Springless magnetic rebound key

Abstract

This utility model discloses a springless magnetic rebound button, relating to the technical field of electronic device input devices. It includes a base assembly, a lower button assembly, and an upper button assembly. The lower button assembly is detachably connected to the upper button assembly through a sliding guide hole on the base assembly. A magnetic block mounting portion is provided in the center of the sliding guide hole. An upper moving magnetic element is embedded inside the upper button assembly, and a middle fixed magnetic element is embedded in the magnetic block mounting portion. A lower moving magnetic element is embedded at the bottom of the lower button assembly. The adjacent end faces of the upper moving magnetic element and the middle fixed magnetic element have the same magnetic poles, creating a repulsive force. The adjacent end faces of the lower moving magnetic element and the middle fixed magnetic element have opposite magnetic poles, creating an attractive force. This utility model not only effectively reduces the risk of accidental touches but also simplifies the button structure, reduces manufacturing and maintenance costs, and meets the needs of various electronic devices for high-precision input, durability, and operational comfort.

Description

Technical Field

[0001] This utility model relates to the field of electronic device input device technology, and more specifically to the field of springless magnetic rebound button technology. Background Technology

[0002] In the field of electronic device input device technology, buttons, as key interactive components, directly impact user experience and device performance. Currently, common button designs mainly include those relying on mechanical springs, electromagnetic components, and membrane buttons.

[0003] Traditional buttons rely on mechanical springs, where the spring's elastic deformation enables pressing and rebound. However, with increased use, mechanical springs wear down and fatigue, leading to a decrease in rebound effectiveness and affecting the button's responsiveness and durability.

[0004] Furthermore, membrane buttons commonly found in the market achieve button triggering and rebound through the combination of a rubber diaphragm and a conductive layer. While membrane buttons offer advantages such as simple structure and low cost, their tactile feedback is weak and unclear. Moreover, the rubber diaphragm is prone to fatigue after prolonged use, leading to inconsistent responses and reduced durability. Additionally, the limited tactile feedback of membrane buttons fails to meet users' demands for diverse and personalized tactile experiences.

[0005] With the ever-increasing demands for high reliability, low noise, and fast response in electronic devices, there is an urgent need to develop new button rebound technologies. In recent years, some technologies have attempted to use magnetic assistance or replace traditional springs to achieve button rebound, such as controlling button action using electromagnets. However, these solutions typically require additional power supply and complex control circuitry, making it difficult to achieve ideal results in terms of simplified structure and cost reduction.

[0006] Therefore, it is particularly important to develop a technology that relies entirely on magnetic force to achieve button rebound without the need for mechanical springs, electromagnets, or membrane structures. Utility Model Content

[0007] The purpose of this utility model is to provide a springless magnetic rebound button in order to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] This utility model provides a springless magnetic rebound button, including a base assembly and a button assembly. The base assembly has a sliding guide hole that allows the button assembly to slide through. The sliding guide hole accommodates and provides the vertical axial movement space required by the button assembly. The button assembly includes a lower button assembly and an upper button assembly. The lower button assembly passes through the sliding guide hole and is detachably connected to the upper button assembly. A magnetic block mounting part is provided in the middle of the sliding guide hole.

[0010] The upper button assembly has an upper moving magnetic element embedded inside, and the magnetic block mounting part has a middle fixed magnetic element embedded inside. The lower button assembly has a lower moving magnetic element embedded at the bottom. The upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are arranged coaxially from top to bottom. The magnetic poles of the adjacent end faces of the upper moving magnetic element and the middle fixed magnetic element are the same, and the two form a repulsive force. The magnetic poles of the adjacent end faces of the lower moving magnetic element and the middle fixed magnetic element are opposite, and the two form an attractive force. When not pressed, the repulsive force is less than the attractive force.

[0011] The base assembly is equipped with a limiting structure that restricts the vertical position of the button assembly.

[0012] Specifically, this solution optimizes the layout and magnetic field distribution of magnetic components, utilizing the interaction between these components to provide appropriate support force during button pressing and achieve rapid rebound upon release. This technology not only effectively reduces the risk of accidental touches but also simplifies the button structure, lowers manufacturing and maintenance costs, and meets the needs of various electronic devices for high-precision input, durability, and operational comfort.

[0013] The upper and lower moving magnetic elements move synchronously. The base is used to fix the middle fixed magnetic element and provide stable support, allowing the moving magnetic elements (upper and lower moving magnetic elements) to move up and down in the vertical direction. They are guided by the sliding guide holes of the base assembly and limited by the base assembly.

[0014] The upper moving magnetic element and the middle fixed magnetic element have the same magnetic poles on their adjacent end faces. When the button is not subjected to external force or the pressure is released, the repulsive force between the two not only provides the button with an upward auxiliary initial support force, but also becomes the main restoring force for the button to quickly rebound after the pressure is released.

[0015] The lower moving magnetic element and the middle fixed magnetic element have opposite magnetic poles on their adjacent end faces. Their attraction force will firmly fix the button assembly in the preset initial position when the button rebounds to the end of its travel, ensuring the stability and positioning accuracy of the rebound process.

[0016] The limiting structure on the base assembly works in conjunction with the button assembly to ensure that the button assembly (lower button assembly and upper button assembly) maintains precise positioning throughout its movement. When the button assembly moves downward to the preset position, the limiting structure prevents it from moving further downward; similarly, when the button assembly springs back to the base, the limiting structure prevents it from moving further upward, ensuring that the button assembly remains stably in the preset position.

[0017] During the button press process, the upper and lower moving magnetic elements move downward synchronously with the button housing, changing their relative positions with the middle fixed magnetic element, thereby causing a change in magnetic induction intensity, which triggers the signal output of the Hall sensor to realize button status detection.

[0018] The button structure of this solution boasts excellent compatibility, enabling it to work with various types of sensor components, such as Hall effect sensors, capacitive sensors, and photoelectric sensors. This broad adaptability provides a solid hardware foundation for achieving diversified button functions, improved response accuracy, and multimodal interaction. For example, Hall effect sensors can accurately sense changes in magnetic fields, enabling high-precision detection of button operations; capacitive sensors can detect changes in capacitance to achieve non-contact button triggering; and photoelectric sensors can utilize changes in light signals to provide rich feedback information for button operations.

[0019] In one embodiment, in the unpressed state, the axial distance between the upper moving magnetic element and the middle fixed magnetic element is smaller than the axial distance between the middle fixed magnetic element and the lower moving magnetic element.

[0020] When not pressed, the repulsive force between the upper moving magnetic element and the middle fixed magnetic element is less than the attractive force between the lower moving magnetic element and the middle fixed magnetic element; the superposition of the repulsive and attractive forces forms an upward supporting force, which reliably positions the lower button assembly and the upper button assembly in the preset initial position.

[0021] Specifically, maintaining a large initial distance between the upper moving magnetic element and the middle fixed magnetic element helps control the intensity of the repulsive force between them, thereby reducing the risk of performance degradation caused by long-term interaction between the magnetic elements and extending the stability and service life of the overall structure.

[0022] The work process is as follows:

[0023] When not pressed, the axial distance between the upper moving magnetic element and the middle fixed magnetic element is relatively large, creating a moderate repulsive force; the axial distance between the lower moving magnetic element and the middle fixed magnetic element is smaller, creating a stable attractive force. The superposition of these two magnetic forces creates a net upward magnetic support, reliably positioning the button assembly in the preset initial position and ensuring structural stability.

[0024] In the initial stage of pressing, the attraction between the fixed magnetic element in the middle and the moving magnetic element in the lower part constitutes the main initial feedback force of the button, forming a clear tactile feedback. This not only helps prevent accidental touches but also makes it easier for users to judge whether a valid pressing operation has been completed, thus improving the overall interactive experience.

[0025] When the weight of the button assembly and the applied pressure exceed the combined force of the attractive force between the lower moving magnetic element and the middle fixed magnetic element, and the repulsive force between the upper moving magnetic element and the middle fixed magnetic element, the relative axial distance between the lower moving magnetic element and the middle fixed magnetic element increases rapidly, and the attractive force between them decreases sharply. At this time, the combined effect of magnetic force and gravity causes the button assembly to produce instantaneous acceleration, resulting in a significant displacement change, providing clear and strong physical feedback, improving operational accuracy and response speed, and ensuring the reliability of button operation.

[0026] As the button assembly is pressed continuously, the axial distance between the lower moving magnetic element and the middle fixed magnetic element gradually increases, and the attraction between the two gradually weakens.

[0027] At the same time, the axial distance between the upper moving magnetic element and the middle fixed magnetic element gradually decreases, causing the repulsive force between them to gradually increase. This increased repulsive force leads to a gradual increase in pressing resistance, forming progressive tactile feedback. Users can intuitively perceive the changes in resistance during the pressing process, improving the smoothness and naturalness of the operation.

[0028] When the button assembly is pressed until it contacts the limiting structure inside the base, the forces reach equilibrium, the pressing resistance stabilizes, and the button enters the fully pressed state.

[0029] The enhanced repulsive force not only provides continuous support, slows down the downward pressure, and optimizes the transition of the feel, but also quickly causes the button components to spring back to their initial position after the pressure is released, improving the responsiveness of the operation and the overall user experience.

[0030] After the pressure on the button assembly is released, the enhanced repulsive force and the weakened attractive force work together to drive the button assembly to spring back to the preset position, achieving a smooth and reliable reset.

[0031] In the initial rebound phase, the repulsive force between the upper moving magnetic element and the middle fixed magnetic element plays a dominant role, driving the button assembly to quickly begin to move upward.

[0032] As the button assembly moves upward, the axial distance between the upper moving magnetic element and the middle fixed magnetic element gradually increases, and the repulsive force between them gradually weakens; simultaneously, the axial distance between the lower moving magnetic element and the middle fixed magnetic element gradually decreases, and the attractive force between them gradually strengthens. When the button assembly touches the base limiting structure, the forces reach equilibrium, the resistance remains stable, and the button assembly returns to the preset initial position.

[0033] When the button assembly springs back to its preset initial position, the interior of the lower housing of the button assembly contacts the bottom of the limiting structure of the base, generating a brief mechanical vibration, which in turn produces clear audible feedback, providing the user with explicit auditory confirmation. This audible feedback provides the user with immediate feedback that the operation has been completed, ensuring that each press action can be intuitively confirmed.

[0034] When the button assembly rebounds to the middle of its travel and the external pressure has not yet fully dissipated, the user applies pressure again. At this point, the magnetic structure continues to provide upward support, but because the relative positions of the magnetic elements at this stage are in the transition zone of the magnetic force change curve, the net upward magnetic force generated is reduced compared to the initial state and the fully pressed state. This results in a reduced pressing force, achieving a gentler and smoother operating feel. This design effectively reduces resistance during continuous pressing, contributing to improved button response speed and user comfort.

[0035] The magnetic force between magnetic elements varies non-linearly with the spacing. This means that when the axial spacing is small, the repulsive or attractive force increases rapidly, while it decreases rapidly as the spacing increases.

[0036] To further illustrate the influence of the spacing between magnetic components on the change of magnetic force, the following explanation uses the initial state as an example: In the initial state, the axial spacing between the upper moving magnetic component and the middle fixed magnetic component is set to 5mm, resulting in a small repulsive force; the spacing between the middle fixed magnetic component and the lower moving magnetic component is 1mm, resulting in a large attractive force, thus forming a strong net upward magnetic force and effectively supporting the initial position of the button assembly.

[0037] As the button assembly moves downward to the fully pressed state, the two gaps become 1mm and 5mm respectively, the repulsive force increases and the attractive force decreases, but the overall upward magnetic force remains within the effective range, achieving stable rebound.

[0038] During the middle of the stroke (such as when pressed or rebounded about 2mm), the distance between the two sets of magnetic elements is 3mm, which is in the middle area of ​​the magnetic force change curve. At this time, the net upward magnetic force is relatively low, which helps to reduce the pressing force and improve the operating feel.

[0039] It should be understood that the above spacing and axial movement distance are only examples, and the specific values ​​can be adjusted according to the actual structure and application requirements, and should not constitute a limitation of this utility model.

[0040] As you continue pressing, the magnetic resistance provided by the structure gradually increases, creating progressive tactile feedback and achieving a smooth transition from gentle to firm, further enhancing the comfort of operation and the user experience.

[0041] By scientifically configuring the initial and post-press axial spacing between magnetic components, the travel of the button assembly, and the structural parameters of the magnetic components, this solution not only achieves flexible control over the tactile characteristics of the button assembly, such as initial trigger force, pressure change curve, and rebound speed, but also significantly improves the speed, stability, and reliability of the trigger response. It can adapt to diverse application needs and has broad practical value and promotion prospects.

[0042] In one embodiment, the upper button assembly includes an upper housing and an upper mounting hole on the lower surface of the upper housing for mounting an upper moving magnetic element, wherein the depth of the upper mounting hole is greater than the thickness of the upper moving magnetic element.

[0043] The lower button assembly includes a lower housing and a lower mounting hole on the lower surface of the lower housing for mounting a lower moving magnetic element. The depth of the lower mounting hole is greater than the thickness of the lower moving magnetic element.

[0044] Specifically, the mounting hole depth is greater than the thickness of its corresponding moving magnetic component to provide installation buffer space, thus accommodating different installation requirements and fixing methods. All mounting holes employ a concave structure design to embed and securely fix the corresponding moving magnetic component. The size of the recessed area is slightly larger than the magnetic component body, ensuring that the magnetic component's mounting position is always below the edge of the mounting hole opening, thereby preventing the magnetic component from contacting other components during button assembly movement.

[0045] In one embodiment, a damping layer and a sealing layer are provided inside the upper mounting hole and the lower mounting hole.

[0046] Specifically, the mounting holes (upper and lower) can also be fitted with functional auxiliary structures, including a damping layer and a sealing layer. The damping layer effectively buffers the mechanical impact generated during the movement of the button assembly, reducing the impact of vibration on the moving magnetic components and improving the overall structural stability and durability. The sealing layer blocks the influence of external media such as dust and moisture on the magnetic components, enhancing the button assembly's adaptability to various environmental conditions and its long-term operational reliability.

[0047] In one embodiment, the limiting structure is clearance-fitted with the lower housing, and a certain amount of clearance is reserved for movement.

[0048] Specifically, the inner wall of the sliding guide hole is precisely fitted with the lower housing to form a guiding structure, while an appropriate gap is reserved to ensure smooth movement of the button assembly in the vertical direction, avoiding excessive tilting or jamming. The limiting structure ensures that the button assembly moves smoothly within a predetermined range, ensuring that the movement range of the button assembly does not exceed the predetermined limit.

[0049] To accommodate diverse assembly requirements and complex process conditions, this solution employs a flexible approach to the dimensional design of the button's lower shell and base. This approach precisely adjusts the dimensions based on the shape of the magnetic components, manufacturing tolerances, and pre-defined clearances to ensure a perfect fit between all components during assembly and operation.

[0050] In one embodiment, the top and bottom of the limiting structure are respectively provided with shock-absorbing layers, and the material of the shock-absorbing layers is silicone or polyurethane.

[0051] Specifically, to further improve sound quality, damping layers with shock-absorbing properties, such as silicone or polyurethane, can be installed in the upper and lower areas of the limiting structure. These layers suppress high-frequency vibration noise through their excellent damping effect, while preserving clear low-frequency feedback. This design ensures that users receive clear and comfortable auditory feedback during operation, significantly improving the sound experience of the buttons and enhancing the synergy between tactile and acoustic elements. It not only improves sound quality but also enhances the smoothness of button operation through tactile feedback, further improving the overall user experience and satisfaction.

[0052] When the button assembly rebounds to the lower end of the base limiting structure, the damping layer, due to its elasticity, deforms rapidly upon contact, prolonging the impact time and effectively reducing the instantaneous impact force according to the impulse theorem. The damping effect of the damping layer further suppresses vibration fluctuations during the rebound process, effectively maintaining the stability of the magnetic domain arrangement and ensuring the long-term reliability of the magnetic field strength and system performance.

[0053] In one embodiment, a central threaded mounting groove is provided inside the magnetic block mounting part, and a central adjusting screw sleeve with adjustable position is provided inside the central threaded mounting groove. The central fixed magnetic element is installed in the mounting hole of the central adjusting screw sleeve.

[0054] The upper mounting hole is an upper threaded mounting groove, and an adjustable upper adjusting screw sleeve is provided in the upper threaded mounting groove. The upper fixed magnetic element is installed in the mounting hole of the upper adjusting screw sleeve.

[0055] The lower mounting hole is a lower threaded mounting groove, and an adjustable lower adjusting screw sleeve is provided in the lower threaded mounting groove. The lower fixed magnetic element is installed in the mounting hole of the lower adjusting screw sleeve.

[0056] Specifically, this solution adjusts the magnitude and trend of the magnetic force between the three magnetic elements by precisely configuring the initial axial spacing between them, thereby flexibly controlling the initial support force and rebound characteristics of the button assembly. To achieve precise adjustment of the spacing, each magnetic element can be housed in a corresponding adjustable sleeve. The adjusting sleeve has external threads and can be screwed into a mounting hole with internal threads. Rotating the adjusting sleeve moves the magnetic element vertically, thus achieving precise control of its relative axial position.

[0057] For example, appropriately increasing the initial axial distance between the lower moving magnetic element and the middle fixed magnetic element can reduce the attraction between them, thereby reducing the initial pressing force of the button assembly and making the button easier to trigger.

[0058] Conversely, when the axial spacing is reduced, the attraction between the two forces is enhanced, and the button assembly obtains a stronger upward support force when stationary. Users need to apply greater pressing force to trigger the button, thereby improving the accuracy of triggering. This is suitable for application scenarios that require prevention of accidental touches, such as the operation buttons of industrial control equipment, to avoid abnormal operation of the equipment due to misoperation.

[0059] In addition, by increasing the initial axial distance between the upper moving magnetic element and the middle fixed magnetic element, the repulsive force between the two can be effectively reduced, the resistance encountered by the button assembly in the initial pressing stage can be reduced, and the ease and flexibility of operation can be improved. Conversely, reducing the distance will increase the repulsive force between the two, thereby increasing the initial pressing force and making the button feedback more elastic and controllable.

[0060] Furthermore, this solution can also achieve precise control of the rebound speed by flexibly configuring the axial distance between the first and lower moving magnetic elements and the middle fixed magnetic element after pressing, as well as setting the movement stroke of the button assembly, so as to better meet the personalized needs of different users for trigger pressure and tactile feedback.

[0061] Specifically, reducing the axial distance between the upper moving magnetic element and the middle fixed magnetic element after pressing can enhance the repulsive force between them, improve the rebound force of the button assembly, accelerate the rebound speed, and achieve rapid reset; when the distance is increased, the repulsive force between the two weakens, and the rebound speed decreases accordingly.

[0062] Similarly, reducing the distance between the lower moving magnetic element and the middle fixed magnetic element after pressing can enhance their attraction, providing a stronger auxiliary force for rebound and accelerating the reset process; while increasing the distance weakens the attraction and reduces the rebound speed.

[0063] Based on this, by reasonably setting the motion travel parameters of the button components, their rebound performance and operation feedback can be further optimized. The motion travel of the button components refers to the displacement distance that the button components undergo from the fully pressed state back to the initial position. This parameter directly affects the duration of force and acceleration change of the button components under magnetic force, thus determining the response speed and tactile style in actual operation.

[0064] For example, a short travel design allows button components to quickly reset with minimal displacement, significantly improving responsiveness and making it suitable for applications requiring high-speed operation, such as game controllers. Conversely, a longer travel design provides a more cushioned rebound, enhancing the smoothness and comfort of operation. This travel setting mechanism offers diverse design strategies that balance responsiveness and tactile comfort for various scenarios.

[0065] Furthermore, this structure allows for adjustments to the geometry and shape of the magnetic components to suit the magnetic field strength requirements of different applications. For example, increasing the diameter of the magnetic components can expand the effective magnetic field range, improve the uniformity and coverage of the magnetic field distribution, and is suitable for industrial control equipment with high requirements for triggering stability.

[0066] In one embodiment, the upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are all flat structures, ring structures, or other geometric shapes with similar magnetic flux distribution and magnetic conduction effects.

[0067] Specifically, to achieve the required magnetic field strength while maintaining a miniaturized structure, this solution employs structural forms with excellent magnetic properties, such as flat structures, ring structures, or other geometries with similar magnetic flux distribution and permeability. This is combined with high-performance magnetic materials possessing high remanence and high coercivity, thereby significantly improving the controllability of the magnetic field distribution and the stability of system operation. This synergistic design of structure and materials not only improves the efficiency of magnetic field generation during dynamic response but also effectively extends the lifespan of magnetic components, thus enhancing the overall system reliability and durability.

[0068] Increasing the thickness of magnetic components helps to improve their magnetic flux density, thereby enhancing the magnetic field strength. This is particularly suitable for applications requiring high-precision magnetic field control, such as touch components in precision electronic devices.

[0069] In one embodiment, the upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are made of one or more of neodymium iron boron permanent magnets, ferrite permanent magnets, samarium cobalt alloy permanent magnets, and AlNiCo alloy permanent magnets.

[0070] Specifically, neodymium iron boron (NdFeB) permanent magnets, which have high coercivity, are preferred as magnetic components. These magnets can stably maintain magnetic performance under complex operating conditions, ensuring long-term reliable operation of the device. Under conditions where the button assembly repeatedly undergoes vertical coaxial movement and is continuously subjected to mechanical stress and magnetic field changes, the NdFeB permanent magnets, with their high coercivity, can effectively maintain the stability of the magnetic domain structure, significantly slowing down magnetic performance degradation and domain rearrangement. This extends the overall lifespan of the device and continuously provides stable and reliable magnetic feedback.

[0071] Furthermore, the magnetic element of this invention is not limited to neodymium iron boron permanent magnets. Other permanent magnet materials with specific magnetic properties, such as ferrite, samarium cobalt alloy, and AlNiCo alloy, can be selected to meet different application scenarios and performance requirements, or multiple magnetic materials can be combined to optimize the overall magnetic effect.

[0072] Magnetic materials and their combinations can be flexibly configured based on factors such as magnetic field distribution characteristics, temperature stability, cost control, and space utilization, thereby achieving a balance between system performance and structural adaptability. Through proper selection, the magnetic field layout can be optimized under different environmental conditions, enhancing tactile feedback and ensuring the system's stability and reliability during long-term operation. All magnetic materials and their combinations that meet the requirements of magnetic field distribution, temperature stability, cost control, and space utilization should be considered within the scope of protection of this utility model.

[0073] To reduce costs and improve long-term stability, the lower moving magnetic element in this invention can be made of a material with high magnetic permeability, such as silicon steel sheet, permalloy, or amorphous alloy. Although these materials themselves have relatively weak magnetism, their excellent magnetic permeability allows them to effectively construct a low-resistivity magnetic circuit. This circuit is mainly used to guide and balance the magnetic field distribution generated by the fixed magnetic element in the middle, and structurally it also provides some auxiliary adjustment and guidance for the magnetic flux formed by the upper moving magnetic element.

[0074] By optimizing the overall magnetic flux path, this design can significantly improve the magnetic field stability during the button rebound process, extend the service life of magnetic components, and ensure the long-term reliability of overall triggering performance.

[0075] In one embodiment, the button assembly is covered with a flexible material coating layer, which is a polymer elastomer material.

[0076] Specifically, to further enhance the structural stability and environmental adaptability of the button assembly, one optional implementation of this solution proposes to provide a flexible material covering layer on the outside of the button assembly. This covering layer can cover the outer surfaces of the upper and lower housings of the button assembly and fit tightly against the button base assembly, forming a closed and elastic sealed space. This effectively blocks the entry of dust, moisture, and other contaminants from the external environment, thereby improving the protection level of the button assembly and ensuring the long-term stability of internal components under different environmental conditions.

[0077] In practical implementation, the flexible material is preferably a polymeric elastomer, including silicone and thermoplastic elastomers. These materials possess excellent resilience, weather resistance, sealing properties, and cushioning performance. During the operation of the button assembly, when an external force causes displacement, the flexible material stores elastic potential energy through deformation and quickly returns to its original shape after the external force is removed, providing the necessary reaction force to ensure the rapid rebound of the button assembly. Simultaneously, the flexible material coating effectively absorbs vibration and impact, reducing mechanical fatigue and component wear, further extending service life.

[0078] The beneficial effects of this utility model are as follows:

[0079] 1. This utility model eliminates the need for a traditional spring structure. It achieves automatic button rebound through the magnetic repulsion and attraction between magnetic components, simplifying the overall structure, reducing the risk of mechanical wear, and improving service life and reliability. During the pressing and rebound process, the magnetic force dynamically changes with the button displacement, forming clear multi-stage tactile feedback. It has both an initial damping feel and provides progressively enhanced support feedback in the final stroke, effectively preventing accidental touches and improving operational accuracy.

[0080] 2. The structure forms a stable mechanical balance through the axial arrangement of three magnetic elements, realizing an efficient magnetic rebound and displacement restriction mechanism, and possessing high response speed and excellent stability;

[0081] The limiting structure of the base in the structure works in conjunction with the magnetic force to ensure that the movement range of the button is precisely controllable, avoid overpressure or uncontrolled sinking, and ensure safety and consistent feel during use.

[0082] 3. Since the magnetic rebound structure itself does not involve spring deformation and fatigue issues, it can effectively avoid the elastic decay and jamming phenomenon caused by traditional springs in high-frequency operation or harsh environments, thereby significantly improving the long-term stability and consistency of the button structure and meeting the needs of high-reliability equipment for long life and low maintenance.

[0083] The installation positions of the magnetic components in this invention can be precisely adjusted. With the help of the limiting structure, the button travel and trigger point position can be flexibly set. Users or manufacturers can customize the trigger force and travel configuration according to different usage habits and scenario requirements, thereby achieving higher adaptability and customization capabilities.

[0084] 4. This invention achieves a multi-segment tactile feedback curve during the pressing process by precisely configuring the initial spacing between magnetic components and their relative positional changes during the pressing stroke. This leverages the inherent non-linear characteristics of magnetic force changing with distance. This non-linear feedback significantly improves the tactile recognition and operational accuracy of the buttons, enhancing the overall user experience. Furthermore, by adjusting the spacing between magnetic components or the overall stroke structure parameters, the tactile characteristics can be flexibly customized for different application scenarios (such as game control, industrial equipment, consumer electronics, etc.), demonstrating high adaptability.

[0085] 5. This utility model not only has significant advantages in terms of structural simplification, feedback optimization and stability, but also achieves a high degree of unity between mechanical performance and user experience through magnetic control, representing the development direction of the next generation of high-performance button technology. Attached Figure Description

[0086] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0087] Figure 1 This is a schematic diagram of the structure of Example 1;

[0088] Figure 2 This is a schematic diagram of the rough explosion of the structure in Example 1;

[0089] Figure 3 This is a rough explosive cross-sectional view of the structure in Example 1;

[0090] Figure 4 This is a schematic diagram of the structure of Example 1 being exploded again;

[0091] Figure 5 This is a schematic diagram of the structure of Example 1 after a second explosion.

[0092] Figure 6 This is a schematic diagram of the assembly of the lower button assembly and the base assembly in Embodiment 1;

[0093] Figure 7 This is a cross-sectional view of Example 1 where the button is not pressed.

[0094] Figure 8 This is a cross-sectional view of the button after it is pressed in Example 1;

[0095] Figure 9 This is a schematic cross-sectional view of Example 1 in the unpressed state;

[0096] Figure 10 This is a schematic cross-sectional view of Example 1 under fully pressed conditions;

[0097] Figure 11 This is an exploded view of the structure in Example 2;

[0098] Figure 12 This is an exploded cut view of the preferred structure of Example 2;

[0099] Figure 13 This is a cross-sectional view of the project in Example 2 (before adjustment);

[0100] Figure 14 This is a cross-sectional view of the project in Example 2 (after adjustment);

[0101] Figure 15 This is a schematic diagram of the structure of Example 3;

[0102] Figure 16 This is a schematic diagram of the rough explosion of the structure in Example 3;

[0103] Figure 17 This is an exploded view of the upper button assembly in Example 3;

[0104] Figure 18 This is an exploded view of the base assembly in Example 3;

[0105] Figure 19 This is an exploded view of the lower button assembly in Example 3;

[0106] Figure 20 This is a schematic cross-sectional view of Example 3 in the unpressed state;

[0107] Figure 21 This is a schematic cross-sectional view of the project in the fully pressed state of Example 3;

[0108] Figure 22 This is a schematic diagram of the structure of Example 4;

[0109] Figure 23 This is a schematic diagram of an explosion in Example 4;

[0110] Figure 24 This is a schematic diagram of an exploded cross-section of Example 4;

[0111] Figure 25 This is a schematic cross-sectional view of Example 4 in the unpressed state;

[0112] Figure 26 This is a schematic cross-sectional view of Example 4 under fully pressed conditions;

[0113] Figure 27 This is a schematic diagram of the preferred structure of Example 4;

[0114] Figure 28 This is an exploded view of the preferred structure of Example 4;

[0115] Figure 29 This is an exploded cross-sectional view of the preferred structure of Example 4;

[0116] Figure 30 This is a schematic diagram of the preferred structure of Example 4 without adjustment.

[0117] Figure 31 This is a cross-sectional view of the preferred structure after adjustment in Example 4;

[0118] Reference numerals: 1-Upper button assembly, 101-Upper housing, 102-First shock-absorbing layer, 103-First sealing layer, 109-Upper adjusting screw sleeve;

[0119] 2-Base assembly, 201-Base, 202-Second damping layer, 203-Upper damping sealing layer of base, 204-Lower damping layer of base, 209-Central adjusting sleeve;

[0120] 3-Lower button assembly, 301-Lower housing, 302-Third shock-absorbing layer, 303-Third sealing layer, 309-Lower adjusting screw sleeve;

[0121] 4-Upper moving magnetic element, 5-Middle fixed magnetic element, 6-Lower moving magnetic element;

[0122] 7-Hall component, 701-Hall component housing, 702-Hall sensor;

[0123] 8-Button assembly;

[0124] 9-Second button unit; 901-Guide post; 902-Upper boss; 903-Lower boss; 904-Upper connecting section; 905-Lower connecting section. Detailed Implementation

[0125] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0126] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0127] Example 1

[0128] like Figures 1 to 10 As shown, this embodiment provides a springless magnetic rebound button, including a base assembly 2 and a button assembly 8. The base 201 serves as a fixed platform for the entire structure, providing stable support for each component and ensuring the stability of the button assembly 8 during movement under magnetic force.

[0129] The base assembly 2 includes a base 201 and a sliding guide hole disposed on the base 201. A magnetic block mounting part is disposed in the middle of the sliding guide hole, and a central fixed magnetic element 5 is installed in the magnetic block mounting part.

[0130] The button assembly 8 includes a lower button assembly 3 and an upper button assembly 1. The lower button assembly 3 passes through a sliding guide hole and is fixedly connected to the upper button assembly 1. An upper moving magnetic element 4 is embedded inside the upper button assembly 1, and a lower moving magnetic element 6 is embedded at the bottom of the lower button assembly 3.

[0131] The upper button assembly 1 includes an upper housing 101 and an upper mounting hole on the lower surface of the upper housing 101 for mounting an upper moving magnetic element 4. The depth of the upper mounting hole is greater than the thickness of the upper moving magnetic element 4. The lower button assembly 3 includes a lower housing 301 and a lower mounting hole on the lower surface of the lower housing 301 for mounting a lower moving magnetic element 6. The depth of the lower mounting hole is greater than the thickness of the lower moving magnetic element 6.

[0132] The upper moving magnetic element 4, the middle fixed magnetic element 5, and the lower moving magnetic element 6 are arranged coaxially from top to bottom. The magnetic poles of the adjacent end faces of the upper moving magnetic element 4 and the middle fixed magnetic element 5 are the same, and the two form a repulsive force. The magnetic poles of the adjacent end faces of the lower moving magnetic element 6 and the middle fixed magnetic element 5 are opposite, and the two form an attractive force. In the unpressed state, the repulsive force is less than the attractive force.

[0133] The sliding guide hole on the base 201 is used to accommodate the lower button assembly 3 and provide it with vertical movement space. A precise guiding fit structure is formed between the inner wall of the sliding guide hole and the lower housing 301, ensuring smooth vertical movement of the button assembly 8 and effectively preventing tilting or jamming. To accommodate manufacturing tolerances and practical application requirements, the guide clearance can be adjusted appropriately according to specific parameters.

[0134] Meanwhile, the base 201 also has a limiting structure function. The limiting structure is precisely matched with the lower housing 301 and an appropriate movement gap is reserved to ensure that the button assembly 8 moves smoothly within a predetermined range and prevents excessive displacement.

[0135] The position and magnetic parameters of the central fixed magnetic element 5 are designed according to the magnetic triggering requirements of the button assembly 8, and form a predetermined magnetic field distribution through its own magnetic properties. During the movement of the button assembly 8, this magnetic field interacts with the upper moving magnetic element 4 and the lower moving magnetic element 6 to generate the required repulsive and attractive forces, thereby achieving precise movement control of the button assembly 8 under the set magnetic mechanism.

[0136] In this embodiment, the mounting hole adopts a concave structure, and the upper moving magnetic element 4 is fixedly disposed in the concave area to ensure its positional stability. The upper moving magnetic element 4 and the middle fixed magnetic element 5 fixed in the base 201 have the same magnetic poles on their adjacent end faces, forming a mutual repulsion relationship, which provides the main rebound force and appropriate initial support for the button assembly 8, ensuring its normal movement in the vertical direction.

[0137] The lower moving magnetic element 6 and the middle fixed magnetic element 5 have opposite magnetic poles on their adjacent end faces, and they attract each other. The mounting hole also adopts a concave structure to mount the lower moving magnetic element 6.

[0138] The mounting holes all feature a concave structure, with a depth greater than the thickness of the corresponding magnetic element. This effectively prevents the magnetic element of the button assembly 8 from directly impacting other components during movement. Simultaneously, the mounting holes provide ample buffer space to accommodate different installation requirements and fixing methods.

[0139] The upper moving magnetic element 4, the middle fixed magnetic element 5, and the lower moving magnetic element 6 are arranged coaxially from top to bottom, all made of cylindrical neodymium iron boron permanent magnets. Neodymium iron boron has high remanence, high coercivity, and excellent magnetic property stability, which can effectively ensure the stability of the magnetic field strength and direction of the magnetic triggering structure under different environments, thus improving the overall response sensitivity and long-term reliability of the device.

[0140] The lower button assembly 3 passes through a sliding guide hole in the base 201 and is fixedly connected to the upper button assembly 1, together forming an integrated button assembly 8. Through this structural design, the button assembly 8 can achieve stable guided movement in the sliding guide hole, while ensuring its accurate positioning and reliable movement in the vertical direction.

[0141] When not pressed, a large axial distance is maintained between the upper moving magnetic element 4 and the middle fixed magnetic element 5, effectively reducing the interference of the repulsive force between them on the magnetic domain alignment. This configuration mitigates the negative impact of magnetic degradation, extends the stability and lifespan of the magnetic elements, and ensures stable button performance during long-term use.

[0142] In the unpressed state, the axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 is greater than the axial distance between the middle fixed magnetic element 5 and the lower moving magnetic element 6. At this time, the magnetic poles of the adjacent end faces of the lower moving magnetic element 6 fixed to the lower housing 301 and the middle fixed magnetic element 5 fixed in the base 201 are opposite, and they attract each other; the magnetic poles of the adjacent end faces of the upper moving magnetic element 4 fixed to the upper housing 101 and the middle fixed magnetic element 5 fixed in the base 201 are the same, and they repel each other.

[0143] The two magnetic forces work together to form a net upward magnetic support force, enabling precise contact between the lower housing 301 of the lower button assembly 3 and the lower surface of the base 201 limiting structure. When the button assembly 8 is in the preset initial position, the lower surface of the base 201 limiting structure can stably limit the initial positioning of the button assembly 8 in the vertical direction, thereby achieving reliable structural support and magnetic guidance.

[0144] In the initial stage of pressing, the attraction between the central fixed magnetic element 5 and the lower moving magnetic element 6 constitutes the main initial feedback force of the button assembly 8, forming clear tactile feedback. This not only helps prevent accidental touches but also makes it easier for users to judge whether an effective pressing operation has been completed, thus improving the overall interactive experience.

[0145] When the weight of the button assembly 8 and the applied pressing force exceed the combined force of the attractive force between the lower moving magnetic element 6 and the middle fixed magnetic element 5 and the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5, the relative axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 increases rapidly, and the attractive force between them decreases sharply. At this time, the combined action of magnetic force and gravity causes the button assembly 8 to generate instantaneous acceleration, resulting in a significant displacement change, providing clear and strong physical feedback, improving operational accuracy and response speed, and ensuring the reliability of button operation.

[0146] As the button assembly 8 continues to move vertically downward, the axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually increases, and the attraction between the two decreases sharply; the axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually decreases, and the repulsive force between the two gradually increases, and the pressing resistance gradually increases, forming a progressive tactile feedback.

[0147] When the upper housing 101 of the button assembly 8 makes precise contact with the upper surface of the limiting structure of the base 201, the forces reach dynamic equilibrium, the pressing resistance is stable, and the button assembly 8 reaches the fully pressed state. Supported by the limiting structure of the base 201, the button assembly 8 is reliably positioned in the preset position, ensuring its vertical stability and repeatability.

[0148] After the pressure on the button assembly 8 is released, the externally applied pressure is removed, and the button assembly 8 automatically rebounds under the constant magnetic force, achieving a stable and reliable reset action. In the initial stage of rebound, the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5 plays a dominant role, driving the button assembly 8 to quickly begin to move upward. As the button assembly 8 gradually moves upward, the relative axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually increases, and the repulsive force between them gradually weakens; at the same time, the axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually decreases, and the attractive force between them gradually strengthens, further promoting the rebound process.

[0149] The dynamic changes in repulsive and attractive forces work together to create a net upward magnetic force, propelling the button assembly 8 to a preset initial position. When the interior of the lower housing 301 makes precise contact with the lower surface of the base 201, the forces reach equilibrium, the rebound resistance remains stable, and the button assembly 8 returns to the preset initial position.

[0150] When the button assembly 8 returns to its preset initial position, the interior of the lower housing 301 of the button assembly 8 contacts the lower surface of the limiting structure of the base 201, generating a brief mechanical vibration, which in turn produces clear audible feedback, providing the user with clear auditory confirmation. This audible feedback provides the user with immediate feedback that the operation is complete, ensuring that each pressing action can be intuitively confirmed.

[0151] Example 2

[0152] like Figure 11-14 As shown, this embodiment is an optimization based on embodiment 1, as follows:

[0153] To further enhance the controllability of the interaction force between magnetic components, this embodiment provides a structural design for adjusting the axial spacing of magnetic components. Specifically, the upper housing 101, the base 201, and the lower housing 301 are respectively provided with mounting holes for installing magnetic components. The inner wall of the mounting hole is preferably configured with a threaded structure to form a threaded engagement with the corresponding adjusting sleeve, making the installation and position adjustment of the magnetic components more stable and reliable.

[0154] The upper moving magnetic element 4 is fixed inside the upper adjusting sleeve 109 and screwed into the threaded mounting hole in the upper housing 101; the middle fixed magnetic element 5 is fixed inside the middle adjusting sleeve 209 and screwed into the threaded mounting hole on the base 201; the lower moving magnetic element 6 is fixed inside the lower adjusting sleeve 309 and screwed into the threaded mounting hole at the bottom of the lower housing 301. Preferably, the upper housing 101 and the lower housing 301 are connected by a threaded connection, which facilitates disassembly and adjustment, improves the maintenance convenience and adjustment flexibility of the overall structure, and ensures stability during assembly.

[0155] By rotating the upper adjusting sleeve 109, the middle adjusting sleeve 209, and the lower adjusting sleeve 309, the corresponding magnetic elements can be moved precisely in the vertical direction, thereby achieving continuous adjustment of the axial distance between the three. This allows for flexible control of the intensity and distribution of magnetic force, improving the adjustability and adaptability of the button assembly 8 in terms of trigger force, rebound speed, and overall feel. For example, users can adjust the initial axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 to reduce or enhance the attraction between them, thereby adjusting the initial trigger force of the button assembly 8; or they can optimize the repulsive force intensity by adjusting the relative axial position of the upper moving magnetic element 4 and the middle fixed magnetic element 5, further improving the rebound performance and feedback characteristics.

[0156] This adjustment structure does not require replacement of the magnetic component itself; high-precision position adjustment can be achieved simply by rotating it. It has the advantages of simple structure, convenient adjustment, and strong adaptability. It is especially suitable for application scenarios with high requirements for personalized feel, such as high-end mechanical keyboards, industrial control terminals, and medical operation panels.

[0157] Example 3

[0158] Based on Example 1 and its magnetic interaction mechanism, this embodiment has carried out multi-dimensional optimization design for the springless magnetic rebound button structure to further optimize structural performance, enhance environmental adaptability, and improve user operation experience.

[0159] First, to improve the shock resistance and environmental sealing of the magnetic component mounting area, this embodiment introduces a damping layer and a sealing layer in the magnetic component mounting hole area. The damping layer uses a material with high elasticity and excellent energy absorption properties, effectively buffering the vibration and impact generated during the movement of the button assembly and reducing stress fluctuations on the magnetic component. The sealing layer is composed of high-performance sealing material, forming a continuous and complete protective barrier that effectively prevents the intrusion of external contaminants such as dust and moisture, thereby significantly improving the overall structure's durability and reliability.

[0160] Secondly, to further optimize energy management during the button rebound process, this embodiment adds flexible buffer structures to the upper and lower areas of the base limiting structure. The highly elastic material used can quickly absorb and disperse impact energy when the button assembly comes into contact with the base limiting structure, reducing vibration transmission to magnetic components and other key parts, effectively reducing mechanical noise, while improving rebound response speed and operating feel, ensuring the smoothness and comfort of the rebound process.

[0161] Regarding the magnetic component structure, this embodiment replaces the original cylindrical magnetic component with a ring-shaped magnetic component, thus optimizing the magnetic structure design. The ring structure has superior magnetic flux distribution characteristics, which can improve the utilization efficiency of magnetic lines of force, reduce magnetic field concentration, and make the magnetic field change smoother and more controllable. This further improves the triggering accuracy and rebound stability of the button assembly, and enhances the reliability and durability of the overall magnetic system.

[0162] Furthermore, to enhance the maintainability and customizability of the overall structure, the upper housing 101 and lower housing 301 of the button assembly 8 are connected by a threaded connection to form an integrated structure, enabling quick disassembly and convenient maintenance. This threaded connection is the specific structural form adopted in this embodiment, significantly improving the reconfigurability of the structure. It should be noted that the connection method is not the only limitation of this utility model; other equivalent structural forms such as snap-fit ​​or welding can be used as alternatives depending on the actual application requirements.

[0163] To achieve real-time detection and accurate feedback of button status, this embodiment includes a Hall effect component 7 at the lower part of the button assembly 8, comprising a Hall effect component housing 701 and a Hall effect sensor 702. The Hall effect sensor is precisely installed at a key position on the movement path of the button assembly, enabling it to fully sense changes in the magnetic field caused by the displacement of the magnetic components.

[0164] The movement of the button assembly 8 causes the lower moving magnetic element 6 to move relative to it, changing its relative position with the middle fixed magnetic element 5, thereby causing a change in the local magnetic field strength. The Hall sensor, based on the Hall effect, converts this magnetic field change into a corresponding electrical signal, thus realizing the button assembly's travel detection or status feedback function. Depending on specific application requirements, other detection elements such as magnetoresistive sensors and photoelectric sensors can also be selected to expand application scenarios and improve system flexibility.

[0165] In summary, this embodiment, while maintaining the core principle of springless magnetic rebound, achieves a comprehensive improvement in the button's initial support force, pressing feedback, rebound reset characteristics, and environmental adaptability through optimized shock absorption and sealing design of the magnetic component mounting structure, enhanced buffering of the base limiting area, geometrically optimized application of a ring magnet for magnetic field distribution, modular improvement of the threaded connection method, and integrated upgrade of the detection scheme using Hall effect components. This significantly enhances the overall structural stability, durability, and user experience.

[0166] Specifically, such as Figures 15 to 21 As shown, this embodiment provides a springless magnetic rebound button, including a base assembly 2 and a button assembly 8. The base 201 serves as a fixed platform for the entire structure, providing stable support for each component and ensuring the stability of the button assembly 8 during movement under magnetic force.

[0167] The button assembly 8 includes an upper button assembly 1 and a lower button assembly 3. The lower button assembly 3 passes through the sliding guide hole of the base 201 and is threadedly connected to the upper button assembly 1 to form an integral structure.

[0168] The upper button assembly 1 includes an upper housing 101, a first shock-absorbing layer 102, an upper moving magnetic element 4, and a first sealing layer 103. The first shock-absorbing layer 102 and the upper moving magnetic element 4 are sequentially installed at the bottom of a recessed mounting hole provided in the upper housing 101. The first sealing layer 103 is used to seal the entire mounting area, thereby ensuring that the area has good dustproof and waterproof performance.

[0169] The lower button assembly 3 includes a lower housing 301, a third shock-absorbing layer 302, a lower moving magnetic element 6, and a third sealing layer 303. The third shock-absorbing layer 302 and the lower moving magnetic element 6 are sequentially installed at the bottom of the recessed mounting hole provided in the lower housing 301, and the third sealing layer 303 completes the sealing and fixation, forming a good sealing environment.

[0170] The base assembly 2 includes a base 201, a second damping layer 202, a central fixed magnetic element 5, an upper damping and sealing layer 203, and a lower damping layer 204. The second damping layer 202 and the central fixed magnetic element 5 are sequentially disposed in the recessed mounting holes reserved in the base 201. The upper damping and sealing layer 203 is installed on and fixed to the upper end of the limiting structure of the base 201, and its lower part is provided with a boss structure, which can precisely match the mounting holes of the base 201 to achieve sealing and positioning of the central fixed magnetic element 5 and the second damping layer 202.

[0171] The shock-absorbing layer 204 under the base is set at the bottom of the limiting structure of the base 201 and fixed, providing additional cushioning for the button assembly 8 during the rebound process.

[0172] To enhance structural stability and sealing margin, the installation thickness of the first damping layer 102, the second damping layer 202, the third damping layer 302, and each magnetic component in their corresponding mounting holes is less than the depth of the corresponding mounting holes; the size of the damping and sealing layer 203 on the base and the damping layer 204 on the base is less than or equal to the limiting structure of the base 201, ensuring that the button assembly 8 will not get stuck during movement.

[0173] The upper housing 101 has an internal thread structure, and the lower housing 301 has an external thread structure that mates with it. The lower button assembly 3 passes through a sliding guide hole provided in the base 201 and is threadedly connected to the upper button assembly 1 through the aforementioned threaded connection method, forming a complete button assembly 8. This threaded connection method facilitates quick disassembly and maintenance. Preferably, the connection method can also be replaced with other equivalent structural forms such as snap-fit ​​or welding, depending on specific needs.

[0174] In the unpressed state, the axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 is greater than the axial distance between the middle fixed magnetic element 5 and the lower moving magnetic element 6. At this time, the magnetic poles of the adjacent end faces of the lower moving magnetic element 6 fixed to the lower housing 301 and the middle fixed magnetic element 5 fixed in the base 201 are opposite, and they attract each other; the magnetic poles of the adjacent end faces of the upper moving magnetic element 4 fixed to the upper housing 101 and the middle fixed magnetic element 5 fixed in the base 201 are the same, and they repel each other.

[0175] Under the combined action of the two magnetic forces, a net upward magnetic support force is formed, enabling precise contact between the lower housing 301 in the lower button assembly 3 and the lower surface of the shock-absorbing layer 204 under the base. When the button assembly 8 is in the preset initial position, this contact constitutes the initial positioning in the vertical direction, thereby achieving reliable structural support and magnetic guidance.

[0176] When the weight of the button assembly 8 and the applied pressing force exceed the combined force of the attractive force between the lower moving magnetic element 6 and the middle fixed magnetic element 5 and the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5, the relative axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 increases rapidly, and the attractive force between them decreases sharply. At this time, the combined action of magnetic force and gravity causes the button assembly 8 to generate instantaneous acceleration, resulting in a significant displacement change, providing clear and strong physical feedback, improving operational accuracy and response speed, and ensuring the reliability of button operation.

[0177] As the button assembly 8 continues to move vertically downward, the axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually increases, and the attraction between the two decreases sharply; the axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually decreases, and the repulsive force between the two gradually increases, and the pressing resistance gradually increases, forming a progressive tactile feedback.

[0178] When the upper housing 101 on the button assembly 8 makes precise contact with the upper surface of the shock-absorbing sealing layer 203 on the base, the shock-absorbing sealing layer 203 effectively absorbs the impact force, reduces vibration and noise, and alleviates the stress on the magnetic components through elastic deformation and damping, thereby protecting the magnetic components.

[0179] At this point, the forces reach dynamic equilibrium, the pressing resistance is stable, and the button assembly 8 is reliably positioned in the preset position under the support of the shock-absorbing sealing layer 203 on the base, ensuring its stability and repeatability in the vertical direction.

[0180] After the pressure on the button assembly 8 is released, the externally applied pressure is removed, and the button assembly 8 automatically rebounds under the constant magnetic force, achieving a stable and reliable reset action. In the initial stage of rebound, the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5 plays a dominant role, driving the button assembly 8 to quickly begin to move upward. As the button assembly 8 gradually moves upward, the relative axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually increases, and the repulsive force between them gradually weakens; at the same time, the axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually decreases, and the attractive force between them gradually strengthens, further promoting the rebound process.

[0181] When the interior of the lower housing 301 is in precise contact with the lower surface of the base damping layer 204, the base damping layer 204 effectively absorbs the impact force, reduces vibration and noise, and alleviates the stress on the magnetic components through elastic deformation and damping, thereby protecting the magnetic components.

[0182] At this point, the forces reach a dynamic equilibrium, the pressing resistance stabilizes, the forces reach a balance, the resistance remains stable, and the button assembly 8 returns to the preset initial position.

[0183] When the button assembly 8 rebounds to the preset initial position, due to the fast rebound speed, the lower housing 301 makes precise contact with the lower surface of the base damping layer 204, instantly generating a certain mechanical vibration and forming a brief sound feedback.

[0184] The shock-absorbing layer 204 under the base weakens excessive impact through local deformation and buffering, avoiding damage to magnetic components from hard contact, while retaining appropriate sound feedback to provide users with clear auditory confirmation information and enhance the tactile feedback of button operation.

[0185] The Hall component 7 is located below the button component 8 and includes a Hall component housing 701 and a Hall sensor 702 installed therein.

[0186] In this embodiment, the button assembly 8 has a lower moving magnetic element 6, which interacts magnetically with the middle fixed magnetic element 5 fixed inside the base assembly 2. As the button assembly 8 moves, the position of the lower moving magnetic element 6 changes, causing a corresponding change in the local magnetic field strength. The Hall sensor 702 in the Hall assembly 7 located below the button assembly 8, based on the Hall effect, can sense this magnetic field change in real time and convert it into a corresponding electrical signal to detect the button operation status.

[0187] Meanwhile, the button structure of this invention can be adapted to various sensor components, enabling bidirectional trigger detection during button press and rebound. The working principles based on different sensors are explained in detail below:

[0188] Bidirectional trigger detection based on Hall sensor:

[0189] The upper moving magnetic element 4 and the lower moving magnetic element 6 are respectively fixedly installed in the upper housing 101 and the lower housing 301 of the button assembly 8, and are coaxially arranged with the middle fixed magnetic element 5 fixedly installed inside the base 201.

[0190] When the button assembly 8 is in the initial position, the lower moving magnetic element 6 and the Hall sensor 702 maintain a set initial distance, and the Hall sensor outputs an electrical signal corresponding to the initial magnetic field strength.

[0191] When external pressure is applied, causing the button assembly 8 to move downwards, the lower moving magnetic element 6 gradually approaches the Hall sensor 702, and the local magnetic field strength increases accordingly. According to the Hall effect, the migration state of charge carriers inside the Hall sensor changes, and an electrical signal that changes with the magnetic field outputs. The system can determine that the button has been pressed based on the detected signal change, achieving the first trigger, i.e., press trigger.

[0192] When the external pressure is released, the button assembly 8 rebounds under the influence of magnetic repulsion and attraction. As the lower moving magnetic element 6 gradually moves away from the Hall sensor 702, the local magnetic field strength gradually weakens. The Hall sensor detects the change in the magnetic field and outputs a change signal again. Based on this change, the system can determine that the button has rebounded to its initial position, achieving a second trigger, i.e., rebound trigger.

[0193] Therefore, by monitoring the continuous magnetic field of the Hall sensor, this embodiment can achieve bidirectional trigger detection of the button assembly 8 during the pressing and rebound process, ensuring that the system can accurately perceive the complete action path of the button and improve the accuracy and reliability of the input response.

[0194] Specifically, if the Hall sensor 702 is replaced with a magnetoresistive sensor, its working principle is also based on the influence of magnetic field changes on sensor characteristics.

[0195] When the button assembly 8 is in its initial position, the lower moving magnetic element 6 maintains a certain distance from the magnetoresistive sensor. At this time, the magnetoresistive sensor is in its initial resistance state and outputs an electrical signal corresponding to the initial magnetic field environment.

[0196] When the button assembly 8 is subjected to external pressure, it moves downward, and the lower moving magnetic element 6 approaches the magnetoresistive sensor. The change in magnetic field strength causes a change in the resistance value of the magnetoresistive sensor. Since the magnetoresistive sensor is connected to a specific circuit, the change in resistance causes a change in current or voltage in the circuit. The system detects this change in electrical signal and can determine that the button has been pressed, completing the first trigger, i.e., the press trigger.

[0197] When the button assembly 8 rebounds, the lower moving magnetic element 6 gradually moves away from the magnetoresistive sensor, the magnetic field strength weakens, the resistance value of the magnetoresistive sensor changes again, and the electrical signal changes accordingly. Based on this signal change, the system determines that the button has rebounded to its initial position, realizing a second trigger, i.e., rebound trigger.

[0198] By using magnetoresistive sensors to sensitively detect changes in magnetic fields, bidirectional trigger detection can also be achieved during the pressing and rebound of buttons. Furthermore, in certain application scenarios with special requirements for power consumption and size, magnetoresistive sensors can provide more suitable solutions due to their inherent characteristics.

[0199] Bidirectional trigger detection based on photoelectric sensors.

[0200] When using a photoelectric sensor, the optical path must be carefully designed to correlate changes in the position of the button assembly 8.

[0201] When the button assembly 8 is in the initial position, the optical path is in the initial state, the photoelectric sensor receives a stable light signal and outputs a corresponding initial electrical signal.

[0202] Press-triggered: When the button assembly 8 is pressed down, the movement of the button changes the propagation path of light. For example, changes in obstruction, reflection, or refraction cause a change in the intensity of the light signal received by the photoelectric sensor. The photoelectric sensor converts the change in light signal into a change in electrical signal. The system detects this signal change and determines that the button has been pressed, completing the first trigger, i.e., press-triggered.

[0203] Rebound trigger: When button assembly 8 rebounds, the light propagation path is restored, the light signal received by the photoelectric sensor changes again, and the output electrical signal also changes accordingly. The system determines that the button has rebounded to the initial position based on this change in electrical signal, realizing the second trigger, i.e., rebound trigger.

[0204] Photoelectric sensors utilize the correlation between light signals and changes in the position of button components to achieve non-contact bidirectional trigger detection, avoiding the wear problems that may occur with traditional contact sensors, and are suitable for applications with high durability requirements.

[0205] It should be understood that the installation positions of the Hall sensor, magnetoresistive sensor, and photoelectric sensor are not limited to the specific positions shown in the embodiments. Depending on the structural design of the button assembly, the size and specifications of the magnetic elements, the fixing arrangement of the magnetic elements (including the arrangement direction of the magnetic array, the distribution of magnetic poles), and actual detection requirements, the sensor assembly can be flexibly placed below, to the side of, or in other positions that can effectively sense physical changes within the button assembly.

[0206] As long as the sensor can detect changes in magnetic field or optical properties caused by button movement and output a corresponding electrical signal, its installation location should be considered part of the protection scope of this utility model. This flexibility ensures the wide applicability and scalability of this utility model in different application scenarios.

[0207] Optional implementation: Design of a flexible material coating layer.

[0208] In an optional embodiment of this invention, to further enhance the overall structural protection, a flexible material covering layer can be provided on the exterior of the button assembly 8. This covering layer covers the outer surfaces of the upper housing 101 and the lower housing 301 of the button, and fits tightly against the button base 201, forming a closed and elastic sealed space. This design effectively prevents the entry of dust, moisture, and other pollutants from the external environment, thereby improving the environmental adaptability and protection level of the button assembly 8, and ensuring that the internal magnetic components remain in a stable working state under various environmental conditions for a long period.

[0209] Specifically, the flexible material is preferably a polymeric elastomer, such as silicone or thermoplastic elastomers, which possess excellent resilience, weather resistance, sealing properties, and cushioning performance. During the movement of the button assembly 8, when an external force causes displacement of the assembly, the flexible material stores elastic potential energy due to deformation and releases it rapidly after the external force is released, providing the necessary reaction force to ensure the rapid rebound of the button assembly 8. Furthermore, the flexible material coating layer effectively reduces mechanical fatigue and component wear risks while absorbing vibration and impact, further extending the product's service life.

[0210] It should be noted that the aforementioned flexible material covering layer is not shown in the accompanying drawings; it is one of the protective structural design options that can be understood and chosen by those skilled in the art. This design not only improves the feel of the button assembly 8 and avoids the harsh feedback caused by direct collisions between rigid structures, but also effectively suppresses high-frequency vibration noise, optimizing the overall auditory experience and operational precision.

[0211] Example 4

[0212] like Figures 22 to 26As shown, this embodiment provides a springless magnetic rebound button. Based on the magnetic cooperation mechanism of embodiment 1, this embodiment addresses the high requirements of portable electronic devices and micro control terminals for structural compactness and space utilization efficiency. The structure used between the upper housing 101 and the lower housing 301 in the traditional button assembly 8 usually has problems such as a large number of parts, complex assembly, and low space utilization efficiency, which restricts the miniaturization of the product.

[0213] To solve the above problems, this embodiment introduces a second button unit 9 to replace the button assembly 8 in embodiment 1, and optimizes the sliding guide hole structure of the base 201 so that it can cooperate with the movement of the guide column 901 to meet the movement requirements of the second button unit 9 in the axial direction.

[0214] The second button unit 9 includes a guide post 901, bosses 902 and 903 at its upper and lower ends, an upper moving magnetic element 4, and a lower moving magnetic element 6.

[0215] The guide column 901 is integrally formed and has an upper boss 902 and a lower boss 903, which are used to fix the upper moving magnetic element 4 and the lower moving magnetic element 6, respectively, to ensure the relative position stability of the magnetic elements and facilitate the precise fit and reliable operation of the overall structure. The base assembly 2 includes a base 201 and a central fixed magnetic element 5 fixed in its mounting hole.

[0216] The mounting holes of the base 201 are optimized to accommodate and securely mount the central fixed magnetic element 5, and to ensure that it is coaxially arranged with the upper moving magnetic element 4 and the lower moving magnetic element 6 in the axial direction.

[0217] This structure not only achieves stable axial positioning of the magnetic components, but also simplifies the overall layout, effectively improving the system's integration and assembly efficiency.

[0218] To optimize the uniformity of the magnetic field distribution and improve structural stability, the upper moving magnetic element 4, the middle fixed magnetic element 5, and the lower moving magnetic element 6 are all designed as hollow ring structures and are arranged coaxially from top to bottom along the axial direction.

[0219] Among them, the upper moving magnetic element 4 and the lower moving magnetic element 6 have the same outer diameter and inner diameter, while the middle fixed magnetic element 5 has an inner diameter that matches the sliding guide hole of the base 201, and an outer diameter that matches the other magnetic elements.

[0220] The hollow structure of the centrally fixed magnetic element 5 cooperates with the sliding guide hole of the base 201 to form a continuous vertical guide channel. This guide channel provides stable vertical guidance for the guide column 901, ensuring smooth operation during axial movement and effectively preventing shaking, tilting, or jamming.

[0221] To accommodate manufacturing and assembly tolerances, a small gap is reserved between the guide channel and the guide post 901, which ensures smooth movement and improves the system's operational reliability. Furthermore, the outer diameters of the upper moving magnetic element 4 and the lower moving magnetic element 6 are larger than the outer diameter of the guide post 901. This dimensional fit achieves structural limiting, ensuring reliable movement of the second button unit 9 within its predetermined stroke.

[0222] In this embodiment, to further improve the system's durability and electrical safety, the surfaces of the upper moving magnetic element 4, the middle fixed magnetic element 5, and the lower moving magnetic element 6 are all covered with a flexible coating. This coating is closely attached to the magnetic element, together forming a stable integrated protective structure, which is not separately distinguished in the accompanying drawings.

[0223] During the pressing and releasing process, the flexible coating can absorb mechanical shocks and vibrations, reduce wear and structural fatigue of magnetic components caused by collisions, and thus extend the service life of the system. At the same time, relying on its excellent electrical insulation properties, it can prevent electrical contact between magnetic components and surrounding conductive parts, prevent short circuits, leakage and other faults, and ensure the safety and reliability of the entire device in various electrical environments.

[0224] In summary, this embodiment achieves a simplified button structure design by introducing the guide post 901 and optimizing the layout of the hollow coaxial magnetic components, significantly reducing the system size and meeting the requirements of microelectronic applications with high integration and high stability.

[0225] Specifically, when the second button unit 9 is pressed, if the applied vertical pressing force and the weight of the second button unit 9 exceed the combined force of the attractive force between the lower moving magnetic element 6 and the middle fixed magnetic element 5 and the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5, the relative axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 increases rapidly, and the attractive force decreases sharply. At this time, the combined action of magnetic force and gravity causes the second button unit 9 to generate instantaneous acceleration, resulting in a significant displacement change, providing clear and strong physical feedback, improving operational accuracy and response speed, and ensuring the reliability of button operation.

[0226] As the pressure continues, the second button unit 9 continues to move vertically downwards. The axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually increases, and the attractive force decreases sharply. The axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually decreases, and the repulsive force between them gradually increases, thus increasing the pressing resistance and forming a progressive tactile feedback.

[0227] When the lower surface of the upper moving magnetic element 4 on the second button unit 9 contacts the upper surface of the middle fixed magnetic element 5, the second button unit 9 reaches the fully pressed state. At this time, the forces are balanced, the pressing resistance remains stable, and the second button unit 9 is reliably positioned in the preset position, ensuring its stability and repeatability in the vertical direction.

[0228] After the pressure on the second button unit 9 is released, the externally applied pressure is relieved, and the second button unit 9 automatically rebounds under the constant magnetic force, achieving a stable and reliable reset action. In the initial stage of rebound, the repulsive force between the upper moving magnetic element 4 and the middle fixed magnetic element 5 plays a dominant role, driving the second button unit 9 to quickly begin to move upward. As the second button unit 9 gradually moves upward, the relative axial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 gradually increases, and the repulsive force between them gradually weakens; at the same time, the axial distance between the lower moving magnetic element 6 and the middle fixed magnetic element 5 gradually decreases, and the attractive force between them gradually strengthens, further promoting the rebound process.

[0229] When the upper surface of the lower moving magnetic element 6 makes precise contact with the lower surface of the base 201, the forces are balanced, the rebound resistance remains stable, and the second button unit 9 returns to the preset initial position.

[0230] Throughout the entire pressing and rebound process, the flexible coating continuously provides cushioning, shock absorption, and electrical isolation, reducing the risk of mechanical shock and current, and significantly improving the stability and reliability of the button system. Simultaneously, audible feedback is generated at the moment of structural contact at the rebound end, providing users with clear auditory cues and enhancing the interactive experience.

[0231] Preferred structure of Example 4:

[0232] In a preferred configuration, the guide post 901 can be replaced by a structure consisting of a detachably connected upper connecting section 904 and a lower connecting section 905, which are combined to form a whole through a connecting structure. The connecting structure can be a threaded connection or a snap-fit ​​connection, etc., to adapt to different assembly requirements and structural design requirements.

[0233] like Figures 27 to 31 As shown, the guide column 901 is replaced by the upper connecting section 904 and the lower connecting section 905, which are connected by a threaded structure in the middle to form the core structure of the second button unit 9.

[0234] The upper connecting section 904 is provided with an internal thread, and its upper end is provided with a mounting hole for installing and fixing the upper moving magnetic element 4; the lower connecting section 905 is provided with an external thread that mates with it, and its lower end is provided with a mounting hole for installing and fixing the lower moving magnetic element 6.

[0235] After the threaded connection is made, the structure cooperates with the base assembly 2 to form a guide structure, ensuring the controllable movement of the second button unit 9 in the axial direction.

[0236] By adjusting the engagement depth, the initial distance between the upper moving magnetic element 4 and the middle fixed magnetic element 5 can be adjusted within a certain range, thereby precisely optimizing the magnetic response curve and improving the button feel.

[0237] In addition, this adjustment mechanism can also simultaneously change the effective travel distance of the second button unit 9, adapting to the different needs for button sensitivity and travel length in different usage scenarios, further improving structural versatility and user experience.

[0238] It is worth mentioning that the segmented threaded connection design gives the second button unit 9 good modularity, which facilitates the quick disassembly and replacement of individual connecting sections or magnetic components during maintenance, repair or upgrade, reducing maintenance complexity and cost, and improving product maintainability and service life.

[0239] It should be understood that the above threaded connection is only one of the preferred embodiments. The connection structure is not limited to threaded connections; it can also be a snap-fit ​​connection, a plug-in connection, or other structural forms that can achieve a connection. The connection structure can be freely selected according to actual usage requirements and structural design. It can be a detachable structure or a non-detachable integrated structure. The specific method does not constitute a limitation on this utility model.

[0240] Preferably, the connection structure is a detachable connection structure, such as a threaded connection, a snap-fit ​​connection with a release mechanism, or a plug-in connection, to facilitate later maintenance, replacement, or modular assembly.

[0241] The snap-fit ​​connection can be further subdivided into detachable snap-fit ​​structures and non-detachable snap-fit ​​structures. Preferably, a detachable snap-fit ​​structure with a release mechanism is used, such as by pressing, sliding, twisting, or using tools to achieve disassembly, thereby completing repeated assembly and disassembly operations without damaging the connector.

[0242] The detachable snap-fit ​​structure enables quick assembly and stable positioning of the connecting sections through snap-fit ​​components. Although it does not have continuous adjustment capabilities, it has significant advantages in assembly efficiency and structural stability, and is especially suitable for use environments with high requirements for ease of maintenance.

Claims

1. A springless magnetic return key, characterized in that, The device includes a base assembly and a button assembly. The base assembly has a sliding guide hole that allows the button assembly to slide through. The sliding guide hole accommodates and provides the vertical axial movement space required by the button assembly. The button assembly includes a lower button assembly and an upper button assembly. The lower button assembly passes through the sliding guide hole and is detachably connected to the upper button assembly. A magnetic block mounting part is provided in the middle of the sliding guide hole. The upper button assembly has an upper moving magnetic element embedded inside, the magnetic block mounting part has a middle fixed magnetic element embedded inside, and the lower button assembly has a lower moving magnetic element embedded at the bottom. The upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are arranged coaxially from top to bottom. The adjacent end faces of the upper moving magnetic element and the middle fixed magnetic element have the same magnetic poles, and the two form a repulsive force. The adjacent end faces of the lower moving magnetic element and the middle fixed magnetic element have opposite magnetic poles, and the two form an attractive force. When not pressed, the repulsive force is less than the attractive force. The base assembly is provided with a limiting structure that restricts the vertical position of the button assembly.

2. A springless magnetic reed key according to claim 1, wherein In the unpressed state, the axial distance between the upper moving magnetic element and the middle fixed magnetic element is smaller than the axial distance between the middle fixed magnetic element and the lower moving magnetic element. When not pressed, the repulsive force between the upper moving magnetic element and the middle fixed magnetic element is less than the attractive force between the lower moving magnetic element and the middle fixed magnetic element; the superposition of the repulsive and attractive forces forms an upward supporting force, which reliably positions the lower button assembly and the upper button assembly in the preset initial position.

3. A springless magnetic reed key according to claim 1, wherein, The upper button assembly includes an upper housing and an upper mounting hole on the lower surface of the upper housing for mounting the upper moving magnetic element. The depth of the upper mounting hole is greater than the thickness of the upper moving magnetic element. The lower button assembly includes a lower housing and a lower mounting hole on the lower surface of the lower housing for mounting the lower moving magnetic element. The depth of the lower mounting hole is greater than the thickness of the lower moving magnetic element.

4. A springless magnetic rebound button according to claim 3, characterized in that, The upper mounting hole and the lower mounting hole are provided with a shock-absorbing layer and a sealing layer.

5. A springless magnetic rebound button according to claim 3, characterized in that, The limiting structure is clearance-fitted with the lower housing, and a certain amount of movement clearance is reserved.

6. A springless magnetic rebound button according to claim 1, characterized in that, The limiting structure has a shock-absorbing layer at both the bottom and top, and the shock-absorbing layer is made of silicone or polyurethane.

7. A springless magnetic rebound button according to claim 3, characterized in that, The magnetic block mounting part is provided with a central threaded mounting groove inside, and a central adjusting screw sleeve with adjustable position is provided in the central threaded mounting groove. The central fixed magnetic element is installed in the mounting hole of the central adjusting screw sleeve. The upper mounting hole is an upper threaded mounting groove, and an upper adjusting screw sleeve with adjustable position is provided in the upper threaded mounting groove. The upper fixed magnetic element is installed in the mounting hole of the upper adjusting screw sleeve. The lower mounting hole is a lower threaded mounting groove, and an adjustable lower adjusting screw sleeve is provided in the lower threaded mounting groove. The lower fixed magnetic element is installed in the mounting hole of the lower adjusting screw sleeve.

8. A springless magnetic rebound button according to claim 1, characterized in that, The upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are all flat structures, ring structures, or other geometric shapes with similar magnetic flux distribution and magnetic conduction effects.

9. A springless magnetic rebound button according to claim 1, characterized in that, The upper moving magnetic element, the middle fixed magnetic element, and the lower moving magnetic element are made of one or more of neodymium iron boron permanent magnets, ferrite permanent magnets, samarium cobalt alloy permanent magnets, and aluminum nickel cobalt alloy permanent magnets.

10. A springless magnetic rebound button according to claim 3, characterized in that, The button assembly is covered with a flexible material coating layer, which is a polymer elastomer material.

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