Mechanical pencil
AssigneeAncos Co., Ltd.
InventorsYasuyuki Hashimoto, Kazuo Shimizu
Life of this patent
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Abstract
A mechanical pencil including a main body divided into first and second members which are rotatable relative to one another. An inner mechanism is provided, primarily in the first member of the body, including a chuck for gripping leads, a chuck tightening member for tightening the chuck disposed around the chuck, a chuck tightening member receiver, and a lead case coupled at a front end portion to the chuck. In a preferred embodiment, a push member is coupled at a front end to the lead case while a spring biases the inner mechanism rearwardly. A mechanism is provided for converting the relative rotation of the first and second members to axial movement of the inner mechanism between retracted and writing positions.
Claims7
A mechanical pencil comprising hollow body means including first and second members interconnected for rotation relative to each other with said first and second members having axial openings at opposite ends of said body means, an axially movable inner mechanism including a lead case, a chuck secured to one end of said lead case adapted to grip a piece of lead, a chuck tightening member movably carried by said chuck for causing said chuck to grip and release a piece of lead and a push member coupled to said lead case and extending outwardly of said opening in said second member, and connecting means for converting relative rotation of said first and second members to axial movement of said inner mechanism to axially move said inner mechanism between a retracted position and a writing position extending through said opening in said first member, said inner mechanism being further axially movable by actuation of said push member when said inner mechanism is in said writing position to incrementally feed a supply of lead.
A mechanical pencil comprising hollow body means including first and second members interconnected for rotation relative to each other with said first and second members having axial openings at opposite ends of said body means, slider means having lead gripping means disposed in said first member adjacent said opening in said first member, a lead case disposed in said body means for axial movement relative thereto, a chuck secured to one end of said lead case adapted to grip a piece of lead, a chuck tightening member movably carried by said chuck for causing said chuck to grip and release a piece of lead, a push member coupled to said lead case and extending outwardly of said opening in said second member and connecting means for converting relative rotation of said first and second members to axial movement of said slider means to axially move said slider means between a retracted position and a writing position extending through said opening in said first member, said lead case and chuck being axially movable by actuation of said push member when said slider means is in said writing position to incrementally feed a supply of lead.
Dependencies are inferred from the claim text.