发明名称 |
Lead holding structure of mechanical pencil |
摘要 |
A lead holding structure of a mechanical pencil where a predetermined lead holding force is maintained so that a lead does not move even if a writing pressure is repeatedly applied to the lead and where a so-called biting-off of a lead (break) is prevented without damaging the lead in repeatedly sending forward and backward operations.
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申请公布号 |
US7452148(B2) |
申请公布日期 |
2008.11.18 |
申请号 |
US20040597774 |
申请日期 |
2004.03.10 |
申请人 |
MITSUBISHI PENCIL CO., LTD. |
发明人 |
FUKUMOTO TAKEO;NAKAYAMA KYO;SUZUKI HITOSHI |
分类号 |
B43K21/22;B43K21/16 |
主分类号 |
B43K21/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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