Mechanical pencil
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United States of America Patent
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-
Oct 31, 2006
Grant Date -
Dec 9, 2004
app pub date -
Sep 24, 2002
filing date -
Sep 28, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a mechanical pencil, the dispersion range of the diameter of a lead is allowable to a certain extent, but if by chance a lead having the maximum diameter is used the lead may not be delivered. This is because there is exceeded the allowable range of the elastic deformation of an elastic thin film, namely, a lead holding member. The mechanical pencil includes the lead holding member disposed in the neighborhood of the tip of a shaft tube, in which the exterior shape of the lead holding member is formed to be slightly smaller than the interior shape of the shaft tube in which the lead holding member is disposed, and an inner step portion for preventing the dropping of the lead holding member from the shaft tube is disposed in the front portion of the lead holding member.
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