Zero position calibrating device for steel tape

Abstract

The invention relates to the field of metering calibrating devices, especially a zero position calibrating device for a steel tape. The device comprises a substrate, and a side end part in the upper end face of the substrate is vertically provided with a limiting plate which is perpendicular to the substrate. The interior of the end face, located at an inner side of the substrate, of the limiting plate is provided with a tape hook internal size limiting block, a tape hook external size limiting block and a depth measurement tape head limiting block at intervals in a parallel manner, and the tape hook internal size limiting block, the tape hook external size limiting block and the depth measurement tape head limiting block are respectively used for limiting the hook of a steel tape and the body of a depth measurement ruler. The interior of the upper end face of the other side end part of the substrate is fixedly provided with a scale board, and the edge, located at a side of the scale board, of the substrate is provided with a microscope holder. The interior of the microscope holder is movably provided with a reading microscope, and the reading microscope is installed at a corresponding position above the scale board.

Description

technical field [0001] The invention relates to the field of measurement verification devices, in particular to a zero-position verification device for a steel tape measure. Background technique [0002] Steel tape is a common measuring tool in the market. According to different environments, it is also derived into different products such as sounding steel tape. At present, steel tape can only be verified for the scale and measurement range of the tape body during the verification process. There is no A device can verify the zero position of the tape end, so the existing steel tape has certain defects, which will inevitably cause some errors during use. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a steel tape zero verification device with a reasonable structure, which can satisfy the multi-adaptability of the sounding ruler or the steel tape equipped with a ruler hook for the zero pos...

AI Technical Summary

Problems solved by technology

[0002] Steel tape is a common measuring tool in the market. According to different environments, it is also derived into different products such as sounding steel tape. At present, steel tape can only be verified for the scale and measurement range of the tape body during the verification process. There is no A device can verify the zero position of the tape end, so the existing steel tape has certain defects, which will inevitably cause some errors during use

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