Vibration motor

Patent metadata

Field	Value
Publication number	US-11043888-B2
Application number	US-201916526981-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Aug 3, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

Disclosed is a vibration motor including: a housing having an accommodating space, a first vibrator accommodated in the housing and having a coil, a first elastic component elastically supporting the first vibrator, and a circuit board electrically connected to outside. The first elastic component includes a first fixed portion, an elastic arm bending and extending from the first fixed portion, and a second fixed portion bending and extending from the elastic arm. The first elastic component includes substrate layers located on two sides and a damping layer sandwiched therebetween. A lead is disposed in the damping layer. The lead extends along the first elastic component and respectively extends out of the first and second fixed portion to form a first and second electrical conductive terminal. The first electrical conductive terminal is electrically connected to the circuit board. The second electrical conductive terminal is electrically connected to the coil.

First claim

What is claimed is:

1. A vibration motor, comprising:
a housing having an accommodating space,
a first vibrator accommodated in the housing and having a coil,
a first elastic component elastically supporting the first vibrator, and
a circuit board fixed on the housing and electrically connected to outside;
wherein the first elastic component comprises:
a first fixed portion fixed on the first vibrator,
an elastic arm bending and extending from the first fixed portion, and
a second fixed portion bending and extending from the elastic arm, the second fixed portion is fixed with the housing;

wherein the first elastic component comprises:
two substrate layers, and
a damping layer sandwiched between the two substrate layers;
wherein a lead is disposed in the damping layer; the lead extends along the first elastic component and respectively extends out of the first fixed portion and the second fixed portion to form a first electrical connection terminal and a second electrical connection terminal; the first electrical connection terminal is electrically connected to the circuit board, and the second electrical connection terminal is electrically connected to the coil.

2. The vibration motor according to claim 1 , wherein the vibration motor further comprises:
a second vibrator moving relative to the first vibrator, and
a second elastic component elastically supporting the second vibrator;
wherein a magnetic circuit corresponding to the coil is disposed the second vibrator; the coil is used to interact with the magnetic circuit to generate a driving force to drive the first vibrator and the second vibrator to move relatively.

3. The vibration motor according to claim 1 , wherein the substrate layer is a metal spring plate.

4. The vibration motor according to claim 3 , wherein the damping layer is a glue layer.

5. The vibration motor according to claim 2 , wherein the first vibrator comprises:
a first mass block,
the coil fixed on the first mass block, and
a wiring board electrically connected to the coil;
wherein the second electrical connection terminal is electrically connected to the wiring board and is electrically connected to the coil via the wiring board.

6. The vibration motor according to claim 5 , wherein the housing comprises:
a top wall,
a bottom wall disposed opposite and spaced from the top wall, and
a side wall connecting the top wall and the bottom wall;
wherein the circuit board is a flexible circuit board, and comprises:
a main body portion attached to the top wall,
an extending portion bending and extending from the main body portion in a direction towards the bottom wall, and
a first electrically conductive terminal bending and extending from the extending portion;
wherein a notch is formed corresponding to the first electrically conductive terminal in the housing, and the first electrically conductive terminal extends out of the housing through the notch.

7. The vibration motor according to claim 6 , wherein the extending portion is attached to the side wall, and the first electrically conductive terminal is affixed on the bottom wall and extends out of the housing.

8. The vibration motor according to claim 7 , wherein
the main body portion comprises two second electrically conductive terminals respectively located on two sides of the top wall;
at least two first elastic components are respectively disposed on two sides of the first vibrator in a vibration direction; and
the second fixed portion of the first elastic component is respectively electrically connected to the second electrically conductive terminals.

9. The vibration motor according to claim 5 , wherein the second vibrator comprises a second mass block, a vertically penetrating through hole is provided in the second mass block, the magnetic circuit comprises at least one permanent magnet disposed in the through hole, and the permanent magnet is disposed corresponding to the coil.

10. The vibration motor according to claim 9 , wherein a fixing groove concave in a direction away from a second mass block is provided in the first mass block, the coil is fixed in the fixing groove, and the wiring board is disposed in the fixing groove and is attached to the coil.

11. The vibration motor according to claim 2 , wherein the substrate layer is a metal spring plate.

12. The vibration motor according to claim 11 , wherein the damping layer is a glue layer.

Assignees

• Aac Acoustic Tech Shenzhen Co Ltd

Inventors

• Tang Yun
• Mao Lubin

Classifications

• B06B1/045

  using vibrating magnet, armature or coil system · CPC title

• H02K33/14

  wherein the alternate energisation and de-energisation of the two coil systems are effected or controlled by movement of the armatures · CPC title

• H02K33/16 Primary

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

• H02K33/18 Primary

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title