Magnet testing device

Abstract

The utility model provides a magnet testing device, relates to the field of magnet polarity detection, and provides the following scheme: the magnet testing device comprises a mainboard and a circuit board assembly, the circuit board assembly is placed at the top of the mainboard, the top of the circuit board assembly is provided with a USB interface and two indicating lamps, the top of the circuit board assembly is fixedly connected with a plurality of pins, and the pins are fixedly connected with the mainboard. One ends of the plurality of pins are fixedly connected with the same Hall switch, and the circuit board assembly, the pins and the Hall switch cooperate to detect the polarity of the magnet. The magnet is fixed on the placing frame through cooperation of the clamping plate and the pressing spring, the circuit board assembly is connected with a power supply through the USB interface, the placing frame is slowly pushed forwards to enable the magnet to be gradually close to the Hall switch, when the red light of the two indicating lamps is on to indicate the N level of the magnet, and the green light is on to indicate the S level of the magnet, a user can conveniently observe a test result. And the whole structure is simple, light and convenient to carry.

Description

Technical Field

[0001] This utility model relates to the field of magnetic polarity detection technology, and in particular to a device for testing magnets. Background Technology

[0002] The simple polarity test of incoming magnets refers to the basic inspection process performed after receiving a new batch of magnets to determine the position of the north pole (N pole) and south pole (S pole) of each magnet. This test ensures the correct installation and use of the magnets in subsequent applications, especially in applications that require precise control of the magnetic field direction, such as Hall effect sensors, motors, and speakers.

[0003] Traditional testing methods typically involve manual operation, where testers rely on experience and visual inspection of the instrument's display screen, combined with their understanding of quality control standards, to conduct tests. Because these traditional methods require specific testing equipment, it's often necessary to replace batteries or find an unused power source before testing to ensure the testing equipment is in optimal working condition. This approach has drawbacks: testers need to concentrate on the display screen, which can easily lead to fatigue, and it involves numerous instruments and types, resulting in significant economic investment. Therefore, we propose a testing magnet device to solve this problem. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a testing magnet device to more accurately resolve the problems described above.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model proposes a magnet testing device, including a motherboard and a circuit board assembly. The circuit board assembly is placed on top of the motherboard. The top of the circuit board assembly is provided with a USB interface and two indicator lights. Several pins are fixedly connected to the top of the circuit board assembly. One end of each pin is fixedly connected to the same Hall switch. The circuit board assembly, pins, and Hall switch work together to detect the polarity of the magnet. The two indicator lights are used to provide feedback on the detection results.

[0007] Furthermore, the top of the motherboard is provided with a placement slot, and the inner walls on both the left and right sides of the placement slot are provided with protruding pillars. The protruding pillars are used to make an interference fit with the circuit board assembly so as to movably engage the circuit board assembly in the placement slot.

[0008] Furthermore, a fixing plate is fixedly installed on the top of the motherboard. A vertical hole is opened on the rear side of the top of the fixing plate, and multiple horizontal slots are opened on the inner wall of the front side of the vertical hole. The pins are movably engaged in the corresponding horizontal slots.

[0009] Furthermore, the top of the inner walls on both sides of the transverse groove is configured as a flanged structure, and the left and right sides of the bottom inner wall of the transverse groove are configured as rounded corners.

[0010] Furthermore, a positioning groove is provided on the top rear side of the motherboard. The positioning groove is connected to a vertical hole, and the positioning groove and the vertical hole form a positioning structure. The Hall switch is movably engaged in the positioning structure.

[0011] Furthermore, the motherboard has two built-in slots on its rear side, in which slide plates are slidably installed. The same placement frame is fixedly installed on one side of the two slide plates. The placement frame is used to place magnets. A resistance spring is fixedly installed on one side of the slide plate. One end of the resistance spring is fixedly connected to the inner wall of the corresponding built-in slot.

[0012] Furthermore, the front side of the placement frame is thin-walled and has a notch, and multiple compression springs are fixedly installed on the rear inner wall of the placement frame, with one end of each compression spring fixedly connected to the same clamping plate.

[0013] Furthermore, the motherboard has two gripping grooves on its top, one side of which is open, and several lightweight holes on its top.

[0014] The beneficial effects of this utility model are as follows:

[0015] The magnet is fixed to the placement frame by the cooperation of the clamp and the compression spring, and the circuit board assembly is connected to the power supply through the USB interface. Then, the placement frame is slowly pushed forward to make the magnet gradually approach the Hall switch. When the red light of the two indicator lights is on, it indicates the N class of the magnet, and the green light is on, indicating the S class. This makes it easy for users to observe the test results. The overall structure is simple, lightweight and easy to carry. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of a magnet testing device proposed in this utility model;

[0017] Figure 2 This is a two-dimensional structural diagram of a magnet testing device proposed in this utility model from a second perspective.

[0018] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0019] Figure 4 This is a cross-sectional structural diagram of a testing magnet device proposed in this utility model.

[0020] The attached figures are labeled as follows:

[0021] In the diagram: 1. Mainboard; 2. Circuit board assembly; 3. USB interface; 4. Indicator light; 5. Pin; 6. Hall switch; 7. Placement slot; 8. Protruding post; 9. Fixing plate; 10. Horizontal slot; 11. Internal slot; 12. Slide plate; 13. Placement frame; 14. Resistance spring; 15. Notch; 16. Compression spring; 17. Clamping plate; 18. Grip slot; 19. Lightweight hole. Detailed Implementation

[0022] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will further explain this utility model.

[0023] Please refer to Figures 1-4 The present invention proposes a magnet testing device, including a main board 1 and a circuit board assembly 2. The circuit board assembly 2 is placed on top of the main board 1. The top of the circuit board assembly 2 is provided with a USB interface 3 and two indicator lights 4. Several pins 5 are fixedly connected to the top of the circuit board assembly 2. One end of the multiple pins 5 is fixedly connected to the same Hall switch 6. The circuit board assembly 2, the pins 5 and the Hall switch 6 work together to detect the polarity of the magnet. The two indicator lights 4 are used to provide feedback on the detection results.

[0024] It should be noted that circuit board assembly 2 is a PCBA board. A PCBA board refers to the assembled state, which includes all necessary electronic components, connectors, and microcontrollers. Hall switch 6 is a sensor that works based on the Hall effect principle. It can detect the presence and changes of magnetic fields and convert this physical quantity into an electrical signal output. When the N pole of the magnet is close to Hall switch 6, Hall switch 6 senses a positive magnetic field and outputs a corresponding high-level signal. This signal is sent to the microcontroller or logic circuit on circuit board assembly 2 to trigger the red light to light up. When the S pole of the magnet is close to Hall switch 6, Hall switch 6 senses a reverse magnetic field and outputs a corresponding low-level state signal, causing the green light to light up.

[0025] In this embodiment, the top of the motherboard 1 is provided with a placement groove 7, and the inner walls on both the left and right sides of the placement groove 7 are provided with protruding posts 8. The protruding posts 8 are used to press against the circuit board assembly 2 to movably engage the circuit board assembly 2 in the placement groove.

[0026] In this embodiment, a fixing plate 9 is fixedly installed on the top of the motherboard 1. A vertical hole is opened on the rear side of the top of the fixing plate 9. A plurality of horizontal grooves 10 are opened on the inner wall of the front side of the vertical hole. The pin 5 is movably engaged in the corresponding horizontal groove 10. The horizontal groove 10 plays a limiting and protective role for the pin 5, preventing the pin 5 from being damaged by external impact.

[0027] In this embodiment, the top of the inner walls on both sides of the transverse groove 10 is set as a flange structure, and the left and right sides of the bottom inner wall of the transverse groove 10 are set as rounded corners. The flange structure makes it easy for the pin 5 to slide into the transverse groove 10 and will not collide with the fixing plate 9 during the process of being inserted into the transverse groove 10. The rounded corners make the contact area between the bottom inner wall of the transverse groove 10 and the pin 5 larger, so that the pin 5 is placed more stably.

[0028] In this embodiment, a positioning groove is provided on the top rear side of the main board 1. The positioning groove is connected to the vertical hole, and the positioning groove and the vertical hole form a positioning structure. The Hall switch 6 is movably engaged in the positioning structure to limit the position of the Hall switch 6, ensuring that the relative position between the Hall switch 6 and the magnet is consistent during each test, reducing measurement errors caused by position changes, and improving the consistency of test results. The covering of the Hall switch 6 by the fixing plate 9 can also play a shielding role, reducing the influence of external magnetic fields on the Hall switch 6.

[0029] In this embodiment, two built-in slots 11 are provided on the rear side of the motherboard 1. A slide plate 12 is slidably installed in the built-in slot 11. The same placement frame 13 is fixedly installed on one side of the two slide plates 12. The placement frame 13 is used to place the magnet. A resistance spring 14 is fixedly installed on one side of the slide plate 12. One end of the resistance spring 14 is fixedly connected to the inner wall of the corresponding built-in slot 11. As the placement frame 13 is pushed closer to the Hall switch 6, the resistance spring 14 is continuously compressed. The closer the placement frame 13 is to the Hall switch 6, the greater the resistance it receives. Slowing down the speed allows the distance between the magnet and the Hall switch 6 to be gradually adjusted in smaller increments, preventing the magnet from directly contacting the Hall switch 6 and moving the magnet to a suitable distance.

[0030] It should be noted that direct contact with a magnet may cause physical damage to Hall switch 6, especially if the magnet is very strong or there is a collision between the two. When the magnet is too close to Hall switch 6, the magnetic field strength may exceed the operating range of the sensor, resulting in distortion or inaccuracy of the output signal. Hall effect devices may enter a saturation state in a strong magnetic field and fail to reflect changes in the magnetic field correctly.

[0031] In this embodiment, the front side of the placement frame 13 is thin-walled and has a notch 15. Multiple compression springs 16 are fixedly installed on the rear inner wall of the placement frame 13. One end of each compression spring 16 is fixedly connected to the same clamp 17, which facilitates fixing the magnet to the placement frame 13. The front side of the placement frame 13 is thin-walled and has a notch 15 to avoid the thickness of the placement frame 13 affecting the Hall switch 6's detection of the magnet.

[0032] In this embodiment, the top of the motherboard 1 has two gripping grooves 18, one side of which is open. The top of the motherboard 1 has several lightweight holes 19. The gripping grooves 18 facilitate gripping the entire device, and the lightweight holes 19 reduce the weight of the motherboard 1, thereby making it easier to carry the entire device.

[0033] The working principle of this utility model is as follows: the magnet is fixed on the placement frame 13 by the cooperation of the clamp 17 and the compression spring 16, so that one side of the magnet is in contact with the front inner wall of the placement frame 13, and the circuit board assembly 2 is connected to the power supply through the USB interface 3. Then, the placement frame 13 is slowly pushed forward so that the magnet gradually approaches the Hall switch 6. When the red light in the two indicator lights 4 is on, it indicates the N (North) position of the magnet, and the green light is on, indicating the S (South) position.

[0034] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A test magnet apparatus, characterized by, The device includes a motherboard and a circuit board assembly. The circuit board assembly is placed on top of the motherboard. The top of the circuit board assembly has a USB interface and two indicator lights. Several pins are fixedly connected to the top of the circuit board assembly. One end of each pin is fixedly connected to the same Hall switch. The circuit board assembly, pins, and Hall switch work together to detect the polarity of a magnet. The two indicator lights are used to provide feedback on the detection results.

2. A test magnet apparatus as claimed in claim 1, wherein The motherboard has a placement slot at the top, and protruding posts are provided on the inner walls of the left and right sides of the placement slot. The protruding posts are used to make an interference fit with the circuit board assembly so as to movably engage the circuit board assembly in the placement slot.

3. The test magnet apparatus of claim 1, wherein, A fixing plate is fixedly installed on the top of the motherboard. A vertical hole is opened on the rear side of the top of the fixing plate. Multiple horizontal slots are opened on the inner wall of the front side of the vertical hole. The pins are movably engaged in the corresponding horizontal slots.

4. A test magnet apparatus as claimed in claim 3, wherein The top of the inner walls on both sides of the transverse groove is set with a flange structure, and the bottom inner walls on both sides of the transverse groove are set with rounded corners.

5. The test magnet apparatus of claim 3, wherein, The motherboard has a positioning groove on the top rear side, which is connected to a vertical hole. The positioning groove and the vertical hole form a positioning structure, and the Hall switch is movably engaged in the positioning structure.

6. The test magnet apparatus of claim 1, wherein, The motherboard has two built-in slots on its rear side. A slide plate is slidably installed in the built-in slot. The same placement frame is fixedly installed on one side of the two slide plates. The placement frame is used to place magnets. A resistance spring is fixedly installed on one side of the slide plate. One end of the resistance spring is fixedly connected to the inner wall of the corresponding built-in slot.

7. A test magnet apparatus as claimed in claim 6, wherein The front side of the placement frame is thin-walled and has a notch. Multiple compression springs are fixedly installed on the inner rear wall of the placement frame, and one end of each compression spring is fixedly connected to the same clamping plate.

8. The test magnet apparatus of claim 1, wherein, The motherboard has two gripping grooves on its top, one side of which is open, and several lightweight holes on its top.

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