Electromagnetic driving module and camera device using the same

• US 10,261,284 B2
• Filed: 05/03/2018
• Issued: 04/16/2019
• Est. Priority Date: 11/23/2015
• Status: Active Grant

• Current Assignee: Tdk Taiwan Corp. (TDK Corporation)
• Original Assignee: Tdk Taiwan Corp. (TDK Corporation)
• Inventors: Huang, Shih-Ting, Liao, Yu-Huai, Chan, Yi-Liang, Moto, Ichitai
• Primary Examiner(s): Pinkney, Dawayne
• Application Number:
  US15/970,132
• Publication Number:
  US 20180252891A1
• Time in Patent Office: 348 Days
• Field of Search: 359697-698, 359694, 359808, 359811-830
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 3/10 Power-operated focusing
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H01F 2007/062 Details of terminals or connectors for electromagnets
• CPC Class Codes: H01F 2007/068 using printed circuit coils
• CPC Class Codes: H01F 7/064 Circuit arrangements for actuating electromagnets circuit arrangements for obtaining special operating characteristics H01F7/18; driving circuits for electromagnets making use of a switching regulator H01H47/325
• CPC Class Codes: H01F 7/08 with armatures
• CPC Class Codes: H01H 2219/066 Lens
• CPC Class Codes: H01H 50/021 structurally combining a relay and an electronic component, e.g. varistor, RC circuit auxiliary switch inserting resistor during closure H01H50/543

Abstract

An electromagnetic driving assembly is provided, including a movable member, a fixed member, a plurality of suspension wires, an electromagnetic component, a conductive layer, and a terminal. The fixed member is spaced apart from the movable member, wherein the movable member and the fixed member are arranged along the main axis. The plurality of suspension wires are elastically connecting the movable member and the fixed member. The electromagnetic component is for driving the movable member to move relative to the fixed member. The conductive layer is formed in the fixed member and electrically connected to the electromagnetic component through the suspension wires. The terminal is exposed by and partially embedded in the fixed member, and electrically connected to the conductive layer, wherein one end of each of the suspension wires is positioned in a recess of the fixed member.

Claims

1. An electromagnetic driving assembly, comprising:

a movable member;

a fixed member spaced apart from the movable member, wherein the movable member and the fixed member are arranged along a main axis;

a case having a top surface and a sidewall, wherein the sidewall extends from a side of the top surface along the main axis, the fixed member and the case form an accommodating space, the movable member is disposed in the accommodating space, and the fixed member is closer to a light emitting position relative to the case;

a plurality of suspension wires elastically connecting the movable member and the fixed member;

a spring sheet connected to one end of one of the suspension wires, wherein the spring sheet is directly contacted with the movable member;

an electromagnetic component for driving the movable member to move relative to the fixed member;

a conductive layer formed in the fixed member and electrically connected to the electromagnetic component through the suspension wires; and

a terminal exposed by and partially embedded in the fixed member, and electrically connected to the conductive layer, wherein one end of each of the suspension wires is positioned in a recess of the fixed member.

2. The electromagnetic driving assembly as claimed in claim 1, further comprising an adhesive material connected to the end of each of the suspension wires and positioned at the recesses.

3. The electromagnetic driving assembly as claimed in claim 2, wherein the adhesive material does not protrude above an upper surface of the fixed member.

4. The electromagnetic driving assembly as claimed in claim 1, wherein the movable member further comprises flanges, and the end of each of the suspension wires is respectively connected to one of the flanges.

5. The electromagnetic driving assembly as claimed in claim 1, wherein the fixed member comprises a coil substrate and a lower substrate, the conductive layer is positioned in the lower substrate and arranged at a position that is near the coil substrate, and the terminal is exposed by the lower substrate.

6. The electromagnetic driving assembly as claimed in claim 1, wherein the fixed member comprises a coil substrate and a lower substrate, the conductive layer is positioned in the lower substrate, and the terminal is exposed by the lower substrate, and a bottom surface of the coil substrate and a top surface of the lower substrate are formed integrally.

7. The electromagnetic driving assembly as claimed in claim 1, wherein the fixed member comprises a plurality of insulation layers, and the conductive layer is sandwiched between insulation layers.

8. The electromagnetic driving assembly as claimed in claim 1, wherein the fixed member comprises an extending portion extending in a direction that is parallel to the main axis, wherein the terminal is exposed by a lateral surface of the extending portion away from the main axis and is covered by a lateral surface of the extending portion near the main axis.

9. The electromagnetic driving assembly as claimed in claim 1, wherein the recess is for accommodating the suspension wires, and the recess faces the light emitting position.

10. The electromagnetic driving assembly as claimed in claim 1, wherein the recess is for accommodating the suspension wires, and the recess is formed by the case and the fixed member.

11. The electromagnetic driving assembly as claimed in claim 1, wherein the recess is for accommodating the suspension wires, and the recess is formed between the sidewall and the fixed member.

12. The electromagnetic driving assembly as claimed in claim 1, further comprising an optical sensor disposed on a circuit board, wherein the fixed member is disposed between the movable member and the circuit board.

13. An electromagnetic driving assembly, comprising:

a movable member;

a fixed member spaced apart from the movable member, wherein the movable member and the fixed member are arranged along a main axis;

a case having a top surface and a sidewall, wherein the sidewall extends from a side of the top surface along the main axis, the fixed member and the case form an accommodating space, the movable member is disposed in the accommodating space, and the fixed member is closer to a light emitting position relative to the case;

a plurality of suspension wires elastically connecting the movable member and the fixed member;

an electromagnetic component for driving the movable member to move relative to the fixed member, and the electromagnetic component comprises a driving coil with a coil axis on a virtual plain perpendicular to the main axis;

a conductive layer formed in the fixed member and electrically connected to the electromagnetic component through the suspension wires; and

a terminal exposed by and partially embedded in the fixed member, and electrically connected to the conductive layer, wherein one end of each of the suspension wires is positioned in a recess of the fixed member.

14. The electromagnetic driving assembly as claimed in claim 13, wherein the electromagnetic component further comprises a driving magnet, and the conductive layer is not overlapped with the driving magnet when viewed along the main axis.

15. The electromagnetic driving assembly as claimed in claim 13, wherein the electromagnetic component further comprises a driving magnet aligned with the driving coil along the main axis, and the conductive layer is partially overlapped with the driving magnet when viewed along the main axis.

16. The electromagnetic driving assembly as claimed in claim 13, wherein the driving coil is disposed between the movable member and the conductive layer.

17. The electromagnetic driving assembly as claimed in claim 13, wherein the terminal has a surface exposed from the fixed member, the recess has a surface for the suspension wires to be disposed thereon, and the two surfaces face toward a same direction.

18. The electromagnetic driving assembly as claimed in claim 13, wherein the electromagnetic component further comprises a driving magnet disposed on a frame of the movable member, the frame is disposed between the main axis and the sidewall, and the suspension wires are disposed between the frame and the sidewall.

19. An electromagnetic driving assembly, comprising:

a movable member;

a fixed member having a first recess surface and spaced apart from the movable member, wherein the movable member and the fixed member are arranged along a main axis;

a case having a top surface and a sidewall, wherein the sidewall extends from a side of the top surface along the main axis and comprises a second recess surface, the fixed member and the case form an accommodating space, the movable member is disposed in the accommodating space, and the fixed member is closer to a light emitting position relative to the case;

a plurality of suspension wires elastically connecting the movable member and the fixed member;

an electromagnetic component for driving the movable member to move relative to the fixed member;

a conductive layer formed in the fixed member and electrically connected to the electromagnetic component through the suspension wires; and

a terminal exposed by and partially embedded in the fixed member, and electrically connected to the conductive layer, wherein one end of each of the suspension wires is positioned in a recess of the fixed member, and the recess is surrounded by the first recess surface and the second recess surface.

20. The electromagnetic driving assembly as claimed in claim 19, wherein the first recess surface and the second recess surface are parallel to the main axis.