Wearable device and electronic device

Abstract

The present application relates to a wearable device and an electronic device. The wearable device comprises a rear housing, a piezoelectric module and a driving module, the piezoelectric module being arranged on the inner surface of the rear housing, and the driving module being electrically connected to the piezoelectric module and used for driving the piezoelectric module to vibrate, so that the vibration of the piezoelectric module drives the rear housing to vibrate. The technical solution of the present application can reduce spaces occupied by vibration or sound production components in electronic devices, helping to thin and miniaturize the electronic devices.

Description

Wearable devices and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on December 12, 2023, with application number 202311704747.0, and priority to the Chinese patent application with the invention name “Wearable Devices and Electronic Devices”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a wearable device and an electronic device. Background Art

[0003] With the development of electronic technology, users have increasingly higher requirements for the appearance and performance of electronic devices. Currently, some electronic devices used for user interaction (such as speakers and motors) occupy a large amount of installation space inside the electronic devices, which makes it difficult to further miniaturize the electronic devices. Therefore, how to reduce the space occupied by components used for vibration or sound generation in electronic devices is currently a pressing issue. Summary of the Invention

[0004] The embodiments of the present application provide a wearable device and an electronic device, which can reduce the space occupied by devices used for vibration or sound generation in the electronic device, thereby facilitating the thinning and miniaturization of the electronic device.

[0005] In a first aspect, the present application provides a wearable device, including a back shell, a piezoelectric module and a driving module. The piezoelectric module is arranged on the inner surface of the back shell, the driving module is electrically connected to the piezoelectric module, and the driving module is used to drive the piezoelectric module to vibrate, so that the vibration of the piezoelectric module drives the vibration of the back shell.

[0006] In this embodiment, the piezoelectric module can produce different bending vibrations by varying the driving voltage. Under the control of the driving module, the piezoelectric module can vibrate and drive the rear housing to vibrate, achieving vibration or sound by varying parameters such as vibration frequency or amplitude.

[0007] Since piezoelectric materials are generally plate-shaped, the space occupied by the piezoelectric module is relatively small. Using a piezoelectric module instead of a speaker and / or a motor can save space inside the wearable device, thereby making the wearable device further miniaturized and thinner. The tactile sensation of the vibration of the bottom shell in the back shell can be directly felt by the user's skin, or the sound waves generated by the vibration of the bottom shell in the back shell can be received by the user's ears, thereby realizing the vibration or sound-generating function of the wearable device. In addition, when the user wears the wearable device, since the back shell can directly contact the user's skin, when the bottom shell in the back shell vibrates under the drive of the piezoelectric module, the user can more easily perceive the vibration reminder of the wearable device.

[0008] Secondly, compared with traditional electromagnetic speakers for sound generation and motors for providing vibration touch, the piezoelectric module provided in this application consumes less power and generates less heat during operation, thereby avoiding local overheating of wearable devices.

[0009] Furthermore, since the piezoelectric module can directly drive the vibration of the back shell, the wearable device using the piezoelectric module does not need to be provided with a speaker hole to transmit sound waves, so that the wearable device has better waterproof performance. Therefore, the wearable device provided by the embodiment of the present application can also be used in underwater scenes. When the wearable device is used in an underwater scene, the user's skin can directly sense the vibration of the back shell, and the vibration of the back shell can be transmitted within a certain range through the water body to buzz the user, so the user can also hear the sound emitted by the wearable device underwater. The wearable device is applicable to a variety of usage scenarios, which improves the reliability of the wearable device.

[0010] When the vibration frequency of the piezoelectric module is less than or equal to 200 Hz, the wearable device can provide a vibrating tactile sensation to the user. When the vibration frequency of the piezoelectric module is greater than 20 Hz, the wearable device can play music or emit a ringtone.

[0011] The piezoelectric module includes a single layer of piezoelectric material, or the piezoelectric module includes multiple layers of piezoelectric material.

[0012] In a possible implementation, the piezoelectric module is bonded to the inner surface of the rear housing.

[0013] In this embodiment, because the piezoelectric module is bonded to the back cover, the vibration of the piezoelectric module can drive the vibration of the entire back cover. As a result, when the wearable device vibrates, the user feels a stronger vibration. The amplitude of vibration in each area of ​​the back cover is essentially the same, making the vibration of the back cover perceived by the user more uniform.

[0014] The piezoelectric module is connected to the rear shell through injection molding.

[0015] In this embodiment, the injection molding connection can make the connection between the piezoelectric module and the back shell more secure, so that the vibration of the piezoelectric module can be better transmitted to the bottom shell in the back shell, avoiding the obvious attenuation of the vibration amplitude during the transmission of the vibration of the piezoelectric module to the bottom shell, and ensuring that the user can clearly identify the vibration of the bottom shell.

[0016] Alternatively, the piezoelectric module is bonded to the rear housing by adhesive, which may be double-sided adhesive or adhesive dispensed.

[0017] In a possible implementation, the piezoelectric module has a shape of a frame, a rectangle, a circle, a sector, or a sector ring.

[0018] In this embodiment, the shape of the piezoelectric module can be adjusted to adapt to the shape of the back shell and the installation space inside the wearable device. When the shape of the piezoelectric module is a frame, the inner space of the piezoelectric module can be used for installing a driving module or other functional devices. When the shape of the piezoelectric module is rectangular or circular, the shape of the back shell can be roughly the same as the piezoelectric module, so that the piezoelectric module can fit the back shell over a large area. When the piezoelectric module vibrates, it can drive the entire back shell to vibrate, thereby enhancing the vibration of the wearable device. When the piezoelectric module is fan-shaped, the piezoelectric module can fit with part of the back shell, so that only part of the wearable device can provide a vibrating touch, making the vibration of the wearable device more concentrated, thereby enhancing the user experience. When the piezoelectric module is a fan ring, the gap in the fan ring can be used to accommodate some other functional components of the wearable device, so that the wearable device has more functions without increasing its volume.

[0019] In a possible implementation, the wearable device further includes a first functional component, the piezoelectric module is frame-shaped, and the first functional component is located inside the piezoelectric module.

[0020] The first functional component is a sensor and / or an LED lamp.

[0021] In this embodiment, the piezoelectric module is positioned around the first functional device, with the center of the piezoelectric module providing a mounting location for the first functional device. This allows the piezoelectric module and the first functional device to be installed simultaneously in the wearable device without interfering with each other. The wearable device can emit light to alert the user, for example. Alternatively, the signal emitted by the first functional device can be directed outside the wearable device. The wearable device can use this signal to identify the user's status.

[0022] In one possible implementation, the wearable device includes a second functional component, which is disposed in an edge area of ​​the rear shell. The second functional component includes a sound-emitting component and / or a vibration component, and the second functional component does not overlap with the piezoelectric module.

[0023] In this embodiment, the vibrating member can vibrate simultaneously with the piezoelectric module, so that the vibration effect of the wearable device is more obvious and a clearer vibration feeling is provided to the user. And because the vibration mode of the vibrating member and the piezoelectric module are different, the vibration sense provided by the vibrating member and the piezoelectric module is also different. Therefore, the wearable device can provide three kinds of vibration sense, namely, the vibration sense generated by the vibration of the vibrating member, the vibration sense generated by the vibration of the piezoelectric module, and the vibration sense generated by the simultaneous vibration of the vibrating member and the piezoelectric module. Users can set different vibration senses for different usage scenarios. Alternatively, the sounding member can make a sound at the same time as the piezoelectric module, so that the wearable device can have a variety of different sound effects, making the sound emitted by the wearable device richer.

[0024] In addition, the second functional device does not overlap with the piezoelectric module, and there can be a gap between the piezoelectric module and the first limiter, which can prevent the first limiter from hindering the vibration of the piezoelectric module, avoid affecting the vibration and sound effects of the piezoelectric module, and ensure the normal operation of the piezoelectric module.

[0025] In one possible embodiment, the wearable device further includes a battery, the piezoelectric module includes a first surface and a second surface, the first surface and the second surface are arranged back to back, the first surface faces the rear shell, the battery is located on one side of the second surface of the rear shell, and there is a gap between the battery and the second surface of the piezoelectric module.

[0026] In this embodiment, since there is a gap between the piezoelectric module and the battery, when the piezoelectric module vibrates, the vibration of the piezoelectric module will not be hindered by the battery, thereby avoiding the squeezing of the battery, which causes the vibration amplitude of the piezoelectric module to attenuate, and ensures that the vibration amplitude of the piezoelectric module and the back shell is large enough so that the user can clearly perceive the vibration of the piezoelectric module and the back shell.

[0027] In a possible implementation, the driving module is located between the second surface and the battery, with a gap between the driving module and the second surface; or the driving module is located on a side of the battery facing away from the piezoelectric module.

[0028] In one possible embodiment, there are two driving modules, namely a first driving module and a second driving module. The first driving module is located on one side of the second surface of the piezoelectric module, and the second driving module is located on the side of the battery facing the piezoelectric module. The second driving module is electrically connected to the first driving module, and the second driving module is electrically connected to the piezoelectric module.

[0029] In one possible embodiment, the back shell is provided with a receiving hole, which passes through the back shell. The wearable device also includes a mounting bracket, which is mounted in the receiving hole. The mounting bracket is located on the side of the second driving module away from the battery, and the first functional device is connected to the mounting bracket.

[0030] In this embodiment, the mounting frame can provide a mounting location for the first functional component.

[0031] In a possible implementation, the wearable device further includes a protective cover connected to an outer surface of the rear shell, and the protective cover covers the accommodating hole.

[0032] In this embodiment, the protective cover can cover the receiving hole of the bottom shell and the first functional component. The protective cover can protect the first functional component of the wearable device and prevent the first functional component from being impacted by foreign objects or affected by moisture and dust.

[0033] In a possible implementation, the wearable device further includes a fixing strap connected to the rear shell, and the fixing strap is used to be worn by a user.

[0034] On the second aspect, the present application also provides an electronic device, which includes a back shell, a piezoelectric module, a driving module and a processor. The piezoelectric module is arranged on the inner surface of the back shell, the processor is electrically connected to the driving module, and the driving module is electrically connected to the piezoelectric module. The processor controls the driving module to drive the piezoelectric module to vibrate, so that the vibration of the piezoelectric module drives the vibration of the back shell.

[0035] In this embodiment, the processor generates an electrical signal to the drive module. The waveform of the electrical signal emitted by the processor can be a vibration waveform or a sound waveform. The vibration waveform is a waveform that causes the piezoelectric module to vibrate and provide a vibratory tactile sensation to the user. The sound waveform is a waveform that causes the piezoelectric module to emit a sound. The drive module can further amplify the electrical signal emitted by the processor and apply a voltage to the piezoelectric module. The piezoelectric module can vibrate under the influence of the voltage applied by the drive module.

[0036] When the vibration frequency of the piezoelectric module is less than 200Hz, the wearable device can provide a vibrating tactile sensation to the user. When the vibration frequency of the piezoelectric module is greater than 20Hz, the vibration sound waves of the piezoelectric module can be recognized by the user, thus providing the user with an auditory experience such as a sound reminder or music.

[0037] In a third aspect, the present application further provides a method for operating a wearable device, comprising:

[0038] The processor sends a first signal;

[0039] The driving module receives the first signal and sends a second signal; and

[0040] The piezoelectric module receives the second signal and vibrates.

[0041] The first signal may be a vibration waveform or a sound waveform, and the vibration waveform and the sound waveform have different amplitudes and frequencies.

[0042] The driving module is capable of amplifying the waveform of the first signal. The second signal is the first signal amplified by the driving module.

[0043] The vibration frequency of the piezoelectric module is the same as the waveform conversion frequency of the second signal, and the vibration amplitude of the piezoelectric module is positively correlated with the waveform amplitude of the second signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained like these drawings without any creative work.

[0045] FIG1 is a schematic structural diagram of a wearable device provided in an embodiment of the present application;

[0046] FIG2 is a schematic cross-sectional view of the wearable device shown in FIG1 ;

[0047] FIG3 is a schematic structural diagram of the rear housing and the piezoelectric module shown in FIG2 ;

[0048] FIG4 is a graph showing the frequency response of a piezoelectric module at different driving voltages as a function of frequency;

[0049] FIG5 is a schematic diagram of a partial structure of the wearable device shown in FIG1 under a second embodiment;

[0050] FIG6 is another cross-sectional schematic diagram of the wearable device shown in FIG1 ;

[0051] FIG7 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a third embodiment;

[0052] FIG8 is a partially exploded schematic diagram of the wearable device shown in FIG7 ;

[0053] FIG9 is a graph showing frequency responses of piezoelectric modules of different areas as a function of frequency;

[0054] FIG10 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a fourth embodiment;

[0055] FIG11 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a fifth embodiment;

[0056] FIG12 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a sixth embodiment;

[0057] FIG13 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a seventh embodiment;

[0058] FIG14 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to an eighth embodiment;

[0059] FIG15 is a schematic diagram of a partial structure of the wearable device shown in FIG1 according to a ninth embodiment;

[0060] FIG16 is another exploded schematic diagram of the wearable device shown in FIG1 ;

[0061] FIG17 is a graph showing the frequency response of the piezoelectric module under different loads as a function of frequency;

[0062] FIG18 is a schematic diagram of a partial structure of another wearable device provided in an embodiment of the present application;

[0063] FIG19 is a flow chart of a working method of the wearable device shown in FIG1 . DETAILED DESCRIPTION

[0064] The specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can also be implemented in other ways than those described herein, and therefore, the present application is not limited to the following embodiments.

[0065] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0066] And / or: It is just a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0067] Multiple: refers to two or more than two.

[0068] Connection: should be understood in a broad sense. For example, A and B are connected, which can be either directly connected or indirectly connected through an intermediary.

[0069] The specific implementation of the present application will be clearly described below with reference to the accompanying drawings.

[0070] The present application provides an electronic device. The electronic device may be a smart consumer electronic device such as a mobile phone, a tablet computer, or a laptop computer. Alternatively, the electronic device may be a wearable device such as augmented reality (AR), virtual reality (VR), smart glasses, smart goggles, a smart watch, a smart bracelet, a head-mounted wireless headset, a bone conduction wireless headset, a neckband wireless headset, or a true wireless stereo (TWS) headset.

[0071] For ease of understanding, the following description will be made using wearable devices, which are electronic devices with a wide range of users and rich application scenarios, as an example, but the description is not limited to this.

[0072] In the first possible embodiment, please refer to Figures 1 and 2 in combination. Figure 1 is a structural schematic diagram of the wearable device 100 provided in an embodiment of the present application. Figure 2 is a cross-sectional schematic diagram of the wearable device 100 shown in Figure 1. Exemplarily, the wearable device 100 includes a fixing strap 1002 and a device body 1001. The fixing strap 1002 is connected to the periphery of the device body 1001. There may be two fixing straps 1002, and the two fixing straps 1002 are respectively a first fixing strap 1003 and a second fixing strap 1004. The first fixing strap 1003 and the second fixing strap 1004 are respectively connected to opposite sides of the device body 1001. The first fixing strap 1002 may be provided with a first locking portion (not shown in the figure), and the second fixing strap 1004 may be provided with a second locking portion (not shown in the figure). The first locking portion and the second locking portion are detachably locked to each other so that the wearable device 1000 can be worn on the user's wrist. It should be understood that the matching structure between the first locking part and the second locking part can be a watch buckle structure such as a hook buckle, a hidden buckle, a butterfly buckle, a belt snap buckle, a folding safety buckle, a folding buckle or a pin buckle, and this application does not make specific limitations on this.

[0073] Referring to Figure 2 , the device body 1001 may include a rear housing 10, a top cover 20, a piezoelectric module 30, a battery 40, a driver module 50, and a processor (not shown). The top cover 20 is mounted on the rear housing 10 and together with the rear housing 10, forms a receiving space 101. The piezoelectric module 30, battery 40, driver module 50, and processor may all be mounted within the receiving space 101.

[0074] Please refer to Figures 2 and 3 in conjunction. Figure 3 is a schematic structural diagram of the assembly of the back shell 10 and the piezoelectric module 30 shown in Figure 2. The back shell 10 may include a bottom shell 11 and a side shell 12. The side shell 12 is fixedly connected to one side of the bottom shell 11 and is arranged around the bottom shell 11. The bottom shell 11 includes a third surface 111 and a fourth surface 110. The third surface 111 and the fourth surface 110 are arranged opposite to each other along the thickness direction of the bottom shell 11. The third surface 111 is the surface of the bottom shell 11 facing the receiving space 101. The third surface 111 can be referred to as the inner surface of the bottom shell 11 or the inner surface of the back shell 10, and the fourth surface 110 can be referred to as the outer surface of the bottom shell 11 or the outer surface of the back shell 10. Exemplarily, the bottom shell 11 and the side shell 12 can be an integrated structure. When the wearable device 100 is a watch, the back shell 10 can be the part of the watch that contacts the user's arm. The outer periphery of the side shell 12 can be connected to the fixing band 1002. For example, the first fixing belt 1003 and the second fixing belt 1004 may be connected to opposite sides of the side shell 12 respectively.

[0075] Please refer to Figure 2 again. The top cover 20 is installed on the side of the side shell 12 away from the bottom shell 11. The top cover 20 can form the shell of the wearable device 100 together with the back shell 10. Exemplarily, the top cover 20 can be a display screen or a dial. The display screen can be used to display information such as time, icons or physiological parameters of the user. The dial can be used to display information such as time and date. It should be noted that in this application, the surface of one "away from" the other is expressed as the surface of the former away from the latter. For example, in two upper and lower stacked structures, the upper surface of the upper structure is the surface of the upper structure away from the lower structure. The lower surface of the upper structure is the surface of the upper structure facing the lower structure.

[0076] The display screen includes a cover plate and a display panel fixed on the cover plate. The cover plate can be made of a transparent material such as glass. The display panel can be an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode) display screen, an AMOLED (Active-Matrix Organic Light Emitting Diode) display screen, an FLED (Flex Light-Emitting Diode) display screen, a Mini LED, a Micro LED, a Micro OLED, a QLED (Quantum Dot Light Emitting Diodes), etc. The display panel can also be integrated with a touch function, that is, the display panel is a touch display panel, that is, the display panel can be used as both an input device for receiving input and a device for providing output.

[0077] The battery 40 is spaced apart from the third surface 111 of the bottom case 11 along the thickness direction of the device body 1001. The battery 40 can power the electronic components of the wearable device 100 (such as the piezoelectric module 30, the processor, the driving module 50, etc.).

[0078] The driver module 50 can be located on the side of the battery 40 facing away from the bottom housing 11. Alternatively, the driver module 50 can be located on the side of the battery 40 facing the bottom housing 11. The driver module 50 is electrically connected to the battery 40. The driver module 50 can be a circuit board provided with a driver circuit. The processor is electrically connected to the driver module 50. The processor can be a coprocessor or a main processor. The coprocessor can be a microcontroller unit (MCU). The main processor can be an application processor (AP).

[0079] In this embodiment, the processor generates an electrical signal to the driver module 50. The waveform of the electrical signal generated by the processor can be a vibration waveform or a sound waveform. The driver module 50 receives the electrical signal generated by the processor and can process the electrical signal generated by the processor. For example, the driver module 50 can amplify the electrical signal generated by the processor, or the driver module 50 can control the amplitude and waveform of the electrical signal generated by the processor.

[0080] The piezoelectric module 30 is electrically connected to the driving module 50 and can vibrate under the drive of the driving module 50. Specifically, depending on the size and waveform of the electrical signal output by the driving module 50, the piezoelectric module 30 can vibrate within different frequency points or frequency bands to achieve vibration or sound.

[0081] When the waveform of the electrical signal emitted by the processor is a vibration waveform, the driver module 50 applies a voltage to the piezoelectric module 30 based on the vibration waveform, causing the piezoelectric module 30 to vibrate and provide a vibratory tactile sensation to the user. In this case, the vibration frequency of the piezoelectric module 30 is less than 200 Hz. When the waveform of the electrical signal emitted by the processor is a sound waveform, the driver module 50 applies a voltage to the piezoelectric module 30 based on the sound waveform, causing the piezoelectric module 30 to vibrate and generate sound waves. The user can receive these sound waves and hear the sound emitted by the wearable device 100. In this case, the vibration frequency of the piezoelectric module 30 is greater than 20 Hz.

[0082] Currently, making wearable devices thinner and lighter is a trend in market design and future evolution. Typical wearable devices use sound-generating devices or vibration devices to provide prompts to users. However, these devices are large in size and occupy a large amount of space inside the wearable device, preventing the wearable device from being further thinned and lightweight. The piezoelectric module 30 of the embodiment of the present application can replace the sound-generating device or vibration device, reducing the installation space required for the sound-generating device or vibration device, thereby making the wearable device 100 further thinner and smaller.

[0083] The piezoelectric module 30 is mounted on the third surface 111 of the bottom shell 11 in the rear shell 10. The vibration of the piezoelectric module 30 can drive the bottom shell 11 to vibrate, which helps to increase the vibration amplitude. The piezoelectric module 30 and the rear shell 10 can be connected by integral injection molding. In one possible embodiment, the piezoelectric module 30 and the rear shell 10 can be connected by insert injection molding. Insert injection molding refers to the process of injecting a medium such as resin after loading a pre-prepared piezoelectric module 30 and a rear shell 10 into a mold, and then bonding the molten material to the piezoelectric module 30 and the rear shell 10 and curing to form an integrated product. In another possible embodiment, the piezoelectric module 30 can be placed in the mold of the rear shell 10, and the injection molding medium can be injected into the mold. The molten material bonds to the piezoelectric module 30 and curing, so that the rear shell 10 is directly connected to the piezoelectric module 30 during the molding process.

[0084] In this embodiment, the injection molding connection can make the connection between the piezoelectric module 30 and the rear shell 10 more secure, so that the vibration of the piezoelectric module 30 can be better transmitted to the bottom shell 11 in the rear shell 10, avoiding the obvious attenuation of the vibration amplitude during the transmission of the vibration of the piezoelectric module 30 to the bottom shell 11, and ensuring that the user can clearly identify the vibration of the bottom shell 11.

[0085] The piezoelectric module 30 may be in the shape of a circular flat plate. In other embodiments, the piezoelectric module 30 may also be in the shape of a rounded rectangle, or a special shape. The piezoelectric module 30 includes a first surface 31 and a second surface 32. The first surface 31 and the second surface 32 are arranged opposite to each other in the thickness direction of the piezoelectric module 30. The first surface 31 of the piezoelectric module 30 faces the third surface 111 of the bottom shell 11. The shape and size of the first surface 31 of the piezoelectric module 30 may be the same as or similar to the shape and size of the third surface 111 of the bottom shell 11. The first surface 31 of the piezoelectric module 30 is in contact with the third surface 111 of the bottom shell 11. The second surface 32 faces away from the third surface 111 of the bottom shell 11. There may be a gap between the second surface 32 of the piezoelectric module 30 and both the battery 40 and the driving module 50. In other words, the second surface 32 of the piezoelectric module 30 may not be in contact with either the battery 40 or the driving module 50.

[0086] In this embodiment, since there is a gap between the piezoelectric module 30 and the battery 40 and the driving module 50, when the piezoelectric module 30 vibrates, the vibration of the piezoelectric module 30 will not be hindered by the battery 40 or the driving module 50, thereby avoiding the squeezing of the battery 40 or the driving module 50, which causes the vibration amplitude of the piezoelectric module 30 to attenuate, ensuring that the vibration amplitude of the piezoelectric module 30 and the back shell 10 is large enough so that the user can clearly perceive the vibration of the piezoelectric module 30 and the back shell 10.

[0087] In some possible embodiments, a connecting layer (not shown) may be provided between the piezoelectric module 30 and the bottom housing 11 of the rear housing 10. Specifically, the connecting layer is located between the first surface 31 of the piezoelectric module 30 and the third surface 111 of the bottom housing 11. The connecting layer allows the first surface 31 of the piezoelectric module 30 to be tightly adhered to the third surface 111 of the rear housing 10. Exemplarily, the connecting layer may be double-sided tape, adhesive, or a common colloid.

[0088] It should be noted that the material of the piezoelectric module 30 includes piezoelectric material. The piezoelectric module 30 may include a single layer or multiple layers of piezoelectric material. When a voltage is applied to the piezoelectric material, the piezoelectric material will generate mechanical stress, also known as the inverse piezoelectric effect. The piezoelectric module 30 provided in the embodiment of the present application can perform different bending vibrations by changing the driving voltage. Among them, the material of the piezoelectric module 30 may include crystalline piezoelectric material, ceramic piezoelectric material, etc.

[0089] In this embodiment, the piezoelectric module 30 can be circular or approximately circular in shape. The shape of the piezoelectric module 30 can be the same as that of the bottom shell 11. The vibration of the piezoelectric module 30 can drive the entire bottom shell 11 to vibrate, so that when the wearable device 100 worn by the user vibrates, the user feels a stronger vibration. Because the piezoelectric module 30 can be in contact with the third surface 111 of the bottom shell 11, the amplitude of vibration in each area of ​​the bottom shell 11 is substantially the same, making the vibration of the rear shell 10 perceived by the user more uniform. The wearable device 100 in this embodiment has a larger vibration area, which helps the wearable device 100 provide clearer and stronger vibration alerts, allowing the user to feel the vibration of the wearable device 100 more strongly. Because piezoelectric materials are generally plate-shaped, the piezoelectric module 30 occupies a smaller space. Using the piezoelectric module 30 instead of a speaker and / or motor can save space within the wearable device 100, thereby further miniaturizing and reducing the weight of the wearable device 100. The tactile sensation of the vibration of the bottom shell 11 in the rear shell 10 can be directly felt by the user's skin, or the sound waves generated by the vibration of the bottom shell 11 in the rear shell 10 can be received by the user's ears, thereby realizing the vibration or sound generation function of the wearable device 100. Furthermore, when the user wears the wearable device 1000, because the back shell 10 can directly contact the user's skin, when the bottom shell 11 in the rear shell 10 vibrates driven by the piezoelectric module 30, the user is more likely to perceive the vibration reminder of the wearable device 1000.

[0090] Secondly, compared with traditional electromagnetic speakers for sound generation and motors for providing vibration tactile sensation, the piezoelectric module 30 provided in the present application consumes less power and generates less heat during operation, thereby avoiding local overheating of the wearable device 100.

[0091] Furthermore, since the piezoelectric module 30 can directly drive the back shell 10 to vibrate, the wearable device 100 using the piezoelectric module 30 does not need to be provided with a speaker hole to transmit sound waves, so that the wearable device 100 has better waterproof performance. Therefore, the wearable device 100 provided in the embodiment of the present application can also be used in underwater scenes. When the wearable device 100 is used in an underwater scene, the user's skin can directly sense the vibration of the back shell 10, and the vibration of the back shell 10 can be transmitted within a certain range through the water body to buzz the user, so the user can also hear the sound emitted by the wearable device 100 underwater. The wearable device 100 is applicable to a variety of usage scenarios, which improves the reliability of the wearable device 100.

[0092] The embodiment of the present application also explores the relationship between the driving voltage and frequency response of the piezoelectric module 30 .

[0093] Please refer to Figure 4, which is a graph showing the frequency response of the piezoelectric module 30 as a function of frequency at different driving voltages. The three curves shown in Figure 4 are a first curve 1, a second curve 2, and a third curve 3. Curve 1 is the frequency response curve measured when the driving voltage of the piezoelectric module 30 is 8V. Curve 2 is the frequency response curve measured when the driving voltage of the piezoelectric module 30 is 6V. Curve 3 is the frequency response curve measured when the driving voltage of the piezoelectric module 30 is 4V.

[0094] It can be seen from Figure 4 that the greater the driving voltage of the piezoelectric module 30, the greater the frequency response of the piezoelectric module 30. It can also be seen from Figure 4 that the integral area formed by the first curve 1 is larger. The integral area formed by the first curve 1 is larger than the integral area formed by the second curve 2 and the third curve 3. The larger the integral area of ​​the curve in Figure 4, the greater the sound energy of the piezoelectric module 30 under the driving voltage. Therefore, compared with the working conditions of the piezoelectric module 30 at a driving voltage of 6V and 4V, the sound emitted by the piezoelectric module 30 at a driving voltage of 8V is easier for the user to hear. Therefore, when the wearable device 100 is in use, the driving voltage of the piezoelectric module 30 can be increased as much as possible, so that the sound emitted by the wearable device 100 is louder.

[0095] In a second possible embodiment, please refer to FIG5 , which is a schematic diagram of a portion of the structure of the wearable device 100 shown in FIG1 , according to the second embodiment. Unlike the first possible embodiment, the bottom housing 11 includes a first sub-portion 112 and a second sub-portion 113 , which are fixedly connected to each other. The first sub-portion 112 and the second sub-portion 113 can both be fan-shaped. The piezoelectric module 30 is connected to the first sub-portion 112 of the bottom housing 11. The piezoelectric module 30 can also be fan-shaped.

[0096] In this embodiment, when the piezoelectric module 30 vibrates, it can directly drive the first subsection 112 of the bottom housing 11 to vibrate. The vibration of the first subsection 112 of the bottom housing 11 can drive the second subsection 113 of the bottom housing 11 to vibrate. The vibration amplitude of the first subsection 112 is greater, while the vibration amplitude of the second subsection 113 is smaller than that of the first subsection 112.

[0097] In a first possible embodiment, when a user wears the wearable device 100 of the first embodiment described above, when the wearable device 100 vibrates, the entire bottom shell 11 can directly vibrate along with the piezoelectric module 30, and the user's skin in contact with the bottom shell 11 can feel the vibration. In this embodiment, the piezoelectric module 30 is in contact only with the first sub-portion 112 of the bottom shell 11. Therefore, when a user wears the wearable device 100 of the second embodiment, the vibration felt by the user's skin in contact with the first sub-portion 112 of the bottom shell 11 is more obvious. Compared with the wearable device 100 of the first embodiment, the vibration area of ​​the wearable device 100 of the second embodiment is smaller, and the user using the wearable device 100 of the second embodiment will feel a more concentrated vibration. Since in actual use, the vibration of the wearable device 100 generally produces sound, in a quiet environment, such as a meeting or a movie theater, the sound generated by the vibration can easily affect others. Therefore, since the vibration area of ​​the wearable device 100 of the second embodiment is smaller, the wearable device 100 of the second embodiment is quieter when vibrating, thereby avoiding the vibration of the wearable device 100 disturbing others in relatively quiet occasions such as meetings.

[0098] In a third possible embodiment, please refer to Figures 6-8. Figure 6 is another cross-sectional schematic diagram of the wearable device 100 shown in Figure 1. Figure 7 is a partial structural schematic diagram of the wearable device 100 shown in Figure 1 according to the third embodiment. Figure 8 is a partial exploded schematic diagram of the wearable device 100 shown in Figure 7.

[0099] The wearable device 100 shown in this embodiment is different from the wearable device 100 shown in the first embodiment described above in that the bottom shell 11 is provided with a receiving hole 114. The receiving hole 114 can be provided in the middle of the bottom shell 11 and penetrate the bottom shell 11 along the thickness direction of the bottom shell 11. Exemplarily, the receiving hole 114 is a circular hole. The piezoelectric module 30 surrounds the receiving hole 114 and is spaced apart from the receiving hole 114. Among them, the piezoelectric module 30 is frame-shaped. Exemplarily, the shape of the piezoelectric module 30 can be a circular frame. In some other embodiments, the piezoelectric module 30 can also be a rectangular frame or a fan ring.

[0100] The wearable device 100 may further include a mounting frame 55, a first functional device 60, a protective cover 70, and two driving modules 50. The mounting frame 55 is mounted in the receiving hole 114 and is located inside the piezoelectric module 30. The mounting frame 55 is provided with mounting holes 551. The mounting holes 551 extend through the mounting frame 55 along its thickness. The number of mounting holes 551 can be adjusted based on the number of first functional devices 60.

[0101] The first functional device 60 is connected to the mounting hole 551 of the mounting frame 55 and is located on the inner side of the piezoelectric module 30. The first functional device 60 includes a propagation surface 601 facing away from the receiving space 101, and the propagation surface 601 is exposed relative to the surface of the mounting frame 55 facing away from the receiving space 101. The first functional device 60 can be a sensor and / or an LED light. For example, the sensor can be an electrocardiogram (ECG) sensor, a bioelectric impedance sensor, an optical blood oxygen sensor, a skin electrical activity sensor, a three-axis accelerometer, an altimeter, or an optical heart rate sensor. When the first functional device 60 is a sensor, the signal emitted by the sensor can be transmitted from the propagation surface 601 to the outside of the wearable device 100. When the first functional device 60 is a light source, the light emitted by the light source can be transmitted from the propagation surface 601 to the outside of the wearable device 100.

[0102] The protective cover 70 can be mounted on the fourth surface 110 of the bottom shell 11 and can cover the receiving hole 114 of the bottom shell 11 and the transmission surface 601 of the first functional device 60. The protective cover 70 can be a transparent cover made of glass or plastic. The protective cover 70 can have high transparency, wear resistance, corrosion resistance, and other properties. The protective cover 70 can protect the first functional device 60 of the wearable device 100 from being impacted by foreign objects, or from being affected by moisture, dust, etc.

[0103] Referring again to Figure 6 , the two driver modules 50 are a first driver module 51 and a second driver module 52. The first driver module 51 can be located on the side of the piezoelectric module 30 that is closer to the second surface 32. For example, the first driver module 51 can be located on the side of the battery 40 that is away from the piezoelectric module 30. The first driver module 51 can be the main circuit board of the wearable device 100. In other embodiments, the first driver module 51 can be located between the battery 40 and the second surface 32 of the piezoelectric module 30.

[0104] The second driver module 52 is located on the side of the first driver module 51 facing the bottom housing 11. Exemplarily, the second driver module 52 can be located between the battery 40 and the first functional device 60, and on the inner side of the piezoelectric module 30. The second driver module 52 can be a sub-circuit board of the wearable device 100. The second driver module 52 can be electrically connected to both the first driver module 51 and the first functional device 60. The processor can send a signal to the first driver module 51, which can transmit the signal to the second driver module 52. The second driver module 52 can send the signal to the piezoelectric module 30 or the first functional device 60, thereby driving the piezoelectric module 30 or the first functional device 60 to operate.

[0105] In this embodiment, the inner side of the piezoelectric module 30 can provide a mounting location for other components of the wearable device 100 (such as the second driver module 52 and / or the first functional device 60). Therefore, the wearable device 100 can simultaneously deploy the piezoelectric module 30 and the first functional device 60 without interfering with each other. The signal emitted by the first functional device 60 can pass through the receiving hole 114 and the protective cover 70 and be emitted to the outside of the wearable device 100. The wearable device 100 can use the signal to identify the user's status or emit light to alert the user.

[0106] In this embodiment, the present application also explores the effect of the area of ​​the piezoelectric module 30 on the frequency response. For details, please refer to Figure 9. Figure 9 is a graph showing the frequency response of piezoelectric modules 30 of different areas as a function of frequency.

[0107] The two curves shown in FIG9 are a fourth curve 4 and a fifth curve 5. The fourth curve 4 is a frequency response curve for a piezoelectric module 30 having a thickness of 0.49 mm and a planar area of ​​30 mm by 15 mm. The fifth curve 5 is a frequency response curve for a piezoelectric module having a thickness of 0.49 mm and a planar area of ​​20 mm by 10 mm.

[0108] By comparing the fourth curve 4 and the fifth curve 5, we can compare the effect of the surface area on the frequency response of the piezoelectric module 30. As shown in Figure 9, the integrated area of ​​the fourth curve 4 is greater than the integrated area of ​​the fifth curve 5. The larger the integrated area of ​​the curve in Figure 9, the greater the sound energy of the piezoelectric module 30 corresponding to that curve. Therefore, it can be seen that the sound emitted by the piezoelectric module 30 with a larger surface area is easier for the user to hear.

[0109] In a fourth possible embodiment, please refer to FIG. 2 and FIG. 10 . FIG. 10 is a schematic diagram of a partial structure of the wearable device 100 shown in FIG. 1 in the fourth embodiment.

[0110] The wearable device 100 shown in this embodiment differs from the wearable device 100 shown in the first embodiment described above in that the rear shell 10 is provided with a first limiting body 13. The first limiting body 13 is recessed with a first groove 131. The first limiting body 13 is connected to the surface of the rear shell 10 facing the interior of the wearable device 100. The first limiting body 13 can be connected to the edge areas of the side shell 12 and the bottom shell 11 of the rear shell 10. The opening of the first groove 131 is located on the surface of the first limiting body 13 facing away from the rear shell 10.

[0111] There may be a gap between the piezoelectric module 30 and the first limiting body 13. That is, the piezoelectric module 30 does not overlap with the first limiting body 13. The shape of the piezoelectric module 30 may be a bow or approximately a bow. It should be noted that the bow is a figure composed of a chord and its corresponding arc. When the arc of the bow is smaller than a semicircle, it is called a "minor arc bow". When the arc of the bow is larger than a semicircle, it is called a "major arc bow". In the embodiment of the present application, the shape of the piezoelectric module 30 may be a "major arc bow" as shown in Figure 10. Alternatively, the shape of the piezoelectric module 30 may also be a "minor arc bow". The straight edge of the piezoelectric module 30 may face the first limiting body 13, and there is a gap between it and the first limiting body 13.

[0112] The wearable device 100 also includes a second functional component 80. The second functional component 80 is connected to the first limiting body 13. The second functional component 80 is located in the first groove 131. The second functional component 80 can be electrically connected to the driving module 50. The second functional component 80 can be a vibrator 81. The vibrator 81 can be a device that can generate a vibration effect on the wearable device 100, for example, a motor.

[0113] In this embodiment, the vibrating member 81 can vibrate simultaneously with the piezoelectric module 30 , thereby making the vibration effect of the wearable device 100 more obvious.

[0114] In addition, a gap is provided between the piezoelectric module 30 and the first limiting body 13 to prevent the first limiting body 13 from hindering the vibration of the piezoelectric module 30 and affecting the vibration and sound effects of the piezoelectric module 30, thereby ensuring the normal operation of the piezoelectric module 30.

[0115] In a fifth possible embodiment, please refer to FIG. 2 and FIG. 11 . FIG. 11 is a schematic diagram of a partial structure of the wearable device 100 shown in FIG. 1 in the fifth embodiment.

[0116] The wearable device 100 shown in this embodiment differs from the wearable device 100 shown in the fourth embodiment described above in that the side shell of the rear shell can be provided with a sound hole (not shown). The sound hole is connected to the first groove 131. The second functional component 80 is a sound-emitting element 82. The sound waves emitted by the sound-emitting element 82 can be transmitted to the outside through the sound hole.

[0117] In this embodiment, the sound emitting member 82 can emit sound simultaneously with the piezoelectric module 30 , thereby increasing the loudness of the sound emitted by the wearable device 100 .

[0118] In a sixth possible embodiment, please refer to FIG12 , which is a schematic diagram of a partial structure of the wearable device 100 shown in FIG1 in the sixth embodiment.

[0119] The wearable device 100 shown in this embodiment differs from the wearable device 100 shown in the third embodiment described above in that the rear shell 10 is provided with a first limiting body 13. The first limiting body 13 is recessed with a first groove 131. The first limiting body 13 is connected to the surface of the rear shell 10 facing the interior of the wearable device 100. The first limiting body 13 can be connected to the edge areas of the side shell 12 and the bottom shell 11 of the rear shell 10. The opening of the first groove 131 is located on the surface of the first limiting body 13 facing away from the rear shell 10.

[0120] The piezoelectric module 30 may include a first portion 33 and a second portion 34. The second portion 34 is connected to both ends of the arc of the first portion 33 to form a ring-shaped piezoelectric module 30. The outer side of the second portion 34 may be a straight edge.

[0121] The second portion 34 may be disposed toward the first limiting body 13. The straight side of the second portion 34 faces the first limiting body 13, and there is a gap between the second portion 34 and the first limiting body 13. The first portion 33 is bent in a direction away from the first limiting body 13.

[0122] The first portion 33 and the second portion 34 of the piezoelectric module 30 may be disposed together to surround the first functional device 60 . In other words, the first functional device 60 is located inside the piezoelectric module 30 .

[0123] The wearable device 100 further includes a second functional component 80. The second functional component 80 is connected to the first limiting body 13. The second functional component 80 is located in the first groove 131. The second functional component 80 can be electrically connected to the first driving module 51. The second functional component 80 can be a speaker or a motor.

[0124] In this embodiment, the edge of the second part 34 of the piezoelectric module 30 can avoid the second functional device 80, so that the wearable device 100 can be equipped with the piezoelectric module 30 and the second functional device 80 at the same time without interference. And the middle part of the piezoelectric module 30 can provide an installation position for other components of the wearable device 100 (such as the second driving module 52 and the first functional device 60), so that the wearable device 100 can be equipped with the piezoelectric module 30 and the first functional device 60 at the same time without interference. Therefore, the wearable device 100 has the sensor function or light-emitting function of the first functional device 60, the sound or vibration function of the second functional device 80, and the vibration function and sound-generating function of the piezoelectric module 30. This embodiment can provide users with more reminder methods by increasing the functions of the wearable device 100.

[0125] In a seventh possible embodiment, please refer to FIG13 , which is a schematic diagram of a partial structure of the wearable device 100 shown in FIG1 in the seventh embodiment.

[0126] The wearable device 100 shown in this embodiment is different from the wearable device 100 shown in the fourth embodiment described above in that the rear shell 10 may also be provided with a second limiting body 14. The structure of the second limiting body 14 may be similar to the first limiting body 13 described above. The second limiting body 14 is recessed with a second groove 141. The second limiting body 14 is connected to the inner surface of the rear shell 10. Exemplarily, the second limiting body 14 may be connected to the edge areas of the side shell 12 and the bottom shell 11 of the rear shell 10. The opening of the second groove 141 is located on the side surface of the second limiting body 14 facing away from the rear shell 10.

[0127] The first limiter 13 and the second limiter 14 are both located at the edge of the rear shell 10. The first limiter 13 and the second limiter 14 are respectively located at opposite ends of the rear shell 10 along the width direction. The width direction of the rear shell 10 can be the extension direction of any diameter of the circular bottom shell 11.

[0128] The piezoelectric module 30 may be shaped like a rounded rectangle or a similar rounded rectangle. The piezoelectric module 30 includes a first side 301 and a second side 302 disposed opposite each other along its width. Both the first side 301 and the second side 302 may be straight sides. The first side 301 faces the first position limiting body 13. A gap may exist between the first side 301 and the first position limiting body 13. The second side 302 faces the second position limiting body 14. A gap may exist between the second side 302 and the second position limiting body 14.

[0129] The wearable device 100 further includes two second functional components 80. The two second functional components 80 may be a vibrating component 81 and a sounding component 82. The vibrating component 81 is connected to the first limiting body 13. The sounding component 82 is connected to the second limiting body 14.

[0130] In this embodiment, the wearable device 100 can be provided with a vibrating member 81, a sound-generating member 82 and a piezoelectric module 30 at the same time. The vibrating member 81 can vibrate simultaneously with the piezoelectric module 30, thereby making the vibration effect of the wearable device 100 more obvious and providing the user with a clearer vibration feeling. And because the vibration mode of the vibrating member 81 and the piezoelectric module 30 are different, the vibration sense provided by the vibrating member 81 and the piezoelectric module 30 are also different. The wearable device 100 can provide three types of vibration senses, namely, the vibration sense generated by the vibration of the vibrating member 81, the vibration sense generated by the vibration of the piezoelectric module 30, and the vibration sense generated by the simultaneous vibration of the vibrating member 81 and the piezoelectric module 30. The user can set different vibration senses for different usage scenarios. The sound-generating member 82 can make a sound simultaneously with the piezoelectric module 30, thereby making the sound emitted by the wearable device 100 louder.

[0131] In addition, by providing a gap between the piezoelectric module 30 and the first limiter 13 and the second limiter 14, the first limiter 13 and the second limiter 14 can prevent the vibration of the piezoelectric module 30 from being hindered, and the vibration and sound effects of the piezoelectric module 30 from being affected, thereby ensuring the normal operation of the piezoelectric module 30.

[0132] In an eighth possible embodiment, please refer to FIG. 6 and FIG. 14 . FIG. 14 is a schematic diagram of a partial structure of the wearable device 100 shown in FIG. 1 in the eighth embodiment.

[0133] The wearable device 100 shown in this embodiment differs from the wearable device 100 shown in the sixth embodiment described above in that the rear shell 10 may further be provided with a second position-limiting body 14. The second position-limiting body 14 is recessed with a second groove 141. The second position-limiting body 14 may be connected to the edge areas of the side shell 12 and the bottom shell 11 of the rear shell 10. The opening of the second groove 141 is located on a side surface of the second position-limiting body 14 facing away from the rear shell 10. The second position-limiting body 14 and the first position-limiting body 13 are respectively located at opposite ends of the rear shell 10 along the width direction.

[0134] The piezoelectric module 30 may be frame-shaped. The outer edge of the piezoelectric module 30 includes a first side 301 and a second side 302 disposed opposite each other along its width. Both the first side 301 and the second side 302 may be straight edges. The first side 301 faces the first position limiter 13. A gap may exist between the first side 301 and the first position limiter 13. The second side 302 faces the second position limiter 14. A gap may exist between the second side 302 and the second position limiter 14.

[0135] The wearable device 100 is provided with two second functional components 80. The two second functional components 80 can be a vibrating component 81 and a sounding component 82. The vibrating component 81 is connected to the first limiting body 13. The sounding component 82 is connected to the second limiting body 14.

[0136] In this embodiment, the wearable device 100 can be provided with a vibrating element 81, a sound-emitting element 82, a first functional device 60 and a piezoelectric module 30 at the same time, so that the wearable device 100 can simultaneously have functions such as sound generation, vibration, sensing the outside world or providing light source, so as to facilitate users to use it in more scenarios.

[0137] In a ninth possible embodiment, please refer to Figure 15 , which is a schematic diagram of a portion of the structure of the wearable device 100 shown in Figure 1 , according to the ninth embodiment. Unlike the eighth possible embodiment, the first position-limiting body 13 and the second position-limiting body 14 can be positioned adjacent to each other. The piezoelectric module can be annular and have a notch 304 disposed therein. The notch 304 faces the first position-limiting body 13 and the second position-limiting body 14.

[0138] In this embodiment, the notch 304 of the piezoelectric module 30 can avoid the first limiting body 13 and the second limiting body 14 at the same time, thereby preventing the piezoelectric module 30 from interfering with the first limiting body 13 and the second limiting body 14 .

[0139] In other possible embodiments, please refer to FIG16 , which is another exploded schematic diagram of the wearable device 100 shown in FIG1 . The wearable device 100 may further include a reinforcement housing 90 and a connector 91 . The reinforcement housing 90 includes a bottom plate 92 , side plates 93 , and a first extension plate 94 .

[0140] The side plate 93 is fixedly connected to one side of the bottom plate 92 and is disposed around the bottom plate 92. The side plate 93 and the bottom plate 92 enclose a storage space. The first extension plate 94 is fixedly connected to the peripheral edge of the side plate 93 facing away from the bottom plate 92 and is disposed around the side plate 93. The first extension plate 94 extends toward a side away from the storage space 101. The first extension plate 94 is provided with four first connection holes 95. The first connection holes 95 penetrate the first extension plate 94 along the thickness direction of the first extension plate 94. The four first connection holes 95 are spaced apart along the circumference of the first extension plate 94.

[0141] The rear housing 10 also includes a second extension plate 15, which is fixedly connected to the periphery of the side housing 12 facing away from the bottom housing 11. The second extension plate 15 is disposed around the side housing 12. The second extension plate 15 extends toward a side away from the receiving space 101. The second extension plate 15 is provided with four second connection holes 151. The second connection holes 151 extend through the second extension plate 15 along its thickness. The four second connection holes 151 are spaced apart along the circumference of the second extension plate 15.

[0142] The reinforced housing 90 is connected to the side of the rear housing 10 facing away from the top cover 20. The first connection hole 95 of the reinforced housing 90 corresponds to the second connection hole 151 of the rear housing. The first connection hole 95 and the second connection hole 151 are connected. The connector 91 can pass through the first connection hole 95 and the second connection hole 151, thereby connecting the reinforced housing 90 and the rear housing 10 together. The reinforced housing 90 can increase the structural strength of the wearable device 100, making the wearable device 100 more impact-resistant.

[0143] In addition, the reinforced housing 90 increases the thickness of the wearable device 100. When the piezoelectric module 30 drives the rear housing 10 to vibrate, the vibration of the rear housing 10 is transmitted to the reinforced housing 90, and then the vibration can be felt by the user.

[0144] Next, the present application also explores the relationship between the load and frequency response of the piezoelectric module 30 .

[0145] Please refer to Figure 17, which is a graph showing the frequency response of the piezoelectric module 30 under different loads as a function of frequency. In an embodiment of the present application, the piezoelectric module 30 is connected to an attached accessory. The attached accessory includes a substrate and a load connected to the substrate. The weight of the attached accessory is adjusted by adjusting the number of loads. The curves shown in Figure 17 are the sixth curve 6 and the seventh curve 7. The sixth curve 6 is a frequency response curve when the piezoelectric module 30 is connected to an attached accessory that does not include a load. The seventh curve 7 is a frequency response curve when the piezoelectric module 30 is connected to an attached accessory that includes two loads.

[0146] It can be seen that the integrated area of ​​the sixth curve 6 is greater than the integrated area of ​​the seventh curve 7. In FIG17 , a larger integrated area of ​​a curve indicates a greater sound energy of the piezoelectric module 30 corresponding to that curve. Therefore, it can be seen that the sound emitted by a piezoelectric module 30 with less load is easier for the user to hear.

[0147] It should be noted that the wearable device 100 described above is described using a round watch as an example. Please refer to Figure 18, which is a partial structural diagram of another wearable device 100 provided in an embodiment of the present application. In other embodiments of the present application, the wearable device 100 can also be a square watch, and the watch can include any one, several or all of the components described above. The shape and arrangement of the components inside the square watch can be adapted to the installation space of the square watch. For example, the two second functional components 80 (vibrating component 81 and sounding component 82) can be located on both sides of the width direction of the rear shell 10. The piezoelectric module 30 can be in the shape of a square frame. A first functional component 60 can be provided inside the piezoelectric module 30. In other possible embodiments of the present application, the wearable device 100 can also be a watch of other common shapes.

[0148] Please refer to Figure 19, which is a flow chart of the working method of the wearable device 100 shown in Figure 1. The present application also provides a driving method of the wearable device 100. It is applied to the wearable device 100 described above. Among them, the specific structure of the wearable device 100 can refer to Figures 1 to 18 and the above description. Regarding the improvements of the wearable device 100, if there is no conflict, they can all be used in the description of the wearable device 100 above. The working method of the wearable device 100 includes:

[0149] S100: The processor sends a first signal.

[0150] The first signal may be a vibration waveform or a sound waveform, and the vibration waveform and the sound waveform have different amplitudes and frequencies.

[0151] S200: The driving module 50 receives the first signal and sends a second signal.

[0152] Specifically, the driver module 50 receives the first signal sent by the processor and can process the first signal sent by the processor. For example, the driver module 50 can amplify the first signal sent by the processor, or the driver module 50 can control the amplitude and waveform of the first signal sent by the processor. The second signal is the first signal processed by the driver module 50.

[0153] S300: The piezoelectric module 30 vibrates upon receiving the second signal, driving the rear housing 10 to vibrate. The vibration frequency of the piezoelectric module 30 is the same as the waveform frequency of the second signal. The vibration amplitude of the piezoelectric module 30 is positively correlated with the waveform amplitude of the second signal.

[0154] The above is an exemplary embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made thereto without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A wearable device, characterized in that: It includes a rear shell, a piezoelectric module and a driving module. The piezoelectric module is arranged on the inner surface of the rear shell. The driving module is electrically connected to the piezoelectric module. The driving module is used to drive the piezoelectric module to vibrate, so that the vibration of the piezoelectric module drives the vibration of the rear shell.

2. The wearable device according to claim 1, characterized in that: The piezoelectric module is attached to the inner surface of the rear shell.

3. The wearable device according to claim 1 or 2, characterized in that: The shape of the piezoelectric module is one of frame, rectangle, circle, sector or sector ring.

4. The wearable device according to claim 3, characterized in that: The wearable device also includes a first functional device. The piezoelectric module is in a frame shape. The first functional device is located inside the piezoelectric module.

5. The wearable device according to claim 1 or 2, characterized in that: The wearable device includes a second functional device, which is arranged in an edge area of ​​the rear shell, and the second functional device includes a sound-emitting component and / or a vibration component, and the second functional device does not overlap with the piezoelectric module.

6. The wearable device according to claim 4, characterized in that: The wearable device also includes a battery, the piezoelectric module includes a first surface and a second surface, the first surface and the second surface are arranged back to back, the first surface faces the rear shell, the battery is located on one side of the second surface of the piezoelectric module, and there is a gap between the battery and the second surface of the piezoelectric module.

7. The wearable device according to claim 6, characterized in that: The driving module is located between the second surface and the battery, with a gap between the driving module and the second surface, or the driving module is located on a side of the battery away from the piezoelectric module.

8. The wearable device according to claim 6, characterized in that: There are two driving modules, which are respectively a first driving module and a second driving module. The first driving module is located on a side of the battery away from the piezoelectric module, and the second driving module is located on a side of the battery facing the piezoelectric module. The second driving module is electrically connected to the first driving module, and the second driving module is electrically connected to the piezoelectric module.

9. The wearable device according to claim 8, characterized in that: The rear shell is provided with a receiving hole, and the receiving hole passes through the rear shell. The wearable device also includes a mounting frame, and the mounting frame is installed in the receiving hole. The mounting frame is located on a side of the second driving module away from the battery, and the first functional device is connected to the mounting frame.

10. The wearable device according to claim 9, characterized in that: The wearable device also includes a protective cover, which is connected to the outer surface of the rear shell and covers the accommodating hole.

11. The wearable device according to claim 1 or 2, characterized in that: The wearable device also includes a fixing strap, which is connected to the rear shell and is used for being worn by a user.

12. An electronic device, characterized in that: The electronic device includes a back shell, a piezoelectric module, a driving module and a processor. The piezoelectric module is arranged on the inner surface of the back shell, the processor is electrically connected to the driving module, and the driving module is electrically connected to the piezoelectric module. The processor controls the driving module to drive the piezoelectric module to vibrate, so that the vibration of the piezoelectric module drives the back shell to vibrate.

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