Patent ID: 6575285
Filing Date: 2003-06-10
Classification: B27B,H01H,Y10S

Abstract:
A safety switch for a power tool, comprising:a casing having a slot defined therethrough and a safety member slidably engaged with said slot, a lug extending from an underside of said safety member, a trigger pivotally located in said casing and having a protrusion which is interfered by said lug of said safety member, a spring having one end thereof connected to said safety member and the other end of said spring connected to a stop member in said casing, a link having an end thereof connected to said safety member; a gear received in said casing and adapted connected to a power source, said gear independently mounted to an output shaft and a plurality of engaging recess defined in said gear, a plurality of guide rods and guide members respectively extending from an inside of said casing; a clutch member mounted to said output shaft and having a plurality of blades each of which has a guide slot in which respective one of said a plurality of guide rods extends, each blade having a tapered extension extending therefrom which is able to be movable along said guide member, an engaging member movably mounted to said output shaft and having bosses extending from a side thereof, a cover fixed on said clutch member and said engaging member being retained in a central hole in said clutch member by said cover; one of said blades having a plate connected thereto and said plate having an L-shaped slot, the other end of said link engaged with said L-shaped slot in said plate, another spring having one end thereof connected to said plate and the other end of said another spring fixed to one of said plurality of guide rods in said casing, and a lever pivotally connected to said casing and an extension connected to said lever, said extension having a first elongate slot and a second elongate slot, two pins extending from said inside of said casing and located in said first elongate slot, a position rod extending from said plate and movably engaged with said second elongate slot.