Calipers

Abstract

The invention relates to measuring tools, provides a linear dimension measuring tool, and particularly discloses calipers.The calipers have an inside caliper state and an outside caliper state and comprise a pair of clamp arms symmetrically arranged and hinged together in a crossing mode through a rotation pin, the side, close to the rotation pin, of each clamp arm is a clamping section, and the other side of each clamp arm is a reading section; a clamp head is arranged at the end of the clamping section of each clamp arm, the included angle between each clamp head and the corresponding clamp arm can be adjusted in the plane defined by the clamp arms, the two clamp heads with sharp front ends are symmetrically arranged, and the calipers are in the inside caliper state when the clamp head incline inwards and in the outside caliper state when the clamp heads incline outwards; a reading device used for reflecting inside caliper length and outside caliper length is further arranged on the reading section of each clamp arm; when the clamp head of each clamp arm inclines inwards to the extreme position, the included angle between the axis of the clamp head and the axis of the corresponding clamping section is 12 degrees; when the clamp head of each clamp arm inclines outwards to the extreme position, the included angle between the axis of the clamp head and the axis of the corresponding clamping section is 25 degrees; the front end of each clamp head is conical.

Description

technical field [0001] This technology relates to measuring tools, and provides a linear dimension measuring tool, especially a caliper, which can be used as an inner caliper when measuring dimensions such as wall thickness, and can be used as an outer caliper when measuring dimensions such as inner hole diameter, and can be used directly Read out the measurement data. Background technique [0002] In the prior art, when measuring linear dimensions such as wall thickness, inner hole diameter, and groove width of parts, inner calipers and outer calipers are often used for auxiliary measurement. After the opening of the calipers corresponds to the size to be measured, the calipers need to be removed. Using other measuring tools to measure the linear dimension of the caliper opening, the test results are affected by the skills of the inspectors, it is difficult to ensure that the caliper opening does not change, and it is also difficult to ensure the accuracy of the measurement...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when measuring linear dimensions such as wall thickness, inner hole diameter, and groove width of parts, inner calipers and outer calipers are often used for auxiliary measurement. After the opening of the calipers corresponds to the size to be measured, the calipers need to be removed. Use other measuring tools to measure the linear dimension of the caliper opening. The test results

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