Abstract: The present disclosure is directed to providing an optical device, such as a pair of smart glasses. A temple arm of a pair of smart glasses includes a battery disposed within a cavity of the temple arm. The temple arm further includes a cover that encloses the battery located within the cavity of the temple arm. Moreover, the temple arm includes a seal that at least partially secures the cover to the temple arm and is configured to prevent moisture and debris ingress into the cavity. Furthermore, the seal includes an adhesive section that couples the cover and the temple arm and a reusable gasket section removably coupled to the cover and the temple arm. The reusable gasket section is configured to facilitate removal of the cover from the temple arm for replacing the battery.

Abstract: An autonomous mobile device may use a pair of main wheels and a caster assembly to provide mobility. The main wheels are driven by motors, providing steering and movement. Each main wheel may include a cover that conceals and protects a hub of the main wheel from the external environment. The covers may be held in place by elastomeric posts, allowing easy changeout. The caster assembly has a minimal overall height and a field replaceable caster wheel. The caster wheel may include a target that is detectable by a non-contact sensor to detect caster wheel rotation. The caster wheel may comprise an axle, caster wheel hub, and a pair of caster wheel endcaps on each end of the axle. A set of features on the caster wheel hub and each of the caster wheel endcaps provide a labyrinthian path that prevents debris from fouling around the axle.