CN2233591Y - Safety lamp for use in darkroom - Google Patents
Safety lamp for use in darkroom Download PDFInfo
- Publication number
- CN2233591Y CN2233591Y CN 95239139 CN95239139U CN2233591Y CN 2233591 Y CN2233591 Y CN 2233591Y CN 95239139 CN95239139 CN 95239139 CN 95239139 U CN95239139 U CN 95239139U CN 2233591 Y CN2233591 Y CN 2233591Y
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- circuit
- current
- constant
- light emitting
- emitting diode
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Abstract
The utility model relates to a darkroom safe lamp whose monochromatic source is connected to the monochromatic luminous diodes of a direct-current and constant-current source. The total intensity of the luminous diode in each safelight is not less than 450 milli-candela, and the number of the luminous diodes is not more than 6. The direct-current and constant-current source is transformed by an alternating-current source through an alternating-current pressure limiting circuit, a constant-current decompressing circuit, a rectifying and smoothing circuit, a constant-current pressure limiting circuit, a pressure stabilizing circuit, and an adjustable constant current circuit. The sphere curved surface of the diode back is a reflector, the middle part of a lamp cover is a partially photic rough surface, and an optical diode is the luminous diode which can only generate yellow light or red light. The utility model has the advantages of low cost, long life time as 40-100 thousand hours, tenfold higher luminous efficiency, narrow frequency spectrum, uniform illumination intensity, and little influence on human eyesight.
Description
The utility model relates to the safety lamp that uses in a kind of lighting device, particularly darkroom.
In the prior art, the safety lamp that use in the darkroom comprises lamp bracket, monochromatic source, attaching plug, and in its monochromatic source, sodium yellow is to use sodium lamp as light source, and red light or green light add redness with incandescent lamp or green color filter produces.Wherein, sodium lamp cost height, have only 800-3000 hours serviceable life, and very easily damage; And the monochromatic light that color filter produces, light efficiency is low; Frequency spectrum is wide, easily film or printing paper is exerted an influence; Cause uncomfortable sensation to human eye, bigger to staff's eyesight influence.
The utility model has proposed the safelight of the single color LED of the high illumination of a kind of usefulness, high degree of safety as monochromatic source at the deficiencies in the prior art.
Task of the present utility model is to realize like this, the utility model is a kind of safelight, comprise lamp bracket, monochromatic source, attaching plug, be characterized in that monochromatic source is that the two poles of the earth are connected on the single color LED on the dc constant flowing power, in same lamp, the total intensity of single color LED is not less than 450 milli candelas, no more than 6 of single color LED quantity.The optical spectrum that light emitting diode sends is narrow, can produce stable high illuminance and guarantees the darkroom high security.And volume is little, cost is low.
Described safelight is characterized in that dc constant flowing power is to be formed by interchange voltage-limiting protection circuit, step-down constant-current circuit, current rectifying and wave filtering circuit, direct current voltage-limiting protection circuit, mu balanced circuit, the conversion of adjustable constant-flow circuit of AC power through being contained on the wiring board.Entire product is integrated, uses power supply convenient.
Described safelight; being characterized in exchanging the voltage-limiting protection circuit is to constitute at an ac power input end Zinc-oxide piezoresistor in parallel; the step-down constant-current circuit is that the non-polarized capacitor of a series connection constitutes; current rectifying and wave filtering circuit is conventional current rectifying and wave filtering circuit; direct current voltage-limiting protection circuit is that the Zinc-oxide piezoresistor that is connected in parallel on rectification filter circuit output end constitutes; mu balanced circuit is that parallel connection is contained in constant-current circuit voltage stabilizing diode formation before, and the adjustable constant-flow circuit is that the integrated constant current tube of variable semiconductor that is connected on circuit output end of pressure-stabilizing constitutes.Can reduce cost, simplify production technology.
Described safelight, be characterized in preferably serving as a contrast between light emitting diode back and the adjustable plate with the sphere curved surface reflector, the distance at light emitting diode and reflector center is not more than 1/8 of reflector spherical diameter, the light emitting diode front portion is provided with transparent lamp shade, the core of transparent lamp shade is the uneven surface of part printing opacity, two pins of light emitting diode are separately fixed on the adjustable plate, and adjustable plate is fixed in the case of the band louvre on the lamp bracket by adjusting screw.This structure makes the illumination of face to be illuminated even.
Described safelight is characterized in being connected to heat radiator on two pins of light emitting diode.Guarantee light source operate as normal at high temperature, and luminous intensity is reduced with the variation range of temperature effect.
Described safelight is characterized in that light emitting diode is the light emitting diode of light of only turning to be yellow.It is the security that guarantees colour paper.
Described safelight is characterized in that light emitting diode is the light emitting diode of a green light.It is the security that guarantees black and white film.
Described safelight is characterized in that light emitting diode is the light emitting diode that only glows.It is the security that guarantees black and white photographic paper, X-ray film and X-ray darkroom.
The utility model compared with prior art owing to adopted single color LED to make monochromatic source, it is with low cost; Reach 4 ten thousand-10 ten thousand hours serviceable life; And luminescence efficiency improves tens of times, economize on electricity; Narrow spectrum, the degree of safety height, minimum to film or printing paper influence; Illumination is high and even, stable; During use, human eye perceives is comfortable, and is little to staff's eyesight influence.
Fig. 1 is a side-looking structural representation of the present utility model.
Fig. 2 is a backsight structural representation of the present utility model.
Fig. 3 is the circuit block diagram on the utility model wiring board.
Fig. 4 is the circuit diagram on the utility model wiring board.
Embodiment one: Fig. 1, Fig. 2, Fig. 3, Fig. 4, described a kind of embodiment of the present utility model.Fig. 1; it among Fig. 2 the safelight of instead of sodium light modulation when handling colour paper in a kind of darkroom; in the base (1) of lamp bracket (4), wiring board (3) is housed; the power lead of wiring board (3) connects ac power plug (2); AC power is through being contained in the interchange voltage-limiting protection circuit (15) on the wiring board (3); step-down constant-current circuit (16); current rectifying and wave filtering circuit (17); direct current voltage-limiting protection circuit (18); mu balanced circuit (19); adjustable constant-flow circuit (20) is transformed into stable dc constant flowing power; circuit such as Fig. 3 on the wiring board (3); shown in Figure 4, exchanging voltage-limiting protection circuit (15) is at ac power input end Zinc-oxide piezoresistor (Rv in parallel
1) constitute, step-down constant-current circuit (16) is the non-polarized capacitor (C of a series connection
1) constitute, current rectifying and wave filtering circuit (17) is conventional current rectifying and wave filtering circuit (VD
1-4, C
2, C
3, R
1), direct current voltage-limiting protection circuit (18) is the Zinc-oxide piezoresistor (Rv that is connected in parallel on current rectifying and wave filtering circuit (17) output terminal
2) constitute, mu balanced circuit (19) is that parallel connection is contained in constant-current circuit (20) voltage stabilizing diode (VD before
5) constitute, adjustable constant-flow circuit (20) is that the integrated constant current tube of variable semiconductor (V) that is connected on mu balanced circuit (19) output terminal constitutes its adjuster bar (14) protuberate basic unit (1) surface.With luminous intensity is that (11) two pins of light emitting diode of the coloured light that only turns to be yellow of 1000 milli candelas are separately fixed on two radiating copper sheet (12) of adjustable plate (9), and joins by lead (5) and dc constant current power supply output terminal.Adjustable plate (9) is fixed in the case (6) of the band louvre (8) on the lamp bracket (4) by adjusting screw (7).Lining is 7 centimetres of sphere curved surface reflectors (10) with spherical diameter between light emitting diode (11) back and the adjustable plate (9), light emitting diode (11) is 0.7 centimetre with the distance at reflector (10) center, light emitting diode (11) front portion is provided with transparent lamp shade (13), and the core of transparent lamp shade (13) is the uneven surface of part printing opacity.
Embodiment two: Fig. 1, Fig. 2, Fig. 3, Fig. 4, described another kind of embodiment of the present utility model.Fig. 1; it among Fig. 2 the safelight when handling black and white film in a kind of darkroom; in the base (1) of lamp bracket (4), wiring board (3) is housed; the power lead of wiring board (3) connects ac power plug (2); AC power is through being contained in the interchange voltage-limiting protection circuit (15) on the wiring board (3); step-down constant-current circuit (16); current rectifying and wave filtering circuit (17); direct current voltage-limiting protection circuit (18); mu balanced circuit (19); adjustable constant-flow circuit (20) is transformed into stable dc constant flowing power; circuit such as Fig. 3 on the wiring board (3); shown in Figure 4, exchanging voltage-limiting protection circuit (15) is at ac power input end Zinc-oxide piezoresistor (Rv in parallel
1) constitute, step-down constant-current circuit (16) is the non-polarized capacitor (C of a series connection
1) constitute, current rectifying and wave filtering circuit (17) is conventional current rectifying and wave filtering circuit (VD
1-4, C
2, C
3, R
1), direct current voltage-limiting protection circuit (18) is the Zinc-oxide piezoresistor (Rv that is connected in parallel on current rectifying and wave filtering circuit (17) output terminal
2) constitute, mu balanced circuit (19) is that parallel connection is contained in constant-current circuit (20) voltage stabilizing diode (VD before
5) constitute, adjustable constant-flow circuit (20) is that the integrated constant current tube of variable semiconductor (V) that is connected on mu balanced circuit (19) output terminal constitutes its adjuster bar (14) protuberate basic unit (1) surface.With luminous intensity is that (11) two pins of light emitting diode of a glow green of 300 milli candelas are separately fixed on two radiating copper sheet (12) of adjustable plate (9), and joins by lead (5) and dc constant current power supply output terminal.Adjustable plate (9) is fixed in the case (6) of the band louvre (8) on the lamp bracket (4) by adjusting screw (7).Lining is 6 centimetres of sphere curved surface reflectors (10) with spherical diameter between light emitting diode (11) back and the adjustable plate (9), light emitting diode (11) is 0.6 centimetre with the distance at reflector (10) center, light emitting diode (11) front portion is provided with transparent lamp shade (13), and the core of transparent lamp shade (13) is the uneven surface of part printing opacity.
Embodiment three: Fig. 1, Fig. 2, Fig. 3, Fig. 4, described another embodiment of the present utility model.Fig. 1; be to handle black and white photographic paper in a kind of darkroom among Fig. 2; X-ray film; during X-ray printing paper; and the safelight of X-ray darkroom use; in the base (1) of lamp bracket (4), wiring board (3) is housed; the power lead of wiring board (3) connects ac power plug (2); AC power is through being contained in the interchange voltage-limiting protection circuit (15) on the wiring board (3); step-down constant-current circuit (16); current rectifying and wave filtering circuit (17); direct current voltage-limiting protection circuit (18); mu balanced circuit (19); adjustable constant-flow circuit (20) is transformed into stable dc constant flowing power; circuit such as Fig. 3 on the wiring board (3); shown in Figure 4, exchanging voltage-limiting protection circuit (15) is at ac power input end Zinc-oxide piezoresistor (Rv in parallel
1) constitute, step-down constant-current circuit (16) is the non-polarized capacitor (C of a series connection
1) constitute, current rectifying and wave filtering circuit (17) is conventional current rectifying and wave filtering circuit (VD
1-4, C
2, C
3, R
1), direct current voltage-limiting protection circuit (18) is the Zinc-oxide piezoresistor (Rv that is connected in parallel on current rectifying and wave filtering circuit (17) output terminal
2) constitute, mu balanced circuit (19) is that parallel connection is contained in constant-current circuit (20) voltage stabilizing diode (VD before
5) constitute, adjustable constant-flow circuit (20) is that the integrated constant current tube of variable semiconductor (V) that is connected on mu balanced circuit (19) output terminal constitutes its adjuster bar (14) protuberate basic unit (1) surface.With luminous intensity is that (11) two pins of light emitting diode of a burn red of 20000 milli candelas are separately fixed on two radiating copper sheet (12) of adjustable plate (9), and joins by lead (5) and dc constant current power supply output terminal.Adjustable plate (9) is fixed in the case (6) of the band louvre (8) on the lamp bracket (4) by adjusting screw (7).Lining is 8 centimetres of sphere curved surface reflectors (10) with spherical diameter between light emitting diode (11) back and the adjustable plate (9), light emitting diode (11) is 0.9 centimetre with the distance at reflector (10) center, light emitting diode (11) front portion is provided with transparent lamp shade (13), and the core of transparent lamp shade (13) is the uneven surface of part printing opacity.
Claims (8)
1, a kind of safelight comprises lamp bracket (4), monochromatic source (11), attaching plug (2), it is characterized in that monochromatic source (11) is that the two poles of the earth are connected on the single color LED (VD on the dc constant flowing power
6), in same lamp, the total intensity of single color LED (11) is not less than 450 milli candelas, no more than 6 of single color LED (11) quantity.
2, safelight according to claim 1 is characterized in that dc constant flowing power is to be formed by interchange voltage-limiting protection circuit (15), step-down constant-current circuit (16), current rectifying and wave filtering circuit (17), direct current voltage-limiting protection circuit (18), mu balanced circuit (19), adjustable constant-flow circuit (20) conversion of AC power through being contained on the wiring board (3).
3, according to claim 1 and 2 described safelights, it is characterized in that exchanging voltage-limiting protection circuit (15) is at ac power input end Zinc-oxide piezoresistor (Rv in parallel
1) constitute, step-down constant-current circuit (16) is the non-polarized capacitor (C of a series connection
1) constitute, current rectifying and wave filtering circuit (17) is conventional current rectifying and wave filtering circuit (VD
1-4, C
2, C
3, R
1), direct current voltage-limiting protection circuit (18) is the Zinc-oxide piezoresistor (Rv that is connected in parallel on current rectifying and wave filtering circuit (17) output terminal
2) constitute, mu balanced circuit (19) is that parallel connection is contained in constant-current circuit (20) voltage stabilizing diode (VD before
5) constitute, adjustable constant-flow circuit (20) is that the integrated constant current tube of variable semiconductor (V) that is connected on mu balanced circuit (19) output terminal constitutes.
4, safelight according to claim 1, it is characterized in that preferably serving as a contrast with sphere curved surface reflector (10) between light emitting diode (11) back and the adjustable plate (9), light emitting diode (11) is not more than 1/8 of reflector (10) spherical diameter with the distance at reflector (10) center, light emitting diode (11) front portion is provided with transparent lamp shade (13), the core of transparent lamp shade (13) is the uneven surface of part printing opacity, two pins of light emitting diode (11) are separately fixed on the adjustable plate (9), and adjustable plate (9) is fixed in the case (6) of the band louvre (8) on the lamp bracket (4) by adjusting screw (7).
5, safelight according to claim 1 is characterized in that being connected to heat radiator (12) on (11) two pins of light emitting diode.
6,, it is characterized in that light emitting diode (11) is the light emitting diode (VD of light of only turning to be yellow according to the described safelight of claim 1 to 5
6).
7,, it is characterized in that light emitting diode (11) is the light emitting diode (VD of a green light according to the described safelight of claim 1 to 5
6).
8,, it is characterized in that light emitting diode (11) is the light emitting diode (VD that only glows according to the described safelight of claim 1 to 5
6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239139 CN2233591Y (en) | 1995-01-19 | 1995-01-19 | Safety lamp for use in darkroom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239139 CN2233591Y (en) | 1995-01-19 | 1995-01-19 | Safety lamp for use in darkroom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2233591Y true CN2233591Y (en) | 1996-08-21 |
Family
ID=33880993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95239139 Expired - Fee Related CN2233591Y (en) | 1995-01-19 | 1995-01-19 | Safety lamp for use in darkroom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2233591Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006063490A1 (en) * | 2004-12-13 | 2006-06-22 | Mowen Wang | A shading light and compensating light device of a lamp house with an internal lamp |
| WO2006066459A1 (en) * | 2004-12-23 | 2006-06-29 | Beijing Yuande Bio-Medical Engineering Co., Ltd. | A standard light source for a single photon counter |
| CN102300359A (en) * | 2010-06-25 | 2011-12-28 | 首利实业股份有限公司 | Power supply device of light emitting diode (LED) lamp |
-
1995
- 1995-01-19 CN CN 95239139 patent/CN2233591Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006063490A1 (en) * | 2004-12-13 | 2006-06-22 | Mowen Wang | A shading light and compensating light device of a lamp house with an internal lamp |
| CN100373092C (en) * | 2004-12-13 | 2008-03-05 | 王默文 | Light shielding and supplying device for luminous signs |
| WO2006066459A1 (en) * | 2004-12-23 | 2006-06-29 | Beijing Yuande Bio-Medical Engineering Co., Ltd. | A standard light source for a single photon counter |
| CN102300359A (en) * | 2010-06-25 | 2011-12-28 | 首利实业股份有限公司 | Power supply device of light emitting diode (LED) lamp |
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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 |