The tape measure can be rolled up because there is a spring ruler in the tape measure. When the tape measure is not used, the ruler is curled up in the ruler shell due to the contraction force of the spring. When we use a tape measure, we pull the ruler out, and the ruler is pulled out to a suitable length, and then we start measuring. Once the measurement is completed, the spring in the tape measure will automatically shrink, and the ruler will also shrink under the action of the spring force, and then the ruler will roll into the ruler shell.
2. What are the types of tape measures?
The main type of tape measure is steel tape measure, which is often used in construction and decoration, and is also one of the necessary tools for families. Lu Banchi, Feng Shui ruler and secretary also belong to steel tape measure.
Followed by fiber tape measure, which is often seen by everyone, many people say it is cloth quantity. There are also waist measurements (tailor's measurements/clothing measurements belong to this category). In southern China and Hongkong, the tape measure is usually called a soft ruler or a ruler. Its material is PVC plastic and glass fiber, which can prevent the tape measure from being elongated during use.
Tape measure is made of glass fiber and PVC plastic, also known as fiber tape measure or soft ruler. Generally, it is metric, that is, 150 cm on one side and 60 inches on the other. Inch is a commonly used unit of measurement abroad, and the size unit of TV and monitor is inch. Jeans are also measured in inches. In China, tape measures are often used in cities. One side is 150 cm and the other side is 45 inches. It is often said that 2 feet 1, 2 feet 2 waist, is the unit of city inch.
Gift rulers are used for advertising and promotion. Divided into steel tape measure (steel tape measure) and leather tape measure (PVC plastic fiber tape measure), usually cute and small.