| 摘要 |
<p>A modular keyboard includes a plurality of press keys 115, an upper casing 11 for sealing to a lower casing 13 and forming an enclosure space between. A circuit board 17 is installed in the enclosure space and between an electric conduction element 15 and the lower casing. The upper casing and the lower casing can be plastic, engaged with each other by means of a groove (fig 1b 117) and combined using supersonic welding technique, to seal the enclosure space, enclosing and isolating the electric conduction element and the circuit board from the exterior. The electric conduction plate can be a circular metal plate sticker or carbon particle. The keyboard is made waterproof by welding the upper and lower casings as a whole.</p> |
