Linear vibration generator including plate type spring having bent portion

Patent metadata

Field	Value
Publication number	US-10892674-B2
Application number	US-201816166322-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Oct 25, 2017
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A linear vibration generator including a plate type spring each having bent portions includes: a case for covering top and side portions thereof; a bracket coupled to the underside of the case; a coil fixed to one side of a top surface of the bracket and receiving external power from an FPCB; a plate type spring having bent portions and configured to allow one end thereof to be fixed to a vibrator; and the vibrator having a weight fixed to one end of the plate type springs and a magnet insertedly fixed to a hollow portion of the weight.

First claim

What is claimed is:

1. A linear vibration generator comprising:
a case ( 100 ) for covering top and side portions thereof;
a bracket ( 200 ) coupled to the underside of the case ( 100 );
a coil ( 400 ) fixed to one side of a top surface of the bracket ( 200 ) and receiving external power from an FPCB ( 300 );
a plate type spring ( 500 ) having bent portions ( 510 ) and a support cup ( 520 ) and configured to allow one end thereof to be fixed to a vibrator ( 800 ); and
the vibrator ( 800 ) having a weight ( 600 ) fixed to one end of the plate type spring ( 500 ) and a magnet ( 700 ) insertedly fixed to a hollow portion ( 610 ) of the weight ( 600 ).

2. The linear vibration generator according to claim 1 , wherein the plate type spring ( 500 ) is formed of one unitary spring having a through hole ( 530 ) formed on the center thereof to insert the coil ( 400 ) thereinto.

3. The linear vibration generator according to claim 1 , wherein the support cup ( 520 ) is formed to be fixed to the magnet ( 700 ), while supporting the weight ( 600 ) thereagainst.

4. The linear vibration generator according to claim 1 , wherein the plate type spring ( 500 ) is composed of an even number of plate type sub-springs symmetrical with and spaced apart from each other by a given distance around the center axis of the weight ( 600 ).

5. The linear vibration generator according to claim 1 , wherein the weight ( 600 ) has a shape of a rectangle and comprises first machined portions ( 620 ) formed on four corners of the rectangular shape thereof or at least two or more second machined portions ( 630 ) formed on both sides of the center thereof.

Assignees

• Mplus Co Ltd

Inventors

• Kim Nam Sock
• Chung Seuk Hwan

Classifications

• H02K1/34

  Reciprocating, oscillating or vibrating parts of the magnetic circuit · CPC title

• H02K33/16

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

• F16F1/187

  shaped into an open profile, i.e. C- or U-shaped · CPC title

• H02K33/02 Primary

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title

• H02K5/24 Primary

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