Pressure touch device, touch screen assembly and electronic equipment

Abstract

The utility model relates to a pressure touch device, a touch screen assembly and electronic equipment, and the device comprises an elastic part which comprises a fixed section and a bent section, the other end of the bent section is suitable for abutting against the bottom surface of a pressure input structure, the fixed section is assembled on a supporting part, and at least one supporting point is formed on the fixed section; the deformation sensing layer is attached to the fixed section; the fixing part comprises a middle mounting part and an end deformation part, and the deformation part is arranged on one side of the supporting point and is close to the joint of the bent section and the fixed section; and the Wheatstone bridge structure is integrated in the deformation sensing layer, and at least part of resistors in the Wheatstone bridge structure are located at the deformation part. The deformation sensing layer is arranged on the fixed section of the elastic piece and then attached to the bottom of the supporting piece, other structures do not need to be arranged on the bent part of the elastic piece, attaching and manufacturing are convenient, manufacturing is easy, assembling is convenient and fast, and stress sensing is rapid and accurate.

Description

Technical Field

[0001] This application relates to the field of pressure touch technology, and in particular to a pressure touch device, a touch screen assembly, and an electronic device. Background Technology

[0002] Currently, touch control on screens and touchpads in consumer electronics such as mobile phones, tablets, and laptops is generally achieved through capacitive or resistive touch sensing. This type of touch provides relatively accurate touch location information, which can meet the needs of general application scenarios. However, in some specific or more complex operating scenarios, touch location information alone is insufficient. For example, in gaming scenarios, there are a large number of touch buttons. Placing too many touch button areas within the limited screen space not only affects the convenience of operation but also obstructs the display, impacting the user experience.

[0003] In related technologies, a pressure sensor is integrated at the bottom of the pressure input structure to detect pressure, thereby enabling the pressure input structure to be controlled by pressure. Generally, inclined elastic plates are arranged in the pressure input structure and support members, and a Wheatstone bridge structure is integrated on the elastic plates. The deformation of the elastic plates causes the strain-sensing resistor in the Wheatstone bridge to deform, thereby outputting an electrical signal.

[0004] However, when assembling the pressure sensing device onto electronic equipment, it is necessary to attach an integrated Wheatstone bridge structure to the elastic sheet and to attach and fix the bottom end of the elastic sheet to the support. The operation steps are cumbersome, the assembly is difficult, and defective products are prone to occur. Utility Model Content

[0005] This application provides a pressure touch device, a touch screen assembly, and an electronic device to solve the technical problems in the related art where integrating a pressure sensing device into a pressure input structure involves cumbersome operation steps, high assembly difficulty, and a high likelihood of defective products.

[0006] In a first aspect, a pressure-sensitive touch device is provided, comprising:

[0007] An elastic element includes a fixed section and a bent section, the bent section being arranged inclined to the fixed section, one end of the bent section being connected to the fixed section, and the other end of the bent section being adapted to abut against the bottom surface of the pressure input structure; the fixed section is assembled on a support member and forms at least one support point;

[0008] A deformation sensing layer is attached to the fixed section; the deformation sensing layer includes a mounting portion in the middle and a deformation portion at the end, the deformation portion being disposed on one side of the support point and close to the connection between the bending section and the fixed section;

[0009] A Wheatstone bridge structure, wherein the Wheatstone bridge structure is integrated within the deformation sensing layer, and at least a portion of the resistor in the Wheatstone bridge structure is located in the deformation portion; wherein,

[0010] When external pressure is input into the pressure input structure, the bending section and the fixed section deform under stress, and the deformation sensing layer deforms, causing at least a portion of the resistance in the Wheatstone bridge structure to deform, thereby generating a voltage signal.

[0011] In some embodiments, the Wheatstone bridge structure includes two first resistors and two second resistors, which are connected in series; the two first resistors are located in the mounting portion, and the two second resistors are located in the deformation portion.

[0012] In some embodiments, the deformation sensing layer is fixed between the fixed segment and the support member.

[0013] In some embodiments, a deformation gap is provided between the deformable part and the support member.

[0014] In some embodiments, the elastic element includes two bent segments, which are respectively connected to opposite sides of the fixed segment; the Wheatstone bridge structure is provided in two sets, which are respectively arranged close to the connection between the two elastic elements and the fixed segment.

[0015] In some embodiments, the bent section has a groove near the connection with the fixed section, so that the portion of the bent section near the fixed section is narrower.

[0016] In some embodiments, the end of the bent section that contacts the pressure input structure is curved or hemispherical, so that the bent section makes line contact or point contact with the pressure input structure.

[0017] In some embodiments, the pressure touch device further includes a conductive sheet attached to the bottom surface of the pressure input structure, the bent section being electrically connected to the conductive sheet and contacting the pressure input structure through the conductive sheet;

[0018] The deformation sensing layer is provided with a capacitance detection circuit, which is electrically connected to the bending section.

[0019] In a second aspect, a touch screen assembly is provided, including the pressure touch device described above.

[0020] Thirdly, an electronic device is provided, including the pressure touch device as described above, and / or, the touch screen assembly as described above.

[0021] The beneficial effects of the technical solution provided in this application include:

[0022] This application provides a pressure-sensitive touch device, a touchscreen assembly, and an electronic device. Pressing the pressure input structure causes deformation, resulting in deformation of the bending and fixing sections. The deformation-sensing layer deforms due to the presence of a deformation gap, while the mounting section of the deformation-sensing layer remains undeformed because it is fixed to the support member by a first adhesive layer. In the Wheatstone bridge structure, the resistance deforms along with the deformation-sensing layer to generate a voltage signal. Therefore, the minute deformation of the pressure input structure can be converted into an electrical signal for output, realizing pressure-sensitive touch functionality, meeting more touch needs, providing better touch effects and experience, and exhibiting excellent performance. Since the deformation-sensing layer is located behind the fixing section of the elastic member and adheres to the bottom of the support member, and the bending section of the elastic member does not require other structures, during assembly, only the deformation-sensing layer and the fixing section of the elastic member need to be adhered together to the support member, facilitating bonding manufacturing, simplifying manufacturing, and making assembly convenient. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the pressure-sensitive touch device provided in the embodiments of this application;

[0025] Figure 2 This is a partial structural schematic diagram of the pressure-sensitive touch device provided in the embodiments of this application;

[0026] Figure 3 A top view of the pressure-sensitive touch device provided in the embodiments of this application;

[0027] Figure 4 A schematic diagram of the Wheatstone bridge structure provided in the embodiments of this application;

[0028] Figure 5 Schematic diagram of the pressure touch device provided in other embodiments of this application;

[0029] Figure 6 A schematic diagram of an electronic device equipped with a pressure-sensitive touch device, provided for other embodiments of this application.

[0030] In the diagram: 1. Elastic element; 11. Fixed section; 12. Bending section; 12a. Groove; 2. Deformation sensing layer; 21. Mounting part; 22. Deformation part; 3. First adhesive layer; 4. Second adhesive layer; 5. Wheatstone bridge structure; 51. First resistor; 52. Second resistor; 6. Conductive sheet; 7. Pressure input structure; 8. Support element; a. Deformation gap; b. Support point; A. Pressure touch device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] This application provides a pressure-sensitive touch device, a touch screen assembly, and an electronic device. The deformation-sensing layer of the pressure-sensitive touch device is disposed behind the fixed section of an elastic element and adhered to the bottom of a support member. The bent portion of the elastic element does not require any other structure. During assembly, only the deformation-sensing layer and the fixed section of the elastic element need to be adhered together to the support member, facilitating bonding and manufacturing, simplifying manufacturing, and making assembly convenient. This application solves the technical problems in related technologies where integrating a pressure sensing device into a pressure input structure involves cumbersome operation steps, high assembly difficulty, and a high likelihood of defective products.

[0033] Reference Figure 1 and Figure 2 A pressure-sensitive touch device includes an elastic element 1, a deformation sensing layer 2, and a Wheatstone bridge structure 5. The Wheatstone bridge structure 5 is integrated into the deformation sensing layer 2, which is attached to the elastic element 1 and can deform along with it. The elastic element 1 is installed between a pressure input structure 7 and a support member 8. The elastic element 1 deforms with the deformation of the pressure input structure, causing the internal resistance of the deformation sensing layer 2 and the Wheatstone bridge structure 5 to change, thereby generating a voltage signal and realizing the pressure sensing function.

[0034] In this embodiment, the support member 8 includes the middle frame or back cover of a mobile phone, the middle frame or back cover of a tablet, the outer shell of a computer, etc.; the pressure input structure 7 includes a touch screen, a touchpad, a touch button panel, a drawing board, etc.

[0035] Reference Figure 1 and Figure 2 The elastic element 1 includes a fixed section 11 and a bent section 12. The bent section 12 is arranged inclined to the fixed section 11. One end of the bent section 12 is connected to the fixed section 11, and the other end of the bent section 12 is adapted to abut against the bottom surface of the pressure input structure 7.

[0036] Reference Figure 1 and Figure 2 Specifically, the elastic element 1 includes a fixed section 11 and a bent section 12. The bent section 12 is arranged inclined to the fixed section 11. One end of the bent section 12 is connected to the fixed section 11, and the other end of the bent section 12 is adapted to abut against the bottom surface of the pressure input structure 7. In this embodiment, the bent section 12 and the fixed section 11 are integrally bent, and the bend is a rounded transition. In this embodiment, the elastic element 1 is an elastic sheet material, which can be a metal part or a plastic part.

[0037] This configuration, with the bending section 12 and the fixed section 11 forming a rounded transition, reduces stress concentration between them, improves the elastic member 1's ability to maintain elastic recovery after multiple bends, and enhances reliability.

[0038] Reference Figures 1-3 Furthermore, a groove 12a is provided near the connection between the bent section 12 and the fixed section 11, that is, a groove 12a is provided near the bend of the elastic member 1 in the bent section 12, so that the width of the part of the bent section 12 near the fixed section 11 is narrower.

[0039] This configuration further increases the deformation of the elastic element 1 near the Wheatstone bridge structure 5, thereby resulting in a larger voltage signal output and more sensitive pressure sensing.

[0040] Reference Figures 1-3 A connection circuit is arranged within the deformation sensing layer 2. This connection circuit is used to electrically connect with an external detection circuit to transmit the voltage signal generated by the Wheatstone bridge structure 5 to the external detection circuit, which then converts it into a pressure signal output. One side of the deformation sensing layer 2 is attached to the bottom surface of the fixed section 11.

[0041] Reference Figures 1-3 Specifically, the deformation sensing layer 2 includes a PI film, a PET film, a PC film, or a flexible circuit board, etc. The deformation sensing layer 2 is flexible, can be disposed on the elastic member 1 and deform with the elastic member 1, and can easily be connected to the deformation sensing layer 2, so as to facilitate electrical connection with the Wheatstone bridge structure 5, so as to export the voltage signal generated by the Wheatstone bridge structure 5.

[0042] Reference Figures 1-3 In this embodiment, the pressure-sensitive device includes a second adhesive layer 4, and the deformation sensing layer 2 is bonded to the bottom surface of the fixed segment 11 through the second adhesive layer 4. The second adhesive layer 4 covers the top surface of the deformation sensing layer 2 and the bottom surface of the fixed segment 11 of the elastic member 1. As the fixed segment 11 deforms, the second adhesive layer 4 and the deformation sensing layer 2 deform together.

[0043] Specifically, the second adhesive layer 4 can deform along with the deformation sensing layer 2 as the fixed section 11 deforms, meaning the second adhesive layer 4 is elastic. In this embodiment, the second adhesive layer 4 includes acrylic adhesive, VHB, epoxy adhesive, acrylic adhesive, 502 adhesive, or UV adhesive, etc.

[0044] Reference Figures 1-3 The fixed section 11 is assembled on the support member 8 and forms at least one support point b.

[0045] Reference Figures 1-3 The pressure touch device also includes a first adhesive layer 3, which supports the deformation sensing layer 2. The deformation sensing layer 2 is bonded to the support member 8 through the first adhesive layer 3, so that the deformation sensing layer 2 and the fixing section 11 of the elastic member 1 are assembled together onto the support member 8, which facilitates bonding and manufacturing, and is simple to manufacture and easy to assemble.

[0046] In this embodiment, the deformation sensing layer 2 is fixed between the fixing section 11 and the support member 8. The first adhesive layer 3, the deformation sensing layer 2, and the second adhesive layer 4 are supported by the fixing section 11, forming a support point b. It can be understood that in this embodiment, the support point b is a support surface.

[0047] The deformation sensing layer 2 is attached to the fixed section 11. The deformation sensing layer 2 includes a mounting part 21 in the middle and a deformation part 22 at the end. The deformation part 22 is disposed on one side of the support point b and near the connection between the bending section 12 and the fixed section 11.

[0048] Reference Figures 1-3 Specifically, the deformation sensing layer 2 includes a mounting portion 21 in the middle and a deformation portion 22 at the edge, with the deformation portion 22 located near the connection between the bending section 12 and the fixing section 11. It should be noted that in this embodiment, dividing the deformation sensing layer 2 into the mounting portion 21 and the deformation portion 22 is merely to distinguish different parts of the deformation sensing layer 2 for ease of understanding, and does not indicate that the deformation sensing layer 2 comprises two single-unit structures.

[0049] Reference Figures 1-3 The first adhesive layer 3 is attached to the bottom surface of the mounting part 21, and a deformation gap a is left between the deformation part 22 and the support member 8. The arrangement of the deformation gap a allows the deformation part 22 of the deformation sensing layer 2 located at the deformation gap a to deform, while the mounting part 21 of the deformation sensing layer 2 located in the first adhesive layer 3 cannot deform due to the lack of deformation space.

[0050] This configuration, where the deformation sensing layer 2 is adhered to the support member 8 via the first adhesive layer 3, divides the deformation sensing layer 2 into a deformable deformation portion 22 and a non-deformable mounting portion 21. This facilitates the subsequent sensing of the deformation of the deformation sensing layer 2 to generate an electrical signal via the Wheatstone bridge structure 5.

[0051] In this embodiment, the first adhesive layer 3 includes acrylic adhesive, VHB, epoxy adhesive, acrylic adhesive, 502 adhesive, or UV adhesive, etc.

[0052] Reference Figures 2-4 The Wheatstone bridge structure 5 is integrated within the deformation sensing layer 2, and at least a portion of the resistors in the Wheatstone bridge structure 5 are located in the deformation section 22. The resistors located in the deformation section 22 deform along with the deformation of the deformation section 22, generating a voltage signal, thereby converting the pressure signal into a voltage signal and outputting it.

[0053] Reference Figures 2-4 Specifically, the Wheatstone bridge structure 5 includes two first resistors 51 and two second resistors 52, which are connected in series. The two first resistors 51 are located in the mounting section 21, and the two second resistors 52 are located in the deformation section 22. Because some resistors do not deform while others do, the voltage signal generated by the Wheatstone bridge structure 5 can be larger, resulting in more sensitive pressure sensing.

[0054] In other embodiments, all the resistors of the Wheatstone bridge structure 5 can be arranged in the deformation section 22.

[0055] In Wheatstone bridge structure 5, the resistors are all strain-sensing resistors, including metal strain wires, polymer strain resistors, silicon-based strain resistors, etc.

[0056] In this embodiment, the specific circuit diagram of the Wheatstone bridge structure 5 is as follows: Figure 4 As shown, R1 and R4 are the first resistors 51, and R2 and R3 are the second resistors 52.

[0057] Reference Figures 1-3 The elastic element 1 includes two bent segments 12, which are respectively connected to opposite sides of the fixed segment 11. In this embodiment, the elastic element 1 is bent twice to form the fixed segment 11 and the two bent segments 12. Two sets of Wheatstone bridge structures 5 are provided, arranged close to the connection points of the two elastic elements 1 and the fixed segment 11. This allows for the detection of the deformation magnitude of the two corresponding contact points on the pressure input structure 7, improving sensing sensitivity and resulting in excellent sensing performance.

[0058] In this embodiment, one end of the bent section 12 is in interference contact with the pressure input structure 7. This ensures the reliability of the connection between the elastic element 1 and the pressure input structure 7, thereby guaranteeing the sensitivity of the pressure sensing.

[0059] Reference Figures 1-3The end of the bent section 12 that contacts the pressure input structure 7 is curved or hemispherical, so that the bent section 12 and the pressure input structure 7 are in line contact or point contact. By designing the shape of the bent section 12, the contact area between the bent section 12 and the pressure input structure 7 is reduced, thereby improving the connection reliability between the bent section 12 and the pressure input structure 7.

[0060] In this embodiment, the elastic element 1 includes two bent sections 12, so the elastic element 1 and the pressure input structure 7 are in two interference contact, which balances the interference force and improves the long-term reliability.

[0061] Reference Figure 5 In some embodiments, the pressure touch device further includes a conductive sheet 6, one end of which abuts against the pressure input structure 7 via the conductive sheet 6. When there are multiple bent sections 12, the number of conductive sheets 6 corresponds to the number of bent sections 12.

[0062] A capacitance detection circuit is provided in the deformation sensing layer 2, and the capacitance detection circuit is electrically connected to the bending section 12.

[0063] With this configuration, for the non-metallic pressure input structure 7, a conductive sheet 6 can be attached to its bottom, positioned at the point where the elastic element 1 contacts the pressure input structure 7. This allows for a combination of capacitive touch and pressure-sensitive touch at the location of the conductive sheet 6 on the pressure input structure 7.

[0064] This allows for the combination of precise touch location recognition and precise pressure recognition.

[0065] The principle behind this capacitance is that the conductive sheet 6 is electrically connected to the elastic element 1, and the elastic element 1 is electrically connected to the connecting circuit in the deformation sensing layer 2, thus leading out the circuit and setting up a capacitance detection circuit. When a person's hand or other conductor approaches the conductive sheet 6 on the non-metallic pressure input structure, it will cause a change in capacitance, which will be detected by the capacitance detection circuit.

[0066] This application provides a pressure-sensitive touch device, a touch screen assembly, and an electronic device. Pressing the pressure input structure 7 causes it to deform, resulting in deformation of the bending section 12 and the fixed section 11. The deformation portion 22 of the deformation sensing layer 2 deforms due to the presence of the deformation gap a, while the mounting portion 21 of the deformation sensing layer 2 does not deform because it is fixed to the support member 8 by the first adhesive layer 3. The resistance in the Wheatstone bridge structure 5 deforms along with the deformation sensing layer 2 to generate a voltage signal. Therefore, the minute deformation of the pressure input structure 7 can be converted into an electrical signal for output, realizing the pressure-sensitive touch function, meeting more touch needs, providing better touch effects and experience, and exhibiting excellent performance. Since the deformation sensing layer 2 is disposed behind the fixed section 11 of the elastic member 1 and adheres to the bottom of the support member, and the bending portion of the elastic member 1 does not require other structures, during assembly, only the deformation sensing layer 2 and the fixed section 11 of the elastic member 1 need to be adhered together to the support member 8, facilitating bonding manufacturing, simplifying manufacturing, and making assembly convenient.

[0067] In a second aspect, a touch screen assembly is provided, including the pressure touch device A as described above.

[0068] Since the touch screen assembly includes the aforementioned pressure touch device A, the beneficial effects of the touch screen assembly are the same as those of the aforementioned pressure touch device A, and will not be described again here.

[0069] Reference Figure 6 Thirdly, an electronic device is provided, including the pressure-sensitive touch device A as described above, and / or the touchscreen assembly as described above. In this embodiment, the electronic device includes a mobile phone, tablet computer, laptop computer, television, etc.

[0070] Since the touch screen assembly includes the aforementioned pressure touch device A and / or the touch screen assembly described above, the beneficial effects of the touch screen assembly are the same as those of the aforementioned pressure touch device A and / or the touch screen assembly described above, and will not be repeated here.

[0071] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0072] It should be noted that in this application, 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 limitations, 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.

[0073] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pressure touch device, characterized by, It comprises: a resilient member, which comprises a fixed segment and a bent segment, the bent segment is arranged obliquely to the fixed segment, one end of the bent segment is connected to the fixed segment, and the other end of the bent segment is adapted to abut against the bottom surface of a pressure input structure; the fixed segment is assembled on a support and is formed with at least one support point; a deformation sensing layer, which is attached to the fixed segment; the deformation sensing layer comprises a mounting portion in the middle and a deformation portion at the end, the deformation portion is arranged on the side of the support point and is close to the connection between the bent segment and the fixed segment; a Wheatstone bridge structure, which is integrated in the deformation sensing layer, and at least part of the resistors in the Wheatstone bridge structure are located in the deformation portion; wherein, when the pressure input structure inputs external pressure, the bent segment and the fixed segment are deformed under stress, the deformation portion of the deformation sensing layer is deformed, and at least part of the resistors in the Wheatstone bridge structure are deformed to generate a voltage signal. 2.The pressure touch device according to claim 1, wherein, The Wheatstone bridge structure comprises two first resistors and two second resistors, the two first resistors and the two second resistors are cross-connected in series; the two first resistors are located in the mounting portion, and the two second resistors are located in the deformation portion. 3.The pressure touch device according to claim 1, wherein, The deformation sensing layer is fixed between the fixed segment and the support. 4.The pressure touch device of claim 1, wherein, A deformation gap is left between the deformation portion and the support. 5.The pressure touch device of claim 1, wherein, The resilient member comprises two bent segments, the two bent segments are respectively connected to the opposite sides of the fixed segment; the Wheatstone bridge structure is provided with two groups, and the two groups of the Wheatstone bridge structure are respectively arranged close to the connection between the two resilient members and the fixed segment. 6.The pressure touch device according to any one of claims 1-5, wherein, The bent segment is provided with a groove close to the connection with the fixed segment, so that the part of the bent segment close to the fixed segment is narrower in width. 7.The pressure touch device according to any one of claims 1-5, wherein, The end of the bent segment in contact with the pressure input structure is curved or hemispherical, so that the bent segment is in linear contact or point contact with the pressure input structure. 8.The pressure touch device according to any one of claims 1-5, wherein, A conductive sheet is also attached to the bottom surface of the pressure input structure, the bent segment is electrically connected to the conductive sheet and is in contact with the pressure input structure through the conductive sheet; The deformation sensing layer is provided with a capacitance detection circuit, and the capacitance detection circuit is electrically connected to the bent segment.

9. A touch screen assembly comprising: It comprises the pressure touch device as claimed in any one of claims 1 to 8.

10. An electronic device comprising the pressure touch device as claimed in any one of claims 1 to 8, and / or the touch screen assembly as claimed in claim 9.

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