Vibration motor and touch device

Abstract

A vibration motor, comprising a housing having an accommodating space, a stator fixedly arranged in the housing, and a vibrator fixed to the housing, wherein the stator comprises a pair of magnetic elements which are opposite to each other in a first direction and are spaced apart from each other; the vibrator comprises a spring leaf and a solenoid; two ends of the spring leaf in a second direction are fixed to the housing; the solenoid is fixedly connected to the spring leaf so as to be suspended between the two magnetic elements; the two magnetic elements drive the solenoid to vibrate in a third direction; an opening communicated with the accommodating space is formed on at least one side of the housing in the third direction; the first direction, the second direction, and the third direction are perpendicular to each other. The present invention further provides a touch device comprising the vibration motor. According to the vibration motor, after machine assembly, the driving force of the vibrator at different positions changes little, thereby avoiding experience differences caused by changes in assembly tolerances and thus ensuring consistency of the whole machine.

Description

Vibration motor and touch device Technical Field

[0001] The present invention relates to the field of vibration feedback technology, and in particular to a vibration motor and a touch control device. Background Art

[0002] Vibration feedback technology can reproduce the feeling of touch for users through a series of actions such as force and vibration. This mechanical stimulation is applied to touch devices.

[0003] The vibration feedback technology in the related art is to apply static pressure (usually by pressing the finger to generate static pressure) to cause the spring of the vibration motor to displace in the direction of the static pressure. When the sensor detects the static pressure information, the vibration motor works to generate a tactile sensation, thereby generating a simulated vibration experience. Specifically, the spring of the vibration motor undergoes deformation and reverse process under the action of an external force (such as finger pressure), so that the user feels the pressure feedback. However, when assembling the whole machine, the vibration motor in the related art needs to fix the motor housing to the middle frame of the touch device and the vibrator of the motor to the button provided on the middle frame. This assembly method will cause the position of the vibrator to be uncontrollable and relatively random. Therefore, due to changes in assembly tolerances, the driving force of the vibrator at different positions will vary greatly, resulting in differences in the vibration experience.

[0004] Therefore, it is necessary to study a vibration motor with a new structure. Summary of the Invention

[0005] The present invention aims to solve the problem that the driving force of a vibrator at different positions varies greatly due to variations in assembly tolerances during assembly of a vibration motor, and provides a vibration motor with a novel structure.

[0006] To achieve the above-mentioned objectives, the present invention provides a vibration motor, comprising a housing having a receiving space, a stator fixed in the housing, and a vibrator fixed to the housing, wherein the stator comprises a pair of magnetic elements arranged opposite to and spaced apart in a first direction, and the vibrator comprises a spring sheet and a solenoid, wherein both ends of the spring sheet along a second direction are fixed to the housing, and the solenoid is fixedly connected to the spring sheet so as to be suspended between the two magnetic elements, and the two magnetic elements drive the solenoid to vibrate along a third direction, and the housing has an opening connected to the receiving space on at least one side along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] As an improvement, the magnetic element is a magnetic steel, and the magnetic element is magnetized along the first direction.

[0008] As an improvement, each of the magnetic elements is magnetized in three sections to form a first magnetic section, a second magnetic section and a third magnetic section sequentially distributed along the third direction, wherein:

[0009] The two first magnetic segments of the two magnetic elements are opposite to each other with the same poles, the two second magnetic segments of the two magnetic elements are opposite to each other with the same poles, and the two third magnetic segments of the two magnetic elements are opposite to each other with the same poles;

[0010] In the same magnetic element, the magnetization direction of the first magnetic segment is opposite to the magnetization direction of the second magnetic segment;

[0011] In the same magnetic element, the magnetization direction of the first magnetic segment is the same as the magnetization direction of the third magnetic segment.

[0012] As an improvement, each of the magnetic elements is a unipolar magnet, and the two magnetic elements are opposed to each other with the same poles.

[0013] As an improvement, each of the magnetic elements includes a first magnetic steel, a second magnetic steel, and a third magnetic steel sequentially distributed along the third direction, and the first magnetic steel, the second magnetic steel, and the third magnetic steel are all magnetized along the first direction, wherein,

[0014] The two first magnetic steels of the two magnetic elements have the same poles facing each other, the two second magnetic steels of the two magnetic elements have the same poles facing each other, and the two third magnetic steels of the two magnetic elements have the same poles facing each other;

[0015] In the same magnetic element, the magnetization direction of the first magnetic steel is opposite to the magnetization direction of the second magnetic steel;

[0016] In the same magnetic element, the magnetization direction of the first magnetic steel is the same as the magnetization direction of the third magnetic steel.

[0017] As an improvement, the solenoid includes a coil and a core, wherein the core includes a main body portion wound by the coil and an extension portion extending from the main body portion and fixedly connected to the spring sheet.

[0018] As an improvement, the orthographic projection of the coil on the magnetic element falls within the range of the magnetic element.

[0019] As an improvement, at least two spaced-apart positioning posts are formed on a side of the extension portion away from the main body portion and extending along the third direction, and a through hole for inserting the positioning posts is provided on the spring sheet.

[0020] As an improvement, the shell includes a first wall, a second wall, a third wall and a fourth wall which are connected in sequence from head to tail to enclose the receiving space, the two ends of the spring sheet are respectively fixed on the first wall and the third wall, and the inner side of the second wall and the inner side of the fourth wall are both fixed with the magnetic element.

[0021] As an improvement, the spring piece is located at the opening, and a buffer piece is fixedly provided on a side of the spring piece facing away from the housing.

[0022] To achieve the above-mentioned objectives, the present invention provides a touch device, comprising a middle frame having a mounting hole and a button installed in the mounting hole, the touch device also comprising a vibration motor as described in any one of the above-mentioned embodiments, the outer shell of the vibration motor being fixed to the inner side of the middle frame, the vibrator of the vibration motor being connected to the button through the opening, and the pressing force direction of the button being parallel to the third direction of the vibration motor.

[0023] The present invention has the following beneficial effects: the stator includes a pair of magnetic elements arranged opposite and spaced apart in a first direction; the vibrator includes a spring sheet and a solenoid; the spring sheet is fixed to the housing at both ends in a second direction; the solenoid is fixedly connected to the spring sheet and suspended between the two magnetic elements; the two magnetic elements drive the solenoid to vibrate in a third direction; at least one side of the housing in the third direction has an opening communicating with the receiving space; the first direction, the second direction, and the third direction are perpendicular to each other. After the vibration motor is assembled, the driving force of the vibrator varies minimally at different positions, thereby avoiding user experience differences caused by variations in assembly tolerances and ensuring consistency across the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a perspective view of a touch device according to a first embodiment of the present invention.

[0025] FIG. 2 is an exploded view of the touch device shown in FIG. 1 .

[0026] FIG. 3 is a perspective view of a vibration motor in the touch device shown in FIG. 2 .

[0027] FIG. 4 is an exploded view of the vibration motor shown in FIG. 3 .

[0028] FIG5 is a partially enlarged cross-sectional view of the touch device shown in FIG1 along the AA direction.

[0029] FIG6 is a partially enlarged cross-sectional view of the touch device shown in FIG1 along line BB.

[0030] FIG7 is a partially enlarged cross-sectional view of the touch device along line BB according to the second embodiment of the present invention.

[0031] FIG8 is a schematic structural diagram of a magnetic element in a touch control device according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to FIG. 1 to FIG. 7 .

[0033] The touch device of the present invention includes but is not limited to mobile phones, AR glasses, car steering wheels, smart controllers, watches and other devices that require key operation. The following is a detailed description using a mobile phone as an example. Example 1

[0034] As shown in Figures 1 to 6, the touch device of the present invention includes a middle frame 1 having a mounting hole 1A, a button 3 mounted in the mounting hole 1A, and a vibration motor 5 fixed to the inner side of the middle frame 1. The button 3 protrudes from the outer side of the middle frame 1 to facilitate a finger applying a pressing force to the button 3. The direction of the pressing force on the button 3 is parallel to the vibration direction of the vibration motor 5.

[0035] As shown in Figures 3 to 6 , the width direction of the vibration motor 5 is defined as a first direction X, the length direction is defined as a second direction Y, and the height direction is defined as a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The vibration direction of the vibration motor 5 is defined as the third direction Z.

[0036] The vibration motor 5 includes a housing 51 having a receiving space 5A, a stator 53 fixed in the housing 51 , and a vibrator 55 fixed to the housing 51 .

[0037] Among them, the shell 51 is fixed to the inner side of the middle frame 1, and the shell 51 has an opening 5B connected to the receiving space 5A on at least one side along the third direction Z so that the vibrator 55 is connected to the button 3 through the opening 5B. The stator 53 drives the vibrator 55 to vibrate along the third direction Z. When the vibrator 55 vibrates, it drives the button 3 to vibrate and produce a tactile sensation, thereby producing a simulated vibration experience.

[0038] In this embodiment, both sides of the housing 51 along the third direction Z have openings 5B communicating with the receiving space 5A.

[0039] As shown in Figures 3 and 4, the shell 51 includes a first wall 511, a second wall 513, a third wall 515 and a fourth wall 517 that are connected end to end in sequence to enclose a receiving space 5A, wherein the first wall 511 and the third wall 515 are opposite to and spaced apart along the second direction Y, the second wall 513 and the fourth wall 517 are opposite to and spaced apart along the first direction X, and the two ends of the shell 51 along the third direction Z are respectively defined to form an opening 5B.

[0040] In this embodiment, the outer shell 51 is fixed to the inner side of the middle frame 1 through the connecting member 7 .

[0041] The connecting member 7 includes a first connecting portion 71 and a second connecting portion 73 connected to the first connecting portion 71 . The first connecting portion 71 is connected to the housing 51 , and the second connecting portion 73 is connected to the middle frame 1 .

[0042] As shown in Figure 5, a first connecting portion 71 of a connecting member 7 is welded to the first wall 511, and a first connecting portion 71 of another connecting member 7 is welded to the third wall 515. The second connecting portion 73 is formed by bending from the first connecting portion 71, and the second connecting portion 73 is connected to the middle frame 1 through fasteners.

[0043] The stator 53 includes a pair of magnetic elements 53A disposed opposite to each other in the first direction X and spaced apart from each other.

[0044] As shown in FIG6 , magnetic elements 53A are fixedly mounted on the inner sides of the second wall 513 and the fourth wall 517 , that is, the stator 53 is fixedly mounted in the housing 51 .

[0045] In this embodiment, the magnetic element 53A is made of magnetic steel, and the magnetic element 53A is magnetized along the first direction X.

[0046] It should be noted that the first direction X includes a positive direction and a negative direction. As shown in FIG6 , the magnetic element 53A is magnetized along the first direction X, that is, the magnetic element 53A is magnetized along its thickness direction.

[0047] In this embodiment, each magnetic element 53A is magnetized in three sections to form a first magnetic section 531 , a second magnetic section 533 and a third magnetic section 535 that are sequentially distributed along the third direction Z.

[0048] It should be noted that three-segment magnetization means that the magnetic element 53A forms three magnetic poles on the surface perpendicular to the first direction X, that is, the first magnetic segment 531, the second magnetic segment 533 and the third magnetic segment 535 all include N poles and S poles distributed along the first direction X.

[0049] Among them, the two first magnetic segments 531 of the two magnetic elements 53A are opposite to each other with the same poles, the two second magnetic segments 533 of the two magnetic elements 53A are opposite to each other with the same poles, and the two third magnetic segments 535 of the two magnetic elements 53A are opposite to each other with the same poles; in the same magnetic element 53A, the magnetization direction of the first magnetic segment 531 is opposite to the magnetization direction of the second magnetic segment 533, and in the same magnetic element 53A, the magnetization direction of the first magnetic segment 531 is the same as the magnetization direction of the third magnetic segment 535.

[0050] It should be noted that the magnetization direction of the first magnetic segment 531 is opposite to the magnetization direction of the second magnetic segment 533, which means that one of the magnetization directions of the first magnetic segment 531 and the second magnetic segment 533 is in the positive direction of the first direction X, and the other is in the negative direction of the first direction X. As shown in FIG6 , along the third direction Z, the magnetic poles of the magnetic element 53A on the side close to the solenoid 553 are distributed in an NSN pattern, and correspondingly, the magnetic poles of the magnetic element 53A on the side away from the solenoid 553 are distributed in an SNS pattern. It is understood that in other embodiments, along the third direction Z, the magnetic poles of the magnetic element 53A on the side close to the solenoid 553 may also be distributed in an SNS pattern, and correspondingly, the magnetic poles of the magnetic element 53A on the side away from the solenoid 553 are distributed in an NSN pattern.

[0051] The vibrator 55 includes a spring piece 551 connected to the button 3 and a solenoid 553. The axis of the solenoid 553 is parallel to the third direction Z.

[0052] The two ends of the spring piece 551 along the second direction Y are fixed to the housing 51 . Specifically, the two ends of the spring piece 551 along the second direction Y are fixed to the first wall 511 and the third wall 515 , respectively.

[0053] The solenoid 553 is fixedly connected to the spring sheet 551 to be suspended between the two magnetic elements 53A. The two magnetic elements 53A drive the solenoid 553 to vibrate along the third direction Z.

[0054] As shown in FIG. 4 , FIG. 5 and FIG. 6 , two opposite sides of the solenoid 553 along the third direction Z are respectively connected to a spring piece 551 .

[0055] The solenoid 553 includes a coil 554 and a core 555. As shown in FIG6 , the orthographic projection of the coil 554 on the magnetic element 53A falls within the range of the magnetic element 53A.

[0056] During normal operation, a finger presses the button 3 to generate pressure along the second direction, which is perpendicular to the surface of the button 3. The spring piece 551 is deformed, and the sensor detects the action information of the pressure through the deformation of the spring piece 551. The action information includes the position information of the pressure and the strength information of the pressure. Through the processor and signal algorithm, a corresponding electrical signal is given to the vibration motor 5. When the vibration motor 5 is energized to allow the coil 554 to pass alternating current, an alternating magnetic field in the third direction Z is generated. The alternating magnetic field in the third direction Z interacts with the magnetic field formed by the two magnetic elements 53A to cause the solenoid 553 to vibrate linearly in the third direction Z. The spring piece 551 provides elastic restoring force during the linear reciprocating vibration process (that is, the vibrator 55 of the vibration motor 5 vibrates along the third direction Z), thereby providing tactile feedback to the user.

[0057] The core 555 includes a main body 556 around which the coil 554 is wound, and an extension portion 557 extending from the main body 556 and fixedly connected to the spring piece 551 .

[0058] In this embodiment, the core 555 is preferably made of an easily magnetizable material so that the magnetism generated by the coil 554 when energized magnetizes the core 555 and enhances the magnetic field strength of the solenoid 553. This allows the current to be reduced while maintaining the same driving force. Typically, the core 555 is an iron core, meaning that the solenoid 553 is an electromagnet.

[0059] In this embodiment, at least two spaced-apart positioning posts 558 are formed on a side of the extension portion 557 that extends away from the main body portion 556 in the third direction Z. The spring piece 551 is provided with through holes 552 for inserting the positioning posts 558. The provision of through holes 552 facilitates positioning of the spring piece 551 and the solenoid during assembly of the vibration motor 5.

[0060] As shown in Figure 5, the button 3 is also provided with a positioning hole 31 for the positioning column 558 to be inserted into. The positioning hole 31 is provided to facilitate positioning of the button 3 and the spring sheet 551 when the vibration motor 5 is assembled to the touch device.

[0061] In this embodiment, the spring piece 551 is located at the opening 5B, and a buffer piece 57 is fixed to the side of the spring piece 551 facing away from the housing 51. The provision of the buffer piece 57 can prevent the spring piece 551 from colliding with the middle frame and / or other components of the touch device during vibration, thereby improving reliability. Example 2

[0062] 7 , the only difference between the second embodiment and the first embodiment is that each magnetic element 53 a is a unipolar magnet, and the two magnetic elements 53 a face each other with the same poles.

[0063] It should be noted that, in other implementations, the magnetic element 53a in Example 2 may also be replaced by a solenoid structure. However, compared to magnets, the solenoid structured magnetic element 53a not only has a smaller driving force, but also has a more complex magnetic circuit structure and driving method. Example 3

[0064] 8 , the only difference between the third embodiment and the first embodiment is that each magnetic element 53B includes a first magnetic steel 536 , a second magnetic steel 537 , and a third magnetic steel 538 sequentially distributed along the third direction Z, and the first magnetic steel 536 , the second magnetic steel 537 , and the third magnetic steel 538 are all magnetized along the first direction X.

[0065] The two first magnetic steels 536 of the two magnetic elements 53B are opposite to each other with the same poles, the two second magnetic steels 537 of the two magnetic elements 53B are opposite to each other with the same poles, and the two third magnetic steels 538 of the two magnetic elements 53B are opposite to each other with the same poles.

[0066] In the same magnetic element 53B, the magnetization direction of the first magnetic steel 536 is opposite to the magnetization direction of the second magnetic steel 537;

[0067] In the same magnetic element 53B, the magnetization direction of the first magnetic steel 536 is the same as the magnetization direction of the third magnetic steel 538 .

[0068] It should be noted that, in other embodiments, the first magnetic steel 536 , the second magnetic steel 537 and the third magnetic steel 538 may also be replaced by solenoid structures.

[0069] It should also be noted that, in other embodiments, the stator may further include two magnetic elements spaced apart along the second direction and magnetized along the second direction, and the four magnetic elements are assembled into a frame-type stator. At the same time, the two magnetic elements spaced apart along the second direction need to avoid the spring sheet to reserve vibration space for the spring sheet. Therefore, the size of the two magnetic elements spaced apart along the second direction in the vibration direction will not be too large, and should be smaller than the size of the two magnetic elements spaced apart along the first direction X in the vibration direction.

[0070] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A vibration motor, comprising a housing having a receiving space, a stator fixed within the housing, and an oscillator fixed to the housing, characterized in that: The stator includes a pair of magnetic elements that are opposite to each other and spaced apart along a first direction, the vibrator includes a spring sheet and a solenoid, the two ends of the spring sheet along a second direction are fixed to the housing, the solenoid is fixedly connected to the spring sheet to be suspended between the two magnetic elements, the two magnetic elements drive the solenoid to vibrate along a third direction, at least one side of the housing along the third direction has an opening connected to the accommodating space, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The vibration motor according to claim 1, wherein: The magnetic element is a magnetic steel, and the magnetic element is magnetized along the first direction.

3. The vibration motor according to claim 2, wherein: Each of the magnetic elements is magnetized in three sections to form a first magnetic section, a second magnetic section and a third magnetic section that are sequentially distributed along the third direction, wherein: The two first magnetic segments of the two magnetic elements are opposite to each other with the same poles, the two second magnetic segments of the two magnetic elements are opposite to each other with the same poles, and the two third magnetic segments of the two magnetic elements are opposite to each other with the same poles; In the same magnetic element, the magnetization direction of the first magnetic segment is opposite to the magnetization direction of the second magnetic segment; In the same magnetic element, the magnetization direction of the first magnetic segment is the same as the magnetization direction of the third magnetic segment.

4. The vibrating motor according to claim 2, wherein: Each of the magnetic elements is a unipolar magnetic steel, and the same poles of the two magnetic elements are opposite to each other.

5. The vibration motor according to claim 1, wherein: Each of the magnetic elements includes a first magnetic steel, a second magnetic steel and a third magnetic steel sequentially distributed along the third direction, and the first magnetic steel, the second magnetic steel and the third magnetic steel are all magnetized along the first direction, wherein: The two first magnetic steels of the two magnetic elements have the same poles facing each other, the two second magnetic steels of the two magnetic elements have the same poles facing each other, and the two third magnetic steels of the two magnetic elements have the same poles facing each other; In the same magnetic element, the magnetization direction of the first magnetic steel is opposite to the magnetization direction of the second magnetic steel; In the same magnetic element, the magnetization direction of the first magnetic steel is the same as the magnetization direction of the third magnetic steel.

6. The vibrating motor according to any one of claims 1-5, characterized in that: The solenoid comprises a coil and a core, wherein the core comprises a main body wound by the coil and an extension portion extending from the main body and fixedly connected to the spring sheet.

7. The vibration motor according to claim 6, wherein: The orthographic projection of the coil on the magnetic element falls within the range of the magnetic element.

8. The vibrating motor according to claim 6, wherein: The extension portion is formed with at least two spaced-apart positioning posts on one side away from the main body portion extending along the third direction, and the spring sheet is provided with through holes for the positioning posts to be inserted into.

9. The vibrating motor according to claim 1, characterized in that: The shell includes a first wall, a second wall, a third wall and a fourth wall which are connected end to end in sequence to enclose the receiving space, the two ends of the spring sheet are respectively fixed to the first wall and the third wall, and the inner side of the second wall and the inner side of the fourth wall are both fixed with the magnetic element.

10. The vibration motor according to claim 1, wherein: The spring sheet is located at the opening, and a buffer sheet is fixedly arranged on a side of the spring sheet facing away from the housing.

11. A touch device, comprising a middle frame having a mounting hole and a button mounted in the mounting hole, characterized in that, The touch device also includes a vibration motor as described in any one of claims 1-10, the housing of the vibration motor is fixed to the inner side of the middle frame, the vibrator of the vibration motor is connected to the button through the opening, and the pressing force direction of the button is parallel to the third direction of the vibration motor.

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