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发明名称
叶管收紧型推进式粉笔
摘要
本实用新型公开一种叶管收紧型推进式粉笔的结构,采用圆柱形粉笔,插入带有叶管收紧套,滑动推杆结构的空心管中,拧紧收紧套,固定粉笔后使用,可以避免粉尘污染手,同时也防止粉笔折断。
申请公布号
CN2428300Y
申请公布日期
2001.05.02
申请号
CN00207269.6
申请日期
2000.03.27
申请人
刘杨照
发明人
刘杨照
分类号
B43K19/00
主分类号
B43K19/00
代理机构
代理人
主权项
1、叶管收紧型推进式粉笔,由粉笔、空心管组成,其特征在于,上述的粉笔是圆柱形粉笔(1),上述的空心管(3)的上部带收紧夹叶(7),中部带有滑动槽(5),在滑动槽(5)上装一个滑动推杆(4),与空心管(3)上部螺丝(8)接合的收紧套(2)中设有锥形收窄口(12)。
地址
511300广东省增城市荔城镇罗岗石角村前路5号
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