CN2822573Y - Eye protecting face mask - Google Patents
Eye protecting face mask Download PDFInfo
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- CN2822573Y CN2822573Y CN 200520060391 CN200520060391U CN2822573Y CN 2822573 Y CN2822573 Y CN 2822573Y CN 200520060391 CN200520060391 CN 200520060391 CN 200520060391 U CN200520060391 U CN 200520060391U CN 2822573 Y CN2822573 Y CN 2822573Y
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- liquid crystal
- face shield
- eye protection
- protection face
- crystal indicator
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Abstract
The utility model discloses an eye protecting face mask which comprises a mask body provided with at least one observation window, at least one liquid crystal display device arranged on the observation window, and a driving device used to drive the liquid crystal display device. The driving device is a light energy and electric energy conversion device which only introduces and generates electricity to preset light rays. The utility model adopts the liquid crystal display device of which the transmittance can be changed directly in an automatic method or a manual method so as to prevent the protecting face mask from being moved frequently. Therefore, the utility model has the advantages of assured welding quality, improved welding speed, and reduced labor intensity for workers.
Description
Technical field
This utility model relates to a kind of protecting mask, especially relates to a kind ofly the time preventing the burn eye protection face shield of eyes of electro-welding arc in welding.
Background technology
At present, the protective surface that freezes that the welder adopted in when welding is covered with two kinds of wear-type and hand-helds, any protecting mask no matter, and its principle all is to inlay dark glass (as cobalt glass) to block arc light burning to workman's eyes in observation window.After putting on protecting mask, because the bridging effect of dark glass, naked eyes can't see that welding is on-the-spot, and the workman can only adjust the position and the angle of welding rod by rule of thumb.Therefore, after a stage of welding job finished, the workman must take off protecting mask; it is on-the-spot to observe welding; assess, check the welding quality in this stage, and then adjust the position and the angle of workpiece and welding rod, and then put on protecting mask and carry out the next stage welding.But; after adjusting position and angle at every turn; before beginning welding; a process of putting on protecting mask is all arranged; in this process, human eye can not monitor directly that welding is on-the-spot, and the workman is in the process of doing this action of masking; aligned welding rod may be shifted because of the influence of human action, and the person will directly influence the quality of welding.Frequent mobile protecting mask has promptly increased working strength of workers has simultaneously been wasted labor time again.
Development along with technology, some having occurred can self-regulating electric welder's helmet, announce a kind of controlled window formula electric welder's helmet of 2168426Y number announcement as Chinese patent, it is made up of face shield, optical filter matrix, controlled window, light valve automatic controller, on the middle part of face shield, be provided with the optical filter matrix, the bottom of optical filter matrix is provided with controlled window, the top of optical filter matrix is provided with the light valve automatic controller, it is by the light valve automatic controller, the arc light that sends when the utilizing electric welding controlled window blackening of control has automatically avoided welding the flash stimulation of moment.But the light valve automatic controller of this controlled window formula electric welder's helmet is subjected to the interference of external light source easily, and the relative electric welding starting the arc of controlled window blackening life period lags behind.
And for example Chinese patent is announced a kind of liquid crystal electric welder's helmet of 2535015Y number announcement, it is made up of optical sensor, controller, liquid crystal lens, mask body, it is characterized in that the window on the mask body is provided with liquid crystal lens, optical sensor is connected the controller input, and controller output end is connected on the electrode of liquid crystal lens.Optical sensor is influenced by the solder joint light intensity, makes the corresponding voltage of control output, makes liquid crystal lens change color depth.But this liquid crystal electric welder's helmet changes the hysteresis of the same life period of color to the control liquid crystal lens from optical sensor induction high light.
Chinese patent is announced No. 1395912 a kind of automatic mask for welder and Chinese patent is announced electronics automatic color-changing electric welding protective mask No. 2676873 for another example, and whether these two patents all are to exist as the variable color of control signal control liquid crystal lens by detecting welding current.But it is complex structure not only, and passes through the wireless signal communication between face shield and the bonding machine, and the generation time that is interfered easily lags behind.
Therefore, provide a kind of can improve welding quality and speed of welding, and effectively the protecting mask of protection operator eyes become the industry urgent problem.
Summary of the invention
The purpose of this utility model provides a kind of eye protection face shield that changes the observation window transmittance.
Technical scheme of the present invention is achieved in that a kind of eye protection face shield; it comprises a face shield body that is provided with at least one observation window, liquid crystal indicator that at least one is installed in described observation window and in order to drive the driving device of described liquid crystal indicator, described driving device is the transform light energy electrical energy devices.
Above-mentioned liquid crystal indicator is made up of conducting medium layer more than two groups or two groups and at least one group of liquid crystal layer, and above-mentioned liquid crystal layer is installed between the two adjacent groups conducting medium layer, and the conducting medium layer is transparent electro-conductive glass.
Above-mentioned optical energy power plate is provided with the sensitization value, and it generates electricity to the light sensing that light intensity is greater than or equal to described sensitization value, but and the electric energy moment driving liquid crystal indicator that produces.
Above-mentioned eye protection face shield further comprises a holding apparatus, and this holding apparatus is handle apparatus or head hoop band, and perhaps above-mentioned eye protection mask designs being become integral body is a helmet-shaped.
Above-mentioned eye protection face shield further comprises the switching device in order to set up electric power is connected between driving device and the liquid crystal indicator connecting device and to be connected in order to electric power between closed driving device and the liquid crystal indicator.
Above-mentioned eye protection face shield can adopt hand switch; open switch when needing shading; shut switch when not needing shading; further hand switch and welding switch can be made as synchronously, hand switch also is unlocked and drives liquid crystal indicator and changes the shading state into by light transmission state when opening the welding switch.
Above-mentioned eye protection face shield can adopt special light sensor; described special light is that one or several are to the deleterious light of human eye; be not limited to welding arc light; when sensing described special light; produce control signal; in order to open the supply of electric power of driving device, change the shading state into by light transmission state thereby drive liquid crystal indicator.
Above-mentioned transform light energy electrical energy devices can be replaced by aneroid battery, accumulator or alternating current conversion DC plant.
The beneficial effects of the utility model are: employing can directly change the liquid crystal indicator of transmittance by automatic or manual method; what make that protecting mask needn't be frequent moves; thereby guaranteed the quality of welding, improved the speed of welding, reduced labor strength.
Below in conjunction with embodiment, further specify this utility model, but this utility model is not limited to these embodiment, any on this utility model essence spirit improvement or substitute, still belong to scope required for protection in claims of the present invention.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further described:
Fig. 1 is the structural representation of this utility model embodiment 1.
Fig. 2 is the operating circuit sketch map of this utility model embodiment 1.
Fig. 3 is the user mode sketch map of this utility model embodiment 1.
The specific embodiment
Please in the lump referring to figs. 1 through Fig. 3; the eye protection face shield of embodiment 1; in order in the process of freezing, blocking the injury of 8 pairs of operator's eyes of arc source, it comprise a face shield body 1, that is provided with observation window 3 be installed in the liquid crystal indicator 4 of described observation window 3, a transform light energy electrical energy devices 5, one in order to the head hoop band 7 that face shield body 1 is fixed in operator's head and in order to set up the connecting device 9 that electric power is connected between transform light energy electrical energy devices 5 and the liquid crystal indicator 4.
Described liquid crystal indicator 4, its principle is to adopt a kind of stable twisted nematic (TwistedNematic, abbreviation TN) liquid crystal display cells (the Thin Film Transistor of type, be called for short LCD), this TN type LCD comprises two electro-conductive glass and is arranged in two liquid crystal molecules (figure does not show) between the electro-conductive glass.Under normal circumstances, the ordered state of this liquid crystal molecule is set to allow the transparent electro-conductive glass of light penetration and liquid crystal molecule arrive an other side from a side of liquid crystal indicator 4, thereby can see the light source of opposite side across liquid crystal indicator 4, this is the light transmission state of liquid crystal indicator 4.After to two electro-conductive glass energisings, will form electric field between two-layer electro-conductive glass, and then influence liquid crystal molecule therebetween, liquid crystal molecule is reversed, according to the power of electric field, the angle that liquid crystal molecule reverses is also different, corresponding logical light quantity is also different, and when 90 ° of liquid crystal molecule generations were reversed, light just can't penetrate liquid crystal molecule, and then just can't see the light source of opposite side from a side of liquid crystal indicator 4, this is the shading state of liquid crystal indicator 4.
Described transform light energy electrical energy devices 5 is an optical energy power plate, this optical energy power plate is provided with the sensitization value, the size of sensitization value that should be default is determined according to the intensity of common welding arc light, this optical energy power plate induction generating when arc light intensity is greater than or equal to default sensitization value, and the electric energy that produces can drive 4 moments of described liquid crystal indicator and changes the shading state into from light transmission state.This optical energy power plate does not produce induction to ordinary ray, and promptly when not freezing arc light, this optical energy power plate can not responded to generating, and then liquid crystal indicator 4 is in light transmission state all the time under the situation of the arc light that do not freeze.
Electric power is connected described connecting device 9 between transform light energy electrical energy devices 5 and the liquid crystal indicator 4 in order to set up, the one end is corresponding continuous with the both positive and negative polarity of the power output end of transform light energy electrical energy devices 5, the other end divides both positive and negative polarity to link to each other with the two-layer electro-conductive glass of liquid crystal indicator 4 respectively, the electric power that transform light energy electrical energy devices 5 produces forms electric field between two-layer electro-conductive glass, thereby liquid crystal molecule is therebetween twisted under effect of electric field.
The operator is fixed on head with head hoop band 7 before welding, make the observation window 3 of eye protection face shield 4 be positioned at the place ahead of eyes.The operator can see through observation window 3 and see that welding is on-the-spot, and adjusts the position and the angle of weldment or welding rod as required easily; Freeze after the beginning, transform light energy electrical energy devices 5 induction arc lights are converted into electric energy with luminous energy and drive 4 moments of liquid crystal indicator and change the shading state into from light transmission state.After welding was finished, arc light disappeared, and transform light energy electrical energy devices 5 no longer produces electric energy, and then liquid crystal indicator 4 is a light transmission state from the shading state-transition.
Electro-conductive glass of the present utility model also can substitute with other transparent conducting medium.
The outside installing of liquid crystal indicator 4 of the present utility model is installed cover glass simultaneously in order to the cover glass or the inside and outside both sides of protection liquid crystal indicator 4.
Head hoop band of the present utility model also can be substituted by handle apparatus, also eye protection face shield integral body can be made helmet-shaped, perhaps adopts other holding apparatus.
Liquid crystal indicator of the present utility model 4 is as long as suitably sets the windup-degree of its liquid crystal material, can as required the eye protection mask designs be become to allow part light see through rather than cover fully.
Embodiment 2
As another kind of embodiment of the present utility model, cancellation transform light energy electrical energy devices 5, transfer to and adopt other driving device to drive this liquid crystal indicator 4, as aneroid battery, accumulator or alternating current conversion DC plant, and further be provided with the switching device that a high light induction apparatus and are connected in order to electric power between closed driving device and the liquid crystal indicator 4.After the welding arc light produced, the high light induction apparatus produced control signal, and control signal makes power switch open, and the power delivery of driving device makes it change the shading state into by light transmission state to liquid crystal indicator 4.
Embodiment 3
As another embodiment of the present utility model, adopt hand switch, open switch when needing shading, shut switch when not needing shading, its driven by power can be provided by transform light energy electrical energy devices 5, aneroid battery, accumulator or alternating current conversion DC plant.
Further hand switch and welding switch can be made as synchronously or will weld the switch suitable time-delay, when opening the welding switch, hand switch is unlocked simultaneously and drives liquid crystal indicator 4 and changes the shading state into by light transmission state, connects welding circuit behind the welding switch suitable time-delay and begins welding.
As another embodiment of the present utility model, can adopt special light sensor, described special light is that one or several are to the deleterious light of human eye, be not limited to welding arc light, when sensing described special light, produce control signal,, change the shading state into by light transmission state thereby drive liquid crystal indicator 4 in order to open the supply of electric power of driving device.
Claims (10)
1. eye protection face shield; comprise a face shield body that is provided with at least one observation window, liquid crystal indicator that at least one is installed in described observation window, at least one is in order to the driving device that drives described liquid crystal indicator and in order to set up the connecting device that is electrically connected between driving device and the liquid crystal indicator; it is characterized in that: the transform light energy electrical energy devices of described driving device for only default light sensing being generated electricity; it is installed near the periphery of described observation window, and the electric energy of its generation is passed to liquid crystal indicator by connecting device.
2. eye protection face shield as claimed in claim 1 is characterized in that: described liquid crystal indicator is made up of conducting medium layer more than two groups or two groups and at least one group of liquid crystal layer.
3. eye protection face shield as claimed in claim 2; it is characterized in that: described liquid crystal layer is installed between the two adjacent groups conducting medium layer; described conducting medium layer is an electro-conductive glass; described liquid crystal layer is made up of the liquid crystal molecule of arranging by rule, and the outside installing cover glass or the inside and outside both sides of described liquid crystal indicator are installed cover glass simultaneously.
4. eye protection face shield as claimed in claim 3; it is characterized in that: described transform light energy electrical energy devices is the optical energy power plate; the power delivery that described optical energy power plate produces makes to form between the adjacent conductive glass in order to drive the electric field that liquid crystal molecule reverses to described electro-conductive glass.
5. eye protection face shield as claimed in claim 4 is characterized in that: described optical energy power plate is provided with the sensitization value, and it is greater than or equal to the light sensing generating of described sensitization value to light intensity, but and the electric energy moment that produces drive described liquid crystal indicator.
6. eye protection face shield as claimed in claim 5 is characterized in that: described eye protection face shield further comprises a holding apparatus.
7. eye protection face shield as claimed in claim 6 is characterized in that: described holding apparatus is handle apparatus or head hoop band, and perhaps the global design of eye protection face shield is a helmet-shaped.
8. eye protection face shield as claimed in claim 1 is characterized in that: described eye protection face shield further comprises in order to respond to certain light and to produce the light sensor of control signal.
9. eye protection face shield as claimed in claim 1 is characterized in that: described eye protection face shield further comprises the switching device that is connected in order to electric power between closed driving device and the liquid crystal indicator.
10. eye protection face shield as claimed in claim 9; it is characterized in that: described transform light energy electrical energy devices can be replaced by aneroid battery, accumulator or alternating current conversion DC plant; described eye protection face shield further comprises the welding switch, synchronous with described switching device or the relative described switching device suitable time-delay of described welding switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060391 CN2822573Y (en) | 2005-06-29 | 2005-06-29 | Eye protecting face mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060391 CN2822573Y (en) | 2005-06-29 | 2005-06-29 | Eye protecting face mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2822573Y true CN2822573Y (en) | 2006-10-04 |
Family
ID=37031681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520060391 Expired - Fee Related CN2822573Y (en) | 2005-06-29 | 2005-06-29 | Eye protecting face mask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2822573Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106535840A (en) * | 2014-05-13 | 2017-03-22 | 李东宪 | Welding helmet having automatic wireless light-blocking means and control method therefor |
| CN106974763A (en) * | 2017-04-10 | 2017-07-25 | 胡达广 | Wireless automatic beam change mask |
-
2005
- 2005-06-29 CN CN 200520060391 patent/CN2822573Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106535840A (en) * | 2014-05-13 | 2017-03-22 | 李东宪 | Welding helmet having automatic wireless light-blocking means and control method therefor |
| CN106974763A (en) * | 2017-04-10 | 2017-07-25 | 胡达广 | Wireless automatic beam change mask |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061004 |