Retractable ruler
A technology of rulers and short rulers, applied in the direction of rulers for direct reading, can solve problems such as inability to shrink and stretch, insufficient range, and no storage space for pencil cases, etc., to achieve the effect of easy use and storage
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[0014] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.
[0015] Such as figure 1 As shown, a retractable ruler includes a ruler body with a scale. The ruler body is composed of at least two short rulers nested with each other. The ruler body is coated with a fluorescent layer. The short ruler includes a storage short ruler 1 and a stored short ruler 2. The short ruler 1 is provided with a cavity for receiving the short ruler 2, and the short rulers are connected by an anti-falling structure 3. The anti-falling structure is a tenon, and the end of the short ruler 2 is provided with a protrusion 4 for easy stretching.
[0016] The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the prese...
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