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发明名称
C型电动卷片器
摘要
本实用新型C型电动卷片器是一种投影教具,由框形托板、卷轴支架,电池盒、小电机驱动的减速传动机构、换向开关、卷轴投影片等部件组成,可正反向卷动投影片,进行静止画面演示或运动画面演示。其工作原理,将电动卷片器框形托板平置于投影器玻面上,安好卷轴投影片,用换向开关控制小电机驱动的减速传动机构,使之运转、停止、换向,并带动传动皮带使卷轴卷动投影片,达到移换投影内容的目的。
申请公布号
CN2088260U
申请公布日期
1991.11.06
申请号
CN90218457.1
申请日期
1990.08.29
申请人
畅荣尊
发明人
畅荣尊
分类号
G03B23/14
主分类号
G03B23/14
代理机构
代理人
主权项
1、一种与光学投影仪配合使用的可换向的电动卷片器,其特征是:有一个与投影仪玻面面积相近的框形托扳1,托扳上有卷轴支架2,减速传动机构3,小电机4,导片杆5,电池盒6,导线7,换向开关8,卷轴9,卷轴投影片10,传动皮带13等部件的组合,该组合可以实现教学内容的静止画面投影演示,也可以实现教学内容的运动画面投影演示。
地址
100080北京市万泉河中学
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