发明名称 |
Input protecting mechanism for measuring device. |
摘要 |
<p>Herein disclosed is an input protecting mechanism for a measuring device, which can prevent an internal circuit irrespective of the selected state of a measurement range from being damaged by an erroneous input caused by an erroneous insertion of the plug of a test lead. The measuring device comprises: a function select switch for selecting measurement functions; a plurality of input terminals for receiving the plug of a test lead selectively in accordance with the measurement function selected; and a shutter made movable in accordance with the select range of the function select switch for opening or closing a predetermined one of the input terminals. The shutter includes: an actuate portion adapted to be actuated from the outside; contacts for opening or closing at least the predetermined one of the input terminals in accordance with the actuation of the actuate portion; and an engage portion adapted to engage with a portion of the function select switch, when the predetermined input terminal is opened, to regulate the select range of the function select switch, and to engage with a portion of the function select switch, when the predetermined input terminal is closed, to regulate the movement of the shutter.</p> |
申请公布号 |
EP0507126(A2) |
申请公布日期 |
1992.10.07 |
申请号 |
EP19920104227 |
申请日期 |
1992.03.11 |
申请人 |
YOKOGAWA INSTRUMENTS CORPORATION |
发明人 |
NAKAZAWA, TOSIO;KITAJIMA, AKIHIKO |
分类号 |
G01R15/08;G01R1/36;G01R15/12;G01R19/00 |
主分类号 |
G01R15/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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