The disclosure provides a key structure, including a bottom plate, a switch element, a keycap, a positioning element, and a linkage rod. The switch element is disposed on the bottom plate. The keycap is disposed on the switch element, and the switch element is located between the bottom plate and the keycap. The positioning element is connected to the bottom plate and located between the bottom plate and the keycap. The linkage rod is disposed between the keycap and the positioning element. The linkage rod has a portion disposed at a position corresponding to a groove, and two opposite sides of the linkage rod are each in contact with the keycap and the positioning element.

A key structure includes a bottom plate, at least one keycap, and a thin-film circuit board. The bottom plate has at least one elastic protruding portion. The keycap is liftably connected to the bottom plate and has a press portion and at least one trigger portion. The press portion is located at a central region of the keycap and faces the elastic protruding portion, and the trigger portion is located at a peripheral region of the keycap. When the key is lowered from a first position to a second position relatively to the bottom plate, the press portion downwardly presses the elastic protruding portion, and the press portion triggers an electrical trigger point of the thin-film circuit board. The keycap is adapted to be restored from the second position to the first position through an elastic force of the elastic protruding portion.

A keyswitch assembly includes a switch module, a support mechanism, a blocking mechanism, an enhancing light source, and a backlight source. The switch module includes a substrate, a signal generator, and a signal sensor. The signal generator generates a sensing signal. The signal sensor receives the sensing signal to obtain a sensing strength. The support mechanism is disposed on the substrate. The blocking mechanism is disposed on the substrate and has a light-permeable portion. A portion of the blocking mechanism inserts into or escapes from a gap between the signal generator and the signal sensor. The backlight source is disposed on the substrate and located outside the vertical projection of the blocking mechanism on the substrate. The enhancing light source is disposed on the substrate and located within the vertical projection of the blocking mechanism on the substrate and corresponds to the light-permeable portion.

A keyboard device includes a substrate, a keycap on the substrate, a first link member connected between the substrate and the keycap and is adjacent to the first side portion of the keycap, and a second link member connected between the substrate and the keycap and is adjacent to the second side portion of the keycap. The two first short swing arms of the first link member are respectively connected to two ends of the first pivot arm of the first link member. A length of each first short swing arm is less than half of a length of the first pivot arm. The two second short swing arms of the second link member are respectively connected to two ends of the second pivot arm of the second link member. A length of each second short swing arm is less than half of a length of the second pivot arm.

An electrically driven fastener structure includes a body, a fastening unit and a wire. The body has a first assembly portion. The fastening unit has a second assembly portion corresponding to the first assembly portion. The wire is adapted to pass a current and to pass through the first assembly portion or the second portion to form a magnetic switch using the first assembly portion or the second assembly portion, so as to drive the magnetic switch based on on or off or strong or weak of the current, or to drive the magnetic switch based on on or off or strong or weak of a magnetic force.

A key structure including a base, a light sensing module, a carrier, a magnetic member, a cap, and a scissor structure are provided. The light sensing module is disposed at the base. The carrier is located above the base. The magnetic member is disposed on the carrier. The cap is adapted to be assembled to the carrier via a magnetic attracting force of the magnetic member or adapted to be detached from the carrier via overcoming the magnetic attracting force of the magnetic member. The scissor structure is connected between the base and the carrier. The carrier and the cap disposed thereon move up and down relative to the base via the scissor structure. An orthogonal projection of the magnetic member on the base is not overlapped with an orthogonal projection of the light sensing module on the base. A keyboard is also provided.

An electronic device and a key coupling unit therefor are disclosed. The key coupling unit includes a key configured in a specific shape, a key guide frame configured to guide pressing of the key, and a key circuit board configured to input a signal corresponding to the pressing of the key. The key coupling unit is fixed in a settling area of a bracket. A bumper is formed to protrude from the lower part of the key circuit board. A pressing part is formed in the bracket to face the bumper of the key circuit board. A command signal of a corresponding key is transmitted to the key circuit board by converting to an electric signal if the bumper presses the pressing part. The bumper and the pressing part are located by moving in a lateral direction from the center of the settling area of the bracket.

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.

A keyswitch includes a board having a first magnetic portion and a pivot portion, a cap, a switch, and a support device including a first support member having first and second bodies connected to each other via an elastic connection arm. The first body has first and second end portions connected to the cap and the pivot portion respectively. The second body has a second magnetic portion and a triggering portion. A U-shaped slot is formed around the triggering portion to make the triggering portion form an elastic cantilever arm extending from the second body. When the cap is pressed to make the second magnetic portion away from the first magnetic portion at a specific distance, the triggering portion triggers the switch. When the cap is released, a magnetic force between the first and second magnetic portions drives the second magnetic portion to approach the first magnetic portion.

A keyswitch structure includes a keycap support mechanism and a keycap that is supported by the keycap support mechanism in a vertical direction. The keycap support mechanism includes a base and two supports. The base has two sliding slots. Each sliding slot has an opening in a horizontal direction and an obstruction block at the opening. The horizontal direction is perpendicular to the vertical direction. Each support has a sliding portion and a linkage portion. The sliding portions slide parallel to the horizontal direction in the sliding slots correspondingly. The obstruction block prevents the corresponding sliding portion from disengaging from the corresponding sliding slot. The two linkage portions push against each other in line contact, so that the two supports are mutually driven through the two linkage portions.