Linear vibration motor

Patent metadata

Field	Value
Publication number	US-2016226358-A1
Application number	US-201514928373-A
Country	US
Kind code	A1
Filing date	Oct 30, 2015
Priority date	Feb 2, 2015
Publication date	Aug 4, 2016
Grant date	—

Abstract

A linear vibration motor includes a housing, a PCB at least partially covered by the housing, a sliding pair, a vibrator suspended in the housing by the sliding pair, the vibrator including a plurality of holes in a middle portion thereof for receiving a magnet assembly, a driving coil assembly located on the lid and facing the magnet assembly for actuating the magnet assembly oscillate along a direction paralleled to the bottom wall of the crust, a pair of gas springs separately located at two ends of the vibrator for providing a constantly and alternatively restoring force to vibrator for oscillating freely.

First claim

What is claimed is:

1 . A linear vibration motor, comprising:
a lid; a crust forming a housing together with the lid, the crust having a bottom wall and a plurality of sidewalls extending upwardly and perpendicularly from the bottom wall; a PCB at least partially covered by the housing; a sliding pair; a vibrator suspended in the housing by the sliding pair, the vibrator including a plurality of holes in a middle portion thereof for receiving a magnet assembly; a driving coil assembly located on the lid and facing the magnet assembly for actuating the magnet assembly oscillate along a direction paralleled to the bottom wall of the crust; a pair of gas springs separately located at two ends of the vibrator for providing a constantly and alternatively restoring force to vibrator for oscillating freely.

2 . The linear vibration motor as described in claim 1 , wherein the gas spring has a gas cylinder located in the housing, two ends of the vibrator severing as two pistons separately received corresponding to the gas cylinder forming a compression volume.

3 . The linear vibration motor as described in claim 2 , wherein the vibrator includes a first lengthwise side facing the sidewall of the crust, and a second lengthwise side opposite to the first lengthwise side.

4 . The linear vibration motor as described in claim 3 , wherein the first sliding pair is mounted on the sidewall of the crust, and the second sliding pair is separately mounted on the first and second lengthwise sides of vibrator and facing corresponding to first sliding pair corporately forming a configuration based on the electromagnetic levitation theory.

5 . The linear vibration motor as described in claim 4 , wherein a protrusion is extending from the first and second lengthwise sides of the vibrator, respectively, and the second sliding pair has a second magnet configured to a plate in shape of arc which is mounted on the protrusion.

6 . The linear vibration motor as described in claim 5 , wherein the first sliding pair has a first magnet having a surface configured to an arc for providing a sufficient magnetic repulsive surface facing the second magnet of the second sliding pair.

7 . The linear vibration motor as described in claim 6 , wherein the magnet assembly has three magnets, each of the three magnets having magnetic poles opposite to those of adjacent magnet.

8 . The linear vibration motor as described in claim 7 , wherein the driving coil assembly has a first coil and a second coil for forming two magnetism-guided loops corporately with the three magnets.

9 . The linear vibration motor as described in claim 8 , wherein the vibrator includes a body in shape of straight bar for accommodating the housing.

10 . The linear vibration motor as described in claim 9 , wherein the compression volume contains a suitable working gas such as air or helium.

11 . A linear vibration motor, comprising:
a lid; a crust forming a housing together with the lid, the crust having a bottom wall and a plurality of sidewalls extending upwardly and perpendicularly from the bottom wall; a PCB at least partially covered by the housing; a sliding pair configured to a configuration based on the electromagnetic levitation theory; a vibrator suspended in the housing by the sliding pair, the vibrator including a plurality of holes in a middle portion thereof for receiving a magnet assembly having three magnets; a driving coil assembly located on the lid and facing the magnet assembly for actuating the magnet assembly oscillate along a direction paralleled to the bottom wall of the crust; a pair of gas springs separately located at two ends of the vibrator for providing a constantly and alternatively restoring force to vibrator for oscillating freely and having a gas cylinder located in the housing and two ends of the vibrator severing as two pistons separately received corresponding to the gas cylinder forming a compression volume.

12 . The linear vibration motor as described in claim 11 , wherein the vibrator includes a body in shape of straight bar having a first lengthwise side facing the sidewall of the crust, and a second lengthwise side opposite to the first lengthwise side.

13 . The linear vibration motor as described in claim 12 , wherein the sliding pair has a first sliding pair mounted on the sidewall of crust, and a second sliding pair mounted on the first and second lengthwise side of the vibrator and facing corresponding to first sliding pair corporately forming a configuration based on the electromagnetic levitation theory.

14 . The linear vibration motor as described in claim 13 , wherein a protrusion is extending from the first and second lengthwise sides of the vibrator, respectively, and the second sliding pair has a second magnet configured to a plate in shape of arc which is mounted on the protrusion.

15 . The linear vibration motor as described in claim 14 , wherein the first sliding pair has a first magnet having a surface configured to an arc for providing a sufficient magnetic repulsive surface facing the second magnet of the second sliding pair.

16 . The linear vibration motor as described in claim 15 , wherein the driving coil assembly has a first coil and a second coil for forming two magnetism-guided loops corporately with the three magnets.

17 . The linear vibration motor as described in claim 16 , wherein the compression volume contains a suitable working gas such as air or helium.

18 . An electronic terminal device, comprising the linear vibration motor in claim 1 .

Assignees

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

Inventors

• Mao Lubin
• Guo Shun
• Wang Hongxing

Classifications

• H02K33/16 Primary

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

• H02K33/00 Primary

  Motors with reciprocating, oscillating or vibrating magnet, armature or coil system (arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06) · CPC title