Multi-directional vibration actuator

Patent metadata

Field	Value
Publication number	US-10833558-B2
Application number	US-201715830068-A
Country	US
Kind code	B2
Filing date	Dec 4, 2017
Priority date	Dec 8, 2016
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

The present disclosure provides a vibration device, including a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel rotates around a rotating shaft relative to the stator. The electromagnetic driving assembly includes at least one magnetic element and an induction coil. The at least one magnetic element is disposed on the eccentric wheel. The induction coil corresponds to the magnetic element, and the induction coil is disposed on the stator. When a current is applied to the induction coil, the induction coil acts with the magnetic element to generate an electromagnetic force to drive the eccentric wheel to rotate around the rotating shaft, so that the vibration device generates a vibration. The rotating shaft is disposed on the stator.

First claim

What is claimed is:

1. A vibration device, comprising:
a fixed portion; and
a first vibration module, disposed in the fixed portion, comprising:
a first movable member;
a first resilient element, connected between the fixed portion and the first movable member;
a first magnetic element; and
a first induction coil, corresponding to the first magnetic element, wherein the first induction coil acts with the first magnetic element to generate an electromagnetic force to drive the first movable member to move along a first axial direction;

wherein the vibration device further comprises a second vibration module disposed inside the fixed portion, and the second vibration module comprises:
a second movable member;
a second magnetic element; and
a second induction coil, corresponding to the second magnetic element, wherein the second induction coil acts with the second magnetic element to generate an electromagnetic force to drive the second movable member to move along a second axial direction;
wherein the first axial direction is not parallel to the second axial direction.

2. The vibration device as claimed in claim 1 , wherein the vibration device further comprises a circuit board disposed on the fixed portion, and the first induction coil is disposed inside the circuit board.

3. The vibration device as claimed in claim 1 , wherein the vibration device further comprises an insulation layer and a conductive layer, and the fixed portion includes a metal member, wherein the insulation layer is disposed between the conductive layer and the metal member.

4. The vibration device as claimed in claim 1 , wherein the vibration device comprises a plurality of first induction coils disposed on the fixed portion, and a minimum distance and a maximum distance are formed between two adjacent first induction coils, wherein the width of the first magnetic element along the first axial direction is greater than the minimum distance and is less than the maximum distance.

5. The vibration device as claimed in claim 1 , wherein the vibration device further comprises a gel, wherein the gel is disposed between the first movable member and the first resilient element, disposed between the fixed portion and the first resilient element, or disposed between the first magnetic element and the fixed portion.

6. The vibration device as claimed in claim 1 , wherein the first movable member is suspended in the fixed portion by the first resilient element.

7. The vibration device as claimed in claim 1 , wherein the vibration device further comprises another first resilient element, the two first resilient elements are connected to opposite sides of the first movable member, and the two first resilient elements are disposed in opposite directions.

8. The vibration device as claimed in claim 1 , wherein a first opening is formed on the first movable member, and the second movable member is disposed in the first opening.

9. The vibration device as claimed in claim 1 , wherein the first movable member and the second movable member are arranged in a third axial direction, and the third axial direction is substantially perpendicular to the first axial direction or the second axial direction.

10. The vibration device as claimed in claim 1 , wherein a second opening is formed on the second movable member, and the vibration device further comprises a third vibration module disposed in the second opening.

11. The vibration device as claimed in claim 10 , wherein the third vibration module further includes a third movable member and a third resilient element, and the third resilient element is disposed between the third movable member and the fixed portion.

12. The vibration device as claimed in claim 11 , wherein the third vibration module further includes a third magnetic element and a third induction coil, and the third induction coil corresponds to the third magnetic element, wherein the third induction coil acts with the third magnetic element to generate an electromagnetic force to drive the third movable member to move along the third axial direction.

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Chang Che-Wei

Classifications

• H02K1/2795

  the rotor consisting of two or more circumferentially positioned magnets · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K29/08

  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) · CPC title

• H02K7/06

  Means for converting reciprocating motion into rotary motion or vice versa · CPC title

• H02K1/27

  Rotor cores with permanent magnets · CPC title