A fuse assembly including a fuse connected to two busbars, an injection molded base and an injection molded cover. The busbars are powder-coating with a powder-based adhesive or adhesion promoter, then cured in an oven. The busbars are then placed in the cavity image of an injection molding apparatus. Plastic is heated to a liquid form and injected into the cavity image. The resulting injection molded base is resistant to both dust and water, protecting the fuse inside.

The present invention discloses a method to manufacture a keycap for keys of a keyboard, including: providing a top fabric layer and a molding film disposed beneath the top fabric layer; molding the molding film and the top fabric layer to form a film structure having an inner surface; and providing a keycap body having an upper surface, wherein the outline of the upper surface matches with that of the inner surface to form the keycap. In the present invention, the keycap is formed using the film structure and the keycap body by plastic injection or adhesion agent, the keycap is further manufactured as keys, and a symbol is engraved on the upper surface of the film structure by laser. Because the backlit device's light transmits through the keycap, users can recognize the symbols on the keys.

A switch device includes a housing including a recessed portion, a metal member, and a movable contact point member. The recessed portion is recessed in a thickness direction from an opening formed in a first surface. The metal member includes a terminal protruding from the housing, a fixed contact point exposed to an inner side of the recessed portion, and a connection portion connecting the terminal and the fixed contact point. The movable contact point member is provided in the recessed portion and is configured to move to connect to or disconnect from the fixed contact point. A sealing unit is provided in a gap between the connection portion and the housing. The sealing unit is made by solidifying a sealing agent supplied through a hole portion that is in communication with the connection portion from a second surface opposite to the first surface of the housing.

A breaker has a fixed contact, a movable piece which has an elastic portion formed in a plate shape and being elastically deformable, and a movable contact in one end portion of the elastic portion so as to press the movable contact against the fixed contact, a thermally-actuated element which is deformed in accordance with a temperature change and shifts from a conduction state in which the movable contact contacts with the fixed contact to a shut-off state in which the movable contact separates from the fixed contact, and a case which accommodates the fixed contact, the movable piece, and the thermally-actuated element. The case has a side wall extending in a long direction of the movable piece, and the side wall is provided, in an adjacent portion to the thermally-actuated element, with a convex portion protruding toward the outside of the case.

A keyboard includes a base plate, a hook structure, and a plastic engaging member. The base plate has a top surface. The hook structure is connected to the base plate and raised relative to the top surface. The plastic engaging member is located on the top surface and fixed to at least a part of the hook structure.

A switch device includes a housing including a recessed portion, a metal member, and a movable contact point member. The recessed portion is recessed in a thickness direction from an opening formed in a first surface. The metal member includes a terminal protruding from the housing, a fixed contact point exposed to an inner side of the recessed portion, and a connection portion connecting the terminal and the fixed contact point. The movable contact point member is provided in the recessed portion and is configured to move to connect to or disconnect from the fixed contact point. A sealing unit is provided in a gap between the connection portion and the housing. The sealing unit is made by solidifying a sealing agent supplied through a hole portion that is in communication with the connection portion from a second surface opposite to the first surface of the housing.

A key structure includes a keycap, a guiding structure, a connection member and a base plate. The guiding structure is located below the keycap and includes at least one pivot shaft. The connection member includes a connection groove, and the at least one pivot shaft is connected to the connection groove. The base plate includes at least one fixing member. The connection member envelops the at least one fixing member such that the connection member is fixed to the base plate.

A metal contact member 10 includes a metal sheet 15, which has a plurality of streaky projecting portions extend along each other on a front surface 15A of the metal sheet 15. A rubber switch member 12 includes the metal contact member 10 and a rubber switch body 11 joined to the metal contact member 10.

A switch includes a housing, a switching mechanism housed in the housing and configured to switch a state of connection between at least two terminals exposed out of the housing by using a common contact and two switching contacts, and an electronic component that is disposed in the housing and electrically connects the terminals to each other. The switching mechanism includes a first metal plate that is connected to a first contact, which is one of the common contact and the two switching contacts, and includes a first exposed part to which a first electrode of the electronic component is soldered by laser irradiation, and a second metal plate that is connected to a second contact, which is another one of the common contact and the two switching contacts, and includes a second exposed part to which a second electrode of the electronic component is soldered by laser irradiation.

A switch structure includes a light-emitting part configured to receive power from a vehicle and to radiate light, a moving block located so as to surround the light-emitting part, a light-transmissive part configured to allow light radiated from the light-emitting part to pass through an opening in the moving block, and a film-printing layer located on a top surface of the light-transmissive part and including a symbol.