CN108173384B

CN108173384B - Vibration device

Info

Publication number: CN108173384B
Application number: CN201711079442.XA
Authority: CN
Inventors: 胡朝彰; 张哲维
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2016-12-08
Filing date: 2017-11-06
Publication date: 2021-03-23
Anticipated expiration: 2037-11-06
Also published as: CN108173384A; CN207603367U

Abstract

The embodiment of the disclosure provides a vibration device, which comprises a stator, an eccentric wheel and an electromagnetic driving component. The eccentric wheel is used for rotating around a rotating shaft relative to the stator. The electromagnetic driving component comprises at least one magnetic component and an induction coil. At least one magnetic component is arranged on the eccentric wheel. The induction coil corresponds to the magnetic component and is arranged on the stator. When a current is supplied to the induction coil, an electromagnetic driving force is generated by the magnetic component to drive the eccentric wheel to rotate around the rotating shaft, so that the vibration device generates vibration. Wherein, the rotating shaft is arranged on the stator.

Description

Vibration device

Technical Field

The present invention relates to a vibration device, and more particularly, to a vibration device using an induction coil and a magnet to generate an electromagnetic driving force (electromagnetic force) to generate vibration.

Background

With the development of technology, many electronic devices (such as tablet computers or smart phones) have a vibration reminding function. Through the vibration module arranged on the electronic device, when the electronic device executes a specific function, the electronic device can send out vibration to prompt a user, for example, when the electronic device receives information or the user presses a button of the electronic device, the electronic device can send out vibration to prompt the user.

In current vibration modules, vibration is generated by rotating an eccentric assembly with a rotating motor. However, the aforementioned rotating motor is a conventional dc brush motor, so that the thickness of the vibration module cannot be further reduced. Moreover, since the eccentric assembly is disposed outside the rotary motor and connected to the rotary shaft of the rotary motor, the length of the vibration module cannot be further reduced, and thus the vibration module cannot be further reduced in size. In addition, the vibration module composed of the rotating motor and the eccentric component can only generate vibration in a single direction or a single plane.

Therefore, how to design a vibration device capable of providing at least two vibration directions or achieving miniaturization is an important issue worth of discussion and solution.

Disclosure of Invention

In view of the above problems, it is an object of the present invention to provide a vibration device using an electromagnetic driving force to solve the above problems.

The embodiment of the invention discloses a vibration device which comprises a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel is used for rotating around a rotating shaft relative to the stator. The electromagnetic driving component comprises at least one magnetic component and an induction coil. The at least one magnetic component is arranged on the eccentric wheel. The induction coil corresponds to the magnetic assembly and is arranged on the stator. When a current is supplied to the induction coil, an electromagnetic driving force is generated by the magnetic assembly to drive the eccentric wheel to rotate around the rotating shaft, so that the vibration device generates vibration. Wherein, the rotating shaft is arranged on the stator.

In some embodiments, a groove is formed on the eccentric wheel, and the at least one magnetic element is disposed in the groove.

In some embodiments, the magnetic component is a multi-pole magnet.

In some embodiments, the magnetic pole direction of the magnetic assembly is parallel to the direction of the axis of rotation.

In some embodiments, the stator has a disk-shaped structure, and the induction coil corresponds to the magnetic assembly, wherein the induction coil is disposed on an upper surface of the stator, wherein the upper surface faces the eccentric wheel.

In some embodiments, the magnetic pole direction of the magnetic assembly is radially perpendicular to the direction of the axis of rotation.

In some embodiments, the stator has a circular ring structure, the induction coil corresponds to the magnetic assembly, and the induction coil is disposed on an inner surface of the stator.

In some embodiments, the stator has a frame structure having an inner surface, and the induction coil is disposed on the inner surface at a corner of the stator and faces the eccentric wheel.

In some embodiments, the stator has a frame structure having an inner surface, and the induction coil is disposed on the inner surface of the side of the stator and faces the eccentric wheel.

In some embodiments, the vibration device further includes a sensing element disposed on the inner surface.

The invention also discloses a vibration device, which comprises a fixing part and a first vibration device. The first vibration device is arranged in the fixed part and comprises a first moving part, a first elastic component, a first magnetic component and a first induction coil. The first elastic component is connected between the fixed part and the first moving part. The first induction coil corresponds to the first magnetic assembly to generate an electromagnetic driving force to drive the first moving part to move along a first axial direction.

In some embodiments, the vibration device further includes a circuit board disposed on the fixing portion, and the first induction coil is disposed in the circuit board.

In some embodiments, the vibration device further includes an insulating layer and a conductive layer, and the fixing portion includes a metal member, wherein the insulating layer is disposed between the conductive layer and the metal member.

In some embodiments, the vibration device includes a plurality of first induction coils disposed on the fixing portion, a minimum distance and a maximum distance are formed between two adjacent first induction coils, and a width of the first magnetic element in the first axial direction is greater than the minimum distance and less than the maximum distance.

In some embodiments, the vibration device further includes a gel disposed between the first moving member and the first elastic element, between the fixing portion and the first elastic element, or between the first magnetic element and the fixing portion.

In some embodiments, the first moving part is suspended in the fixing part by the first elastic component.

In some embodiments, the vibration device further includes another first elastic component, the two first elastic components are connected to two opposite sides of the first moving component, and the two first elastic components are arranged in opposite directions.

In some embodiments, the vibration device further includes a second vibration module disposed in the fixing portion, the second vibration module including a second moving element, a second magnetic element, and a second induction coil. The second induction coil corresponds to the second magnetic assembly to generate an electromagnetic driving force to drive the second moving part to move along a second axial direction. Wherein the first axis is not parallel to the second axis.

In some embodiments, the first moving part has a first opening, and the second moving part is disposed in the first opening.

In some embodiments, the first moving part and the second moving part are arranged along a third axial direction, and the third axial direction is perpendicular to the first axial direction or the second axial direction.

In some embodiments, the second moving member has a second opening, and the vibration device further includes a third vibration module disposed in the second opening.

In some embodiments, the third vibration module further includes a third moving element and a third elastic element, and the third elastic element is disposed between the third moving element and the fixing portion.

In some embodiments, the third vibration module further includes a third magnetic assembly and a third induction coil, corresponding to the third magnetic assembly, for generating an electromagnetic driving force to drive the third moving member to move along the third axial direction.

In summary, the present invention discloses a vibration device, which includes a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel and the electromagnetic driving component are arranged on the same plane in the stator, so that the thickness of the vibration device can be reduced, and the aim of miniaturization is fulfilled. In some embodiments, the present invention further provides a vibration device, which can realize unidirectional vibration, single or simultaneous bi-directional vibration and tri-directional vibration, so that when the vibration device disclosed by the present invention is installed in an electronic device (such as a smart phone or a tablet computer), different information can be represented by the vibrations in different directions to notify a user.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosed principles. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.

Drawings

Fig. 1 is a schematic perspective view of a vibration device according to an embodiment.

Fig. 2 is an exploded view showing the vibrator of fig. 1.

FIG. 3 is a top view of the vibration device of FIG. 1 with the upper fixture removed.

Fig. 4 is a schematic view of a vibration device according to another embodiment of the disclosure.

Fig. 5 is an exploded view of another embodiment of the vibration device according to the present disclosure.

Fig. 6 is a top view of a vibration device according to another embodiment of the present disclosure.

Fig. 7 is a top view of a vibration device according to another embodiment of the present disclosure.

Fig. 8 is an exploded view of a vibration device according to another embodiment of the present disclosure.

Fig. 9 is a top view of a vibration module disposed on a fixing portion according to another embodiment of the disclosure.

FIG. 10 is a cross-sectional view of the first magnetic element and the first induction coil of FIG. 9 taken along line A-A'.

Fig. 11 is a schematic view of a fixing portion of a vibration device and a circuit board according to another embodiment of the disclosure.

Fig. 12 is a schematic structural view of a fixing portion according to another embodiment of the disclosure.

Fig. 13 is a schematic view of a vibration device according to another embodiment of the disclosure.

Fig. 14 is an exploded view of the vibrator device of fig. 13.

Fig. 15 is a schematic view of a vibration device according to another embodiment of the disclosure.

Fig. 16 is an exploded view of the vibrator device of fig. 15.

Fig. 17 is a schematic view of a vibration device according to another embodiment of the disclosure.

Fig. 18 is an exploded view of the vibrator device of fig. 17.

FIG. 19 is a perspective cross-sectional view taken along line B-B' of FIG. 17 in accordance with the present disclosure.

Fig. 20 is an exploded view of another embodiment of the vibration device of the present disclosure.

FIG. 21 is a cross-sectional view taken along line C-C' of FIG. 20 in accordance with the present disclosure.

The reference numbers are as follows:

100. 200, 300A, 400, 500, 600, 700, 800 vibrating device

102 upper fixing piece

1021 is provided with an opening

1022 lower surface

1023 convex part

1041-1046 upper induction coil

106 eccentric wheel

1061 central opening

1062 first groove

1063 second groove

1064 bulge

1065 bulge

1066 bulge

108 lower induction coil

1081 ~ 1086 lower induction coil

110 rotating shaft

112 lower fixing piece

1121 bottom opening

1122 upper surface

1123 raised part

114 first magnetic assembly

116 second magnetic assembly

118 position sensor

202 stator

2021 internal surface

2023 projection

2025 upper surface

204 induction coil

206 eccentric wheel

2061 first groove

2062 second groove

208 rotating the shaft

210 third magnetic assembly

212 fourth magnetic assembly

214 sensing assembly

302 stator

3021 inner surface

3023 first projection

3025 second projection

304 induction coil

306 sensing assembly

401 upper cover

402 fixed part

402A fixed part

404 vibration module

406 first moving part

4061 mounting groove

408 first elastic component

410 first magnetic assembly

412 first induction coil

414 weight block

416 gel

418 sensing assembly

420 circuit board

422 insulating layer

424 conductive layer

502 fixed part

5021 baffle plate

504 first vibration module

506 second vibration module

508 first moving part

510 first magnetic assembly

512 first induction coil

514 first elastic component

516 second moving part

518 second magnetic assembly

520 second induction coil

522 second elastic component

602 fixed part

604 first vibration module

606 second vibration module

608 first moving part

6081 first opening

610 first magnetic assembly

612 first induction coil

614 first resilient component

616 second moving part

618 second magnetic assembly

620 second induction coil

622 second elastic component

624 sensing assembly

702 fixed part

704 first vibration module

706 second vibration module

707 third vibration module

708 first moving part

7081 first groove

7082 first opening

710 first magnetic assembly

712 first induction coil

714 first elastic component

716 second moving part

7161 second groove

7162 second opening

718 second magnetic assembly

720 second induction coil

722 second elastic component

724 third moving part

7241 bottom part

7242 projection

726 third magnetic assembly

728 third induction coil

730 third elastic component

732 sensing assembly

802 fixed part

804 first vibration module

806 second vibration module

808 first moving part

8081 opening

810 first magnetic assembly

812 first induction coil

814 first elastic component

816 base

8161 bulge

818 second magnetic component

820 second induction coil

822 a second elastic component

a minimum distance

b maximum distance

c width

CL center line

Detailed Description

In order to make the objects, features and advantages of the present disclosure more comprehensible, embodiments accompanied with figures are described in detail below. The configuration of the components in the embodiments is for illustration and is not intended to limit the scope of the disclosure. And the repetition of certain portions of the drawing figures in the various embodiments is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are merely referenced with additional directions. Accordingly, the directional terminology used is intended to be in the nature of words of description rather than of limitation.

Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used in embodiments to describe a relative relationship of one component of an icon to another component. It will be appreciated that if the device of the icon is turned upside down, components described as being on the "lower" side will be components on the "upper" side.

As used herein, the term "about" generally means within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The amounts given herein are approximate, meaning that the meaning of "about" or "approximately" may still be implied without particular recitation.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic perspective view of a vibration device 100 according to an embodiment of the disclosure, and fig. 2 is an exploded view of the vibration device 100 in fig. 1 according to the disclosure. As shown in fig. 1 and 2, the vibration device 100 includes an upper fixing member 102, a plurality of upper induction coils, at least one magnetic element, an eccentric 106, a plurality of lower induction coils, a rotating shaft 110, and a lower fixing member 112. The upper fixture 102 and the lower fixture 112 may form a stator of the vibration device 100. The upper fixing member 102 and the lower fixing member 112 have an upper opening 1021 and a lower opening 1121 respectively, the eccentric wheel 106 has a central opening 1061, and the rotating shaft 110 passes through the central opening 1061, the upper opening 1021 and the lower opening 1121 and is disposed on the upper fixing member 102 and the lower fixing member 112 through a bearing structure (not shown), so that the eccentric wheel 106 can be driven by the rotating shaft 110 to rotate around the Z-axis direction relative to the upper fixing member 102 and the lower fixing member 112.

In this embodiment, the upper induction coil, the lower induction coil and the at least one magnetic element form an electromagnetic driving element of the vibration device 100. The vibration device 100 further includes a first magnetic element 114 and a second magnetic element 116, and the eccentric wheel 106 further has a first groove 1062, a second groove 1063, a protrusion 1064, a protrusion 1065, and a protrusion 1066. The first groove 1062 is formed between the protruded portion 1064 and the protruded portion 1065, the second groove 1063 is formed between the protruded portion 1065 and the protruded portion 1066, and the first groove 1062 and the second groove 1063 are used for accommodating the second magnetic element 116 and the first magnetic element 114, respectively. In this embodiment, when the first magnetic element 114 and the second magnetic element 116 are disposed on the eccentric 106, the magnetic poles of the first magnetic element 114 and the second magnetic element 116 are parallel to the rotation axis 110 (i.e. parallel to the Z-axis). The N-pole of the first magnetic element 114 and the S-pole of the second magnetic element 116 face the upper fixture 102, and the S-pole of the first magnetic element 114 and the N-pole of the second magnetic element 116 face the lower fixture 112. In some embodiments, the first magnetic element 114 and the second magnetic element 116 may also be multi-pole magnets. It is further noted that the protrusion 1064, the protrusion 1065, the protrusion 1066, the first magnetic element 114, and the second magnetic element 116 may form a fan-shaped structure.

As shown in fig. 2, the upper fixing member 102 and the lower fixing member 112 respectively have a disc-shaped structure, and the upper fixing member 102 has a lower surface 1022, and six protrusions 1023 are formed on the lower surface 1022; the lower fixing member 112 has an upper surface 1122, and six protrusions 1123 are formed on the upper surface 1122, corresponding to the six protrusions 1023. The lower surface 1022 and the upper surface 1122 face the eccentric 106. In this embodiment, the vibration device 100 includes six upper induction coils 1041 to 1046 and six lower induction coils 1081 to 1086, the upper induction coils 1041 to 1046 are respectively disposed on the plurality of protrusions 1023, and the lower induction coils 1081 to 1086 are respectively disposed on the plurality of protrusions 1123 on the upper surface 1122. The upper induction coils 1041 to 1046 and the lower induction coils 1081 to 1086 are disposed corresponding to the first magnetic elements 114 and the second magnetic elements 116.

Referring to fig. 2 and 3, fig. 3 is a top view of the vibration device 100 of fig. 1 with the upper fixing member 102 removed. As shown in fig. 3, the initial position of the first magnetic assembly 114 can be located between the upper induction coil 1042 and the upper induction coil 1043, and the initial position of the second magnetic assembly 116 can be located between the upper induction coil 1041 and the upper induction coil 1042. When current is supplied to the upper induction coils 1041 to 1046 and the lower induction coils 1081 to 1086 (the lower induction coils 1081 to 1086 are not shown in fig. 3 due to the view angle), the upper induction coils 1041 to 1046 and the lower induction coils 1081 to 1086 respectively generate an electromagnetic driving force with the first magnetic element 114 and the second magnetic element 116, so that the eccentric wheel 106 rotates around the rotation shaft 110. Specifically, taking fig. 2 and 3 as an example, the upper induction coil 1041 and the lower induction coil 1081 respectively generate a magnetic repulsion force with the second magnetic element 116, the upper induction coil 1042 and the lower induction coil 1082 respectively generate a magnetic attraction force with the second magnetic element 116, and the upper induction coil 1043 and the lower induction coil 1083 respectively generate a magnetic repulsion force with the first magnetic element 114, thereby pushing the first magnetic element 114, the second magnetic element 116, and the eccentric wheel 106 to rotate counterclockwise around the Z axis. It should be noted that the currents supplied to the upper induction coils 1041 to 1046 and the lower induction coils 1081 to 1086 may be direct currents or alternating currents, and the phases of the alternating currents supplied to each of the upper induction coils 1041 to 1046 and the lower induction coils 1081 to 1086 may be the same or different.

Since the center of gravity of the first magnetic assembly 114, the second magnetic assembly 116 and the eccentric 106 is biased toward the fan-shaped structure and not on the rotating shaft 110, when the first magnetic assembly 114, the second magnetic assembly 116 and the eccentric 106 rotate around the rotating shaft 110, the vibration device 100 will vibrate along the XY plane. In addition, the vibration device 100 may be provided with at least one position sensor 118 for sensing the position of the eccentric 106 during rotation. As shown in fig. 2, the vibration device 100 includes three position sensors 118 disposed on the lower fixing member 112 and located between two protrusions 1123.

It should be noted that, since the eccentric wheel 106 as a rotor in the vibration device 100 is disposed between the upper fixing member 102 and the lower fixing member 112, the thickness of the vibration device 100 in the Z-axis direction can be reduced to achieve the purpose of miniaturization.

Referring to fig. 4 and 5, fig. 4 is a schematic diagram of a vibration device 200 according to another embodiment of the disclosure, and fig. 5 is an exploded view of the vibration device 200 according to another embodiment of the disclosure. In this embodiment, the vibration device 200 includes a stator 202, a plurality of induction coils 204, an eccentric 206, a rotating shaft 208, a third magnetic element 210, and a fourth magnetic element 212. The stator 202 has an annular structure, an inner surface 2021, and a plurality of protrusions 2023 formed on the inner surface 2021. The plurality of induction coils 204 are disposed on the protrusions 2023 on the inner surface 2021 corresponding to the third magnetic element 210 and the fourth magnetic element 212.

Similar to the previous embodiments, the third magnetic assembly 210 and the fourth magnetic assembly 212 are mounted on a first recess 2061 and a second recess 2062 of the eccentric 206, and the eccentric 206 is rotatable about the rotation axis 208. It is noted that, as shown in fig. 4, the magnetic pole directions of the third magnetic element 210 and the fourth magnetic element 212 are directions (Z-axis directions) that are radial and perpendicular to the rotation axis 208. Specifically, the north pole of the third magnetic assembly 210 is oriented toward the stator 202 and the south pole is oriented toward the rotational axis 208. In contrast, the S pole of the fourth magnetic assembly 212 is oriented toward the stator 202 and the N pole is oriented toward the rotational axis 208. When the plurality of induction coils 204 are energized, an electromagnetic driving force is generated between the induction coils and the third magnetic element 210 and the fourth magnetic element 212, so as to drive the third magnetic element 210, the fourth magnetic element 212 and the eccentric wheel 206 to rotate around the rotation shaft 208. Since the center of gravity of the eccentric 206, the third magnetic assembly 210 and the fourth magnetic assembly 212 is offset from the rotation axis 208, the vibration device 200 vibrates in the XY plane when the eccentric 206 rotates.

In addition, the vibration device 200 may include at least one sensing element 214. As shown in fig. 5, the vibration device 200 includes three sensing elements 214 disposed on an upper surface 2025 of the stator 202, but is not limited thereto. For example, the sensing element 214 can also be disposed on the inner surface 2021 between the two protrusions 2023. It should be noted that, since the induction coil 204, the eccentric wheel 206, the third magnetic element 210 and the fourth magnetic element 212 of the embodiment are all located on the same plane (XY plane), the thickness of the vibration device 200 in the Z-axis direction can be further reduced to achieve the purpose of miniaturization.

Referring to fig. 6, fig. 6 is a top view of a vibration device 300 according to another embodiment of the disclosure. The vibration device 300 of this embodiment is similar to the vibration device 200 of fig. 4, and is different in that the stator 302 of the vibration device 300 of this embodiment has a frame-shaped structure. As shown in fig. 6, the stator 302 has an inner surface 3021, and four first protrusions 3023 are formed on the inner surface 3021 at four corners of the stator 302.

Furthermore, the vibration device 300 may include an eccentric wheel 206, a rotating shaft 208, a third magnetic assembly 210, a fourth magnetic assembly 212, and four induction coils 304, wherein the induction coils 304 are respectively disposed on the first protrusions 3023 and face the eccentric wheel 206. Similarly, the N pole of the third magnetic assembly 210 may be oriented toward the stator 202 and the S pole may be oriented toward the rotational axis 208, the S pole of the fourth magnetic assembly 212 may be oriented toward the stator 202 and the N pole may be oriented toward the rotational axis 208. When the plurality of induction coils 304 are energized, an electromagnetic driving force is generated between the induction coils and the third magnetic element 210 and the fourth magnetic element 212, so as to drive the third magnetic element 210, the fourth magnetic element 212 and the eccentric wheel 206 to rotate around the rotation shaft 208. Since the center of gravity of the eccentric 206, the third magnetic assembly 210 and the fourth magnetic assembly 212 is offset from the rotation axis 208, the vibration device 300 vibrates in the XY plane when the eccentric 206 rotates.

In addition, as shown in fig. 6, four second protrusions 3025 may be further formed on the inner surface 3021 of the stator 302 at four sides of the stator 302. The vibration device 300 may include at least one sensing element 306 for sensing the position of the eccentric 206 during rotation. In this embodiment, the vibration device 300 may include three sensing elements 306 respectively disposed on the three second protrusions 3025, and each sensing element 306 is located between two adjacent induction coils 304. It is noted that, in other embodiments, the sensing element 306 may also be disposed directly on the inner surface 3021.

Since the electromagnetic driving assembly of this embodiment is located on the same plane (XY plane) as the eccentric 206, the thickness of the vibration device 300 in the Z-axis direction can be reduced as well.

Referring to fig. 7, fig. 7 is a top view of a vibration device 300A according to another embodiment of the disclosure. The vibrating device 300A is similar to the vibrating device 300 of the previous embodiment, and the difference between the two embodiments is that four induction coils 304 are respectively disposed on the second protruding portions 3025 on four sides and facing the eccentric wheel 206, and three sensing elements 306 are disposed on the three first protruding portions 3023. The arrangement positions of the induction coil 304 and the sensing element 306 may depend on the actual design requirements, for example, the sensing element 306 may also be directly disposed on the inner surface 3021. Since the driving method of the vibration device 300A of this embodiment is similar to that of the previous embodiment, it is not repeated herein.

Referring to fig. 8 to 9, fig. 8 is an exploded view of a vibration device 400 according to another embodiment of the disclosure, and fig. 9 is a top view of a vibration module 404 disposed on a fixing portion 402 according to the embodiment of the disclosure of fig. 8. As shown in fig. 8, the vibration device 400 includes a top cover 401, a fixing portion 402 and a first vibration module 404, wherein the vibration module 404 is disposed in the fixing portion 402, and the top cover 401 is fixed on the fixing portion 402. The vibration module 404 may include a first moving part 406, at least one first elastic element 408, at least one first magnetic element 410, and at least one first induction coil 412. In this embodiment, the vibration module 404 may include two first elastic elements 408, five first magnetic elements 410, and eight first induction coils 412.

As shown in fig. 8 and 9, the first moving part 406 has a rectangular structure, and a mounting groove 4061 corresponding to the first magnetic component 410 is formed thereon for accommodating the plurality of first magnetic components 410. The N-poles of the first, third and fifth magnetic elements 410 face in the-Z direction, and the N-poles of the second and fourth magnetic elements 410 face in the Z direction. The two first elastic elements 408 are arranged along the Y-axis direction and located on opposite sides of the first moving element 406, and the first elastic elements 408 are used to connect the first moving element 406 to the fixing portion 402. It is noted that the first moving member 406 is suspended in the fixing portion 402 by two first elastic components 408, and the first moving member 406 does not contact the fixing portion 402. In addition, as shown in fig. 9, two first elastic assemblies 408 are connected to opposite sides of the first moving member 406, and the two first elastic assemblies 408 are disposed in opposite directions. That is, the fixing portion 402 may define a center line CL perpendicular to the Y-axis (the first axial direction), and the two first elastic elements 408 are rotationally symmetric with respect to the center line CL.

As shown in fig. 8, four first induction coils 412 are disposed on the upper side of the first moving part 406 and fixed to the upper cover 401, and the other four first induction coils 412 are disposed on the lower side of the first moving part 406 and fixed to the fixing part 402.

As shown in fig. 9, the first magnetic element 410 and the first induction coil 412 are disposed alternately. When the first induction coil 412 is energized, an electromagnetic driving force is generated with the first magnetic assembly 410, thereby driving the first moving member 406 to move along the Y-axis direction (first axial direction). Since the first induction coils 412 receive an alternating current to generate an electromagnetic driving force, the direction of the electromagnetic driving force is continuously changed, so that the first moving member 406 repeatedly moves left and right in the fixing portion 402 along the Y-axis direction, and the vibration device 400 vibrates in the Y-axis direction.

Furthermore, the vibration device 400 may further include two negative weights 414 and a plurality of gels 416 for adjusting the resonant frequency of the vibration device 400 during vibration. Wherein, the two negative weights 414 are symmetrically disposed on opposite sides of the first moving member 406. As shown in fig. 9, the gel 416 may be disposed between the first moving member 406 and the first elastic element 408 or between the fixing portion 402 and the first elastic element 406. The gel 416 may not only be used to adjust the resonant frequency of the vibration device 400, but also may have a damping function. For buffering, the gel 416 may also be disposed on a bottom portion 4081 of the first elastic component 408 or between the first magnetic component 410 and the fixing portion 402, and the location of the gel 416 is not limited to the disclosed embodiment.

In addition, the vibration device 400 may also include at least one sensing element 418 disposed on the first moving part 406 for detecting a position of the first moving part 406 relative to the fixed part 402. Specifically, in this embodiment, the sensing element 418 is disposed between two first magnetic elements 410 (as shown in fig. 8). Based on the structural design of the present embodiment, the vibration device 400 can provide vibration in the Y-axis direction, and the thickness of the vibration device 400 in the Z-axis direction can also be reduced.

Next, referring to fig. 10, fig. 10 is a cross-sectional view of the first magnetic element 410 and the first induction coil 412 taken along a line a-a' in fig. 9. For convenience of illustration, fig. 10 shows only one first magnetic element 410 and two adjacent first induction coils 412. The first magnetic element 410 has a width c in the Y-axis direction (first axial direction), and the two first induction coils 412 have a minimum distance a and a maximum distance b therebetween. The first magnetic element 410 is disposed between two adjacent first induction coils 412, and the width c of the first magnetic element 410 is greater than the minimum distance a and less than the maximum distance b.

Referring to fig. 11, fig. 11 is a schematic view of a fixing portion 402 and a circuit board 420 of a vibration device according to another embodiment of the disclosure. In this embodiment, the vibration device (e.g., the vibration device 400 of fig. 8) may further include a circuit board 420 disposed on the fixing portion 402, and the first induction coil 412 may be disposed therein (the circuit board 420 and the first induction coil 412 may form a planar coil). Since the number of turns of the first induction coil 412 in the flat coil can be smaller, the thickness of the flat coil can be smaller, thereby further reducing the thickness of the vibration device (such as the vibration device 400 of fig. 8) in the Z-axis direction.

Next, referring to fig. 12, fig. 12 is a schematic structural diagram of a fixing portion 402A according to another embodiment of the disclosure. In this embodiment, the fixing portion 402A may be a metal member, and the vibration device (such as the vibration device 400 of fig. 8) may further include an insulating layer 422 and a plurality of conductive layers 424. The insulating layer 422 is disposed between the conductive layer 424 and the fixing portion 402A. It is noted that the conductive layers 424 can form an induction coil (such as the first induction coil 412), and the induction coil formed by the conductive layers 424 can have a smaller thickness in the Z-axis direction, so that the thickness of the vibration device in the Z-axis direction can be further reduced.

Referring to fig. 13 and 14, fig. 13 is a schematic view of a vibration device 500 according to another embodiment of the disclosure, and fig. 14 is an exploded view of the vibration device 500 of fig. 13. As shown in fig. 13, the vibration device 500 includes a fixing portion 502, a first vibration module 504 and a second vibration module 506. The fixing portion 502 has a partition 5021, and the first vibration module 504 and the second vibration module 506 are disposed in the fixing portion 502 and located at two sides of the partition 5021. In this embodiment, the first vibration module 504 is used for generating vibration in the Y-axis direction (first axial direction), and the second vibration module 506 is used for generating vibration in the X-axis direction (second axial direction). Wherein the first axis is non-parallel to the second axis. For example, the first axis may be substantially perpendicular to the second axis.

As shown in fig. 14, the first vibration module 504 includes a first moving part 508, three first magnetic elements 510, four first induction coils 512, and two first elastic elements 514. Three first magnetic assemblies 510 are disposed in the first moving member 508, and four first induction coils 512 corresponding to the first magnetic assemblies 510 are disposed on two sides of the first moving member 508 in the Z-axis direction. Two of the first induction coils 512 are fixedly disposed in the fixing portion 502, and the other two first induction coils 512 are fixedly disposed on an upper cover (not shown) of the fixing portion 502. The two first elastic elements 514 are respectively disposed on two sides of the first moving part 508 in the Y-axis direction for suspending the first moving part 508 in the fixing part 502.

In addition, the second vibration module 506 includes a second moving member 516, three second magnetic elements 518, four second induction coils 520, and two second elastic elements 522. Three second magnetic assemblies 518 are disposed in the second moving member 516, and four second induction coils 520 corresponding to the second magnetic assemblies 518 are disposed on two sides of the second moving member 516 in the Z-axis direction. Two of the second induction coils 520 are fixedly disposed in the fixing portion 502, and the other two second induction coils 520 are fixedly disposed on the upper cover (not shown). The two second elastic elements 522 are respectively disposed on two sides of the second moving element 516 in the X-axis direction for suspending the second moving element 516 in the fixing portion 502.

Similar to the previous embodiment, when the first induction coil 512 is energized, it induces with the first magnetic assembly 510 to generate an electromagnetic driving force, thereby driving the first moving part 508 to move along the Y-axis direction, so that the vibration device 500 generates vibrations along the Y-axis direction, and when the second induction coil 520 is energized, it induces with the second magnetic assembly 518 to generate an electromagnetic driving force, thereby driving the second moving part 516 to move along the X-axis direction, so that the vibration device 500 generates vibrations along the X-axis direction. It is noted that the first vibration module 504 and the second vibration module 506 can generate vibrations at the same time or generate vibrations separately.

In addition, the vibration device 500 may further include at least one sensing element 524 disposed on the first moving part 508 or the second moving part 516 for detecting the movement of the first moving part 508 or the second moving part 516. In this embodiment, the vibration device 500 includes two sensing elements 524 respectively disposed on the first moving element 508 and the second moving element 516.

Based on the design of the first vibration module 504 and the second vibration module 506 of this embodiment, the vibration device 500 can provide vibration in two directions. In addition, in another embodiment, the fixing portion 502 may not have the spacer 5021 shown in fig. 14, and the first elastic element 514 between the first moving member 508 and the second moving member 516 may be directly connected to the second moving member 516.

Next, referring to fig. 15 and fig. 16, fig. 15 is a schematic diagram of a vibration device 600 according to another embodiment of the disclosure, and fig. 16 is an exploded view of the vibration device 600 of fig. 15. As shown in fig. 15, the vibration device 600 includes a fixing portion 602, a first vibration module 604 and a second vibration module 606. The first vibration module 604 and the second vibration module 606 are disposed in the fixing portion 602. In this embodiment, the first vibration module 604 is used for generating vibration in the Y-axis direction (first axial direction), and the second vibration module 606 is used for generating vibration in the X-axis direction (second axial direction). Wherein the first axial direction is not parallel to the second axial direction.

As shown in fig. 16, the first vibration module 604 includes a first moving member 608, six first magnetic elements 610, eight first induction coils 612, and two first elastic elements 614. Three first magnetic assemblies 610 are disposed on one side of the first moving member 608, and the other three first magnetic assemblies 610 are disposed on the other side of the first moving member 608. Eight first induction coils 612 corresponding to the first magnetic elements 610 are disposed on two sides of the first moving part 608 in the Z-axis direction. Four of the first induction coils 612 are fixedly disposed in the fixing portion 602, and the other four first induction coils 612 are fixedly disposed on an upper cover (not shown) of the fixing portion 602. The two first elastic elements 614 are respectively disposed on two sides of the first moving element 608 in the Y-axis direction for suspending the first moving element 608 in the fixing portion 602. It is noted that in this embodiment, the first moving part 608 has a first opening 6081 in the middle for accommodating the second vibration module 606.

In this embodiment, the second vibration module 606 includes a second moving element 616, two second magnetic elements 618, two second induction coils 620 and two second elastic elements 622. The two second magnetic assemblies 618 are disposed in the second moving part 616, and the two first induction coils 612 corresponding to the second magnetic assemblies 618 are located at two sides of the second moving part 616 in the Z-axis direction. One of the second induction coils 620 is fixedly disposed in the fixing portion 602, and the other second induction coil 620 is fixedly disposed in the upper cover (not shown). It is noted that two second elastic assemblies 622 are respectively disposed on two sides of the second moving part 616 in the X-axis direction for suspending the second moving part 616 in the first opening 6081 of the first moving part 608.

When the first induction coil 612 is energized, it induces with the first magnetic assembly 610 to generate an electromagnetic driving force, thereby driving the first moving part 608 to move along the Y-axis direction, so that the vibration device 600 generates a vibration along the Y-axis direction, and when the second induction coil 620 is energized, it induces with the second magnetic assembly 618 to generate an electromagnetic driving force, thereby driving the second moving part 616 to move along the X-axis direction, so that the vibration device 600 generates a vibration along the X-axis direction. Similarly, the first vibration module 604 and the second vibration module 606 can generate vibrations simultaneously or separately.

In addition, the vibration device 600 may further include at least one sensing element 624 disposed on the first moving part 608 or the second moving part 616 for detecting the movement of the first moving part 608 or the second moving part 616. In this embodiment, the vibration device 600 includes a sensing element 624 disposed on the first moving element 608 and located between two adjacent first magnetic elements 610.

The vibration device 600 of this embodiment provides vibrations in two directions, and since the second vibration module 606 is disposed in the first opening 6081 of the first moving part 608, the length of the vibration device 600 in the Y-axis direction can be further reduced, thereby achieving the purpose of miniaturization.

Referring to fig. 17 and 18, fig. 17 is a schematic view of a vibration device 700 according to another embodiment of the disclosure, and fig. 18 is an exploded view of the vibration device 700 of fig. 17. As shown in fig. 17, the vibration device 700 includes a fixing portion 702, a first vibration module 704, a second vibration module 706, and a third vibration module 707. In this embodiment, the first vibration module 704 is used for generating vibration in the Y-axis direction (first axial direction), the second vibration module 706 is used for generating vibration in the X-axis direction (second axial direction), and the third vibration module 707 is used for generating vibration in the Z-axis direction (third axial direction).

As shown in fig. 18, the first vibration module 704 includes a first moving member 708, four first magnetic elements 710, four first induction coils 712, and two first elastic elements 714. The four first magnetic assemblies 710 are disposed in the first moving part 708, and four first induction coils 712 corresponding to the first magnetic assemblies 710 are disposed on two sides of the first moving part 708 in the Z-axis direction. Two of the first induction coils 712 are fixedly disposed in the fixing portion 702, and the other two first induction coils 712 are fixedly disposed on an upper cover (not shown) of the fixing portion 702. The two first elastic elements 714 are respectively disposed on two sides of the first moving part 708 in the Y-axis direction for suspending the first moving part 708 in the fixing part 702.

In addition, the second vibration module 706 includes a second moving member 716, four second magnetic elements 718, four second induction coils 720 and two second elastic elements 722. The four second magnetic assemblies 718 are disposed in the second moving part 716, and the four first induction coils 712 corresponding to the second magnetic assemblies 718 are disposed on two sides of the second moving part 716 in the Z-axis direction. Two of the second induction coils 720 are fixedly disposed in the fixing portion 702, and the other two second induction coils 720 are fixedly disposed on the upper cover (not shown). The two second elastic elements 722 are respectively disposed on two sides of the second moving part 716 in the X-axis direction, so as to suspend the second moving part 716 in the fixing part 702.

It is noted that the first moving part 708 has a first groove 7081, and the second moving part 716 has a second groove 7161. The first groove 7081 faces the second groove 7161 and is substantially aligned with the second groove 7161, and the first moving part 708 and the second moving part 716 are arranged along the Z-axis direction (the third axis direction). Wherein, the third axial direction can be perpendicular to the first axial direction or the second axial direction. In addition, the first moving part 708 further has a first opening 7082, the second moving part 716 further has a second opening 7162, and the third vibration module 707 can be disposed in the first opening 7082 and the second opening 7162.

Referring to fig. 18 and fig. 19, fig. 19 is a perspective cross-sectional view taken along line B-B' of fig. 17 according to the present disclosure. As shown in fig. 18, the third vibration module 707 includes a third moving member 724, a third magnetic element 726, a third induction coil 728, and two third elastic elements 730. The third moving member 724 has a bottom 7241 and a protrusion 7242, the third induction coil 728 is fixed to the upper cover (not shown), and the third induction coil 728 has a ring structure surrounding the protrusion 7242 without contacting the protrusion 7242. The third magnetic assembly 726 has a ring structure and surrounds the third induction coil 728, and the third magnetic assembly 726 is fixed on the third moving member 724. One of the third elastic elements 730 (see the third elastic element 730 below the portion in fig. 18) is disposed between the fixing portion 702 and the third moving member 724 for connecting the fixing portion 702 and the bottom 7241 of the third moving member 724. Specifically, an inner ring portion of the third elastic element 730 is connected to the bottom portion 7241 of the third moving element 724, and an outer ring portion of the third elastic element 730 is connected to the fixing portion 702. Furthermore, another third elastic element 730 (e.g., the third elastic element 730 shown above in fig. 18) is disposed between the aforementioned top cover (not shown) and the third magnetic element 726. The third magnetic element 726 is connected to an inner ring portion of the third elastic element 730, and an outer ring portion of the third elastic element 730 is connected to the upper cover (not shown). It is noted that, as shown in fig. 19, the first moving part 708 is suspended in the fixing part 702, and the second moving part 716 is suspended in the fixing part 702 and does not contact with the first moving part 708. In addition, the third moving part 724 does not contact with the first moving part 708 or the second moving part 716.

When the first induction coil 712 is energized, it induces with the first magnetic assembly 710 to generate an electromagnetic driving force, so as to drive the first moving part 708 to move along the Y-axis direction, so that the vibration device 700 generates a vibration along the Y-axis direction, and when the second induction coil 720 is energized, it induces with the second magnetic assembly 718 to generate an electromagnetic driving force, so as to drive the second moving part 716 to move along the X-axis direction, so as to drive the vibration device 700 to generate a vibration along the X-axis direction. When the third induction coil 728 is energized, the third magnetic assembly 726 is induced to generate an electromagnetic driving force, so that the third magnetic assembly 726 drives the third moving part 724 to move along the Z-axis direction, so that the vibration device 700 generates Z-axis vibration. The first vibration module 704, the second vibration module 706 and the third vibration module 707 may generate vibrations at the same time or generate vibrations respectively. Furthermore, as shown in fig. 18, the vibration device 700 may include three sensing elements 732 respectively disposed on the first moving member 708, the second moving member 716 and the third moving member 724 for detecting the movement of the first moving member 708, the second moving member 716 and the third moving member 724.

Referring to fig. 20 and 21, fig. 20 is an exploded view of a vibration device 800 according to another embodiment of the present disclosure, and fig. 21 is a cross-sectional view taken along line C-C' of fig. 20. As shown in fig. 20, the vibration device 800 includes a fixed portion 802, a first vibration module 804 and a second vibration module 806, and the first vibration module 804 includes a first moving member 808, four first magnetic elements 810, four first induction coils 812 and two first elastic elements 814. The positions and relative relationships of the components of the first vibration module 804 are similar to those of the first vibration module 604 in fig. 15, and therefore are not described herein again. The first moving part 808 has an opening 8081, and the second vibration module 806 is engaged with the opening 8081.

As shown in fig. 21, the second vibration module 806 includes a base 816, a second magnetic element 818, a second induction coil 820 and two second elastic elements 822. The base 816 has a protrusion 8161, and the second induction coil 820 is sleeved on the protrusion 8161. Two second elastic elements 822 suspend the second magnetic element 818 in the base 816, wherein the second magnetic element 818 has a ring structure movably surrounding the second induction coil 820.

When the first induction coil 812 is energized, it induces with the first magnetic assembly 810 to generate an electromagnetic driving force, thereby driving the first moving part 808 to move along the Y-axis direction, so that the vibration device 800 generates a vibration in the Y-axis direction, and when the second induction coil 820 is energized, it induces with the second magnetic assembly 818 to generate an electromagnetic driving force, thereby driving the magnetic assembly 818 to move along the Z-axis direction, so that the vibration device 800 generates a vibration in the Z-axis direction. Similarly, the first vibration module 804 and the second vibration module 806 can generate vibrations at the same time or generate vibrations separately. In addition, the vibration device 800 also has two sensing elements (not shown) respectively disposed on the first moving member 808 and the base 816 for detecting the movement of the first moving member 808 and the base 816.

In summary, the present invention discloses a vibration device, which includes a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel and the electromagnetic driving component are arranged on the same plane in the stator, so that the thickness of the vibration device can be reduced, and the aim of miniaturization is fulfilled. In some embodiments, the present invention discloses another vibration device, which can realize unidirectional vibration, independent or simultaneous bidirectional vibration and three-directional vibration, so that when the vibration device disclosed by the present invention is installed in an electronic device (such as a smart phone or a tablet computer), different information can be represented by the vibrations in different directions to inform a user.

Although the embodiments of the present disclosure and their advantages have been disclosed, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the disclosure. Moreover, the scope of the present disclosure is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Accordingly, the scope of the present disclosure includes the processes, machines, manufacture, compositions of matter, means, methods, and steps described above. In addition, each claim constitutes a separate embodiment, and the scope of the present disclosure also includes combinations of the respective claims and embodiments.

Claims

1. A vibration device, comprising:

a fixed part;

a first vibration module disposed in the fixing portion, comprising:

a first moving member;

a first elastic component connected between the fixed part and the first moving part;

a first magnetic assembly; and

the first induction coil corresponds to the first magnetic assembly and generates an electromagnetic driving force to drive the first moving part to move along a first axial direction; and

a second vibration module disposed in the fixing portion, comprising:

a second moving member;

a second magnetic assembly; and

the second induction coil corresponds to the second magnetic assembly and generates an electromagnetic driving force to drive the second moving part to move along a second axial direction;

wherein the first axis is not parallel to the second axis;

the first magnetic assembly and the first induction coil are used for driving the first moving part to move relative to the fixed part, and the second magnetic assembly and the second induction coil are used for driving the second moving part to move relative to the fixed part and the first moving part;

the first moving part is provided with a first opening corresponding to the second moving part, and the first moving part and the second moving part are arranged along a third axial direction which is perpendicular to the first axial direction and the second axial direction;

the second moving part is provided with a second opening, and the vibration device also comprises a third vibration module which is arranged in the first opening and the second opening.

2. The vibration device of claim 1, further comprising a circuit board disposed on the fixing portion, wherein the first induction coil is disposed in the circuit board.

3. The vibration device of claim 1, wherein the vibration device further comprises an insulating layer and a conductive layer, and the fixing portion comprises a metal member, wherein the insulating layer is disposed between the conductive layer and the metal member.

4. The vibration device of claim 1, wherein the vibration device comprises a plurality of first induction coils disposed on the fixing portion, two adjacent first induction coils have a minimum distance and a maximum distance therebetween, and the width of the first magnetic element in the first axial direction is greater than the minimum distance and less than the maximum distance.

5. The vibration device as claimed in claim 1, further comprising a gel disposed between the first moving member and the first elastic member, between the fixed portion and the first elastic member, or between the first magnetic member and the fixed portion.

6. The vibration device of claim 1 wherein the first moving member is suspended in the fixed portion by the first elastic element.

7. The vibration device of claim 1 further comprising another first resilient element, two of said first resilient elements being connected to opposite sides of said first movable element, said two first resilient elements being disposed in opposite directions.

8. The vibration device of claim 1, wherein the third vibration module further comprises a third moving member and a third elastic member, and the third elastic member is disposed between the third moving member and the fixing portion.

9. The vibration device of claim 8, wherein the third vibration module further comprises a third magnetic element and a third induction coil, corresponding to the third magnetic element, for generating an electromagnetic driving force to drive the third moving element to move along the third axial direction.