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US 4,603,991 AGranted
Connector for propelling pencil
AssigneeKotobuki & Co., Ltd.
InventorKen Yamamoto
Life of this patent
Estimating the term…
Abstract
A propelling pencil comprising an outer cylinder made of synthetic resin which can be easily molded as a unitary structure and an engaging member incorporating a chuck device including a lead propelling mechanism, the engaging member being detachably inserted into the outer cylinder from the rear side thereof, and thereby providing excellent appearance and light-touching operation.
Claims2
A mechanical pencil comprising:
- an outer cylinder (1) of a unitary cylindrical synthetic resin-molded structure having at least one engaging hole (1b) formed in the wall of the front portion thereof and a form suitable for being gripped between a user's fingers;
- a lead pipe (3) slidably contained within the outer cylinder (1);
- a lead chuck (4) fixed to the extremity of the lead pipe (3);
- a chuck fastening tube (5) movably fitted on the head of the lead chuck (4);
- an engaging member (2) adapted to abut the rear end of the chuck fastening tube (5) to restrict the movement of the chuck fastening tube (5);
- and
- a spring disposed resiliently between an inner flange (2a) formed in the extremity of the engaging member (2) and the lead pipe (3);
- wherein
- at least one protrusion (2b) for engaging the engaging hole (1b) is formed in the periphery of the rear portion of the engaging member (2).
6 more elements
Dependencies are inferred from the claim text.