Linear vibration motor

Patent metadata

Field	Value
Publication number	US-10097073-B2
Application number	US-201615011486-A
Country	US
Kind code	B2
Filing date	Jan 30, 2016
Priority date	Feb 2, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A linear vibration motor is provided in the present disclosure the linear vibration motor includes a cabinet having a receiving space, a first magnet received in the accommodation space and fixed in the cabinet; a magnetic core fixed in the cabinet, opposite to the first magnet, with a coil winded on the magnetic core, a vibrating part received in the receiving space, suspended between the first magnet and the magnetic core; and a supporting part for suspending the vibrating part, and the vibrating part includes a third magnet repulsing the first magnet, the coil having a changing current to magnetize the magnetic core to repulse with the third magnet.

First claim

What is claimed is:

1. A linear vibration motor, comprising:
a cabinet having a receiving space;
a first magnet received in the accommodation space and fixed in the cabinet;
a magnetic core fixed in the cabinet, opposite to the first magnet, with a coil winded on the magnetic core;
a vibrating part received in the receiving space, suspended between the first magnet and the magnetic core; and
a supporting part for suspending the vibrating part;
the vibrating part comprising:
a third magnet repulsing the first magnet;
the coil having a changing current to magnetize the magnetic core to repulse with the third magnet to form a magnetic field to generate a force to drive the vibrating part to vibrate along a long axis direction between the first magnet and the magnetic core on which the coil is winded on;
the cabinet comprising a bottom wall, a cover opposing the bottom wall and a side wall extending from the bottom wall towards the cover, the side wall surrounding the vibrating part and fixing to the cover, wherein the side wall comprising two opposing lateral sides on one of which the first magnet is fixed and on the other of which the magnetic core is fixed, and a connecting side connecting the one of the opposing lateral sides with the other of the opposing lateral sides, and the supporting part is fixed on the connecting side;
the vibrating part keeping a distance with both the bottom wall and the cover, with neither directly nor indirectly contacting with the bottom wall and the cover.

2. The linear vibration motor of claim 1 , wherein a second magnet is mounted between the third magnet and the magnetic core, and the second magnet is fixed to the magnetic core and repulses with the third magnet.

3. The linear vibration motor of claim 2 , wherein any two adjacent magnets of the first magnet, the second magnet and the third magnet are spaced apart from each other.

4. The linear vibration motor of claim 3 , wherein the magnetic vibrating part further comprises a mass respectively attach or connect to the third magnet.

5. The linear vibration motor of claim 4 , wherein two masses are symmetrically mounted on two sides of the third magnet, each of two masses respectively forms a receiving slot facing to the third magnet, and the third magnet is clasped by the receiving slots.

6. The linear vibration motor of claim 5 , wherein each mass has a protrusion extending toward the connecting side.

7. The linear vibration motor of claim 6 , wherein the supporting part is symmetrically configured on two sides of the magnetic vibrating part along a long axis, including two complementary parts respectively mounted on the case and on the magnetic vibrating part.

8. The linear vibration motor of claim 7 , wherein the two complementary parts of the supporting part includes a first curved magnet fixed to the protrusion, and a second curved magnet fixed to the case, and the first curved magnet repulses with the second curved magnet, with a distance between the first curved magnet and the second curved magnet.

9. The linear vibration motor of claim 8 , wherein, the first curved magnet has a first contacting surface attached to the protrusion, and a convex surface opposite to the first contacting surface; the second curved magnet includes a second contacting surface fixed to the case and a concave surface opposite to the second contacting surface; the convex surface is sheathed by the concave surface with the distance therebetween.

10. The linear vibration motor of claim 1 , wherein the cabinet includes a cover and a case that cooperate with each other to form the receiving space, and the magnetic core is fixed in the case.

Assignees

• Wang Hongxing
• Guo Shun
• Mao Lubin
• Aac Technologies Pte Ltd

Inventors

• Wang Hongxing
• Guo Shun
• Mao Lubin

Classifications

• H02K33/16 Primary

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