A key structure including a base, a pivoting structure and a cap is provided. The base includes a plate, a first limiting unit and a second limiting unit. The pivoting structure includes a first pivoting part and a second pivoting part, the first pivoting part has a connecting shaft, and the second pivoting part has a shaft hole in which the connecting shaft is received and slidable. The cap has a first pivoting unit and a second pivoting unit, one side of the first pivoting part and one side of the second pivoting part are pivotally connected to the first pivoting unit and the second pivoting unit respectively, and the other side of the first pivoting part and the other side of the second pivoting part are slidably disposed in the first limiting unit and the second limiting unit respectively.

A to-be-depressed member includes an elastic dome. A sectional shape of the dome orthogonal to an axis line (X2) of the dome is line-symmetric about a symmetry axis (Ax). The dome has a three-dimensional shape that is symmetric with respect to a virtual plane (Sx) containing the symmetry axis and the axis line. During a swinging movement responsive to a depressing operation, an opposed surface of an opposed member relatively approaches and contacts a distal end of the dome to deform the dome so as to generate a reactive force. As for an angle defined between the axis line of the dome and a normal line (X1) of the opposed surface, the angle (0) in an initial state falls in a range from a first angle variation amount from the initial state to a first-contact state to a second angle variation amount from the initial state to a depression-completed state.

The invention provides a key structure, which includes a carrying plate, a trigger member, a keycap, and a reciprocating member. The trigger member is disposed on the carrying plate, and includes a bearing portion, a pillar portion, a trigger portion and a connecting portion. The bearing portion and the trigger portion are respectively disposed at two opposite sides of the pillar portion, and the pillar portion is perpendicular to the carrying plate. The trigger portion protrudes toward the carrying plate. The connecting portion is circularly disposed at one side of the pillar portion facing the carrying plate, extends from the pillar portion toward the carrying plate, and is obliquely connected to the carrying plate. The keycap is disposed on the bearing portion. The reciprocating member comprises two opposite ends respectively connected to the carrying plate and the keycap.

A keyboard includes a base plate, a keycap, and at least one balance assembly. The base plate has a plurality of connecting structures. The keycap is above the base plate. The balance assembly includes a balance bar and two silencing members. The balance bar is between the base plate and the keycap and is engaged with the keycap. The silencing members are connected to the balance bar and engaged with the connecting structures. The balance assembly is configured to guide the keycap to move relative to the base plate. Hardnesses of the base plate and the balance bar are greater than a hardness of the silencing members.

A key switch includes a base, a key cap, a link bar and a buffer member. A first hook of a first extending arm of the base and a second hook of a second extending arm of the base extend toward opposite directions respectively. An upper linking end of the link bar is movably connected to the key cap. The buffer member is made of material softer than material of the base. When the first hook and the second hook engage with a first engaging portion and a second engaging portion of the buffer member respectively, a recess structure of the buffer member is adjacent to the base to form a restraining structure. A lower linking end of the link bar is movably disposed through the restraining structure. Therefore, the key switch of the present invention has noise reduction capability.

The present invention provides a key structure, including: a key cap, a support board, an elastic element, and a support element. The elastic element includes an elastomer and an elastic piece. The elastomer has a first surface and a second surface, where the first surface includes a first protrusion portion and a second protrusion portion. The support element is connected the key cap and the support board and surrounds the elastic element. When the key cap descends, the first protrusion portion is pressed by the key cap and generates a deformation, so as to form a first pressing stroke, and subsequently, the key cap presses the second protrusion portion to enable the elastic piece to generate a deformation, so as to form a second pressing stroke.

A keyboard switch includes a key top movable vertically on receiving a depressing force, a plunger engaged with a lower portion of the key top and movable vertically with the key top, a cup rubber disposed under the plunger and supporting the plunger from below, a housing arranged on an outer peripheral side of the plunger and cup rubber, a plate supported on the housing and extending laterally, and a spacer interposed between the plate and key top. The spacer is removably mounted onto the keyboard.

A key mechanism including one or more butterfly hinges. Each butterfly hinge may include a double wing design operative to move between a depressed position and non-depressed position. Hinged coupling mechanisms couple respective arms of the wings together. Additionally or alternatively, a key mechanism can include one or more half-butterfly hinges. Each half-butterfly hinge includes a double wing design operative to move between a depressed position and non-depressed position. A hinged coupling mechanism couples one set of corresponding arms of the wings together, while the other set of corresponding arms are not coupled together.

A mouse device includes a mouse shell, a switch module, and a key module. The mouse shell has an upper shell and a lower shell, and the upper shell and the lower shell are joined together to form a chamber. The switch module is disposed within the chamber and is suspended from an inner side of the upper shell. The key module is disposed on an outer side of the upper shell. The key module is vertically movable and has a trigger. The trigger enters the chamber through the upper shell to activate the switch module when the key module is clicked.

A key mechanism including one or more butterfly hinges. Each butterfly hinge may include a double wing design operative to move between a depressed position and non-depressed position. Hinged coupling mechanisms couple respective arms of the wings together. Additionally or alternatively, a key mechanism can include one or more half-butterfly hinges. Each half-butterfly hinge includes a double wing design operative to move between a depressed position and non-depressed position. A hinged coupling mechanism couples one set of corresponding arms of the wings together, while the other set of corresponding arms are not coupled together.