Resistance value calibration clamp

Abstract

The utility model discloses a resistor resistance value calibration clamp, which comprises a PCB (printed circuit board) provided with a probe hole, and is characterized by comprising a base, a vertical frame arranged on the base, a PCB pressing assembly arranged on the side wall of the vertical frame, a PCB tray arranged on the base, a test pin, a potentiometer and a probe. Holes are formed in the PCB tray, the probes penetrate through the holes and are in one-to-one correspondence with probe holes in the PCB, and the potentiometer is electrically connected with the probes and the test pins. The clamp can stably clamp the PCB, the potentiometer is electrically connected with the probe and the test pin, the test pin is connected with a universal meter when the clamp is used, calibration can be rapidly started and the accurate resistance value of the resistor can be obtained in real time only by rotating the potentiometer, time is saved, and calibration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a resistor calibration fixture, in particular to a resistor value calibration fixture. Background Art

[0002] Traditional resistor value calibration methods usually directly test on the PCB with instruments. If the resistance value needs to be changed, it also involves cumbersome operation steps and a long test cycle, making it difficult to meet the requirements of modern electronic manufacturing for efficient and accurate calibration. A tool that can quickly, accurately, and flexibly adjust the resistance value on the PCB is needed to improve the detection accuracy of circuit signals. Summary of the Utility Model

[0003] The present technology provides a resistor value calibration fixture that can quickly calibrate the resistance value of hardware and improve the detection accuracy of circuit signals.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A resistor value calibration fixture includes a PCB provided with probe holes, a base, a vertical frame provided on the base, a PCB pressing component provided on the side wall of the vertical frame, a PCB tray provided on the base, test pins, a potentiometer, and probes. The PCB tray is provided with holes, and the probes penetrate the holes and correspond to the probe holes on the PCB one by one. The potentiometer is electrically connected to the probes and the test pins.

[0006] Preferably, the pressing component includes a handle, a fixing member, a pressing rod, a pressing plate, a pressing column, and a positioning column. The handle is hinged to both the fixing member and the pressing rod at the same time. The pressing rod is slidably fixed on the vertical frame through the fixing member. The pressing plate is fixed at the bottom of the pressing rod. The pressing column is fixed at the bottom of the pressing plate. The positioning column is fixed on the base. The pressing plate is slidably sleeved on the positioning column.

[0007] Preferably, the PCB tray is elastically connected to the base.

[0008] Preferably, the potentiometer is arranged inside the base.

[0009] The above technical solutions are only a feasible technical solution of the utility model. The protection scope of the utility model is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0010] The above utility model has the following advantages or beneficial effects:

[0011] The fixture of the present utility model can firmly clamp the PCB board. Since the potentiometer is electrically connected to the probe and the test pin, by connecting the test pin to a multimeter, only by rotating the potentiometer, calibration can be quickly started and the accurate resistance value can be obtained in real time, saving time and improving the calibration efficiency. Description of the Drawings

[0012] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, the present utility model and its features, shape and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0013] Figure 1 It is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 an enlarged schematic view of area A in

[0015] Figure 3 It is a schematic structural diagram of the pressing component of the present utility model;

[0016] Figure 4 It is a schematic structural diagram of the PCB with probe holes of the present utility model. Description of the Drawings:

[0018] 1 - pressing component, 2 - PCB tray, 3 - test pin, 4 - vertical frame, 5 - base, 6 - potentiometer, 7 - probe, 8 - hole, 9 - PCB, 10 - probe hole, 11 - handle, 12 - fixing piece, 13 - pressing plate, 14 - positioning post, 15 - pressing rod, 16 - pressing column. Detailed Embodiments

[0019] The following further describes the structure in the present utility model with reference to the drawings and specific embodiments, but it is not a limitation of the present utility model.

[0020] A resistance value calibration fixture proposed by the present utility model includes a PCB 9 with probe holes 10, a base 5, a vertical frame 4 provided on the base 5, a PCB pressing component 1 provided on the side wall of the vertical frame 4, a PCB tray 2 provided on the base 5, a test pin 3, a potentiometer 6 and a probe 7. The test pin 3 and the probe 7 both penetrate through the base 5. The potentiometer 6 is placed inside the base 5, and only the knob extends out. The PCB tray 2 is provided with holes 8. The probe 7 penetrates through the holes 8 and corresponds to the probe holes 10 on the PCB one by one. The bottom ends of the test pin 3 and the probe 7 are electrically connected to the potentiometer 6 respectively.

[0021] Preferably, the pressing assembly 1 includes a handle 11, a fixing member 12, a pressing rod 15, a pressing plate 13, a pressing column 16 and a positioning column 14. The handle 11 is hinged to both the fixing member 12 and the pressing rod 15. The pressing rod 15 is slidably fixed to the vertical frame 4 through the fixing member 12. The pressing plate 13 is fixed to the bottom of the pressing rod 15. The pressing column 16 is fixed to the bottom of the pressing plate 13. The positioning column 14 is fixed to the base 5. The pressing plate 13 is slidably sleeved on the positioning column 14.

[0022] Preferably, the PCB tray 2 is elastically connected to the base 5 and is resiliently arranged on the base 5. A spring device is provided between the bottom of the PCB tray 2 and the base 5.

[0023] Preferably, the potentiometer 6 is arranged inside the base 5. And the base 5 can be opened by flipping the cover for easy connection and repair of the circuit.

[0024] During use, place the circuit board to be calibrated in the fixture, rotate the handle 11, the pressing rod 15 moves vertically downward, and the pressing plate 13 also moves downward under the positioning of the positioning column 14 to clamp the circuit board. At this time, the probe holes 10 on the PCB and the probes 7 are in contact due to pressing. The test pin 3 is connected to a multimeter, power is supplied to the PCB and an accurate analog signal quantity is input. Adjust the knob of the potentiometer 6 until the multimeter shows an accurate output voltage value, that is, the resistance value of the current potentiometer 6 is equal to the resistance value when the circuit calibration is completed, and the calibration is completed. It is also possible to connect to a host device and observe the values on a computer, which will not be elaborated here.

[0025] Those skilled in the art should understand that those skilled in the art can achieve variations in combination with the prior art and the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention and will not be elaborated here.

[0026] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments. The devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A resistor value rapid calibration fixture, comprising a PCB with a probe hole, characterized in that: It includes a base, a stand arranged on the base, a PCB clamping assembly arranged on the side wall of the stand, a PCB tray arranged on the base, a test pin, a potentiometer and a probe. The PCB tray is provided with holes, the probes pass through the holes and correspond one-to-one with the probe holes on the PCB, and the potentiometer is electrically connected to the probes and the test pins.

2. The resistor value rapid calibration fixture as claimed in claim 1, characterized in that: The clamping assembly includes a handle, a fixing, a pressure rod, a pressure plate, a pressure column and a positioning column. The handle is hinged to the fixing and the pressure rod at the same time. The pressure rod is slidably fixed to the stand by the fixing, the pressure plate is fixed to the bottom of the pressure rod, the pressure column is fixed to the bottom of the pressure plate, the positioning column is fixed to the base, and the pressure plate is slidably sleeved on the positioning column.

3. The resistor value rapid calibration fixture as claimed in claim 1, characterized in that: The PCB tray is elastically connected to the base.

4. The resistor value rapid calibration fixture as claimed in claim 1, characterized in that: The potentiometer is arranged inside the base.

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