How to install a tape measure inside?

1, winding tape measure, the main part of which is a circular plastic frame. Seen from the front, the tape measure is wrapped around the frame. There are coils of springs on the back and inside of the plastic frame. One end of the spring piece is bent into a hook and fixed in a small gap of the plastic frame, and the other end is bent into a ring and fixed in a small gap of the ruler box.

2. Repair the tape measure. There is a hollow column with a small crack in the middle of the tape measure box. Put the plastic frame into the ruler box. Align and fix the ring at one end of the spring leaf with the seam of the ruler box. The spring leaf is easy to fall off. If it falls off, it needs to be rewound and stuffed into the plastic frame.

3. Install the small spring. Put the small spring into the hollow column.

4. Stick the plastic frame with small buttons on the ruler box, so that the drawn tape will not retract. When installing, buckle it on the small spring, cover it and the tape measure will be installed.

principle

The tape measure can be rolled up because it has a spring. When measuring the length, the length of the ruler and the spring is actually lengthened. After the measurement is completed, the spring in the tape measure will automatically shrink, and the ruler will also shrink under the action of spring force, so the tape measure will be rolled up.

Tape measure is a common measuring tool in daily life. What we often see is a steel tape measure, which is often used in construction and decoration, and is also one of the necessary tools for families. Divided into fiber tape measure, tape measure, waist measure and so on. Lu Banchi, Feng Shui ruler and secretary also belong to steel tape measure.