Keyboard having connecting parts with downward open recesses

A keyboard comprising:

• a plurality of keys, each key having an upper surface and a lower surface with a pair of opposed rounded recesses and a pair of opposed elongated longitudinally extending slots;
• a base plate having an upper surface and a lower surface and a plurality of openings disposed beneath said keys, each said opening generally aligned with each said key, and said base plate further having a pair of opposed rounded recesses adjacent each said opening and open to said lower surface and a pair of opposed elongated longitudinally extending slots adjacent each said opening and open to said lower surface;
• key support mechanisms for supporting each of said keys in generally vertical movement with respect to said plate, each said mechanism comprising first and second pivotally connected levers and having a pivot axis,
• said first lever having a pivot mechanism on one end pivotally connected to said pair of recesses in said key and a sliding mechanism on the other end slidably connected to said slots in said base plate,
• said second lever having a sliding mechanism on one end slidably connected to said slots on said key and a pivot mechanism on the other end pivotally connected to said recesses in said base plate;
• and
• switching elements disposed in each of said openings of said base plate having a movable contact for electrical connection with contacts beneath said keys upon depression of said keys.

A method of assembling a keyswitch assembly comprising a key, a base plate with an opening and a support mechanism for moving the key vertically with respect to the base plate, the key support mechanism including a pair of levers pivotally connected in a scissors arrangement, comprising the steps of:

• providing a pair of downwardly open rounded recesses and a pair of downwardly open elongated slots in the base plate;
• passing lower ends of the connected levers through the opening in the base plate;
• and
• fitting the lower ends of the levers into the recesses and slots from beneath the base plate.