Electrostatic field demonstration teaching aid and method of use

Abstract

The application discloses a static electric field demonstration teaching aid and a use method, which comprise a teaching aid frame, a mounting rod, a simulation mechanism, a display mechanism and an indication mechanism. The simulation mechanism is used for demonstrating a static electric field. The display mechanism is used for forming a reference structure on the teaching aid frame and displaying equipotential lines of the static electric field. The indication mechanism is used for identifying the static electric field intensity. The rotating rod is rotated, the second bevel gear is driven to rotate, the meshing of the second bevel gear and the first bevel gear is utilized, the screw rod is driven to rotate, the two sliding blocks are moved on the sliding rails, the fixed rod and the telescopic rod are moved along with the sliding blocks, the telescopic rod is moved on the fixed rod, the ball drives the elastic cloth to be extruded and deformed, the high points and the low points are created on the elastic cloth, the spatial positions are high and low, the electric potential is high and low, the static electric field is simulated, students are convenient to observe, and the practicability and the safety of teaching are convenient.

Description

Technical Field

[0001] This invention relates to the field of teaching equipment, and in particular to an electrostatic field demonstration teaching aid and its usage method. Background Technology

[0002] The main difficulty high school students encounter when learning electrostatics lies in the fact that the concepts of electric potential and electric field strength, two major properties of electric fields, are too abstract. Furthermore, the electric field itself is invisible and intangible, hindering the understanding of physical concepts. While the People's Education Press high school physics textbook repeatedly emphasizes the analogy between electric and gravitational fields, which helps students understand to some extent, the actual teaching method still relies solely on verbal explanations by teachers. Students cannot establish a connection between the two, limiting the effectiveness of this approach. Therefore, teaching aids are typically used to assist students in observation and understanding.

[0003] Common electrostatic field demonstration aids mostly utilize static electricity or applied voltage. Static electricity poses certain dangers; too little charge makes the phenomenon inconspicuous, while too much charge can lead to improper operation and threaten the experimenter's safety. Furthermore, the humidity in the air causes the charged object to quickly neutralize with free charges in the air, resulting in a rapid decrease in charge. The static phenomenon disappears quickly over time, making the experimental phenomenon difficult to observe. Additionally, common aids lack the ability to mark equipotential lines or demonstrate potential levels, hindering the demonstration of the relationship between electric field strength and potential. These shortcomings result in electrostatic field teaching aids being inflexible, unapplicable, and functionally limited, making it difficult to simulate and demonstrate electrostatic fields, causing difficulties for student observation, and impacting the practicality and safety of teaching. Summary of the Invention

[0004] The purpose of this invention is to provide an electrostatic field demonstration teaching aid and its usage method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electrostatic field demonstration teaching aid, including a teaching aid frame;

[0006] Mounting rod, the two ends of which are fixedly connected to the inner wall of the teaching aid frame;

[0007] It also includes a simulation mechanism, which is disposed in the inner cavity of the teaching aid frame. The simulation mechanism is used to form a demonstration structure in the inner cavity of the teaching aid frame and to demonstrate the electrostatic field.

[0008] The display mechanism is mounted on the teaching aid frame and is used to form a reference structure on the teaching aid frame and display the electrostatic field equipotential lines.

[0009] An indicator mechanism is disposed on a display mechanism, and the indicator mechanism is used to form a display structure on the display mechanism and to indicate the electrostatic field strength.

[0010] Preferably, the simulation mechanism includes:

[0011] Elastic fabric, the edge of which is fixedly connected to the inner wall of the teaching aid frame;

[0012] A sliding track, the two ends of which are fixedly connected to the inner wall of the teaching aid frame;

[0013] A sliding block is slidably inserted into one end of a sliding track, and the sliding block is respectively disposed above and below the elastic fabric.

[0014] Preferably, the simulation mechanism further includes:

[0015] A fixing rod, one end of which is fixedly connected to the outer wall of the sliding block;

[0016] A telescopic rod, one end of which is slidably inserted into the inner cavity of a fixed rod;

[0017] A sphere, the outer wall of which is fixedly connected to the other end of the telescopic rod;

[0018] Bolt 1, one end of which is threaded to one side of the other end of the fixing rod, and one end of which is in contact with the outer wall of the telescopic rod.

[0019] Preferably, the simulation mechanism further includes:

[0020] Mounting block, one end of which is fixedly connected to the front of sliding block;

[0021] A screw, one end of which is threadedly connected to the mounting block, and both ends of which are rotatably interlocked with the two sides of the teaching aid frame;

[0022] The first bevel gear is fixedly inserted and connected to one end of the screw;

[0023] The second bevel gear is disposed on one side of the first bevel gear and meshes with the first bevel gear;

[0024] A rotating rod, one end of which is fixedly inserted and connected to a second bevel gear.

[0025] Preferably, the display mechanism includes:

[0026] A laser module, wherein the laser module is arranged in a rectangular array above and below the elastic fabric;

[0027] The mounting ring is slidably inserted into the mounting rod, and the outer wall of the mounting ring is fixedly connected to the laser module.

[0028] A movable groove is provided on the mounting rod;

[0029] The movable block is slidably inserted into the inner cavity of the movable groove, and the outer wall of the movable block is fixedly connected to the inner wall of the mounting ring.

[0030] Connecting rod one, one end of which is fixedly connected to the outer wall of the movable block.

[0031] Preferably, the display mechanism further includes:

[0032] Connecting rod two, one end of which is fixedly connected to the outer wall of the laser module and the mounting ring respectively;

[0033] A connecting shaft, one end of which is fixedly connected to the outer wall of the movable block;

[0034] A movable rod is provided on the front and back of the teaching aid frame, and one end of the movable rod is rotatably connected to the other end of the connecting shaft;

[0035] A fixed shaft is fixedly inserted and connected to the other end of the movable rod.

[0036] Preferably, the display mechanism further includes:

[0037] A sliding rod is provided on the front and back of the teaching aid frame;

[0038] A movable block, which is slidably interlocked with a sliding rod;

[0039] A connecting block, one end of which is fixedly connected to the outer wall of the movable block, and the connecting block is rotatably inserted into one end of the fixed shaft;

[0040] Bolt 2 is threadedly connected to the front of the movable block, and one end of bolt 2 is in contact with the outer wall of the sliding rod.

[0041] Preferably, the indicating mechanism includes:

[0042] Mounting base, wherein the lower surface of the mounting base is in contact with the middle part of the upper surface of the elastic cloth;

[0043] A rotating shaft, the bottom of which is rotatably connected to the middle of the upper surface of the mounting base;

[0044] Pointer 1, the middle part of the lower surface of the pointer is fixedly connected to the top end of the rotating shaft;

[0045] A counterweight is fixedly connected to the lower surface of the pointer.

[0046] Preferably, the indicating mechanism further includes:

[0047] A positioning rod, the middle part of which is fixedly connected to the top of the rotating shaft;

[0048] Pointer 2, wherein pointer 2 is slidably inserted into one end of the positioning rod;

[0049] A tension spring is movably connected to one end of a positioning rod, and one end of the tension spring is fixedly connected to one end of a pointer.

[0050] This invention also provides a method for using an electrostatic field demonstration teaching aid, including the following specific steps:

[0051] Step 1: First, by rotating the rotating rod, the second bevel gear is driven to rotate as well. The meshing of the second bevel gear and the first bevel gear drives the screw to rotate, causing the two mounting blocks to move in opposite directions on the screw. This causes the two sliding blocks to move on the sliding track. The fixed rod and the telescopic rod move together with the sliding blocks, and the telescopic rod moves on the fixed rod, causing the ball to compress and deform the elastic cloth, creating high and low points on the elastic cloth. The spatial position is high or low, which corresponds to the electric potential at the corresponding position, thus simulating the electrostatic field.

[0052] Step 2: Next, by sliding the moving block on the sliding rod, one end of the movable rod moves and rotates together. The other end of the movable rod drives the connecting shaft and the movable block to move vertically along the inner cavity of the movable groove. Using connecting rod one and connecting rod two, multiple laser modules and mounting rings slide along the mounting rod to adjust the position of the laser modules. By using multiple laser modules in different directions to irradiate a certain height, lines connecting positions at the same height can be displayed on the elastic cloth, representing lines connecting positions with the same potential in the electric field.

[0053] Step 3: Then, place pointer one on a point on the elastic cloth. The mounting base should be attached to the surface of the elastic cloth and aligned with the tangential direction of that point. Due to the effect of the counterweight, the direction of the fastest drop in height, i.e. the direction of the fastest drop in electric potential, will be indicated, indicating the direction of the electric field strength. By using multiple pointers, the direction of the electric field lines can be roughly seen. Furthermore, by placing pointer two on the elastic cloth, the magnitude of the electric field strength at that point can be indicated by the elongation of the tension spring.

[0054] The technical effects and advantages of this invention are as follows:

[0055] (1) This invention utilizes an elastic cloth, a rotating rod, a first bevel gear, a second bevel gear, a screw, a sliding block, a sliding track, a fixed rod, a telescopic rod, and a sphere in a coordinated manner. By rotating the rotating rod, the second bevel gear is driven to rotate together. The meshing action of the second bevel gear and the first bevel gear drives the screw to rotate, causing the two mounting blocks to move in opposite directions on the screw, which in turn drives the two sliding blocks to move on the sliding track. The fixed rod and the telescopic rod move together with the sliding blocks, and the telescopic rod moves on the fixed rod, causing the sphere to compress and deform the elastic cloth, creating high and low points on the elastic cloth. The spatial position height corresponds to the electric potential at the corresponding position, which is convenient for simulating the electrostatic field, making it convenient for students to observe, and improving the practicality and safety of teaching.

[0056] (2) This invention utilizes a combination of movable blocks, movable rods, movable blocks, mounting rings, elastic cloth, and laser modules. By sliding the movable block on the sliding rod, one end of the movable rod moves and rotates together. The movable block at the other end of the movable rod moves vertically, causing multiple laser modules and mounting rings to slide along the mounting rod, thus adjusting the position of the laser modules. Multiple laser modules in different directions are used to irradiate a certain height together, and lines connecting positions at the same height can be displayed on the elastic cloth, representing lines connecting positions with the same electric potential in the electric field, which makes it easier for students to observe the characteristics and physical meaning of equipotential lines.

[0057] (3) This invention utilizes a combination of elastic cloth, pointer one, counterweight, pointer two, and tension spring. Pointer one is placed on a point on the elastic cloth, and the mounting base is attached to the surface of the elastic cloth, with the same tangential direction as the point. Due to the effect of the counterweight, the direction of the fastest drop in height is indicated, which is the direction of the fastest drop in electric potential, indicating the direction of the electric field strength. Using multiple pointers one, the direction of the electric field lines can be roughly seen. Furthermore, by placing pointer two on the elastic cloth, the magnitude of the electric field strength at that point can be indicated by the elongation of the tension spring, thus improving the effectiveness and quality of teaching. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0059] Figure 2 This is a schematic diagram of the structure of the sliding block in this invention.

[0060] Figure 3 This is a front cross-sectional view of the fixing rod of the present invention.

[0061] Figure 4 This is a front cross-sectional view of the first bevel gear of the present invention.

[0062] Figure 5 For the present invention Figure 1 A magnified structural diagram at point A.

[0063] Figure 6 For the present invention Figure 1 A magnified structural diagram at point B.

[0064] Figure 7 This is a schematic diagram of the structure of one of the pointers in this invention.

[0065] Figure 8 This is a schematic diagram of the structure of the pointer in this invention.

[0066] In the diagram: 1. Teaching aid frame; 2. Mounting rod; 3. Simulation mechanism; 31. Elastic cloth; 32. Sliding track; 33. Sliding block; 34. Fixed rod; 35. Telescopic rod; 36. Ball; 37. Bolt 1; 38. Mounting block; 39. Screw; 310. First bevel gear; 311. Second bevel gear; 312. Rotating rod; 4. Display mechanism; 41. Laser module; 42. Mounting ring; 43. Movable groove; 44. Movable block; 45. Connecting rod 1; 46. Connecting rod 2; 47. Connecting shaft; 48. Movable rod; 49. Fixed shaft; 410. Sliding rod; 411. Moving block; 412. Connecting block; 413. Bolt 2; 5. Indicating mechanism; 51. Mounting base; 52. Rotating shaft; 53. Pointer 1; 54. Counterweight; 55. Positioning rod; 56. Pointer 2; 57. Tension spring. Detailed Implementation

[0067] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] This invention provides, for example Figure 1-8The electrostatic field demonstration teaching aid shown includes a teaching aid frame 1, mounting rods 2, a simulation mechanism 3, a display mechanism 4, and an indicator mechanism 5. The teaching aid frame 1 serves to fix and support the device. The two ends of the mounting rods 2 are fixedly connected to the inner wall of the teaching aid frame 1. Multiple mounting rods 2 are fixed on the teaching aid frame 1 in a rectangular array. The simulation mechanism 3 is set in the inner cavity of the teaching aid frame 1. The simulation mechanism 3 is used to form a demonstration structure in the inner cavity of the teaching aid frame 1 and to demonstrate the electrostatic field. The display mechanism 4 is set on the teaching aid frame 1. The display mechanism 4 is used to form a reference structure on the teaching aid frame 1 and to display the equipotential lines of the electrostatic field. The display mechanism 4 facilitates the observation of the equipotential lines of the electrostatic field. The indicator mechanism 5 is set on the display mechanism 4. The indicator mechanism 5 is used to form a display structure on the display mechanism 4 and to mark the intensity of the electrostatic field. The indicator mechanism 5 marks the intensity and direction of the electrostatic field.

[0069] Specifically, the simulation mechanism 3 includes an elastic cloth 31, a sliding track 32, a sliding block 33, a fixed rod 34, a telescopic rod 35, a sphere 36, a bolt 37, a mounting block 38, a screw 39, a first bevel gear 310, a second bevel gear 311, and a rotating rod 312. The edge of the elastic cloth 31 is fixedly connected to the inner wall of the teaching aid frame 1. The elastic cloth 31 has good elastic deformation capability and is used to simulate an electrostatic field. Coordinate axes can be drawn on the cloth as needed, which is beneficial for students to observe the characteristics. The two ends of the sliding track 32 are fixedly connected to the inner wall of the teaching aid frame 1. The two sliding tracks 32 are respectively set at the top and bottom of the inner cavity of the teaching aid frame 1 for installing the sliding block 33. The sliding block 33 is slidably inserted and connected to one end of the sliding track 32. The sliding blocks 33 are positioned above and below the elastic fabric 31. They are used to mount the fixed rod 34 and the telescopic rod 35. The sliding blocks 33 move horizontally on the sliding track 32. Multiple sliding blocks 33 are arranged symmetrically at the center. One end of the fixed rod 34 is fixedly connected to the outer wall of the sliding block 33. The fixed rod 34 moves with the sliding block 33 and is used to mount the telescopic rod 35. One end of the telescopic rod 35 is slidably inserted into the inner cavity of the fixed rod 34. The telescopic rod 35 slides within the inner cavity of the fixed rod 34, adjusting the height of the telescopic rod 35 and the ball 36. The outer wall of the ball 36 is fixedly connected to the other end of the telescopic rod 35. The telescopic rod 35 drives the ball 36 to move vertically, compressing and deforming the elastic fabric 31. One end of the bolt 37 is connected to the fixed rod... One end of bolt 37 is threaded to the other end of the telescopic rod 35. One end of bolt 37 fits against the outer wall of the telescopic rod 35. Tightening bolt 37 by rotating it compresses and fixes the telescopic rod 35, ensuring the stability of the telescopic rod 35 and the ball 36. One end of mounting block 38 is fixedly connected to the front of sliding block 33. Mounting block 38 is used to move sliding block 33. One end of screw 39 is threaded to mounting block 38. Both ends of screw 39 are rotatably interlocked with the two sides of the teaching aid frame 1. Reverse threads are provided at both ends of screw 39. Rotating screw 39 causes the two mounting blocks 38 to move in opposite directions horizontally, adjusting the position of sliding block 33 and telescopic rod 35. The first bevel gear 310 is fixedly interlocked with one end of screw 39. The connection is as follows: a first bevel gear 310 drives the screw 39 to rotate; a second bevel gear 311 is disposed on one side of the first bevel gear 310 and meshes with it; the meshing of the second bevel gear 311 and the first bevel gear 310 drives both the first bevel gear 310 and the screw 39 to rotate; one end of a rotating rod 312 is fixedly inserted into the second bevel gear 311; the two second bevel gears 311 are respectively disposed at the top and bottom of the rotating rod 312, causing both second bevel gears 311 to rotate together; by rotating the rotating rod 312, the second bevel gears 311 rotate together; and by meshing the second bevel gears 311 and the first bevel gear 310, the screw 39 rotates.This causes the two mounting blocks 38 to move in opposite directions on the screw 39, which in turn moves the two sliding blocks 33 on the sliding track 32. The fixed rod 34 and the telescopic rod 35 move together with the sliding blocks 33, and the telescopic rod 35 moves on the fixed rod 34, causing the ball 36 to compress and deform the elastic cloth 31, creating high and low points on the elastic cloth 31. The spatial height difference corresponds to the electric potential difference at that point, thus simulating the electrostatic field.

[0070] Furthermore, the display mechanism 4 includes a laser module 41, a mounting ring 42, a movable groove 43, a movable block 44, a first connecting rod 45, a second connecting rod 46, a connecting shaft 47, a movable rod 48, a fixed shaft 49, a sliding rod 410, a moving block 411, a connecting block 412, and a second bolt 413. The laser module 41 is arranged in a rectangular array above and below the elastic cloth 31. The laser module 41 is a red laser and is electrically connected to an external power supply through an external switch to mark the potential position of the electrostatic field. The mounting ring 42 is slidably inserted into the mounting rod 2, and the outer wall of the mounting ring 42 is fixedly connected to the laser module 41. The laser module 41 is slidably inserted into the mounting rod 2 through the mounting ring 42. The movable groove 43 is provided on the front and back mounting rods. 2. The movable slot 43 is used to install the movable block 44. The movable block 44 is slidably inserted into the inner cavity of the movable slot 43. The outer wall of the movable block 44 is fixedly connected to the inner wall of the mounting ring 42. The movable block 44 is used to drive the mounting ring 42 and the laser module 41 to slide on the mounting rod 2. One end of the connecting rod 45 is fixedly connected to the outer wall of the movable block 44. The connecting rod 45 is used to drive the two movable blocks 44 to move together. One end of the connecting rod 46 is fixedly connected to the outer wall of the laser module 41 and the mounting ring 42 respectively. Multiple laser modules 41 are connected through multiple connecting rods 46, so that multiple laser modules 41 can move together. One end of the connecting shaft 47 is fixedly connected to the outer wall of the movable block 44. The movable rod 48 is set on the front and back of the teaching aid frame 1. One end of the movable rod 48 is rotatably connected to the other end of the connecting shaft 47. One end of the movable rod 48 is rotatably connected to the movable block 44 via the connecting shaft 47. The fixed shaft 49 is fixedly connected to the other end of the movable rod 48. The other end of the movable rod 48 rotates around the fixed shaft 49. The sliding rod 410 is located on the front and back of the teaching aid frame 1. Both ends of the sliding rod 410 are fixedly connected to the front and back of the teaching aid frame 1. The moving block 411 is slidably connected to the sliding rod 410. The moving block 411 is used to move the other end of the movable rod 48 together. The two movable rods 48 are arranged in a V-shape. One end of the connecting block 412 is fixedly connected to the outer wall of the moving block 411. The connecting block 412 is rotatably connected to one end of the fixed shaft 49. The other end of the movable rod 48 is rotatably connected to the movable block 411 via the fixed shaft 49 and the connecting block 412. The movable block 411 moves on the sliding rod 410, causing the other ends of the two movable rods 48 to move and rotate together. Bolt 413 is threaded to the front of the movable block 411, with one end of bolt 413 fitting against the outer wall of the sliding rod 410. Bolt 413 moves with the movable block 411. Tightening bolt 413 by rotating it causes one end of bolt 413 to press against the outer wall of the sliding rod 410, thus pressing and fixing the movable block 411 and ensuring the stability of the movable rods 48 and the laser module 41. Sliding the movable block 411 on the sliding rod 410 causes one end of the movable rod 48 to move and rotate together.The other end of the movable rod 48, the movable block 44, moves vertically, causing multiple laser modules 41 and the mounting ring 42 to slide along the mounting rod 2. This adjusts the position of the laser modules 41, allowing multiple laser modules 41 in different directions to simultaneously irradiate a certain height. Lines connecting these points at the same height can then be displayed on the elastic cloth 31, representing lines connecting points with the same potential in the electric field.

[0071] The indicating mechanism 5 includes a mounting base 51, a rotating shaft 52, a pointer 1 53, a counterweight 54, a positioning rod 55, a pointer 2 56, and a tension spring 57. The lower surface of the mounting base 51 is in contact with the middle of the upper surface of the elastic cloth 31. The mounting base 51 is used to connect the rotating shaft 52. The bottom of the rotating shaft 52 is rotatably connected to the middle of the upper surface of the mounting base 51. The pointer 1 53 and the positioning rod 55 are rotatably connected to the mounting base 51 via the rotating shaft 52, so that the pointer 1 53 and the pointer 2 56 rotate around the rotating shaft 52. The middle of the lower surface of the pointer 1 53 is fixedly connected to the top of the rotating shaft 52. The pointer 1 53 and the pointer 2 56 are two sets of mechanisms, used to indicate the direction and intensity of the electrostatic field, respectively. The counterweight 54 is fixedly connected to the lower surface of one end of the pointer 1 53. Using the gravity of the counterweight 54, one end of the pointer 1 53 rotates until it is vertically downward. The middle of the positioning rod 55 is connected to the top of the rotating shaft 52. The positioning rod 55 is used to install the pointer 56 and the tension spring 57. The pointer 56 is slidably inserted into one end of the positioning rod 55, and the tension spring 57 is movably sleeved with one end of the positioning rod 55. One end of the tension spring 57 is fixedly connected to one end of the pointer 56, and the other end of the tension spring 57 is fixedly connected to the outer wall of the rotating shaft 52. When the pointer 56 rotates to the vertically downward position, the pointer 56 stretches the tension spring 57. The pointer 53 is placed at a point on the elastic cloth 31, and the mounting base 51 is attached to the surface of the elastic cloth 31, with the same tangential direction as the point. Due to the action of the counterweight 54, the direction of the fastest drop in height is indicated, which is the direction of the fastest drop in electric potential, indicating the direction of the electric field strength at that point. Using multiple pointers 53, the direction of the electric field lines can be roughly seen. Furthermore, by placing the pointer 56 on the elastic cloth 31, the magnitude of the electric field strength at that point can be indicated by the elongation of the tension spring 57.

[0072] How to use this invention:

[0073] First, by rotating the rotating rod 312, the second bevel gear 311 is driven to rotate as well. Utilizing the meshing action of the second bevel gear 311 and the first bevel gear 310, the screw 39 is driven to rotate, causing the two mounting blocks 38 to move in opposite directions on the screw 39. This drives the two sliding blocks 33 to move on the sliding track 32. The fixed rod 34 and the telescopic rod 35 move together with the sliding blocks 33, and the telescopic rod 35 moves on the fixed rod 34, causing the ball 36 to compress and deform the elastic cloth 31, creating high and low points on the elastic cloth 31. The spatial position varies, corresponding to the electric potential at that location, thus simulating the electrostatic field.

[0074] Next, by sliding the moving block 411 on the sliding rod 410, one end of the movable rod 48 is moved and rotated together. The other end of the movable rod 48 drives the connecting shaft 47 and the movable block 44 to move vertically along the inner cavity of the movable groove 43. The connecting rod 1 45 and the connecting rod 2 46 drive multiple laser modules 41 and the mounting ring 42 to slide along the mounting rod 2 to adjust the position of the laser module 41. Multiple laser modules 41 in different directions are used to irradiate a certain height. Lines connecting the positions with the same height can be displayed on the elastic cloth 31, which represent the lines connecting the positions with the same potential in the electric field.

[0075] Then, by placing pointer 53 at a certain point on the elastic cloth 31, the mounting base 51 is attached to the surface of the elastic cloth 31, and the tangential direction of the point is the same. Due to the action of the counterweight 54, the direction of the fastest drop in height is indicated, that is, the direction of the fastest drop in electric potential, indicating the direction of the electric field strength. By using multiple pointers 53, the direction of the electric field lines can be roughly seen. Furthermore, by placing pointer 56 on the elastic cloth 31, the magnitude of the electric field strength at that point can be indicated by the elongation of the tension spring 57.

[0076] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrostatic field demonstration teaching aid, comprising: Teaching aids frame (1); Mounting rod (2), the two ends of which are fixedly connected to the inner wall of the teaching aid frame (1); The feature is that it further includes a simulation mechanism (3), which is disposed in the inner cavity of the teaching aid frame (1). The simulation mechanism (3) is used to form a demonstration structure in the inner cavity of the teaching aid frame (1) and to demonstrate the electrostatic field. Display mechanism (4), which is disposed on the teaching aid frame (1), is used to form a reference structure on the teaching aid frame (1) and display the electrostatic field equipotential lines; The display mechanism (4) includes a movable slot (43), which is disposed on the mounting rod (2); Movable block (44), which is slidably inserted into the inner cavity of the movable groove (43); Connecting rod 1 (45), one end of which is fixedly connected to the outer wall of the movable block (44); Connecting rod two (46), one end of which is fixedly connected to the outer wall of the laser module (41) and the mounting ring (42); A connecting shaft (47) is provided, one end of which is fixedly connected to the outer wall of the movable block (44); Movable rod (48), the movable rod (48) is set on the front and back of the teaching aid frame (1), and one end of the movable rod (48) is rotatably inserted and connected to the other end of the connecting shaft (47); A fixed shaft (49) is fixedly inserted and connected to the other end of the movable rod (48); A sliding rod (410) is provided on the front and back of the teaching aid frame (1); A movable block (411) is slidably interlocked with a sliding rod (410); Indicator (5), which is disposed on display mechanism (4), is used to form a display structure on display mechanism (4) and to mark the electrostatic field strength.

2. The electrostatic field demonstration teaching aid according to claim 1, characterized in that, The simulation mechanism (3) includes: Elastic fabric (31), the edge of which is fixedly connected to the inner wall of the teaching aid frame (1); The sliding track (32) is fixedly connected at both ends to the inner wall of the teaching aid frame (1); The sliding block (33) is slidably inserted into one end of the sliding track (32), and the sliding block (33) is respectively disposed above and below the elastic cloth (31).

3. The electrostatic field demonstration teaching aid according to claim 2, characterized in that, The simulation mechanism (3) also includes: A fixing rod (34) is fixedly connected at one end to the outer wall of the sliding block (33); Telescopic rod (35), one end of which is slidably inserted into the inner cavity of fixed rod (34); A sphere (36), the outer wall of which is fixedly connected to the other end of the telescopic rod (35); Bolt 1 (37), one end of which is threaded to one side of the other end of the fixing rod (34), and one end of which is in contact with the outer wall of the telescopic rod (35).

4. The electrostatic field demonstration teaching aid according to claim 3, characterized in that, The simulation mechanism (3) also includes: Mounting block (38), one end of which is fixedly connected to the front of sliding block (33); Screw (39), one end of which is threaded to mounting block (38), and both ends of which are rotatably interlocked with the two sides of teaching aid frame (1); The first bevel gear (310) is fixedly inserted and connected to one end of the screw (39); The second bevel gear (311) is disposed on one side of the first bevel gear (310), and the second bevel gear (311) meshes with the first bevel gear (310); A rotating rod (312) is fixedly inserted and connected at one end to a second bevel gear (311).

5. The electrostatic field demonstration teaching aid according to claim 4, characterized in that, The display mechanism (4) includes: Laser module (41), the laser module (41) is arranged in a rectangular array above and below the elastic cloth (31); Mounting ring (42) is slidably inserted into mounting rod (2). The outer wall of mounting ring (42) is fixedly connected to laser module (41). The outer wall of movable block (44) is fixedly connected to inner wall of mounting ring (42).

6. The electrostatic field demonstration teaching aid according to claim 5, characterized in that, The display mechanism (4) further includes: A connecting block (412) is fixedly connected at one end to the outer wall of the moving block (411), and the connecting block (412) is rotatably inserted into one end of the fixed shaft (49). Bolt 2 (413) is threaded to the front of the moving block (411), and one end of the bolt 2 (413) is in contact with the outer wall of the sliding rod (410).

7. The electrostatic field demonstration teaching aid according to claim 6, characterized in that, The indicating mechanism (5) includes: Mounting base (51), the lower surface of which is in contact with the middle part of the upper surface of elastic cloth (31); Rotating shaft (52), the bottom of which is rotatably connected to the middle of the upper surface of the mounting base (51); Pointer 1 (53), the middle part of the lower surface of the pointer 1 (53) is fixedly connected to the top end of the rotating shaft (52); The counterweight (54) is fixedly connected to the lower surface of one end of the pointer (53).

8. The electrostatic field demonstration teaching aid according to claim 7, characterized in that, The indicating mechanism (5) also includes: Positioning rod (55), the middle part of which is fixedly connected to the top of the rotating shaft (52); Pointer 2 (56), which is slidably inserted into one end of the positioning rod (55); A tension spring (57) is movably connected to one end of a positioning rod (55), and one end of the tension spring (57) is fixedly connected to one end of a pointer (56).

9. A method of using an electrostatic field demonstration teaching aid, characterized in that, The specific usage steps are as follows: Step 1: First, by rotating the rotating rod (312), the second bevel gear (311) is driven to rotate together. The meshing action of the second bevel gear (311) and the first bevel gear (310) drives the screw (39) to rotate, so that the two mounting blocks (38) move in opposite directions on the screw (39), driving the two sliding blocks (33) to move on the sliding track (32). The fixed rod (34) and the telescopic rod (35) move together with the sliding blocks (33), and the telescopic rod (35) moves on the fixed rod (34), driving the ball (36) to compress and deform the elastic cloth (31), creating high and low points on the elastic cloth (31). The spatial position is high or low, corresponding to the electric potential at the corresponding position, to simulate the electrostatic field. Step 2: Next, by sliding the moving block (411) on the sliding rod (410), one end of the movable rod (48) is moved and rotated together. The other end of the movable rod (48) drives the connecting shaft (47) and the movable block (44) to move vertically along the inner cavity of the movable groove (43). The connecting rod one (45) and the connecting rod two (46) drive multiple laser modules (41) and the mounting ring (42) to slide along the mounting rod (2) to adjust the position of the laser module (41). Multiple laser modules (41) in different directions are used to irradiate a certain height. Lines connecting the same height can be displayed on the elastic cloth (31), which represent the lines connecting the same potential in the electric field. Step 3: Then, place pointer one (53) on a point on the elastic cloth (31), and mount (51) is attached to the surface of the elastic cloth (31) in the same direction as the tangential plane at that point. Due to the action of the counterweight (54), the direction of the fastest drop in height is indicated, which is the direction of the fastest drop in electric potential, indicating the direction of the electric field strength. By using multiple pointers one (53), the direction of the electric field lines can be roughly seen. Furthermore, by placing pointer two (56) on the elastic cloth (31), the magnitude of the electric field strength at that point can be indicated by the elongation of the tension spring (57).

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