Vibrating actuator

1. A vibrating actuator, comprising:

a magnet arrangement including at least one magnet;

a hollow member comprising at least one coil member with a coil transversally surrounding a cavity forming a longitudinal passageway for receiving the magnet arrangement and permitting a longitudinal relative movement between the hollow member and the magnet arrangement; and

elastic elements interconnecting the magnet arrangement and the hollow member, wherein:

the elastic elements consist of two elastic elements which are thin membranes having an oblong shape with transversal indentations on their opposite long sides;

each of the magnet arrangement and the hollow member has a corresponding first longitudinal end and a corresponding second longitudinal end;

the magnet arrangement has (i) a first longitudinal extension on the corresponding first longitudinal end at a first corner of the magnet arrangement and (ii) a second longitudinal extension on the corresponding second longitudinal end at a second corner of the magnet arrangement, wherein the second longitudinal extension is diagonal from the first longitudinal extension;

the hollow member has (i) a first corner on the corresponding first longitudinal end transversally opposite the first longitudinal extension of the magnet arrangement and (ii) a second corner on the corresponding second longitudinal end transversally opposite the second longitudinal extension of the magnet arrangement;

a first of the two elastic elements is connected between the first longitudinal extension of the magnet arrangement and the first corner of the hollow member; and

a second of the two elastic elements is connected between the second longitudinal extension of the magnet arrangement and the second corner of the hollow member.

2. The vibrating actuator of claim 1 , wherein each elastic element is flat and the indentations have a concave or polygonal shape.

3. The vibrating actuator of claim 1 , wherein the elastic elements are made of copper beryllium.

4. The vibrating actuator of claim 1 , wherein the magnet arrangement comprises two magnets arranged with same polarities facing each other and wherein the hollow member comprises one coil member.

5. The vibrating actuator of claim 1 , wherein the magnet arrangement comprises three magnets arranged with same polarities facing each other and wherein the hollow member comprises two coil members and a spacer.

6. The vibrating actuator of claim 5 , wherein coil membrane interfaces are provided at the longitudinal outer ends of the coil members.

7. The vibrating actuator of claim 1 , wherein the magnet arrangement further comprises a magnet frame at least partially enclosing the at least one magnet.

8. The vibrating actuator of claim 1 , wherein the hollow member is fixed to a chassis and stationary and the magnet arrangement performs a linear longitudinal vibratory movement.

9. The vibrating actuator of claim 1 , wherein the magnet arrangement is fixed to a chassis and stationary and the hollow member performs a linear longitudinal vibratory movement.

10. The vibrating actuator of claim 1 , wherein the magnet arrangement and the hollow member are flat and rectangular.

11. The vibrating actuator of claim 1 , wherein the magnet frame and the hollow member are attached using screws.

12. The vibrating actuator of claim 1 , wherein the elastic elements have a bone-like structure.

13. The vibrating actuator of claim 1 , wherein the magnet arrangement comprises a magnet frame made of a rigid material.

14. The vibrating actuator of claim 13 , wherein the frequency response of the vibrating actuator can be adjusted by choice of the rigid material.

15. The vibrating actuator of claim 1 having a cylindrical shape.

16. The vibrating actuator of claim 1 , wherein the hollow member comprises two coils having a spacer in between them.

17. The vibrating actuator of claim 1 , wherein the magnets in the magnet arrangement are glued together inside the magnet frame with same polarities of the magnets facing each other.

18. The vibrating actuator of claim 1 , wherein the hollow member comprises at least two coils, a spacer, and at least two coil membrane interfaces.

19. The vibrating actuator of claim 18 , wherein the hollow member is formed by placing at least two coils with a cavity inside to fit the space and providing an interface member on each of the at least two coils.

20. The vibrating actuator of claim 1 , wherein:

the longitudinal passageway of the hollow member has open ends for receiving the magnet arrangement and permitting the longitudinal relative movement between the hollow member and the magnet arrangement; and

the elastic means are fixed to the open ends of the hollow member.

21. The vibrating actuator of claim 20 , wherein:

each elastic element has only a single pair of transversal indentations on its opposite long sides; and

each elastic element has a central portion without any opening.

22. The vibrating actuator of claim 1 , wherein each elastic element has only a single pair of transversal indentations on its opposite long sides.

23. The vibrating actuator of claim 22 , wherein each elastic element has a central portion without any opening.

24. The vibrating actuator of claim 23 , wherein:

the longitudinal passageway of the hollow member has open ends for receiving the magnet arrangement and permitting the longitudinal relative movement between the hollow member and the magnet arrangement;

the elastic means are fixed to the open ends of the hollow member;

each elastic element has only a single pair of transversal indentations on its opposite long sides; and

each elastic element has a central portion without any opening.

25. The vibrating actuator of claim 7 , wherein the first and second longitudinal extensions are located at diagonally opposing first and second corners of the magnet frame.