Side shoulder key structure and device for a metal middle frame

Abstract

The present invention discloses a side shoulder key structure and device for a metal middle frame. The structure comprises: a metal middle frame, a deep recess washed out on the metal middle frame, and a shallow recess washed out on the metal middle frame surrounding the deep recess. The deep recess and the shallow recess together form an annular recessed space. A flexible circuit sensor sheet is attached to the bottom of the recessed space, and injection molding is performed within the recessed space to form the side shoulder keys. The present invention can effectively improve the accuracy of detecting real key press events in a real hand sweat model environment. Through its simple design on the middle frame, it effectively improves the drawback of the self-capacitive C Touch IC, which has a high environmental requirement for detecting changes in the capacitance of a single electrode, thereby improving detection performance.

Description

Technical Field

[0001] The present invention relates to the field of mobile communications, and in particular to a side shoulder key structure and device of a metal middle frame. Background Art

[0002] In the prior art, with the continuous development of smart terminal devices, it is becoming more and more common to design buttons on the side of the middle frame of gaming phones. The design of shoulder buttons can enhance the interactive input experience during the game operation process and greatly improve the game operation effect. There are many ways to implement shoulder buttons on the market, including ultrasonic principle buttons, mechanical buttons, Wheatstone resistance bridge principle shoulder buttons, capacitive touch sensing principle shoulder buttons and other buttons with different technical principles. Different buttons have different technical advantages and disadvantages. Among them, capacitive touch shoulder buttons have the advantages of high sensitivity and fast response speed. However, the ability of capacitive touch to suppress hand sweat is weaker than other solutions. When users operate mobile phones for long-term games, their fingers sweat due to high ambient temperature or psychological tension of users. At this time, the performance of capacitive buttons in suppressing hand sweat is weak, and there is an urgent need for a solution to prevent accidental touch of capacitive touch shoulder buttons. Summary of the Invention

[0003] To address the aforementioned technical deficiencies in the prior art, the present invention proposes a side shoulder key structure and device for a metal middle frame. The structure comprises a metal middle frame, a deep recess washed out of the metal middle frame, and a shallow recess washed out of the metal middle frame surrounding the deep recess. The deep and shallow recesses together form an annular recessed space. A flexible circuit sensor sheet is attached to the bottom of the recessed space, and injection molding is performed within the recessed space to form the side shoulder keys.

[0004] Optionally, the flexible circuit sensor sheet is a copper sensor sheet, and the coverage area of the copper sensor sheet corresponds to the key area of the side shoulder key.

[0005] Optionally, the deep recess in the recessed space is filled with a first non-metallic material, and the shallow recess in the recessed space is filled with a second non-metallic material.

[0006] Optionally, when sweat exists on the side shoulder key, the capacitance C sweat on the side shoulder key is obtained.

[0007] Optionally, when there is sweat on the side shoulder keys and the sweat covers both the side shoulder keys and the metal middle frame, the capacitor Csweat=Cshoulder key sweat+Cmiddle frame sweat is determined.

[0008] Optionally, when there is no sweat on the side shoulder keys, the capacitance C finger on the side shoulder keys is obtained.

[0009] Optionally, when there is sweat on the side shoulder key and the sweat covers both the side shoulder key and the metal middle frame, it is determined that the capacitance Csweat is much greater than the capacitance Cfinger.

[0010] Optionally, the detection magnifications of sweat in the middle frame of the capacitor C and the finger of the capacitor C are determined, and the detection accuracy of the finger pressing event of the side shoulder key in the sweaty hand operation environment is determined based on the detection magnifications.

[0011] Optionally, when there is dirt on the side shoulder key, the dirt of the capacitor C on the side shoulder key is obtained; the detection magnification of the dirt in the middle frame of the capacitor C and the finger of the capacitor C is determined, and the detection accuracy of the finger pressing event of the side shoulder key in a dirty operation environment is determined based on the detection magnification.

[0012] The present invention also proposes a device comprising a side shoulder key structure of a metal middle frame as described in any one of the above items.

[0013] The side shoulder key structure and device structure of the metal middle frame embodying the present invention include a metal middle frame, a deep recess washed out on the metal middle frame, and a shallow recess washed out on the metal middle frame surrounding the deep recess. The deep recess and the shallow recess together form an annular recessed space. A flexible circuit sensor sheet is attached to the bottom of the recessed space, and injection molding is performed within the recessed space to form the side shoulder keys. The present invention can effectively improve the accuracy of detecting real key press events in a real hand sweat model environment. Through the simple design on the middle frame, it effectively improves the disadvantage of the self-capacitive C Touch IC's high environmental requirements for detecting the capacitance change of a single electrode itself, thereby improving detection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0015] Figure 1 This is a hardware structure diagram of a mobile terminal according to the present invention;

[0016] Figure 2 This is a diagram of a communication network system architecture provided by an embodiment of the present invention;

[0017] Figure 3 This is a first structural diagram of a first embodiment of the side shoulder key structure and device of a metal middle frame of the present invention;

[0018] Figure 4 This is a second structural diagram of a second embodiment of the side shoulder key structure and device of the metal middle frame of the present invention;

[0019] Figure 5 This is a third structural diagram of a second embodiment of the side shoulder key structure and device of the metal middle frame of the present invention;

[0020] Figure 6 is a fourth structural diagram of a second embodiment of the side shoulder key structure and device of the metal middle frame of the present invention;

[0021] Figure 7 This is the fifth structural diagram of the second embodiment of the side shoulder key structure and device of the metal middle frame of the present invention. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] In the subsequent description, suffixes such as "module," "component," or "unit" used to represent elements are only used to facilitate the description of the present invention and have no specific meaning. Therefore, "module," "component," or "unit" can be used interchangeably.

[0024] The terminal can be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0025] The following description will be made by taking a mobile terminal as an example. It will be understood by those skilled in the art that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present invention can also be applied to fixed type terminals.

[0026] See also Figure 1 , which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present invention. The mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will understand that Figure 1 The structure of the mobile terminal shown in the figure does not constitute a limitation to the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0027] The following combination Figure 1 A detailed introduction to the various components of the mobile terminal:

[0028] The RF unit 101 can be used to send and receive information or receive signals during calls. Specifically, it receives downlink information from the base station and transmits it to the processor 110 for processing. It also transmits uplink data to the base station. Typically, the RF unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and more. Furthermore, the RF unit 101 can communicate with the network and other devices via wireless communication. The above-mentioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing- Long Term Evolution) and TDD-LTE (Time Division Duplexing- Long Term Evolution), etc.

[0029] WiFi is a short-range wireless transmission technology. Mobile terminals can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 102. It provides users with wireless broadband Internet access. Figure 1 The WiFi module 102 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the invention.

[0030] The audio output unit 103 can convert audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, or the like.

[0031] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data from still images or videos captured by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the GPU 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the RF unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) in various operating modes, such as phone call mode, recording mode, and voice recognition mode, and process such sound into audio data. In phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 101. The microphone 1042 may implement various noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0032] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes) and the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as switching between horizontal and vertical screens, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they are not described here.

[0033] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0034] The user input unit 107 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can detect user touch operations on or near it (for example, operations performed on or near the touch panel 1071 using a finger, stylus, or any other suitable object or accessory) and drive corresponding connected devices according to pre-set programs. The touch panel 1071 may include a touch detection device and a touch controller. The touch detection device detects the user's touch position and detects signals generated by the touch operation, transmitting the signals to the touch controller. The touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 110. The touch controller can also receive and execute commands from the processor 110. Furthermore, the touch panel 1071 can be implemented using various types of sensors, including resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Specifically, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc., and are not specifically limited here.

[0035] Furthermore, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Subsequently, the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of touch event. Figure 1 In the embodiment, the touch panel 1071 and the display panel 1061 are two independent components to realize the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the mobile terminal, which is not limited here.

[0036] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device 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 a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0037] Memory 109 can be used to store software programs and various data. Memory 109 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of the phone (such as audio data and a phone book). Memory 109 may also include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state memory device.

[0038] Processor 110 is the control center of the mobile terminal, connecting all components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 109 and accessing data stored in memory 109, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, processor 110 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 110.

[0039] The mobile terminal 100 may further include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption.

[0040] although Figure 1 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0041] To facilitate understanding of the embodiments of the present invention, the communication network system on which the mobile terminal of the present invention is based is described below.

[0042] See also Figure 2 , Figure 2 A communication network system architecture diagram is provided for an embodiment of the present invention. The communication network system is an LTE system based on universal mobile communication technology. The LTE system includes a UE (User Equipment) 201, an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) 202, an Evolved Packet Core (EPC) 203, and an operator's IP service 204, which are sequentially connected in communication.

[0043] Specifically, UE201 may be the above-mentioned terminal 100, which will not be described in detail here.

[0044] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 , etc. Among them, eNodeB 2021 can be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface). eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 can provide UE 201 with access to EPC 203 .

[0045] The EPC 203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving GateWay) 2034, a PGW (PDN GateWay) 2035, and a PCRF (Policy and Charging Rules Function) 2036. The MME 2031 is the control node that processes signaling between the UE 201 and the EPC 203, providing bearer and connection management. The HSS 2032 provides registers for managing functions such as the Home Location Register (not shown) and stores user-specific information such as service features and data rates. All user data can be sent through SGW2034. PGW2035 can provide IP address allocation and other functions for UE 201. PCRF2036 is the policy and charging control policy decision point for service data flows and IP bearer resources. It selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0046] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services.

[0047] Although the above description is based on the LTE system as an example, those skilled in the art should know that the present invention is not only applicable to the LTE system, but also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems, and is not limited here.

[0048] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the method of the present invention are proposed.

[0049] Example 1

[0050] Figure 3 This is the first structural diagram of the side shoulder key structure of the metal middle frame of the present invention. As shown on the right side of the figure, the structure comprises: a metal middle frame 1, a deep recess 2 washed out of the metal middle frame 1, and a shallow recess 3 washed out of the metal middle frame 1 surrounding the deep recess 2. The deep recess 2 and the shallow recess 3 together form an annular recessed space. A flexible circuit sensor sheet 4 is attached to the bottom of the recessed space, and injection molding is performed within the recessed space to form the side shoulder key.

[0051] In this embodiment, Figure 3 Comparing the left and right sides, it can be seen that the difference between this embodiment and the existing design lies in the design of the shallow recess. Non-metallic material is filled in this area, thereby isolating the side shoulder keys from the metal middle frame.

[0052] The structural design of this embodiment includes a metal middle frame, a deep recess washed out on the metal middle frame, and a shallow recess washed out on the metal middle frame surrounding the deep recess. The deep and shallow recesses together form an annular recessed space. A flexible circuit sensor sheet is attached to the bottom of the recessed space, and injection molding is performed within the recessed space to form the side shoulder keys. This effectively improves the accuracy of detecting real key press events in a real hand sweat environment. The simple design on the middle frame effectively improves the disadvantage of the self-capacitive C Touch IC, which detects the capacitance change of a single electrode and has high environmental requirements, thereby improving detection performance.

[0053] Example 2

[0054] Figure 4 This is a flow chart of the second embodiment of the side shoulder key structure and device of the metal middle frame of the present invention. Based on the above embodiment, optionally, the flexible circuit sensor sheet is a copper sensor sheet, and the coverage area of the copper sensor sheet corresponds to the key area of the side shoulder key.

[0055] Optionally, the deep recessed portion in the recessed space is filled with a first non-metallic material, and the shallow recessed portion in the recessed space is filled with a second non-metallic material.

[0056] Optionally, when sweat exists on the side shoulder key, the capacitance C sweat on the side shoulder key is obtained.

[0057] Optionally, when there is sweat on the side shoulder keys and the sweat covers both the side shoulder keys and the metal middle frame, the capacitance Csweat=Cshoulder key sweat+Cmiddle frame sweat is determined.

[0058] Optionally, when there is no sweat on the side shoulder keys, the capacitance C finger on the side shoulder keys is obtained.

[0059] Optionally, when there is sweat on the side shoulder key and the sweat covers both the side shoulder key and the metal middle frame, it is determined that the capacitance Csweat is much greater than the capacitance Cfinger.

[0060] Optionally, the detection magnifications of sweat in the middle frame of the capacitor C and the finger of the capacitor C are determined, and the detection accuracy of the finger pressing event of the side shoulder key in the sweaty hand operation environment is determined based on the detection magnifications.

[0061] Optionally, when there is dirt on the side shoulder key, the dirt of the capacitor C on the side shoulder key is obtained; the detection magnification of the dirt in the middle frame of the capacitor C and the finger of the capacitor C is determined, and the detection accuracy of the finger pressing event of the side shoulder key in a dirty operation environment is determined based on the detection magnification.

[0062] Specifically, such as Figure 4 As shown, the electronic system architecture of a capacitive touch shoulder button includes the C_Touch chip, Touch-PADL (left shoulder button), and Touch-PADR (right shoulder button). The Touch-PADL (left shoulder button) and Touch-PADR (right shoulder button) form the Touch_PAD FPC (flexible circuit).

[0063] In this embodiment, if Figure 5 As shown, Touch_PAD FPC is a copper PAD implemented by a single-signal elliptical (rectangular) FPC. For the structure of the copper PAD, please refer to Figure 6 The length and width of the copper PAD are comparable to the PPS PAD (injection molded shoulder key panel) on the shoulder key surface. It is placed in the shoulder key PAD area on the inner side of the phone's middle frame and attached to the PPS. Figure 5 As shown, the PAD area is washed out on the metal middle frame by CNC, and PPS (black) is injected using injection molding to form a PPS button PAD; the inside of the PPS is hollowed out, and the above-mentioned FPC Touch PAD is attached to the inside of the PPS.

[0064] This embodiment uses a self-capacitive touch button IC solution. In principle, it uses a single electrode to detect changes in its own capacitance and transmit charge. A capacitive pad (FPC pad) connects to the Touch IC's excitation and sampling circuits to detect capacitance changes. The capacitance of the FPC pad depends on the sum of the capacitance between it and the system ground (C(gnd)) and the capacitance between the finger and the FPC pad (C(body)). When a finger touches the pad, the capacitance detected by the Touch IC is C = C(gnd) + C(body). When the finger lifts off the pad, the capacitance detected by the Touch IC is C = C(gnd). This allows capacitive buttons to detect and recognize when a finger is pressed and released. However, as described in the background technology, if a person sweats, sweat will remain on the PPS PAD. At this time, due to the presence of NaCl in human sweat and the presence of positive and negative ions, sweat is a good conductor. When sweat remains on the PAD, the capacitance detected by the Touch IC is C = C (gnd) + C (sweat). If the sweat residue on the PAD is large, the Touch IC cannot effectively distinguish between sweat residue and finger touch, which may cause problems such as key release or key triggering.

[0065] In this embodiment, please refer to Figure 7 By optimizing the structure of PAD design, the effect of sweat residue on the capacitance recognition detection of Touoch IC is reduced. For comparison, please refer to Figure 7 The left side shows the current PAD design, and the right side shows the design of this embodiment. Specifically, a hole in the shape and size of the PAD is CNC-printed in the side metal middle frame, and PPS material is injection-molded to form the PAD. In this solution, if sweat is present on the PAD and covers both the PPS and the metal portion of the middle frame, a capacitor, Csweat, is formed on the PAD. Csweat consists of two parts: C(sweat PAD) and C(sweat middle frame). Because the distance between the sweat and the middle frame is only the thickness of the anodic oxide film, which is extremely small (C = dielectric constant x [S / L]), a larger C(sweat middle frame) is formed. The sum of C(sweat PAD) + C(sweat middle frame) exceeds C(body), leading to misidentification of buttons.

[0066] In this embodiment, this patent designs an annular plastic area around the middle frame PPS button PAD. Optionally, a non-metallic material can be used as a substitute. For example, PPS in the same PAD area can be used, or non-metallic plastics of other colors or parameters can be used instead. This can reduce the distance between sweat and metal when sweat remains in this area, thereby effectively reducing the capacitance value of C (sweat middle frame) when sweat remains, thereby effectively improving the numerical multiplier (signal-to-noise ratio) of recognizing C (body) / C (sweat middle frame), and effectively improving the accuracy of detecting true key events in a real hand sweat model environment.

[0067] It can be seen that this embodiment improves the capacitance value (signal-to-noise ratio) of the shoulder key in a sweaty hand environment through the innovative design of the PPS area of the middle frame shoulder key, which can effectively improve the accuracy of detecting real key events in a real sweaty hand model environment.

[0068] Furthermore, this embodiment effectively improves the disadvantage of the self-capacitive C Touch IC that has a high requirement for a single environment by detecting the capacitance change of a single electrode itself through a simple design on the middle frame, thereby improving the detection performance.

[0069] Example 3

[0070] Based on the above embodiments, this embodiment further proposes a device, which includes a side shoulder key structure of a metal middle frame as described in any of the above items.

[0071] It should be noted that the above-mentioned device embodiment and structural embodiment belong to the same concept, and their specific implementation process is detailed in the structural embodiment, and the technical features in the structural embodiment are applicable to the device embodiment, which will not be repeated here.

[0072] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0073] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0074] Through the above description of the embodiments, those skilled in the art will clearly understand that the methods of the above embodiments can be implemented using software plus the necessary general-purpose hardware platform. Of course, hardware can also be used, but in many cases the former is the more preferred implementation method. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, or optical disk) and includes a number of instructions for enabling a terminal (such as a mobile phone, computer, server, air conditioner, or network device) to execute the methods described in the various embodiments of the present invention.

[0075] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A side shoulder key structure and device for a metal middle frame, characterized in that: The structure includes: a metal middle frame, a deep concave portion washed out on the metal middle frame, and a shallow concave portion washed out on the metal middle frame surrounding the deep concave portion, wherein the deep concave portion and the shallow concave portion together form an annular concave space, a flexible circuit sensor sheet is attached to the bottom of the concave space, and injection molding is performed in the concave space to form side shoulder keys; The deep concave portion in the concave space is filled with a first non-metallic material, and the shallow concave portion in the concave space is filled with a second non-metallic material; When sweat is present on the side shoulder key, obtaining a capacitance Csweat on the side shoulder key; When sweat is present on the side shoulder key and the sweat covers both the side shoulder key and the metal middle frame, the capacitance Csweat=Cshoulder key sweat+Cmiddle frame sweat is determined; When there is no sweat on the side shoulder key, obtaining the capacitance C finger on the side shoulder key; When sweat is present on the side shoulder key and the sweat covers both the side shoulder key and the metal middle frame, it is determined that the capacitance Csweat is much greater than the capacitance Cfinger; Determining a detection magnification of sweat on the capacitor C middle frame and a detection magnification of a finger on the capacitor C, and determining a detection accuracy rate of a finger press event on the side shoulder key in a sweaty hand operation environment based on the detection magnification; When dirt exists on the side shoulder key, obtaining the capacitance C dirt of the side shoulder key; The detection magnification of the dirt on the middle frame of the capacitor C and the finger on the capacitor C is determined, and the detection accuracy of the finger pressing event of the side shoulder key in the dirty operation environment is determined according to the detection magnification.

2. The side shoulder key structure of the metal middle frame according to claim 1, characterized in that: The flexible circuit sensor sheet is a copper sensor sheet, and the coverage area of the copper sensor sheet corresponds to the key area of the side shoulder key.

3. A device, characterized in that The device includes a side shoulder key structure of the metal middle frame as described in claim 1 or 2.

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