IP Library › Granted Patent US 12,046,974

Granted Patent B2

US 12,046,974 · App. 17/614,376 · Granted Jul 23, 2024

Actuator

Inventors: Shogo Kasahara (Nagano, JP); Masaaki Ando (Nagano, JP); Shinji Hatano (Nagano, JP); Masao Tsuchihashi (Nagano, JP)

Assignee: NIDEC SANKYO CORPORATION

H02K33/16 F16F1/3605 H01F7/081 H02K1/34

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Quick Facts

Patent No.: US 12,046,974
App. No.: 17/614,376
Granted: Jul 23, 2024
Kind: B2

External Links

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Abstract

In an actuator, damper members which connect a movable member and a fixed member are arranged at two places between the end portion of the shaft of the movable member on an L1 side and the opening portion of the first holder of the fixed member and between the end portion of the shaft of the movable member on an L2 side and the opening portion of a second holder. Each of the damper members includes a gel damper member serving as a connection member which is continuously arranged in a gap in a radial direction between the movable member and the fixed member over the entire circumference. In the gel damper member, an inner circumferential portion is fixed to the shaft through a cylindrical first member, and an outer circumferential portion is fixed to the fixed member through a cylindrical second member.

Claims (87)

1. An actuator comprising:

a movable member that includes a shaft extending in a direction of an axis line and one of a magnet and a coil which is held by the shaft;

a fixed member that includes a tubular case which extends in the direction of the axis line and surrounds an outer circumferential side of the movable member, and the other of the magnet and the coil which is held in an inside of the tubular case; and

a connection member that connects the fixed member and the movable member,

wherein the magnet and the coil form a magnetic drive mechanism that vibrates the movable member in the direction of the axis line relative to the fixed member,

the movable member includes an inner circumferential side part that is arranged on an inner circumferential side of the fixed member,

the fixed member includes an outer circumferential side part that surrounds an outer circumferential side of the inner circumferential side part,

the connection member continuously surrounds an entire circumference of the inner circumferential side part,

an inner circumferential portion of the connection member is connected to the inner circumferential side part of the movable member and an outer circumferential portion of the connection member is connected to the outer circumferential side part of the fixed member, and

the connection member is provided on one end side and the other end side of the movable member in a direction of the vibration on both sides in the direction of the axis line with respect to the one of the magnet and the coil which is fixed to the shaft.

2. The actuator according to claim 1 ,

wherein the connection member is formed with a gel damper member.

3. The actuator according to claim 1 ,

wherein the connection member is cylindrical.

4. The actuator according to claim 1 ,

wherein a height of the inner circumferential portion of the connection member is greater than a height of the outer circumferential portion.

5. The actuator according to claim 1 ,

wherein the inner circumferential portion is connected to the inner circumferential side part over the entire circumference, and

part of the outer circumferential portion in a circumferential direction is connected to the outer circumferential side part.

6. The actuator according to claim 1 ,

wherein the connection member is arranged between a cylindrical first member and a cylindrical second member arranged on an outer circumferential side of the first member so as to connect the first member and the second member,

the inner circumferential portion is connected through the first member to the inner circumferential side part over the entire circumference and

an entire circumference of the outer circumferential portion is connected through the second member to the outer circumferential side part or part of the outer circumferential portion in a circumferential direction is connected through the second member to the outer circumferential side part.

7. The actuator according to claim 1 ,

wherein the movable member includes an inner annular member arranged on an inner circumferential side of the connection member,

the inner annular member is a weight for adjusting mass of the movable member and

the inner circumferential side part to which the connection member is fixed is provided in the inner annular member.

8. The actuator according to claim 1 ,

wherein the fixed member includes

a holder member including a coil fixing portion on which the coil is wound and

an outer annular member fixed to the holder member, and

the outer circumferential side part to which the connection member is fixed is provided in the outer annular member.

9. An actuator comprising:

a movable member that includes one of a magnet and a coil;

a fixed member that includes the other of the magnet and the coil; and

a connection member that connects the fixed member and the movable member,

wherein the magnet and the coil form a magnetic drive mechanism that vibrates the movable member relative to the fixed member,

one of the movable member and the fixed member includes an inner circumferential side part that is arranged on an inner circumferential side of the other of the movable member and the fixed member,

the other of the movable member and the fixed member includes an outer circumferential side part that surrounds an outer circumferential side of the inner circumferential side part,

the connection member continuously surrounds an entire circumference of the inner circumferential side part and

an inner circumferential portion of the connection member is connected to the inner circumferential side part and an outer circumferential portion of the connection member is connected to the outer circumferential side part,

wherein the movable member includes an inner annular member arranged on an inner circumferential side of the connection member,

the inner annular member is a weight for adjusting mass of the movable member and

the inner circumferential side part to which the connection member is fixed is provided in the inner annular member.

10. The actuator according to claim 9 ,

wherein the fixed member surrounds an outer circumferential side of the movable member, and

the inner circumferential portion of the connection member is connected to the inner circumferential side part provided in the movable member and the outer circumferential portion of the connection member is connected to the outer circumferential side part provided in the fixed member.

11. The actuator according to claim 9 ,

wherein the connection member connects the movable member and the fixed member on one end side and the other end side of the movable member in a direction of the vibration.

12. The actuator according to claim 9 ,

wherein the connection member is formed with a gel damper member.

13. The actuator according to claim 9 ,

wherein the connection member is cylindrical.

14. The actuator according to claim 9 ,

wherein the fixed member includes

a holder member including a coil fixing portion on which the coil is wound and

an outer annular member fixed to the holder member, and

the outer circumferential side part to which the connection member is fixed is provided in the outer annular member.

15. An actuator comprising: