CN216901306U - Projector - Google Patents

Abstract

The utility model provides a projector, which comprises a projector body, wherein a handle is arranged on the projector, the handle is rotatably arranged on a support, a driving wheel is arranged on the support, the handle is connected with the driving wheel, the driving wheel is connected with a driven wheel through a belt, the driven wheel is connected with an encoder on the same rotating shaft, the encoder is electrically connected with a controller, when the rotating shaft drives the encoder to rotate, the encoder generates a corresponding electric signal according to the rotating speed and transmits the electric signal to the controller, and the controller is connected with a projection device for playing videos. The utility model designs a projector which is antique but has the prior art, the speed of an encoder is adjusted by shaking a handle, and then the playing speed of a film is adjusted, so that a visitor can feel 'history' smell when watching history image-text data, and the projector has very good educational significance.

Description

Projector

Technical Field

The utility model relates to the technical field of reflection machines, in particular to a projector.

Background

In places such as museums, science and education bases, cultural exhibitions and the like, videos are often required to be played to display historical image-text data, in the prior art, projectors are generally adopted to play the videos directly, and the playing mode lacks of a 'history' concept. However, if the old-fashioned hand-operated projector is adopted to pursue the feeling of history, the problems of unclear playing picture and inconvenient operation exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a projector.

In order to realize the purpose, the following technical scheme is adopted:

a projector comprises a projector body, wherein a handle is arranged on the projector and is rotatably arranged on a support, a driving wheel is arranged on the support and is connected with the driving wheel, the driving wheel is connected with a driven wheel through a belt, the driven wheel is connected with an encoder on the same rotating shaft, the encoder is electrically connected with a controller, when the rotating shaft drives the encoder to rotate, the encoder generates a corresponding electric signal according to the rotating speed and transmits the electric signal to the controller, and the controller is connected with a projection device for playing videos.

Furthermore, one side of the bracket is also provided with an idler pulley and a connecting rod which drives the idler pulley to press the belt. Utilize the idler to press to the belt, adjust the elasticity of belt, and then can adjust hand-cranking dynamics.

Furthermore, two support frames are arranged on one side of the support frame, limiting grooves are formed in the support frames, limiting columns are arranged on two sides of the idler wheel respectively and penetrate through the limiting grooves, one end of the connecting rod is connected with the idler wheel of the projector through threads, the other end of the connecting rod is limited on a fixing block, and the fixing block is fixed on a shell. When the connecting rod is rotated, the head of the connecting rod is limited in the fixed block, namely the head of the connecting rod is kept unmoved, so that the connecting rod can push the idler pulley to move back and forth, and the tightness adjustment of the idler pulley on the belt is realized.

Further, the support, the action wheel, follow driving wheel, the belt, the idler, the encoder all accomodate inside the casing. On the one hand, to protect the above-mentioned parts and, on the other hand, to avoid being seen by the viewer.

Furthermore, the projection device is arranged on the projector, the projector is also provided with a projection lens, and the projection device reads video data in a video tape and transmits the video data to the projection lens.

By adopting the scheme, the utility model has the beneficial effects that: a projector which is antique but has the prior art is designed, the speed of an encoder is adjusted by shaking a handle, and then the playing speed of a film is adjusted, so that visitors can feel 'history' smell when watching history image-text data, and the projector has very good educational significance.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of part A in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a housing according to an embodiment of the utility model.

Wherein the figures identify the description:

1. a projector; 2. a handle; 3. a support; 4. a driving wheel; 5. a belt; 6. a driven wheel; 7. an encoder; 8. a rotating shaft; 9. a projection device; 10. an idler pulley; 11. a connecting rod; 12. a support frame; 13. a limiting groove; 14. a fixed block; 15. a housing; 16. a projection lens; 17. a limiting column.

Detailed Description

Exemplary embodiments that embody features and advantages of the utility model are described in detail below in the specification. It is to be understood that the utility model is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the utility model and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

As shown in fig. 1 to 3, a projector 1 includes a projector 1, a handle 2 is disposed on the projector 1, the handle 2 is rotatably disposed on a support 3, a driving wheel 4 is disposed on the support 3, the handle 2 is connected with the driving wheel 4, the driving wheel 4 is connected with a driven wheel 6 through a belt 5, the driven wheel 6 is connected with an encoder 7 on a same rotating shaft 8, the encoder 7 is electrically connected with a controller, when the rotating shaft 8 drives the encoder 7 to rotate, the encoder 7 generates a corresponding electrical signal according to the rotating speed and transmits the electrical signal to the controller, and the controller is connected with a projection device 9 for playing video.

It should be noted that the projection device 9 may be a part of the projector 1, or may be separately installed from the projector 1, and the controller may be connected to the projection device 9 through a wire, or may be connected through bluetooth, infrared, cellular mobile network, or the like, which is not limited to the present invention.

One side of the bracket 3 is also provided with an idler pulley 10 and a connecting rod 11 which drives the idler pulley 10 against the belt 5. The idler pulley 10 is pressed towards the belt 5, the tightness of the belt 5 is adjusted, and then the hand-cranking force can be adjusted.

Two support frames 12 are arranged on one side of the support 3, limiting grooves 13 are formed in the support frames 12, limiting posts 17 are arranged on two sides of the idler 10 respectively, the limiting posts 17 penetrate the limiting grooves 13, one end of the connecting rod 11 is connected with the idler 10 through threads, the other end of the connecting rod 11 is limited on a fixing block 14, and the fixing block 14 is fixed on a shell 15. When the connecting rod 11 is rotated, because the head of the connecting rod 11 is limited in the fixing block 14, that is, the head of the connecting rod 11 is kept unmoved, the connecting rod 11 can push the idler pulley 10 to move back and forth, and the tightness adjustment of the idler pulley 10 on the belt 5 is realized.

The holder 3, the driving pulley 4, the driven pulley 6, the belt 5, the idler pulley 10, and the encoder 7 are all housed inside the case 15. On the one hand, to protect the above-mentioned parts and, on the other hand, to avoid being seen by the viewer.

The projector 1 is provided with a projection device 9, the projector 1 is further provided with a projection lens 16, and the projection device 9 reads video data in a video tape and transmits the video data to the projection lens 16.

Description of the principle: according to the characteristics of the used projection device 9, carriers such as an optical disc and a video tape are selected to be placed in a playing bin of the projection device 9, the projection device 9 projects a video through a projection lens 16, then the handle 2 is shaken, the handle 2 drives the driving wheel 4 to rotate, further the belt 5 drives the driven wheel 6 to rotate, the driven wheel 6 drives the rotating shaft 8, the rotating shaft 8 drives the encoder 7 to rotate, the encoder 7 generates a corresponding electric signal according to the selection rate, and after the controller receives the electric signal, the playing rate of the projection device is controlled according to the electric signal.

From the above embodiments, the projector 1 of the present invention, which is antique, but has the prior art, is designed, and the speed of the encoder 7 is adjusted by swinging the handle 2, so as to adjust the playing speed of the film, so that a visitor can feel 'history' information when watching history image-text data, and the present invention has a very good educational significance.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (5)

1. A projector is characterized by comprising a projector body, wherein a handle is arranged on the projector and is rotatably arranged on a support, a driving wheel is arranged on the support and is connected with the driving wheel, the driving wheel is connected with a driven wheel through a belt, the driven wheel is connected with an encoder on the same rotating shaft, the encoder is electrically connected with a controller, when the rotating shaft drives the encoder to rotate, the encoder generates a corresponding electric signal according to the rotating speed and transmits the electric signal to the controller, and the controller is connected with a projection device for playing videos.

2. A projector as in claim 1, wherein said frame is further provided with an idler pulley on one side and a connecting rod for driving said idler pulley toward said belt.

3. The projector as claimed in claim 2, wherein the bracket has two support frames at one side thereof, the support frames have a position-limiting groove, the idle rollers have position-limiting posts at both sides thereof, the position-limiting posts pass through the position-limiting groove, one end of the connecting rod is connected to the idle roller of the projector by a screw, the other end of the connecting rod is fixed to a fixing block, and the fixing block is fixed to a housing.

4. A projector as set forth in claim 3 wherein said carriage, said drive pulley, said driven pulley, said belt, said idler pulley, and said encoder are all housed within said housing.

5. The projector as claimed in claim 1, wherein the projection device is disposed on the projector, and the projector is further disposed with a projection lens, and the projection device reads video data in a video tape and transmits the video data to the projection lens.

Images