CN111243346B

CN111243346B - Food nutrition catering teaching device

Info

Publication number: CN111243346B
Application number: CN202010116419.9A
Authority: CN
Inventors: 李则均
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2021-09-17
Anticipated expiration: 2040-02-25
Also published as: CN111243346A

Abstract

The invention discloses a food nutrition catering teaching device which comprises a projector main body, wherein a trigger device is arranged on the left side surface of an inner cavity of the projector main body, and a hanging rod is fixedly connected to the top surface of the projector main body; through trigger device, dust keeper, strain gauge, release's cooperation, make the dust keeper can turn over automatically at projector main part during operation, ensure that the dust keeper can not influence projection lens's normal work, make the dust keeper can be at projector main part during stop work self-closing simultaneously, ensure the dustproof function normal operating of dust keeper, cooperation through cleaning device and drive arrangement, make this food nutrition catering teaching device can clean its dust of attaching to projection lens surface after working automatically, the dust can be in time disposed, help improving projection quality, the deashing process is very simple, do not need artificial deashing, the work load of maintainer has been reduced, the practicality of this food nutrition catering teaching device has been improved.

Description

Food nutrition catering teaching device

Technical Field

The invention relates to the field of teaching devices, in particular to a food nutrition catering teaching device.

Background

A nutrition recipe is designed for one day, one week or one month according to the needs of human bodies and the content of various nutrient substances in food, so that the proportion of several nutrients such as protein, fat, carbohydrate, vitamin, mineral substance and the like ingested by human bodies is reasonable, namely balanced diet is achieved, and the nutrition recipe is a scientific and healthy diet mode which is guided by scientific nutrition theory and is suggested to be ingested in balance for staple food, protein, vegetable, fruit, grease and the like and is matched with rich and various food materials to achieve the effects of balancing nutrition and keeping health, a projector is required to be used for displaying course contents in the teaching process of food nutrition recipe, the projector is also called as a projector and is equipment capable of projecting images or videos onto cloth, in the using process of the projector, three prevention needs to be paid attention, namely dust prevention, shock prevention and moisture prevention, wherein the dust prevention comprises two parts of dust prevention in the projector and dust prevention of a lens.

Present food nutrition is generally direct through jib fixed mounting at the top in classroom and the camera lens on the projector directly expose in the air for the teaching of catering, the dustproof effect of camera lens is extremely poor, in long-time use, dust in the air can the adhesion on the camera lens, make the projection effect reduce, the teaching quality has been reduced, and need the maintainer to clear up the dust on the camera lens, during specific operation, the maintainer judges how much of the dust that gathers on the camera lens according to the projection quality, when the projection quality is relatively poor, the maintainer ascends a height and uses lens paper to clean the camera lens with the help of ascending a height equipment, the deashing process is very troublesome, the deashing frequency is higher simultaneously, maintainer's work load has been increased, consequently, need to design a food nutrition teaching device of catering urgently.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems that the projector for teaching the nutrition catering in the prior art is generally and fixedly arranged at the top of a classroom through a suspension rod, and the lens on the projector is directly exposed in the air, the dustproof effect of the lens is extremely poor, in the long-time use process, dust in the air can be adhered to the lens, so that the projection effect is reduced, the teaching quality is reduced, moreover, the maintenance personnel is required to clean the dust on the lens, and during the specific operation, the maintenance personnel judges the amount of the dust collected on the lens according to the projection quality, when the projection quality is poor, the maintainer ascends by means of the ascending equipment and cleans the lens by using the lens paper, the dust cleaning process is very troublesome, the invention aims to provide a food nutrition catering teaching device, which can well solve the problems in the background technology.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The food nutrition catering teaching device comprises a projector main body, wherein a trigger device is arranged on the left side of the inner cavity of the projector main body, a suspension rod is fixedly connected to the top surface of the projector main body, a projection lens is arranged on the right side of the inner cavity of the projector main body, and a dustproof device is arranged at the right end of the top surface of the projector main body;

the trigger device comprises a blast fan, a blast fan bolt is installed on the left side surface of an inner cavity of the projector main body, the left end of the blast fan is communicated with an external space, the right end of the blast fan is fixedly communicated with a mask expanding cover, the right end of the mask expanding cover is fixedly connected with the inner wall of the projector main body, the inner wall of the mask expanding cover is fixedly connected with a slide bar, a conical air deflector and a reset spring are movably sleeved outside the slide bar, the right end of the slide bar is fixedly connected with a baffle disc, one end of the reset spring is fixedly connected with the right side surface of the conical air deflector, the other end of the reset spring is fixedly connected with the left side surface of the baffle disc, the middle part of the right side surface of the conical air deflector is fixedly connected with a traction line, the external activity of the traction line is sleeved with a guide ring, and the guide ring is fixedly connected with the top surface of the inner cavity of the projector main body;

the dustproof device comprises a shell, the bottom surface of the shell is fixedly connected with the top surface of the projector main body, a rotating shaft is movably sleeved on the inner wall of the shell, a reset spring is sleeved on the outer portion of the rotating shaft, one end of the reset spring is fixedly connected with the surface of the rotating shaft, the other end of the reset spring is fixedly connected with the top surface of the inner cavity of the shell, a rotating disc is fixedly sleeved on the outer portion of the rotating shaft, a force application plate is fixedly connected with the outer portion of the rotating disc, a dust blocking device is arranged on the rotating disc, a driven wheel is fixedly sleeved on the outer portion of the rotating shaft, a transmission line is wound on the outer portion of the driven wheel, a strain device and a release device are arranged on the bottom surface of the inner cavity of the shell, a driving motor is installed on the bottom surface of the inner cavity of the shell through a bolt, a driving wheel is fixedly sleeved on an output shaft of the driving motor, one end of the transmission line is wound on the outer portion of the driving wheel, and a track groove is formed in the surface of the shell;

the strain device comprises a positioning block, the bottom surface of the positioning block is fixedly connected with the bottom surface of the inner cavity of the shell, the positioning block is positioned below the rotating disk, an arc track is arranged inside the positioning block, a cover plate matched with the arc track is mounted on the top surface of the positioning block through a bolt, an embedded groove is formed in the bottom surface of the inner cavity of the arc track, a conducting strip is fixedly embedded inside the embedded groove, a pressure spring is connected onto the cover plate, the other end of the pressure spring extends into the arc track and is fixedly connected with a piston, the other side of the piston is connected with an arc force bearing column, the other end of the arc force bearing column extends to the outside of the positioning block, the arc force bearing column is matched with the force application plate, a conducting ring is fixedly connected onto the left side surface of the inner cavity of the arc track, the conducting ring is movably sleeved on the outside of the arc force bearing column, and a first wiring strip and a second wiring strip are fixedly inserted on the right side surface of the positioning block, one end of the first wiring strip is connected with the conducting strip, and one end of the second wiring strip is connected with the conducting ring;

the piston comprises a piston main body, the piston main body is connected with the inner wall of the arc track in a sliding mode, the right side face of the piston main body is fixedly connected with one end of a pressure spring, the left side face of the piston main body is fixedly connected with one end of an arc-shaped force bearing column, a fixing groove is formed in the piston main body, a current conducting plate is embedded in the fixing groove, a positioning groove is formed in the bottom face of the piston main body, the bottom end of the current conducting plate is connected with a current conducting elastic sheet, the other end of the current conducting elastic sheet extends to the inside of the positioning groove, a contact column is fixedly connected to the left side face of the current conducting plate, and the other end of the contact column extends to the outside of the piston main body and is in contact connection with the right side face of the current conducting ring;

the releasing device comprises a supporting plate, the bottom end of the supporting plate is fixedly connected with the bottom surface of the inner cavity of the shell, the side surface of the supporting plate is fixedly connected with the inner wall of the shell, a boss is arranged at the top end of the supporting plate, a threading hole is formed in the supporting plate, the top end of the threading hole penetrates through the boss, a limiting elastic sheet is fixedly connected to the top surface of the boss, one end of a pulling line penetrates through the threading hole and is fixedly connected with the bottom surface of the limiting elastic sheet, a positioning box is movably sleeved outside the boss and is fixed with the boss through a bolt, the positioning box is movably sleeved outside the rotating shaft, a limiting ratchet gear is arranged inside the positioning box and is fixedly sleeved outside the rotating shaft, and the limiting ratchet gear can be meshed with the limiting elastic sheet in a one-way manner;

the dust blocking device comprises a dust blocking block, the top surface of the dust blocking block is fixedly connected with an L-shaped transmission rod, the other end of the L-shaped transmission rod penetrates through the track groove and is fixedly connected with the rotating disc, the L-shaped transmission rod is connected with the inner wall of the track groove in a sliding mode, the left side surface of the dust blocking block is provided with an installation groove, and a cleaning device and a driving device are arranged inside the installation groove;

the cleaning device comprises a propelling column, a guide hole is formed in the propelling column, a guide rod is inserted in the guide hole in a movable manner, the right end of the guide rod is fixedly connected with the right side surface of an inner cavity of the mounting groove, a tension spring is sleeved on the outer portion of the guide rod in a movable manner, one end of the tension spring is fixedly connected with the right side surface of the propelling column, the other end of the tension spring is fixedly connected with the inner wall of the mounting groove, a containing groove is formed in the right side surface of the propelling column, a rotary rod is arranged in the containing groove, the bottom end of the rotary rod is movably sleeved on the bottom surface of the inner cavity of the containing groove, the top end of the rotary rod is movably sleeved on the top surface of the inner cavity of the containing groove, a recovery spring is sleeved on the outer portion of the rotary rod in a movable manner, one end of the recovery spring is connected with the surface of the rotary rod, the other end of the recovery spring is fixedly connected with the left side surface of the inner cavity of the containing groove, a driving bevel gear and a take-up wheel are fixedly sleeved on the outer portion of the rotary rod from bottom to top in sequence, a traction rope is wound outside the take-up pulley, the other end of the traction rope is fixedly connected with the right side surface of the inner cavity of the mounting groove, the upper surface and the lower surface of the propelling column are both provided with through holes communicated with the holding groove, the left side surface of the propelling column is movably inserted with an L-shaped rotating arm, the right end of the L-shaped rotating arm extends to the inside of the holding groove and is fixedly sleeved with a driven bevel gear, the driven bevel gear is meshed with a driving bevel gear, the left end of the L-shaped rotating arm is fixedly connected with a flying disc, the left side surface of the propelling column is provided with a first arc-shaped groove, the right side surface of the flying disc is provided with a second arc-shaped groove, a steel ball is movably clamped between the first arc-shaped groove and the second arc-shaped groove, the surface of the flying disc is provided with a groove, the left side surface of the flying disc is fixedly connected with a sponge column, bag-shaped lens paper is movably sleeved outside the sponge column, the right end of the bag-shaped lens paper is movably sleeved outside the flying disc, a rubber ring is movably sleeved outside the bag-shaped lens paper, the rubber ring is matched with the groove;

the driving device comprises a fixed cylinder and a transmission shaft, the bottom surface of the fixed cylinder is fixedly connected with the bottom surface of the inner cavity of the mounting groove, the right side surface of the inner cavity of the fixed cylinder is connected with a piston column through an ejection spring in a transmission manner, the piston column is slidably connected with the inner wall of the fixed cylinder, the left side surface of the piston column is fixedly connected with a rack, the left end of the rack extends to the outside of the mounting groove, and the left end of the top surface of the fixed cylinder is fixedly connected with a guide wheel; the bottom activity of transmission shaft cup joints on the bottom surface of mounting groove inner chamber, the fixed cover in outside of transmission shaft has connect drive gear, drive gear and rack toothing, the fixed cover in top of transmission shaft has connect the reel, the outside winding of reel has the application of force line, the other end of application of force line passes the leading wheel, interlude hole and holding tank and with the top surface fixed connection of mounting groove inner chamber, one section that application of force line is located between propulsion post and the mounting groove inner chamber top surface is the slope form left, and one section that application of force line is located between propulsion post and the mounting groove inner chamber bottom surface is the slope form left.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

the projection lens is covered by the dust blocking device, so that dust in the air can not attach to the surface of the projection lens when the food nutrition catering teaching device does not work, a dustproof effect is achieved, the projection effect is improved, the teaching quality is improved, the dust blocking device can be automatically turned over when the projector main body works through the cooperation of the trigger device, the dust blocking device, the strain device and the release device, the normal work of the projection lens can not be influenced by the dust blocking device, meanwhile, the dust blocking device can be automatically closed when the projector main body stops working, the normal operation of the dust blocking function of the dust blocking device can be ensured, the dust attached to the surface of the projection lens after the food nutrition catering teaching device works can be automatically wiped through the cooperation of the cleaning device and the driving device, the dust can be timely cleaned, and the projection quality is improved, the ash removal process is very simple, manual ash removal is not needed, the workload of maintenance personnel is reduced, and the practicability of the food nutrition catering teaching device is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic diagram of the internal structure of the triggering device shown in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 3 at A according to the present invention;

FIG. 5 is a schematic view of the internal structure of the dust-proof device shown in FIG. 2 according to the present invention;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 5 in accordance with the present invention;

FIG. 7 is a schematic diagram of the structure of the strain gage of FIG. 5 according to the present invention;

FIG. 8 is a schematic view of the internal structure of FIG. 7 according to the present invention;

FIG. 9 is a schematic view of the internal structure of the piston of FIG. 8 according to the present invention;

FIG. 10 is a schematic view of the internal structure of the releasing device in FIG. 5 according to the present invention;

FIG. 11 is a schematic view of the internal structure of the dust guard of FIG. 5 according to the present invention;

FIG. 12 is a schematic view of the internal structure of the cleaning device shown in FIG. 11 according to the present invention;

FIG. 13 is a cross-sectional view taken at C-C of FIG. 12 in accordance with the present invention;

FIG. 14 is an enlarged schematic view of the structure of FIG. 12 of the present invention at D;

fig. 15 is a schematic view of the internal structure of the driving device of fig. 11 according to the present invention.

The reference numbers in the figures illustrate:

100. a projector main body; 200. a boom; 300. a projection lens; 1. a trigger device; 11. a blower fan; 12. a mask expanding cover; 13. a slide bar; 14. a tapered air deflector; 15. a return spring; 16. a catch tray; 17. a pulling wire; 18. a guide ring; 2. a dust-proof device; 201. a housing; 202. a rotating shaft; 203. resetting the clockwork spring; 204. rotating the disc; 205. a force application plate; 206. a driven wheel; 207. a drive line; 208. a drive motor; 209. a drive wheel; 210. a track groove; 3. a strain device; 301. positioning blocks; 302. a circular arc track; 303. a cover plate; 304. embedding a groove; 305. a conductive sheet; 306. a pressure applying spring; 307. a piston; 3071. a piston body; 3072. fixing grooves; 3073. a conductive plate; 3074. positioning a groove; 3075. a conductive spring plate; 3076. a contact post; 308. an arc-shaped bearing column; 309. conducting rings; 310. a first wiring strip; 311. a second wiring strip; 4. a release device; 41. a support plate; 42. a boss; 43. threading holes; 44. a limiting elastic sheet; 45. a positioning box; 46. a limiting ratchet gear; 5. a dust blocking device; 51. a dust blocking block; 52. an L-shaped transmission rod; 53. mounting grooves; 6. a cleaning device; 601. advancing the column; 602. a guide hole; 603. a guide bar; 604. a tension spring; 605. accommodating grooves; 606. rotating the rod; 607. a drive bevel gear; 608. a take-up pulley; 609. a pulling rope; 610. inserting holes; 611. an L-shaped rotating arm; 612. a driven bevel gear; 613. a flying disc; 614. a first arc-shaped slot; 615. a second arc-shaped slot; 616. steel balls; 617. a groove; 618. a sponge column; 619. bag-type lens paper; 620. a rubber ring; 621. restoring the clockwork spring; 7. a drive device; 71. a fixed cylinder; 72. ejecting a spring; 73. a piston post; 74. a rack; 75. a guide wheel; 76. a drive shaft; 77. a transmission gear; 78. a reel; 79. and (5) applying a force line.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; rather than all embodiments. Based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

Referring to fig. 1 to 15, the food nutrition catering teaching device includes a projector main body 100, a trigger device 1 is disposed on a left side surface of an inner cavity of the projector main body 100, a suspension rod 200 is fixedly connected to a top surface of the projector main body 100, a projection lens 300 is disposed on a right side surface of the inner cavity of the projector main body 100, and a dust-proof device 2 is disposed at a right end of the top surface of the projector main body 100.

The triggering device 1 comprises a blowing fan 11, the blowing fan 11 and the projector main body 100 use the same power supply line, the blowing fan 11 is installed on the left side surface of the inner cavity of the projector main body 100 through bolts, the left end of the blowing fan 11 is communicated with the external space, the right end of the blowing fan 11 is fixedly communicated with an expansion cover 12, the right end of the expansion cover 12 is fixedly connected with the inner wall of the projector main body 100, the inner wall of the expansion cover 12 is fixedly connected with a sliding rod 13, a conical air deflector 14 and a return spring 15 are movably sleeved outside the sliding rod 13, a baffle disc 16 is fixedly connected to the right end of the sliding rod 13, one end of the return spring 15 is fixedly connected with the right side surface of the conical air deflector 14, the other end of the return spring 15 is fixedly connected with the left side surface of the baffle disc 16, a pulling wire 17 is fixedly connected to the middle part of the right side surface of the conical air deflector 14, a guide ring 18 is movably sleeved outside the pulling wire 17, and the guide ring 18 is fixedly connected with the top surface of the inner cavity of the projector main body 100.

The dustproof device 2 comprises a shell 201, the bottom surface of the shell 201 is fixedly connected with the top surface of the projector main body 100, the inner wall of the shell 201 is movably sleeved with a rotating shaft 202, the outer part of the rotating shaft 202 is movably sleeved with a reset spring 203, one end of the reset spring 203 is fixedly connected with the surface of the rotating shaft 202, the other end of the reset spring 203 is fixedly connected with the top surface of the inner cavity of the shell 201, the outer part of the rotating shaft 202 is fixedly sleeved with a rotating disc 204, the outer part of the rotating disc 204 is fixedly connected with a force application plate 205, the rotating disc 204 is provided with a dust blocking device 5, the outer part of the rotating shaft 202 is fixedly sleeved with a driven wheel 206, the outer part of the driven wheel 206 is wound with a transmission line 207, the bottom surface of the inner cavity of the shell 201 is provided with a strain device 3 and a release device 4, the strain device 3 and the projector main body 100 use the same power supply line, the bottom surface of the inner cavity of the shell 201 is provided with a driving motor 208, the driving motor 208 and the projector main body 100 use the same power supply line, one terminal of the driving motor 208 is connected with one electrode of the power supply circuit, the other terminal of the driving motor 208 is electrically connected with the first wiring strip 310, the second wiring strip 311 is connected with the other electrode of the power supply circuit, the driving wheel 209 is fixedly sleeved on the output shaft of the driving motor 208, one end of the driving wire 207 is wound outside the driving wheel 209, and the surface of the shell 201 is provided with the track groove 210.

The strain device 3 comprises a positioning block 301, the bottom surface of the positioning block 301 is fixedly connected with the bottom surface of the inner cavity of the shell 201, the positioning block 301 is positioned below the rotating disc 204, an arc track 302 is arranged inside the positioning block 301, a cover plate 303 matched with the arc track 302 is installed on the top surface of the positioning block 301 through a bolt, an embedded groove 304 is arranged on the bottom surface of the inner cavity of the arc track 302, a conducting strip 305 is fixedly embedded inside the embedded groove 304, a pressure spring 306 is connected onto the cover plate 303, the other end of the pressure spring 306 extends into the inner part of the arc track 302 and is fixedly connected with a piston 307, the other surface of the piston 307 is connected with an arc bearing column 308, the other end of the arc bearing column 308 extends to the outside of the positioning block 301, the arc bearing column 308 is matched with the pressure plate 205, a conducting ring 309 is fixedly connected onto the left side surface of the inner cavity of the arc track 302, and the conducting ring 309 is movably sleeved outside the arc bearing column 308, a first wiring strip 310 and a second wiring strip 311 are fixedly inserted on the right side surface of the positioning block 301, one end of the first wiring strip 310 is connected with the conducting strip 305, one end of the second wiring strip 311 is connected with the conducting ring 309, and the positioning block 301, the cover plate 303 and the arc-shaped bearing column 308 are made of insulating materials.

The piston 307 comprises a piston main body 3071, the piston main body 3071 is slidably connected with the inner wall of the arc track 302, the right side surface of the piston main body 3071 is fixedly connected with one end of the pressure spring 306, the left side surface of the piston main body 3071 is fixedly connected with one end of the arc force bearing column 308, a fixing groove 3072 is formed in the piston main body 3071, a conducting plate 3073 is embedded in the fixing groove 3072, a positioning groove 3074 is formed in the bottom surface of the piston main body 3071, a conducting elastic sheet 3075 is connected to the bottom end of the conducting plate 3073, the other end of the conducting elastic sheet 3075 extends to the inside of the positioning groove 3074, a contact column 3076 is fixedly connected to the left side surface of the conducting plate 3073, the other end of the contact column 3076 extends to the outside of the piston main body 3071 and is in contact connection with the right side surface of the conducting ring 309, and the piston main body 3071 is made of an insulating material.

The releasing device 4 comprises a supporting plate 41, the bottom end of the supporting plate 41 is fixedly connected with the bottom surface of the inner cavity of the shell 201, the side surface of the supporting plate 41 is fixedly connected with the inner wall of the shell 201, a boss 42 is arranged at the top end of the supporting plate 41, a threading hole 43 is formed in the supporting plate 41, the boss 42 is penetrated through by the top end of the threading hole 43, a limiting elastic sheet 44 is fixedly connected with the top surface of the boss 42, one end of a pulling line 17 penetrates through the threading hole 43 and is fixedly connected with the bottom surface of the limiting elastic sheet 44, a positioning box 45 is movably sleeved outside the boss 42, the positioning box 45 is fixed together with the boss 42 through a bolt, the positioning box 45 is movably sleeved outside the rotating shaft 202, a limiting ratchet gear 46 is arranged inside the positioning box 45, the limiting ratchet gear 46 is fixedly sleeved outside the rotating shaft 202, and the limiting ratchet gear 46 can be in one-way meshed with the limiting elastic sheet 44.

The dust blocking device 5 comprises a dust blocking block 51, an L-shaped transmission rod 52 is fixedly connected to the top surface of the dust blocking block 51, the other end of the L-shaped transmission rod 52 penetrates through the rail groove 210 and is fixedly connected with the rotating disc 204, the L-shaped transmission rod 52 is connected with the inner wall of the rail groove 210 in a sliding mode, an installation groove 53 is formed in the left side face of the dust blocking block 51, and a cleaning device 6 and a driving device 7 are arranged inside the installation groove 53.

The cleaning device 6 comprises a pushing column 601, a guide hole 602 is formed inside the pushing column 601, a guide rod 603 is movably inserted into the guide hole 602, the right end of the guide rod 603 is fixedly connected with the right side surface of the inner cavity of the mounting groove 53, a tension spring 604 is movably sleeved outside the guide rod 603, one end of the tension spring 604 is fixedly connected with the right side surface of the pushing column 601, the other end of the tension spring 604 is fixedly connected with the inner wall of the mounting groove 53, a receiving groove 605 is formed on the right side surface of the pushing column 601, a rotating rod 606 is arranged inside the receiving groove 605, the bottom end of the rotating rod 606 is movably sleeved on the bottom surface of the inner cavity of the receiving groove 605, the top end of the rotating rod 606 is movably sleeved on the top surface of the inner cavity of the receiving groove 605, a restoring spring 621 is movably sleeved outside the rotating rod 606, one end of the restoring spring 621 is connected with the surface of the rotating rod 606, the other end of the restoring spring 621 is fixedly connected with the left side surface of the inner cavity of the receiving groove 605, a driving bevel gear 607 and a take-up pulley 608 are fixedly sleeved on the outside of the rotating rod 606 from bottom to top in sequence, a pulling rope 609 is wound on the outside of the take-up pulley 608, the other end of the pulling rope 609 is fixedly connected with the right side surface of the inner cavity of the mounting groove 53, the upper surface and the lower surface of the pushing column 601 are both provided with through holes 610 communicated with the accommodating groove 605, the left side surface of the pushing column 601 is movably inserted with an L-shaped rotating arm 611, the right end of the L-shaped rotating arm 611 extends to the inside of the accommodating groove 605 and is fixedly sleeved with a driven bevel gear 612, the driven bevel gear 612 is engaged with the driving bevel gear 607, the left end of the L-shaped rotating arm 611 is fixedly connected with a flying disc 613, the left side surface of the pushing column 601 is provided with a first arc-shaped groove 614, the right side surface of the flying disc 613 is provided with a second arc-shaped groove 615, a steel ball 616 is movably clamped between the first arc-shaped groove 614 and the second arc-shaped groove 615, the surface of the flying disc 613 is provided with a sponge column 618, the external activity of sponge post 618 has cup jointed pocket type lens paper 619, and the right-hand member activity of pocket type lens paper 619 has cup jointed the outside at frisbee 613, and the external activity of pocket type lens paper 619 has cup jointed rubber circle 620, and rubber circle 620 and recess 617 looks adaptation, rubber circle 620 are used for fixing pocket type lens paper 619.

The driving device 7 comprises a fixed cylinder 71 and a transmission shaft 76, the bottom surface of the fixed cylinder 71 is fixedly connected with the bottom surface of the inner cavity of the mounting groove 53, the right side surface of the inner cavity of the fixed cylinder 71 is in transmission connection with a piston column 73 through an ejection spring 72, the piston column 73 is in sliding connection with the inner wall of the fixed cylinder 71, the left side surface of the piston column 73 is fixedly connected with a rack 74, the left end of the rack 74 extends to the outside of the mounting groove 53, and the left end of the top surface of the fixed cylinder 71 is fixedly connected with a guide wheel 75; the bottom end of the transmission shaft 76 is movably sleeved on the bottom surface of the inner cavity of the mounting groove 53, a transmission gear 77 is fixedly sleeved outside the transmission shaft 76, the transmission gear 77 is meshed with the rack 74, a reel 78 is fixedly sleeved at the top end of the transmission shaft 76, a force application wire 79 is wound outside the reel 78, the other end of the force application wire 79 penetrates through the guide wheel 75, the insertion hole 610 and the accommodating groove 605 and is fixedly connected with the top surface of the inner cavity of the mounting groove 53, a section, located between the pushing column 601 and the top surface of the inner cavity of the mounting groove 53, of the force application wire 79 is inclined leftwards, and a section, located between the pushing column 601 and the bottom surface of the inner cavity of the mounting groove 53, of the force application wire 79 is inclined leftwards.

The working principle is as follows:

firstly, the projector main body 100 is opened through a remote controller, so that the power supply of the projector main body 100 is connected, meanwhile, the power supplies of the driving motor 208 and the blowing fan 11 are connected, then the blowing fan 11 runs and applies power to air, so that the air flows, then the flowing air impacts on the left side surface of the conical air deflector 14, then the conical air deflector 14 moves rightwards under the action of the impact force of the air flow and applies work to the reset spring 15, so that the elastic potential energy of the reset spring 15 is increased, then the conical air deflector 14 is separated from the inner wall of the mask expanding cover 12, then the air flow passes through the gap between the conical air deflector 14 and the mask expanding cover 12 and enters the projector main body 100, the flowing speed of the air in the projector main body 100 is promoted, the heat dissipation effect is increased, then the pulling wire 17 gradually becomes loose, then the end part of the limiting elastic sheet 44 is lifted upwards under the action of the self elastic force, the end of the limit elastic sheet 44 is engaged with the limit ratchet gear 46 in a unidirectional way, at the same time, the driving motor 208 drives the driving wheel 209 to rotate, then the transmission line 207 winds to the outside of the driving wheel 209, the transmission line 207 is released from the outside of the driven wheel 206, the driven wheel 206 rotates anticlockwise, then the driven wheel 206 drives the rotating disc 204 to rotate anticlockwise through the rotating shaft 202, the rotating shaft 202 does work on the reset spring 203, the elastic potential energy of the reset spring 203 is increased, then the rotating disc 204 drives the force applying plate 205 and the dust blocking device 5 to rotate anticlockwise, then the force applying plate 205 is contacted with the end of the arc force bearing column 308 and applies a thrust to the arc force bearing column 308, then the arc force bearing column 308 pushes the piston 307 to move towards the inside of the arc track 302, then the contact column 3076 is separated from the conducting ring 309, the power supply of the driving motor 208 is disconnected, then the driving motor 208 stops running, then, the rotating shaft 202 is fixed, and the dust blocking device 5 is fixed, at this time, the dust blocking device 5 is located above the housing 201, the projection lens 300 is not hindered from working normally, and the opening of the mounting groove 53 faces to the right and downward, so as to reduce the probability of dust adhering to the surface of the bag-shaped lens paper 619, in the process, the left side surface of the dust blocking block 51 is gradually separated from the right side surface of the projector main body 100, then the piston column 73 drives the rack 74 to move to the left under the action of the elasticity of the ejecting spring 72, the rack 74 drives the transmission shaft 76 to rotate through the meshing action of the rack 74 and the transmission gear 77, the transmission shaft 76 drives the reel 78 to rotate, so that the force application line 79 is released from the outside of the reel 78, then the force application line 79 is gradually loosened, then the pushing column 601 moves to the right under the action of the tension spring 604, so that the left end of the cleaning device 6 gradually moves out of the inside of the projection lens 300 and moves to the inside of the mounting groove 53, the cleaning device 6 is protected, the probability of dust adhering to the surface of the bag-shaped lens paper 619 is further reduced, meanwhile, the rotating rod 606 drives the bevel gear 607 and the take-up pulley 608 to rotate under the action of restoring the torsion force of the spring 621, the driving bevel gear 607 drives the flying disc 613, the sponge column 618 and the bag-shaped lens paper 619 to rotate through the meshing action of the driving bevel gear 607 and the driven bevel gear 612 and the L-shaped rotating arm 611, the bag-shaped lens paper 619 wipes the surface of the projection lens 300 to perform dust removal work, the take-up pulley 608 rotates to enable the pulling rope 609 to wind outwards until the left side surface of the piston column 73 is in contact with the left side surface of the inner cavity of the fixed cylinder 71, food nutrition catering teaching is started, after the course teaching is finished, the projector main body 100 is closed through the remote controller, the projector main body 100 stops working, meanwhile, the power supply of the air blowing fan 11 is cut off, and the air blowing fan 11 stops working, the impact force on the tapered wind deflector 14 disappears, then the tapered wind deflector 14 moves to the left under the elastic force of the return spring 15 and pulls the pulling wire 17, the pulling wire 17 pulls the end of the limit elastic sheet 44, the limit elastic sheet 44 bends and deforms, and the end of the limit elastic sheet 44 moves downwards, so that the end of the limit elastic sheet 44 is separated from the limit ratchet gear 46, the limitation on the rotating shaft 202 is released, then the rotating shaft 202 drives the rotating disc 204 to rotate clockwise under the torsional force of the return spring 203, the rotating disc 204 drives the force plate 205 and the dust blocking device 5 to rotate clockwise, then the piston 307 slides to the left under the elastic force of the force spring 306 until the end of the contact post 3076 is in contact connection with the right side surface of the conducting ring 309, so that the first wire connecting bar 310 is electrically connected with the second wire connecting bar 311, then the end of the rack 74 is in contact with the right side surface of the projector main body 100 and slides on, the right side of the projector body 100 applies a pushing force to the rack 74, the rack 74 drives the piston post 73 to move rightwards under the pushing force, the piston post 73 works the ejecting spring 72, the elastic potential energy of the ejecting spring 72 is increased, at the same time, the rack 74 drives the reel 78 to rotate reversely by the meshing action of the rack 74 and the transmission gear 77, the transmission shaft 76 drives the reel 78, the force application wire 79 is wound towards the outside of the reel 78, then the force application wire 79 is gradually stretched and applies a pushing force towards the left to the ejecting post 601, then the cleaning device 6 is gradually moved out from the inside of the mounting groove 53, then the pulling rope 609 is released from the outside of the take-up pulley 608, the take-up pulley 608 rotates, the take-up pulley 608 works the restoring spring 621 through the rotating rod 606, the elastic potential energy of the restoring spring 621 is increased, and further the bag type lens paper 619 rotates, then the rotating bag type lens paper 619 is gradually contacted with the surface of the projection lens 300 and wipes the surface of the projection lens 300, so as to detach the dust on the surface of the projection lens 300, then the bag-shaped lens paper 619 and the sponge post 618 change according to the shape of the surface of the projection lens 300, which is helpful to fully wipe the surface of the projection lens 300, the wiping effect is better, until the left side surface of the dust block 51 completely contacts with the right side surface of the projector main body 100, at this moment, the projection lens 300 is completely covered by the dust blocking device 5, and the dustproof effect is achieved.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims

1. Food nutrition catering teaching device, including projecting apparatus main part (100), its characterized in that: the left side surface of the inner cavity of the projector main body (100) is provided with a trigger device (1), the top surface of the projector main body (100) is fixedly connected with a suspender (200), the right side surface of the inner cavity of the projector main body (100) is provided with a projection lens (300), and the right end of the top surface of the projector main body (100) is provided with a dustproof device (2);

the trigger device (1) comprises a blowing fan (11), the blowing fan (11) is installed on the left side surface of an inner cavity of the projector main body (100) through bolts, the left end of the blowing fan (11) is communicated with an external space, the right end of the blowing fan (11) is fixedly communicated with an expansion cover (12), the right end of the expansion cover (12) is fixedly connected with the inner wall of the projector main body (100), the inner wall of the expansion cover (12) is fixedly connected with a sliding rod (13), a conical air deflector (14) and a return spring (15) are movably sleeved outside the sliding rod (13), the right end of the sliding rod (13) is fixedly connected with a baffle disc (16), one end of the return spring (15) is fixedly connected with the right side surface of the conical air deflector (14), the other end of the return spring (15) is fixedly connected with the left side surface of the baffle disc (16), and a pulling wire (17) is fixedly connected with the middle part of the right side surface of the conical air deflector (14), a guide ring (18) is movably sleeved outside the traction line (17), and the guide ring (18) is fixedly connected with the top surface of the inner cavity of the projector main body (100);

the dustproof device (2) comprises a shell (201), the bottom surface of the shell (201) is fixedly connected with the top surface of a projector main body (100), a rotating shaft (202) is movably sleeved on the inner wall of the shell (201), a reset spring (203) is movably sleeved on the outer portion of the rotating shaft (202), one end of the reset spring (203) is fixedly connected with the surface of the rotating shaft (202), the other end of the reset spring (203) is fixedly connected with the top surface of the inner cavity of the shell (201), a rotating disc (204) is fixedly sleeved on the outer portion of the rotating shaft (202), a force applying plate (205) is fixedly connected on the outer portion of the rotating disc (204), a dust blocking device (5) is arranged on the rotating disc (204), a driven wheel (206) is sleeved on the outer portion of the rotating shaft (202), a transmission line (207) is wound on the outer portion of the driven wheel (206), a strain device (3) and a release device (4) are arranged on the bottom surface of the inner cavity of the shell (201), a driving motor (208) is installed on the bottom surface of the inner cavity of the shell (201) through a bolt, a driving wheel (209) is fixedly sleeved on an output shaft of the driving motor (208), one end of a transmission line (207) is wound outside the driving wheel (209), and a track groove (210) is formed in the surface of the shell (201);

the strain device (3) comprises a positioning block (301), the bottom surface of the positioning block (301) is fixedly connected with the bottom surface of an inner cavity of a shell (201), the positioning block (301) is positioned below a rotating disk (204), an arc track (302) is arranged inside the positioning block (301), a cover plate (303) matched with the arc track (302) is installed on the top surface of the positioning block (301) through bolts, an embedded groove (304) is formed in the bottom surface of the inner cavity of the arc track (302), a conducting plate (305) is fixedly embedded inside the embedded groove (304), a pressure applying spring (306) is connected onto the cover plate (303), the other end of the pressure applying spring (306) extends into the arc track (302) and is fixedly connected with a piston (307), an arc bearing column (308) is connected to the other surface of the piston (307), the other end of the arc bearing column (308) extends to the outside of the positioning block (301), and the arc bearing column (308) is matched with the force applying plate (205), the left side surface of the inner cavity of the arc track (302) is fixedly connected with a conducting ring (309), the conducting ring (309) is movably sleeved outside the arc-shaped bearing column (308), the right side surface of the positioning block (301) is fixedly inserted with a first wiring strip (310) and a second wiring strip (311), one end of the first wiring strip (310) is connected with the conducting strip (305), and one end of the second wiring strip (311) is connected with the conducting ring (309);

the piston (307) comprises a piston main body (3071), the piston main body (3071) is connected with the inner wall of the arc track (302) in a sliding mode, the right side face of the piston main body (3071) is fixedly connected with one end of the pressure applying spring (306), the left side face of the piston main body (3071) is fixedly connected with one end of the arc-shaped force bearing column (308), a fixing groove (3072) is formed in the piston main body (3071), a conducting plate (3073) is embedded in the fixing groove (3072), a positioning groove (3074) is formed in the bottom face of the piston main body (3071), a conducting elastic sheet (3075) is connected to the bottom end of the conducting plate (3073), the other end of the conducting elastic sheet (3075) extends to the inside of the positioning groove (3074), a contact column (3076) is fixedly connected to the left side face of the conducting plate (3073), and the other end of the contact column (3076) extends to the outside of the piston main body (3071) and is connected with the right side face of the conducting ring (309) in a contact mode;

the releasing device (4) comprises a supporting plate (41), the bottom end of the supporting plate (41) is fixedly connected with the bottom surface of an inner cavity of the shell (201), the side surface of the supporting plate (41) is fixedly connected with the inner wall of the shell (201), a boss (42) is arranged at the top end of the supporting plate (41), a threading hole (43) is formed in the supporting plate (41), the top end of the threading hole (43) penetrates through the boss (42), a limiting elastic sheet (44) is fixedly connected with the top surface of the boss (42), one end of a pulling line (17) penetrates through the threading hole (43) and is fixedly connected with the bottom surface of the limiting elastic sheet (44), a positioning box (45) is movably sleeved on the outer portion of the boss (42), the positioning box (45) is fixed with the boss (42) through bolts, the positioning box (45) is movably sleeved on the outer portion of the rotating shaft (202), a limiting ratchet wheel, the limiting ratchet gear (46) is fixedly sleeved outside the rotating shaft (202), and the limiting ratchet gear (46) can be meshed with the limiting elastic sheet (44) in a one-way mode;

the dust blocking device (5) comprises a dust blocking block (51), the top surface of the dust blocking block (51) is fixedly connected with an L-shaped transmission rod (52), the other end of the L-shaped transmission rod (52) penetrates through the rail groove (210) and is fixedly connected with the rotating disc (204), the L-shaped transmission rod (52) is in sliding connection with the inner wall of the rail groove (210), the left side surface of the dust blocking block (51) is provided with a mounting groove (53), and a cleaning device (6) and a driving device (7) are arranged inside the mounting groove (53);

the cleaning device (6) comprises a pushing column (601), a guide hole (602) is formed in the pushing column (601), a guide rod (603) is movably inserted in the guide hole (602), the right end of the guide rod (603) is fixedly connected with the right side surface of the inner cavity of the mounting groove (53), a tension spring (604) is movably sleeved on the outer side of the guide rod (603), one end of the tension spring (604) is fixedly connected with the right side surface of the pushing column (601), the other end of the tension spring (604) is fixedly connected with the inner wall of the mounting groove (53), a containing groove (605) is formed in the right side surface of the pushing column (601), a rotating rod (606) is arranged in the containing groove (605), the bottom end of the rotating rod (606) is movably sleeved on the bottom surface of the inner cavity of the containing groove (605), the top end of the rotating rod (606) is movably sleeved on the top surface of the inner cavity of the containing groove (605), and a restoring spring (621) is movably sleeved on the outer side of the rotating rod (606), one end of a recovery spring (621) is connected with the surface of a rotating rod (606), the other end of the recovery spring (621) is fixedly connected with the left side surface of the inner cavity of the accommodating groove (605), a driving bevel gear (607) and a take-up pulley (608) are fixedly sleeved on the outer portion of the rotating rod (606) from bottom to top in sequence, a pulling rope (609) is wound on the outer portion of the take-up pulley (608), the other end of the pulling rope (609) is fixedly connected with the right side surface of the inner cavity of the mounting groove (53), the upper surface and the lower surface of the propelling column (601) are both provided with through holes (610) communicated with the accommodating groove (605), an L-shaped rotating arm (611) is movably inserted on the left side surface of the propelling column (601), the right end of the L-shaped rotating arm (611) extends to the inner portion of the accommodating groove (605) and is fixedly connected with a driven bevel gear (612), the driven bevel gear (612) is meshed with the driving bevel gear (607), the left end of the L-shaped rotating arm (611) is fixedly connected with a flying disc (613), a first arc-shaped groove (614) is formed in the left side face of the pushing column (601), a second arc-shaped groove (615) is formed in the right side face of the flying disc (613), steel balls (616) are movably clamped between the first arc-shaped groove (614) and the second arc-shaped groove (615), a groove (617) is formed in the surface of the flying disc (613), a sponge column (618) is fixedly connected to the left side face of the flying disc (613), bag-shaped lens paper (619) is movably sleeved outside the sponge column (618), the right end of the bag-shaped lens paper (619) is movably sleeved outside the flying disc (613), a rubber ring (620) is movably sleeved outside the bag-shaped lens paper (619), and the rubber ring (620) is matched with the groove (617);

the driving device (7) comprises a fixed cylinder (71) and a transmission shaft (76), the bottom surface of the fixed cylinder (71) is fixedly connected with the bottom surface of the inner cavity of the mounting groove (53), the right side surface of the inner cavity of the fixed cylinder (71) is in transmission connection with a piston column (73) through an ejection spring (72), the piston column (73) is in sliding connection with the inner wall of the fixed cylinder (71), the left side surface of the piston column (73) is fixedly connected with a rack (74), the left end of the rack (74) extends to the outside of the mounting groove (53), and the left end of the top surface of the fixed cylinder (71) is fixedly connected with a guide wheel (75); the bottom activity of transmission shaft (76) is cup jointed on the bottom surface of mounting groove (53) inner chamber, the fixed cover in outside of transmission shaft (76) has connect drive gear (77), drive gear (77) and rack (74) meshing, the fixed cover in top of transmission shaft (76) has connect reel (78), the outside of reel (78) is twined there is application of force line (79), guide wheel (75) are passed to the other end of application of force line (79), wear jack (610) and holding tank (605) and with the top surface fixed connection of mounting groove (53) inner chamber, application of force line (79) are located one section between propulsion post (601) and mounting groove (53) inner chamber top surface and are the slope form left, and application of force line (79) are located one section between propulsion post (601) and mounting groove (53) inner chamber bottom surface and are the slope form left.