Demonstration teaching aid for electromagnetism teaching

Abstract

The utility model relates to the technical field of teaching aids, and particularly discloses a demonstration teaching aid for electromagnetism teaching, a switch and an ampere meter are respectively fixed at the front part and the rear part of one side of the bottom surface of an inner cavity of a bottom box, a horseshoe-shaped magnet is fixed at the front part of the other side of the bottom surface of the inner cavity of the bottom box, the bottom end of a top cover is hinged at the rear side of the top end of the bottom box, and the top surface of the top cover is provided with a lifting ring. The supporting plate is vertically fixed to the position, located on the rear side of the horseshoe-shaped magnet, of the bottom face of the inner cavity of the bottom box, a hole is formed in the middle of the supporting plate, and the operating piece comprises a sliding block horizontally sliding along the rear wall of the supporting plate, a vertical rod slidably clamped to the rear wall of the sliding block in the vertical direction and a threaded sleeve fixed to the bottom end of the front wall of the vertical rod and matched with the rear end of the conductor in a sleeving mode. The lock catch is arranged at the bottom end of the bottom box front wall and used for fixing the top front end of the top cover; the problem that electromagnetic demonstration experiment equipment is inconvenient to store and carry is well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a demonstration teaching aid for electromagnetism teaching. Background Art

[0002] Electromagnetism is a branch of physics that studies the interaction between electric and magnetic fields, as well as their laws and applications. Electromagnetic induction is one of the principles of electromagnetism. It means that a conductor placed in a changing magnetic flux will generate an electromotive force, which is called an induced electromotive force or induced electromotive force. If the conductor is closed into a loop, the electromotive force will drive electrons to flow, forming an induced current. The discovery of electromagnetic induction is one of the greatest achievements in the field of electromagnetism. It not only reveals the intrinsic connection between electricity and magnetism, but also lays an experimental foundation for the mutual transformation between electricity and magnetism.

[0003] Among them, electromagnetism is also one of the most important contents in middle school physics. In order to facilitate students to quickly understand physical concepts during physics teaching, physical experiments are often required. Through physical experiments, abstract and complex principles are intuitively presented to students, especially experimental demonstrations of electromagnetic theoretical knowledge, which can not only increase students' interest, but also facilitate their understanding.

[0004] However, among the existing experimental equipment, the equipment used for electromagnetic induction experiments generally includes a bracket, a conductor, a sensitive ammeter, a switch, a horseshoe magnet, and a plurality of wires. The equipment is too large and inconvenient to store and carry. Utility Model Content

[0005] The utility model aims to solve the problem that the electromagnetic demonstration experimental equipment in the prior art is inconvenient to store and carry, and designs a demonstration teaching aid for electromagnetic teaching.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a demonstration teaching aid for electromagnetic teaching, comprising an ammeter, a switch, a horseshoe magnet, a conductor and a wire for connecting the ammeter, the switch, the horseshoe magnet and the conductor in series, the switch and the ammeter are respectively fixed to the front and rear parts of one side of the bottom surface of the inner cavity of the bottom box, the horseshoe magnet is fixed to the front part of the other side of the bottom surface of the inner cavity of the bottom box, the bottom end of the top cover is hinged to the rear side of the top end of the bottom box, the top surface of the top cover is provided with a lifting ring, the support plate is vertically fixed to the position of the bottom surface of the inner cavity of the bottom box located behind the horseshoe magnet, the middle part of the support plate is provided with a hole, the operating member comprises a slider that slides horizontally along the rear wall of the support plate, a vertical rod that slides vertically and is clamped to the rear wall of the slider, and a threaded sleeve that is fixed to the bottom end of the front wall of the vertical rod and is sleeved and matched with the rear end of the conductor, and the lock is arranged at the bottom end of the front wall of the bottom box and is used to fix the top front end of the top cover.

[0007] Preferably, a horizontal slide rail is provided on the top of the rear wall of the support plate, a horizontal slide groove is provided on the front wall of the slider for sliding and snap-fitting with the horizontal slide rail, a vertical slide groove is provided on the rear wall of the slider, and a vertical slide rail is provided in the middle of the front wall of the vertical rod for sliding and snap-fitting with the vertical slide groove.

[0008] Preferably, a pulling head is rotatably sleeved on the top surface of the vertical rod, and a limiting plate is fixedly sleeved on the bottom end of the pulling head.

[0009] Preferably, the front and rear ends of the conductor are fixedly connected with screws respectively, the screw at the rear end is threadedly sleeved in the threaded sleeve, and a nut is threadedly sleeved on the screw at the front end.

[0010] Preferably, a folding plate is provided at the bottom end of the support plate, and the folding plate is fixed to the bottom surface of the inner cavity of the bottom box by screws.

[0011] Preferably, the lock includes a rotating shaft rotatably sleeved on the bottom of the front wall of the bottom box near both ends and an oblong knob integrally formed at the front end of the rotating shaft, and oblong lock holes matching the oblong knob are respectively provided near both sides of the top front end of the top cover.

[0012] Preferably, the top of the front wall of the bottom box is an open structure, and the front parts of the two side walls of the bottom box are chamfered structures.

[0013] Preferably, it also includes a fixing clamp ring for fixing the bottom end of the horseshoe-shaped magnet to the bottom surface of the inner cavity of the bottom box.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The demonstration teaching aid for electromagnetic teaching involved in the utility model can conveniently store the equipment used in the electromagnetic induction experiment in the bottom box, so that the experimental equipment is easy to store and carry; in addition, the bottom box can also be used as a supporting platform for the experimental equipment, and the top cover can be opened to flexibly and conveniently perform experimental operations, so it is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the conductor of the utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the support plate of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the operating part of the utility model.

[0020] In the figure: 1- ammeter;

[0021] 2- Switch;

[0022] 3- Horseshoe magnet;

[0023] 4-conductor; 4.1-screw; 4.2-nut;

[0024] 5- bottom box;

[0025] 6-top cover; 6.1-lifting ring; 6.2-long round lock hole;

[0026] 7-support plate; 7.1-hole; 7.2-horizontal slide rail; 7.3-folding plate;

[0027] 8-operating part; 8.1-slider; 8.1.1-horizontal slide; 8.1.2-vertical slide; 8.2-vertical rod; 8.2.1-vertical slide rail; 8.3-threaded sleeve; 8.4-lifting head; 8.5-limiting plate;

[0028] 9-lock buckle; 9.1-rotating shaft; 9.2-long round knob;

[0029] 10-Secure the snap ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-4 The utility model provides a technical solution for a demonstration teaching aid for electromagnetism teaching, comprising an ammeter 1, a switch 2, a horseshoe magnet 3, a conductor 4, and a wire for connecting the ammeter 1, the switch 2, the horseshoe magnet 3 and the conductor 4 in series.

[0032] The switch 2 and the ammeter 1 are fixed to the front and rear parts of one side of the bottom surface of the inner cavity of the bottom box 5 by screws, respectively, and the horseshoe magnet 3 is fixed to the front part of the other side of the bottom surface of the inner cavity of the bottom box 5 by a fixing clamp 10 and screws. In order to facilitate operation and observation of experimental results, the top of the front wall of the bottom box 5 is an open structure, and the front parts of the two side walls of the bottom box 5 are chamfered structures.

[0033] The front and rear ends of the conductor 4 are fixedly connected with screw rods 4.1, wherein a nut 4.2 is threadedly sleeved on the screw rod 4.1 at the front end.

[0034] The bottom end of the top cover 6 is hinged to the rear side of the top end of the bottom box 5, and a lifting ring 6.1 is provided on the top surface of the top cover 6.

[0035] The lock buckle 9 is arranged at the bottom end of the front wall of the bottom box 5 and is used to fix the top front end of the top cover 6. The lock buckle 9 includes a rotating shaft 9.1 that is rotatably sleeved on the bottom of the front wall of the bottom box 5 near the two ends and an oblong knob 9.2 that is integrally formed at the front end of the rotating shaft 9.1. The top front end of the top cover 6 is provided with oblong lock holes 6.2 that are matched with the oblong knob 9.2 at the positions near the two sides. When the top cover 6 is snapped on the bottom box 5, the oblong lock hole 6.2 just passes through the oblong knob 9.2, and then the oblong knob 9.2 is rotated 90° to lock the top cover 6 on the bottom box 5; when the top cover 6 needs to be opened, it only needs to rotate the oblong knob 9.2 so that the outline of the oblong knob 9.2 is just opposite to the oblong lock hole 6.2, and then the top cover 6 can be flipped up.

[0036] The support plate 7 is vertically fixed to the bottom surface of the inner cavity of the bottom box 5 at the rear side of the horseshoe magnet 3, and a hole 7.1 is provided in the middle of the support plate 7, wherein a folding plate 7.3 is provided at the bottom end of the support plate 7, and the folding plate 7.3 is fixed to the bottom surface of the inner cavity of the bottom box 5 with screws. A horizontal slide rail 7.2 is provided at the top of the rear wall of the support plate 7.

[0037] The operating member 8 comprises a slider 8.1 that slides horizontally along the rear wall of the support plate 7, a vertical rod 8.2 that slides vertically and is clamped to the rear wall of the slider 8.1, and a threaded sleeve 8.3 that is fixed to the bottom end of the front wall of the vertical rod 8.2 and is sleeved and matched with the screw rod 4.1 at the rear end of the conductor 4. Among them, the front wall of the slider 8.1 is provided with a horizontal slide groove 8.1.1 that is slidably clamped and matched with the horizontal slide rail 7.2, the rear wall of the slider 8.1 is provided with a vertical slide groove 8.1.2, and the middle part of the front wall of the vertical rod 8.2 is provided with a vertical slide rail 8.2.1 that is slidably clamped and matched with the vertical slide groove 8.1.2. A lifting head 8.4 is rotatably sleeved on the top surface of the vertical rod 8.2, and a limit plate 8.5 is fixedly sleeved on the bottom end of the lifting head 8.4.

[0038] In summary, when the screw rod 4.1 at the rear end of the conductor 4 is screwed onto the threaded sleeve 8.3, the joint of the wire can be clamped, and when the nut 4.2 is tightened onto the screw rod 4.1 at the front end of the conductor 4, the front end of the conductor 4 can be crimped onto the wire.

[0039] When conducting electromagnetic induction related experiments, the lifting head 8.4 is rotated so that the limit plate 8.5 is supported on the top surface of the slider 8.1. At this time, the slider 8.1 and the vertical rod 8.2 can be moved horizontally as a whole, so that the threaded sleeve 8.3 drives the conductor 4 to cut the magnetic flux lines of the horseshoe magnet 3 in the horizontal direction. The change in the deflection direction of the pointer of the ammeter 1 can be observed by changing the direction of the horizontal movement.

[0040] Rotate the lifting head 8.4 to rotate the limit plate 8.5 by 90°. At this time, you can lift the vertical rod 8.2 vertically to drive the conductor 4 to move in a direction parallel to the magnetic flux lines of the horseshoe magnet 3, and then observe the deflection of the pointer on the ammeter 1. You can also move the slider 8.1 horizontally and the vertical lifting rod 8.2 vertically at the same time to experiment with the phenomenon that the conductor 4 cuts the magnetic flux lines of the horseshoe magnet 3 in an inclined direction.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A demonstration teaching aid for teaching electromagnetism, comprising an ammeter (1), a switch (2), a horseshoe magnet (3), a conductor (4), and a wire for connecting the ammeter (1), the switch (2), the horseshoe magnet (3) and the conductor (4) in series, characterized in that: Also includes: A bottom box (5), the switch (2) and the ammeter (1) are respectively fixed to the front and rear parts of one side of the bottom surface of the inner cavity of the bottom box (5), and the horseshoe magnet (3) is fixed to the front part of the other side of the bottom surface of the inner cavity of the bottom box (5); A top cover (6), the bottom end of the top cover (6) is hinged to the rear side of the top end of the bottom box (5), and a lifting ring (6.1) is provided on the top surface of the top cover (6); A support plate (7), the support plate (7) being vertically fixed to the bottom surface of the inner cavity of the bottom box (5) and located at a position behind the horseshoe magnet (3), and a hole (7.1) is provided in the middle of the support plate (7); An operating member (8), the operating member (8) comprising a slider (8.1) that slides horizontally along the rear wall of the support plate (7), a vertical rod (8.2) that slides vertically and is clamped to the rear wall of the slider (8.1), and a threaded sleeve (8.3) that is fixed to the bottom end of the front wall of the vertical rod (8.2) and is sleeved and matched with the rear end of the conductor (4); A lock buckle (9), the lock buckle (9) is arranged at the bottom end of the front wall of the bottom box (5) and is used to fix the top front end of the top cover (6).

2. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: A horizontal slide rail (7.2) is provided on the top of the rear wall of the support plate (7), and a horizontal slide groove (8.1) is provided on the front wall of the slide block (8.1) for sliding engagement with the horizontal slide rail (7.2). 8.1.1), a vertical slide groove (8.1.2) is provided on the rear wall of the slider (8.1), and a vertical slide rail (8.2.1) which is slidably engaged and matched with the vertical slide groove (8.1.2) is provided in the middle of the front wall of the vertical rod (8.2).

3. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: A lifting head (8.4) is rotatably sleeved on the top surface of the vertical rod (8.2), and a limiting plate (8.5) is fixedly sleeved on the bottom end of the lifting head (8.4).

4. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: The front and rear ends of the conductor (4) are respectively fixedly connected with screw rods (4.1), the screw rod (4.1) at the rear end is threadedly sleeved in the threaded sleeve (8.3), and the screw rod (4.1) at the front end is threadedly sleeved with a nut (4.2).

5. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: A folding plate (7.3) is provided at the bottom end of the support plate (7), and the folding plate (7.3) is fixed to the bottom surface of the inner cavity of the bottom box (5) by means of screws.

6. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: The lock buckle (9) comprises a rotating shaft (9.1) rotatably sleeved on the bottom of the front wall of the bottom box (5) near both ends, and an oblong knob (9.2) integrally formed at the front end of the rotating shaft (9.1); and oblong lock holes (6.2) are respectively provided at the front end of the top cover (6) near both sides and are matched with the oblong knob (9.2) for buckling.

7. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: The top of the front wall of the bottom box (5) is an open structure, and the front parts of the two side walls of the bottom box (5) are chamfered structures.

8. The demonstration teaching aid for electromagnetism teaching according to claim 1, characterized in that: It also includes a fixing clamp ring (10) for fixing the bottom end of the horseshoe-shaped magnet (3) to the bottom surface of the inner cavity of the bottom box (5).

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