Abstract: An impeller for a viscous flow fan includes a hub having a longitudinal axis, and a plurality of ring-shaped wave blades disposed about and coupled to a perimeter of the hub, the wave blades disposed in a parallel and spaced apart from one another along the longitudinal axis by a blade gap. Each wave blade includes a center coincident with the longitudinal axis, an inner perimeter, an outer perimeter, and a wave-like cross-section about the perimeter of the hub in a direction perpendicular to the longitudinal axis, wherein at least a portion of the inner perimeter of at least one of the wave blades is spaced from the perimeter of the hub to form an air intake gap.

Abstract: In an example, a power plug may include a connector to engage with a power receptacle of an electronic device, and a removable lock ring disposed around the connector. The lock ring may include a lock tab disposed on the lock ring and extending in a direction away from a longitudinal axis of the power plug. The lock tab may insert into a lock notch of the power receptacle.

Abstract: An electronic device includes a body and an image capturing assembly mounted on the body. The image capturing assembly comprising an imaging device and a device control assembly coupled to the imaging device to control a movement of the imaging device along a central axis of the image capturing assembly to allow the imaging device to be positioned at multiple positions along the central axis of the image capturing assembly. The device control assembly includes a first guide member, a second guide member rotatably disposed within the first guide member, and an inner body movably disposed within the second guide member. In response to a rotational motion of the second guide member with respect to the first guide member, the inner body is to move in axial direction with respect to the second guide member to move the imaging device along the central axis of the image capturing assembly.

Abstract: In an example, a power plug may include a connector to engage with a power receptacle of an electronic device, and a removable lock ring disposed around the connector. The lock ring may include a lock tab disposed on the lock ring and extending in a direction away from a longitudinal axis of the power plug. The lock tab may insert into a lock notch of the power receptacle.

Abstract: An electronic device includes a body and an image capturing assembly mounted on the body. The image capturing assembly comprising an imaging device and a device control assembly coupled to the imaging device to control a movement of the imaging device along a central axis of the image capturing assembly to allow the imaging device to be positioned at multiple positions along the central axis of the image capturing assembly. The device control assembly includes a first guide member, a second guide member rotatably disposed within the first guide member, and an inner body movably disposed within the second guide member. In response to a rotational motion of the second guide member with respect to the first guide member, the inner body is to move in axial direction with respect to the second guide member to move the imaging device along the central axis of the image capturing assembly.