US Patent 11935695 Shock protection implemented in a balanced armature receiver

Various embodiments of balanced armature receivers are disclosed, where the receiver includes a yoke which retains permanent magnets, a coil assembly having a coil tunnel, and an armature coupled to the yoke, with a movable portion extending through the coil tunnel and an end portion that is free to deflect between the magnets when an excitation signal is applied to the coil assembly. There are a stationary protrusion which extends from the stationary portion of the receiver toward the movable portion of the armature, and a movable protrusion which extends from the movable portion of the armature toward the stationary portion of the receiver. The stationary and movable protrusions are offset laterally.