A thin magnetic type torsion spring magnetic induction key structure
By combining a torsion spring structure and a Hall sensor, the problems of large thickness and fixed key travel in traditional mechanical keyboards are solved, achieving a compact design and personalized key experience for thin keyboards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- G TECH TECH
- Filing Date
- 2022-11-01
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional mechanical keyboards are thick, have a fixed key travel that is difficult to adjust, resulting in inconvenience in carrying them and a poor user experience.
It adopts a torsion spring structure design, combined with a Hall sensor, and achieves the tactile feedback and click feedback of the key through the cooperation of magnetic components and torsion spring, and uses the Hall sensor to adjust the key conduction travel.
It achieves a compact structure and personalized key experience in a slim keyboard, with tactile feedback and adjustable key travel according to user needs.
Smart Images
Figure CN115910653B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of magnetic induction keyboards, and particularly to a thin magnetic torsion spring magnetic induction key structure. Background Technology
[0002] With the continuous development of information technology, keyboards have become a typical input device for electronic products such as computers, laptops, and mobile phones. Traditional mechanical keyboards are widely praised by users for their long key lifespan and good tactile feel. However, the switch structure of traditional mechanical keyboards is relatively tall, about 18mm. This makes the entire keyboard too thick, inconvenient for users to carry around, and unsuitable for use on laptops. In addition, the actuation distance of traditional mechanical keyboard keys is often fixed when pressed, and cannot be adjusted according to the user's needs and preferences.
[0003] For example, a high-stroke ultra-thin key switch disclosed in CN107591269A includes a base, a keycap, and a guide core assembly disposed between the keycap and the base. The guide core assembly includes an outer guide core and an inner guide core. The outer guide core includes a pressing protrusion and an outer retaining edge protruding outward from the edge of the pressing protrusion. A small through hole is formed on the pressing protrusion. The inner guide core includes a pressing protrusion extending from bottom to top through the small through hole and an inner retaining edge protruding outward from the edge of the pressing protrusion and retaining itself below the pressing protrusion. When the keycap is pressed down, the inner guide core moves down onto the pressing protrusion. The end face is flush with the upper end face of the pressing protrusion of the outer guide core, obtaining the initial pressing stroke generated by the inner guide core. Continuing to press causes the outer and inner guide cores to move down together, obtaining the subsequent pressing stroke generated by the outer and inner guide cores, thus achieving a high total pressing stroke. This structure uses a combination of outer and inner guide cores as a guide core assembly, creating a tactile feedback when pressing for a better user experience. This structure uses the guide core assembly and base structure for fixed installation, and the control switch is disconnected by contact between the moving and fixed plates. However, installation and disassembly are relatively inconvenient, and it is difficult to adjust according to user needs. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a thin magnetic torsion spring magnetic induction button structure with a simple and compact structure and a tactile feedback and a tactile sound when pressed.
[0005] The technical solution adopted in this invention is as follows: This invention includes a circuit board, a keycap, a scissor-switch assembly, a base, a magnetic component, a Hall sensor, and a torsion spring. The Hall sensor and the base are both disposed on the circuit board. The base has a recessed groove adapted to the Hall sensor. One end of the scissor-switch assembly is movably connected to the base, and the other end of the scissor-switch assembly is rotatably connected to the keycap. The magnetic component is disposed on the scissor-switch assembly and adapted to the Hall sensor. The torsion spring has a first fulcrum, a second fulcrum, and a third fulcrum. The first fulcrum is in contact with the keycap, the second fulcrum is in contact with the magnetic component, and the third fulcrum is in contact with the circuit board.
[0006] Furthermore, the scissor-switch assembly includes an outer bracket and an inner bracket. The outer bracket has a central shaft hole, and the inner bracket has a central shaft. The central shaft hole is movably connected to the central shaft. The inner bracket and the outer bracket are each provided with a first fixing post at the end connected to the keycap. The inner bracket and the outer bracket are each provided with a fixing shaft at the end connected to the base.
[0007] Furthermore, the inner support is provided with a slot that cooperates with the magnetic component, and the slot is provided with a limiting rib and a limiting buckle that cooperate with the limiting of the magnetic component.
[0008] Furthermore, the base is provided with a first buckle and a second buckle. The first buckle is located on the outside of the base and rotates with the outer bracket, while the second buckle is located on the inside of the base and engages with the inner bracket.
[0009] Furthermore, the keycap is provided with a rotating latch, a sliding latch, and a boss. The rotating latch and the sliding latch are both movably connected to the scissor-switch assembly. The boss is located in the middle of the keycap and has a positioning groove that engages with the first fulcrum.
[0010] Furthermore, several of the rotating latches and several of the sliding latches are all arranged along the edge of the keycap.
[0011] Furthermore, the openings of some of the rotating buckles are vertically upward, while the openings of some of the sliding buckles are opposite to each other.
[0012] Furthermore, the torsion spring is also provided with a torsion spring coil, with the first fulcrum and the torsion spring coil forming a first lever arm, and the third fulcrum and the torsion spring coil forming a second lever arm.
[0013] Furthermore, the torsion spring also includes a fourth fulcrum, a first torsion spring coil, and a second torsion spring coil. The first torsion spring coil and the second torsion spring coil are connected by a second lever arm, and the fourth fulcrum is press-fitted with the keycap.
[0014] The beneficial effects of this invention are as follows: Because this invention adopts a torsion spring structure design, it provides support between the keycap and the circuit board, so that the key is in the lifted state under normal circumstances. When the second fulcrum is pressed, it makes rigid contact with the circuit board or the base, producing vibration feedback and sound. The overall structure is simple and compact, and it has a good tactile feedback and mechanical feedback sound when used, which improves the user experience. At the same time, users can adjust the conduction stroke of the key according to their usage habits and needs by capturing the magnetic field strength by the Hall sensor, so as to realize personalized needs. Attached Figure Description
[0015] Figure 1 This is an exploded view of the present invention;
[0016] Figure 2 This is a schematic diagram of the keycap structure of the present invention;
[0017] Figure 3 This is a schematic diagram of the internal support structure of the present invention;
[0018] Figure 4 This is a schematic diagram of the structure of the external support of the present invention;
[0019] Figure 5 This is a schematic diagram of the torsion spring of the present invention;
[0020] Figure 6 This is a schematic diagram of the structure of the base of the present invention;
[0021] Figure 7 This is a schematic diagram of the structure in the normal state of Embodiment 1 of the present invention;
[0022] Figure 8 This is a schematic diagram of the structure in the pressing state according to Embodiment 1 of the present invention;
[0023] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention;
[0024] Figure 10 This is a schematic diagram of the double torsion spring structure of the present invention. Detailed Implementation
[0025] like Figures 1 to 10As shown, in this embodiment, the present invention includes a circuit board 1, a keycap 2, a scissor-switch assembly 3, a base 4, a magnetic component 5, a Hall sensor 6, and a torsion spring 7. The Hall sensor 6 and the base 4 are both mounted on the circuit board 1. The base 4 has a recessed groove adapted to the Hall sensor 6. One end of the scissor-switch assembly 3 is movably connected to the base 4, and the other end is rotatably connected to the keycap 2. The magnetic component 5 is mounted on the scissor-switch assembly 3 and adapted to the Hall sensor 6. The torsion spring 7 has a first fulcrum 71, a second fulcrum 72, and a third fulcrum 73. The first fulcrum 71 presses against the keycap 2, the second fulcrum 72 magnetically engages with the magnetic component 5, and the third fulcrum 73 presses against the circuit board 1. The magnetic component 5 is a permanent magnet, and the torsion spring 7 is a metal material that can be attracted by the magnetic component 5. The Hall sensor is... The keycap 2 is placed on the upper or lower surface of the circuit board 1. Under normal conditions, the first fulcrum 71 of the torsion spring 7 supports the bottom of the keycap 2, and the third fulcrum 73 of the torsion spring 7 supports the base 4 or the circuit board 1. The magnetic component 5 attracts the second fulcrum 72, so that the second fulcrum 72 is close to the end of the magnetic component 5. The magnetic component 5 is far from the Hall sensor 6 and receives a weak magnetic field, so it is in an open state. When the keycap 2 is pressed down, the first fulcrum 71 moves downward and the torsion spring 7 coils and contracts. The first fulcrum 71 rotates along the torsion spring 7. The second fulcrum 72 is attracted by the magnetic component 5 and does not move immediately. When the downward pressure is greater than the attraction force of the magnetic component 5, the second fulcrum 72 moves downward immediately under the action of downward pressure and elasticity. The second fulcrum 72 makes rigid contact with the base 4 or the circuit board 1, giving the user vibration and sound feedback. As the distance between the magnetic component 5 and the Hall sensor 6 shortens, the Hall sensor 6 receives an enhanced magnetic field. When the magnetic field strength reaches a preset value, it sends a conduction feedback. The design employs a torsion spring 7 structure, which provides support between the keycap 2 and the circuit board 1. Under normal circumstances, the key is in a raised position. When pressed, the second fulcrum 72 makes rigid contact with the circuit board 1 or the base 4, producing vibration feedback and sound. The overall structure is simple and compact, providing a good tactile feedback and mechanical sound during use, thus enhancing the user experience. At the same time, the torsion spring 7 structure and the Hall sensor 6 are adjustable, allowing the magnetic field capture and transformation of the Hall sensor 6 to be adjusted according to usage habits, making it convenient and adaptable.
[0026] In this embodiment, the scissor-switch assembly 3 includes an outer bracket 31 and an inner bracket 32. The outer bracket 31 has a central shaft hole 311, and the inner bracket 32 has a central shaft 321. The central shaft hole 311 is movably connected to the central shaft 321. The ends of the inner bracket 32 and the outer bracket 31 that are connected to the keycap 2 are each provided with a first fixing post. The ends of the inner bracket 32 and the outer bracket 31 that are connected to the base 4 are each provided with a fixing shaft. The central shaft hole 311 has a bevel. When the central shaft 321 is installed, it is guided along the bevel into the central shaft hole 311. The first fixing post and the fixing shaft are both cylindrical.
[0027] In this embodiment, the inner support 32 is provided with a slot that cooperates with the magnetic component 5. The slot contains limiting ribs 322 and limiting buckles 323 that limit the magnetic component 5. The limiting ribs 322 are triangular structures that support the four corners of the magnetic component 5. The limiting buckles 323 are symmetrically arranged at the opening of the slot and are protruding structures with guide surfaces. The slot also has a notch. When the magnetic component 5 is inserted, it is pressed in along the guide surface, and the slot opens along the notch, allowing the magnetic component 5 to smoothly enter the slot. The limiting ribs 322 support the magnetic component 5, fixing it in place. Using the limiting ribs 322 and limiting buckles 323 to fix the magnetic component 5 in the inner support 32 is simple, convenient, and efficient for installing and removing the magnetic component 5. After installation, it is not easily detached and has good applicability.
[0028] In this embodiment, the base 4 is provided with a first buckle 41 and a second buckle 42. The first buckle 41 is disposed on the outer side of the base 4 and rotates with the outer bracket 31. The second buckle 42 is disposed on the inner side of the base 4 and engages with the inner bracket 32.
[0029] In this embodiment, the keycap 2 is provided with a rotating latch 21, a sliding latch 22, and a boss 23. The rotating latch 21 and the sliding latch 22 are both movably connected to the scissor-switch assembly 3. The boss 23 is located in the middle of the keycap 2. The boss 23 is provided with a positioning groove and engages with the first fulcrum 71. The rotating latch 21 and the sliding latch 22 are used to fix the keycap 2 and balance the movement during lifting and lowering. The structure is simple and easy to use, and has good applicability. The boss 23 structure provides support for the first fulcrum 71. The force output during the pressing process is stable and effective, effectively avoiding slippage and poor contact.
[0030] In this embodiment, several of the rotating latches 21 and several of the sliding latches 22 are arranged along the edge of the keycap 2.
[0031] In this embodiment, the opening direction of the plurality of rotating buckles 21 is vertically upward, and the opening direction of the plurality of sliding buckles 22 is opposite.
[0032] In this embodiment, the torsion spring 7 is further provided with a torsion spring coil. The first lever arm is between the first fulcrum 71 and the torsion spring coil, and the second lever arm is between the third fulcrum 73 and the torsion spring coil. The angle between the first lever arm and the second lever arm is 15 degrees to 60 degrees or 90 degrees to 165 degrees. When the angle between the first lever arm and the second lever arm is 15 degrees to 60 degrees, it is an acute angle structure. The third lever arm is between the second fulcrum 72 and the first fulcrum 71, and the angle between the third lever arm and the first lever arm is 90 degrees to 160 degrees.
[0033] like Figures 9 to 10 As shown, in this embodiment, the torsion spring 7 further includes a fourth fulcrum 74, a first torsion spring coil 75, and a second torsion spring coil 76. The first torsion spring coil 75 and the second torsion spring coil 76 are connected by a second lever arm. The fourth fulcrum 74 presses against the keycap, supporting the keycap 2. A 0.2-1.0mm gap exists between the first fulcrum 71 and the keycap 2, which can extend the tactile feedback time of the keystrokes, thus providing different key feel options suitable for users with different tactile preferences. The fourth fulcrum 74 rests against the bottom of the keycap 2, providing support and stability. In its natural state, this helps prevent the keycap 2 from shaking and making abnormal noises.
[0034] Working principle of the invention:
[0035] Example 1
[0036] In its natural state, the first and second lever arms on the torsion spring 7 form an acute angle of 15 to 90 degrees. The third fulcrum 73 is supported on the surface of the circuit board 1 or the surface of the base 4. The first fulcrum 71 on the torsion spring 7 is supported on the bottom of the keycap 2 or the boss 23, lifting the keycap 2. The magnetic component 5 is attracted by the magnetic force, causing the second fulcrum 72 to stick tightly. The magnetic component 5 is far away from the Hall sensor 6, and the magnetic field detected by the Hall sensor 6 is weak, so it is in the disconnected state.
[0037] When keycap 2 is pressed, keycap 2 moves vertically downwards. The first fulcrum 71 of torsion spring 7 moves downwards along with keycap 2. The first lever arm rotates around torsion spring 7. The radius of motion of the second fulcrum 72 is greater than that of the first fulcrum 71. When the first fulcrum 71 begins to press down, the second fulcrum 72 is not affected by the magnetic attraction of magnetic component 5 and does not move downwards with the press. When the elastic deformation caused by the press is greater than the attraction of magnetic component 5, the second fulcrum 72 is released from the influence of magnetic component 5 and moves downwards quickly. As the second fulcrum 72 is released, the support force of the first fulcrum 71 decreases and moves downwards, forming a pressing tactile feedback. The second fulcrum 72 falls quickly and strikes the surface of circuit board 1 or base 4, giving the user mechanical sound and mechanical vibration feedback of pressing operation.
[0038] Example 2
[0039] To cater to the different needs of various users regarding the feel of the device, implementation plan 1 will be further improved:
[0040] The original single torsion spring structure was changed to a double torsion spring structure. The double torsion spring has a first torsion spring coil 75 and a second torsion spring coil 76. The other end of the second torsion spring coil 76 is connected to the first torsion spring coil 75 via a second lever arm. The first fulcrum 71 maintains a certain distance D from the protrusion of the keycap 2, which can extend the tactile trigger time of the key, thus obtaining different key feel to suit users with different feel requirements. The fourth fulcrum 74 rests against the bottom of the keycap 2, supporting the keycap 2 and providing it with a certain support force. In its natural state, this effectively reduces the wobble and abnormal noise of the keycap 2.
[0041] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.
Claims
1. A thin magnetic torsion spring magnetic induction key structure, comprising a circuit board (1), a keycap (2), a scissor-switch assembly (3), a base (4), a magnetic component (5), and a Hall sensor (6), wherein the Hall sensor (6) and the base (4) are both disposed on the circuit board (1), the base (4) is provided with a recessed groove adapted to the Hall sensor (6), one end of the scissor-switch assembly (3) is movably connected to the base (4), the other end of the scissor-switch assembly (3) is rotatably connected to the keycap (2), and the magnetic component (5) is disposed on the scissor-switch assembly (3) and adapted to the Hall sensor (6), characterized in that: The thin magnetic torsion spring magnetic induction key structure also includes a torsion spring (7), which is provided with a first fulcrum (71), a second fulcrum (72) and a third fulcrum (73). The first fulcrum (71) is pressed against the keycap (2), the second fulcrum (72) is magnetically engaged with the magnetic component (5), and the third fulcrum (73) is pressed against the circuit board (1). The scissor-switch assembly (3) includes an outer bracket (31) and an inner bracket (32). The outer bracket (31) is provided with a central shaft hole (311), and the inner bracket (32) is provided with a central shaft (321). The central shaft hole (311) is movably connected to the central shaft (321). The inner bracket (32) and the outer bracket (31) are both provided with a first fixing post at the end connected to the keycap (2), and the inner bracket (32) and the outer bracket (31) are both provided with a fixing shaft at the end connected to the base (4).
2. The thin magnetic torsion spring magnetic induction button structure according to claim 1, characterized in that: The inner support (32) is provided with a slot that cooperates with the magnetic component (5), and the slot is provided with a limiting rib (322) and a limiting buckle (323) that cooperate with the magnetic component (5) for limiting.
3. The thin magnetic torsion spring magnetic induction button structure according to claim 1, characterized in that: The base (4) is provided with a first buckle (41) and a second buckle (42). The first buckle (41) is located on the outside of the base (4) and rotates with the outer bracket (31). The second buckle (42) is located on the inside of the base (4) and engages with the inner bracket (32).
4. The thin magnetic torsion spring magnetic induction button structure according to claim 1, characterized in that: The keycap (2) is provided with a rotating latch (21), a sliding latch (22) and a boss (23). The rotating latch (21) and the sliding latch (22) are movably connected to the scissor-switch assembly (3). The boss (23) is located in the middle of the keycap (2). The boss (23) is provided with a positioning groove and pushes against the first fulcrum (71).
5. The thin magnetic torsion spring magnetic induction button structure according to claim 4, characterized in that: Several of the rotating latches (21) and several of the sliding latches (22) are arranged along the edge of the keycap (2).
6. A thin magnetic torsion spring magnetic induction button structure according to claim 4 or 5, characterized in that: The opening direction of some of the rotating buckles (21) is vertically upward, and the opening direction of some of the sliding buckles (22) is opposite.
7. The thin magnetic torsion spring magnetic induction button structure according to claim 1, characterized in that: The torsion spring (7) is further provided with a torsion spring coil, with the first fulcrum (71) and the torsion spring coil forming a first lever arm, and the third fulcrum (73) and the torsion spring coil forming a second lever arm.
8. A thin magnetic torsion spring magnetic induction key structure, comprising a circuit board (1), a keycap (2), a scissor-switch assembly (3), a base (4), a magnetic component (5), and a Hall sensor (6), wherein the Hall sensor (6) and the base (4) are both disposed on the circuit board (1), the base (4) is provided with a recessed groove adapted to the Hall sensor (6), one end of the scissor-switch assembly (3) is movably connected to the base (4), the other end of the scissor-switch assembly (3) is rotatably connected to the keycap (2), and the magnetic component (5) is disposed on the scissor-switch assembly (3) and adapted to the Hall sensor (6), characterized in that: The thin magnetic torsion spring magnetic induction key structure also includes a torsion spring (7), which is provided with a first fulcrum (71), a second fulcrum (72) and a third fulcrum (73). The first fulcrum (71) maintains a certain distance D from the boss of the keycap (2), the second fulcrum (72) is magnetically engaged with the magnetic component (5), and the third fulcrum (73) is press-fitted with the circuit board (1). The scissor-switch assembly (3) includes an outer bracket (31) and an inner bracket (32). The outer bracket (31) is provided with a central shaft hole (311), and the inner bracket (32) is provided with a central shaft (311). 21), the central shaft hole (311) is movably connected to the central shaft (321), the inner bracket (32) and the outer bracket (31) are each provided with a first fixed post at the end connected to the keycap (2), and the inner bracket (32) and the outer bracket (31) are each provided with a fixed shaft at the end connected to the base (4); the torsion spring (7) also includes a fourth fulcrum (74), a first torsion spring ring (75) and a second torsion spring ring (76), the first torsion spring ring (75) and the second torsion spring ring (76) are connected by a second lever arm, and the fourth fulcrum (74) is press-fitted with the keycap (2).