CN201222159Y - Back casting apparatus - Google Patents
Back casting apparatus Download PDFInfo
- Publication number
- CN201222159Y CN201222159Y CNU2008200598123U CN200820059812U CN201222159Y CN 201222159 Y CN201222159 Y CN 201222159Y CN U2008200598123 U CNU2008200598123 U CN U2008200598123U CN 200820059812 U CN200820059812 U CN 200820059812U CN 201222159 Y CN201222159 Y CN 201222159Y
- Authority
- CN
- China
- Prior art keywords
- plate
- box frame
- projector
- fixed
- reflective mirror
- 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 - Lifetime
Links
Images
Abstract
A back projection device comprises a box type frame, a projector, a lower reflecting mirror, an upper reflecting mirror and a back projection screen which is fixed on the box type frame, wherein images which are projected by the projector are projected on the back projection screen after being reflected by the lower reflecting mirror and the upper reflecting mirror in turn, the outer surface of a back projection box is covered with shade cloth, and the legs of the box type frame are adjustable. The utility model can project rays sent from the projector to the screen from the back of the screen cloth through utilizing the plane reflecting principle of rays. Compared with other projection systems with large screens, the utility model has the advantages that the frame is assembled through adopting section bars, standard fasteners and connecting elements, which is convenient for detaching and transporting, and the position of the projector has large freedom adjusting range, thereby facilitating a back projection box system to be suitable for various projectors with different types, legs with adjustable height are provided, which can largely adjust the height of the back projection box to meet the different requirements in various places.
Description
Technical field
The utility model relates to large scale screen rear-projection technical field.
Background technology
The method that realizes large screen projection at present generally has three kinds: 1, use general projector by long projector distance; 2, use the projector of short focal wide angle camera lens; 3, use back projecting system, shorten the distance of projector to screen by the reflection of level crossing.But these three kinds of methods all have drawback separately.
Use general long-focus projector projection large scale picture, the distance between projector and screen is directly proportional with picture dimension, and projector is near more from screen, and the picture dimension that projects is more little, otherwise then picture is big more.If projector space is also little, but needs to show a bigger picture again, just have to projector is placed on the space backmost, perhaps nonetheless can not satisfy the requirement of user to picture dimension.Light can project to the speaker on the face if the speaker indicates when explanation before screen, on the health, allows the speaker do not feel like oneself, and speaker's health often shelters from light, can have influence on watching of following people.
If projection large scale picture just needs to select the projector of short focal wide angle camera lens in short-range.There has been at present the projector of wide-angle lens to can be implemented in one meter the interior picture that throws 60 inches of distance.But such projector costs an arm and a leg, and is not suitable for promoting the use of of general occasion.
And realize that by the rear-projection case rear-projection case system bulk of large scale projection is excessive, not easy to assemble and carrying.
The utility model content
At above-mentioned technical matters, the utility model provides a kind of back projection device.
The utility model adopts following technical scheme:
A kind of back projection device, it is characterized in that comprising: box frame, be fixed in the projector in the box frame, following reflective mirror and last reflective mirror, and and be fixed in the rear-projection curtain of box frame side, the image of described projector projection projects on the rear-projection curtain after the reflection of following reflective mirror and last reflective mirror successively, the outside surface of described rear-projection casing also is coated with gobo, and the leg of described box frame is a burr adjustable tail margin.
As another improvement of the present utility model, also comprise the framework peace sealing groove bar of being located on the described box frame, described framework is provided with the groove that is complementary with described flat sealing groove bar, and four limits of described rear-projection curtain are pressed through described flat sealing groove bar and are located in the groove of described framework.
One improve again as of the present utility model, also comprise installing plate, described box frame comprises horizontal stripe, described installing plate is fixed on the horizontal stripe of described box frame, described projector is fixed on the described installing plate, described installing plate bottom is fixed in described projector, and described installing plate and bearing of described projector are provided with horizontal adjustment groove, and the bearing of the horizontal stripe of described installing plate and described box frame is provided with vertical elongated slot.
The utility model utilizes the plane reflection principle of light, and the light coming from projector projects on the screen from the curtain back side.It has the following advantages with respect to other broad screen projective system:
1, framework adopts section bar and standard fasteners, web member assembling, easy disassembly and transportation;
2, there is the setting range of big degree of freedom the position of projector, makes same rear-projection case system can be suitable for the projector of multiple model;
3, the adjustable height lower margin is housed, makes the height of rear-projection case that bigger adjustable extent be arranged, satisfy the needs of various occasions.
Description of drawings
Fig. 1 the utility model back projection device structural drawing
The clamping of Fig. 2 rear-projection curtain
The position of Fig. 3 projector is adjusted and fixed mechanism
The adjustment of catoptron and fixed sturcture under Fig. 4
The adjustment of Fig. 5 upper reflector and fixed sturcture
Embodiment
A kind of back projection device, comprise: box frame 1, be fixed in the projector 2 in the box frame 1, following reflective mirror 3 and last reflective mirror 4, and and be fixed in the rear-projection curtain 5 of box frame 1 side, the image of described projector 2 projections projects on the rear-projection curtain 5 after reflective mirror 3 and last reflective mirror 4 reflect down successively.Can realize making projector 2 generally to shorten to 1/2nd to 1/3rd of normal projection's distance, save the space effectively to the distance of rear-projection curtain 5.The outside surface of described rear-projection casing 1 also is coated with gobo, can realize good drop shadow effect.The leg of described box frame 1 is a burr adjustable tail margin 6.
As shown in Figure 2, also comprise the framework 51 peaceful sealing groove bars of being located on the described box frame 1 52, described framework 51 is provided with the groove that is complementary with described flat sealing groove bar 52, and four limits of described rear-projection curtain 5 are pressed through described flat sealing groove bar 52 and are located in the groove of described framework 51.The mode clamping rear-projection curtain 5 that adopts flat sealing groove bar 52 to be pressed into has not only made things convenient for installation, can guarantee the flatness of curtain integral body simultaneously again, has guaranteed the quality of projected picture to greatest extent.
The concrete mounting structure of described projector 2 as shown in Figure 3, comprise installing plate 21, described box frame 1 comprises horizontal stripe, described installing plate 21 is fixed on the horizontal stripe of described box frame 1, projector 2 is fixed on the described installing plate 21, present embodiment adopts the mode of upside-down mounting, and promptly described installing plate 21 bottoms are fixed in projector 2, are lifted on the fixed head 21.Because whether the installation site of projector 2 accurately has direct influence to the quality of projected picture, but because mismachining tolerance inevitable, thereby the installation site of projector 2 needs the modulability of degree of freedom all around.Installing plate 21 is provided with horizontal adjustment groove 24 with 2 bearings of projector, is convenient to projector 2 and moves laterally when debugging, tightens fixing after adjustment finishes by trip bolt.Described installing plate 21 is provided with vertical elongated slot 23 with the bearing of the horizontal stripe of described box frame 1, is convenient to projector 2 and vertically moves when debugging, equally holding screw 22 is screwed after adjustment finishes.
The concrete mounting structure of described reflective mirror 3 down as shown in Figure 4, comprise and be located at described two link plates 4 of reflective mirror 3 both sides down, and be fixed in two upper ear plate 34 and lower ear plates 35 on the link plate 4, described box frame 1 comprises horizontal stripe, described two link plates 4 are fixed on the horizontal stripe of described box frame 1, the described two ends of reflective mirror 3 down are individually fixed between described upper ear plate 34 and the lower ear plate 35, the corresponding position is respectively equipped with through hole on described upper ear plate 34 and the described link plate 4, and described upper ear plate 34 is connected by little axle with described link plate 4.On the described lower ear plate 35 regulating tank is arranged, be used for regulating down reflective mirror 3 reflection angles, screw screw 36 after adjusting finishes.The bearing of two link plates 4 and described box frame 1 horizontal stripe is provided with horizontal adjustment groove 32, screws respective screws 33 after adjustment finishes.Can realize the adjustment of small reflector lateral attitude by two lateral adjustments grooves 32, and, realize the angular setting of time catoptron 3 around described little axle rotation.
The concrete mounting structure of described upward reflective mirror 4 as shown in Figure 5.Comprise and be located at described four link plates going up reflective mirror 4 both sides, every side has upper hanging plate 41 and following link plate 42, and be fixed in four upper ear plate 43 and lower ear plates 44 on the link plate, upper hanging plate 41 and following link plate 42 are individually fixed on the horizontal stripe and vertical bar in described box frame 1 upper right corner, described two ends of going up reflective mirror 4 are individually fixed between described upper ear plate 43 and the lower ear plate 44, the corresponding position is respectively equipped with through hole on described upper ear plate 43 and the described upper hanging plate 41, and described upper ear plate 43 is connected by little axle with described upper hanging plate 41.One regulating tank 45 is arranged on the described lower ear plate 44, be used for regulating reflective mirror 4 reflection angles, screw screw 46 after adjusting finishes.Wherein, described upper hanging plate 41 and following link plate 42 are fixed on the described box frame 1 by threaded hole, described upper hanging plate 41 and following link plate 42 can be used as rack connecting plate simultaneously and use except playing regulating action, have strengthened the intensity of junction, described box frame 1 turning.
Claims (5)
1, a kind of back projection device, comprise box frame, it is characterized in that, be fixed in the projector in the box frame, following reflective mirror and last reflective mirror, and and be fixed in the rear-projection curtain of box frame side, the image of described projector projection projects on the rear-projection curtain after the reflection of following reflective mirror and last reflective mirror successively, and the outside surface of described rear-projection casing also is coated with gobo, and the leg of described box frame is a burr adjustable tail margin.
2, back projection device as claimed in claim 1, it is characterized in that, also comprise the framework peace sealing groove bar of being located on the described box frame, described framework is provided with the groove that is complementary with described flat sealing groove bar, and four limits of described rear-projection curtain are pressed through described flat sealing groove bar and are located in the groove of described framework.
3, back projection device as claimed in claim 1, it is characterized in that, also comprise installing plate, described box frame comprises horizontal stripe, described installing plate is fixed on the horizontal stripe of described box frame, and described projector is fixed on the described installing plate, and described installing plate bottom is fixed in described projector, described installing plate and bearing of described projector are provided with horizontal adjustment groove, and the bearing of the horizontal stripe of described installing plate and described box frame is provided with vertical elongated slot.
4, back projection device as claimed in claim 1, it is characterized in that, also comprise and be located at described two link plates of reflective mirror both sides down, and be fixed in two upper ear plate and lower ear plates on the link plate, described box frame comprises horizontal stripe, described two link plates are fixed on the horizontal stripe of described box frame, the described two ends of reflective mirror down are individually fixed between described upper ear plate and the lower ear plate, the corresponding position is respectively equipped with through hole on described upper ear plate and the described link plate, described upper ear plate is connected by little axle with described link plate, one regulating tank is arranged on the described lower ear plate, and the bearing of two link plates and described box frame horizontal stripe is provided with horizontal adjustment groove.
5, back projection device as claimed in claim 1, it is characterized in that, also comprise and be located at described four link plates going up the reflective mirror both sides, every side has upper hanging plate and following link plate, and be fixed in four upper ear plate and lower ear plates on the link plate, described upper hanging plate and following link plate are individually fixed on the horizontal stripe and vertical bar in the described box frame upper right corner, described two ends of going up reflective mirror are individually fixed between described upper ear plate and the lower ear plate, the corresponding position is respectively equipped with through hole on described upper ear plate and the described upper hanging plate, described upper ear plate is connected by little axle with described upper hanging plate, and a regulating tank is arranged on the described lower ear plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200598123U CN201222159Y (en) | 2008-06-17 | 2008-06-17 | Back casting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200598123U CN201222159Y (en) | 2008-06-17 | 2008-06-17 | Back casting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222159Y true CN201222159Y (en) | 2009-04-15 |
Family
ID=40575665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200598123U Expired - Lifetime CN201222159Y (en) | 2008-06-17 | 2008-06-17 | Back casting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201222159Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749798A (en) * | 2012-07-11 | 2012-10-24 | 南京美乐影视科技有限公司 | Back projection reflecting system fixing device |
| CN102998887A (en) * | 2011-09-16 | 2013-03-27 | 株式会社理光 | Image projection apparatus |
| CN103091946A (en) * | 2011-11-04 | 2013-05-08 | 株式会社理光 | Image projection apparatus |
| CN104991412A (en) * | 2015-08-13 | 2015-10-21 | 白衡 | Ultrashort-focus projecting device |
-
2008
- 2008-06-17 CN CNU2008200598123U patent/CN201222159Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998887A (en) * | 2011-09-16 | 2013-03-27 | 株式会社理光 | Image projection apparatus |
| US8985786B2 (en) | 2011-09-16 | 2015-03-24 | Ricoh Company, Limited | Image projection apparatus |
| CN102998887B (en) * | 2011-09-16 | 2015-06-17 | 株式会社理光 | Image projection apparatus |
| US9274409B2 (en) | 2011-09-16 | 2016-03-01 | Ricoh Company, Ltd. | Image projection apparatus |
| CN103091946A (en) * | 2011-11-04 | 2013-05-08 | 株式会社理光 | Image projection apparatus |
| US9052580B2 (en) | 2011-11-04 | 2015-06-09 | Ricoh Company, Limited | Outer housing for an image projection apparatus |
| CN103091946B (en) * | 2011-11-04 | 2015-08-12 | 株式会社理光 | Image projection device |
| CN102749798A (en) * | 2012-07-11 | 2012-10-24 | 南京美乐影视科技有限公司 | Back projection reflecting system fixing device |
| CN104991412A (en) * | 2015-08-13 | 2015-10-21 | 白衡 | Ultrashort-focus projecting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101196675B (en) | Projector | |
| CN201222159Y (en) | Back casting apparatus | |
| CN204631432U (en) | Projector | |
| JPH10319501A (en) | Rear projection monitor | |
| CN202995234U (en) | Irradiation position adjustable projector | |
| CN101303513B (en) | Compact type back projecting system easy to regulate | |
| CN104991412B (en) | Ultrashort out-of-focus projection device | |
| EP1074964B1 (en) | Improved monitor applicable to sports stadiums | |
| JPS5944181A (en) | Projecting television system | |
| CN207249340U (en) | Parallel projection device | |
| CN202956578U (en) | Rotating bracket of dome camera | |
| CN201955604U (en) | DLP (digital light processing) large-screen projection box | |
| CN210573161U (en) | Projection arrangement is used in animation show | |
| CN210716669U (en) | LED display screen back frame assembly | |
| CN2543303Y (en) | Detecting device of image correction for projector equipment | |
| CN201233496Y (en) | Front maintaining back projection splicing wall | |
| CN209358678U (en) | A kind of dmd chip angle adjuster | |
| CN102096284A (en) | Single chip liquid crystal projector | |
| JP4623362B2 (en) | wall | |
| CN216485956U (en) | Rear projection type projection display device | |
| CN201917769U (en) | Improved reflecting mirror four corner adjusting device | |
| CN211375296U (en) | Reflective interactive projector | |
| CN215067489U (en) | Device for quickly adjusting reflector of projection lighting system | |
| CN218850846U (en) | Interactive projection table | |
| CN216052590U (en) | CAVE display system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090415 |