CN2921895Y - Portable projection screen - Google Patents
Portable projection screen Download PDFInfo
- Publication number
- CN2921895Y CN2921895Y CNU2004900000406U CN200490000040U CN2921895Y CN 2921895 Y CN2921895 Y CN 2921895Y CN U2004900000406 U CNU2004900000406 U CN U2004900000406U CN 200490000040 U CN200490000040 U CN 200490000040U CN 2921895 Y CN2921895 Y CN 2921895Y
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- links
- support bar
- low
- joint
- curtain
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- Expired - Fee Related
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Telephone Set Structure (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
A surface of a substrate is coated with a mixture of substantially planar irregular shaped pigments and a clear non-colored adhesive liquid. The pigments are efficient in both reflection (off the substantially planar surface) and refraction (from the irregular shaped edges). The substrate is coated, such that wash outs do not occur due to white or grey color in the coating or screen surface. A glare reducing material can be mixed in with the coating, which both reflects and refracts light, or the material can be applied as a separate layer.
Description
Technical field
What the present invention related to is the portable translucent curtain, and the characteristics of this projection screen are: stability is good, and the A-frame by a uniqueness links to each other with the curtain body, without any rocking.
Background technology
Illustrate: (as same projection TV) hints obliquely at by projector, and picture is hinted obliquely at, is deployed on the giant-screen, is convenient to spectators and appreciates.By material texture structure, papery, that artificial resin etc. is formed, it has good projection function to screen surface by one deck.A projection screen that has good quality need possess following condition: the video of projection is clear, the color gentleness, and the video equilibrium, light is even, and direction is coordinated or the like.At present general in the industry projection screen all hangs on ceiling or the wall, with the time just curtain is pulled out.Such projection screen shortcoming is, should not carry, and it must be fixed on certain location.
In order to overcome this problem, we have invented a kind of bracket with foldable curtain, place one to have on the three-legged support of support bar screen.Certain this device uses also its inconvenience, is not easy to take, and because of need are hung on it on wall or when placing on the A-frame, and this support bar is also heavier, also is inconvenient to carry.And the another one problem is when taking, and screen is easy to be wrinkled or damage.
The lifting of controlling screen by the elastic force that uses gas lift unit or spring has solved this difficult problem.That is to say that we have increased this device of eidograph in the projection case, in detail with reference to figure one.This figure has marked the principle of work of this projection screen in detail.
With reference to figure one, portable translucent screen device comprises: (300) screen box, and several supports joint 310,311,312 forms one " X " shape dexterously, as pantograph and semicircle metal holder (h); The pole (330) on curtain (400) top places the top in support joint 310,311,312.Curtain face bottom links to each other with screen box (300).Simultaneously, a pair of blade face spring (320) is housed on the screen box (300), make central bracket (310) closely link to each other with screen box (300), the bottom of gas lift unit or spring (350) fixes by semicircle metal holder (h) and central bracket (310) respectively, and spring subsidy joint piece (311) can produce elastic force up or down.
In the above-mentioned portable translucent screen device structure, from screen box (300) (330) pole that upwards stretches, by the elastic force that gas lift unit or spring (350) produce, the A-frame that support joint 310,311,312 is formed will launch dexterously automatically, thereby makes whole curtain face launch.
In other words portable translucent screen device is exactly the A-frame that utilizes support joint 310,311,312 to form, and the elastic force that produces by spring (350) slowly launches, and curtain face (400) also launches thereupon.Certainly, also unavoidably there is the shortcoming of self in this device, if that elastic force dynamics that to be exactly spring (350) produce is not enough, a curtain face just can not launch fully.And, have only projection screen
When the position of putting was enough high, the curtain face could launch fully.
Summary of the invention
The screen industry development so far, we have also run into various problems in the process of use, in order to overcome these difficult problems, we send out draw curtain legibly, purpose is that to produce a kind of stability relatively good, and the A-frame by a uniqueness links to each other with the curtain body, without any the novel product that rocks.Portable translucent curtain (draw curtain), its primary structure comprises:
curtain box: lid is controlled opening and drawing in of curtain;
The turning axle; Have certain elasticity and rotatable, be fixed in act box;
curtain face: the bottom links to each other with turning axle, and the top links to each other with pole;
The A-frame: the top is by semicircle metal holder and pole center fixed, and the bottom is connected with the fixture of curtain box central authorities;
1. the short and low support bar in an end of the long and low support bar in left side and right side links to each other;
2. the short and low support bar in left side and the weak point of tail end and low support bar fix on act fixture of box central authorities by hinges fixing.
3. the support bar that an end in left central bracket joint and left side another one are long and low links to each other, an end in right median support joint with grow by the side another one and low support bar links to each other;
4. an end in upper right short support joint links to each other with an end in left central bracket joint, and an end in upper left short support joint links to each other with an end in right median support joint;
5. right flat lateral connector bar one end is lacked with the left side and low support bar links to each other, and an other end links to each other with the middle part in right median support joint;
6. left flat lateral connector bar one end is lacked with the right side and low support bar links to each other, and an other end links to each other with the middle part in left central bracket joint;
7. the short and low pole in left side is grown with the right side with the tie point of right flat lateral connector bar and an end of low support bar, and is continuous by a spring;
8. the short and low pole in right side is grown with the left side with the tie point of left flat lateral connector bar and the other end of low support bar, and is continuous by another spring;
Right laterally connecting link is fixed on the position of right median support, and the position that left laterally connecting link is fixed on left central bracket needs symmetrically.And the right laterally connecting link position that is fixed on the right median support links to each other with left and right sides central bracket and the tie point coincidence of the support bar central authorities that the right side is long and low.
Portable translucent curtain (draw curtain) also comprises a hook that directly links to each other with the three-legged support upper bracket, is fixed on the pole of top.This hook directly links to each other with top pole, comprises two plugs that link to each other and oppose mutually by latch; The spring of compression: the injection moulding handle is connected to second plug rear side, and the spring with compression is joined together dexterously then.And the injection moulding handle is consistent with latch direction, closely links to each other with hook by another latch; Semicircle aluminium bar is convenient to install the pole aluminum pipe, makes that pole and hook are fixing.
Description of drawings
Fig. 1: the structure that has elaborated the portable translucent curtain is formed;
Fig. 2:, illustrate the principle of work of portable translucent curtain in detail according to present invention;
Fig. 3 is the decomposition diagram of junction, portable translucent curtain bottom among Fig. 2;
Fig. 4 is the decomposition diagram of portable translucent curtain pole terminal part junction among Fig. 2;
Fig. 5 is the decomposition diagram of the middle junction of portable translucent curtain pole among Fig. 2;
Fig. 6 is that the screen of portable translucent curtain A-frame junction launches skeleton view among Fig. 2;
Fig. 7 is that skeleton view is shunk in the screen of portable translucent curtain A-frame junction among Fig. 2;
Fig. 8 is the decomposition diagram of portable translucent curtain top hook member among Fig. 2.
Embodiment
Hereinafter Biao Shu invention will be introduced in detail with reference to the chart of enclosing.
The portable translucent curtain, its primary structure comprises:
Screen box 100: opening and drawing in by lid 101 control curtains;
Turning axle 110: have certain elasticity and rotatable, be fixed in the screen box 100;
Curtain face 120: the bottom links to each other with turning axle 110, and the top links to each other with pole 121;
A-frame: the top is by semicircle metal holder h and pole 121 center fixed, and the bottom is connected with the fixture 104 that places act box 100 central authorities, as shown in Figure 2;
The connection of A-frame:
A. long and low support bar 130 on the left of; Short and the low support bar 140 in right side; Short and the low support bar 150 in left side; And the back is short and low support bar is fixed on act fixture of box central authorities 104 by semicircle metal holder h.
One end of the support bar 130 that one end in b. left central bracket joint 210 and left side another one are long and low links to each other.
C. an end of the support bar 160 that an end in right median support joint 220 and right side another one are long and low links to each other;
One end in d. upper right short support joint 240 links to each other with an end in left central bracket joint 210;
One end in e. upper left short support joint 230 links to each other with an end in right median support joint 220;
One end of f. right laterally connecting link 170 is lacked with the left side and low support bar 150 links to each other, and an other end links to each other with the middle part in right median support joint 220;
One end of g. left laterally connecting link 180 is lacked with the right side and low support bar 140 links to each other, and an other end links to each other with the middle part in left central bracket joint (210);
H. the end of the long and low support bar (160) in the tie point of the short and low pole (150) in left side and right laterally connecting link (170) and right side is continuous by a spring (200);
I. the horizontal end of the long and low support bar (130) in tie point and the left side of connecting link (180) in the short and low pole (140) in right side and a left side is continuous by another spring (190);
In other words, link to each other by semicircle metal holder (h) between the A-frame pole, support whole curtain (120), the stability of curtain like this, agile property is all relatively good, and convenient use.During above-mentioned portable translucent curtain (draw curtain) was introduced, a curtain box (100) being opened and being drawn in by lid (101) control curtain; Turning axle (110) has certain elasticity and rotatable, is fixed in act box (100); Curtain face (120) bottom links to each other with turning axle (110), and the top links to each other with pole (121), and it is the same disposing with general portable translucent curtain (draw curtain).On the curtain box (100) ground draw curtain foot pad (102) might be housed also, and also have an injection moulding handle (103) on the curtain lid (101), be convenient for carrying.
The three-legged support design makes that curtain face (120) is in use more stable, more convenient use.Its main number of assembling steps is:
A. long and low support bar (130) on the left of; Short and the low support bar (140) in right side; Short and the low support bar (150) in left side; And the back is short and low support bar is fixed on act fixture of box central authorities (104) by semicircle metal holder (h).
One end in b. left central bracket joint (210) is grown with the left side another one and low support bar (130) links to each other.
C. the support bar (160) that an end of right median support joint (220) and right side another one are long and low links to each other;
One end in d. upper right short support joint (240) links to each other with an end in left central bracket joint (210);
One end in e. upper left short support joint (230) links to each other with an end in right median support joint (220);
One end of f. right laterally connecting link (170) is lacked with the left side and low support bar (150) links to each other, and an other end links to each other with the middle part in right median support joint (220);
One end of g. left laterally connecting link (180) is lacked with the right side and low support bar (140) links to each other, and an other end links to each other with the middle part in left central bracket joint (210);
H. the end of the long and low support bar (160) in the tie point of the short and low pole (150) in left side and right laterally connecting link (170) and right side is continuous by a spring (200);
I. the horizontal end of the long and low support bar (130) in tie point and the left side of connecting link (180) in the short and low pole (140) in right side and a left side is continuous by another spring (190);
In the interconnective process, long and the low support bar (130) in left side, short and the low support bar (140) in right side, left side weak point and the low low support bar of support bar (150) and right side are fixed on the tripod central shaft fixture (104) of act box central authorities by semicircle metal holder, long and the low support bar (130) in left side, short and the low support bar (140) in right side, the tie point of the support bar (160) that support bar (150) that the left side is short and low and right side are long and low is consistent, all be positioned at act box central authorities' fixture (104) pin holes (105) and locate, shown in figure three.Long and the low support bar (130) in left side, the short and low support bar (140) in right side, all there is a hole at the two ends of the support bar (160) that support bar (150) that the left side is short and low and right side are long and low.In first hole (105) on gim peg (106) the insertion tripod central shaft (104), long and the low support bar (130) in left side, short and the low support bar (140) in right side, support bar (150) that the left side is short and low and right side length and low support bar (160) just have been fixed on the tripod central shaft (104).Therefore, definite position, frame bottom junction is that tripod central shaft (104) is upward located in first hole (105), and like this, curtain just can vertically stretch, shrink freely.
The other end of the support bar (130) that the left side is long and low links to each other with an end in left central bracket joint (210) and can realize by following method:
Shown in figure four: second hole (132) located to bore in pole (130) the outstanding position (131) long and low in the left side, the 3rd hole (213) located to bore in the position (212) that central bracket joint, a left side (210) one distal process go out, the outstanding position (131) of support bar (130) long and low on the left of the place (212) that left central bracket joint (210) one distal process are gone out is inserted into is then located, and then second gim peg (133) is inserted into second, third hole (132), (213) lining respectively.
A carbine (191) of second spring (190) links to each other with second gim peg (133), and spring is fixed on the there.Long and low support bar (160) other end in right side with can pass through shown in the figure four the linking to each other of an end in right median support joint (220), same mode realizes, certain connection that does not comprise spring.In like manner an end in upper right short support joint (240) can be linked to each other with an end in left central bracket joint (210); One end in upper left short support joint (230) links to each other with an end in right median support joint (220); One end of right laterally connecting link (170) is lacked with the left side and low support bar (150) links to each other; One end of the horizontal connecting link (180) in a left side is lacked with the right side and low support bar (140) links to each other.
The other end of realizing the horizontal connecting link (180) in a left side links to each other with left central bracket joint (210) one ends, can pass through following manner: shown in figure five: be fixed in the web member (211) on the left central bracket joint (210), the 4th hole bored at position (214) outstanding in the middle of it, a left side is the 5th hole of the terminal brill of connecting link (180) laterally, end with the horizontal connecting link in a left side (180) is inserted into the place (214) of giving prominence in the middle of the web member (211) then, four (215), five (181) two hole sizes want consistent, and the 3rd gim peg (216) is inserted into four (215) simultaneously, the inside, five (181) two holes is gone.Use the same method, an end of the horizontal connecting link in the right side (170) is linked to each other with the middle part in right median support joint (220).
Simultaneously, be stretched over certain height in order to guarantee curtain, the end of the support bar (160) that the tie point of support bar (150) that the left side is short and low and right laterally connecting link (170) and right side are long and low links to each other by a spring (200); The end of the support bar (130) that the tie point of the horizontal connecting link (180) of a pole (140) that the right side is short and low and a left side and left side are long and low links to each other by another spring (190); The direction of two springs is opposite, is convenient to produce a pair of opposite effect power, and control is flexible, prevents the support bar (130) that the left side is long and low and the right side is long and low support bar (160) departs from the centre position.Just the elastic force that produces by short and low pole (140) the going up in right side couples together left side length and low support bar (130), same reason, the end of the support bar (160) that the right side is long and low is lacked with the left side and an end of low support bar (150) links to each other, so just can avoid support bar (130), (160) between subtended angle excessive, make a curtain body can be fixed on certain height.(in detail referring to figure six)
Spring (200) and (190) are passed from lateral strut (170), (180), can prevent the damage of spring effectively, and this also is a big characteristic of portable translucent curtain (draw curtain).And the interface of each support junction is " ∏ " shape (can consult the interface shape of horizontal connecting link (180) two ends, left side correspondence among the figure five).When portable translucent curtain (draw curtain) was folding, its agile property was relatively good, and whole like this tripod just is easy to shrink (as figure seven).Moreover, spring (200) and (190) intersect and link to each other with left and right sides lateral strut (170), (180) respectively.
The height that curtain face (120) uses is fixed.Shown in Fig. 6,7, when the curtain face launched, the subtended angle between support bar (130), (160) reduced, otherwise when drawing curtain in, this subtended angle increases.Certainly, the definite extension degree of support bar (130), (160) that is the size of subtended angle are also fixed.Spring (200), (190) interact, and produce a pair of equal and opposite in direction, the equilibrant that direction is opposite, and this just is achieved.Left and right sides lateral strut (170), (180) also are to form by same principle design.The contact in horizontal connecting link (170) in the right side and right median support joint (220), the contact in horizontal connecting link (180) in a left side and left central bracket joint (210), these two contacts will be symmetrically.In order to accomplish this point, the a pair of equilibrant that spring (200), (190) produce, act on support bar (130), (160), same reason, the a pair of equilibrant that spring (200), (190) produce acts on left and right sides lateral strut (180) and (170) simultaneously, be fixed up in the position one of these four poles like this, and these two contacts naturally just symmetrically.
Right laterally connecting link (170) can come to determine (with reference to Fig. 6) like this with the connecting point position in right median support joint (220): right side length and low support bar (160) parallel with left central bracket joint (210), right median support joint (220) is vertical respectively at these two poles, and being clipped in pole (160) so promptly is the connecting point position of pole (170) and (220) with (210) centre position partly.The a pair of equilibrant that produces of spring (200), (190) simultaneously acts on support bar (130), (160), left and right sides lateral strut (180) and (170), is fixed.
Hook (250) directly links to each other with A-frame top, pole (121).Stretch and link up with (250), A-frame launches, and curtain (120) also is deployed into certain height thereupon.Hook is linked to each other with the A-frame of unique design, can guarantee that curtain (120) launches fully, and improve its stability, without any rocking (as Fig. 8).The parts that hook comprises have: link to each other and mutual plug (251), (252) that oppose by latch (253); The spring (254) of compression, injection moulding handle (255) is connected to plug (252) rear side, is joined together dexterously with the spring (254) that compresses.And injection moulding handle (255) is consistent with latch (253) direction, closely links to each other with hook by latch (256); Semicircle aluminium bar (257) is convenient to install pole aluminum pipe (121), makes that pole and hook are fixing.
Hook (250) upwards stretches, curtain is opened, injection moulding handle (255) pushes mutually with semicircle aluminium bar (257), the three-legged support top, upper left short support joint (230) is separated from each other with two plugs (251), (252) in upper right short support joint (240), and upper left short support joint (230) just is easy to automatic adjusting with the angle in upper right short support joint (240).If want to readjust the height of A-frame, method is also very simple: utilize the spring place the compression that latch (253) locates, by plug (252) extruding plug (251), make two plugs push mutually, produce friction force, make injection moulding handle (253) separate with it.The subtended angle in upper left so short support joint (230) and upper right short support joint (240) just has been unlikely to too big or is too little.
The production technology practicality
Portable projection screen (draw curtain), stability is better utilized this special tectonic of A-frame, without any rocking.
The present invention this paper has done detailed explaining illustration, but except with the restriction that does not have other requirement of paying, only otherwise Exceed the restriction of content of the present invention and main marrow, we welcome with open arms the insider and propose valuable suggestion for revision.
Claims (5)
1, portable translucent curtain is characterized in that:
Screen box: opening and drawing in by lid control curtain;
Turning axle: have certain elasticity and rotatable, be fixed in the screen box;
The curtain face: the bottom links to each other with turning axle, and the top links to each other with pole;
A-frame: top and pole middle part links to each other, bottom and fixing on the fixture of screen box central authorities by hinges fixing;
In the A-frame structure: the long and low support bar in left side, the short and low support bar in right side, the short and low support bar in left side, and the back is short and low support bar fixes on act fixture of box central authorities by hinges fixing; One end in central bracket joint, a left side is grown with the left side another one and low support bar links to each other; One end in right median support joint is grown with the right side another one and low support bar links to each other; One end in upper right short support joint links to each other with an end in left central bracket joint; One end in upper left short support joint links to each other with an end in right median support joint; One end of right laterally connecting link is lacked with the left side and low support bar links to each other, and an other end links to each other with the middle part in right median support joint; One end of the horizontal connecting link in a left side is lacked with the right side and low support bar links to each other, and an other end links to each other with the middle part in left central bracket joint; The end of the support bar that the tie point of pole that the left side is short and low and right laterally connecting link and right side are long and low links to each other by a spring; The end of the support bar that the tie point of the horizontal connecting link of a pole that the right side is short and low and a left side and left side are long and low links to each other by another spring.
2, portable translucent curtain as claimed in claim 1 is characterized in that: the contact in right laterally connecting link and right median support joint, and the contact in horizontal connecting link in a left side and left central bracket joint, these two contacts will be symmetrically.
3, portable translucent curtain as claimed in claim 2, it is characterized in that: be clipped in the long and low support bar in right side and the right median support joint in left central bracket joint, the centre position of this pole promptly is the connecting point position in right laterally connecting link and right median support joint, and same method can be determined the connecting point position in horizontal connecting link of bottom left and left central bracket joint.
4, portable translucent curtain as claimed in claim 1, it is characterized in that: the top of portable translucent curtain also is provided with a hook, mainly consists of: link to each other and mutual two plugs that oppose by a latch; The injection moulding handle links to each other with second plug rear side, be joined together with the spring that compresses dexterously, and the injection moulding handle is consistent with a latch direction again, closely links to each other with hook by another latch; Semicircle aluminium bar is convenient to install the pole aluminum pipe, makes that pole and hook are fixing.
5, portable translucent curtain as claimed in claim 4 is characterized in that: the top hook of portable translucent curtain directly links to each other with top pole; Two A-frame side's aluminium are fixed in the hook face-to-face by a latch, and hook is embedded with plastic spacer to reduce friction; The spring of one compression makes it closely link to each other with second square Al rod for the support end provides elastic force; One end of this spring fastens mutually with reference axis, and whole A-frame end then couples together by another hinge handle and pole; Simultaneously, a rivet is fixed the support body, and like this, whole A-frame just has been connected as a single entity tightly in the curtain body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2004-0002767U KR200348134Y1 (en) | 2004-02-05 | 2004-02-05 | Portable screen device |
| KR2020040002767 | 2004-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2921895Y true CN2921895Y (en) | 2007-07-11 |
Family
ID=34836666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004900000406U Expired - Fee Related CN2921895Y (en) | 2004-02-05 | 2004-02-10 | Portable projection screen |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR200348134Y1 (en) |
| CN (1) | CN2921895Y (en) |
| WO (1) | WO2005076071A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455587A (en) * | 2010-10-29 | 2012-05-16 | 深圳市白雪投影显示技术有限公司 | Floor standing screen |
| CN110456605A (en) * | 2019-08-23 | 2019-11-15 | 广州市雄云视听设备有限公司 | Projection screen equipped with elastic bottom bar assembly |
| CN110647003A (en) * | 2019-09-29 | 2020-01-03 | 深圳市火乐科技发展有限公司 | Curtain lifting mechanism and projection equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015117480A1 (en) * | 2015-10-14 | 2017-04-20 | Modus Product Design Gmbh | presentation device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB779722A (en) * | 1955-06-20 | 1957-07-24 | John Michael Denton | Improvements in projection screens |
| KR0167030B1 (en) * | 1995-05-25 | 1999-03-30 | 김종태 | Upright rise/fall screen |
| JP3385207B2 (en) * | 1997-09-05 | 2003-03-10 | 泉株式会社 | Portable screen |
| JP3093127U (en) * | 1998-08-20 | 2003-04-18 | 泉株式会社 | Portable screen |
| JP3081027U (en) * | 2001-04-12 | 2001-10-19 | 株式会社シネマ工房 | Folding screen |
-
2004
- 2004-02-05 KR KR20-2004-0002767U patent/KR200348134Y1/en not_active IP Right Cessation
- 2004-02-10 WO PCT/KR2004/000264 patent/WO2005076071A1/en active Application Filing
- 2004-02-10 CN CNU2004900000406U patent/CN2921895Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455587A (en) * | 2010-10-29 | 2012-05-16 | 深圳市白雪投影显示技术有限公司 | Floor standing screen |
| CN110456605A (en) * | 2019-08-23 | 2019-11-15 | 广州市雄云视听设备有限公司 | Projection screen equipped with elastic bottom bar assembly |
| CN110456605B (en) * | 2019-08-23 | 2024-03-12 | 广州市雄云视听设备有限公司 | Projection screen with elastic bottom rod assembly |
| CN110647003A (en) * | 2019-09-29 | 2020-01-03 | 深圳市火乐科技发展有限公司 | Curtain lifting mechanism and projection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005076071A1 (en) | 2005-08-18 |
| KR200348134Y1 (en) | 2004-05-03 |
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| 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: 20070711 |