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.

An air compressor includes a cylinder and a piston reciprocably movable inside the cylinder, an electric motor configured to drive the pump, and a pressure switch, including a push-button for activating and deactivating the pressure switch, movable between first and second operating positions. A housing covers the pump electric motor and pressure switch. A switch, coupled to the housing and movable between first and second operating positions is configured to move the push-button such that when the switch is in the first operating position, the push-button is in the respective first position and, when the switch is in the second operating position, the push-button is free to switch between the first and the second position.

Embodiments of the present disclosure provide a display device. The display device includes: a display panel; a control circuit board; and a rotary knob assembly connected to the control circuit board. The rotary knob assembly includes a rotary rod and a rotary knob cap, the rotary rod is connected to the rotary knob cap, and the rotary knob cap is configured to drive the rotary rod to rotate. The display panel is connected to the control circuit board, the rotary knob assembly is configured for generating a signal according to an action of the rotary knob cap and transmitting the signal to the control circuit board, and the control circuit board is configured for controlling the display panel to display according to the signal.

Embodiments of the present disclosure provide a display device. The display device includes: a display panel; a control circuit board; and a rotary knob assembly connected to the control circuit board. The rotary knob assembly includes a rotary rod and a rotary knob cap, the rotary rod is connected to the rotary knob cap, and the rotary knob cap is configured to drive the rotary rod to rotate. The display panel is connected to the control circuit board, the rotary knob assembly is configured for generating a signal according to an action of the rotary knob cap and transmitting the signal to the control circuit board, and the control circuit board is configured for controlling the display panel to display according to the signal.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.

A switch in accordance with one aspect of the disclosure may include a housing connected to a first contact and configured to be rotatable, an electrode provided on an outer surface of the housing and connectable to a second contact outside the housing by rotation of the housing, a coil provided inside the housing and configured to generate a magnetic force, and a spring provided inside the housing and rotating the housing in response to the magnetic force generated by the coil.

A switch in accordance with one aspect of the disclosure may include a housing connected to a first contact and configured to be rotatable, an electrode provided on an outer surface of the housing and connectable to a second contact outside the housing by rotation of the housing, a coil provided inside the housing and configured to generate a magnetic force, and a spring provided inside the housing and rotating the housing in response to the magnetic force generated by the coil.

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.