CN201266445Y - Electromagnetic induction demonstration instrument - Google Patents
Electromagnetic induction demonstration instrument Download PDFInfo
- Publication number
- CN201266445Y CN201266445Y CNU2008201458962U CN200820145896U CN201266445Y CN 201266445 Y CN201266445 Y CN 201266445Y CN U2008201458962 U CNU2008201458962 U CN U2008201458962U CN 200820145896 U CN200820145896 U CN 200820145896U CN 201266445 Y CN201266445 Y CN 201266445Y
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- China
- Prior art keywords
- electromagnetic induction
- demonstration instrument
- arc
- guide rail
- shaped guide
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Abstract
The utility model provides an electromagnetic induction demonstration instrument, relating to a teaching tool, in particular to an electromagnetic induction demonstration instrument. The utility model provides the electromagnetic induction demonstration instrument with strong intuition and strong interest. The electromagnetic induction demonstration instrument is provided with a base, an arc-shaped guideway, a rolling part and an electromagnetic field generation circuit; the arc-shaped guideway is fixedly arranged on the base; the rolling part is arranged on the arc-shaped guideway and matched with the arc-shaped guideway in a rolling way; the rolling part is provided with a magnet; and the electromagnetic field generation circuit is arranged in the base. The electromagnetic induction demonstration instrument can be used as the demonstration instrument matched with teaching material, is extremely intuitionistic and vivid; furthermore, the rolling part can be designed as colorful models, cartoon profiles or other artware profiles, and the like, and can be provided with acoustic and optical functions, thus increasing greater interest and necessarily bringing better teaching effect; furthermore, the electromagnetic induction demonstration instrument not only can be used as the teaching demonstration instrument, but also can be used as an ornament.
Description
Technical field
The utility model relates to a kind of teaching appliance, especially relates to a kind of electromagnetic induction demonstration instrument.
Background technology
In middle and primary schools' course, scientific knowledges such as electricity, magnetic and electromagnetic induction have been talked about, in order to cooperate the explanation of correlated knowledge point, need to be equipped with corresponding demonstrator, existing demonstrator is a kind of incessantly, but intuitive and interesting aspect desirable not enough, teaching efficiency is under some influence.
Summary of the invention
The purpose of this utility model provides strong, the interesting dense electromagnetic induction demonstration instrument of a kind of intuitive.
The utility model is provided with base, arc-shaped guide rail, rolling member and electromagnetic field generation circuit; Arc-shaped guide rail is fixedly arranged on the base, and rolling member is located on the arc-shaped guide rail and with the arc-shaped guide rail rolling and is cooperated, and rolling member is provided with magnet, and electromagnetic field generation circuit is located in the base.
Arc-shaped guide rail is that benchmark is left-right symmetric with the cross central line of base preferably, and the minimum point of arc-shaped guide rail is located at the top of the electromagnetic induction coil of electromagnetic field generation circuit.
Arc-shaped guide rail preferably is made of 2 identical and parallel guide rail plates.
Rolling member can be spheroid or toy car etc.When rolling member was spheroid, spheroid can be selected the table tennis shell for use, and table tennis spherical shell and arc-shaped guide rail roll and cooperate, and described magnet can be located on the inwall of table tennis spherical shell or to be located at the table tennis spherical shell outside and with the spherical shell rolling of rattling.When rolling member was toy car, the wheel of toy car rolled with arc-shaped guide rail and cooperates.
Electromagnetic field generation circuit preferably is provided with electromagnetic induction coil, triode and power supply, the elementary two ends of electromagnetic induction coil are connected with emitter with the base stage of triode respectively, the secondary two ends of electromagnetic induction coil are connected with the emitter of power supply and triode respectively, and power supply is preferably battery.
Electromagnetic induction coil preferably is provided with magnetic core.Magnetic core preferably is vertical placement, and the top of magnetic core is preferably over against the minimum point of arc-shaped guide rail.
Set magnet is at least 2 on the rolling member, and each magnet is in same plane and is uniform.
Principle of work of the present utility model is as follows: the eminence that rolling member is placed on arc-shaped guide rail, after loosing one's grip, rolling member rolls under the arc-shaped guide rail of the effect lower edge of gravity, when through the arc-shaped guide rail bottom, be located at the electromagnetic induction coil cutting that the magnetic line of force that magnet produced on the rolling member can be subjected to electromagnetic field generation circuit, the electromagnetic induction coil cutting magnetic line produces induction current, make the base stage of triode be in noble potential and turn-on transistor, the electric current of power supply produces induced field through electromagnetic induction coil, the magnetic pole of the induced field that produces is an identical polar with the magnetic pole of being located at the magnet on the rolling member, therefore produce the same sex phenomenon of repelling each other, just the magnet on the rolling member can be subjected to a repulsive force, after rolling member is by arc-shaped guide rail bottom minimum point in a flash, gravity inertial is not only arranged, and the magnetic pole repulsive force also brought into play useful effect simultaneously, rolling member rolled accelerate, and impacts to arc-shaped guide rail opposite side eminence.When rolling member rushes to certain altitude, because the magnet on the rolling member has been avoided electromagnetic induction coil, triode ends, electromagnetic field generation circuit disconnects, the repulsive force that acts on rolling member disappears, therefore rolling member rolls back again under the arc-shaped guide rail of the effect lower edge of gravity, circulates the sustainable circulating rolling back and forth of rolling member with this.
This shows that the utility model has related to gravity, electromagnetic induction, magnetic action power (same sex is repelled each other and there is a natural attraction between the sexes) and triode as knowledge points such as switching devices, can be used as the supporting demonstration instrument of teaching material fully.Very directly perceived, very dynamic during the utility model demonstration.And rolling member can be designed to colourful model, cartoon appearance or other handicraft appearance etc., and can mix functions such as sound, light, can increase bigger interest so, must bring better teaching efficiency.The utility model not only can be used as demonstration instrument for teaching in addition, also can be used as the decorative display product.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the side-looking structural representation of Fig. 1.
Fig. 3 is the circuit theory diagrams of the electromagnetic field generation circuit of the utility model embodiment.
Embodiment
Referring to Fig. 1 and 2, the utility model is provided with base 1, arc-shaped guide rail 2 (being made of 2 identical and parallel guide rail plates 21), table tennis spherical shell 3 and electromagnetic field generation circuit 4.Arc-shaped guide rail 2 is fixedly arranged on the base 1.Table tennis spherical shell 3 is located on the arc-shaped guide rail 2 and with arc-shaped guide rail 2 rollings and is cooperated, post 3 small magnets 31 on the inwall of table tennis spherical shell 3, in the same plane and space 120 degree of 3 small magnets 31 are that uniform (small magnet 31 also can be attached on the outside surface of table tennis spherical shell 3, or, fix small magnet 31 again in the armed lever end) by on the outside surface of table tennis spherical shell 3, establishing armed lever.Electromagnetic field generation circuit 4 is located in the base 2.Arc-shaped guide rail 2 is that benchmark is left-right symmetric with the cross central line of base 1, the most approaching electromagnetic field generation circuit of being located in the base 14 of the minimum point of arc-shaped guide rail 2 (i.e. the point midway of line between the minimum point 211 of 2 guide rail plates 21).
Referring to Fig. 3, electromagnetic field generation circuit 4 is provided with the elementary L1 of electromagnetic induction coil, switch triode T, the secondary L2 of magnetic field induction coil and battery V.The two ends of the elementary L1 of electromagnetic induction coil are connected with emitter with the base stage of switch triode T respectively, the two ends of the secondary L2 of electromagnetic induction coil are connected with the negative pole of battery V and the emitter of switch triode T respectively, and the collector of switch triode T is connected with the positive pole of battery V.Elementary L1 of electromagnetic induction coil and the secondary L2 of electromagnetic induction coil are provided with same magnetic core stick (not drawing among the figure).Magnetic core stick is vertical configuration, and the upper end of magnetic core stick is over against the minimum point (i.e. the point midway of line between the minimum point 211 of 2 guide rail plates 21) of arc-shaped guide rail 2.
Claims (9)
1, electromagnetic induction demonstration instrument is characterized in that being provided with base, arc-shaped guide rail, rolling member and electromagnetic field generation circuit; Arc-shaped guide rail is fixedly arranged on the base, and rolling member is located on the arc-shaped guide rail and with the arc-shaped guide rail rolling and is cooperated, and rolling member is provided with magnet, and electromagnetic field generation circuit is located in the base.
2, electromagnetic induction demonstration instrument as claimed in claim 1 is characterized in that arc-shaped guide rail is that benchmark is left-right symmetric with the cross central line of base, and the minimum point of arc-shaped guide rail is located at the top of the electromagnetic induction coil of electromagnetic field generation circuit.
3, electromagnetic induction demonstration instrument as claimed in claim 1 is characterized in that arc-shaped guide rail is made of 2 identical and parallel guide rail plates.
4, electromagnetic induction demonstration instrument as claimed in claim 1 is characterized in that rolling member is a spheroid.
5, electromagnetic induction demonstration instrument as claimed in claim 4 is characterized in that spheroid is the table tennis spherical shell, and described magnet is located on the inwall of table tennis spherical shell or to be located at the table tennis spherical shell outside and roll with the table tennis spherical shell.
6, electromagnetic induction demonstration instrument as claimed in claim 1, it is characterized in that electromagnetic field generation circuit is provided with electromagnetic induction coil, triode and power supply, the elementary two ends of electromagnetic induction coil are connected with emitter with the base stage of triode respectively, and the secondary two ends of electromagnetic induction coil are connected with the emitter of power supply and triode respectively.
7, electromagnetic induction demonstration instrument as claimed in claim 6 is characterized in that electromagnetic induction coil is provided with magnetic core.
8, electromagnetic induction demonstration instrument as claimed in claim 7 is characterized in that magnetic core is vertical placement, and the top of magnetic core is over against the minimum point of arc-shaped guide rail.
9, as claim 1 or 4 described electromagnetic induction demonstration instrument, it is characterized in that set magnet is at least 2 on the rolling member, each magnet is in the same plane and be uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201458962U CN201266445Y (en) | 2008-10-14 | 2008-10-14 | Electromagnetic induction demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201458962U CN201266445Y (en) | 2008-10-14 | 2008-10-14 | Electromagnetic induction demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266445Y true CN201266445Y (en) | 2009-07-01 |
Family
ID=40832819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201458962U Expired - Fee Related CN201266445Y (en) | 2008-10-14 | 2008-10-14 | Electromagnetic induction demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201266445Y (en) |
-
2008
- 2008-10-14 CN CNU2008201458962U patent/CN201266445Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20101014 |