CN106923963A - Automatic Mechanical Darkening Mask - Google Patents

Abstract

The invention discloses an automatic mechanical light-changing mask, which adopts the following technical measures in order to prevent a filter lens on the mask from obstructing the sight of a welder and enable the welder to see the welding position clearly in an environment with insufficient light: a photoelectric sensor, an electromagnet and a window are arranged on the face mask, the photoelectric sensor is connected with a filter lens controller, and the filter lens controller is connected with and controls the electromagnet; the filtering lens is movably arranged on the window, is connected with the electromagnet and controls the opening and closing of the window by the filtering lens; the invention is different from the prior art in the following places: it uses mechanical method to control the filter lens, and the filter lens is moved away from the window when the welder does not need to protect eyes before welding (before starting arc). At this time, the light rays reaching the eyes of the welder are not attenuated by the filter lens, the window is completely transparent, no influence is caused on the vision field and the work of the welder, and the defect that the normal light rays of the welding mask in the prior art are attenuated is overcome.

Description

Automatic Mechanical Darkening Mask

technical field

The invention belongs to a technical field of labor protection, especially eye protection.

Background technique

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 transparency is not high, and due to various reasons of the filter lens and the LCD screen, the image seen by the welder is seriously cast. . All of these will seriously affect the welder's daily work, especially in places with insufficient light. This effect prevents the welding work from proceeding normally and is unacceptable.

The reason for the above situation is that filter lenses and/or LCD screens are fixedly installed on the electric welding goggles in the current technology. These things have different degrees of attenuation to the transmission of light, and these attenuations are not full-spectrum. Therefore, any object seen through it is dark and color cast, and the color cast image will also cause inconvenience to welders. On the other hand, welders often perform welding work on the back, bottom of the machine, or in areas with insufficient lighting. Working in these places, even if you don’t wear a mask, it is 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 which kind of face shield is used in the prior art, it will affect the welder's sight, which is due to the nature of the filter lens or liquid crystal screen, which cannot be avoided by itself, and this is also the deficiency of the prior art in this respect.

Contents of the invention

In order not to let the filter lens on the mask or the liquid crystal screen attenuate the normal light (the light when the arc is not started) to hinder the welder's sight, so that the welder can still see the welding position clearly in the environment with insufficient light, the present invention adopts the following Technical measures: install photoelectric sensors, electromagnets and windows on the mask, the photoelectric sensors are connected to the filter lens controller, and the filter lens controller is connected to and control the electromagnet; the filter lenses are movably installed on the windows, and the filter lenses are connected The electromagnet controls the opening and closing of the filter lens to the window by the electromagnet.

The difference between the present invention and the prior art is that it adopts a mechanical method to control the filter lens, and the filter lens moves away from the window when the welder does not need to protect his eyes before welding (before arcing). At this time, the filter lens does not attenuate the light reaching the welder's eyes, and the window is completely transparent, which does not have the slightest impact on the welder's vision and work, which overcomes the deficiency of the welding mask in the prior art attenuating normal light. When the welding work is carried out, when the photoelectric detector detects the arc light, the filter lens is driven by the filter lens controller and the electromagnet at once, and the window is blocked by the filter lens. The whole process is a bit like the mechanical shutter of a camera. The strong arc light can enter the welder's eyes after being filtered by the filter mirror, so that the arc light cannot harm the welder.

Description of drawings

Fig. 1 is a structural schematic diagram of a mechanical dimming mask when the filter lens is opened.

Fig. 2 is a structural schematic diagram of the mechanical dimming mask when the filter lens is closed.

Among the figure: connecting rod 1, connecting rod hinge shaft 2, filter lens hinge shaft 3, filter lens 4, window 5, electromagnet 6, return spring 7.

detailed description

The "movably installing the filter lens on the window" described in the application refers to all installation methods that can make the filter lens movably block the window except that the filter lens is fixedly installed on the window of the mask. There are a variety of installation methods that can realize this function, such as hinged, push-pull movement, etc., which are all suitable for the use of the present invention, and can produce the technical effects of the present application at the same time.

In the "filter lens is connected to the electromagnet and the electromagnet controls the opening and closing of the filter lens to the window" described in this application, there are various connection methods between the filter lens and the electromagnet, such as connecting rod connection, wiring connection These connection methods can realize the opening and closing of the window by the electromagnet control filter lens, are all suitable for the use of this program, and can obtain the same technical effect.

The structure of the present invention is: photoelectric sensors, electromagnets and windows are installed on the mask, the photoelectric sensors are connected to the filter lens controller, and the filter lens controller is connected to and controls the electromagnet; The optical lens is connected with an electromagnet, and the opening and closing of the optical filter lens to the window is controlled by the electromagnet.

Opening window 5 on the face shield is convenient for the welder to observe welding process and other work, and installing photoelectric sensor on the face shield is to be used to detect the generation of arc light. On the window 5, the filter lens 4 is movably installed. In this example, the filter lens 4 is hinged on the side of the window 5 through the filter lens hinge shaft 3, and one end of the connecting rod 1 is hinged on the filter lens through the connecting rod hinge shaft 2. 4, the other end of the connecting rod 1 is hinged on the moving iron of the electromagnet 6. Back-moving spring 7 is housed on the electromagnet, and the elastic force of back-moving spring 7 promotes filter lens 4 to rotate and open around filter lens hinge 3 through connecting rod 1. When the electromagnet is energized and engaged, the connecting rod 1 pulls the filter lens 4 to rotate around the filter lens hinge axis 3 to close the window 5, as shown in FIG. 1 .

In the working process of the present invention, in general, the elastic force of the return spring 7 on the electromagnet promotes the filter lens 4 to rotate around the filter lens hinge axis 3 through the connecting rod 1, so that the filter lens 4 is in an open state. Therefore at this moment window 5 does not have any cover, is fully transparent, so, even if it is the environment of insufficient light, face shield also can not influence the work of welder, has realized the object of the present invention; When welder welds, be contained on the face shield The photoelectric sensor detects the eye-damaging arc light and sends this signal to the filter lens controller, and after the filter lens controller receives this signal and processes it, the filter lens 4 is driven by the electromagnet to close the window 5 at once. In this way, the arc light cannot directly reach the eyes of the welder, and the purpose of protecting the eyes of the welder is achieved.

Claims (1)

1. The automatic mechanical dimming mask mainly includes a filter lens, a filter lens controller and an electromagnet. It is characterized in that: a photoelectric sensor, an electromagnet and a window are installed on the mask, and the photoelectric sensor is connected to the filter lens controller. The filter lens controller is connected with and controls the electromagnet; the filter lens is movably installed on the window, the filter lens is connected with the electromagnet and the opening and closing of the filter lens to the window is controlled by the electromagnet.