Abstract: A computer keyboard assembly includes a keyboard and a wrist support which is releasably mounted to the keyboard by a retention device. The retention device includes a slide movably received in a slot defined in a front extension of the keyboard. The slide has an L-shaped top projection defining a channel. A guide plate is fixed to the front extension of the keyboard by a bolt and has an edge movably received in the channel for retaining the slide in the slot and guiding the movement of the slide. A pawl is formed on the slide to be movable therewith between a released position and a secured position. The slide is biased by a spring a toward the secured position where the pawl engages a U-shaped member formed on an underside of the wrist support thereby securing the wrist support to the keyboard.

Abstract: The present invention relates to a keyboard switch which comprises first and second elements alternately engaged with each other and supporting a keycap at the top ends of the elements. The inner edges of the first and second elements are each respectively provided with a corresponding pressing board. The external edges of the first and second elements are provided with a corresponding protruded shaft and a slot to enable restricted movement. When the keycap is pressed at any position, due to the restricted movement, the keycap will move downwardly with a well balanced and stable motion along a shortest distance path to trigger the electrical contact assembly located below when the keycap; when the keycap is released, it will be restored to its original position as a result of a force exerted by an elastic rubber pad mounted within a keyseat.