Electronic device

Abstract

Provided in the present application is an electronic device, comprising a housing and a virtual button structure arranged in the housing, wherein the housing is provided with an opening, and a pressing member of the virtual button structure is accommodated inside the housing and partially protrudes out of the housing through the opening. The virtual button structure further comprises a sensor, a spacer, a substrate and a piezoelectric plate, which are stacked inside the housing, wherein the sensor is connected to the pressing member; the substrate is arranged on the side of the sensor facing away from the pressing member and forms a vibration gap between itself and the sensor, the spacer being arranged in the vibration gap; and the piezoelectric plate is arranged on the side of the substrate facing away from the spacer and is configured, on the basis of the pressing state of the pressing member, to produce a corresponding vibration and transmit same to the pressing member. The present application can effectively improve button trigger feedback effects, realize local vibration of buttons, and improve user experience.

Description

Electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of keys, in particular to a key structure on an electronic device. BACKGROUND

[0002] With the rapid development of communication technology, electronic products are updated and replaced more and more quickly, and users significantly improve the use time and frequency of electronic products. In daily life, users not only have high requirements for the performance, power consumption and storage capacity of electronic products, but also have high requirements for the keys in electronic products.

[0003] The existing physical keys are mainly realized by keys and piezoelectric sheets, and the keys are mainly turned on by piezoelectric sheet pressing, and the hand feeling is realized by force feedback in the piezoelectric sheet deformation process, so that the feedback effect of the keys is relatively single, and special effects cannot be matched to specific scenes, which cannot provide more direct and muscle memory beneficial prompts and feedback to users, and there is a lack of tactile feedback and single vibration, which affects the user experience.

[0004] Therefore, it is necessary to provide a new key structure for an electronic device to solve the above technical problems. TECHNICAL PROBLEM

[0005] The purpose of the present application is to provide an electronic device capable of improving key trigger feedback effect, realizing local vibration of the key, and improving user experience. TECHNICAL SOLUTION

[0006] In order to solve the above technical problems, the present application provides an electronic device, which comprises a shell and a virtual key structure arranged in the shell, the shell is provided with an opening, and a pressing piece of the virtual key structure is accommodated in the shell and partially leaks out of the shell through the opening.

[0007] The virtual key structure further comprises a sensor, a gasket, a substrate and a piezoelectric sheet which are arranged in the shell in layers.

[0008] The sensor is connected with the pressing piece and is used for detecting the pressing state of the pressing piece.

[0009] The substrate is arranged between the sensor and the pressing piece on the side of the sensor away from the pressing piece to form a vibration gap, the gasket is arranged in the vibration gap, and the opposite sides of the gasket are connected with the sensor and the substrate respectively.

[0010] The piezoelectric sheet is arranged on the side of the substrate opposite to the gasket, and is used to vibrate according to the pressing state of the pressing member and transmit the vibration to the pressing member.

[0011] Preferably, the virtual key structure further comprises a support sheet arranged between the sensor and the gasket, and the pressing member and the sensor are supported by the support sheet.

[0012] Preferably, the support sheet is a metal support sheet, and the thickness of the support sheet is 0.1-1mm.

[0013] Preferably, the virtual key structure further comprises a first baffle and a second baffle, the first baffle and the second baffle are arranged in the vibration gap and fixed to the support sheet and / or the sensor, and the first baffle and the second baffle are arranged on opposite sides of the gasket.

[0014] Preferably, the support sheet is a rectangular structure, the first baffle and the second baffle are arranged on opposite sides of the gasket along the long axis direction of the support sheet, one end of the first baffle away from the gasket is flush with one end of the support sheet, and one end of the second baffle away from the gasket is flush with the other end of the support sheet.

[0015] Preferably, the first baffle and the second baffle are made of metal or high polymer, and the thickness of the first baffle and the second baffle is less than the thickness of the gasket.

[0016] Preferably, the thickness of the first baffle and the second baffle is 0.05-0.3mm, and the thickness of the gasket is 0.1-0.5mm.

[0017] Preferably, the opposite ends of the substrate are provided with through holes, the housing is provided with fixing holes corresponding to the positions of the through holes, and the electronic device further comprises a fixing member, the fixing member penetrates the through holes and the fixing holes in sequence to support the substrate inside the housing.

[0018] Preferably, the piezoelectric sheet comprises a plurality of piezoelectric ceramic sheets stacked in the pressing direction, and the number of layers of the piezoelectric ceramic sheets is 3-20.

[0019] Preferably, the pressing member comprises a connecting portion connected with the sensor and accommodated inside the housing, and a pressing portion partially exposed to the housing through the opening, the outer edge size of the pressing portion is less than the inner edge size of the opening, and the outer edge size of the connecting portion is greater than the inner edge size of the opening.

[0020] Preferably, projections of the pressing member, the sensor and the support sheet on the substrate in the pressing direction overlap each other.

[0021] Preferably, a projection of the substrate on the piezoelectric sheet in the pressing direction covers an outer edge of the piezoelectric sheet.

[0022] Preferably, the substrate is a metal substrate, and the thickness of the substrate is 0.05-0.5mm. Advantages

[0023] The application has the advantages that: the application sets the sensor in the shell and connects it with the pressing member to detect the pressing state of the pressing member, sets the substrate on the side of the sensor away from the pressing member, sets the gasket between the substrate and the sensor to provide a vibration space for the piezoelectric sheet, sets the piezoelectric sheet on the side of the substrate away from the gasket, and the piezoelectric sheet vibrates according to the pressing state detected by the sensor and transmits to the user, which effectively improves the feedback effect of the key triggering. Since the key can realize local vibration, it can be applied to different application scenarios, provides different haptic vibration for the user, and effectively improves the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained from these drawings without creative labor.

[0025] Fig. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the application.

[0026] Fig. 2 is a schematic diagram of a virtual key structure provided by an embodiment of the application.

[0027] Fig. 3 is an enlarged view of part A of the virtual key structure shown in Fig. 2.

[0028] Fig. 4 is an exploded structural diagram of the virtual key structure shown in Fig. 2.

[0029] Fig. 5 is a sectional view of the electronic device shown in Fig. 1 along the A-A direction.

[0030] Fig. 6 is an enlarged view of part B of the sectional view shown in Fig. 5.

[0031] Explanation of reference signs:

[0032] 1 - housing; 10 - opening; 11 - fixing hole; 2 - virtual key structure; 20 - pressing piece; 21 - connecting part; 22 - pressing part; 30 - sensor; 40 - supporting sheet; 50 - gasket; 51 - first baffle; 52 - second baffle; 60 - base sheet; 61 - through hole; 70 - piezoelectric sheet. Embodiments of the present application

[0033] The technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0034] Please refer to FIG. 1-6, the virtual key structure provided by the embodiments of the present application can improve the key trigger feedback effect, realize the local vibration of the key, and improve the user experience. Please refer to FIG. 1, it is a structural schematic diagram of the electronic device provided by the embodiments of the present application, the electronic device provided by the present application includes a housing 1 and a virtual key structure 2 arranged inside the housing 1.

[0035] Please refer to FIG. 5, it is a sectional view of the electronic device shown in FIG. 1 along the A-A direction, the housing 1 provided by the present application is provided with an opening 10, and the virtual key structure 2 is provided with a pressing piece 20, wherein the pressing piece 20 is accommodated inside the housing 1 and leaks out of the housing 1 through the opening 10, and by pressing the part of the pressing piece 20 exposed outside the housing 1, the pressing piece 20 can be moved relative to the housing 1 along the pressing direction.

[0036] Further, please refer to FIG. 2, it is a schematic diagram of the virtual key structure 2 provided by the embodiments of the present application, it can be observed that the virtual key structure 2 provided by the present application further includes a sensor 30, a gasket 50, a base sheet 60 and a piezoelectric sheet 70 arranged in the housing 1 in the thickness direction.

[0037] Specifically, the sensor 30 is connected with the pressing piece 20, for detecting the pressing state of the pressing piece, the base sheet 60 is arranged on the side of the sensor 30 away from the pressing piece 20, and a vibration gap is formed between the base sheet 60 and the sensor 30, the gasket 50 is arranged in the vibration gap, and at this time, the opposite sides of the gasket 50 are connected with the sensor 30 and the base sheet 60 respectively.

[0038] Further, the piezoelectric sheet 70 is arranged on the side of the base sheet 60 away from the gasket 50, and the piezoelectric sheet 70 is used for corresponding vibration according to the pressing state of the pressing piece 20 and transmitting to the pressing piece 20.

[0039] Preferably, the sensor 30 can be arranged in any one of a resistive pressure sensor, a piezoelectric sensor, a capacitive pressure sensor or an inductive pressure sensor, as long as any form of pressure sensor selected to detect the pressing state of the pressing member 20 is feasible, and the present application does not make further limitations thereon.

[0040] In the embodiment of the present application, the sensor 30 can detect whether the pressing member 20 is in the pressed state at the current time, and can collect the pressing time and the pressing force according to the actual requirement, so as to provide different feedbacks for different pressing time and pressing force, thereby improving the user's experience.

[0041] As an optional embodiment, the sensor 30 can be connected with the pressing member 20 by means of glue bonding or welding, and when the user presses the pressing member 20, the pressing member 20 further acts on the sensor 30, so that the sensor 30 detects the pressing state of the pressing member 20 at the current time.

[0042] Please refer to FIG. 3, which is an enlarged view of part A of the virtual key structure shown in FIG. 2. The present application has a substrate 60 on the side of the sensor 30 away from the pressing member 20, and the substrate 60 is arranged inside the housing 1 and forms a vibration gap with the sensor 30, thereby providing a vibration space for the piezoelectric sheet 70 arranged at the bottom of the substrate 60.

[0043] Further, the present application sets the gasket 50 in the vibration gap, and the opposite sides of the gasket 50 are connected with the sensor 30 and the substrate 60, respectively. The present application sets the piezoelectric sheet 70 on the side of the substrate 60 away from the gasket 50, and the piezoelectric sheet 70 is used to vibrate according to the pressing state of the pressing member 20 collected by the sensor 30. Since the piezoelectric sheet 70 contains a plurality of piezoelectric ceramic sheets arranged in the thickness direction, and the piezoelectric ceramic sheet is an electronic element capable of converting mechanical energy and electrical energy, when the voltage acts on the piezoelectric ceramic sheet, the piezoelectric ceramic sheet can generate high-frequency vibration by using the inverse piezoelectric effect. Since the present application has a vibration gap between the substrate 60 and the sensor 30, and sets the gasket 50 in the vibration gap, the vibration of the piezoelectric sheet 70 can be transmitted to the pressing member 20 through the gasket 50 and the piezoelectric sensor 30, thereby providing the user with tactile feedback.

[0044] Further, when the vibration gap is formed between the sensor 30 and the base sheet 60, the gasket 50 can be arranged in the vibration gap, and the opposite sides of the gasket 50 are connected with the sensor 30 and the base sheet 60 respectively, and the connection between the gasket 50 and the base sheet 60 can be achieved by means of glue or welding. The gasket 50 can be made of metal, and the thickness of the gasket 50 is preferably 0.1-0.5mm.

[0045] As an optional embodiment, the support sheet 40 is arranged between the sensor 30 and the gasket 50 to avoid the damage to the base sheet 60 and the piezoelectric sheet 70 caused by the excessive force of the user. The support sheet 40 can support the sensor 30 and the pressing member 20, and effectively buffer and support the pressing action of the pressing member 20.

[0046] The support sheet 40 can be connected with the sensor 30 by means of glue or welding, and the vibration gap is formed between the support sheet 40 and the base sheet 60. The opposite sides of the gasket 50 are connected with the support sheet 40 and the base sheet 60 respectively, so as to provide sufficient vibration space for the piezoelectric sheet 70. The thickness of the support sheet 40 is preferably 0.1-1mm, and the support sheet 40 is preferably made of metal.

[0047] Further, it can be observed that the sensor 30, the support sheet 40, the gasket 50 and the base sheet 60 are arranged in a rectangular structure and are stacked along the pressing direction of the pressing member 20. The gasket 50 is preferably arranged at the middle position between the support sheet 40 and the base sheet 60 to avoid the damage to the base sheet 60 or the piezoelectric sheet 70 caused by the excessive force of the user during the pressing process, and to avoid the plastic deformation of the base sheet 60 or the fragmentation of the piezoelectric sheet 70.

[0048] As an optional embodiment, the first stop sheet 51 and the second stop sheet 52 are arranged in the vibration gap to provide the pressing action of the pressing member 20 with limiting and buffering.

[0049] Specifically, the first stop sheet 51 and the second stop sheet 52 are also arranged in the vibration gap, and the first stop sheet 51 and the second stop sheet 52 can be fixed on the support sheet 40 or the sensor 30.

[0050] Specifically, when the sensor 30 is in direct contact with the gasket 50, the first baffle 51 and the second baffle 52 are fixed to the sensor 30, and when the support sheet 40 is arranged between the sensor 30 and the gasket 50, the first baffle 51 and the second baffle 52 are fixed to the support sheet 40. The above-mentioned fixing methods of the first baffle 51 and the second baffle 52 are feasible, and the present application does not make further limitations thereon.

[0051] Further, the first baffle 51 and the second baffle 52 are arranged to be spaced apart from the gasket 50 and arranged on opposite sides of the gasket 50, and it can be observed that the support sheet 40 provided by the present application is a rectangular structure, and the first baffle 51 and the second baffle 52 are arranged to extend along the long axis direction of the support sheet 40.

[0052] As an optional embodiment, the first baffle 51 and the second baffle 52 provided by the present application are arranged on opposite sides of the gasket 50 along the long axis direction of the support sheet 40, and it can be observed that one end of the first baffle 51 away from the gasket 50 is flush with one end of the support sheet 40, and one end of the second baffle 52 away from the gasket 50 is flush with the other end of the support sheet 40. As shown in FIG. 2, the first baffle 51 and the second baffle 52 are arranged on the left and right sides of the gasket 50, respectively, and the end of the first baffle 51 and the end of the second baffle 52 are flush with the two ends of the corresponding support sheet 40. Therefore, when the pressing member 20 is pressed downward, the left and right side ends of the support sheet 40 abut against the first baffle 51 and the second baffle 52, thereby avoiding excessive pressing force from damaging the substrate 60 and the piezoelectric sheet 70.

[0053] Since the left and right side ends of the support sheet 40 are flush with the first baffle 51 and the second baffle 52 at the corresponding positions, it can also be understood that the projection of the support sheet 40 on the substrate 60 along the pressing direction covers the first baffle 51, the gasket 50, and the second baffle 52.

[0054] Further, the first baffle 51 and the second baffle 52 can be arranged on the substrate 60 by means of glue bonding or welding. The thickness of the first baffle 51 and the second baffle 52 should be less than the thickness of the gasket 50. If the thickness of the first baffle 51 and the second baffle 52 exceeds the thickness of the gasket 50, the force generated during pressing will be concentrated on the gasket 50, which may cause the substrate 60 or the piezoelectric sheet 70 to crack. Therefore, the thickness of the first baffle 51 and the second baffle 52 should be less than the thickness of the gasket 50, so as to provide a limiting effect for the left and right side ends of the support sheet 40 during pressing.

[0055] Preferably, the thickness of the first and second blocking pieces 51 and 52 is between 0.05 and 0.3 mm, the thickness of the spacer 50 is between 0.1 and 0.5 mm, and the thickness of the first and second blocking pieces 51 and 52 is less than the thickness of the spacer 50.

[0056] As an optional embodiment, the first and second blocking pieces 51 and 52 are preferably made of metal or polymer.

[0057] In the embodiments, the first and second blocking pieces 51 and 52 can have a size similar to that of the spacer 50. In principle, the first and second blocking pieces 51 and 52 and the spacer 50 can have the same size and be symmetrically arranged on the substrate 60. The ends of the first and second blocking pieces 51 and 52 should be flush with the left and right ends of the support piece 40.

[0058] As an optional embodiment, the substrate 60 can be arranged inside the housing 1 by a fixing member (not shown). As shown in FIG. 2, the length of the substrate 60 is greater than that of the sensor 30. The substrate 60 has through holes 61 at opposite ends, and the housing 1 has fixing holes 11 corresponding to the through holes 61. At this time, the two through holes 61 are exposed outside the virtual key structure 2.

[0059] As shown in FIG. 4, which is an exploded view of the virtual key structure shown in FIG. 2, the electronic device provided by the application further includes the fixing member. The fixing member is arranged in the fixing hole 11, and sequentially penetrates the through hole 61 and the fixing hole 11, so as to arrange the substrate 60 inside the housing 1. Further, the piezoelectric piece 70 arranged below the substrate 60, the sensor 30 and the support piece 40 arranged above the substrate 60, and other structures are arranged inside the housing 1, forming a suspension structure capable of vibrating in the pressing direction.

[0060] It should be noted that although the substrate 60 is arranged inside the housing 1 by the fixing member, gaps are formed between the pressing member 20, the sensor 30, the support piece 40, the first and second blocking pieces 51 and 52, the piezoelectric piece 70, and the side wall of the housing 1. Therefore, the pressing action of the pressing member 20 inside the housing 1 and the vibration feedback of the piezoelectric piece 70 to the pressing action are not affected.

[0061] For example, the substrate 60 can be arranged inside the housing 1 by a bolt, or the two sides of the substrate 60 can be made into a buckle structure to be clamped inside the housing 1. As long as the substrate 60 can be arranged inside the housing 1, it is feasible.

[0062] As an optional implementation, the thickness of the substrate 60 is preferably between 0.05-0.5mm, and the substrate 60 is preferably in the form of a metal substrate, such as a stainless steel substrate 60 or a beryllium bronze substrate 60, and the above-mentioned metal materials are all feasible, and the application does not make further limitations.

[0063] Further, the piezoelectric sheet 70 provided by the application is a piezoelectric stack structure, which includes a plurality of piezoelectric ceramic sheets stacked in the first direction, i.e., stacked in the thickness direction. In a specific embodiment provided by the application, the pressing direction is the extension direction of the pressing member 20 to the piezoelectric sheet 70, and the number of layers of the piezoelectric ceramic sheet is preferably 3-20, so that different intensity feedbacks can be provided to the user's pressing action.

[0064] The piezoelectric sheet 70 is arranged on the side of the substrate 60 away from the gasket 50 by means of glue bonding or welding, and the size of the piezoelectric sheet 70 is smaller than that of the substrate 60.

[0065] The piezoelectric ceramic sheet is a ceramic material that can generate an electric charge distribution or a mechanical strain according to the pressure or electric field change applied to its surface. When a voltage is applied to the piezoelectric ceramic sheet, the piezoelectric ceramic sheet can generate high-frequency vibration by using the inverse piezoelectric effect. The sensor 30 detects the pressing state of the pressing member 20 at the current time, and a corresponding voltage is applied to the piezoelectric sheet 70 to generate a corresponding vibration, thereby providing feedback to the user's current pressing action. Since the piezoelectric sheet 70, the gasket 50, the support sheet 40, the sensor 30, and the pressing member 20 are relatively suspended inside the shell 1, the tactile effect generated by the vibration can be concentrated on the pressing part 22, so that the vibration effect is concentrated and fed back to the user's hand.

[0066] Of course, different sizes of voltage can be applied to the piezoelectric sheet 70 according to the current pressing time and the pressing degree detected by the sensor 30, so that the piezoelectric sheet 70 generates vibrations of different frequencies, thereby generating different vibration effects and further improving the user's experience. The above-mentioned implementations are all feasible.

[0067] Further, the pressing member 20 provided by the application can be understood as a key pressed by the user during pressing. The pressing member 20 includes a connecting part 21 accommodated inside the shell 1 and connected with the sensor 30, and a pressing part 22 partially exposed to the shell 1 through the opening 10. The pressing part 22 is the position directly contacted by the user during pressing, and the connecting part 21 is connected with the sensor 30 arranged inside the shell 1.

[0068] Further, since the shell 1 is provided with the opening 10, the outer edge size of the pressing part 22 is smaller than the inner edge size of the opening 10, so that the pressing part 22 can extend out of the shell 1 from the opening 10 and repeatedly press at the opening 10, and the outer edge size of the connecting part 21 is larger than the inner edge size of the opening 10, so as to avoid the pressing part 22 and the connecting part 21 from falling out of the shell 1, and affect the use experience.

[0069] Please refer to Fig. 6, which is an enlarged view of part B in the sectional view shown in Fig. 5, it can be observed that the pressing part 20, the sensor 30, the support sheet 40, the gasket 50, the base sheet 60 and the piezoelectric sheet 70 are sequentially stacked along the pressing direction, and the projections of the pressing part 20, the sensor 30 and the support sheet 40 on the base sheet 60 along the pressing direction overlap each other, that is, the size of the pressing part 20, the sensor 30 and the support sheet 40 is the same.

[0070] Further, since the size of the base sheet 60 is larger than the size of the sensor 30, the projection of the base sheet 60 on the piezoelectric sheet 70 along the pressing direction covers the outer edge of the piezoelectric sheet 70, and the size of the sensor 30 is also larger than the size of the piezoelectric sheet 70, so the projection of the sensor 30 on the piezoelectric sheet 70 along the pressing direction also completely covers the outer edge of the piezoelectric sheet 70, so as to concentrate the vibration of the piezoelectric sheet 70 to the pressing part 20, and improve the experience of the user.

[0071] It can be understood that the electronic device provided by the present application can be a smart electronic device such as a mobile phone, a watch and a tablet computer which needs to be fed back by a key, and the present application does not make too many limitations.

[0072] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An electronic device, comprising a housing and a virtual button structure disposed within the housing, the housing having an opening, the pressing element of the virtual button structure being housed inside the housing and partially protruding from the housing through the opening, characterized in that: The virtual button structure also includes sensors, pads, substrates, and piezoelectric sheets stacked inside the housing; The sensor is connected to the pressing element and is used to detect the pressing state of the pressing element; The substrate is disposed on the side of the sensor facing away from the pressing member, forming a vibration gap between the substrate and the sensor. The pad is disposed within the vibration gap, and the opposite sides of the pad are respectively connected to the sensor and the substrate. The piezoelectric sheet is disposed on the side of the substrate facing away from the pad. The piezoelectric sheet is used to vibrate accordingly according to the pressing state of the pressing member and transmit the vibration to the pressing member.

2. The electronic device as claimed in claim 1, characterized in that: The virtual button structure also includes a support piece disposed between the sensor and the pad, which supports the pressing element and the sensor.

3. The electronic device as described in claim 2, characterized in that: The support sheet is a metal support sheet with a thickness of 0.1-1mm.

4. The electronic device as claimed in claim 2, characterized in that: The virtual button structure further includes a first baffle and a second baffle. The first baffle and the second baffle are disposed within the vibration gap and fixed to the support plate and / or the sensor. The first baffle and the second baffle are spaced apart from the pad and disposed on opposite sides of the pad.

5. The electronic device as described in claim 4, characterized in that: The support plate has a rectangular structure. The first baffle and the second baffle are arranged on opposite sides of the pad along the long axis of the support plate. The end of the first baffle away from the pad is flush with one end of the support plate, and the end of the second baffle away from the pad is flush with the other end of the support plate.

6. The electronic device as described in claim 5, characterized in that: Both the first baffle and the second baffle are made of metal or polymer, and the thickness of both the first baffle and the second baffle is less than the thickness of the gasket.

7. The electronic device as claimed in claim 6, characterized in that: The thickness of the first baffle and the second baffle is 0.05-0.3 mm, and the thickness of the gasket is 0.1-0.5 mm.

8. The electronic device as claimed in claim 1, characterized in that: The substrate has through holes at opposite ends, and the housing has fixing holes at the corresponding positions of the through holes. The electronic device also includes a fixing member, which passes through the through holes and the fixing holes in sequence to mount the substrate inside the housing.

9. The electronic device as claimed in claim 1, characterized in that: The piezoelectric sheet comprises a plurality of piezoelectric ceramic sheets stacked along the pressing direction, wherein the number of piezoelectric ceramic sheets is 3-20 layers.

10. The electronic device as claimed in claim 1, characterized in that: The pressing component includes a connecting portion housed inside the housing and connected to the sensor, and a pressing portion partially exposed through the opening into the housing. The outer edge dimension of the pressing portion is smaller than the inner edge dimension of the opening, and the outer edge dimension of the connecting portion is larger than the inner edge dimension of the opening.

11. The electronic device as claimed in claim 2, characterized in that: The projections of the pressing element, the sensor, and the support plate onto the substrate along the pressing direction overlap each other.

12. The electronic device as claimed in claim 1, characterized in that: The projection of the substrate onto the piezoelectric sheet along the pressing direction covers the outer edge of the piezoelectric sheet.

13. The electronic device according to any one of claims 1-12, characterized in that: The substrate is a metal substrate with a thickness of 0.05-0.5 mm.

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