A shaft structure for a keyboard key

Abstract

The application relates to the technical field of keyboard keys, in particular to a shaft structure for keyboard keys, which comprises a shaft cover, a shaft core, a spring, a magnet and a shaft seat, the shaft cover is arranged on the top end of the shaft core, the bottom end of the shaft core is in plug-in fit with the shaft seat, the spring is connected between the shaft core and the shaft seat, the magnet is arranged in the shaft seat, the plug-in section of the shaft core and the shaft seat is provided with a spiral groove, the magnet is provided with a bump with a width matched with the pitch of the spiral groove, the bump slides in the spiral groove, the shaft core rotates clockwise to drive the magnet to move downward, the shaft core rotates counterclockwise to drive the magnet to move upward, when a user rotates the shaft cover, the spiral groove drives the shaft core to rotate, the magnet generates vertical displacement, a hall sensor on the keyboard detects the change of the magnetic field and transmits a signal to a PCB board, the rotation input function of the key is realized, and the application has the characteristics of improving operation efficiency.

Description

Technical Field

[0001] This application relates to the technical field, and in particular to a key shaft structure for keyboard keys. Background Technology

[0002] As the most commonly used and primary input device, the keyboard is mainly used to operate the computer by typing commands and data. The performance of its core component, the keyboard switch, is directly related to the user experience.

[0003] In related technologies, the current mainstream keyboard keys are composed of a switch cover, a switch core, a spring, a moving and stationary plate, and a switch seat, which are installed in a linear structure. The single character input function is achieved by the up and down movement of the switch core and the elastic deformation of the spring. As users' demand for operating efficiency increases, the simple structure of the keyboard switch can no longer meet the need for convenient switching between different function outputs.

[0004] The existing keyboard switch structure has the following problems: the structure is simple and cannot endow a single key with multiple functions through hardware structure, which makes users need to memorize the complex layout of the keyboard and frequently switch key inputs, thereby reducing operating efficiency. Utility Model Content

[0005] To improve operational efficiency, this application provides a key axis structure for keyboard buttons.

[0006] The keyboard key switch structure provided in this application adopts the following technical solution: A keyboard key switch structure includes a switch cover, a switch core, a spring, a magnet, and a switch seat. The switch cover is disposed on the top of the switch core, the bottom end of the switch core is inserted into the switch seat, the spring is connected between the switch core and the switch seat, the magnet is built into the switch seat, the insertion section of the switch core and the switch seat is provided with a helical groove, and the magnet is provided with a protrusion of a width adapted to the pitch of the helical groove, the protrusion sliding in the helical groove.

[0007] By adopting the above technical solution, a hardware foundation is provided for the rotation input function of keyboard keys. When the user rotates the shaft cover, it drives the shaft core to rotate. The protrusion slides along the spiral groove trajectory, converting the rotational motion into the vertical displacement of the magnet. This causes the Hall sensor integrated in the keyboard key to sense the change in magnetic field strength and send corresponding instructions to the PCB board. Users can customize the rotation operation of the keys to give them functions such as volume increase and decrease, thus improving operating efficiency.

[0008] Preferably, the magnet is composed of three cylindrical magnets connected laterally, and four springs are provided and fixed to the upper and lower ends of the magnets on both sides of the magnet. The bearing seat has matching grooves corresponding to the shaft core, the magnet and the springs.

[0009] By adopting the above technical solution, the springs on both sides form symmetrical elastic support, improving vibration resistance and durability.

[0010] Preferably, the shaft rotates clockwise to drive the magnet downward, and the shaft rotates counterclockwise to drive the magnet upward. After the protrusion has traveled its maximum stroke in the spiral groove, it is reset to the middle of the spiral groove under the action of the spring.

[0011] By adopting the above technical solution, when the protrusion is in the middle of the spiral groove, the spring preload and the geometric constraint of the spiral groove form a mechanical equilibrium point, allowing the protrusion to remain stationary and perform symmetrical up and down strokes. Preferably, the maximum upward or downward stroke of the protrusion in the spiral groove is 2 mm.

[0012] By adopting the above technical solutions, the triggering accuracy is improved and the risk of accidental activation caused by excessively short travel is reduced.

[0013] Preferably, the portion of the groove near the central magnet of the magnet is provided with multiple arc-shaped limiting protrusions.

[0014] By adopting the above technical solution, the arc-shaped limiting protrusion forms multi-point contact with the side wall of the magnet, which can limit its lateral displacement under vibration or impact.

[0015] Preferably, the cross-sectional diameter of the shaft core is the same as that of a universal magnetic shaft.

[0016] By adopting the above technical solution, users can directly replace it with a common linear shaft structure, improving flexibility and adaptability.

[0017] Preferably, a plastic roller abuts between the shaft cover and the shaft core.

[0018] By adopting the above technical solutions, the abnormal noise and mechanical wear caused by direct collisions between metal materials can be reduced.

[0019] Preferably, the bearing seat has a built-in damping spring.

[0020] By adopting the above technical solution, the instantaneous impact on the bearing seat is absorbed and attenuated, thus providing protection.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. It provides the hardware foundation for the rotation input function of keyboard keys. When the user rotates the shaft cover, it drives the shaft core to rotate. The protrusion slides along the spiral groove trajectory, converting the rotational motion into the vertical displacement of the magnet. This allows the Hall sensor integrated in the keyboard key to sense the change in magnetic field strength and send corresponding instructions to the PCB board. Users can customize the rotation operation of the keys to give them functions such as volume increase and decrease, thus improving operating efficiency. 2. Improved the operating accuracy of the device and reduced accidental activation; 3. It improves the flexibility and adaptability of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0023] Figure 2 This is an exploded structural diagram of an embodiment of this application.

[0024] Figure 3 This is a schematic diagram of the fit between the shaft and the magnet in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the overall structure of the bearing in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Shaft cover; 2. Shaft core; 21. Spiral groove; 3. Magnet; 31. Protrusion; 4. Spring; 5. Shaft seat; 51. Groove; 52. Arc-shaped limiting protrusion; 6. Plastic roller; 7. Damping spring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] This application discloses a key shaft structure for a keyboard. (Refer to...) Figure 1-3 A keyboard key switch structure includes a switch cover 1, a switch core 2, a spring 4, a magnet 3, and a switch seat 5. The switch cover 1 is placed on the top of the switch core 2, the bottom of the switch core 2 is inserted into the switch seat 5, the spring 4 is connected between the switch core 2 and the switch seat 5, and the magnet 3 is built into the switch seat 5.

[0029] Furthermore, the insertion section between the shaft core 2 and the shaft seat 5 is provided with a spiral groove 21. The magnet 3 is provided with a protrusion 31 of a width that matches the pitch of the spiral groove 21. The protrusion 31 slides in the spiral groove 21. When the shaft core 2 rotates clockwise, it drives the magnet 3 to move downward. When the shaft core 2 rotates counterclockwise, it drives the magnet 3 to move upward.

[0030] Therefore, when the user rotates the shaft cover 1, it drives the shaft core 2 to rotate. The protrusion 31 slides along the trajectory of the spiral groove 21, converting the rotational motion into the vertical displacement of the magnet 3. It is limited by the physical boundary of the spiral groove 21 and ensures the stability of the motion trajectory through the guiding effect of the spiral groove 21. At the same time, it eliminates the problem of contact oxidation of metal moving and stationary pieces in traditional shaft structures and extends the life of the shaft.

[0031] Furthermore, the keyboard keys integrate Hall sensors, which detect changes in the magnetic field strength of magnet 3 and output analog signals corresponding to the displacement of magnet 3. These signals are converted into digital instructions by the signal conditioning circuit on the PCB board, ultimately achieving accurate transmission of key trigger signals.

[0032] Correspondingly, when the shaft core 2 rotates clockwise, the spiral groove 21 pushes the magnet 3 to move downward along the axis, and the Hall sensor detects the change in magnetic field strength and outputs the corresponding displacement signal to the PCB board; when the shaft core 2 rotates counterclockwise, the spiral groove 21 pushes the magnet 3 to move upward along the axis, and the Hall sensor captures the change in magnetic field again and completes the signal feedback. The spring 4 reduces bottoming noise and optimizes the user's feel through elastic deformation.

[0033] In summary, this structural design provides the hardware foundation for the rotation input function of keyboard keys. Users can customize the rotation operation of the keys to give them functions such as volume increase / decrease, page up / down, or brightness adjustment, effectively improving operating efficiency.

[0034] Specifically, magnet 3 is composed of three cylindrical magnets connected laterally to form a superimposed magnetic field region to improve the uniformity of the magnetic field. There are four springs 4, which are fixed to the upper and lower ends of the magnets on both sides of magnet 3 to form symmetrical elastic support, which shortens the reset response time. The compression stroke of spring 4 is synchronized with the displacement of magnet 3, which can provide progressive damping at the trigger end point to reduce the bottoming impact force and noise.

[0035] Furthermore, the bearing seat 5 has matching grooves 51 for the shaft core 2, magnet 3 and spring 4. By radially limiting the magnet 3 and spring 4, the trajectory of the magnetic field change is ensured to remain perpendicular to the Hall sensor, thereby improving the triggering accuracy.

[0036] Specifically, after the protrusion 31 completes its maximum upward or downward stroke in the spiral groove 21, it is reset to the middle of the spiral groove 21 under the action of the spring 4. The maximum upward or downward stroke of the protrusion 31 is 2mm, that is, the total stroke is 4mm.

[0037] Correspondingly, when the protrusion 31 is in the middle of the spiral groove 21, the preload of the spring 4 and the geometric constraint of the spiral groove 21 form a mechanical balance point, ensuring that the system remains stationary without external interference, reducing malfunctions caused by vibration or impact. At the same time, the protrusion 31 can symmetrically perform the up and down strokes, improving the consistency of the displacement amount of each action.

[0038] Furthermore, a 2mm travel distance can achieve a trigger accuracy of 0.1mm in the keyboard, while reducing the risk of accidental touches caused by excessively short travel distance, and combining trigger speed, accuracy and anti-interference ability.

[0039] On the other hand, refer to Figure 4The groove 51 extends from the middle magnet of the magnet 3 and is provided with multiple arc-shaped limiting protrusions 52. The arc-shaped limiting protrusions 52 form multi-point contact with the side wall of the magnet 3, which can limit its lateral displacement under vibration or impact, ensure that the magnet 3 maintains axial alignment when moving up and down, reduce magnetic field coupling interference, and reduce the friction coefficient through smooth arc transition, thereby reducing the lifting resistance of the magnet 3.

[0040] In addition, the cross-sectional diameter of the shaft core 2 is the same as that of the universal magnetic shaft, which ensures its compatibility with existing linkage components. This allows users to directly replace it with a common linear shaft structure according to their personal preferences, improving flexibility, adaptability, and user experience, while reducing replacement costs.

[0041] On the other hand, a plastic roller 6 is abutted between the shaft cover 1 and the shaft core 2. The plastic roller 6 acts as an intermediate medium, absorbing the vibration energy of the shaft core 2 during rotation through elastic deformation, and suppressing the transmission of high-frequency vibration, reducing abnormal noise and mechanical wear caused by direct collision between metals. The roller also forms a dynamic sealing interface with the shaft cover 1, reducing the risk of dust particles intruding.

[0042] Meanwhile, the bearing seat 5 has a built-in damping spring 7. When the bearing seat 5 is subjected to instantaneous impact, the damping spring 7 provides progressive buffering through nonlinear stiffness characteristics, enabling the system to quickly return to a stable state and reducing the accuracy loss caused by rigid collision. Its frictional damping with the internal contact surface of the bearing seat 5 can also reduce high-frequency howling and suppress secondary noise radiation caused by vibration.

[0043] The implementation principle of the keyboard key shaft structure in this application embodiment is as follows: This structure design provides the hardware foundation for the rotation input function of the keyboard keys. When the user rotates the shaft cover 1, it drives the shaft core 2 to rotate, causing the protrusion 31 to slide along the trajectory of the spiral groove 21, and converting the rotational motion into the vertical displacement of the magnet 3. After the Hall sensor in the keyboard key senses the change in magnetic field strength, it sends a corresponding instruction to the PCB board to realize the accurate transmission of the key trigger signal. After the magnet 3 reaches its maximum stroke, the shaft cover 1 continues to rotate, so that the protrusion 31 instantly returns to the middle of the spiral groove 21 under the action of the spring 4. The continuous rotation of the shaft cover 1 will continuously trigger the repeated execution of the above actions. The user can customize the key mapping and give the rotation operation of the key specific functions such as volume increase / decrease, brightness adjustment, or page up / down, effectively improving the operation efficiency.

[0044] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A key shaft structure for a keyboard, characterized in that, The assembly includes a shaft cover (1), a shaft core (2), a spring (4), a magnet (3), and a shaft seat (5). The shaft cover (1) is placed on the top of the shaft core (2). The bottom of the shaft core (2) is inserted into the shaft seat (5). The spring (4) is connected between the shaft core (2) and the shaft seat (5). The magnet (3) is built into the shaft seat (5). The insertion section between the shaft core (2) and the shaft seat (5) is provided with a spiral groove (21). The magnet (3) is provided with a protrusion (31) of a width that matches the pitch of the spiral groove (21). The protrusion (31) slides in the spiral groove (21).

2. The key shaft structure for a keyboard according to claim 1, characterized in that, The magnet (3) is composed of three cylindrical magnets connected laterally. There are four springs (4) which are fixed to the upper and lower ends of the magnets on both sides of the magnet (3). The bearing seat (5) has a matching groove (51) corresponding to the shaft core (2), the magnet (3) and the spring (4).

3. The key shaft structure for a keyboard according to claim 2, characterized in that, The shaft (2) rotates clockwise, causing the magnet (3) to move downwards. The shaft (2) rotates counterclockwise, causing the magnet (3) to move upwards. After the protrusion (31) has traveled its maximum stroke in the spiral groove (21), it is reset to the middle of the spiral groove (21) under the action of the spring (4).

4. The key shaft structure for a keyboard according to claim 3, characterized in that, The maximum upward or downward stroke of the protrusion (31) in the spiral groove (21) is 2 mm.

5. The key shaft structure for a keyboard according to claim 3, characterized in that, The groove (51) near the middle magnet of the magnet (3) is provided with a plurality of arc-shaped limiting protrusions (52).

6. The key shaft structure for a keyboard according to claim 1, characterized in that, The cross-sectional diameter of the core (2) is the same as that of the universal magnetic shaft.

7. The key shaft structure for a keyboard according to claim 1, characterized in that, A plastic roller (6) abuts between the shaft cover (1) and the shaft core (2).

8. The key shaft structure for a keyboard according to claim 1, characterized in that, The bearing seat (5) has a built-in damping spring (7).

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