CN2461098Y

CN2461098Y - Electromagnet property demonstrator

Info

Publication number: CN2461098Y
Application number: CN 00252247
Authority: CN
Inventors: 蒋先明
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-07
Filing date: 2000-12-07
Publication date: 2001-11-21
Anticipated expiration: 2010-12-07

Abstract

The electromagnet property demonstrator includes mounting board 1, power source 2, ammeter 7, slide rheostat 8, slide groove 13, trolley 12, iron nail box 15, pointer 9, iron core coil 6, etc. on the mounting board, there are one set of slide grooves with bar magnets on each slide groove, and one iron core coil set between the slide grooves can demonstrate various properties of electromagnet.

Description

A kind of electromagnet character demonstration device

The utility model relates to a kind of electromagnet character demonstration device that is used for middle and primary schools' experimental teaching.

At present, students in middle and primary schools are in last electromagnet property experiment class hour, and teacher operates demonstration by some scattered devices on the plane, dais, and visibility is lower, and the demonstration effect is relatively poor.

The purpose of this utility model is to provide a kind of and can hangs on the blackboard, can show the demonstration device of the various character of electromagnet abundant, comprehensive, simple and clearly.

The purpose of this utility model be achieved in that a power supply is set on installing plate, iron-core coil constitutes an electromagnet with the closeable lead that is connected; The magnetic that one iron nail box is used to demonstrate electromagnet is set on installing plate in addition; One group of chute also is set on installing plate, between two chutes, establish an iron-core coil and be communicated with and constitute a closed-loop path with power supply, about respectively establish a dolly that is loaded with bar magnet on two chutes, be used to demonstrate the relation of the polarity of electromagnet and demonstration magnetic force size and coil turn and size of current.

Adopt the utility model be used for the teaching of electromagnet character have simple and clear, directly perceived comprehensively, visibility height, the advantage that experiment effect is good.

Fig. 1 is the utility model front view.

Number in the figure: 1-installing plate, 2-power supply, 3-telegraph key, 4-polarity display board, 5-magnetic pole indicate window, 6-iron-core coil, 7-amp gauge, 8-slide rheostat, 9-pointer, 10-pointer shaft, 11-pointer scale, 12-dolly, 13-chute, 14-iron nail box hook, 15-iron nail box.

With reference to accompanying drawing, in installing plate 1 upper end one power supply 2 is set, one amp gauge 7 and slide rheostat 8 series connections with it is set in addition, power supply is divided into iron nail box hook 14, hang an iron nail box 15 on the hook, the iron nail box is made up of inner box and outer box, is provided with the coil of ribbon core on the inner box, and can constitute an electromagnet after the power supply closure, little iron nail is equipped with in outer box lower end, when closing telegraph key, toward the outer box of drop-down iron nail box, visible iron nail is inhaled on iron core, after the outage, electromagnet loses magnetism, and iron nail falls down, and can demonstrate the magnetic of electromagnet; One group of chute 13 is set in the installing plate lower end, between two chutes, establish an iron-core coil 5 and can constitute a closed-loop path with power supply, on two chutes, respectively place a dolly 12 that is loaded with bar magnet, telegraph key 3 closes, power turn-on, produce electromagnetic force, moving direction according to dolly, after judging the polarity at electromagnet two ends, pulling is located at the polarity display board 4 of chute top again, indicate the polarity that window 5 demonstrates the electromagnet two ends from magnetic pole, in iron-core coil 5 one sides one pointer that can swing 9 is set, pointer 9 is installed on the pointer shaft 10, the pointer lower end is provided with magnet, pointed pointer scale 11 centers, when iron-core coil 5 energisings produce magnetic, can produce magneticaction to the magnet of pointer 8 lower ends, make pointer produce deflection, and show the size of electromagnet magnetic force by the size of needle deflection angle, and can demonstrate the size variation of electromagnet magnetic force by changing coil turn or size of current, can demonstrate the various character of electromagnet fully all sidedly by this demonstration device, has demonstration visibility height, simply, intuitively, understand, effective, the distinguishing feature of being convenient to impart knowledge to students.

Claims

1, a kind of electromagnet character demonstration device, form by installing plate (1), power supply (2), telegraph key (3) etc., it is characterized in that: one group of chute (13) is set on installing plate (1), respectively establish a dolly (12) that is loaded with bar magnet on the chute (13), between chute (13), establish an iron-core coil (6);

2, a kind of electromagnet character demonstration device as claimed in claim 1 is characterized in that: establish a pointer that can swing (9) in iron-core coil (6) one sides;

3, a kind of electromagnet demonstration device as claimed in claim 1 is characterized in that: be provided with the polarity display board (4) that can show electromagnet pole in iron-core coil (6) top;

4, a kind of electromagnet character demonstration device as claimed in claim 1, its feature also is: in installing plate (1) top one iron nail box (15) is set;

5, a kind of electromagnet character demonstration device as claimed in claim 4, it is characterized in that: the outer box of iron nail box (15) is provided with little iron nail, and inner box is established the coil of a ribbon core.