CN215007143U

CN215007143U - Junior middle school physics electricity and magnetism comprehensive teaching aid

Info

Publication number: CN215007143U
Application number: CN202121345748.7U
Authority: CN
Inventors: 安思绪
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-12-03
Anticipated expiration: 2031-06-17

Abstract

The utility model belongs to junior high school physics teaching aid field, concretely relates to junior high school physics electricity and magnetism synthesize teaching aid, include: a magnetic field frame and an auxiliary element; the magnetic field frame comprises a base, a track and a sliding block, wherein the track is perpendicular to the base, the sliding block is movably connected with the track, and the base and the sliding block are respectively provided with two opposite magnets with the same size; the upper surface of the base is also provided with a connecting hole which is used for connecting an auxiliary element. The relationship between the distance between the two magnetic poles and the strength of the generated magnetic field can be demonstrated through the magnetic field frame with the variable magnetic pole distance; can select different auxiliary elements to assemble this teaching aid according to the progress of course and the experiment demand of difference during the teaching, accomplish the electromagnetism experiment that needs.

Description

Junior middle school physics electricity and magnetism comprehensive teaching aid

Technical Field

The utility model belongs to junior middle school physics teaching aid field, concretely relates to junior middle school physics electricity and magnetism synthesize teaching aid.

Background

Physics is the subject of studying the general laws of motion and the basic structure of a substance. As a basic subject of natural science, physics studies the most basic motion forms and laws of all substances, including universes and basic particles, and thus becomes the basis of research in other natural science subjects. The theoretical structure of the system fully uses mathematics as the working language of the system, uses experiments as the only standard for checking the correctness of the theory, and is the most precise natural science subject at present

Junior middle school physics is as student's physics enlightenment educational material, has vital effect to the guide of student to the interest of physics, and students often carry out the physics experiment through oneself hands, increases the interest to the physics experiment, and the electric that involves in junior middle school physics teaching material and the content of magnetism are the basis and the enlightenment of electromagnetism, need understand principle wherein through teaching demonstration and student hands-on experiment help student, consequently need a teaching aid for the demonstration.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric and magnetic comprehensive teaching aid in junior middle school physics, which can demonstrate that like poles of magnets repel each other and opposite poles attract each other; magnetic effects of the current; the electromagnetic induction phenomenon and the like.

The utility model discloses a realize through following technical scheme:

a junior middle school physics electricity and magnetism synthesizes teaching aid includes: a magnetic field frame and an auxiliary element;

the magnetic field frame comprises a base, a track and a slide block,

the track is perpendicular to the base, the slide block is movably connected with the track,

two opposite magnets with the same size are respectively arranged on the base and the sliding block;

the upper surface of the base is also provided with a connecting hole which is used for connecting the auxiliary element.

Further, the rail comprises a T-shaped slide way and a fastening through hole, and the fastening through hole is used for fastening the sliding block.

Further, the slider includes sliding part and magnet seat, the sliding part nestification in T type slide, one side of sliding part is provided with fastening bolt, fastening bolt passes fastening hole, the opposite side of sliding part is provided with the magnet seat.

Furthermore, the magnet on the base and the magnet seat on the sliding block are arranged oppositely, the S-pole magnet is arranged on the base, the N-pole magnet is arranged on the sliding block, and the distance between the N-pole magnet and the S-pole magnet can be changed by moving the sliding block.

Further, the auxiliary element includes a small magnetic needle disposed between the N-pole magnet and the S-pole magnet.

Further, the auxiliary element comprises U-shaped frames, the U-shaped frames are arranged in the connecting holes in the base, the two U-shaped frames are arranged side by side, and movable cross rods are arranged on the U-shaped frames.

Further, the auxiliary element comprises an H-shaped support and a coil, the H-shaped support is arranged in the connecting hole in the base, and the coil is movably connected with the H-shaped support.

The utility model has the advantages that: the relationship between the distance between the two magnetic poles and the strength of the generated magnetic field can be demonstrated through the magnetic field frame with the variable magnetic pole distance; different auxiliary elements are matched with the magnetic field frame, different experiments can be demonstrated, the U-shaped frame and the cross rod can demonstrate the magnetic effect of current, and the H-shaped frame and the coil can demonstrate the principle of a generator and a motor; the magnetic needle can demonstrate the rule that like poles repel and opposite poles attract magnets; can assemble this teaching aid according to the progress of course and the experiment demand of difference during the teaching, accomplish the electromagnetism experiment that needs.

Drawings

Fig. 1 is a schematic view of the magnetic field frame of the present invention;

FIG. 2 is a schematic view of the magnetic field frame of the present invention;

fig. 3 is a schematic view of the slider of the present invention;

fig. 4 is a schematic view of a first embodiment of the present invention;

fig. 5 is a schematic view of a second embodiment of the present invention;

fig. 6 is a schematic view of a third embodiment of the present invention;

in the figure: 1. a base; 2. a track; 3. a slider; 4. an S-pole magnet; 5. an N-pole magnet; 6. a T-shaped slideway; 7. fastening through holes; 8. a sliding part; 9. a magnet holder; 10. fastening a bolt; 11. a magnetic needle; 12. a U-shaped frame; 13. a cross bar; 14. an H-shaped bracket; 15. and a coil.

Detailed Description

As shown in fig. 1: the utility model discloses well magnetic field frame includes base 1, track 2 and slider 3, and base 1 is the cuboid, and track 2 is located base 1' S back edge department and is located the middle part of back edge, and track 2 perpendicular to base 1 sets up to with 1 fixed connection of base,

slider

3 and 2 swing joint of track, 1 upper surface of base still is provided with the connecting hole, and the position that lies in under slider 3 on the base 1 is provided with S utmost point magnet 4, is provided with the N utmost point magnet 5 the same with S utmost point magnet 4 size on the slider 3.

The rail 2 comprises a T-shaped slide 6 and a fastening through hole 7, and the fastening through hole 7 is a groove-shaped through hole arranged on one side of the rail 2 and used for fastening the sliding block 3.

As shown in fig. 3: the slider 3 includes sliding part 8 and magnet seat 9, and sliding part 8 nestification is in T type slide 6, and one side of sliding part 8 is provided with fastening bolt 10, and fastening bolt 10 passes fastening hole 7, and the opposite side of sliding part 8 is provided with magnet seat 9, is provided with N utmost point magnet 5 on the magnet seat 9. The distance between the N-pole magnet 5 and the S-pole magnet 4 can be changed by moving the slider 3.

The first to third embodiments share the same magnetic field frame, and the difference is that the used auxiliary elements are different, so as to demonstrate different experiments.

Example one

As shown in fig. 4: the auxiliary element is a magnetic needle 11, two cuboid strong magnets are placed on an aluminum magnetic field frame with the magnet distance being changeable, the N-pole magnet 5 and the S-pole magnet 4 are oppositely arranged, and the magnetic needle 11 is placed in the magnetic field. The magnetic needle 11 can be vertically erected between the two magnets, so that the unlike magnetic poles attract each other; the magnetic needle 11 can not stand on the magnetic surface by rotating the magnetic needle 11 by 180 degrees, which shows that the like magnetic poles repel each other.

And by sliding the slider 3, the relationship between the strength of the magnetic field and the distance of the magnet can be demonstrated.

Example two

As shown in fig. 5: the auxiliary element comprises U-shaped frames 12, the two U-shaped frames 12 are arranged in parallel in a connecting hole on the base 1, movable cross rods 13 are arranged on the U-shaped frames 12, the cross rods 13 are placed on the U-shaped frames 12 and can freely roll, and the U-shaped frames 12 and the cross rods 13 are made of conductive materials.

The power supply is connected on the two U-shaped frames 12 to form a closed loop circuit of the power supply, namely the U-shaped frame 12, the cross bar 13, the U-shaped frame 12 and the power supply, so that the magnetic effect of current can be demonstrated, namely the force applied to the electrified lead in a magnetic field.

When the cross rod 13 does cutting magnetic induction line motion along the U-shaped frame 12, the two ends of the cross rod 13 are connected with the ammeter, the number displayed by the ammeter is changed, and the electromagnetic induction phenomenon can be demonstrated.

EXAMPLE III

As shown in fig. 6: the auxiliary element comprises an H-shaped support 14 and a coil 15, the H-shaped support 14 is arranged in a connecting hole on the base 1, the coil 15 is movably connected with the H-shaped support 14 through a central shaft, and the coil 15 is arranged between the N-pole magnet 5 and the S-pole magnet 4.

Applying power on the middle shaft to rotate the coil 15, so that the principle of the generator can be demonstrated;

the principle of the motor can be demonstrated by additionally arranging a commutator on the coil 15 and connecting a direct current power supply.

Claims

1. The utility model provides a teaching aid is synthesized to physics electricity and magnetism in junior middle school which characterized in that includes: a magnetic field frame and an auxiliary element;

the magnetic field frame comprises a base (1), a track (2) and a slide block (3),

the track (2) is perpendicular to the base (1), the sliding block (3) is movably connected with the track (2),

two opposite magnets with the same size are respectively arranged on the base (1) and the sliding block (3);

the upper surface of the base (1) is also provided with a connecting hole, and the connecting hole is used for connecting the auxiliary element.

2. A comprehensive teaching aid of physics in junior middle school as claimed in claim 1, characterized in that the track (2) comprises a T-shaped slideway (6) and a fastening through hole (7), the fastening through hole (7) is used for fastening the slide block (3).

3. A junior middle school physics electricity and magnetism comprehensive teaching aid as claimed in claim 2, characterized in that slider (3) includes sliding part (8) and magnet seat (9), sliding part (8) nest in T type slide (6), one side of sliding part (8) is provided with fastening bolt (10), fastening bolt (10) pass fastening through hole (7), the other side of sliding part (8) is provided with magnet seat (9).

4. A junior middle school physics electricity and magnetism comprehensive teaching aid as claimed in claim 3, characterized in that base (1) is provided with S pole magnet (4), slider (3) is provided with N pole magnet (5), and S pole magnet (4) and N pole magnet (5) are arranged oppositely.

5. A Junior middle school physics electricity and magnetism comprehensive teaching aid as claimed in claim 4, characterized in that, the auxiliary component includes little magnet needle (11), little magnet needle (11) set up in between N pole magnet (5) and S pole magnet (4).

6. A Junior middle school physics electricity and magnetism comprehensive teaching aid as claimed in claim 4, characterized in that auxiliary component includes U type frame (12), U type frame (12) set up in the connecting hole on base (1), U type frame (12) set up two side by side, be provided with movable horizontal pole (13) on U type frame (12).

7. A comprehensive teaching aid of physics electricity and magnetism in junior middle school according to claim 4, characterized in that said auxiliary component includes H-shaped support (14) and coil (15), said H-shaped support (14) is set up in said attachment hole on said base (1), said coil (15) and said H-shaped support (14) swing joint.