A balance mechanism (180) and a keyboard switch (100) including the balance mechanism (180) are provided. The balance mechanism (180) comprises a first frame (181) and a second frame (182) rotatable relative to each other, which are both of hollow structures with matched shapes and sizes. When the first frame (181) and the second frame (182) are in a superimposed state, a dynamic contact (130) and a static contact (120) are electrically connected. A relative rotation between the first frame (181) and the second frame (182) drives the moving contact (130) to move, achieving separation and contact between the dynamic contact (130) and the static contact (120), thereby turning on and off the switch. The keyboard switch (100) is thin, thus achieving miniaturization of the switch; the switch prevents a guide core (160) from tilting and being stuck in the button, which is convenient for operation.

A key structure includes a base plate, a keycap and a connecting element. The connecting element includes a first frame and a second frame. The first frame is connected with the base plate and the keycap. The first frame includes a first linking part. The second frame is connected with the base plate and the keycap. The second frame includes a second linking part. The second linking part is contacted with the first linking part. When a depressing force from the user is applied to the keycap, the first frame is swung relative to the second frame. Moreover, in response to a friction between the first linking part and the second linking part, the keycap is correspondingly moved.

A keyboard device includes a key structure, a switch circuit board, a base plate, a soft covering element and a buffering pad. The key structure includes a keycap and a stabilizer bar. The stabilizer bar is connected with the keycap and the soft covering element. The soft covering element is disposed on the base plate. An accommodation space is defined by the soft covering element and the base plate collaboratively. The stabilizer bar is inserted into the accommodation space, so that the stabilizer bar is connected with the base plate. The buffering pad is disposed on the base plate and partially received within the accommodation space. The stabilizer bar and the base plate are made of metallic material. Since the stabilizer bar and the base plate are separated by the soft covering element and the buffering pad, the keyboard device is capable of reducing noise.

A key structure includes a base plate, a keycap and a connecting element. The connecting element includes a first frame and a second frame. The first frame is connected with the base plate and the keycap. The first frame includes a first linking part. The second frame is connected with the base plate and the keycap. The second frame includes a second linking part. The second linking part is contacted with the first linking part. When a depressing force from the user is applied to the keycap, the first frame is swung relative to the second frame. Moreover, in response to a friction between the first linking part and the second linking part, the keycap is correspondingly moved.