Vibration generator moving vibrator by magnetic field generated by coil and holder used in vibration-generator

Patent metadata

Field	Value
Publication number	US-12374977-B2
Application number	US-202217725005-A
Country	US
Kind code	B2
Filing date	Apr 20, 2022
Priority date	Sep 22, 2011
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.

First claim

What is claimed is:

1. A vibration generator comprising:
a vibrator;
a chassis surrounding the vibrator, the chassis being formed with
a frame including side surfaces and an upper surface; and
a bottom plate; and

a holder, inside the frame, displaceably supporting the vibrator with respect to the frame, the holder including members including a columnar shape, the members being attached to the side surfaces of the frame, and extending in a direction from the upper surface of the frame to the bottom plate and directly facing a surface of the bottom plate in the direction from the upper surface of the frame to the bottom plate, wherein
the vibrator is configured to be displaced with respect to the members in a direction that the surface of the bottom plate extends.

2. The vibration generator according to claim 1 , wherein
the members are made of a resin.

3. The vibration generator according to claim 1 , wherein
the vibrator includes a weight.

4. The vibration generator according to claim 1 , comprising:
a coil disposed at the bottom plate, wherein
the coil and the vibrator oppose in the direction from the upper surface of the frame to the bottom plate.

5. The vibration generator according to claim 1 , comprising:
a coil disposed at the bottom plate, wherein
the coil and the vibrator oppose in a winding axis direction of the coil.

6. The vibration generator according to claim 1 , wherein
the vibrator includes a magnet, and
a coil and the magnet oppose in a winding axis direction of the coil.

7. The vibration generator according to claim 1 , wherein the holder includes:
a retention unit retaining the vibrator; and
an arm or an elastic material connecting one of the members and the retention unit, the arm or the elastic material including a beam shape.

8. The vibration generator according to claim 1 , wherein:
the chassis increases a stiffness of the vibration generator.

9. The vibration generator according to claim 1 , wherein:
the bottom plate has a plate shape and increases a stiffness of the vibration generator.

10. A vibration generator comprising:
a vibrator;
a chassis surrounding the vibrator, the chassis being formed with
a frame including side surfaces surrounding the vibrator and an upper surface; and
a bottom plate; and

a holder, inside the frame, displaceably supporting the vibrator with respect to the frame, the holder including members including a columnar shape, the members being attached to the side surfaces of the frame, and extending in a direction from the upper surface of the frame to the bottom plate and opposing a surface of the bottom plate in the direction from the upper surface of the frame to the bottom plate, wherein
the vibrator is configured to be displaced with respect to the members in a first direction that the surface of the bottom plate extends, and
the holder includes:
a retention unit retaining the vibrator; and
an arm or an elastic material connecting one of the members and the retention unit, the arm or the elastic material being arranged between the one of the members and the retention unit in a second direction that the surface of the bottom plate extends.

11. The vibration generator according to claim 10 , wherein
the members are made of a resin.

12. The vibration generator according to claim 10 , wherein
the vibrator includes a weight.

13. The vibration generator according to claim 10 , comprising:
a coil disposed at the bottom plate, wherein
the coil and the vibrator oppose in the direction from the upper surface of the frame to the bottom plate.

14. The vibration generator according to claim 10 , comprising:
a coil disposed at the bottom plate, wherein
the coil and the vibrator oppose in a winding axis direction of the coil.

15. The vibration generator according to claim 10 , wherein
the vibrator includes a magnet, and
a coil and the magnet oppose in a winding axis direction of the coil.

16. The vibration generator according to claim 10 , wherein
the arm or the elastic material has a beam shape.

17. The vibration generator according to claim 10 , wherein:
the chassis increases a stiffness of the vibration generator.

18. The vibration generator according to claim 10 , wherein:
the bottom plate has a plate shape and increases a stiffness of the vibration generator.

Assignees

• Minebea Mitsumi Inc

Inventors

• Kuroda Minoru
• Tanaka Makoto

Classifications

• H02K5/02

  Casings or enclosures characterised by the material thereof · CPC title

• H02K1/34

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

• H02K1/06

  characterised by the shape, form or construction · CPC title

• B06B1/045

  using vibrating magnet, armature or coil system · CPC title

• H02K7/065

  Electromechanical oscillators; Vibrating magnetic drives · CPC title