To prevent incoincidence of contacts, a safety switch switches the contacts by cooperation of an actuator and a switch body. The switch body includes an operating cam and a locking cam that rotate due to insertion of the actuator, an operating rod that switches the contact according to rotation of the operating cam, and a locking lever that is movable toward and away from the locking cam such that the locking lever takes a lock position in which it locks rotation of the locking cam and an unlock position in which it unlocks rotation of the locking cam. The locking lever includes a bulge protruding toward the locking cam. A cam contact surface of the locking lever contacts the locking cam when the actuator moves in a drawing-out direction in an intermediate position between the lock position and the unlock position.

An apparatus for preventing over-discharging according to various embodiments of the present invention may comprise: a housing including a first opening; a first electronic component disposed inside the housing; a second electronic component electrically connected to the first electronic component; and a switch for electrically connecting or disconnecting the first electronic component and the second electronic component through an external force by a pin inserted through the first opening. In addition, various embodiments may be possible.

An apparatus for preventing over-discharging according to various embodiments of the present invention may comprise: a housing including a first opening; a first electronic component disposed inside the housing; a second electronic component electrically connected to the first electronic component; and a switch for electrically connecting or disconnecting the first electronic component and the second electronic component through an external force by a pin inserted through the first opening. In addition, various embodiments may be possible.

A plunger is movable between a first position and a second position. The plunger separates a first movable contact from a first fixed contact and separates a second movable contact from a second fixed contact at the first position. The plunger presses a first movable piece toward a first fixed terminal to make the first movable contact into contact with the first fixed contact, and presses a second movable piece toward a second fixed terminal to make the second movable contact into contact with the second fixed contact at the second position. The plunger moves from the first position to the second position by being pressed by a pressing portion of an electric plug inserted into a third insertion port.

A connector includes a male, key-like member that is operably received in a female connector body. The key-like member includes a stem for operative association with a cord or other body and a distal element. The female connector has a body defining a proximal portion for operative association with a cord or other body and a slot extending along a surface of the body to an aperture for receiving a distal element of a first connector element. A first inside channel extends from the slot at a distal end of the connector to a depth from the surface of the slot. A second inside channel extends from the aperture to the first channel. One of the first and second connectors is provided with a sensor. The sensor indicates that the first connector element is located at the distal portion of the inside channel.

A connector includes a male, key-like member that is operably received in a female connector body. The key-like member includes a stem for operative association with a cord or other body and a distal element. The female connector has a body defining a proximal portion for operative association with a cord or other body and a slot extending along a surface of the body to an aperture for receiving a distal element of a first connector element. A first inside channel extends from the slot at a distal end of the connector to a depth from the surface of the slot. A second inside channel extends from the aperture to the first channel. One of the first and second connectors is provided with a sensor. The sensor indicates that the first connector element is located at the distal portion of the inside channel.

A safety switch device configured to perform at least one of connecting a load to a power supply and disconnecting the load from the power supply is provided. The safety switch device comprises a first set of two serially connected controllable switching elements; a safety circuit to verify a switching state of the first set of two switching elements, wherein each switching element of the first set of two switching elements is configured as a toggle; a control circuit configured to provide a test signal to the safety circuit; and decoupling means configured to galvanically decouple the load circuit from the control circuit. The decoupling means comprise a transformer, and the control circuit comprises a transformer driver configured to provide the test signal to the safety circuit via the transformer.

A safety switch comprises a switching device (2) having a casing (4) housing switching means (5) connected to one or more circuits, an operating device (3) interacting with the switching means (5) for opening/closing the circuits, an unlocking mechanism (13) having an unlocking pin (14) translating with a maximum stroke from a locking position of the access to an unlocking position to operate the opening of the switching means (5), detection means (17) of the stroke of the unlocking pin (14) having a first detector (18) of the start of the stroke of the unlocking pin (14), an auxiliary unlocking control (25, 26) operatively connected to the unlocking mechanism (13) from a rest position to an operative position of unlocking of the access and promote the translation of the unlocking pin (14) The detection means (17) comprise an auxiliary detector (31) for detecting the actuation of the auxiliary unlocking control (25, 26).

A cam of a safety switch rotates about a rotational shaft in accordance with an operation of inserting an actuator into an opening and an operation of withdrawing the actuator. A switch part includes an operation rod that reciprocates according to a rotation angle of the cam, and detects an insertion state where the actuator is inserted in the opening. In the insertion state, a locking member locks the actuator upon engagement with a part of the cam. When the operation of withdrawing the actuator is performed in a locked state of the actuator, the cam pushes the locking member in one direction, and the locking member pushes a part of a head case in the one direction. This improves locking strength of the safety switch.

A cam of a safety switch rotates about a rotational shaft in accordance with an operation of inserting an actuator into an opening and an operation of withdrawing the actuator. A switch part includes an operation rod that reciprocates according to a rotation angle of the cam, and detects an insertion state where the actuator is inserted in the opening. In the insertion state, a locking member locks the actuator upon engagement with a part of the cam. When the operation of withdrawing the actuator is performed in a locked state of the actuator, the cam pushes the locking member in one direction, and the locking member pushes a part of a head case in the one direction. This improves locking strength of the safety switch.