Touch recognition device

Abstract

The utility model relates to a touch recognition device. The utility model relates to a piezoelectric transducer which comprises a shell, at least two piezoelectric ceramic pieces, a signal processor and a rigid connecting piece, and the piezoelectric ceramic pieces are arranged on the inner wall of one side of the shell. And the signal processor is arranged in the shell. The rigid connecting piece is arranged in the shell and fixedly connected with the shell, and the piezoelectric ceramic pieces are electrically connected with the signal processor through the rigid connecting piece. The piezoelectric ceramic piece, the rigid connecting piece and the signal processor are arranged in the shell, so that interference of a part of magnetic field or electric field can be shielded, and the detection accuracy is ensured. The direction of the pressure relative to the piezoelectric ceramic pieces can be judged according to the sequence of the pressure detected by the different piezoelectric ceramic pieces. The rigid connecting piece is fixedly connected into the shell, the shell is not prone to shaking when stable, and ghost signals are avoided. And the signal processor amplifies or converts the received signal for transmission, so that subsequent use of the signal is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a touch recognition device. BACKGROUND

[0002] With the development of sensor technology, pressure sensor technology has emerged, and the touch recognition device is a relatively common application of pressure sensor technology. The core element of the touch recognition device is a piezoelectric ceramic. The piezoelectric ceramic in the touch recognition device recognizes the size of the touch pressure by receiving a touch signal or a pressing signal, and then a processor makes corresponding operations according to the size of the touch pressure, such as touch switch, vibration feedback, etc.

[0003] In the related art, the touch recognition device usually does not have a position information recognition function, and the user cannot determine the direction or position information of the pressure point relative to the piezoelectric ceramic sheet, which reduces the user experience to some extent. In addition, the touch recognition device usually uses a signal line to connect inside to transmit the signal generated by the piezoelectric ceramic sheet. This connection through the signal line usually has a suspended part during installation. Since the signal output by the piezoelectric ceramic is usually a relatively weak signal, under the influence of external factors such as vibration, magnetic field and electric field, the signal line is easily disturbed by small disturbances, resulting in ghost signals, so that the result of the piezoelectric ceramic sheet recognizing the pressure (pressure size, number of times of receiving pressure) is not accurate. In some use scenarios where the number of times of pressure received by the piezoelectric ceramic sheet needs to be determined, the ghost signal will make the number of times of pressure recognized not match the actual number of times of pressure applied, resulting in a failure of the function. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a touch recognition device to solve the problems of no positioning effect and easy to be disturbed of the above touch recognition device.

[0005] The present application provides a touch recognition device, which comprises:

[0006] a shell;

[0007] a piezoelectric ceramic sheet, at least two of which are arranged on the inner wall of one side of the shell;

[0008] a signal processor arranged in the shell;

[0009] a rigid connecting piece arranged in the shell and fixedly connected with the shell, and the piezoelectric ceramic sheet is electrically connected with the signal processor through the rigid connecting piece.

[0010] In some embodiments, the touch recognition device further comprises an adhesive member arranged between the piezoelectric ceramic sheet and the inner wall of the housing, and the piezoelectric ceramic sheet is adhered to the inner wall of the housing through the adhesive member.

[0011] In some embodiments, the inner wall of the housing is provided with a groove, and the adhesive member is arranged at the bottom wall of the groove.

[0012] In some embodiments, the touch recognition device further comprises a conductive plate arranged on the piezoelectric ceramic sheet, and all the piezoelectric ceramic sheets are electrically connected to the rigid connecting member through the conductive plate.

[0013] In some embodiments, the housing is filled with a damping material, and the damping material forms a damping layer on one side of the inner wall of the housing; the piezoelectric ceramic sheet and part of the rigid connecting member are arranged in the damping layer, and the damping material is in close contact with the piezoelectric ceramic sheet and part of the rigid connecting member.

[0014] In some embodiments, the touch recognition device further comprises a connector, one end of which is connected to the signal processor, and the other end extends to the outside of the housing to lead out the signal processed by the signal processor.

[0015] In some embodiments, the touch recognition device further comprises a cover, and the side wall of the housing away from the piezoelectric ceramic sheet is provided with an opening, and the cover is arranged at the opening.

[0016] In some embodiments, the piezoelectric ceramic sheet is provided with two piezoelectric ceramic sheets arranged side by side on one side of the inner wall of the housing.

[0017] In some embodiments, the piezoelectric ceramic sheet is provided with three piezoelectric ceramic sheets, two of which are arranged side by side on one side of the inner wall of the housing; and the other piezoelectric ceramic sheet is arranged on one side of the two piezoelectric ceramic sheets and has the same distance to the two piezoelectric ceramic sheets.

[0018] In some embodiments, the piezoelectric ceramic sheet is provided with four piezoelectric ceramic sheets arranged in a rectangular shape on one side of the inner wall of the housing.

[0019] The aforementioned touch recognition device, by housing piezoelectric ceramic sheets, a rigid connector, and a signal processor inside the housing, can shield against some magnetic or electric field interference, ensuring the accuracy of pressure recognition. Multiple piezoelectric ceramic sheets are laid on the inner wall of the housing. When pressure is applied to the housing wall containing the piezoelectric ceramic sheets, the multiple piezoelectric ceramic sheets generate current according to the magnitude of the applied pressure. The order in which different piezoelectric ceramic sheets detect pressure allows the determination of the direction of the pressure application point relative to the sensor. The rigid connector is fixedly connected inside the housing, preventing shaking when the housing is stable, thus improving the stability of signal transmission and avoiding ghost signals. The current generated by the piezoelectric ceramic sheets is conducted through the rigid connector to the signal processor for processing, amplifying or converting the received signal for subsequent use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a touch recognition device according to this application.

[0021] Figure 2 This is a front view of a touch recognition device from one side of the cover, according to this application.

[0022] Figure 3 This application provides a touch recognition device along the edge Figure 2 A cross-sectional view along line AA in the middle.

[0023] Figure 4 This application relates to a touch recognition device. Figure 3 A magnified view of a section at point B.

[0024] Figure 5 This is a schematic diagram showing the arrangement of a piezoelectric ceramic sheet in one embodiment of a touch recognition device according to this application.

[0025] Figure 6 This is a schematic diagram showing the arrangement of a piezoelectric ceramic sheet in another embodiment of a touch recognition device according to this application.

[0026] Figure 7 This is a schematic diagram showing the arrangement of a piezoelectric ceramic sheet in another embodiment of a touch recognition device according to this application.

[0027] In the diagram, 100 is the housing; 110 is the groove; 200 is the piezoelectric ceramic sheet; 300 is the signal processor; 400 is the rigid connector; 500 is the adhesive component; 600 is the conductive plate; 700 is the damping material; 800 is the connector; and 900 is the cover. Detailed Implementation

[0028] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0029] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0031] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, if there is a description such as "on" or "under" or the like for a first feature relative to a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature "below", "under" and "under" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0033] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0034] Referring to Figure 1 , Figure 1 A perspective structural schematic diagram of a touch recognition device in an embodiment of the present application is shown. The touch recognition device provided by the embodiment of the present application includes a shell 100, piezoelectric ceramic sheets 200, a signal processor 300 and a rigid connecting piece 400. The piezoelectric ceramic sheets 200 are at least two, and the piezoelectric ceramic sheets 200 are all laid on the inner wall of one side of the shell 100. The signal processor 300 is arranged in the shell. The rigid connecting piece 400 is arranged in the shell 100 and fixedly connected with the shell 100, and the piezoelectric ceramic sheets 200 are all electrically connected with the signal processor 300 through the rigid connecting piece 400.

[0035] Referring to Figure 1 , Figure 2 and Figure 3 It should be noted that the piezoelectric ceramic sheets 200 are laid on the inner wall of one side of the shell 100, and when pressure is applied to the side wall of the shell 100 where the piezoelectric ceramic sheets 200 are located, the piezoelectric ceramic sheets 200 will be subjected to pressure, thereby generating an electric current according to the pressure. The inside of the shell 100 has a placing cavity, and the piezoelectric ceramic sheets 200, the signal processor 300 and the rigid connecting piece 400 are all arranged in the placing cavity. The shell 100 forms a closed structure, which can shield external electric field and magnetic field, avoid interference of external magnetic field or electric field on the piezoelectric ceramic sheets 200, the signal processor 300 and the rigid connecting piece 400 to generate ghost signals, and improve the accuracy of pressure recognition of the piezoelectric ceramic sheets 200.

[0036] The electric signal generated by the piezoelectric ceramic sheet 200 is transmitted to the signal processor 300 through the rigid connecting piece 400 for processing (such as amplification or conversion) to facilitate subsequent processing of the signal. The rigid connecting piece 400 is fixedly connected with the shell 100, and the rigid connecting piece 400 can remain stable without the shell 100 shaking to avoid the generation of ghost signals due to the slight influence of signal transmission caused by the shaking of the rigid connecting piece 400. Since the plurality of piezoelectric ceramic sheets 200 are arranged on the same inner wall of the shell 100, when pressure acts on the shell 100, the time at which each piezoelectric ceramic sheet 200 recognizes the pressure and the size of the pressure recognized by each piezoelectric ceramic sheet 200 are different, so that the direction of the pressure application (i.e., the direction of the pressure point relative to the piezoelectric ceramic sheet 200) can be determined according to the time at which each piezoelectric ceramic sheet 200 recognizes the pressure.

[0037] When the touch recognition device is touched, the side of the shell 100 provided with the piezoelectric ceramic sheet 200 faces the direction of the pressure application, and the pressure is applied to the surface of the shell 100. The piezoelectric ceramic sheet 200 inside the shell 100 detects the pressure and generates a corresponding electric signal according to the size of the detected pressure. The electric signal is transmitted to the signal processor 300 through the rigid connecting piece 400, and the signal processor 300 processes the electric signal to convert it into other signals for subsequent use. By reading the time difference between the detection of the pressure by the plurality of piezoelectric ceramic sheets 200, the direction of the pressure point relative to the piezoelectric ceramic sheet 200 can be determined.

[0038] Through the above arrangement, the plurality of piezoelectric ceramic sheets 200 recognize the pressure to determine the direction of the pressure point relative to the piezoelectric ceramic sheet 200 according to the order of detection by each piezoelectric ceramic sheet 200. By arranging the rigid connecting piece 400 and fixing it inside the shell 100, it is ensured that the signal is not easily disturbed by shaking during transmission. The piezoelectric ceramic sheet 200, the signal processor 300 and the rigid connecting piece 400 are all arranged inside the shell 100, which can shield the interference of electric field or magnetic field and improve the accuracy of pressure recognition. In addition, the signal processor 300 is arranged inside the shell 100, and the electric signal generated by the piezoelectric ceramic sheet 200 only needs to be transmitted for a short distance to be processed by the signal processor 300, which reduces the interference during transmission and further improves the accuracy of pressure recognition.

[0039] For the touch recognition device of the above scheme, further, the touch recognition device can recognize the direction of the point of action of the pressure relative to the piezoelectric ceramic sheet 200, the number of times of pressure received by the piezoelectric ceramic sheet 200, so that the touch recognition device is not only limited to detecting the size of the pressure received, but also can send different control signals according to the direction of the pressure and the number of times of pressure received by the touch recognition device itself or in cooperation with an external signal emitting device, so as to control different devices, thereby effectively increasing the application scenarios of the present application.

[0040] In addition, the shell 100 is made of a material with a low elastic modulus. By using a material with a low elastic modulus to make the shell 100, the error caused by the material deformation of the shell 100 can be avoided, and the accurate recognition of the piezoelectric ceramic sheet 200 to the pressure is ensured. The signal processor 300 can amplify the electric signal, so that the electric signal is not easily disturbed in the subsequent transmission process, or convert the analog signal into a digital signal which is not easily disturbed. In addition, the detection result can also be directly obtained by the signal processor 300 for reading, for real-time detection of the pressure.

[0041] In some embodiments, the touch recognition device further comprises an adhesive member 500 arranged between the piezoelectric ceramic sheet 200 and the inner wall of the shell 100, and the piezoelectric ceramic sheet 200 is adhered to the inner wall of the shell 100 through the adhesive member 500.

[0042] Referring to Figure 3 and Figure 4 It should be noted that the adhesive member 500 comprises a bonding layer formed by a bonding material (such as glue, adhesive, etc.), the adhesive member 500 is arranged between the piezoelectric ceramic sheet 200 and the inner wall of the shell 100, the thickness of the adhesive member 500 is uniform, and the area of the adhesive member 500 is greater than the sum of the areas of the plurality of piezoelectric ceramic sheets 200, so that the plurality of piezoelectric ceramic sheets 200 can be more firmly laid on the inner wall of the shell 100 through the adhesive member 500. By arranging the adhesive member 500 between the piezoelectric ceramic sheet 200 and the shell 100, the influence of non-contact signals (vibration, etc.) on the piezoelectric ceramic sheet 200 is reduced.

[0043] In some embodiments, the inner wall of the shell 100 is provided with a groove 110, and the adhesive member 500 is laid on the bottom wall of the groove 110.

[0044] Referring to Figure 3 and Figure 4It should be noted that when the adhesive 500 is arranged, the adhesive material in a liquid state is injected into the groove 110, so that the shape of the adhesive 500 after forming matches the shape of the groove 110. The adhesive 500 is the adhesive material after forming, and the adhesive 500 is arranged in the groove 110. The inner side wall of the groove 110 is in contact with the side surface of the adhesive 500, which can provide a limit for the adhesive 500 to avoid the offset of the adhesive 500 perpendicular to the pressure direction.

[0045] In some embodiments, the touch recognition device further comprises a conductive plate 600, which is arranged on the piezoelectric ceramic sheet 200, and all the piezoelectric ceramic sheets 200 are electrically connected to the rigid connector 400 through the conductive plate 600.

[0046] Referring to Figure 3 and Figure 4 It should be noted that the surface of the piezoelectric ceramic sheet 200 in contact with the inner side wall of the shell 100 is the lower surface, the surface opposite to the lower surface of the piezoelectric ceramic sheet 200 is the upper surface, and the conductive plate 600 is arranged on the upper surface of the piezoelectric ceramic sheet 200. When the piezoelectric ceramic sheet 200 is subjected to pressure, the electrical signals generated by all the piezoelectric ceramic sheets 200 are transmitted to the rigid connector 400 through the conductive plate 600, and then the electrical signals are transmitted to the signal processor 300 by the rigid connector 400. The conductive plate 600 has good conductivity, which can reduce the signal distortion caused by the loss of electrical signals during transmission.

[0047] In some embodiments, the shell 100 is filled with a damping material 700, and the damping material 700 is arranged on one side of the inner wall of the shell 100 to form a damping layer; the piezoelectric ceramic sheet 200 and part of the rigid connector 400 are arranged in the damping layer, and the damping material 700 is attached to the piezoelectric ceramic sheet 200 and part of the rigid connector 400.

[0048] Referring to Figure 3 It should be noted that the damping material 700 is selected from rubber damping material, polyurethane damping material, or liquid silicone damping material, etc.

[0049] In some embodiments, after the piezoelectric ceramic sheet 200 and the rigid connector 400 are installed in the shell 100, the damping material 700 in a molten state is filled into the shell 100, and the piezoelectric ceramic sheet 200 and the part of the rigid connector 400 connected to the piezoelectric ceramic sheet 200 are embedded in the damping material 700. The damping material 700 in a molten state can ensure that the damping material 700 is in full contact with the inner side wall of the shell 100, the piezoelectric ceramic sheet 200, and the rigid connector 400. After the damping material 700 filled into the shell 100 is cooled, a solid layer is formed, and the cooled damping material 700 is tightly attached to the inner side wall of the shell 100, the piezoelectric ceramic sheet 200, and the rigid connector 400.

[0050] By setting the damping material 700 closely attached to the piezoelectric ceramic sheet 200 and the rigid connecting piece 400, the stability of the piezoelectric ceramic sheet 200 and the rigid connecting piece 400 can be improved, the interference signal generated by the piezoelectric ceramic sheet 200 and the rigid connecting piece 400 due to shaking can be effectively reduced, and at the same time, the electromagnetic interference to the piezoelectric ceramic sheet 200 can be isolated, and the accuracy of pressure identification can be improved.

[0051] It should be noted that the signal processor 300 is arranged outside the damping material 700, so as to facilitate disassembly and maintenance.

[0052] In some embodiments, the touch recognition device further comprises a connector 800, one end of the connector 800 is connected with the signal processor 300, and the other end extends to the outside of the shell 100 to lead out the signal processed by the signal processor 300.

[0053] It should be noted that the connector 800 is fixed on the side wall of the shell 100 and penetrates the side wall of the shell 100 to extend from the inside of the shell 100 to the outside of the shell 100. The connector 800 is used for connection with external equipment, such as the signal processor 300 for amplifying or converting electrical signals, the connector 800 as a conductive device leads out the processed electrical signals and connects with electrical signal reading devices and other equipment to lead out the electrical signals for subsequent processing and reading parameters; such as the signal processor 300 directly reads the electrical signals, the connector 800 connects the external equipment that needs to be controlled to transmit the control signal to control the corresponding external equipment.

[0054] In some embodiments, the touch recognition device further comprises a cover 900, and the side wall of the shell 100 away from the piezoelectric ceramic sheet 200 is provided with an opening, and the cover 900 is arranged at the opening.

[0055] It should be noted that the cover 900 is detachably arranged at the opening. When the touch recognition device is installed, the cover 900 is removed, and the piezoelectric ceramic sheet 200, the rigid connecting piece 400 and the signal processor 300 are installed in the inside of the shell 100 through the opening. After the structure in the inside of the shell 100 is installed, the cover 900 is arranged at the opening, and the cover 900 and the shell 100 form a sealed structure to improve the shielding effect of the shell 100.

[0056] In some embodiments, the piezoelectric ceramic sheet 200 is provided with two piezoelectric ceramic sheets 200, and the two piezoelectric ceramic sheets 200 are arranged side by side on the inner wall of one side of the shell 100.

[0057] Reference Figure 3 and Figure 5It should be noted that the two piezoelectric ceramic sheets 200 are arranged side by side on the inner wall of the shell 100. When a pressure is applied to the surface of the shell 100, if the position of the pressure is on the left or right side of the two piezoelectric ceramic sheets 200, a time difference will occur when the two piezoelectric ceramic sheets 200 are detected. The time sequence of the pressure detected by the two piezoelectric ceramic sheets 200 can determine the direction of the pressure point relative to the two piezoelectric ceramic sheets 200.

[0058] For example, the pressure is applied to the left side of the two piezoelectric ceramic sheets 200. The piezoelectric ceramic sheet 200 on the left side will detect the pressure first and generate an electric signal. After a certain period of time, the piezoelectric ceramic sheet 200 on the right side detects the pressure and generates an electric signal. The time difference of the detected parameters can determine that the position of the pressure is on the left side of the two piezoelectric ceramic sheets 200. Similarly, when the pressure is applied to the right side of the two piezoelectric ceramic sheets 200, the time difference of the pressure detected by the two piezoelectric ceramic sheets 200 can determine that the position of the pressure is on the right side of the two piezoelectric ceramic sheets 200. In this embodiment, by arranging two piezoelectric ceramic sheets 200, the direction of the pressure point relative to the piezoelectric ceramic sheet 200 can be determined from the left and right directions.

[0059] In addition, when there is an interference signal in the detection process (such as vibration, electromagnetic interference, etc.), both piezoelectric ceramic sheets 200 will be disturbed, that is, the same interference signal will be contained in the parameters of the two piezoelectric ceramic sheets 200. By differentiating the signals detected by the two piezoelectric ceramic sheets 200, the size of the interference signal can be determined, and the interference signal can be eliminated through data processing to improve the accuracy of the detection result.

[0060] In some embodiments, the piezoelectric ceramic sheet 200 is provided with three piezoelectric ceramic sheets 200, two of which are arranged side by side on the inner wall of one side of the shell 100; the other piezoelectric ceramic sheet 200 is arranged on one side of the two piezoelectric ceramic sheets 200, and the distance to the two piezoelectric ceramic sheets 200 is the same.

[0061] Referring to Figure 3 and Figure 6It is to be noted that two piezoelectric ceramic pieces 200 are arranged side by side on the left and right of the piezoelectric ceramic piece 200, and the other piezoelectric ceramic piece 200 is arranged on the front side of the two piezoelectric ceramic pieces 200 arranged side by side, and the center of the piezoelectric ceramic piece 200 and the distance from the edge of the two piezoelectric ceramic pieces 200 to the two piezoelectric ceramic pieces 200 are the same. When pressure is applied to the shell 100, the time difference of the pressure detected by the three piezoelectric ceramic pieces 200 can determine the position of the pressure application. For example, when the pressure is applied to the shell 100 at the position on the rear side of the three piezoelectric ceramic pieces 200, the two piezoelectric ceramic pieces 200 arranged side by side will first detect the pressure, and the other piezoelectric ceramic piece 200 will detect the pressure after a certain time difference, thereby determining the position of the pressure point. Similarly, when the pressure application position is on the front side, the left side and the right side of the three piezoelectric ceramic pieces 200, the order of the pressure detected by the three piezoelectric ceramic pieces 200 can determine the direction of the pressure point relative to the piezoelectric ceramic piece 200. By arranging three piezoelectric ceramic pieces 200, the direction of the pressure point relative to the piezoelectric ceramic piece 200 can be determined from the front, rear, left and right directions.

[0062] In addition, similarly, the three piezoelectric ceramic pieces 200 will all detect the same interference signal, and by differentiating the signals detected by the three piezoelectric ceramic pieces 200, the interference signal can be eliminated and the detection accuracy can be improved.

[0063] In some embodiments, four piezoelectric ceramic pieces 200 are arranged, and the four piezoelectric ceramic pieces 200 are arranged in a rectangular manner on the inner wall of one side of the shell 100.

[0064] Referring to Figure 3 and Figure 7 It is to be noted that when pressure is applied to the shell 100, the time of the pressure detected by the four piezoelectric ceramic pieces 200 will be different according to the position of the pressure point, thereby determining the direction of the pressure point relative to the piezoelectric ceramic piece 200. For example, the pressure is applied to the right front of the piezoelectric ceramic piece 200, the piezoelectric ceramic piece 200 located on the right front will first detect the pressure, then the piezoelectric ceramic pieces 200 located on the left front and the right rear will detect the pressure, and the piezoelectric ceramic piece 200 located on the left rear will detect the pressure last. The above detection order can determine that the pressure point is located on the right front of the piezoelectric ceramic piece 200. By arranging four piezoelectric ceramic pieces 200, the direction of the pressure point relative to the piezoelectric ceramic piece 200 can be determined from the front, rear, left, right, left front, right front, left rear and right rear directions, so as to further improve the accuracy of the pressure direction determination.

[0065] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0066] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A touch recognition device, characterized by, The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

2. The touch recognition device according to claim 1, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

3. The touch recognition device according to claim 2, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

4. The touch recognition device according to claim 1, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

5. The touch recognition device according to claim 1, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

6. The touch recognition device according to claim 1, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

7. The touch recognition device according to claim 1, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

8. The touch recognition device according to any one of claims 1 to 7, characterized in that, The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

9. The touch recognition device according to any one of claims 1 to 7, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

10. The touch recognition device according to any one of claims 1 to 7, wherein The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet. The utility model relates to a piezoelectric ceramic sheet, signal processor and rigid connecting piece, and belongs to the field of piezoelectric ceramic sheet.

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