On the working principle of a tape measure

The tape measure has been working for a long time. Many customers have been asking about it. Actually, it’s very simple. The tape measure is a common measure tool in daily life. What you often see is steel tape, which is commonly used in architecture and decoration, and is also one of the essential tools for families. It is divided into a fiber tape, a tape measure, a waist scale and so on. Lu Ban Chi, Feng Shui ruler, Wen Gong ruler is also a steel tape measure. First, the principle tape can be rolled up because the tape is equipped with a spring, when pulling out the length of the measurement, it is the length of the length of the length and the spring. Once the measurement is finished, the spring in the tape will shrink automatically, and the ruler will shrink under the effect of the spring force, so the tape will roll up. Two. Feature 1. The tape is too big to fail. Why do not fail; the tape in the tape is very long, it is completely relaxed to a fully tight interval, the full length of the scale of the scale includes the length of the two, so the tape will not fail. Two, pulling a meter long and pulling two meters long, pulling force is no difference; the tape is very thin, and the amount of deformation is very small, so the reaction is very small, and the change of force can not be felt when the ruler is drawn. Three, the main type of the classification tape is the steel tape, the second is the fiber tape, which is the ruler you often see, many people say it is the cloth ruler, and the waist scale (the tailor ruler / measuring ruler belongs to this kind). In the southern and Hongkong regions of China, it is usually called tape tape or ruler. Its material is PVC plastic and glass fiber, and glass fiber can prevent stretching during the use of tape. Tape measure is usually made in English and English. It is 150 centimeters on one side and 60 inches on the other side. Inches are commonly used units of measurement abroad, and the size of TV sets and monitors is inches. And the size of the jeans, too. In China, the size of the measuring tape is commonly used in the city. One side is 150 centimeters, and the other is 45. Often say 2 feet 1, 2 feet 2 waist, is the unit of the market.