Patent ID: 11871202
Assignee: GOOGLE LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 17:
18. A mobile device, comprising:
a housing;
a panel audio loudspeaker comprising:
an actuator module comprising:
a base plate extending in a plane;
a voice coil connected to the base plate, the voice coil defining a coil axis perpendicular to the plane;
a magnet assembly comprising:
a back side facing the base plate and a front side facing away from the base plate,
a base layer and sidewalls defining a cup,
an inner element comprising a center magnet mounted within the cup, and
a back plate extending parallel to the plane,
wherein the sidewalls comprise a first pair of sidewalls on opposing sides of the cup and a second pair of sidewalls on opposing sides of the cup and adjacent to the first pair of sidewalls, the sidewalls and inner element being separated by an air gap;

a rigid frame attached to the base plate, the rigid frame comprising four stubs each facing a corresponding one of the sidewalls, and
a plurality of springs suspending the magnet assembly relative to the frame and base plate so that the voice coil extends into the air gap,
the plurality of springs comprising a first spring attached to the frame at a first pair of the four stubs respectively facing the first pair of sidewalls and attached to the magnet assembly at the second pair of sidewalls on the front side of the magnet assembly,
the plurality of springs comprising a second spring attached to the frame at a second pair of the four stubs respectively facing the second pair of sidewalls and attached to the magnet assembly at the first pair of sidewalls on the back side of the magnet assembly, and

a panel attached to the base plate of the actuator module; and

an electronic control module electrically coupled to the voice coil and programmed to energize the voice coil to couple vibrations to the panel to produce an audio response from the panel.