Teaching equipment suitable for various physical experiments

Abstract

The invention relates to the technical field of light refraction imaging, in particular to teaching equipment suitable for various physical experiments, and aims to solve the problems that in an optical experiment, lenses of different types or specifications need to be frequently replaced, operation complexity is increased, even imaging position changes are caused, and experiment efficiency is affected. Comprising a storage rack, the storage rack is connected with a first sliding table and a second sliding table, a light source assembly is arranged on the first sliding table, and a panel is arranged on the second sliding table; the supporting table is located between the first sliding table and the second sliding table. The lens assembly is arranged on the supporting table. A plurality of scale marks are etched on the storage rack in the length direction, and the thickness and the radian of the lens assembly can be changed. When an experiment is carried out, the thickness or the structure of the lens assembly is adjusted, the lens assembly is converted into a convex lens or a concave lens according to different requirements, the light source assembly penetrates through the lens assembly, an image is formed on the panel, various lenses and specifications of the lens assembly can be changed according to the requirements, various refraction laws are achieved, and the experiment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of light refraction imaging, and in particular to a teaching device suitable for various physical experiments. Background Art

[0002] In traditional optical experiments, optical lens imaging experiments are an important part of school physics experiment teaching, mainly used to help students understand the refraction and imaging laws of light. Among them, convex lenses and concave lenses are the core devices for demonstrating the refraction and imaging principles of light. However, the curvature and focal length of these lenses are fixed. If different imaging effects need to be demonstrated in the experiment, such as the conversion from convex lenses to concave lenses, imaging with lenses of different focal lengths, etc., it is usually necessary to prepare lenses of various specifications separately. In order to demonstrate the different imaging characteristics of convex lenses and concave lenses in optical systems, traditional experiments require the separate configuration of multiple lenses, such as convex lenses, concave lenses, and water lenses of different focal lengths.

[0003] The curvature and focal length of existing experimental lenses are fixed and cannot be adjusted dynamically according to teaching needs. In order to demonstrate the imaging effects of different focal lengths, the experiment requires lenses of various specifications, which not only increases the equipment requirements, but also limits the flexibility of the experiment and makes it difficult to adapt to diverse teaching content. Students can only observe the imaging effect by replacing the lens and cannot directly participate in the adjustment process of the lens curvature. This experimental method is passive and single, and it is difficult to stimulate students' interest in learning and innovation. Students cannot intuitively feel the impact of changes in optical parameters on imaging effects during the experiment.

[0004] In addition, frequently replacing lenses of different types or specifications during experiments not only increases the complexity of operations, but may also cause changes in imaging positions. Students need to constantly adjust the relative positions of the light source, screen, and lens, affecting experimental efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is that in the school optical lens imaging experiment, lenses of different specifications and types need to be replaced for observation and learning, and the operation is cumbersome and complicated, which affects the experimental efficiency. The purpose is to provide a teaching device suitable for a variety of physical experiments, which can realize the imaging and refraction laws of a variety of lenses, facilitate students' observation, stimulate their interest in learning, and improve experimental efficiency.

[0006] The present invention is achieved through the following technical solutions: A teaching device suitable for a variety of physical experiments, including: A storage rack, wherein the storage rack is slidably connected to a first slide and a second slide along a length direction, the first slide is provided with a light source assembly, and the second slide is provided with a panel; A support platform, the support platform is slidably connected to the storage rack, and the support platform is located between the first slide platform and the second slide platform; A lens assembly, wherein the lens assembly is arranged on the support platform; The rack is etched with a plurality of scale lines along the length direction, the incident light port of the light source assembly, the lens assembly and the panel are arranged parallel to each other, and the thickness and curvature of the lens assembly are changeable.

[0007] In the above technical solution, when conducting experiments, the thickness or structural style of the lens assembly is adjusted, and the lens assembly is transformed into a convex lens or a concave lens according to different needs. The light source assembly is used to pass through the lens assembly to form an image on the panel. The lens assembly can be transformed into a variety of lenses and specifications according to needs, realize a variety of refraction laws, and improve experimental efficiency.

[0008] In some optional technical solutions, the lens assembly includes a limiting shell, a flexible balloon and a water injection tube. The flexible balloon is connected to a gasket in the circumferential direction. The top of the flexible balloon is connected to the water injection tube. The limiting shell is used to clamp the gasket to fix the flexible balloon. A through hole is opened in the center of the limiting shell, and the flexible balloon is located in the through hole.

[0009] In the above technical solution, the water injection pipe injects solution into the flexible balloon to make the flexible balloon expand and change to form a water lens, and the limiting shell clamps the gasket for fixing.

[0010] In some optional technical solutions, transparent sheets are arranged on both sides of the through hole, the transparent sheets are in contact with the flexible balloon, and each of the transparent sheets is bent toward the outside.

[0011] In the above technical solution, two transparent sheets clamp the flexible balloon to fix it. After the flexible balloon expands, it is restricted and deformed by the transparent sheets, and fits with the transparent sheets to become a convex lens structure, so that a convex lens imaging experiment can be carried out.

[0012] In some optional technical solutions, a plurality of through grooves are opened on the limit shell in the vertical direction, the transparent thin sheet is located in the through grooves, a clamping plate is slidably connected in the through grooves, the clamping plate can slide along the through grooves, and the clamping plate is connected to the transparent thin sheet.

[0013] In the above technical solution, the clamping plate can control the movement of the transparent sheet and change the thickness of the convex lens.

[0014] In some optional technical solutions, the support platform is hinged with pressure plates along both sides of the flexible balloon, and the middle part of the pressure plates is bent toward the flexible balloon.

[0015] In the above technical solution, the rotating pressing plate presses the transparent sheet, causing the transparent sheet to bend toward the flexible balloon, thereby forming a concave lens structure.

[0016] In some optional technical solutions, the water injection pipe is located above the limiting shell, and the water injection pipe and the flexible balloon are filled with a solution, the solution is a sodium chloride solution, and the refractive index of the solution is 1.33-1.40.

[0017] In the above technical solution, in order to enable the flexible balloon to better achieve the refraction and imaging effects of the concave lens and the convex lens, a sodium chloride solution with a similar refractive index is selected as the filler.

[0018] In some optional technical solutions, the light source assembly includes a driving power supply, a shield shell and an image light, wherein the image light and the driving power supply are both located inside the shield shell, and a first button is provided on the shield shell, and the first button is used to control the opening and closing of the image light through the driving power supply. A groove is provided on the shield shell, and a light shield is slidably connected to the groove, and an image hole is provided on the light shield, and the width of the image hole gradually increases or decreases downward in the height direction. The incident light of the image light passes through the image hole and the flexible balloon and is formed on the panel, and the height of the second slide is adjustable.

[0019] In the above technical solution, the image light can be turned on by turning on the first button. The light beam of the image light passes through the image hole and then passes through the flexible balloon to form an image on the panel. The image hole has different widths from top to bottom, which is convenient for the experimenter to observe the imaging rules.

[0020] In some optional technical solutions, the light source assembly also includes several laser lamps arranged side by side, and a second button is provided on the cover shell. The second button is used to control the opening and closing of the laser lamp through the driving power supply. The incident light of the laser lamp is used to penetrate the flexible balloon, and the height of the first slide is adjustable.

[0021] In the above technical solution, the second button is turned on to control the laser light to turn on, and several laser lights pass through the flexible balloon, so that the experimenter can observe the refraction law of light under different lenses.

[0022] In some optional technical solutions, hinge shafts are provided in the middle of the first slide and the support platform, and the first slide and the support platform can rotate in the same direction.

[0023] In the above technical solution, the first slide and the support table can be rotated in the same direction to be parallel to the rack. After the laser light irradiates the flexible balloon, it can be more intuitively presented on the top surface of the rack, which is convenient for the experimenter to observe.

[0024] In some optional technical solutions, a turntable is provided in the rack, and the turntable is a triangular prism structure. The turntable includes a first end face and a second end face, and a first side face, a second side face and a third side face located between the first end face and the second end face. A rotating shaft connected to the rack is provided between the first end face and the second end face, and a handle connected to the rotating shaft is provided on one side of the rack. The support platform is provided on the third side face, and a plane mirror is provided on the first side face. An angle line is engraved on the surface of the first side face along the center of the plane mirror. A first prism is rotatably connected to the center of the second side face, and the first prism is detachably connected. An annular groove is provided on the second side face along the center of the first prism, and a second prism is rotatably connected in the annular groove. Each rotation angle of the rotating shaft is 120°.

[0025] In the above technical solution, by rotating the turntable, the first side, the second side and the third side of the turntable are controlled to be located on the rack respectively, and different lenses are provided on each side, so that the experimenter can understand the imaging and refraction laws of light under different lenses.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. In the present invention, the size of the flexible balloon can be changed by injecting or extracting a solution into the flexible balloon. The flexible balloon is bonded to the transparent sheets protruding on both sides to form a convex lens structure. The imaging experiment of the convex lens can be carried out by the image lamp of the light source assembly. The experiment of the light refraction law of the convex lens can be intuitively seen by the laser lamp. The transparent sheet is pressed by the pressing plate to bend the transparent sheet toward the flexible balloon to form a concave lens structure with the bonded flexible balloon, and the concave lens imaging and light refraction experiments can be carried out. In addition, the position of the transparent sheet can be moved by the clamping plate to adjust the thickness of the convex lens or concave lens. The optical experiments of convex lens, concave lens and even water lens can be realized on the same lens assembly, which can greatly improve the learning interest of the experimenter, deepen the learning memory, and improve the experimental efficiency. 2. In the present invention, the transparent sheet can be parallel to the rack by rotating the first slide and the support table in the same direction. After the laser lamp is passed through the flexible balloon, the regular changes of light refraction can be better observed. At the same time, when the flexible balloon and the transparent sheet are convex lens structures, the focal length position can be detected in combination with the scale line branch of the rack. 3. The present invention can utilize a turntable to rotate different lenses located above the rack. Combined with the light source assembly, the light refraction law, prism refraction and dispersion, and the imaging and refraction law of convex lenses and concave lenses can be observed, so that the observer can understand the most basic refraction and imaging laws in optics in a timely manner, deepen the influence, and save time in replacing lenses and experimental equipment, thereby speeding up experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 It is a structural schematic diagram of the support platform in the present invention; Figure 4 It is a cross-sectional view of the support platform after rotation in the present invention; Figure 5 An exploded view of the support platform and the lens assembly in the present invention; Figure 6 is a cross-sectional view of the light source assembly of the present invention; Figure 7 It is a light refraction diagram when the flexible balloon and the transparent sheet in the present invention form a convex lens; Figure 8 It is a light refraction diagram when the flexible balloon and the transparent sheet in the present invention form a concave lens; Fig. 9 It is a structural schematic diagram of the transfer station of the present invention; Fig.10 It is a cross-sectional view of the storage rack in the present invention.

[0028] The reference numerals represent: 1. Storage rack; 11. First slide; 12. Second slide; 13. Turntable; 2. Support platform; 21. Pressing plate; 3. Limiting shell; 31. Clamping plate; 4. Flexible balloon; 41. Water injection pipe; 5. Transparent sheet; 6. Shield shell; 61. Image light; 62. Laser light; 63. Image hole; 7. Plane mirror; 81. First prism; 82. Second prism; 9. Panel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0030] Example 1 like Figures 1 to 8 , Fig.10 As shown, this embodiment provides a teaching device suitable for a variety of physical experiments, including: The rack 1 is slidably connected to a first slide 11 and a second slide 12 along the length direction, the first slide 11 is provided with a light source assembly, and the second slide 12 is provided with a panel 9; A support platform 2, the support platform 2 is slidably connected to the storage rack 1, and the support platform 2 is located between the first slide 11 and the second slide 12; A lens assembly, wherein the lens assembly is arranged on a support platform 2; The rack 1 is etched with a number of scale lines along the length direction, the incident light port of the light source assembly, the lens assembly and the panel 9 are arranged parallel to each other, and the thickness and curvature of the lens assembly can be changed.

[0031] like Figures 3 to 5 As shown, the lens assembly includes a limiting shell 3, a flexible balloon 4 and a water injection pipe 41. A gasket is connected to the flexible balloon 4 in the circumferential direction. The top of the flexible balloon 4 is connected to the water injection pipe 41. The limiting shell 3 is used to clamp the gasket to fix the flexible balloon 4. A through hole is opened in the center of the limiting shell 3, and the flexible balloon 4 is located in the through hole.

[0032] like Figures 3 to 5 As shown, transparent sheets 5 are arranged on both sides of the through hole, the transparent sheets 5 are in contact with the flexible balloon 4, and each transparent sheet 5 is bent toward the outside.

[0033] like Figures 3 to 5 As shown, a plurality of through slots are provided on the limit housing 3 in the vertical direction, and the transparent sheet 5 is located in the through slots. A clamping plate 31 is slidably connected in the through slots. The clamping plate 31 can slide along the through slots and is connected to the transparent sheet 5 .

[0034] like Figures 3 to 5 As shown, the support platform 2 is hinged with a pressing plate 21 along both sides of the flexible balloon 4 , and the middle part of the pressing plate 21 is bent toward the flexible balloon 4 .

[0035] The water injection pipe 41 is located above the limiting shell 3 , and the water injection pipe 41 and the flexible balloon 4 are filled with a solution, which is a sodium chloride solution, and the refractive index of the solution is 1.33-1.40.

[0036] like Figure 6 As shown, the light source assembly includes a driving power supply, a shield shell 6 and an image light 61. The image light 61 and the driving power supply are both located inside the shield shell 6. A first button is provided on the shield shell 6. The first button is used to control the opening and closing of the image light 61 through the driving power supply. A groove is provided on the shield shell 6. A light shield is slidably connected to the groove. An image hole 63 is provided on the light shield. The width of the image hole 63 gradually increases or decreases downward along the height direction. The incident light of the image light 61 passes through the image hole 63 and the flexible balloon 4 and is formed on the panel 9. The height of the second slide 12 is adjustable.

[0037] Specifically, the bottom surface of the storage rack 1 is connected with a base, which can make the storage rack 1 more stable during experiments; the flexible balloon 4 and the water injection pipe 41 are integrated, and both the flexible balloon 4 and the water injection pipe 41 are flexible. Preferably, the water injection pipe 41 is detachably connected with a water injector, and the water injector is used to inject water into the flexible balloon 4 through the water injection pipe 41. The interior of the flexible balloon 4 is filled with the solution and then expands. Because the water injector is directly connected to the water injection pipe 41, when the water injector pumps water in reverse, the water in the flexible balloon 4 will flow back and the flexible balloon 4 will become deflated. Students doing experiments can achieve the effect of a water lens through this operation.

[0038] Preferably, the solution is a sodium chloride solution with a refractive index of 1.33-1.40, which is close to the refractive index of a convex lens and a concave lens, and the transparent sheet 5 is a highly transparent material to facilitate clear imaging.

[0039] The flexible balloon 4 can be combined with the transparent sheet 5 to form a convex lens or a concave lens effect.

[0040] When doing the convex lens imaging experiment, first move the position of the transparent sheet 5 by sliding the clamping plate 31. When the transparent sheet 5 is in the initial state, the transparent sheet 5 is bent toward the outside. After the two transparent sheets 5 are in contact with the flexible balloon 4 filled with solution, the solution can be injected into the flexible balloon 4 again through the water injector. The flexibility of the flexible balloon 4 will expand to fit with the transparent sheet 5. At this time, stop the operation. The two transparent sheets 5 bent toward the outside and the flexible balloon 4 fitted inside are combined into a convex lens structure.

[0041] Turn on the first button on the mask shell 6, turn on the image light 61 and close the light shield. The light emitted by the image light 61 passes through the image hole 63 and penetrates the flexible balloon 4 to form an image on the panel 9. Preferably, the upper and lower widths of the image hole 63 are inconsistent, and can be a teardrop shape, a triangle, or letters with different upper and lower shapes, etc., in order to facilitate students to observe the image on the panel 9.

[0042] It should be noted that the convex lens also has a focal length, and the difference in focal length will affect the distance during measurement. In the present invention, the gasket of the flexible balloon 4 is fixed in the limiting shell 3, and the distance between the flexible balloon 4 and the transparent sheet 5 can be changed by moving the two transparent sheets 5, and an appropriate amount of solution can be injected to make the flexible balloon 4 fit the transparent sheet 5, thereby changing the focal length of the convex lens, so that students can personally experience the changes of the convex lens when the focal length is different.

[0043] After completing the convex lens experiment, the concave lens imaging experiment is performed immediately. The clamping plate 31 is moved to drive the transparent thin sheet 5 away from the flexible balloon 4. Then, the clamping plate 31 is fixed by hand and the rotating pressure plate 21 is pressed toward the transparent thin sheet 5. The transparent thin sheet 5 is pressed and bends toward the flexible balloon 4. The transparent thin sheet 5 is moved to the flexible balloon 4 again. The flexible balloon 4 is compressed and deformed. The solution is injected into the flexible balloon 4 to continue to deform until it fits with the two transparent thin sheets 5. After completion, the operation is stopped, so that the transparent thin sheet 5 and the flexible balloon 4 form a concave lens structure. The image light 61 and the movable panel 9 can be turned on by the above-mentioned convex lens method to observe the concave lens imaging. After the concave lens imaging experiment is completed, the transparent thin sheet 5 can be reset by pressing it with a clean handkerchief.

[0044] Scale lines are etched on the rack 1 to facilitate recording of imaging rules in experiments. The first slide 11 and the second slide 12 can slide along the height direction to facilitate observation of the position and size of the imaging.

[0045] Example 2 like Figure 4 As shown, hinge shafts are provided in the middle of the first slide 11 and the support platform 2, and the first slide 11 and the support platform 2 can rotate in the same direction.

[0046] The light source assembly also includes a plurality of laser lamps 62 arranged side by side. A second button is provided on the shield shell 6. The second button is used to control the opening and closing of the laser lamp 62 through a driving power supply. The incident light of the laser lamp 62 is used to penetrate the flexible balloon 4. The height of the first slide 11 is adjustable.

[0047] The method of operating the flexible balloon 4 to form a convex lens and a concave lens in this embodiment is consistent with that in embodiment 1, the only difference is that embodiment 1 is used for imaging experiments, while this embodiment is mainly used to observe the law of light refraction.

[0048] Specifically, the first slide 11 and the support platform 2 can be rotated 90° in the same direction so that the convex lens or concave lens of the deformed flexible balloon 4 is parallel to the rack 1, and then the second button is turned on to turn on the laser light 62. Preferably, the number of laser lights 62 is 3, and they are set at the same height spacing as the flexible balloon 4.

[0049] In this embodiment, the flexible balloon 4 is transformed into a convex lens as an example for explanation. After the laser lamp 62 is turned on, three laser beams are emitted to penetrate the flexible balloon 4 and two transparent sheets 5. When the laser penetrates the last transparent sheet 5, light reflection occurs. Preferably, the laser lamp 62 located in the middle should be aligned with the center of the flexible balloon 4, that is, the light can be refracted downward after the first laser lamp 62 passes through, the light path of the second laser lamp 62 remains unchanged, and the light is refracted upward after the third laser lamp 62 passes through. The three light rays converge to a point, which is the focal length. Preferably, the top surface of the storage rack 1 can be etched with scale lines to facilitate observation and recording of the focal length. The same is true for concave lenses. The law of light refraction is common knowledge and will not be repeated here.

[0050] This embodiment can better observe the light refraction law on the basis of the embodiment 1 and deepen the memory of the experimenter.

[0051] Example 3 like Fig. 9 and Fig.10 As shown, a turntable 13 is arranged in the rack 1, and the turntable 13 is a triangular prism structure. The turntable 13 includes a first end face and a second end face, and a first side face, a second side face and a third side face located between the first end face and the second end face. A rotating shaft connected to the rack 1 is arranged between the first end face and the second end face, and a handle connected to the rotating shaft is arranged on one side of the rack 1. The support platform 2 is arranged on the third side face, and a plane mirror 7 is arranged on the first side face. An angle line is engraved on the surface of the first side face along the center of the plane mirror 7. A first triangular prism 81 is rotatably connected to the center of the second side face, and the first triangular prism 81 is detachably connected. An annular groove is opened on the second side face along the center of the first triangular prism 81, and a second triangular prism 82 is rotatably connected in the annular groove. Each rotation angle of the rotating shaft is 120°.

[0052] Specifically, the optical experiment also includes an experiment on the refraction and reflection rules of a prism. In this embodiment, different optical experiments can be switched by turning the handle. The handle is fixedly connected to the rotating shaft. The shelf is provided with a long groove downward. The rotating shaft passes through the long groove and is rotatably connected to the shelf. The first slide and the second slide can slide along the long groove. The turntable is located in the long groove, and the depth of the long groove is greater than the maximum height of the lens assembly on the turntable.

[0053] Turn the handle until the third side of the turntable is facing upward, that is, the support platform 2 is facing upward, such as the convex lens and concave lens imaging and light refraction experiments in Examples 1 and 2; turn the handle until the first side of the turntable is facing upward, which is an experiment with a plane mirror 7, and the top surface of the first plane is provided with angle lines, and the laser pen can be held by hand to illuminate along one of the angle lines to obtain the reflection angle from the plane mirror 7, that is, the incident angle is equal to the reflection angle; turn the handle again until the second side of the turntable is facing upward, the first prism 81 is located in the center and can be rotated, and the laser light 62 can be turned on to illuminate the first prism 81 to view the changes in light when the light enters the prism. In addition, indoors and in rainy weather, white light can be illuminated into the first prism 81 to cause light dispersion, and the second prism 82 can be rotated along the annular groove to align the surface of the second prism 82 with the dispersed light emitted by the first light prism, and it can be observed that the second prism 82 emits white light again, which enhances the experimenter's impression.

[0054] In the present invention, a teaching device can be used to help students understand the most basic experimental projects in optical experiments and deepen students' impressions. At the same time, multiple experiments on one device can save experimental steps and distinguish the laws of light refraction under different lenses.

[0055] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A teaching device suitable for various physical experiments, characterized in that: include: A storage rack (1), wherein the storage rack (1) is slidably connected to a first slide (11) and a second slide (12) along a length direction, a light source assembly is arranged on the first slide (11), and a panel (9) is arranged on the second slide (12); A support platform (2), the support platform (2) being slidably connected to the storage rack (1), the support platform (2) being located between the first slide platform (11) and the second slide platform (12); A lens assembly, wherein the lens assembly is arranged on the support platform (2); The storage rack (1) is etched with a plurality of scale lines along its length, the incident light port of the light source assembly, the lens assembly and the panel (9) are arranged parallel to each other, and the thickness and curvature of the lens assembly are changeable.

2. A teaching device suitable for a variety of physical experiments according to claim 1, characterized in that: The lens assembly comprises a limiting shell (3), a flexible balloon (4) and a water injection pipe (41); a gasket is connected to the circumferential direction of the flexible balloon (4); the upper part of the flexible balloon (4) is connected to the water injection pipe (41); the limiting shell (3) is used to clamp the gasket to fix the flexible balloon (4); a through hole is opened at the center of the limiting shell (3), and the flexible balloon (4) is located in the through hole.

3. A teaching device suitable for a variety of physical experiments according to claim 2, characterized in that: Transparent sheets (5) are arranged on both sides of the through hole, the transparent sheets (5) are in contact with the flexible balloon (4), and each of the transparent sheets (5) is bent towards the outside.

4. A teaching device suitable for various physical experiments according to claim 3, characterized in that: The limit housing (3) is provided with a plurality of through slots in the vertical direction, the transparent sheet (5) is located in the through slots, a clamping plate (31) is slidably connected in the through slots, the clamping plate (31) can slide along the through slots, and the clamping plate (31) is connected to the transparent sheet (5).

5. A teaching device suitable for various physical experiments according to claim 3, characterized in that: The support platform (2) is hingedly connected with a pressure plate (21) along two sides of the flexible balloon (4), and the middle part of the pressure plate (21) is bent towards the flexible balloon (4).

6. A teaching device suitable for various physical experiments according to claim 3, characterized in that: The water injection pipe (41) is located above the limiting shell (3), and the water injection pipe (41) and the flexible balloon (4) are filled with a solution, the solution is a sodium chloride solution, and the refractive index of the solution is 1.33-1.

40.

7. A teaching device suitable for various physical experiments according to claim 2, characterized in that: The light source assembly comprises a driving power source, a shield shell (6) and an image light (61), wherein the image light (61) and the driving power source are both located in the shield shell (6), and a first button is provided on the shield shell (6), and the first button is used to control the image light (61) to be turned on and off by the driving power source. A groove is provided on the shield shell (6), and a light shield is slidably connected to the groove. An image hole (63) is provided on the light shield, and the width of the image hole (63) gradually increases or decreases downward along the height direction. Incident light of the image light (61) passes through the image hole (63) and the flexible balloon (4) and is formed on the panel (9), and the height of the second slide (12) is adjustable.

8. A teaching device suitable for various physical experiments according to claim 7, characterized in that: The light source assembly further comprises a plurality of laser lamps (62) arranged side by side. A second button is arranged on the cover shell (6). The second button is used to control the on and off of the laser lamps (62) through the driving power supply. The incident light of the laser lamps (62) is used to penetrate the flexible balloon (4). The height of the first slide table (11) is adjustable.

9. A teaching device suitable for various physical experiments according to claim 8, characterized in that: A hinge shaft is provided in the middle of the first slide platform (11) and the support platform (2), and the first slide platform (11) and the support platform (2) are both capable of rotating in the same direction.

10. The teaching device applicable to various physical experiments according to claim 1, characterized in that: A turntable (13) is arranged inside the storage rack (1), and the turntable (13) is a triangular prism structure. The turntable (13) comprises a first end face and a second end face, and a first side face, a second side face and a third side face located between the first end face and the second end face. A rotating shaft connected to the storage rack (1) is arranged between the first end face and the second end face. A handle connected to the rotating shaft is arranged on one side of the storage rack (1). The support platform (2) is arranged on the third side face. A plane mirror (7) is arranged on the first side face. An angle line is engraved on the surface of the first side face along the center of the plane mirror (7). A first triangular prism (81) is rotatably connected to the center of the second side face. The first triangular prism (81) is detachably connected. An annular groove is provided on the second side face along the center of the first triangular prism (81). A second triangular prism (82) is rotatably connected in the annular groove. The rotation angle of the rotating shaft is 120° each time.

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