Automatic mechanical light-changing face mask

Abstract

The invention discloses an automatic mechanical light-changing face mask. In order to prevent sight line of a welder from being blocked by a filter glass on the face mask and to enable the welder to clearly see welded positions even in a poor-light environment, the face mask adopts the following technical measures: a photoelectric sensor and an electromagnet are arranged on the face mask, and a viewing window is formed in the face mask; a filter glass controller is connected to the photoelectric sensor; the filter glass controller is connected to and in charge of controlling the electromagnet; the filter glass is movably arranged on the viewing window; and the filter glass is connected to the electromagnet and the filter glass, under the control of the electromagnet, is in charge of opening and closing the viewing window. In comparison with the prior art, the light-changing face mask provided by the invention, which controls the filter glass in a mechanical mode, can move the filter glass away from the viewing window before welding work of the welder (before arcing) when it is not required to protect eyes. At that time, sight line of the welder's eyes is not attenuated by the filter glass and the viewing window is completely transparent, so that influence to viewing field and work of the welder is completely prevented; and shortcoming of the prior art that normal light is attenuated by an electric welding face mask is overcome.

Description

technical field [0001] The invention belongs to a technical field of labor protection, especially eye protection. Background technique [0002] No matter which kind of electric welding will produce a strong arc, this arc will seriously damage the welder's eyes. People have come up with multiple ways to protect eyes in electric welding work for this reason. Among these methods, the most used is to add a filter lens on the mask or to install a transparency controllable liquid crystal screen on the basis of the infrared and ultraviolet filter lenses, making it an automatic dimming mask. These two masks have different usage methods. The former should be removed after the arc is broken, otherwise, the welder cannot see anything because the transparency of the filter lens is too low, and the welder cannot work at all. Although the latter can automatically restore a certain degree of transparency after the arc is broken, it is not necessary to remove it, but because the restored ...

AI Technical Summary

Problems solved by technology

Working in these places, even if you don’t wear a mask, it’s not easy to see the weldments around you. If the attenuation of light by the lens is added, the welder will basically be unable to work.

The fact is that no matter what kind of mask is used in the prior art, it will affect the welder's line of sight. This is due to the nature of the filter lens or liquid crystal screen, which cannot be avoided by themselves, which is also the deficiency of the prior art in this respect.

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