Vibration generating device

Patent metadata

Field	Value
Publication number	US-2016074906-A1
Application number	US-201514637600-A
Country	US
Kind code	A1
Filing date	Mar 4, 2015
Priority date	Sep 15, 2014
Publication date	Mar 17, 2016
Grant date	—

Abstract

There is provided a vibration generating device including: a housing having an internal space; a base member installed in the housing to be disposed in a central portion of the housing; a first plate installed on the base member; a first piezoelectric element installed on an upper surface of the first plate; a second piezoelectric element disposed to face the first piezoelectric element through a connection member; a second plate installed on the second piezoelectric element; and a vibration amplifying part installed on an upper surface of the second plate.

First claim

What is claimed is:

1 . A vibration generating device comprising:
a housing having an internal space; a base member installed in the housing to be disposed in a central portion of the housing; a first plate installed on the base member; a first piezoelectric element installed on an upper surface of the first plate; a second piezoelectric element disposed to face the first piezoelectric element through a connection member; a second plate installed on the second piezoelectric element; and a vibration amplifying part installed on an upper surface of the second plate.

2 . The vibration generating device of claim 1 , wherein the vibration amplifying part includes:
an elastic member of which one end is fixedly installed on a central portion of the second plate; and a mass body which is connected to the other end of the elastic member.

3 . The vibration generating device of claim 2 , wherein the vibration amplifying part further includes a yoke to which an edge of the elastic member is fixed and which is provided to fix the mass body.

4 . The vibration generating device of claim 2 , further comprising a damper member installed on the upper surface of the second plate and preventing contact between the second plate and the mass body.

5 . The vibration generating device of claim 2 , wherein the elastic member includes:
a bonded installation portion fixedly installed on the upper surface of the second plate; a ring portion disposed outside of the bonded installation portion and having a ring shape; and an elastic deformation portion connecting the bonded installation portion and the ring portion to each other.

6 . The vibration generating device of claim 1 , further comprising a circuit board connected to the first piezoelectric element and having one end which is exposed externally from the housing.

7 . The vibration generating device of claim 6 , wherein the circuit board is electrically connected to the first and second piezoelectric elements.

8 . The vibration generating device of claim 7 , wherein the connection member comprises a plurality of connection members which are disposed to be spaced apart from each other in a circumferential direction.

9 . The vibration generating device of claim 1 , wherein the first and second piezoelectric elements are deformed in opposite directions.

10 . The vibration generating device of claim 2 , further comprising:
a first contact prevention member installed on at least one of an upper surface of the mass body and a ceiling surface of the housing in order to prevent contact between the mass body and the housing, and a second contact prevention member installed on at least one of an outer peripheral surface of the mass body and an inner peripheral surface of the housing in order to prevent contact between the mass body and the housing when the mass body is tilted.

11 . A vibration generating device comprising:
a housing including a case having an internal space and having a lower end portion that is open, and a bracket coupled to the lower end portion of the case to form a closed space; a base member fixedly installed on the bracket to be disposed in a central portion of the bracket; a first plate installed on the base member; a first piezoelectric element installed on an upper surface of the first plate; a second piezoelectric element disposed to face the first piezoelectric element through a connection member; a second plate installed on the second piezoelectric element; an elastic member having one end which is fixedly installed on a central portion of the second plate; and a mass body connected to the other end of the elastic member.

Assignees

• Samsung Electro Mech
• Iucf Hyu

Inventors

• Jeong Seung Hyeon
• Oh Hwa Young
• Jang Gun Hee
• Nam Ja Hyun
• Kim Young Jin

Classifications

• B06B1/0607 Primary

  using multiple elements (B06B1/064 and B06B1/0688 take precedence) · CPC title

• H02N2/046 Primary

  for conversion into rotary motion · CPC title

• H02P21/05

  specially adapted for damping motor oscillations, e.g. for reducing hunting · CPC title

• H01H3/3042

  using a torsion spring · CPC title

• H02N2/04

  Constructional details · CPC title