CN215932973U

CN215932973U - Electromagnetic conversion multifunctional demonstration instrument

Info

Publication number: CN215932973U
Application number: CN202122403280.9U
Authority: CN
Inventors: 罗盛; 黄运米; 徐嘉凯; 黄晓虹
Original assignee: Wenzhou University
Current assignee: Wenzhou University
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-01
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses an electromagnetic conversion multifunctional demonstration instrument, which relates to the technical field of physical demonstration and comprises a frame, a bottom plate and a vertical plate, wherein the cross section of the frame is in an inverted T shape, a through groove is formed in the middle of the vertical plate, a coil is arranged in the through groove in a rotating mode, a plurality of strip magnets are fixedly arranged on the front face of the frame in a U shape, the magnetic poles of the end parts of the two magnets which are in contact with each other are opposite, two indicating lamps are respectively and fixedly arranged above and below the through groove, a double-pole double-throw switch is arranged on one side of the top of the bottom plate and is electrically connected with the two indicating lamps, a battery pack is arranged on the other side of the top of the bottom plate and is used for supplying power to a circuit, and a galvanometer is used for detecting whether current exists in the circuit. The utility model can complete the electromagnetic experiment and the magnetic electromagnetic experiment through one frame, greatly saves the cost, can directly observe the change of the current direction according to the on-off condition of the indicator light during the experiment, can directly observe the change of the rotation of the coil, and has higher teaching value.

Description

Electromagnetic conversion multifunctional demonstration instrument

Technical Field

The utility model relates to the technical field of physical demonstration, in particular to an electromagnetic conversion multifunctional demonstration instrument.

Background

The knowledge of the physics subject is abstract, the electromagnetism is an important component of the physics of students in high school, and has a large proportion in the course standard requirements and examinations, and the electromagnetism is an abstract and difficult learning part in the physics for the high school students, so that the study feeling of the students on the electromagnetism is especially important. The teacher needs to take steps to assist in teaching and to allow the students to understand and accept the abstract physical knowledge. Teachers can make teaching aids by themselves, and understanding of students on knowledge of physical disciplines and connection to actual life are deepened through application of the self-made teaching aids in classes.

The existing electromagnetic conversion demonstration instrument is poor in comprehensiveness, only can singly demonstrate the conversion from electricity to magnetism or from magnetism to electricity, and cannot visually see the direction of current, so that students cannot easily perceive the relevant relation between the motion of a coil and the direction of the current.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an electromagnetic conversion multifunctional demonstration instrument, which can solve the problems in the prior art.

The utility model provides a multifunctional electromagnetic conversion demonstration instrument, which comprises:

the frame comprises a bottom plate and a vertical plate, the cross section of the frame is in an inverted T shape, and a through groove is formed in the middle of the vertical plate;

the coil is rotatably erected inside the through groove;

the bar magnets are fixedly arranged on the front surface of the frame in a U shape, and the magnetic poles of the ends of the two magnets which are in contact with each other are opposite;

the two indicating lamps are respectively and fixedly arranged above and below the through groove;

the double-pole double-throw switch is arranged on one side of the top of the bottom plate and is electrically connected with the two indicator lights;

the battery pack is arranged on the other side of the top of the bottom plate and used for supplying power to a circuit;

and the galvanometer is used for detecting whether current exists in the circuit or not.

Preferably, the coil is formed by winding a wire frame and a copper enameled wire.

Preferably, the wire frame is made of PVC material, and the specification of the copper enameled wire is 0.31 mm.

Preferably, the two indicator lights are both light emitting diodes and have different light emitting colors.

Preferably, the top and the bottom of the coil are respectively connected with the top and the bottom of the through groove in a rotating manner through rotating shafts.

Compared with the prior art, the utility model has the beneficial effects that:

(1) can accomplish the electricity and give birth to magnetism experiment and magnetism through a frame, practice thrift the cost greatly, improve the practicality of this demonstration appearance, be equipped with the pilot lamp of two different colours simultaneously, can directly observe the change of electric current direction according to the bright circumstances of going out of pilot lamp when carrying out the experiment, can directly see coil pivoted change, have higher teaching value.

(2) The double-pole double-throw switch is used for simulating the commutator, so that the effect of the switching direction of the double-pole double-throw switch on the rotation direction of the coil can be visually seen, and students can understand the effect of the commutator in practical application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an electromagnetic conversion multifunctional demonstration instrument of the utility model;

fig. 2 is a circuit diagram of the electromagnetic multifunctional converter of the present invention.

In the figure: 1-frame, 2-through groove, 3-coil, 4-magnet, 5-pilot lamp, 6-double-pole double-throw switch, 7-battery pack, 8-galvanometer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-2, the utility model provides an electromagnetic conversion multifunctional demonstration instrument, which comprises a frame 1 with an inverted T-shaped section, wherein the frame 1 is made of a three-in-one plate material and consists of a bottom plate and a vertical plate, a through groove 2 is formed in the middle of the vertical plate, a coil 3 is rotatably arranged in the through groove 2, the coil 3 consists of a wire frame and a copper enameled wire wound outside the wire frame, a plurality of bar magnets are fixedly arranged on the vertical plate and are arranged around the through groove 2 in a U shape, the magnetic poles of the ends of the two magnets 4 which are contacted with each other are opposite, indicator lights 5 with different colors are fixedly arranged above and below the through groove 2, the indicator lights 5 are light emitting diodes, the light emitting diodes are fixed on the front surface of the frame 1 through binding posts, a double-pole double-throw switch 6 is arranged on one side of the top of the bottom plate of the frame 1, is electrically connected with the indicator light 5, and the other side of the vertical direction is provided with a battery pack 7, and the battery pack 7 supplies power for the whole circuit.

Specifically, in this example, the wire frame is made of PVC material, the specification of the copper enameled wire is 0.31mm, and according to the experiment, it is found that the effect is better when the coil is wound for 160 circles, the resistance of the coil is not too small to cause the led lamp to be damaged or too large to cause the led lamp to have smaller brightness, and meanwhile, the coil is wound for 160 circles to enable the coil to rotate under the action of the strip magnets on the two sides.

When carrying out the electromagnetic experiment, link together pilot lamp 5, double-pole double-throw switch 6 and group battery 7 through the wire, through switching double-pole double-throw switch 6, change the direction of electric current in the circuit, can see coil 3 rotatory towards different directions, also can see the bright circumstances of going out of two pilot lamps 5 under different direction of rotation simultaneously, can directly observe the change of electric current direction.

Example 2

Placing galvanometer 8 in one side of frame 1, when carrying out the experiment that the magnetism generates electricity, passing through the wire with galvanometer 8 and pilot lamp 5 and linking together, disconnection double-pole double-throw switch 6, manual not equidirectional rotation coil 3 can see galvanometer 8 and detect out the electric current of equidirectional, also can see the bright circumstances of going out of two pilot lamps 5 under the different rotation direction simultaneously, can directly observe the change of electric current direction.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a multi-functional demonstration appearance of electromagnetic conversion which characterized in that includes:

the frame (1) comprises a bottom plate and a vertical plate, the cross section of the frame is in an inverted T shape, and the middle part of the vertical plate is provided with a through groove (2);

the coil (3) is rotatably erected inside the through groove (2);

the bar magnets (4) are fixedly arranged on the front surface of the frame (1) in a U shape, and the magnetic poles of the ends of the two magnets (4) which are in contact with each other are opposite;

the two indicating lamps (5) are respectively and fixedly arranged above and below the through groove (2);

the double-pole double-throw switch (6) is arranged on one side of the top of the bottom plate and is electrically connected with the two indicator lamps (5);

the battery pack (7) is arranged on the other side of the top of the bottom plate and used for supplying power to a circuit;

and the galvanometer (8) is used for detecting whether current exists in the circuit or not.

2. The multifunctional electromagnetic conversion demonstrator of claim 1, wherein said coil (3) is formed by winding a wire frame and 160 copper enameled wires.

3. The electromagnetic conversion multifunctional demonstration instrument according to claim 2, wherein the wire frame is made of PVC material.

4. The multifunctional electromagnetic conversion demonstrator of claim 1, wherein both said indicator lights (5) are light emitting diodes and have different colors.

5. The multifunctional demonstrator of claim 1, wherein the top and bottom of the coil (3) are rotatably connected to the top and bottom of the through slot (2) by a rotating shaft, respectively.