A key module with press feedback equalization

Abstract

This utility model relates to a button module with balanced press feedback. A dome switch and a balancing structure are provided between the bottom of the button body and the housing. The top edge of the button body is located inside the housing and abuts against the inner wall of the housing. The balancing structure is elastic, compressible under pressure, and able to return to its original shape when released. The balancing structure is closer to the bottom edge of the button body than the dome switch. When the user presses down on the top edge of the button body, the pressed area moves downwards, while the top edge on the other side of the button body is prevented from moving upwards due to the abutment against the inner wall of the housing. During the pressing process, the balancing structure hinders the user's downward pressure, thereby increasing the required pressure when pressing down on the edge of the button body, and causing the dome switch to vibrate mechanically at a certain point. Compared with the prior art, this application can achieve balanced feedback to improve the feedback experience.

Description

Technical Field

[0001] This utility model relates to the field of pressure-sensitive button technology, and in particular to a button module with balanced press feedback. Background Technology

[0002] With the popularization and development of electronic consumer products, pressure feedback technology has also been widely used in electronic products. Its main function is to provide feedback based on the pressure applied by the user, allowing the user to intuitively feel the amount of pressure they apply, thereby enabling electronic products to have a variety of service modes and functions.

[0003] Currently, the pressure feedback structure commonly used in electronic devices is a dome switch (spring switch). A dome switch is set at the bottom of the button to abut against the button. When the button is pressed, the dome switch is squeezed and causes the dome switch to generate mechanical vibration feedback.

[0004] However, because the contact point of the dome switch is very small, while the keycap is relatively long, pressing near the edge of the key creates a lever structure. This results in a much lower force required to trigger the dome switch when pressing near the edge compared to pressing the center of the keycap. Furthermore, since the dome switch is often located in the middle of the bottom of a long keycap, the key may not feel firm enough and is prone to wobbling, affecting the pressing experience. All of these factors contribute to a poor user experience. Utility Model Content

[0005] To address the shortcomings of poor user feedback, this invention proposes a button module with balanced press feedback.

[0006] The technical solution adopted by this utility model is a button module with balanced press feedback, including a button body, a dome switch and at least one elastic balancing structure between the bottom of the button body and the housing, the balancing structure being closer to the bottom edge of the button body than the dome switch, and the top edge of the button body being located inside the housing and abutting against the inner side wall of the housing.

[0007] Preferably, the thickness of the hot plate is the same as the thickness of the balanced structure.

[0008] Preferably, there is one dome switch, which is located in the middle area at the bottom of the button body. There are two equalization structures, which are located on both sides of the dome switch and are spaced equidistant from each other.

[0009] Preferably, the balancing structure is at least one of a spring, a silicone block, and a foam block.

[0010] Preferably, the balancing structure is a spring sheet, which is formed by bending a plate-like structure. The angle formed by the first bending surface and the second bending surface of the spring sheet is an acute angle or an obtuse angle. One of the button body and the housing is fixedly connected to the first bending surface, and the other is slidably connected to the end of the second bending surface.

[0011] Preferably, the second bending surface has an arc-shaped curved surface, and the convex side of the arc-shaped curved surface is slidably connected to the button body or the housing.

[0012] Preferably, the sidewall of the button body is sealed to the housing by a flexible silicone structure, with one end of the flexible silicone structure fixedly connected to the sidewall of the button body and the other end fixedly connected to the housing.

[0013] Preferably, it also includes a circuit connection layer, the dome switch is a metal dome switch, the circuit connection layer and the metal dome switch are electrically connected, and the balancing structure is a metal spring, which is soldered onto the circuit connection layer.

[0014] Preferably, there is a strain sensing layer between the button body and the dome switch, which is fixedly supported by the dome switch, and there is a first deformation space between the strain sensing layer and the button body to allow the strain sensing layer to deform.

[0015] Preferably, it further includes a capacitor layer electrically connected to the strain sensing layer, the capacitor layer being disposed above the first deformation space.

[0016] Preferably, a strain sensing layer is fixedly supported by a support block between the button body and the dome switch, and a first deformation space for the strain sensing layer to deform is provided between the strain sensing layer and the button body. A support plate is fixedly connected to the end of the support block away from the strain sensing layer, and a second deformation space for the strain sensing layer to deform is provided between the support plate and the strain sensing layer. The top edge of the support plate abuts against the inner wall of the casing.

[0017] Preferably, the strain sensing layer is connected to two strain sensing devices, which are located on the left and right sides of the center of the support block, respectively.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This application discloses a button module with balanced press feedback. A dome switch and a balancing structure are provided between the bottom of the button body and the housing. The top edge of the button body is located inside the housing and abuts against the inner wall of the housing. The balancing structure is elastic, compressible under pressure, and able to recover when released. The balancing structure is closer to the bottom edge of the button body than the dome switch. When the user presses down on the top edge of the button body, the pressed area moves downwards, while the top edge on the other side of the button body is prevented from moving upwards and tilting due to the abutment against the inner wall of the housing. During the pressing process, the balancing structure hinders the user's downward pressure, thereby increasing the required pressure when pressing down on the edge of the button body. At a certain point, the dome switch experiences mechanical vibration feedback, ensuring that the force triggering the dome switch when pressing on the edge of the button body is close to or equal to the force triggering the dome switch when pressing on the center of the button body. Simultaneously, the balancing structure also provides support for the button body, reducing or preventing button body wobbling.

[0020] Compared with the prior art, the button module with balanced press feedback disclosed in this application can achieve balanced feedback to improve the feedback experience. Attached Figure Description

[0021] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0022] Figure 1 A schematic diagram of a button module with balanced press feedback provided according to an embodiment of the present invention is shown.

[0023] Figure 2 It shows that according to Figure 1 A schematic diagram of a button module with reverse-mounted dome switch and equalization structure for press feedback equalization is provided.

[0024] Figure 3 It shows that according to Figure 1 A schematic diagram of a flexible silicone structure in a button module with balanced press feedback is provided.

[0025] Figure 4 A schematic diagram of another button module with balanced press feedback provided according to an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram of a flexible silicone structure in a button module with balanced press feedback according to an embodiment of the present invention is shown.

[0027] Figure 6 A schematic diagram of the equalization structure of a button module with equalized press feedback provided according to an embodiment of the present invention is shown.

[0028] Label Explanation:

[0029] 10. Button body;

[0030] 20. Housing;

[0031] 30. Pot-fried sliced ​​noodles;

[0032] 40. Balanced structure; 41. First bending surface; 42. Second bending surface; 43. Arc-shaped surface;

[0033] 50. Flexible silicone structure; 51. Anti-tear allowance;

[0034] 60. Circuit connection layer;

[0035] 70. Strain sensing layer; 71. First deformation space; 72. Second deformation space; 73. Support block; 74. Support plate; 75. Flexible circuit. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] This utility model discloses a button module with balanced press feedback. Please refer to [reference needed]. Figures 1 to 6 The device includes a button body 10, with a dome switch 30 and at least one elastic equalizing structure 40 provided between the bottom of the button body 10 and the housing 20. The equalizing structure 40 is closer to the bottom edge of the button body 10 than the dome switch 30. The top edge of the button body 10 is located inside the housing 20 and abuts against the inner side wall of the housing 20.

[0038] A dome switch 30 and a balancing structure 40 are provided between the bottom of the button body 10 and the housing 20. The top edge of the button body 10 is located inside the housing 20 and abuts against the inner wall of the housing 20. The balancing structure 40 is elastic, compressible when pressed, and able to return to its original shape when released. The balancing structure 40 is closer to the bottom edge of the button body 10 than the dome switch 30. When the user presses down on the top edge of the button body 10, the pressed area moves downwards, while the top edge on the other side of the button body 10 is prevented from moving upwards and lifting due to the abutment of the inner wall of the housing 20. During the pressing process, the balancing structure 40 hinders the user's downward pressure, thereby increasing the required pressure when pressing down on the edge of the button body 10. When pressed to a certain position, the dome switch 30 undergoes mechanical vibration feedback, so that the force triggering the dome switch 30 when pressing on the edge of the button body 10 is close to or equal to the force triggering the dome switch 30 when pressing on the center of the button body 10. Meanwhile, the equalization structure 40 also provides support for the button body 10, reducing or preventing the button body 10 from wobbling. This ensures a tight assembly along the entire length of the button module, resulting in minimal difference in the actuation force of the dome switch 30 when pressed at different positions on the button body 10, thus improving the user experience. Compared to existing technologies, the button module with balanced press feedback disclosed in this application achieves balanced feedback to enhance the user experience.

[0039] It should be noted that the metal dome 30 in this application includes other types of vibrating springs that can generate mechanical vibration when compressed, and this application does not limit the quantity or manufacturing materials of the metal dome 30.

[0040] When multiple dome switches 30 are used, at least one equalizing structure 40 can still be closer to the bottom edge of the button body 10 than the dome switches 30, thereby increasing the required pressure when the edge of the button body 10 is pressed down.

[0041] When there is only one equalization structure 40, it still has an obstructive effect when the button body 10 is pressed down at the position where the equalization structure 40 is set, thereby increasing the required pressure when the edge of the button body 10 is pressed down.

[0042] The button body 10 has a top and a bottom, wherein the top is for the user to press, the bottom is opposite to the top, and the edge in this application refers to the portion of the area including the edge and close to the edge.

[0043] The top edge of the button body 10 is located inside the housing 20 and abuts against the inner wall of the housing 20. It is not required that the entire top edge of the button body 10 abuts against the inner wall of the housing 20; only a portion of the edge may abut against the inner wall of the housing 20, or against other components connected to the housing. The purpose is simply to prevent upward movement and warping. It should be noted that the housing 20 is only used to illustrate the structure that mates with the button module, and it is not limited to being the outer casing of a device containing the button module. For example, when the button module of this application is installed in a mobile phone, it does not necessarily abut against the phone casing; it may abut against other components connected to the phone casing.

[0044] The housing 20 is not limited to a single-piece structure in this application; it may also include multiple structural components. For example, a dome switch 30 and at least one elastic equalizing structure 40 are provided between the bottom of the button body 10 and the first structural component. The top edge of the button body 10 is located inside the housing 20 and abuts against the inner sidewall of the second structural component. The first and second structural components may be separate or integrated, and both the first and second structural components are part of the housing 20.

[0045] In some embodiments, please refer to Figures 1 to 5 The thickness of the dome plate 30 is the same as the thickness of the balanced structure 40.

[0046] Specifically, this application preferably makes the thickness of the dome switch 30 the same as the thickness of the equalization structure 40, thereby providing better support for the button body 10 and improving the feedback experience.

[0047] The comparison of the thickness of the dome switch 30 and the thickness of the balancing structure 40 is for the assembled button module. Furthermore, during assembly, the thickness of the balancing structure 40 can be greater than the thickness of the dome switch, and after assembly, the thickness of the balancing structure 40 can be equal to the thickness of the dome switch, thereby compressing the balancing structure 40 and giving the button module a certain preload to prevent it from shaking. Alternatively, during assembly, the thickness of the balancing structure 40 can be less than the thickness of the dome switch, and after assembly, the thickness of the balancing structure 40 can be equal to the thickness of the dome switch, thereby compressing the dome switch and giving the button module a certain preload to prevent it from shaking.

[0048] In the assembled button module, in other embodiments, the thickness of the dome switch 30 and the thickness of the equalization structure 40 may also be different.

[0049] In some specific embodiments, to ensure that the feedback pressure value of the button body 10 at the location of the dome switch 30 and the location of the balancing structure 40 is the same, the balancing structure 40 can have two sections with different elastic coefficients. When pressure is applied to the balancing structure 40 of the button body 10, the section with the lower elastic coefficient deforms first, and as pressure continues to be applied, the section with the higher elastic coefficient deforms until the dome switch 30 vibrates. When pressure is applied to the dome switch 30 of the button body 10, only the section with the lower elastic coefficient deforms until the dome switch 30 vibrates. Since the compression of the balancing structure 40 is greater when pressed at the edge, and the excess compression is adjusted using the section with the higher elastic coefficient, the feedback pressure value at the location of the dome switch 30 and the balancing structure 40 can be adjusted to be the same. The specific elastic coefficient needs to be determined based on the location and the number of balancing structures 40.

[0050] In other embodiments, the thickness of the equalizing structure 40 can be greater than or less than the thickness of the dome switch 30. Simultaneously, it can be adjusted whether the bottom of the button body 10 and the housing 20 need to both contact the dome switch 30 and the equalizing structure 40. For example, when the thickness of the dome switch 30 is greater than the thickness of the equalizing structure 40, and one of the button body 10 or the housing 20 is not in contact with the equalizing structure 40, the initial pressing action of the button body 10 is not hindered by the elasticity of the equalizing structure 40. Instead, the button body 10 is pressed down a certain distance until the top and bottom of the equalizing structure 40 contact the bottom of the button body 10 and the housing 20, respectively. Only then will it be hindered by the equalizing structure 40, thus achieving the function described in this application. The advantage of this design is that when pressing the middle of the button body 10, it is not hindered by the equalizing structure 40, thereby maintaining the pressing pressure equal to the pressure feedback value of the dome switch 30.

[0051] In some embodiments, please refer to Figures 1 to 5 There is one dome switch 30, which is located in the middle area of ​​the bottom of the button body 10. There are two equalization structures 40, which are located on both sides of the dome switch 30 and are spaced equidistant from the dome switch 30.

[0052] Specifically, in order to make the pressure feedback value easy to adjust and to make the overall button module structure more stable and compact, and to further improve the pressure balance when pressing on both sides of the dome switch 30, the number of dome switches 30 is set to one and placed in the middle area of ​​the bottom of the button body 10, and the number of equalization structures 40 is set to two and placed at the same distance on both sides of the dome switch 30.

[0053] In other embodiments, there is one dome switch 30, which is located in the middle area of ​​the bottom of the button body 10. There are four equalization structures 40, which are respectively located in the orthogonal direction of the dome switch 30 and are spaced at the same distance from the dome switch 30.

[0054] In some embodiments, the balancing structure 40 is at least one of a spring, a silicone block, and a foam block.

[0055] In other embodiments, the balancing structure 40 may also be selected from other structures with flexibility.

[0056] In some embodiments, please refer to Figures 1 to 6 The equalization structure 40 is a spring sheet, which is formed by bending a plate-like structure. The angle formed by the first bending surface 41 and the second bending surface 42 of the spring sheet is an acute angle or an obtuse angle. One of the button body 10 and the housing 20 is fixedly connected to the first bending surface 41, and the other is slidably connected to the end of the second bending surface 42.

[0057] It should be noted that the balancing structure 40 is a spring formed by bending a plate-like structure. The spring has a first bending surface 41 and a second bending surface 42. When the first bending surface 41 and the second bending surface 42 are arranged in the button module, the included angle is not a right angle. As the pressing pressure increases, the acute angle formed by the first bending surface 41 and the second bending surface 42 will gradually decrease, or the obtuse angle formed by the first bending surface 41 and the second bending surface 42 will gradually increase. After the pressing pressure is stopped, the first bending surface 41 and the second bending surface 42 can return to their original angle. During the angle change process, the end of the second bending surface 42 will slide with one of the button body 10 and the housing 20, so that the angle can change smoothly.

[0058] It should be explained that, since the second bending surface 42 is fixedly connected to the first bending surface 41, it only has one end that is away from the first bending surface 41.

[0059] In some specific embodiments, the second bending surface 42 has an arcuate surface 43, and one side of the arcuate surface 43 is slidably connected to the button body 10 or the housing 20.

[0060] Specifically, in order to make the sliding connection between the end of the second bent surface 42 and one of the button body 10 and the housing 20 smoother and more seamless, thereby reducing the sticking sensation caused by sliding friction, the second bent surface 42 has an arc-shaped curved surface 43, and the convex side of the arc-shaped curved surface 43 is slidably connected to it, thereby improving the feedback experience. It should be noted that the sliding connection in this application includes a scrolling method.

[0061] In some specific embodiments, the spring is a metal spring.

[0062] In some embodiments, please refer to Figures 1 to 5 It also includes a circuit connection layer 60, and the dome switch 30 is a metal dome switch 30. The circuit connection layer 60 and the metal dome switch 30 are electrically connected.

[0063] It should be noted that the button module also includes a circuit connection layer 60, and the dome switch 30 is a metal dome switch 30. In other embodiments, it can also be made of plastic or other materials. The circuit connection layer 60 can be electrically connected to the metal dome switch 30, so that the circuit connection layer 60 can receive the vibration signal and / or trigger signal of the metal dome switch 30.

[0064] In some embodiments, the equalization structure 40 is a metal spring that is soldered onto the circuit connection layer 60.

[0065] Specifically, to facilitate assembly of the metal spring, the metal spring is soldered onto the circuit connection layer 60. The circuit connection layer 60 can be disposed on the housing 20 or on the button body 10.

[0066] In other embodiments, the spring or other equalization structure 40 can be bonded, welded or snapped to the bottom of the button body 10 or the housing 20.

[0067] In some embodiments, please refer to Figures 1 to 5 The sidewall of the button body 10 is sealed with the housing 20 by a flexible silicone structure 50. One end of the flexible silicone structure 50 is fixedly connected to the sidewall of the button body 10, and the other end is fixedly connected to the housing 20.

[0068] The flexible silicone structure 50 enables the button module to be waterproof and dustproof. At the same time, the flexible silicone is flexible and can support the normal use of the button module. When the top edge of the button body 10 is pressed, the flexible silicone structure 50 will not be damaged due to pulling.

[0069] In some specific embodiments, the flexible silicone structure 50 has a tear-resistant allowance 51, which further protects the flexible silicone structure 50 from damage due to pulling.

[0070] In some embodiments, please refer to Figure 4 There is a strain sensing layer between the button body and the dome switch, which is fixed and supported by the dome switch. There is a first deformation space 71 between the strain sensing layer and the button body to allow the strain sensing layer to deform.

[0071] Specifically, in order to enable the button module to recognize the pressure level, a strain sensing layer 70 is also provided. The strain sensing layer 70 can be supported by the dome switch 30. When pressure is applied, the strain sensing layer 70 can deform within the first deformation space 71 at the location of the dome switch 30, thereby recognizing the pressure level applied by the user.

[0072] In some specific embodiments, a capacitor layer electrically connected to the strain sensing layer is also included, the capacitor layer being disposed above the first deformation space.

[0073] The strain sensing layer can be used in conjunction with other functions of the circuit connection layer. For example, if the circuit connection layer also has a capacitor layer, the capacitor layer can be placed above the strain sensing layer. See reference [for more details]. Figure 4 The capacitor layer can be combined with the strain sensing layer to realize the functions of touch sliding recognition and pressure recognition.

[0074] It should be noted that the strain sensing layer can be considered as part of the circuit connection layer, so the dome switch and equalization structure can also be set or soldered on the strain sensing layer.

[0075] In this embodiment, the location of the balancing structure 40 is not limited. Preferably, the balancing structure is placed outside the region below the first deformation space 71, so that the balancing structure 40 does not affect the deformation of the strain sensing layer within the first deformation space 71. Of course, in other embodiments, the balancing structure 40 can also be placed within the region below the first deformation space 71, which would require establishing a more complex force change model.

[0076] In some embodiments, please refer to Figure 5 Between the button body and the dome switch, there is a strain sensing layer fixedly supported by the support block 73. Between the strain sensing layer and the button body, there is a first deformation space 71 for the strain sensing layer to deform. At the end of the support block 73 away from the strain sensing layer, there is a support plate 74 fixedly connected. Between the support plate 74 and the strain sensing layer, there is a second deformation space 72 for the strain sensing layer to deform. The top edge of the support plate 74 abuts against the inner wall of the casing.

[0077] Specifically, in order to enable the button module to recognize the pressure level and touch swipe recognition, a strain sensing layer 70 is also provided. The strain sensing layer 70 can be supported by the support block 73 and the support plate 74. When pressure is applied, the strain sensing layer 70 can deform in the first deformation space 71 and the second deformation space 72 at the location of the dome switch 30. When the user presses, the user can identify the pressure level and the direction of touch swipe based on the different deformation trends of the strain sensing layer 70 in the first deformation space 71 and the second deformation space 72.

[0078] In some specific embodiments, the strain sensing layer is connected to two strain sensing devices, which are located on the left and right sides of the center of the support block, respectively.

[0079] The strain sensing layer contains at least two strain sensors, located on the left and right sides of the center, respectively. When pressure is applied, the location of the pressure can be determined by the relative magnitudes of the outputs from these two strain sensors, and the magnitude of the pressure can be determined by the sum of the outputs from these two strain sensors.

[0080] Furthermore, the top edge of the support plate 74 abuts against the inner wall of the housing. This allows the abutting position to be closer to the dome switch and the equalizing structure, making the button module less prone to wobbling. It should be noted that the support plate 74 and the support block can also be considered as part of the button body.

[0081] In this embodiment, the position of the equalization structure 40 is not limited. The position of the equalization structure 40 relative to the second deformation space 72 does not affect the normal use of this embodiment. Whether the equalization structure 40 is located inside or outside the area below the second deformation space will not affect the deformation of the strain sensing layer.

[0082] In some specific embodiments, the strain sensing layer 70 and the circuit connection layer can be connected by a flexible circuit 75, thereby obtaining a more compact structure and a more adaptable arrangement. Please refer to the specific connection location. Figure 4 and Figure 5 .

[0083] In the description of this specification, the terms "Embodiment 1," "this embodiment," or "in one embodiment," etc., indicate that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0084] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0085] In the description of this specification, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0086] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can readily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this utility model and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this utility model; ② Equivalent substitutions of some features of the technical solution of this utility model using known technology, resulting in the same technical effects as those of this utility model; ③ Extendable technical solutions based on the technical solution of this utility model, where the substantive content of the extended technical solution does not exceed the technical solution of this utility model; ④ Equivalent transformations made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A key module with press feedback equalization, characterized by, The device includes a button body, with a dome switch and at least one elastic balancing structure between the bottom of the button body and the housing. The balancing structure is closer to the bottom edge of the button body than the dome switch. The top edge of the button body is located inside the housing and abuts against the inner wall of the housing.

2. The key module of claim 1, wherein, The thickness of the dome switch is the same as the thickness of the balanced structure.

3. The key module of claim 1, wherein, The number of the dome switch is one, and the dome switch is located in the middle area of ​​the bottom of the button body. The number of the equalization structure is two, and the two equalization structures are respectively located on both sides of the dome switch and are spaced equidistant from the dome switch.

4. The key module of claim 1, wherein, The balancing structure is at least one of the following: a spring, a silicone block, and a foam block.

5. The key module of claim 1, wherein, The equalization structure is a spring sheet, which is formed by bending a plate-like structure. The angle formed by the first bending surface and the second bending surface of the spring sheet is an acute angle or an obtuse angle. One of the button body and the housing is fixedly connected to the first bending surface, and the other is slidably connected to the end of the second bending surface.

6. The key module of claim 5, wherein, The second bending surface has an arc-shaped curved surface, and the convex side of the arc-shaped curved surface is slidably connected to the button body or the housing.

7. The key module of claim 1, wherein, The sidewall of the button body is sealed to the housing through a flexible silicone structure. One end of the flexible silicone structure is fixedly connected to the sidewall of the button body, and the other end is fixedly connected to the housing.

8. The key module of claim 1, wherein, It also includes a circuit connection layer, wherein the dome switch is a metal dome switch, the circuit connection layer and the metal dome switch are electrically connected, and the balancing structure is a metal spring, which is welded onto the circuit connection layer.

9. The key module of claims 1 to 8, wherein, A strain-sensing layer is provided between the button body and the dome switch, and a first deformation space is provided between the strain-sensing layer and the button body for the strain-sensing layer to deform.

10. The key module of claim 9, wherein, It also includes a capacitor layer electrically connected to the strain sensing layer, the capacitor layer being disposed above the first deformation space.

11. A button module with balanced press feedback according to any one of claims 1 to 8, characterized in that, A strain-sensing layer is fixedly supported by a support block between the button body and the dome switch. A first deformation space for deformation of the strain-sensing layer is provided between the strain-sensing layer and the button body. A support plate is fixedly connected to one end of the support block away from the strain-sensing layer. A second deformation space for deformation of the strain-sensing layer is provided between the support plate and the strain-sensing layer. The top edge of the support plate abuts against the inner wall of the housing.

12. The key module of claim 11, wherein, The strain sensing layer is connected to two strain sensing devices, which are located on the left and right sides of the center of the support block, respectively.

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