Steel Shield

Description

SHEFFIELD/Steel Shield-3m tape measure 3 meters-(S077003)/1 piece

• The ruler shell is made of ABS material, which is impact-resistant .
• Strong spring ensures smooth extension and retraction of the ruler.
• With strong belt buckle.

Steel Shield Tape 3m

The main types of measuring tapes are steel measuring tapes, followed by fiber measuring tapes, which are the tape measures that we often see. Many people call them cloth measuring tapes, and waist measuring tapes (tailor’s measuring tapes/clothing measuring tapes belong to this category). In southern my country and Hong Kong, measuring tapes are usually called soft measuring tapes or stretch measuring tapes. They are made of PVC plastic and glass fiber, and the glass fiber can prevent the measuring tape from being stretched during use.

The tape measure can be rolled up because there is a spring inside the tape measure. When you pull it out to measure the length, you actually lengthen the ruler and the spring. Once the measurement is completed, the spring inside the tape measure will automatically shrink, and the ruler will also shrink under the action of the spring force, so the tape measure will roll up.

First, the tape measure will not fail if it deforms too much. Why it does not fail: The spring in the tape measure is very long, and its range from fully relaxed to fully tightened is very large, including the entire travel of the tape measure, leaving margin at both ends, so the tape measure will not fail.

Second, there is no difference in pulling force between pulling it to one meter and pulling it to two meters. The spring of the tape measure is very thin, and the amount of deformation when tightened is also very small, so the reaction force is very small, and you cannot feel the change in force when pulling the tape.

The “inner core” of the tape measure has a small piece of steel inside, which acts like a spring. You can also think of it this way, like the small steel wire on the trigger of a toy gun, which is used to “hit” the bullet. When it is pulled out, it is bent by force. After it is released, the external force (the force of the hand pulling, and the friction force is smaller, smaller than the elastic force of the small steel wire) disappears, so it automatically bounces back. The folded part at the front of the tape measure comes into play at this time, making the tape measure stuck outside so that it will not be completely retracted. It is loose at the beginning, and it becomes tight after it is pulled out. After letting go, it should have a recovery process, so it will automatically bounce back. That is, it is loose inside at the beginning, and it becomes tight when it is pulled. There is an elastic force in between, and it will naturally bounce back when it is released.