Linear vibration motor

Patent metadata

Field	Value
Publication number	US-9748827-B2
Application number	US-201414583732-A
Country	US
Kind code	B2
Filing date	Dec 28, 2014
Priority date	Jul 9, 2014
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A linear vibration motor is disclosed in the present disclosure. The linear vibration motor includes a housing including a cover and a base associated with the cover to form an internal space; a pair of elastic members received in the internal space, each of the elastic member including a first connecting portion and an elastic arm extending from the first connecting portion and connected with the cover; an vibrator unit suspended in the internal space by the elastic members; a stator unit mounted on the base; a pair of dampers, each damper located on one side of the first connecting portion, and been in contact with the first connecting portion for absorbing vibrations of the vibrator unit; and a pair of clamping members, each clamping member clamping the first connecting portion and the damper to the vibrator unit.

First claim

What is claimed is:

1. A linear vibration motor comprising,
a housing comprising a cover and a base associated with the cover for forming an internal space;
a pair of elastic members received in the internal space, each of the elastic member comprising a fastening portion and an elastic arm extending from the fastening portion and connected with the cover;
a vibrator unit suspended in the internal space by the elastic members and movable parallel to the base;
a stator unit mounted on the base and facing the vibrator unit with a space therebetween;
a pair of dampers, each damper located on one side of the fastening portion and been in contact with the fastening portion for absorbing vibrations of the vibrator unit;
a pair of clamping members, each clamping member clamping the fastening portion and the damper to the vibrator unit wherein the engaging portion presses the fastening portion and the damper to the vibrator unit; one of the swings engages with upper ends of the fastening portion and the damper, and another swing engages with lower ends of the fastening portion and the damper with distal ends of the swings fixed to the vibrator unit.

2. The linear vibration motor of claim 1 , wherein the clamping member comprises an engaging portion and a pair of swings extending perpendicularly from the engaging portion for clamping the fastening portion and the damper to the vibrator unit.

3. The linear vibration motor of claim 1 further comprising two pairs of dampers, each two dampers disposed on both sides of the fastening portion; wherein the dampers and the fastening portion are sandwiched between the engaging portion and the vibrator unit.

4. The linear vibration motor of claim 1 , wherein the vibrator unit comprises a magnet assembly and a weight suspending in the housing by the elastic members and having apertures in a central portion thereof for receiving the magnet assembly.

5. The linear vibration motor of claim 4 , wherein the magnet assembly includes a first magnet and a second magnet separately positioned in the apertures of the weight.

6. The linear vibration motor of claim 5 , wherein the first magnet has a first pole and the second magnet has a second pole;
polarities of the first and second poles are traversed to each other.

7. The linear vibration motor of claim 6 , wherein the stator unit comprises a coil fixed on the base and facing the magnet assembly with a space therebetween.

8. A linear vibration motor comprising,
a bracket;
a cover forming a receiving space together with the bracket;
a plurality of spring bodies received in the receiving space, each spring body comprises a mounting portion connected to the cover, a fastening portion and a spring strip extending from the mounting portion to the fastening portion;
a mass body elastically supported by the spring bodies for being suspended in the receiving space;
a magnetic field unit comprising a magnet assembly received in the mass body and a coil mounted on the bracket and facing the magnet assembly with space;
a plurality of cushion members, each two cushion members arranged in contact with the fastening portion and sandwiching the fastening portion;
a plurality of clamping members each corresponding to one of the spring bodies, each clamping member clamping the cushion members and the fastening portion to the mass body wherein the engaging portion presses the fastening portion and the cushion member to the mass body; one of the swings engages with upper ends of the fastening portion and the cushion members, and another swing engages with lower ends of the fastening portion and the cushion members with distal ends of the swings fixed to the mass body.

9. The linear vibration motor of claim 8 , wherein the clamping member comprises an engaging portion and a pair of swings extending perpendicularly from the engaging portion for clamping the fastening portion and the damper to the mass body.

10. The linear vibration motor of claim 9 , wherein the mass body has two apertures spaced from each other in a central portion thereof for receiving the magnet assembly.

11. The linear vibration motor of claim 10 , wherein the magnet assembly includes a first magnet and a second magnet separately positioned in the apertures respectively.

12. The linear vibration motor of claim 11 , wherein the first magnet has a first pole and the second magnet has a second pole;
polarities of the first and second poles are traversed to each other.

Assignees

• Dong Leping
• Aac Technologies Pte Ltd

Inventors

• Dong Leping

Classifications

• H02K33/16 Primary

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