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发明名称
防作弊视力表
摘要
一种防作弊视力表,包括基框、E字块、转轴、齿轮及同步带,其特征在于所述的齿轮由棘轮机构带动。所述的E字块中心点背面连接着转轴,转轴上套有齿轮,所述的同一排E字块转轴上套的齿轮由同步带连成一体,所述的棘轮机构包括带八个等距轮齿的棘轮、回旋弹簧、拔动杆及固定在基框上的定位片。本实用新型能准确便捷地调节E字块的开口方向,防止被测者通过记忆取得虚假视力值,使得测试结果更科学、准确。
申请公布号
CN203408028U
申请公布日期
2014.01.29
申请号
CN201320304483.5
申请日期
2013.05.13
申请人
吴善锁
发明人
吴善锁
分类号
A61B3/032(2006.01)I
主分类号
A61B3/032(2006.01)I
代理机构
代理人
主权项
一种防作弊视力表,包括基框、E字块、转轴、齿轮及同步带,其特征在于所述的齿轮由棘轮机构带动,所述的E字块中心点背面连接着转轴,转轴上套有齿轮,同一排E字块转轴上套的齿轮规格型号相同,并由同步带连成一体,所述的棘轮机构设在最靠近基框右侧的E字块转轴上。
地址
317102 浙江省三门县高枧乡陈岙村23号
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