Reduced thickness actuator

1. An actuator comprising:

a magnetic cup comprising a base and sidewalls defining a cavity, the base comprising a planar outer surface opposite the cavity, an edge of the outer surface comprising one or more joint elements;

a magnet arranged in the cavity of the magnetic cup and separated from the sidewalls by an air gap;

a voice coil arranged in the air gap separating the sidewalls of the magnetic cup and the magnet;

a support comprising one or more magnetic suspension members each comprising an edge shaped to fit to a corresponding one of the one or more joint elements to connect the support to the magnetic cup, each of the one or more magnetic suspension members having a first side that is a) flush with the planar outer surface of the magnetic cup orb) displaced from the planar outer surface of the base of the magnetic cup along a first axis perpendicular to the planar outer surface in a direction toward the cavity of the magnetic cup; and

a coupling plate attached to the voice coil and the support.

2. The actuator of claim 1 , wherein the magnetic cup has a depth along the first axis of 3.5 millimeters or less.

3. The actuator of claim 1 , wherein each of the joint elements has a depth along the first axis of 200 microns or less.

4. The actuator of claim 3 , wherein each of the joint elements has a dimension orthogonal to the first axis of 200 microns or less.

5. The actuator of claim 1 , wherein the joint elements are rabbets.

6. The actuator of claim 5 , wherein each of the rabbets have a rectangular shape or a square shape.

7. The actuator of claim 1 , wherein each of the joint elements are a chamfered edge, a scalloped edge, or a filleted edge.

8. The actuator of claim 1 , wherein the one or more joint elements comprises a single continuous edge feature along the edge of the planar outer surface of the base of the magnetic cup.

9. The actuator of claim 1 , wherein the one or more joint elements comprise two or more discrete joint elements.

10. The actuator of claim 1 , wherein each of the one or more magnetic suspension members is welded to the magnetic cup at the corresponding joint element.

11. The actuator of claim 1 , wherein each of the one or more magnetic suspension members has a relative permeability between 100 and 20,000.

12. The actuator of claim 1 , wherein each of the one or more magnetic suspension members has a Young's modulus between 100 gigapascals and 250 gigapascals.

13. The actuator of claim 1 , wherein each of the one or more magnetic suspension members is low carbon steel.

14. The actuator of claim 1 , wherein each of the one or more magnetic suspension members is cold rolled steel.

15. The actuator of claim 1 , wherein the support comprises a support sidewall that connects the one or more magnetic suspension members to the coupling plate.

16. The actuator of claim 15 , wherein the support sidewall is a material with magnetic properties.

17. The actuator of claim 16 , wherein the support sidewall is iron.

18. The actuator of claim 1 , wherein the magnet cup is a soft magnetic material.

19. A mobile device comprising:

an electronic display panel extending in a plane;

a chassis attached to the electronic display panel and defining a space between a back panel of the chassis and the electronic display panel;

an electronic control module housed in the space, the electronic control module comprising a processor; and

an actuator housed in the space and attached to a surface of the electronic display panel, the actuator comprising:

a magnetic cup comprising a base and sidewalls defining a cavity, the base comprising a planar outer surface opposite the cavity, an edge of the outer surface comprising one or more joint elements;

a magnet arranged in the cavity of the magnetic cup and separated from the sidewalls by an air gap;

a voice coil arranged in the air gap separating the sidewalls of the magnetic cup and the magnet;

a support comprising one or more magnetic suspension members each comprising an edge shaped to fit to a corresponding one of the one or more joint elements to connect the support to the magnetic cup, each of the one or more magnetic suspension members having a first side that is a) flush with the planar outer surface of the magnetic cup orb) displaced from the planar outer surface of the base of the magnetic cup along a first axis perpendicular to the planar outer surface in a direction toward the cavity of the magnetic cup; and

a coupling plate attached to the voice coil and the support.

20. A wearable device comprising:

an electronic display panel extending in a plane;

a chassis attached to the electronic display panel and defining a space between a back panel of the chassis and the electronic display panel;

an electronic control module housed in the space, the electronic control module comprising a processor; and

an actuator housed in the space and attached to a surface of the electronic display panel, the actuator comprising:

a magnetic cup comprising a base and sidewalls defining a cavity, the base comprising a planar outer surface opposite the cavity, an edge of the outer surface comprising one or more joint elements;

a magnet arranged in the cavity of the magnetic cup and separated from the sidewalls by an air gap;

a voice coil arranged in the air gap separating the sidewalls of the magnetic cup and the magnet;

a support comprising one or more magnetic suspension members each comprising an edge shaped to fit to a corresponding one of the one or more joint elements to connect the support to the magnetic cup, each of the one or more magnetic suspension members having a first side that is a) flush with the planar outer surface of the magnetic cup orb) displaced from the planar outer surface of the base of the magnetic cup along a first axis perpendicular to the planar outer surface in a direction toward the cavity of the magnetic cup; and

a coupling plate attached to the voice coil and the support.