Rotating curved surface demonstration teaching aid and use method thereof

Abstract

The invention discloses a rotating curved surface demonstration teaching aid and a use method thereof, and belongs to the technical field of teaching demonstration teaching aids. Aiming at the limitations that an existing teaching aid is single in function, cannot dynamically display the principle of a rotating curved surface and the like, a bottom bracket is arranged, a mounting frame is arranged on the bottom bracket, a light emission adjusting mechanism, a bus forming mechanism and a bus verification mechanism are further arranged, and the light emission adjusting mechanism is arranged on the bottom bracket; the variable resistor is used for controlling the light emission adjusting mechanism to adjust the position of the laser emitter on the light emission adjusting mechanism, the bus forming mechanism is located above the bottom bracket and detachably connected to the mounting frame, and the bus verification mechanism is arranged above the bottom bracket and matched with the bus forming mechanism. According to the demonstration teaching aid, rotating curved surfaces of different sizes can be displayed through adjustment, visual display and dynamic verification of a formed bus are carried out, students can understand and master knowledge of the rotating curved surfaces more deeply, and the teaching quality is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of teaching demonstration aids, and in particular to a rotating curved surface demonstration aid and a use method thereof. Background Art

[0002] A surface of revolution is a surface formed by a plane curve rotating around a fixed straight line in the plane in which it lies. This fixed straight line is called the axis of revolution, and the plane curve is called the generatrix of the surface of revolution. Surfaces of revolution have a wide range of applications in engineering, physics, and other scientific fields. For example, they are used to form curved parts in the manufacturing process, to describe the motion of rotating objects in physics, and to create complex surface models in computer graphics. However, the concept of a surface of revolution is relatively abstract, and students often find it difficult to fully understand its three-dimensional form and properties through plane graphics or text descriptions. As a key teaching content in spatial analytic geometry, calculus, etc., the formation principle of a surface of revolution requires students to have a strong sense of space and imagination in order to have a deep understanding, which is a great challenge for modern teaching and students' knowledge mastery.

[0003] Traditional teaching aids for rotating surfaces, such as flat charts or models, have many limitations, such as single function, complex operation, and inability to dynamically display the surface formation process and changing characteristics, resulting in poor teaching results. Most teaching aids are only used by teachers in classroom teaching. Students cannot directly participate in and experience the forming process of rotating surfaces, which makes students lack active cognition of the formation principles and is only passively instilled, failing to mobilize students' enthusiasm.

[0004] To this end, a more intuitive, vivid and participatory rotating surface demonstration teaching aid is developed, which can not only help students better understand the formation process of rotating surfaces and better understand and master the relevant knowledge of rotating surfaces, but also enable students to actively participate in this formation process and grasp the learning content more deeply. It is of great significance for improving teaching quality, stimulating learning interest, cultivating spatial imagination ability, promoting educational equity and promoting teaching reform. Summary of the invention

[0005] In view of the defects existing in the above-mentioned prior art, the purpose of the present invention is to provide a rotating curved surface demonstration teaching aid and a method of using the same, so as to solve the problems existing in the above-mentioned background technology.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The rotating curved surface demonstration teaching aid comprises a bottom support seat, a mounting frame is arranged on the bottom support seat, and further comprises: The light emission adjustment mechanism is arranged on the bottom bracket, and a laser emitter is arranged on the light emission adjustment mechanism. The position of the laser emitter is adjusted by controlling the light emission adjustment mechanism through a variable resistor; The busbar forming mechanism is located above the bottom bracket and is detachably connected to the mounting frame, and is used to present a busbar forming shape of a rotating curved surface; The busbar verification mechanism is arranged above the bottom bracket and cooperates with the busbar forming mechanism to verify the effect of the formed busbar.

[0007] As a further preferred embodiment of the above technical solution, the light emission adjustment mechanism includes a pull rope assembly and an adjustment assembly. The pull rope assembly is connected to the bottom bracket through a rope fixing frame. The adjustment assembly is arranged inside the bottom bracket and below the rope fixing frame.

[0008] As a preferred embodiment, the pull rope assembly includes several elastic ropes and several rigid ropes, one end of each rigid rope is fixedly connected to the rope fixing frame, and the other end is connected to the distal end of each corresponding elastic rope after passing through the fixed pulley on the bottom support seat, and the proximal end of each elastic rope is fixedly connected to the bottom support seat.

[0009] As a preferred embodiment, the adjustment component includes a conductive coil, an electromagnetic coil, a metal ring and a spring. The conductive coil is installed in a base support and is electrically connected to the variable resistor. The electromagnetic coil is arranged on the top of the conductive coil. The metal ring is connected to the bottom of the rope frame above the electromagnetic coil. The spring is installed in the middle of the electromagnetic coil and its two ends are respectively connected to the base support and the rope frame.

[0010] As a further preferred embodiment of the above technical solution, the busbar forming mechanism includes a plurality of forming paperboards inserted on a mounting frame, and the shaped busbar shape is displayed through the forming paperboards.

[0011] As a further preferred embodiment of the above technical solution, the busbar verification mechanism includes a telescopic cross bar and a verification rod, the fixed end of the telescopic cross bar is connected to the middle of the base, the verification rod is connected to the free end of the telescopic cross bar, and the verification rod is at the same angle as the laser emitter.

[0012] A further preferred solution is that the verification rod is inserted into the cutting seam of the busbar forming mechanism.

[0013] On the other hand, the present invention also discloses a method for using the rotating curved surface demonstration teaching aid, comprising the following steps: Step 1: Turn on the variable resistor and adjust the current in the conductive coil. The conductive coil generates an induced magnetic field on the electromagnetic coil, so that the electromagnetic coil attracts the metal ring to drive the fixed rope frame to move downward. When the fixed rope frame moves downward, the elastic rope is stretched through the rigid rope to adjust the laser transmitter to the required position. Step 2: Turn on the laser transmitter and insert the thermal cardboard into the installation frame. The laser beam of the laser transmitter forms a light spot on the thermal cardboard, and the line connecting the light spots shows the generatrix shape of the rotation surface; Step 3: After taking out the thermal cardboard, cut a cutting seam along the line of the light spot, then insert the thermal cardboard into the installation frame, adjust the telescopic cross bar and the verification rod to match the laser transmitter, and then turn on the motor. The motor rotation drives the central axis and the telescopic cross bar and the verification rod to rotate synchronously. The verification rod passes through the cutting seam on the thermal cardboard in turn without contact, so as to verify the generatrix shape and forming principle of the rotating surface.

[0014] Compared with the prior art, the present invention can produce the following beneficial effects: The rotational surface demonstration teaching aid of the present invention is based on the demonstration demand of forming rotational surfaces of different sizes, and aims to use the teaching aid to demonstrate the formation of various rotational surfaces, which is easy for students to understand the forming principle. During the forming process, the forming generatrix of the rotational surface is visualized, and the students' understanding of the rotational surface formation process is deepened by further verifying the forming generatrix. The demonstration effect is more intuitive, which greatly improves the defects of the existing demonstration teaching aids, such as the single function and the inability to dynamically display the surface formation process. The teaching aid can be used in classroom teaching and student experience, enhance classroom interaction and participation, mobilize students' enthusiasm, and thus deeply master and understand the relevant knowledge of rotational surfaces.

[0015] 1. A light emission adjustment mechanism is set based on the principle of electromagnetic induction. The specific adjustment process is: by adjusting the resistance of the variable resistor to control the current of the conductive coil, the electromagnetic coil will form a magnetic field under the action of the energized conductive coil, and generate magnetic attraction to the metal ring above it, so that the metal ring and the fixed rope frame move downward synchronously. The downward movement of the fixed rope frame causes the rigid rope to move downward. At this time, the rigid rope will pull the elastic rope to stretch. During the stretching process, the elastic rope drives the T-shaped slide rail to slide along the waist-shaped hole, and the elongation of the elastic rope is used to synchronously move the laser transmitter to the required position.

[0016] 2. By setting up the busbar forming mechanism and the busbar verification machine, the laser beam of the laser transmitter is visually displayed using thermal cardboard, allowing students to visually see the forming busbar of the rotating surface, thereby clarifying the importance of the forming busbar in the formation process of the rotating surface. Then, cutting is performed along the forming busbar, and the forming principle of the rotating surface is dynamically verified based on the cutting seam. After adjusting the telescopic cross bar and the verification rod into place, the telescopic cross bar and the verification rod are driven by a motor to rotate synchronously. It is observed that during the rotation process, the verification rod can smoothly pass through the cutting seam without touching the thermal cardboard, thereby deepening students' understanding of the rotating surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1It is a schematic diagram of the overall structure of the rotating curved surface demonstration teaching aid of the present invention; Figure 2 It is a structural schematic diagram of the bottom bracket and the mounting frame of the present invention; Figure 3 is an internal cross-sectional view of the bottom bracket of the present invention; Figure 4 is a cross-sectional structural diagram of the light emission adjustment mechanism of the present invention; Figure 5 This is a diagram showing the coordination structure of the pull rope assembly and the adjustment assembly of the present invention; Figure 6 A diagram showing the matching relationship between the laser transmitter and the pull rope assembly of the present invention; Figure 7 A diagram showing the laser irradiation points of the molded paperboard of the present invention; Figure 8 A diagram showing a cutting seam on a formed paperboard of the present invention; Fig. 9 It is a schematic diagram of the structure of the busbar verification mechanism and the forming paperboard of the present invention; Fig.10 A schematic diagram of the relationship between the verification rod and the laser emitter of the present invention; In the figure: 1. base support; 11. upper cover plate; 12. circular plate; 2. light emission adjustment mechanism; 21. elastic rope; 22. rigid rope; 23. wire coil; 24. electromagnetic coil; 25. metal ring; 26. spring; 27. rope fixing frame; 3. busbar forming mechanism; 31. forming cardboard; 32. cutting seam; 4. busbar verification mechanism; 41. telescopic cross bar; 42. verification rod; 5. mounting frame; 51. mounting frame; 52. slot; 6. laser transmitter; 7. fixed pulley; 8. T-shaped slide rail; 9. variable resistor; 100. center axis; 200. motor; 300. connecting plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Embodiment 1: Reference Figure 1-10 The present invention provides a rotating curved surface demonstration teaching aid, including a base support 1, a mounting frame 5 is arranged on the base support 1, and also includes a light emission adjustment mechanism 2, a busbar forming mechanism 3 and a busbar verification mechanism 4. The light emission adjustment mechanism 2 is arranged on the base support 1, and a laser emitter 6 is arranged on the light emission adjustment mechanism 2. The position of the laser emitter 6 is adjusted by controlling the light emission adjustment mechanism 2 through a variable resistor 9. The busbar forming mechanism 3 is located above the base support 1 and is detachably connected to the mounting frame 5, and is used to present the formed busbar shape of the rotating curved surface. The busbar verification mechanism 4 is arranged above the base support 1 and cooperates with the busbar forming mechanism 3 to verify the effect of the formed busbar.

[0023] Specifically, the bottom bracket 1 is a cylindrical hollow structure consisting of a shell, a bottom plate and an upper cover plate 11. Figure 2 As shown, the upper cover 11 is in a circular shape, the bottom plate and the upper cover 11 are fixedly connected to the top and bottom of the shell respectively, a circular plate 12 is arranged in the middle of the upper cover 11, and the circular plate 12 is movably connected to the bottom bracket 1 through a central axis 100, and the central axis 100 passes through the middle of the circular plate 12 and extends to the top of the bottom bracket 1.

[0024] like Figure 2 As shown, the lower end of the mounting frame 5 is fixedly connected to the outer periphery of the bottom bracket 1, and the upper end of the mounting frame 5 extends to the top of the bottom bracket 1. In this embodiment, the mounting frame 5 is a "cross" shaped frame, and a slot 52 is formed through the side wall of the "cross" shaped frame. Four mounting frames 51 are vertically distributed in sequence above the bottom bracket 1, and the mounting frames 51 are used to install the busbar forming mechanism 3.

[0025] like Figure 3-5 As shown, the light emission adjustment mechanism 2 includes a pull rope assembly and an adjustment assembly. The pull rope assembly is connected to the base support 1 through a rope frame 27. The rope frame 27 is fixedly connected to the bottom of the circular plate 12. The pull rope assembly is arranged between the upper cover plate 11 and the rope frame 27. The adjustment assembly is arranged inside the base support 1 and below the rope frame 27.

[0026] In some preferred embodiments, the pull rope assembly includes a plurality of elastic ropes 21 and a plurality of rigid ropes 22, and each elastic rope 21 is fixedly connected to the corresponding rigid rope 22, one end of the rigid rope 22 is fixedly connected to the rope fixing frame 27, a plurality of fixed pulleys 7 are circumferentially arranged on the inner edge of the upper cover plate 11, the other end of the rigid rope 22 is wound around the fixed pulley 7, the other end of the rigid rope 22 is connected to the distal end of each corresponding elastic rope 21 after passing around the fixed pulley 7, a plurality of waist-shaped holes are circumferentially opened on the upper cover plate 11, and the proximal end of each elastic rope 21 is fixedly connected in the waist-shaped hole.

[0027] like Figure 6 As shown, the laser emitter 6 is connected to the elastic rope 21 through a T-shaped slide rail 8, and the T-shaped slide rail 8 is slidably matched with the waist-shaped hole. The light angle of the laser emitter 6 can be set in advance according to the forming state of the rotating curved surface. The laser emitter 6 is adjusted to a required position by cooperating with the adjustment component and the pull rope component, thereby forming rotating curved surfaces of different sizes; preferably, the adjustment component includes a wire coil 23, an electromagnetic coil 24, a metal ring 25 and a spring 26, the wire coil 23 is fixedly mounted on the bottom plate, and the wire coil 23 is electrically connected to the variable resistor 9, the electromagnetic coil 24 is mounted on a tray at the top of the wire coil 23, the metal ring 25 is connected to the bottom of the rope frame 27 above the electromagnetic coil 24, the spring 26 is mounted in the middle of the electromagnetic coil 24, and the two ends of the spring 26 are respectively connected to the top of the bottom plate and the bottom of the rope frame 27.

[0028] In this embodiment, the knob of the variable resistor 9 is adjusted to control the resistance in the conductive coil 23, thereby changing the current generated by the conductive coil 23. The current of the conductive coil 23 causes the electromagnetic coil 24 to generate a magnetic field, and the generated magnetic field is used to generate a magnetic attraction force on the metal ring 25, so that the metal ring 25 drives the fixed rope frame 27 to move in the direction close to the electromagnetic coil 24. During the downward movement of the fixed rope frame 27, the spring 26 is compressed, and the elastic rope 21 is deformed and elongated through the rigid rope 22, so that the position of the laser emitter 6 changes with the elongation of the elastic rope 21, so as to achieve the purpose of forming different rotating curved surface shapes by adjusting the position of the laser emitter 6.

[0029] In this embodiment, each elastic rope 21 is connected to a laser emitter 6, and all the laser emitters 6 are uniformly controlled by an integrated laser controller installed on the base 1. The integrated laser controller adopts known existing technologies. By turning on the switch of the integrated laser controller, all the laser emitters 6 can be turned on to synchronously emit laser beams at a preset angle, thereby forming the required rotating surface.

[0030] In order to make the demonstration effect of the rotational curved surface more intuitive, the present invention is provided with a busbar forming mechanism 3, which allows students to more clearly see the busbar shape presented by the rotational curved surface. The busbar forming mechanism 3 in this embodiment includes a plurality of forming paperboards 31 inserted on the mounting frame 5. Specifically, in combination with 2, Figure 7 It is understood that the molding cardboard 31 is detachably inserted into the installation frame 51 through the slot 52, and the molding cardboard 31 displays the molding busbar shape. The molding cardboard 31 adopts a thermal cardboard. After the laser irradiates the thermal cardboard, a clearly visible laser irradiation point is formed. After the irradiation point is heated, a light spot is formed. The light spot connection line is the molding busbar of the rotation surface. At this time, the thermal cardboard is taken out from the slot 52, and the light spot curve on the thermal cardboard is cut to make the molding busbar of the rotation surface connected to the cutting seam 32 on the thermal cardboard. In this embodiment, the "cross" frame can be used to simultaneously produce the molding busbars of four rotation surfaces.

[0031] In order to deepen students' understanding of the forming busbar of the rotating surface, the present invention provides a busbar verification mechanism 4 to dynamically verify the forming busbar projected onto the forming cardboard 31 by the rotating surface. To this end, a motor 200 is installed below the rope frame 27, and a spring 26 is sleeved on the outside of the motor 200. The spring 26 will not have any effect on the operation of the motor 200. The output shaft of the motor 200 is connected to the central shaft 100, and the motor 200 is used to drive the central shaft 100 to rotate, thereby driving the busbar verification mechanism 4 to cooperate with the forming cardboard 31 to dynamically verify the forming busbar. Specifically, the busbar verification mechanism 4 includes a telescopic cross bar 41 and a verification rod 42. The fixed end of the telescopic cross bar 41 is installed in the middle of the circular plate 12 through a connecting plate 300. The connecting plate 300 is fixedly connected to the top of the circular plate 12. The verification rod 42 is movably connected to the free end of the telescopic cross bar 41. The length of the telescopic cross bar 41 is adjusted with the position of the laser emitter 6. The inclination angle of the verification rod 42 is adjustable. After the telescopic cross bar 41 is adjusted, the verification rod 42 is always close to the nearest laser emitter 6. Before verification, the verification rod 42 is moved to the right side of the telescopic cross bar 41. The rod 42 is adjusted to be consistent with the angle of the light beam emitted by the laser emitter 6. At this time, the verification rod 42 is inserted into the cutting slit 32 of one of the forming cardboards 31. The rotation of the central axis 100 drives the telescopic cross bar 41 and the verification rod 42 to rotate synchronously. At this time, it can be intuitively observed that during the rotation of the telescopic cross bar 41, the verification rod 42 passes through the cutting slit 32 on each thermal cardboard in turn, and the verification rod 42 will not contact or collide with the thermal cardboard, allowing students to intuitively observe and experience the formation principle of the rotating surface and deepen their understanding of the forming generatrix.

[0032] Embodiment 2: The rotating curved surface demonstration teaching aid of the present invention is divided into the following three stages during actual operation: The first stage: setting the generatrix of the rotation surface; The laser beam emitted by the laser emitter 6 generates a light spot on the thermal paperboard to finally form the generatrix of the rotating surface. The demonstration teaching aid of the present invention can display a plurality of rotating surfaces of different sizes according to teaching needs, and also allow students to participate in adjusting the size of the rotating surface, thereby enhancing the interactive participation experience and gaining a deeper understanding of the knowledge points. The adjustment here is completed by the light emission adjustment mechanism 2, as follows: Turn on the variable resistor 9, and adjust the resistance of the variable resistor 9 to control the current of the conductive coil 23. The conductive coil 23 generates electromagnetic induction on the electromagnetic coil 24, and the electromagnetic coil 24 generates a corresponding magnetic field force on the metal ring 25, which attracts the metal ring 25 and the rope fixing frame 27 to move toward the electromagnetic coil 24. At this time, the rope fixing frame 27 pulls the rigid rope 22 to move around the fixed pulley 7, and the rigid rope 22 pulls the elastic rope 21 to stretch it. The laser emitter 6 will change its position as the elastic rope 21 stretches. The laser emitter 6 can be adjusted to the required position to proceed to the next stage of operation. The second stage: generatrix forming of the rotation surface; All laser emitters 6 are turned on at the same time by the integrated laser controller. The laser emitters 6 emit laser beams at a set angle. Then the thermal paperboard is inserted into the mounting frame 51 from the slot 52. The laser beam irradiates the thermal paperboard to form a light spot after the thermal paperboard is heated. Figure 7 , the line connecting the light spots is the generatrix shape of the rotation surface; Phase 3: Verification of the generatrix of the rotational surface; Each thermal paperboard is taken out from the mounting frame 51 and cut along the direction of the light spot line to form a cutting seam 32. Figure 8 , insert the thermal cardboard into the mounting frame 51 again, adjust the length of the telescopic crossbar 41 to match the position of the laser emitter 6, and adjust the angle of the verification rod 42 to be consistent with the light emission angle of the laser emitter 6, refer to Figure 9-10 , and then turn on the motor 200, the motor 200 drives the central shaft 100 to rotate, and the central shaft 100 drives the cross bar and the verification rod 42 to rotate synchronously during the rotation. In this process, it can be intuitively seen that the verification rod 42 passes through the cutting seam 32 on each thermal cardboard in turn, and will not contact or collide with the thermal cardboard, thereby verifying the generatrix shape and forming principle of the rotation surface, so that students can have a deeper grasp of this knowledge point.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotating curved surface demonstration teaching aid, comprising a base support (1), on which a mounting frame (5) is arranged, characterized in that: Also includes: A light emission adjustment mechanism (2) is arranged on the base (1); a laser emitter (6) is arranged on the light emission adjustment mechanism (2); and the position of the laser emitter (6) is adjusted by controlling the light emission adjustment mechanism (2) through a variable resistor (9); A busbar forming mechanism (3) is located above the bottom bracket (1) and is detachably connected to the mounting frame (5), and is used to form a busbar in the form of a rotating curved surface; The busbar verification mechanism (4) is arranged above the bottom bracket (1) and cooperates with the busbar forming mechanism (3) to verify the effect of the formed busbar.

2. The rotating curved surface demonstration teaching aid according to claim 1, characterized in that: The light emission adjustment mechanism (2) comprises a pull rope assembly and an adjustment assembly, the pull rope assembly is connected to the bottom support seat (1) via a rope fixing frame (27), and the adjustment assembly is arranged inside the bottom support seat (1) and below the rope fixing frame (27).

3. The rotating curved surface demonstration teaching aid according to claim 2, characterized in that: The pull rope assembly comprises a plurality of elastic ropes (21) and a plurality of rigid ropes (22), one end of each rigid rope (22) being fixedly connected to a rope fixing frame (27), and the other end of each rigid rope (22) passing around a fixed pulley (7) on a bottom support seat (1) and then connected to the distal end of each corresponding elastic rope (21), and the proximal end of each elastic rope (21) being fixedly connected to the bottom support seat (1).

4. The rotating curved surface demonstration teaching aid according to claim 2, characterized in that: The regulating assembly comprises a conducting coil (23), an electromagnetic coil (24), a metal ring (25) and a spring (26); the conducting coil (23) is installed in a bottom bracket (1) and is electrically connected to a variable resistor (9); the electromagnetic coil (24) is arranged on the top of the conducting coil (23); the metal ring (25) is connected to the bottom of a rope fixing frame (27) above the electromagnetic coil (24); and the spring (26) is installed in the middle of the electromagnetic coil (24) and its two ends are respectively connected to the bottom bracket (1) and the rope fixing frame (27).

5. The rotating curved surface demonstration teaching aid according to claim 1, characterized in that: The busbar forming mechanism (3) comprises a plurality of forming paperboards (31) inserted on the mounting frame (5), and the shaped busbar shape is displayed through the forming paperboards (31).

6. The rotating curved surface demonstration teaching aid according to claim 1, characterized in that: The busbar verification mechanism (4) comprises a telescopic cross bar (41) and a verification rod (42), wherein the fixed end of the telescopic cross bar (41) is connected to the middle of the base bracket (1), the verification rod (42) is connected to the free end of the telescopic cross bar (41), and the verification rod (42) is at the same angle as the laser emitter (6).

7. The rotating curved surface demonstration teaching aid according to claim 6, characterized in that: The verification rod (42) is inserted into the cutting slit (32) of the busbar forming mechanism (3).

8. The method for using the rotating surface demonstration teaching aid is characterized in that: The following steps are involved: Step 1: Turn on the variable resistor (9) and adjust the current in the conductive coil (23), so that the conductive coil (23) generates an induced magnetic field on the electromagnetic coil (24), so that the electromagnetic coil (24) attracts the metal ring (25) to drive the fixed rope frame (27) to move downward. When the fixed rope frame (27) moves downward, the elastic rope (21) is stretched through the rigid rope (22), so that the laser transmitter (6) is adjusted to a desired position; Step 2: Turn on the laser transmitter (6), insert the thermal paperboard into the mounting frame (51), and the laser beam of the laser transmitter (6) forms a light spot on the thermal paperboard, and the connecting line of the light spots shows the generatrix shape of the rotational surface; Step 3: After the thermal paperboard is taken out and a cutting slit (32) is cut along the line connecting the light spots, the thermal paperboard is inserted into the mounting frame (51), the telescopic cross bar (41) and the verification rod (42) are adjusted to match the laser emitter (6), and then the motor (200) is turned on. The motor (200) rotates to drive the central axis (100) and the telescopic cross bar (41) and the verification rod (42) to rotate synchronously. The verification rod (42) sequentially passes through the cutting slit (32) on the thermal paperboard without contact, thereby verifying the generatrix shape and forming principle of the rotational surface.

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