Anti-tilt electromagnetic motor

Patent metadata

Field	Value
Publication number	US-10305359-B2
Application number	US-201715419298-A
Country	US
Kind code	B2
Filing date	Jan 30, 2017
Priority date	Jun 23, 2014
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

An anti-tilt electromagnetic motor is provided, including a frame, a support base, a contact assembly, a drive assembly, and an elastic assembly. The support base is arranged movably relative to the frame along an axis. The contact assembly is disposed between the frame and the support base and directly contacts the frame and the support base. The drive assembly is configured to drive the support base to move. The elastic assembly is configured to provide a pre-loading force so as to enable the contact assembly to be compressed by the frame and the support base.

First claim

What is claimed is:

1. An anti-tilt electromagnetic motor for moving a lens assembly, comprising:
a frame, defining a center and a first axis extending through the center;
a support base, supporting the lens assembly and arranged movably relative to the frame along a main axis of the anti-tilt electromagnetic motor which is perpendicular to the first axis;
a contact assembly, including a plurality of ball bearings movably disposed in a gap between the frame and the support base, wherein the ball bearings are situated on opposite sides of the first axis and in contact with the frame and the support base;
a drive assembly, configured to actuate a movement of the support base relative to the frame; and
an elastic element, extending across the gap and directly connecting the support base with the frame, wherein the elastic element has a plurality of first fixing portions fixed to the frame and a plurality of second fixing portions fixed to the support base, wherein the ball bearings are situated between the first and second fixing portions along a direction parallel to the first axis, and wherein the elastic element is arranged on a plane which is perpendicular to the main axis.

2. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the elastic element has a plurality of first fixing portions fixed to the frame and a plurality of second fixing portions fixed to the support base, wherein the first and second fixing portions are situated on opposite sides of a central axis of the frame which is perpendicular to the first axis and the main axis.

3. The anti-tilt electromagnetic motor as claimed in claim 2 , wherein the support base and the drive assembly are arranged along the first axis, and the first fixing portions and the drive assembly are situated on the same side of the central axis of the frame which is perpendicular to the first axis and the main axis.

4. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the elastic element has a plurality of first fixing portions fixed to the frame and symmetrical with respect to the first axis.

5. The anti-tilt electromagnetic motor as claimed in claim 4 , wherein the elastic element has a plurality of second fixing portions fixed to the support base and symmetrical with respect to the first axis.

6. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the elastic element is configured to provide a pre-loading force to press the ball bearings between the frame and the support base.

7. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the frame has a rectangular structure, and the ball bearings are disposed near the corners of the rectangular structure.

8. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the ball bearings are disposed along a second axis of the frame which is perpendicular to the first axis.

9. The anti-tilt electromagnetic motor as claimed in claim 1 , wherein the ball bearings are disposed along a second axis of the frame which is perpendicular to the first axis, and the second axis extends through the lens assembly.

10. An anti-tilt electromagnetic motor for moving a lens assembly, comprising:
a frame, defining a center and a first axis extending through the center; a support base, supporting the lens assembly and arranged movably relative to the frame along a main axis of the anti-tilt electromagnetic motor which is perpendicular to the first axis;
a contact assembly, including a plurality of ball bearings movably disposed in a gap between the frame and the support base;
an elastic element, having a plurality of first fixing portions fixed to the frame and a plurality of second fixing portions fixed to the support base, extending across the gap and directly connecting the support base with the frame, wherein the ball bearings are situated between the first and second fixing portions along a direction parallel to the first axis, wherein the elastic element is arranged on a plane which is perpendicular to the main axis; and
a drive assembly, configured to actuate a movement of the support base relative to the frame, wherein the support base and the drive assembly are arranged along the first axis, and the first fixing portions and the drive assembly are situated on the same side of a central axis of the frame which is perpendicular to the first axis and the main axis.

11. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the first and second fixing portions are situated on opposite sides of a central axis of the frame which is perpendicular to the first axis and the main axis.

12. The anti-tilt electromagnetic motor as claimed in claim 11 , wherein the elastic element forms a U-shaped structure with the first fixing portions respectively disposed at both ends thereof.

13. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the elastic element has a plurality of first fixing portions fixed to the frame and symmetrical with respect to the first axis.

14. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the elastic element has a plurality of second fixing portions fixed to the support base and symmetrical with respect to the first axis.

15. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the elastic element is configured to provide a pre-loading force to press the ball bearings between the frame and the support base.

16. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the frame has a rectangular structure, and the ball bearings are disposed near the corners of the rectangular structure.

17. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the ball bearings are disposed along a second axis of the frame which is perpendicular to the first axis.

18. The anti-tilt electromagnetic motor as claimed in claim 10 , wherein the ball bearings are disposed along a second axis of the frame which is perpendicular to the first axis, and the second axis extends through the lens assembly.

Assignees

• Tdk Taiwan Corp

Inventors

• Song Bing Ru
• Yu Cheng Kai
• Hu Chao Chang

Classifications

• G02B7/1828

  using magnetic means · CPC title

• H02K41/02 Primary

  Linear motors; Sectional motors · CPC title

• G02B7/10

  by relative axial movement of several lenses, e.g. of varifocal objective lens · CPC title

• G02B7/02

  for lenses {(supports for magnifying lenses G02B25/002)} · CPC title

• G02B7/08

  adapted to co-operate with a remote control mechanism · CPC title