Vibration actuator for rigid structures for high-performance bass playback in automobiles

1. An actuator for exciting at least one component of a motor vehicle with vibrations, the actuator comprising:

a housing which is configured to be connected to the component;

an electrical coil which is rigidly connected to the housing and is configured to generate a magnetic field when an electrical current flows through the coil; and

a magnet which is arranged in the housing so as to be movable to a limited extent,

wherein the coil has a fixed connection to the housing by an adhesive connection of thermally relatively highly conductive adhesive, wherein said adhesive has a thermal conductivity of at least 0.8 W/(m K).

2. The actuator as claimed in claim 1 ,

wherein the actuator has at least one first pole plate which is assigned to the magnet, wherein the outwardly directed surface of a first pole plate is concave, and therefore said surface has a greater thickness at the outer edge than in its center.

3. The actuator as claimed in claim 1 ,

wherein the first pole plate has a collar along its outer edge, of substantially constant thickness, which can comprise up to 20% of the total extent of the pole plate.

4. The actuator as claimed claim 2 ,

wherein that surface of the first pole plate which is oriented toward the magnet is substantially planar.

5. The actuator as claimed in claim 2 ,

wherein the first and/or a second pole plate are/is configured with regard to their outwardly directed surface in such a way that they have a substantially planar partial surface and/or a plateau in their center.

6. The actuator as claimed in claim 1 ,

wherein the housing of the actuator has a heat capacity of at least 0.08 kJ/K, in particular of at least 0.1 kJ/K.

7. The actuator as claimed in claim 1 ,

wherein the layer thickness of the adhesive is a maximum of 0.3 mm.

8. The actuator as claimed in claim 1 ,

wherein an inner surface of the housing, which is connected to the coil and/or to the coil carrier by an adhesive connection, is structured and/or profiled.

9. The actuator as claimed claim 3 , wherein that surface of the first pole plate which is oriented toward the magnet is substantially planar.

10. The actuator as claimed claim 2 , wherein the first pole plate has a collar along its outer edge, of substantially constant thickness, which can comprise up to 20% of the total extent of the pole plate.

11. The actuator as claimed in claim 1 , wherein the housing of the actuator has a heat capacity of at least 0.1 kJ/K.

12. The actuator as claimed claim 1 , wherein the layer thickness of the adhesive is less than 0.1 mm.

13. An actuator for exciting at least one component of a motor vehicle with vibrations, the actuator comprising:

a housing which is configured to be connected to the component;

an electrical coil which is rigidly connected to the housing and is configured to generate a magnetic field when an electrical current flows through the coil;

a magnet which is arranged in the housing so as to be movable to a limited extent; and

a spring arrangement which is configured to bias the magnet into an inoperative position, wherein the spring arrangement is configured to bias the magnet in a manner returning same back to the inoperative position along every possible direction of movement.

14. The actuator as claimed in claim 13 ,

wherein the spring arrangement has a first spring element and a second spring element,

wherein the magnet is held between the first spring element and the second spring element,

wherein the first spring element biases the magnet in a first direction and the second spring element biases the magnet in a second direction opposite to the first direction, wherein the first spring element has a number of spring arms for biasing the magnet, and/or the second spring element has a number of spring arms for biasing the magnet.

15. The actuator as claimed in claim 14 ,

wherein the spring elements are formed from a composite material.

16. The actuator as claimed in claim 14 ,

wherein the spring elements are coated with one or more plastics with relatively high damping or with relatively massive materials, in order to dampen and/or to detune the natural vibration behavior of the spring elements.

17. The actuator as claimed in claim 14 ,

wherein the arrangement of the spring arms is configured symmetrically or, alternatively, configured asymmetrically, in order to prevent natural vibrations.

18. The actuator as claimed in claim 14 ,

wherein the spring arms are profiled in order to further improve the rigidity and the vibration properties, wherein the profiling is implemented by at least one rib and/or at least one bead and/or at least one edge and/or at least one curvature.