Multifunctional electromagnetic demonstration device

Abstract

The technical problem to be solved by the utility model is to provide a multifunctional electromagnetic demonstration device, which integrates devices for exploring the phenomenon of electricity to magnetism and factors influencing the strength of electromagnet magnetism, and combines two experiments together, thereby being convenient for students to explore. The demonstration device comprises a base, a disc is rotationally arranged above the base, a stand column, a first T-shaped coil, a second T-shaped coil and a slide rheostat are arranged on the disc, and the number of turns of the first T-shaped coil is larger than the number of turns of the second T-shaped coil; the disc is further provided with a compass and a copper wire. A mounting plate is rotatably arranged at the upper end of the stand column, a battery holder, a switch seat, a wire holder and a plurality of connecting wires are arranged on the mounting plate, a fixing plate is arranged on the side wall of the base, a sliding plate is arranged above the fixing plate, and a magnet trolley is arranged on the sliding plate. And the phenomenon of generating magnetism by electricity is too fast after the copper wire is electrified.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching aid technical field, concretely relates to a multifunctional electromagnetic demonstration device. BACKGROUND

[0002] In the fourth unit of the sixth grade of the textbook version science, the third lesson "electricity and magnetism" and the fifth lesson "electromagnet" of the upper volume "energy" involve exploring the phenomenon that electric energy is converted into magnetic energy and the application that electric energy is converted into magnetic energy, and the experiment is carried out by using battery, fine wire, iron nail, compass and hairpin. The self-made electromagnet of the above-mentioned iron nail and hairpin is used to explore the factors influencing the magnetic property of electromagnet, and the size of magnetic property is judged by observing the number of attracted hairpins. The experiment has strong interaction, simple operation and low cost, students can observe the change of electromagnetic force by changing the number of batteries or the number of turns of the coil, increase the interestingness and participation of the experiment. But after the hairpin is attracted, the magnetic property will not fade in a short time, which will affect the experimental results, and when exploring the influence of the number of turns of the coil on the magnetic property of electromagnet, it needs to be repeatedly unwound and wound, which is complicated.

[0003] After electrifying, the compass is placed below the electrified wire, and the deflection of the compass needle is used to judge whether electricity generates magnetism. Through actual operation, students can directly observe the influence of electric current on the compass, so as to better understand the principle of electricity generating magnetism, but the teaching aid of this experiment is too scattered, and the compass is fixed and easy to be affected by vibration. And after learning the phenomenon of electricity generating magnetism, the understanding of electromagnet is more helpful, but the teaching aids required by the two experiments are complicated and scattered, and lack of integrated device. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem that a multifunctional electromagnetic demonstration device is provided, the device of "exploring the phenomenon of electricity generating magnetism" and "the factor influencing the strength of electromagnet" is integrated, and the two experiments are combined together, so that students can explore conveniently.

[0005] The utility model solves the technical problem and adopts the technical scheme that the multifunctional electromagnetic demonstration device comprises a base, a disc is arranged on the top of the base through a first rotating structure,

[0006] A stand, a first T-shaped coil, a second T-shaped coil and a sliding rheostat are arranged on the disc, the stand is located at the center position of the upper surface of the disc, the first T-shaped coil and the second T-shaped coil are symmetrically arranged about the stand, and the number of turns of the first T-shaped coil is greater than that of the second T-shaped coil,

[0007] A compass is further arranged on the disc,

[0008] The upper end of the column is provided with a mounting plate through a second rotating structure, the mounting plate is provided with a placing groove, and the placing groove is provided with a copper wire;

[0009] The mounting plate is provided with a battery holder, a switch holder, at least one wiring holder and a plurality of connecting wires, the battery holder is used for mounting a battery, the switch holder is used for controlling the on-off of a circuit, and the wiring holder and the connecting wires are used for connecting the circuit.

[0010] The side wall of the base is provided with a fixing plate, the upper side of the fixing plate is provided with a sliding plate through a supporting rod, and the sliding plate is provided with a magnet trolley.

[0011] Further, the upper surface of the sliding plate is provided with two baffles along the length direction thereof, the magnet trolley is located between the two baffles and a gap exists between the two baffles.

[0012] Further, the two baffles are made of transparent materials.

[0013] Further, the front side of the upper surface of the sliding plate is provided with a scale.

[0014] Further, the mounting plate is provided with at least one threading hole.

[0015] Further, the first rotating structure and the second rotating structure are both disc damping rotating shafts.

[0016] The two ends of the disc damping rotating shaft of the first rotating structure are fixed on the base and the disc respectively, and the two ends of the disc damping rotating shaft of the second rotating structure are fixed on the column and the mounting plate respectively.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The application will explore the factors affecting the magnetism of electromagnet and combine the Oersted experiment to realize integrated design in one device, which is convenient for operation and observation.

[0019] 2. The first rotating structure is provided with a disc, so that the first T-shaped coil and the second T-shaped coil with different turns are opposite to the magnet trolley, the operator can quickly operate, and the magnetic force of the electromagnet with different coil turns is quantified through the scale beside the trolley track; the sliding resistor is arranged to change the current in the circuit, so that the operator can explore the influence of the current size on the magnetism of the electromagnet.

[0020] 3. The copper wire and the compass are arranged in layers in the application, so as to prevent the two from being arranged in the same layer and being too close, causing the phenomenon to occur too fast after the copper wire is electrified, and the operator cannot observe carefully. DRAWINGS

[0021] Figure 1 The structural schematic view of the dynamic moon phase teaching instrument is described in the utility model.

[0022] Marked in the figure: base 1, disc 2, stand 3, first T-shaped coil 4, second T-shaped coil 5, sliding rheostat 6, compass 7, placing groove 8, copper wire 9, mounting plate 10, battery holder 11, switch holder 12, wiring holder 13, fixed plate 14, sliding plate 15, magnet trolley 16, baffle 17, scale 18, threading hole 19. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model will be further described below in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0024] It should be noted that all directional indication terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicated in the embodiments of the application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model, and are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, if the certain posture changes, the directional indication also changes accordingly.

[0025] In the application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] like Figure 1 As shown, this multifunctional electromagnetic demonstration device includes a base 1, which is preferably circular, and a disc 2 is provided above the base 1 via a first rotating structure.

[0028] The disk 2 is provided with a column 3, a first T-shaped coil 4, a second T-shaped coil 5, and a sliding rheostat 6. The column 3 is located at the center of the upper surface of the disk 2. The first T-shaped coil 4 and the second T-shaped coil 5 are symmetrically arranged about the column 3, and the number of turns of the first T-shaped coil 4 is greater than the number of turns of the second T-shaped coil 5.

[0029] The disc 2 is also equipped with a compass 7;

[0030] The upper end of the column 3 is provided with a mounting plate 10 through a second rotating structure. The mounting plate 10 is provided with a placement groove 8. A copper wire 9 is placed in the placement groove 8. The copper wire 9 and the compass 7 are used for the demonstration of Oersted's experiment.

[0031] The mounting plate 10 is provided with a battery holder 11, a switch holder 12, at least one terminal block 13 and several connecting wires. The several connecting wires are not shown in the figure. The battery holder 11 is used to install a battery to provide power. The switch holder 12 is used to control the on and off of the circuit. The terminal block 13 and the several connecting wires are used to connect the circuit.

[0032] The side wall of the base 1 is provided with a fixed plate 14, the upper side of the fixed plate 14 is provided with a sliding plate 15 through a support rod, the sliding plate 15 is provided with a magnet trolley 16, the support rod is not shown in the figure, the purpose of the support rod is to make the magnet trolley 16 and the first T-shaped coil 4 or the second T-shaped coil 5 at the same height, so that the first T-shaped coil 4 or the second T-shaped coil 5 can be opposite to the magnet trolley 16, the thickness of the support rod is adjusted according to the actual distance between the base 1 and the disc 2, which is not limited here; the magnet trolley 16, the first T-shaped coil 4 and the second T-shaped coil 5 are used to explore the influence of the number of turns of the coil on the magnetic size of the electromagnet; the magnet trolley 16, the first T-shaped coil 4 and the sliding rheostat 6 are used to explore the influence of the current size on the magnetic size of the electromagnet.

[0033] Specific embodiment one, explore the influence of the number of turns of the coil on the magnetic size of the electromagnet, connect the battery holder 11 and the switch holder 12 according to the correct circuit through the connecting wire, then connect the first T-shaped coil 4 and the switch holder 12 through the connecting wire, rotate the disc 2 through the first rotating structure, so that the first T-shaped coil 4 is aligned with the magnet trolley 16 on the sliding plate 15, then close the switch on the switch holder 12, observe the distance moved by the magnet trolley 16 on the sliding plate 15 and make a mark, then disconnect the connecting wire connected with the first T-shaped coil 4, connect one end of the connecting wire with the second T-shaped coil 5, and restore the magnet trolley 16 to the initial position, rotate the disc 2 through the first rotating structure, so that the second T-shaped coil 5 is aligned with the magnet trolley 16 on the sliding plate 15, then close the switch on the switch holder 12, observe the distance moved by the magnet trolley 16 on the sliding plate 15 and make a mark, compare the distances of the two times, and the experimental conclusion that "the more the number of turns of the coil, the stronger the magnetism of the electromagnet" is obtained.

[0034] Specific embodiment two, explore the influence of the current size on the magnetic size of the electromagnet, connect the battery holder 11 and the switch holder 12 according to the correct circuit through the connecting wire, then connect the sliding rheostat 6 and the first T-shaped coil 4 into the circuit in turn through the connecting wire, rotate the disc 2 through the first rotating structure, so that the first T-shaped coil 4 is aligned with the magnet trolley 16 on the sliding plate 15, at this time the sliding slide is located at the end with the maximum resistance, the switch on the switch holder 12 is closed, the distance moved by the magnet trolley 16 on the sliding plate 15 is observed and marked, then the switch on the switch holder 12 is disconnected and the magnet trolley 16 is restored to the initial position, then the sliding slide is slid by a certain distance, so that the resistance becomes smaller, the switch on the switch holder 12 is closed again, the distance moved by the magnet trolley 16 on the sliding plate 15 is observed and marked, the above steps are repeated several times, and the experimental conclusion that "the greater the current, the stronger the magnetism of the electromagnet" is obtained through the different distances of the magnet trolley 16 sliding under different resistances.

[0035] Specific embodiment three, reenacting the oster experiment - explore the phenomenon of electric energy conversion into magnetic energy, the battery holder 11 and switch holder 12 are connected according to the correct circuit with connecting wire, then take out the copper wire 9 from the recess 8, then connect the copper wire 9 and switch holder 12 with connecting wire, close the switch on the switch holder 12 to make the copper wire 9 power on, then put the copper wire 9 close to the compass 7, observe the change of the compass 7 needle, draw the conclusion that "the power line can convert electric energy into magnetic energy and produce magnetism".

[0036] As shown in Figure 1 In this embodiment, in order to avoid the magnet car 16 deviating from the preset track and leaving the slide plate 15, the upper surface of the slide plate 15 is provided with two baffles 17 along the length direction, the slide plate 15 and the two baffles 17 form a U-shaped slide, the magnet car 16 is located between the two baffles 17 and there is a gap between them, that is, there is a gap between each baffle 17 and the magnet car 16, so that the magnet car 16 can only move along the U-shaped slide, avoiding the condition of leaving the slide plate 15.

[0037] In this embodiment, in order to facilitate observation of the sliding condition of the magnet car 16, the two baffles 17 are made of transparent material, avoiding the condition that the side is blocked and cannot be seen, so that the sliding condition of the magnet car 16 can be observed from the top and two sides.

[0038] As shown in Figure 1 In this embodiment, in order to facilitate accurate recording of the sliding distance of the magnet car 16, and facilitate comparison of data to draw experimental conclusions, a scale 18 is arranged on the front side of the upper surface of the slide plate 15, the scale 18 is located outside the baffle 17, preferably a scale 18 is arranged on each of the front and rear sides of the upper surface of the slide plate 15, and the two scales 18 are located outside the two baffles 17 respectively, facilitating viewing of the distance scale on both sides, and the scale 18 can be used to accurately record the sliding distance of the magnet car 16, preferably, the initial position of the magnet car 16 is located on the scale line of the scale 180.

[0039] As shown in Figure 1 In this embodiment, in order to facilitate the connection between each component on the disc 2 and the switch holder 12, at least one threading hole 19 is arranged on the mounting plate 10, the number of the threading hole 19 can also be arranged according to actual needs, one end of the connecting wire passes through the threading hole 19 to realize connection with each component on the disc 2 below, avoiding the cumbersome and unattractive wiring from the outside of the mounting plate 10.

[0040] In this embodiment, as a preferred, the first rotating structure and the second rotating structure are both disc 2 damping rotating shafts;

[0041] The disc 2 damping rotating shaft of the first rotating structure is fixed at the base 1 and the disc 2 at both ends respectively, the disc 2 damping rotating shaft of the second rotating structure is fixed at the stand 3 and the mounting plate 10 at both ends respectively, and external force is applied when rotation is needed, the disc 2 damping rotating shaft can avoid random rotation of the disc 2 or the mounting plate 10, and effectively avoids the situation that the experiment is not accurate due to random rotation during the experiment.

[0042] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A multifunctional electromagnetic demonstration device, comprising a base (1), characterized in that: A disc (2) is provided above the base (1) via a first rotating structure; The disk (2) is provided with a column (3), a first T-shaped coil (4), a second T-shaped coil (5), and a sliding rheostat (6). The column (3) is located at the center of the upper surface of the disk (2). The first T-shaped coil (4) and the second T-shaped coil (5) are symmetrically arranged about the column (3), and the number of turns of the first T-shaped coil (4) is greater than the number of turns of the second T-shaped coil (5). A compass (7) is also provided on the disc (2); The upper end of the column (3) is provided with an installation plate (10) through a second rotating structure. The installation plate (10) is provided with a placement groove (8), and a copper wire (9) is provided in the placement groove (8). The mounting plate (10) is provided with a battery holder (11), a switch holder (12), at least one terminal block (13) and several connecting wires. The battery holder (11) is used to install a battery, the switch holder (12) is used to control the on and off of the circuit, and the terminal block (13) and several connecting wires are used to connect the circuit. A fixing plate (14) is provided on the side wall of the base (1), and a sliding plate (15) is provided above the fixing plate (14) by a support rod. A magnetic trolley (16) is provided on the sliding plate (15).

2. The multifunctional electromagnetic demonstration device according to claim 1, characterized in that: The upper surface of the slide (15) is provided with two baffles (17) along its length direction, and the magnetic trolley (16) is located between the two baffles (17) with a gap between them.

3. The multifunctional electromagnetic demonstration device according to claim 2, characterized in that: Both baffles (17) are made of transparent material.

4. The multifunctional electromagnetic demonstration device according to claim 1, characterized in that: A scale (18) is provided on the front side of the upper surface of the skateboard (15).

5. A multifunctional electromagnetic demonstration device according to claim 1, characterized in that: The mounting plate (10) has at least one wire hole (19).

6. The multifunctional electromagnetic demonstration device according to claim 1, characterized in that: Both the first and second rotating structures adopt a disc (2) damped rotating shaft; The first rotating structure's disc (2) damping shaft is fixed at both ends on the base (1) and the disc (2), respectively. The second rotating structure's disc (2) damping shaft is fixed at both ends on the column (3) and the mounting plate (10), respectively.

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