An input device includes: a first electrode; a support body that supports the first electrode; a fixed body fixed above the support body; a second electrode; a movable body that holds the second electrode in a state where the second electrode faces the first electrode with a predetermined space being provided therebetween, and causes the second electrode to approach and recede from the first electrode in a movement direction by rotating; an operation body that is fixed movably relative to the fixed body in a state where the operation body is engaged with the movable body, and causes, by being operated by a user, the movable body to rotate; and a biasing part that is disposed between the movable body and the fixed body, and applies, to the movable body, a biasing force toward the support body.

A switch assembly according to an example of this disclosure includes a disk rotatable about a disk axis in a first circumferential direction and a second circumferential direction opposite the first circumferential direction. A U-shaped spring is fixed to the disk. Rotation of the disk in the first circumferential direction moves the disk in a first axial direction, and rotation of the disk in the second circumferential direction moves the disk in the first axial direction.

An input device includes: a first electrode; a support body that supports the first electrode; a fixed body fixed above the support body; a second electrode; a movable body that holds the second electrode in a state where the second electrode faces the first electrode with a predetermined space being provided therebetween, and causes the second electrode to approach and recede from the first electrode in a movement direction by rotating; an operation body that is fixed movably relative to the fixed body in a state where the operation body is engaged with the movable body, and causes, by being operated by a user, the movable body to rotate; and a biasing part that is disposed between the movable body and the fixed body, and applies, to the movable body, a biasing force toward the support body.

An ultra-low or very low frequency communication device composed of: a circuit unit operative to produce an alternating current; and a dipole antenna connected to receive the alternating current and to convert the alternating current into electromagnetic radiation. The antenna is composed of an unshielded radiating conductor and a shielded return conductor connected in series with the radiating conductor, and the return conductor is shielded by a Faraday shield such as a collisionless plasma column that surrounds the return conductor to prevent any electromagnetic radiation from the return conductor.

An actuating apparatus having a signal transmitter and a mechanical operating element, wherein the mechanical operating element includes a first position that is stable over time and a second position that is stable over time, wherein the mechanical operating element, in the case of a movement from the first position that is stable over time into the second position that is stable over time, actuates the signal transmitter, and wherein the signal transmitter, upon actuation, causes a first signal change followed by a second signal change of an output signal, and an evaluation circuit detects an actuation of the mechanical operating element based on the first signal change and the second signal change.

A hair straightener and its integrated switch for control and display are disclosed. The hair straightener comprises first and second clamping plate parts and the integrated switch for control and display arranged on an inner side of the second clamping plate part. The integrated switch for control and display comprises a temperature control knob assembly for regulating and controlling temperature, a display button assembly for displaying the temperature and turning on or off a power supply, and a control motherboard for digital display and electrical control. The temperature control knob assembly and the display button assembly are installed on the control motherboard. The temperature display, control and regulation functions, and the power supply switching on and off functions are centralized on the same switch key, such that the temperature can be controlled and regulated conveniently when operated by one hand and the visual information can be obtained without obstacles.

A rotary knob for operating an electronically actuable deadbolt is described herein. According to some embodiments, the rotary knob includes a chassis, an outer wall rotatably coupled to the chassis about a central axis of the knob, a cantilevered beam attached to an inner surface of the outer wall and extending towards the central axis of the knob such that the beam is configured to rotate with the outer wall about the central axis, a circuit board coupled to the chassis, the circuit board including signal traces, and an electrical contact extending from the cantilevered beam in a direction toward the signal traces and electrically connectable with the signal traces. A controller of the rotary knob is configured to determine a position of the deadbolt based on at least the state of the electrical connection between the electrical contact and the signal traces.

An electrical appliance device contains a knob which has a knob front assembly with a front cover assembly, a knob bracket, and a display module assembly disposed between the front cover assembly and the knob bracket, and a knob rear assembly including a circuit board and a hollow rotary encoder. The rotary encoder is mounted on the circuit board. The electrical appliance device further has a panel with an opening. The knob front assembly at least partially passes through the opening such as to be mounted to the knob rear assembly.

An ultra-low or very low frequency communication device composed of: a circuit unit operative to produce an alternating current; and a dipole antenna connected to receive the alternating current and to convert the alternating current into electromagnetic radiation. The antenna is composed of an unshielded radiating conductor and a shielded return conductor connected in series with the radiating conductor, and the return conductor is shielded by a Faraday shield such as a collisionless plasma column that surrounds the return conductor to prevent any electromagnetic radiation from the return conductor.

A switch assembly according to an example of this disclosure includes a disk rotatable about a disk axis in a first circumferential direction and a second circumferential direction opposite the first circumferential direction. A U-shaped spring is fixed to the disk. Rotation of the disk in the first circumferential direction moves the disk in a first axial direction, and rotation of the disk in the second circumferential direction moves the disk in the first axial direction.