| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnifying lens-equipped triangular scale allowing reading of graduations difficult to read by a naked eye heretofore, and capable of more minutely measuring an accurate distance, by installing a magnifying lens to a triangular scale. SOLUTION: This magnifying lens cover-equipped triangular scale is provided with: the nearly triangle pole-like triangular scale having three measurement faces each having upper and lower sides described with the graduations of different scale ratios, each formed with a recessed part parallel to the upper and lower sides in the center; and a nearly V-shaped magnifying lens cover having two projecting parts capable of being inserted in the recessed part of the triangular scale, and two magnifying lenses each having a different magnifying power and a perpendicular part. A rectangular stopper is provided from the upper face to the lower face of the measurement face in one end of one face among the three measurement faces. The triangular scale is provided with a rectangular small stopper in one end of the recessed part of one face among the three measurement faces such that the recessed part is spanned with a bridge, and a protrusion is formed in one end of the projecting part of the magnifying lens cover such that the protrusion is engaged with the stopper provided in the recessed part of the triangular scale. The magnifying lens cover-equipped triangular scale is provided with a nearly V-shaped magnifying lens cover having one projecting part capable of being inserted in the recessed part of the triangular scale, a perpendicular part and an engagement face. The magnifying lens cover-equipped triangular scale shows 1:300, 1:400, 1:500, and 1:600. COPYRIGHT: (C)2006,JPO&NCIPI
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