An actuation assembly for an oral irrigator includes a bezel secured to or formed as part of a housing of the oral irrigator, an actuator operably connected to the bezel and moveable relative thereto, and an augmentation fluid positioned between the bezel and the actuator. The augmentation fluid modifies a frictional relationship between the bezel and the actuator to provide a predefined resistance force between the actuator and the bezel as the actuator is rotated relative to the bezel.

A knob assembly includes a first housing with a sidewall extending from a base and a retention member inwardly extends from the sidewall. An operable second housing includes a selective stopper selectively movable between a first position and a second position relative to the retention member. The operable second housing is further axially operable between a compressed position and an extended position relative to the first housing, and the operable second housing includes a biasing member.

A knob assembly includes a first housing with a sidewall extending from a base and a retention member inwardly extends from the sidewall. An operable second housing includes a selective stopper selectively movable between a first position and a second position relative to the retention member. The operable second housing is further axially operable between a compressed position and an extended position relative to the first housing, and the operable second housing includes a biasing member.

A control knob for an appliance includes a base having an axially-operated switch. An outer control assembly is rotationally and axially operable with respect to the base. An inner display assembly is rotationally fixed with respect to the base and axially fixed with respect to the outer control assembly. The inner display assembly is biased toward an extended state and is axially operable to a selection state that engages the axially operated switch.

A control knob for an appliance includes a base having an axially-operated switch. An outer control assembly is rotationally and axially operable with respect to the base. An inner display assembly is rotationally fixed with respect to the base and axially fixed with respect to the outer control assembly. The inner display assembly is biased toward an extended state and is axially operable to a selection state that engages the axially operated switch.

Various arrangements of smart home devices are presented herein. A chassis assembly of a smart home device may define one or more compartments. The chassis assembly may include a plurality of cover fasteners. A rotatable cover assembly may be present and configured to be removably attached with the plurality of cover fasteners to the chassis assembly in any rotational orientation and to at least partially cover a front of the chassis assembly. While the rotatable cover is removably attached with the plurality of cover fasteners, the rotatable cover assembly is configured to block access to the one or more compartments defined by the chassis assembly.

A knob device for vehicle includes a knob unit and a locking unit. The knob unit includes a rotating cover, a rotary shaft and a motor configured to drive the rotating cover to vibrate. The locking unit includes a rotary wheel which includes a main body fixed to the rotary shaft and locking notches formed at a periphery of the main body. The locking notches are sunk from the periphery of the main body toward a center of the main body in radial directions of the main body. The locking unit further includes a locking pole configured to be inserted into one of the locking notches to block rotation of the rotary wheel, and an actuator configured to drive the locking pole to move. The knob device applies a locking unit which is capable of locking the rotary wheel, thereby realizing diverse use requirements.

A knob device for vehicle includes a knob unit and a locking unit. The knob unit includes a rotating cover, a rotary shaft and a motor configured to drive the rotating cover to vibrate. The locking unit includes a rotary wheel which includes a main body fixed to the rotary shaft and locking notches formed at a periphery of the main body. The locking notches are sunk from the periphery of the main body toward a center of the main body in radial directions of the main body. The locking unit further includes a locking pole configured to be inserted into one of the locking notches to block rotation of the rotary wheel, and an actuator configured to drive the locking pole to move. The knob device applies a locking unit which is capable of locking the rotary wheel, thereby realizing diverse use requirements.

A multifunctional switch manipulator is provided. The manipulator includes a first switch unit, which is curved to be convex at the upper surface thereof, a second switch unit, which is disposed at a first side of the first switch unit and which extends radially in a first direction, and a third switch unit, which is disposed at a second side of the first switch unit and which extends radially in a second direction opposite the first direction. Each of the second and third switch units includes a housing that has an opening and a rotary knob disposed at the housing to be rotatable in a direction in which the opening extends, and at least one surface of the rotary knob is exposed to an outside through the opening.

A multifunctional switch manipulator is provided. The manipulator includes a first switch unit, which is curved to be convex at the upper surface thereof, a second switch unit, which is disposed at a first side of the first switch unit and which extends radially in a first direction, and a third switch unit, which is disposed at a second side of the first switch unit and which extends radially in a second direction opposite the first direction. Each of the second and third switch units includes a housing that has an opening and a rotary knob disposed at the housing to be rotatable in a direction in which the opening extends, and at least one surface of the rotary knob is exposed to an outside through the opening.