Teaching aid for droplet propagation demonstration

Abstract

The invention belongs to the technical field of teaching aids, particularly relates to a teaching aid for droplet propagation demonstration, and aims to solve the problems that an existing science popularization teaching aid is in static display, cannot completely obtain attraction of children and has great challenges on understanding of the children, especially understanding of young children. In order to solve the problem that the popular science content and the display effect are not friendly to the children group, the invention provides the following scheme: a table body is included; the transparent cover is fixedly installed at the top of the table body, a bin door is hinged to one side of the transparent cover, a handle is fixedly connected to one side of the bin door, and a feeding port is formed in the top of the transparent cover; according to the spittle propagation teaching aid, in the using process, visual deduction of spittle propagation can be achieved, the complex spittle propagation concept is visualized, children are helped to learn important public health knowledge in the entertainment process, and the spittle propagation teaching aid is of great social significance especially in the high-incidence period of infectious diseases.

Description

Technical Field

[0001] The invention relates to the technical field of teaching aids, in particular to a teaching aid for droplet propagation demonstration. Background Art

[0002] Droplet transmission, that is, airborne droplet transmission, is a form of airborne transmission. Pathogens are secretions and droplets discharged by the source of infection through coughing, sneezing, and talking, and susceptible people inhale them and become infected. Common and high-incidence diseases among children, such as meningitis, whooping cough, influenza, and measles, are all transmitted in this way. Using popular science to let children understand the principles and protection of respiratory droplet transmission is an effective way to reduce the above common diseases. It is also a very meaningful part of public science education. Teaching aids are tools used by teachers when teaching, so that students can intuitively and vividly understand the various types of instruments used in teaching content and the general term for tools used by teachers when teaching. Teaching aids can increase students' interest in learning, enrich perceptual knowledge, help form clear concepts, and develop students' observation and thinking abilities. Generally, they are divided into three categories: ordinary teaching aids, special teaching aids, and preschool teaching aids.

[0003] However, the existing popular science teaching aids are static displays that cannot fully attract children. At the same time, they pose a great challenge to children's comprehension, especially that of young children. The popular science content and display effects are not friendly to children. For this reason, we have proposed a teaching aid for droplet transmission demonstration to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing popular science teaching aids in the prior art, that is, on the one hand, they are static displays and cannot fully attract children, and on the other hand, they pose a great challenge to children's comprehension, especially to young children, and the popular science content and display effects are not friendly to children. A teaching aid for droplet transmission demonstration is proposed.

[0005] The teaching aid for droplet transmission demonstration provided in this application adopts the following technical solution:

[0006] A teaching aid for droplet transmission demonstration, comprising:

[0007] Table body;

[0008] A transparent cover is fixedly mounted on the top of the table body, a door is hinged on one side of the transparent cover, a handle is fixedly connected to one side of the door, and a feed port is opened on the top of the transparent cover;

[0009] A mounting groove, which is opened on the top of the table body, a reciprocating mechanism is arranged in the mounting groove, a vertical plate is fixedly installed on the top of the table body, a piston cylinder is installed on the vertical plate, a breathing simulation mechanism is arranged in the piston cylinder, and the breathing simulation mechanism is used to simulate human breathing;

[0010] A human body model is installed on the top of the table. The human body model is connected to a mouth model and a nose model. A mounting cavity is opened in the human body model. Two lung models are installed in the mounting cavity. The two lung models are connected to the same trachea. The trachea is connected to the mouth model and the nose model. A plurality of bronchi are fixedly connected to the trachea. The plurality of bronchi are respectively located in the two lung models.

[0011] The control panel is provided with a first button, a second button, a third button and a fourth button, the first button is connected to the high-pressure air pump and the player, and the second button, the third button and the fourth button are connected to the electric push rod, the fan and the motor respectively.

[0012] An electric push rod is fixedly installed on the top of the transparent cover, and the output shaft of the electric push rod is fixedly connected to a U-shaped frame, and a mask is connected to the U-shaped frame. The mask cooperates with the mouth model and the nose model. When the electric push rod is turned on, the electric push rod drives the U-shaped frame and the mask to move vertically, thereby shielding and protecting the mouth model and the nose model.

[0013] The top inner wall and the bottom inner wall of the bellows are fixedly mounted with support rods, one end of the two support rods is fixedly connected to the same fan, and a control panel is fixedly mounted on the outer side of the table body. When the fan is turned on, the wind pressure generated by the fan is blown into the transparent cover through the air outlet.

[0014] A bellows is fixedly installed on one side of the warehouse door, an air outlet is opened on the inner wall of one side of the bellows, and the air outlet is communicated with the transparent cover; an air inlet is opened on the other side of the bellows, and a mesh plate is fixedly installed in the air inlet.

[0015] A controller is fixedly installed in the installation cavity, LED light strips are installed on the outsides of the two lung models, and pressure sensors are fixedly installed in the two lung models. The two pressure sensors, the controller and the LED light strips are connected in sequence. When the pressure sensor detects "infection" inside the lung model, the controller controls the LED light strip to turn on.

[0016] The reciprocating mechanism includes a guide rod, a sliding hole is opened at the bottom of the piston cylinder, the guide rod is slidably installed in the sliding hole, one end of the guide rod is fixedly connected to the bottom of the piston, and the other end of the guide rod is slidably installed in the annular limit groove. A reset spring is sleeved on the outer side of the guide rod, and the two ends of the reset spring are respectively fixedly connected to the bottom inner wall of the piston cylinder and the bottom of the piston. When the eccentric wheel rotates, the eccentric wheel drives the guide rod to move vertically. When the eccentric wheel rotates to a certain position, the reset spring drives the piston to reset through deformation force.

[0017] A high-pressure air pump is fixedly installed on the bottom inner wall of the installation cavity, and the output port of the high-pressure air pump is fixedly connected to a first connecting pipe, and the first connecting pipe is fixedly connected to two lung models. A player is fixedly installed on the mouth model, and the player records a sneeze sound for simulating a human sneeze.

[0018] The breathing simulation mechanism includes a piston, which is slidably installed in a piston cylinder. A rubber pad is fixedly connected to the top of the piston. The piston cylinder is fixedly connected to the first connecting tube with a second connecting tube. The second connecting tube is connected to an electric control valve, and the second connecting tube can be opened and closed by the electric control valve.

[0019] A through hole is provided on the inner wall of one side of the installation groove, and a rotating shaft is rotatably installed in the through hole. A motor is fixedly installed on one side of the table body, and the output shaft of the motor is fixedly connected to one end of the rotating shaft. An eccentric wheel is fixedly connected to the other end of the rotating shaft. An annular limiting groove is provided on the outer side of the eccentric wheel. When the motor is turned on, the rotating shaft can drive the eccentric wheel to rotate.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. This solution places colored foam balls (used to simulate droplets) in the mouth model. The colored foam balls (droplets) pass through the trachea and multiple bronchi and fall into the two lung models. Then the colored foam balls (droplets) trigger two pressure sensors. The two pressure sensors send instructions to the controller, and the controller controls the two LED light strips to turn on and flash, thereby intuitively simulating the virus infection process.

[0022] 2. This solution turns on the first button, which controls the high-pressure air pump and the player to start. The player can make the sound of sneezing and breathing. The air pressure generated by the high-pressure air pump is transmitted to the mouth model through the first connecting tube, the two lung models and the trachea, and then the colored foam balls in the mouth model are sprayed out, simulating the spraying of droplets from the human body model and the propagation process;

[0023] 3. This solution turns on the third button, which controls the fan to start. The wind pressure generated by the fan is transmitted to the transparent cover through the air outlet, causing the air in the transparent cover to flow, thereby simulating the splashing and propagation process of colored foam balls (droplets) under air flow.

[0024] The present invention can realize the visual interpretation of droplet transmission during use, visualize the complex concept of droplet transmission, and help children learn important public health knowledge in the process of entertainment, which is of great social significance especially during the high incidence period of infectious diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main structure of a teaching aid for droplet transmission demonstration proposed by the present invention;

[0026] Figure 2 A schematic diagram of the structure of a human body model of a teaching aid for droplet transmission demonstration proposed by the present invention;

[0027] Figure 3 A schematic diagram of the structure of a mask used as a teaching aid for droplet transmission demonstration proposed by the present invention;

[0028] Figure 4 A schematic diagram of the structure of a bellows for a droplet transmission demonstration teaching aid proposed by the present invention;

[0029] Figure 5 This is a schematic structural diagram of a breathing simulation mechanism of a teaching aid for droplet transmission demonstration proposed by the present invention;

[0030] Figure 6 This is a structural schematic diagram of a control panel of a teaching aid for droplet transmission demonstration proposed by the present invention;

[0031] Figure 7 A teaching aid for droplet transmission demonstration proposed by the present invention Figure 1 Schematic diagram of the structure with part A enlarged.

[0032] Figure numerals: 1, table; 2, transparent cover; 3, human body model; 4, warehouse door; 5, handle; 6, bellows; 7, feed port; 8, control panel; 9, nose model; 10, mouth model; 11, player; 12, installation cavity; 13, trachea; 14, bronchus; 15, lung model; 16, LED light strip; 17, first connecting pipe; 18, pressure sensor; 19, controller; 20, high-pressure air pump; 21, second connecting pipe; 22, electric Control valve; 23. Piston cylinder; 24. Piston; 25. Rubber pad; 26. Guide rod; 27. Return spring; 28. Eccentric wheel; 29. ​​Annular limit groove; 30. Motor; 31. Rotating shaft; 32. Mounting groove; 33. Air outlet; 34. Mesh plate; 35. Support rod; 36. Fan; 37. Electric push rod; 38. U-shaped frame; 39. Mask; 40. First button; 41. Second button; 42. Third button; 43. Fourth button; 44. Vertical plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1

[0035] Reference Figure 1-Figure 7 , a teaching aid for droplet transmission demonstration, comprising:

[0036] Table 1;

[0037] A transparent cover 2 is fixedly mounted on the top of the table body 1, a door 4 is hinged on one side of the transparent cover 2, a handle 5 is fixedly connected to one side of the door 4, and a feed port 7 is opened on the top of the transparent cover 2;

[0038] The mounting groove 32 is opened on the top of the table body 1, and a reciprocating mechanism is arranged in the mounting groove 32. A vertical plate 44 is fixedly installed on the top of the table body 1, and a piston cylinder 23 is installed on the vertical plate 44. A breathing simulation mechanism is arranged in the piston cylinder 23, and the breathing simulation mechanism is used to simulate human breathing;

[0039] A human body model 3 is installed on the top of the table body 1. The human body model 3 is connected to a mouth model 10 and a nose model 9. A mounting cavity 12 is provided in the human body model 3. Two lung models 15 are installed in the mounting cavity 12. The two lung models 15 are connected to the same trachea 13. The trachea 13 is connected to the mouth model 10 and the nose model 9. A plurality of bronchi 14 are fixedly connected to the trachea 13. The plurality of bronchi 14 are respectively located in the two lung models 15. A first button 40, a second button 41, a third button 42 and a fourth button 43 are installed on the control panel 8. The first button 40 is connected to the high-pressure air pump 20 and the player 11. The second button 41, the third button 42 and the fourth button 43 are respectively connected to the electric push rod 37, the fan 36 and the motor 30. An electric push rod 37 is fixedly installed on the top of the transparent cover 2. The output shaft of the electric push rod 37 is fixedly connected to a U-shaped frame 38. A mask 39 is connected to the U-shaped frame 38. The mask 39 Cooperating with the mouth model 10 and the nose model 9, when the electric push rod 37 is turned on, the electric push rod 37 drives the U-shaped frame 38 and the mask 39 to move vertically, so as to shield and protect the mouth model 10 and the nose model 9. A controller 19 is fixedly installed in the installation cavity 12. LED light strips 16 are installed on the outsides of the two lung models 15. Pressure sensors 18 are fixedly installed in the two lung models 15. The two pressure sensors 18, the controller 19 and the LED light strips 16 are connected in sequence. When the pressure sensor 18 detects "infection" inside the lung model 15, the controller 19 controls the LED light strips 16 to turn on. A high-pressure air pump 20 is fixedly installed on the bottom inner wall of the installation cavity 12. The output port of the high-pressure air pump 20 is fixedly connected to a first connecting pipe 17. The first connecting pipe 17 is fixedly connected to the two lung models 15. A player 11 is fixedly installed on the mouth model 10. The player 11 records sneezing sounds for simulating human sneezing.

[0040] Reference Figure 4 , Figure 5 and Figure 7A bellows 6 is fixedly installed on one side of the warehouse door 4, and an air outlet 33 is provided on the inner wall of one side of the bellows 6, and the air outlet 33 is communicated with the transparent cover 2. An air inlet is provided on the other side of the bellows 6, and a mesh plate 34 is fixedly installed in the air inlet. Support rods 35 are fixedly installed on the top inner wall and the bottom inner wall of the bellows 6, and one end of the two support rods 35 is fixedly connected to the same fan 36. A control panel 8 is fixedly installed on the outer side of the table body 1. When the fan 36 is turned on, the wind pressure generated by the fan 36 is blown into the transparent cover 2 through the air outlet 33. The reciprocating mechanism includes a guide rod 26, a sliding hole is provided at the bottom of the piston cylinder 23, and the guide rod 26 is slidably installed in the sliding hole. One end of the guide rod 26 is fixedly connected to the bottom of the piston 24, and the other end of the guide rod 26 is slidably installed in the annular limit groove 29. A return spring 27 is sleeved on the outer side of the guide rod 26, and the two ends of the return spring 27 are respectively fixedly connected to the bottom inner wall of the piston cylinder 23 and the bottom of the piston 24. When the eccentric wheel 28 rotates, the eccentric wheel 28 drives the guide rod 26 to move vertically. When the eccentric wheel 28 rotates to a certain position, the reset spring 27 drives the piston 24 to reset through the deformation force. The breathing simulation mechanism includes a piston 24, which is slidably installed in the piston cylinder 23. The top of the piston 24 is fixedly connected with a rubber pad 25. The piston cylinder 23 is fixedly connected to the first connecting tube 17 with the same second connecting tube 21. The second connecting tube 21 is connected with an electric control valve 22, and the second connecting tube 21 can be opened and closed by the electric control valve 22. A through hole is provided on the inner wall of one side of the installation groove 32, and a rotating shaft 31 is rotatably installed in the through hole. A motor 30 is fixedly installed on one side of the table body 1, and the output shaft of the motor 30 is fixedly connected to one end of the rotating shaft 31. The other end of the rotating shaft 31 is fixedly connected with the eccentric wheel 28. An annular limiting groove 29 is provided on the outer side of the eccentric wheel 28. When the motor 30 is turned on, the rotating shaft 31 can drive the eccentric wheel 28 to rotate.

[0041] The human body model 3 is made by 3D printing technology, and the two lung models 15 are made of acrylic material, which is convenient for demonstrating the virus entering the lungs and the process of lung infection;

[0042] The control methods of the electric push rod 37, the motor 30, the high-pressure air pump 20 and the fan 36 all adopt the remote control system technology and the voice interaction technology;

[0043] Speech interaction technology is a human-computer interaction technology that allows users to interact with computers through voice. This technology usually includes three parts: speech recognition, speech synthesis and speech understanding. Speech recognition technology can convert user's speech into text, speech synthesis technology can convert text into speech, and speech understanding technology can enable the computer to understand the user's intention.

[0044] Remote control technology is a technology for remote control and monitoring of controlled objects. It is a comprehensive technology formed by using automatic control technology, communication technology and computer technology. Generally speaking, it refers to the technology for controlling a single or two extreme actions of a remote controlled object. It has a wide range of applications in people's production and life. The remote control system is generally composed of a command program mechanism (or computer), transmission equipment and monitoring equipment.

[0045] The implementation principle of this embodiment is as follows: when in use, the door 4 is opened by the handle 5, and a colored foam ball (for simulating droplets) is placed in the mouth model 10, and the colored foam ball (droplets) passes through the trachea 13 and multiple bronchi 14 and falls into the two lung models 15, and then the colored foam ball (droplets) triggers two pressure sensors 18, and the two pressure sensors 18 send instructions to the controller 19, and the controller 19 controls the two LED light strips 16 to turn on and flash, thereby simulating the virus infection process, and then by turning on the first button 40, the first button 40 controls the high-pressure air pump 20 and the player 11 to turn on, and the player 11 can emit the sound of sneezing and breathing, and the high-pressure air pump 20 The generated air pressure is transmitted to the mouth model 10 through the first connecting tube 17, the two lung models 15 and the trachea 13, thereby spraying the colored foam balls in the mouth model 10, simulating the spraying and propagation process of droplets from the human body model 3. At the same time, the third button 42 can be turned on to control the fan 36 to turn on. The wind pressure generated by the fan 36 is transmitted to the transparent cover 2 through the air outlet 33, so that the air in the transparent cover 2 flows, thereby simulating the splashing and propagation process of the colored foam balls (droplets) under the condition of air flow. Then, by turning on the second button 41, the second button 41 controls the electric push rod 37 to turn on, and the electric push rod 37 drives the U-shaped frame 38 to move vertically, and the U-shaped frame 38 Drive the mask 39 to move vertically. When the mask 39 moves to the mouth model 10 and the nose model 9 for covering, repeat the above operation, so that the splashing and propagation effects of the colored foam balls (droplets) when wearing the mask 39 and when not wearing the mask 39 can be compared, so that the difference between wearing the mask 39 and not wearing the mask 39 can be intuitively distinguished. Finally, the colored foam balls (droplets) can be slowly put into the transparent cover 2 through the feed port 7, and the fourth button 43 is turned on at the same time. The fourth button 43 controls the motor 30 to turn on, the motor 30 drives the rotating shaft 31 to rotate, the rotating shaft 31 drives the eccentric wheel 28 to rotate, the eccentric wheel 28 drives the guide rod 26 and the piston 24 to move vertically upward, and the piston 24 is stretched and reset Spring 27, when the eccentric wheel 28 rotates to a certain position, the reset spring 27 drives the piston 24 to reset through the deformation force, and then the piston 24 drives the rubber pad 25 to reciprocate vertically. In this process, the electric control valve 22 is opened, and then the piston 24 and the rubber pad 25 repeatedly compress the air in the piston cylinder 23, and the compressed air is output through the second connecting pipe 21, the first connecting pipe 17, the two lung models 15 and the trachea 13, so as to simulate the normal breathing state of the human body. At the same time, when the colored foam balls (droplets) fall through the feed port 7, some of the colored foam balls (droplets) are sucked into the two lung models 15 through the mouth model 10 and the nose model 9, thereby simulating the virus infection process during normal breathing of the human body.

[0046] Embodiment 2

[0047] The difference between this embodiment and the first embodiment is that one end of the first connecting tube 17 located in the two lung models 15 is fixedly connected to a filter screen, which can intercept colored foam balls (droplets). At the same time, the trachea 13, the two lung models 15, the first connecting tube 17 and the second connecting tube 21, the mouth model 10 and the nose model 9 are all detachably connected, which is convenient for subsequent disassembly and cleaning.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A teaching aid for droplet propagation demonstration, characterized in that: include: Table body (1); A transparent cover (2), the transparent cover (2) is fixedly mounted on the top of the table body (1), a door (4) is hingedly connected to one side of the transparent cover (2), a handle (5) is fixedly connected to one side of the door (4), and a feed port (7) is opened on the top of the transparent cover (2); A mounting groove (32), the mounting groove (32) is opened on the top of the table body (1), a reciprocating mechanism is arranged in the mounting groove (32), a vertical plate (44) is fixedly installed on the top of the table body (1), a piston cylinder (23) is installed on the vertical plate (44), a breathing simulation mechanism is arranged in the piston cylinder (23), and the breathing simulation mechanism is used to simulate human breathing; A human body model (3) is installed on the top of a table body (1); a mouth model (10) and a nose model (9) are connected to the human body model (3); a mounting cavity (12) is provided in the human body model (3); two lung models (15) are mounted in the mounting cavity (12); the two lung models (15) are connected to the same trachea (13); the trachea (13) is connected to the mouth model (10) and the nose model (9); a plurality of bronchi (14) are fixedly connected to the trachea (13); and the plurality of bronchi (14) are respectively located in the two lung models (15).

2. A droplet propagation demonstration teaching aid according to claim 1, characterized in that: An electric push rod (37) is fixedly installed on the top of the transparent cover (2); an output shaft of the electric push rod (37) is fixedly connected to a U-shaped frame (38); a mask (39) is connected to the U-shaped frame (38); and the mask (39) matches the mouth model (10) and the nose model (9).

3. A droplet propagation demonstration teaching aid according to claim 2, characterized in that: A controller (19) is fixedly installed in the installation cavity (12), LED light strips (16) are installed on the outsides of the two lung models (15), pressure sensors (18) are fixedly installed in the two lung models (15), and the two pressure sensors (18), the controller (19) and the LED light strips (16) are connected in sequence.

4. A droplet propagation demonstration teaching aid according to claim 3, characterized in that: A high-pressure air pump (20) is fixedly mounted on the inner wall of the bottom of the mounting cavity (12); an output port of the high-pressure air pump (20) is fixedly connected to a first connecting pipe (17); the first connecting pipe (17) is fixedly connected to two lung models (15); and a player (11) is fixedly mounted on the mouth model (10).

5. A droplet propagation demonstration teaching aid according to claim 4, characterized in that: A through hole is provided on the inner wall of one side of the installation groove (32), and a rotating shaft (31) is rotatably installed in the through hole. A motor (30) is fixedly installed on one side of the table body (1), and the output shaft of the motor (30) is fixedly connected to one end of the rotating shaft (31). An eccentric wheel (28) is fixedly connected to the other end of the rotating shaft (31), and an annular limiting groove (29) is provided on the outer side of the eccentric wheel (28).

6. A droplet propagation demonstration teaching aid according to claim 5, characterized in that: The breathing simulation mechanism comprises a piston (24), the piston (24) is slidably mounted in a piston cylinder (23), a rubber pad (25) is fixedly connected to the top of the piston (24), the piston cylinder (23) and a first connecting tube (17) are fixedly connected to a second connecting tube (21), and an electric control valve (22) is connected to the second connecting tube (21).

7. A droplet propagation demonstration teaching aid according to claim 6, characterized in that: The reciprocating mechanism comprises a guide rod (26). A sliding hole is provided at the bottom of the piston cylinder (23). The guide rod (26) is slidably mounted in the sliding hole. One end of the guide rod (26) is fixedly connected to the bottom of the piston (24). The other end of the guide rod (26) is slidably mounted in an annular limiting groove (29). A return spring (27) is sleeved on the outer side of the guide rod (26). The two ends of the return spring (27) are respectively fixedly connected to the inner wall of the bottom of the piston cylinder (23) and the bottom of the piston (24).

8. A droplet propagation demonstration teaching aid according to claim 7, characterized in that: A bellows (6) is fixedly mounted on one side of the door (4); an air outlet (33) is provided on an inner wall of one side of the bellows (6); the air outlet (33) is communicated with the transparent cover (2); an air inlet is provided on the other side of the bellows (6); a mesh plate (34) is fixedly mounted inside the air inlet.

9. A droplet propagation demonstration teaching aid according to claim 8, characterized in that: Support rods (35) are fixedly mounted on the top inner wall and the bottom inner wall of the bellows (6), one end of the two support rods (35) is fixedly connected to the same fan (36), and a control panel (8) is fixedly mounted on the outer side of the table body (1).

10. A droplet propagation demonstration teaching aid according to claim 9, characterized in that: The control panel (8) is provided with a first button (40), a second button (41), a third button (42) and a fourth button (43); the first button (40) is connected to the high-pressure air pump (20) and the player (11); the second button (41), the third button (42) and the fourth button (43) are connected to the electric push rod (37), the fan (36) and the motor (30) respectively.

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