CN2844980Y - Projecting screen lifting mechanism - Google Patents
Projecting screen lifting mechanism Download PDFInfo
- Publication number
- CN2844980Y CN2844980Y CN 200520060674 CN200520060674U CN2844980Y CN 2844980 Y CN2844980 Y CN 2844980Y CN 200520060674 CN200520060674 CN 200520060674 CN 200520060674 U CN200520060674 U CN 200520060674U CN 2844980 Y CN2844980 Y CN 2844980Y
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- China
- Prior art keywords
- pipe
- big pipe
- projection screen
- outer tube
- big
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- Expired - Lifetime
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Abstract
The utility model relates to a projection screen lifting mechanism belonging to the field of a projection screen. An automatic fallback device which is composed of an air valve and a positioning mechanism is installed on an outside pipe, wherein the second section of a supporting tube is positioned by the positioning mechanism which is composed of a positioning column, a controlling wedge block, and compression spring components of the positioning column; an automatic raising device which is composed of a compression spring installed in a big circular pipe, a press key at the top part, a compression bar and a gusset plate is installed on the top part of a small circular pipe, and driving position is realized by a pedal. The utility model has the advantages of simple and convenient operation, and convenient use; operating staff operate the utility model in front of the utility model, which avoids the operation shortage of the floor type projection screen, and the utility model is used on the floor type projection screen.
Description
Technical field
The utility model projection screen elevating mechanism belongs to the projection screen field, a kind of projection screen elevating mechanism that particularly portable ground type projection screen uses.
Background technology
Existing ground type projection screen is by the lifting stay pipe, base, shell, tube, curtain, trombone slide, assemblies such as handle are formed, projection screen is wound on the tube, be installed in the base, the lifting stay pipe is made up of more piece, can progressively stretch out, the lifting stay pipe is the back side at curtain, during use, erect the lifting stay pipe, the pulling trombone slide is mentioned curtain, handle is hung on the hook at stay pipe top, because the lifting stay pipe is the back side at curtain, must the operator forward the back side of projection screen to, step by step will every manage pull-up, rise to the highest, in the time of need placing near wall for operator's inconvenience, particularly projection screen, operating personnel must operate front and back, and screen is shifted near metope with being careful, the operation of ground type projection screen has many deficiencies, and inconvenient operation is used trouble, when operating personnel's insufficient height, its limitation is more obvious.
The utility model content
The purpose of this utility model is to avoid the deficiencies in the prior art part and provides a kind of simple to operation, in the projection screen previous action, need not to run the projection screen elevating mechanism that uses before and after the operating personnel on the ground type projection screen.
The purpose of this utility model reaches by following measure, the projection screen elevating mechanism is made up of three joint stay pipes, first segment is an outer tube, second joint is big pipe, the 3rd joint is little pipe, outer tube has a round cavity and one to be similar to leg-of-mutton exocoel, exocoel is used to arrange brake line, round cavity is used for parts such as the big pipe of device, big pipe and little pipe are circular straighttube, on outer tube, install and fall device automatically after rise, automatically falling device after rise is made up of air valve and detent mechanism, upwards slowly draw high the big pipe of the second joint stay pipe, air enters the round cavity of outer tube, the big pipe of the detent mechanism location second joint stay pipe, at roundlet pipe top automatic lifting device is installed, automatically lifting device is the compression spring of adorning by in the big pipe, the button at top, depression bar, buckle is formed, push button, little pipe need not operating personnel and draws high extending upwardly high location automatically, contacts with roundlet pipe guide pin bushing until roundlet pipe spacer, three joint fall ways all launch to raise, and projection screen rises to peak.During recovery, releasing detent mechanism location, the landing downwards under the effect of gravity of the big pipe of the second joint stay pipe, air in the annular seal space discharges by aperture, reach the purpose that fall way evenly slowly falls, the little pipe of the 3rd joint stay pipe is pressed in the big pipe of the second joint stay pipe, and the lifting stay pipe is regained.
Air valve of the present utility model is by free bearing, big pipe plug, vent valve, exhaust set screw and O-ring seal are formed, install by free bearing at the round cavity of outer tube, big pipe plug, vent valve, the aeroseal chamber that exhaust set screw and O-ring seal are formed, vent valve is installed on the free bearing by the vent valve rotating shaft, vent valve is contained on the pore of vent valve, the pore of vent valve is provided with the vent valve cushion, on the pore of vent valve, be equipped with and regulate the exhaust set screw, the height of set screw, the size of may command air turnover, free bearing is fixedlyed connected with outer tube by the free bearing fixed pin, and is sealed with O-ring seal.Big pipe plug is fixedlyed connected with big pipe with big pipe fixed pin, circle sealing in O-ring seal and the outer tube is housed on the plug, big pipe can slide up and down in managing outside, by big pipe guide pin bushing guiding and location, little pipe is contained in big pipe inside, and can slide up and down, lead and locate with roundlet pipe plug, roundlet pipe spacer, roundlet pipe guide pin bushing.
Air valve of the present utility model has played the effect of an air spring, also can a flexible spring be installed at the round cavity of outer tube.
Detent mechanism of the present utility model is controlled voussoir by reference column, and the reference column compression spring assembly is formed.The top of outer tube is equipped with a detent mechanism, location when being used for rising to big pipe, and it is by reference column, the control voussoir, the reference column compression spring assembly is formed.Be installed on the screen shell by the free bearing rotating shaft, pedal and brake line are contained on the pedal pedestal, and the pedal pedestal is installed on the central bottom of screen shell with screw, so that from the previous action of screen.Brake line is connected on the control voussoir, reference column fastens the pilot hole of big pipe lower end, with big pipe location, reference column is to withstand on the outer wall of big pipe in initial state, when big pipe drew high certain altitude, the round end of reference column inserted pilot hole under the effect of spring, when big pipe moves up, exhaust valve opening, air pass the round cavity that vent port enters outer tube from the outside.
Automatic lifting device of the present utility model is the compression spring of adorning by in the big pipe, the button at top, depression bar, buckle is formed, and clicks the button at top, depress depression bar, depression bar breaks away from the button bit of big pipe with buckle, and little pipe extends upwardly height automatically under the effect of bottom compression spring, need not operating personnel and draw high again, contact the location with roundlet pipe guide pin bushing until roundlet pipe spacer.
During use, upwards slowly draw high the big pipe of the second joint stay pipe, air enters the round cavity of outer tube, the big pipe of the detent mechanism location second joint stay pipe, curtain is hung on the hook, click the button at top, depression bar breaks away from buckle the button bit of big pipe, little pipe is under the effect of bottom compression spring, automatically extend upwardly height, need not operating personnel and draw high again, contact the location with roundlet pipe guide pin bushing until roundlet pipe spacer, three joint fall ways all launch to raise, and projection screen rises to peak.After screen uses, receive second joint earlier, push down on the pedal, under the pulling of brake line terminal, the brake line steel cable is toward drop-down, make the pilot hole of reference column and the big pipe of the second joint stay pipe break away from, the landing downwards under the effect of gravity of the big pipe of the second joint stay pipe, because of the sealing of O-ring seal, vent valve is arranged, the air in the annular seal space can only discharge by aperture, so when the downward landing of the second joint big pipe of stay pipe, also can only slowly fall, reach the purpose that fall way evenly slowly falls.The little pipe of the 3rd joint stay pipe can be pressed in the big pipe of the second joint stay pipe, the buckle in the little pipe fastens the button bit on big pipe top again at this moment, and so far all the lifting stay pipes are regained.
The utility model is simple to operation, and operating personnel's previous action is easy to use, has avoided the operation deficiency of ground type projection screen, is a kind of projection screen elevating mechanism that uses on the ground type projection screen.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is that the big pipe of the second joint stay pipe of the present utility model rises the status architecture synoptic diagram.
Accompanying drawing 3 is that the 3rd joint stay pipe roundlet pipe of the present utility model rises the status architecture synoptic diagram.
Accompanying drawing 4 is Non-return air valve structural representations of the present utility model.
Accompanying drawing 5 is detent mechanism structural representations of the present utility model.
Accompanying drawing 6 is driving detent mechanism structural representations of the present utility model.
The 1-pedal, 2-brake line terminal, 3-pedal pedestal, the rotating shaft of 4-pedestal, 5-brake line outer tube lower terminal, the 6-brake line, the 7-exhaust bolt, 8-brake line outer tube upper terminal, 9-brake line steel cable, 10-vent valve cushion, the 11-vent valve, the rotating shaft of 12-vent valve, 13-free bearing fixed pin, the 14-free bearing, the 15-O-ring seal, the big pipe plug of 16-, the big pipe fixed pin of 17-, 18-roundlet pipe spacer, 19-steel cable end card, 20-controls voussoir, 21-reference column compression spring, the 22-reference column, the 23-location is rubber base down, 24-locatees upper rubber base, 25-voussoir spring, the 26-backing plate, the big pipe guide pin bushing of 27-, the 28-depression bar, the 29-Pressure-bar spring, the rotating shaft of 30-button, the 31-button, the 32-hook, the 33-quilting rivet, 34-roundlet pipe guide pin bushing, 35-buckle wedge, the 36-buckle, 37-buckle flat spring, the little pipe of 38-, the big pipe of 39-, the 40-outer tube, 41-roundlet pipe fixed pin, 42-roundlet pipe plug, the 43-shell fragment, 44-shell fragment spring, 45-roundlet pipe compression spring, the 46-screen, the rotating shaft of 47-free bearing, the 48-gib screw, pore 49.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the lifting support section is made up of three joint stay pipes, first segment is an outer tube 40, second joint is big pipe 39, the 3rd joint is roundlet pipe 38, outer tube has a round cavity and one to be similar to leg-of-mutton exocoel, and exocoel is used to arrange brake line, and round cavity is used for parts such as the big pipe of device.Big pipe and little pipe are circular straighttube, round cavity at outer tube, form an aeroseal chamber by free bearing fixed pin 13, free bearing 14, big pipe plug 16, vent valve 11 and a plurality of O-ring seal 15, free bearing is fixedlyed connected with outer tube by free bearing fixed pin 13, big pipe plug is fixedlyed connected with big pipe with big pipe fixed pin 17, and 2 O-ring seals are housed on the plug, with circle sealing in the outer tube, big pipe can slide up and down in managing outside, by big pipe guide pin bushing 27 guiding and location.Little pipe is contained in big pipe inside, and can slide up and down, and leads and locatees with roundlet pipe plug 42, roundlet pipe spacer 18, roundlet pipe guide pin bushing 34.In the big pipe compression spring is housed, i.e. roundlet pipe compression spring 45 among the figure, it is used for raising automatically little pipe, and supports the weight on top.The top of outer tube is equipped with a detent mechanism, location when being used for rising to big pipe.Automatically lifting device is the compression spring of adorning by in the big pipe, the button at top, depression bar, buckle is formed, click the button 31 at top, button is around button rotating shaft 30 rotations, depress depression bar 28, depression bar with pressure reach in the buckle wedge 35, by force buckle 36 is pulled to the right, force buckle to be offset to the right, buckle breaks away from the button bit of big pipe 39, and roundlet pipe 38 extends upwardly height automatically under the effect of bottom compression spring 45, need not operating personnel and draw high again, contact the location with roundlet pipe guide pin bushing 34 until roundlet pipe spacer 18.
As shown in Figure 4, air valve structure of the present utility model, round cavity at outer tube 40, form an aeroseal chamber by free bearing 14, big pipe plug 16, vent valve 11, exhaust set screw 7 and a plurality of O-ring seal 15, vent valve is installed on the free bearing by vent valve rotating shaft 12, vent valve is contained on the pore of vent valve, the pore of vent valve is provided with vent valve cushion 10, the air of the inside has only the pore 49 by vent valve externally to pass in and out, regulate the height of exhaust set screw, the size of may command air turnover.When big pipe moved up, exhaust valve opening, air passed the round cavity that vent port enters outer tube from the outside.The landing downwards under the effect of gravity of big pipe, the air in the annular seal space can only discharge by aperture, reaches evenly slowly to fall.
As accompanying drawing 5, shown in the accompanying drawing 6, the top of the utility model outer tube is equipped with a detent mechanism, location when being used for rising to big pipe, it is by reference column 22, control voussoir 20, reference column compression spring 21, steel cable end card 19, the location is rubber base 23 down, location upper rubber base 24, voussoir spring 25, backing plate 26 assemblies are formed, control voussoir 20 passes reference column 22, brake line steel cable 9 is connected on the control voussoir, reference column fastens the pilot hole of big pipe 39 lower ends, with big pipe location, reference column is to withstand on the outer wall of big pipe in initial state, when big pipe draws high certain altitude, the round end of reference column inserts pilot hole under the effect of reference column compression spring, under the pulling of brake line, drive control voussoir 20 and move down, by force reference column 22 is pushed to the left side, make the reference column and the pilot hole of big pipe break away from.Driving the location realizes by pedal, be installed on the screen shell by the free bearing rotating shaft, form by pedal 1, brake line terminal 2, pedal pedestal 3, pedestal rotating shaft 4, brake line outer tube lower terminal 5, pedal and brake line 6 are contained on the pedal pedestal, and the pedal pedestal is installed on the central bottom of screen 46 shells with gib screw 48.
Claims (6)
1, a kind of projection screen elevating mechanism, form by three joint stay pipes, first segment is an outer tube, second joint is big pipe, the 3rd joint is little pipe, big pipe can slide up and down in managing outside, and by big pipe guide pin bushing guiding and location, little pipe is contained in big pipe inside, and can slide up and down, with roundlet pipe plug, roundlet pipe spacer, roundlet pipe guide pin bushing leads and locatees, and it is characterized in that installing on outer tube falling device automatically after rise, falls device automatically after rise and is made up of air valve and detent mechanism, the top installing and locating mechanism of outer tube, detent mechanism is located big pipe, at roundlet pipe top automatic lifting device is installed, dress compression spring in the big pipe.
2, projection screen elevating mechanism according to claim 1, it is characterized in that air valve is at the round cavity of outer tube the aeroseal chamber of being made up of free bearing, big pipe plug, vent valve, exhaust set screw and O-ring seal to be installed, vent valve is installed on the free bearing by the vent valve rotating shaft, is equipped with to regulate the exhaust set screw on vent port.
3, projection screen elevating mechanism according to claim 1, it is characterized in that detent mechanism is by reference column, the control voussoir, the reference column compression spring assembly is formed, brake line is connected on the control voussoir, reference column fastens the pilot hole of big pipe lower end, the round end of reference column inserts pilot hole under the effect of spring, driving the location is installed on the screen shell by the free bearing rotating shaft, be by pedal, the brake line terminal, the pedal pedestal, the pedestal rotating shaft, brake line outer tube lower terminal is formed, pedal and brake line are contained on the pedal pedestal, and the pedal pedestal is installed on the central bottom of screen shell with screw.
4, projection screen elevating mechanism according to claim 1 is characterized in that automatic lifting device is the compression spring of adorning by in the big pipe, the button at top, depression bar, buckle is formed, and button rotates around the button rotating shaft, depression bar reaches wedge in the buckle with pressure, and buckle breaks away from the button bit of big pipe.
5, projection screen elevating mechanism according to claim 1 is characterized in that outer tube has a round cavity and one to be similar to leg-of-mutton exocoel, and exocoel is used to arrange brake line, and round cavity is used for the big pipe of device.
6, projection screen elevating mechanism according to claim 1 is characterized in that at the round cavity of outer tube a flexible spring being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060674 CN2844980Y (en) | 2005-06-24 | 2005-06-24 | Projecting screen lifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520060674 CN2844980Y (en) | 2005-06-24 | 2005-06-24 | Projecting screen lifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2844980Y true CN2844980Y (en) | 2006-12-06 |
Family
ID=37486924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520060674 Expired - Lifetime CN2844980Y (en) | 2005-06-24 | 2005-06-24 | Projecting screen lifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2844980Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373642B (en) * | 2007-08-20 | 2011-08-24 | 佳世达科技股份有限公司 | Elevating mechanism with elastic force correcting function and related display apparatus thereof |
| CN102879991A (en) * | 2012-10-26 | 2013-01-16 | 昆山集智成模具有限公司 | Projection screen bracket |
| CN108204505A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of Modified adjustable projection table |
| CN108204506A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of novel adjustable projection table |
| CN108204504A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of convenient adjustable projection platform |
-
2005
- 2005-06-24 CN CN 200520060674 patent/CN2844980Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373642B (en) * | 2007-08-20 | 2011-08-24 | 佳世达科技股份有限公司 | Elevating mechanism with elastic force correcting function and related display apparatus thereof |
| CN102879991A (en) * | 2012-10-26 | 2013-01-16 | 昆山集智成模具有限公司 | Projection screen bracket |
| CN108204505A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of Modified adjustable projection table |
| CN108204506A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of novel adjustable projection table |
| CN108204504A (en) * | 2017-11-24 | 2018-06-26 | 韦德远 | A kind of convenient adjustable projection platform |
| CN108204506B (en) * | 2017-11-24 | 2019-10-01 | 南安松茂贸易有限公司 | A kind of adjustable projection platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150624 Granted publication date: 20061206 |