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发明名称
活动式铅笔
摘要
本实用新型涉及一种活动式铅笔,由笔杆,铅芯进给螺旋钢丝,铅芯座及椎形导向头组成。与现有技术相比,具有铅芯伸缩自如,进给无限,制作成本低等优点。
申请公布号
CN2153465Y
申请公布日期
1994.01.19
申请号
CN92220853.0
申请日期
1992.09.26
申请人
张立彬
发明人
张立彬
分类号
B43K21/08
主分类号
B43K21/08
代理机构
代理人
主权项
1、一种活动式铅笔,由笔杆、铅蕊等组成,其特征在于笔杆2内设有一铅蕊进给螺旋钢丝4、S型铅蕊座3套在螺旋钢丝4的螺圈内,螺旋进给钢丝4由插入笔杆端的锥形蕊导向头5的内腔承托。
地址
浙江省杭州市华家池浙江农业大学农工系
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