CN2720484Y - Upper-spacing positioned projection screen - Google Patents
Upper-spacing positioned projection screen Download PDFInfo
- Publication number
- CN2720484Y CN2720484Y CN 200420082969 CN200420082969U CN2720484Y CN 2720484 Y CN2720484 Y CN 2720484Y CN 200420082969 CN200420082969 CN 200420082969 CN 200420082969 U CN200420082969 U CN 200420082969U CN 2720484 Y CN2720484 Y CN 2720484Y
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- upper limit
- positioning screw
- tube
- self
- location
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- Expired - Lifetime
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Abstract
The utility model relates to an upper-spacing positioned projection screen, belonging to the projection screen field. The rotation of a rotating tube makes the curtain unreeled and wound on the rotating tube; an upper-spacing positioned mechanism is composed of an upper-spacing travel positioned wheel, a positioned screw rod and a positioned buffer spring; the center screw hole of the upper-spacing travel positioned wheel is matched with the positioned screw rod; the other end of the positioned screw rod is fixedly provided with the positioned buffer spring; the steps on the upper-spacing travel positioned wheel are inserted into the positioned buffer spring; the utility model has simple structure and practicality; when the curtain is unreeled to the upper-spacing position, the upper-spacing positioned projection screen has buffer action, which avoids a pull tube impacting the shell during the unreeling of the screen and prevents unreeling elasticity from acting on the screen; the upper-spacing positioned projection screen is an adjustable upper-spacing positioned projection screen.
Description
The projection screen of technical field the utility model upper limit location belongs to the projection screen field, particularly relates to a kind of upper limit locating device of projection screen.
The projection screen that background technology is used now is by trombone slide, curtain, the torque spring assembly, tube and shell are formed, trombone slide is connected an end of curtain, and the other end of curtain is connected on the tube, under the effect of torque spring assembly, rotation by tube with the curtain backrush on tube, because the effect of curtain backrush elastic force relies on trombone slide can stop the curtain backrush with contacting of shell, when backrush elastic force is big, trombone slide can produce collision on shell, cause trombone slide or shell to damage, backrush elastic force acts on the curtain always after the curtain backrush simultaneously, causes that curtain is stressed to be stretched, the long-term use can influence the smooth of curtain, reduces the serviceable life of curtain.
The purpose of this utility model is to avoid the deficiencies in the prior art part and a kind of location curtain backrush upper limit position of can regulating is provided, avoid trombone slide in the curtain backrush, to collide shell, prevent the projection screen of the upper limit location of the long-term stressed stretcher strain of curtain, can regulate the position of the curtain backrush upper limit arbitrarily, make things convenient for the user to locate the position of curtain.
The content the purpose of this utility model of utility model reaches by following measure, it is by trombone slide, curtain, the torque spring assembly, tube and shell are formed, trombone slide is connected an end of curtain, the other end of curtain is connected on the tube, under the effect of torque spring assembly, rotation by tube with the curtain backrush on tube, in tube, be provided with upper limit detent mechanism and upper limit positioning regulating mechanism, the upper limit detent mechanism is by upper limit stroke locating wheel, positioning screw, the location buffer spring is formed, upper limit stroke locating wheel cooperates with positioning screw, upper limit stroke locating wheel moves on positioning screw, the center screw of upper limit stroke locating wheel cooperates with positioning screw, be provided with locator card at positioning screw one end, the other end at positioning screw is mounted with the location buffer spring, a step is arranged on the upper limit stroke locating wheel, step is provided with a chamfer, step can insert in the buffer spring of location, upper limit stroke locating wheel is connected the inwall of tube, and upper limit stroke locating wheel rotates with tube, at positioning screw one end fixedly runner of a upper limit is set, upper limit is an end of runner support positioning screw fixedly, the other end of positioning screw is connected tube beyond the Great Wall by bearing, and upper limit fixedly runner is connected the inwall of tube, and upper limit fixedly runner rotates with tube.In the tube rotation process, drive the curtain backrush, tube drives upper limit stroke locating wheel and rotates with tube, upper limit stroke locating wheel moves on positioning screw, step on the upper limit stroke locating wheel inserts in the buffer spring of location, and progressively will locate the buffer spring distending, step on the upper limit stroke locating wheel produces friction force with the location buffer spring, the speed of upper limit stroke locating wheel is descended, the speed that drives tube descends, be inserted into the length of locating in the buffer spring along with the step on the upper limit stroke locating wheel, friction force increases, and the speed of tube descends big more, when upper limit stroke locating wheel moves to the positioning screw end face, upper limit stroke locating wheel stops operating, tube also stops operating, and the curtain backrush stops, because the friction force between upper limit stroke locating wheel and the location buffer spring, the curtain backrush is progressively slowed down, avoid trombone slide in the curtain backrush, to collide shell, the elastic force of curtain backrush is born by upper limit stroke locating wheel, prevent the long-term stressed stretcher strain of curtain.
Location curtain backrush upper limit position is regulated in the effect of upper limit positioning regulating mechanism exactly, by regulating the stroke of upper limit stroke locating wheel, can reach the upper limit position of regulating location curtain backrush, the upper limit positioning regulating mechanism is to regulate head to form, regulate head and be connected on the positioning screw, end cap covers on shell, and rotation adjusting head drives positioning screw and rotates, positioning screw rotates upper limit stroke locating wheel is moved, and reaches the upper limit position of regulating location curtain backrush.
The upper limit positioning regulating mechanism is by regulating head, end cap, self-locking spring and spacing regulating wheel are formed, spacing regulating wheel is fixedly connected on the positioning screw, spacing regulating wheel is provided with self-locking spring, regulating head is installed on the spacing regulating wheel, the self-locking spring axle center that is fixed, spacing regulating wheel rotation promotes self-locking spring and can expand outwardly, and the self-locking spring outside surface is adjacent at the self-locking inner surface of outer cover, makes spacing regulating wheel and regulates head by locked, regulating head rotation promotion self-locking spring can inwardly shrink, the self-locking spring outside surface breaks away from the self-locking inner surface of outer cover, and self-locking spring is followed and regulated the head rotation, drives spacing regulating wheel and rotates, spacing regulating wheel drives positioning screw and rotates, because tube is static, positioning screw rotates and drives upper limit stroke locating wheel, reaches the upper limit position of regulating location curtain backrush.
The upper limit positioning regulating mechanism is the regulating tank that is provided with on the positioning screw end face, adopts throw to rotate regulating tank and drives the positioning screw rotation, and positioning screw rotates upper limit stroke locating wheel is moved, and reaches the upper limit position of regulating location curtain backrush.
The utility model use simple in structure, can control the upper limit position of the curtain backrush of projection screen, in the curtain backrush buffer action is arranged during to upper limit position, avoid trombone slide in the curtain backrush, to collide shell, preventing that backrush elastic force from acting on the curtain, is a kind of projection screen that can regulate the upper limit location.
Description of drawings
Accompanying drawing 1 is an example structure synoptic diagram of the present utility model.
Accompanying drawing 2 is upper limit detent mechanism synoptic diagram of the present utility model.
Accompanying drawing 3 is self-locking spring structural representations of the present utility model.
Accompanying drawing 4 is upper limit positioning regulating mechanism structural representations of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, it is fixedly runner 1 of upper limit for the utility model, upper limit stroke locating wheel 2, positioning screw 3, location buffer spring 4, connect rivet 5, tube plug rotor 6, end cap 7, self-locking spring 9, regulate 10, spacing regulating wheel 11, self-locking shell 13, from locking closure 12, bearing 14, tube plug 15, trombone slide 18, curtain 19, tube 20 and shell 21 are formed, trombone slide is connected an end of curtain, the other end of curtain is connected on the tube, rotation by tube with the curtain backrush on tube, the tube setting in the enclosure, in tube, be provided with upper limit detent mechanism and upper limit positioning regulating mechanism, the upper limit detent mechanism is by upper limit stroke locating wheel, upper limit is runner fixedly, positioning screw, the location buffer spring is formed, the center screw of upper limit stroke locating wheel cooperates with positioning screw, upper limit stroke locating wheel moves on positioning screw, be provided with locator card 17 at positioning screw one end, one end locator card place is provided with fixedly runner of upper limit at positioning screw, upper limit is an end of runner support positioning screw fixedly, the other end of positioning screw is connected on the tube plug rotor 6 by connecting rivet 5, tube plug 15 is installed on the bearing 14, Bearing Installation is on tube plug rotor, upper limit fixedly runner and tube plug rotates with tube, is mounted with the location buffer spring at the other end of positioning screw, and a step is arranged on the upper limit stroke locating wheel, step is provided with a chamfer, step can insert in the buffer spring of location, and upper limit stroke locating wheel is connected the inwall of tube, and upper limit stroke locating wheel rotates with tube, in the tube rotation process, drive the curtain backrush, upper limit stroke locating wheel moves on positioning screw, and the step on the upper limit stroke locating wheel inserts in the buffer spring of location, and progressively will locate the buffer spring distending, produce friction force, the speed of upper limit stroke locating wheel is descended, and when upper limit stroke locating wheel moved to the positioning screw end face, upper limit stroke locating wheel stopped operating, tube also stops operating, and the curtain backrush stops.The upper limit positioning regulating mechanism is by regulating 10, end cap 7, self-locking spring 9 and spacing regulating wheel 11 are formed, spacing regulating wheel is installed on the tube plug rotor 6, by tube plug rotor with on positioning screw is connected, spacing regulating wheel is provided with self-locking spring, regulating head is installed on the spacing regulating wheel, the self-locking spring axle center that is fixed, the self-locking spring outside surface is adjacent at the self-locking inner surface of outer cover, makes spacing regulating wheel and regulates head by locked, regulating head rotation promotion self-locking spring can inwardly shrink, the self-locking spring outside surface breaks away from the self-locking inner surface of outer cover, and self-locking spring is followed and regulated the head rotation, drives spacing regulating wheel and rotates, spacing regulating wheel drives positioning screw and rotates, because tube is static, positioning screw rotates and drives upper limit stroke locating wheel, reaches the upper limit position of regulating location curtain backrush.
As shown in Figure 2, the utility model upper limit detent mechanism is by upper limit stroke locating wheel 2, upper limit is runner 1 fixedly, positioning screw 3, location buffer spring 4 is formed, the center screw of upper limit stroke locating wheel cooperates with positioning screw, upper limit stroke locating wheel moves on positioning screw, be provided with locator card 17 at positioning screw one end, one end locator card place is provided with fixedly runner of upper limit at positioning screw, upper limit is an end of runner support positioning screw fixedly, the other end of positioning screw is connected on the tube plug rotor 6 by connecting rivet 5, Bearing Installation is on tube plug rotor, upper limit fixedly runner and tube plug rotates with tube 20, the other end at positioning screw is mounted with the location buffer spring, a step is arranged on the upper limit stroke locating wheel, step is provided with a chamfer, step can insert in the buffer spring of location, upper limit stroke locating wheel is connected the inwall of tube, upper limit stroke locating wheel rotates with tube, upper limit stroke locating wheel moves on positioning screw, step on the upper limit stroke locating wheel progressively inserts in the buffer spring of location, and will locate the buffer spring distending, and produce friction force, the speed of upper limit stroke locating wheel is descended, when upper limit stroke locating wheel moves to the positioning screw end face, upper limit stroke locating wheel stops operating, and tube also stops operating, and the curtain backrush stops.When the tube backward rotation, upper limit stroke locating wheel rotates with tube, upper limit stroke locating wheel moves on positioning screw, step on the upper limit stroke locating wheel progressively breaks away from the location buffer spring, when upper limit stroke locating wheel moves to upper limit fixedly during runner, upper limit stroke locating wheel stops operating, and tube also stops operating.
As shown in Figure 3, the self-locking spring 9 of the utility model upper limit positioning regulating mechanism, when the adjusting head is not influenced by external force, the self-locking spring axle center that is fixed, the self-locking spring outside surface is adjacent on the self-locking inner surface of outer cover, the effect rotation that spacing regulating wheel is subjected to tube backrush power promotes self-locking spring A towards outer expansion, the self-locking spring outside surface is adjacent at the self-locking inner surface of outer cover, make spacing regulating wheel by locked, when the adjusting head is rotated by the external force effect, regulate head and rotate promotion self-locking spring B towards interior contraction, the self-locking spring outside surface breaks away from the self-locking inner surface of outer cover, and self-locking spring is followed and regulated the head rotation, and self-locking spring is followed and regulated the head rotation, drive spacing regulating wheel and rotate, spacing regulating wheel drives positioning screw and rotates.
At spacing regulating wheel with regulate between the head self-locking spring is set, self-locking spring is the axle center because the restriction of self-locking shell is fixed, and spacing regulating wheel can only promote self-locking spring A face by applied thrust, regulates head and can only rotate promotion self-locking spring B face.
As shown in Figure 4, the utility model upper limit positioning regulating mechanism is by regulating 10, self-locking spring 9 and spacing regulating wheel 11, self-locking shell 13, form from locking closure 12, spacing regulating wheel is with on positioning screw is connected, spacing regulating wheel is provided with self-locking spring, self-locking spring is by the fixing axle center of self-locking shell, on spacing regulating wheel, groove is arranged, regulate head and be installed on the spacing regulating wheel, regulate head and be inserted in the groove of spacing regulating wheel, the self-locking spring outside surface is adjacent at the self-locking inner surface of outer cover, the adjusting head rotates a promotion self-locking spring and inwardly shrinks, and the self-locking spring outside surface breaks away from the self-locking inner surface of outer cover, and self-locking spring is followed the rotation of adjusting head, drive spacing regulating wheel and rotate, spacing regulating wheel drives positioning screw and rotates.
Claims (9)
1, the projection screen of a kind of upper limit location, it is by trombone slide, curtain, tube and shell are formed, trombone slide is connected an end of curtain, the other end of curtain is connected on the tube, rotation by tube on tube, is characterized in that being provided with upper limit detent mechanism and upper limit positioning regulating mechanism with the curtain backrush in tube, the upper limit detent mechanism is by upper limit stroke locating wheel, positioning screw, the location buffer spring is formed, and upper limit stroke locating wheel cooperates with positioning screw, and upper limit stroke locating wheel moves on positioning screw, be provided with locator card at positioning screw one end, the other end at positioning screw is mounted with the location buffer spring, has a step, step can insert in the buffer spring of location on the upper limit stroke locating wheel, upper limit stroke locating wheel is connected the inwall of tube, and upper limit stroke locating wheel rotates with tube.
2, the projection screen of upper limit according to claim 1 location is characterized in that at positioning screw one end fixedly runner of a upper limit being set, and upper limit is an end of runner support positioning screw fixedly, and the other end of positioning screw is connected tube beyond the Great Wall by bearing.
3, the projection screen of upper limit according to claim 1 location is characterized in that step is provided with a chamfer.
4, the projection screen of upper limit according to claim 1 location is characterized in that the upper limit positioning regulating mechanism is to regulate head to form, and regulates head and is connected on the positioning screw.
5, the projection screen of upper limit according to claim 1 location, it is characterized in that the upper limit positioning regulating mechanism is by regulating head, self-locking spring and spacing regulating wheel are formed, spacing regulating wheel is fixedly connected on the positioning screw, spacing regulating wheel is provided with self-locking spring, regulate head and be installed on the spacing regulating wheel, the self-locking spring axle center that is fixed.
6, the projection screen of upper limit according to claim 1 location, it is characterized in that the upper limit positioning regulating mechanism is by regulating head, self-locking spring and spacing regulating wheel, the self-locking shell, form from locking closure, spacing regulating wheel is with on positioning screw is connected, spacing regulating wheel is provided with self-locking spring, self-locking spring is by the fixing axle center of self-locking shell, on spacing regulating wheel, groove is arranged, regulate head and be installed on the spacing regulating wheel, regulate head and be inserted in the groove of spacing regulating wheel, the self-locking spring outside surface is adjacent at the self-locking inner surface of outer cover.
7, the projection screen of upper limit according to claim 1 location is characterized in that the upper limit positioning regulating mechanism is the regulating tank that is provided with on the positioning screw end face.
8, the projection screen of upper limit according to claim 2 location is characterized in that the other end of positioning screw is connected on the tube plug rotor by connecting rivet, and the tube plug is installed on the bearing, and Bearing Installation is on tube plug rotor.
9, the projection screen of upper limit according to claim 5 location is characterized in that spacing regulating wheel is installed on the tube plug rotor, is connected with positioning screw by tube plug rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082969 CN2720484Y (en) | 2004-08-13 | 2004-08-13 | Upper-spacing positioned projection screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082969 CN2720484Y (en) | 2004-08-13 | 2004-08-13 | Upper-spacing positioned projection screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720484Y true CN2720484Y (en) | 2005-08-24 |
Family
ID=35009442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420082969 Expired - Lifetime CN2720484Y (en) | 2004-08-13 | 2004-08-13 | Upper-spacing positioned projection screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2720484Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837965A (en) * | 2015-12-10 | 2017-06-13 | 孙莉新 | A kind of installation for wall hanging piece locks cylinder device |
-
2004
- 2004-08-13 CN CN 200420082969 patent/CN2720484Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837965A (en) * | 2015-12-10 | 2017-06-13 | 孙莉新 | A kind of installation for wall hanging piece locks cylinder device |
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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: 20140813 Granted publication date: 20050824 |