A switchgear having bus transfer current switching capability by turn and twist mechanism includes a contact system for electrical current conduction and bus transfer switching. The contact system has fixed and movable contact assemblies. Each contact assembly comprises includes main and arcing contacts. The arcing contacts are for bus transfer switching. The movable contact assembly comprises includes a current path pipe and an end piece. The current path pipe is a cylindrical pipe, and the end piece is a rectangular block. The movable contact assembly includes a movable main contact provided on the rectangular block, and a movable arcing contact provided at the end of the cylindrical pipe on a portion about the periphery. During engagement, the cylindrical pipe turns about a first axis to bring the contact assemblies proximal to each other, and twists about a second axis for engagement of the main contacts.

A switchgear having bus transfer current switching capability by turn and twist mechanism includes a contact system for electrical current conduction and bus transfer switching. The contact system has fixed and movable contact assemblies. Each contact assembly comprises includes main and arcing contacts. The arcing contacts are for bus transfer switching. The movable contact assembly comprises includes a current path pipe and an end piece. The current path pipe is a cylindrical pipe, and the end piece is a rectangular block. The movable contact assembly includes a movable main contact provided on the rectangular block, and a movable arcing contact provided at the end of the cylindrical pipe on a portion about the periphery. During engagement, the cylindrical pipe turns about a first axis to bring the contact assemblies proximal to each other, and twists about a second axis for engagement of the main contacts.

The invention discloses an armature circuit in an electric tool and a power socket of the electric tool using the armature circuit, comprising a power supply and a motor. Two electrodes of the power supply are each provided with a connection structure connected to an output part. One connection structure is a multi-contact on/off controllable movable contact structure, and the other one is a double-faced multi-contact structure. According to the armature circuit, the internal resistance of the armature circuit of the motor is greatly reduced, the hardness of running characteristics of the motor is enhanced, and the working efficiency of the tool is improved; due to decreasing of the internal resistance, the current loss of the armature circuit is reduced, and the temperature rise of an electric appliance and contacts is reduced; with the same working efficiency, the battery capacity can be saved, and the battery cost is reduced.

The invention discloses an armature circuit in an electric tool and a power socket of the electric tool using the armature circuit, comprising a power supply and a motor. Two electrodes of the power supply are each provided with a connection structure connected to an output part. One connection structure is a multi-contact on/off controllable movable contact structure, and the other one is a double-faced multi-contact structure. According to the armature circuit, the internal resistance of the armature circuit of the motor is greatly reduced, the hardness of running characteristics of the motor is enhanced, and the working efficiency of the tool is improved; due to decreasing of the internal resistance, the current loss of the armature circuit is reduced, and the temperature rise of an electric appliance and contacts is reduced; with the same working efficiency, the battery capacity can be saved, and the battery cost is reduced.

Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

The electrical switch includes two fixed contacts and a rotatable knife contact having a rotational axis and including at least one longitudinal pair of blades flexibly connected to each other. The two fixed contacts as well as the blades in the rotatable knife contact are of a first electrically conductive material composition. The first and the second fixed contact includes a first contact pin and outer ends in the blades in the rotatable knife contact includes a second contact pin. The first contact pin and the second contact pin are of a second electrically material composition, which is different from the first material composition. The first contact pin and the second contact pin pass over each other during a switching event.

The invention refers to a circuit breaker (300A) comprising a vacuum interrupter (301) for a gas insulated switchgear. Moreover, the invention refers to a gas insulated switchgear comprising at least one circuit breaker (300A) and/or a disconnector pole. The circuit breaker (300A) has a vacuum interrupter (301) comprising a first movable contact (302), a second stationary contact (303) and a first center axis (304). Moreover, the circuit breaker (300A) comprises a first insulator (305), a contact unit (306) arranged at the first insulator (305), wherein the first movable contact (302) can be moved towards the contact unit (306) so as to be connected to the contact unit (306), an electrical conducting unit (307) comprising a first side (308) and a second side (309), wherein the first side (308) and the second side (309) are opposite to each other, wherein the vacuum interrupter (301) is arranged at the first side (308) of the electrical conducting unit (307), and a second insulator (310) wherein the second insulator (310) is arranged at the second side (309) of the electrical conducting unit (307), wherein the second insulator (310) is connected to the second stationary contact (303), wherein the second insulator (310) has a second center axis (311), and wherein the second center axis (311) of the second insulator (310) is parallel to or collinear with the first center axis (304) of the vacuum interrupter (301).

A seatbelt buckle device includes a buckle switch (40) having a switch substrate (42) and a slider part (50) which slides on the switch substrate (42) and a frame (20) which has a substantially U-shaped section and slidably holds an ejector (30) which operates synchronously with attachment/detachment of a tongue plate (1). The buckle switch (40) and the frame (20) are assembled integrally with each other as the a leg part (43) as a rear end of the switch substrate (42) is fixed to a side wall (22A) of the frame (20) through a switch substrate housing (45) and thus supported by the frame (20).

A seatbelt buckle device includes a buckle switch (40) having a switch substrate (42) and a slider part (50) which slides on the switch substrate (42) and a frame (20) which has a substantially U-shaped section and slidably holds an ejector (30) which operates synchronously with attachment/detachment of a tongue plate (1). The buckle switch (40) and the frame (20) are assembled integrally with each other as the a leg part (43) as a rear end of the switch substrate (42) is fixed to a side wall (22A) of the frame (20) through a switch substrate housing (45) and thus supported by the frame (20).

A rotary switch includes a rotation movable portion, a movable conductor held in the rotation movable portion, a base portion, a power supply terminal held in the base portion, and a plurality of fixed contacts held in the base portion. The fixed contact and the power supply terminal are connected and disconnected via the movable conductor by a rotational operation of the rotation movable portion. The power supply terminal is disposed at a rotation center position of the rotation movable portion. The plurality of fixed contacts are disposed on a plurality of concentric circles having different diameter dimensions around the power supply terminal.