A breaker 1 has a fixed contact 21, a movable piece 4 which has an elastic portion 43 formed in a plate shape and being elastically deformable, and a movable contact 41 in one end portion of the elastic portion 43, so as to press the movable contact 41 against the fixed contact 21, a thermally-actuated element 5 which is deformed in accordance with a temperature change, and shifts from a conduction state in which the movable contact 41 contacts with the fixed contact 21 to a shut-off state in which the movable contact 41 separates from the fixed contact 21, and a case 10 which accommodates the fixed contact 21, the movable piece 4, and the thermally-actuated element 5. The case 10 has a side wall 11 extending in a long direction Dl of the movable piece 4, and the side wall 11 is provided, in an adjacent portion to the thermally-actuated element 5, with a convex portion 14 protruding toward the outside of the case 10.

The resin molded article is molded by using an electrode sheet as an insert in a state where one surface of the electrode sheet is closely attached to an inner surface which serves as the inner side of the operation surface. The electrode sheet is formed by using, as a base material, a thermoplastic synthetic resin sheet which outputs an electrical signal according to the amount of change of electrostatic capacitance generated by a contact operation with respect to the operation surface. At least a whole or a part of the inner surface is formed in a three-dimensionally curved surface, and a passage is formed in the electrode sheet so as to allow a molten resin following in through a gate formed in a die which comes into contact with the other surface of the electrode sheet during molding to pass toward one surface side of the electrode sheet.

A keyboard includes a substrate, a limit connecting member, a keycap, and a liftable connecting member. The assembly area of the substrate includes a through hole and a curved side wall standingly disposed on the substrate. The bottom edge of the curved side wall is adjacently connected to a periphery portion of the through hole. One side of the curved side wall facing the through hole includes a recessed groove. The limit connecting member is disposed on the assembly area and includes an inner fixing portion received in the through hole and an outer fixing portion enclosing the curved side wall and fixing with the inner fixing portion. The inner fixing portion has a protruding portion received in the recessed groove. The keycap is disposed on the assembly area. The liftable connecting member is connected between the keycap and the assembly area and is assembled with the limit connecting member.

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 case includes a first metal plate, a dome shape metal plate, and a second metal plate. The first metal plate includes a first ring in which a plurality of first recesses are arranged along the first ring shape, and a second ring in which a plurality of second recesses are arranged along the second ring shape. The second metal plate includes a third ring in which a plurality of third recesses are arranged along the third ring shape, and a fourth ring in which a plurality of fourth recesses are arranged along the fourth ring shape. A direction along a line passing through a center of the first ring and a center of the second ring is different from a direction along a line passing through a center of the third ring and a center of the fourth ring.

A keycap forming method includes the following steps. Firstly, a stabilizer bar is formed through a first male mold and a first female mold according to an injection molding process, and a keycap is formed through a second male mold and a second female mold according to the injection molding process. Then, the stabilizer bar is fixed on the first male mold, and the keycap is fixed on the second female mold. Then, the first male mold and the second female mold are stacked on each other, so that the stabilizer bar and the keycap are combined together. Then, the first male mold and the second female mold are separated from each other, so that the stabilizer bar is detached from the first male mold. By using the keycap forming method, it is not necessary to manually assemble the stabilizer bar with the keycap.

Embodiments are directed to a low profile key for a keyboard having an overmolded support structure. In one aspect, an embodiment includes a key cap having an illuminable symbol. A support structure having a pair of overmolded wings may pivotally couple to the key cap. A switch housing may surround the support structure and connect each of the first and second wings. A tactile dome may be at least partially positioned within the switch housing and configured to bias the key cap upward. A sensing membrane may be positioned along an underside surface of the tactile dome and configured to trigger a switch event in response to a collapsing of the tactile dome caused by a depression of the key cap. A feature plate may be positioned below the sensing membrane. A light guide panel may define at least one light extraction feature that may be configured to propagate light toward the key cap and cause illumination of the illuminable symbol.

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 waterproof keyboard structure and an assembly method thereof are provided. The waterproof keyboard structure includes a keyboard module, and a keyboard frame framing on the keyboard module, wherein an elastic waterproof layer is formed by means of double injection or insert molding on the keyboard frame. The keyboard module is defined with a key surface, and an assembly surface arranged opposite to the key surface. The elastic waterproof layer is clad on the key surface, and the keyboard module with the assembly surface facing a seat is assembled together with the keyboard frame in an accommodating space, thereby having the elastic waterproof layer closely fit with the seat to form a waterproof ring.

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.