Physical electromagnetism test teaching aid

Abstract

The utility model discloses a physical electromagnetism test teaching aid, which relates to the technical field of teaching aids and comprises a bottom plate, a first rotating column rotatably connected to the upper end face of the bottom plate, a first cylinder rotatably connected to the upper end face of the first rotating column, and a plurality of round holes arranged on the first cylinder. A second rotating column is rotationally connected to the upper end face of the bottom plate and located on one side of the first rotating column, and a second barrel is arranged on the second rotating column. A first shell is arranged on the upper end face of the bottom plate, and a plurality of round magnets are arranged in the first shell. According to the device, the round magnets are arranged in the round holes, the first barrel body is rotated, the movement process of the second barrel body is observed, and then the operation is repeated, so that it can be found that the movement of the second barrel body is stable along with adding of the round magnets; however, along with the continuous increase of the circular magnets, the movement of the cylinder II becomes unstable, so that students can more intuitively feel the influence of the number of the magnets on the rotation of the cylinder II, and the understanding of the relationship between the magnetic force and the object movement is deepened.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to a physical electromagnetism experimental teaching aid. Background Art

[0002] Physics is a discipline that studies the general laws of matter movement and the basic structure of matter. As a basic discipline of natural science, physics studies the most basic forms and laws of motion of all matter, from the universe to elementary particles, and thus becomes the research foundation of other natural science disciplines. Its theoretical structure fully utilizes mathematics as its working language and uses experiments as the only criterion for testing the correctness of theories. It is the most precise natural science discipline today.

[0003] Teaching aids are models, real objects, specimens, instruments, charts, slides, etc. used to explain something, including teaching equipment, teaching instruments, training equipment, educational equipment, experimental equipment, teaching specimens, teaching models, etc.

[0004] Teaching aids, as tools used by teachers to assist teaching, play a role that cannot be replaced by other means. They enable students to have a more intuitive and vivid understanding of the teaching content, can mobilize students' enthusiasm for learning, improve students' interest in learning, enrich students' perceptual cognition, help students form clear concepts, and at the same time cultivate students' observation and abstract thinking abilities.

[0005] In junior high school physics teaching, the rational use of teaching aids is an important way to improve teaching quality. Put students in the main position, grasp the process and inducement of students' thinking inspiration, create a broad thinking space and intellectual background, provide students with as many demonstration, operation and experimental opportunities as possible, cultivate students' multi-directional thinking and reverse thinking ability, and enable students' thinking ability and creativity to be greatly developed.

[0006] In the process of junior high school physics teaching, the teaching of electromagnetism is generally introduced through text and illustrations in textbooks. Students have limited understanding of the working principles of electromagnetic drive, and there is a lack of teaching aids to improve students' cognitive ability of such knowledge.

[0007] In summary, the present invention provides a physical electromagnetism experimental teaching aid. Utility Model Content

[0008] The purpose of the utility model is to provide a physical electromagnetism experiment teaching aid to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a physical electromagnetic experiment teaching aid, comprising a bottom plate, the upper end surface of the bottom plate is rotatably connected to a rotating column 1, the upper end surface of the rotating column 1 is rotatably connected to a cylinder 1, a plurality of circular holes are opened on the cylinder 1, the upper end surface of the bottom plate and located on one side of the rotating column 1 is rotatably connected to a rotating column 2, and the rotating column 2 is provided with a cylinder 2;

[0010] A shell 1 is arranged on the upper surface of the bottom plate, and a plurality of circular magnets are arranged in the shell 1, and the diameter of the circular magnets is smaller than the diameter of the circular hole.

[0011] As a technical solution of the present invention, a spring is arranged on the inner wall of the circular hole, and one end of the spring is fixedly connected to a keypad.

[0012] As a technical solution of the present invention, a plurality of arc-shaped grooves are provided in the circular hole, and the diameter of the arc-shaped grooves is larger than the diameter of the circular magnet.

[0013] As a technical solution of the present invention, the upper end surface of the bottom plate is fixedly connected with a shell body 2, a cover body is arranged inside the shell body 2, and the diameter of the cover body is greater than the diameter of the cylinder body 2.

[0014] As a technical solution of the present invention, the second cylinder is made of ferromagnetic material, such as aluminum or copper, and the first cylinder is made of polyethylene, so that the first cylinder and the second cylinder will not affect the experiment. At the same time, by way of example, the second cylinder can be a can.

[0015] As a technical solution of the present invention, an upper end surface of the cylinder is rotatably connected to a handle.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model records a physical electromagnetic experiment teaching aid:

[0018] 1. The utility model pushes the circular magnet to move into the circular hole, so that the circular magnet pushes the keyboard and compresses the spring so that the circular magnet is located in the arc groove, thereby preventing the circular magnet from falling when the cylinder body 1 is subsequently rotated, thereby interfering with the experimental process. When the circular magnets are placed in the circular holes one by one, the handle is turned, and the handle drives the cylinder body 1 to rotate at any time. As the cylinder body 1 rotates, the cylinder body 2 starts to rotate due to the action of the circular magnet, so that students can observe that the cylinder body 2 rotates under the action of the circular magnet, so that students can have a deeper understanding of the driving effect of the circular magnet.

[0019] 2. The utility model places circular magnets in the circular holes, then places circular magnets in the circular holes again, rotates the cylinder one again, observes the movement of the cylinder two, then repeats the above operation, and records the movement of the cylinder two. It can be found through experiments that at the beginning, with the addition of circular magnets, the movement of the cylinder two is more stable; but with the continuous increase of circular magnets, the movement of the cylinder two becomes unstable, so that students can more intuitively feel the influence of the number of magnets on the rotation of the cylinder two, and deepen their understanding of the relationship between magnetic force and object movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of the utility model from a top view;

[0022] Figure 3 It is a structural schematic diagram of a cylinder of the utility model.

[0023] In the figure: 1, bottom plate; 2, rotating column 1; 3, cylinder 1; 30, round hole; 300, spring; 301, keypad; 302, arc groove; 4, rotating column 2; 5, cylinder 2; 6, shell 1; 7, circular magnet; 8, shell 2; 9, cover; 10, handle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-3 A physical electromagnetic experiment teaching aid, comprising a bottom plate 1, a rotating column 2 is rotatably connected to the upper end surface of the bottom plate 1, a cylinder 3 is rotatably connected to the upper end surface of the rotating column 2, a plurality of circular holes 30 are provided on the cylinder 3, a rotating column 2 4 is rotatably connected to the upper end surface of the bottom plate 1 and located on one side of the rotating column 2, and a cylinder 2 5 is arranged on the rotating column 4;

[0026] A shell 6 is disposed on the upper end surface of the bottom plate 1 , and a plurality of circular magnets 7 are disposed inside the shell 6 , and the diameter of the circular magnets 7 is smaller than the diameter of the circular hole 30 .

[0027] Example 1

[0028] See also Figure 1-3In this embodiment, in order to make students better understand the driving force of the magnet, the circular magnet 7 is first placed in the circular hole 30. Specifically, the teacher places the circular magnet 7 in the circular hole 30, and then pushes the circular magnet 7 to move into the circular hole 30, so that the circular magnet 7 pushes the keyboard 301 and compresses the spring 300, so that the circular magnet 7 is located in the arc groove 302, to avoid the circular magnet 7 falling off during the subsequent rotation of the cylinder 3, which interferes with the experimental process.

[0029] When the circular magnets 7 are placed in the circular holes 30 in sequence, and then the handle 10 is turned, the handle 10 can drive the cylinder 1 3 to rotate at any time. As the cylinder 1 3 rotates, and due to the action of the circular magnet 7, the cylinder 2 5 starts to rotate, so that students can observe that the cylinder 2 5 rotates under the action of the circular magnet 7, so that students can have a deeper understanding of the driving effect of the circular magnet 7.

[0030] In order to prevent the wind in the external environment from interfering with the experiment, the teacher takes the cover 9 and places it on one of the cylinders 2 5 so that the cylinder 2 5 is located inside the cover 9, and then continues to rotate the cylinder 1 3. At this time, both cylinders 2 5 rotate.

[0031] It should be noted that the cover body 9 is transparent and made of polyethylene, which makes it easier for students to observe the experiment.

[0032] Example 2

[0033] See also Figure 1-3 , further improvement made on the basis of Example 1: because the different placement positions of the circular magnet 7 will have a certain impact on the movement of the cylinder 5, and the circular holes 30 are distributed in an array with the center of the upper end surface of the cylinder 5 as the center of the circle, the position of the circular magnet 7 can be changed to enable students to have a deeper understanding of the driving force of the circular magnet 7.

[0034] First, the circular magnets 7 are evenly placed around the cylinder 1 5, and the cylinder 2 5 starts to move smoothly, so that the magnetic force of the circular magnets 7 on the surface acts evenly around the cylinder 1 3, making the cylinder 2 5 move more stably; then the circular magnets 7 are only placed on the cylinder 1 3, and it can be observed that the movement of the cylinder 2 5 is not very stable at this time. Since the cylinder 2 5 is subjected to the unbalanced magnetic force, the movement direction of the cylinder 2 5 is biased toward one side of the circular magnet 7.

[0035] Example 3

[0036] See also Figure 1-3, further improvements made on the basis of embodiments 1 and 2: because the number of circular magnets 7 will have a certain influence on the rotation of the cylinder 5, that is, more circular magnets 7 can provide stronger magnetic force, thereby making it easier to drive the can to rotate, but too many magnets may also cause the magnetic field to be too strong, affecting the stability of the rotation.

[0037] First, circular magnets 7 are placed in the circular holes 30, and then circular magnets 7 are placed in the circular holes 30 again, and the cylinder 1 3 is rotated again to observe the movement of the cylinder 2 5, and then the above operation is repeated, and the movement of the cylinder 2 5 is recorded. It can be found through experiments that at the beginning, with the addition of circular magnets 7, the movement of the cylinder 2 5 is more stable; but with the continuous increase of circular magnets 7, the movement of the cylinder 2 5 becomes unstable, so that students can more intuitively feel the influence of the number of magnets on the rotation of the cylinder 2 5 and deepen their understanding of the relationship between magnetic force and object movement.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A physical electromagnetism experiment teaching aid, comprising a base plate (1), characterized in that: The upper end surface of the bottom plate (1) is rotatably connected to a rotating column (2), the upper end surface of the rotating column (2) is rotatably connected to a cylinder (3), a plurality of circular holes (30) are provided on the cylinder (3), the upper end surface of the bottom plate (1) and located on one side of the rotating column (2) is rotatably connected to a rotating column (4), a cylinder (5) is provided on the rotating column (4); the upper end surface of the bottom plate (1) is provided with a shell (6), a plurality of circular magnets (7) are provided in the shell (6), and the circular magnets (7) are provided in the shell (6). The diameter of the iron (7) is smaller than the diameter of the circular hole (30); a spring (300) is arranged on the inner wall of the circular hole (30), and one end of the spring (300) is fixedly connected to a keypad (301); a plurality of arc-shaped grooves (302) are provided in the circular hole (30), and the diameter of the arc-shaped grooves (302) is larger than the diameter of the circular magnet (7); a second shell (8) is fixedly connected to the upper end surface of the bottom plate (1), and a cover body (9) is arranged in the second shell (8), and the diameter of the cover body (9) is larger than the diameter of the second cylinder (5).

2. A physical electromagnetism experiment teaching aid according to claim 1, characterized in that: The second cylinder (5) is made of ferromagnetic material, such as aluminum or copper, and the first cylinder (3) is made of polyethylene.

3. A physical electromagnetism experiment teaching aid according to claim 1, characterized in that: A handle (10) is fixedly connected to the upper end surface of the cylinder body (3).

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