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发明名称
自控式自动铅笔
摘要
本发明公开了一种自动出铅的自控铅笔,由于铅芯通过调节弹簧可自动伸缩,不仅使用方便,防止铅芯断裂,还有利于矫正儿童书写姿势的优点。本发明结构简单,零部件少,易于装配,便于推广。
申请公布号
CN1026674C
申请公布日期
1994.11.23
申请号
CN91109880.1
申请日期
1991.10.28
申请人
郑友预
发明人
郑友预
分类号
B43K21/02
主分类号
B43K21/02
代理机构
代理人
主权项
1.一种由按钮(1)垫圈(3)力度调节弹簧(4)力度调节筒(5)连接套(6)铅芯筒(7)笔杆(8)固定环(9)夹持簧(10)夹持器(11)夹持套(12)笔尖(13)及缓冲胶圈(14)所组成的自控式自动铅笔,其特征在于采用了力度调节螺母(2)、用以控制力度调节弹簧(4)的压力,从而改变铅芯的伸缩力;当力度调节螺母(2)左旋,则力度调节弹簧(4)的压力增加,致使铅芯的伸缩力变大,反之则力度调节弹簧(4)的压力减小,致使铅芯的伸缩力变小。
地址
630013四川省重庆市中区双钢路一号
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