Patent ID: 7550687

Claim:
An architecture effectively connecting a rotary switch and a casing, comprising: a rotary switch, further comprising a base and a rotary disc said base having an annular trench along an outer perimeter and said rotary disc having a plurality of first snap-fit parts along an outer perimeter, said first-snap fit parts being engaged with said annular trench, so that said rotary disc can rotate with respect to said base, with an accommodation space formed between said rotary disc and said base for a signal module that outputs instructions corresponding to a rotation track of said rotary disc; and a casing, engaged with said rotary switch, having a plurality of second snap-fit parts corresponding to snap-fit slots of said rotary disc to form a snap-fit interconnection therebetween, and able to drive said rotary switch to rotate via the interconnection between said second snap-fit parts and said snap-fit slots said second snap fit parts being no thicker than the rotary disc the casing having two main flat surfaces parallel to each other with the rotary switch being mounted against one of said main flat surfaces; wherein said snap-fit slots are disposed along the perimeter of said rotary disc, and some appropriate locations of the perimeter of said rotary disc are concaved inwards to form said snap-fit slots; and wherein the external diameter of said casing is greater than that of said rotary disc said casing has a through-hole, and said second snap-fit parts are disposed at the positions around the perimeter of said through-hole and corresponding to said snap-fit slots.