Key motor and electronic device

Abstract

The present invention relates to the technical field of keys, and especially to a key motor and an electronic device. The key motor comprises a hollow housing having an opening, a stator assembly fixed to two opposite sides of the housing, a vibrator assembly having two ends respectively elastically supported at two opposite ends of the housing, and a key covering and fixed to the vibrator assembly by means of an opening end of the housing. Hall sensors are fixed to second pole cores, and the Hall sensors detect a pressing action applied to the key. Compared with the prior art, the Hall sensors in the key motor of the present invention are fixed to the stator assembly, and are integrated with the stator assembly, and therefore do not occupy an additional thickness space, thereby achieving an ultra-thinned structure. When a vibrator undergoes displacement, the Hall sensors can directly detect a change in the B value of magnetic steel of the vibrator assembly, and there is no need to additionally increase magnetic steel.

Description

Button motors and electronic components Technical Field

[0001] This invention relates to the field of button technology, and more particularly to a button motor and electronic device. Background Technology

[0002] In modern electronic devices, button motors accurately detect the position and pressure of pressed buttons to achieve precise control, providing users with intuitive and accurate tactile feedback. They are widely used in smartphones, tablets, home appliances and other electronic devices. Technical issues

[0003] However, the button motors in related technologies require the use of Hall sensors to sense the pressing signal, and the Hall sensors occupy additional thickness space of the button motor, increasing the thickness of the button motor. At the same time, since different pressing actions will present different pressing states, the button motors in related technologies have difficulty accurately determining whether the pressing action is a light press, a hard press, or a slide, which makes it difficult to meet the requirements of modern electronic devices for high sensitivity of pressing signals and ultra-thinness.

[0004] Therefore, it is necessary to provide a new button motor and electronic device to solve the above-mentioned technical problems. Technical solutions

[0005] The purpose of this invention is to provide a button motor and electronic device, which aims to solve the requirements of high sensitivity and ultra-thin design for button motors when pressing signals.

[0006] To achieve the above objectives, the present invention provides a button motor, comprising a hollow housing with an opening, a stator assembly fixed to opposite sides of the housing, an oscillator assembly elastically supported at opposite ends of the housing, and a button fixed to the oscillator assembly by the opening of the housing. The stator assembly drives the oscillator assembly to move along a first direction. The stator assembly is disposed on opposite sides of the oscillator assembly along a second direction and spaced apart from the oscillator assembly. The second direction is perpendicular to the first direction. The oscillator assembly includes a magnet and first pole cores stacked and fixed to opposite sides of the magnet along the first direction. The button is fixed to one of the first pole cores on the side away from the magnet. The stator assembly includes two second pole cores fixed to opposite sides of the housing along the second direction, an iron core fixed to the second pole cores, and coils wound around the iron core.

[0007] The button motor also includes a Hall sensor for detecting the pressing action of the button, and the Hall sensor is fixed to the second electrode core.

[0008] Preferably, the Hall sensor is spaced apart from the outer periphery of the coil.

[0009] Preferably, the Hall sensor is spaced apart from the iron core, and the coil is spaced around the Hall sensor and the iron core.

[0010] Preferably, the Hall sensor comprises two, and the two Hall sensors are respectively fixed on one side of the two second pole cores that are close to each other, and the two Hall sensors are arranged opposite each other on opposite sides of the oscillator assembly along a third direction, wherein the third direction, the second direction and the first direction are perpendicular to each other.

[0011] Preferably, the button motor further includes two flexible circuit boards; one end of each of the two flexible circuit boards is fixed to the second pole core of the two stator assemblies and is electrically connected to the Hall sensor and the coil respectively, and the other end of each flexible circuit board extends out of the housing.

[0012] Preferably, the flexible circuit board includes a flexible circuit board body and a first extension formed by the flexible circuit board body extending away from the stator assembly. The flexible circuit board body is fixed to the second pole core and spaced apart from the coil. The flexible circuit board body is electrically connected to the Hall sensor and the coil, respectively.

[0013] Preferably, the flexible circuit board further includes a second extension formed by the flexible circuit board body extending toward the stator assembly, and the coil and the iron core are fixed to the second extension.

[0014] Preferably, the button motor further includes two non-metallic elastic elements fixed to opposite ends of the housing, the non-metallic elastic elements being able to deform along the first direction, and the two non-metallic elastic elements being fixedly connected to the vibrator assembly, thereby elastically supporting the vibrator assembly within the housing.

[0015] Preferably, the outer casing includes two side shells that are opposite to each other and spaced apart along the second direction, and two connecting shells that connect the two side shells to opposite ends along the third direction; the second pole core and the coil are respectively fixed to the side shells on the side that are close to each other, and the non-metallic elastic element is fixed to the connecting shell.

[0016] Preferably, the button motor further includes a connector, one end of which is fixedly connected to the non-metallic elastic element, and the other end of which is fixedly connected to the vibrator assembly.

[0017] Preferably, the button includes a button body and a pressure portion extending from the button body toward the magnet, the pressure portion extending to the first pole core and abutting against the first pole core.

[0018] Secondly, the present invention also provides an electronic device, the electronic device including an outer frame and a button motor as described in any of the above embodiments fixed within the outer frame; the outer side of the outer frame is provided with an inwardly recessed receiving groove, the outer shell is fixed within the receiving groove, and a portion of the button structure is received within the receiving groove and fixedly connected to the vibrator assembly. Beneficial effects

[0019] Compared with the prior art, the Hall sensor in the button motor of the present invention is fixed to the stator assembly and integrated with the stator assembly, thus achieving ultra-thinness without occupying additional thickness space; at the same time, since the vibrator assembly is a magnet, when the vibrator is displaced, the Hall sensor can directly detect the change in the B value of the magnet in the vibrator assembly, without the need to add an additional magnet; the Hall sensor includes two that are respectively fixed to two stator assemblies, and the two Hall sensors are arranged opposite each other along a third direction, so that the data changes can be detected by the Hall sensor to more accurately determine the pressing action. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 is a three-dimensional structural diagram of the button motor provided in Embodiment 1 of the present invention;

[0022] Figure 2 is an exploded three-dimensional structural diagram of the button motor provided in Embodiment 1 of the present invention;

[0023] Figure 3 is a three-dimensional structural diagram of the button motor provided in Embodiment 1 of the present invention;

[0024] Figure 4 is a cross-sectional view along line AA in Figure 3;

[0025] Figure 5 is a three-dimensional structural diagram of the button motor provided in Embodiment 2 of the present invention;

[0026] Figure 6 is a cross-sectional view along line BB in Figure 5;

[0027] Figure 7 is a three-dimensional structural diagram of the button motor provided in Embodiment 3 of the present invention;

[0028] Figure 8 is a cross-sectional view along line CC in Figure 7;

[0029] Figure 9 is a three-dimensional structural diagram of the electronic device provided in Embodiment 4 of the present invention.

[0030] In the diagram, 100 is the button motor; 1 is the outer casing; 11 is the side casing; 12 is the connecting casing; 2 is the vibrator assembly; 21 is the magnet; 22 is the first pole core; 3 is the stator assembly; 31 is the second pole core; 32 is the iron core; 33 is the coil; 4 is the button; 41 is the button body; 42 is the pressure section; 5 is the Hall sensor; 6 is the flexible circuit board; 61 is the flexible circuit board body; 62 is the first extension; 63 is the second extension; 7 is the non-metallic elastic element; and 8 is the connector. 200 is the electronic component; 201 is the outer frame; and 202 is the receiving slot. Embodiments of the present invention

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Referring to Figures 1 to 4, where the Z-axis represents the first direction, the X-axis represents the second direction, and the Y-axis represents the third direction, this embodiment of the invention provides a button motor 100. The button motor 100 includes a hollow housing 1 with an opening, a stator assembly 2 fixed to opposite sides of the housing 1, an oscillator assembly 3 elastically supported at opposite ends of the housing 1, and a button 4 fixed to the oscillator assembly 3 and covered by the opening of the housing 1. The stator assembly 2 drives the oscillator assembly 3 to move along the first direction. The stator assembly 2 is disposed on the oscillator assembly... 3. The stator assembly 3 is located on opposite sides along the second direction and spaced apart from the oscillator assembly 3; the second direction is perpendicular to the first direction; the oscillator assembly 3 includes a magnet 21 and first pole cores 22 stacked and fixed on opposite sides of the magnet 21 along the first direction, and the button 4 is fixed to one of the first pole cores 22 on the side away from the magnet 21; the stator assembly 2 includes two second pole cores 31 fixed on opposite sides of the outer casing 1 along the second direction, an iron core 32 fixed to the second pole core 31, and coils 33 wound around the iron core 32;

[0034] The button motor 100 also includes a Hall sensor 5, which is fixed to the second electrode core 31 and spaced apart from the outer periphery of the coil 33. The Hall sensor 5 is used to detect the pressing action of the button 4, including the pressing force, pressing position, etc., such as light pressing, heavy pressing, and sliding.

[0035] Specifically, by fixing the Hall sensor 5 in the second electrode core 31, the Hall sensor 5 is integrated with the stator assembly 2 without occupying additional thickness space.

[0036] In this embodiment, the outer casing 1 includes two side shells 11 that are arranged opposite to each other and spaced apart along the second direction, and two connecting shells 12 that connect the two side shells 11 to opposite ends along the third direction; the second pole core 31 and the coil 33 are respectively fixed to the side shells 11 that are close to each other.

[0037] In this embodiment, the button 4 includes a button body 41 and a pressure portion 42 extending from the button body 41 toward the magnet 21. The pressure portion 42 extends to and abuts against the first pole core 22, thereby making the oscillator assembly 3 more stable and improving the performance of the button motor 100. The pressure portion 42 includes two oppositely disposed on the first pole core 22 along a second direction, so that when the button body 41 is subjected to pressure, the force transmitted to the first pole core 22 by the pressure portion 42 is more uniform.

[0038] In this embodiment, the Hall sensor 5 includes two sensors. The two Hall sensors 5 are respectively fixed to the sides of the two second electrode cores 31 that are close to each other, and the two Hall sensors 5 are arranged opposite each other along a third direction on opposite sides of the oscillator assembly 2. The third direction, the second direction, and the first direction are mutually perpendicular. Specifically, by placing the two Hall sensors 5 at both ends of the button motor 100, when a sliding operation is performed, the oscillator assembly 3 undergoes a displacement change along the third direction, and the data detected by the two Hall sensors 5 are different and change in real time, thereby meeting the inspection needs of different application scenarios and effectively improving the performance of the button motor 100.

[0039] In this embodiment, the button motor 100 further includes two flexible circuit boards 6; one end of each of the two flexible circuit boards 6 is fixed to the second pole core 31 of the two stator assemblies 2 and is electrically connected to the Hall sensor 5 and the coil 33 respectively, and the other end of each flexible circuit board 6 extends outside the housing 1. Specifically, since the Hall sensor 5 and the coil 33 share the same flexible circuit board 6, the number of parts is simplified, and the cost of the button motor 100 is reduced.

[0040] In this embodiment, the flexible circuit board 6 includes a flexible circuit board body 61 and a first extension 62 formed by extending the flexible circuit board body 61 away from the stator assembly 2. The flexible circuit board body 61 is fixed to the second pole core 31 and spaced apart from the coil 33. The flexible circuit board body 61 is electrically connected to the Hall sensor 5 and the coil 33, respectively. Specifically, because the flexible circuit board body 61 is spaced apart from the coil 33, it is not necessary to increase the width of the button motor 100, effectively improving the applicability of the button motor 100.

[0041] In this embodiment, the button motor 100 further includes two non-metallic elastic members 7 respectively fixed to opposite ends of the housing 1. The non-metallic elastic members 7 are capable of deformation along the first direction. The two non-metallic elastic members 7 are also fixedly connected to the vibrator assembly 3, elastically supporting the vibrator assembly 3 within the housing 1. The non-metallic elastic members 7 are fixed to the connecting housing 12. This makes the vibrator assembly 3 more stable and improves the performance of the button motor 100.

[0042] In this embodiment, the button motor 100 further includes a connector 8, one end of which is fixedly connected to the non-metallic elastic member 7, and the other end is fixedly connected to the vibrator assembly 3. This makes the vibrator assembly 3 more stable and improves the performance of the button motor 100.

[0043] Compared with the prior art, the Hall sensor in the button motor of the present invention is fixed to the stator assembly and integrated with the stator assembly, thus achieving ultra-thinness without occupying additional thickness space; at the same time, since the vibrator assembly is a magnet, when the vibrator is displaced, the Hall sensor can directly detect the change in the B value of the magnet in the vibrator assembly, without the need to add an additional magnet; the sensing includes two Hall sensors respectively fixed to two stator assemblies, and the two Hall sensors are arranged opposite each other along a third direction, so that the data changes can be detected by the Hall sensors, and the pressing action can be more accurately determined.

[0044] Example 2

[0045] The structure of the button motor 100 in Embodiment 2 is basically the same as that in Embodiment 1. The difference is that the flexible circuit board 6 further includes a second extension 63 formed by the flexible circuit board body 61 extending towards the stator assembly 2, and the coil 33 and the iron core 32 are fixed to the second extension 63.

[0046] Specifically, please refer to Figures 5 and 6. Figure 5 is a three-dimensional structural diagram of the button motor provided in Embodiment 2 of the present invention, and Figure 6 is a cross-sectional view along line BB in Figure 5. The first extension 62 of the flexible circuit board 6 can be formed by extending the flexible circuit board body 61 or the second extension 63 outward, so that the two flexible circuit boards 6 can be led out from the same side of the button motor 100 according to the actual situation, thereby adapting to different application scenarios and improving the applicability of the button motor 100 without increasing the extra width.

[0047] Example 3

[0048] The structure of the button motor 100 in Embodiment 3 is basically the same as that in Embodiment 1, except that the Hall sensor 5 and the iron core 32 are spaced apart, and the coil 33 is spaced around the Hall sensor 5 and the iron core 32.

[0049] Specifically, please refer to Figures 7 and 8. Figure 7 is a three-dimensional structural schematic diagram of the button motor provided in Embodiment 3 of the present invention, and Figure 8 is a cross-sectional view along line CC in Figure 7. By placing the Hall sensor 5 and the iron core 32 inside the coil 33, more space can be saved, thereby improving the performance of the button motor 100.

[0050] Example 4

[0051] Please refer to Figure 9, which is a three-dimensional structural diagram of the electronic device provided in Embodiment 4 of the present invention. The present invention provides an electronic device 200, which includes an outer frame 201 and a button motor 100 as described in any of the above embodiments, fixed within the outer frame 201. The outer side of the outer frame 201 is provided with an inwardly recessed receiving groove 202, the outer shell 1 is fixed within the receiving groove 202, and a portion of the button 4 is received within the receiving groove 202 and fixedly connected to the vibrator assembly 3. The electronic device 200 can be a mobile phone, AR device, headset, gamepad, steering wheel, or tablet device requiring button operation.

[0052] Since the electronic device 200 in this embodiment includes the button motor 100 in the first embodiment above, it can also achieve the technical effect achieved by the button motor 100 in the first embodiment above, which will not be described in detail here.

[0053] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A button motor, the button motor comprising a hollow housing with an opening, a stator assembly fixed to opposite sides of the housing, an oscillator assembly elastically supported at opposite ends of the housing, and a button fixed to the oscillator assembly and covered by the opening of the housing; the stator assembly drives the oscillator assembly to move along a first direction; the stator assembly is disposed on opposite sides of the oscillator assembly along a second direction and spaced apart from the oscillator assembly; the second direction is perpendicular to the first direction; the oscillator assembly includes a magnet and first pole cores stacked and fixed to opposite sides of the magnet along the first direction, the button being fixed to one of the first pole cores on the side away from the magnet; the stator assembly includes two second pole cores fixed to opposite sides of the housing along the second direction, an iron core fixed to the second pole cores, and coils wound around the iron core; characterized in that, The button motor also includes a Hall sensor for detecting the pressing action of the button, and the Hall sensor is fixed to the second electrode core.

2. The button motor as described in claim 1, characterized in that, The Hall sensor is spaced apart from the outer periphery of the coil.

3. The button motor as described in claim 1, characterized in that, The Hall sensor is spaced apart from the iron core, and the coil is spaced around the Hall sensor and the iron core.

4. The button motor as described in claim 1, characterized in that, The Hall sensor includes two Hall sensors, which are respectively fixed on the side of the two second pole cores that are close to each other, and the two Hall sensors are arranged opposite each other on opposite sides of the oscillator assembly along a third direction, wherein the third direction, the second direction and the first direction are perpendicular to each other.

5. The button motor as described in claim 4, characterized in that, The button motor also includes two flexible circuit boards; one end of each of the two flexible circuit boards is fixed to the second pole core of the two stator assemblies and is electrically connected to the Hall sensor and the coil respectively, and the other end of each flexible circuit board extends out of the housing.

6. The button motor as described in claim 5, characterized in that, The flexible circuit board includes a flexible circuit board body and a first extension formed by the flexible circuit board body extending away from the stator assembly. The flexible circuit board body is fixed to the second pole core and spaced apart from the coil. The flexible circuit board body is electrically connected to the Hall sensor and the coil, respectively.

7. The button motor as described in claim 6, characterized in that, The flexible circuit board further includes a second extension formed by the flexible circuit board body extending toward the stator assembly, and the coil and the iron core are fixed to the second extension.

8. The button motor as described in claim 4, characterized in that, The button motor also includes two non-metallic elastic elements fixed to opposite ends of the housing. The non-metallic elastic elements are capable of deformation along the first direction. The two non-metallic elastic elements are also fixedly connected to the vibrator assembly and elastically support the vibrator assembly within the housing.

9. The button motor as described in claim 8, characterized in that, The outer casing includes two side shells that are opposite to each other and spaced apart along the second direction, and two connecting shells that connect the two side shells to opposite ends along the third direction; the second pole core and the coil are respectively fixed to the side shells that are close to each other, and the non-metallic elastic element is fixed to the connecting shell.

10. The button motor as described in claim 8, characterized in that, The button motor also includes a connector, one end of which is fixedly connected to the non-metallic elastic element, and the other end of which is fixedly connected to the vibrator assembly.

11. The button motor as described in claim 1, characterized in that, The button includes a button body and a pressure portion extending from the button body toward the magnet, the pressure portion extending to the first pole core and abutting against the first pole core.

12. An electronic device, characterized in that, The electronic device includes an outer frame and a button motor as described in claim 1, which is fixed within the outer frame; the outer side of the outer frame is provided with an inwardly recessed receiving groove, the outer shell is fixed within the receiving groove, and a portion of the button structure is received within the receiving groove and fixedly connected to the vibrator assembly.

Images