发明授权
- 专利标题: Mechanical pencil
- 专利标题(中): 自动铅笔
-
申请号: US171881申请日: 1988-03-22
-
公开(公告)号: US4884910A公开(公告)日: 1989-12-05
- 发明人: Hidehei Kageyama , Yoshihide Mitsuya , Yoichi Nakazato
- 申请人: Hidehei Kageyama , Yoshihide Mitsuya , Yoichi Nakazato
- 申请人地址: JPX Kyoto
- 专利权人: Kotobuki & Co., Ltd.
- 当前专利权人: Kotobuki & Co., Ltd.
- 当前专利权人地址: JPX Kyoto
- 优先权: JPX62-94905 19870417; JPX62-67101 19870502; JPX62-67102 19870502; JPX62-67103 19870502; JPX62-155777 19870623; JPX62-145438 19870925
- 主分类号: B43K21/033
- IPC分类号: B43K21/033 ; B43K21/02
摘要:
A mechanical pencil is disclosed in which lead feed occurs automatically upon lifting of the pencil from the paper surface or the like and in which the slider can be locked in a retreated position when the pencil is not in us. The mechanical pencil includes a tip member fitted in the front end of a shell removably, a sleeve disposed slidably in the interior of the tip member, a lead feed mechanism which is mounted in the interior of the sleeve and which permits a forward movement of a lead but inhibits a backward movement of the lead, an ejection bar mounted on the front end side of the sleeve, with the lead extending through the ejection bar, a slider disposed slidably within the tip member and having a locking engaging portion capable of engaging the tip member disengageably, the slider imparting a predetermined frictional force to the lead, and a resilient member disposed between the slider and the ejection bar, the resilient member having an urging force stronger than a lead gripping force of the lead feed mechanism under.
公开/授权文献
- US4374309A Machine control device 公开/授权日:1983-02-15