WO2024041111A1

WO2024041111A1 - Press key assembly, electronic device, control method, and computer storage medium

Info

Publication number: WO2024041111A1
Application number: PCT/CN2023/099707
Authority: WO
Inventors: 李玉财; 孙彬; 皮伟伟
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-08-25
Filing date: 2023-06-12
Publication date: 2024-02-29

Abstract

A press key assembly (40a), an electronic device (80), a control method, and a computer storage medium (90). The press key assembly (40a) comprises a press key (100), a magnetic member (500), a fixing member (200), and a Hall element (400); the magnetic member (500) is fixedly connected to the press key (100), and the Hall element (400) is fixedly disposed on the fixing member (200); the press key (100) can drive the magnetic member (500) to move in a first direction relative to the Hall element (400), thereby changing an induced magnetic field between the magnetic member (500) and the Hall element (400); the magnetizing direction of the magnetic member (500) is parallel to the first direction or the magnetic member (500) comprises a first magnetic member (510) and a second magnetic member (520) having opposite magnetizing directions, and the Hall element (400) can at least detect magnetic field changes in two directions. The press key assembly (40a) is provided with the Hall element (400) capable of detecting magnetic field changes in multiple directions, so that detection of magnetic induction intensity in conventional technical solutions is replaced with detection of a magnetic field direction, and the press key assembly has the characteristics of a strong anti-interference capability and saving layout space.

Description

Button assembly, electronic device, control method and computer storage medium

【Technical field】

The present application relates to the technical field of key position detection of electronic equipment, and specifically relates to a key assembly, electronic device, control method and computer storage medium that utilizes Hall elements to detect key position.

【Background technique】

In conventional technical solutions, the detection of the position of the three-stage side button is generally implemented by using a touch switch. The main problems with this solution are: too many devices are stacked, occupying a large amount of internal space in the electronic device, and the device is mechanically triggered for a long time. , short life and poor reliability.

[Content of the invention]

The first aspect of the embodiment of the present application provides a key assembly. The key assembly includes: a key, a magnetic part, a fixing part, and a Hall element; the magnetic part is fixedly connected to the key, and the Hall element is fixed On the fixed member; the button can drive the magnetic member to move in the first direction relative to the Hall element, thereby changing the induced magnetic field between the magnetic member and the Hall element; wherein, the The magnetizing direction of the magnetic component is parallel to the first direction or the magnetic component includes a first magnetic component and a second magnetic component with opposite magnetizing directions. The Hall element can detect changes in the magnetic field in at least two directions.

The second aspect of the embodiment of the present application provides an electronic device. The electronic device includes a housing, a control circuit board, and the key assembly described in any one of the above embodiments; the fixing member in the key assembly and the The housing is fixedly connected, and the control circuit board is electrically connected to the Hall element in the key assembly.

The third aspect of the embodiment of the present application provides a control method based on the electronic device described in the above embodiment. The control method includes:

Set the angle threshold of the Hall element in the key assembly;

Detect the current magnetic field angle value;

The corresponding function of the electronic device is triggered according to the corresponding relationship between the current magnetic field angle value and the angle threshold.

The fourth aspect of the embodiment of the present application provides an electronic device. The electronic device includes a processor and a memory. Program data is stored in the memory. The processor is used to execute the program data to implement the above embodiments. The control method described.

The fifth aspect of the embodiment of the present application provides a computer storage medium. Program data is stored in the computer storage medium. When the program data is executed by the processor, the program data is used to implement the steps described in the above embodiments. Control Method.

The key assembly provided by the embodiment of the present application is equipped with a Hall element that can detect changes in the magnetic field in multiple directions. It changes from detecting the magnetic induction intensity in the conventional technical solution to detecting the direction of the magnetic field. It has the characteristics of strong anti-interference ability and saving layout space.

[Picture description]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of an embodiment of the key assembly of the present application;

Figure 2 is an exploded schematic diagram of the structure of the key assembly in the embodiment of Figure 1;

Figure 3 is a schematic structural cross-sectional view of the key assembly along line A-A in the embodiment of Figure 1;

Figure 4 is a schematic structural cross-sectional view of the key assembly along line B-B in the embodiment of Figure 1;

Figure 5 is an exploded schematic diagram of the structure of the fixing part and the positioning part of the key assembly in the embodiment of Figure 1;

Figure 6 is a schematic structural diagram of the keys of the key assembly in the embodiment of Figure 1;

Figure 7 is a schematic structural diagram of the key assembly in the embodiment of Figure 1 in a mating state with the electronic device housing;

Figure 8 is a schematic structural cross-sectional view along line C-C in the embodiment of Figure 7;

Figure 9 is a structural schematic diagram showing the relative positional relationship between the magnetizing direction of the magnetic component and the Hall element in the embodiment of Figure 1;

Figure 10a is a schematic structural diagram of the first relative position state of the Hall element and the magnetic component in Figure 9;

Figure 10b is a schematic structural diagram of the second relative position state of the Hall element and the magnetic component in Figure 9;

Figure 10c is a schematic structural diagram of the third relative position state of the Hall element and the magnetic component in Figure 9;

Figure 11 is a schematic graph of the three-axis magnetic induction intensity value sensed by the Hall element in Figure 9;

Figure 12 is a graph of the angle change between the Y direction and the Z direction of the magnetic induction line sensed by the Hall element in Figure 9;

Figure 13 is a schematic structural cross-sectional view of another embodiment of the key assembly of the present application;

Figure 14 is a schematic diagram of the magnetization direction of the magnetic component in the embodiment of Figure 13;

Figure 15 is a schematic structural diagram of the matching position of the magnetic component and the Hall element in the embodiment of Figure 13;

Figure 16 is a schematic diagram of the magnetic field coordinate system of the magnetic component in the embodiment of Figure 13;

Figure 17 is a schematic curve diagram of the magnetic field in the three-axis direction detected by the Hall element in Figure 16;

Figure 18 is a schematic diagram of the magnetic field angle of the magnetic field simulation experiment of the magnetic part in Figure 16;

Figure 19 is a schematic diagram of the magnetic field cutting angle of the magnetic field simulation experiment when the magnetic component in Figure 16 has 1mT interference in the X and Z directions respectively;

Figure 20 is a schematic diagram of the percentage impact of 1mT interference on the magnetic field cutting angle;

Figure 21 is a schematic diagram of the overall structure of an embodiment of the electronic device of the present application;

Figure 22 is a schematic flowchart of an embodiment of the electronic device control method of the present application;

Figure 23 is a schematic flow chart of setting the angle threshold of the Hall element of the key assembly according to an embodiment;

Figure 24 is a schematic flow chart of a specific embodiment of the electronic device control method of the present application;

Figure 25 is a schematic block diagram of an embodiment of the electronic device provided by this application;

Figure 26 is a schematic block diagram of a computer storage medium provided by an embodiment of the present application.

Reference signs:

Button 100, fixing part 200, positioning part 300, Hall element 400, magnetic part 500, magnetic isolation material layer 600;

Main body part 110, positioning groove 111, installation notch 112, pressing part 120, accommodating groove 210, through hole 21, elastic member 310, positioning block 320, detection center 410, first magnetic component 510, second magnetic component 520;

Housing 10a, display screen 20a, control circuit board 30a, key assembly 40a.

【Detailed ways】

The present application will be described in further detail below with reference to the accompanying drawings and examples. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some, not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

The terms “first”, “second” and “third” in the embodiments of this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship between components in a specific posture (as shown in the drawings). , sports conditions, etc., if the specific posture changes, the directional indication will also change accordingly. The terms "including" and "having" and any variations thereof in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or components inherent to such processes, methods, products or devices.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

As used herein, "electronic devices" (or simply "terminals") include, but are not limited to, devices configured to be connected via wired lines (e.g., via the Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (e.g., for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or a device for receiving/transmitting communication signals through the wireless interface of another communication terminal. A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; may include radiotelephones, pagers, Internet/Intranet access , web browsers, planners, calendars, and/or PDAs with Global Positioning System (GPS) receivers; as well as conventional laptop and/or handheld receivers or other electronic devices including radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

In conventional technology, a three-stage sliding switch is configured on the side of the mobile phone to facilitate users to quickly switch the mobile phone between ring, vibrate and silent states. The position of the three-stage sliding switch is detected using a magnet and two single-axis Hall devices. The magnet is installed on the sliding keycap. The Hall sensor is welded on the main board and the distance in the sliding direction of the switch is greater than the switch stroke. The sliding keycap , when the sliding switch is in the upper, middle and lower positions, because the spatial distance between the magnet and the Hall sensor is different, the magnetic induction lines passing through the two Hall devices are different. According to the difference in the magnetic induction intensity detected by the two Hall devices Judge the position of the sliding switch and set the phone status.

Mobile phones are increasingly pursuing thinness and lightness, and the internal device layout space is very limited. Due to the higher requirements for mobile phone imaging performance, the number and single size of cameras are increasing. The camera layout position and the three-stage switch on the side are spaced far apart inside the mobile phone. To further reduce the problem, there are multiple magnets integrated into the camera. When the camera is near the three-stage switch on the side, the magnetic field of the magnets inside the camera will interfere with the Hall sensor, causing abnormal position detection of the three-stage switch and abnormal phone status settings; at the same time, The magnetic field generated by the magnet used for position detection by the three-stage switch on the side will also interfere with the magnet inside the camera, causing the camera's anti-shake function to be abnormal.

In addition, using two single-axis Hall devices for detection requires a larger layout space, and has high requirements on the relative position of the two Hall devices.

In view of the above problems, an embodiment of the present application provides a key assembly. Please refer to Figures 1 and 2 together. Figure 1 is a schematic diagram of the overall structure of an embodiment of the key assembly of the present application; Figure 2 is a schematic diagram of the key in the embodiment of Figure 1 Schematic diagram of the structural breakdown of components. It should be noted that the key components in the embodiments of the present application are used in electronic devices, and the electronic devices may include mobile phones, tablet computers, laptops, Bluetooth speakers, headphones, watches, wearable devices and other electronic devices with keys. In this embodiment, the key assembly for electronic equipment includes a key 100, a fixing part 200, a positioning part 300, a Hall element 400 and a magnetic part 500.

Specifically, please refer to Figures 1, 3, 4 and 5 together. Figure 3 is a schematic structural cross-sectional view of the key assembly along line A-A in the embodiment of Figure 1. Figure 4 is a schematic cross-sectional view of the key assembly along line A-A in the embodiment of Figure 1. A schematic cross-sectional view of the structure along line B-B; Figure 5 is an exploded schematic view of the structure of the fixing part and the positioning part of the key assembly in the embodiment of Figure 1. The fixing member 200 may be a structural component such as a housing (such as a middle frame) or a circuit board of an electronic device, or a bracket structure as shown in this embodiment. The bracket structure may be fixedly connected to the housing. Optionally, the fixing member 200 is provided with an accommodating groove 210. One end of the positioning member 300 holds the bottom of the accommodating groove 210, and the other end cooperates with the positioning groove 111 on the button 100 to achieve positioning of the button 100. .

Optionally, please refer to FIG. 6 as well. FIG. 6 is a schematic structural diagram of a button of the button assembly in the embodiment of FIG. Operator's hand contact. A plurality of positioning grooves 111 (arranged along the first direction) are provided on a side surface of the main body 110 away from the pressing portion 120 . Optionally, the main body 110 of the button 100 is provided with at least two positioning grooves 111 on the side facing the positioning member 300 (the illustration of the embodiment of this application takes three positioning grooves 111 as an example for illustration), where , the button 100 can slide in the direction of arrow Y in the figure relative to the fixing member 200. When the button 100 slides to different positions, the positioning member 300 cooperates with different positioning grooves 111 to position the button 100 at different positions.

Optionally, please continue to refer to Figures 6 and 2. The main body 110 of the button 100 is also provided with a mounting notch 112 on the side surface away from the pressing portion 120. The mounting notch 112 is used to install the magnetic component 500. The magnetic component 500 is installed by The notch 112 is fixedly connected to the button 100 by, for example, bonding. The magnetic part 500 can move with the button 100, and then toggled to trigger the corresponding function. Among them, the magnetic component 500 can be a magnetic component structure such as a magnet, and cooperates with the Hall element 400 to realize the triggering of corresponding functions. Specifically, the button 100 can drive the magnetic component 500 to move relative to the Hall element 400 , thereby changing the induced magnetic field between the magnetic component 500 and the Hall element 400 . The Hall element 400 and the magnetic component 500 are spaced apart along the third direction.

Among them, the corresponding functions mentioned here are the application scenarios in which the magnetic component 500 and the Hall element 400 cooperate, including setting the status of the electronic device to mute, vibrate, ring, and other applications related to the reminder function of the electronic device; in addition, it can also be Used for self-defined functions, such as triggering the camera to turn on or off, controlling music playback (pause, previous song, next song), and even controlling the up and down scroll bars of the display interface and switching the position of application icons, etc. Application scenarios can be set by those skilled in the art or users, and are not listed one by one or specifically limited here. Among them, the Hall element 400 is fixed on the fixing member 200. Specifically, It may be embedded inside or on the surface of the fixing member 200 .

Optionally, please continue to refer to FIG. 5 . The positioning member 300 in this embodiment includes an elastic member 310 and a positioning block 320 . One end of the elastic member 310 holds the bottom of the accommodating groove 210 of the fixing member 200 , and the other end holds the positioning block 320 . Position the block 320 so that the positioning block 320 cooperates with the positioning groove 111 on the main body 110 of the key 100 . Optionally, the elastic member 310 in this embodiment can be a compression spring, and the positioning block 320 can be a small ball structure, specifically, it can be a stainless steel ball. In some other embodiments, the positioning member 300 can also be other structures, such as elastic probes, etc. Regarding this part of the extended feature embodiments, it is within the understanding of those skilled in the art and will not be listed one by one here. Elaborate.

Optionally, please continue to refer to FIG. 3. In order to reduce the magnetic field interference of the magnetic component 500 to the external environment and other components of the electronic device, the magnetic component 500 in this embodiment is also provided with magnetic isolation on the side of the non-corresponding Hall element 400. The material layer 600 further reduces the interference of the magnetic component 500 to the outside world. Among them, the magnetic isolation material layer 600 is not limited to the side facing away from the Hall element 400 in the figure, and can also be wrapped around all sides of the non-corresponding Hall element 400. This time there is no specific limitation.

Please refer to Figures 7 and 8 together. Figure 7 is a schematic structural view of the key assembly in the embodiment of Figure 1 in a mating state with the electronic device housing. Figure 8 is a schematic cross-sectional view of the structure along line C-C in the embodiment of Figure 7. Fixed The component 200 is fixedly connected to the housing 20, and the positioning component 300 is used to position the button 100. The button 100 is exposed in the through hole 21 of the housing 20 , and the button 100 can slide along the strip-shaped structure through hole 21 in the Y direction in the figure.

Optionally, please refer to FIG. 9 , which is a schematic structural diagram of the relative positional relationship between the magnetizing direction of the magnetic component and the Hall element in the embodiment of FIG. 1 . The Hall element 400 in this embodiment can detect changes in the magnetic field in at least two directions. Compared with detecting the magnetic induction intensity in the conventional technical solution, it detects the direction of the magnetic field. Optionally, the Hall element can be a three-axis Hall element. The components of the induced magnetic field along the first direction, the second direction and the third direction can be detected, wherein the second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction. Among them, the first direction (Y direction), the second direction (Z direction) and the third direction (X direction) are perpendicular to each other, forming a three-dimensional coordinate system. The magnetization direction of the magnetic component 500 is parallel to the moving direction of the magnetic component 500 relative to the Hall element 400 (arrow Y direction).

The three-axis Hall element 400 integrates Hall sensors in the three directions of XYZ. Each Hall sensor can detect the magnetic induction intensity in one direction. The internal circuit converts the detected magnetic induction intensity value into a digital signal and then transmits it through the communication interface. To the main processor of an electronic device. A magnet (magnetic component 500) is installed on the three-stage switch button. When the button slides to different positions, the relative position between the magnet and the three-axis Hall element changes; the three-axis Hall element can be connected and transmitted to the motherboard through FPC. Signal.

Please refer to Figures 10a-10c together. Figure 10a is a schematic structural diagram of the Hall element and the magnetic component in the first relative position in Figure 9; Figure 10b is the structure of the Hall element and the magnetic component in the second relative position in Figure 9. Schematic diagram; Figure 10c is a structural schematic diagram of the third relative position state of the Hall element and the magnetic component in Figure 9; in this embodiment, a three-stage switch structure is used as an example for explanation. The Hall element 400 can be used to control the magnetic The component 500 is detected at three position points, which are located at both ends (the relative position state in Figures 10a and 10c) and the middle point (the relative position state in Figure 10b) of the stroke range of the magnetic component 500. Please continue to refer to FIG. 9 . The detection center 410 of the Hall element 400 corresponds to the midpoint of the stroke range of the magnetic component 500 .

The detection principle is as follows: in the three stroke positions of the side three-stage switch, the relative positions of the magnetic component 500 and the three-axis Hall element 400 are different, and the magnetic induction lines passing through the Hall element 400 are at the angle between the Y direction and the Z direction. Differently, the angle between the magnetic induction lines in the Y direction and the Z direction can be calculated based on the Y-direction and Z-direction magnetic induction intensity detected by the Hall element 400. The three-stage type can be determined based on the angle between the Y-direction and the Z-direction of the magnetic induction lines. switch position. Simulate the magnetic induction intensity detected in the three axes when the magnetic component 500 moves along the Y direction from the position in Figure 10a to Figure 10c. For specific simulation diagrams, please refer to Figures 11 and 12 together. Figure 11 is the Huo in Figure 9. Figure 12 is a schematic curve diagram of the three-axis magnetic induction intensity value sensed by the Hall element. Figure 12 is a graph of the angle change curve between the Y direction and the Z direction of the magnetic induction line sensed by the Hall element in Figure 9.

Among them, the data in Figures 11 and 12 are based on the movement of the magnetic component 500 along the Y axis in Figure 9, and the Hall element 400 corresponds to the bottom of the magnetic component 500, where the curve x in Figure 11 represents that the Hall element 400 detects at X The magnetic field strength in the direction, the curve y represents the magnetic field strength detected by the Hall element 400 in the Y direction, and the curve z represents the magnetic field strength detected by the Hall element 400 in the Z direction. As can be seen from Figure 11, left and At the three positions on the middle and right, the relative values of the Y-axis and Z-axis of the magnetic field show the characteristics of the curve in Figure 11, that is, the total value of the magnetic field remains unchanged, but the components in the three axes are different (from the magnetization direction of the magnetic part 500 and It can be seen from the relative movement direction of the Hall element 400 that the component in the X-axis direction is zero and remains unchanged).

Calculate the magnetic field rotation tangent angle arctan (y/z) for the magnetic field in the Y-axis and Z-axis directions. Due to the relative movement distance between the Hall element and the magnetic part (the Hall element detects three position points, the three position points are respectively located at both ends and midpoint of the stroke range), the magnetic field tangent angle = arctan (z/x) is exactly one period (-π/2～π/2) during the entire stroke. It belongs to the linear interval, which is very helpful for judging and distinguishing the positions of the three keys. In the three positions of left, middle and right (switch positions a, b, c in Figure 10), the relative values of the Y-axis and Z-axis of the magnetic field show the above characteristics, that is, the total value of the magnetic field remains unchanged, but the components of the three axes no the same. Within the stroke range of the key, the arc tangent value of the ratio of the intensity value of the induced magnetic field along the first direction and the intensity value along the third direction detected by the Hall element has a one-to-one correspondence with the position of the magnetic component relative to the Hall element. relation.

The entire angle distribution is π, and the angle rotation is from -π/2 to π/2. It can be seen that when the magnetic component 500 is at the leftmost end of the 3-stage switch (the relative position state in Figure 10c), the angle is -π/2; the middle position (relative position state in Figure 10b), the angle is 0; at the rightmost end (relative position state in Figure 10a), the angle is π/2.

As can be seen from Figure 12, the angle between the Y-direction and the Z-direction of the magnetic field lines detected by the three-axis Hall element 400 when the magnetic component 500 moves at different distances in the intermediate position is calculated. The included angle is consistent with the moving direction of the magnetic component 500. , the location of the three-stage switch can be determined based on the difference in angle values. In addition, in some other embodiments, the plane angle calculated using two-axis data can also be extended to the space vector angle calculated using three-axis data, to further improve the anti-interference capability.

Calibration is required before electronic equipment is fully assembled. The specific calibration process includes moving the buttons to different positions and recording the corresponding position angle values and setting thresholds, and setting corresponding functions under different angle values and angle thresholds. The technical solution in this embodiment performs a calibration when the electronic device is assembled, and a dynamic calibration algorithm that combines the posture and scene of the electronic device can be developed later. The specific setting method is within the understanding of those skilled in the art and will not be described again here.

The detection method of the key assembly in this embodiment changes from detecting the magnetic induction intensity in the conventional scheme to detecting the direction of the magnetic field. When there is magnetic interference in a single direction, it has little impact on the direction of the magnetic field and improves the anti-interference capability. By replacing multiple single-axis Hall elements in conventional technical solutions with one three-axis Hall element, layout space can be saved, which provides conditions for miniaturization of electronic equipment.

Please refer to Figure 13. Figure 13 is a schematic structural cross-sectional view of another embodiment of the key assembly of the present application. Different from the previous embodiment, the magnetic component 500 in this embodiment includes a first magnetic component 510 with opposite magnetization directions and The second magnetic component 520. The first magnetic component 510 and the second magnetic component 510 are arranged side by side along the first direction. Please refer to Figure 14. Figure 14 is a schematic diagram of the magnetizing direction of the magnetic component in the embodiment of Figure 13. In this embodiment, In the example, the first magnetic component 510 and the second magnetic component 520 may be arranged side by side in abutment along the first direction (Y direction) perpendicular to the magnetization direction (Z direction in the figure). Specifically, the first magnetic component 510 and the second magnetic component 520 may be arranged side by side. The second magnetic component 520 is adhesively connected. The magnetic pole directions of the first magnetic part 510 and the second magnetic part 520 are both disposed toward the Hall element 400 . In addition, in some other embodiments, the magnetic component 500 is not limited to including the first magnetic component 510 and the second magnetic component 520 , but may also be in a structural form including multiple magnetic components. Here, only two magnetic components are taken as an example. illustrate.

The embodiment of this application takes a three-stage switch structure as an example for description. Please refer to Figure 15. Figure 15 is the structure of the mating position of the magnetic component and the Hall element in the embodiment of Figure 13. Structure diagram. In order to increase the anti-interference ability of the magnetic component and the Hall element, in the three-stage switch structure in the embodiment of the present application, the width of the first magnetic component 510 and the second magnetic component 520 perpendicular to the magnetizing direction (also That is, the widths in the first direction (K1, K2) are the same. Optionally, the widths of the first magnetic component and the second magnetic component along the first direction can be 1-5mm, specifically 1mm, 2mm, 3mm, 4mm, 5mm, etc., there are no specific limitations here. The total width K of the first magnetic component 510 and the second magnetic component 520 perpendicular to the magnetizing direction is the same as the stroke range L of the key 100 . The detection center 410 of the Hall element 400 corresponds to the midpoint of the stroke range L of the key 100 .

Optionally, please continue to refer to Figure 13. The distance between the Hall element 400 and the surface of the magnetic component 500 facing the Hall element 400 is 0.5-2mm, specifically it can be 0.5mm, 0.6mm, 0.8mm, 1mm, 1.5mm. , 2mm, etc.

Please continue to refer to Figure 15. The Hall element 400 in this embodiment is used to detect the key 100 at three position points (switch positions a, b, c). The three position points are located at both ends and midpoint. It should be noted here that the key stroke range L is expressed as the change distance of the detection position when the key moves from one end to the other end. This distance is twice the movement distance of the key. The Hall element in the embodiment of the present application can detect the components of the induced magnetic field along the first direction (Y direction), the second direction (Z direction) and the third direction (X direction), where the second direction and the third direction are both perpendicular. in the first direction, and the second direction is perpendicular to the third direction. That is, the first direction (Y direction), the second direction (Z direction) and the third direction (X direction) are perpendicular to each other, forming a three-dimensional coordinate system.

Alternatively, in an embodiment, the widths (K1, K2) of the first magnetic component 510 and the second magnetic component 520 may be 2 mm, the total width K may be 4 mm, and the stroke range L may be 4 mm. It should be noted here that in some other embodiments, the length of the two magnetic components does not necessarily have to be exactly equal to the distance of the key stroke range as in the above solution. The length can be longer or shorter than the key distance. When the length of the magnetic part is greater than the running distance, the converted tangent angle will be less than -π/2~π/2; when the length of the magnetic part is less than the running distance, the converted tangent angle will be greater than -π/2~π /2 cycle, so it is necessary to first determine which cycle it is in. The embodiment of the present application only takes the total width K of the first magnetic component 510 and the second magnetic component 520 as being the same as the key stroke range L as an example for description. Of course, in some other embodiments, there can also be 2-segment, 4-segment or even more-segment keys. The principles are similar. As long as the design meets the principles in this application, multi-segment key detection is feasible.

When the key moves from one end of the travel range to the other end, the Hall element 400 detects that the magnetic field angle of the first magnetic component 510 and the second magnetic component 520 changes from -90° to 90°, where the travel range of the key The magnetic field angles at both ends are -90° and 90° respectively, and the magnetic field angle at the midpoint of the stroke is zero; the angle range of the position identification area at one end of the key stroke range is -90° to -70°, and the position identification area at the other end of the key stroke range The angle range is 70° to 90°, and the angle range of the midpoint position identification area of the key travel range is -10° to 10°.

To conduct the simulation experiment, please refer to Figures 16 to 18. Figure 16 is a schematic diagram of the magnetic field coordinate system of the magnetic component in the embodiment of Figure 13. Figure 17 is a schematic curve diagram of the magnetic field in the three-axis direction detected by the Hall element in Figure 16. Figure 18 is A schematic diagram of the magnetic field angle of the magnetic field simulation experiment of the magnetic part in Figure 16, where the data in Figures 17 and 18 are based on the movement of the magnetic part 500 along the Y-axis in Figure 16, and the Hall element 400 corresponds to the bottom of the magnetic part 500, where, Figure In 17, the curve x represents the magnetic field strength detected by the Hall element 400 in the X direction, the curve y represents the magnetic field strength detected by the Hall element 400 in the Y direction, and the curve z represents the Hall element 400 detected the magnetic field strength in the Z direction. The magnetic field strength in the direction can be seen from Figure 17. At the three positions of left, middle and right, the relative values of the X-axis and Z-axis of the magnetic field show the characteristics of the curve in Figure 17, that is, the total value of the magnetic field remains unchanged, but in the three axes The components are different (it can be seen from the magnetization direction of the magnetic component 500 and the relative movement direction with the Hall element 400 that the component in the Y-axis direction is zero and remains unchanged).

Calculate the magnetic field rotation tangent angle arctan (z/x) for the magnetic field in the X-axis and Z-axis directions. Due to the relative movement distance between the Hall element and the magnetic part (the Hall element detects three position points, the three position points are respectively located at both ends and midpoint of the stroke range), the magnetic field tangent angle = arctan (z/x) is exactly one period (-π/2～π/2) during the entire stroke. It belongs to the linear interval, which is very helpful for judging and distinguishing the positions of the three keys. In the three positions of left, middle and right (switch positions a, b, c in Figure 15), the relative values of the X-axis and Z-axis of the magnetic field show the above characteristics, that is, the total value of the magnetic field remains unchanged, but the components of the three axes no the same.

The entire angle distribution is π, and the angle rotation is from -π/2 to π/2. It can be seen that when the magnetic part 500 is at the leftmost end of the 3-stage switch (magnetic part position 1), the angle is -π/2; the middle position (magnetic part 500) When the magnetic piece is at position 2), the angle is 0; when it is at the far right end (magnetic piece is at position 3), the angle is π/2. Anti-interference situation: Since X and Z data are used to calculate the position, Y-direction interference has no effect. It is assumed here that there is 1mT interference in X and Z respectively. Please refer to Figure 19. Figure 19 is a schematic diagram of the magnetic field angle cutting of the magnetic field simulation experiment in the case of 1mT interference in the X and Z directions of the magnetic component in Figure 16. After 1mT interference is added to X and Z respectively, the angle cutting curve is the same as when there is no interference. Almost coincident.

Since the overall energy of the magnetic field does not decrease, but only rotates in the direction, it is assumed that the magnetic field of the simulated magnetic part can reach a maximum of 80mT. At this time, if there is 1mT interference, the impact on the angle offset = arctan (1/80) = 0.012, the impact The accuracy percentage is 0.012/3.14=0.4%. The analysis of anti-interference effect is very good. Calculate the percentage of interference for each 0.1mm in the 4mm stroke. Please refer to Figure 20. Figure 20 is a schematic diagram of the percentage of the impact of 1mT interference on the magnetic field cutting angle. It can be seen that the impact of 1mT interference on the magnetic field cutting angle is between 0.15% and 0.4%.

Optionally, the angle can be divided into 5 segments:

(1)-90°～-70°: magnetic part position 3;

(2)-70°～-10°: buffer interval;

(3)-10°～10°: Magnetic part position 2;

(4)10°～70°: buffer interval;

(5)70°～90°: Magnetic part position 1.

Please refer to the table below, which contains multiple data tables for magnetic field interference.

(1) From the interference from key position 3 (that is, the magnetic part position 3) to the key position 2, the minimum required angle is from -70° (-1.22) to -10° (-0.17), and the additional interference required on the Z axis is arctan (z/0.04)=-0.17, it is calculated that z=-0.006(T), so the interference required in Z direction is -0.116-(-0.006)=110mT. That is, adding 110mT interference in the Z direction will cause position judgment errors.

(2) From the interference from key position 2 to key position 3, the interference needed to be added to the Z axis is arctan (z/0.12) = -1.22. Calculate z = -0.327 (T), so the interference needed to be added to the Z axis is -0.037- (-0.327)≈300mT.

(3) To interfere from key position 2 to key position 1, the minimum interference needs to be from 10° (0.17) to 70° (1.22). The additional interference required on the Z axis is arctan (z/0.12) = 1.22, and z = 0.328 ( T), so the interference required in the Z direction is 0.328-0.019≈300mT.

(4) From the interference from position 1 to button position 2, the interference required on the Z axis is arctan (z/0.04) = 0.156, which is calculated as Z = 0.006 (T). Therefore, the interference required on the Z axis is 0.119-0.006 ≈ 110mT.

From the above calculations, it can be seen that there is almost no interference that can produce this effect. The main thing to pay attention to is whether the layout will interfere with other modules. At the same time, the anti-interference ability can be adjusted by adjusting the size of the buffer area.

Optionally, in the embodiment of the present application, the buffer zone can be further increased and the angle of the identification zone can be reduced. Specifically, the angle range of the position identification zone at one end of the stroke range can be -90° to -80°, and the angle range of the position identification zone at the other end of the stroke range can be -90° to -80°. The angle range of the position identification area is 80° to 90°, and the angle range of the position identification area at the midpoint of the stroke range is -5° to 5°. The remaining intervals are buffer zones. The narrower the position recognition interval is adjusted and the wider the buffer area, the stronger the anti-interference performance. But the requirements for the structure in place will also be higher. Therefore, in the design, it is necessary to combine the actual reachable range of the structure with the calculation and actual measurement of the interference degree to obtain the optimal compatible design for both.

An embodiment of the present application also provides an electronic device. Please refer to Figure 21. Figure 21 is a schematic diagram of the overall structure of an embodiment of the electronic device of the present application. It should be noted that the electronic device in the embodiment of the present application may include a mobile phone and a tablet computer. , laptops, wearable devices, and any other electronic device with buttons. In this embodiment, a mobile phone is used as an example for illustration. Optionally, the electronic device in the embodiment of the present application includes a display screen 20a, a control circuit board 30a, a housing 10a, and a key assembly 40a; wherein the display screen 20a cooperates with the housing 10a to form an accommodation space (not labeled in the figure), The control circuit board 30a is disposed in the accommodation space and is electrically connected to the display screen 20a and the key assembly 40a. The key assembly 40a is connected to the housing. The control circuit board 30a is used to control the display screen 20a and receive trigger signals from the key assembly 40a. For the detailed structure of the key assembly 40a, please refer to the relevant descriptions of the foregoing embodiments and will not be described again here.

Compared with conventional technology, the electronic equipment provided in the embodiments of the present application is provided with a Hall element that can detect magnetic field changes in multiple directions. The detection of magnetic induction intensity in the scheme is changed to the detection of magnetic field direction, which has the characteristics of strong anti-interference ability and saving layout space.

In addition, an embodiment of the present application also provides a method for controlling an electronic device. Please refer to FIG. 22 . FIG. 22 is a schematic flowchart of an embodiment of a method for controlling an electronic device of the present application. The control method includes but is not limited to the following steps.

Step S100: Set the angle threshold of the Hall element in the key assembly.

In this step, please refer to FIG. 23 for details. FIG. 23 is a schematic flowchart of setting the angle threshold of the Hall element of the key assembly according to an embodiment. The process includes the following steps.

Step S110: Obtain magnetic field angle values when the keys are at different positions.

Step S120: Set corresponding angle thresholds for different magnetic field angle values.

Step S130: Record and save the corresponding relationship between the angle threshold and the location.

In this embodiment, three-stage position detection is used as an example for explanation. Among them, the following steps are included: move the button to the upper position (that is, the first position); obtain and record the angle value at the position, such as 10 degrees; save the angle value of the upper position and set the first angle threshold, such as the first angle The threshold can be set to 9-11 degrees; move the button to the middle position (that is, the second position); obtain and record the angle value at that position, such as 90 degrees; save the middle position angle value and set the second angle threshold , for example, the second angle threshold can be set to 88-92 degrees; move the button to the lower position (that is, the third position); obtain and record the angle value at the position, such as -10 degrees; save the lower position angle value and Set a third angle threshold. For example, the third angle threshold can be set to -9 to -11 degrees.

Please continue to refer to Figure 22. The control method in the embodiment of the present application also includes step S200 of detecting the current magnetic field angle value; specifically, this step is based on the intensity value of the induced magnetic field along the first direction detected by the Hall element and the intensity value along the first direction. The arctangent value of the ratio of the intensity values in the three directions determines the current magnetic field angle value. For specific detection principles, please refer to the relevant descriptions of the foregoing embodiments, which will not be described again this time.

Step S300: Trigger the corresponding function of the electronic device according to the corresponding relationship between the current magnetic field angle value and the angle threshold.

Please refer to FIG. 24 as well. FIG. 24 is a schematic flowchart of a specific embodiment of the electronic device control method of the present application. The control method includes the following steps. Step S201, polling to obtain the current magnetic field angle; Step S202, determine whether the angle value is within the angle threshold of the upper position, if so, proceed to step S203, set the mobile phone to the ringing state; otherwise, proceed to step S204, determine whether the angle value is within Within the angle threshold of the middle position, if so, proceed to step S205 and set the mobile phone to the vibrating state; otherwise, proceed to step S206 to determine whether the angle value is within the angle threshold of the lower position. If so, proceed to step S207 to set the mobile phone to the silent state. , otherwise go to step S208 and end the process. In this embodiment, only one cell phone ringtone state is taken as an example for description.

Please refer to Figure 25. Figure 25 is a schematic block diagram of an embodiment of an electronic device provided by this application. The electronic device 80 includes a processor 81 and a memory 82 connected to each other. The memory 82 is used to store program data, and the processor 81 is used to execute Program data to implement the following methods:

Set the angle threshold of the Hall element of the button component;

Detect the current magnetic field angle value;

Referring to Figure 26, Figure 26 is a schematic structural block diagram of a computer storage medium provided by an embodiment of the present application. Program data 91 is stored in the computer storage medium 90. When executed by a processor, the program data 91 is used to implement the following methods. :

Set the angle threshold of the Hall element of the button component;

Detect the current magnetic field angle value;

For detailed processes of each of the above steps, please refer to the relevant descriptions of the foregoing embodiments, which will not be described in detail here.

In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation described above is only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be The combination can either be integrated into another system, or some features can be ignored, or not implemented.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

If the integrated units in the above other embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code. .

In conventional technology, there are also structural solutions that use magnets and Hall elements to coordinate three-stage switch positioning. The general structure is a single magnet pairing a single Hall or a single magnet pairing a double Hall structure. Among them, a single magnet and a single Hall mainly use magnetic field changes to detect different positions of the switch. The requirement is that the magnet needs to be close enough to the Hall device to meet the external anti-interference requirements. When the structure is limited and the magnet cannot meet the position requirements with the Hall, this solution has the disadvantage of being easily disturbed. In the structural scheme of a single magnet versus dual Halls, when the magnet moves, magnetic field changes occur in the two Halls. Based on the changes detected by the two Halls, the position of the magnet movement is determined. The disadvantage of this solution is that although the difference between the two Halls can be made, the anti-interference performance is still not strong. Interference at the mT level can cause disturbances, and this solution requires complex algorithms and user-end self-calibration processes, which requires high computing power and poor reliability.

In view of the above problems, an embodiment of the present application also provides a key assembly. Some of the same features of the key assembly in this embodiment and the key assembly in the previous embodiment will not be described again here. In this embodiment, the differences will be highlighted. part characteristics.

The key assembly in this embodiment is designed with two magnetic parts arranged side by side and with opposite magnetization directions on the sliding key, and performs magnetic field induction with a Hall element. The Hall element realizes the key sensing by sensing changes in the magnetic field. Position detection has the characteristics of accurate position detection and strong anti-interference ability.

The above are only some of the embodiments of the present application, and are not intended to limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of the present application, or directly or indirectly used in other related The technical fields are all equally included in the scope of patent protection of this application.

Claims

A key assembly, characterized in that the key assembly includes: a key, a magnetic part, a fixing part and a Hall element; the magnetic part is fixedly connected to the key, and the Hall element is fixed on the fixing part ; The button can drive the magnetic component to move in the first direction relative to the Hall element, thereby changing the induced magnetic field between the magnetic component and the Hall element; wherein, the magnetization of the magnetic component The direction is parallel to the first direction or the magnetic component includes a first magnetic component and a second magnetic component with opposite magnetization directions. The Hall element can detect changes in the magnetic field in at least two directions.
The key assembly according to claim 1, wherein the Hall element is a three-axis Hall element capable of detecting components of the induced magnetic field along the first direction, the second direction and the third direction, wherein The second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction. The Hall element and the magnetic component are along the third direction. Interval settings.
The key assembly according to claim 2, wherein the magnetizing direction of the magnetic component is parallel to the first direction; within the stroke range of the key, the induction detected by the Hall element The arctangent value of the ratio of the intensity value of the magnetic field along the first direction to the intensity value along the third direction has a one-to-one correspondence with the position of the magnetic component relative to the Hall element.
The key assembly according to claim 1, wherein the magnetic component includes a first magnetic component and a second magnetic component with opposite magnetization directions, and the first magnetic component and the second magnetic component are along the The first directions are arranged side by side, and the magnetic pole directions of the first magnetic component and the second magnetic component are both facing the Hall element.
The key assembly according to claim 4, wherein the first magnetic component and the second magnetic component are arranged side by side and abutting along the first direction, and the first magnetic component and the second magnetic component The total width of the member along the first direction is twice the moving distance of the key.
The key assembly according to claim 5, wherein the magnetizing direction of the first magnetic member is perpendicular to the first direction; the width of the first magnetic member along the first direction is consistent with the width of the first magnetic member. The two magnetic parts have the same width along the first direction.
The key assembly according to claim 5, wherein the distance between the Hall element and the surface of the magnetic part facing the Hall element is 0.5-2mm; the first magnetic part or the The width of the second magnetic component along the first direction is 1-5 mm.
The key assembly according to any one of claims 1 to 7, characterized in that the Hall element is used to detect the magnetic member at three position points, and the three position points are respectively located on the Both ends and the midpoint of the travel range of the key; the detection center of the Hall element corresponds to the midpoint of the travel range of the key.
The key assembly according to claim 8, characterized in that, during the movement of the key from one end of the stroke range to the other end, the Hall element detects the first magnetic component and the second magnetic component. The magnetic field angle of the part changes from -90° to 90°, where the magnetic field angles at both ends are -90° and 90 degrees respectively, and the magnetic field angle at the midpoint is zero; the angle range of the position identification area at one end of the travel range is -90 ° to -70°, the angle range of the position identification zone at the other end of the stroke range is 70° to 90°, and the angle range of the position identification zone at the midpoint of the stroke range is -10° to 10°.
The key assembly according to claim 9, wherein the angle range of the position identification area at one end of the stroke range is from -90° to -80°, and the angle range of the position identification area at the other end of the stroke range is from 80° to 90°, and the angle range of the position identification area at the midpoint of the stroke range is -5° to 5°.
The key assembly according to any one of claims 1 to 7, characterized in that a magnetic isolation material layer is provided on the side of the magnetic component that does not correspond to the Hall element.
The key assembly according to any one of claims 1 to 7, wherein the key includes a plurality of positioning grooves arranged along the first direction; the key assembly further includes a positioning member, and the positioning member One end is connected to the fixed part, and the other end is used to cooperate with the positioning groove; when the button moves relative to the Hall element, the positioning part cooperates with different positioning grooves to realize the positioning of the Different positioning of keys.
An electronic device, characterized in that the electronic device includes a housing, a control circuit board and a key assembly according to any one of claims 1 to 12; the fixing member in the key assembly is fixedly connected to the housing. , the control circuit board is electrically connected to the Hall element in the key assembly.
The electronic device according to claim 13, wherein the key assembly is the key assembly of claim 3; and the control circuit board is configured to:

The position of the key relative to the fixing member is determined based on the arc tangent value of the ratio of the component of the induced magnetic field along the first direction and the component along the third direction detected by the Hall element.
The electronic device according to claim 13, characterized in that the key assembly is the key assembly according to any one of claims 4 to 7; the control circuit board is configured to:

The position of the key relative to the fixing member is determined based on the arc tangent value of the ratio of the component of the induced magnetic field along the second direction and the component along the third direction detected by the Hall element.
A control method based on the electronic device of claim 13, characterized in that the control method includes:

Set the angle threshold of the Hall element in the key assembly;

Detect the current magnetic field angle value;

The corresponding function of the electronic device is triggered according to the corresponding relationship between the current magnetic field angle value and the angle threshold.
The control method according to claim 16, wherein the step of setting the angle threshold of the Hall element in the key assembly includes:

Obtain the magnetic field angle values when the button is in different positions, set corresponding angle thresholds for different magnetic field angle values, and record and save the corresponding relationship between the angle thresholds and the positions.
The control method according to claim 16, wherein the step of setting the angle threshold of the Hall element in the key assembly includes: moving the key to the first position, acquiring and recording the magnetic field at the first position. Angle value, save the magnetic field angle value at the first position and set the first angle threshold; move the button to the second position, obtain and record the magnetic field angle value at the second position, save the magnetic field angle value at the second position and Set the second angle threshold; move the button to the third position, obtain and record the magnetic field angle value at the third position, save the magnetic field angle value at the third position and set the third angle threshold.
The control method according to claim 18, characterized in that when the button is located at the first position, the electronic device is in ringing mode; when the button is located at the second position, the electronic device The device is in vibration mode; when the button is in the third position, the electronic device is in silent mode.
A computer storage medium, characterized in that the computer storage medium stores program data, and when the program data is executed by the processor, the program data is used to implement the control as claimed in any one of claims 16-19 method.