CN2489358Y - Stepless fast lift mechanism for projector - Google Patents
Stepless fast lift mechanism for projector Download PDFInfo
- Publication number
- CN2489358Y CN2489358Y CN 01233429 CN01233429U CN2489358Y CN 2489358 Y CN2489358 Y CN 2489358Y CN 01233429 CN01233429 CN 01233429 CN 01233429 U CN01233429 U CN 01233429U CN 2489358 Y CN2489358 Y CN 2489358Y
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- CN
- China
- Prior art keywords
- screw rod
- clasp nut
- shell
- nut
- projector
- 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 stepless fast lifting mechanism for projector, which comprises a pair of crusts, a screw rod which has a ball head and a hand wheel, an opening nut which has a half screw hole and a handle as well as a pressing spring. The screw rod passes through the round holes in the upper and lower cover boards, while horizontal triangle thin gears are distributed from top to bottom on the working side of the screw rod which is opposite to the opening nut. The opening nut is fixed on the upper cover board of the crust through a pin and has triangle thin gears at one end, while the thin gear meshes with the thin gears on the working side of the upright rod. The other end of the opening nut has a handle and extends out of the crust. The pressing spring is installed between the handle of opening nut and the upper cover board of the crust. The utility model costs low and can satisfy self-locking thus can increase the supporting reliability and make the adjusting operation easy.
Description
Technical field:
The utility model relates to the stepless fast lifting mechanism of a kind of projector and belongs to field of projector, is exclusively used in fast and also can infinitely accurately regulates the elevation angle of 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, in this mechanism, 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 vertically.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 residual ridge in two places and screw rod Tuo Li Nogami close, replace a unthreaded hole and be enclosed within on the screw rod, the "open" state of Here it is clasp nut.Screw rod can be free to slide 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 this mechanism, the little axle that especially is positioned at two Side is difficult for processing, 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.
The stepless fast lifting mechanism of projector of the utility model design comprises a secondary shell, dribbling head and the screw rod of handwheel, a clasp nut and a stage clip with half screw and handgrip; In the circular hole of screw rod on the upper and lower cover plate of shell, in sorrowful of the screw rod work relative, be distributed with the triangle serration of equally spaced level trend from top to bottom with clasp nut; Described clasp nut 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 screw rod work is meshed, and the other end of clasp nut is a handgrip, and stretches out outside the shell; Described stage clip is contained between the handgrip and outer casing upper cover plate of clasp nut.
The stepless fast lifting mechanism of projector of the utility model design, because the center of rotation of clasp nut is moved to the right-hand of screw rod from screw axis, 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, alleviated difficulty of processing, thereby can cut down finished cost.But and mechanism's self-locking conditions satisfied, the acting force that imposes on nut because of screw rod at this moment not only can not pushed nut open, can make them mesh tightlyer on the contrary, therefore can improve the reliability of supporting.Simultaneously, also can reduce the rigidity of spring, become lighter and make to adjust to operate.
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 the elevating mechanism of the utility model design.
Among Fig. 1, 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, among Fig. 2, the 21st, little axle is fixed in the both sides of clasp nut.Among Fig. 3, the 31st, shell, the 32nd, screw rod, the 33rd, circlip, the 34th, pin, the 35th, stage clip, the 36th, the clasp nut of band handgrip, the 37th, projector's coverboard, the 38th, the handwheel affixed with screw rod.
As shown in Figure 3, the stepless fast lifting mechanism of projector of the utility model design comprises the screw rod 32 of a secondary shell 31, dribbling head and handwheel 38, a clasp nut 36 and a stage clip 35 with half screw and handgrip.In the circular hole of screw rod 32 on the upper and lower cover plate of shell, in sorrowful of the relative work of screw rod 32 and clasp nut 36, be distributed with the triangle serration of equally spaced level trend from top to bottom.Clasp nut 36 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 screw rod work is meshed, and the other end of clasp nut is a handgrip, and stretches out outside the shell.Stage clip 35 is contained between the handgrip and outer casing upper cover plate of clasp nut.
Principle of work clasp nut of the present utility model constitutes revolute pair by means of the aperture that is positioned at right-hand pin of screw axis and shell both sides, can rotate by a small margin with respect to shell.The left end of clasp nut is made half screw that matches with screw rod.Under the spring tension effect, clasp nut is in the state of " closing " shown in Figure 1, and the ridge of half screw and Luo Gan Nogami close, and play plain nut, stops screw rod to be free to slide vertically, and rotary screw can be finely tuned mechanism.If apply an external force that makes progress in handgrip, compression spring makes clasp nut change an angle in the counterclockwise direction around little axle, and the ridge of half screw and screw rod Tuo Li Nogami are closed, the "open" state of Here it is clasp nut.At this moment screw rod can be free to slide in the unthreaded hole of the upper and lower plate of shell vertically, until the external force that removes on the handgrip, nut " is closed " again till.The effect of circlip is to prevent screw rod slippage from shell aperture.Because the center of rotation of clasp nut is moved to the right-hand of screw rod from screw axis, 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 alleviated difficulty of processing, thereby can cut down finished cost.But and mechanism's self-locking conditions satisfied, the acting force that imposes on nut because of screw rod at this moment not only can not pushed nut open, can make them mesh tightlyer on the contrary, therefore can improve the reliability of supporting.Simultaneously, also can reduce the rigidity of spring, become lighter and make to adjust to operate.
Claims (1)
1, the stepless fast lifting mechanism of a kind of projector is characterized in that this mechanism comprises a secondary shell, dribbling head and the screw rod of handwheel, a clasp nut and a stage clip with half screw and handgrip; In the circular hole of screw rod on the upper and lower cover plate of shell, in sorrowful of the screw rod work relative, be distributed with the triangle serration of equally spaced level trend from top to bottom with clasp nut; Described clasp nut 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 screw rod work is meshed, and the other end of clasp nut is a handgrip, and stretches out outside the shell; Described stage clip is contained between the spiral shell handle and outer casing upper cover plate of clasp nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233429 CN2489358Y (en) | 2001-08-17 | 2001-08-17 | Stepless fast lift mechanism for projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233429 CN2489358Y (en) | 2001-08-17 | 2001-08-17 | Stepless fast lift mechanism for projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2489358Y true CN2489358Y (en) | 2002-05-01 |
Family
ID=33647266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01233429 Expired - Fee Related CN2489358Y (en) | 2001-08-17 | 2001-08-17 | Stepless fast lift mechanism for projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2489358Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028561A1 (en) * | 2008-09-09 | 2010-03-18 | 厦门松霖科技有限公司 | Constant force lifting rod |
| WO2010031267A1 (en) * | 2008-09-16 | 2010-03-25 | 厦门松霖科技有限公司 | Self-locking lifting rod |
| WO2010060305A1 (en) * | 2008-11-26 | 2010-06-03 | 厦门松霖科技有限公司 | Self-locking lifting rod |
| CN102466959A (en) * | 2010-11-04 | 2012-05-23 | 亚洲光学股份有限公司 | Inclination angle regulation mechanism for projector |
| CN105673654A (en) * | 2014-11-19 | 2016-06-15 | 中国航空工业集团公司西安飞机设计研究所 | Safe disengaging device for connecting pieces |
-
2001
- 2001-08-17 CN CN 01233429 patent/CN2489358Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028561A1 (en) * | 2008-09-09 | 2010-03-18 | 厦门松霖科技有限公司 | Constant force lifting rod |
| WO2010031267A1 (en) * | 2008-09-16 | 2010-03-25 | 厦门松霖科技有限公司 | Self-locking lifting rod |
| WO2010060305A1 (en) * | 2008-11-26 | 2010-06-03 | 厦门松霖科技有限公司 | Self-locking lifting rod |
| CN101424090B (en) * | 2008-11-26 | 2011-11-09 | 厦门松霖科技有限公司 | Self locking lifting rod |
| CN102466959A (en) * | 2010-11-04 | 2012-05-23 | 亚洲光学股份有限公司 | Inclination angle regulation mechanism for projector |
| CN102466959B (en) * | 2010-11-04 | 2013-10-23 | 亚洲光学股份有限公司 | Inclination angle regulation mechanism for projector |
| CN105673654A (en) * | 2014-11-19 | 2016-06-15 | 中国航空工业集团公司西安飞机设计研究所 | Safe disengaging device for connecting pieces |
| CN105673654B (en) * | 2014-11-19 | 2018-05-29 | 中国航空工业集团公司西安飞机设计研究所 | A kind of safe kickoff mechanism of connector |
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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 |