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    • 8. 发明授权
    • Mechanical pencil capable of automatically propelling successive lengths
of lead
    • 能够自动推进连续长度铅的机械铅笔
    • US4840508A
    • 1989-06-20
    • US87863
    • 1987-08-21
    • Hiroyuki Watanabe
    • Hiroyuki Watanabe
    • B43K21/027B43K21/033
    • B43K21/027B43K21/033
    • A mechanical pencil has a body with a lead storage chamber defined therein for housing spare lengths of lead, and a tubular lead guide receiving a length of lead and coaxially mounted in the body so as to partly protrude outwardly from its writing end. During writing or marking, the lead guide gradually retracts into the body against the force of a return spring with the wear of the lead received therein and, when the pencil is moved off the writing surface, it is held in place by a locking mechanism until a preselected wear point is reached, then it is sprung back to its normal position. Disposed intermediate the lead storage chamber and the lead guide, a chuck coacts with an internally tapered socket for gripping the lead against displacement away from the writing end of the body. A chuck opener member is coupled to the lead guide in order to hold the chuck open when the lead guide is in the normal position, in order to assure the uninterrupted delivery of the successive lengths of lead from the lead storage chamber into the lead guide.
    • 一种自动铅笔具有限定在其中的引线存储室的主体,用于容纳备用长度的引线,以及管状引线引导件,其容纳一段长度的引线并同轴地安装在本体中,以便从其写入端部向外突出。 在书写或标记期间,引导引导件随着接收在其中的引线的磨损而逐渐退回到本体中,并且当铅笔从书写表面移开时,其通过锁定机构保持就位,直到 达到预先选择的磨损点,然后将其弹回到其正常位置。 在铅储存室和引导引导件之间设置一个卡盘,与内锥形插座共同作用,用于夹紧引线,使其远离本体的书写端。 卡盘开启器构件联接到引导引导件,以便当引导引导件处于正常位置时保持卡盘打开,以便确保连续长度的引线从引线存储室不间断地传递到引导引导件中。