A switch seat body structure and a manufacturing method thereof. The switch seat body structure is simplified and can be easily manufactured to enhance the resistance of the switch seat body against the external damaging force. The switch seat body structure includes a main body for assembling with an internal component of the switch. The main body is an assembly of a metal head section and a nonmetal belly section. The metal head section has a shoulder section, a skirt section connected with the shoulder section and a subsidiary shoulder section formed on the skirt section. The nonmetal belly section is overlaid and connected on at least a part of the skirt section or the entire skirt section, whereby the nonmetal belly section is connected with subsidiary shoulder section to form an integrated structure.

The present disclosure provides a conductive member for a circuit breaker high voltage portion conductor assembly, the conductive member including a body with a transfer portion and a coupling portion. The body transfer portion has an electro-thermally efficient contour. That is, the body transfer portion has an electrically efficient contour and a thermally efficient contour. The body transfer portion includes a number of slots defining fins. In this configuration, the body transfer portion distributes current generally evenly across a cross-sectional area of the conductive member body. Further, the fins provide heat dissipation via convection.

An electronic device includes a housing and a button. The housing has a first surface and a second surface opposite to the first surface, and defines a mounting hole passing through the first surface and the second surface. The mounting hole has an inner surface. The button is received in the mounting hole, and includes a metallic keycap and an annular buffer member. The keycap has a peripheral side surface, and defines a receiving groove on the peripheral side surface which extends around the peripheral side surface. The buffer member is composed of flexible material, sleeved on the keycap cap, partially received in the mounting hole, and partially positioned outside of the mounting hole to resist the second surface of the housing.

A thermal sensor with a simple structure can secure the deformability of a bimetal, and accurately control the position of the bimetal, to increase the response speed (heat response) of the bimetal. The thermal sensor includes a bimetal, a case, and a cover member. A pressing portion is provided between the cover member and the bimetal to press the bimetal to a bottom portion of the case. The pressing portion is deformable in accordance with the deformation of the bimetal.

A rotary switch fitted with signalling means to provide a visual indication of the operating condition of an actuator device, comprising a switch body made of metal or coated externally in metal and a cover is provided. The cover may be joined to close the switch body by means of a plurality of attachment screws in metal or externally coated in metal, each housed in seats arranged in the cover and in the switch body. In particular, inside the seat of the switch body there may be an insert made of a material suitable to prevent the circulation of galvanic currents between the seat of the switch body and the attachment screw.

A metallic button includes a metallic keycap and an annular buffer member. The metallic keycap has a peripheral side surface, and defines an annular receiving groove and a notch communicating with the annular receiving groove on the peripheral side surface. The annular receiving groove extends around the peripheral side surface. The buffer member is composed of flexible material, sleeved on the keycap, and partially received in the annular receiving groove and the notch.

A sealed contact device having a small number of components and high productivity. In the sealed contact device a ring-shaped flange portion extending laterally from a lower opening edge part of a metallic case is welded and integrated with an upper surface of a plate-shaped yoke to form an internal space and a stationary contact and a moving contact are opposed to each other in the internal space so as to enable approach/separation. A ring-shaped projection provided along a lower surface of the ring-shaped flange portion is integrated with the upper surface of the plate-shaped yoke by resistance welding.

An electrical circuit switching device includes a discharge chamber in which a combustion gas from the igniter is discharged when the igniter is actuated; a casing having conductivity and defining at least a part of the discharge chamber; and a pair of first conductor pieces arranged outside the discharge chamber in a state of being separated from each other, each of the pair of first conductor pieces forming a part of the first electrical circuit, in which before actuation of the igniter, at least one of the pair of first conductor pieces and the casing are in a non-contact state with each other and thus the first electrical circuit is in a disconnection state, and when the igniter is actuated, the casing is deformed and thus expands to an outside of the discharge chamber by energy of a combustion gas generated by actuation of the igniter.