A switch assembly including a socket, a top cap, and an intermediate cart located in the socket. The intermediate cart is slidable with the socket. The top cap is in a spherical or pivot engagement with the intermediate cart. An activation force of the sliding movement is lower than an activation force of the spherical or pivot movement.

A switch assembly including a socket, a top cap, and an intermediate cart located in the socket. The intermediate cart is slidable with the socket. The top cap is in a spherical or pivot engagement with the intermediate cart. An activation force of the sliding movement is lower than an activation force of the spherical or pivot movement.

A controller includes a key top, a substrate, and an elastic member. The elastic member includes a pressed portion, a base, a skirt portion, and a pressing member. The substrate includes a contact. When viewed in the first direction, the pressing member is surrounded by an outer peripheral edge of a prescribed region. In the second direction, a distance between an end of the outer peripheral edge of the prescribed region on a side of a swing center of the key top and an end of a top surface on the side of the swing center is longer than a distance between an end of the outer peripheral edge of the prescribed region opposite to the swing center and an end of the top surface opposite to the swing center. In the second direction, the contact is located closer to the swing center than the top surface.

A switch assembly including a socket, a top cap, and an intermediate cart located in the socket. The intermediate cart is slidable with the socket. The top cap is in a spherical or pivot engagement with the intermediate cart. An activation force of the sliding movement is lower than an activation force of the spherical or pivot movement.

A key structure, including a base plate, a thin film circuit, a dome switch, a scissor structure, an elastic piece, and a keycap, is provided. The thin film circuit is disposed on the base plate. The dome switch is disposed on the thin film circuit. The scissor structure is disposed on the base plate, wherein the scissor structure includes a first support and a second support pivotally connected to the first support, and the second support surrounds the first support. The first support has a trigger part, and the second support has a chamber disposed corresponding to the trigger part. The elastic piece is engaged inside the chamber, wherein the elastic piece has an interfering part located outside the chamber, and the interfering part is located on a moving path of the trigger part. The keycap is disposed on the scissor structure and the dome switch.

A keyboard device includes plural key structures. Each key structure includes a base plate, a keycap, a membrane circuit board, a connecting member and an elastic element. The keycap includes a pressing post. The membrane circuit board is arranged between the base plate and the keycap. The connecting member is penetrated through the membrane circuit board and connected between the keycap and the base plate. The keycap is movable upwardly or downwardly relative to the membrane circuit board. The elastic element is arranged between the keycap and the membrane circuit board. The elastic element includes a resilience piece and plural supporting ribs. The plural supporting ribs are arranged between the resilience piece and the keycap. The plural supporting ribs are contacted with the pressing post of the keycap. Consequently, there is a gap between the pressing post and the resilience piece.

A key switch includes a base plate, a key top, a pair of link members, and a switch mechanism. The key top is above the base plate. The link members support the key top and operate in an interlocked manner to allow the key top to be lifted and lowered with respect to the base plate. One of the link members includes a projecting portion at a distal end of an arm of the link member. The other one of the link members includes a concave receiving portion at a distal end of an arm of the link member. The projecting portion is rotationally fitted to the concave receiving portion. The switch mechanism is disposed between the base plate and the key top and is configured to open and close a contact portion of an electric circuit in accordance with lifting and lowering operation of the key top.

An electrical switch (100) includes an insulative housing (110) forming a receiving space therein, a fixed contact set (121, 122) retained in the housing (110), a movable contact set (131, 132) located above the fixed contact set (121, 122), and a cover (140) mounted upon the housing, wherein the moveable contact set (131, 132) further includes at least three outwardly and downwardly extending protrusions (133) on a periphery at equal intervals so as to support up-and-down movement of the moveable contact set (131, 132) during operation with a superior manual feeling.

A key mechanism is disclosed. The key mechanism comprises a keycap, a dome support structure positioned relative to the keycap and defining an opening, an actuation mechanism coupled to the keycap, and a collapsible dome positioned in the opening of the dome support structure. The actuation mechanism is configured to movably support the keycap relative to the dome support structure. The dome comprises an upstop member configured to limit upward travel of the collapsible dome.

The present disclosure discloses a composite rubber dome including a supporting part, an elastic connecting part, and a pressing part which are integrally molded with a silicon rubber material, wherein the pressing part is further provided with a composite part compositely molded with a rubber dome body by adopting an embedding or injection molding method and made of a non-silicon rubber material having higher hardness than the silicon rubber material, and the composite part and the pressing part are coaxially and correspondingly disposed in a pressing direction and the composite part is disposed on a side, in contact with a keycap, of an axial outer end of the pressing part, or a side, corresponding to a thin film circuit layer, of an axial inner end of the pressing part.