Magnetic force testing device for teaching

Abstract

The utility model provides a magnetic force testing device for teaching, which comprises a rotating plate, a strip-shaped magnet is transversely arranged on the rotating plate, a position mark is arranged on the strip-shaped magnet, a mounting area for mounting a transparent glass tube is arranged below the strip-shaped magnet, the glass tube is propped against the side surface of the strip-shaped magnet during testing, and iron sand is filled in the glass tube. Scale marks are arranged on the two sides of the installation area. During testing, the rotating plate is inclined by a certain angle, the magnetic force intensity of each part of the strip-shaped magnet can be intuitively felt by observing the quantity of the iron sand adsorbed on one side of the strip-shaped magnet in the glass tube, and the magnetic force can be quantitatively measured through the scale marks. Compared with the prior art, the magnetic force measuring device has the beneficial effects that the operation is simple, and the magnetic force of each part of the magnet can be accurately and quantitatively measured.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetic experimental teaching equipment, specifically relating to a magnetic force testing device for teaching. Background Technology

[0002] To help students more intuitively understand and experience the effects and changing patterns of magnetism, teachers often design experimental activities to support teaching. Among these, observing how substances are attracted to magnets to demonstrate the differences in magnetic strength is one of the most direct and effective methods. Currently, there are two main methods used in classroom teaching to demonstrate or test magnetic properties:

[0003] 1. Method based on iron powder adsorption: This method typically involves sprinkling fine iron powder onto paper or other flat surfaces, then placing a magnet on top. The relative strength of the magnetic force at different locations on the magnet can be roughly determined by the pattern formed by the iron powder (usually concentrated at both ends). However, while this intuitive method allows students to perceive the magnetic force near the poles, it is difficult to achieve precise measurements, especially for accurately describing changes in magnetic force in non-extreme regions such as the center of the magnet.

[0004] 2. Paperclip Count Method: Another common approach is to use paperclips as the test object. The procedure involves preparing a certain number of paperclips and trying to attach them to different positions on a bar magnet until no more can be added. The maximum number of paperclips that can be suspended at each point reflects the strength of the magnetic force at that point. While this method achieves some quantification, it requires counting each paperclip individually, which is time-consuming. Furthermore, when measuring the magnetic force at the center of the magnet rather than at the two poles, the influence of the polarity may lead to inaccurate results.

[0005] In summary, while existing traditional methods can help us understand the characteristics of magnetic field distribution on magnet surfaces to some extent, they still have many limitations in practical applications, especially in obtaining more accurate and reliable quantitative data quickly and easily. Therefore, developing a novel device that maintains experimental simplicity while improving measurement accuracy is particularly important. Utility Model Content

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A magnetic force testing device for teaching includes a rotating plate on which a bar magnet is horizontally placed. The bar magnet has position marks. Below the bar magnet is a mounting area for a transparent glass tube, which, filled with iron filings, rests against the side of the bar magnet during testing. Graduation marks are located on both sides of the mounting area. During testing, the rotating plate is tilted at a certain angle, and the amount of iron filings adsorbed onto one side of the bar magnet inside the glass tube allows for a direct observation of the magnetic strength at different points on the bar magnet. The graduation marks allow for quantifiable measurement of the magnetic force.

[0008] As a preferred technical solution for a magnetic force testing device for teaching, this application also includes a base, on which two sets of upright plates are mounted, and a rotating plate is mounted between the upright plates. Rotating shafts that are mounted on the upright plates are mounted on both sides of the rotating plate. This design facilitates the placement of the rotating plate.

[0009] As a preferred technical solution for a magnetic force testing device used in teaching, a limiting block is installed on the side of the upright plate facing the rotating plate. The limiting block provides a clear operating range for the experiment, enhancing the safety and controllability of the experimental process.

[0010] As a preferred technical solution for a magnetic force testing device used in teaching, the scale markings include numbers and scale lines, with the scale lines in the two sets of markings connected correspondingly. This design allows users to quickly and accurately read data, ensuring the consistency and accuracy of measurement results. For teaching, this intuitive and easy-to-understand display method helps students better understand the experimental principles and their applications.

[0011] As a preferred technical solution for a magnetic force testing device used in teaching, the glass tube is closed at the bottom and open at the top. The top of the glass tube is fitted with a non-magnetic cap to prevent leakage of the internal iron filings and to facilitate the replacement or addition of experimental materials. During testing, the bottom of the glass tube abuts against a bar magnet, which can more directly and effectively demonstrate the effect of magnetic force and enhance the demonstration effect.

[0012] As a preferred technical solution for a magnetic force testing device used in teaching, the bar magnet is equipped with a housing. The housing can protect the magnet from external factors (such as impact, corrosion, etc.).

[0013] Compared with the prior art, this application has the following advantages: it is simple to operate and can accurately quantify and measure the magnetic force of various parts of the magnet. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the testing device.

[0015] Figure 2 This is an exploded view of the test device.

[0016] Figure 3 This is a plan view of the rotating plate.

[0017] The following is an explanation of the markings in the accompanying drawings:

[0018] 10. Rotating plate; 11. Rotating shaft; 12. Glass tube; 13. Cover; 14. Scale markings; 15. Numbers; 16. Scale lines;

[0019] 20. Base; 21. Vertical plate; 22. Limiting block;

[0020] 30. Bar magnet; 31. Housing; 32. Position marker. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Reference Figures 1 to 3 A magnetic force testing device for teaching purposes includes a rotating plate 10, on which a bar magnet 30 is horizontally placed. The bar magnet 30 has position marks 32. Below the bar magnet 30 is a mounting area for mounting a transparent glass tube 12. During testing, the glass tube 12 rests against the side of the bar magnet 30, and the glass tube 12 is filled with iron filings. Graduation marks 14 are provided on both sides of the mounting area.

[0025] In the experiment, the glass tube 12 was first fixed to the installation area using methods such as adhesive. Next, the rotating plate 10 was rotated, causing the iron filings inside the glass tube 12 to accumulate at the end closest to the bar magnet 30. Then, the rotating plate 10 was rotated in the opposite direction. At this point, under the influence of magnetic force, some of the iron filings continued to be attracted to the end closest to the bar magnet 30, while the remaining iron filings fell to the other end of the glass tube 12 under the influence of gravity. The number of iron filings attracted to the glass tube 12 varied depending on the difference in magnetic strength generated at different positions of the bar magnet 30. By observing and recording the scale marks 14 corresponding to these iron filings, the magnetic strength of different parts of the bar magnet 30 could be quantitatively analyzed and recorded.

[0026] The number of glass tubes 12 depends on the experimental requirements. For example, if only a simple magnetic force test is needed on five parts of the bar magnet 30, five sets of glass tubes 12 can be fixed in the mounting area corresponding to the five parts. However, if a precise measurement of the overall magnetic force change of the bar magnet 30 is required, the glass tubes 12 can be arranged without gaps in the mounting area.

[0027] To facilitate experimental recording, this application also includes a base 20, on which two sets of upright plates 21 are mounted. The rotating plate 10 is mounted between the upright plates 21, and rotating shafts 11, which are mounted on the upright plates 21, are mounted on both sides of the rotating plate 10. This design facilitates the placement of the rotating plate 10. A limiting block 22 is mounted on the side of the upright plate 21 facing the rotating plate 10. The limiting block 22 provides a clear operating range for experimental operations, enhancing the safety and controllability of the experimental process.

[0028] To improve measurement accuracy, the scale markings 14 include numbers 15 and scale lines 16, with the scale lines 16 in the two sets of scale markings 14 connected correspondingly. This design allows users to quickly and accurately read data, ensuring the consistency and accuracy of measurement results. For teaching, this intuitive and easy-to-understand display method helps students better understand the experimental principles and their applications. The bar magnet 30 is equipped with a housing 31. The housing 31 can protect the magnet from external factors (such as impact, corrosion, etc.).

[0029] In this application, the glass tube 12 is closed at the bottom and open at the top. The top of the glass tube 12 is fitted with a cap 13 made of non-magnetic material such as a wooden stopper or rubber stopper to ensure that the internal iron filings do not leak and to facilitate the replacement or addition of experimental materials. During testing, the bottom of the glass tube 12 abuts against the bar magnet 30, which can more directly and effectively demonstrate the effect of magnetic force and enhance the demonstration effect.

[0030] Furthermore, the scale markings 14 can be printed on white paper, and the glass tube 12 can be fixed to the white paper by adhesive. When different types of experiments are needed, only the corresponding scale paper needs to be replaced, without requiring any changes to the entire device. In addition to the basic numbers 15 and scale lines 16, more educational elements can be added to these printed white papers, such as simplified physics formulas, tips on relevant knowledge points, or interesting illustrations, to stimulate students' learning interest and help them better understand and remember the scientific principles behind the experiments. Moreover, if any problems are found with the existing scale system in the future (such as insufficient accuracy), or if new functionalities (such as a finer measurement range) are desired, these can be achieved simply by updating the printed template, without requiring extensive adjustments to the hardware itself.

[0031] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A magnetic force testing device for teaching, characterized by, It includes a rotating plate (10) and a base (20), the rotating plate (10) is provided with a bar magnet, the bar magnet (30) is provided with a position mark (32), the bar magnet (30) is provided with a mounting area for mounting a transparent glass tube (12), the glass tube (12) is abutted against the side of the bar magnet (30) during testing, and the glass tube (12) is filled with iron sand; the mounting area is provided with scale marks (14) on both sides; The base (20) is provided with two groups of vertical plates (21), the rotating plate (10) is assembled between the vertical plates (21), and the rotating plate (10) is provided with rotating shafts (11) assembled with the vertical plates (21) on both sides; the side of the vertical plate (21) facing the rotating plate (10) is provided with a limiting block (22); The scale marks (14) include numbers (15) and scale lines (16), and the scale lines (16) in the two groups of scale marks (14) are connected correspondingly.

2. A magnetic testing device for teaching purposes according to claim 1, characterized in that The glass tube (12) is closed at the bottom and open at the top; the top of the glass tube (12) is provided with a cover (13) made of non-magnetic material, and the bottom of the glass tube (12) is abutted against the bar magnet (30) during testing.

3. The magnetic testing device for teaching purposes according to claim 1, characterized in that The bar magnet (30) is provided with an outer shell (31).

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