Plastic ruler with transparent protection sleeve

Abstract

The invention discloses a plastic ruler with a transparent protection sleeve. The plastic ruler with the transparent protection sleeve comprises a ruler body. Degree scales are printed on the back side of the ruler body. The transparent protection sleeve is arranged outside the ruler body and covers the back side of the ruler body, the front side of the ruler body and the rear side of the ruler body. A groove is formed in the lower end of the front side of the ruler body. The cross section of the ruler body is rectangular when the ruler body is assembled with the transparent protection sleeve. The transparent protection sleeve is detachable. According to the plastic ruler with the transparent protection sleeve, the degree scales on the back side of the ruler can not be worn away easily due to the fact that the transparent protection sleeve is arranged outside the ruler body and covers the back side of the ruler body, the front side of the ruler body and the rear side of the ruler body, and the ruler can not be fractured easily when the ruler falls on the ground; and due to the fact that the transparent protection sleeve is detachable, a new transparent protection sleeve can be used for replacing a broken transparent protection sleeve, and the ruler is enabled to be durable in use.

Description

technical field [0001] The invention relates to a plastic ruler, in particular to a plastic ruler provided with a transparent protective cover, which belongs to the technical field of learning stationery. Background technique [0002] A ruler, also known as a ruler, is a tool used to draw line segments (especially straight ones) and measure lengths. There are usually graduations on the ruler to measure the length. Most of the rulers used now are transparent plastic rulers, and the scale is usually printed on the back of the ruler. During use, the scale is easily worn off, thus affecting the use. The existing plastic rulers still have the problem of not being able to withstand falling. When the ruler is accidentally knocked down and falls to the ground, the ruler will break, thereby affecting its use. Chinese utility model patent "A Kind of Ruler", the application number is 200920197643.4, which discloses a ruler with a layer of anti-wear film on the printed side of the sca...

AI Technical Summary

Problems solved by technology

Most of the rulers used now are transparent plastic rulers, and the scale is usually printed on the back of the ruler. During use, the scale is easily worn off, which affects the use

The existing plastic rulers still have the problem of not being resistant to falling. When the ruler is accidentally knocked down and falls to the ground, the ruler will break, which will affect the use

Chinese utility model patent "A Kind of Ruler", the application number is 200920197643.4, which discloses a ruler with a layer of anti-wear film on the printed side of the scale, which solves the problem that the scale is easily worn off, but after a long time of use, After the anti-wear film is damaged, the scale still needs to be worn off, which will affect the use. This kind of ruler also has the technical problem of not being able to withstand falling

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