CN2489357Y - Fast lift mechanism for projector - Google Patents
Fast lift mechanism for projector Download PDFInfo
- Publication number
- CN2489357Y CN2489357Y CN 01233428 CN01233428U CN2489357Y CN 2489357 Y CN2489357 Y CN 2489357Y CN 01233428 CN01233428 CN 01233428 CN 01233428 U CN01233428 U CN 01233428U CN 2489357 Y CN2489357 Y CN 2489357Y
- Authority
- CN
- China
- Prior art keywords
- handgrip
- handle
- projector
- vertical rod
- shell
- 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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Abstract
The utility model relates to a fast lifting mechanism for projector, which comprises a pair of crusts, a rectangular section upright rod which has a fixed cross bar at the bottom, a handle and a pressing spring. The upright rod passes through rectangular holes in the upper and lower cover board, while horizontal triangle thin gears are distributed from top to bottom on the working side of the upright rod which is opposite to the handle; the handle is fixed on the upper cover board of the crust through a pin, and one end of the handle has triangle thin gears which are engaged with the thin gears on the working side of the upright rod. The other end of the handle extends out of the crust; the pressing spring is installed between the handle and the crust. The utility model simplifies the structure, reduces processing difficulty thus reduces processing cost; also the mechanism can satisfy self-locking thus can increase the supporting reliability. At the same time, the rigidity of the spring can be reduced, making the adjusting operation easier. Each projector only needs one such mechanism.
Description
Technical field:
The utility model relates to a kind of projector fast lifting mechanism, belongs to the projection mechanism technical field, is exclusively used in the elevation angle of quick adjustment projector, makes the video on the screen reach desired proper height.
Background technology:
In the prior art elevating mechanism of projector as depicted in figs. 1 and 2, this is a kind of fine-tuning fast lifting mechanism.
Among Fig. 1 and Fig. 2, the 11st, shell, the 12nd, the clasp nut of band handgrip, the 13rd, spring, the 14th, screw rod, the 15th, the installing plate in the projector, the 16th, circlip, the 21st, little axle is fixed in the both sides of clasp nut.
The principle of work of said mechanism is: clasp nut can rotate with respect to shell by a small margin by means of the little axle of both sides and the aperture formation revolute pair of shell both sides.Clasp nut makes a spiral shell mosquito hole of matching with screw rod along axis n-n direction, then makes a slightly larger in diameter in the unthreaded hole of screw rod external diameter along axis m-m direction.Thereby most of ridge in above-mentioned spiral shell mosquito hole cut when processing inclination unthreaded hole, only leaves small amount of residual spiral shell mosquito tooth at the lower left corner and two places, the upper right corner in as shown in Figure 1 hole.Under the spring tension effect, clasp nut is in the state of " closing " shown in Figure 1, and residual ridge and Luo Gan Nogami close, and play plain nut, stops screw rod to be free to slide along axis.Rotating screw bolt can be finely tuned mechanism.If apply an external force that makes progress in handgrip, compression spring, make clasp nut change an angle A along clockwise direction around little axle, make axis m-m overlap with n-n, at this moment two places stay the residual line tooth of spiral shell all to close with screw rod Tuo Li Nogami, replace a unthreaded hole and be enclosed within on the screw rod, the "open" state of Here it is clasp nut.Screw rod can move freely in unthreaded hole vertically, until the external force that removes on the handgrip, nut " is closed " again till.
The major defect of this design is:
1. the clasp nut complex structure of band handgrip especially is positioned at the difficult processing of little axle of two Side, certainly will improve processing cost;
2. the center of rotation of clasp nut is positioned on the center line of screw rod, do not satisfy on the theory of mechanisms " condition of self-locking ".After nut closed, screw rod had the trend of pushing nut open for the acting force of nut, if spring tension is big inadequately or projector is overweight, the phenomenon that falls automatically may take place.Therefore, in order to improve the supporting reliability, all Mining is with harder spring usually, and this brings the sensation of undue effort to the operator.
3. fine-tuning fast lifting mechanism needs with two in every projector usually, so that adjust the crooked of image.But the desktop of generally placing projector is all more smooth, and inclination of image is also not obvious, need not adjust usually, so just show unnecessary with two fast lifting mechanisms.
Summary of the invention:
The purpose of this utility model is a kind of projector of design fast lifting mechanism, changes the structure of prior art, with the reduction equipment cost, and improves and supports reliability.
Projector's fast lifting mechanism of the utility model design comprises square-section vertical rod, a handgrip and a stage clip of a secondary shell, a bottom band fixed transverse rod.In the rectangular opening of vertical rod on the upper and lower cover plate of shell, in sorrowful of the vertical rod work relative, be distributed with the triangle serration of equally spaced level trend from top to bottom with handgrip; Handgrip is fixed on by pin on the upper cover plate of shell, and the one end is processed with the triangle serration, and the serration in sorrowful of this serration and the vertical rod work is meshed, and the other end of handgrip stretches out outside the shell; Stage clip is contained between handgrip and the outer casing upper cover plate.
Projector's fast lifting mechanism of the utility model design, owing to the center of rotation of handgrip is arranged on the outside of closely-pitched, an available simple pin replaces the little axle that is fixed in the clasp nut both sides in the prior art, not only simplify the structure, reduced difficulty of processing, thereby reduced processing cost; But and mechanism's self-locking conditions satisfied, therefore the acting force that imposes on handgrip because of vertical rod at this moment not only can not pushed handgrip open, can make them mesh tightlyer on the contrary, can improve the reliability of supporting.Simultaneously, also can reduce the rigidity of spring, become lighter and make to adjust to operate.In addition,, increased the stability of supporting, so get final product in every projector with a this mechanism because the vertical rod bottom is connected with about one to the cross bar that extends.
Description of drawings:
Fig. 1 is the prior art structural representation.
Fig. 2 is the A-A vertical view of Fig. 1.
Fig. 3 is the structural representation of projector's fast lifting mechanism of the utility model design.
Fig. 4 is the side view of Fig. 3.
Among Fig. 3 and Fig. 4, the 31st, shell, the 32nd, the square-section vertical rod of bottom band fixed transverse rod, the 33rd, pin, the 34th, stage clip, the 35th, handgrip, the 36th, projector's coverboard.
Embodiment:
As shown in Figure 3, projector's fast lifting mechanism of the utility model design comprises the square-section vertical rod 32 of a secondary shell 31, a bottom band fixed transverse rod, a handgrip 35 and a stage clip 34.In the rectangular opening of vertical rod 32 on the upper and lower cover plate of shell 31, in sorrowful of the relative work of vertical rod 32 and handgrip 35, be distributed with the triangle serration of equally spaced level trend from top to bottom.Handgrip 35 is fixed on by pin on the upper cover plate of shell 31, and the one end is processed with the triangle serration, and the serration in sorrowful of this serration and the vertical rod work is meshed, and the other end of handgrip 35 stretches out outside the shell.Stage clip 34 is contained between handgrip and the outer casing upper cover plate.
Principle of work of the present utility model is that handgrip constitutes revolute pair by means of the aperture that is positioned at right-hand pin of vertical rod axis and shell both sides, can rotate by a small margin with respect to shell.Under the effect of stage clip tension force, handgrip and vertical rod are in the state of " the closing " shown in the figure, and the closely-pitched engagement on the closely-pitched of handgrip left end and the vertical rod side stops vertical rod to move up and down.If apply an external force that makes progress in handgrip, compression spring, make handgrip change an angle in the counterclockwise direction around little axle, closely-pitched and vertical rod Tuo Li Nogami on the handgrip are closed, vertical rod loses constraint, can in the unthreaded hole of the upper and lower plate of shell, move freely vertically, until the external force that removes on the handgrip, handgrip and vertical rod " are closed " again till.Owing to the outside that the center of rotation of handgrip is arranged on closely-pitched, an available simple pin replaces the little axle that is fixed in the clasp nut both sides in the prior art, not only simplifies the structure, has reduced difficulty of processing, thereby reduced processing cost.But and mechanism's self-locking conditions satisfied, therefore the acting force that imposes on handgrip because of vertical rod at this moment not only can not pushed handgrip open, can make them mesh tightlyer on the contrary, can improve the reliability of supporting.Simultaneously, also can reduce the rigidity of spring, become lighter and make to adjust to operate.In addition,, increased the stability of supporting, so get final product in every projector with a this mechanism because the vertical rod bottom is connected with about one to the cross bar that extends.
Claims (1)
1, a kind of projector fast lifting mechanism is characterized in that, this elevating mechanism comprises square-section vertical rod, a handgrip and stage clip of a secondary shell, a bottom band fixed transverse rod; In the rectangular opening of described vertical rod on the upper and lower cover plate of shell, in sorrowful of the vertical rod work relative, be distributed with the triangle serration of equally spaced level trend from top to bottom with handgrip; Described handgrip is fixed on by pin on the upper cover plate of shell, and the one end is processed with the triangle serration, and the serration in sorrowful of this serration and the vertical rod work is meshed, and the other end of handgrip stretches out outside the shell; Described stage clip is contained between handgrip and the outer casing upper cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233428 CN2489357Y (en) | 2001-08-17 | 2001-08-17 | Fast lift mechanism for projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233428 CN2489357Y (en) | 2001-08-17 | 2001-08-17 | Fast lift mechanism for projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2489357Y true CN2489357Y (en) | 2002-05-01 |
Family
ID=33647265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01233428 Expired - Fee Related CN2489357Y (en) | 2001-08-17 | 2001-08-17 | Fast lift mechanism for projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2489357Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726981B (en) * | 2008-10-31 | 2011-05-11 | 佛山普立华科技有限公司 | Elevating mechanism and projecting camera provided with same |
| CN103754793A (en) * | 2013-10-21 | 2014-04-30 | 华中科技大学 | Lifting mechanism with automatic limiting device |
-
2001
- 2001-08-17 CN CN 01233428 patent/CN2489357Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726981B (en) * | 2008-10-31 | 2011-05-11 | 佛山普立华科技有限公司 | Elevating mechanism and projecting camera provided with same |
| CN103754793A (en) * | 2013-10-21 | 2014-04-30 | 华中科技大学 | Lifting mechanism with automatic limiting device |
| CN103754793B (en) * | 2013-10-21 | 2016-04-13 | 华中科技大学 | A kind of lifting mechanism with automatic limit device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |