CN206460697U - Rotary ampere force presentation instrument - Google Patents

Abstract

A kind of rotary ampere force presentation instrument, solve Ampere force in electromagnetism teaching presence is more abstract, student's indigestion the problem of, the utility model has a circular ring magnet, there is a round ring guide respectively in the inner ring of circular ring magnet and the edge of outer ring, a conical thin-walled roller is placed with two round ring guides, direct current is connected on two round ring guides, conical thin-walled roller can persistently be rotated on two round ring guides；Advantage is, round ring guide is set on circular ring magnet, and conical thin-walled roller is placed in round ring guide, in the presence of Ampere force, conical thin-walled roller persistently rotates on round ring guide, become translation into rotation, it is lasting to become moment, and has no rotating shaft on conical thin-walled roller, adds the intuitive of teaching, interesting and sight, student faster, is more fully built the regularity cognition and complete concept of Ampere force, reach gratifying classroom teaching effect.

Description

Rotary ampere force presentation instrument

Technical field

The utility model belongs to a kind of teaching aid, more particularly to it is a kind of be suitable for using in electromagnetism is imparted knowledge to students it is rotary Ampere force presentation instrument.

Background technology

The power that electrified wire is subject in magnetic field referred to as Ampere force.In physics teaching in secondary school, electrified wire is in magnetic field This part content of courses of stress is a difficult point in teaching, and relatively more abstract, student is not readily appreciated that.In order to allow student more It hurry up, be better understood from this part content of courses, people have made some simple teaching aids.For example, playing wire with a rope It is placed in U magnet, acts on lower rope inclined degree to judge the size of Ampere force by Ampere force, this teaching aid can only be qualitative The size and current strength that judge Ampere force, the relation between conductor length and magnetic induction intensity, it is impossible to allow student to ampere Power is got more information about, and does not reach gratifying classroom teaching effect.Also a kind of ampere force presentation teaching aid, it has Two parallel guide rails, a U magnet is placed between two guide rails, a thin wall type copper is also placed with two guide rails Manage, and thin-wall copper pipe is placed in U magnet, when connecting direct current on guide rail, thin-wall copper pipe will be moved on guide rail, by This builds regularity cognition of the student to Ampere force.But this motion is just completed in a flash, student can not be allowed to set up Play the complete concept of Ampere force.

The content of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, solves the presence ratio of Ampere force in electromagnetism teaching The problem of more abstract, student's indigestion, can continuously display the presence of Ampere force there is provided a kind of, and intuitively, it is interesting rotary Ampere force presentation instrument, is easy to student to understand the substantive content of Ampere force.

The utility model has a circular ring magnet, has one respectively in the inner ring of circular ring magnet and the edge of outer ring Round ring guide, a conical thin-walled roller is placed with two round ring guides, is connected on two round ring guides Direct current, conical thin-walled roller can persistently be rotated on two round ring guides.

The ratio between described girth of two round ring guides is equal to the week of conical thin-walled roller cross section at two guide rails It is the ratio between long, conical thin-walled roller is persistently rotated on two round ring guides.

There is a binding post respectively on two round ring guides, in order to be connected with dc source.

The utility model has the advantage of set round ring guide, and place in round ring guide on circular ring magnet Conical thin-walled roller, in the presence of Ampere force, conical thin-walled roller persistently rotates on round ring guide, become translation into Rotation, it be lasting to become moment, and has no rotating shaft on cone thin-walled roller, adds the intuitive of teaching, interest and views and admires Property, student faster, is more fully built the regularity cognition and complete concept of Ampere force, reach gratifying classroom Teaching efficiency.

Brief description of the drawings

Structural representation of the present utility model on Fig. 1；

Fig. 2 is Fig. 1 top view；

Fig. 3 is the expanded schematic diagram of the conical thin-walled roller of the utility model.

Embodiment

As depicted in figs. 1 and 2, the utility model has a circular ring magnet 2, and circular ring magnet 2 is equal on diameter, thickness Without strict demand；There is a round ring guide 4,5 respectively in the inner ring of circular ring magnet 2 and the edge of outer ring, annular is led Rail 4 is located at the inner ring of circular ring magnet 2, and round ring guide 5 is located at the outer ring of circular ring magnet 2, round ring guide 4,5 and annulus Shape magnet 2 is fixed together；A conical thin-walled roller 1, conical thin-walled rolling are placed with two round ring guides 4,5 The cone of wheel 1 is directed at the center of round ring guide 4, and described conical thin-walled roller 1 is made of thin aluminum sheet, and its expansion shape is such as Shown in Fig. 3；Connect direct current on two round ring guides 4,5, conical thin-walled roller 1 can two round ring guides 4, Persistently rotated on 5；It is horizontal at two guide rails that the ratio between described girth of two round ring guides 4,5 is equal to conical thin-walled roller 1 The ratio between the girth in section, makes conical thin-walled roller 1 persistently be rotated without on two round ring guides 4,5 and drops；Two There is a binding post 3,6 on individual round ring guide 4,5 respectively, binding post 3 is fixed on round ring guide 4, binding post 6 It is fixed on round ring guide 5, in order to be connected with dc source.

The upper and lower faces of described circular ring magnet 2 are respectively N poles and S poles, if N poles are upper, magnetic induction line upwards, circle Conical thin-wall roller 1 is rotated by Ampere force, and Impact direction is can determine whether according to left hand rule, changes the sense of current or magnetic induction line side To, you can change rotation direction.

Claims (3)

1. a kind of rotary ampere force presentation instrument, it is characterised in that it has a circular ring magnet, in the inner ring of circular ring magnet There is a round ring guide respectively with the edge of outer ring, a conical thin-walled rolling is placed with two round ring guides Wheel.

2. rotary ampere force presentation instrument according to claim 1, it is characterised in that two described round ring guides The ratio between girth is equal to conical thin-walled roller the ratio between girth of cross section at two guide rails.

3. rotary ampere force presentation instrument according to claim 1, it is characterised in that on two round ring guides respectively There is a binding post.