MECHANICAL PENCIL
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United States of America Patent
Stats
-
Sep 28, 2010
Grant Date -
Oct 7, 2010
app pub date -
Oct 15, 2008
filing date -
Nov 26, 2007
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. An indicator (6c) of a wedge-shaped notch is formed at a part of the rotor. The indicator can be observed through the body cylinder made of a transparent material. By this structure, a mechanical pencil is provided in which operation of the writing lead that is gradually rotated by way of writing pressure can be known certainly.
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Cited Art Landscape
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