CN201612596U - Ultrathin visual chart lamp box - Google Patents
Ultrathin visual chart lamp box Download PDFInfo
- Publication number
- CN201612596U CN201612596U CN2010201091217U CN201020109121U CN201612596U CN 201612596 U CN201612596 U CN 201612596U CN 2010201091217 U CN2010201091217 U CN 2010201091217U CN 201020109121 U CN201020109121 U CN 201020109121U CN 201612596 U CN201612596 U CN 201612596U
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- frame
- lamp box
- visual acuity
- light
- framework
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Abstract
The utility model discloses an ultrathin visual chart lamp box which comprises a frame body as well as light sources and a light-transmitting plate which are arranged in the frame body, wherein the front surface of the light-transmitting plate is provided with a visual chart, and the back surface thereof is silk-printed with a light guide plate; the back surface of the light guide plate is provided with a reflective membrane; and the light sources are adjacently attached at two sides of the light-transmitting plate. The ultrathin visual chart lamp box can emit uniform, stable and soft light without dazzle and flash and is reduced greatly in thickness, thus having ultrathin attractive appearance.
Description
Technical field
This utility model relates to a kind of medical detection means, specifically is meant a kind of ultra-thin Visual chart lamp box for testing eyesight case apparatus clinical and health check-up detection human eyesight that is widely used in.
Background technology
Adopt that artificially lighting visual acuity chart lamp box is widely used in clinical diagnosis, fields such as mirror, health check-up are joined in optometry.All be that 10CM is thick at the visual acuity chart lamp box that uses at present, in adorn 2 common fluorescent tubes, adopt the luminous visual acuity chart lamp box of retro-illumination, technology is simple but it has significant disadvantages: one, the luminosity of daylight lamp retro-illumination is inhomogeneous, and there is stroboscopic in light, the accuracy that the table that affects one's power of vision detects; Two, fluorescent tube is short service life, change and safeguard inconvenience, and the lamp box volume is big, thick and heavy, carries inconvenience, and profile is attractive in appearance inadequately; In addition, the sighting target of traditional visual acuity chart lamp box is carried on the back down by the detected person easily, influences its accuracy.
The utility model content
The purpose of this utility model is in order to overcome the shortcoming and defect that prior art exists, and the ultra-thin visual acuity chart lamp box that a kind of thickness is little, the vision accuracy in detection is high is provided.
For achieving the above object, the technical solution of the utility model is to include framework and be arranged at intravital light source of frame and light-passing board, described light-passing board front is provided with visual acuity chart, the back side silk-screen of described light-passing board has LGP, the back side of this LGP is provided with reflective membrane, and described light source close neighbour is arranged at the both sides of light-passing board.This utility model adopts method backlight luminous, settle light source by both sides at light-passing board, and LGP and reflective membrane are set at the back side of light-passing board, the light that makes light source send shines on the visual acuity chart through LGP and reflective membrane again, therefore luminous than traditional retro-illumination, not only luminosity is even, stable, soft for this utility model, free from glare, flicker free, and thickness can greatly to reduce profile ultra-thin attractive in appearance.
Further being provided with is that described light source is three primary colours daylight lamp or LED daylight lamp.Adopt not only sufficient brightness of three primary colours daylight lamp or LED daylight lamp, and high life, and caliber is less relatively.
Further being provided with is that described framework includes the framework frame, all is provided with buckling plate rotationally on the frame around this framework frame, is provided with two ends between this buckling plate and the framework frame and is connected to elastic spring on buckling plate and the framework frame respectively.By this setting, can be convenient for changing the visual acuity chart panel, prevent from that the same secondary sighting target of visual acuity chart lamp box is long-time to use and remembered, and reduce the accuracy that detects by person to be detected.
Further setting is that the frame all around of described framework frame is provided with the circle rotation guide rail parallel with frame, and described buckling plate is provided with the rotation of circle rotation guide rail and blocks the circular rotary pawl of joining, and constitutes being rotatably assorted of buckling plate and framework frame.This setting has made things convenient for mechanism's setting.
Further setting is that the upper surface of frame all around of described framework frame is provided with caulking groove, and the medial surface of described buckling plate is provided with the embedding pawl, and the two ends of described elastic spring are inlaid in respectively on caulking groove and the embedding pawl.
Further being provided with is that described light-passing board is a poly (methyl methacrylate) plate.
The utility model has the advantages that not only luminosity is even, stable, soft, free from glare, flicker free, and be convenient for changing the sighting target of visual acuity chart, do not carried on the back down by the detected person, improved the accuracy that detects.Adopt backlight type luminous simultaneously, lamp house thickness only is 3CM.
Below in conjunction with specification drawings and specific embodiments this utility model is done further introduction.
Description of drawings
Fig. 1 this utility model specific embodiment axonometric chart;
Fig. 2 this utility model specific embodiment part buckling plate open mode figure;
Fig. 3 this utility model specific embodiment structure cutaway view;
Fig. 4 this utility model specific embodiment I portion enlarged drawing.
The specific embodiment
The specific embodiment of the present utility model shown in Fig. 1-4, include framework 1 and be arranged at light source 2 and light-passing board 3 in the framework 1, described light-passing board 3 fronts are provided with visual acuity chart 4, the back side silk-screen of described light-passing board 3 has LGP 5, the back side of this LGP 5 is provided with reflective membrane 6, described light source 2 close neighbours are arranged at the both sides of light-passing board, the rectangle frame that the described framework 1 of present embodiment is made for aluminum alloy material, described light-passing board 3 adopts non-friable poly (methyl methacrylate) plate, light source 2 described in the utility model is three primary colours daylight lamp or LED daylight lamp, it is light source 2 that present embodiment adopts three primary colours daylight lamp 2, the caliber of this three primary colours daylight lamp 2 should with light-passing board 3 fits, usually the T5 pipe is of moderate size, and caliber is preferable.In addition, consider the luminous darker reason in fluorescent tube two ends, LGP 5 has been done thickening processing near LGP 5 silk-screens of daylight lamp two-end part, make lamp box whole luminous even, brightness remains on 300-400cd/m
2
Present embodiment, described framework 1 includes framework frame 11, all be provided with buckling plate 12 rotationally on the frame around this framework frame 11, be provided with two ends between this buckling plate 12 and the framework frame 11 and be connected to elastic spring 13 on buckling plate 12 and the framework frame 11 respectively, be provided with for the ease of mechanism, and in conjunction with the forming technique that has sophisticated aluminium section bar now, frame is provided with the circle parallel with frame and rotates guide rail 111 around the described framework frame 11, described buckling plate 12 is provided with the circular guide rail 111 that rotates and rotates the circular rotary pawl 121 that card is joined, constitute being rotatably assorted of buckling plate 12 and framework frame 11, the upper surface of frame is provided with caulking groove 112 around the described framework frame 11, the medial surface of described buckling plate 12 is provided with embedding pawl 122, and the two ends of described elastic spring 13 are inlaid in respectively on caulking groove 112 and the embedding pawl 122.
This utility model adopts method backlight luminous, settle light source 2 by both sides at light-passing board 3, and LGP 5 and reflective membrane 6 be set at the back side of light-passing board 3, the light that makes light source 2 send shines on the visual acuity chart 4 through LGP 5 and reflective membrane 6 again, therefore luminous than traditional retro-illumination, not only luminosity is even, stable, soft for this utility model, free from glare, flicker free, and thickness can greatly to reduce profile ultra-thin attractive in appearance.
Claims (6)
1. ultra-thin visual acuity chart lamp box, include framework and be arranged at intravital light source of frame and light-passing board, described light-passing board front is provided with visual acuity chart, it is characterized in that: the back side silk-screen of described light-passing board has LGP, the back side of this LGP is provided with reflective membrane, and described light source close neighbour is arranged at the both sides of light-passing board.
2. ultra-thin visual acuity chart lamp box according to claim 1 is characterized in that: described light source is three primary colours daylight lamp or LED daylight lamp.
3. ultra-thin visual acuity chart lamp box according to claim 1 and 2, it is characterized in that: described framework includes the framework frame, all be provided with buckling plate rotationally on the frame around this framework frame, be provided with two ends between this buckling plate and the framework frame and be connected to elastic spring on buckling plate and the framework frame respectively.
4. ultra-thin visual acuity chart lamp box according to claim 3, it is characterized in that: frame is provided with the circle parallel with frame and rotates guide rail around the described framework frame, described buckling plate is provided with the circular guide rail that rotates and rotates the circular rotary pawl that card is joined, and constitutes being rotatably assorted of buckling plate and framework frame.
5. ultra-thin visual acuity chart lamp box according to claim 4, it is characterized in that: the upper surface of frame is provided with caulking groove around the described framework frame, the medial surface of described buckling plate is provided with the embedding pawl, and the two ends of described elastic spring are inlaid in respectively on caulking groove and the embedding pawl.
6. ultra-thin visual acuity chart lamp box according to claim 5 is characterized in that: described light-passing board is a poly (methyl methacrylate) plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201091217U CN201612596U (en) | 2010-01-28 | 2010-01-28 | Ultrathin visual chart lamp box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201091217U CN201612596U (en) | 2010-01-28 | 2010-01-28 | Ultrathin visual chart lamp box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201612596U true CN201612596U (en) | 2010-10-27 |
Family
ID=42998968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201091217U Expired - Lifetime CN201612596U (en) | 2010-01-28 | 2010-01-28 | Ultrathin visual chart lamp box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201612596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565396A (en) * | 2013-11-11 | 2014-02-12 | 苏州卫生职业技术学院 | Visual chart light box with light guide plate of submicrometer structure |
-
2010
- 2010-01-28 CN CN2010201091217U patent/CN201612596U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565396A (en) * | 2013-11-11 | 2014-02-12 | 苏州卫生职业技术学院 | Visual chart light box with light guide plate of submicrometer structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101027 |
|
| CX01 | Expiry of patent term |