A radio frequency switch connector includes: a metal case; an insulator defining an inserting hole and received in the metal case; an elastic terminal retained to the insulator and having a first soldering portion; and a fixed terminal retained in the insulator and having a second soldering portion, wherein the first soldering portion and the second soldering portion are aligned with each other in a first direction so as to define an imaginary center line in the first direction, the base of the outer case is asymmetrical at two sides of the imaginary center line so as to shift a weight of the radio frequency switch connector.

The electromagnetic relay includes a contact unit, an electromagnet, an armature unit, and a base. The contact unit includes a fixed contact and a movable spring including a movable contact. The armature unit is movable in accordance with excitation of the electromagnet to allow the movable contact to move between a closed position in contact with the fixed contact and an open position away from the fixed contact. The base holds the contact unit and the electromagnet on a certain surface side. The movable contact is placed between the base and the fixed contact in an arrangement direction in which the base and the electromagnet are arranged. The armature unit includes a press part which causes movement of the movable contact by applying a pressing force to a certain surface facing the fixed contact, of the movable spring.

In an embodiment a switching device includes at least two fixed contacts and one movable contact in a switching chamber and at least two auxiliary contacts, two spring contacts and a contact plate in the switching chamber, wherein each of the spring contacts contacts one of the auxiliary contacts with a first contact region and has a second contact region, wherein the contact plate is movable together with the movable contact, and wherein the contact plate is configured to contact the second contact regions of the spring contacts in a first switching state of the switching device and is configured to be arranged at a distance from the second contact regions of the spring contacts in a second switching state.

A switch includes a first switch (100) including a first fixed contact (111) and a first movable contact (121) and a second switch (200) including a second fixed contact (211) and a second movable contact (221). The first fixed contact (111) and the first movable contact (121) come into contact and the second fixed contact (211) and the second movable contact (221) come into contact to turn on the switch. A magnet (320) is installed between the first switch (100) and the second switch (200).

An electrical snap on switch includes a pair of associated contact elements, the contact elements include a fixed contact element and a movable contact element arranged facing the fixed contact element and that may come into contact with the fixed contact element for establishing a first conductive path. The snap on switch may also include a snap-action switching device that includes a tilting driving member pivotally mounted around a horizontal axis between an upper position and a lower position. The movable contact element is a movable portion of an elastically deformable conductive blade. The driving member includes a cam, which cooperates with a cam follower portion of the blade to deform or relax the blade, to cause the movable contact to come into contact, or out of contact, with the fixed contact element, therefore to realize switching.

A contact mechanism includes: a movable touch piece that includes a caulking portion, a pair of arms forked from the caulking portion and respectively having free ends, first and second movable contacts provided at the respective free ends of the pair of arms, and a coupler configured to couple the free ends of the pair of arms; and first and second fixed contacts disposed respectively facing the first and second movable contacts contactably to or separably from the first and second movable contacts.

A temperature-sensitive pellet type thermal fuse having a cylindrical metal case (10) with one end electrically connected to a first lead (L1) and a second lead (L2) installed on the other end via an insulating bushing (50). A temperature-sensitive pellet (30) on a spring (13) is in an inner space (S1) of the case (10). A switch terminal (40) has an upper surface (42) electrically connected to the second lead (L2) by an elastic force of the spring (13). A contact terminal piece (41) extends from the upper surface (42) to contact the inner wall surface (11) of the case 10. An activating member operates when the temperature-sensitive pellet (30) is reduced in height to a predetermined level or less, and releases contact between the contact terminal piece (41) and the case (10) to cut off an electrical connection between the first lead (L1) and the second lead (L2).

A protection device comprises a resin base, PTC component, bimetal component, arm and upper plate which are housed in a resin housing wherein the base includes a terminal integrated with the base by insert molding. A resin cover is formed by insert molding to cover the PTC component, bimetal component, arm and upper plate which are superposed in this order over the terminal within a space in the base. The space in the resin base is substantially closed by the upper plate, the base and the cover are integrally bonded to define the resin housing, the terminal and the arm are electrically connected in series in a normal state, and in an abnormal state where the bimetal component is activated, the terminal and the arm are electrically cut off, while the terminal, PTC component, bimetal component, and arm are electrically connected in series in this order.

An electromagnetic relay includes: an electromagnet; a twin contact set that includes first twin contacts provided on a first movable spring, and second twin contacts that are provided on a first fixed contact plate and disposed opposite to the first twin contacts; a single contact set that includes a first single contact provided on a second movable spring, and a second single contact that is provided on a second fixed contact plate and disposed opposite to the first single contact; and a card that moves in response to excitation or non-excitation of the electromagnet, and moves the first and the second movable springs simultaneously with the movement of the card.

A novel magnetic switch, comprising a housing, a terminal A and a terminal B, wherein an inner cavity of the housing is internally provided with a magnetic body and a tongue plate, one end of the tongue plate is movably connected to the upper end of the terminal B, the magnetic body, which is integrally linked to the tongue plate, is capable of being raised thereon; the other end of the tongue plate is disposed above the terminal A; the upper end of the terminal A is provided with an arc-removing apparatus, the arc-removing apparatus is provided with a stationary contact, and the other end of the tongue plate is provided with a movable contact. The magnetic switch has an effective structure, thus improving the work stability and prolonging the service life of the switch.