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4. 发明专利

DE3870973D1 未知
公开(公告)号：DE3870973D1
公开(公告)日：1992-06-17
申请号：DE3870973
申请日：1988-03-29
申请人： KOTOBUKI & CO LTD
发明人： KAGEYAMA LTD , MITSUYA LTD , NAKAZATO LTD
IPC分类号： B43K21/033
摘要： A mechanical pencil in which lead feed is done automatically upon release of writing of a slider (3) from the paper surface or the like and the slider can be locked in a retreated position when the pencil is not in us, and the mechanical pencil including a tip member (2) fitted in the front end of a shell removably, a sleeve (4) disposed slidably in the interior of said tip member, a lead feed mechanism (5) 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 (10) 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 (35) capable of engaging said tip member disengageably, the slider imparting a predetermined frictional force to the lead, and a resilient member (11) 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 a given state.

5. 发明专利

DE3770372D1 未知
公开(公告)号：DE3770372D1
公开(公告)日：1991-07-04
申请号：DE3770372
申请日：1987-08-28
申请人： KOTOBUKI & CO LTD
发明人： KAGEYAMA LTD , MITSUYA LTD , KOBAYASHI LTD
IPC分类号： B43K21/00
摘要： A lead cartridge has an opening and closing unit in which outward engaging portions (88, 89) are provided on a chuck type opening and closing mechanism which is divided into sections which have an inward elastic force and which is disposed on the lead cartridge. The outward engaging piece portions can move inwards against the inward elastic force along the diametrical direction thereof to open lead conducting holes when the cartridge is inserted into and engaged with a lead guide, whilst the outward engaging piece portions are restored by means of elastic force to move outwardly to close the lead conducting holes. When the outward engaging piece portions move inwards so that the lead conducting holes are opened, and on the other hand when the outward engaging piece portions are drawn out from the lead guide, these outward engaging piece portions are restored outwards by means of the elastic force so that the lead conducting holes are closed.

6. 发明专利

DE3668140D1 未知
公开(公告)号：DE3668140D1
公开(公告)日：1990-02-15
申请号：DE3668140
申请日：1986-08-19
申请人： KOTOBUKI & CO LTD
发明人： KAGEYAMA LTD , MITSUYA LTD
IPC分类号： B43K21/033 , B43K21/02
摘要： A mechanical pencil having a lead pipe (33), a bottom bearer (34), a frame (45), a pushing member (39), a sleeve (37), a lead chuck (36), etc. … A slider (46) includes adjacent the top thereof an external engaging portion for engaging with the inside of part of the bottom member (32), and is pre-set so that the top of the slider is separated at a prescribed distance from the pushing member.

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