Single-sided compression contact connector

Abstract

A plurality of conductive terminals are accommodated in terminal accommodating grooves in an insulating body in a one-to-one correspondence manner, and each conductive terminal comprises a holding part which can be fixedly connected with the side wall of the Ruan accommodating groove, an elastic contact arm and a welding part which are fixedly arranged on the holding part, and a simply supported elastic arm which is fixedly arranged on the welding part, the elastic contact arm capable of elastically deforming under pressure is provided with a contact point, the contact point extends out of the outer side of the upper end of the insulating body and is used for elastically contacting a PAD on the lower side face of a chip module, the welding part protrudes out of the outer side of the lower end of the insulating body, and a welding plane on the lower side of the welding part can be flatly attached to the PAD of a circuit board for welding connection. When the conductive terminal is used for connecting a chip module and a circuit board, double-channel signal transmission is formed, the conductive terminal is connected with the circuit board in a welding mode, the gold plating process of the circuit board is avoided, and the production cost of the circuit board is reduced.

Description

Technical Field

[0001] The present invention relates to a connector, in particular to a single-sided compression contact connector. Background Art

[0002] The chip module 20 and the circuit board 30 are electrically connected through the flat connector 10. The conductive terminals of the connector are of a crimping structure, and the terminals form upper elastic contact points 101 and lower elastic contact points 102 extending outward from the upper and lower sides of the insulating body. When the connector is clamped between the chip module and the circuit board, the upper elastic contact points 101 and the lower elastic contact points 102 of the terminals in the connector are in close contact with the chip module and the PAD on the circuit board respectively to achieve conduction. At the same time, when the conductive terminals are crimped into contact, dual-channel signal transmission is formed, thereby improving the high-frequency performance of the module.

[0003] The existing connector's top-and-bottom press-fit structure requires costly chemical gold plating for both the chip module and the contact pads on the circuit board. This is especially true for circuit boards, as the entire board needs to be plated with gold due to the gold treatment required for the press-fit module. This high cost significantly hinders the widespread adoption of press-fit module products. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides a single-sided compression contact connector, which can avoid gold plating of the circuit board PAD and reduce the cost of the circuit board.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a single-sided compression contact connector, including an insulating body and a conductive terminal, a plurality of terminal accommodating grooves are arranged at intervals on the flat insulating body, and each conductive terminal can be accommodated in the terminal accommodating groove in a one-to-one correspondence, the conductive terminal includes a holding portion, an elastic contact arm, a welding portion and a simply supported elastic arm, the holding portion of the conductive terminal can be fixedly connected to a side wall of the terminal accommodating groove, one end of the elastic contact arm is fixedly arranged on the holding portion, the elastic contact arm can be elastically deformed under pressure, and the elastic contact arm is provided with The contact point extends outward from the upper end of the insulating body, and the contact point can elastically contact the PAD on the lower side of the chip module covering the upper side of the insulating body, thereby realizing conduction between the conductive terminal and the PAD of the chip module. The welding portion is fixedly arranged on the holding portion, and the welding portion protrudes outward from the lower end of the insulating body. The welding plane on the lower side of the welding portion can be flatly attached to the PAD of the circuit board for welding connection. One end of the simply supported elastic arm is fixedly arranged on the side wall of the welding portion, and the elastic contact arm is compressed and deformed so that its other end can maintain elastic contact with the other end of the simply supported elastic arm.

[0006] As a further improvement of the present invention, the retaining portion, the elastic contact arm, the welding portion and the simply supported elastic arm of the conductive terminal are an integrally formed structure formed by stamping and bending a metal sheet.

[0007] As a further improvement of the present invention, the welding portion of the conductive terminal is a bent U-shaped structure, and the two side walls of the U-shaped structure are respectively connected to the holding portion and one end of the simply supported elastic arm. The bottom surface of the U-shaped structure forms a welding plane, and the gap formed between the convex arc surface formed between the bottom surface of the U-shaped structure and the two side walls and the PAD of the circuit board is a solder paste accommodating space during welding.

[0008] As a further improvement of the present invention, the elastic contact arm first extends upward for a distance from one end to the other end to form an elastic cantilever section, and then bends downward to form a closed-loop contact section. The elastic cantilever section and the closed-loop contact section are transitionally connected through an upper convex arc section to form a V-shaped structure or a U-shaped structure, and the upper convex surface of the arc of the upper convex arc section of the elastic contact arm forms a contact point.

[0009] As a further improvement of the present invention, the end of the closed-loop contact section of the elastic contact arm forms an upwardly inclined bent edge, and the arc downward convex surface formed between the bent edge and the closed-loop contact section is in close contact with the side wall of the other end of the simply supported elastic arm.

[0010] As a further improvement of the present invention, the simply supported elastic arm extends obliquely from bottom to top to form an elastic cantilever structure, and the arc downward convex surface at the other end of the elastic contact arm is tightly against the side wall surface of the upper end of the simply supported elastic arm.

[0011] As a further improvement of the present invention, the upper end of the simply supported elastic arm forms a contact inclined surface with a gentle slope, and the arc downward convex surface formed at the other end of the elastic contact arm is tightly against the contact inclined surface of the simply supported elastic arm.

[0012] As a further improvement of the present invention, the upper end of the simply supported elastic arm is bent to form a contact plane parallel to the welding plane, and the arc downward convex surface formed at the other end of the elastic contact arm is tightly against the contact plane of the simply supported elastic arm.

[0013] As a further improvement of the present invention, the upward convex arc section between the elastic cantilever section and the closed-loop contact section is a round-bottom V-shaped structure with an opening facing downward, and at least one open seam is formed in the middle of the round-bottom V-shaped structure.

[0014] As a further improvement of the present invention, the upper half of one end of the terminal accommodating groove forms a retaining slot with increased width, and the retaining portion of the conductive terminal is a vertical flat plate structure with a width greater than that of the elastic contact arm, the welding portion and the simply supported elastic arm. Interference protrusions are respectively formed on the two side walls of the retaining portion along the width direction. The retaining portion of the conductive terminal is tightly inserted into the retaining slot, and the interference protrusions on its two side walls are embedded and positioned with the inner side walls of the retaining slot. The lower end of the retaining portion of the conductive terminal is stopped on the lower end surface of the retaining slot to limit the insertion depth.

[0015] The beneficial technical effect of the present invention is: the present invention forms an elastic contact arm and a welding part on the retaining part of the conductive terminal, and extends a simply supported elastic arm on the welding part, and contacts and conducts with the PAD of the chip module by crimping through the elastic contact arm, and flatly welds the welding plane of the welding part to the PAD on the circuit board, so that the surface of the PAD on the circuit board does not need to be gold-plated, thereby avoiding the overall gold plating of the circuit board and reducing the cost of circuit board production. At the same time, after the chip module is pressed onto the connector, the elastic contact arm of the connector maintains close contact and conduction with the simply supported elastic arm, so that the conductive terminal forms a closed loop, that is, dual-channel signal transmission is formed, and the high-frequency performance of the module is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of the electrical connection state of the chip module, connector and circuit board;

[0017] Figure 2 This is a three-dimensional exploded view of the chip module, connector and circuit board in the traditional structure;

[0018] Figure 3 It is a three-dimensional diagram of the chip module;

[0019] Figure 4 A three-dimensional diagram of the entire circuit board;

[0020] Figure 5 It is a stereogram of a traditional connector;

[0021] Figure 6 This is a three-dimensional exploded view of a traditional connector;

[0022] Figure 7 This is the main view of the chip module and circuit board before crimping the traditional connector;

[0023] Figure 8 Main view of the traditional connector state for chip module and circuit board contact;

[0024] Figure 9 The main view of the chip module and circuit board after crimping the traditional connector;

[0025] Figure 10 A first perspective view of a conductive terminal of a conventional connector;

[0026] Figure 11 A second perspective view of a conductive terminal of a conventional connector;

[0027] Figure 12 This is a front view of the conductive terminal of a traditional connector;

[0028] Figure 13 This is a front view of the conductive terminals of a traditional connector being crimped by the PAD of a chip module and a circuit board;

[0029] Figure 14 This is the main view of the conductive terminals of a traditional connector after being crimped by the chip module and the PAD of the circuit board;

[0030] Figure 15 This is a three-dimensional exploded view of the chip module and the circuit board being electrically connected using the connector of the present invention;

[0031] Figure 16 This is a perspective view of a first connector of the present invention;

[0032] Figure 17 This is a perspective exploded view of the first connector of the present invention;

[0033] Figure 18 A front view of the chip module and the circuit board before being crimped onto the first connector of the present invention;

[0034] Figure 19 A front view of the first connector state of the present invention in which the chip module and the circuit board are in contact;

[0035] Figure 20 This is a front view of the chip module and the circuit board after being crimped to the first connector of the present invention;

[0036] Figure 21 A first stereoscopic view of the conductive terminal of the first connector of the present invention;

[0037] Figure 22 A second perspective view of the conductive terminal of the first connector of the present invention;

[0038] Figure 23 This is a front view of the conductive terminal of the first connector of the present invention;

[0039] Figure 24 This is a front view of the conductive terminals of the first connector of the present invention being crimped by the chip module and the PAD of the circuit board;

[0040] Figure 25 This is a front view of the conductive terminals of the first connector of the present invention after being crimped by the chip module and the PAD of the circuit board;

[0041] Figure 26 A perspective view of a second connector according to the present invention;

[0042] Figure 27 This is a perspective exploded view of a second connector of the present invention;

[0043] Figure 28 for Figure 27 Enlarged view of part A in the middle;

[0044] Figure 29 A front view of the chip module and the circuit board before being crimped onto the second connector of the present invention;

[0045] Figure 30 A front view of the second connector state of the present invention in which the chip module and the circuit board are in contact;

[0046] Figure 31 This is a front view of the chip module and the circuit board after being crimped to the second connector of the present invention;

[0047] Figure 32 A first stereoscopic view of a conductive terminal of a second connector of the present invention;

[0048] Figure 33 is a second perspective view of the conductive terminal of the second connector of the present invention;

[0049] Figure 34 This is a front view of the conductive terminal of the second connector of the present invention;

[0050] Figure 35 This is a front view of the conductive terminals of the second connector of the present invention being crimped by the chip module and the PAD of the circuit board;

[0051] Figure 36 This is a front view of the conductive terminals of the second connector of the present invention after being crimped by the chip module and the PAD of the circuit board. DETAILED DESCRIPTION

[0052] Embodiment: A single-sided compression contact connector includes an insulating body 1 and a conductive terminal 2. The flat insulating body 1 is provided with a plurality of terminal receiving grooves 11 arranged at intervals. Each conductive terminal 2 can be accommodated in the terminal receiving groove 11 in a one-to-one correspondence. The conductive terminal 2 includes a retaining portion 21, an elastic contact arm 22, a welding portion 23 and a simply supported elastic arm 24. The retaining portion 21 of the conductive terminal 2 can be fixedly connected to a side wall of the terminal receiving groove 11. One end of the elastic contact arm 22 is fixedly provided on the retaining portion 21. The elastic contact arm 22 can be elastically deformed under pressure. A contact point 221 is provided on the elastic contact arm 22. The contact point 2 21 extends outward from the upper end of the insulating body 1, and the contact point 221 can elastically contact the PAD on the lower side of the chip module 20 covering the upper side of the insulating body 1, thereby realizing the conduction between the conductive terminal 2 and the PAD of the chip module 20, and the welding portion 23 is fixedly provided on the retaining portion 21, and the welding portion 23 protrudes outward from the lower end of the insulating body 1. The welding plane 231 on the lower side of the welding portion 23 can be flatly attached to the PAD of the circuit board 30 for welding connection, and one end of the simply supported elastic arm 24 is fixedly provided on the side wall of the welding portion 23, and the elastic contact arm 22 is compressed and deformed so that the other end thereof can maintain elastic contact with the other end of the simply supported elastic arm 24.

[0053] The conductive terminal 2 of the connector is designed to extend outward from the elastic upper end of the insulating body 1 through the elastic contact arm 22 to form a crimped conductive structure. At the same time, the welding portion 23 protrudes outward from the lower end of the insulating body 1 to form a welding conduction, so that the connector can be welded on the PAD of the circuit board 30, so that the PAD of the circuit board 30 can achieve the conductive connection function with the connector without gold plating, thereby avoiding gold plating on the front side of the circuit board 30, greatly reducing the manufacturing process of the circuit board 30, and the conductive terminal 2 of the connector is also provided with a simply supported elastic arm 24 extending from the welding portion 23. When the elastic contact arm 22 is subjected to the downward pressure of the chip module 20, the contact point 2 on the elastic contact arm 22 21 maintains close contact and conduction with the PAD on the chip module 20, and at the same time, the other end of the elastic contact arm 22 maintains close contact and conduction with the simply supported elastic arm 24, thereby enabling the conductive terminal 2 of the connector to form a dual-channel signal transmission (one path of the electrical signal goes along the PAD of the chip module 20, one section of the elastic contact arm 22 of the conductive terminal 2, the retaining portion 21 of the conductive terminal 2, the welding portion 23 of the conductive terminal 2 to the PAD of the circuit board 30; the other path of the electrical signal goes along the PAD of the chip module 20, the other section of the elastic contact arm 22 of the conductive terminal 2, the simply supported elastic arm 24 of the conductive terminal 2, the welding portion 23 of the conductive terminal 2 to the PAD of the circuit board 30), thereby achieving the high-frequency performance of the module.

[0054] The retaining portion 21, elastic contact arm 22, welding portion 23, and simply supported elastic arm 24 of the conductive terminal 2 are integrally formed from sheet metal by stamping and bending. This integrated stamping and bending process simplifies the overall manufacturing process, reduces manufacturing costs, and provides a high-strength integrated structure. The elastic contact arm 22 and simply supported elastic arm 24 exhibit excellent elasticity and are less susceptible to plastic deformation or breakage under pressure.

[0055] The soldering portion 23 of the conductive terminal 2 is a bent U-shaped structure, the two side walls of which are respectively connected to the retaining portion 21 and one end of the simply supported elastic arm 24, the bottom surface of which forms a soldering plane 231, and the gap formed between the convex arc surface formed between the bottom surface and the two side walls of the U-shaped structure and the PAD of the circuit board 30 is a space for accommodating the solder paste 40 during soldering. The soldering portion 23 of the conductive terminal 2 adopts a U-shaped structure, the two side walls of which can be connected to the retaining portion 21 and the simply supported elastic arm 24, the bottom surface of which forms a soldering plane 231 flat against the surface of the PAD of the circuit board 30, the gap formed between the rounded corners between the side walls and the bottom surface and the upper side surface of the PAD can accommodate the solder paste 40, ensuring a firm soldering. In addition, the soldering portion 23 of the conductive terminal 2 can also be a flat plate structure formed by tearing. This is an equivalent replacement structure that can be easily thought of by metal workers in this field based on this application and falls within the scope of protection of this application.

[0056] The elastic contact arm 22 first extends upward from one end to the other end for a distance to form an elastic cantilever section 222, and then bends downward to form a closed-loop contact section 223. The elastic cantilever section 222 and the closed-loop contact section 223 are transitionally connected by an upward convex arc section 224 to form a V-shaped structure or a U-shaped structure. The convex surface of the arc of the upward convex arc section 224 of the elastic contact arm 22 forms a contact point 221. The elastic contact arm 22 is bent multiple times, and its elastic cantilever section 222 serves as a supporting section that is elastically deformed under pressure. It is bent downward to form a closed-loop contact section 223, which is used to contact the simply supported elastic arm 24 to form a closed-loop structure. The upper convex arc section 224 between the elastic cantilever section 222 and the closed-loop contact section 223 protrudes from the outer side of the upper end of the insulating body 1, and the convex surface of the contact arc at the top is used to contact the PAD of the chip module 20. During the downward pressing process of the PAD of the chip module 20, the convex surface of the arc of the conductive terminal 2 and the PAD are in relative sliding contact through the arc surface, which can avoid damaging the PAD surface of the chip module 20.

[0057] The end of the closed-loop contact section 223 of the elastic contact arm 22 forms an upwardly inclined bent edge 225. The arc-shaped downwardly convex surface formed between the bent edge 225 and the closed-loop contact section 223 closely contacts the sidewall of the other end of the simply supported elastic arm 24. The curved end of the closed-loop contact section 223 of the elastic contact arm 22 forms an arcuate contact surface, preventing scratches on the sidewall of the simply supported elastic arm 24 or preventing the two from becoming stuck and unable to slide relative to each other.

[0058] The simply supported elastic arm 24 extends upward at an angle from bottom to top, forming a resilient cantilever structure. The arc-shaped downwardly convex surface at the other end of the resilient contact arm 22 abuts against the upper sidewall surface of the simply supported elastic arm 24. By extending upward at an angle, the simply supported elastic arm 24 and the resilient contact arm 22 contact position are away from the soldering area, effectively preventing solder creep from affecting contact.

[0059] The upper end of the simply supported elastic arm 24 forms a contact inclined surface 241 with a gentle slope, and the other end of the elastic contact arm 22 forms a circular arc downward convex surface that is tightly against the contact inclined surface 241 of the simply supported elastic arm 24 .

[0060] The upper end of the simply supported elastic arm 24 is bent to form a contact plane 242 parallel to the welding plane 231. The arc-shaped downwardly convex surface formed at the other end of the elastic contact arm 22 abuts against the contact plane 242 of the simply supported elastic arm 24. The contact plane 242 preferably extends toward the interior of the closed loop formed by the conductive terminal 2 to reduce the overall size of the conductive terminal 2.

[0061] The upward convex arc segment 224 between the elastic cantilever segment 222 and the closed-loop contact segment 223 is a downward-facing, round-bottomed V-shaped structure with at least one open slot 2241 formed in the center. The downward-facing V-shaped structure of the upward convex arc segment 224 has its highest point in contact with the PAD of the chip module 20, ensuring stable contact.

[0062] The upper half of one end of the terminal accommodating groove 11 forms a retaining slot 111 with an increased width. The retaining portion 21 of the conductive terminal 2 is a vertical flat plate structure with a width greater than that of the elastic contact arm 22, the welding portion 23 and the simply supported elastic arm 24. Interference protrusions 211 are respectively formed on the two side walls of the retaining portion 21 along the width direction. The retaining portion 21 of the conductive terminal 2 is tightly inserted into the retaining slot 111, and the interference protrusions 211 on its two side walls are embedded and positioned with the inner side walls of the retaining slot 111. The lower end of the retaining portion 21 of the conductive terminal 2 is stopped on the lower end surface of the retaining slot 111 to limit the insertion depth. During assembly, the conductive terminal 2 is inserted into the terminal accommodating groove 11 from top to bottom, and the retaining portion 21 of the conductive terminal 2 is tightly inserted into the retaining slot 111. The interference protrusions 211 on both sides interfere with the side walls of the retaining slot 111 of the insulating body 1 to achieve stop positioning. The interference protrusions 211 on both sides of the retaining portion 21 of the conductive terminal 2 can be one or more, and the interference protrusions 211 are preferably barbed structures to prevent falling off. The insertion depth of the conductive terminal 2 is limited by the contact between the lower end surface of the retaining portion 21 and the lower end surface of the retaining slot 111, ensuring that the welding portion 23 protrudes from the lower end height of the insulating body 1 and the contact point 221 on the elastic contact arm 22 extends out of the upper end distance of the insulating body 1.

Claims

1. A single-sided compression contact connector, comprising an insulating body (1) and conductive terminals (2), wherein a plurality of terminal receiving grooves (11) are arranged at intervals on the flat insulating body, and each conductive terminal can be received in the terminal receiving groove in a one-to-one correspondence, characterized in that: The conductive terminal comprises a holding portion (21), an elastic contact arm (22), a welding portion (23) and a simply supported elastic arm (24); the holding portion of the conductive terminal can be fixedly connected to a side wall of the terminal accommodating groove; one end of the elastic contact arm is fixedly arranged on the holding portion; the elastic contact arm can be elastically deformed when under pressure; a contact point (221) is provided on the elastic contact arm; the contact point extends outside the upper end of the insulating body; the contact point can elastically contact the PAD on the lower side of the chip module (20) covering the upper side of the insulating body, thereby achieving conduction between the conductive terminal and the PAD of the chip module; the welding portion is fixedly arranged on the holding portion; the welding portion protrudes outside the lower end of the insulating body; the welding plane (231) on the lower side of the welding portion can be flatly attached to the PAD of the circuit board (30) for welding connection; one end of the simply supported elastic arm is fixedly arranged on the side wall of the welding portion; the elastic contact arm can be deformed under pressure so that its other end can maintain elastic contact with the other end of the simply supported elastic arm.

2. The single-sided compression contact connector according to claim 1, wherein: The holding portion, the elastic contact arm, the welding portion and the simply supported elastic arm of the conductive terminal are an integrally formed structure formed by stamping and bending a metal sheet.

3. The single-sided compression contact connector according to claim 1, wherein: The welding portion of the conductive terminal is a bent U-shaped structure, the two side walls of the U-shaped structure are respectively connected to the holding portion and one end of the simply supported elastic arm, the bottom surface of the U-shaped structure forms a welding plane, and the gap formed between the convex arc surface formed between the bottom surface of the U-shaped structure and the two side walls and the PAD of the circuit board is a space for accommodating solder paste (40) during welding.

4. The single-sided compression contact connector according to claim 1, wherein: The elastic contact arm first extends upwards for a distance from one end to the other end to form an elastic cantilever section (222), and then bends downward to form a closed-loop contact section (223). The elastic cantilever section and the closed-loop contact section are transitionally connected through an upward convex arc section (224) to form a V-shaped structure or a U-shaped structure, and the upward convex surface of the arc of the upward convex arc section of the elastic contact arm forms a contact point.

5. The single-sided compression contact connector according to claim 4, wherein: The end of the closed-loop contact section of the elastic contact arm forms a bent edge (225) inclined upward, and the arc downward convex surface formed between the bent edge and the closed-loop contact section is in close contact with the side wall of the other end of the simply supported elastic arm.

6. The single-sided compression contact connector according to claim 5, wherein: The simply supported elastic arm extends obliquely from bottom to top to form an elastic cantilever structure, and the arc downward convex surface at the other end of the elastic contact arm is tightly against the side wall surface of the upper end of the simply supported elastic arm.

7. The single-sided compression contact connector according to claim 6, wherein: The upper end of the simply supported elastic arm forms a contact inclined surface (241) with a gentle slope, and the other end of the elastic contact arm forms a circular arc downward convex surface that is tightly against the contact inclined surface of the simply supported elastic arm.

8. The single-sided compression contact connector according to claim 6, wherein: The upper end of the simply supported elastic arm is bent to form a contact plane (242) parallel to the welding plane, and the arc downward convex surface formed at the other end of the elastic contact arm is tightly against the contact plane of the simply supported elastic arm.

9. The single-sided compression contact connector according to claim 4, wherein: The upward convex arc section between the elastic cantilever section and the closed-loop contact section is a V-shaped structure with a round bottom opening facing downward, and at least one open seam (2241) is formed in the middle of the V-shaped structure.

10. The single-sided compression contact connector according to claim 1, wherein: The upper half of one end of the terminal accommodating groove forms a retaining slot (111) with an increased width. The retaining portion of the conductive terminal is a vertical flat plate structure with a width greater than that of the elastic contact arm, the welding portion and the simply supported elastic arm. Interference protrusions (211) are respectively formed on the two side walls of the retaining portion along the width direction. The retaining portion of the conductive terminal is tightly inserted into the retaining slot, and the interference protrusions on the two side walls are embedded and positioned with the inner side walls of the retaining slot. The lower end of the retaining portion of the conductive terminal stops on the lower end surface of the retaining slot to achieve insertion depth limitation.

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