CN2131116Y - Automatic extinction goggles - Google Patents
Automatic extinction goggles Download PDFInfo
- Publication number
- CN2131116Y CN2131116Y CN 92214914 CN92214914U CN2131116Y CN 2131116 Y CN2131116 Y CN 2131116Y CN 92214914 CN92214914 CN 92214914 CN 92214914 U CN92214914 U CN 92214914U CN 2131116 Y CN2131116 Y CN 2131116Y
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- light valve
- automatic
- light
- goggles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a pair of automatic extinction goggles for electric welder and workers working in front of a furnace. The automatic extinction goggles make use of the characteristic of a photoresistor which is connected in parallel with a purpose-made liquid crystal light valve that the resistance value decreases intensely when the photoresistor is irradiated by strong light and restores quickly when the strong light disappears. An unsaturated pre-set electric voltage of the purpose-made liquid crystal light valve which is parallel to a polarizing plate and is installed slantwise is driven simultaneously to decrease below threshold value instantly under strong light, in order to make side glancing bright windows be changed into dark windows. When no strong light exists, the unsaturated pre-set electric voltage restore to original state, and the dark windows become bright again. Therefore, the purposes of automatic and universal strong light extinction and normal observation are achieved. The automatic extinction goggles can automatically change to light and dark without any external connecting wire, so the automatic extinction goggles can be widely used for automatically extinguishing light and protecting eyes in various ac or dc welding arc light and arbitrary strong light of a smelter.
Description
The utility model belongs to the automatic delustring safety goggles that electric welder and blast-furnace man use.Being added on all kinds of arc welding masks is the automatic electric weld(ing) safety goggles then, and being added in blast-furnace man's safety helmet leading edge next is automatic smelting furnace safety goggles.
Traditional safety goggles is to utilize the filter glass of different colourities to carry out shading to protect order, and its drawback is that mechanical action moves safety goggles and not only causes and use inconvenience, and can not observe continuously observing thing." welders' mask of automatic beam change " (science magazine of U.S.'s development, 22 pages of 1986 4 phases) and " the liquid crystal mirror arc welding mask " of Hungary's development (electronic market newspaper, phase 26 days the 174th Dec in 1985), circuit complexity not only, make trouble, and be to utilize photosensitive tube to trigger driving circuit to boost and promote the LCD panel deepening, face the shading action and seriously lag behind and observe the thing high light and do not say that the stravismus shading is very incomplete." automatic welding mask " of " electrically controlled automatic face shield for welders " of China's old feel exposed installation meter (utility application number 87201866) and Li Yuwen design (utility application number 91230072.8), though solved shading hysteresis problem, but because of having dragged on line between face shield and the soldering turret, be awkward, and mainly be to be useful for the interchange electric welding, other are observed and are difficult to.The utility model is a shortcoming of avoiding said apparatus, resistance value acutely reduces and does not have the characteristic of the rapid recovery of strong illumination when utilizing the photoresistance in parallel with special liquid crystal light valve to be subjected to strong illumination, ordering about the unsaturated preset voltage of special liquid crystal light valve of the tiltably-mounted of the parallel unanimity of polaroid synchronously reduces to below the threshold voltage when high light immediately, allow the stravismus abatjour all become dark window, voltage recovers when no high light, form is recovered lost eyesight, thereby reaches disappear automatically high light and normal purpose of observing comprehensively.Change owing to be not with any external on line can carry out light and shade automatically, can be widely used in order is protected in the automatic delustring of any high light such as all kinds of AC and DC electro-welding arcs and smelting furnace.
The utility model mainly is made up of mirror shell (1), special liquid crystal light valve group (2), liquid crystal display drive circuit (3), photoresistance (4).Special liquid crystal light valve group (2) is inclined in the mirror shell (1).It by one to three light valve liquid crystal cell (9), polaroid (10), filter ultraviolet sheet (11) and the filter infrared antisolar glass (12) be formed by stacking by figure two, it is a pair of that each liquid crystal cell adds polaroid, the polarization direction keeping parallelism unanimity of all polaroids (10) allows the liquid crystal light valve group be dark window state (this is opposite with the common LCD panel practice) when no electric field or weak electric field (being lower than threshold voltage).In the liquid crystal display drive circuit (5), battery (6) is added on the DC/AC inverter (7) after battery cover (5) is connected, output AC square-wave pulse (32-500HZ) voltage, reduce to through voltage grading resistor (8) that the voltage less than the light valve saturation voltage is added on two electrodes of liquid crystal light valve group (2) greater than the light valve threshold voltage, making liquid crystal light valve group (2) is hazy in positive apparent time, just bright entirely when stravismus.Photo-resistor (4) is in parallel with liquid crystal light valve group (2), and its surface adds the filter coating that applies one deck plating, is the high value state under normal illumination conditions, and light valve voltage is not had influence, still is abatjour; When meeting high light (as arc light and molten stove light etc.) irradiation, photo-resistor is low resistance (less than a kilo-ohm level) state, the big immediately portion of voltage in the circuit transfers on the divider resistance (8) of several kilo-ohms of levels, it is following far that the voltage follow of liquid crystal light valve drops to threshold voltage, make light valve recover dark window immediately, the effect that divider resistance this moment (8) is undertaken the delustring pull-up resistor.Because form is tilting, abatjour is that voltage starting is closed in insatiable hunger, and liquid crystal is in partly deflection state, reaches comprehensive delustring deepening immediately during the faint decline of voltage, and its deepening response time is extremely short, for naked eyes can not be differentiated.Among the mirror shell (1) that the lucifuge of all parts packing into insulate.The perforate (13) outer by the mirror shell links to each other with arc welding mask or blast-furnace man's safety helmet leading edge.Safety goggles can change the sheet number of light valve, the sheet number of polaroid and even the parallel degree of polaroid and form shade number series, to satisfy the needs of electric welder's eyesight different with the blast-furnace man and different environment of observation.
The utility model is the wireless automatic delustring safety goggles that present parts are minimum, structure is the easiest, be widely used in the various arc-welding machine of AC and DC, also be applicable to various oxygen welding machine, work before also being applicable to smelting furnace, even can suitably change the usefulness that outward appearance is protected order as work under and other high lights anti-dazzle to motor-driven vehicle headlight adapter.
Because the utility model has overcome the shortcoming of aforementioned original each relevant design of family, wireless automatic delustring is easy to use, can shift to an earlier date work efficiency effectively and protect order more reliably.
Description of drawings:
Figure one. safety goggles profile synoptic diagram; Figure two. safety goggles transverse section and circuit diagram.
1-safety goggles shell, 1a-shell bottom, 1b-shell lid; The special liquid crystal light valve group of 2-; The 3-liquid crystal display drive circuit; The 4-photo-resistor; 5-battery cover (the band conduction plays transverse sheet); The 6-battery; The 7-DC/AC inverter; 8-voltage grading resistor (the delustring pull-up resistor of holding concurrently); 9-light valve liquid crystal cell; The 10-polaroid; 11-filter ultraviolet sheet; 12-filters infrared antisolar glass sheet; The external screw of 13-.
Below in conjunction with description of drawings embodiment of the present utility model:
Mirror shell (1) processes by flame-proof ABS is plastic injection-moulded, and the contour dimension existing weldering cover (wear-type and handle type) that is fit to pack into gets final product, and inside casing is to be fit to loading special liquid crystal light valve group and the circuit original paper is as the criterion.Light valve group (2) adopts the light valve liquid crystal cell (9) of two band parallel polarization sheets (10), add filter ultraviolet sheet (11) and filter infrared antisolar glass (12) and build up, its size is fit to binocular perspective and gets final product, angle mount is in mirror case (1a), and the entirely bright side of voltage undersaturated condition catotropia is as the top and the close eyes that tilt.The light valve threshold voltage is selected for use about 2V, response time＜30ms.Battery (6) adopts buckles two of shape 1.5V; DC/AC transducer (7) employing 2018 or close integrated circuit; Voltage grading resistor (8) is selected several kilo-ohms for use, matches with the suitable output electrode of DC/AC transducer, and the voltage that is added at last on the light valve is got final product less than saturation voltage greater than threshold voltage.Battery, DC/AC transducer and voltage grading resistor concentrate on forms liquid crystal display drive circuit (3) in the printed board.It is only any photoresistance in hundreds of Europe of resistance under mega-ohms and the high light according to resistance that photo-resistor (4) is selected for use unglazed, pastes one deck plating filter coating outward to adjust sensitivity, is installed in the suitable position of the shell that arc light all can shine from each side.Because the liquid crystal power consumption is economic, the battery of 120 MAHs can use three, four months continuously, can the additional power source switch.
Claims (3)
1, a kind of automatic delustring safety goggles of being made up of liquid crystal light valve is characterized in that it has the photo-resistor that has the filter coating of adjusting sensitivity [4] in parallel with special liquid crystal light valve group [2] and the DC/AC inverter [7] that the alternating-current pulse square wave is provided for light valve.
2, automatic delustring safety goggles according to claim 1 is characterized in that the whole parallel unanimities in polarization direction of the polaroid (10) in its special liquid crystal light valve group (2), and with light valve liquid crystal cell (9) together tiltably-mounted in safety goggles shell (1).
3, automatic delustring safety goggles according to claim 1 and 2, it is characterized in that special liquid crystal light valve group (2) and be associated with voltage grading resistor (8) between photoresistance in parallel and the DC/AC inverter (7), its resistance is suitable for adjusting the output AC voltage value of DC/AC inverter (7) to the pressure value between required threshold voltage of specific liquid light valve group (2) and the saturation voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92214914 CN2131116Y (en) | 1992-07-11 | 1992-07-11 | Automatic extinction goggles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92214914 CN2131116Y (en) | 1992-07-11 | 1992-07-11 | Automatic extinction goggles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2131116Y true CN2131116Y (en) | 1993-04-28 |
Family
ID=33763925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92214914 Expired - Fee Related CN2131116Y (en) | 1992-07-11 | 1992-07-11 | Automatic extinction goggles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2131116Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068359A (en) * | 2015-08-21 | 2015-11-18 | 中国工程物理研究院流体物理研究所 | Color filter with adjustable central wavelength and color filtering method |
-
1992
- 1992-07-11 CN CN 92214914 patent/CN2131116Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068359A (en) * | 2015-08-21 | 2015-11-18 | 中国工程物理研究院流体物理研究所 | Color filter with adjustable central wavelength and color filtering method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |