Patent Description:
At present, smartwatches have been widely used. In practical applications of smartwatches, to better improve the experience of human-computer interaction, a touch display screen is usually integrated on a smartwatch.

However, in practice, it is found that when a user directly operates the touch display screen with a finger, part of the display region of the touch display screen is easily blocked by the finger due to a small size of the touch display screen. As a result, the user cannot visually view the blocked part of the display region. For example, the first operation of using the smartwatch is an unlocking operation. When the user performs the unlocking operation on the touch display screen with a finger, part of the display region is easily blocked by the finger due to the small size of the touch display screen, often causing unlocking errors, requiring multiple inputs, resulting in complex operations, or easily exposing the user's privacy if the screen lock is not set.

<CIT> discloses a body-wearable electronic device that includes a case, a display panel, a rotating bezel, and a band. The rotating bezel and the display panel, arranged inside the rotating bezel for displaying either a time display screen for displaying the time or a game display screen comprising both a main image, which is the main object of operation in games, and a background image. When the game display screen is displayed on the display panel, the display of the main image is controlled, according to the amount of operation of the rotating bezel.

<CIT> discloses a rotary input device and electronic device adopting the same. The rotary input device includes a bezel portion and one or more switch units.

According to a first aspect, an embodiment of the present invention provides an electronic device, which is defined in claim <NUM>.

According to a second aspect, an embodiment of the present invention further provides a control method for the foregoing electronic device, which is defined in claim <NUM>.

According to a third aspect, an embodiment of the present invention further provides a computer-readable storage medium, which is defined in claim <NUM>.

According to a fourth aspect, an embodiment of the present invention further provides a computer program product stored in a computer-readable storage medium, where when the computer program product is executed by at least one processor, the steps of the foregoing control method for the foregoing electronic device are implemented.

According to a fifth aspect, an embodiment of the present invention further provides an apparatus configured to perform the steps of the foregoing control method for the foregoing electronic device.

To describe the technical solutions of the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

In order to make the technical problems to be resolved, technical solutions, and advantages of the present invention clearer, the following will give a detailed description with reference to the accompanying drawings and specific embodiments.

As shown in <FIG> and <FIG>, an electronic device according to embodiments of the present invention includes:.

In the case that the bezel <NUM> is located at a first position of the groove <NUM>, the first electrode <NUM> and the second electrode <NUM> are conductively connected; and in the case that the bezel <NUM> is located at a second position of the groove <NUM>, the first electrode <NUM> and the second electrode <NUM> are conductively disconnected.

In this way, the user can adjust the position of the bezel <NUM> in the electronic device, so that when the bezel <NUM> is located at the first position of the groove <NUM>, the first electrode <NUM> and the second electrode <NUM> on the bottom surface of the groove <NUM> are conductively connected; and when the bezel <NUM> is located at the second position of the groove <NUM> the first electrode <NUM> and the second electrode <NUM> are conductively disconnected. In this way, the electronic device can implement corresponding functions by detecting the connection state of conductive connection or conductive disconnection of the first electrode <NUM> and the second electrode <NUM>, avoiding the problem of inconvenient operation caused by the operation on the display screen of the electronic device.

After detecting the connection state of the first electrode and the second electrode, specifically, according to a first preset parameter, in the case that the connection state is conductive connection, the electronic device may be turned off or turned on; or in the case that the connection state is conductive disconnection, a target object is selected. Certainly, based on the connection state, the electronic device can further implement other functions, which are not listed one by one herein.

In this embodiment, the electronic device further includes:.

In this way, when the bezel <NUM> is located at the first position, the protruding portion of the bezel <NUM> close to the bottom surface of the groove <NUM> presses the elastic member <NUM> to connect the elastic member <NUM> to the second electrode <NUM>, thereby conductively connecting the first electrode <NUM> and the second electrode <NUM>; and when the bezel <NUM> is located at the second position, as shown in <FIG>, the protruding portion is away from the elastic member <NUM>, and the elastic member <NUM> may return to its original state after being released from the pressing, and is separated from the second electrode <NUM>, thereby disconnecting the first electrode <NUM> and the second electrode <NUM>.

Optionally, the electronic device further includes: a display screen <NUM> disposed in the accommodating space, where the bezel <NUM> has a first limit surface clamped to the housing <NUM> and a second limit surface clamped to the display screen <NUM> that are disposed on a side of the bezel away from the bottom surface.

In <FIG>, the second limit surface is clamped to the display screen <NUM>, so that the bezel <NUM> is at the second position. In this case, the first limit surface is separated from the housing <NUM>. Certainly, pressing the bezel <NUM> downward may separate the second limit surface from a dial <NUM>, the first limit surface is clamped to the housing <NUM>, and the bezel <NUM> is at the first position.

It should be known that, in this embodiment, optionally, the first electrode <NUM> and the second electrode <NUM> are disposed on the bottom surface through a supporting plate <NUM>.

As shown in <FIG>, the housing <NUM> is provided with a groove <NUM>, and the groove <NUM> is an annular groove. Therefore, the first electrode <NUM> and the second electrode <NUM> are also annular electrodes, but have different radii. The first electrode <NUM> and the second electrode <NUM> are fixed in the supporting plate <NUM> and are disposed on the bottom surface of the groove <NUM> through the supporting plate <NUM>.

Optionally, the elastic member <NUM> is a press elastic piece.

In this case, the elastic member <NUM> of the press elastic piece is shown in <FIG> and <FIG>. An inner edge is fixedly connected to the first electrode <NUM>, an outer edge is fixedly connected to the supporting plate <NUM>, and a central raised position is just above the second electrode <NUM> and corresponds to the protruding portion of the bezel <NUM>. The protruding portion of the bezel <NUM> presses the press elastic piece, and the press elastic piece is deformed and connected to the second electrode <NUM> to conductively connect the first electrode <NUM> and the second electrode <NUM>.

Certainly, the first electrode <NUM> may also be two annular electrodes with different radii, respectively connected to edge portions on both sides of the elastic member <NUM>.

In addition, in this embodiment, as shown in <FIG> and <FIG>, optionally, a first dielectric <NUM> and a second dielectric <NUM> are disposed on a sidewall of the groove <NUM>.

The bezel <NUM> can rotate around an axial direction of the housing <NUM> in the groove <NUM>.

In this way, the user can adjust an electrical signal between the first dielectric <NUM> and the second dielectric <NUM> by rotating the bezel <NUM>, so that the electronic device can implement the corresponding functions by detecting the electrical signal, further avoiding the problem of inconvenient operation caused by the operation on the display screen of the electronic device.

Optionally, the first dielectric <NUM> and the second dielectric <NUM> are electrodes disposed at intervals on the same sidewall of the groove <NUM>, and a resistor <NUM> is disposed on a portion of the bezel <NUM> located in the groove <NUM>.

A first electrode bump <NUM> disposed on the first dielectric <NUM> can be in contact with the bezel <NUM>, and a second electrode bump <NUM> disposed on the resistor <NUM> can be in contact with the second dielectric <NUM>.

Preferably, the first dielectric <NUM> is an annular conductor sleeved on an inner wall of the groove <NUM> and has a fixed position. The first electrode bump <NUM> on the first dielectric <NUM> can come into contact with the resistor <NUM> disposed on the bezel <NUM>. The second dielectric <NUM> is an annular conductor sleeved on the inner wall of the groove <NUM> and has a fixed position. Certainly, the first dielectric <NUM> and the second dielectric <NUM> are located at different positions on the inner wall. The resistor <NUM> is an annular conductor provided with a notch and has a large resistance value. The resistor <NUM> is sleeved on the inner wall of the part of the bezel <NUM> located in the groove <NUM> and has a fixed position relative to the bezel <NUM>. The second electrode bump <NUM> on the resistor <NUM> can come into contact with the second dielectric <NUM>. Certainly, in order to facilitate the rotation of the bezel <NUM>, there is a predetermined amount of interference between the first electrode bump <NUM> and the resistor <NUM>, and there is a predetermined amount of interference between the second electrode bump <NUM> and the second dielectric <NUM>.

In this way, when the bezel <NUM> rotates, the resistor <NUM> rotates with the bezel <NUM>, and the second electrode bump <NUM> moves on the second dielectric <NUM>. As shown in <FIG>, the first electrode bump <NUM> on the first dielectric <NUM> is in contact with the resistor <NUM>. As shown in <FIG>, the second electrode bump <NUM> on the resistor <NUM> is in contact with the second dielectric <NUM>. In this way, relative positions of the first dielectric <NUM> and the second dielectric <NUM> change, and a resistance value between the first dielectric <NUM> and the second dielectric <NUM> changes with relative positions of the electrode bumps. The resistance value between the first dielectric <NUM> and the second dielectric <NUM> is a resistance value of the resistor chip between the first electrode bump <NUM> and the second electrode bump <NUM> (assuming that the resistor <NUM> has a large resistance value, a contact resistance value between the first electrode bump <NUM> and the resistor <NUM>, a contact resistance value between the second electrode bump <NUM> and the second dielectric <NUM>, and a resistance value of the second dielectric <NUM>, and the like may not be considered).

As shown in <FIG>, an effective resistance region <NUM> of the resistor <NUM> is the dashed box part in the figure. In this case, a corresponding length of the effective resistance region <NUM> is a distance between the relative positions of the first dielectric <NUM> and the second dielectric <NUM>, that is, an arc length L. Given that a resistivity per unit length of the resistor is r (a cross-sectional area of the resistor <NUM> is fixed), the relationship between L and the resistance value R between the first dielectric <NUM> and the second dielectric <NUM> may be obtained as R=r×L. Therefore, as L changes, R also changes, and there are different electrical signals between the first dielectric <NUM> and the second dielectric <NUM>. Further, by detecting the electrical signal, the electronic device can determine a target parameter corresponding to the current electrical signal and parameter configuration information according to a second preset parameter, and adjust the target parameter of the electronic device based on the determined parameter configuration information. For example, if the second preset parameter corresponds to adjusting the volume by rotating, according to the detected electrical signal, the target value of the volume corresponding to the current electrical signal can be determined, and then the volume is adjusted to the target value.

In this embodiment, the second preset parameter may further correspond to adjusting the brightness by rotating, selecting an application, and the like, which are not listed one by one herein.

To sum up, in the electronic device according to the embodiments of the present invention, on one hand, the position of the bezel <NUM> in the groove <NUM> can be adjusted, to conductively connect or conductively disconnect the first electrode <NUM> and the second electrode <NUM> on the bottom surface of the groove <NUM>; on the other hand, the bezel <NUM> can be rotated to adjust the electrical signal between the first dielectric <NUM> and the second dielectric <NUM>. In this way, the electronic device can implement the corresponding functions by detecting the connection state of the first electrode <NUM> and the second electrode <NUM> and the electrical signal between the first dielectric <NUM> and the second dielectric <NUM>, avoiding the problem of inconvenient operation caused by the operation on the display screen of the electronic device.

<FIG> shows a control method for the foregoing electronic device according to an embodiment of the present invention, including:
Step <NUM>: Detect a connection state of the first electrode and the second electrode in the electronic device, the connection state including conductive connection and conductive disconnection.

In the foregoing embodiment, the bezel of the electronic device may be located at different positions of the groove, to conductively connect or conductively disconnect the first electrode and the second electrode on the bottom surface of the groove. Therefore, in this step, the connection state of the first electrode and the second electrode is detected first, to understand user needs, and then make targeted adjustments.

Step <NUM>: Adjust a state of the electronic device based on the detected connection state.

In this step, after the detection in step <NUM>, the state adjustment of the electronic device can be completed based on the detected connection state.

Through the foregoing steps <NUM> and <NUM>, in the electronic device according to the embodiments of the present invention, the connection state of the first electrode and the second electrode caused by a position change of the bezel inside the groove may be detected, to adaptively adjust the state of the electronic device to meet user needs.

Optionally, step <NUM> includes:
according to a first preset parameter, in the case that the connection state is conductive connection, turning off or turning on the electronic device; or in the case that the connection state is conductive disconnection, selecting a target object.

In this way, based on the first preset parameter, when it is detected that the connection state is conductive connection, the electronic device is turned off or turned on; or, the target object is selected. Herein, that the electronic device is specifically turned off or turned on is correspondingly processed based on whether it is currently on or off. The target object may be an object currently displayed or selected by frame selection.

In addition, it can be known from the foregoing embodiments of the electronic device that, in the electronic device, an electrical signal between the first dielectric and the second dielectric can be adjusted by rotating the bezel. Therefore, optionally, the method further includes:.

In this way, the electronic device in the embodiments of the present invention may detect the electrical signal triggered between the first dielectric and the second dielectric caused by the rotation of the bezel inside the groove, adaptively adjusting the state of the electronic device to meet user needs.

Optionally, the adjusting the state of the electronic device based on the detected electrical signal includes:
determining a target parameter corresponding to the current electrical signal and parameter configuration information according to a second preset parameter, and adjusting the target parameter based on the parameter configuration information. In this way, for the detected electrical signal, the electronic device can determine the target parameter corresponding to the current electrical signal and the parameter configuration information according to the second preset parameter, and adjust the target parameter of the electronic device based on the determined parameter configuration information.

Optionally, the second preset parameter includes at least one of the following:.

Therefore, through the second preset parameter, when the connection state is conductive disconnection, the target parameter can be adjusted by rotating the bezel, and the target parameter is: the volume of the electronic device and the brightness of the display screen. Certainly, the parameter configuration information of the target parameter (that is, the adjustment target value) can be obtained from a value corresponding to the electrical signal in the second preset parameter.

In this embodiment, the second preset parameter may also be used to select an application, select a contact, and the like by rotating, which is not described in detail herein.

To sum up, in the method according to the embodiments of the present invention, on one hand, the position of the bezel can be adjusted based on the structure of the electronic device, to conductively connect or conductively disconnect the first electrode and the second electrode on the bottom surface of the groove; on the other hand, the bezel can be rotated to adjust the electrical signal between the first dielectric and the second dielectric. Therefore, the electronic device can implement corresponding functions by detecting the connection state of the first electrode and the second electrode and the electrical signal between the first dielectric and the second dielectric, avoiding the problem of inconvenient operation caused by the operation on the display screen of the electronic device.

<FIG> is a schematic diagram of a hardware structure of an electronic device according to the embodiments of the present invention. The electronic device <NUM> includes, but is not limited to, components such as a radio frequency unit <NUM>, a network module <NUM>, an audio output unit <NUM>, an input unit <NUM>, a sensor <NUM>, a display unit <NUM>, a user input unit <NUM>, an interface unit <NUM>, a memory <NUM>, a processor <NUM>, and a power supply <NUM>. A person skilled in the art may understand that the structure of the electronic device shown in <FIG> constitutes no limitation on the electronic device, and the electronic device may include more or fewer components than those shown in the figure, or some components may be combined, or a different component deployment may be used. In the embodiments of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a handheld computer, an in-vehicle terminal, a wearable device, a pedometer, and the like.

The processor <NUM> is configured to detect a connection state of the first electrode and the second electrode in the electronic device, where the connection state includes conductive connection and conductive disconnection; and
to adjust a state of the electronic device based on the detected connection state.

It can be seen that the position of the bezel can be adjusted based on the structure of the electronic device, to conductively connect or conductively disconnect the first electrode and the second electrode on the bottom surface of the groove. Therefore, the electronic device can implement the corresponding functions by detecting the connection state of the first electrode and the second electrode, avoiding the problem of inconvenient operation caused by the operation on the display screen of the electronic device.

It should be understood that, in the embodiments of the present invention, the radio frequency unit <NUM> may be configured to receive and send a signal during an information receiving and sending process or a call process. Specifically, the radio frequency unit receives downlink data from a base station, then delivers the downlink data to the processor <NUM> for processing, and sends related uplink data to the base station. Generally, the radio frequency unit <NUM> includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit <NUM> may further communicate with another device through a wireless communication system and network.

The electronic device provides wireless broadband Internet access for a user by using the network module <NUM>, such as helping the user to send and receive emails, browse web pages, and access streaming media.

The audio output unit <NUM> may convert audio data received by the radio frequency unit <NUM> or the network module <NUM> or stored in the memory <NUM> into an audio signal and output the audio signal as sound. In addition, the audio output unit <NUM> may further provide an audio output related to a particular function executed by the electronic device <NUM> (for example, a call signal receiving sound or a message receiving sound). The audio output unit <NUM> includes a speaker, a buzzer, a receiver, and the like.

The input unit <NUM> is configured to receive an audio or video signal. The input unit <NUM> may include a graphics processing unit (Graphics Processing Unit, GPU) <NUM> and a microphone <NUM>. The graphics processing unit <NUM> performs processing on image data of a static picture or a video obtained by an image acquisition device (for example, a camera) in a video acquisition mode or an image acquisition mode. The processed image frame may be displayed on the display unit <NUM>. An image frame that has been processed by the graphics processing unit <NUM> may be stored in the memory <NUM> (or another storage medium) or sent by using the radio frequency unit <NUM> or the network module <NUM>. The microphone <NUM> can receive sounds and can process such sounds as audio data. The processed audio data may be converted, in a phone call mode, into a format output that can be sent by the radio frequency unit <NUM> to a mobile communication base station.

The electronic device <NUM> may further include at least one sensor <NUM>, such as an optical sensor, a motion sensor, and other sensors. Specifically, the optical sensor includes an ambient light sensor and a proximity sensor, where the ambient light sensor may adjust luminance of the display panel <NUM> according to the luminance of the ambient light, and the proximity sensor may switch off the display panel <NUM> and/or backlight when the electronic device <NUM> is moved to the ear. As one type of motion sensor, an accelerometer sensor may detect magnitudes of accelerations in various directions (generally, on three axes), may detect a magnitude and a direction of the gravity when static, and may be applied to recognizing the attitude of the electronic device (for example, switching between landscape orientation and portrait orientation, a related game, and magnetometer attitude calibration), a function related to vibration recognition (such as a pedometer and a knock), and the like; the sensor <NUM> may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which is not described in detail herein.

The display unit <NUM> is configured to display information inputted by the user or information provided for the user. The display unit <NUM> may include a display panel <NUM>. The display panel <NUM> may be configured by using a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input unit <NUM> may be configured to receive input digit or character information, and generate key signal input related to the user setting and function control of the electronic device. Specifically, the user input unit <NUM> includes a touch panel <NUM> and another input device <NUM>. The touch panel <NUM>, also referred to as a touchscreen, may collect a touch operation of a user on or near the touch panel (such as an operation of a user on the touch panel <NUM> or near the touch panel <NUM> by using any suitable object or attachment, such as a finger or a stylus). The touch panel <NUM> may include two parts: a touch detection apparatus and a touch controller. The touch detection apparatus detects a touch position of the user, detects a signal generated by the touch operation, and transfers the signal to the touch controller. The touch controller receives touch information from the touch detection apparatus, converts the touch information into touch point coordinates, and transmits the touch point coordinates to the processor <NUM>. In addition, the touch controller receives a command transmitted by the processor <NUM> and executes the command. In addition, the touch panel <NUM> may be implemented by using various types, such as a resistive type, a capacitive type, an infrared type, and a surface acoustic wave type. In addition to the touch panel <NUM>, the user input unit <NUM> may further include the another input device <NUM>. Specifically, the another input device <NUM> may include, but is not limited to, a physical keyboard, a functional key (such as a volume control key or a switch key), a track ball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel <NUM> may cover the display panel <NUM>. After detecting a touch operation on or near the touch panel, the touch panel <NUM> transfers the touch operation to the processor <NUM>, to determine a type of a touch event. Then, the processor <NUM> provides a corresponding visual output on the display panel <NUM> according to the type of the touch event. In <FIG>, the touch panel <NUM> and the display panel <NUM> are used as two separate parts to implement input and output functions of the electronic device. However, in some embodiments, the touch panel <NUM> and the display panel <NUM> may be integrated to implement the input and output functions of the electronic device, which is not specifically limited herein.

The interface unit <NUM> is an interface for connecting an external apparatus and the electronic device <NUM>. For example, the external apparatus may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting an apparatus with a recognition module, an audio input/output (I/O) port, a video I/O port, a headphone port, and the like. The interface unit <NUM> may be configured to receive an input (such as data information or electric power) from an external apparatus and transmit the received input to one or more elements in the electronic device <NUM> or may be configured to transmit data between the electronic device <NUM> and the external apparatus.

The memory <NUM> may be configured to store a software program and various data. The memory <NUM> may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (such as a sound playback function and an image display function), and the like; The data storage area may store data created according to the use of the mobile phone (such as audio data, phone book), and the like. In addition, the memory <NUM> may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory or another volatile solid-state storage device.

The processor <NUM> is a control center of the electronic device, and is connected to various parts of the electronic device by using various interfaces and lines. By running or executing the software program and/or module stored in the memory <NUM>, and invoking data stored in the memory <NUM>, the processor performs various functions and data processing of the electronic device, thereby performing overall monitoring on the electronic device. The processor <NUM> may include one or more processing units. Preferably, the processor <NUM> may integrate an application processor and a modem processor. The application processor mainly processes an operating system, a user interface, an application program, and the like. The modem processor mainly processes wireless communication. It may be understood that the foregoing modem processor may not be integrated into the processor <NUM>.

The electronic device <NUM> may further include the power supply <NUM> (such as a battery) for supplying power to the components. Preferably, the power supply <NUM> may be logically connected to the processor <NUM> by a power management system, thereby implementing functions such as charging, discharging, and power consumption management by using the power management system.

In addition, the electronic device <NUM> includes some unshown functional modules, which are not described in detail herein.

The embodiments of the present invention further provide a computer-readable storage medium, storing a computer program, where when the computer program is executed by a processor, the processes of the embodiment of the control method for the foregoing electronic device are implemented, thereby achieving the same technical effects. To avoid repetition, details are not described herein again. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk, an optical disc or the like.

It should be noted that the terms "include", "comprise", or any other variation thereof in this specification is intended to cover a non-exclusive inclusion, making a process, method, article or apparatus including a series of elements include not only those elements, but also other elements not expressly listed, or further elements inherent to such process, method, article or apparatus. Without more limitations, elements defined by the sentence "including one" does not exclude that there are still other same elements in the processes, methods, objects, or apparatuses.

Through the descriptions of the foregoing implementations, a person skilled in the art may clearly understand that the methods in the foregoing embodiments may be implemented by means of software and a necessary general hardware platform, and certainly, may also be implemented by hardware, but in many cases, the former manner is a better implementation. Based on such understanding, the technical solutions of the present invention or a part thereof that makes a contribution to the prior art may be essentially embodied in a form of a software product. The computer software product is stored in a storage medium (such as a ROM/RAM, a disk, and an optical disk), including several instructions to enable one terminal (which may be a mobile phone, a computer, a server, an air conditioner a network device, or the like) to perform the methods in the embodiments of the present invention.

Claim 1:
An electronic device comprising:
a housing (<NUM>) having an accommodating space, wherein the housing (<NUM>) is provided with a groove (<NUM>) around the accommodating space, and a first electrode (<NUM>) and a second electrode (<NUM>) are disposed on a bottom surface of the groove (<NUM>); and
a bezel (<NUM>), wherein at least a portion of the bezel (<NUM>) is disposed in the groove (<NUM>); in a case that the bezel (<NUM>) is located at a first position of the groove (<NUM>), the first electrode (<NUM>) and the second electrode (<NUM>) are conductively connected; and in a case that the bezel (<NUM>) is located at a second position of the groove (<NUM>), the first electrode (<NUM>) and the second electrode (<NUM>) are conductively disconnected;
characterized by further comprising:
an elastic member (<NUM>) disposed on the bottom surface, wherein one end of the elastic member (<NUM>) is connected to the first electrode (<NUM>), a protruding portion is disposed on a surface of the bezel (<NUM>) facing the bottom surface of the groove (<NUM>); in the case that the bezel (<NUM>) is located at the first position, the protruding portion presses the elastic member (<NUM>), and another end of the elastic member (<NUM>) is connected to the second electrode (<NUM>); and in the case that the bezel (<NUM>) is located at the second position, the protruding portion is away from the elastic member (<NUM>), and the another end of the elastic member (<NUM>) is separated from the second electrode (<NUM>).