Flat Linear Vibration Motor

Patent metadata

Field	Value
Publication number	US-2016226362-A1
Application number	US-201615011489-A
Country	US
Kind code	A1
Filing date	Jan 30, 2016
Priority date	Feb 2, 2015
Publication date	Aug 4, 2016
Grant date	—

Abstract

A flat linear vibration motor is disclosed. The flat linear vibration motor includes a housing having an accommodation space; a first magnet received in the accommodation space and fixed in the housing; and a vibrator unit suspended in the housing. The vibrator unit includes a clump weight, a third magnet, a driving magnet, and a fourth magnet; a second magnet fixed in the housing, the first magnet, the vibrator unit and the second magnet arranged one by one along a vibration direction of the vibrator unit; engaging assemblies suspending the vibrator unit inside the housing and driving the vibrator unit to move along the vibration direction; wherein the flat linear vibration motor further includes a ring driving coil received in the accommodation space, the ring driving coil being spaced from and surrounding the driving magnet.

First claim

What is claimed is:

1 . A flat linear vibration motor, including:
a housing having an accommodation space; a first magnet received in the accommodation space and fixed in the housing; a vibrator unit suspended in the housing, the vibrator unit including a clump weight, a third magnet, a driving magnet, and a fourth magnet, the third magnet being such configured that a magnetic pole thereof is samilar to an adjacent magnetic pole of the first magnet; a second magnet fixed in the housing, the first magnet, the vibrator unit and the second magnet arranged one by one along a vibration direction of the vibrator unit; the second magnet being such configured that a magnetic pole thereof is samilar to an adjacent magnetic pole of the fourth magnet; engaging assemblies suspending the vibrator unit inside the housing and enabling the vibrator unit to move along the vibration direction; wherein the flat linear vibration motor further includes a ring driving coil received in the accommodation space, the ring driving coil being spaced from and surrounding the driving magnet.

2 . The flat linear vibration motor as described in claim 1 , wherein the housing includes an upper shell and a lower shell cooperating with the upper shell for forming the accommodation space, the lower shell includes a bottom wall and a side wall extending from the bottom wall, the first magnet and the second magnet are fixed respectively on the side wall of the lower shell.

3 . The flat linear vibration motor as described in claim 1 , wherein the clump weight includes a first outer side face and a second outer side face opposed to the first outer side face, the housing includes a first inner side wall and a second inner side wall, the engaging assemblies includes a first engaging assembly located between the first outer side face and the first inner side face, and a second engaging assembly located between the second outer side face and the second inner side face.

4 . The flat linear vibration motor as described in claim 3 , wherein the first outer side face and the second outer side face extend along the vibration direction of the vibrator unit, the first inner side wall and the second inner side wall extend along the vibration direction of the vibrator unit.

5 . The flat linear vibration motor as described in claim 3 , wherein:
the first engaging assembly includes a first guide rail part fixed on the first outer side face and forming a first guide rail, and a first guide groove part fixed on the first inner side surface and forming a first guide groove, the first guide rail part being cooperating with the first guide groove part; the second engaging assembly includes a second guide rail part fixed on the second outer side face and forming a second guide rail, and a second guide groove part fixed on the second inner side surface and forming a second guide groove, the first guide rail part being cooperating with the first guide groove part; and by virtue of the cooperation between the guide rails and the guide grooves, the vibrator unit is suspended in the housing and moveable along the vibration direction.

6 . The flat linear vibration motor as described in claim 5 , wherein the first and second guide rails are made of magnetic rails, the first and second guide grooves are magnetic grooves, the first and second guide grooves respectively wrap the first and second guide rails, further, the same magnetic poles of the first guide rail and the first guide groove are configured to face to face, the same magnetic poles of the second guide rail and the second guide groove are configured to face to face, such that the first and second guide rails are suspended respectively in the first and second guide grooves.

7 . The flat linear vibration motor as described in claim 1 , wherein the clump weight forms two slots at two ends thereof along the vibration direction, the third magnet and the fourth magnet are fixed inside the slots.

8 . The flat linear vibration motor as described in claim 1 , wherein the driving magnet is a ring magnet, a bearing part is formed at a position corresponding to the driving magnet and a depress surrounding the bearing part, the driving magnet engages with the bearing part and is received in the depress.

Assignees

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

Inventors

• Wang Hongxing
• Mao Lubin
• Guo Shun

Classifications

• 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

• H02K33/16 Primary

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