Abstract: A sensor includes a housing and an antenna element. The first wall and the second wall of the housing are facing each other at a distance from each other. The third wall and the fourth wall connect the first wall and the second wall and are facing at a distance from each other and have a larger area than the first wall and the second wall respectively. The housing has an internal space surrounded by the first wall, the second wall, the third wall, and the fourth wall. The antenna element is arranged in the internal space of the housing and receives identification information of an external actuator for detecting opening/closing of a door. The antenna element is arranged at a position, which is closer to the first wall than the second wall and includes a substantially center in a direction connecting the third wall and the fourth wall.

Abstract: The disclosure provides a door switch that improves visibility. The door switch includes an actuator and a sensor. In addition, the door switch is installed so that when a door is closed, a surface of the sensor and an opposite surface of the actuator are in contact with or close to each other, and when the door is open, the surface of the sensor and the opposite surface of the actuator are separated from each other. The actuator outputs a detection signal. A display part for indicating a reception state of the detection signal is formed on the surface of the sensor. The surface of the sensor has a non-opposite region, wherein the non-opposite region is at least a part of the display part not opposite to the opposite surface of the actuator in the reception state.

Abstract: The door switch (1) includes an actuator (20) and a sensor (10). When a door is closed, a front surface (S1) of the sensor (10) and an opposite surface of the actuator (20) are in contact with each other, and separated when the door is open. The sensor (10) includes a light source part (150) for emitting detection light according to a reception state of a detection signal outputted from the actuator, a collector (122) for collecting the detection light, a diffuse light guide part (123) formed to be connected to the collector and for diffusing and emitting the detection light collected by the collector, and a back surface display part (121) formed on a back surface (B1) side of the sensor to be in contact with the diffuse light guide part and having a main surface (125) for emitting the detection light emitted from the diffuse light guide part.

Abstract: The door switch (1) includes an actuator (20) and a sensor (10). When a door is closed, a front surface (S1) of the sensor (10) and an opposite surface of the actuator (20) are in contact with each other, and separated when the door is open. The sensor (10) includes a light source part (150) for emitting detection light according to a reception state of a detection signal outputted from the actuator, a collector (122) for collecting the detection light, a diffuse light guide part (123) formed to be connected to the collector and for diffusing and emitting the detection light collected by the collector, and a back surface display part (121) formed on a back surface (B1) side of the sensor to be in contact with the diffuse light guide part and having a main surface (125) for emitting the detection light emitted from the diffuse light guide part.

Abstract: A sensor includes a housing and an antenna element. The first wall and the second wall of the housing are facing each other at a distance from each other. The third wall and the fourth wall connect the first wall and the second wall and are facing at a distance from each other and have a larger area than the first wall and the second wall respectively. The housing has an internal space surrounded by the first wall, the second wall, the third wall, and the fourth wall. The antenna element is arranged in the internal space of the housing and receives identification information of an external actuator for detecting opening/closing of a door. The antenna element is arranged at a position, which is closer to the first wall than the second wall and includes a substantially center in a direction connecting the third wall and the fourth wall.

Abstract: The disclosure provides a door switch that improves visibility. The door switch includes an actuator and a sensor. In addition, the door switch is installed so that when a door is closed, a surface of the sensor and an opposite surface of the actuator are in contact with or close to each other, and when the door is open, the surface of the sensor and the opposite surface of the actuator are separated from each other. The actuator outputs a detection signal. A display part for indicating a reception state of the detection signal is formed on the surface of the sensor. The surface of the sensor has a non-opposite region, wherein the non-opposite region is at least a part of the display part not opposite to the opposite surface of the actuator in the reception state.

Abstract: The door switch (1) includes an actuator (20) and a sensor (10). When a door is closed, a front surface (S1) of the sensor (10) and an opposite surface of the actuator (20) are in contact with each other, and separated when the door is open. The sensor (10) includes a light source part (150) for emitting detection light according to a reception state of a detection signal outputted from the actuator, a collector (122) for collecting the detection light, a diffuse light guide part (123) formed to be connected to the collector and for diffusing and emitting the detection light collected by the collector, and a back surface display part (121) formed on a back surface (B1) side of the sensor to be in contact with the diffuse light guide part and having a main surface (125) for emitting the detection light emitted from the diffuse light guide part.

Abstract: The reliability of testing a normally closed contact in a relay unit may involve the following. While the load is de-energized, sending a test signal to a normally closed contact (b1, b2) and detecting the state of the returning test signal sent. Resending a test signal when a detection result does not satisfy a predetermined criteria, and re-detecting the state of the returning test signal resent. The state of the returning test signal resent may be assessed as normal when the re-detection result satisfies the predetermined criteria.

Abstract: A socket includes a socket body having a mounting part, and a holding lever supported on the mounting part to hold a relay mounted at a mounting position of the mounting part. The holding lever includes a support, and a stopper provided on the support and movable between a restriction position at which movement of the relay, positioned at the mounting position, in a removing direction is restricted and a restriction release position at which the restriction of the movement of the relay in the removing direction is released. The holding lever is supported on the mounting part to be movable between a retreat position at which a relay can be mounted and removed and a holding position at which a relay positioned at the mounting position can be held when the stopper is positioned at the restriction position such that the stopper covers a center-of-gravity position of the relay.

Abstract: The reliability of testing a normally closed contact in a relay unit may involve the following. While the load is de-energized, sending a test signal to a normally closed contact (b1, b2) and detecting the state of the returning test signal sent. Resending a test signal when a detection result does not satisfy a predetermined criteria, and re-detecting the state of the returning test signal resent. The state of the returning test signal resent may be assessed as normal when the re-detection result satisfies the predetermined criteria.

Abstract: A socket includes a socket body having a mounting part, and a holding lever supported on the mounting part to hold a relay mounted at a mounting position of the mounting part. The holding lever includes a support, and a stopper provided on the support and movable between a restriction position at which movement of the relay, positioned at the mounting position, in a removing direction is restricted and a restriction release position at which the restriction of the movement of the relay in the removing direction is released. The holding lever is supported on the mounting part to be movable between a retreat position at which a relay can be mounted and removed and a holding position at which a relay positioned at the mounting position can be held when the stopper is positioned at the restriction position such that the stopper covers a center-of-gravity position of the relay.

Abstract: The reliability of testing a normally closed contact in a relay unit may involve the following. While the load is de-energized, sending a test signal to a normally closed contact (b1, b2) and detecting the state of the returning test signal sent. Resending a test signal when a detection result does not satisfy a predetermined criteria, and re-detecting the state of the returning test signal resent. The state of the returning test signal resent may be assessed as normal when the re-detection result satisfies the predetermined criteria.