Introduction

   A kind of universal level bubble with internal printing scale mark

  technical field

  The utility model relates to a universal level bubble, in particular to a universal level bubble with an internal scale mark.

  Background technology

  Level bubble is a kind of instrument used to measure whether the plane is level or not. The scale marks of the existing universal level bubble are printed on the outside of the glass cover plate. Because of the thickness of the glass cover plate itself, there will be certain visual error when people observe, which will have a certain impact on the test results. At the same time, because the scale marks are exposed on the outside, they will fall off in the high salt fog area for a long time Fall, thus affecting judgment.

  Content of utility model

  The purpose of the utility model is to provide a universal leveling bubble with an internal printing scale mark, so as to solve the problems raised in the background technology.

  To achieve the above purpose, the utility model provides the following technical scheme:

  The utility model relates to a universal level bubble with an internal scale mark, which comprises a level bubble body, a glass cover plate, an outer side of the glass cover plate and an inner side of the glass cover plate; the upper and lower sides of the glass cover plate matched with the level bubble body are respectively the outer side of the glass cover plate and the inner side of the glass cover plate; the inner side of the glass cover plate is printed with a scale mark.

  As a further scheme of the utility model, the scale mark on the inner side of the glass cover plate is printed by the laser marking repair method.

  Compared with the prior art, the utility model has the beneficial effect of printing the scale mark on the inner side of the glass cover plate, thereby not only reducing the observation accuracy error, but also preventing the scale mark from falling off. The scale mark of the universal level bubble of the glass cover plate is generally printed with high temperature glass ink. The high temperature of the glass cover plate may cause deformation, which may affect the judgment results. At the same time, the stress of the universal level bubble will change after high temperature printing, resulting in a great discount in the durability of the scale mark, thus affecting the service life.