发明授权
- 专利标题： Focusing screen interchanging device in single lens reflex camera
- 专利标题（中）： 聚焦屏交换设备在单镜头反光相机
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申请号： US230272申请日： 1981-01-30
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公开(公告)号： US4346973A公开(公告)日： 1982-08-31
- 发明人: Makoto Katsuma , Masayuki Suzuki , Kenichi Shinbori , Hiroyasu Murakami
- 申请人： Makoto Katsuma , Masayuki Suzuki , Kenichi Shinbori , Hiroyasu Murakami
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX55-12929 19800131; JPX55-93006 19800708; JPX55-93712 19800709
- 主分类号： G03B13/24
- IPC分类号： G03B13/24 ; G03B13/28 ; G03B19/12 ; G03B13/00
摘要：
In a single lens reflex camera a focusing screen is removably attached with a focusing screen fitting member unitarily formed therewith for fitting the focusing screen in the camera body with a spring being provided therebetween to form a focusing screen unit. The focusing screen fitting member is provided with a clamp holder portion for engagement with an interchanging tool for use in attaching and detaching the focusing screen unit to and from the camera body, whereby the interchanging operation of the focusing screen may be performed with ease and safety.
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