Touchpad pressure detection device, electronic device, detection method and storage medium

Abstract

The present invention relates to a pressure detection structure, and discloses a pressure detection device for a touchpad, an electronic device, a detection method and a storage medium. The pressure detection device for the touchpad in the present invention includes: a capacitor plate disposed on a circuit board, and a bracket electrically connected to the circuit board; the bracket includes: a first conductive member electrically connected to the circuit board, and a second conductive member disposed opposite to the capacitor plate, at least part of the projection area of the second conductive member in the direction towards the circuit board overlaps with the capacitor plate, and when the circuit board moves in the vertical direction, the distance between the capacitor plate and the second conductive member changes; the bracket further includes: a connecting member connecting the first conductive member and the second conductive member, when the first conductive member is forced to move, the connecting member moves with the first conductive member and drives the second conductive member to bend, and when the bent second conductive member returns to the second initial position, the first conductive member is driven by the connecting member to return to the first initial position.

Description

Technical Field

[0001] The present invention relates to a pressure detection structure, and particularly to a pressure detection device for a touchpad, an electronic device, a detection method, and a storage medium. Background Art

[0002] A touchpad (TouchPad / TrackPad) is an input device widely used in electronic devices. Users can simulate the movement and click operations of a mouse by sliding, clicking, or double-clicking their fingers on the touchpad, so it can be used as a substitute for a mouse. In order to enable the touchpad to better sense the operations of the user's fingers, such as different degrees of pressing force, or to filter out external invalid touches, a pressure sensor can be integrated into the touchpad. The pressing force is determined and invalid touches are filtered by the change in the pressure of the cover plate of the touchpad, thereby improving the performance of the touchpad.

[0003] However, the touchpad integrated with a pressure sensor currently has at least the following problems: Currently, when integrating a pressure sensor into a touchpad, a pressure sensor with an independent pressure detection function is connected to the original circuit of the touchpad. The pressure sensor integrated into the touchpad and the original touchpad still belong to two independent modules, and no optimization is made in terms of the number of parts and cost. Moreover, since the pressure sensor is integrated inside the touchpad, the pressure is transmitted through the original structure of the touchpad to the pressure sensor for detection, which affects the accuracy of pressure detection to a certain extent and the sensitivity of pressure detection. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a pressure detection device for a touchpad, an electronic device, a detection method, and a storage medium. By using the original bracket structure of the touchpad as a part of the pressure detection structure, a capacitive pressure detection structure is formed by the capacitor plates additionally provided on the circuit board and the bracket serving as the detection structure, so as to realize the detection of the pressure of the touchpad, reduce the number of parts of the pressure detection device of the touchpad, reduce the production cost, and improve the sensitivity of pressure detection to a certain extent.

[0005] To solve the above technical problems, an embodiment of the present invention provides a pressure detection device for a touchpad, including: a cover plate, a circuit board attached to the cover plate, a capacitor plate disposed on the circuit board, a bracket electrically connected to the circuit board, and a processor; the bracket includes: a first conductive member electrically connected to the circuit board, and a second conductive member disposed opposite to the capacitor plate, the first conductive member and the second conductive member are respectively in different planes, the second conductive member is spaced apart from the circuit board, and at least a part of the projection area of the second conductive member in the direction towards the circuit board overlaps with the capacitor plate, when the circuit board moves in the vertical direction, the distance between the capacitor plate and the second conductive member changes; wherein, the vertical direction is the direction perpendicular to the circuit board; the bracket further includes: a connecting member connecting the first conductive member and the second conductive member, when the first conductive member moves in the vertical direction from a first initial position along with the circuit board, the connecting member moves along with the first conductive member and drives the second conductive member to bend, when the bent second conductive member returns to a second initial position, the first conductive member is driven to return to the first initial position through the connecting member; the processor is configured to receive a capacitance signal generated by a capacitor formed by the capacitor plate and the second conductive member, and determine the magnitude of the pressure according to the capacitance signal.

[0006] An embodiment of the present invention further provides an electronic device, including: a housing and the above pressure detection device for the touchpad disposed on the housing.

[0007] An embodiment of the present invention further provides a pressure detection method for a touchpad, which is applied to the above pressure detection device for the touchpad, and the method includes: determining a capacitance signal generated by a capacitor formed by a capacitor plate and a second conductive member in the pressure detection device of the touchpad; determining the pressure received by the touchpad according to the capacitance signal and the pre-stored correspondence between the capacitance signal and the pressure.

[0008] An embodiment of the present invention further provides a computer-readable storage medium, storing a computer program, and when the computer program is executed by a processor, the above pressure detection method for the touchpad is implemented.

[0009] In the embodiments of the present invention, compared with the related art, improvements are made to the original bracket in the touchpad, so that the bracket is at least composed of a first conductive member electrically connected to the circuit board, a second conductive member spaced from the circuit board, and a connecting member connecting the first conductive member and the second conductive member. At least a part of the projection area of the second conductive member in the direction towards the circuit board overlaps with the capacitive electrode plates provided on the circuit board. The second conductive member in the bracket and the capacitive electrode plates form a capacitive pressure detection structure. When the circuit board moves in the vertical direction, the distance between the capacitive electrode plates and the second conductive member changes, changing the capacitive signal generated by the formed capacitor, thereby realizing the detection of the pressure received by the touchpad. Secondly, when the first conductive member moves in the vertical direction from the first initial position along with the circuit board, the connecting member moves along with the first conductive member and drives the second conductive member to bend. When the bent second conductive member returns to the second initial position, the first conductive member is driven by the connecting member to return to the first initial position. The linkage structure of the first conductive member, the connecting member and the second conductive member provides the effect that the touchpad automatically returns to the initial position after being touched. By improving the bracket structure, the original bracket structure of the touchpad not only retains the original elastic support function, but also cooperates with the capacitive electrode plates on the circuit board to realize the pressure detection function, reducing the number of parts required for pressure detection and lowering the manufacturing cost of the touchpad. Moreover, the present invention uses the bracket as a part of the capacitive pressure detection module, and the detected capacitance change is directly related to the distance change between the circuit board and the bracket, improving the sensitivity of pressure detection.

[0010] In addition, the number of capacitive electrode plates is N groups; N is a natural number greater than 1; the bracket includes: a first conductive member, and N connecting members extending from the edge of the first conductive member, and at least two of the connecting members extend in different directions from the edge of the first conductive member; each connecting member is correspondingly provided with a second conductive member, and the second conductive members are arranged in one-to-one correspondence with the capacitive electrode plates.

[0011] In addition, the pressure detection device of the touchpad further includes: a vibration motor; the first conductive member includes: a through hole corresponding to the position of the vibration motor, and the vibration motor passes through the through hole and is connected to the circuit board; the pressure detection device of the touchpad further includes: a silica gel pad; the silica gel pad is connected to the end of the second conductive member away from the connecting member, and the silica gel pad is attached to the side of the second conductive member facing away from the circuit board.

[0012] In addition, the number of capacitive electrode plates is N groups; N is a natural number greater than 1; the bracket includes: N first conductive members, and N connecting members extending from the edge of each first conductive member, and the N first conductive members do not contact each other; each connecting member is correspondingly provided with a second conductive member, and the second conductive members are arranged in one-to-one correspondence with the capacitive electrode plates.

[0013] In addition, the capacitor plate is a single plate, and the capacitor plate specifically serves as a transmitting plate or a receiving plate.

[0014] In addition, the capacitor plates are a transmitting plate and a receiving plate arranged side by side, and the projection area of the second conductive member in the direction of the circuit board overlaps with both the transmitting plate and the receiving plate.

[0015] In addition, the projection area of the capacitor plate in the direction of the second conductive member is located away from the connecting member. Description of the Drawings

[0016] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a scale limitation.

[0017] Figure 1 is an exploded view of a pressure detection device for a touchpad according to the present invention;

[0018] Figure 2 is a schematic structural diagram of a circuit board in a pressure detection device for a touchpad according to the present invention;

[0019] Figure 3 is an exploded view of another pressure detection device for a touchpad according to the present invention;

[0020] Figure 4 is a three-dimensional structural diagram of a pressure detection device for a touchpad according to the present invention;

[0021] Figure 5 is a schematic diagram of the state of a pressure detection device for a touchpad without force according to the present invention;

[0022] Figure 6 is a schematic diagram of the state of a pressure detection device for a touchpad under force according to the present invention;

[0023] Figure 7 is a schematic structural diagram of a circuit board in another pressure detection device for a touchpad according to the present invention;

[0024] Figure 8 is a three-dimensional structural diagram of another pressure detection device for a touchpad according to the present invention;

[0025] Figure 9 is a schematic diagram of the state of another pressure detection device for a touchpad without force according to the present invention;

[0026] Figure 10 It is a schematic diagram of the state of another pressure detection device of a touchpad under force according to the present invention;

[0027] Figure 11 It is a schematic diagram of the bracket structure of a pressure detection device of a touchpad according to the present invention.

[0028] Description of the reference numerals:

[0029] 1 - Cover plate;

[0030] 2 - Circuit board;

[0031] 3 - Capacitor plate; 31 - Transmitting plate; 32 - Receiving plate;

[0032] 4 - Bracket; 41 - First conductive member; 42 - Connecting member; 43 - Second conductive member;

[0033] 5 - Vibration motor;

[0034] 6 - Connector;

[0035] 7 - Silicone pad. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be elaborated in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present invention, many technical details are provided to help readers better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present invention can still be implemented.

[0037] The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation manners of the present invention. The embodiments can be combined and cross - referenced with each other under the premise of no contradiction.

[0038] The embodiments of the present invention relate to a pressure detection device of a touchpad, as Figure 1As shown in the figure, the pressure detection device of the touchpad includes: a cover plate 1, a circuit board 2 attached to the cover plate 1, a capacitor plate 3 disposed on the circuit board 2, a bracket 4 electrically connected to the circuit board 2, and a processor; the bracket 4 includes: a first conductive member 41 electrically connected to the circuit board 2, and a second conductive member 43 disposed opposite to the capacitor plate 3, the first conductive member 41 and the second conductive member 43 are respectively in different planes, the second conductive member 43 is spaced apart from the circuit board 2, and at least part of the projection area of the second conductive member 43 in the direction towards the circuit board 2 overlaps with the capacitor plate 3, when the circuit board 2 moves in the vertical direction, the distance between the capacitor plate 3 and the second conductive member 43 changes; wherein, the vertical direction is the direction perpendicular to the circuit board 2; the bracket 4 further includes: a connecting member 42 connecting the first conductive member 41 and the second conductive member 43, when the first conductive member 41 moves with the circuit board 2 from the first initial position in the vertical direction, the connecting member 42 moves with the first conductive member 41 and drives the second conductive member 43 to bend, when the bent second conductive member 43 returns to the second initial position, the first conductive member 41 is driven to return to the first initial position through the connecting member 42; the processor is configured to receive the capacitance signal generated by the capacitance formed by the capacitor plate 3 and the second conductive member 43, and determine the magnitude of the pressure according to the capacitance signal.

[0039] Compared with the related art, the embodiment of the present invention improves the original bracket in the touchpad, so that the bracket is at least composed of a first conductive member electrically connected to the circuit board, a second conductive member spaced apart from the circuit board, and a connecting member connecting the first conductive member and the second conductive member. At least part of the projection area of the second conductive member in the direction towards the circuit board overlaps with the capacitor plate disposed on the circuit board, and the second conductive member and the capacitor plate in the bracket form a capacitive pressure detection structure. When the circuit board moves in the vertical direction, the distance between the capacitor plate and the second conductive member changes, changing the capacitance signal generated by the formed capacitance, thereby realizing the detection of the pressure received by the touchpad. Secondly, when the first conductive member moves with the circuit board from the first initial position in the vertical direction, the connecting member moves with the first conductive member and drives the second conductive member to bend. When the bent second conductive member returns to the second initial position, the first conductive member is driven to return to the first initial position through the connecting member. The linkage structure of the first conductive member, the connecting member and the second conductive member provides the effect that the touchpad automatically returns to the initial position after being touched. Through the improvement of the bracket structure, the original bracket structure of the touchpad not only retains the original elastic support function, but also cooperates with the capacitor plate on the circuit board to realize the pressure detection function, reduces the number of parts required for pressure detection, and reduces the manufacturing cost of the touchpad. Moreover, the present invention uses the bracket as part of the capacitive pressure detection module, and the detected capacitance change situation has a direct relationship with the distance change between the circuit board and the bracket, improving the sensitivity of pressure detection.

[0040] As shown Figure 2 in the figure, a capacitor plate 3 is provided on the circuit board 2. Under the control of an external force, when the capacitor plate 3 moves vertically along with the circuit board, one end of the second conductive member 43 of the bracket away from the connecting member 42 can be approximately regarded as not changing its position because it is fixedly connected to the base. Therefore, during the process of the capacitor plate 3 moving closer to the second conductive member 43, the distance between the capacitor plate 3 and the second conductive member changes, resulting in a change in the capacitance signal, thus realizing the pressure detection function. The touchpad can recognize different pressing forces of the user and then trigger different instructions. In addition, a vibration motor 5 can be provided on the circuit board 2 to provide vibration feedback after detecting the user's pressing. A connector 6 can also be provided on the circuit board, and the connector connects the circuit board 2 to the host computer to realize the information interaction between the pressure detection device of the touchpad and the host computer. In addition, chips, electronic components, etc. related to the touchpad function are also provided on the circuit board 2, which will not be introduced one by one here.

[0041] In addition, the number of capacitor plates is N groups; N is a natural number greater than 1; the bracket includes: a first conductive member, and N connecting members extending from the edge of the first conductive member, and at least two connecting members extend in different directions from the edge of the first conductive member; a second conductive member is correspondingly provided for each connecting member, and the second conductive member is provided in one-to-one correspondence with the capacitor plate. The bracket adopts an integral structure, which is convenient for the disassembly and assembly of the bracket and simplifies the installation and disassembly steps of the device.

[0042] As shown Figure 3 in the figure, the number of capacitor plates 3 is set to four groups, Figure 3 as shown in the figure, each group of capacitor plates 3 includes a plate as a transmitting plate or a receiving plate. When the capacitor plate is used as a transmitting plate, the second conductive member 43 of the bracket is used as a receiving plate. When the capacitor plate is used as a receiving plate, the second conductive member 43 of the bracket is used as a transmitting plate. Considering that the bracket has a larger contact area with the outside world and is more vulnerable to the influence of the external environment, the capacitor plate can be used as a receiving plate, and the second conductive member 43 of the bracket can be used as a transmitting plate that is less likely to be affected by the external environment. The four groups of capacitor plates 3 are respectively arranged near the four corners of the circuit board 2. The first conductive member 41 of the bracket fits the middle area position of the circuit board 2 and extends along the edges of the four corners of the first conductive member 41 to the positions of the four corners of the circuit board 2, which can also be regarded as extending in the direction of the four groups of capacitor plates 3, and four second conductive members 43 are respectively obtained. A connecting member 42 is correspondingly provided for each of the first conductive member 41 and each second conductive member 43. The connecting member 42 is arranged in a direction perpendicular to the circuit board 2, so that the first conductive member 41 and the second conductive member 43 are respectively in two planes, and there is a certain interval between the second conductive member 43 and the circuit board 2, so that the distance between the second conductive member 43 and the capacitor plate 3 provided on the circuit board 2 can change.

[0043] As Figure 4 shown, when the first conductive member 41 of the bracket 4 is an integral structure, it is necessary to open through holes in the first conductive member 41 to ensure the electrical installation of other components on the circuit board 2. For example, a vibration motor 5 is also provided on the pressure detection device of the touchpad; the first conductive member 41 includes: a through hole corresponding to the position of the vibration motor 5, and the vibration motor passes through the through hole and is connected to the circuit board 2. In order to ensure the vibration feedback effect of the vibration motor 5, the pressure detection device of the touchpad may further include: a silica gel pad 7; the silica gel pad 7 is connected to one end of the second conductive member 43 away from the connecting member 42, and the silica gel pad 7 is attached to the side of the second conductive member 43 facing away from the circuit board 2. One side of the silica gel pad 7 is connected to the second conductive member 43, and the other side is fixedly connected to the base. It can be approximately considered that the position of the silica gel pad is fixed, but due to the material reason of the silica gel, the silica gel pad can deform to a certain extent. Therefore, when the vibration motor 5 vibrates, the silica gel pad 7 can provide the bracket 4 with the ability to displace slightly, and the circuit board 2 connected to the bracket 4 also has the ability to displace slightly, so that the user can perceive the vibration effect of the touchpad.

[0044] The capacitor plate in the embodiment of the present invention may be only a transmitting plate or a receiving plate, or the capacitor plates may be a transmitting plate and a receiving plate arranged side by side.

[0045] As Figure 4 shown, it is a schematic structural diagram when the capacitor plate 3 is only the receiving plate 32. In this case, the principle of pressure detection is as Figure 5 and Figure 6 shown, Figure 5 is a schematic diagram of the states of each structure in the pressure detection device of the touchpad without external force. The capacitor plate (receiving plate 32) is attached to the circuit board 2. The second conductive member 43 serves as a transmitting plate and forms a capacitive structure with the capacitor plate. The current between the second conductive member 43 and the first conductive member 41 is conducted, and the electric field lines point from the second conductive member 43 to the capacitor plate (receiving plate 32). When an external force F acts on the cover plate, as Figure 6 shown, the circuit board 2 moves towards Figure 6The external force F moves in the indicated direction. The position of the silica gel pad 7 is connected to the base, and the approximate position is fixed. The first conductive member 41 drives the connecting member 42 to move in the direction of the external force F, driving the second conductive member 43 to bend. In actual situations, the downward movement distance of the circuit board is limited, and the bending curvature of the second conductive member 43 is small. The change in the distance between the capacitor plate (receiving plate 32) and the second conductive member 43 can be approximately regarded as the movement distance of the circuit board 2. Therefore, when the capacitor plate (receiving plate 32) moves downward with the circuit board, the distance between the capacitor plate (receiving plate 32) and the second conductive member 43 decreases. According to the capacitance calculation formula: capacitance C = εS / (4πkd); where ε is the dielectric constant, which is related to the material properties of the medium between the plates; S is the facing area of the plates, and the larger the area, the larger the capacitance value; d is the distance between the two plates, and the capacitance value decreases when the distance increases; k is the electrostatic force constant (about 8.99×10^9 N·m² / C²). As the circuit board moves downward, the capacitance signal increases. According to the magnitude of the capacitance signal, the downward movement distance of the circuit board can be calculated, and then the magnitude of the external force F can be obtained.

[0046] In addition, the first conductive member 41 of the bracket can be connected to the GND channel. At this time, the distance between the capacitor plate (receiving plate 32) and the second conductive member 43 decreases, and the detected voltage signal of the capacitor plate (receiving plate 32) changes correspondingly. Similarly, the magnitude of the pressure can be determined according to the signal generated by the capacitor assembly formed by the detected capacitor plate (receiving plate 32) and the second conductive member 43.

[0047] As Figure 7 shown, each group of capacitor plates is composed of a transmitting plate 31 and a receiving plate 32 arranged side by side, and the positions of the transmitting plate 31 and the receiving plate 32 in each group of capacitor plates can be interchanged. There are overlapping areas between the projection area of the second conductive member in the direction towards the circuit board and both the transmitting plate 31 and the receiving plate 32. Taking the example of setting four groups of capacitor plates, as Figure 7 shown, the arrangement of the transmitting plate 31 and the receiving plate 32 included in each group of capacitor plates is the same, and the four groups of capacitor plates are respectively arranged near the four corners of the circuit board to facilitate accurate measurement of the pressure at different positions.

[0048] Figure 8 It is a three-dimensional structure schematic diagram of the pressure detection device for the touchpad. The vibration motor 5 is arranged at the through hole in the middle area of the bracket, and the connector 6 is arranged in the area outside the bracket. Therefore, there is no need to additionally set a hole for accommodating the connector 6 at the bracket.

[0049] When the capacitor plates include the transmitting plate 31 and the receiving plate 32, the principle of pressure detection is as Figures 9 to 10As shown, when no external force acts on the pressure detection device of the touchpad, the state of the internal structure of the pressure detection device of the touchpad is as Figure 9 shown. The capacitor plates (the emitting plate 31 and the receiving plate 32 arranged side by side) are attached to the circuit board 2. The second conductive member 43 serves as a floating conductive medium to assist in the electric field transmission between the emitting plate 31 and the receiving plate 32. The emitting plate 31, the receiving plate 32, and the second conductive member 43 together form a capacitor assembly. The electric field in the capacitor assembly is emitted from the emitting plate 31 and transmitted to the receiving plate 32 via the second conductive member 43. When an external force F acts on the cover plate, as Figure 10 shown, the circuit board 2 moves in the direction indicated by the Figure 10 external force F. The position of the silica gel pad 7 is connected to the base, and its approximate position remains fixed. The first conductive member 41 drives the connecting member 42 to move in the direction of the external force F, driving the second conductive member 43 to bend. In actual situations, the downward movement distance of the circuit board is limited, and the bending curvature of the second conductive member 43 is small. The distance changes between the emitting plate 31 and the receiving plate 32 and the second conductive member 43 can both be approximately regarded as the movement distance of the circuit board. Therefore, when the emitting plate 31 moves downward with the circuit board, the distances between the emitting plate 31 and the receiving plate 32 and the second conductive member 43 both decrease, and the capacitance signal generated by the capacitor assembly formed by the emitting plate 31, the receiving plate 32, and the second conductive member 43 becomes larger. According to the magnitude of the capacitance signal, the downward movement distance of the circuit board can be calculated, and then the magnitude of the external force F can be obtained.

[0050] In addition, in order to save circuit board space and not affect the layout of chips, electronic components, etc. on the circuit board, the bracket can also be disassembled from a complete structure into several sub-structures with small volumes. As Figure 11 shown, the number of capacitor plates is N groups; N is a natural number greater than 1; the bracket 4 includes: N first conductive members 41, and N connecting members 42 extending from the edge of each first conductive member 41. The N first conductive members 41 do not contact each other; each connecting member 42 is provided with a corresponding second conductive member 43, and the second conductive member 43 is arranged in one-to-one correspondence with the capacitor plates. Each sub-structure disassembled from the bracket includes a first conductive member 41, a connecting member 42, and a second conductive member 43. These sub-structures are evenly distributed on the circuit board, playing a role of evenly providing support force when the circuit board is subjected to an external force.

[0051] In addition, the capacitor plates in the above embodiments can be a part of the copper foil on the circuit board. The copper foil is connected to a specific pin of the chip as the capacitor emitting plate, or two separate copper foils are used as the emitting plate and the receiving plate of the capacitor respectively. The first conductive member of the bracket is fixed on the circuit board and is electrically connected to the corresponding pin of the chip. For example, the first conductive member is electrically connected to the corresponding pin by welding, or the first conductive member is electrically connected to the corresponding pin by a conductive adhesive.

[0052] In addition, the projection area of the capacitor plate in the direction of the second conductive member is located away from the connecting member. Such a design can reduce the influence of the bending of the second conductive member due to force on the pressure detection effect. Since the bending degree of the second conductive member near the connecting member is more severe than that away from the connecting member, when the capacitor plate is set at a position away from the connecting member, when the capacitor plate moves closer to the second conductive member, the distance between the capacitor plate and the second conductive member is closer to the distance that the circuit board moves downward, thereby improving the sensitivity of pressure detection.

[0053] In addition, the connection between the connecting member and the first conductive member is a rounded corner, and the connection between the connecting member and the second conductive member is a rounded corner, which can more stably transmit the force and avoid irreversible damage to the connecting member position of the bracket due to force.

[0054] Finally, to ensure the stability of the support of the bracket for the circuit board in the embodiments of the present invention, the thickness or material of the bracket can be adjusted to ensure that the bracket has a certain rigidity, can maintain the original state without deformation when not under external force, and the bracket has the ability of elastic deformation and can quickly return to the original state when the external force is removed. At the same time, since the bracket acts as an electrical connection structure in the embodiments of the present invention, the bracket can be made of a material with a certain conductivity, and the resistance value of the bracket can be adjusted to be small to minimize the influence of the resistance value of the bracket on the detection result of the capacitive pressure detection unit.

[0055] In the embodiments of the present invention, only the bracket that also serves as the pressure detection structure can be used as the support structure for the cover plate, without additionally providing other support structures. Since the size of the bracket in the embodiments of the present invention is large enough and has a sufficient contact area with the circuit board, only the bracket can provide a stable support effect.

[0056] Another embodiment of the present invention relates to an electronic device, which includes: a housing and the pressure detection device of the above touch pad provided on the housing.

[0057] Compared with the related art, the electronic device provided in this embodiment of the present invention is provided with the pressure detection device of the touchpad provided in the foregoing embodiment. Therefore, it also has the technical effects provided in the foregoing embodiment, which will not be elaborated herein.

[0058] Another embodiment of the present invention relates to a method for detecting the pressure of a touchpad, which is applied to the pressure detection device of the touchpad described above. The method includes: determining a capacitance signal generated by a capacitance formed by a capacitor plate and a second conductive member in the pressure detection device of the touchpad; and determining the pressure received by the touchpad according to the capacitance signal and a pre-stored corresponding relationship between the capacitance signal and the pressure.

[0059] The principle of the capacitance signal generated by the capacitance formed by the capacitor plate and the second conductive member, and the relationship between the capacitance signal and the pressure are specifically described in the foregoing embodiment, and will not be elaborated herein.

[0060] The step division of the above various methods is only for clear description. When implemented, they can be combined into one step or some steps can be split into multiple steps. As long as the same logical relationship is included, it is within the protection scope of the present invention; adding insignificant modifications to the algorithm or process or introducing insignificant designs, but not changing the core design of its algorithm and process are within the protection scope of the invention.

[0061] Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method embodiments described above are implemented.

[0062] That is, those skilled in the art can understand that all or part of the steps of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a program. The program is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes.

[0063] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A pressure detection device for a touchpad, characterized in that, Comprising: a cover plate, a circuit board attached to the cover plate, a capacitor plate disposed on the circuit board, a bracket electrically connected to the circuit board, and a processor; The bracket includes: a first conductive member electrically connected to the circuit board, and a second conductive member disposed opposite to the capacitor plate. The first conductive member and the second conductive member are respectively in different planes. The second conductive member is spaced apart from the circuit board, and at least a part of the projection area of the second conductive member in the direction towards the circuit board overlaps with the capacitor plate. When the circuit board moves in the vertical direction, the distance between the capacitor plate and the second conductive member changes; wherein, the vertical direction is the direction perpendicular to the circuit board; The bracket further includes: a connecting member connecting the first conductive member and the second conductive member. When the first conductive member moves in the vertical direction from a first initial position along with the circuit board, the connecting member moves along with the first conductive member and drives the second conductive member to bend. When the bent second conductive member returns to the second initial position, the first conductive member is driven to return to the first initial position through the connecting member; The processor is configured to receive a capacitance signal generated by a capacitor formed by the capacitor plate and the second conductive member, and determine the magnitude of the pressure according to the capacitance signal.

2. The pressure detection device of the touchpad according to claim 1, characterized in that The number of the capacitor plates is N groups; N is a natural number greater than 1; The bracket includes: one first conductive member, and N connecting members extending from the edge of the first conductive member. At least two of the connecting members extend in different directions from the edge of the first conductive member; One second conductive member is correspondingly arranged for each connecting member, and the second conductive members are arranged in one-to-one correspondence with the capacitor plates.

3. The pressure detection device of the touchpad according to claim 2, characterized in that, Further comprising: a vibration motor; The first conductive member includes: a through hole corresponding to the position of the vibration motor. The vibration motor passes through the through hole and is connected to the circuit board; The pressure detection device of the touch panel further includes: a silica gel pad; The silica gel pad is connected to one end of the second conductive member away from the connecting member, and the silica gel pad is attached to the side of the second conductive member facing away from the circuit board.

4. The pressure detection device of the touchpad according to claim 1, characterized in that The number of the capacitor plates is N groups; N is a natural number greater than 1; The bracket includes: N first conductive members, and N connecting members extending from the edge of each first conductive member. The N first conductive members do not contact each other; One second conductive member is correspondingly arranged for each connecting member, and the second conductive members are arranged in one-to-one correspondence with the capacitor plates.

5. The pressure detection device for a touchpad according to any one of claims 1 to 4, characterized in that, The capacitor plate is a single plate, and the capacitor plate specifically serves as a transmitting plate or a receiving plate.

6. The pressure detection device of a touchpad according to any one of claims 1 to 4, characterized in that, The capacitor plates are a transmitting plate and a receiving plate arranged side by side. The projection area of the second conductive member in the direction towards the circuit board has an overlapping area with both the transmitting plate and the receiving plate.

7. The pressure detection device of the touchpad according to any one of claims 1 to 4, characterized in that, The projection area of the capacitor plate in the direction towards the second conductive member is located away from the connecting member.

8. An electronic device, characterized in that, Comprising: a housing and the pressure detection device of the touch panel according to any one of claims 1 to 7 provided on the housing.

9. A pressure detection method for a touchpad, characterized in that, A pressure detection device applied to the touchpad according to any one of claims 1 to 7, the method comprising: Determining a capacitance signal generated by a capacitance formed by a capacitor plate and a second conductive member in the pressure detection device of the touchpad; Determining the pressure applied to the touchpad according to the capacitance signal and a pre-stored correspondence between the capacitance signal and the pressure.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the pressure detection method of the touchpad according to claim 9.

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