| 摘要 |
In the present invention are disclosed a step type ratchet wheel mechanism and a turning switch with step type ratchet wheel mechanism, wherein comprising: camshaft circular disc, on its end surface is disposed at least one groove, on its rim is disposed at least one positioning slot; driving cam, on its end surface is disposed at least one groove, on its rim is disposed at least one angular shape tooth; first pawl and second pawl; one resilient element is contained in the chamber, which is formed from two corresponding grooves respectively disposed on the end surfaces of camshaft circular disc and driving cam. When said camshaft circular disc is at a control-position, first pawl falls into one positioning slot of camshaft circular disc; when said driving cam is being turned toward next control-position, said two grooves will be staggered, said resilient element is compressed; when said driving cam is turned to the next control-position, one angular shape tooth will push first pawl out from said positioning slot, the released resilient element will cause said camshaft circular disc turning to the next control-position, and then second pawl will fall into another positioning slot of camshaft circular disc. In use of the present invention, the acted force is even, the operation is steady, the hand handle is comfortable, and furthermore, the phenomenon of hung-up point between two adjacent control-positions also may be avoided.
|
