High-speed matrix electrical connector

Abstract

The utility model provides a high-speed matrix electric connector which comprises a body, the body is provided with a plurality of terminal holes which penetrate through the upper surface and the lower surface of the body and are arranged in a matrix, and a terminal is accommodated in each terminal hole. Each terminal comprises a fixed part fixed in the terminal hole, a matching part formed by bending from one side of the fixed part, an elastic contact part which extends upwards from the fixed part and protrudes out of the upper surface of the body, an extension part which extends downwards from the fixed part and a bending part formed by bending from one side of the extension part, and the bending part and the matching part are positioned on the same side of the fixed part; the other opposite side of the extension part is a linear side; the high-speed matrix electric connector can effectively solve the problem that the internal stress of the body is difficult to control.

Description

Technical Field

[0001] The utility model belongs to the field of connectors, and in particular relates to a high-speed matrix electric connector. Background Art

[0002] LGA CPU socket connectors feature a matrix arrangement of terminals, typically exceeding 1000 pins. To ensure optimal soldering, solder balls are implanted onto the connector pins to increase solder volume and improve soldering yield. Currently, the industry utilizes two methods: hot soldering and cold soldering. Hot soldering involves pre-soldering the solder balls onto the terminal pins, while cold soldering utilizes the terminal pins' inherent elasticity to hold the solder balls in place.

[0003] Chinese patent CN201810424146.7 discloses an electrical connector, which includes a body and multiple terminals accommodated in the body. Multiple limit blocks protrude from the lower surface of the insulating body, and two limit blocks are correspondingly provided around each receiving hole. The terminal includes a base, an elastic arm, a through groove, a mating portion, a connecting portion, a limit portion and a conductive portion. The conductive portion includes an extension portion, a stop portion and a bend portion. The bend portion is located on the left side of the extension portion, and the stop portion is located on the right side of the extension portion. The bend portion and the two limit blocks jointly clamp the solder. The conductive portion of the terminal is the terminal soldering foot, and the conductive portion of the terminal adopts a cold ball implantation mode. Since the conductive portion is punched out to form a bend on the right side of the extension portion, because of this additional bend, the dimensional tolerance of the interference between the terminal and the solder ball has an additional variation, which makes the force of clamping the ball vary greatly. When the number of terminals exceeds 1000 pins, or several thousand pins, the internal stress of the body of the electrical connector is difficult to control. Therefore, it is necessary to improve it. Summary of the Invention

[0004] The purpose of the present utility model is to provide a high-speed matrix electrical connector to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution used in this utility model is:

[0006] A high-speed matrix electrical connector includes a body having a plurality of terminal holes arranged in a matrix extending through the upper and lower surfaces of the body, each terminal hole housing a terminal, each terminal including a fixed portion fixed within the terminal hole, a mating portion bent from one side of the fixed portion, an elastic contact portion extending upward from the fixed portion and protruding from the upper surface of the body, an extension portion extending downward from the fixed portion, and a bent portion bent from one side of the extension portion, wherein the bent portion and the mating portion are located on the same side of the fixed portion, and the other opposite side of the extension portion is a straight side.

[0007] Furthermore, a through hole is provided at the bending portion between the fixing portion and the bending portion.

[0008] Furthermore, the bending angle between the fixing portion and the bending portion is an obtuse angle.

[0009] Furthermore, the upper end of the bending portion is connected to a material strip connecting portion.

[0010] Furthermore, the bent portion is convex outwardly away from the fixing portion to form a latching tooth.

[0011] Furthermore, the bent portion protrudes from the lower surface of the body, and an L-shaped boss is provided on the lower surface of the body next to each terminal hole. The L-shaped boss is arranged opposite to the bent portion and a solder ball clamping space is formed between the L-shaped boss and the bent portion.

[0012] Furthermore, the hole wall of the terminal hole is concave at the corresponding extension portion to form an avoidance groove, and the avoidance groove passes through the lower surface of the body.

[0013] Furthermore, the other opposite side of the fixing portion is convex to form a protrusion, and the straight side extends upward to below the protrusion.

[0014] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in:

[0015] (1) By setting the other opposite side of the extension as a straight side, the variation of the solder ball clamping force is reduced, effectively solving the problem of difficult to control the internal stress of the body.

[0016] (2) A solder ball clamping space is formed between the L-shaped boss and the bent portion, which can firmly fix the solder ball. When the high-temperature solder ball melts, the high-speed matrix electrical connector sinks as a whole, and the L-shaped boss contacts the circuit board, acting as a footing.

[0017] (3) By providing space for elastic deformation of the extension part when the solder ball is implanted in the clamping space, the avoidance groove can reduce the force instability caused by manufacturing tolerances, reduce product warping, and improve product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional exploded schematic diagram of the high-speed matrix electrical connector, electronic card and circuit board of the utility model;

[0019] Figure 2 A three-dimensional diagram of the terminal Figure 1 ;

[0020] Figure 3 A three-dimensional diagram of the terminal Figure 2 ;

[0021] Figure 4 As a representation of the body Figure 1 ;

[0022] Figure 5 As a representation of the body Figure 2 ;

[0023] Figure 6 It is a three-dimensional schematic diagram of a high-speed matrix electrical connector;

[0024] Figure 7 is a cross-sectional schematic diagram of a high-speed matrix electrical connector;

[0025] Figure 8 for Figure 7 A partial schematic diagram of .

[0026] Description of the accompanying drawings: body 1, terminal hole 11, avoidance groove 111, L-shaped boss 12, raised portion 13, terminal 2, fixing portion 21, mating portion 22, elastic contact portion 23, extension portion 24, bending portion 25, protrusion 26, through hole 27, strip connecting portion 28, latching tooth 29, clamping space a, solder ball 3, chip module 4, circuit board 5. DETAILED DESCRIPTION

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

[0028] like Figure 1-8 As shown, the high-speed matrix electrical connector is used to electrically connect a chip module 4 to a circuit board 5, which includes a body 1 for supporting the chip module 4 upward, and a plurality of terminals 2 (only some of the terminals are shown in the figure) accommodated in the body 1.

[0029] The main body 1 is provided with a plurality of terminal holes 11 arranged in a matrix, extending through the upper and lower surfaces of the main body 1. Each terminal hole 11 accommodates a terminal 2. An L-shaped boss 12 is provided on the lower surface of the main body 1, adjacent to each terminal hole 11. L-shaped boss 12 is formed by connecting two bosses at an obtuse angle. A raised portion 13 is also provided on the lower surface of the main body 1, adjacent to each terminal hole 11. The walls of each terminal hole 11 are recessed to form a relief groove 111, which extends through the lower surface of the main body 1.

[0030] Each terminal 2 includes a fixed portion 21 fixed in the terminal hole 11, a mating portion 22 formed by bending from one side of the fixed portion 21, an elastic contact portion 23 extending upward from the fixed portion 21 and protruding from the upper surface of the body 1, an extension portion 24 extending downward from the fixed portion 21, and a bent portion 25 formed by bending from one side of the extension portion 24. The contact point of the elastic contact portion 23 contacts the chip module 4. The bent portion 25 and the mating portion 22 are located on the same side of the fixed portion 21. The other opposite side of the fixed portion 21 protrudes outward to form a protrusion 26. The other opposite side of the extension portion 24 is a straight side, which extends upward to below the protrusion 26. A through hole 27 is formed at the bend between the fixed portion 21 and the bent portion 25. The bending angle between the fixed portion 21 and the bent portion 25 is an obtuse angle. The upper end of the bent portion 25 is connected to a strip connection portion 28. The bent portion 25 protrudes outward away from the fixed portion 21 to form a latching tooth 29. The latch teeth 29 and the protrusion 26 can firmly fix the terminal 2 in the terminal hole 11 .

[0031] The bent portion 25 protrudes from the lower surface of the body 1. The L-shaped boss 12 is positioned opposite the bent portion 25, forming a solder ball clamping space a between the L-shaped boss 12 and the bent portion 25 to securely clamp the solder ball 3 for soldering to the circuit board 5. This L-shaped boss 12 also serves as a footing. During high-temperature soldering, the solder ball 3 melts, causing the high-speed matrix electrical connector to sink downward, and the L-shaped boss 12 contacts the circuit board 5, acting as a footing. The avoidance groove 111 corresponds to the position of the extension portion 24. When the solder ball 3 is trapped in the clamping space a, the extension portion 24 undergoes elastic deformation. The avoidance groove 111 provides space for the extension portion 24 to deform elastically, thereby reducing force instability caused by manufacturing tolerances, reducing product warpage, and improving product yield.

[0032] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: by setting the other opposite side of the extension portion 24 as a straight side, the variation of the clamping force of the solder ball 3 is reduced, and the problem of difficult-to-control stress in the main body 1 is effectively solved; the solder ball clamping space a is formed between the L-shaped boss 12 and the bent portion 25, and the solder ball can be firmly fixed; when the high-temperature solder ball melts, the high-speed matrix electrical connector as a whole sinks downward, and the L-shaped boss 12 contacts the circuit board 5, acting as a foothold; through the avoidance groove 111, space is provided for the elastic deformation of the extension portion when the solder ball 3 is implanted in the clamping space a, which can reduce the force instability caused by manufacturing tolerances, reduce product warping, and improve product yield.

[0033] In other embodiments, the protrusion 26 may be removed, and the other opposite sides of the fixing portion 21 and the extending portion 24 are both straight lines from top to bottom.

[0034] 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 high-speed matrix electrical connector, comprising a body, the body being provided with a plurality of terminal holes arranged in a matrix extending through the upper and lower surfaces of the body, each terminal hole housing a terminal, each terminal comprising a fixed portion fixed within the terminal hole, a mating portion bent from one side of the fixed portion, an elastic contact portion extending upward from the fixed portion and protruding from the upper surface of the body, an extension portion extending downward from the fixed portion, and a bent portion bent from one side of the extension portion, wherein the bent portion and the mating portion are located on the same side of the fixed portion, characterized in that: The other opposite side of the extension portion is a straight side.

2. The high-speed matrix electrical connector according to claim 1, wherein: A through hole is provided at the bending portion between the fixing portion and the bending portion.

3. The high-speed matrix electrical connector according to claim 1, wherein: The bending angle between the fixing portion and the bending portion is an obtuse angle.

4. The high-speed matrix electrical connector according to claim 1, wherein: The upper end of the bending portion is connected to the material strip connecting portion.

5. The high-speed matrix electrical connector according to claim 1, wherein: The bent portion is convex away from the fixing portion to form a latching tooth.

6. The high-speed matrix electrical connector according to claim 1, wherein: The bent portion protrudes from the lower surface of the body, and an L-shaped boss is provided on the lower surface of the body beside each terminal hole. The L-shaped boss is arranged opposite to the bent portion and a solder ball clamping space is formed between the L-shaped boss and the bent portion.

7. The high-speed matrix electrical connector according to claim 1, wherein: The hole wall of the terminal hole is concave at the corresponding extension portion to form an avoidance groove, and the avoidance groove passes through the lower surface of the body.

8. The high-speed matrix electrical connector according to claim 1, wherein: The other opposite side of the fixing portion is convex outward to form a protrusion, and the straight side extends upward to below the protrusion.

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