Abstract: A spray painting tool for painting key caps is disclosed, which comprises: a platform, having a plurality of columns formed on a top surface of the same; a panel, having a plurality of holes formed thereon at positions corresponding to the plural columns for allowing the plural columns to pass through the panel therefrom; a diaphragm, disposed on the panel while aligning a plurality of holes formed thereon with the plural columns for allowing the plural columns to pass through the diaphragm therefrom; and at least a holding unit, each being arranged on the panel at a position corresponding to one of the plural column for fixedly securing a key cap. As the diaphragm can be easily replaced, the spray painting tool can be used repetitively without worrying the stacking of residue paint on its panel. Moreover, as the spray painting tool is simple in structure and ease to use, painting key caps can be achieved with lower cost and less time.

Abstract: A keyboard structure includes a base, a circuit board, at least two keycaps and at least two linkages. The circuit board is disposed on the base. The two keycaps are adjacent to each other and disposed on the circuit board. Each keycap has a soft and a hard film. The soft film covers the hard film, the soft film has a pressing part penetrating the hard film, and the two soft films of the two keycaps are connected to each other. The two linkages are respectively disposed between the two keycaps and the base. Each of the linkages has two bars connected to each other, and each of the bars has one end connected to the base and the other connected to the hard film. The two keycaps can move up and down via the two linkages and press the two pressing parts to trigger the circuit board.

Abstract: A keyboard with a wobble prevention structure, which is substantially a substrate having at least one press key arranged thereon while enabling each press key to be driven to move in a reciprocating manner following a specific direction, and having a plurality of position limit devices disposed on the substrate and beneath the periphery of a corresponding press key. In a preferred aspect, each position device is integrally formed with the substrate, or can be formed on the substrate by stamp forming technique, that each is used to confine the corresponding press key to move following only the specific direction, such that the wobbling of the press keys is prevented.