CN210896148U

CN210896148U - Improved electromagnetic induction demonstration instrument

Info

Publication number: CN210896148U
Application number: CN201922108894.7U
Authority: CN
Inventors: 郭敬明; 郭欢; 李朋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-06-30
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a modified electromagnetic induction demonstration appearance, one end on the wooden bottom plate is setting up two double-throw double-pole knife switch, install the bulb on the lamp stand of the other end setting on the wooden bottom plate, vertically set up two metal track that are parallel to each other on the bottom plate between double-throw double-pole knife switch and the bulb, bottom plate in two metal track is setting up the annular magnet that vertical equipartition was arranged, the tubular metal resonator is being placed to horizontal cooperation on the metal track, the anodal and the negative pole of battery are connecting the inlet wire anodal and the negative pole of double-throw double-pole knife switch respectively through the wire, a metal track tip of double-throw double-pole knife switch one side is connecting the first connection terminal of double-throw double-pole knife switch through the wire, another pole of this side is connecting the utmost point of lamp stand through the wire, the second connection terminal of double-throw double-pole knife switch is being connected through the wire to the other pole of lamp stand. The utility model discloses rational in infrastructure, convenient operation makes the slip of activity wire become the roll, and the velocity of motion is slow, and movement distance is long, reinforcing demonstration effect.

Description

Improved electromagnetic induction demonstration instrument

Technical Field

The utility model belongs to the improvement of electromagnetic induction demonstration appearance structure, especially a modified electromagnetic induction demonstration appearance.

Background

The structure of traditional electromagnetic induction demonstration ware is two parallel bare conductors of fixed on wooden base, puts a U-shaped magnet in the middle of parallel bare conductor, and a bare copper line is violently put to one end, and bare copper line both ends and parallel bare conductor contact. The power is supplied by 6V direct current. The working principle is that a circuit is connected, and the copper wire has current to pass through. The electrified copper conductor is positioned in a magnetic field, and the copper conductor can move under the action of magnetic lines of force according to the left-hand rule, the movement mode is sliding, and the movement direction is determined by the current direction or the direction of the magnetic lines of force.

The traditional electromagnetic induction demonstrator is small in size, the movable wire slides, the movement distance is short (8 cm), the movement speed is high, and the demonstration effect is not good. The change of the current direction requires the exchange of power supply wiring, and the operation is not smooth.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a modified electromagnetic induction demonstration appearance, its is rational in infrastructure, and convenient operation makes the slip of activity wire become the roll, and the rate of motion is slow, and the movement distance is long, can strengthen the demonstration effect.

The purpose of the utility model is realized like this: an improved electromagnetic induction demonstration instrument, wherein a double-throw double-knife switch is arranged at one end of a rectangular wooden bottom plate, a bulb is arranged on a lamp holder arranged at the other end of the wooden bottom plate, two parallel metal rails are longitudinally arranged on the bottom plate between the double-throw double-pole knife switch and the bulb, the bottom plates in the two metal tracks are provided with annular magnets which are longitudinally and uniformly distributed, metal tubes are transversely arranged on the metal tracks in a matching way, the positive pole and the negative pole of a storage battery are respectively connected with the positive pole and the negative pole of the incoming line of the double-throw double-pole knife switch through leads, the end part of one metal track positioned at one side of the double-throw double-pole knife switch is connected with a first wiring seat of the double-throw double-pole knife switch through a lead, the end part of the other metal rail at the side is connected with one pole of a lamp holder through a lead, and the other pole of the lamp holder is connected with a second wire holder of the double-throw double-pole knife switch through a lead.

The utility model discloses a accomplish according to the preparation of electromagnetic induction principle, do a length 70 centimetres, wide 15 centimetres wood system bottom plate, fixed 6 ring magnets on wood system bottom plate, make it magnetic field N utmost point towards same direction. Two parallel metal tracks are fixed along the edges of the magnets. One end of the bottom plate is provided with a 12V bulb, the other end of the bottom plate is provided with a double-throw double-pole knife switch, and the inlet wires of the double-throw double-pole knife switch are connected in a crossed manner. One end of each of the two parallel metal tracks is connected with a double-throw double-knife switch outgoing line respectively and is connected with the 12V bulb in series, and the other end of each of the two parallel metal tracks is open-circuited. The power is supplied by a 12V storage battery. A copper pipe (aluminum pipe) with the diameter of 0.5 cm is used as a movable lead, and two ends of the movable lead are in contact with the parallel metal tracks.

During demonstration, the double-throw double-pole knife switch is stopped in the middle (circuit off state), the storage battery is connected, the metal tube is transversely placed on one side of the double-throw double-pole knife switch, then the double-throw double-pole knife switch is closed leftwards, the bulb is on, and meanwhile, the metal tube rolls rightwards to one end of the bulb. Then the double-throw double-pole knife switch is closed rightwards, the anode and the cathode of a power supply are exchanged, the current direction is changed, and the metal tube rolls leftwards to one end of the double-throw double-pole knife switch.

The improved utility model discloses bulky, become the slip of activity wire and be the roll, the velocity of motion is slow, and the movement distance is long (50 centimetres), reinforcing demonstration effect. The current direction is changed by using a double-throw double-knife switch, so that the operation is convenient.

The working principle is that a power supply is switched on, a bulb is on, a circuit is connected, and a metal tube has current passing through. Magnets are arranged below the parallel metal tracks, and the metal pipe can roll under the action of magnetic lines of force according to the left-hand rule. The rolling direction of the metal tube is also determined by the direction of the current and the direction of the magnetic force lines. The demonstration effect is more directly perceived obvious, presses close to the production practicality. The method is suitable for teaching of science and electromagnetic parts.

The utility model discloses rational in infrastructure, convenient operation makes the slip of activity wire become the roll, and the velocity of motion is slow, and movement distance is long, has strengthened the demonstration effect.

Drawings

The present invention will be further described with reference to the accompanying drawings, wherein fig. 1 is a main view schematic diagram of the present invention, fig. 2 is a bottom view schematic diagram of fig. 1, and fig. 3 is an electrical schematic diagram of the present invention.

Detailed Description

An improved electromagnetic induction demonstration instrument is disclosed, as shown in fig. 1, fig. 2 and fig. 3, a double-throw double-pole knife switch 2 is arranged at one end of a rectangular wooden bottom plate 1, a lamp bulb 3 is arranged on a lamp holder 7 arranged at the other end of the wooden bottom plate 1, two metal rails 4 which are parallel to each other are longitudinally arranged on the bottom plate 1 between the double-throw double-pole knife switch 2 and the lamp bulb 3, annular magnets 5 which are uniformly and longitudinally arranged are arranged on the bottom plate 1 in the two metal rails 4, metal tubes 6 are transversely matched and arranged on the metal rails 4, the positive pole and the negative pole of a storage battery 9 are respectively connected with the positive pole and the negative pole of an incoming line of the double-throw double-pole knife switch 2 through leads, the end part of one metal rail 4 at one side of the double-throw double-pole knife switch 2 is connected with a first wiring holder 10 of the double-throw double-pole knife switch 2 through leads, the end part of the other metal rail 4 at the side, the other pole of the lamp holder 7 is connected with a second wire holder 11 of the double-throw double-pole knife switch 2 through a wire. The number of the uniformly distributed annular magnets 5 is 6, and N levels of the annular magnets 5 face the same direction. The double-throw double-pole knife switch 2 is a bidirectional change-over switch. The metal tube 6 is a copper tube or an aluminum tube. The height of the ring magnet 5 is lower than the height of the metal track 4. The bottom surface of the wood bottom plate 1 is provided with a supporting leg 8. The length of the metal track 4 is 40-50 cm.

Claims

1. An improved electromagnetic induction demonstration instrument is characterized in that: a double-throw double-pole knife switch (2) is arranged at one end of a rectangular wooden bottom plate (1), a lamp holder (7) arranged at the other end of the wooden bottom plate (1) is provided with a bulb (3), two metal rails (4) which are parallel to each other are longitudinally arranged on the bottom plate (1) between the double-throw double-pole knife switch (2) and the bulb (3), annular magnets (5) which are uniformly and longitudinally arranged are arranged on the bottom plate (1) in the two metal rails (4), metal tubes (6) are transversely arranged on the metal rails (4) in a matched manner, the positive pole and the negative pole of a storage battery (9) are respectively connected with the positive pole and the negative pole of a wire inlet of the double-throw double-pole knife switch (2) through leads, the end part of one metal rail (4) at one side of the double-throw double-pole knife switch (2) is connected with a first wiring seat (10) of the double-throw double-pole knife switch (2) through leads, and the end part of the other metal rail (4) at the side is connected with, the other pole of the lamp holder (7) is connected with a second wire holder (11) of the double-throw double-pole knife switch (2) through a lead.

2. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the number of the uniformly distributed annular magnets (5) is 6, and the N levels of the annular magnets (5) face to the same direction.

3. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the double-throw double-pole knife switch (2) is a bidirectional change-over switch.

4. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the metal tube (6) is a copper tube or an aluminum tube.

5. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the height of the ring magnet (5) is lower than that of the metal track (4).

6. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the bottom surface of the wooden bottom plate (1) is provided with supporting legs (8).

7. The improved electromagnetic induction demonstration apparatus of claim 1 wherein: the length of the metal track (4) is 40-50 cm.