Welding-free fisheye terminal and printed circuit board

Abstract

The utility model discloses a welding-free fisheye terminal and a printed circuit board in the technical field of connecting terminals, and aims to solve the problem that a conductive terminal is easy to fall off or poor in contact in a vibration environment due to insufficient loosening force between the conductive terminal and the PCB when the conductive terminal is connected with the PCB in the prior art. The electric connector comprises a pressing rod, the pressing rod comprises an extrusion block and a top cover arranged at the top of the extrusion block, elastic arms are symmetrically arranged on the two sides of the outer wall of the extrusion block, the bottoms of the two elastic arms are provided with the same terminal, the extrusion block, the terminal and the two elastic arms are matched to form a cavity, and the inner wall of one elastic arm is provided with a protrusion on the inner side of the cavity; according to the utility model, the interior of the cavity is filled through the extrusion block, and the extrusion block, the projection and the two elastic arms extrude each other to ensure that the elastic arms do not deform any more, thereby ensuring that the elastic arms are tightly attached to the printed circuit board, improving the loosening force, avoiding the problem of falling off or poor contact in a vibration environment, and prolonging the service life of the printed circuit board. And the use effect of the device is ensured.

Description

Technical Field

[0001] The utility model relates to a solder-free fisheye terminal and a printed circuit board, belonging to the technical field of connection terminals. Background Art

[0002] The electronics industry usually uses conductive terminals to contact the conductive bushings on the PCB board to achieve conduction between the external circuit and the internal circuit of the PCB board. This connection is usually made by soldering or press-fitting of solderless terminals. The press-fitting connection method of solderless terminals expects less pressure and greater release force, but it often faces the problem of too large a press-fit force or too small a release force, making it difficult to achieve a balance. A slight deviation will lead to poor contact, and the PCB board is more likely to loosen in a vibration environment, which in turn leads to a decrease in resistance to conduction.

[0003] In summary, when the existing conductive terminals are connected to the PCB board, the loosening force between the two is insufficient, and the terminals are prone to fall off or poor contact in a vibration environment, which affects the use effect of the device. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a solder-free fisheye terminal and a printed circuit board to solve the problem that when the existing conductive terminal is connected to a PCB board, the loosening force between the two is insufficient and the terminal is prone to falling off or poor contact in a vibration environment.

[0005] In order to solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0006] In the first aspect, the utility model provides a solderless fisheye terminal, including a pressure rod, the pressure rod including an extrusion block and a top cover arranged on the top of the extrusion block, elastic arms are symmetrically arranged on both sides of the outer wall of the extrusion block, the same terminal is arranged at the bottom of the two elastic arms, the extrusion block, the terminal and the two elastic arms cooperate to form a cavity, and the inner wall of one of the elastic arms is provided with a protrusion on the inner side of the cavity.

[0007] Furthermore, a terminal base is provided on a side of the terminal outer wall away from the elastic arm.

[0008] Furthermore, a first notch is formed on the top of the inner wall of the cavity at both sides of the extrusion block.

[0009] Furthermore, a second notch is formed at the top of the outer walls of the two elastic arms on one side of the extrusion block.

[0010] Furthermore, the material of the extrusion block is brass.

[0011] Furthermore, the length of the extrusion block is smaller than the height of the cavity.

[0012] In a second aspect, the utility model provides a printed circuit board, which adopts the solderless fisheye terminal described in the first aspect, and includes a circuit board, on which a socket for placing the solderless fisheye terminal is opened, and a conductive bushing is matched in the socket.

[0013] Furthermore, the conductive bushing is interference-fitted with the two elastic arms in the solderless fisheye terminal.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The solder-free fisheye terminal has a protrusion that guides the extrusion block, so that the extrusion block is offset, and the bottom end of the extrusion block is offset to the inner wall of the cavity and fits therewith, so that the extrusion block and the elastic arm form an undercut, thereby ensuring that the extrusion block is not easy to fall off; at the same time, the extrusion block fills the inside of the cavity, and the extrusion block, the protrusion and the two elastic arms squeeze each other to ensure that the elastic arm is no longer deformed, thereby ensuring that the elastic arm is closely fitted with the printed circuit board, improving the loosening force, avoiding the problem of falling off or poor contact under a vibration environment, and ensuring the use effect of the device;

[0016] 2. The solder-free fisheye terminal is provided with self-fracture features and protrusion features, and the cavity is filled with the protrusion and the extrusion block, which solves the problem of deformation of the elastic arm of the traditional fisheye terminal after being squeezed by the circuit board, and solves the problem of the difficulty in balancing the insertion force and the loosening force, which can reduce the insertion force requirement while increasing the loosening force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a solder-free fisheye terminal provided according to an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of a front cross-section of a printed circuit board provided according to an embodiment of the utility model;

[0019] Figure 3 The utility model is a schematic diagram of a front cross-section of a printed circuit board after installing a solder-free fisheye terminal according to an embodiment of the utility model.

[0020] In the figure: 1, pressure rod; 2, elastic arm; 3, cavity; 4, protrusion; 5, first notch; 6, second notch; 7, extrusion block; 8, top cover; 9, terminal; 10, terminal base; 11, circuit board; 12, conductive bushing. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Embodiment 1:

[0024] like Figure 1 As shown, the utility model provides a solder-free fisheye terminal, including a pressure rod 1, the pressure rod 1 includes an extrusion block 7 and a top cover 8 arranged on the top of the extrusion block 7, elastic arms 2 are symmetrically provided on both sides of the outer wall of the extrusion block 7, and the same terminal 9 is provided at the bottom of the two elastic arms 2. The extrusion block 7, the terminal 9 and the two elastic arms 2 cooperate to form a cavity 3, and a protrusion 4 is provided on the inner wall of one of the elastic arms 2 on the inner side of the cavity 3.

[0025] Specifically, during operation, the two elastic arms 2 are placed inside the corresponding printed circuit board, and the two elastic arms 2 and the printed circuit board are interference fit, so when placed, the two elastic arms 2 are squeezed close to each other and kept in contact with the printed circuit board, and then the stamping equipment starts to work, pushing the top cover 8 to approach the inside of the cavity 3, and the extrusion block 7 moves with the top cover 8. After being impacted by the stamping equipment, the connection between the extrusion block 7 and the two elastic arms 2 is disconnected, and the extrusion block 7 moves to the inside of the cavity 3 until the bottom end of the top cover 8 is tightly fitted with the top of the two elastic arms 2, so that the elastic arms 2 stop after further deformation, completing the deformation of the elastic arms 2; as the extrusion block 7 moves to the inside of the cavity 3 The protrusion 4 guides the extrusion block 7, thereby causing the extrusion block 7 to shift, and the bottom end of the extrusion block 7 shifts toward the inner wall of the cavity 3 and fits therewith, so that the extrusion block 7 and the elastic arm 2 form an inverted buckle, thereby ensuring that the extrusion block 7 is not easy to fall off; at the same time, the extrusion block 7 fills the interior of the cavity 3, and the extrusion block 7, the protrusion 4 and the two elastic arms 2 squeeze each other to ensure that the elastic arms 2 are no longer deformed, thereby ensuring that the elastic arms 2 are closely fitted to the printed circuit board, increasing the loosening force, avoiding the problem of falling off or poor contact in a vibration environment, and ensuring the use effect of the device; optionally, the elastic arm 2 and the protrusion 4 are integrally formed, and the two elastic arms 2 are integrally formed with the terminal 9.

[0026] In one embodiment, a terminal base 10 is provided on the outer wall of the terminal 9 away from the elastic arm 2 .

[0027] In one embodiment, a first notch 5 is formed at the top of the inner wall of the cavity 3 on both sides of the extrusion block 7 , and a second notch 6 is formed at the top of the outer walls of the two elastic arms 2 on one side of the extrusion block 7 .

[0028] Specifically, when the pressure rod 1 is not impacted, the extrusion block 7 and the top cover 8 can be maintained on the elastic arm 2. When the pressure rod 1 is impacted, the extrusion block 7 and the elastic arm 2 are easily disconnected on one side of the first notch 5 and the second notch 6, so that the extrusion block 7 can avoid entering the interior of the cavity 3, and avoid the connection between the extrusion block 7 and the elastic arm 2 being too tight to be disconnected, thereby ensuring the stability of the device during operation; optionally, the size of the first notch 5 and the second notch 6 can be adjusted according to different materials and thicknesses, thereby reducing the insertion force requirement.

[0029] In one embodiment, the extrusion block 7 is made of brass; the length of the extrusion block 7 is smaller than the height of the cavity 3 to prevent the top cover 8 from being unable to fit with the tops of the two elastic arms 2 after the extrusion block 7 fills the cavity 3 .

[0030] The utility model is provided with a self-fracture feature and a protrusion feature, and uses the protrusion 4 and the extrusion block 7 to fill the cavity 3, thereby solving the problem that the elastic arm 2 of the traditional fisheye terminal is deformed after being squeezed by the circuit board, and at the same time solves the problem that the insertion force and the loosening force are difficult to balance, which can reduce the insertion force requirement while increasing the loosening force. Embodiment 2:

[0031] like Figure 2-3 As shown, the utility model provides a printed circuit board, adopting the solderless fisheye terminal described in Example 1, characterized in that it includes a circuit board 11, on which a socket for placing the solderless fisheye terminal is opened, and a conductive bushing 12 is matched in the socket; the conductive bushing 12 is interference fit with the two elastic arms 2 in the solderless fisheye terminal.

[0032] Specifically, when the two elastic arms 2 are placed inside the conductive bushing 12, due to the interference fit between the two, the two elastic arms 2 are squeezed close to each other and tightly fit against the inner wall of the conductive bushing 12, further improving the loosening force of the solderless fisheye terminal.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A solder-free fisheye terminal, characterized in that: The pressure rod (1) comprises an extrusion block (7) and a top cover (8) arranged on the top of the extrusion block (7); elastic arms (2) are symmetrically arranged on both sides of the outer wall of the extrusion block (7); the bottoms of the two elastic arms (2) are provided with a same terminal (9); the extrusion block (7), the terminal (9) and the two elastic arms (2) cooperate to form a cavity (3); the inner wall of one of the elastic arms (2) is provided with a protrusion (4) on the inner side of the cavity (3).

2. The solder-free fisheye terminal according to claim 1, characterized in that: A terminal base (10) is provided on a side of the outer wall of the terminal (9) away from the elastic arm (2).

3. The solder-free fisheye terminal according to claim 1, characterized in that: A first notch (5) is provided at the top of the inner wall of the cavity (3) on both sides of the extrusion block (7).

4. The solder-free fisheye terminal according to claim 3, characterized in that: A second notch (6) is provided at the top of the outer wall of the two elastic arms (2) on one side of the extrusion block (7).

5. The solder-free fisheye terminal according to claim 1, characterized in that: The material of the extrusion block (7) is brass.

6. The solder-free fisheye terminal according to claim 1, characterized in that: The length of the extrusion block (7) is smaller than the height of the cavity (3).

7. A printed circuit board, using the solder-free fisheye terminal according to any one of claims 1 to 6, characterized in that: It comprises a circuit board (11), wherein a socket for accommodating the solder-free fisheye terminal is provided on the circuit board (11), and a conductive bushing (12) is matched in the socket.

8. The printed circuit board according to claim 7, characterized in that: The conductive bushing (12) is interference-fitted with the two elastic arms (2) in the solder-free fisheye terminal.

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