Magnetic hook of band tape and its manufacturing method and application

Abstract

The invention relates to magnetism ruler hook for curve ruler. It includes one magnet, one ruler hook body, one horizontal part and one upright part connected with curve ruler tape. The upright part includes front and back surfaces and set one through hole matched with the magnet. Its feature is that it also includes one liner component which has installing hole or groove matched with the magnet and is set in the through hole. The invention also discloses its manufacturing method and application. Compared with the existing technique, its advantages are that one liner component is set between the ruler hook through hole and the magnet; because of its contractility, their interval cam reach optimal aperture to make magnet set more firm, but uneasily fall off.

Description

technical field [0001] The invention relates to the field of tape measure and its manufacture, in particular to a magnetic hook of a tape measure and a manufacturing method thereof, and a tape measure using the magnetic hook. Background technique [0002] A tape measure is a commonly used tool for measuring long distances (generally more than 20 cm). It generally includes a casing and a tape that is coiled in the casing. The head of the tape is bent and is called a hook. , the ruler hook has three functions, one is to prevent the ruler tape from being completely retracted into the casing through the ruler hook being stuck outside the mouth of the ruler box in the rolling state, the second is to facilitate pulling out the ruler tape with the finger hook, and the third is to use it when measuring To hook the measurement start end, so as to realize single-person measurement. However, not all measurement starting ends can be hooked by ruler hooks, such as the measurement starti...

AI Technical Summary

Problems solved by technology

[0007] Nevertheless, these two design schemes still have the following problems: First, whether it is friction fit or press fit, the magnet itself needs to have a certain strength, and for magnets made of powder metallurgy such as NdFeB with strong magnetic , this method is not suitable, and a little carelessness in manufacturing will cause the magnet to break; second, even for a magnet with sufficient strength, due to the limited thickness of the ruler hook, whether it is a friction fit or a press fit , the bonding surface between the magnet and the ruler hook is still very small, and it is very likely that the magnet will fall when encountering a large external force such as collision or backlog during use; third, ensure that the installed magnet is front and rear It is difficult to level the surface with the front and rear surfaces of the ruler hook respectively. Even if it can be done, the processing efficiency is relatively low.

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