MECHANICAL PENCIL HAVING LEAD-ROTATING MECHANISM
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United States of America Patent
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N/A
Issued Date -
Jan 29, 2015
app pub date -
Dec 26, 2013
filing date -
Jul 25, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A mechanical pencil has a main body inserted into a tubular main body cover to undergo forward and rearward movement and rotational movement within the main body cover. The main body feeds a lead and holds the lead during writing. A gear mechanism incrementally rotates the main body based on the presence or absence of writing pressure occurring during writing to thereby incrementally rotate the lead. Protection collars are rotatably mounted on the outer periphery of the main body at locations where the main body is exposed from the main body cover. The protection collars rotatably idle on the main body to prevent a person from gripping and rotating the main body thereby preventing damage to the gear mechanism.
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Family
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Cited Art Landscape
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