Touch input unit based on pressure-sensitive conversion

Abstract

The utility model relates to a touch input unit based on pressure-sensitive conversion, which is characterized in that an operator slides on a pressure-bearing structure, so that the pressure applied to the pressure-bearing structure can be transmitted to an elastic pressure-sensitive layer through a support conversion column, and the elastic pressure-sensitive layer can elastically deform after being subjected to the pressure; due to the fact that the supporting conversion column is arranged in the middle of the elastic pressure-sensitive layer, deformation of the elastic pressure-sensitive layer on the two sides of the supporting conversion column is different, and the deformation state of the elastic pressure-sensitive layer can also change along with change of the pressure applying position. And at the moment, the sliding direction of the operator can be judged according to the change of the deformation state of the elastic pressure-sensitive layer, so that the pressure-sensitive touch operation is realized. Compared with the prior art, the touch input unit based on pressure-sensitive conversion does not need to additionally arrange a touch module, and the purpose of simplifying the structure and wiring of a pressure touch design can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-sensitive touch control, and in particular to a touch input unit based on pressure-sensitive conversion. Background Art

[0002] With the popularization and development of electronic consumer products, pressure touch technology has also been widely used in electronic products. Its main function is to accurately identify the user's force and identify relevant information about the pressure, such as the size, direction, and position of the force, and then match different control and response methods based on this information, so that electronic products can have a variety of service modes and functions.

[0003] Conventional pressure touch designs often include a touch module for identifying sliding trajectories and a pressure sensing module for sensing pressure. The structure and wiring of the two are relatively complex when combined, and cannot meet the current requirements for lightweight and miniaturized consumer electronic products. Utility Model Content

[0004] In order to solve the defects of the conventional pressure touch design in terms of structure and wiring complexity, the present invention proposes a touch input unit based on pressure conversion.

[0005] The technical solution adopted by the present invention is a touch input unit based on pressure conversion, including a pressure-bearing structure, a support conversion column and an elastic pressure-sensitive layer arranged in sequence in the thickness direction, and the two ends of the support conversion column are respectively fixedly connected to the middle position of the pressure-bearing structure and the middle position of the elastic pressure-sensitive layer.

[0006] Preferably, the elastic pressure-sensitive layer is a strip-shaped structure or a cross-shaped structure.

[0007] Preferably, the supporting conversion column is a parallelepiped.

[0008] Preferably, the elastic pressure-sensitive layer includes an elastic structure and a pressure-sensitive layer, and the pressure-sensitive layer is attached to a side of the elastic structure away from the supporting conversion column.

[0009] Preferably, both ends of the elastic pressure-sensitive layer extend outward to form a limiting portion, and a side of the limiting portion close to the pressure-bearing structure abuts against the external housing.

[0010] Preferably, the elastic pressure-sensing layer includes two pairs of strain resistors, the two pairs of strain resistors form a Wheatstone bridge, and the angle between the strain direction of each pair of strain resistors and the length direction of the elastic pressure-sensing layer is greater than or equal to 0° and less than 90°.

[0011] Preferably, a feedback structure is connected on a side of the elastic pressure-sensitive layer away from the supporting conversion column, or between the pressure-bearing structure and the elastic pressure-sensitive layer;

[0012] When the feedback structure is compressed to a threshold value, a structural mutation occurs, and a feedback signal is generated when the structural mutation occurs.

[0013] Preferably, a feedback structure is connected to the side of the elastic pressure-sensitive layer away from the support conversion column. The feedback structure is a pot piece, and two pot pieces are respectively located on both sides of the support conversion column.

[0014] Preferably, the pot piece and the elastic pressure-sensitive layer are signal-connected.

[0015] Preferably, an identification layer is connected to a side of the pressure-bearing structure away from the support conversion column, and the identification layer and the elastic pressure-sensing layer are connected through a flexible circuit, and the flexible circuit is arranged in contact with the support conversion column.

[0016] In order to solve the defects of the existing technology that the pressure touch design occupies a large space and cannot meet the requirements of lightweight and miniaturized consumer electronic products, the present invention proposes an electronic interactive device.

[0017] The present application also discloses an electronic interactive device, comprising the above-mentioned touch input unit based on pressure conversion.

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

[0019] The present application discloses a touch input unit based on pressure conversion, wherein a pressure-bearing structure, a support conversion column, and an elastic pressure-sensitive layer are arranged in sequence in the thickness direction and connected by a support conversion column at a position between the pressure-bearing structure and the elastic pressure-sensitive layer. The pressure-bearing structure serves as an input end for external pressure and is used to receive pressure signals, and the elastic pressure-sensitive layer is used to identify pressure and has elastic deformation. The operator applies pressure at different positions on the pressure-bearing structure, and the pressure applied at different positions can be obtained by sliding, so that the pressure applied to the pressure-bearing structure can be transmitted to the elastic pressure-sensitive layer through the support conversion column. After the elastic pressure-sensitive layer is subjected to pressure, it can itself undergo elastic deformation. Since the support conversion column is arranged at a position in the middle of the elastic pressure-sensitive layer, the deformation of the elastic pressure-sensitive layer on both sides of the support conversion column is different, and as the position of pressure application changes, the deformation state of the elastic pressure-sensitive layer will also change. At this time, the position where the operator applies pressure can be determined based on the change in the deformation state of the elastic pressure-sensitive layer, thereby realizing pressure-sensitive sliding touch operation. Compared with the prior art, the touch input unit based on pressure conversion disclosed in the present application does not require an additional touch module. At the same time, it can identify sliding signals and pressure signals through an extremely simple structure, thereby achieving the purpose of simplifying the structure and wiring of the pressure touch design.

[0020] This application also discloses an electronic interactive device that incorporates a touch input unit based on pressure conversion, reducing the space occupied by existing pressure touch designs, thereby making the electronic interactive device lighter and smaller. Compared to existing technologies, the electronic interactive device disclosed in this application can achieve the goal of lightweighting and miniaturizing current consumer electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 A schematic structural diagram of a touch input unit based on pressure conversion provided in accordance with an embodiment of the present utility model is shown;

[0023] Figure 2 A schematic diagram showing a partial structure of an electronic interactive device provided according to an embodiment of the present utility model is shown;

[0024] Figure 3 is a schematic diagram of the arrangement of strain resistors in the elastic pressure-sensing layer in an embodiment;

[0025] Figure 4 yes Figure 3 Schematic diagram of a Wheatstone circuit formed by strain gauge resistors in the elastic pressure-sensing layer in an embodiment.

[0026] Description of labels:

[0027] 10. Pressure-bearing structure; 11. Button; 12. Structural parts;

[0028] 20. Support conversion column;

[0029] 30. Elastic pressure-sensitive layer; 31. Pressure-sensitive layer; 32. Elastic structure; 33. Position-limiting portion; 34. Flexible circuit;

[0030] 40. Feedback structure;

[0031] 50. Identification layer;

[0032] 60. External casing;

[0033] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] This utility model discloses a touch input unit based on pressure conversion, please refer to Figure 1 and Figure 2 , including a pressure-bearing structure 10, a support conversion column 20 and an elastic pressure-sensitive layer 30 arranged in sequence in the thickness direction, and the two ends of the support conversion column 20 are fixedly connected to the middle position of the pressure-bearing structure 10 and the middle position of the elastic pressure-sensitive layer 30 respectively.

[0036] The pressure-bearing structure 10, the support conversion column 20, and the elastic pressure-sensing layer 30 are arranged sequentially in the thickness direction and connected by the support conversion column 20 at the middle position between the pressure-bearing structure 10 and the elastic pressure-sensing layer 30. The pressure-bearing structure 10 serves as the input end for external pressure and is used to receive pressure signals. The elastic pressure-sensing layer 30 is used to identify pressure and has elastic deformation. When an operator slides on the pressure-bearing structure 10, the pressure applied to the pressure-bearing structure 10 is transmitted to the elastic pressure-sensing layer 30 through the support conversion column 20. After the elastic pressure-sensing layer 30 is subjected to pressure, it can undergo elastic deformation. Because the support conversion column 20 is arranged at the middle position of the elastic pressure-sensing layer 30, the deformation of the elastic pressure-sensing layer 30 on both sides of the support conversion column 20 is different. As the pressure application position changes, the deformation state of the elastic pressure-sensing layer 30 also changes. At this time, the operator's sliding direction can be determined based on the change in the deformation state of the elastic pressure-sensing layer 30, thereby realizing pressure-sensitive touch operation. Compared with the prior art, the touch input unit based on pressure conversion disclosed in the present application does not require an additional touch module. At the same time, it can identify sliding signals and pressure signals through an extremely simple structure, thereby achieving the purpose of simplifying the structure and wiring of the pressure touch design.

[0037] Among them, the operator applies different amounts of force on the pressure-bearing structure 10, so that the pressure applied to the pressure-bearing structure 10 can be transmitted to the elastic pressure-sensitive layer 30 through the support conversion column 20. After the elastic pressure-sensitive layer 30 is subjected to pressure, it can undergo elastic deformation. Different amounts of force can cause different degrees of deformation of the elastic pressure-sensitive layer 30, and the corresponding output signal amount will also be different, that is, the amount of pressure applied by the operator can be judged, and then the pressure-sensitive sliding touch operation can be realized.

[0038] Specifically, the touch input unit can be placed in a variety of ways according to its application scenario during actual use. The simplest placement method is to directly place the touch input unit on a desired placement plane. In this case, the elastic pressure-sensitive layer 30 is not required to be fixedly connected to the placement plane. When the operator presses down on the position of the support conversion column 20 on the pressure-bearing structure 10, the elastic pressure-sensitive layer 30 will deform at the connection position with the support conversion column 20, and the two ends of the elastic pressure-sensitive layer 30 will bend upward. At this time, there are at least two locations where deformation occurs (when recognizing one-dimensional touch); when the operator presses down on the position of the non-support conversion column 20 on the pressure-bearing structure 10, the elastic pressure-sensitive layer 30 will also deform at the connection position with the support conversion column 20, and the two ends of the elastic pressure-sensitive layer 30 will bend upward. The end of the elastic pressure-sensitive layer 30 at the pressed position will be pressed upward to cause deformation, while the end away from the pressed position will bend upward due to the lifting of the support conversion column 20, and no deformation will occur at this time. Therefore, when the operator presses at different positions, the elastic pressure-sensitive layer 30 produces different deformation states, thereby determining the touch sliding direction of the operator.

[0039] It should be noted that the two ends of the support conversion column 20 are fixedly connected to the middle position of the pressure-bearing structure 10 and the middle position of the elastic pressure-sensing layer 30, respectively. This means that at least in a certain direction of the support conversion column 20, the length of the pressure-bearing structure 10 and the length of the elastic pressure-sensing layer 30 are longer than the length of the support conversion column 20. In addition, the middle position refers to the position area between the two ends of the pressure-bearing structure 10 and the position area between the two ends of the elastic pressure-sensing layer 30 in the above-mentioned certain direction, and does not only refer to the midpoint position area of ​​the line segment.

[0040] In some embodiments, the elastic pressure-sensitive layer 30 is a strip-shaped structure or a cross-shaped structure.

[0041] Specifically, since the touch recognition function of the touch input unit is realized by recognizing the deformation state of the elastic pressure-sensitive layer 30, the touch function realized by the touch input unit varies with the shape of the elastic pressure-sensitive layer 30. Figure 1 and Figure 2 The touch input unit shown in the figure can be used to make a bar-shaped key. The bar-shaped structure is mainly conducive to realizing linear one-dimensional touch, and the sliding recognition direction of the touch is mainly concentrated in the arrangement direction of the bar structure. In this case, the shape of the pressure-bearing structure 10 is not limited. When the elastic pressure-sensitive layer 30 is a cross-shaped structure, it is mainly conducive to realizing planar two-dimensional touch, and the sliding recognition direction of the touch is mainly concentrated in the arrangement direction of the cross structure. If sliding recognition in other directions is required, it can be implemented with a specific algorithm.

[0042] It should be noted that, compared to using a single flat plate as the elastic pressure-sensing layer 30, the cross-shaped elastic pressure-sensing layer 30 can reduce mutual interference in the two intersecting directions, preventing deformation of the elastic pressure-sensing layer 30 in one direction from easily causing deformation in the other direction. This achieves the purpose of achieving better touch recognition effects during the pressure-sensing conversion process, which can significantly improve the accuracy of touch recognition. The cross-shaped structure can be considered to be the result of the intersection of two strip structures. It is not limited to the two strip structures intersecting at 90 degrees. In other embodiments, more strip structures can be intersected, for example, three strip structures can be intersected to form a cross-shaped structure.

[0043] In some specific embodiments, the support conversion column 20 is a parallelepiped.

[0044] Specifically, the support conversion column 20 is a parallelepiped with its top and bottom surfaces arranged in parallel. This ensures that the pressure-bearing structure 10 and the elastic pressure-sensitive layer 30, which are fixedly connected to each other, are also arranged in parallel, allowing the operator to achieve a more stable posture when applying pressure. Furthermore, the elastic pressure-sensitive layer 30 deforms more uniformly when subjected to pressure from the parallelepiped's edges. This allows the parallelepiped to better induce pressure deformation in both strip and cross configurations, thereby improving touch recognition accuracy.

[0045] The parallelepiped can be divided into a regular parallelepiped and an oblique parallelepiped. The oblique parallelepiped can change its deformation size on the elastic pressure-sensitive layer 30 while other conditions remain unchanged, thereby being applied to some asymmetric structural designs to meet the usage requirements in different scenarios.

[0046] In some embodiments, the elastic pressure-sensitive layer 30 includes an elastic structure 32 and a pressure-sensitive layer 31 , and the pressure-sensitive layer 31 is attached to a side of the elastic structure 32 away from the supporting conversion column 20 .

[0047] It should be noted that the elastic pressure-sensing layer 30 includes an elastic structure 32 and a pressure-sensing layer 31. The pressure-sensing layer 31 is attached to the side of the elastic structure 32 away from the support conversion column 20. The elastic structure 32 is elastic and can undergo elastic deformation. The pressure-sensing layer 31 adheres to the elastic structure 32 and can deform along with the elastic structure 32. The provision of the elastic structure 32 prevents direct contact between the support conversion column 20 and the pressure-sensing layer 31, which detects pressure, thereby extending the service life of the pressure-sensing layer 31.

[0048] In some specific embodiments, the support conversion column 20 and the elastic structure 32 are integrally formed.

[0049] Specifically, the elastic structure 32 frequently deforms during use of the touch input unit, making damage and failure at the connection between the support conversion column 20 and the elastic structure 32 extremely prone to occur. Therefore, by integrally forming the support conversion column 20 and the elastic structure 32, the strength at the connection is improved, making fatigue-induced damage and failure less likely. The support conversion column 20 and the elastic structure 32 can be made of the same material or different materials. When using the same material, different thicknesses can be used to achieve a certain degree of rigidity and desired elasticity.

[0050] In some embodiments, both ends of the elastic pressure-sensing layer 30 extend outward to form a limiting portion 33 , and a side of the limiting portion 33 close to the pressure-bearing structure 10 abuts against the external housing 60 .

[0051] Specifically, both ends of the elastic pressure-sensing layer 30 extend outward to form a limiting portion 33, that is, the elastic pressure-sensing layer 30 limits its own deformation state through the limiting portion 33, and the side of the limiting portion 33 close to the pressure-bearing structure 10 abuts against the external housing 60. The external housing 60 mentioned here refers to other external components, and is not limited to the housing.

[0052] Taking this embodiment as an example, when the operator presses down on the position of the support conversion column 20 on the pressure-bearing structure 10, the elastic pressure-sensing layer 30 will deform at the connection position with the support conversion column 20. At the same time, due to the limitation of the external housing 60, the elastic pressure-sensing layer 30 on both sides of the support conversion column 20 will arch upward. At this time, the entire elastic pressure-sensing layer 30 will deform. When the operator presses down on the position of the non-support conversion column 20 on the pressure-bearing structure 10, the elastic pressure-sensing layer 30 at the pressed position has a tendency to curl upward when under pressure, but due to the limitation of the external housing 60, it will not curl upward. The side away from the pressed position will arch upward due to the limitation of the external housing 60. Therefore, the deformation state of the elastic pressure-sensing layer 30 at different pressing positions is different, so that the touch sliding direction of the operator can be judged.

[0053] In some embodiments, please refer to Figure 3 and Figure 4 The elastic pressure-sensing layer includes two pairs of strain resistors, the two pairs of strain resistors form a Wheatstone bridge, and the angle between the strain direction of each pair of strain resistors and the length direction of the elastic pressure-sensing layer is greater than or equal to 0° and less than 90°.

[0054] Specifically, the elastic pressure-sensing layer includes at least one pair of strain resistors, and the strain direction of each pair of strain resistors forms an angle greater than or equal to 0° and less than 90° with the longitudinal direction of the elastic pressure-sensing layer. That is, the strain resistors can be arranged in the longitudinal direction of the elastic pressure-sensing layer, or at an angle of 15°, 30°, 60°, or other angles with the longitudinal direction of the elastic pressure-sensing layer. In this case, when the elastic pressure-sensing layer deforms along the longitudinal direction, the deformation and the corresponding force can be calculated using existing calculation methods.

[0055] In this embodiment, Figure 3-4 As shown, the elastic pressure-sensing layer includes two pairs of strain resistors, and the two pairs of strain resistors R1, R2, R3, and R4 are connected in sequence to form a Wheatstone bridge, which can improve the accuracy and stability of pressure sensing. When the pressure is input on the keycap, the elastic pressure-sensing layer will be subjected to force and its two ends will produce downward bending deformation. Since the strain direction of the two pairs of strain resistors is the same as the deformation direction or there is an angle between them, as the input pressure changes, the resistance values ​​of the two pairs of strain resistors will also change differently. According to the amount of the change, the magnitude of the pressure can be calculated. Among them, the sum of the forces on a pair of strain resistors can be determined as the pressure value of the input pressure. Of course, using two pairs of strain resistors can further improve the accuracy of pressure sensing.

[0056] In some embodiments, please refer to Figure 1 and Figure 2 A feedback structure 40 is connected on a side of the elastic pressure-sensitive layer 30 away from the supporting conversion column 20 , or between the pressure-bearing structure 10 and the elastic pressure-sensitive layer 30 ;

[0057] When the feedback structure 40 is compressed to a threshold value, a structural mutation occurs, and a feedback signal is generated when the structural mutation occurs.

[0058] It should be noted that the feedback structure 40 is used to provide feedback on pressure. After the operator applies a certain amount of pressure, the feedback structure 40 is pressurized to a threshold value, causing its own structure to mutate. When the mutation occurs, a feedback signal is generated, allowing the operator to determine that the pressure has been pressed in place. When used in combination with touch sensing and pressure sensing, more comprehensive human-computer interaction functions can be achieved.

[0059] In addition, when a feedback structure 40 is connected between the pressure-bearing structure 10 and the elastic pressure-sensitive layer 30, on the one hand, the volume of the touch input unit can be further reduced, thereby facilitating integration into a more compact and compact device; on the other hand, the feedback structure 40 can prevent the pressure-bearing structure 10 from directly contacting the elastic pressure-sensitive layer 30 during the downward pressure process, thereby ensuring accurate detection of the pressure signal.

[0060] In some specific embodiments, a feedback structure 40 is connected to the side of the elastic pressure-sensing layer 30 away from the support conversion column 20, and between the pressure-bearing structure 10 and the elastic pressure-sensing layer 30. The threshold values ​​of the pressure reaching the feedback structures 40 at the two locations are different. As the pressure gradually increases when the operator presses, the feedback structures 40 at the two locations will provide feedback in sequence, thereby achieving the purpose of multi-level feedback and achieving higher-quality human-computer interaction. Preferably, the threshold value of the feedback structure 40 connected between the pressure-bearing structure 10 and the elastic pressure-sensing layer 30 is greater than the threshold value of the feedback structure 40 connected to the side of the elastic pressure-sensing layer 30 away from the support conversion column 20, thereby preventing the pressure-bearing structure 10 from contacting the elastic pressure-sensing layer 30 when the pressure continues to increase, thereby affecting the deformation of the elastic pressure-sensing layer 30. The feedback signal of the feedback structure 40 connected between the pressure-bearing structure 10 and the elastic pressure-sensing layer 30 can be used as a warning signal to prompt the operator not to continue pressing.

[0061] In some specific embodiments, please refer to Figure 1 and Figure 2 A feedback structure 40 is connected to the side of the elastic pressure-sensitive layer 30 away from the support conversion column 20 . The feedback structure 40 is a pot piece, and two pot pieces are located on both sides of the support conversion column 20 respectively.

[0062] Specifically, the feedback structure 40 is composed of two metal domes, connected to the side of the elastic pressure-sensing layer 30 away from the support conversion column 20. The two metal domes are located on either side of the support conversion column 20. The metal domes are simple in structure, low in cost, and easy to maintain. When the pressure reaches a threshold, they emit sound and vibration signals, perfectly meeting the requirements of the feedback structure 40.

[0063] In addition to achieving the feedback function, the two pots also have the function of optimizing the deformation of the elastic pressure-sensitive layer 30, so that the elastic pressure-sensitive layer 30 can produce a larger deformation and the deformation of the elastic pressure-sensitive layer 30 is smoother, thereby improving the accuracy of touch judgment. When there are two pots and a limit portion 33, the embodiment at this time is used for illustration. When the operator presses down at the position supporting the conversion column 20 on the pressure-bearing structure 10, the elastic pressure-sensitive layer 30 between the two pots will arch downward under the pressure of the supporting conversion column 20; when the operator presses down at the position not supporting the conversion column 20 on the pressure-bearing structure 10, it will be abutted by the external housing 60, so the elastic pressure-sensitive layer 30 will arch downward on the side at the pressed position and arch upward on the side away from the pressed position, that is, when observed from the cross-section of the elastic pressure-sensitive layer 30, its deformation shape is roughly S-shaped. Since the directions of the arches are different, different deformation states can be obtained when pressing different positions, thereby determining the touch sliding direction of the operator.

[0064] In some more specific embodiments, the metal dome is signal-connected to the elastic pressure-sensitive layer 30. This allows the metal dome to function as a switch in addition to feedback and support. When an operator causes the metal dome to undergo a sudden change, the contact of the metal dome contacts the connection point, thereby generating a switch signal. Developers can then transmit the switch signal to other software and hardware devices to implement other functions.

[0065] In some particularly specific embodiments, the pot piece is connected to the pressure-sensitive layer 31 , which is more convenient to connect and can also make the size of the touch input unit smaller.

[0066] In other embodiments, the feedback structure 40 may also be other structures such as a piezoelectric igniter, which generates a photoelectric signal and an audio signal.

[0067] In some embodiments, an identification layer 50 is connected to the side of the pressure-bearing structure 10 away from the support conversion column 20 . The identification layer 50 and the elastic pressure-sensing layer 30 are connected via a flexible circuit 34 , and the flexible circuit 34 is arranged to fit the support conversion column 20 .

[0068] It should be noted that the identification layer 50 can be a functional structure such as a fingerprint module, a capacitor layer, etc., wherein the identification layer 50 and the elastic pressure-sensitive layer 30 are connected through a flexible circuit 34, and the flexible circuit 34 is arranged in contact with the support conversion column 20. On the one hand, the line direction is optimized, and on the other hand, it avoids the need for the identification layer 50 and the elastic pressure-sensitive layer 30 to be connected to the control unit separately.

[0069] In some specific embodiments, the pressure-bearing structure 10 includes a structural member 12 and a button 11 , wherein the identification layer 50 is disposed between the button 11 and the structural member 12 , thereby facilitating protection of the identification layer 50 .

[0070] This application also discloses an electronic interactive device, please refer to Figure 1 and Figure 2 , including the above-mentioned touch input unit based on pressure conversion.

[0071] By incorporating a touch input unit based on pressure conversion, the space occupied by the original pressure touch design is reduced, making the electronic interactive device lighter and smaller. Compared with the existing technology, the electronic interactive device disclosed in this application can achieve the goal of lightweighting and miniaturizing current consumer electronic products.

[0072] In this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example; furthermore, the specific features, structures, materials, or characteristics described may be appropriately combined in any one or more embodiments or examples.

[0073] In the description of this specification, the terms "connect," "install," "fix," "dispose," and "have" are to be understood in a broad sense. For example, "connect" can mean 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, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0074] In the description of this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0075] The above description of the embodiments is to facilitate ordinary technicians in this technical field to understand and apply the technology of this case. People familiar with the technology in this field can obviously make various modifications to these examples easily and apply the general principles described here to other embodiments without having to go through creative work. Therefore, this case is not limited to the above embodiments. Modifications to the following situations should all be within the scope of protection of this case: ① A new technical solution implemented based on the technical solution of this utility model and combined with existing common knowledge, the technical effect produced by the new technical solution does not exceed the technical effect of this utility model; ② The equivalent replacement of some features of the technical solution of this utility model with common technology, the technical effect produced is the same as the technical effect of this utility model; ③ The technical solution of this utility model can be expanded, and the substantive content of the expanded technical solution does not exceed the technical solution of this utility model; ④ The equivalent transformation made by using the contents of the description and drawings of this utility model is directly or indirectly applied to other related technical fields.

Claims

1. A touch input unit based on pressure conversion, characterized in that: It comprises a pressure-bearing structure, a support conversion column and an elastic pressure-sensitive layer arranged in sequence in the thickness direction, wherein two ends of the support conversion column are fixedly connected to the middle position of the pressure-bearing structure and the middle position of the elastic pressure-sensitive layer respectively.

2. The touch input unit based on pressure conversion according to claim 1, characterized in that: The elastic pressure-sensitive layer is a strip-shaped structure or a cross-shaped structure.

3. The touch input unit based on pressure conversion according to claim 2, characterized in that: The support conversion column is a parallelepiped.

4. The touch input unit based on pressure conversion according to claim 1, characterized in that: The elastic pressure-sensitive layer includes an elastic structure and a pressure-sensitive layer, and the pressure-sensitive layer is attached to a side of the elastic structure away from the support conversion column.

5. The touch input unit based on pressure conversion according to claim 1, characterized in that: Both ends of the elastic pressure-sensitive layer extend outward to form a limiting portion, and a side of the limiting portion close to the pressure-bearing structure abuts against the external housing.

6. The touch input unit based on pressure conversion according to claim 1, characterized in that: The elastic pressure-sensitive layer includes two pairs of strain resistors, which form a Wheatstone bridge. The angle between the strain direction of each pair of strain resistors and the length direction of the elastic pressure-sensitive layer is greater than or equal to 0° and less than 90°.

7. A touch input unit based on pressure conversion according to any one of claims 1 to 6, characterized in that: A feedback structure is connected on a side of the elastic pressure-sensitive layer away from the support conversion column, or between the pressure-bearing structure and the elastic pressure-sensitive layer; The feedback structure generates a structural mutation when the pressure reaches a threshold, and a feedback signal is generated when the structural mutation occurs.

8. The touch input unit based on pressure conversion according to claim 7, characterized in that: The feedback structure is connected to a side of the elastic pressure-sensitive layer away from the support conversion column. The feedback structure is a pot piece, and two pot pieces are respectively located on both sides of the support conversion column.

9. The touch input unit based on pressure conversion according to claim 8, characterized in that: The pot piece is signal-connected to the elastic pressure-sensing layer.

10. The touch input unit based on pressure conversion according to any one of claims 1 to 6, characterized in that: An identification layer is connected to the side of the pressure-bearing structure away from the support conversion column. The identification layer is a fingerprint module or a capacitor layer. The identification layer and the elastic pressure-sensitive layer are connected through a flexible circuit, and the flexible circuit is arranged in contact with the support conversion column.

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