CN204680279U

CN204680279U - A kind of H. C. Oersted Experiment demonstration board

Info

Publication number: CN204680279U
Application number: CN201520271731.XU
Authority: CN
Inventors: 张悦
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-29
Filing date: 2015-04-29
Publication date: 2015-09-30
Anticipated expiration: 2025-04-29

Abstract

A kind of H. C. Oersted Experiment demonstration board, include substrate (2), described substrate (2) is provided with the rectangular circuit be connected to form in turn by battery case (1), straight wire (3), breaker (5), slide rheostat (6); The upper and lower side frame of described rectangular circuit arranges by straight wire (3) and forms, and the left and right side frame of described rectangular circuit is arranged formed by battery case (1) and breaker (5), slide rheostat (6); The below of the straight wire (3) on described upper and lower side frame is also respectively provided with a needle (4).The utility model is easy and simple to handle, good demonstration effect, diverse in function, can easily contrast the relation of electric current with electromagnetism, can help the knowwhy of circuit in Students ' Learning physics, and can well combine with practice, and integral manufacturing cost is lower, is easy to spread.

Description

A kind of H. C. Oersted Experiment demonstration board

Technical field

The utility model relates to a kind of physics aided education learning device, is specifically related to a kind of H. C. Oersted Experiment demonstration board.

Background technology

H. C. Oersted Experiment is the Key Experiment of students ' understanding current induced magnetic field, and allowing each student do it yourself and one do this experiment, is very necessary to the essence of students ' understanding magnetic phenomenon.But all adopt teacher's lecture experiment in teaching domestic at present, and be not applicable to the equipment of student experiment in group, student cannot test personally.The method of existing lecture experiment is: first want connecting circuit, then wire is curved " п " shape, its straight line portion is placed on directly over small magnetic needle that on appropriate location, (distance between the two can not be too large again, again can not be too little), require that rectilinear wire is parallel with small magnetic needle, most relief wire contacts with a pole of power supply (duration of contact the long power supply that can damage, too short can't see experimental phenomena), observes the rotation situation of small magnetic needle simultaneously.As can be seen here, existing experimental implementation is complicated, with high content of technology, easily damages power supply.So existing lecture experiment is not suitable for the grouping experiment changing student into.

China Patent Publication No. is CN201032568, and publication date is that the utility model instructions on March 5th, 2008 discloses " a kind of Oersted experimental device for student ", and this device comprises battery, small magnetic needle, battery carrier and straight wire.Described straight wire is through the circular hole on two sheet metals of battery carrier and be screwed, and small magnetic needle to be placed on immediately below straight wire parallel part with it, as long as student pinches sheet metal with hand, just can be observed the magnetic phenomenon that oersted finds.But this utility model structure, when student's attended operation, has potential safety hazard, and its demonstrating effect is poor, and demo function is more single, can not demonstrate due to sense of current change and the change of size of current on the impact of small magnetic needle.

Utility model content

The purpose of this utility model be poor for the demonstrating effect existed in prior art, have the deficiencies such as potential safety hazard, provide a kind ofly to eliminate safe hidden trouble, a kind of H. C. Oersted Experiment demonstration board that demonstrating effect is various, effective.

The purpose of this utility model is realized by following technological means: a kind of H. C. Oersted Experiment demonstration board, includes substrate, described substrate is provided with the rectangular circuit be connected to form in turn by battery case, straight wire, breaker, slide rheostat; The upper and lower side frame of described rectangular circuit arranges by straight wire and forms, and the left and right side frame of described rectangular circuit is arranged formed by battery case and breaker, slide rheostat; The below of the straight wire on described upper and lower side frame is also respectively provided with a needle.

Described battery case, straight wire, breaker, slide rheostat are all screwed and are arranged on substrate; Described needle is all flexibly connected by buckle and is arranged on substrate.

Compared with prior art the utility model has following obvious advantage: the utility model is easy and simple to handle, good demonstration effect, diverse in function, the relation of electric current with electromagnetism can easily be contrasted, the knowwhy of circuit in Students ' Learning physics can be helped, and can well combine with practice, integral manufacturing cost is lower, is easy to spread.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

In figure, 1-battery case, 2-substrate, the straight wire of 3-, 4-needle, 5-breaker, 6-slide rheostat.

Embodiment

Illustrate below in conjunction with accompanying drawing and with embodiment, the utility model to be described in further detail:

A kind of H. C. Oersted Experiment demonstration board as shown in Figure 1, includes substrate 2, described substrate 2 is provided with the rectangular circuit be connected to form in turn by battery case 1, straight wire 3, breaker 5, slide rheostat 6; The upper and lower side frame of described rectangular circuit arranges by straight wire 3 and forms, and the left and right side frame of described rectangular circuit is arranged formed by battery case 1 and breaker 5, slide rheostat 6; The below of the straight wire 3 on described upper and lower side frame is also respectively provided with a needle 4.The utility model, when demonstrating H. C. Oersted Experiment principle, can pass through Closing Switch lock 5, thus observes needle 4 and deflect.Due to the existence of terrestrial magnetic field, needle 4 be made obviously to depart from original direction, must lead to stronger electric current (about 5 ~ 10 peace) in straight wire 3, electric current strong so generally can be taked to touch battery the two poles of the earth and cause short circuit to obtain.Therefore, experiment is equivalent to power supply external short circuit, and power supply will be damaged (in dry cell, resistance is comparatively large, to use dry cell as well).Should illustrate that this is only used to obtain of short duration big current and the adaptation taked to student during experiment.For protection power source, slide rheostat 6 current limliting of should connecting in circuit, and also conduction time is short.Straight wire 3 preferably north-south is placed, can be influenced as placed demonstrating effect along East and West direction.The utility model can demonstrate the electric current of different directions preferably on the impact of needle 4, good demonstration effect, and contrast obviously.And by the adjustment of slide rheostat 6, the size of current that demonstration is different is further on the impact of needle 4.To sum up, the utility model is in concrete operations, and not useful hand directly contacts the link of the circuit of connection, effectively eliminates unsafe factor.

Described battery case 1, straight wire 3, breaker 5, slide rheostat 6 are all screwed setting on a substrate 2; Described needle 4 is all flexibly connected by buckle and arranges on a substrate 2.Two needles 4 can be carried out exchange demonstration by such setting, strengthen effect and the contrast of demonstration.

In a word, the utility model provide a kind ofly to eliminate safe hidden trouble, a kind of H. C. Oersted Experiment demonstration board that demonstrating effect is various, effective.The above; be only a part of embodiment of the present utility model; protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.

Claims

1. a H. C. Oersted Experiment demonstration board, include substrate (2), it is characterized in that: described substrate (2) is provided with the rectangular circuit be connected to form in turn by battery case (1), straight wire (3), breaker (5), slide rheostat (6); The upper and lower side frame of described rectangular circuit arranges by straight wire (3) and forms, and the left and right side frame of described rectangular circuit is arranged formed by battery case (1) and breaker (5), slide rheostat (6); The below of the straight wire (3) on described upper and lower side frame is also respectively provided with a needle (4).

2. H. C. Oersted Experiment demonstration board according to claim 1, is characterized in that: described battery case (1), straight wire (3), breaker (5), slide rheostat (6) are all screwed and are arranged on substrate (2); Described needle (4) is all flexibly connected by buckle and is arranged on substrate (2).