Vibration generator having swing unit, frame and elastic member

Patent metadata

Field	Value
Publication number	US-10305357-B2
Application number	US-201615363879-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	May 22, 2012
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.

First claim

What is claimed is:

1. A vibrator generator comprising:
a top plate;
a bottom plate;
a frame arranged between the top plate and the bottom plate;
a swing unit arranged inside the frame;
an elastic member coupling the swing unit and the frame; and
a coil having a flat plated shape; wherein:
the coil faces the swing unit,
the swing unit includes a magnet and a weight arranged around the magnet,
an inner side surface of the frame extends in a swing direction of the swing unit,
an outer circumferential surface of the weight faces the inner side surface of the frame,
the outer circumferential surface of the weight has a recessed portion, and
the elastic member is arranged between the recessed portion and the inner side surface of the frame,
a groove is provided in a jointing surface between the elastic member and the weight, and
the jointing surface between the elastic member and the weight is uneven between a surface of the weight facing the top plate and a surface of the weight facing the bottom plate.

2. The vibrator generator according to claim 1 , wherein the elastic member includes a beam portion capable of deflecting when the swing unit moves with respect to the frame.

3. The vibration generator according to claim 1 , comprising a cuboid shape, wherein
the swing unit swings in a longitudinal direction.

4. The vibration generator according to claim 1 , wherein the swing unit moves with respect to the frame, according to current flowing in the coil.

5. The vibration generator according to claim 1 , wherein a surface of the weight on a side of the coil is recessed.

6. The vibration generator according to claim 1 , wherein a surface of the elastic member coupling with the frame is arranged at a same position as a surface of the elastic member coupling with the weight in the swing direction of the swing unit.

7. The vibration generator according to claim 1 , wherein a surface of the elastic member coupling with the frame faces a surface of the elastic member coupling with the weight.

8. The vibrator generator according to claim 1 , wherein
the weight includes a first joint jointed to the elastic member,
the elastic member includes a second joint jointed to the weight,
a part in an outer circumferential surface of the weight facing the frame forms the first joint,
the jointing surface is formed with the part in the outer circumferential surface of the first joint facing the frame and a part in an outer circumferential surface of the second joint,
the surface of the first joint facing the top plate and the surface of the second joint facing the top plate are arranged in a line in a horizontal direction, and
the surface of the first joint facing the bottom plate and the surface of the second joint facing the bottom plate are arranged in a line in the horizontal direction.

9. A vibrator generator comprising:
a top plate;
a bottom plate;
a frame arranged between the top plate and the bottom plate;
a swing unit; and
an elastic member supporting displaceably the swing unit with respect to the frame in a horizontal direction,
wherein:
the swing unit includes a weight including a first joint jointed to the elastic member,
a part in an outer circumferential surface of the weight facing the frame forms the first joint,
the elastic member includes a second joint jointed to the weight,
a jointing surface is formed with the part in the outer circumferential surface of the first joint facing the frame and a part in an outer circumferential surface of the second joint,
the part in the outer circumferential surface of the first joint forming the jointing surface or the part of the outer circumferential surface of the second joint forming the jointing surface is inclined and uneven between a surface of the weight facing the top plate and a surface of the weight facing the bottom plate,
the surface of the first joint facing the top plate and the surface of the second joint facing the top plate are arranged in a line in the horizontal direction,
the surface of the first joint facing the bottom plate and the surface of the second joint facing the bottom plate are arranged in a line in the horizontal direction.

10. A vibrator generator according to claim 9 , wherein:
the elastic member includes a beam portion,
a dimension of the beam portion in a direction from the bottom plate toward the top plate is larger than a dimension of the beam portion in the swing direction of the swing unit.

11. A vibrator generator comprising a plurality of elastic members including the elastic member, wherein
the plurality of elastic members includes a plurality of second joints including the second joint,
the weight includes a plurality of first joints including the first joint,
jointing surfaces including the jointing surface are formed with the part in the outer circumferential surface of the first joint facing the frame and the part in the outer circumferential surfaces of the second joints.

12. A vibrator generator according to claim 9 , wherein
only a part in the outer circumferential surface of the first joint forming the jointing surface is inclined and uneven between a surface of the weight facing the top plate and a surface of the weight facing the bottom plate.

13. A vibrator generator according to claim 9 , wherein
the part in the outer circumferential surface of the first joint forming the jointing surface or the part of the outer circumferential surface of the second joint forming the jointing surface is inclined in a direction from the top plate toward the bottom plate.

14. A vibrator generator according to claim 9 , wherein
an inside of the part in the outer circumferential surface of the first joint forming the jointing surface and an inside of the part in the outer circumferential surface of the second joint forming the jointing surface are inclined and uneven.

15. A vibrator generator according to claim 9 , wherein:
a groove is provided at the surface of the first joint facing the bottom plate, and
the groove forms the jointing surface.

16. A vibrator generator according to claim 9 , wherein:
a groove is provided at the surface of the second joint facing the top plate,
the groove forms the jointing surface.

17. A vibrator generator according to claim 16 , wherein
the groove is formed in a direction different from a swing direction of the swing unit.

18. A vibrator generator according to claim 9 , wherein
the jointing surface includes a plane.

19. A vibrator generator according to claim 9 , wherein
the jointing surface includes a projecting part.

20. A vibrator generator according to claim 9 , comprising a casing forming the bottom plate and the top plate and the frame, wherein
the casing includes a box-shaped outline.

Assignees

• Minebea Co Ltd

Inventors

• Nakamura Manabu

Classifications

• G04C3/107

  Controlling frequency or amplitude of the oscillating system (circuits G04C3/108) · CPC title

• B06B1/045

  using vibrating magnet, armature or coil system · CPC title

• H02K33/02

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

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K33/16 Primary

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