ACTUATOR AND ELECTRONIC EQUIPMENT HAVING THE SAME

• US 20160091052A1
• Filed: 09/24/2015
• Published: 03/31/2016
• Est. Priority Date: 09/25/2014
• Status: Abandoned Application

• Current Assignee: Moatech Co., Ltd. (MinebeaMitsumi Inc.)
• Original Assignee: Moatech Co., Ltd. (MinebeaMitsumi Inc.)
• Inventors: PARK, In-Yong, CHOI, Yun, PARK, Seong-Gi
• Application Number:
  US14/863,483
• Publication Number:
  US 20160091052A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16H 2055/065 Moulded gears, e.g. inserts therefor
• CPC Class Codes: F16H 55/06 Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties coatings for lubrication F16H57/041; producing gear wheels from plastics or substances in a plastic state B29D15/00; heat treatment C21D9/32; electrolytic surface treatment C25D; heating by electromagnetic field H05B6/00
• CPC Class Codes: F16H 55/22 for transmissions with crossing shafts, especially worms, worm-gears
• CPC Class Codes: F16H 57/0025 with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods

Abstract

Provided herein is an actuator including a housing unit, a drive unit installed in the housing unit, the drive unit having a rotating shaft, a plurality of gears installed in the housing unit and rotated by rotational power of the shaft, the gears being engaged with each other, and a reinforcement part installed in an inside portion of one of the plurality of gears to create reinforcing force. Also, provided herein is an electronic apparatus having the actuator.

Claims

1. An actuator comprising:

a housing unit;

a drive unit installed in the housing unit, the drive unit having a rotating shaft;

a plurality of gears installed in the housing unit and rotated by rotational power of the shaft, the gears being engaged with each other; and

a reinforcement part installed in an inside portion of one of the plurality of gears to create reinforcing force.

2. The actuator according to claim 1, wherein the plurality of gears comprises:

a first gear connected to the shaft arranged along a first axis and configured to rotate;

a second gear configured to rotate about a second axis perpendicular to the first axis in connection with the first gear; and

a third gear configured to rotate about a third axis perpendicular to the second axis in connection with the second gear,

wherein the second gear is a multi-step gear formed stepwise,

wherein the reinforcement part is inserted into an inside of a lower end of the multi-step gear.

3. The actuator according to claim 2, wherein the second gear comprises an upper gear and a lower gear, the lower gear being formed at a lower end of the upper gear and having a greater diameter than the upper gear,

wherein an installation hole is formed at a center of the lower gear,

wherein the reinforcement part is fixedly inserted into the installation hole.

4. The actuator according to claim 3, wherein the reinforcement part is a reinforcement member made of a metallic material and formed in a ring shape.

5. The actuator according to claim 3, wherein the reinforcement part is a reinforcement member having two steps.

6. The actuator according to claim 3, wherein the reinforcement part is a reinforcement member having multiple steps.

7. The actuator according to claim 1, wherein a height of the reinforcement part is covered by a length of the rotation shaft penetrating the gears to rotatably support the gears,

wherein the reinforcement part closely contacts an outer surface of the rotation shaft.

8. The actuator according to claim 1, wherein one region of the reinforcement part is positioned on an axis perpendicular to an axial line of rotation of a counterpart gear part engaged with the reinforcement part.

9. The actuator according to claim 4, wherein a thickness of the reinforcement member in a direction of centripetal force is greater than a thickness of the lower gear.

10. The actuator according to claim 4, wherein the reinforcement member is one of a ball bearing and a sleeve bearing.

11. The actuator according to claim 1, wherein the reinforcement part is installed at the plurality of gears through one of press fitting, welding, caulking and injection molding.

12. The actuator according to claim 2, wherein one end of the first gear is provided with a bearing,

wherein the housing unit is provided with a bearing accommodation portion, the bearing being accommodated in the bearing accommodation portion.

13. The actuator according to claim 12, wherein a bearing cover for covering the bearing is detachably installed at the bearing accommodation portion.

14. An electronic apparatus comprising the actuator according to claim 1.