Narrow-frame intelligent interactive tablet and virtual key device thereof

Abstract

The utility model relates to the field of intelligent interactive tablets, and discloses a narrow-frame intelligent interactive tablet and a virtual key device thereof. The virtual key device of the narrow-frame intelligent interactive tablet comprises a shell, a piezoelectric ceramic actuator and a driving circuit, the shell comprises a shell surface, a partially thinned area exists on the inner side or the outer side of the shell surface, the piezoelectric ceramic actuator is fixedly arranged on the inner side of the thinned area, and the driving circuit is electrically connected with the piezoelectric ceramic actuator; when the piezoelectric ceramic actuator detects that the thinned area deforms, a detection signal is reported to the driving circuit to trigger a pressing event, and the driving circuit provides a driving electric signal to the piezoelectric ceramic actuator after receiving the detection signal, so that the piezoelectric ceramic actuator generates telescopic vibration and drives the thinned area to generate bending vibration. Therefore, trepanning is avoided, and the key switch function is realized while the attractive appearance is ensured. And a tactile feedback effect can be provided, and the user experience is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent interactive tablets, and in particular to a narrow-frame intelligent interactive tablet and a virtual key device thereof. Background Art

[0002] In some electronic devices, buttons including power buttons and volume adjustment buttons are essential interactive tools. Since these buttons are usually deployed on the housing or frame of the electronic device, the deployment of physical buttons inevitably involves operations such as opening holes in the housing or frame, resulting in discontinuity and unsightly appearance of the electronic device, as well as reduced waterproof and dustproof effects.

[0003] With the advancement of piezoelectric ceramic actuators and driving circuit technology, more and more driving force can be provided to electronic devices to produce tactile feedback effects, which also provides the possibility of producing integrated buttons on the frame of electronic devices. For example, Chinese patent CN112882533A provides a solution that uses slits on the frame to reduce the surface strength of the frame, the purpose of which is to achieve an integrated button effect on the side of the electronic device. However, the frame structure involved in this solution still needs to have a narrow slit structure, which destroys the integrity of the frame.

[0004] For another example, the prior art also provides a seamless virtual key solution, which sets a support structure under the shell. When the shell of the electronic device is pressed, the piezoelectric ceramic actuator stretches and vibrates in the vertical direction under the hard support of the support structure, and the shell part above the shell is lifted to vibrate in the vertical direction, thereby generating a tactile feeling of simulating a physical key. However, this solution requires setting a support structure under the shell, which increases the cost on the one hand and requires a certain installation space on the other hand, which is unfavorable for the overall planning and design of electronic devices that need to be designed to be thinner and narrower. Utility Model Content

[0005] The embodiments of the utility model aim to provide a virtual button device for a narrow-frame smart interactive tablet and a narrow-frame smart interactive tablet, which can solve the problem that the physical buttons of existing electronic devices cause the discontinuity and unsightliness of the appearance of the electronic devices and the reduction of the waterproof and dustproof effects, or the virtual buttons cannot meet the requirements of the overall planning and design of electronic devices to be thinner and narrower.

[0006] In order to solve the above technical problems, the first embodiment of the utility model provides a virtual key device of a narrow-framed smart interactive tablet, the virtual key device of the narrow-framed smart interactive tablet comprising: a housing, a piezoelectric ceramic actuator and a driving circuit; wherein:

[0007] The shell comprises a complete shell surface, and a partially thinned area exists inside or outside the shell surface;

[0008] The piezoelectric ceramic actuator is fixedly arranged inside the thinned area of ​​the shell surface;

[0009] The driving circuit is electrically connected to the piezoelectric ceramic actuator;

[0010] When the piezoelectric ceramic actuator detects that the thinned area on the surface of the shell is deformed, it reports a detection signal to the drive circuit to trigger a pressing event. After receiving the detection signal, the drive circuit provides a driving electrical signal to the piezoelectric ceramic actuator, causing the piezoelectric ceramic actuator to generate telescopic vibration, thereby driving the thinned area of ​​the shell to generate bending vibration.

[0011] Optionally, the outer side of the shell surface is divided into a button area for users to press.

[0012] Optionally, the piezoelectric ceramic actuator is fixedly arranged inside the thinned area of ​​the shell surface opposite to the key area, and the piezoelectric ceramic actuator is used to report a detection signal to the drive circuit when detecting that the key area on the shell surface is deformed.

[0013] Optionally, the virtual key device of the narrow-frame smart interactive tablet further includes a fixing component; the piezoelectric ceramic actuator is fixedly arranged inside the thinned area of ​​the shell surface through the fixing component.

[0014] Optionally, the piezoelectric ceramic actuator is a sheet-shaped piezoelectric ceramic actuator.

[0015] Optionally, if the piezoelectric ceramic actuator cannot detect deformation of the thinned area on the surface of the shell, the virtual button device of the narrow-framed smart interactive tablet also includes a pressure sensor, which is fixedly arranged on the inside of the thinned area on the surface of the shell and electrically connected to the drive circuit, and is used to detect deformation of the thinned area on the surface of the shell and report a detection signal to the drive circuit.

[0016] Optionally, the pressure sensor includes a strain gauge or a piezoelectric ceramic sensor.

[0017] Optionally, the driving circuit includes a controller and a power amplifier; wherein:

[0018] The controller is electrically connected to the power amplifier, and the controller is electrically connected to the piezoelectric ceramic actuator and / or the pressure sensor, and is used to collect the detection signal reported by the piezoelectric ceramic actuator or the pressure sensor to trigger a pressing event, and provide a driving electrical signal to the power amplifier;

[0019] The power amplifier is electrically connected to the piezoelectric ceramic actuator, and is used to amplify the driving electrical signal provided by the controller to the voltage amplitude at which the piezoelectric ceramic actuator operates, and then output it to the piezoelectric ceramic actuator, so that the piezoelectric ceramic actuator generates telescopic vibration, thereby driving the thinned area of ​​the shell to generate bending vibration.

[0020] Optionally, the controller is also communicatively connected to the host, and is configured to provide the press event to the host after the press event is triggered.

[0021] Correspondingly, the second aspect of the present invention provides a narrow-border smart interactive tablet, which includes the virtual button device of the narrow-border smart interactive tablet described in the first aspect of the present invention.

[0022] Compared with the prior art, the utility model provides a virtual key device of a narrow-framed smart interactive tablet and a narrow-framed smart interactive tablet. The virtual key device of the narrow-framed smart interactive tablet includes a shell, a piezoelectric ceramic actuator and a drive circuit. The shell includes a complete shell surface, and there is a partial thinning area on the inner side or the outer side of the shell surface. The piezoelectric ceramic actuator is fixedly arranged inside the thinning area of ​​the shell surface, and the drive circuit is electrically connected to the piezoelectric ceramic actuator; when the piezoelectric ceramic actuator detects that the thinning area of ​​the shell surface is deformed, the piezoelectric ceramic actuator reports a detection signal to the drive circuit to trigger a pressing event, and after receiving the detection signal, the drive circuit provides a driving electrical signal to the piezoelectric ceramic actuator, so that the piezoelectric ceramic actuator generates a telescopic vibration, which drives the thinning area of ​​the shell to generate a bending vibration. Thus, the piezoelectric ceramic actuator detects the deformation of the thinning area on the surface of the shell to realize the detection of the pressing event, and the piezoelectric ceramic actuator generates a stretching vibration according to the driving electrical signal provided by the driving circuit, which drives the thinning area of ​​the shell to generate a bending vibration, providing tactile feedback for the user, avoiding the need to open a hole in the shell, and the virtual key position has no gap, ensuring the appearance of the electronic device product while also realizing the function of the key switch, so as to distinguish the key switch of the prior art from the need to open a hole in the shell appearance for installation, the key gap in the appearance, and the need to press the key shell to have a certain displacement stroke to press the key switch in the way of using physical physical keys in the prior art. And by changing the shape of the driving electrical signal in the driving circuit, different tactile feedback effects can be provided to the user, enhancing the user experience, so as to distinguish the virtual keys of the prior art from only bringing fixed tactile feedback effects to the user's fingers. In addition, the virtual key device of the narrow-framed smart interactive tablet does not need to set a supporting structure under the shell, which can save components and reduce costs on the one hand; on the other hand, it can save space, facilitate the planning and design of the whole machine product, and meet the planning and design requirements of thinner and narrower whole machines for electronic equipment. This can solve the problem that the physical buttons of existing electronic devices cause the electronic devices to have discontinuous and unsightly appearance and reduced waterproof and dustproof effects, or the problem that the virtual buttons cannot meet the requirements of thinner and narrower overall planning and design of electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 This is a first structural schematic diagram of a virtual key device of a narrow-frame smart interactive tablet provided by the utility model;

[0025] Figure 2This is a second structural schematic diagram of a virtual key device of a narrow-frame smart interactive tablet provided by the utility model;

[0026] Figure 3 It is a schematic diagram of a piezoelectric ceramic actuator driving a thinned area to bend in a virtual key device of a narrow-frame smart interactive tablet provided by the utility model;

[0027] Figure 4 It is a schematic diagram of the electrical connection between the driving circuit and the piezoelectric ceramic actuator in a virtual key device of a narrow-frame smart interactive tablet provided by the utility model;

[0028] Figure 5 It is a schematic diagram of the electrical connection between the driving circuit, the piezoelectric ceramic actuator and the pressure sensor in a virtual key device of a narrow-frame smart interactive tablet provided by the utility model;

[0029] Figure 6 It is a structural schematic diagram of a narrow-frame intelligent interactive tablet provided by the utility model.

[0030] Description of main component symbols:

[0031] Virtual 1 shell 11 of narrow-frame smart interactive tablet

[0032] Button device

[0033] Shell surface inner side 111 Shell surface outer side 112

[0034] Thinning area 113 Key area 114

[0035] Piezoelectric ceramic actuator 12 driving circuit 13

[0036] Pressure sensor 14 Controller 131

[0037] Power amplifier 132 Narrow frame smart interactive tablet 100 DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom" and the like used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0040] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] In some electronic devices, buttons including power buttons and volume adjustment buttons are essential interactive tools. Since these buttons are usually deployed on the housing or frame of the electronic device, the deployment of physical buttons inevitably involves operations such as opening holes in the housing or frame, resulting in discontinuity and unsightly appearance of the electronic device, as well as reduced waterproof and dustproof effects.

[0042] With the advancement of piezoelectric ceramic actuators and driving circuit technology, more and more driving force can be provided to electronic devices to produce tactile feedback effects, which also provides the possibility of producing integrated buttons on the frame of electronic devices. For example, Chinese patent CN112882533A provides a solution that uses slits on the frame to reduce the surface strength of the frame, the purpose of which is to achieve an integrated button effect on the side of the electronic device. However, the frame structure involved in this solution still needs to have a narrow slit structure, which destroys the integrity of the frame.

[0043] For another example, the prior art also provides a seamless virtual key solution, which sets a support structure under the shell. When the shell of the electronic device is pressed, the piezoelectric ceramic actuator stretches and vibrates in the vertical direction under the hard support of the support structure, and the shell part above the shell is lifted to vibrate in the vertical direction, thereby generating a tactile feeling of simulating a physical key. However, this solution requires setting a support structure under the shell, which increases the cost on the one hand and requires a certain installation space on the other hand, which is unfavorable for the overall planning and design of electronic devices that need to be designed to be thinner and narrower.

[0044] Therefore, the inventor discovered the above technical problems during the research and development process, and proposed a virtual key device for a narrow-framed smart interactive tablet based on piezoelectric ceramic bending vibration, including a shell, a piezoelectric ceramic actuator and a driving circuit; the piezoelectric ceramic actuator detects the deformation of the thinning area on the surface of the shell to realize the detection of the pressing event, and the piezoelectric ceramic actuator generates a stretching vibration according to the driving electrical signal provided by the driving circuit, driving the thinning area of ​​the shell to generate bending vibration, providing tactile feedback for the user, avoiding the need to open a hole in the shell, and the virtual key position has no gap, ensuring the appearance of the electronic device product while also realizing the function of the key switch, so as to distinguish the key switch of the prior art from the need to open a hole in the shell appearance for installation, the appearance has a key gap, and the physical entity key method of the prior art requires a certain displacement stroke to press the key shell to start the key switch. And by changing the shape of the driving electrical signal in the driving circuit, different tactile feedback effects can be provided to the user, enhancing the user experience, so as to distinguish the virtual key of the prior art from only bringing a fixed tactile feedback effect to the user's fingers. In addition, the virtual key device of the narrow-framed smart interactive tablet does not need to be provided with a supporting structure under the shell, which can save components and reduce costs on the one hand; on the other hand, it can save space, facilitate the planning and design of the whole product, and meet the planning and design requirements of thinner and narrower electronic devices. This can solve the problem that the physical keys of existing electronic devices cause the appearance of electronic devices to be discontinuous and unsightly, and the waterproof and dustproof effect is reduced, or the virtual keys cannot meet the planning and design requirements of thinner and narrower electronic devices.

[0045] In order to facilitate the understanding of the above utility model concept of the present invention, the above utility model concept of the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] In one embodiment, Figure 1 As shown, the utility model provides a virtual key device for a narrow-framed smart interactive tablet. The virtual key device 1 for the narrow-framed smart interactive tablet is based on piezoelectric ceramic bending vibration and includes: a housing 11, a piezoelectric ceramic actuator 12 and a driving circuit 13; wherein:

[0047] The shell 11 includes a complete shell surface, and a partially thinned area 113 exists on the inner side 111 of the shell surface or the outer side 112 of the shell surface;

[0048] The piezoelectric ceramic actuator 12 is fixedly disposed inside the thinned area 113 on the surface of the housing;

[0049] The driving circuit 13 is electrically connected to the piezoelectric ceramic actuator 12;

[0050] When the piezoelectric ceramic actuator 12 detects that the thinned area 113 on the surface of the shell is deformed, it reports a detection signal to the drive circuit 13 to trigger a pressing event. After receiving the detection signal, the drive circuit 13 provides a driving electrical signal to the piezoelectric ceramic actuator 12, so that the piezoelectric ceramic actuator 12 generates telescopic vibration, which drives the thinned area 113 of the shell to generate bending vibration.

[0051] In the present embodiment, a virtual key device for a narrow-frame smart interactive tablet is provided, including a shell, a piezoelectric ceramic actuator and a driving circuit. The shell includes a complete shell surface, and there is a partial thinning area on the inner side or the outer side of the shell surface. The piezoelectric ceramic actuator is fixedly arranged inside the thinning area of ​​the shell surface, and the driving circuit is electrically connected to the piezoelectric ceramic actuator. When the piezoelectric ceramic actuator detects that the thinning area of ​​the shell surface is deformed, the piezoelectric ceramic actuator reports a detection signal to the driving circuit to trigger a pressing event. After receiving the detection signal, the driving circuit provides a driving electrical signal to the piezoelectric ceramic actuator, so that the piezoelectric ceramic actuator generates a telescopic vibration, which drives the thinning area of ​​the shell to generate a bending vibration. Thus, the piezoelectric ceramic actuator detects the deformation of the thinning area on the surface of the shell to realize the detection of the pressing event, and the piezoelectric ceramic actuator generates a stretching vibration according to the driving electrical signal provided by the driving circuit, which drives the thinning area of ​​the shell to generate a bending vibration, providing tactile feedback for the user, avoiding the need to open a hole in the shell, and the virtual key position has no gap, ensuring the appearance of the electronic device product while also realizing the function of the key switch, so as to distinguish the key switch of the prior art from the need to open a hole in the shell appearance for installation, the key gap in the appearance, and the need to press the key shell to have a certain displacement stroke to press the key switch in the way of using physical physical keys in the prior art. And by changing the shape of the driving electrical signal in the driving circuit, different tactile feedback effects can be provided to the user, enhancing the user experience, so as to distinguish the virtual keys of the prior art from only bringing fixed tactile feedback effects to the user's fingers. In addition, the virtual key device of the narrow-framed smart interactive tablet does not need to set a supporting structure under the shell, which can save components and reduce costs on the one hand; on the other hand, it can save space, facilitate the planning and design of the whole machine product, and meet the planning and design requirements of thinner and narrower whole machines for electronic equipment. This can solve the problem that the physical buttons of existing electronic devices cause the electronic devices to have discontinuous and unsightly appearance and reduced waterproof and dustproof effects, or the problem that the virtual buttons cannot meet the requirements of thinner and narrower overall planning and design of electronic devices.

[0052] In one embodiment, Figure 1 and Figure 2 As shown, the shell 11 includes a complete shell surface, and a partial thinning area 113 exists on the inner side 111 of the shell surface or the outer side 112 of the shell surface.

[0053] Specifically, the shell 11 includes a complete shell surface, and the shell surface is the surface where the virtual keys are set. For example, when the virtual keys are set on the shell frame, the shell surface is the shell frame surface.

[0054] The inner side 111 or the outer side 112 of the shell surface is distinguished by the outside and inside of the electronic device. The side inside the electronic device is the inner side 111 of the shell surface, and the side outside the electronic device is the outer side 112 of the shell surface.

[0055] The thinned area 113 may be disposed on the inner side 111 of the shell surface, occupying a portion of the inner side 111 of the shell surface. In this case, a recessed space is formed on the inner side 111 of the shell surface. Figure 1 and Figure 2 As shown, the thinned area 113 is disposed on the inner side 111 of the shell surface, so that a recessed space is formed on the inner side 111 of the shell surface.

[0056] The thinned area 113 may also be disposed on the outer side 112 of the shell surface, occupying a portion of the outer side 112 of the shell surface. In this case, a recessed space is formed on the outer side 112 of the shell surface.

[0057] Furthermore, if Figure 1 and Figure 2 As shown, the outer side 112 of the shell surface is divided into a button area 114 for users to press.

[0058] When the thinned area 113 can also be set on the outer side 112 of the shell surface, the button area 114 can occupy a part of the thinned area 113 or the whole area of ​​the thinned area 113 .

[0059] When the thinning area 113 can also be set on the inner side 111 of the shell surface, the button area 114 is located on the surface of the outer side 112 of the shell surface opposite to the inner side 111 of the shell surface where the thinning area 113 is located. The button area 114 can occupy a partial area of ​​the outer side 112 of the shell surface or the entire area of ​​the outer side 112 of the shell surface.

[0060] In this embodiment, a partial thinning area 113 is present on the inner side 111 of the shell surface or the outer side 112 of the shell surface, and the outer side 112 of the shell surface is divided into a key area 114. The piezoelectric ceramic actuator is fixedly arranged on the inner side of the thinning area of ​​the shell surface, so that the piezoelectric ceramic actuator can detect the deformation of the thinning area of ​​the shell surface to realize the detection of the pressing event, thereby avoiding the need to open a hole in the shell and ensuring that there is no gap at the virtual key position, thereby ensuring the appearance of the electronic device product while realizing the function of the key switch, so as to distinguish the key switch in the prior art from the need to open a hole in the shell appearance for installation, the key gap in the appearance, and the need to press the key shell to have a certain displacement stroke in the prior art using a physical entity key to start the key switch.

[0061] In one embodiment, the piezoelectric ceramic actuator 12 is fixedly disposed inside the thinned area 113 of the housing surface.

[0062] Specifically, Figure 1 As shown, the piezoelectric ceramic actuator 12 is fixedly arranged on the inner side of the thinned area 13 of the shell surface opposite to the key area 114. The piezoelectric ceramic actuator 12 is used to detect that the key area 114 on the shell surface is deformed and report a detection signal to the drive circuit 13.

[0063] The length of the piezoelectric ceramic actuator 12 may be greater than, equal to, or less than the length of the key area 114 on the outer side 112 of the housing surface. Preferably, the length of the piezoelectric ceramic actuator 12 is greater than the length of the key area 114 on the outer side 112 of the housing surface.

[0064] Exemplarily, the piezoelectric ceramic actuator 12 is a sheet piezoelectric ceramic actuator, which can further save space in electronic equipment, facilitate the planning and design of the entire electronic equipment product, and meet the planning and design requirements of thinner and narrower electronic equipment. For example, when virtual buttons are set on the border of the electronic device, a thinner and narrower border can be designed.

[0065] For example, the piezoelectric ceramic actuator 12 may include a single-layer piezoelectric ceramic actuator to reduce the voltage of the driving electrical signal.

[0066] The piezoelectric ceramic actuator 12 may also include a multilayer piezoelectric ceramic actuator to further reduce the voltage of the driving electrical signal.

[0067] In this embodiment, the piezoelectric ceramic actuator 12 is a sheet piezoelectric ceramic actuator, and the piezoelectric ceramic actuator 12 is fixedly arranged inside the thinned area 113 on the surface of the housing, which can save space, facilitate the planning and design of the whole machine product, and meet the requirements of thinner and narrower whole machine planning and design of electronic equipment (for example, when the button is set on the whole machine frame, a thinner and narrower frame can be designed). Thereby, the problem that the virtual buttons of the existing electronic equipment cannot meet the requirements of thinner and narrower whole machine planning and design of electronic equipment can be solved.

[0068] In one embodiment, the virtual key device 1 of the narrow-frame smart interactive tablet further includes a fixing component (not shown). The piezoelectric ceramic actuator 12 is fixedly disposed inside the thinned area 113 on the surface of the shell. Specifically, the piezoelectric ceramic actuator 12 is fixedly disposed inside the thinned area 113 on the surface of the shell through the fixing component.

[0069] For example, the fixing component is glue, and the piezoelectric ceramic actuator 12 is fixedly arranged on the inner side of the thinned area 113 on the shell surface by gluing, so that the piezoelectric ceramic actuator 12 can be more firmly arranged on the inner side of the thinned area 113 on the shell surface by gluing.

[0070] For another example, the fixing component is a screw, and the piezoelectric ceramic actuator 12 is fixedly arranged on the inner side of the thinned area 113 on the surface of the shell by the screw. At this time, the screw is fixed from the inner side of the thinned area 113 on the surface of the shell, and the length of the screw is greater than the thickness of the piezoelectric ceramic actuator 12, and less than the sum of the thickness of the piezoelectric ceramic actuator 12 and the thickness of the thinned area 113 on the surface of the shell, so that the screw cannot pass through the thinned area 113 on the surface of the shell. The piezoelectric ceramic actuator 12 can be more firmly arranged on the inner side of the thinned area 113 on the surface of the shell by screw locking, and disassembly and assembly are more convenient.

[0071] In this embodiment, the piezoelectric ceramic actuator 12 is fixedly arranged on the inner side of the thinned area 113 on the surface of the shell by using a fixing component, so that the virtual key device of the narrow-framed smart interactive tablet does not need to be provided with a supporting structure under the shell. On the one hand, it can save components and reduce costs (omit the supporting structure below); on the other hand, it can further save space (omit the supporting structure below), facilitate the planning and design of the whole machine product, and meet the planning and design requirements of thinner and narrower electronic equipment (for example, when the key is set on the frame of the whole machine, a thinner and narrower frame can be designed). Thereby, the problem that the virtual keys of existing electronic devices cannot meet the planning and design requirements of thinner and narrower electronic equipment can be solved.

[0072] In one embodiment, Figure 2 As shown, if the piezoelectric ceramic actuator 12 cannot detect the deformation of the thinned area 113 on the surface of the shell, the virtual button device 1 of the narrow-framed smart interactive tablet also includes: a pressure sensor 14, which is fixedly arranged on the inner side of the thinned area 113 on the surface of the shell, and the pressure sensor 14 is electrically connected to the drive circuit 13, and is used for detecting the deformation of the thinned area 113 on the surface of the shell, and reporting a detection signal to the drive circuit 13.

[0073] Specifically, if the piezoelectric ceramic actuator 12 cannot detect the deformation of the key area 114 on the shell surface, the pressure sensor 14 is used to detect the deformation of the key area 114 on the shell surface and report a detection signal to the driving circuit 13.

[0074] For example, the pressure sensor 14 may include a strain gauge, or the pressure sensor may also be a piezoelectric ceramic sensor.

[0075] Further, the pressure sensor 14 is fixedly disposed inside the thinned area 113 on the surface of the shell. Specifically, the pressure sensor 14 is fixedly disposed inside the thinned area 113 on the surface of the shell through the fixing assembly.

[0076] For example, the fixing component is glue, and the pressure sensor 14 is fixedly arranged on the inner side of the thinned area 113 on the surface of the shell by gluing, so that the pressure sensor 14 can be more firmly arranged on the inner side of the thinned area 113 on the surface of the shell by gluing.

[0077] For another example, the fixing component is a screw, and the pressure sensor 14 is fixedly arranged on the inner side of the thinned area 113 on the surface of the shell by the screw. At this time, the screw is fixed from the inner side of the thinned area 113 on the surface of the shell. The length of the screw is greater than the thickness of the pressure sensor, and less than the sum of the thickness of the pressure sensor 14 and the thinned area 113 on the surface of the shell, so that the screw cannot pass through the thinned area 113 on the surface of the shell. The pressure sensor 14 can be more firmly arranged on the inner side of the thinned area 113 on the surface of the shell by screw locking, and it is more convenient to disassemble and assemble.

[0078] In one embodiment, Figure 4 and Figure 5 As shown, the driving circuit 13 is electrically connected to the piezoelectric ceramic actuator 12 , and is used to collect the detection signal reported by the piezoelectric ceramic actuator 12 or the pressure sensor 14 to trigger a pressing event, and provide a driving electrical signal to the piezoelectric ceramic actuator 12 .

[0079] Specifically, Figure 1 and Figure 2 As shown, the driving circuit 13 can be fixedly arranged inside the thinning area 113 of the shell surface, or can be arranged at other positions on the shell surface. For example, the driving circuit 13 can be fixedly arranged inside the non-thinning area of ​​the shell surface.

[0080] like Figure 4 and Figure 5 As shown, the driving circuit 13 includes: a controller 131 and a power amplifier 132; wherein:

[0081] The controller 131 is electrically connected to the power amplifier 132 , and the controller 131 is electrically connected to the piezoelectric ceramic actuator 12 and / or the pressure sensor 14 , and is used to collect the detection signal reported by the piezoelectric ceramic actuator 12 or the pressure sensor 14 to trigger a pressing event, and provide a driving electrical signal to the power amplifier 132 .

[0082] Specifically, Figure 4As shown, if the piezoelectric ceramic actuator 12 can detect that the thinned area 113 on the surface of the shell is deformed, the virtual button device 1 of the narrow-frame smart interactive tablet does not include the pressure sensor 14. At this time, the controller 131 is electrically connected to the piezoelectric ceramic actuator 12 to collect the detection signal reported by the piezoelectric ceramic actuator 12 to trigger a pressing event, and provide a driving electrical signal to the power amplifier 132.

[0083] like Figure 5 As shown, if the piezoelectric ceramic actuator 12 cannot detect the deformation of the thinned area 113 on the surface of the shell, the virtual button device 1 of the narrow-frame smart interactive tablet includes a pressure sensor 14. At this time, the controller 131 is electrically connected to the piezoelectric ceramic actuator 12 and the pressure sensor 14 respectively, and is used to collect the detection signal reported by the pressure sensor 14 to trigger a pressing event, and provide a driving electrical signal to the power amplifier 132.

[0084] like Figure 4 and Figure 5 As shown, the power amplifier 132 is electrically connected to the piezoelectric ceramic actuator 12, and is used to amplify the driving electrical signal provided by the controller 131 to the voltage amplitude of the piezoelectric ceramic actuator 12, and then output it to the piezoelectric ceramic actuator 12, so that the piezoelectric ceramic actuator 12 generates stretching vibration, driving the button area 114 in the thinned area 113 of the shell to generate bending vibration.

[0085] Furthermore, the controller 131 pre-stores a variety of driving electrical signals as a variety of tactile feedback effects provided to the user for the user to select in the settings. By changing the shape of the driving electrical signal in the driving circuit, different tactile feedback effects are provided to the user, thereby enhancing the user experience, which is different from the virtual keys in the prior art that can only provide a fixed tactile feedback effect to the user's fingers.

[0086] Furthermore, if Figure 4 and Figure 5 As shown, the controller 131 is also connected to the host for communication, and is used to provide the press event to the host after the press event is triggered.

[0087] The utility model provides a virtual key device 1 for a narrow-framed intelligent interactive tablet, and its specific working process is as follows:

[0088] like Figure 3As shown, when the user presses the key area 114 on the housing 11, the thinning area 113 where the key area 114 is located is deformed, which is detected by the pressure sensor 14 or the piezoelectric ceramic actuator 12. The pressure sensor 14 or the piezoelectric ceramic actuator 12 reports the detection signal to the controller 131 of the drive circuit 13, thereby triggering a pressing event, and the controller 131 reports the pressing event to the host. At this time, after the pressing event is triggered, the controller 131 of the drive circuit 13 selects a driving electrical signal from a plurality of pre-stored driving electrical signals and provides it to the power amplifier 132. The power amplifier 132 amplifies the driving electrical signal provided by the controller 131 to the voltage amplitude of the piezoelectric ceramic actuator 12, and then outputs it to the piezoelectric ceramic actuator 12, so that the piezoelectric ceramic actuator 12 generates a stretching vibration, which drives the key area 114 in the thinning area 113 of the housing to generate a bending vibration, thereby providing tactile feedback to the user and enhancing the user experience.

[0089] Based on the same concept, Figure 6 As shown, the utility model further provides a narrow-border smart interactive tablet, and the narrow-border smart interactive tablet 100 includes the virtual button device 1 of the narrow-border smart interactive tablet described in any of the above embodiments.

[0090] In this embodiment, the virtual key device 1 of the narrow-border smart interactive tablet is consistent with the virtual key device 1 of the narrow-border smart interactive tablet described in any of the above embodiments. The specific structure and function can refer to the virtual key device 1 of the narrow-border smart interactive tablet described in any of the above embodiments, and will not be repeated here.

[0091] In the present embodiment, a narrow-framed smart interactive tablet is provided, including a virtual key device of the narrow-framed smart interactive tablet. The virtual key device of the narrow-framed smart interactive tablet includes a shell, a piezoelectric ceramic actuator and a driving circuit. The shell includes a complete shell surface, and there is a partial thinning area on the inner side or the outer side of the shell surface. The piezoelectric ceramic actuator is fixedly arranged inside the thinning area of ​​the shell surface, and the driving circuit is electrically connected to the piezoelectric ceramic actuator. When the piezoelectric ceramic actuator detects that the thinning area of ​​the shell surface is deformed, the piezoelectric ceramic actuator reports a detection signal to the driving circuit to trigger a pressing event. After receiving the detection signal, the driving circuit provides a driving electrical signal to the piezoelectric ceramic actuator, so that the piezoelectric ceramic actuator generates a telescopic vibration, which drives the thinning area of ​​the shell to generate a bending vibration. Thus, the piezoelectric ceramic actuator detects the deformation of the thinning area on the surface of the shell to realize the detection of the pressing event, and the piezoelectric ceramic actuator generates a stretching vibration according to the driving electrical signal provided by the driving circuit, which drives the thinning area of ​​the shell to generate a bending vibration, providing tactile feedback for the user, avoiding the need to open a hole in the shell, and the virtual key position has no gap, ensuring the appearance of the electronic device product while also realizing the function of the key switch, so as to distinguish the key switch of the prior art from the need to open a hole in the shell appearance for installation, the key gap in the appearance, and the need to press the key shell to have a certain displacement stroke to press the key switch in the way of using physical physical keys in the prior art. And by changing the shape of the driving electrical signal in the driving circuit, different tactile feedback effects can be provided to the user, enhancing the user experience, so as to distinguish the virtual keys of the prior art from only bringing fixed tactile feedback effects to the user's fingers. In addition, the virtual key device of the narrow-framed smart interactive tablet does not need to set a supporting structure under the shell, which can save components and reduce costs on the one hand; on the other hand, it can save space, facilitate the planning and design of the whole machine product, and meet the planning and design requirements of thinner and narrower whole machines for electronic equipment. This can solve the problem that the physical buttons of existing electronic devices cause the electronic devices to have discontinuous and unsightly appearance and reduced waterproof and dustproof effects, or the problem that the virtual buttons cannot meet the requirements of thinner and narrower overall planning and design of electronic devices.

[0092] It should be noted that the above-mentioned narrow-border smart interactive tablet embodiment and the above-mentioned narrow-border smart interactive tablet's virtual key device embodiment belong to the same concept, and the specific implementation process is detailed in the virtual key device embodiment of the narrow-border smart interactive tablet, and the technical features in the virtual key device embodiment of the narrow-border smart interactive tablet are correspondingly applicable in the above-mentioned narrow-border smart interactive tablet embodiment, which will not be repeated here.

[0093] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0094] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A virtual key device for a narrow-frame smart interactive tablet, characterized in that: The virtual key device of the narrow-frame smart interactive tablet comprises: a housing, a piezoelectric ceramic actuator and a driving circuit; wherein: The shell comprises a complete shell surface, and a partially thinned area exists inside or outside the shell surface; The piezoelectric ceramic actuator is fixedly arranged inside the thinned area of ​​the shell surface; The driving circuit is electrically connected to the piezoelectric ceramic actuator; When the piezoelectric ceramic actuator detects that the thinned area on the surface of the shell is deformed, it reports a detection signal to the drive circuit to trigger a pressing event. After receiving the detection signal, the drive circuit provides a driving electrical signal to the piezoelectric ceramic actuator, causing the piezoelectric ceramic actuator to generate telescopic vibration, thereby driving the thinned area of ​​the shell to generate bending vibration.

2. The virtual key device of the narrow-frame smart interactive tablet according to claim 1, characterized in that: The outer side of the shell surface is divided into a button area for users to press.

3. The virtual key device of the narrow-frame smart interactive tablet according to claim 2, characterized in that: The piezoelectric ceramic actuator is fixedly arranged inside the thinned area of ​​the shell surface opposite to the key area, and is used to report a detection signal to the drive circuit when the key area on the shell surface is detected to be deformed.

4. The virtual key device of the narrow-frame smart interactive tablet according to claim 1, characterized in that: The virtual key device of the narrow-frame smart interactive tablet also includes a fixing component; the piezoelectric ceramic actuator is fixedly arranged on the inner side of the thinned area on the surface of the shell through the fixing component.

5. The virtual key device of the narrow-frame smart interactive tablet according to claim 1, characterized in that: The piezoelectric ceramic actuator is a sheet-shaped piezoelectric ceramic actuator.

6. The virtual key device of the narrow-frame smart interactive tablet according to claim 1, characterized in that: If the piezoelectric ceramic actuator cannot detect deformation of the thinned area on the surface of the shell, the virtual button device of the narrow-framed smart interactive tablet also includes a pressure sensor, which is fixedly arranged on the inside of the thinned area on the surface of the shell and electrically connected to the drive circuit. When the thinned area on the surface of the shell is detected, the pressure sensor reports a detection signal to the drive circuit.

7. The virtual key device of the narrow-frame smart interactive tablet according to claim 6, characterized in that: The pressure sensor includes a strain gauge or a piezoelectric ceramic sensor.

8. The virtual key device of the narrow-frame smart interactive tablet according to claim 6, characterized in that: The driving circuit includes a controller and a power amplifier; wherein: The controller is electrically connected to the power amplifier, and the controller is electrically connected to the piezoelectric ceramic actuator and / or the pressure sensor, and is used to collect the detection signal reported by the piezoelectric ceramic actuator or the pressure sensor to trigger a pressing event, and provide a driving electrical signal to the power amplifier; The power amplifier is electrically connected to the piezoelectric ceramic actuator, and is used to amplify the driving electrical signal provided by the controller to the voltage amplitude at which the piezoelectric ceramic actuator operates, and then output it to the piezoelectric ceramic actuator, so that the piezoelectric ceramic actuator generates telescopic vibration, thereby driving the thinned area of ​​the shell to generate bending vibration.

9. The virtual key device of the narrow-frame smart interactive tablet according to claim 8, characterized in that: The controller is also in communication connection with the host, and is used for providing the press event to the host after the press event is triggered.

10. A narrow-frame smart interactive tablet, characterized in that: The narrow-border smart interactive tablet comprises the virtual button device of the narrow-border smart interactive tablet according to any one of claims 1 to 9.

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