Patent ID: 6226873
Filing Date: 2001-05-08
Classification: B26B

Abstract:
A cutter knife comprising:(a) a holder having a plurality of engaging recesses of an isosceles trapezoid shape formed intermittently in its upper face and a slide groove into which a cutter blade is to be inserted movably back and forth; and(b) a leaf spring member supported by a slider to come into and out of engagement with said engaging recesses, wherein said leaf spring member includes leg portions expanded obliquely, a protruding portion of an isosceles trapezoid formed at the center portion of said leg portions and capable of engaging with said engaging recesses, and a wide portion formed at a base of said protruding portion and made wider than said obliquely expanded leg portions;wherein the slider is inserted in the slide groove of said holder and formed to mount said cutter blade thereon and support said leaf spring, the slider comprising a body member, a boss member, and an operation member supported movably on said body member, wherein said operation member includes a movable stopper for engaging with said wide portions of the leaf spring to prevent the protruding portion of said leaf spring from moving backward when the leaf spring deflects, and an engaging groove for pushing downward said protruding portion against the elasticity of said leaf spring by the moving operation of said operation member so that the protruding portion of said leaf spring may be released from said engaging recesses.