Connector for circuit board and circuit board assembly

Abstract

The utility model discloses a connector for a circuit board and a circuit board assembly. According to the technical scheme, the wiring terminal comprises a terminal base and a wiring terminal body, the wiring terminal body is inserted into a terminal insertion cavity of the terminal base, a buckle extending out of the terminal base is integrally formed at the front end of the wiring terminal body in a punching mode, and the buckle comprises a first elastic clamping pin and a second elastic clamping pin which are oppositely arranged. The front end of the first elastic clamping foot and the front end of the second elastic clamping foot are provided with inwards-bent conical guiding faces for insertion, the rear end of the first elastic clamping foot and the rear end of the second elastic clamping foot are provided with a first clamping face and a second clamping face which are inwards bent, and a clamping groove in smooth transition is formed between the first clamping face and the second clamping face.

Description

Technical Field

[0001] The utility model belongs to the electronic field, and in particular relates to a connector. Background Art

[0002] A circuit board connector is a device that connects a wire to a printed circuit board (PCB) to achieve connection between circuits. The traditional circuit board connector structure includes: a terminal block, a wiring terminal and a wire. The wire is crimped on the wiring terminal, and the wiring terminal is plugged into the terminal plug-in cavity of the terminal block. The front end of the wiring terminal is usually provided with a rivet foot, a plug foot or a patch foot that is welded to the PCB board. The disadvantage is that after the wiring terminal is welded to the PCB, the pulling resistance is poor, and it is easy to cause cold welding of the wiring terminal and the wire. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a circuit board connector and a circuit board which have good strength and are not prone to cold soldering.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: a terminal seat and a wiring terminal, the wiring terminal is plugged into the terminal plug-in cavity of the terminal seat, and is characterized in that: the front end of the wiring terminal is integrally stamped with a buckle extending out of the terminal seat, the buckle includes a first elastic clamping foot and a second elastic clamping foot arranged relatively to each other, the front ends of the first elastic clamping foot and the second elastic clamping foot are provided with a conical guide surface for plug-in that is bent inwardly, the rear ends of the first elastic clamping foot and the second elastic clamping foot are provided with a first clamping surface and a second clamping surface that are bent inwardly, and a smoothly transitional clamping groove is formed between the first clamping surface and the second clamping surface.

[0005] The connector for a circuit board is characterized in that a "U"-shaped accommodating cavity for accommodating a copper wire is provided at the front end of the terminal block, and a conical accommodating cavity connected to the "U"-shaped accommodating cavity is formed between the two second clamping surfaces, and a tin groove is provided at the front end of the conical accommodating cavity.

[0006] The connector for a circuit board is characterized in that: the connection terminal is provided with small wire pins on both sides corresponding to the "U"-shaped accommodating cavity, and the connection terminal is provided with large wire pins on both sides of the rear end.

[0007] The connector for a circuit board is characterized in that: a retaining spring is integrally stamped and formed at the rear of the connection terminal corresponding to the "U"-shaped accommodating cavity, and a hanging platform connected to the retaining spring is provided in the terminal seat.

[0008] The connector for a circuit board is characterized in that: a guide groove cooperating with the guide of the anti-retraction spring piece is provided at the rear end of the hanging platform, and an unlocking groove communicating with the anti-retraction spring piece is provided at the front of the hanging platform.

[0009] The connector for a circuit board is characterized in that: the connection terminal is provided with positioning feet on both sides corresponding to the retaining spring, and the plug-in cavity of the terminal seat is provided with a positioning step that cooperates with the positioning feet.

[0010] The connector for a circuit board is characterized in that a fool-proof protrusion and an anti-stress groove are provided on the side of the terminal seat.

[0011] The circuit board connector is characterized in that a chamfer is provided at the front end of the connection terminal corresponding to the middle position of the clamping groove.

[0012] The circuit board connector is characterized in that a reinforcing rib is integrally stamped on the retaining spring.

[0013] A circuit board assembly comprises a circuit board body, wherein the circuit board body is provided with a wiring hole, and is characterized in that the circuit board body is provided with any of the above-mentioned circuit board connectors through the wiring hole.

[0014] The circuit board connector and the circuit board of the utility model have the following advantages: by arranging a buckle capable of clamping the wiring hole of the PCB board at the front end of the wiring terminal, the strength is good after welding and cold welding is not easy.

[0015] The utility model is further described below in conjunction with the accompanying drawings of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the connector for circuit board of the utility model;

[0017] Figure 2 It is a cross-sectional view of the connector for a circuit board of the utility model;

[0018] Figure 3 It is a front structural schematic diagram of the utility model wiring terminal;

[0019] Figure 4 It is a schematic diagram of the back structure of the wiring terminal of the utility model;

[0020] Figure 5 This is a schematic diagram of the installation of the wire and the wiring terminal of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the circuit board assembly of the utility model. DETAILED DESCRIPTION Embodiment 1:

[0022] Reference Figure 1-5As shown, the circuit board connector of the utility model comprises a terminal block 1 and a wiring terminal 2, and the wiring terminal 2 is plugged into the terminal plug-in cavity 3 of the terminal block 1. The front end of the wiring terminal 2 is integrally stamped with a buckle 4 extending out of the terminal block 1. The buckle 4 comprises a first elastic clamping foot 5 and a second elastic clamping foot 6 arranged opposite to each other, and the front ends of the first elastic clamping foot 5 and the second elastic clamping foot 6 are provided with an inwardly bent plug-in conical guide surface 7. Through the two inwardly bent plug-in conical guide surfaces 7, a sharper conical structure is formed at the top of the wiring terminal 2, so that it is easier to insert into the wiring hole of the PCB board. The first elastic clamping foot 5 and the second elastic clamping foot 6 are provided with an inwardly bent first clamping surface 8 and a second clamping surface 9 at the rear ends, and a smoothly transitioned clamping groove 10 is formed between the first clamping surface 8 and the second clamping surface 9. When the buckle 4 of the terminal block 1 is inserted into the wiring hole of the PCB board, the inner wall of the wiring hole is clamped in the clamping groove 10 formed between the first clamping surface 8 and the second clamping surface 9.

[0023] Preferably, the front end of the wiring terminal 2 is provided with a "U"-shaped accommodating cavity 12 for accommodating the copper wire 11, and a conical accommodating cavity 13 connected to the "U"-shaped accommodating cavity 12 is formed between the two second clamping surfaces 9, and a tin groove 14 is provided at the front end of the conical accommodating cavity 13. When wiring, the front end of the copper wire 11 is placed in the "U"-shaped accommodating cavity 12 and the conical accommodating cavity 13. When welding, the liquefied solder will enter the conical accommodating cavity 13 through the tin groove 14 and can wrap the copper wire 11. This can further improve the welding strength and prevent cold soldering.

[0024] Preferably, the wiring terminal 2 is provided with small package pins 15 on both sides corresponding to the "U"-shaped accommodating cavity 12, and large package pins 16 are provided on both sides of the rear end of the wiring terminal 2. When the copper wire 11 is loaded into the wiring terminal 2, the small package pin 15 is wrapped around the copper wire 11, and the large package pin 16 is wrapped around the insulating layer 29 outside the copper wire 11 by a wiring device. This realizes the wiring and fixation between the wire and the wiring terminal 2.

[0025] Preferably, the terminal block 2 is integrally stamped with a retaining spring 28 at the rear of the "U"-shaped accommodating cavity 12, and a hanging platform 17 connected to the retaining spring 28 is provided in the terminal block 1 to prevent the terminal block 2 from falling off from the terminal block 1.

[0026] Preferably, the rear end of the hanging platform 17 is provided with a guide groove 18 for guiding and cooperating with the anti-retraction spring piece 28, and the anti-retraction spring piece 28 can be guided by the guide groove 18 to be more smoothly hung on the hanging platform 17 and locked. The front of the hanging platform 17 is provided with an unlocking groove 19 connected with the anti-retraction spring piece 28. By inserting a rod-shaped object such as a screwdriver into the unlocking groove 19, the anti-retraction spring piece 28 can be separated from the hanging platform 17 to achieve unlocking.

[0027] Preferably, the wiring terminal 2 is provided with positioning feet 20 on both sides corresponding to the stop spring 28, and the plug-in cavity 3 of the terminal block 1 is provided with a positioning step 27 that is positioned and matched with the positioning feet 20. The positioning foot 20 is positioned and matched with the positioning step 27 to prevent the wiring terminal 2 from spinning in the plug-in cavity 3 of the terminal block 1, thereby improving the stability of the connection.

[0028] Preferably, the side of the terminal block 1 is provided with an anti-fool protrusion 21 and an anti-stress groove 22. The anti-fool protrusion 21 is used to prevent the terminal block 1 from being installed in the reverse direction, and the anti-stress groove 22 is used to prevent the terminal block 1 from being deformed due to internal stress after injection molding.

[0029] Preferably, a chamfer 23 is provided at the front end of the connection terminal 2 corresponding to the middle position of the clamping groove 10. The chamfer 23 enables the connection terminal 2 to be inserted into the connection hole of the PCB board more smoothly.

[0030] Preferably, a reinforcing rib 24 is integrally stamped on the anti-retraction spring piece 28 to improve the strength of the anti-retraction spring piece 28. Embodiment 2:

[0031] Reference Figure 6 As shown, the circuit board assembly of the utility model includes a circuit board body 25, on which a wiring hole 26 is provided. The circuit board body 25 is provided with the circuit board connector a described in Example 1 through the wiring hole 26 and fixed by welding.

[0032] The above does not limit the present invention in any form. Although the present invention has been disclosed as a preferred implementation case as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the equivalent implementation cases of equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A connector for a circuit board, comprising a terminal block (1) and a connection terminal (2), wherein the connection terminal (2) is plugged into a terminal plug-in cavity (3) of the terminal block (1), characterized in that: The front end of the wiring terminal (2) is integrally stamped with a buckle (4) extending out of the terminal seat (1); the buckle (4) comprises a first elastic clamping foot (5) and a second elastic clamping foot (6) arranged opposite to each other; the front ends of the first elastic clamping foot (5) and the second elastic clamping foot (6) are provided with an inwardly bent conical guide surface (7) for plugging; the rear ends of the first elastic clamping foot (5) and the second elastic clamping foot (6) are provided with an inwardly bent first clamping surface (8) and a second clamping surface (9); a smoothly transitional clamping groove (10) is formed between the first clamping surface (8) and the second clamping surface (9).

2. The circuit board connector according to claim 1, characterized in that: The front end of the connecting terminal (2) is provided with a "U"-shaped accommodating cavity (12) for accommodating a copper wire (11), and a conical accommodating cavity (13) communicating with the "U"-shaped accommodating cavity (12) is formed between the two second clamping surfaces (9), and a tin groove (14) is provided at the front end of the conical accommodating cavity (13).

3. The circuit board connector according to claim 2, characterized in that: The connection terminal (2) is provided with small wire pins (15) on both sides corresponding to the "U"-shaped accommodating cavity (12), and the connection terminal (2) is provided with large wire pins (16) on both sides of the rear end.

4. The circuit board connector according to claim 2, wherein: The connection terminal (2) has a retaining spring (28) integrally stamped and formed at the rear of the "U"-shaped accommodating cavity (12), and a hanging platform (17) connected to the retaining spring (28) is provided in the terminal seat (1).

5. The circuit board connector according to claim 4, characterized in that: A guide groove (18) for guiding and cooperating with the anti-retraction spring piece (28) is provided at the rear end of the hanging platform (17), and an unlocking groove (19) communicating with the anti-retraction spring piece (28) is provided at the front of the hanging platform (17).

6. The circuit board connector according to claim 4, characterized in that: The connection terminal (2) is provided with positioning feet (20) on both sides corresponding to the stop spring (28), and the plug-in cavity (3) of the terminal seat (1) is provided with a positioning step (27) that cooperates with the positioning feet (20).

7. The circuit board connector according to claim 1, wherein: The side surface of the terminal seat (1) is provided with an anti-fouling protrusion (21) and an anti-stress groove (22).

8. The circuit board connector according to claim 1, wherein: A chamfer (23) is provided at the front end of the connection terminal (2) at a middle position corresponding to the clamping groove (10).

9. The circuit board connector according to claim 4, characterized in that: A reinforcing rib (24) is integrally stamped and formed on the stop spring piece (28).

10. A circuit board assembly, comprising a circuit board body (25), wherein the circuit board body (25) is provided with a wiring hole (26), characterized in that: The circuit board body (25) is provided with a circuit board connector (a) as claimed in any one of claims 1 to 9 through a wiring hole (26).

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