Back to results
US 12,312,836 B2Granted
Safety switch, and switch system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKoji Ito, Tomohiro Mori
Life of this patent
Estimating the term…
Abstract
A safety switch includes a detection unit, an output unit, an input unit; and a display unit. The detection unit is configured to detect presence or absence of abnormality. The output unit is configured to output an abnormality detection signal indicating a detection result of the presence or absence of the abnormality. The input unit is configured to input a display control signal. The display unit is configured to perform display based on the display control signal.
Claims13
A safety switch comprising:
- an actuator;
- and
- a sensor main body facing the actuator,
- wherein the sensor main body includes a coil, and the actuator includes an RFID tag,
- wherein the coil and the RFID tag are configured to detect presence or absence of abnormality, and
- the sensor main body is configured to output an abnormality detection signal indicating a detection result of the presence or absence of the abnormality, and to input a display control signal;
- wherein the sensor main body further includes a display unit configured to perform display based on the display control signal, and
- wherein the coil and the RFID tag are configured to detect the presence or absence of the abnormality based on a state in which the sensor main body and the actuator are close to each other, and
- wherein the display control signal includes closing information if all of the coils and the RFID tags of a plurality of safety switches each corresponding to the safety switch detect absence of abnormality in the respective safety switch and includes opening information otherwise.
6 more elements
A switch system comprising:
- a plurality of safety switches,
- wherein each of the plurality of safety switches comprises:
- an actuator;
- and
- a sensor main body facing the actuator,
- wherein the sensor main body is configured to input a display control signal, and
- wherein the sensor main body includes a coil, and the actuator includes an RFID tag,
- wherein the sensor main body further includes a display unit configured to perform display based on the display control signal,
- wherein the sensor main body is configured to output an abnormality detection signal indicating a detection result of the presence or absence of the abnormality,
- wherein the plurality of safety switches are connected in series, the plurality of safety switches comprising a first safety switch disposed at a last stage and a second safety switch disposed at a position other than the last stage,
- wherein the sensor main body of the first safety switch is configured to output the abnormality detection signal via a duplexed signal line,
- wherein the sensor main body of the second safety switch is configured to output the abnormality detection signal via a single signal line,
- wherein the coil and the RFID tag are configured to detect the presence or absence of the abnormality based on a state in which the sensor main body and the actuator are close to each other, and
- the display control signal includes closing information if all of the coils and the RFID tags of the plurality of safety switches detect absence of abnormality in the respective safety switch and includes opening information otherwise.
11 more elements
Dependencies are inferred from the claim text.