# US 12,223,111 B2 · Vibration motor damping member with groove

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- Number: US 12,223,111 B2
- Document ID: US12223111B2
- Status: Granted
- Kind: B2
- Application number: 17/947,194
- Filed: 2022-09-19
- Published: 2023-10-05
- Granted: 2025-02-11
- Earliest claimed: 2022-04-01
- Assignees: AAC Microtech (Changzhou) Co., Ltd.; Aac Acoustic Technologies (Shenzhen) Co., Ltd.
- Applicants: AAC Microtech (Changzhou) Co., Ltd.; Aac Acoustic Technologies (Shenzhen) Co., Ltd.
- Inventors: Jie Ma
- Web page: https://patentgrep.com/patent/US12223111B2

## CPC

- G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user}
- H02K 33/16: with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
- H02K 7/061: {using rotary unbalanced masses (for generating mechanical vibrations in general B06B1/16)}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The present disclosure discloses a linear motor having a housing with an receiving space, a vibration unit and a stator unit received in the receiving space. The vibrator unit includes a weight and an elastic member fixed to the weight. The elastic member includes a first fixation portion fixed to the housing and a second fixation portion fixed to the weight and an elastic portion. An elastic member having a groove penetrating thereon is sandwiched between the elastic portion and the weight. The elastic member includes a first damping portion and a second damping portion arranged on two opposite side f the groove along a vibration direction. The groove can effectively avoid the detachment of the elastic member from the elastic member and the weight, thus improving the vibration stability of the vibration motor.

## Claims

### Claim 1

A vibration motor comprising:
a housing with a receiving space;
a vibration unit received in the receiving space, comprising:
a weight;
a magnet fixed to the weight; and
an elastic member configured to suspend the weight in the receiving space, comprising:
a first fixation portion fixed to the housing;
a second fixation portion fixed to the weight; and
an elastic portion connecting the first fixation portion and the second fixation portion, spaced apart from the weight;
a stator unit received in the receiving space, comprising a coil facing the magnet; and
a damping member sandwiched between the elastic portion and the weight, having a groove penetrating thereon, comprising:
a first damping portion connecting with the elastic portion; and
a second damping portion connecting with the weight;
wherein the first damping portion and the second damping portion are separately arranged on two opposite sides of the groove along a vibration direction of the vibration unit;
the damping member further comprises a first side surface and a second side surface spaced apart from the first side surface along a first direction perpendicular with the vibration direction; the groove dents from the first side surface towards the second side surface; the groove is spaced apart from the second side surface;
the groove extends along the first direction; the groove penetrates the damping member along a second direction perpendicular with the vibration direction and the first direction;
a width of the first side surface along the vibration direction is larger than a width of the second side surface along the vibration direction.

### Claim 2 (depends on 1)

The vibration motor as described in claim 1, wherein the damping member further comprises a connection portion connecting the first damping portion and the second damping portion.

### Claim 3 (depends on 1)

The vibration motor as described in claim 1, wherein the weight comprises a third side surface fixed to the second damping portion and a denting portion denting from the third side surface along the vibration direction; the second damping portion comprises a main body spaced apart from the first damping portion along the vibration direction and a extending portion extending from the main body and received in the denting portion.

### Claim 4 (depends on 3)

The vibration motor as described in claim 3, wherein the main body is attached to the third side surface.

### Claim 5 (depends on 3)

The vibration motor as described in claim 3, wherein the extending portion is glued to the weight; the first damping portion is glued to the elastic portion.

### Claim 6 (depends on 1)

The vibration motor as described in claim 1, wherein the damping member is made of foam.