CN114299768A - Projection curtain device for Chinese language and literature teaching - Google Patents
Projection curtain device for Chinese language and literature teaching Download PDFInfo
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- CN114299768A CN114299768A CN202111584888.4A CN202111584888A CN114299768A CN 114299768 A CN114299768 A CN 114299768A CN 202111584888 A CN202111584888 A CN 202111584888A CN 114299768 A CN114299768 A CN 114299768A
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Abstract
The invention discloses a projection screen device for Chinese language and literature teaching, which belongs to the field of projection equipment and comprises a mounting box, wherein the bottom surface of the mounting box is fixedly connected with a mounting rod, the bottom of the mounting rod is fixedly connected with a mounting seat, the mounting box is fixedly connected with a motor, the output end of the motor is fixedly connected with a receiving shaft, projection cloth is fixedly connected onto the receiving shaft, the mounting box is provided with a cleaning mechanism for cleaning the projection cloth, the cleaning mechanism comprises a first gear and a second gear which are rotatably connected onto the mounting rod, the cleaning mechanism is arranged to ensure that the projection cloth is clean, the effect that a projection picture cannot be dirty due to dirtying of the projection cloth is achieved, the leveling mechanism is arranged to achieve the effect that the projection cloth can be leveled when being released, the side edge of the projection cloth is fixed by arranging a clamping mechanism, the effect that the projection cloth is not lifted by wind is achieved.
Description
Technical Field
The invention relates to the technical field of projection equipment, in particular to a projection screen device for Chinese language and literature teaching.
Background
The Chinese language and literature specialty culture has basic theory, basic knowledge and basic skill of Chinese language and literature, and can be used in news literature publishing departments, scientific research institutions and organs, enterprises and public institutions to perform literature evaluation, Chinese language and literature teaching and research works, and practical works in culture and propaganda, the specialty corresponding to Chinese language and literature is language education, the culture object is teachers, teaching researchers and other education works for Chinese language and literature teaching and teaching research in high and medium schools, and the specialty is culture of Chinese language and literature knowledge with literature theoretical literacy and system.
Teaching usually occurs in a classroom, and when a projection cloth installed in a teacher is used, dust or chalk powder is usually attached to the projection cloth, so that the projection cloth becomes dirty, and the definition of a projection picture is further influenced.
Disclosure of Invention
The invention aims to provide a projection screen device for Chinese language and literature teaching, which has the advantage of ensuring the cleanness of projection cloth and solves the problem that projection pictures are affected due to the dirtying of the projection cloth after long-term use.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a projection curtain cloth device that chinese language and literature teaching was used, includes the mounting box, fixedly connected with installation pole on the bottom surface of mounting box, the bottom fixedly connected with mount pad of installation pole, fixedly connected with motor on the mounting box, the axle is accomodate to the output fixedly connected with of motor, accomodate epaxial fixedly connected with projection cloth, be equipped with on the mounting box and be used for the cleanness the clean mechanism of projection cloth, clean mechanism is connected including rotating first gear and second gear on the installation pole, first gear with the meshing of second gear, first gear with equal fixedly connected with U type frame on the second gear, equal fixedly connected with is used for clearing up on two U type frames the brush hair of projection cloth front and reverse side.
Preferably, clean mechanism still includes sliding connection and is in accomodate epaxial third gear, fixedly connected with mounting bracket on the mounting box, the first spring of fixedly connected with on the mounting bracket, sliding connection has the rack on the mounting box, the bottom fixed connection of first spring is in on the rack, the rack with third gear engagement, fixedly connected with depression bar on the rack, the depression bar with be located U type frame intermittent type on the first gear offsets.
Preferably, the cleaning mechanism further comprises a rotating rod fixedly connected to the first gear, a limiting ring is fixedly connected to the rotating rod, a torsion spring is sleeved on the rotating rod, and two ends of the torsion spring are respectively and fixedly connected to the mounting box and the limiting ring.
Preferably, be equipped with on the mount pad and be used for preventing the mechanism of flare-outing of projection cloth fold, flare-outing mechanism includes sliding connection and is in rectangular block on the mount pad, it is connected with the pivot to rotate on the rectangular block, fixedly connected with accomodates the roller in the pivot, accomodate fixedly connected with stay cord on the roller, the bottom fixedly connected with horizontal pole of projection cloth, keep away from on the stay cord the one end fixed connection who accomodates the roller is in on the horizontal pole.
Preferably, the leveling mechanism further comprises a magnetic stop block which is connected to the mounting seat in a sliding mode, the magnetic stop block intermittently offsets with the rotating shaft, a metal L plate is fixedly connected to the cross rod, the magnetic stop block intermittently attracts with the metal L plate, a vertical plate is fixedly connected to the magnetic stop block, a first telescopic rod is fixedly connected to the vertical plate, the first telescopic rod is fixedly connected to the mounting seat, a second spring is sleeved on the first telescopic rod, and two ends of the second spring respectively offset with the mounting seat and the vertical plate.
Preferably, the leveling mechanism further comprises a rectangular sliding block fixedly connected to the cross rod, the rectangular sliding block is slidably connected to the mounting rod, a second telescopic rod is fixedly connected to the rectangular block, the top of the second telescopic rod is fixedly connected to the mounting seat, a third spring is sleeved on the second telescopic rod, and two ends of the third spring respectively abut against the mounting seat and the rectangular block.
Preferably, the leveling mechanism further comprises a driving wheel fixedly connected to the storage shaft and a fixed connection to the storage shaft, a rotating shaft is arranged on the driven wheel, a belt is arranged on the driving wheel, the driving wheel passes through the belt and is connected with the driven wheel in a transmission mode, a rectangular cylinder is fixedly connected to the installation rod, two expansion blocks are symmetrically and slidably connected to the rectangular cylinder and are attached to the belt in a laminating mode, two expansion blocks are fixedly connected to a third telescopic rod between the expansion blocks, a fourth spring is sleeved on the third telescopic rod, and two ends of the fourth spring are respectively abutted to the expansion blocks.
Preferably, the leveling mechanism is provided with a clamping mechanism for fixing the projection cloth, the clamping mechanism comprises a cylindrical rod rotatably connected to the mounting seat, a spiral groove is formed in the lower section of the cylindrical rod, an insertion rod is fixedly connected to the rectangular block and slidably connected to the spiral groove in the cylindrical rod, a clamping plate is fixedly connected to the cylindrical rod, and the clamping plate intermittently abuts against the projection cloth.
Compared with the prior art, the invention has the following beneficial effects:
1. the cleaning mechanism is arranged to ensure that the projection cloth is clean, the effect that a projection picture cannot be unclear due to the fact that the projection cloth becomes dirty is achieved, the leveling mechanism is arranged to achieve the effect that the projection cloth can be leveled when the projection cloth is released, and the clamping mechanism is arranged to fix the side edge of the projection cloth, so that the effect that the projection cloth cannot be lifted up due to wind blowing is achieved.
Drawings
FIG. 1 is a first general structural diagram of the present invention;
FIG. 2 is a schematic structural view of portion A of FIG. 1 according to the present invention;
FIG. 3 is a second schematic diagram of the overall structure of the present invention;
FIG. 4 is a schematic view of the structure at the motor of the present invention;
FIG. 5 is a schematic structural view of portion B of FIG. 4 according to the present invention;
FIG. 6 is a schematic view of the present invention at the splint site;
FIG. 7 is a schematic structural view of portion C of FIG. 6 according to the present invention;
FIG. 8 is a schematic view of the structure of the present invention at the location of a metal L-plate;
fig. 9 is a schematic structural view of the rectangular cylinder of the present invention.
In the figure: 1. mounting a box; 11. mounting a rod; 12. a mounting seat; 121. a magnetic stopper; 122. a vertical plate; 123. a first telescopic rod; 124. a second spring; 2. a motor; 21. a storage shaft; 211. a third gear; 22. a projection cloth; 23. a cross bar; 231. a rectangular slider; 232. a metal L plate; 24. a mounting frame; 241. a first spring; 25. a rack; 26. a pressure lever; 3. a rotating rod; 31. a first gear; 32. a U-shaped frame; 321. brushing; 33. a second gear; 35. a torsion spring; 36. a limiting ring; 4. a rectangular cylinder; 41. an expansion block; 42. a third telescopic rod; 421. a fourth spring; 43. a driving wheel; 44. a driven wheel; 45. a belt; 5. a rotating shaft; 51. a receiving roller; 52. pulling a rope; 53. a rectangular block; 531. a second telescopic rod; 532. a third spring; 533. inserting a rod; 54. a cylindrical rod; 541. and (4) clamping the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: a projection screen cloth device for Chinese language and literature teaching comprises a mounting box 1, a mounting rod 11 is fixedly connected to the bottom surface of the mounting box 1, a mounting seat 12 is fixedly connected to the bottom of the mounting rod 11, a motor 2 is fixedly connected to the mounting box 1, an output end of the motor 2 is fixedly connected with a receiving shaft 21, a projection cloth 22 is fixedly connected to the receiving shaft 21, a cleaning mechanism for cleaning the projection cloth 22 is arranged on the mounting box 1, the cleaning mechanism comprises a first gear 31 and a second gear 33 which are rotatably connected to the mounting rod 11, the first gear 31 is meshed with the second gear 33, U-shaped frames 32 are fixedly connected to the first gear 31 and the second gear 33, bristles 321 for cleaning the front surface and the back surface of the projection cloth 22 are fixedly connected to the two U-shaped frames 32, the cleaning mechanism further comprises a third gear 211 which is slidably connected to the receiving shaft 21, a mounting frame 24 is fixedly connected to the mounting box 1, first spring 241 of fixedly connected with on the mounting bracket 24, sliding connection has rack 25 on the mounting box 1, the bottom fixed connection of first spring 241 is on rack 25, rack 25 and the meshing of third gear 211, fixedly connected with depression bar 26 on the rack 25, depression bar 26 offsets with the U type frame 32 intermittent type that is located on first gear 31, clean mechanism still includes bull stick 3 of fixed connection on first gear 31, fixedly connected with spacing ring 36 on the bull stick 3, the noose has torsional spring 35 on the bull stick 3, the both ends difference fixed connection of torsional spring 35 is on mounting box 1 and spacing ring 36.
Referring to fig. 1, 3, 4 and 5, while the receiving shaft 21 rotates clockwise to wind the projection cloth 22, the rack 25 engaged with the third gear 211 is driven by the third gear 211 rotating synchronously with the receiving shaft 21 to overcome the pulling force of the first spring 241 to move downward, and then the pressing rod 26 fixedly connected to the rack 25 presses the U-shaped frame 32 on the first gear 31, so that the bristles 321 on the U-shaped frame 32 are attached to the projection cloth 22, and the projection cloth 22 is wound and contacted with the bristles 321, and further the bristles 321 can sweep dust and the like on the projection cloth 22 down, and ensure that the projection cloth 22 is clean, so that the projection picture cannot become dirty and unclear because the length of the projection cloth 22 is limited, and the third gear 211 is always in a rotating state, and further the rack 25 is driven by the rotating third gear 211 to slide to the bottom, and the rack 25 does not slide any more, and because the first spring 241 has a pulling force on the rack 25 at this time, and then the rack 25 has a tendency of moving upward, and then teeth on the third gear 211 intermittently contact teeth on the uppermost portion of the rack 25 when the rack 25 slides to the bottommost portion, so that the rack 25 shakes up and down, and then the pressing rod 26 shakes up and down synchronously with the rack 25, and the U-shaped frame 32 also shakes by matching with the acting force of the torsion spring 35, and the brush 321 has a sufficient length, and then the brush 321 can always contact the projection cloth 22 when the U-shaped frame 32 shakes, so as to ensure the cleaning effect on the projection cloth 22, and the shake of the U-shaped frame 32 can be transmitted to the projection cloth 22, so that dust adhered to the brush 321 is shaken off, and on the other hand, the dust on the projection cloth 22 can also be partly shaken off.
Example two
On the basis of the first embodiment, further, a leveling mechanism for preventing the projection cloth 22 from wrinkling is arranged on the mounting base 12, the leveling mechanism includes a rectangular block 53 slidably connected to the mounting base 12, a rotating shaft 5 is rotatably connected to the rectangular block 53, a storage roller 51 is fixedly connected to the rotating shaft 5, a pull rope 52 is fixedly connected to the storage roller 51, a cross rod 23 is fixedly connected to the bottom of the projection cloth 22, and one end of the pull rope 52, far away from the storage roller 51, is fixedly connected to the cross rod 23.
Referring to fig. 1, 2, 6, 7 and 8, the starting motor 2 controls the storage shaft 21 to rotate to store and release the projection cloth 22, referring to fig. 4 and 5, controls the storage shaft 21 to rotate counterclockwise to release the projection cloth 22, when the storage shaft 21 rotates counterclockwise, the third gear 211 fixedly connected to the storage shaft 21 rotates counterclockwise at the same time, at this time, the rack 25 engaged with the third gear 211 is driven by the third gear 211 rotating counterclockwise to slide upward, and then the pressing rod 26 fixedly connected to the rack 25 gradually moves away from the U-shaped frame 32 on the first gear 31, and at this time, the U-shaped frame 32 is no longer pressed by the pressing rod 26, so that the rotating rod 3 rotates counterclockwise under the action of the torsion spring 35, and then the first gear 31 fixedly connected to the rotating rod 3 rotates counterclockwise, and the second gear 33 is engaged with the first gear 31, and then the second gear 33 rotates along with the pointer, and at this time, the U-shaped frame 32 fixedly connected to the first gear 31 moves along with the first gear 31, the U-shaped frames 32 fixedly connected to the second gear 33 move along with the second gear 33, so that the bristles 321 on the two U-shaped frames 32 gradually move away from the projection cloth 22, and the projection cloth 22 is released without being subjected to the friction force generated by the contact with the bristles 321.
The leveling mechanism further comprises a magnetic stop block 121 connected to the mounting seat 12 in a sliding mode, the magnetic stop block 121 intermittently offsets with the rotating shaft 5, a metal L plate 232 is fixedly connected to the cross rod 23, the magnetic stop block 121 and the metal L plate 232 intermittently attract each other, a vertical plate 122 is fixedly connected to the magnetic stop block 121, a first telescopic rod 123 is fixedly connected to the vertical plate 122, the first telescopic rod 123 is fixedly connected to the mounting seat 12, a second spring 124 is sleeved on the first telescopic rod 123, and two ends of the second spring 124 respectively offset with the mounting seat 12 and the vertical plate 122.
Referring to fig. 1, 2, 6, 7 and 8, when the storage shaft 21 rotates, the driving wheel 43 fixedly connected to the storage shaft 21 rotates, the driven wheel 44 in transmission connection with the driving wheel 43 through the belt 45 is driven by the driving wheel 43 to rotate, and further, the rotating shaft 5 fixedly connected to the driven wheel 44 rotates, and further, the storage roller 51 fixedly connected to the rotating shaft 5 rotates, the rotating storage roller 51 stores the pull rope 52, and the pull rope 52 is fixedly connected to the cross bar 23 at the bottom of the projection cloth 22, and further, when the storage shaft 21 rotates to release the projection cloth 22, the pull rope 52 pulls the cross bar 23 at the bottom of the projection cloth 22, so that the projection cloth 22 can be smoothly released, and further, the projection cloth 22 is guaranteed not to be clamped in the mounting box 1.
The leveling mechanism further comprises a rectangular sliding block 231 fixedly connected to the cross rod 23, the rectangular sliding block 231 is connected to the mounting rod 11 in a sliding mode, a second telescopic rod 531 is fixedly connected to the rectangular block 53, the top of the second telescopic rod 531 is fixedly connected to the mounting seat 12, a third spring 532 is sleeved on the second telescopic rod 531, and two ends of the third spring 532 respectively abut against the mounting seat 12 and the rectangular block 53.
Referring to fig. 1, 2, 6, 7 and 8, when the cross bar 23 is pulled, the metal L plate 232 fixedly connected to the cross bar 23 approaches the mounting seat 12 synchronously, and then when the metal L plate 232 is in the magnetic force absorption range of the magnetic block 121, the magnetic block 121 attracts the metal L plate 232, because the rectangular sliders 231 at the two ends of the cross bar 23 slide on the mounting rod 11, and further when the metal L plate 232 magnetically attracts the magnetic block 121, the horizontal distance between the metal L plate 232 and the mounting seat 12 does not change, and further the magnetic block 121 approaches the metal L plate 232 against the elastic force of the second spring 124, and then the magnetic block 121 no longer blocks the shaft 5, because the shaft 5 rotates on the rectangular block 53, and the rectangular block 53 slides on the mounting seat 12, and further when the shaft 5 is no longer blocked by the magnetic block 121, the rectangular block 53 slides downwards due to the elastic force of the third spring 532, and then pivot 5 and rectangular block 53 slide downwards in step, the roller 51 of accomodating on the pivot 5 this moment slides downwards in step with pivot 5, and then accomodate roller 51 and carry out further tractive through stay cord 52 to horizontal pole 23 on the projection cloth 22, make the further quilt of projection cloth 22 levelled, guarantee the projection quality, the setting of third spring 532 can make projection cloth 22 still tighten after being released completely simultaneously, avoid using for a long time that projection cloth 22 receives the gravity tenesmus of horizontal pole 23 and its self weight and deformation.
The leveling mechanism still includes that fixed connection takes in the epaxial action wheel 43 of axle 21 and fixed connection from the driving wheel 44 in pivot 5, be equipped with belt 45 on the action wheel 43, and action wheel 43 passes through belt 45 and is connected with the transmission from driving wheel 44, fixedly connected with rectangular cylinder 4 on the installation pole 11, symmetrical sliding connection has two expansion blocks 41 in the rectangular cylinder 4, two expansion blocks 41 all laminate with belt 45, fixedly connected with third telescopic link 42 between two expansion blocks 41, the cover has tied up fourth spring 421 on the third telescopic link 42, the both ends of fourth spring 421 offset with two expansion blocks 41 respectively.
Referring to fig. 1, 2, 6, 7, 8 and 9, when the rotating shaft 5 moves downward, the driven wheel 44 also moves downward, at this time, the belt 45 is tightened, and then the tightened belt 45 applies a pushing force to the expanding block 41, so that the expanding block 41 slides toward the rectangular cylinder 4 against the elastic force of the fourth spring 421, and when the belt 45 is loosened, the expanding block 41 is prevented from being pushed out by the elastic force of the fourth spring 421, so that the expanding block 41 applies a pushing force to the belt 45, and the belt 45 is ensured to be in a tightened state all the time.
EXAMPLE III
On the basis of the second embodiment, a clamping mechanism for fixing the projection cloth 22 is further arranged on the leveling mechanism, the clamping mechanism includes a cylindrical rod 54 rotatably connected to the mounting base 12, a spiral groove is formed in a lower section of the cylindrical rod 54, an insertion rod 533 is fixedly connected to the rectangular block 53, the insertion rod 533 is slidably connected to the spiral groove of the cylindrical rod 54, a clamping plate 541 is fixedly connected to the cylindrical rod 54, and the clamping plate 541 intermittently abuts against the projection cloth 22.
Referring to fig. 1, 3, 6 and 7, when the rectangular block 53 slides downward by the elastic force of the third spring 532, the rod 533 fixedly connected to the rectangular block 53 descends together with the rectangular block 53, and the rod 533 slides in the spiral groove of the cylindrical rod 54, so that the cylindrical rod 54 rotates, and at this time, the clamp plates 541 on the cylindrical rod 54 are turned over in the direction of the projection cloth 22, as shown in fig. 1, 3 and 6, four clamp plates 541 are symmetrically arranged, and when the cylindrical rod 54 rotates, the two clamp plates 541 oppositely arranged approach each other to clamp the projection cloth 22, so as to fix the side edge of the projection cloth 22, and prevent the projection cloth 22 from being blown by wind to affect the projected picture.
The working principle is as follows: the projection screen cloth device for Chinese language and literature teaching fixes the mounting box 1 and the mounting seat 12 on the wall during mounting, when in use, the starting motor 2 controls the containing shaft 21 to rotate to contain and release the projection cloth 22, referring to fig. 4 and 5, the containing shaft 21 is controlled to rotate anticlockwise to release the projection cloth 22, when the containing shaft 21 rotates anticlockwise, the third gear 211 fixedly connected to the containing shaft 21 rotates anticlockwise simultaneously, the rack 25 engaged with the third gear 211 is driven by the third gear 211 rotating anticlockwise to slide upwards, the pressure lever 26 fixedly connected to the rack 25 gradually leaves away from the U-shaped frame 32 on the first gear 31, and the U-shaped frame 32 is not pressed by the pressure lever 26 any more, so that the rotating lever 3 rotates anticlockwise under the action of the torsion spring 35, the first gear 31 fixedly connected with the rotating lever 3 rotates anticlockwise, and the second gear 33 is engaged with the first gear 31, the second gear 33 rotates along the pointer, the U-shaped frame 32 fixedly connected to the first gear 31 moves along with the first gear 31, and the U-shaped frame 32 fixedly connected to the second gear 33 moves along with the second gear 33, so that the bristles 321 on the two U-shaped frames 32 gradually get away from the projection cloth 22, and the projection cloth 22 is released and is not subjected to friction force generated by contact with the bristles 321;
when the storage shaft 21 rotates, the driving wheel 43 fixedly connected to the storage shaft 21 rotates, the driven wheel 44 in transmission connection with the driving wheel 43 through the belt 45 is driven by the driving wheel 43 to rotate, the rotating shaft 5 fixedly connected with the driven wheel 44 rotates, the storage roller 51 fixedly connected to the rotating shaft 5 rotates, the rotating storage roller 51 stores the pull rope 52, the pull rope 52 is fixedly connected with the cross rod 23 at the bottom of the projection cloth 22, and the pull rope 52 pulls the cross rod 23 at the bottom of the projection cloth 22 when the storage shaft 21 rotates to release the projection cloth 22, so that the projection cloth 22 can be smoothly released, and the projection cloth 22 is guaranteed not to be clamped in the mounting box 1;
when the cross bar 23 is pulled, the metal L plate 232 fixedly connected to the cross bar 23 approaches to the mounting seat 12 synchronously, and further when the metal L plate 232 is in the magnetic attraction range of the magnetic stopper 121, the magnetic stopper 121 attracts the metal L plate 232, because the rectangular sliders 231 at the two ends of the cross bar 23 slide on the mounting rod 11, and further when the metal L plate 232 and the magnetic stopper 121 attract magnetically, the horizontal distance between the metal L plate 232 and the mounting seat 12 does not change, and further the magnetic stopper 121 overcomes the elastic force of the second spring 124 to approach to the metal L plate 232, and further at this time, the magnetic stopper 121 no longer blocks the shaft 5, because the shaft 5 rotates on the rectangular block 53, and the rectangular block 53 slides on the mounting seat 12, and further when the shaft 5 is no longer blocked by the magnetic stopper 121, the rectangular block 53 slides downwards under the elastic force of the third spring 532, and further the shaft 5 and the rectangular block 53 slide downwards synchronously, at the moment, the accommodating roller 51 on the rotating shaft 5 and the rotating shaft 5 synchronously slide downwards, so that the accommodating roller 51 further pulls the cross rod 23 on the projection cloth 22 through the pull rope 52, the projection cloth 22 is further pulled flat, the projection quality is ensured, meanwhile, the arrangement of the third spring 532 can enable the projection cloth 22 to be still tightened after being completely released, and the projection cloth 22 is prevented from being deformed due to the gravity falling and the self weight of the cross rod 23 when being used for a long time;
when the rotating shaft 5 moves downwards, the driven wheel 44 also moves downwards, at this time, the belt 45 is tightened, and then the tightened belt 45 applies thrust to the expansion block 41, so that the expansion block 41 slides towards the rectangular cylinder 4 by overcoming the elastic force of the fourth spring 421, and when the belt 45 is loosened, the expansion block 41 is pushed out by the elastic force of the fourth spring 421, so that the expansion block 41 applies thrust to the belt 45, and further, the belt 45 is ensured to be always in a tightened state.
When the rectangular block 53 slides downwards under the elastic force of the third spring 532, the inserting rod 533 fixedly connected to the rectangular block 53 and the rectangular block 53 descend simultaneously, the inserting rod 533 slides in the spiral groove on the cylindrical rod 54, and then the cylindrical rod 54 rotates, at this time, the clamp plates 541 on the cylindrical rod 54 turn over in the direction of the projection cloth 22, as shown in fig. 1, 3 and 6, four clamp plates 541 are symmetrically arranged, and then when the cylindrical rod 54 rotates, the two clamp plates 541 oppositely arranged approach each other to clamp the projection cloth 22, fix the side edges of the projection cloth 22, and prevent the projection cloth 22 from being blown by wind to affect the projected picture;
when the receiving shaft 21 rotates clockwise in the state of fig. 5, the projection cloth 22 can be wound, the clockwise receiving shaft 21 drives the rotating shaft 5 to rotate, and then the receiving roller 51 on the rotating shaft 5 releases the pull rope 52, so that the winding of the projection cloth 22 is not interfered, when the projection cloth 22 is wound, the cross bar 23 on the projection cloth 22 moves upwards, at this time, the metal L plate 232 is far away from the magnetic stopper 121, and then the magnetic stopper 121 slides towards the direction of the rotating shaft 5 under the action of the second spring 124, and the part of the magnetic stopper 121 in contact with the rotating shaft 5 is provided with an arc transition, and then when the cross bar 23 moves upwards, the receiving roller 51 is pulled through the pull rope 52, and then the rotating shaft 5 fixedly connected with the receiving roller 51 is pulled and moves upwards against the elastic force of the third spring 532, and then the rotating shaft 5 extrudes the magnetic stopper 121, so that the magnetic stopper 121 slides a distance towards the direction far away from the rotating shaft 5, then, when the rotating shaft 5 moves to the upper portion of the magnetic stopper 121, the elastic force of the second spring 124 resets the magnetic stopper 121 again, so that the magnetic stopper 121 blocks the rotating shaft 5 to prevent the rotating shaft 5 from moving downwards, and since the elastic force of the third spring 532 is smaller than the elastic force of the second spring 124, the elastic force of the third spring 532 does not enable the rotating shaft 5 to move downwards when the magnetic stopper 121 is not pulled away from the lower portion of the rotating shaft 5.
When the receiving shaft 21 rotates clockwise to wind the projection cloth 22, the rack 25 engaged with the third gear 211 is driven by the third gear 211 rotating synchronously with the receiving shaft 21 to overcome the tension of the first spring 241 to move downwards, and then the pressing rod 26 fixedly connected to the rack 25 presses the U-shaped frame 32 on the first gear 31, so that the brush 321 on the U-shaped frame 32 is attached to the projection cloth 22, and the projection cloth 22 is contacted with the brush 321 while being wound, and further the brush 321 can sweep dust and the like on the projection cloth 22 down, thereby ensuring that the projection cloth 22 is clean, preventing the projection picture from becoming dirty and unclear due to the projection cloth 22, and meanwhile, because the length of the rack 25 is limited, and the third gear 211 is always in a rotating state, and further, when the rack 25 is driven by the rotating third gear 211 to slide to the bottom, the rack 25 does not slide any more, and because the first spring 241 has tension to the rack 25, further, the rack 25 tends to move upwards, and when the rack 25 slides to the bottommost part, the teeth on the third gear 211 are in intermittent contact with the teeth on the topmost part of the rack 25, so that the rack 25 shakes up and down, further the pressure rod 26 shakes up and down synchronously with the rack 25, the U-shaped frame 32 also shakes by matching with the acting force of the torsion spring 35, the bristles 321 have enough length, and the bristles 321 can always contact with the projection cloth 22 when the U-shaped frame 32 shakes, so that the cleaning effect on the projection cloth 22 is ensured, and the shaking of the U-shaped frame 32 can be transmitted to the projection cloth 22 at the same time, so that the dust adhered to the bristles 321 is shaken off, and the dust on the projection cloth 22 can also be partly shaken off.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a projection curtain device that chinese language and literature teaching was used, includes mounting box (1), its characterized in that: the bottom surface of the mounting box (1) is fixedly connected with a mounting rod (11), the bottom of the mounting rod (11) is fixedly connected with a mounting seat (12), the mounting box (1) is fixedly connected with a motor (2), the output end of the motor (2) is fixedly connected with a receiving shaft (21), the receiving shaft (21) is fixedly connected with projection cloth (22), and the mounting box (1) is provided with a cleaning mechanism for cleaning the projection cloth (22);
clean mechanism is including rotating to be connected first gear (31) and second gear (33) on installation pole (11), first gear (31) with second gear (33) meshing, first gear (31) with equal fixedly connected with U type frame (32) on second gear (33), equal fixedly connected with is used for clearing up brush hair (321) of projection cloth (22) front and reverse side on two U type frames (32).
2. The projection screen device for chinese language and literature teaching of claim 1, wherein: clean mechanism still includes sliding connection and is in third gear (211) on accomodating axle (21), fixedly connected with mounting bracket (24) are gone up in mounting bracket (1), the first spring of fixedly connected with (241) is gone up in mounting bracket (24), sliding connection has rack (25) on mounting bracket (1), the bottom fixed connection of first spring (241) is in on rack (25), rack (25) with third gear (211) meshing, fixedly connected with depression bar (26) are gone up in rack (25), depression bar (26) with be located U type frame (32) intermittent type on first gear (31) offsets.
3. The projection screen device for chinese language and literature teaching of claim 2, wherein: clean mechanism still includes fixed connection and is in bull stick (3) on first gear (31), fixedly connected with spacing ring (36) are gone up in bull stick (3), the noose has torsional spring (35) on bull stick (3), the both ends difference fixed connection of torsional spring (35) be in mounting box (1) with on the spacing ring (36).
4. The projection screen device for chinese language and literature teaching of claim 1, wherein: be equipped with on mount pad (12) and be used for preventing the mechanism of flare-outing of projection cloth (22) fold, flare-outing mechanism includes sliding connection rectangular block (53) on mount pad (12), it is connected with pivot (5) to rotate on rectangular block (53), fixedly connected with accomodates roller (51) on pivot (5), accomodate fixedly connected with stay cord (52) on roller (51), the bottom fixedly connected with horizontal pole (23) of projection cloth (22), keep away from on stay cord (52) the one end fixed connection of accomodating roller (51) is in on horizontal pole (23).
5. The projection screen device for chinese language and literature teaching of claim 4, wherein: the leveling mechanism further comprises a magnetic stop block (121) which is connected to the mounting seat (12) in a sliding mode, the magnetic stop block (121) and the rotating shaft (5) intermittently abut against each other, a metal L plate (232) is fixedly connected to the cross rod (23), the magnetic stop block (121) and the metal L plate (232) intermittently attract each other, a vertical plate (122) is fixedly connected to the magnetic stop block (121), a first telescopic rod (123) is fixedly connected to the vertical plate (122), the first telescopic rod (123) is fixedly connected to the mounting seat (12), a second spring (124) is sleeved on the first telescopic rod (123), and two ends of the second spring (124) respectively abut against the mounting seat (12) and the vertical plate (122).
6. The projection screen device for chinese language and literature teaching of claim 5, wherein: the leveling mechanism further comprises a rectangular sliding block (231) fixedly connected to the cross rod (23), the rectangular sliding block (231) is connected to the mounting rod (11) in a sliding mode, a rectangular block (53) is fixedly connected to a second telescopic rod (531), the top of the second telescopic rod (531) is fixedly connected to the mounting seat (12), a third spring (532) is sleeved on the second telescopic rod (531), and two ends of the third spring (532) are respectively abutted to the mounting seat (12) and the rectangular block (53).
7. The projection screen device for chinese language and literature teaching of claim 6, wherein: flattening mechanism still includes fixed connection take in action wheel (43) and fixed connection on axle (21) from driving wheel (44) on pivot (5), be equipped with belt (45) on action wheel (43), just action wheel (43) pass through belt (45) with from driving wheel (44) transmission connection, fixedly connected with rectangular cylinder (4) are gone up in installation pole (11), rectangular cylinder (4) internal symmetry sliding connection has two expansion piece (41), two expansion piece (41) all with belt (45) laminating, two fixedly connected with third telescopic link (42) between expansion piece (41), the cover has fourth spring (421) on third telescopic link (42), the both ends of fourth spring (421) respectively with two expansion piece (41) offset.
8. The projection screen device for chinese language and literature teaching of claim 7, wherein: the leveling mechanism is provided with a clamping mechanism used for fixing the projection cloth (22), the clamping mechanism comprises a cylindrical rod (54) rotatably connected to the mounting base (12), a spiral groove is formed in the lower section of the cylindrical rod (54), an insertion rod (533) is fixedly connected to the rectangular block (53), the insertion rod (533) is slidably connected to the spiral groove in the cylindrical rod (54), a clamping plate (541) is fixedly connected to the cylindrical rod (54), and the clamping plate (541) intermittently offsets the projection cloth (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111584888.4A CN114299768A (en) | 2021-12-22 | 2021-12-22 | Projection curtain device for Chinese language and literature teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111584888.4A CN114299768A (en) | 2021-12-22 | 2021-12-22 | Projection curtain device for Chinese language and literature teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114299768A true CN114299768A (en) | 2022-04-08 |
Family
ID=80968950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111584888.4A Withdrawn CN114299768A (en) | 2021-12-22 | 2021-12-22 | Projection curtain device for Chinese language and literature teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114299768A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116532450A (en) * | 2023-06-19 | 2023-08-04 | 献县科悦环保设备厂 | Pool cleaning and disinfecting equipment for secondary water supply |
-
2021
- 2021-12-22 CN CN202111584888.4A patent/CN114299768A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116532450A (en) * | 2023-06-19 | 2023-08-04 | 献县科悦环保设备厂 | Pool cleaning and disinfecting equipment for secondary water supply |
| CN116532450B (en) * | 2023-06-19 | 2023-12-08 | 四川发展环境科学技术研究院有限公司 | Pool cleaning and disinfecting equipment for secondary water supply |
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Application publication date: 20220408 |
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