A circuit interrupter includes: a first fixed terminal including a first fixed contact; a movable contactor which is formed as a separate part from the first fixed terminal and includes a first movable contact; a holding unit configured to hold the movable contactor so that the first movable contact is connected to the first fixed contact; and a squib configured to generate gas by combustion. In the circuit interrupter, pressure of the gas generated by the squib causes movement of the movable contactor in a direction away from the first fixed terminal so that the first movable contact is separated from the first fixed contact.

A circuit interrupter includes: a first fixed terminal including a first fixed contact; a movable contactor which is formed as a separate part from the first fixed terminal and includes a first movable contact; a holding unit configured to hold the movable contactor so that the first movable contact is connected to the first fixed contact; and a squib configured to generate gas by combustion. In the circuit interrupter, pressure of the gas generated by the squib causes movement of the movable contactor in a direction away from the first fixed terminal so that the first movable contact is separated from the first fixed contact.

A movable contact of a contact device includes a first contact unit and a second contact unit that come into contact with outer surfaces of fixed terminals and a connecting portion connecting the first contact unit and the second contact unit. Here, the first contact unit separates from the outer surface by moving in a direction that is different from a moving direction of a moving body and that intersects an extending direction of a portion that makes contact with the first contact unit of the outer surface. Also, the second contact unit separates from the outer surface by moving in a direction that is different from the moving direction of the moving body and that intersects an extending direction of a portion that makes contact with the second contact unit of the outer surface.

A contact piece structure includes two movable contact pieces arranged side by side. Each movable contact piece includes a piece body, a movable contact and a static contact located at opposite ends of the piece body. The movable contact and the static contact of one of the movable contact pieces correspond to the static contact and the movable contact of the other movable contact piece respectively so as to form a parallel circuit structure when the contacts being in contact; Bending portions of two piece bodies are arranged one-to-one to form a bending pair; in each of the bending pairs, top ends of two bending portions are parallel with each other; two bending portions protrude along a same protruding direction, a first distance between the two bending portions is smaller than a second distance between the two ends of two piece bodies.

Disclosed is a relay. The relay includes a first fixed contact connected to a power source, a second fixed contact separated from the first fixed contact, and connected to a load, and a moving contact configured to be brought into contact with or separated from the first fixed contact and the second fixed contact. The moving contact includes a first moving contact configured to be brought into contact with or separated from the first fixed contact and the second fixed contact and a second moving contact separated from the first moving contact, and configured to be brought into contact with or separated from the first fixed contact and the second fixed contact. Accordingly, the moving contact can be prevented from being separated from the fixed contact by an inter-electron repulsion.