Key motor and electronic device
By designing a hollow shell and a button motor integrating Hall sensor, the problems of increased thickness and insufficient induction in the prior art are solved, ultra-thinning and high induction are achieved, and the pressing action can be accurately judged.
Patent Information
- Application Number
- CN202510357517.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-06-24
AI Technical Summary
The thickness of the existing button motor increases when induction of the press signal, making it difficult to accurately judge the pressing action as a light press, heavy press and slide, which cannot meet the needs of modern electronic devices for high induction and ultra-thinization.
A key motor with a hollow shell is designed. The stator assembly drives the movement of the oscillator assembly, and the Hall sensor is fixed to the stator assembly. The magnet in the oscillator assembly detects the pressing action to achieve ultra-thinning and high induction.
It realizes ultra-thin and high induction of the button motor, and can accurately judge the pressing action, meeting the high induction and thin needs of modern electronic devices.
Smart Images
Figure CN120200441A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of buttons, and in particular, to a button motor and an electronic device. Background Art
[0002] In modern electronic devices, a button motor accurately realizes detection by sensing the position and pressing force of a pressed button, so as to achieve the effect of precise control, and provides intuitive and precise tactile feedback for users. It is widely used in electronic devices such as smart phones, tablet computers, and home appliances.
[0003] However, in the related art, since a Hall sensor is required to sense the pressing signal in the button motor, the Hall sensor will additionally occupy the thickness space of the button motor, increasing the thickness of the button motor; at the same time, due to different pressing actions, different pressing states will be presented. It is difficult for the button motor in the related art to accurately judge whether the pressing action is a light press, a heavy press, or a slide, and it is difficult to meet the requirements of modern electronic devices for high sensitivity and ultra-thinness of the pressing signal.
[0004] Therefore, it is necessary to provide a new button motor and an electronic device to solve the above technical problems. Summary of the Invention
[0005] The purpose of the present invention is to provide a button motor and an electronic device, aiming to solve the requirements for high sensitivity and ultra-thinness of the pressing signal of the button motor.
[0006] To achieve the above purpose, the present invention provides a button motor. The button motor includes a hollow shell with an opening, a stator assembly fixed on opposite sides of the shell, an oscillator assembly whose two ends are elastically supported on opposite ends of the shell respectively, and a button fixed to the oscillator assembly by covering and fixing the opening end of the shell. The stator assembly drives the oscillator assembly to move in a first direction; the stator assembly is arranged on opposite sides of the oscillator assembly in a second direction and is spaced from the oscillator assembly; the second direction is perpendicular to the first direction; the oscillator assembly includes a magnet and first pole cores respectively stacked and fixed on opposite sides of the magnet in the first direction, and the button is fixed on one side of the first pole core away from the magnet; the stator assembly includes two second pole cores respectively fixed on opposite sides of the shell in the second direction, an iron core fixed to the second pole cores, and coils respectively wound around the iron cores.
[0007] The button motor further includes a Hall sensor for detecting the pressing action received by the button, and the Hall sensor is fixed to the second pole core.
[0008] Preferably, the Hall sensor is spaced from the outer peripheral side of the coil.
[0009] Preferably, the Hall sensor is arranged at an interval from the iron core, and the coil is arranged around the Hall sensor and the iron core at intervals.
[0010] Preferably, there are two Hall sensors, and the two Hall sensors are respectively fixed on one side of the two second pole cores close to each other, and the two Hall sensors are arranged on opposite sides of the oscillator assembly along a third direction, and the third direction, the second direction and the first direction are perpendicular to each other in pairs.
[0011] Preferably, the key motor further includes two flexible circuit boards; one ends of the two flexible circuit boards are respectively fixed on the second pole cores of the two stator assemblies and are respectively electrically connected to the Hall sensor and the coil, and the other ends of the flexible circuit boards extend outside the housing.
[0012] Preferably, the flexible circuit board includes a flexible circuit board body and a first extension portion formed by extending the flexible circuit board body away from the stator assembly. The flexible circuit board body is fixed on the second pole core and is arranged at an interval from the coil, and the flexible circuit board body is respectively electrically connected to the Hall sensor and the coil.
[0013] Preferably, the flexible circuit board further includes a second extension portion formed by extending the flexible circuit board body towards the stator assembly, and the coil and the iron core are fixed on the second extension portion.
[0014] Preferably, the key motor further includes two non-metallic elastic members respectively fixed at opposite ends of the housing. The non-metallic elastic members can be deformed along the first direction, and the two non-metallic elastic members are respectively fixedly connected to the oscillator assembly and elastically support the oscillator assembly in the housing.
[0015] Preferably, the housing includes two side shells arranged opposite to each other and at intervals along the second direction and two connecting shells respectively connecting opposite ends of the two side shells along the third direction; the second pole core and the coil are respectively fixed on one side of the side shells close to each other, and the non-metallic elastic members are fixed on the connecting shells.
[0016] Preferably, the key motor further includes a connecting member, one end of the connecting member is fixedly connected to the non-metallic elastic member, and the other end is fixedly connected to the oscillator assembly.
[0017] Preferably, the key includes a key body and a pressure portion extending from the key body towards the magnet. The pressure portion extends to the first pole core and abuts against the first pole core.
[0018] Second aspect, the present invention further provides an electronic device, which includes an outer frame and a key motor as described in any one of the above embodiments fixed within the outer frame; a receiving groove recessed inward is provided on the outer side of the outer frame, the housing is fixed within the receiving groove, and a partial structure of the key is received within the receiving groove and fixedly connected to the oscillator assembly.
[0019] Compared with the prior art, the Hall sensor in the key motor of the present invention is fixed to the stator assembly and integrated with the stator assembly, without additionally occupying thickness space to achieve ultra-thinness; at the same time, since the oscillator assembly is a permanent magnet, when the oscillator generates displacement, the Hall sensor can directly detect the change in the B value of the permanent magnet in the oscillator assembly, without the need to additionally increase a permanent magnet; the Hall sensor includes two respectively fixed to two stator assemblies, and the two Hall sensors are arranged opposite to each other along the third direction, so as to be able to detect data changes through the Hall sensor and more accurately determine the pressing action. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:
[0021] Figure 1 It is a three-dimensional structure schematic diagram of the key motor provided in the first embodiment of the present invention;
[0022] Figure 2 It is a three-dimensional structure exploded schematic diagram of the key motor provided in the first embodiment of the present invention;
[0023] Figure 3 It is a three-dimensional structure schematic diagram of the key motor provided in the first embodiment of the present invention;
[0024] Figure 4 It is a sectional view along Figure 3 the A-A line in
[0025] Figure 5 It is a three-dimensional structure schematic diagram of the key motor provided in the second embodiment of the present invention;
[0026] Figure 6 It is a sectional view along Figure 5 the B-B line in
[0027] Figure 7 It is a three-dimensional structure schematic diagram of the key motor provided in the third embodiment of the present invention;
[0028] Figure 8 It is a sectional view along Figure 7 the C-C line in
[0029] Figure 9 This is a three-dimensional structural schematic diagram of the electronic device provided in the fourth embodiment of the present invention.
[0030] In the figure, 100 is a key motor, 1 is a housing, 11 is a side housing, 12 is a connecting housing, 2 is an oscillator assembly, 21 is a magnet, 22 is a first pole core, 3 is a stator assembly, 31 is a second pole core, 32 is an iron core, 33 is a coil, 4 is a key, 41 is a key body, 42 is a pressure part, 5 is a Hall sensor, 6 is a flexible circuit board, 61 is a flexible circuit board body, 62 is a first extension part, 63 is a second extension part, 7 is a non-metallic elastic part, 8 is a connecting part. 200 is an electronic device, 201 is an outer frame, 202 is a receiving groove. Specific embodiments
[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0032] Embodiment 1
[0033] Combined with Figures 1 to 4 As shown in the figure, the Z-axis in the figure represents the first direction, the X-axis represents the second direction, and the Y-axis represents the third direction. The embodiment of the present invention provides a key motor 100, and the key motor 100 includes a housing 1 that is hollow and has an opening, a stator assembly 2 fixed on opposite sides of the housing 1, an oscillator assembly 3 whose two ends are elastically supported on opposite ends of the housing 1, and a key 4 that is fixedly covered by the opening end of the housing 1 on the oscillator assembly 3. The stator assembly 2 drives the oscillator assembly 3 to move along the first direction; the stator assembly 2 is arranged on opposite sides of the oscillator assembly 3 along the second direction and is 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 that are stacked and fixed on opposite sides of the magnet 21 along the first direction respectively, and the key 4 is fixed on one side of one of the first pole cores 22 away from the magnet 21; the stator assembly 2 includes two second pole cores 31 respectively fixed on opposite sides of the housing 1 along the second direction, an iron core 32 fixed on the second pole cores 31, and coils 33 respectively wound around the iron core 32;
[0034] The key motor 100 further includes a Hall sensor 5. The Hall sensor 5 is fixed to the second pole core 31 and is disposed at an interval from the outer peripheral side of the coil 33. The Hall sensor 5 is used to detect the pressing action applied to the key 4. The pressing action includes the pressing force, the pressing position, etc., such as a light press, a heavy press, and a slide.
[0035] Specifically, by fixing the Hall sensor 5 in the second pole core 31, the Hall sensor 5 is integrated with the stator assembly 2, without additionally occupying thickness space.
[0036] In this embodiment, the housing 1 includes two side housings 11 that are opposite and spaced apart along the second direction, and two connecting housings 12 that are respectively connected to opposite ends of the two side housings 11 along the third direction. The second pole core 31 and the coil 33 are respectively fixed to one side of the side housings 11 close to each other.
[0037] In this embodiment, the key 4 includes a key body 41 and a pressure portion 42 that extends from the key body 41 in the direction close to the magnet 21. The pressure portion 42 extends to the first pole core 22 and abuts against the first pole core 22, so that the oscillator assembly 3 is more stable and the performance of the key motor 100 is improved. Among them, the pressure portion 42 includes two that are oppositely arranged along the second direction of the first pole core 22, so that when the key 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, there are two Hall sensors 5. The two Hall sensors 5 are respectively fixed to one side of the two second pole cores 31 close to each other, and the two Hall sensors 5 are oppositely arranged on opposite sides of the oscillator assembly 2 along the third direction. The third direction, the second direction, and the first direction are perpendicular to each other in pairs. Specifically, by respectively arranging the two Hall sensors 5 at both ends of the key 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, so as to meet the inspection requirements of different application scenarios and effectively improve the performance of the key motor 100.
[0039] In this embodiment, the key motor 100 further includes two flexible circuit boards 6. One ends of the two flexible circuit boards 6 are respectively fixed to the second pole cores 31 of the two stator assemblies 2 and are respectively electrically connected to the Hall sensor 5 and the coil 33. The other ends of the flexible circuit boards 6 extend 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 key motor 100 is reduced.
[0040] In this embodiment, the flexible circuit board 6 includes a flexible circuit board body 61 and a first extension portion 62 extending from the flexible circuit board body 61 in a direction away from the stator assembly 2. The flexible circuit board body 61 is fixed to the second pole core 31 and is disposed at an interval from the coil 33. The flexible circuit board body 61 is electrically connected to the Hall sensor 5 and the coil 33 respectively. Specifically, since the flexible circuit board body 61 is disposed at an interval from the coil 33, it is not necessary to additionally increase the width of the key motor 100, effectively improving the applicable range of the key motor 100.
[0041] In this embodiment, the key 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 can be deformed along the first direction. The two non-metallic elastic members 7 are also respectively fixedly connected to the oscillator assembly 3 and elastically support the oscillator assembly 3 in the housing 1. The non-metallic elastic members 7 are fixed to the connection housing 12. Thereby making the oscillator assembly 3 more stable and improving the performance of the key motor 100.
[0042] In this embodiment, the key motor 100 further includes a connecting member 8. One end of the connecting member 8 is fixedly connected to the non-metallic elastic member 7, and the other end is fixedly connected to the oscillator assembly 3. Thereby making the oscillator assembly 3 more stable and improving the performance of the key motor 100.
[0043] Compared with the prior art, the Hall sensor in the key motor of the present invention is fixed to the stator assembly and integrated with the stator assembly, without additionally occupying the thickness space to achieve ultra-thinness; at the same time, since the oscillator assembly is a permanent magnet, when the oscillator generates displacement, the Hall sensor can directly detect the change in the B value of the permanent magnet in the oscillator assembly, without additionally increasing the permanent magnet; the sensors include two respectively fixed to the two stator assemblies, and the two Hall sensors are disposed opposite to each other along the third direction, so that the change in data can be detected by the Hall sensors, and the pressing action can be judged more accurately.
[0044] Embodiment 2
[0045] The structure of the key motor 100 in Embodiment 2 is basically the same as that in Embodiment 1, and the difference lies in that: the flexible circuit board 6 further includes a second extension portion 63 extending from the flexible circuit board body 61 in a direction close to the stator assembly 2, and the coil 33 and the iron core 32 are fixed to the second extension portion 63.
[0046] Specifically, please refer to Figures 5 - 6 , Figure 5 which is a three-dimensional structural schematic diagram of the key motor provided in Embodiment 2 of the present invention.Figure 6 is a sectional view along Figure 5 the B-B line in the figure. The first extension 62 of the flexible circuit board 6 can be extended outward from the flexible circuit board body 61 or the second extension 63, so that the two flexible circuit boards 6 can be led out from the same side of the key motor 100 according to the actual situation, thus adapting to different application scenarios and improving the applicable range of the key motor 100 without increasing the extra width.
[0047] Embodiment III
[0048] The structure of the key motor 100 in Embodiment III is basically the same as that in Embodiment I, and the difference lies in that: the Hall sensor 5 and the iron core 32 are arranged at intervals, and the coil 33 is wound around the Hall sensor 5 and the iron core 32 at intervals.
[0049] Specifically, please refer to Figures 7 - 8 , Figure 7 which is a three-dimensional structure schematic diagram of the key motor provided in Embodiment III of the present invention, Figure 8 is a sectional view along Figure 7 the C-C line in the figure. Since the Hall sensor 5 and the iron core 32 are arranged in the coil 33, more space can be saved, thereby improving the performance of the key motor 100.
[0050] Embodiment IV
[0051] Please refer to Figure 9 , Figure 9 which is a three-dimensional structure schematic diagram of the electronic device provided in Embodiment IV of the present invention. The present invention provides an electronic device 200, and the electronic device 200 includes an outer frame 201 and a key motor 100 as described in any one of the above embodiments fixed in the outer frame 201; an inwardly concave receiving groove 202 is provided on the outer side of the outer frame 201, the housing 1 is fixed in the receiving groove 202, and a part of the structure of the key 4 is received in the receiving groove 202 and fixedly connected to the oscillator assembly 3. The electronic device 200 can be a device in a key operation scenario of a mobile phone, AR, earphone, handle, steering wheel, and tablet.
[0052] Since the electronic device 200 in this embodiment includes the key motor 100 in Embodiment I of the above, it can also achieve the technical effects achieved by the key motor 100 in Embodiment I of the above, and will not be elaborated here.
[0053] The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the protection scope of the present invention.
Claims
1. A key motor, the key motor comprising a hollow shell with an opening, a stator assembly fixed to opposite sides of the shell, a vibrator assembly with two ends elastically supported at opposite ends of the shell, and a key fixed to the vibrator assembly by the open end cover of the shell; the stator assembly drives the vibrator assembly to move in a first direction; the stator assembly is arranged on opposite sides of the vibrator assembly along a second direction and is spaced apart from the vibrator assembly; the second direction is perpendicular to the first direction; the vibrator assembly comprises a magnetic steel and first pole cores respectively stacked and fixed to opposite sides of the magnetic steel along the first direction, the key is fixed to one side of the first pole core away from the magnetic steel; the stator assembly comprises two second pole cores respectively fixed to opposite sides of the shell along the second direction, an iron core fixed to the second pole core, and coils respectively wound around the iron core; characterized in that The key motor further includes a Hall sensor for detecting a pressing action on the key, and the Hall sensor is fixed to the second pole core.
2. The key motor according to claim 1, characterized in that: The Hall sensor is disposed at a distance from the outer circumference of the coil.
3. The key motor according to claim 1, characterized in that: The Hall sensor and the iron core are spaced apart, and the coil surrounds the Hall sensor and the iron core at intervals.
4. The key motor according to claim 1, characterized in that: The two Hall sensors are respectively fixed on one side of the two second pole cores close to each other, and the two Hall sensors are relatively arranged on the opposite sides of the vibrator assembly along a third direction, and the third direction, the second direction and the first direction are perpendicular to each other.
5. The key motor according to claim 4, characterized in that: The key motor also includes two flexible circuit boards; one end of the two flexible circuit boards is respectively fixed to the second pole cores of the two stator assemblies and is respectively electrically connected to the Hall sensor and the coil, and the other end of the flexible circuit boards extends outside the housing.
6. The key motor according to claim 5, characterized in that: The flexible circuit board includes a flexible circuit board body and a first extension portion 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 key motor according to claim 6, characterized in that: The flexible circuit board further includes a second extension portion which is formed by extending the flexible circuit board body toward the stator assembly, and the coil and the iron core are fixed to the second extension portion.
8. The key motor according to claim 4, characterized in that: The key motor also includes two non-metallic elastic parts respectively fixed at the opposite ends of the shell, and the non-metallic elastic parts can be deformed along the first direction. The two non-metallic elastic parts are also respectively fixedly connected with the vibrator assembly and elastically support the vibrator assembly in the shell.
9. The key motor according to claim 8, characterized in that: The shell includes two side shells that are opposite and spaced apart along the second direction and two connecting shells that respectively connect the two side shells at opposite ends along the third direction; the second pole core and the coil are respectively fixed to the side of the side shells that are close to each other, and the non-metallic elastic part is fixed to the connecting shell.
10. The key motor according to claim 8, characterized in that: The key motor also includes a connecting piece, one end of which is fixedly connected to the non-metallic elastic piece, and the other end of which is fixedly connected to the vibrator assembly.
11. The key motor according to claim 1, characterized in that: The button includes a button body and a pressure portion extending from the button body toward the magnetic steel, and the pressure portion extends to the first pole core and abuts against the first pole core.
12. An electronic device, characterized in that: The electronic device includes an outer frame and a key motor as described in claim 1 fixed in the outer frame; an inwardly recessed receiving groove is provided on the outer side of the outer frame, the outer shell is fixed in the receiving groove, and a partial structure of the key is received in the receiving groove and fixedly connected to the vibrator assembly.