发明名称 |
Ballpoint pen tip and ballpoint pen using the same |
摘要 |
The present invention relates to a ballpoint pen tip 1 and also a ballpoint pen 7 or 8 using the same. A ballpoint pen tip 1, according to the invention, rotatably holds a ball 5 at its front end portion. The ball 5 is held by a plurality of inwardly projecting portions 3 (as a ball receiving seat) and a front end edge portion 4. The projecting portion 3 are formed by inwardly pressing and deforming a neighborhood of a front end portion of a metallic pipe body 2. The front end edge portion 4 is formed by inwardly pressing and deforming the front end portion of the pipe body 2. In the ballpoint pen tip according to the present invention, a relation of A/T >5.8 is satisfied, where A is an outer diameter of the ball 5 and T is a thickness of the pipe body 2.
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申请公布号 |
US2001046408(A1) |
申请公布日期 |
2001.11.29 |
申请号 |
US20010842647 |
申请日期 |
2001.04.27 |
申请人 |
ABE HIROYASU;MAKI MASAHISA |
发明人 |
ABE HIROYASU;MAKI MASAHISA |
分类号 |
B43K1/08;(IPC1-7):B43K7/10;B43K7/00;B43K7/03 |
主分类号 |
B43K1/08 |
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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