A switching device (1) for an encapsulated electric power distribution switchgear comprising a switch (10), an electrically conductive housing (20) to which the switch is mounted, and which housing (20) comprises an opening (24) that leads into the housing (20). The switch comprises a first electric contact (12) connected to a first conductor (16) and a second electric contact (14) connected to a second conductor (18), the second contact being movable in relation to the first contact and in relation to the housing. The further comprises an operating shaft (30) of electrically insulating material being rotatable about its longitudinal axis Y in relation to the housing, and which is inserted into the housing via the opening (24), and an actuator member (40) located inside the housing and having a first end (42) coupled to the shaft and a second (44) end coupled to the second contact (14). The actuator member is made of an electrically insulating material. The shaft (30) extends through the opening (24) and into the housing without directly contacting the housing (20) and is supported in the housing (20) by the actuator member. The actuator member (40) is movably supported in the housing (20) at a connection area (26) that forms an interface (27) between the actuator member and the housing. The interface is located at a distance D from the longitudinal axis Y of the shaft that is longer than a distance d between the longitudinal axis Y of the shaft and a circumferential edge (23) that delimits the opening (24) in the housing, which first and second distances are measured in the same radial direction in relation to the longitudinal axis Y.

A thermal switch includes a thermally responsive plate assembly (7) including a metal support (10) deforming from an initial shape before a header plate assembly (6) is secured to a housing assembly (5), with a result that a position of a movable contact (9) in the housing assembly (5) is adjusted so as to be within a predetermined height range relative to an open end of a housing (3). A contact pressure of switching contacts after the assembling is produced by the height adjustment, and subsequently, a neighborhood of a part of the housing (3) to which part the thermally responsive plate assembly (7) is secured is deformed, so that an operating temperature is calibratable.

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 (100) for assembling with an internal component (30) of the switch. The main body (100) is an assembly of a metal head section (10) and a nonmetal belly section (20). The metal head section (10) has a shoulder section (11), a skirt section (12) connected with the shoulder section (11) and a subsidiary shoulder section (13) formed on the skirt section (12). The nonmetal belly section (20) is overlaid and connected on at least a part of the skirt section (12) or the entire skirt section (12), whereby the nonmetal belly section (20) is connected with subsidiary shoulder section (13) to form an integrated structure.

To provide a switch wherein it is possible to easily form a hermetic receptacle. A switch has installed in an arc extinguishing container (102) a pair of fixed contacts (104A), (104B) disposed maintaining a predetermined space therebetween and a movable contact (106) disposed so as to be able to come into and out of contact with the pair of fixed contacts, wherein the arc extinguishing container (102) is configured of an open-topped, tub-shaped metal body (103), an insulating holding member (105) which holds the pair of fixed contacts, disposed on the inner side of the tub-shaped metal body, opposite the movable contact, and an open-bottomed, tub-shaped resin cover (107) which covers the pair of fixed contacts and the movable contact from the open edge face side of the tub-shaped metal body, and wherein the periphery of the open edge of the resin cover (107) is sealed to the bottom surface of the tub-shaped metal body (103) with an adhesive agent.

The present disclosure provides high temperature thermal cutoff devices having a high-temperature thermal pellet with a transition temperature of greater than or equal to about 240°C and comprising at least one organic compound. The pellet is disposed in a housing, which is sealed with a high-temperature seal that provides substantial sealing up to at least the transition temperature. The high-temperature TCO also has a current interruption assembly, which establishes electrical continuity in a first operating condition corresponding to an operating temperature of less than said transition temperature and discontinues electrical continuity when the operating temperature exceeds the transition temperature. Methods of making such high-temperature thermal cut off devices are also provided.

The object of the present invention is to utilize a reinforcing plate formed out of a hard resin or a metal introduced into a key unit in order to overcome the weak point such that the conventional rubber keypads are too soft and lack shape stability, as a functional design element of equipment including a key unit into which the plate is incorporated. A support frame 4a for surrounding and supporting key groups arrayed on a key-operating surface of a key unit 1 in a manner such as a picture frame is formed by processing the outer edge of a reinforcing plate 4, and the key unit can be installed to mobile equipment directly from the outside of casing through the support frame, for example, by fitting the support frame 4a into an opening provided on the casing of the mobile equipment into which the key unit should be incorporated. As a material for a hard resin reinforcing plate, there are used PC (polycarbonate resin), PET (polyethylene terephthalate resin), PMMA (polymethylmethacrylate/acrylate resin), and a mixture thereof. As a material for a metal reinforcing plate 4, there can be used various metals such as magnesium, aluminum, stainless steel, titanium, copper, gold, etc., and an alloy thereof. For a decoration to the support frame or the exposed part of the reinforcing plate, there are used printing, painting, or various film-forming methods with a metal or a nonmetal.

A switch assembly comprising a housing (11), a rigid operating member (17) mounted for movement relative to the housing (11) and accessible to an operator, electrical contact means (31, 32, 36) operable by movement of the operating member (17) from a rest position to an operative position relative to the housing (11), flexible seal means (19) between the operating member (17) and the electrical contact means (31, 32, 36) and capable of transmitting operative movement of the operating member to said contact means while preventing passage of moisture and other contaminants from the region of the operating member to the contact means, and, limit means (27) preventing movement of the operating member (17) relative to the contact means beyond the position at which the contact means is operated. The switch can include further operating members and associated contacts and limit means carried by the housing and if desired the assembly can incorporate a heater (38) for heating the operating member region of the assembly.

Zum Schutz gegen elektromagnetische Störstrahlung und elektro­statische Entladung besteht das Unterteil (1) des Gehäuses aus Metall, das Oberteil (2) aus einer Leiterplatte, deren Leiter­bild (6) sich auf der Innenfläche befindet, während die Ober­fläche einen durchgehenden Metallbelag (5) aufweist, der mit dem Gehäuseunterteil (1) trennbar kontaktiert ist. In dem Gehäuse sind weitere elektronische Baugruppen (4) angeordnet, die leicht auswechselbar sind, ebenso kann die das Gehäuseober­teil (2) bildende Leiterplatte mit der Tastatur gegen eine andere, beispielsweise eine Folientastatur, leicht ausgewech­selt werden.

Die Erfindung wird angewandt bei Tastaturen für Rechner.