Vibration generator

Patent metadata

Field	Value
Publication number	US-9312744-B2
Application number	US-201313748972-A
Country	US
Kind code	B2
Filing date	Jan 24, 2013
Priority date	Mar 2, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A vibration generator includes a housing, a vibrating body arranged inside of a circumferential wall portion of the housing, and a band-like leaf spring arranged between the vibrating body and the circumferential wall portion. The leaf spring includes a connection portion connected to the vibrating body, an attachment portion attached to the circumferential wall portion of the leaf spring and an intermediate portion formed between the connection portion and the attachment portion to extend around the vibrating body. The connection portion and the attachment portion are arranged at one transverse side and the other transverse side of the vibrating body along a direction intersecting a vibration direction of the vibrating body. The intermediate portion is arranged in a vibration-direction outer region of the vibrating body and formed in a single layer to extend across the vibration direction of the vibrating body.

First claim

What is claimed is:

1. A vibration generator, comprising: a housing including a circumferential wall portion extending along a peripheral edge of the housing; a vibrating body arranged inside of the circumferential wall portion of the housing in an opposing relationship with a coil and configured to reciprocatingly vibrate in one direction, the vibrating body having a first profile extending in a longitudinal direction having a first end and a second end, the first end opposite to the second end in the longitudinal direction of the vibrating body; a band-like leaf spring arranged between the vibrating body and the circumferential wall portion to support the vibrating body on the circumferential wall portion, wherein the leaf spring has a second profile entirely located outside the first profile of the vibrating body in a plan view, the leaf spring comprising a first attachment portion, a first intermediate portion, a connection portion, a second intermediate portion and a second attachment portion, wherein the connection portion is connected to the first end of the vibrating body, wherein the first attachment portion and the second attachment portion are attached to the circumferential wall portion, such that the first attachment portion and the second attachment portion are separated from and opposed to the second end of the vibrating body, wherein the first intermediate portion extends between the connection portion and the first attachment portion, and the second intermediate portion extends between the connection portion and the second attachment portion.

2. The vibration generator of claim 1 , wherein the vibrating body includes a pair of weights arranged in vibration-direction outer regions of the vibrating body and a magnet arranged between the weights.

3. The vibration generator of claim 2 , wherein each of the weights includes a lateral weight portion arranged in each of the vibration-direction outer regions of the vibrating body and a central weight portion arranged at the other transverse side of the vibrating body along the direction intersecting the vibration direction of the vibrating body to extend from the lateral weight portion toward the vibration-direction center of the vibrating body.

4. The vibration generator of claim 3 , wherein the lateral weight portion is arranged outward of an outer peripheral portion of the coil in the vibration direction of the vibrating body.

5. The vibration generator of claim 4 , wherein the lateral weight portion includes a surface lying at the side of the coil and protruding toward a rear surface of the coil beyond a front surface of the coil opposed to the vibrating body.

6. The vibration generator of claim 1 , wherein the leaf spring includes a first and a second leaf spring respectively arranged at the vibration-direction opposite sides of the vibrating body.

7. The vibration generator of claim 1 , wherein the housing further includes a bottom member to which the coil is attached and a case having the circumferential wall portion and a top portion closing a top end thereof, the vibrating body including an upper surface making contact with an inner surface of the top portion, and the vibration generator further comprises: a sliding member arranged on at least one of an upper surface of the vibrating body and an inner surface of the top portion to smoothly slide the vibrating body with respect to the inner surface of the top portion.

8. The vibration generator of claim 1 , wherein the coil is a hollow-core spiral coil formed by spirally winding a wire, the bottom member of the housing having a communication groove interconnecting the inside and the outside of the coil, the coil including a lead wire extending from an inner edge of the coil and passing through the communication groove.

Assignees

• Nidec Seimitsu Corp

Inventors

• Akanuma Tomohiro
• Yamada Yuuki
• Inoue Tetsuya

Classifications

• H02K33/00 Primary

  Motors with reciprocating, oscillating or vibrating magnet, armature or coil system (arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06) · CPC title

• H04M19/047

  Vibrating means for incoming calls · CPC title

• H02K35/00

  Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit (arrangements for handling mechanical energy structurally associated with generators H02K7/00, e.g. H02K7/06) · CPC title

• H02K33/16 Primary

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

• B06B1/045

  using vibrating magnet, armature or coil system · CPC title