A 360-degree blind-angle-free position detection magnetic sensor comprising a hollow plastic box, wherein a hollow reed is transversely disposed in the plastic box, and damping springs are respectively disposed at the two ends of the hollow reed; the outer ends of the two damping springs are respectively fixedly connected with the inner walls of the two ends of the plastic box; the hollow reed is movably suspended in an inner chamber of the plastic box, and a conductive magnetic ring is sleeved on the hollow reed; a conductive column is disposed in the plastic box; the inner end of the conductive column penetrates into the hollow reed, and is matched with the hollow reed; lead wires that are electrically connected with the conductive column and the hollow reed are disposed on the plastic box.

A rotation operation device includes: a rotation operation section having a cylindrical shape; multiple recessed and projecting sections arranged on an axial end surface or a peripheral surface of the rotation operation section; a conductive section having a protruding section protruding toward each recessed and projecting section and an elastic section biasing the protruding section to each recessed and projecting section, and movable in a recess-and-projection direction when the rotation operation section rotates; an electrode section changing a capacitance in accordance with a movement of the conductive section; and a detecting section detecting the change in the capacitance. The conductive section is moved in turn in the recess-and-projection direction at a different timing. The detecting section detects a rotation direction and a rotation quantity of the rotation operation section by means of a combination pattern of the change in the capacitance.

A device for controlling reverse gears, particularly of marine engines, includes a fixed part and a movable part, the movable part being adapted to be rotatably coupled to a control member having at least three operating states corresponding to a first, a second and a third angular position of the movable part of the device. The fixed part includes at least one first and one second sensor, for example of the type generating a voltage when subjected to an external magnetic field due to Hall effect, which are arranged at predetermined distance and configured to detect the presence of a magnetic field. The movable part comprises a magnet with such characteristics to generate a magnetic field detected by the first or second sensors when the movable part is in the first or second positions respectively or vice versa, the third position corresponding to a situation of absence of magnetic field detectable by the sensors.

An absolute capacitative encoder includes a PCB, a plurality of conductive sectors that generate capacitors, a rotor mounted in revolving and/or axially translating mode with respect to the PCB, the rotor being made of dielectric material and having a peripheral slot in register with the conductive sectors, a control unit electrically connected to the conductive sectors in such manner to detect the capacity of each capacitor generated by the conductive sectors, the control unit being set in such manner to detect the capacity variation between the capacitors during the rotation and/or axial translation of the rotor in order to detect the angular and/or axial position of the rotor.

An input device includes a knob, a detector, an electromagnetic brake, an elastic member, and a controller. The detector detects a rotation angle of the knob. The electromagnetic brake regulates rotation of the knob. The elastic member is provided between the knob and the electromagnetic brake. When the current position of the knob in the circumferential direction is not the target position for rotation regulation of the knob, the controller does not activate the electromagnetic brake. When the current position of the knob in the circumferential direction is the target position for rotation regulation of the knob, the controller determines whether to regulate rotation of the knob based on a rotation direction of the knob, or on a rotation angle of the knob that shifts from the holding position of the knob in the circumferential direction due to deformation of the elastic member.

A capacitive sensor to determine instantaneous angular position of a rotatable element in a timepiece, such as a setting stem of a wristwatch. Static electrodes are configured to form, in conjunction with rotor electrodes of the rotatable element, a first differential capacitance pair and a second differential capacitance pair. A sensor calculation unit is configured to sense difference values from the differential capacitances pairs and to evaluate the angular position of the rotatable element from the difference values using predetermined information relating the differential capacitance values to angular position values.

A no-contact switch is provided that is configured to change the state of a power converter in a photovoltaic system. The no-contact switch has a mechanical section that is movable from a first position to a second position and which may include a rotary dial or a sliding tab. The mechanical section may be mounted to and penetrate an enclosure. Each of the first and second positions may please a different area of the tab or dial in proximity to a sensor. The sensor may be placed in an interior of the enclosure, and may be configured to sense the change of position of the mechanical section. A controller may be configured to read the signal that the sensor outputs and, according to the signal, determine an electrical state of the power converter and/or change the state.

A manual control for an electronic apparatus includes a manually activated rocker actuator mechanism coupled to a magnet source. The magnet source is in a rest position relative to a Variable Hall effect sensor device when the rocker actuator mechanism is in a rest position. A variable output signal from the sensor device is substantially at a minimum value when the magnet source is in the rest position relative to the sensor device. The magnet source is in a maximum position relative to the sensor device when the rocker actuator mechanism is in a maximum position. The variable output signal is substantially at a maximum value when the magnet source is in the maximum position relative to the sensor device.

An electromagnetic encoding switch and a method for calculating rotation information of a runner. The electromagnetic encoding switch (10) comprises: a runner assembly (11), wherein the runner assembly (11) comprises an LC resonant circuit (111), the LC resonant circuit (111) comprising an inductor L and a capacitor C connected to the inductor L, the inductor L having a magnetic core, and the inductor L being used for receiving and transmitting electromagnetic waves; a runner (112), the LC resonant circuit (111) being disposed on the runner (112); a transceiver unit (12), the transceiver unit (12) comprising an antenna (121) disposed below the runner (112) and used for transmitting electromagnetic waves at a preset frequency in a transmitting period, so that the LC resonant circuit (111) receives energy in the transmitting period; and an antenna selection switch (122) connected to the antenna (121). The electromagnetic encoding switch (10) has no mechanical noise and is low-cost.

The present disclosure aims to provide a high-durability switch device. The switch device includes: a switch key top and a switch key bottom that are freely displaceable relative to each other, the switch key top including key top reception and transmitting coils that are connected to each other, and the switch key bottom including: a key bottom transmitting coil having a relative positional relationship with the key top receiving coil that changes according to a relative displacement operation with respect to the switch key top; a key bottom receiving coil having a relative positional relationship with the key top transmitting coil that changes according to the relative displacement operation with respect to the switch key top; a current supplier supplying current to the key bottom transmitting coil; and a determiner determining relative displacement with respect to the switch key top from induced current in the key bottom receiving coil.