CN202050490U - Screen fixing device - Google Patents
Screen fixing device Download PDFInfo
- Publication number
- CN202050490U CN202050490U CN2011201589195U CN201120158919U CN202050490U CN 202050490 U CN202050490 U CN 202050490U CN 2011201589195 U CN2011201589195 U CN 2011201589195U CN 201120158919 U CN201120158919 U CN 201120158919U CN 202050490 U CN202050490 U CN 202050490U
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- CN
- China
- Prior art keywords
- screen
- fixing spring
- fixed
- fixing device
- spring
- 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 - Fee Related
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- Overhead Projectors And Projection Screens (AREA)
Abstract
The utility model discloses a screen fixing device. connecting sheets are fixedly mounted at the edge of a screen; the connecting sheets are respectively provided with a fixed spring; the fixed springs are fixed on a screen framework; the arrangement of the fixed springs leads the fixing device to have certain tension force on the screen at any time to keep the flatness of the screen; meanwhile, the tension of the fixed springs can be adjusted and controlled; therefore, the screen can not be damaged as receiving over-large tension in case of contraction caused by cold.
Description
Technical field
The utility model relates to a kind of fixture, relates in particular to a kind of screen fixture.
Background technology
Preventing optical projection television generally uses screen imaging, and it is optical microstructures screen or the diffuser screen that base material is made that preventing optical projection television screen commonly used at present adopts the acrylic acid resin plate.This class screen is called as hard screen, compare with collapsible curling soft screen and to have higher hardness, when being used for the less television set of size, as screen diagonal length during less than 72 inches, the way of press strip can make screen keep certain evenness around adopting, but because the elasticity that base material self is had and the restriction of screen thickness, when this type of screen is used for large scale TV machine, as screen diagonal length during greater than 100 inches, the way of press strip has been difficult to guarantee the evenness of screen around still adopting, if screen is thickeied then can be influenced light transmittance, reduce the display effect of screen.Meanwhile, because the elasticity of resin plate self, the thrust a little in the screen middle part promptly can cause the strain that screen is bigger.On the other hand, acrylic resin board has the characteristic of expanding with heat and contract with cold, and its temperature expansion coefficient is about about 2.5 ‰, therefore need when installing around reserve certain clearance for expansion.To the large scale screen, if the installation method of press strip around the use, thrust is crossed when conference causes screen to expand can not cause middle bulge of screen or depression to extending all around; Too small being difficult to of thrust fixed whole screen, more is difficult to guarantee the evenness of screen.During the screen out-of-flatness, both influenced outward appearance, more image fault can cause projection imaging the time.
The utility model content
The utility model provides a kind of stable screen fixture for solving the prior art problem.
The technical solution of the utility model is: a kind of screen fixture, and screen edge is installed with brace, and brace is equipped with fixing spring, and described fixing spring is fixed on the screen frame.
Use some equally distributed fixing springs that screen is fixed on the screen frame around the screen, and keep screen tension and smooth with certain tensile force; When operating ambient temperature raise, screen generation thermal expansion caused size to become big, needs to extending all around, and fixing spring shrinks, and still screen is kept certain pulling force, made screen keep smooth; When operating ambient temperature reduced, screen shrank, and fixing spring stretches, and the pulling force that fixing spring produces can not make screen damage much smaller than the screen material holding capacity.
As preferably, fixing spring is by regulating bolt on screen frame.Be convenient to regulate the tensile force of fixing spring to screen, it is smooth that screen is remained.
As preferably, described fixing spring is installed on the inboard of screen frame.
As preferably, described fixing spring is installed on the outside of screen frame.
In sum, the utlity model has following advantage:
1, the fixture that is arranged so that of fixing spring can both have certain tensioning to screen at any time, keeps screen smooth;
2, the pulling force of fixing spring can be adjusted control, and catching a cold at screen can not be subjected to excessive pulling force when shrinking and damage.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is brace and a fixing spring schematic side view among the utility model embodiment one;
Fig. 3 is the structural representation of the utility model embodiment two;
Fig. 4 is brace and a fixing spring schematic side view among the utility model embodiment two.
Among the figure, 1, screen, 2, brace, 3, fixing spring, 4, regulate bolt, 5, screen frame.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with accompanying drawing.
Embodiment one:
A kind of screen fixture, as shown in Figure 1, 2, screen 1 edge is bonded with brace 2, brace 2 one ends are equipped with fixing spring 3, and described fixing spring 3 is by regulating the inboard that bolt 4 is fixed in screen frame 5, wherein, inner ring with screen frame 5 is considered as the inboard, otherwise, then be considered as the outside.
Wherein, the method for adjustment of the selection of fixing spring 3 and adjusting bolt 4:
(1) selection of tensile force F:
If spring 3 required tensile forces are F1 during screen 1 tensioning; Destructive power when screen 1 excessively stretches is F2, and the spring number that screen 1 each stretching limit is disposed is n, then has:
F1<nF<kF2,
In the formula: k is a coefficient of safety, k<1; F is the tensile force that produces after fixing spring 3 pre-stretchings,
F1 and F2 can measure according to screen 1 data or by survey;
(2) check of tensile force scope:
Behind the primary election fixing spring 3 required tensile force F, also need check when screen 1 expands with heat and contract with cold, the operating characteristic of fixing spring 3,
If the pre-stretching amount corresponding with primary election fixing spring 3 tensile force F is L, the development length during screen 1 thermal expansion is L1, and the contracted length when screen 1 cold conditions is shunk is L2, then has:
(L-L1)k1>F1,
(L+L2)k1<kF2,
In the formula: k1 is the characteristic coefficient of fixing spring 3, is linear value in its working range.
(3) pre-stretching amount L determines:
Amount of tension L through can select required fixing spring 3 and operate as normal thereof after checking the time, determine L after, the actual amount of tension of regulating bolt 4 control fixing springs 3 when mounted by fixing spring.
Embodiment two:
A kind of screen fixture, shown in Fig. 3,4, screen 1 edge is bonded with brace 2, and brace 2 one ends are equipped with fixing spring 3, and described fixing spring 3 is by regulating the outside that bolt 4 is fixed in screen frame 5.
Wherein, the method for adjustment of the selection of fixing spring 3 and adjusting bolt 4:
(1) selection of compression stress F:
If spring 3 required compression stresses are F1 during screen 1 tensioning; Destructive power during screen 1 over-tension is F2, and screen 1 each compression spring number that the limit disposed is n, then has:
F1<nF<kF2,
In the formula: k is a coefficient of safety, k<1; F is the compression stress that produces after fixing spring 3 precommpression,
F1 and F2 can measure according to screen 1 data or by survey;
(2) check of compression stress scope:
Behind the primary election fixing spring 3 required compression stress F, also need check when screen 1 expands with heat and contract with cold, the operating characteristic of fixing spring 3,
If the pre compressed magnitude corresponding with primary election fixing spring 3 compression stress F is L, the development length during screen 1 thermal expansion is L1, and the contracted length when screen 1 cold conditions is shunk is L2, then has:
(L-L1)k1>F1,
(L+L2)k1<kF2,
In the formula: k1 is the characteristic coefficient of fixing spring 3, is linear value in its working range.
(3) determining of pre compressed magnitude L:
Pre compressed magnitude L through can select required fixing spring 3 and operate as normal thereof after checking the time, determine L after, the actual compression amount of regulating bolt 4 control fixing springs 3 when mounted by fixing spring.
Claims (4)
1. screen fixture, it is characterized in that: screen edge is installed with brace, and brace is equipped with fixing spring, and described fixing spring is fixed on the screen frame.
2. according to the described a kind of screen fixture of claim 1, it is characterized in that: fixing spring is by regulating bolt on screen frame.
3. according to claim 1 or 2 described a kind of screen fixture, it is characterized in that: described fixing spring is installed on the inboard of screen frame.
4. according to claim 1 or 2 described a kind of screen fixture, it is characterized in that: described fixing spring is installed on the outside of screen frame.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011201589195U CN202050490U (en) | 2011-05-18 | 2011-05-18 | Screen fixing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011201589195U CN202050490U (en) | 2011-05-18 | 2011-05-18 | Screen fixing device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN202050490U true CN202050490U (en) | 2011-11-23 |
Family
ID=44990781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011201589195U Expired - Fee Related CN202050490U (en) | 2011-05-18 | 2011-05-18 | Screen fixing device |
Country Status (1)
Country | Link |
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CN (1) | CN202050490U (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104882118A (en) * | 2015-05-26 | 2015-09-02 | 天津市得艺乐器有限公司 | Silencing equipment used for drum set |
CN105791727A (en) * | 2014-12-26 | 2016-07-20 | 海信集团有限公司 | Soft screen support adjustment device and projection display device |
CN108398850A (en) * | 2018-03-19 | 2018-08-14 | 青岛海信激光显示股份有限公司 | Projection screen and optical projection system |
WO2019218701A1 (en) * | 2018-05-18 | 2019-11-21 | 深圳光峰科技股份有限公司 | Projection screen and projection system comprising projection screen |
CN112162457A (en) * | 2018-03-19 | 2021-01-01 | 青岛海信激光显示股份有限公司 | Projection screen and projection display system |
CN113112920A (en) * | 2021-04-09 | 2021-07-13 | 昆山国显光电有限公司 | Display device and control method thereof |
US11442354B2 (en) | 2018-03-19 | 2022-09-13 | Hisense Laser Display Co., Ltd. | Projection screen and projection system |
-
2011
- 2011-05-18 CN CN2011201589195U patent/CN202050490U/en not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105791727A (en) * | 2014-12-26 | 2016-07-20 | 海信集团有限公司 | Soft screen support adjustment device and projection display device |
CN104882118A (en) * | 2015-05-26 | 2015-09-02 | 天津市得艺乐器有限公司 | Silencing equipment used for drum set |
CN108398850A (en) * | 2018-03-19 | 2018-08-14 | 青岛海信激光显示股份有限公司 | Projection screen and optical projection system |
CN112162457A (en) * | 2018-03-19 | 2021-01-01 | 青岛海信激光显示股份有限公司 | Projection screen and projection display system |
CN112162457B (en) * | 2018-03-19 | 2022-04-22 | 青岛海信激光显示股份有限公司 | Projection screen and projection display system |
US11442354B2 (en) | 2018-03-19 | 2022-09-13 | Hisense Laser Display Co., Ltd. | Projection screen and projection system |
WO2019218701A1 (en) * | 2018-05-18 | 2019-11-21 | 深圳光峰科技股份有限公司 | Projection screen and projection system comprising projection screen |
CN113112920A (en) * | 2021-04-09 | 2021-07-13 | 昆山国显光电有限公司 | Display device and control method thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20150518 |
|
EXPY | Termination of patent right or utility model |