Actuator

Patent metadata

Field	Value
Publication number	US-10938287-B2
Application number	US-201916260424-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Jan 31, 2018
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

An actuator may include a supporting body; a movable body; a first magnetic drive circuit including a first coil and a first magnet disposed adjacent to each other in a first direction and driving the movable body in a second direction orthogonal to the first direction; and a second magnetic drive circuit including a second coil and a second magnet disposed adjacent to each other in the first direction and driving the movable body in a third direction orthogonal to the first direction and intersecting the second direction. The second coil and the second magnet may be disposed in alignment with the first magnetic drive circuit in the first direction. The supporting body may include a restraining member. A first elastic member may be in contact with both the movable body and the restraining member. A second elastic may be in contact with both the movable body the restraining member.

First claim

What is claimed is:

1. An actuator comprising:
a supporting body comprising a plurality of components disposed in alignment with each other in a first direction and are coupled each other;
a movable body shiftable relative to the supporting body;
a first magnetic drive circuit comprising a first coil and a first magnet disposed adjacent to each other in the first direction and structured to drive the movable body in a second direction orthogonal to the first direction; and
a second magnetic drive circuit comprising a second coil and a second magnet disposed adjacent to each other in the first direction and structured to drive the movable body in a third direction orthogonal to the first direction and intersecting the second direction, the second coil and the second magnet being disposed in alignment with the first magnetic drive circuit in the first direction, wherein,
the supporting body comprises a restraining member structured to restrain the components disposed in alignment with each other in the first direction from two sides in the first direction,
a first elastic member having elasticity or viscoelasticity is disposed in contact with both the movable body and the restraining member, the first elastic member being disposed between the movable body and a portion of the restraining member adjacent to a side of the first coil on the movable body, the side of the first coil being remote from the second coil, and
a second elastic member having elasticity or viscoelasticity is disposed in contact with both the movable body the restraining member, the second elastic member being disposed between the movable body and a portion of the supporting body adjacent to a side of the second coil on the movable body, the side of the second coil being remote from the first coil.

2. The actuator according to claim 1 , wherein the first elastic member and the second elastic member are disposed while being compressed in the first direction.

3. The actuator according to claim 2 , wherein,
the restraining member comprises:
a first sheetlike part comprising:
a first end plate portion disposed adjacent to the movable body while the first elastic member is disposed between the first end plate portion and the movable body; and
a plurality of first side plate portions bent from the first end plate portion toward the second elastic member; and

a second sheetlike part comprising:
a second end plate portion disposed adjacent to the movable body while the second elastic member is disposed between the second end plate portion and the movable body; and
a plurality of second side plate portions bent from the second end plate portion toward the first elastic member,

wherein the first end plate portion is coupled with the plurality of second side plate portions, and the second end plate portion is coupled with the plurality of first side plate portions.

4. The actuator according to claim 3 , wherein the first sheetlike part and the second sheetlike part comprise metal plates.

5. The actuator according to claim 4 , wherein,
the first coil and the second coil are disposed on the supporting body, and
the first magnet and the second magnet are disposed on the movable body.

6. The actuator according to claim 5 , wherein,
the movable body comprises:
a first yoke adjacent to a side of the first elastic member remote from the first coil; and
a second yoke adjacent to a side of the second elastic member remote from the second coil,

the first elastic member is disposed between the first yoke and the restraining member, and
the second elastic member is disposed between the second yoke and the restraining member.

7. The actuator according to claim 6 , wherein the plurality of components of the supporting member comprises a first coil holder holding the first coil and a second coil holder holding the second coil.

8. The actuator according to claim 7 wherein the first elastic member and the second elastic member comprise gelatinous members.

9. The actuator according to claim 1 , wherein,
the restraining member comprises:
a first sheetlike part comprising:
a first end plate portion disposed adjacent to the movable body while the first elastic member is disposed between the first end plate portion and the movable body; and
a plurality of first side plate portions bent from the first end plate portion toward the second elastic member; and

a second sheetlike part comprising:
a second end plate portion disposed adjacent to the movable body while the second elastic member is disposed between the second end plate portion and the movable body; and
a plurality of second side plate portions bent from the second end plate portion toward the first elastic member, and

the first end plate portion is coupled with the plurality of second side plate portions, and the second end plate portion is coupled with the plurality of first side plate portions.

10. The actuator according to claim 9 , wherein the first sheetlike part and the second sheetlike part comprise metal plates.

11. The actuator according to claim 10 , wherein,
the first coil and the second coil are disposed on the supporting body, and
the first magnet and the second magnet are disposed on the movable body.

12. The actuator according to claim 11 , wherein,
the movable body comprises:
a first yoke adjacent to a side of the first elastic member remote from the first coil; and
a second yoke adjacent to a side of the second elastic member remote from the second coil,

the first elastic member is disposed between the first yoke and the restraining member, and
the second elastic member is disposed between the second yoke and the restraining member.

13. The actuator according to claim 12 , wherein the plurality of components of the supporting member comprises a first coil holder holding the first coil and a second coil holder holding the second coil.

14. The actuator according to claim 13 , wherein the first elastic member and the second elastic member comprise gelatinous members.

15. The actuator according to claim 1 , wherein,
the first coil and the second coil are disposed on the supporting body, and
the first magnet and the second magnet are disposed on the movable body.

16. The actuator according to claim 15 , wherein,
the movable body comprises:
a first yoke adjacent to a side of the first elastic member remote from the first coil; and
a second yoke adjacent to a side of the second elastic member remote from the second coil,

the first elastic member is disposed between the first yoke and the restraining member, and
the second elastic member is disposed between the second yoke and the restraining member.

17. The actuator according to claim 16 , wherein the plurality of components of the supporting member comprises a first coil holder holding the first coil and a second coil holder holding the second coil.

18. The actuator according to claim 17 , wherein the first elastic member and the second elastic member comprise gelatinous members.

19. The actuator according to claim 1 , wherein the plurality of components of the supporting member comprises a first coil holder holding the first coil and a second coil holder holding the second coil.

20. The actuator according to claim 1 , wherein the first elastic member and the second elastic member comprise gelatinous members.

Assignees

• Nidec Sankyo Corp

Inventors

• Tsuchihashi Masao
• Takeda Tadashi
• Kitahara Hiroshi

Classifications

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title

• B06B1/14

  the masses being elastically coupled · CPC title

• H02K33/12 Primary

  with armatures moving in alternate directions by alternate energisation of two coil systems · CPC title

• B06B1/04

  operating with electromagnetism (dynamo-electric motors with vibrating magnet, armature or coil system H02K33/00) · CPC title

• F16F9/30

  with solid or semi-solid material, e.g. pasty masses, as damping medium {(in devices where rotary elements are damped by viscous shear effect only, any throttling effect being immaterial F16F9/12; where members moving with a rotating system are being damped F16F15/16)} · CPC title