A circuit breaker with quick response and separation and a quick response and separation method for the circuit breaker. The circuit breaker comprises a breaking contact group (10) and a joint contact group (20). The breaking contact group comprises a movable breaking contact (11). The joint contact group comprises a movable joint contact (21). A movable contact limiting device (31) used for limiting moving positions of the breaking contact and/or the joint contact is arranged between the breaking contact group and the joint contact group. The quick response and separation method for the circuit breaker comprises a breaking and opening step, wherein the breaking contact reversely moves and is separated independently ahead of the joint contact, or the breaking contact and the joint contact reversely move and are separated at the same time. The breaking contact is adopted in the circuit breaker to replace a fixed contact in the conventional art, and when the circuit breaker needs to carry out opening and breaking operation, quick separation between the contacts is realized due to two-way separation action between the breaking contact and the joint contact, so that the electric arc phenomenon can be avoided or reduced, and the service life of the circuit breaker is prolonged.

An electromagnetic contactor comprising a lower frame 10; a fixed core 20 provided to be inserted into the lower frame 10; a bobbin 30 provided at an upper portion of the fixed core 20; a coil 35 coupled to the bobbin 30; a movable core 40 provided at an upper portion of the bobbin 30; a cross bar 50 coupled to an upper portion of the movable core 40; a movable contact 60 coupled to the cross bar 50 to move in an upward and downward direction; an upper frame 70 configured to cover the lower frame 10; and a fixed contact 80 fixed to part of the upper frame 10, wherein a protection base 85 is formed to be protruded from an intermediate portion of the fixed contact 80.

A molded case circuit breaker comprises : a plurality of stationary contact arms (1); a plurality of movable contact arms (3) each having a plurality of contact arm pieces; a switching mechanism (20) providing a driving force to move the movable contact arms (3) to a closing position or an opening position; a driving shaft (22) configured to provide a driving force for simultaneously rotating the movable contact arms (3); a link (8) configured to transmit a driving force; a holder (4, 5) configured to rotate the movable contact arms; an upper arc barrier (10) configured to prevent arcs from moving to a rear side from an upper side of the movable contact arms; and a torsion spring (11) having one end portion (11a) contacting upper surface of the movable contact arms (3) on the opening position, so as to provide an elastic force to the movable contact arms (3) such that the movable contact arms (3) are rotated to the closing position.

A circuit breaker includes: a housing; a stator accommodated in the housing and connected to a terminal unit; a mover selectively brought into contact with the stator; an opening and closing unit manipulating the mover such that the mover is selectively brought into contact with the stator; and an insulating cover provided in the housing and shielding the mover and the stator from the exterior of the housing, wherein the housing or the insulating cover is made by molding an electrical insulating material.

A switch device comprises a support member (4) having at least first and second stationary con­tacts (8a,12b) thereon. An armature (32) is mounted on the sup­port member by means of a body of elastomeric material (46) that is attached to both the support mem­ber and the armature. Deformation of the body of elastomeric material allows the armature to pivot relative to the support member between a first position in which electrically-conductive material (50a,50b) of the armature establishes electrically conductive connection between the stationary contacts and a second position in which the armature is spaced from at least one of the contacts. At least one permanent magnet (42a,42b) is carried by the armature. An electrically-driven switch actuator (20) is mounted stationarily relative to the support member and has first and second energization states. In the first energization state, magnetic material of the switch actuator is in magnetically-coupled relationship with the permanent magnet and a force is produced that causes the armature to assume a selected one of its first and second positions. In the second energization state, a force is produced that causes the armature to assume the other of its first and second positions.

A miniaturized switch particularly suitable for electronic keyboard control applications has a pair of contact members providing spaced contacts, a conductive floating contractor disposed in the space between such contacts adapted to engage both of the contacts to close the switch, a resilient sleeve enclosing the contacts and the space therebetween to encircle the contactor, and actuator means to displace the contactor with the sleeve relative to the contacts to effect closing of the switch.