Electromagnetic induction device for physics laboratory

Abstract

The utility model discloses an electromagnetic induction device for a physics laboratory, a magnetic induction line cutting device is connected in series with a small bulb and an ampere meter through wires to form a closed circuit, the magnetic induction line cutting device comprises a mounting plate, a guide rod assembly and a sleeve frame, the upper end of the mounting plate is fixedly connected with the sleeve frame, and the guide rod assembly is fixedly connected with the sleeve frame. A plurality of coils are wound on the sleeve frame, a plurality of wiring knobs are fixedly connected to the mounting plate, the bottoms of the wiring knobs are connected with the coils through wires, a guide rod assembly is connected in a sleeve of the sleeve frame in a sliding sleeve mode, a rope is fixedly connected to one end of the guide rod assembly, a guide wheel frame is fixedly connected to one end of the mounting plate, and the guide wheel frame is fixedly connected to the other end of the mounting plate. The guide wheel frame is rotationally connected with a wire guide wheel, the rope is connected with the lifting hook after bypassing the wire guide wheel, and the mounting plate on one side of the guide wheel frame is fixedly connected with a limiting plate. The utility model aims to provide the electromagnetic induction device for the physics laboratory, which is high in operation flexibility, convenient to adjust experimental parameters and strong in structural stability.

Description

Technical Field

[0001] This utility model relates to the field of teaching experimental equipment technology, specifically an electromagnetic induction device for physics laboratories. Background Technology

[0002] With the continuous development of physics, especially electromagnetism, electromagnetic induction has become an important phenomenon in modern physics experimental teaching. Electromagnetic induction refers to the phenomenon that an induced current is generated in a conductor in a changing magnetic field; this phenomenon is the core of Faraday's law of electromagnetic induction. Electromagnetic induction has wide applications in various electrical devices such as motors, generators, and transformers, and is an indispensable basic experiment in electromagnetism teaching and research.

[0003] While various electromagnetic induction experimental devices exist in traditional physics laboratories to demonstrate the relationship between magnetic fields and electric currents, these devices suffer from several shortcomings. These include complex operation, unintuitive experimental procedures, inconvenient adjustment of experimental parameters, and difficulty in observing and controlling experimental results. Furthermore, most existing electromagnetic induction devices can only demonstrate the generation of current, lacking precise control and measurement of current intensity and its variation patterns, thus failing to effectively showcase the diversity and complexity of electromagnetic induction phenomena.

[0004] Many existing experimental setups employ simple fixed coils and magnets, changing the magnetic field manually or mechanically. While these setups can demonstrate basic experiments, their designs are typically simplistic and lack flexible adjustment of experimental parameters (such as the number of coil turns, magnet strength, and conductor speed). This often results in students obtaining only limited information during experiments and struggling to gain a deep understanding of the physical essence of electromagnetic induction.

[0005] Therefore, there is an urgent need for a more precise and easy-to-operate experimental device for electromagnetic induction to improve students' understanding of electromagnetic induction phenomena and provide experimenters with a more flexible and intuitive experimental platform. This device should not only be able to demonstrate the generation of current but also allow for adjustment of experimental parameters and provide more comprehensive experimental data to better demonstrate the application and practical effects of Faraday's law of electromagnetic induction.

[0006] The electromagnetic induction device provided by this utility model aims to overcome the shortcomings of the prior art. Through optimized design, the experimental process is made simpler and more intuitive, the adjustment of experimental parameters is more flexible, and it can accurately measure and demonstrate electromagnetic induction phenomena, thus meeting the needs of modern physics teaching and experimental research. Utility Model Content

[0007] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide an electromagnetic induction device for physics laboratories that has high operational flexibility, is easy to adjust experimental parameters, and has strong structural stability.

[0008] The technical solution adopted by this utility model to achieve the above-mentioned objectives is as follows: an electromagnetic induction device for a physics laboratory, comprising a magnetic wire cutting device, a small light bulb, and an ammeter. The magnetic wire cutting device is connected in series with the small light bulb and the ammeter through a wire to form a closed circuit. The experimental principle of this device is to generate a corresponding current by cutting magnetic wires, and the generated current lights up the small light bulb in the closed circuit. At the same time, the generated current can be measured by the ammeter. The magnetic wire cutting device includes a mounting plate, a guide rod assembly, a sleeve frame, a limiting plate, a guide wheel frame, and a rope. The upper end of the mounting plate is fixedly connected to the sleeve frame, and several coils are wound on the sleeve of the sleeve frame. Multiple terminals are fixedly connected to the mounting plate on one side of the sleeve frame. The terminals are arranged linearly in sequence, and the bottom of each terminal is respectively... The guide rod assembly is connected to the coil via a wire. A magnetic rod is installed inside the sleeve of the sleeve frame. When the guide rod assembly slides within the sleeve frame, the coil on the sleeve frame cuts the magnetic lines of force around the magnetic rod, thus generating a current in the coil. A rope is fixedly connected to one end of the guide rod assembly, and a guide wheel frame is fixedly connected to one end of the mounting plate. A guide wheel is rotatably connected to the guide wheel frame. The rope passes over the guide wheel and connects to a hook. During the experiment, a counterweight can be hooked onto the hook. The counterweight falls freely under its own weight and pulls the guide rod assembly through the rope, providing rated power for the movement of the guide rod assembly. A limit plate is fixedly connected to the mounting plate on one side of the guide wheel frame to limit the position of the guide rod assembly.

[0009] In the above technical solution, the guide rod assembly includes a slide rod, a fitting body, a magnetic rod, and a latch. The slide rod has a slot in the middle, and the fitting body is fitted into the slot. A fitting groove is formed between the fitting body and the bottom surface of the slot. The magnetic rod is fitted into the fitting groove. A latch is provided between the two sides of the fitting body and the slide rod.

[0010] In the above technical solution, the outer peripheral sidewall of the guide rod assembly is provided with two axially arranged sliding guide grooves, which are symmetrically distributed on the guide rod assembly. Two sets of symmetrical damping wheels are fixedly connected to both ends of the sleeve frame, and the damping wheels are respectively rolled in the sliding guide grooves.

[0011] In the above technical solution, a roller frame is fixedly connected to the other end of the mounting plate, a guide wheel is fixedly connected to the upper middle part of the roller frame, and a sliding wheel is fixedly connected to the mounting plate below the guide wheel. The guide wheel and the sliding wheel are respectively tumblingly connected in the guide groove.

[0012] In the above technical solution, a reinforcing rib is fixedly connected between the limiting plate and the guide wheel frame, and a buffer pad is fixedly connected to the other side of the limiting plate.

[0013] The beneficial effects of this utility model are:

[0014] 1. Improve the intuitiveness and operability of the experiment: This device, through the design of flexible guide rod components and sliding mechanism, can intuitively demonstrate the influence of magnetic field changes on current. The experimental process is simple and easy to understand, and the experimenter can clearly observe the occurrence of electromagnetic induction, thereby enhancing students' understanding of the principle of electromagnetic induction.

[0015] 2. Adjustable experimental parameters: This device allows experimenters to flexibly adjust experimental parameters such as the number of coil turns, magnetic field strength, and the movement speed of the guide rod assembly, providing a wider range of experimental options and data analysis possibilities, which helps to explore the laws of electromagnetic induction in depth.

[0016] 3. Precise current measurement: By introducing an ammeter into the circuit, the experimenter can accurately measure the magnitude of the induced current through the coil and observe the change in the brightness of the light bulb based on the change in current, thereby better understanding the relationship between electromagnetic induction and current intensity.

[0017] 4. Stability and Safety: The device design incorporates stabilizing structures such as damping wheels, guide grooves, and limiting plates, effectively preventing the guide rod assembly from sliding too quickly or unstablely, ensuring a smooth experimental process. Simultaneously, the limiting plate effectively restricts the guide rod's range of motion, reducing the risk of damage caused by exceeding the predetermined range and improving experimental safety.

[0018] 5. Diversity and scalability of experiments: This device is not only suitable for basic electromagnetic induction demonstrations, but can also be extended to other experiments as needed. For example, by changing the connection method of the coil or introducing different types of conductors, the experimental content can be enriched to meet different experimental needs and enhance the depth of teaching and research.

[0019] In conclusion, the electromagnetic induction device of this invention has significant application value in physics experiment teaching. It can not only accurately demonstrate the basic principles of electromagnetic induction, but also provide flexible adjustment of experimental parameters and stable experimental conditions, greatly improving the teaching effect and practicality of the experiment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the magnetic wire cutting device of this utility model;

[0022] Figure 3 for Figure 2 Detailed structural diagram of part A1 in the middle;

[0023] Figure 4 for Figure 2Detailed structural diagram of part A2 in the middle;

[0024] Figure 5 for Figure 2 Detailed structural diagram of section A3;

[0025] Figure 6 This is a schematic diagram of the disassembled structure of the guide rod assembly of this utility model.

[0026] In the diagram: 1 Magnetic wire cutting device, 2 Small light bulb, 3 Ammeter, 101 Mounting plate, 102 Guide rod assembly, 103 Sleeve rack, 104 Limiting plate, 105 Guide wheel rack, 106 Rope, 107 Coil, 108 Terminal button, 109 Guide wheel, 110 Hook, 201 Slide rod, 202 Fitting body, 203 Magnetic rod, 204 Lock, 205 Groove, 206 Fitting groove, 301 Sliding guide groove, 302 Damping wheel, 401 Roller rack, 402 Sliding guide wheel, 403 Sliding wheel, 501 Reinforcing rib, 502 Buffer pad. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6An electromagnetic induction device for a physics laboratory includes a magnetic field line cutting device 1, a small light bulb 2, and an ammeter 3. The magnetic field line cutting device 1 is connected in series with the small light bulb 2 and the ammeter 3 to form a closed circuit. The experimental principle of this device is to generate a corresponding current by cutting magnetic field lines, which lights up the small light bulb 2 in the closed circuit. The ammeter 3 can measure the generated current. The magnetic field line cutting device 1 includes a mounting plate 101, a guide rod assembly 102, a sleeve frame 103, a limiting plate 104, a guide wheel frame 105, and a rope 106. The sleeve frame 103 is fixedly connected to the upper end of the mounting plate 101. Several coils 107 are wound on the sleeve of the sleeve frame 103. Multiple terminals 108 are fixedly connected to the mounting plate 101 on one side of the sleeve frame 103. The terminals 108 are arranged linearly. The bottom of each terminal 108 is connected to the coil 107 through a wire. The sleeve of the sleeve frame 103 has a sliding sleeve. A guide rod assembly 102 is connected, and a magnetic rod 203 is installed inside the guide rod assembly 102. When the guide rod assembly 102 slides inside the sleeve frame 103, the coil 107 on the sleeve frame 103 will cut the magnetic field lines around the magnetic rod 203, thereby generating a current in the coil 107. One end of the guide rod assembly 102 is fixedly connected to a rope 106, and one end of the mounting plate 101 is fixedly connected to a guide wheel frame 105. A guide wheel 109 is rotatably connected to the guide wheel frame 105. The rope 106 passes around the guide wheel 109 and is connected to a hook 110. During the experiment, a counterweight can be hooked through the hook 110. The counterweight falls freely under its own weight and pulls the guide rod assembly 102 to move through the rope 106, providing rated power for the movement of the guide rod assembly 102. A limit plate 104 is fixedly connected to the mounting plate 101 on one side of the guide wheel frame 105 to limit the position of the guide rod assembly 102.

[0029] In one embodiment of this utility model, from left to right, the first terminal 108 is connected to the end of the coil 107, the second terminal 108 is connected to the first terminal 108 with 10 turns of coil 107, the third terminal 108 is connected to the first terminal 108 with 20 turns of coil 107, and the fourth terminal 108 is connected to the first terminal 108 with 30 turns of coil 107. When connected in series with the light bulb 2 and the ammeter 3, one end of the closed circuit is connected to the first terminal 108, and the other end of the closed circuit is connected to one of the second, third, and fourth terminal 108.

[0030] In one embodiment of this utility model, the guide rod assembly 102 includes a slide rod 201, a fitting body 202, a magnetic rod 203, and a latch 204. The slide rod 201 has a slot 205 in the middle, and the fitting body 202 is fitted into the slot 205. A fitting groove 206 is formed between the fitting body 202 and the bottom surface of the slot 205. The magnetic rod 203 is fitted into the fitting groove 206. The latch 204 is provided between the two sides of the fitting body 202 and the slide rod 201. In this utility model, after the fitting body 202 is connected into the slot 205, the middle part of the slide rod 201 forms a columnar body of the same diameter, which facilitates the sliding of the whole assembly on the sleeve frame 103. The latch 204 can facilitate the disassembly and fixation of the fitting body 202, thereby facilitating the replacement of the magnetic rod 203 with different magnetic strengths in the fitting groove 206.

[0031] In one embodiment of this utility model, the outer peripheral sidewall of the guide rod assembly 102 is provided with two axially arranged sliding guide grooves 301, which are symmetrically distributed on the guide rod assembly 102. Two sets of symmetrical damping wheels 302 are fixedly connected to both ends of the sleeve bracket 103. The damping wheels 302 are rolled in the sliding guide grooves 301. First, the sliding of the damping wheels 302 in the sliding guide grooves 301 can provide stability for the sliding of the guide rod assembly 102, and at the same time provide a certain resistance to the sliding of the guide rod assembly 102, so as to prevent the guide rod assembly 102 from moving too fast.

[0032] In one embodiment of this utility model, a roller frame 401 is fixedly connected to the other end of the mounting plate 101, a guide wheel 402 is fixedly connected to the middle of the upper end of the roller frame 401, and a sliding wheel 403 is fixedly connected to the mounting plate 101 below the guide wheel 402. The guide wheel 402 and the sliding wheel 403 are respectively rolled in the guide groove 301 to provide a stable support structure for the sliding process of the guide rod assembly 102, and further improve the sliding stability of the guide rod assembly 102.

[0033] In one embodiment of this utility model, a reinforcing rib 501 is fixedly connected between the limiting plate 104 and the guide wheel frame 105, and a buffer pad 502 is fixedly connected to the other side of the limiting plate 104 to provide buffering for the interception of the guide rod assembly 102 and reduce the impact force generated by the collision with the limiting plate 104.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electromagnetic induction device for a physics laboratory, comprising a magnetic wire cutting device (1), a small light bulb (2), and an ammeter (3), characterized in that: The magnetic wire cutting device (1) is connected in series with a small light bulb (2) and an ammeter (3) to form a closed circuit. The magnetic wire cutting device (1) includes a mounting plate (101), a guide rod assembly (102), a sleeve frame (103), a limiting plate (104), a guide wheel frame (105), and a rope (106). The upper end of the mounting plate (101) is fixedly connected to the sleeve frame (103). Several coils (107) are wound on the sleeve of the sleeve frame (103). Several wiring buttons (108) are fixedly connected to the mounting plate (101) on one side of the sleeve frame (103). The bottom of the wiring button (108) is connected to the coil (107) by wires. The guide rod assembly (102) is connected to the inner sleeve of the sleeve frame (103). One end of the guide rod assembly (102) is fixedly connected to the rope (106). One end of the mounting plate (101) is fixedly connected to the guide wheel frame (105). The guide wheel frame (109) is rotatably connected to the guide wheel frame (105). The rope (106) passes around the guide wheel (109) and is connected to the hook (110). A limit plate (104) is fixedly connected to the mounting plate (101) on one side of the guide wheel frame (105).

2. The electromagnetic induction device for a physics laboratory according to claim 1, characterized in that: The guide rod assembly (102) includes a slide rod (201), a fitting body (202), a magnetic rod (203), and a latch (204). The slide rod (201) has a slot (205) in the middle, and the fitting body (202) is fitted into the slot (205). A fitting groove (206) is opened between the fitting body (202) and the bottom surface of the slot (205). The magnetic rod (203) is fitted into the fitting groove (206). A latch (204) is provided between the fitting body (202) and the slide rod (201) on both sides.

3. The electromagnetic induction device for a physics laboratory according to claim 1, characterized in that: The outer peripheral sidewall of the guide rod assembly (102) is provided with two axially arranged sliding guide grooves (301). The two sliding guide grooves (301) are symmetrically distributed on the guide rod assembly (102). Two sets of symmetrical damping wheels (302) are fixedly connected to both ends of the sleeve frame (103). The damping wheels (302) are rolled in the sliding guide grooves (301).

4. The electromagnetic induction device for a physics laboratory according to claim 1, characterized in that: The other end of the mounting plate (101) is fixedly connected to a roller frame (401), and a guide wheel (402) is fixedly connected to the middle of the upper end of the roller frame (401). A sliding wheel (403) is fixedly connected to the mounting plate (101) below the guide wheel (402). The guide wheel (402) and the sliding wheel (403) are respectively rolled in the guide groove (301).

5. The electromagnetic induction device for a physics laboratory according to claim 1, characterized in that: A reinforcing rib (501) is fixedly connected between the limiting plate (104) and the guide wheel frame (105), and a buffer pad (502) is fixedly connected to the other side of the limiting plate (104).

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