Magnetic shaft push button switch

Abstract

The utility model relates to a kind of magnetic shaft button switch, including base, button and upper cover, upper cover and base buckle, it is characterized by: elastic member is equipped between button and base, circuit board is equipped in the base, and magnetic sensor is equipped on circuit board, and button side surface is equipped with magnet, button is driven magnet up-down movement by pressing relative base;Circuit board is electrically connected with terminal, and the end of terminal away from circuit board is set through base. Through the non-contact magnetic induction principle, signal change is generated using the relative displacement of magnet and TMR element, thereby realizing non-contact signal triggering, and in combination with the optimal distance setting, completely solve the mechanical wear, metal oxidation and contact pollution and other problems caused by physical contact, prolong the service life of switch button.

Description

Technical Field

[0001] This utility model relates to the field of keyboard button switch technology, and in particular to a magnetic shaft button switch. Background Technology

[0002] Currently, traditional mechanical keyboard switches exhibit several inherent defects after long-term use, severely limiting the overall lifespan and performance stability of the keyboard. The core problem lies in their reliance on physical metal contacts for switching mechanisms. Each key press requires the internal metal springs to mechanically contact and separate to trigger a signal. This physical process inevitably involves mechanical wear, metal oxidation, and contact contamination, resulting in a generally limited key lifespan. More importantly, their performance stability significantly decreases with prolonged use. Metal contacts are prone to poor contact due to arc erosion and oxidation, leading to signal jitter, repeated clicks, or no response. Simultaneously, the mechanical structure is susceptible to interference from dust and moisture in the environment, further exacerbating reliability issues. Therefore, a non-contact, highly stable switch structure is urgently needed. Utility Model Content

[0003] In view of the shortcomings in the prior art, this utility model provides a magnetic shaft push button switch and overcomes the above-mentioned defects.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a magnetic shaft push button switch, including a base, a button and a top cover. The top cover is fastened to the base. An elastic element is provided between the button and the base. A circuit board is provided inside the base. A magnetic sensor is provided on the circuit board. A magnet is provided on the side of the button. The button moves up and down relative to the base by pressing it. The circuit board is electrically connected to a terminal block. The end of the terminal block away from the circuit board passes through the base.

[0005] The magnetic sensor is a TMR element.

[0006] The TMR element is located on the lower surface of the circuit board.

[0007] The elastic element is a compression elastic element.

[0008] When the button is in the reset state under the force of the elastic element, the bottom of the magnet is flush with the bottom of the magnetic sensor, and the distance between the magnet and the center of the magnetic sensor is 2-3 mm. Preferably, the distance between the magnet and the center of the magnetic sensor is 2.5 mm.

[0009] A connecting block is provided between the circuit board and the base, and the wiring terminals are set through the connecting block, and the circuit board is fixedly connected to the connecting block.

[0010] The button has guide ribs and protrusions on its side. The protrusions have receiving grooves for placing magnets, and the side walls of the receiving grooves have reinforcing ribs.

[0011] Both the circuit board and the connecting block are provided with clearance space, and the protrusions correspond to the clearance space.

[0012] The terminal block has barbs on its side and holes on the connecting block for the terminal block to pass through, with the barbs placed inside the holes.

[0013] By adopting the above technical solution, the fundamental defects of existing physical contacts in push-button switches are effectively improved. Through the principle of non-contact magnetic induction, signal changes are generated by the relative displacement of the magnet and the TMR element, thereby achieving contactless signal triggering. This completely solves the problems of mechanical wear, metal oxidation, and contact contamination caused by physical contact, extending the service life of the switch buttons. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 A schematic diagram of the split structure.

[0016] Figure 3 This is a schematic diagram showing the disassembled structure of the magnet and the button.

[0017] Figure 4 This is a structural diagram of the button, connecting block, and circuit board.

[0018] Figure 5 This is a schematic diagram showing the disassembled structure of the circuit board, connector block, and terminal block.

[0019] Figure 6 This is a schematic diagram showing the installation and use of this utility model. Detailed Implementation

[0020] refer to Figure 1-6 As can be seen, this utility model discloses a magnetic shaft push button switch, including a base 1, a button 2 and a top cover 3. The top cover 3 is fastened to the base 1. An elastic element 4 is provided between the button 2 and the base 1. A circuit board 5 is provided inside the base 1. A magnetic sensor 51 is provided on the circuit board 5. A magnet 6 is provided on the side of the button 2. The button 2 moves the magnet 6 up and down by pressing it relative to the base 1. The circuit board 5 is electrically connected to a terminal block 7. The end of the terminal block 7 away from the circuit board 5 passes through the base 1.

[0021] The magnetic sensor 51 is a TMR element, which is a high-sensitivity magnetic sensor.

[0022] As attached Figure 2 , 5 As shown, the TMR element is located on the lower surface of circuit board 5. This arrangement facilitates a compact overall structure design and reduces the overall height of the switch.

[0023] As attached Figure 2 As shown, the elastic element 4 is a compression elastic element. The compression elastic element ensures that when the switch is in the reset state, i.e., when button 2 is reset by the force of the elastic element 4, the bottom of magnet 6 is flush with the bottom of magnetic sensor 51, and the distance between magnet 6 and the center of magnetic sensor 51 is 2-3mm. After multiple experiments and calculations by the R&D personnel, the optimal data was finally obtained, namely, the distance between magnet 6 and the center of magnetic sensor 51 is 2.5mm. This specific distance can achieve precise and stable triggering, effectively avoiding problems such as false triggering or insufficient sensitivity.

[0024] As attached Figure 4-5 As shown, a connecting block 8 is provided between the circuit board 5 and the base 1, and the wiring terminal 7 is disposed through the connecting block 8, thus fixing the circuit board 5 and the connecting block 8. The connecting block 8 serves to support and position the circuit board 5 and the wiring terminal 7, ensuring the stability of the circuit board 5 installation and preventing displacement of the circuit board 5 due to vibration or repeated pressing, thereby ensuring the long-term accuracy of the relative position of the magnet 6 and the TMR component. At the same time, this structure facilitates assembly and improves production efficiency.

[0025] As attached Figure 3 As shown, the button 2 has a guide rib 21 and a protrusion 22 on its side. The protrusion 22 has a receiving groove 23 for placing the magnet 6, and the side wall of the receiving groove 23 has a reinforcing rib 24. The guide rib 21 corresponds to the guide groove on the base 1, which can ensure that the button 2 moves smoothly in the vertical direction during pressing, preventing jamming or shaking, and improving the smoothness and consistency of the pressing feel. The receiving groove 23 with reinforcing rib 24 provides a solid and accurate installation position for the magnet 6, preventing the magnet 6 from loosening or shifting during frequent operation, and ensuring the stability of the magnetic field and the reliability of triggering.

[0026] As attached Figure 4 As shown, both the circuit board 5 and the connecting block 8 are provided with clearance space 50. The protrusion 22 corresponds to the clearance space 50, ensuring the lateral distance between the magnet 6 and the TMR element. The overall structure is compact and makes full use of space.

[0027] As attached Figure 5 As shown, the terminal 7 has barbs 71 on its side, and the connecting block 8 has holes 81 for the terminal 7 to pass through. The barbs 71 are placed inside the holes 81. The mating design of the barbs 71 and the holes 81 ensures the secure fixing of the terminal 7, effectively resists the reaction force caused by insertion and removal, prevents the terminal 7 from retracting or loosening, improves the long-term reliability of the electrical connection, and reduces the risk of switch failure due to connection problems.

[0028] As attached Figure 6 As shown, the top cover 3 is fixedly connected to the mounting plate 10 on the keyboard, and the external circuit board 20 is connected to the terminal block 7. (See attached diagram.) Figure 2 Appendix Figure 4 As shown, pressing button 2 causes magnet 6 to move up and down. The relative distance between magnet 6 and magnetic sensor 51 (TMR element) enables contactless opening and closing of the switch.

[0029] This invention effectively improves upon the fundamental defects of existing physical contacts in push-button switches. Utilizing a non-contact magnetic induction principle, it generates signal changes through the relative displacement of the magnet 6 and the TMR element, thereby achieving contactless signal triggering. Combined with optimal distance settings, it completely solves problems such as mechanical wear, metal oxidation, and contact contamination caused by physical contact, extending the lifespan of the switch button.

[0030] Obviously, the above embodiments are merely illustrative examples for clarity and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A magnetic shaft push-button switch, comprising a base, a button, and a top cover, wherein the top cover is fastened to the base, characterized in that: An elastic element is provided between the button and the base. A circuit board is provided inside the base. A magnetic sensor is provided on the circuit board. A magnet is provided on the side of the button. The button moves up and down by pressing it relative to the base. The circuit board is electrically connected to a terminal block. The end of the terminal block away from the circuit board passes through the base. The magnetic sensor is a TMR element, which is located on the lower surface of the circuit board; A connecting block is provided between the circuit board and the base, and the wiring terminals are set through the connecting block, and the circuit board is fixedly connected to the connecting block. The button has guide ribs and protrusions on its side. The protrusions have receiving grooves for placing magnets, and the side walls of the receiving grooves have reinforcing ribs. Both the circuit board and the connecting block are provided with clearance space, and the protrusions correspond to the clearance space.

2. The magnetic shaft push-button switch according to claim 1, characterized in that: The elastic element is a compression elastic element.

3. The magnetic shaft push-button switch according to claim 1, characterized in that: When the button is in the reset state under the force of the elastic element, the bottom of the magnet is flush with the bottom of the magnetic sensor, and the distance between the magnet and the center of the magnetic sensor is 2-3mm.

4. The magnetic shaft push-button switch according to claim 1, characterized in that: The distance from the magnet to the center of the magnetic sensor is 2.5 mm.

5. The magnetic shaft push-button switch according to claim 1, characterized in that: The terminal block has barbs on its side and holes on the connecting block for the terminal block to pass through, with the barbs placed inside the holes.

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