Abstract: An electromagnetic contactor comprises: fixed contact pieces 3 including fixed contacts 9; an electromagnet unit 5 to which a movable contact piece 4, the movable contact piece 4 including movable contacts 10, the movable contacts 10 coming into contact with and being separated from the fixed contacts, is joined via a contact support 11; and a hermetically sealed container 2 configured to contain the fixed contact pieces, the movable contact piece, and the electromagnet unit in the same space, wherein in the electromagnet unit 5, unit-side joining portions 25a and 25b, the unit-side joining portions 25a and 25b being joined to container-side joining portions 33 and 36 arranged on the hermetically sealed container from the direction of movement of the movable contact piece, respectively, are arranged, and flat plate-shaped spacers 34 and 37 by which an inter-contact gap G between the fixed contacts and the movable contacts is adjusted are arranged interposed between the container-side joining portion and the u

Abstract: To more effectively prevent separation of a contact unit at the time of short-circuit in an electromagnetic contactor. A capsule case is made of resin. A fixed yoke is arranged between a pair of fixed contact pieces, and at least a portion of the fixed yoke is held in a skeleton forming a capsule case. A movable yoke is disposed on a movable contact piece and is opposed to the fixed yoke. The fixed yoke and the movable yoke attract each other caused by a magnetic circuit being formed about an axis in a conduction direction in which current flows in the movable contact piece when a contact unit is closed.

Abstract: A piezoelectric element includes a substrate, a lower electrode arranged on the substrate, a piezoelectric film arranged on the lower electrode, and an upper electrode arranged on the piezoelectric film. Membrane portions are configured by the lower electrode, the piezoelectric film, and the upper electrode, and supported in a cantilever manner on the substrate, due to a recess formed in the substrate and a through hole penetrating the lower electrode, the piezoelectric film, and the upper electrode. At least two of the membrane portions have resonance frequencies different from each other.

Abstract: A piezoelectric device includes a base member, a first conductive film arranged above the base member in contact with an upper surface of the base member, a piezoelectric film arranged above the first conductive film in contact with an upper surface of the first conductive film, a second conductive film arranged on the piezoelectric film, and an insulating portion provided inside a trench penetrating through the piezoelectric film and the first conductive film. The insulating portion has a higher electrical resistivity than the piezoelectric film.

Abstract: There is provided an electromagnetic contactor that ensures appropriately preventing a foreign matter from invading an auxiliary contact mechanism housing chamber from a main contact mechanism housing chamber via a through-hole on a partition wall; and a foreign matter from invading the main contact mechanism housing chamber from the auxiliary contact mechanism housing chamber via the through-hole on the partition wall. With an electromagnetic contactor (1), a main contact mechanism housing chamber (A) and an auxiliary contact mechanism housing chamber (B) are partitioned by a partition wall (10). The partition wall (10) has a through-hole (10a) through which a coupling shaft (34) is inserted. A foreign matter invasion prevention mechanism (60) is provided at a peripheral area of the through-hole (10a).

Abstract: A contact device includes a main contact mechanism including a pair of main fixed contacts and a main movable contact elastically supported by a movable shaft and disposed to contact with and separate from the pair of main fixed contacts; an auxiliary contact mechanism disposed at a different position from the main contact mechanism, and including a pair of auxiliary fixed contacts and an auxiliary movable contact disposed in an insulating auxiliary contact holding member connected to the movable shaft to contact with and separate from the pair of auxiliary fixed contacts; and a contact housing portion housing the main contact mechanism and the auxiliary contact mechanism. The movable shaft includes a main contact support portion for supporting the main movable contact, and an auxiliary contact support portion for supporting the auxiliary contact holding member. The main contact support portion is divided from the auxiliary contact support portion.

Abstract: There is provided a contact device including an accommodating case that accommodates a main contact point mechanism having fixed contacts, an external terminal that is disposed outside the accommodating case, and a terminal board that passes through the accommodating case and electrically connects the fixed contacts and the external terminal together. The terminal board has a bent portion surface-contacting with side surfaces of the accommodating case.

Abstract: The contact device includes a main contact mechanism that includes a pair of main fixed contacts and a main movable contact elastically supported by a movable shaft and disposed to be contactable with and separable from the pair of main fixed contacts, an auxiliary contact mechanism that includes a pair of auxiliary fixed contacts and auxiliary movable contacts disposed in an auxiliary contact holding member connected to the movable shaft so as to be contactable with and separable from the pair of auxiliary fixed contacts, and a contact housing portion that houses the main contact mechanism and the auxiliary contact mechanism. The movable shaft has a main contact support portion supporting the main movable contact and an auxiliary contact support portion supporting the auxiliary contact holding member. The main contact support portion and the auxiliary contact support portion are connected to each other via the auxiliary contact holding member.

Abstract: A contact device includes a main contact mechanism including a pair of main stationary contact members and a main movable contact member; an auxiliary contact mechanism disposed at a position different from that of the main contact mechanism and including auxiliary stationary contact members and auxiliary movable contact members; a movable shaft configured to operate the main movable contact member and the auxiliary movable contact member in conjunction with each other; rod-shaped auxiliary terminals electrically connected to the auxiliary stationary contact members; a cover plate having holes through which the auxiliary terminals penetrate; an insulating case configured to house the main contact mechanism and the auxiliary contact mechanism and including an auxiliary terminal case section configured to separate the main contact mechanism and the auxiliary contact mechanism from each other; and a cylindrical body covering the insulating case exteriorly and joined to the cover plate.

Abstract: There is provided an electromagnetic contactor that ensures appropriately preventing a foreign matter from invading an auxiliary contact mechanism housing chamber from a main contact mechanism housing chamber via a through-hole on a partition wall; and a foreign matter from invading the main contact mechanism housing chamber from the auxiliary contact mechanism housing chamber via the through-hole on the partition wall. With an electromagnetic contactor (1), a main contact mechanism housing chamber (A) and an auxiliary contact mechanism housing chamber (B) are partitioned by a partition wall (10). The partition wall (10) has a through-hole (10a) through which a coupling shaft (34) is inserted. A foreign matter invasion prevention mechanism (60) is provided at a peripheral area of the through-hole (10a).

Abstract: A contact device and an electromagnetic contactor using the contact device. The contact device has: a main contact including a pair of fixed contact elements arranged at a predetermined distance from each other and a movable contact element elastically supported by a connecting shaft and arranged to be contactable with and separable from the pair of fixed contact elements; an auxiliary contact arranged at a position different from the main contact and including a pair of fixed contacts arranged at a predetermined distance from each other and a movable contact connected to the connecting shaft and arranged to be contactable with and separable from the pair of fixed contacts; a contact housing configured to house the main contact and the auxiliary contact; and external connection terminals electrically connected to the pair of fixed contacts of the auxiliary contact and projecting from the contact housing.

Abstract: The contact device includes a main contact mechanism that includes a pair of main fixed contacts and a main movable contact elastically supported by a movable shaft and disposed to be contactable with and separable from the pair of main fixed contacts, an auxiliary contact mechanism that includes a pair of auxiliary fixed contacts and auxiliary movable contacts disposed in an auxiliary contact holding member connected to the movable shaft so as to be contactable with and separable from the pair of auxiliary fixed contacts, and a contact housing portion that houses the main contact mechanism and the auxiliary contact mechanism. The movable shaft has a main contact support portion supporting the main movable contact and an auxiliary contact support portion supporting the auxiliary contact holding member. The main contact support portion and the auxiliary contact support portion are connected to each other via the auxiliary contact holding member.

Abstract: A bridge pier structure includes a damper having damping characteristics, a substructure joined with a lower end portion of the damper, and a pillar member provided upright on the substructure, a side surface of the pillar member being joined with an upper end portion of the damper. The damper is substantially parallel to the side surface of the pillar member.

Abstract: A bridge pier structure includes a damper having damping characteristics, a substructure joined with a lower end portion of the damper, and a pillar member provided upright on the substructure, a side surface of the pillar member being joined with an upper end portion of the damper. The damper is substantially parallel to the side surface of the pillar member.