CN204613586U - A kind of projection screen - Google Patents
A kind of projection screen Download PDFInfo
- Publication number
- CN204613586U CN204613586U CN201520234223.4U CN201520234223U CN204613586U CN 204613586 U CN204613586 U CN 204613586U CN 201520234223 U CN201520234223 U CN 201520234223U CN 204613586 U CN204613586 U CN 204613586U
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- CN
- China
- Prior art keywords
- reel
- spool
- utility
- model
- projection
- 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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- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
Abstract
The utility model relates to a kind of projection screen, comprise reel, projection cloth and strut, it is characterized in that: be provided with the spool that can rotate in described reel, the two ends of described spool are respectively provided with bearing, and described bearing is connected with reel, one end of described reel arranges a crank handle, described crank handle and spool link into an integrated entity, and described spool reels projection cloth, and the outer end of described projection cloth connects a cross bar, described cross bar middle part is provided with a hook, and described reel is provided with two bracing frames.The utility model structure is simple, easy to operate, has broken away from the use of prior art centre mounted type projection screen, has eliminated safe hidden trouble; Meanwhile, the utility model does not need to drive by power equipment, can economize energy, and low cost of manufacture.
Description
Technical field
The utility model relates to a kind of projection screen.
Background technology
For the level of improving the quality of teaching, when most of colleges and universities and middle and primary schools start all, use multimedia teaching.Projection screen is the requisite instrument of multimedia teaching, but present projection screen is mostly be suspended on classroom, not only can affect classroom beauty treatment, and have potential safety hazard; Secondly, opening and packing up of projection screen is all utilize driven by power, and therefore manufacturing cost is higher, also can cause unnecessary energy dissipation.
Summary of the invention
For the above-mentioned defect existed in prior art, the utility model provides a kind of projection screen.When not using, projection screen does not need to hang classroom, and can use manual simple operations when using, without the need to by power equipment.
The utility model is achieved by the following technical solution: a kind of projection screen, comprise reel, projection cloth and strut, it is characterized in that: in described reel, be provided with the spool that can rotate, the two ends of described spool are arranged with bearing, described bearing is connected with reel, one end of described reel arranges a crank handle, described crank handle and spool link into an integrated entity, described spool reels projection cloth, the outer end of described projection cloth connects a cross bar, described cross bar middle part is provided with a hook, and described reel is provided with two bracing frames.
When the utility model uses, reel is placed in place, utilizes crank handle to be shaken out by projection cloth, utilize strut to be suspended on by hook simultaneously and follow closely on the nail of metope in advance; After using, utilize strut to take off to be suspended on the hook on nail, with crank handle, projection cloth is involved in spool simultaneously.
The beneficial effects of the utility model are: the utility model structure is simple, easy to operate, has broken away from the use of prior art centre mounted type projection screen, has eliminated safe hidden trouble; Meanwhile, the utility model does not need to drive by power equipment, can economize energy, and low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is front view of the present utility model;
In figure, 1 is reel, and 2 is projection cloths, and 3 is spools, and 4 is bearings, and 5 is crank handles, and 6 is cross bars, and 7 is hooks, and 8 is bracing frames, and 9 is struts.
Embodiment
Below by indefiniteness embodiment and by reference to the accompanying drawings to the utility model further instruction:
As shown in drawings, a kind of projection screen, comprise reel 1, projection cloth 2 and strut 9, it is characterized in that: in described reel 1, be provided with the spool 3 that can rotate, the two ends of described spool 3 are arranged with bearing 4, described bearing 4 is connected with reel 1, one end of described reel 1 arranges a crank handle 5, described crank handle 5 links into an integrated entity with spool 3, described spool 3 reels projection cloth 2, the outer end of described projection cloth 2 connects a cross bar 6, and described cross bar 6 middle part is provided with a hook 7, and described reel 1 is provided with two bracing frames 8.
When the utility model uses, reel 1 is placed in place, utilizes crank handle 5 to be shaken out by projection cloth 2, utilize strut 9 to be suspended on by hook 7 simultaneously and follow closely on the nail of metope in advance; After using, utilize strut 9 to take off to be suspended on the hook 7 on nail, with crank handle 9, projection cloth is involved in spool 3 simultaneously.
The present embodiment is only used as explanation of the present utility model, and be not limited, those skilled in the art also can make improvement on this basis.The utility model principle is simple, energy-conserving and environment-protective, and use safety is easy to operate, and greatly reduces production cost.
Other parts in the present embodiment adopt known technology, do not repeat them here.
Claims (1)
1. a projection screen, comprise reel (1), projection cloth (2) and strut (9), it is characterized in that: in described reel (1), be provided with the spool (3) that can rotate, the two ends of described spool (3) are arranged with bearing (4), described bearing (4) is connected with reel (1), one end of described reel (1) arranges a crank handle (5), described crank handle (5) and spool (3) link into an integrated entity, described spool (3) reels projection cloth (2), the outer end of described projection cloth (2) connects a cross bar (6), described cross bar (6) middle part is provided with a hook (7), described reel (1) is provided with two bracing frames (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520234223.4U CN204613586U (en) | 2015-04-17 | 2015-04-17 | A kind of projection screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520234223.4U CN204613586U (en) | 2015-04-17 | 2015-04-17 | A kind of projection screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613586U true CN204613586U (en) | 2015-09-02 |
Family
ID=53966129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520234223.4U Expired - Fee Related CN204613586U (en) | 2015-04-17 | 2015-04-17 | A kind of projection screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204613586U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390466A (en) * | 2017-07-28 | 2017-11-24 | 安徽聚合自动化工程有限公司 | A kind of dust-proof height-adjustable projecting apparatus |
-
2015
- 2015-04-17 CN CN201520234223.4U patent/CN204613586U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390466A (en) * | 2017-07-28 | 2017-11-24 | 安徽聚合自动化工程有限公司 | A kind of dust-proof height-adjustable projecting apparatus |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20160417 |