CN2545662Y - Junior middle school electricity leaching aid - Google Patents

Abstract

An electricity analysis-aid device used in a junior high school relates to the teaching field of physics of the junior high school, consisting of a plane relationship diagram board, an indicator light breadboard, a light-insulation frame and a pedestal. The plane relationship diagram of resistance, voltage, electric current and electric power that are connected in series and parallel circuit is arranged on the surface of the plane relationship diagram board. The indicator light breadboard positioned below the plane relationship diagram board is provided with indicator lights with three colors that correspond to different physical quantity. The different-colored light represents the known value, the obtained value or the wanted value of the physical quantity for a problem.

Description

Junior middle school's electricity leaching aid

The utility model relates to the junior middle school physics teaching field.

Contact between each physical quantity of junior physics electricity part is intricate, many students are when the application topic of answer this respect, feel to have no way of doing it, the phenomenon of formula of muddling things up that occurs fastening one person's story upon another person does not also have a kind ofly can express the instrument of getting in touch between each physical quantity of electricity more intuitively at present.

The purpose of this utility model designs a kind of contact between each physical quantity can being shown intuitively, and with different signals express respectively each physical quantity to ask in the exercise question of doing be known quantity, the centre amount of obtaining, or the target amount of asking; Thereby the starting point, target and the solution path that make exercise question all become very clear.

Junior middle school's electricity leaching aid comprises plane contact chart board, indicator light wire board, light isolating frame and base four parts.Plane contact chart board is made by translucent thin plate, on the surface of thin plate, is decorated with the contact figure between junior middle school's electricity physical quantity.Contact figure by two pure resistance electrical appliance institute forming circuits, be seven lines formations by " three horizontal ones and four vertical ones ", every ordinate is connected with R, U, four letters of I, P from top to bottom, represent the contact between the resistance R, voltage U, electric current I, electrical power P on the same section circuit, wherein four letters on article one ordinate all have subscript " always ", the expression total amount; Four letters on the second ordinate all have subscript " 1 ", represent each physical quantity corresponding with first electrical appliance; Article three, four letters on the ordinate all have subscript " 2 ", expression and second each physical quantity that electrical appliance is corresponding.Four horizontal lines connect together letter identical on the different ordinates, the left end of the horizontal line that is linked to be at three " U " connects " parallel connection " two words again, the left end of the horizontal line that is linked to be at three " I " connects " series connection " two words again, and each horizontal line is represented the relation of total amount and each component in the series parallel circuits.No matter series connection or in parallel, each physical quantity (physical quantity is also regarded in " parallel connection ", " series connection " in this is known as) on every line, as long as know (or for " known " or " obtained ") two, just can obtain that other are several, i.e. " line " calmly at 2.14 groups of pilot lamp are installed on indicator light wire board, correspond respectively to each physical quantity on the plane contact chart board, except that the pilot lamp corresponding to " series connection " and " parallel connection " is with (only expression " known ") a kind of color, form by red, yellow, green three different colours pilot lamp for other 12 groups, every pilot lamp is all separately by a switch control.Light isolating frame is made of lighttight material, and its effect is to guarantee that the pilot lamp under each letter only illuminates this letter, and each alphabetical state indication is independent of each other.Base is made in order to install and fix above each several part.

Using method one: with the ask known quantity of doing exercise question with wait that the amount of asking uses the light of different colours to mark respectively in " leaching aid "; At first find out " line " that contain two known points,, move towards target step by step along feasible it " line " by the rule of " 2 fixed lines ".Using method two: if can not find " 2 points that determine a line ", can suppose that " target " is known quantity,,, go on along feasible line, up to getting back to target along another line again by the rule of " 2 fixed lines " from " target "; Just walk one and contain the closed loop of waiting the amount of asking.Be equivalent with arbitrary " must through amount " in the closed loop so, list to contain remaining the equation of the amount of asking, can solve amount to be asked.Using method three: there are two or more different circuit in some electricity exercise question, this just need be used by plural " leaching aid " combination, contact in " contact figure " is not only arranged, " contact figure " in addition that has and the contact between " contact figure " between each physical quantity." the contact hole " of the amount of interrelating links to each other between the contact bundle of lines leaching aid that has plug with two ends and the leaching aid, the amount that links to each other, as long as obtain in a leaching aid, just becoming in another leaching aid so can the amount of obtaining.

This leaching aid simple structure, easy to use, promptly can be used as learning aid and also can be used as the teaching aid use.

Accompanying drawing shows the structural representation of the embodiment of electricity leaching aid of this junior middle school.Wherein:

Fig. 1 is the front view of junior middle school's electricity leaching aid;

Fig. 2 is junior middle school's electricity leaching aid structure assembling section;

Fig. 3 is the rear view of plane contact chart board;

Fig. 4 is the longitudinal section of plane contact chart board;

Fig. 5 is the front view of light isolating frame;

Fig. 6 is the front view of wiring board;

Fig. 7 is indicator light circuit figure;

Fig. 8 is the front view of base;

Fig. 9 is the longitudinal diagram of base;

Figure 10 is the contact plugging chart;

Figure 11 is the front view of another " leaching aid ";

In this embodiment, junior middle school electricity leaching aid comprises plane contact chart board (1), indicator light wire board (4), light isolating frame (2) and base (5) four parts of band edge frame.Plane contact chart board (1) is made by translucent material, and the contact figure of each physical quantity of electricity is decorated with on its surface.And leave switch mounting hole (6), contact jack (7), below each switch mounting hole, indicated the indication information of the pilot lamp that this switch is controlled with Chinese character.Leave a plurality of fixing threaded holes (8) around the back side.Light isolating frame (2) is made by opaque material, and on horizontal frame, leave with the plane and get in touch corresponding switch mounting hole of chart board (1) (6) and contact jack (7), and battery case hole (9).Wiring board (4) is to weld by circuit diagram shown in Figure 7, and wherein the size of resistance (11) is by the working current and the supply voltage decision of light emitting diode (3), and the position of switch (10) and light emitting diode (3) as shown in Figure 6.Have only a green light emitting diode corresponding under " series connection " on the plane contact chart board (1) and " in parallel ", corresponding other alphabetically descends all to have green, yellow, red three light emitting diodes.The front elevation of base (5) leaves several fixing threaded holes (8) as shown in Figure 8 around it, be respectively applied for fixedly indicator light wire board (4), plane contact chart board (1).During assembling, earlier indicator light wire board (4) is fixed in the base, light isolating frame (2) correspondence is installed on the indicator light wire board (4) again, the plane contact chart board (1) with the band edge frame gets final product by dress is fixing at last.When two leaching aids of need are used in combination, available contact plug wire shown in Figure 10 is connected leaching aid shown in Figure 1 with the amount of contact of leaching aid shown in Figure 11, distinguished for each physical quantity that makes leaching aid shown in Figure 11 and leaching aid shown in Figure 1, on each physical quantity of leaching aid shown in Figure 11, all added " ' ".

In the present embodiment, for the easy to operate telepilot that installs additional; In order to strengthen the result of use of instrument, can install sound and flasher additional, can also the Applied Digital circuit install the circuit arrangement that automatic demonstration can the amount of obtaining additional.

Claims (3)

1, junior middle school electricity leaching aid comprises plane contact chart board (1), indicator light wire board (4), light isolating frame (2) and base (5) four parts; It is characterized in that, be provided with the plane contact figure between electric current, voltage, resistance, each physical quantity of electric power on the surface of translucent plane contact chart board (1), be used for representing the contact in circuit between above-mentioned each physical quantity; On indicator light wire board (4), corresponding to the bottom surface of each physical quantity the pilot lamp of three kinds of colors has been installed all, with the light of different colours represent respectively this physical quantity ask in the exercise question of doing be known quantity, target institute's amount of asking or in the middle of the amount of obtaining.

2, according to claim 1, with the light representation physical quantity of different colours ask in the exercise question of doing be known quantity, target institute's amount of asking or in the middle of during the amount of obtaining, the light on and off of lamp are controlled by the dress telepilot that can add; Also can set up digital circuit to realize the automatic demonstration of the amount of obtaining.

3, the light representation physical quantity with different colours according to claim 1 ask in the exercise question of doing when being known quantity, the centre amount of obtaining or the target institute amount of asking, can set up circuit such as flash of light, sound simultaneously.

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