CN210324799U

CN210324799U - Novel lenz's law demonstration instrument

Info

Publication number: CN210324799U
Application number: CN201920935126.6U
Authority: CN
Inventors: 唐国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-04-14
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a novel Lenz law demonstration instrument, which comprises a main body and a strip-shaped strong magnet, wherein the main body comprises an upper mounting block, a lower mounting block and a first cylinder, the first cylinder is vertically arranged between the middle parts of the upper mounting block and the lower mounting block, the middle parts of the upper mounting block and the lower mounting block are vertically provided with holes with the same size as the inner diameter of the first cylinder, the first cylinder is spirally wound with a coil, the front surfaces of the upper mounting block and the lower mounting block are provided with an N-shaped LED lamp and an S-shaped LED lamp which are composed of a plurality of light-emitting diodes, the anode of the N-shaped LED lamp light-emitting diode on the upper mounting block and the lower mounting block is connected with the cathode of the S-shaped LED lamp light-emitting diode and then respectively connected with the two ends of the coil, the cathode of the N-shaped LED lamp light-emitting diode on the upper mounting block and the lower mounting block are connected with the anode, the first plug can be inserted into the lower jack, and the strong magnet can extend into the holes of the upper mounting block, the first cylinder and the lower mounting block; the demonstrator can be used for demonstrating Lenz's law.

Description

Novel lenz's law demonstration instrument

Technical Field

The utility model relates to a teaching demonstration instrument, in particular to novel lenz's law demonstration appearance.

Background

Lenz's law refers to electromagnetic induction in which, when the magnetic flux passing through a coil changes, a current is generated in the coil, and the force generated by the current and a magnetic field acts to create a tendency to impede the change of the magnetic flux. Lenz's law is an important law of electromagnetism, can be used for judging the direction of induced current, and is the key and difficult content of middle school physics. In order to make students understand Lenz's law better, it is very important to make a demonstration experiment. The existing Lenz law demonstration instrument cannot visually display the demonstration result and cannot demonstrate the law of induced current generation to reject retention, increase, decrease and expand.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a novel lenz's law demonstration appearance, can the visual display demonstration result.

The utility model aims at realizing through the following technical scheme:

a novel Lenz law demonstration instrument comprises a demonstration instrument main body and a bar-shaped strong magnet, wherein the demonstration instrument main body comprises an upper mounting block, a lower mounting block and a first cylinder, the first cylinder is vertically arranged between the middle parts of the upper mounting block and the lower mounting block, the middle parts of the upper mounting block and the lower mounting block are respectively and vertically provided with a hole with the same size as the inner diameter of the first cylinder, the first cylinder is spirally wound with a coil, the front surfaces of the upper mounting block and the lower mounting block are respectively provided with an N-shaped LED lamp and an S-shaped LED lamp, the N-shaped LED lamp and the S-shaped LED lamp are respectively composed of a plurality of light-emitting diodes, the anode of the N-shaped LED lamp light-emitting diode on the upper mounting block is connected with the cathode of the S-shaped LED lamp light-emitting diode and then connected with one end of the coil, the anode of the N-shaped LED lamp light-emitting diode on the lower mounting block is connected with the cathode of the S-shaped, the LED lamp comprises an upper mounting block, a lower mounting block, a first cylinder and a strong magnet, wherein the upper mounting block is provided with an upper LED lamp light-emitting diode cathode, the lower mounting block is provided with an upper LED lamp light-emitting diode cathode, the upper LED lamp light-emitting diode cathode is connected with an S-shaped LED lamp light-emitting diode anode to form a first connecting end, the lower mounting block is provided with an upper LED lamp light-emitting diode cathode, the lower LED lamp light-emitting diode cathode is connected with an S-shaped LED lamp light-emitting diode anode to form a second connecting end, the first connecting end and the second connecting end can be connected together, the.

Furthermore, a second cylinder with the same inner diameter as the first cylinder is vertically arranged in the middle of the bottom surface of the lower mounting block, and the free end of the second cylinder is vertically arranged in the middle of a base.

Furthermore, the base is fixedly arranged on an electronic scale.

Furthermore, two rails are oppositely arranged on the top surface of the upper mounting block, the front end of one rail is connected with one end of the coil, the front end of the other rail is connected with an upper jack, the other end of the coil is connected with a second plug, two ends of a metal rod are respectively lapped on the two rails, and the second plug is inserted into the upper jack.

Further, the middle part of one side of the strong magnet is connected to an organic glass plate through a connecting plate, the magnetic induction line of the strong magnet is carved on the organic glass plate, the organic glass plate is located on the outer side of the demonstration instrument main body, and the strong magnet is parallel to the organic glass.

Still further, the upper mounting block, the lower mounting block, the first cylinder, the second cylinder and the base are all made of organic glass.

The utility model has the advantages that:

the utility model discloses a novel lenz' S law demonstration appearance, when first plug does not insert down the jack, make the strong magnet move from top to bottom in the hole of demonstration appearance main part, all LED lamps can not be bright, can demonstrate the condition that induced-current produced, when first plug inserts down the jack, the N utmost point of strong magnet lower extreme moves downwards and gets into demonstration appearance main part hole, make the magnetic flux that passes the closed circuit increase, produce the induced-current of counter-clockwise direction (from last down looking) in the demonstration appearance, the demonstration appearance has become an electro-magnet, the N font LED lamp of demonstration appearance upper end is bright at this moment, the S style of calligraphy LED lamp of lower extreme is bright; otherwise, the N pole at the lower end of the strong magnet moves upwards to pull out the demonstration instrument, the S-shaped LED lamp at the upper end of the demonstration instrument is turned on, and the N-shaped LED lamp at the lower end of the demonstration instrument is turned on.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

fig. 1 is the main structure schematic diagram of the demonstration instrument of the utility model.

Fig. 2 is the structural schematic diagram of the strong magnet of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

As shown in figures 1-3, a novel Lenz' S law demonstrator comprises a demonstrator body and a bar-shaped strong magnet, wherein the bar-shaped strong magnet is preferably cylindrical, the demonstrator body comprises an upper mounting block 1, a lower mounting block 2 and a first cylinder 3, the first cylinder 3 is vertically arranged between the middle parts of the upper mounting block 1 and the lower mounting block 2, the first cylinder 3 is vertically arranged, the mounting block is preferably square, the middle parts of the upper mounting block 1 and the lower mounting block 2 are respectively and vertically provided with a hole with the same size as the inner diameter of the first cylinder 3, the first cylinder 3 is spirally wound with a coil 4, the front surfaces of the upper mounting block 1 and the lower mounting block 2 are respectively provided with an N-shaped LED lamp and an S-shaped LED lamp, the N-shaped LED lamp and the S-shaped LED lamp are both composed of a plurality of light-emitting diodes, the anode of the N-shaped LED lamp on the upper mounting block is connected with the cathode of the S-shaped LED lamp and then connected with one end of the coil, the anode of an N-shaped LED lamp light-emitting diode on the lower mounting block is connected with the cathode of an S-shaped LED lamp light-emitting diode and then connected to the other end of the coil, the cathode of the N-shaped LED lamp light-emitting diode on the upper mounting block is connected with the anode of the S-shaped LED lamp light-emitting diode to form a first connecting end, the cathode of the N-shaped LED lamp light-emitting diode on the lower mounting block is connected with the anode of the S-shaped LED lamp light-emitting diode to form a second connecting end, the first connecting end and the second connecting end can be connected together, the first connecting end is connected to a lower jack of the demonstration instrument body, the second connecting end is connected to a first plug of the demonstration instrument body, the first plug can be inserted into the lower jack, and the strong magnet 5 can extend into holes of the upper mounting block 1, the first cylinder 3; when the first plug is inserted into the lower jack, the N pole at the lower end of the strong magnet moves downwards to enter the hole of the demonstration instrument body, so that the magnetic flux passing through the closed loop is increased, the counter-clockwise induced current (seen from top to bottom) is generated in the demonstration instrument, the demonstration instrument becomes an electromagnet, the N-shaped LED lamp at the upper end of the demonstration instrument is bright, and the S-shaped LED lamp at the lower end of the demonstration instrument is bright; otherwise, the N pole at the lower end of the strong magnet moves upwards to pull out the demonstration instrument, the S-shaped LED lamp at the upper end of the demonstration instrument is turned on, and the N-shaped LED lamp at the lower end of the demonstration instrument is turned on.

The middle part of the bottom surface of the lower installation 2 pieces is vertically provided with a second cylinder 6 with the same inner diameter as the first cylinder 3, the free end of the second cylinder 6 is vertically arranged in the middle of a base 7, the lower end of the strong magnet 5 can extend into the hole of the second cylinder 6 by arranging the second cylinder 6, and the base 7 has the function of supporting and stabilizing.

The base 7 is fixedly arranged on an electronic scale, a first plug is inserted into a lower jack and is connected to form a closed loop, the N pole at the lower end of the strong magnet moves downwards to be close to the demonstration instrument, the N-shaped LED lamp at the upper end of the demonstration instrument is lightened, the S-shaped LED lamp at the lower end of the demonstration instrument is lightened, the number of the electronic scale below the demonstration instrument is increased and is larger than the gravity, and the demonstration instrument is subjected to the repulsive force of the bar magnet; otherwise, the N pole at the lower end of the strong magnet moves upwards to be far away from the demonstration instrument, the S-shaped LED lamp at the upper end of the demonstration instrument is lightened, the N-shaped LED lamp at the lower end of the demonstration instrument is lightened, the number of the electronic scale below the demonstration instrument is reduced and is smaller than the gravity, the demonstration instrument is shown to be attracted by the bar magnet, and the phenomenon that induced current generates is demonstrated here to reject the demonstration instrument.

Two rails 8 are oppositely arranged on the top surface of the upper mounting block 1, wherein the front end of one rail 8 is connected with one end of the coil, the front end of the other rail 8 is connected with an upper jack, the other end of the coil 4 is connected with a second plug, two ends of a metal rod 9 are respectively lapped on the two rails 8, the second plug is inserted into the upper jack, the metal rod 9 and the coil of the demonstration instrument form a closed loop, the N pole at the lower end of the strong magnet moves downwards to be close to the demonstration instrument, the metal rod moves backwards when the area enclosed by the loop is increased; and conversely, the N pole at the lower end of the strong magnet moves upwards to be far away from the demonstration instrument, and the fact that the metal rod moves forwards is found, and the area enclosed by the loop is reduced.

5 one side middle part of strong magnet is connected on an organic glass board 11 through a connecting plate 10, is carved with the magnetism line of feeling of strong magnet 5 on the organic glass board 11, and when strong magnet 5 was located the demonstration appearance main part, the organic glass board was located the demonstration appearance main part outside, and the strong magnet parallels with organic glass, can directly perceivedly see the magnetism line of feeling of strong magnet.

Go up installation piece 1, lower installation piece 2, first drum 3, second drum 6 and base 7 and make by organic glass, conveniently observe.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A novel Lenz's law demonstration instrument is characterized in that: including demonstration appearance main part and bar strong magnet, demonstration appearance main part includes installation piece, installation piece and first drum down, first drum sets up perpendicularly at last installation piece under and between installation piece middle part, it has the hole unanimous with first drum internal diameter size to go up vertical opening respectively in installation piece and installation piece middle part down, spiral winding has the coil on the first drum, it is equipped with N style of calligraphy LED lamp and S style of calligraphy LED lamp respectively to go up in installation piece and the preceding of installing the piece down, N style of calligraphy LED lamp and S style of calligraphy LED lamp are constituteed by a plurality of emitting diode, it links to each other after connecting on coil one end to go up the anodal LED lamp emitting diode of N style of calligraphy LED lamp and S style of calligraphy LED lamp emitting diode negative pole on the installation piece down, it links to each other after connecting with S style of calligraphy LED lamp emitting diode negative pole to go up the anodal LED lamp emitting diode of N style of calligraphy LED lamp and S style of calligraphy LED lamp emitting diode on the installation piece down, it links to go up the anodal LED lamp emitting diode of N style of calligraphy LED And then a first connecting end is formed, the negative electrode of the LED of the N-shaped LED lamp on the lower mounting block is connected with the positive electrode of the LED of the S-shaped LED lamp to form a second connecting end, the first connecting end and the second connecting end can be connected together, and the strong magnet can extend into holes of the upper mounting block, the first cylinder and the lower mounting block.

2. The novel Lenz's law demonstrator according to claim 1, wherein: and a second cylinder with the same inner diameter as the first cylinder is vertically arranged in the middle of the bottom surface of the lower mounting block, and the free end of the second cylinder is vertically arranged in the middle of a base.

3. The novel Lenz's law demonstrator according to claim 2, wherein: the base is fixedly arranged on an electronic scale.

4. The novel Lenz's law demonstrator according to claim 1, wherein: two rails are oppositely arranged on the top surface of the upper mounting block, the front end of one rail is connected with one end of the coil, the front end of the other rail is connected with an upper jack, the other end of the coil is connected with a second plug, two ends of a metal rod are respectively lapped on the two rails, and the second plug is inserted into the upper jack.

5. The novel Lenz's law demonstrator according to claim 1, wherein: the demonstration instrument is characterized in that the middle of one side of the strong magnet is connected onto an organic glass plate through a connecting plate, the magnetic induction line of the strong magnet is carved on the organic glass plate, the organic glass plate is located on the outer side of the demonstration instrument main body, and the strong magnet is parallel to the organic glass.

6. The novel Lenz's law demonstrator according to claim 3, 4 or 5, wherein: the upper mounting block, the lower mounting block, the first cylinder, the second cylinder and the base are all made of organic glass.