utility Model Content

[0005] The utility model aims to provide a double-sided contact connector to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the technical solution used in this utility model is:

[0007] A double-sided contact connector comprises a flat-plate-shaped insulating body, wherein the contact area of ​​the insulating body has densely distributed receiving grooves penetrating the top and bottom surfaces of the insulating body, wherein a metal terminal is fixed in each receiving groove, wherein the metal terminal comprises a retaining portion and an upper arm which first extends upwardly obliquely from the upper end of the retaining portion and then bends downwardly and extends, and a lower arm which first extends downwardly obliquely from the lower end of the retaining portion and then bends upwardly and extends, wherein the inclined high end of the upper arm and the inclined low end of the lower arm are both contact ends which are crimped with a chip module and a circuit board respectively, and the bent end of the upper arm and the bent end of the lower arm are in contact with each other when the contact ends of the upper arm and the lower arm are respectively crimped with the chip module and the circuit board, and the inclined extension parts which first extend upwardly obliquely from the retaining portion and first extend downwardly obliquely from the retaining portion of the metal terminal are both arc-shaped arms.

[0008] Furthermore, the lower end of the holding portion is provided with material strip connecting portions on both sides of the position where it is connected to the lower arm.

[0009] Furthermore, the width of the arc-shaped arm gradually decreases from the retaining portion toward the contact end.

[0010] Furthermore, the bent and extended parts of the upper arm that bends downward and the lower arm that bends upward are both bent arms, and the width of the bent arms gradually increases from the contact end to the bent end, and the width of the bent end of the bent arm is smaller than the width of the arc-shaped arm near the retaining portion.

[0011] Furthermore, the insulating body is in the shape of a rectangular flat plate, a cross dividing zone is provided in the middle of the insulating body, the contact area of ​​the insulating body is distributed in four areas of the cross dividing zone, and a material-cutting structure is provided on the dividing zone in the length direction of the cross dividing zone of the insulating body.

[0012] Furthermore, both ends of the insulating body in the length direction are fixed ends, the dividing strip of the cross dividing strip parallel to the two fixed ends is a fixed dividing strip, and the dividing strip of the cross dividing strip perpendicular to the two fixed ends is a non-fixed dividing strip. The excavation structure on the non-fixed dividing strip on both sides of the fixed dividing strip is a hole, and the number of holes on the non-fixed dividing strip on each side of the fixed dividing strip is at least one, and the hole is a through hole that passes through the top and bottom surfaces of the insulating body, or a blind hole that does not pass through the top and bottom surfaces of the insulating body.

[0013] Furthermore, the holes on the non-fixed dividing strip on each side of the fixed dividing strip are composed of a plurality of square holes, and the square holes are arranged in at least one row, and the arrangement direction of the square holes is perpendicular to the fixed dividing strip.

[0014] Furthermore, each of the fixed ends and the fixed dividing strips is respectively provided with at least one screw fixing hole, and the screw fixing holes on the two fixed ends and the fixed dividing strips are arranged on the same straight line.

[0015] Furthermore, each of the fixed ends and the fixed dividing strip is provided with a positioning column, and the positioning column on the fixed dividing strip is offset from the positioning columns on the two fixed ends.

[0016] Furthermore, the positioning columns on the two fixed ends are located on the same side of the non-fixed dividing zone, and the positioning columns on the fixed dividing zone are located on the other side of the non-fixed dividing zone. The top and bottom surfaces of the insulating body are both provided with the positioning columns, and each positioning column on the top surface of the insulating body corresponds to each positioning column on the bottom surface of the insulating body.

[0017] Compared with the prior art, the beneficial effects of the utility model are mainly reflected in: by designing the inclined extension part of the self-holding part of the metal terminal to extend upward and downward first, and the inclined extension part of the self-holding part to extend downward first, as an arc-shaped arm, after the contact end is compressed by force, good elasticity is maintained to ensure good contact; by designing the width of the arc-shaped arm to gradually decrease from the holding part to the contact end, and the width of the bent arm to gradually increase from the contact end to the bent end, after the contact end is compressed by force, good elasticity is further maintained to ensure good contact, and when the contact end is subjected to force, the arc-shaped arm and the bent arm will be deformed, and the gradual change in the size of the arc-shaped arm and the bent arm can evenly absorb stress, reducing Less fatigue and improved elasticity; by designing the material strip connection part at the lower end of the holding part, the assembly direction is from bottom to top, which prevents the metal terminal from withdrawing after the connector is locked on the circuit board; by providing a material-digging structure on the dividing strip and on the non-fixed dividing strips on both sides of the fixed dividing strip, the insulation body can be effectively prevented from warping; the positioning column is used to facilitate the alignment installation of the insulation body and improve the installation efficiency; the screw fixing hole is used to directly install and connect with the screw to improve the installation efficiency; the contact end of the metal terminal is connected to the chip module and the circuit board by crimping contact, and the metal terminal does not need to be welded, which can reduce the abnormal circuit breaking caused by poor welding of high-density welding points. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional exploded schematic diagram of the double-sided contact connector of the utility model;

[0019] Figure 2 Schematic diagram of the combination of the insulating body and the metal terminal Figure 1 ;

[0020] Figure 3 Schematic diagram of the combination of the insulating body and the metal terminal Figure 2 ;

[0021] Figure 4 It is a cross-sectional view of the combination of the insulating body and the metal terminal;

[0022] Figure 5 for Figure 4 A magnified view of position A is shown;

[0023] Figure 6 is a three-dimensional diagram of a metal terminal;

[0024] Figure 7 It is a front view of the metal terminal;

[0025] Figure 8 It is the right side view of the metal terminal;

[0026] Fig. 9 A top view of a metal terminal. DETAILED DESCRIPTION

[0027] In order to facilitate a better understanding of the purpose, structure, characteristics and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figure 1-9 As shown, the double-sided contact connector includes an insulating body 1 in the shape of a rectangular flat plate, with a cross dividing strip 11 in the middle of the insulating body 1, and the insulating body 1 also has contact areas 12 distributed in four areas of the cross dividing strip 11, and each contact area 12 has densely distributed receiving grooves 13 that penetrate the top and bottom surfaces of the insulating body 1, and each receiving groove 13 holds a metal terminal 2.

[0029] Both ends of the insulating body 1 in the length direction are fixed ends 14, the dividing strips of the cross dividing strip 11 parallel to the two fixed ends 14 are fixed dividing strips 111, and the dividing strips of the cross dividing strip 11 perpendicular to the two fixed ends 14 are non-fixed dividing strips 112, which are arranged along the length direction of the insulating body 1. The non-fixed dividing strips 112 on both sides of the fixed dividing strip 111 are provided with a material-cutting structure 113, which is a through hole that passes through the top and bottom surfaces of the insulating body 1. The material-cutting structure 113 on the non-fixed dividing strip 112 on each side of the fixed dividing strip 111 is composed of a plurality of square holes, which are arranged in a row, and the arrangement direction of the square holes is perpendicular to the fixed dividing strip 111.

[0030] Each of the fixed ends 14 and the fixed dividing strip 111 is provided with a screw fixing hole 15 and a positioning column 16. The positioning column 16 on the fixed dividing strip 111 is offset from the positioning columns 16 on the two fixed ends 14. The screw fixing holes 15 on the fixed dividing strip 111 and the screw fixing holes 15 on the two fixed ends 14 are arranged on the same straight line, and the holes next to each screw fixing hole 15 are material digging holes. The positioning columns 16 on the two fixed ends 14 are located on the same side of the non-fixed dividing strip 112, and the positioning columns 16 on the fixed dividing strip 111 are located on the other side of the non-fixed dividing strip 112. The positioning columns 16 are provided on the top and bottom surfaces of the insulating body 1. Each positioning column 11 on the top surface of the insulating body 1 corresponds to each positioning column 16 on the bottom surface of the insulating body 1, and these positioning columns 16 are integrally formed with the insulating body 1.

[0031] The metal terminal 2 includes a holding portion 21, an upper arm 22 that first extends upward and then bends downward from the upper end of the holding portion 21, and a lower arm 23 that first extends downward and then bends upward from the lower end of the holding portion 21. The upper end of the upper arm 22 and the lower end of the lower arm 23 are both contact ends 2a that are respectively crimped with the chip module 100 and the circuit board 200. The bent end of the upper arm 22 and the bent end of the lower arm 23 are in contact with each other when the contact ends 2a of the upper arm 22 and the lower arm 23 are respectively crimped with the chip module 100 and the circuit board 200. The inclined extension parts of the metal terminal 2 that first extend upward and first extend downward from the holding portion 21 are both arc-shaped arms 2b, and the convex arc surfaces of the two arc-shaped arms 2b are opposite. The lower end of the holding portion 21 is provided with a strip connection part 2c on both sides of the position connected to the lower arm 21. The width of the arc-shaped arm 2b gradually decreases from the holding portion 21 to the contact end 2a. The bent and extended parts of the upper arm 21 bending downward and the lower arm 22 bending upward are both bent arms 2d, and the width of the bent arm 2d gradually increases from the contact end 2a to the bending end, and the width of the bending end of the bent arm 2d is smaller than the width of the arc-shaped arm 2b near the retaining portion end 21.

[0032] The double-sided contact connector further comprises an upper cover 3 and a lower cover 4. The lower cover 4 is in the shape of a flat plate. The lower surface of the upper cover 3 is concave upward and the upper surface is convex upward to form a concave cavity. The chip module 100 is accommodated in the concave cavity. The circuit board 200 is located between the insulating body 1 and the lower cover 4. The upper cover 3 is expanded outward at the periphery of the convexity to form a fixed edge 31. The chip module 100 has an extended edge a corresponding to the fixed edge 31. The screw fixing hole 15 of the fixed end 14 passes through the fixed edge 31, the extended edge a, the circuit board 200 and the lower cover 4, and they are connected by screws 5 at the screw fixing hole 15. The screw fixing hole 15 of the fixed dividing strip 111 passes through the upper cover 3, the chip module 100, the circuit board 200 and the lower cover 4, and they are also connected by screws 5 at the screw fixing hole 15. Through the action of the upper cover 3 and the lower cover 4, the chip module 100 and the circuit board 200 are pressed and contacted with the contact ends 2a of the upper arm 22 and the lower arm 23.

[0033] Compared with the prior art, the beneficial effects of the utility model are mainly reflected in: by designing the inclined extension part of the self-holding portion 21 of the metal terminal 2 to extend upward and downward first, the arc-shaped arm 2b can maintain good elasticity to ensure good contact after the contact end 2a is compressed by force; by designing the width of the arc-shaped arm 2b to gradually decrease from the holding portion 21 to the contact end 2a, and the width of the bent arm 2d to gradually increase from the contact end 2a to the bending end, after the contact end 2a is compressed by force, it further maintains good elasticity to ensure good contact, and when the contact end 2a is subjected to force, the arc-shaped arm 2b and the bent arm 2d will be deformed, and the gradual change in the size of the arc-shaped arm 2b and the bent arm 2d can evenly absorb the stress. force, reduce fatigue and improve elasticity; by designing the material strip connecting part 2c at the lower end of the retaining part 21, the assembly direction is from bottom to top, which prevents the metal terminal 2 from withdrawing after the connector is locked on the circuit board; by providing a material-digging structure 113 on the dividing strip and on the non-fixed dividing strip 112 on both sides of the fixed dividing strip 111, the insulation body 1 can be effectively prevented from warping; the positioning column 11 is adopted to facilitate the alignment installation of the insulation body 1 and improve the installation efficiency; the screw fixing hole 15 is adopted to directly install and connect with the screw 5 to improve the installation efficiency; the contact end 2a of the metal terminal 2 is contacted and connected with the chip module 100 and the circuit board 200 by crimping contact, and the metal terminal 2 does not need to be welded, which can reduce the abnormal circuit breaking caused by poor welding of high-density welding points.

[0034] In other embodiments, the hollowing structure 113 on the non-fixed dividing strips 112 on both sides of the fixed dividing strip 111 is a long through hole that passes through the top and bottom surfaces of the insulating body 1. The number of long through holes on the non-fixed dividing strip 112 on each side of the fixed dividing strip 111 is one, and the two ends of each long through hole are respectively connected to the fixed dividing strip 111 and the fixed end 14.

[0035] In other embodiments, the excavation structure 113 on the non-fixed dividing strips 112 on both sides of the fixed dividing strip 111 is a long through hole that passes through the top and bottom surfaces of the insulating body 1. The number of long through holes on the non-fixed dividing strip 112 on each side of the fixed dividing strip 111 is two, and the two long through holes on the non-fixed dividing strip 112 on each side are parallel, and the two ends of each long through hole are respectively connected to the fixed dividing strip 111 and the fixed end 14.

[0036] In other embodiments, the material-cutting structure 113 on the non-fixed dividing strip 112 on each side of the fixed dividing strip 111 is composed of a plurality of square holes, which are arranged in two rows, and the arrangement direction of the square holes is perpendicular to the fixed dividing strip 111 .

[0037] In other embodiments, the hollowing structure 113 is a blind hole that does not penetrate the top and bottom surfaces of the insulating body 1 .

[0038] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A double-sided contact connector, comprising a flat-plate-shaped insulating body, wherein the contact area of ​​the insulating body has densely distributed receiving grooves penetrating the top and bottom surfaces of the insulating body, wherein each receiving groove holds a metal terminal, wherein the metal terminal comprises a holding portion and an upper arm extending upwardly and then bending downwardly from the upper end of the holding portion, and a lower arm extending downwardly and then bending upwardly from the lower end of the holding portion, wherein the upper inclined end of the upper arm and the lower inclined end of the lower arm are contact ends respectively pressed with a chip module and a circuit board, wherein the bent end of the upper arm and the bent end of the lower arm are in contact with each other when the contact ends of the upper arm and the lower arm are respectively pressed with the chip module and the circuit board, wherein: The inclined extension part of the metal terminal that first extends upwardly from the retaining part and that first extends downwardly from the retaining part are both arc-shaped arms.

2. The double-sided contact connector according to claim 1, characterized in that: The lower end of the holding portion is provided with material strip connecting portions on both sides of the position connected to the lower arm.

3. The double-sided contact connector according to claim 1 or 2, characterized in that: The width of the arc-shaped arm gradually decreases from the retaining portion to the contact end.

4. The double-sided contact connector according to claim 3, characterized in that: The bent and extended parts of the upper arm that bends downward and the lower arm that bends upward are both bent arms, and the width of the bent arms gradually increases from the contact end to the bent end, and the width of the bent end of the bent arm is smaller than the width of the arc-shaped arm near the retaining portion.

5. The double-sided contact connector according to claim 1, characterized in that: The insulating body is in the shape of a rectangular flat plate, with a cross dividing zone in the middle of the insulating body, the contact area of ​​the insulating body is distributed in four areas of the cross dividing zone, and a material-cutting structure is provided on the dividing zone in the length direction of the cross dividing zone of the insulating body.

6. The double-sided contact connector according to claim 5, characterized in that: Both ends of the insulating body in the length direction are fixed ends, the dividing strip of the cross dividing strip parallel to the two fixed ends is a fixed dividing strip, and the dividing strip of the cross dividing strip perpendicular to the two fixed ends is a non-fixed dividing strip. The excavation structure on the non-fixed dividing strip on both sides of the fixed dividing strip is a hole, and the number of holes on the non-fixed dividing strip on each side of the fixed dividing strip is at least one, and the hole is a through hole that passes through the top and bottom surfaces of the insulating body, or a blind hole that does not pass through the top and bottom surfaces of the insulating body.

7. The double-sided contact connector according to claim 6, characterized in that: The holes on the non-fixed dividing strip on each side of the fixed dividing strip are composed of a plurality of square holes, which are arranged in at least one row, and the arrangement direction of the square holes is perpendicular to the fixed dividing strip.

8. The double-sided contact connector according to claim 6 or 7, characterized in that: Each of the fixed ends and the fixed dividing strips is respectively provided with at least one screw fixing hole, and the screw fixing holes on the two fixed ends and the fixed dividing strips are arranged on the same straight line.

9. The double-sided contact connector according to claim 6 or 7, characterized in that: A positioning column is respectively arranged on each of the fixed ends and the fixed dividing strip, and the positioning column on the fixed dividing strip is offset from the positioning columns on the two fixed ends.

10. The double-sided contact connector according to claim 9, characterized in that: The positioning posts on the two fixed ends are located on the same side of the non-fixed dividing strip, and the positioning posts on the fixed dividing strip are located on the other side of the non-fixed dividing strip. The top and bottom surfaces of the insulating body are both provided with the positioning posts, and each positioning post on the top surface of the insulating body corresponds to each positioning post on the bottom surface of the insulating body.

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