Linear vibrator

Patent metadata

Field	Value
Publication number	US-9859779-B2
Application number	US-201514742815-A
Country	US
Kind code	B2
Filing date	Jun 18, 2015
Priority date	Dec 23, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A linear vibrator includes a stator having a housing including a receiving space therein, a moveable unit, an elastic member suspending the moveable unit in the receiving space, and a protection member located between the stator and the moveable unit. The protection member forms a first bevel along a vibration direction of the moveable unit, one of the stator and the moveable unit includes a second bevel corresponding to the first bevel. The second bevel keeps a distance from the first bevel for rubbing each other when the linear vibrator falls.

First claim

What is claimed is:

1. A linear vibrator, comprising:
a stator having a housing including a receiving space therein;
a moveable unit;
an elastic member suspending the moveable unit in the receiving space;
a protection member located between the stator and the moveable unit, and forming a first bevel, an extending direction of the first bevel intersecting a vibration direction of the moveable unit;
one of the stator and the moveable unit including a second bevel corresponding to the first bevel, wherein the second bevel is parallel to the first bevel, a distance is formed from the first bevel to the second bevel along the vibration direction of the moveable unit, and the distance is greater than a predetermined vibration amplitude of the moveable unit, the first bevel and the second bevel rub against each other when the linear vibrator falls.

2. The linear vibrator as described in claim 1 , wherein the protection member is located on the stator, and the first bevel thereof faces the moveable unit, the second bevel is formed on the moveable unit.

3. The linear vibrator as described in claim 2 , wherein the housing includes a cover and a base engaging with the cover, the cover includes a first sidewall parallel to the vibration direction and a second sidewall perpendicular to the vibration direction, and the protection member is attached to the first sidewall.

4. The linear vibrator as described in claim 1 , wherein the protection member is located on the moveable unit, and the first bevel thereof faces the stator, the second bevel is formed on the stator.

5. The linear vibrator as described in claim 1 , wherein at least one of the first and second bevels is a ragged surface.

6. The linear vibrator as described in claim 1 , wherein the protection member is made of different materials with different stiffness.

7. The linear vibrator as described in claim 1 , wherein the protection member is made of rigid material.

8. The linear vibrator as described in claim 1 , wherein the protection member is made of stainless steel or duralumin.

9. The linear vibrator as described in claim 1 , wherein a surface of the protection member inclines inward from both ends thereof to provide two first bevels arranged symmetrically.

10. The linear vibrator as described in claim 1 , wherein a surface of the protection member inclines outward from both ends thereof to provide two first bevels arranged symmetrically.

Assignees

• Wang Changliang
• Aac Technologies Pte Ltd

Inventors

• Wang Changliang

Classifications

• H02K33/16 Primary

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title

• H02K33/18

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title

• H02K33/12 Primary

  with armatures moving in alternate directions by alternate energisation of two coil systems · CPC title