Pin assembling structure of piezoresistor

Abstract

The utility model discloses a pin assembly structure of a piezoresistor, and relates to the technical field of piezoresistors. The pin assembly structure comprises a resistor main body, four groups of positioning pins are fixedly connected to the bottom of the resistor main body, the positioning pins are arranged in a rectangular array, positioning grooves are formed in the positions, away from fixing balls, outside the positioning pins, and the fixing balls are embedded in the positioning grooves. The three sets of fixing balls are arranged in the positioning groove in a circumferential array mode, the mounting holes are pushed through the lifting springs, the fixing balls slide along the inner wall of the positioning sleeve, the fixing balls slide into the mounting holes along the sliding holes, the fixing balls are embedded in the positioning groove, and therefore the positioning pins are fixed. The lifting shell can slide downwards along the positioning sleeve by rotating the positioning sleeve, so that the effects of positioning installation and quick disassembly are achieved, the problem that a circuit board is not subjected to suction welding frequently when a resistor main body is replaced due to previous welding is solved, and the disassembly convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of varistor, in particular to a pin assembly structure of a varistor. Background Art

[0002] A varistor is a special type of resistor whose resistance changes with applied voltage, exhibiting a nonlinear volt-ampere characteristic. This characteristic makes varistors important for circuit protection, particularly in the face of overvoltage or surge voltages. They can respond quickly to clamp the voltage within a relatively safe range, thus protecting other components in the circuit from damage.

[0003] According to the varistor disclosed in Chinese patent publication number CN205092103U, it includes a substrate, on which a collector and a discharge electrode are provided. The collector is a metal plate made of a metal material fixed relative to the substrate. There are two metal plates, which are provided on two opposite sides of the substrate. The two metal plates are electrically connected. The two metal plates are fixed by fasteners, and the substrate is pressed tightly between the two metal plates. The fasteners are made of a conductive metal material, and the two metal plates are electrically connected by the fasteners. The metal plates are made of aluminum. The utility model improves the current carrying capacity of the VDR and prevents the burning of the VDR. When manufacturers manufacture VDRs, the VDR has a fixed current carrying value; it eliminates the vibration of the electromotive force generated by the impact current, and improves the current carrying capacity of the same VDR. Experiments have shown that the impact current capacity is doubled. It prevents current from flowing into the short-circuit point, forming high heat and causing fire.

[0004] When the varistor is installed on the circuit board in the above method, soldering is still used to connect the pins to the circuit board. However, this method is difficult to replace when the varistor is damaged, and multiple soldering can easily cause the circuit board to have no tin liquid adsorption problem. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a pin assembly structure for a varistor, which solves the problem of connecting the pins to the circuit board by welding. However, this method is difficult to replace when the varistor is damaged, and multiple soldering operations can easily cause the circuit board to lack tin liquid adsorption.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: the pin assembly structure of the varistor includes a resistor body, a positioning pin is fixedly connected to the bottom of the resistor body, and there are four groups of positioning pins arranged in a rectangular array. A positioning groove is provided on the outside of the positioning pin away from the position of the fixed ball, and a fixing ball is embedded in the positioning groove. There are three groups of fixing balls in a circular array inside the positioning groove. A positioning sleeve is abutted on the side of the fixing ball away from the positioning groove, a positioning column is fixedly connected to the outside of the positioning sleeve, and a fixing component is provided on the outside of the fixing ball.

[0007] Preferably, the fixing assembly includes a lifting shell, a mounting hole is provided inside the lifting shell, a sliding hole is provided on the outside of the mounting hole near the top, and the fixing ball is slidably connected inside the sliding hole.

[0008] Preferably, a telescopic slot is provided inside the positioning column, the positioning sleeve is fixedly connected to the inner side of the telescopic slot near the top, and a pushing component is provided at the bottom of the mounting hole.

[0009] Preferably, the pushing assembly includes a lifting spring, which is arranged inside the telescopic slot, one end of the lifting spring is fixedly connected to the bottom of the lifting shell, and the end of the lifting spring away from the lifting shell is fixedly connected to the inner side of the telescopic slot near the bottom.

[0010] Preferably, a positioning rod is fixedly connected to the bottom of the positioning column, telescopic holes are opened on both sides of the positioning rod, and mounting components are arranged inside the telescopic holes.

[0011] Preferably, the mounting assembly includes a positioning spring, the positioning spring is fixedly connected to the inside of the telescopic hole, and the side of the positioning spring away from the telescopic hole is fixedly connected to the outside of the positioning ball.

[0012] The utility model provides a pin assembly structure for a varistor. Compared with the prior art, it has the following advantages:

[0013] Beneficial effects:

[0014] 1. The pin assembly structure pushes the mounting hole through the lifting spring, allowing the fixed ball to slide along the inner wall of the positioning sleeve, so that the fixed ball slides into the mounting hole along the sliding hole, and the fixed ball is embedded in the positioning groove, thereby fixing the positioning pin. When disassembling, place the magnet at the bottom of the positioning column, and the lifting shell can slide down along the positioning sleeve, achieving the effect of positioning installation and quick disassembly, solving the problem of frequent circuit board non-soldering when replacing the resistor body due to welding in the past, and improving the convenience of disassembly.

[0015] 2. This pin assembly structure inserts the resistor body into the hole of the circuit board, and the positioning ball squeezes the positioning spring to retract into the telescopic hole. After insertion, the positioning spring pushes the positioning ball out from the telescopic hole, thereby fixing the positioning rod and achieving the effect of installing the resistor body. It solves the problem of only using the positioning column to weld on the circuit board, and once the positioning sleeve has a problem, soldering is still required, which improves the convenience of replacing the positioning column. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the positioning rod of the utility model;

[0020] Figure 5 For this utility model Figure 4 The enlarged structural diagram at B in the middle;

[0021] Figure 6 This is a schematic diagram of the explosion structure of the lifting shell of the utility model.

[0022] In the figure: 1. Resistor body; 2. Positioning pin; 3. Positioning slot; 4. Fixing ball; 5. Lifting shell; 6. Mounting hole; 7. Sliding hole; 8. Positioning column; 9. Telescopic slot; 10. Positioning sleeve; 11. Lifting spring; 12. Positioning rod; 13. Telescopic hole; 14. Positioning spring; 15. Positioning ball. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1-6 The utility model provides a technical solution: a pin assembly structure of a varistor, including a resistor body 1, a positioning pin 2 fixedly connected to the bottom of the resistor body 1, a total of four groups of positioning pins 2 arranged in a rectangular array, a positioning groove 3 is opened on the outside of the positioning pin 2 away from the fixing ball 4, a fixing ball 4 is embedded in the positioning groove 3, a total of three groups of fixing balls 4 are arranged in a circular array inside the positioning groove 3, a positioning sleeve 10 is abutted on the side of the fixing ball 4 away from the positioning groove 3, a positioning column 8 is fixedly connected to the outside of the positioning sleeve 10, a fixing component is arranged on the outside of the fixing ball 4, and the fixing component includes a lifting shell 5, a mounting hole 6 is opened inside the lifting shell 5, a sliding hole 7 is opened on the outside of the mounting hole 6 near the top, and the fixing ball 4 is slidably connected inside the sliding hole 7.

[0025] When the breaker is in operation, the fixing ball 4 is engaged with the positioning groove 3 and the positioning pin 2 is removed from the mounting hole 6. This achieves the effect of quick disassembly and assembly, and solves the problem of connecting the pin to the circuit board. However, this method is difficult to replace when the breaker is damaged, and multiple soldering may easily cause the circuit board to not have the tin liquid adsorption problem, thereby improving the convenience of replacing the breaker.

[0026] A telescopic slot 9 is provided inside the positioning column 8, and a positioning sleeve 10 is fixedly connected to the inner side of the telescopic slot 9 near the top position. A pushing assembly is provided at the bottom of the mounting hole 6, and the pushing assembly includes a lifting spring 11. The lifting spring 11 is provided inside the telescopic slot 9, and one end of the lifting spring 11 is fixedly connected to the bottom of the lifting shell 5, and the end of the lifting spring 11 away from the lifting shell 5 is fixedly connected to the inner side of the telescopic slot 9 near the bottom position.

[0027] During operation, the lifting shell 5 can be pushed by the lifting spring 11, allowing the lifting shell 5 to slide inside the positioning sleeve 10. When disassembly is required, a magnet is placed on the end of the lifting shell 5 away from the positioning pin 2, so that the mounting hole 6 compresses the lifting spring 11, and the fixing ball 4 is separated from the extrusion of the positioning sleeve 10, so that the fixing ball 4 can slide along the inside of the sliding hole 7, so that the positioning pin 2 can be taken out from the inside of the mounting hole 6. The overall installation can weld the positioning column 8 to the circuit board to ensure the service life, solve the problem of inconvenience in removing the positioning pin 2 from the inside of the mounting hole 6 after the positioning pin 2 is fixed, and improve the convenience of disassembly.

[0028] A positioning rod 12 is fixedly connected to the bottom of the positioning column 8, and telescopic holes 13 are opened on both sides of the positioning rod 12. An installation component is provided inside the telescopic hole 13, and the installation component includes a positioning spring 14. The positioning spring 14 is fixedly connected inside the telescopic hole 13, and the side of the positioning spring 14 away from the telescopic hole 13 is fixedly connected to the outside of the positioning ball 15.

[0029] During operation, when the resistor body 1 is installed as a whole, the resistor body 1 is inserted into the hole of the circuit board, and the positioning ball 15 squeezes the positioning spring 14 and retracts into the telescopic hole 13. After insertion, the positioning spring 14 pushes the positioning ball 15 to pop out inside the telescopic hole 13, thereby fixing the positioning rod 12, achieving the effect of installing the resistor body 1, solving the problem of only using the positioning column 8 to be welded on the circuit board, and once there is a problem with the positioning sleeve 10, soldering is still required, thereby improving the convenience of replacing the positioning column 8.

[0030] When the breaker is in operation, the fixing ball 4 is pushed down and the fixing ball 4 is pushed out of the sliding hole 7. When the breaker is in operation, the fixing ball 4 is pushed down and the fixing ball 4 is pushed out of the sliding hole 7. When the breaker is in operation, the fixing ball 4 is pushed down and the fixing ball 4 is pushed out of the sliding hole 7. When the breaker is in operation, the fixing ball 4 is pushed down and the fixing ball 4 is pushed out of the sliding hole 7. When the breaker is in operation, the fixing ball 4 is pushed down and the fixing ball 4 is pushed out of the sliding hole 7. The cam 14 is pressed against the bottom surface of the mounting hole 6, and the cam 14 is pressed against the bottom surface of the mounting hole 6, so that the cam 14 can slide along the inside of the sliding hole 7 to remove the cam 14.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pin assembly structure of a varistor, comprising a resistor body (1), characterized in that: The bottom of the resistor body (1) is fixedly connected with positioning pins (2), and the positioning pins (2) are arranged in a rectangular array in four groups. A positioning groove (3) is provided on the outside of the positioning pins (2) away from the fixing ball (4), and a fixing ball (4) is embedded in the positioning groove (3). There are three groups of the fixing balls (4) arranged in a circular array inside the positioning groove (3). A positioning sleeve (10) is abutted on the side of the fixing ball (4) away from the positioning groove (3), and a positioning column (8) is fixedly connected to the outside of the positioning sleeve (10). A fixing component is arranged on the outside of the fixing ball (4).

2. The pin assembly structure of a varistor according to claim 1, characterized in that: The fixing assembly comprises a lifting shell (5), a mounting hole (6) is provided inside the lifting shell (5), a sliding hole (7) is provided outside the mounting hole (6) near the top, and the fixing ball (4) is slidably connected inside the sliding hole (7).

3. The pin assembly structure of a varistor according to claim 2, characterized in that: A telescopic slot (9) is provided inside the positioning column (8), the positioning sleeve (10) is fixedly connected to the inner side of the telescopic slot (9) near the top, and a pushing component is provided at the bottom of the mounting hole (6).

4. The pin assembly structure of a varistor according to claim 3, characterized in that: The pushing assembly comprises a lifting spring (11), the lifting spring (11) being arranged inside the telescopic slot (9), one end of the lifting spring (11) being fixedly connected to the bottom of the lifting shell (5), and the end of the lifting spring (11) being away from the lifting shell (5) being fixedly connected to the inner side of the telescopic slot (9) near the bottom.

5. The pin assembly structure of a varistor according to claim 4, characterized in that: The bottom of the positioning column (8) is fixedly connected to a positioning rod (12), telescopic holes (13) are provided on both sides of the positioning rod (12), and mounting components are provided inside the telescopic holes (13).

6. The pin assembly structure of a varistor according to claim 5, characterized in that: The mounting assembly comprises a positioning spring (14), wherein the positioning spring (14) is fixedly connected to the inside of the telescopic hole (13), and the side of the positioning spring (14) away from the telescopic hole (13) is fixedly connected to the outside of the positioning ball (15).

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