A switch apparatus, includes: a base module including a base case, and a moving magnet movably mounted in the base case; and a manipulation module including a manipulation case, and a first magnet fixedly mounted in the manipulation case, wherein the moving magnet moves between a hold position and a releasable position, the hold position refers to a position in which the manipulation module is held onto the base module as an attractive force acts between the moving magnet and the first magnet, and the releasable position refers to a position in which the manipulation module is releasable from the base module as a repulsive force acts between the moving magnet and the first magnet.

A pushbutton assembly comprises a base, a pushbutton which is displaceable in a push direction relative to the base from an unactuated rest position into an actuated position and vice versa, and a return device which biases the pushbutton towards the rest position. Further, a self-centering device is provided which comprises a button part and a base part, the button part and the base part of the self-centering device cooperating in the rest position of the pushbutton so as to position the pushbutton in a centered position with respect to the base.

A switch apparatus, includes: a base module including a base case, and a moving magnet movably mounted in the base case; and a manipulation module including a manipulation case, and a first magnet fixedly mounted in the manipulation case, wherein the moving magnet moves between a hold position and a releasable position, the hold position refers to a position in which the manipulation module is held onto the base module as an attractive force acts between the moving magnet and the first magnet, and the releasable position refers to a position in which the manipulation module is releasable from the base module as a repulsive force acts between the moving magnet and the first magnet.

A contactor system includes a contactor actuator that causes an input bus bar to be electrically connected to an output bus bar and an actuator control element that controls operation of the contactor actuator. The actuator controller includes an input and an output. The system also includes a connection that includes two inputs configured to receive signals from two or more controllers and provide one control signal to the input of the actuator control element and a relay coupled between the output of the actuator control element and ground that disrupts the signal from passing through the actuator control element when commanded by any of the one or more controllers.

A line control device of an earphone includes an upper cover; a middle cover being detachably and fixedly connected to the upper cover, wherein, an arranging space for arranging a control panel is enclosed between the upper cover and the middle cover; and a lower cover being fixedly connected to the middle cover, wherein, shielding parts are formed on the edges at both sides of the middle cover, and the shielding parts are used for sealing the gaps between the upper cover and the lower cover.

An operating device includes a knob, which is formed into a rod form, and a resilient body, which is formed into a ring form. Position limiting parts, which limit a position of the resilient body, include at least one primary rib, which is placed on one side of the resilient body in a longitudinal direction of the knob, and at least one secondary rib, which is placed on another side of the resilient body in the longitudinal direction of the knob. The at least one primary rib and the at least one secondary rib radially outwardly project from the outer peripheral portion of the knob within an extent that does not extend beyond the resilient body.

A line control device of an earphone, comprising: an upper cover; a middle cover being detachably and fixedly connected to the upper cover, wherein, an arranging space for arranging a control panel is enclosed between the upper cover and the middle cover; and a lower cover being fixedly connected to the middle cover, wherein, shielding parts are formed on the edges at both sides of the middle cover, and the shielding parts are used for sealing the gaps between the upper cover and the lower cover. The present invention can achieve multi-function control by using the above structure, meanwhile, it is convenient to disassemble and replace damaged parts and components in a simple snap-fitting manner, so that the costs are low, besides, perspirations and dusts can be prevented from entering the line control assembly, so that it is avoided that the function is influenced because the control panel is corroded.

A contactor system includes a contactor actuator that causes an input bus bar to be electrically connected to an output bus bar and an actuator control element that controls operation of the contactor actuator. The actuator controller includes an input and an output. The system also includes a connection that includes two inputs configured to receive signals from two or more controllers and provide one control signal to the input of the actuator control element and a relay coupled between the output of the actuator control element and ground that disrupts the signal from passing through the actuator control element when commanded by any of the one or more controllers.