CN201328929Y - Electric light gate for electric welding protective hood - Google Patents
Electric light gate for electric welding protective hood Download PDFInfo
- Publication number
- CN201328929Y CN201328929Y CNU2009200316598U CN200920031659U CN201328929Y CN 201328929 Y CN201328929 Y CN 201328929Y CN U2009200316598 U CNU2009200316598 U CN U2009200316598U CN 200920031659 U CN200920031659 U CN 200920031659U CN 201328929 Y CN201328929 Y CN 201328929Y
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- circuit
- light valve
- source
- liquid crystal
- electric welding
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Abstract
The utility model discloses an electric light gate for electric welding protective hood which includes a direct current main, a casing installed on the electric welding protective hood, a circuit board installed in the casing and a light-sensitive circuit for inducing extraneous light, the casing is equipped with a left installing port and a right installing port for installing a protective glasses lens, two protective glasses lens are also a liquid crystal light gate or one is a liquid crystal light gate and another is a black sunglass lens, the circuit board is equipped with a control circuit for controlling the liquid crystal light gate; the control circuit connects with the direct current main through a cut-in-out switch K1, a square wave generating circuit for providing electrical power to the liquid crystal light gate, and a sensitivity control circuit for controlling and adjusting the square wave generating circuit, the light-sensitive circuit connects with the sensitivity control circuit. The electric light gate has simple structure, small volume, low cost, easy operation and better using effect which can solve problem that the electric welding protective hood can not protect welder eyesight efficiently.
Description
Technical field
This utility model relates to a kind of electronic light valve, especially relates to a kind of electric welding protective cover electronic light valve.
Background technology
In the arc welding field, employed traditional protective mast mostly is the hand-held electric welder's helmet greatly, and this hand-held electric welder's helmet all is that one of embedding can stop infrared ray and ultraviolet dark glass on its window, and during use, hand shield blocks back and forth.Use in this type of hand-held electric welder's helmet welding process, if cover face with face shield before the welding, then the welder will cannot see solder joint; If the reuse face shield covers face after the striking, welder's vision and face will be subjected to the stimulation of electric arc high light simultaneously so, in addition, take hands of welder during use for a long time, operation inconvenience.
Along with technical development, nowadays also there is a kind of protective mast that is applicable to the employing large-area liquid crystal photo chromic glass in the thermoluminescence welding cutting as the protective cover glass screen on the market, the control section of its glass screen has has only adopted photocell element, does not have sensitivity adjustment device and other control circuit part; Though what have has adopted the sensitivity adjustment device; but the equal more complicated of its control circuit and protective roof structure; thereby the fair needed technical standard of weldering cover that all do not reach of existing protective cover photo chromic glass; can not play complete protective effect to welder's vision; and large-area liquid crystal photo chromic glass cost is too high, and is very uneconomical.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art; a kind of electric welding protective cover electronic light valve is provided; it is simple in structure, volume is little, cost is low and it is easy to operate to use, result of use good, can effectively solve the electric welding protective cover can not effectively carry out safeguard protection to welder's vision problem.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of electric welding protective cover electronic light valve, it is characterized in that: comprise dc source, be installed on framework on the electric welding protective cover, be installed in the intravital circuit board of frame and in real time extraneous light carried out induced photosensitive circuit, two installing ports that are used to install protection glass about described framework is provided with, two protection glass are liquid crystal light valve or one and are liquid crystal light valve and another black ink eyeglass, and circuit board is provided with the control circuit that liquid crystal light valve is controlled; Described control circuit joins by on and off switch K1, with dc source and square wave generation circuit that liquid crystal light valve is powered and square wave generation circuit carried out the sensitivity adjustment circuit of regulating and controlling, and described photosensitive circuit and sensitivity adjustment circuit join.
Be connected to an inversion step-up circuit that dc source voltage is promoted between described dc source and square wave generation circuit, the voltage signal of dc source is transported to square wave generation circuit behind inversion step-up circuit and rectification circuit.
Described square wave generation circuit comprises G1, G2, G3 and four NAND gate of G4, wherein G1 and G4 are the NAND gate of three inputs, G2 and G3 are the NAND gate of two inputs, an input of G1, G2, G3 and four NAND gate of G4 all joins with sensitivity adjustment circuit, the outfan of G1 joins with another input of G2 and G3 respectively, and another input of the outfan of G3 and G4 joins; The outfan of G3 is connected to the outfan of G1 and another input of G1 through resistance R 5 and R6 respectively after capacitor C 3; The 3rd input of G1 and G4 joins with the positive supply outfan of rectification circuit and the negative pole of dc source respectively; The outfan of G2 and G4 joins with the positive-negative power end of liquid crystal light valve respectively.
Described inversion step-up circuit comprises resistance R 1 and R2, inductance L 1 and L2 and capacitor C 1, the base stage of audion G1 anodal and its base stage through connecing dc source after the resistance R 1 connects the negative pole of dc source successively after inductance L 2, resistance R 2 and capacitor C 1, the colelctor electrode of audion G1 connects the positive pole of dc source and the negative pole that its emitter stage connects dc source after inductance L 1; Described rectification circuit is made up of diode D1 and electrochemical capacitor C2, and the colelctor electrode of the positive pole of diode D1 and audion G1 joins, and the negative pole of diode D1 is connected to the negative pole of dc source behind electrochemical capacitor C2.
Described photosensitive circuit is a photodiode; Described sensitivity adjustment circuit is by potentiometer W1, resistance R 3 and the R4 of serial connection form successively, the negative pole of the sliding end of potentiometer W1 and diode D1 joins, potentiometer W1 is connected to the positive pole of photodiode successively behind resistance R 3 and R4, the negative pole of photodiode and the negative pole of dc source join.
The positive-negative power end of described liquid crystal light valve also is connected to a resistance R 7.
The shape of described framework and liquid crystal light valve is rectangle.
Described framework is a plastic frame body.
Described dc source is the external power supply that is installed in the intravital built-in power of frame or is positioned at the framework outside, and described dc source is a rechargeable battery.
Described liquid crystal light valve divides four layers and be followed successively by coated reflective eyeglass, two black liquid crystal light valve sheets and a transparent glass sheet from outside to inside.
This utility model compared with prior art has the following advantages, and 1, simple in structure and processing and fabricating is convenient.2, the control circuit simplicity of design of liquid crystal light valve and circuit board volume are little, and electronic chip has been realized the miniaturization design.3, result of use is good, adopt the square-wave signal that square wave generation circuit produced to make liquid crystal light valve produce the variation conversion of light and shade, the square-wave signal that square wave generation circuit produces can effectively overcome the color trapping phenomena that liquid crystal light valve is produced when pure DC voltage is worked.4, control circuit is reasonable in design and use easy and simple to handle, in the actual use, by photosensitive circuit is that photodiode GD1 responds to extraneous light in real time and it is delivered to sensitivity adjustment circuit after optical signal that is detected is converted to the signal of telecommunication, according to the real-time institute of photosensitive circuit detection signal, being that potentiometer W1 is corresponding by sensitivity adjustment circuit controls adjustment to square wave generation circuit afterwards.5, do not need to use the large-area liquid crystal photo chromic glass, the area that its liquid crystal light valve that uses is a liquid crystal color-changing glass is less, thereby can reduce cost greatly; In addition, because two were used to install the protection glass installing port about framework was provided with, thereby can further dwindle the area of liquid crystal light valve, and can one in two protection glass another is common black ink eyeglass for liquid crystal light valve, therefore, can further reduce cost of manufacture.6, easy to install and use and widely applicable, in the actual application, the framework that only needs to be equipped with liquid crystal light valve be installed in can use on arbitrary electric welding protective cover and result of use good.In a word, this utility model is simple in structure, volume is little, cost is low and it is easy to operate to use, result of use good, can effectively solve the electric welding protective cover can not effectively carry out safeguard protection to welder's vision problem.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is an external structure sketch map of the present utility model.
Fig. 2 is a circuit block diagram of the present utility model.
Fig. 3 is the circuit theory diagrams of Fig. 2.
Description of reference numerals:
The 1-framework; The 2-circuit board; The 3-liquid crystal light valve;
The 4-photodiode; The 5-dc source; The 7-square wave generation circuit;
The 8-sensitivity adjustment circuit; The 9-photosensitive circuit; The 10-inversion step-up circuit;
The 11-rectification circuit; The 12-charger.
The specific embodiment
As shown in Figure 1 and Figure 2, this utility model comprises dc source 5, is installed on framework 1 on the electric welding protective cover, is installed in the circuit board 2 in the framework 1 and in real time extraneous light is carried out induced photosensitive circuit 9.Two installing ports that are used to install protection glass about described framework 1 is provided with, two protection glass are liquid crystal light valve 3 or one and are liquid crystal light valve 3 and another black ink eyeglass.It is the control circuit that light valve GF controls that described circuit board 2 is provided with liquid crystal light valve 3; Described control circuit joins by on and off switch K1, with dc source 5 and square wave generation circuit 7 that liquid crystal light valve 3 is powered and square wave generation circuit 7 carried out the sensitivity adjustment circuit 8 of regulating and controlling, and described photosensitive circuit 9 joins with sensitivity adjustment circuit 8.In addition, four layers of described liquid crystal light valves 3 minutes and be followed successively by coated reflective eyeglass, two black liquid crystal light valve sheets and a transparent glass sheet from outside to inside, that is to say that this liquid crystal light valve 3 is made up of a coated reflective eyeglass, two black liquid crystal light valve sheets and a transparent glass sheet.
In the present embodiment, 7 of described dc source 5 and square wave generation circuits are connected to an inversion step-up circuit 10 that dc source 5 voltages are promoted, and the voltage signal of dc source 5 is transported to square wave generation circuit 7 behind inversion step-up circuit 10 and rectification circuit 11.In the actual use, when the voltage of dc source 5 satisfies the running voltage of liquid crystal light valve 3, then do not need inversion step-up circuit 10.
In conjunction with Fig. 3, described inversion step-up circuit 10 comprises resistance R 1 and R2, inductance L 1 and L2 and capacitor C 1, the base stage of audion G1 anodal and its base stage through connecing dc source 5 after the resistance R 1 connects the negative pole of dc source 5 successively after inductance L 2, resistance R 2 and capacitor C 1, the colelctor electrode of audion G1 connects the positive pole of dc source 5 and the negative pole that its emitter stage connects dc source 5 after inductance L 1; Described rectification circuit 11 is made up of diode D1 and electrochemical capacitor C2, and the colelctor electrode of the positive pole of diode D1 and audion G1 joins, and the negative pole of diode D1 is connected to the negative pole of dc source 5 behind electrochemical capacitor C2.
Described square wave generation circuit 7 comprises G1, G2, G3 and four NAND gate of G4, wherein G1 and G4 are the NAND gate of three inputs, G2 and G3 are the NAND gate of two inputs, an input of G1, G2, G3 and four NAND gate of G4 all joins with sensitivity adjustment circuit 8, the outfan of G1 joins with another input of G2 and G3 respectively, and another input of the outfan of G3 and G4 joins; The outfan of G3 is connected to the outfan of G1 and another input of G1 through resistance R 5 and R6 respectively after capacitor C 3; The 3rd input of G1 and G4 joins with the positive supply outfan of rectification circuit 11 and the negative pole of dc source 5 respectively; The outfan of G2 and G4 joins with the positive-negative power end of liquid crystal light valve 3 respectively.
Described photosensitive circuit 9 is diode GD1 for photodiode 4.Described sensitivity adjustment circuit 8 is by potentiometer W1, resistance R 3 and the R4 of serial connection form successively, the negative pole of the sliding end of potentiometer W1 and diode D1 joins, potentiometer W1 is connected to the positive pole of photodiode 4 successively behind resistance R 3 and R4, the negative pole of the negative pole of photodiode 4 and dc source 5 joins.The positive-negative power end of described liquid crystal light valve 3 also is connected to a resistance R 7.
In the actual use, described dc source 5 is for being installed in the built-in power in the framework 1 or being positioned at the external power supply of framework 1 outside, and described dc source 5 is charged by external special charger 12 for rechargeable battery and its.In the present embodiment, the shape of described framework 1 and liquid crystal light valve 3 is rectangle, and described framework 1 plastic frame body, and in addition, described circuit board 2 and photodiode 4 are installed in framework 1 middle part.Described on and off switch K1 is serially connected in the current supply circuit of dc source 5.
The above; it only is preferred embodiment of the present utility model; be not that this utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to this utility model technical spirit.
Claims (10)
1. electric welding protective cover electronic light valve, it is characterized in that: comprise dc source (5), be installed on framework (1) on the electric welding protective cover, be installed in the circuit board (2) in the framework (1) and in real time extraneous light carried out induced photosensitive circuit (9), two installing ports that are used to install protection glass about described framework (1) is provided with, two protection glass are liquid crystal light valve (3) or one and are liquid crystal light valve (3) and another black ink eyeglass, and circuit board (2) is provided with the control circuit that liquid crystal light valve (3) is controlled; Described control circuit joins by on and off switch K1, with dc source (5) and square wave generation circuit (7) that liquid crystal light valve (3) is powered and square wave generation circuit (7) carried out the sensitivity adjustment circuit (8) of regulating and controlling, and described photosensitive circuit (9) joins with sensitivity adjustment circuit (8).
2. according to the described electric welding protective cover of claim 1 electronic light valve, it is characterized in that: be connected to an inversion step-up circuit (10) that dc source (5) voltage is promoted between described dc source (5) and square wave generation circuit (7), the voltage signal of dc source (5) is transported to square wave generation circuit (7) behind inversion step-up circuit (10) and rectification circuit (11).
3. according to the described electric welding protective cover of claim 2 electronic light valve, it is characterized in that: described square wave generation circuit (7) comprises G1, G2, G3 and four NAND gate of G4, wherein G1 and G4 are the NAND gate of three inputs, G2 and G3 are the NAND gate of two inputs, an input of G1, G2, G3 and four NAND gate of G4 all joins with sensitivity adjustment circuit (8), the outfan of G1 joins with another input of G2 and G3 respectively, and another input of the outfan of G3 and G4 joins; The outfan of G3 is connected to the outfan of G1 and another input of G1 through resistance R 5 and R6 respectively after capacitor C 3; The 3rd input of G1 and G4 joins with the positive supply outfan of rectification circuit (11) and the negative pole of dc source (5) respectively; The outfan of G2 and G4 joins with the positive-negative power end of liquid crystal light valve (3) respectively.
4. according to claim 2 or 3 described electric welding protective cover electronic light valve, it is characterized in that: described inversion step-up circuit (10) comprises resistance R 1 and R2, inductance L 1 and L2 and capacitor C 1, the base stage of audion G1 anodal and its base stage through connecing dc source (5) after the resistance R 1 connects the negative pole of dc source (5) successively after inductance L 2, resistance R 2 and capacitor C 1, the colelctor electrode of audion G1 connects the positive pole of dc source (5) and the negative pole that its emitter stage connects dc source (5) after inductance L 1; Described rectification circuit (11) is made up of diode D1 and electrochemical capacitor C2, and the colelctor electrode of the positive pole of diode D1 and audion G1 joins, and the negative pole of diode D1 is connected to the negative pole of dc source (5) behind electrochemical capacitor C2.
5. according to the described electric welding protective cover of claim 4 electronic light valve, it is characterized in that: described photosensitive circuit (9) is a photodiode (4); Described sensitivity adjustment circuit (8) is by potentiometer W1, resistance R 3 and the R4 of serial connection form successively, the negative pole of the sliding end of potentiometer W1 and diode D1 joins, potentiometer W1 is connected to the positive pole of photodiode (4) successively behind resistance R 3 and R4, the negative pole of the negative pole of photodiode (4) and dc source (5) joins.
6. according to the described electric welding protective cover of claim 2 electronic light valve, it is characterized in that: the positive-negative power end of described liquid crystal light valve (3) also is connected to a resistance R 7.
7. according to claim 1,2 or 3 described electric welding protective cover electronic light valve, it is characterized in that: the shape of described framework (1) and liquid crystal light valve (3) is rectangle.
8. according to claim 1,2 or 3 described electric welding protective cover electronic light valve, it is characterized in that: described framework (1) is plastic frame body.
9. according to claim 1,2 or 3 described electric welding protective cover electronic light valve, it is characterized in that: described dc source (5) is for being installed in the built-in power in the framework (1) or being positioned at the outside external power supply of framework (1), and described dc source (5) is a rechargeable battery.
10. according to claim 1,2 or 3 described electric welding protective cover electronic light valve, it is characterized in that: described liquid crystal light valve (3) divides four layers and be followed successively by coated reflective eyeglass, two black liquid crystal light valve sheets and a transparent glass sheet from outside to inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200316598U CN201328929Y (en) | 2009-01-09 | 2009-01-09 | Electric light gate for electric welding protective hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200316598U CN201328929Y (en) | 2009-01-09 | 2009-01-09 | Electric light gate for electric welding protective hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328929Y true CN201328929Y (en) | 2009-10-21 |
Family
ID=41222308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200316598U Expired - Fee Related CN201328929Y (en) | 2009-01-09 | 2009-01-09 | Electric light gate for electric welding protective hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328929Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167911A (en) * | 2015-06-29 | 2015-12-23 | 柳州蚊敌香业有限公司 | Multifunctional welding mask |
| CN110051471A (en) * | 2019-04-04 | 2019-07-26 | 上海市金山区青少年活动中心 | Eyepiece controllable system and the welding helmet for using the eyepiece controllable system |
| US10667952B2 (en) | 2010-12-01 | 2020-06-02 | 3M Innovative Properties Company | Welding helmet having a filter arrangement |
-
2009
- 2009-01-09 CN CNU2009200316598U patent/CN201328929Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10667952B2 (en) | 2010-12-01 | 2020-06-02 | 3M Innovative Properties Company | Welding helmet having a filter arrangement |
| US11324633B2 (en) | 2010-12-01 | 2022-05-10 | 3M Innovative Properties Company | Welding helmet having a filter arrangement |
| CN105167911A (en) * | 2015-06-29 | 2015-12-23 | 柳州蚊敌香业有限公司 | Multifunctional welding mask |
| CN110051471A (en) * | 2019-04-04 | 2019-07-26 | 上海市金山区青少年活动中心 | Eyepiece controllable system and the welding helmet for using the eyepiece controllable system |
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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: 20091021 Termination date: 20110109 |