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    • 5. 发明公开
    • MECHANICAL PENCIL
    • 机械工程师
    • EP2821245A1
    • 2015-01-07
    • EP13755241.0
    • 2013-02-20
    • Mitsubishi Pencil Co., Ltd.
    • IZAWA HirotakeMORIMOTO Daisaku
    • B43K21/00B43K21/16
    • B43K21/16B43K21/00B43K21/006B43K21/06B43K21/22B43K23/008B43K23/02B43K29/00B43K29/02
    • In a rotational drive mechanism employed for a mechanical pencil, a cam structure is simplified, the number of components is reduced, and the rotational drive mechanism is allowed to be easily assembled. A large number of cam faces 24a and 24b are continuously formed in a circle on upper and lower faces which are perpendicular to an axial direction of a rotatable cam 24 which constitutes the rotational drive mechanism 21. Elastic members 23b are formed integrally with a holder member 23 for rotatably supporting the rotatable cam 24 so as to extend in the axial direction, and the first fixed cam and second fixed cam 23c and 23d having a small number of cam faces at butts and tips of the elastic members are arranged to face each other via the upper and lower cam faces 24a and 24b of the rotatable cam 24. It is arranged that the rotatable cam 24 is retreated and moved forward in the axial direction by writing pressure applied to a writing lead so as to be rotationally driven in one direction and rotational motion of the rotatable cam 24 is transmitted to the writing lead.
    • 在用于自动铅笔的旋转驱动机构中,简化了凸轮结构,减少了部件的数量,并且允许旋转驱动机构易于组装。 大量的凸轮面24a和24b在与形成旋转驱动机构21的可旋转凸轮24的轴向垂直的上下表面上连续形成。弹性件23b与保持件 23,用于可旋转地支撑可旋转凸轮24以沿轴向方向延伸,并且在弹性构件的对接和尖端处具有少量凸轮面的第一固定凸轮和第二固定凸轮23c和23d布置成彼此面对 通过可旋转凸轮24的上下凸轮面24a和24b设置旋转凸轮24,通过书写施加到写入引线的压力沿轴向向后移动,以便沿一个方向旋转驱动 并且可旋转凸轮24的旋转运动被传递到写入引线。