Pressure detection device of touch panel and electronic equipment

Abstract

The utility model relates to the field of touchpads, and discloses a pressure detection device of a touchpad and electronic equipment. According to the pressure detection device of the touch panel, a support comprises a support body, an elastic piece formed by extending of the support body, and a supporting piece arranged at the end of the elastic piece; the supporting piece is attached to the circuit board, and the supporting piece is used for supporting the circuit board and keeping a gap between the circuit board and the support body; the elastic piece is used for deforming under the action of external force, the supporting piece is arranged in a deformation area of the elastic piece, and when the elastic piece deforms, the supporting piece moves in the direction away from the circuit board relative to the support body; the magnetic generation unit is arranged in the induction range of the magnetic induction unit, and when the elastic piece deforms, the relative position of the magnetic induction unit and the magnetic generation unit changes. The magnetic generation unit can flexibly adjust the set position within the induction range of the magnetic induction unit, and convenient conditions are provided for flexible adjustment of the set position of the internal structure of the touch pad.

Description

Technical Field

[0001] This utility model relates to the field of touch panels, and in particular to a pressure detection device and electronic device for touch panels. Background Technology

[0002] A touchpad (or trackpad) is a widely used input device in electronic devices. Users can simulate mouse movement and clicking by sliding, clicking, or double-clicking their fingers on the touchpad, thus serving as a mouse replacement. To improve the touchpad's ability to sense user finger movements, such as varying degrees of pressure, or to filter out invalid touches, a pressure sensor can be integrated into the touchpad. This sensor determines the pressure applied by monitoring changes in the pressure on the touchpad's cover plate and filters out invalid touches, thereby enhancing the touchpad's performance.

[0003] The inventors discovered that current touchpads integrating pressure sensors have at least the following problems: Currently, pressure sensors integrated into touchpads typically use resistive sensors, which determine pressure by detecting the deformation of a cantilever beam. This type of sensor limits its placement to the cantilever beam that is deformed under external force. Adjusting the sensor's position prevents pressure detection, thus restricting the placement of pressure sensors in touchpads and preventing flexible adjustments. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a pressure detection device and electronic device for a touch panel. Pressure detection is achieved through the cooperation of a magnetic generation unit and a magnetic induction unit. The magnetic generation unit can flexibly adjust its position within the sensing range of the magnetic induction unit, providing convenient conditions for the flexible adjustment of the position of the internal structure of the touch panel.

[0005] To address the aforementioned technical problems, embodiments of this utility model provide a pressure detection device for a touchpad, comprising: a cover plate, a circuit board attached to the cover plate, a magnetic induction unit disposed on the circuit board, a magnetic generation unit disposed on a support, and a processor; the support includes: a support body, an elastic member extending from the support body, and a support member disposed at the end of the elastic member; the support member is attached to the circuit board, supporting the circuit board and maintaining a gap between the circuit board and the support body; the elastic member is deformed under external force, the support member is disposed in the deformation area of ​​the elastic member, and when the elastic member deforms, the support member moves away from the circuit board relative to the support body; the magnetic generation unit is disposed within the sensing range of the magnetic induction unit, and when the elastic member deforms, the relative position of the magnetic induction unit and the magnetic generation unit changes; the processor is used to determine the magnitude of the external force based on the detection result of the magnetic induction unit.

[0006] An embodiment of this utility model also provides an electronic device, including: a housing and a pressure detection device for the aforementioned touch panel disposed on the housing.

[0007] Compared to existing technologies, this embodiment of the invention detects the magnetic field signal generated by a magnetic generation unit mounted on a support using a magnetic induction unit mounted on a circuit board. The support of the touchpad's pressure detection device comprises a support body, an elastic member extending from the support body, and a support member at the end of the elastic member. The support member is attached to the circuit board to support it and maintain a gap between the circuit board and the support body. When the elastic member deforms under external force, the support member, located in the deformation area of ​​the elastic member, moves away from the circuit board relative to the support body during deformation. This reduces the gap between the circuit board and the support body, causing a change in the relative position of the magnetic induction unit on the circuit board and the magnetic generation unit on the support. Consequently, the magnetic field signal detected by the magnetic induction unit changes accordingly. The processor determines the magnitude of the external force based on the magnetic field signal detected by the magnetic induction unit, thus achieving pressure detection. Since the magnetic induction unit only needs to be within the magnetic field range of the magnetic generation unit to detect the aforementioned pressure, and since the magnetic generation unit does not need to be connected to a circuit to generate a magnetic field, the magnetic generation unit can be flexibly set within the sensing range of the magnetic induction unit without being fixed in a specific position, thus providing convenient conditions for flexible adjustment of the position of the internal structure of the touchpad.

[0008] In addition, the elastic element is integrally formed with the main body of the bracket.

[0009] In addition, the elastic element includes a fixed area and a deformable area. The fixed area is connected to the support body, and the deformable area is spaced apart from the support body.

[0010] Furthermore, when not subjected to external force, the elastic element and the main body of the support are on the same plane.

[0011] In addition, the magnetic induction unit and the magnetic generation unit are positioned in a non-directly opposite position.

[0012] In addition, the pressure detection device of the touch panel also includes: a vibration motor; the vibration motor is disposed on the circuit board; the bracket also includes: a receiving space formed at the position corresponding to the vibration motor, the receiving space being used to receive the vibration motor.

[0013] In addition, the support component is made of silicone.

[0014] In addition, the magnetic generating unit is disposed on the support body, or the magnetic generating unit is disposed on the elastic member.

[0015] In addition, the magnetic generation unit is a magnet, and the magnetic induction unit is a Hall sensor, a tunnel magnetoresistive sensor (TMR), a giant magnetoresistive sensor (GMR), or an anisotropic magnetoresistive sensor (AMR). Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is an exploded structural diagram of the pressure detection device for the touchpad according to an embodiment of this solution;

[0018] Figure 2 This is a schematic diagram of the circuit board structure in the pressure detection device of the touch panel according to this embodiment;

[0019] Figure 3 This is a schematic diagram of the support structure in the pressure detection device of the touchpad according to this embodiment;

[0020] Figure 4 This is an exploded structural diagram of the pressure detection device for the touchpad according to an embodiment of this solution;

[0021] Figure 5 This is a schematic diagram of the assembled circuit board and bracket in the pressure detection device of the touch panel according to this embodiment;

[0022] Figure 6This is an exploded structural diagram of the pressure detection device for the touchpad according to another embodiment of this solution;

[0023] Figure 7 This is a cross-sectional structural diagram of the pressure detection device of the touch panel according to an embodiment of this solution;

[0024] Figure 8 This is a schematic diagram of the state of the touchpad pressure detection device under no-force conditions according to the embodiment of this solution;

[0025] Figure 9 This is a schematic diagram of the state of the pressure detection device of the touch panel under a force condition according to an embodiment of this solution. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this utility model to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0027] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with or referenced by each other without contradiction.

[0028] Embodiments of this utility model relate to a pressure detection device for a touchpad, such as... Figure 1 As shown, the pressure detection device of the touchpad includes: a cover plate 1, a circuit board 2 attached to the cover plate 1, a magnetic induction unit 4 disposed on the circuit board 2, a magnetic generation unit 5 disposed on the bracket 3, and a processor; the bracket 3 includes: a bracket body 31, an elastic member 32 extending from the bracket body 31, and a support member 33 disposed at the end of the elastic member 32; the support member 33 is attached to the circuit board 2, and the support member 33 is used to support the circuit board 2 and maintain a gap between the circuit board 2 and the bracket body 31; the elastic member 32 is used to deform under the action of external force, and the support member 33 is disposed in the deformation area of ​​the elastic member 32. When the elastic member 32 deforms, the support member 33 moves away from the circuit board 2 relative to the bracket body 31; the magnetic generation unit 5 is disposed within the sensing field range of the magnetic induction unit 4. When the elastic member 32 deforms, the relative position of the magnetic induction unit 4 and the magnetic generation unit 5 changes; the processor is used to determine the magnitude of the external force based on the detection result of the magnetic induction unit 4.

[0029] Compared to existing technologies, this embodiment of the invention detects the magnetic field signal generated by a magnetic generation unit mounted on a support using a magnetic induction unit mounted on a circuit board. The support of the touchpad's pressure detection device comprises a support body, an elastic member extending from the support body, and a support member at the end of the elastic member. The support member is attached to the circuit board to support it and maintain a gap between the circuit board and the support body. When the elastic member deforms under external force, the support member, located in the deformation area of ​​the elastic member, moves away from the circuit board relative to the support body during deformation. This reduces the gap between the circuit board and the support body, causing a change in the relative position of the magnetic induction unit on the circuit board and the magnetic generation unit on the support. Consequently, the magnetic field signal detected by the magnetic induction unit changes accordingly. The processor determines the magnitude of the external force based on the magnetic field signal detected by the magnetic induction unit, thus achieving pressure detection. Since the magnetic induction unit only needs to be within the magnetic field range of the magnetic generation unit to detect the aforementioned pressure, and since the magnetic generation unit does not need to be connected to a circuit to generate a magnetic field, the magnetic generation unit can be flexibly set within the sensing range of the magnetic induction unit without being fixed in a specific position, thus providing convenient conditions for flexible adjustment of the position of the internal structure of the touchpad.

[0030] like Figure 2 As shown, a magnetic induction unit 4 is disposed on the circuit board 2, and the magnetic induction unit 4 is electrically connected to the circuit board 2. One side of the support member 33 is attached to the surface of the circuit board 2. Figure 3 As shown, the side of the support member 33 that is attached to the circuit board 2 is attached to the elastic member 32 of the bracket 3 and is pasted on the surface of the elastic member 32 so that the force from the circuit board 2 to the bracket 3 can be applied to the elastic member 32 by the support member 33.

[0031] like Figure 2 As shown, a vibration motor is also installed on circuit board 2. The vibration motor primarily provides tactile feedback, triggering vibration when the touchpad is subjected to external force to enrich the user's interactive experience. Since the vibration motor has a certain size, a corresponding space is formed in the bracket to accommodate it. This space helps to avoid obstructing the vibration motor, reducing the gap between the circuit board and the bracket, thereby improving the sensitivity of the magnetic induction unit 4 to magnetic fields and facilitating a reduction in the size of the touchpad's pressure detection device. Additionally, a connector 7 is installed on circuit board 2, connecting it to the host computer to enable information exchange between the touchpad's pressure detection device and the host computer. Furthermore, circuit board 2 also contains touchpad-related chips and electronic components, which will not be described in detail here.

[0032] like Figure 4 The diagram shows an exploded view of the pressure detection device for the touchpad. Four support members 33 are positioned at the four corners of the circuit board 2 to provide stable support. Similarly, a corresponding elastic element 32 is provided at the corresponding position of each support member 33. A set of magnetic induction units 4 and magnetic generation units 5 are also located at each support member 33. The magnitude of the external force is determined by comprehensively analyzing the detection results obtained from multiple sets of magnetic induction units 4 and magnetic generation units 5, making the detection results more accurate. Multiple sets of magnetic induction units 4 and magnetic generation units 5 typically form a symmetrical structure, and the number of magnetic induction units 4 can be four or six, etc. Figure 5 As shown, the vibration motor 6 and connector 7 are usually located in the middle area of ​​the circuit board, and the bracket has a suitable clearance space at the locations where the vibration motor 6 and connector 7 are located.

[0033] In addition, such as Figure 6 As shown, the magnetic generation unit is mounted on the support body, or as... Figure 4 As shown, the magnetic generation unit is mounted on the elastic element. Figure 7 As shown, the magnetic generating unit is set in the position directly opposite to the magnetic induction unit, or the magnetic induction unit and the magnetic generating unit can be flexibly set to non-directly opposite positions according to the available space on the bracket, as long as the magnetic generating unit is set within the sensing range of the magnetic induction unit.

[0034] Taking the example of the magnetic generation unit being positioned directly opposite the magnetic induction unit, the principle of pressure detection will be explained in detail below: Figures 8 to 9 As shown, when the touchpad's pressure detection device is not subjected to external force, the internal structure of the touchpad's pressure detection device is as follows: Figure 8 As shown, the magnetic induction unit 4 is attached to the circuit board 2, and the magnetic generation unit 5 is attached to the bracket. Under the support of the support member 33, there is a certain gap between the magnetic induction unit 4 and the magnetic generation unit 5. The magnetic induction unit 4 is used to detect the magnetic field generated by the magnetic generation unit 5. Specifically, the magnetic generation unit 5 is mounted on an elastic member, which includes a fixed area and a deformation area. The fixed area B is connected to the bracket body, and the deformation area A is spaced apart from the bracket body, thus allowing the deformation area A to undergo displacement relative to the bracket body. When the cover plate 1 is subjected to an external force F, such as... Figure 9 As shown, circuit board 2 is directed towards Figure 9The external force F indicates movement in the indicated direction, causing the support member 33 to apply force to the deformation area A of the elastic member. The deformation area A of the elastic member deforms in the direction of the external force F, but the position of the fixed area A of the elastic member remains unchanged. Therefore, the circuit board 2 moves towards the support body, shortening the distance between the magnetic induction unit 4 and the magnetic generation unit 5. The closer the magnetic induction unit 4 is to the magnetic source, the stronger the signal sensed. Based on the change in the distance between the magnetic induction unit 4 and the magnetic generation unit 5, the signal generated by the magnetic induction unit 4 changes accordingly, and the magnitude of the external force F can be calculated. In practical applications, the deformation of the elastic member is small (the bending curvature is small), and it can be approximated as a plane. Even if the magnetic generation unit is placed in the deformation area of ​​the elastic member, the impact on the detection results can be ignored. To further improve the detection accuracy, the magnetic generation unit can be placed in the support body part that will not deform. In addition, setting the magnetic induction unit and the magnetic generation unit opposite each other can improve the signal detection sensitivity and simplify the signal calculation of the magnetic induction unit. In practical applications, it is preferred to set the magnetic induction unit and the magnetic generation unit opposite each other. Given the complexity of the touchpad's internal structure, when the magnetic sensing unit and magnetic generation unit are not directly opposite each other, the signal calculation method needs to be adjusted accordingly to obtain accurate pressure. Distributing the magnetic sensing units across the circuit board allows for more comprehensive detection results, thereby improving the accuracy of pressure detection at various pressure points.

[0035] Furthermore, regarding the structural design of the support, the elastic element can be integrally molded with the support body to simplify the manufacturing process. The integrally molded support structure also facilitates installation and disassembly. When not subjected to external force, the elastic element and the support body are on the same plane. The elastic element is formed by a semi-enclosed through-channel carved out of the integral support structure. The elasticity of the elastic element can be controlled based on its length.

[0036] Additionally, the support structure is made of silicone. The magnetic generation unit is a magnet, and the magnetic induction unit is a Hall sensor, tunnel magnetoresistive (TMR) sensor, giant magnetoresistive (GMR) sensor, or anisotropic magnetoresistive (AMR) sensor. The magnetic induction unit is positioned as far away as possible from other electronic components on the circuit board to avoid electromagnetic interference that could affect the pressure detection results.

[0037] Another feasible embodiment of this utility model relates to an electronic device, including: a housing and a pressure detection device for the aforementioned touch panel disposed on the housing.

[0038] Specifically, an electronic device can be an electronic device that includes a 3D touch module. A 3D touch module refers to a multi-functional module that includes touch detection, pressure detection, and vibration detection.

[0039] Compared with related technologies, the electronic device provided in this embodiment of the present invention is equipped with the pressure detection device of the touch panel provided in the aforementioned embodiment. Therefore, it also has the technical effects provided in the aforementioned embodiment, and will not be described in detail here.

[0040] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A pressure detecting device of a touch panel, characterized by comprising: The pressure detection device of the touch panel comprises a cover plate, a circuit board attached to the cover plate, a magnetic induction unit arranged on the circuit board, a magnetic generation unit arranged on a bracket, and a processor. The bracket comprises a bracket body, an elastic member extended from the bracket body, and a support member arranged at the end of the elastic member. The support member is attached to the circuit board, and the support member is used to support the circuit board and maintain a gap between the circuit board and the bracket body. The elastic member is used to deform under external force, and the support member is arranged in the deformation area of the elastic member. When the elastic member deforms, the support member moves away from the circuit board relative to the bracket body. The magnetic generation unit is arranged in the induction range of the magnetic induction unit. When the elastic member deforms, the relative position of the magnetic induction unit and the magnetic generation unit changes. The processor is used to determine the size of the external force according to the detection result of the magnetic induction unit. The elastic member and the bracket body are integrally formed.

2. The pressure detecting apparatus of a touch panel according to claim 1, wherein 3. The pressure detection device of the touch panel according to claim 2, wherein The elastic member comprises a fixed area and a deformation area, the fixed area is connected with the bracket body, and the deformation area is arranged separately from the bracket body. When not subjected to external force, the elastic member and the bracket body are in the same plane.

4. The pressure detecting apparatus of a touch panel according to claim 2, wherein The magnetic induction unit and the magnetic generation unit are arranged in a non-orthogonal position.

5. The pressure detecting apparatus of a touch panel according to claim 1, wherein Further comprising:

6. The pressure detecting apparatus of a touch panel according to claim 1, wherein A vibration motor; The vibration motor is arranged on the circuit board; The bracket further comprises a containing space formed at the corresponding position of the vibration motor, and the containing space is used to contain the vibration motor. The support member is made of silica gel.

7. The pressure detecting apparatus of a touch panel according to claim 6, wherein The magnetic generation unit is arranged on the bracket body, or the magnetic generation unit is arranged on the elastic member.

8. The pressure detecting apparatus of a touch panel according to any one of claims 1 to 7, wherein The magnetic generation unit is a magnet, and the magnetic induction unit is a Hall sensor, a tunnel magnetoresistance sensor TMR, a giant magnetoresistance sensor GMR, or an anisotropic magnetoresistance sensor AMR.

9. The pressure detecting apparatus of a touch panel according to any one of claims 1 to 7, wherein The pressure detection device of the touch panel comprises a housing and a pressure detection device of the touch panel as claimed in any one of claims 1 to 9 arranged on the housing.

10. An electronic device, comprising: ​

Images