Mechanical pencil

Claim 1

In a push type mechanical pencil comprising an outer casing; an inner casing having at its fore end a lead gripping chuck means and also formed with a lead passage communicated with said chuck means and a spare leads housing tube communicated with said lead passage; and a spring means adapted to press said inner casing rearwardly along its axis, wherein said push type mechanical pencil further comprises a fore larger hole and a rear smaller hole both formed in alignment through said outer casing and defined by a bridge formed integral with said outer casing, said fore larger hole being formed at a place where a user''s fingertip is positioned when the user grasps said outer casing, an elastic push plate adapted to normally lie covering said holes along the external surface of said outer casing, said push plate being bent in L-shape at its rear end portion and tailed in said rear smaller hole such that said push plate is bendable about said bridge, said push plate having side walls suspending from both sides of its fore end portion and extending into the inside of said outer casing, and an engaging member secured to said inner casing at the rear part of said spring and having a tapered surface formed at the rear portion thereof on which the fore edges of said side walls of said push member acts, whereby when the user pushes said push plate downwardly toward the inner casing, the fore edges of said push plate push said engaging member to move forwardly against the resisting force of said spring, thereby pushing out the lead into a writing position.