Vibration motor

Patent metadata

Field	Value
Publication number	US-10797576-B2
Application number	US-201615358607-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Jun 23, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A vibration motor is disclosed. The vibration motor includes a housing; an elastic connecting piece; a fixed component; a vibrating component comprising a counterweight suspended in the housing by the elastic connecting piece; and a damping piece accommodated in the housing and fixed on the counterweight. One of the fixed component and the vibrating component includes coils, and the other includes a magnet. The counterweight includes a restricting protrusion extending from a side facing the elastic connecting piece for abutting against and restricting the damping piece.

First claim

What is claimed is:

1. A vibration motor comprising:
a housing;
an elastic connecting piece;
a vibrating component, the vibrating component comprises a counterweight suspended in the housing by the elastic connecting piece;
a fixed component, the fixed component includes coils while the vibrating component includes a magnet, or the fixed component includes a magnet while the vibrating component includes coils;
a damping piece, the damping piece is directly fixed on a side of the counterweight and can be subjected to elastic deformation along the vibrating direction of the vibrating component;
wherein
the counterweight includes a restricting protrusion extending from the side of the counterweight for abutting against and restricting the damping piece.

2. The vibration motor as described in claim 1 , wherein the damping piece and the counterweight are complementary to each other.

3. The vibration motor as described in claim 2 , wherein the damping piece comprises an insertion part, and the side of the counterweight is provided with a slot matching with the insertion part; the restricting protrusion comprises a main body part abutting against the side of the counterweight and a projecting part matching with the slot.

4. The vibration motor as described in claim 3 , wherein the housing comprises a cover plate; the fixed component is fixed on the cover plate; a bearing surface is formed on a surface of the restricting protrusion facing the cover plate, and matches with a contact surface on the damping piece correspondingly.

5. The vibration motor as described in claim 4 , wherein the vibrating component comprises a magnet and a pole plate; the magnet is accommodated in the counterweight; and the pole plate is adhered to an end surface on the counterweight far from the cover plate.

6. The vibration motor as described in claim 2 , wherein the counterweight comprises an insertion part formed in the way of extending on the side of the counterweight, and the damping piece is provided with a slot matching the insertion part; the restricting protrusion has a bearing surface to which the insertion part is adhered.

7. The vibration motor as described in claim 1 , wherein the side of the counterweight is a plane; the restricting protrusion comprises a main body part abutting against the side of the counterweight; and an adhesive layer is also arranged between the damping piece and the main body part.

8. The vibration motor as described in claim 7 , wherein the adhesive layer is a layer of double-faced adhesive tape, or a layer of resin glue or gum.

9. The vibration motor as described in claim 2 , wherein two restricting protrusions are arranged on the side of the counterweight at interval along a direction vertical to a vibrating direction of the vibration motor.

Assignees

• Wu Na
• Chai Zhilin
• Shao Yan
• Ling Fanghua
• Aac Technologies Pte Ltd

Inventors

• Wu Na
• Chai Zhilin
• Shao Yan
• Ling Fanghua

Classifications

• 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

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• H02K33/16 Primary

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