Patent ID: 7100285

Claim:
A self-opening handle for a heavy duty artistic knife comprising: a handle which is comprised of a first and a second corresponding halves and each has an elongate groove in front top engaged with each other to define a gap therebetween, a plurality of transverse stop blocks spacedly formed under said elongate grooves, a plurality of longitudinal ribs spacedly formed under said stop blocks to define a sliding space thereinbetween, a horizontal slot in the lower middle portions made in registry with one another and a circular recess in a lower inner wall adjacent rear end of each of said corresponding halves engageable with each other for disposing a magnet therein, wherein said first corresponding half further has a blade chamber in rear portion, a deep small circular depression in an outer surface surrounding said horizontal slot and a lug with an aligned through hole on rear end thereof; said second corresponding half further has a semi-circular depression in an outer surface surrounding said horizontal slot and a projection with a pair of lateral axial rod at rear end rotatably engaged with the aligned through hole of said lug of said first corresponding half; a blade rack slidably disposed in front portion of said handle having a stop plate at rear end engageable with said transverse stop blocks, a striped slider above said stop plate slidably engaged within said elongate grooves and a pair of notches spacedly formed on one side for engaging with a fin on middle top of a trapezoid shape blade; a swivel lock locking a middle portion of side first and second halves having a swivel button engaged with said semi-circular depression and a T-shaped shank centrally projected from inner side of said swivel button and inserted through said horizontal slots.