CN2641618Y

CN2641618Y - Magnetic force tester

Info

Publication number: CN2641618Y
Application number: CN 03278394
Authority: CN
Inventors: 毛建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-04
Filing date: 2003-09-04
Publication date: 2004-09-15
Anticipated expiration: 2013-09-04

Abstract

The utility model relates to a simple magnetic force testing instrument, which is in particular suitable applied in elementary schools and middle schools for experiments of teaching magnets, electromagnets, electromagnet relays and amperes law. A dial disk is arranged in a casing, an arc dial gauge with S and N polarity symbols marked on the both ends is arranged at the upper part of the dial disk, a needle pivot is fixed and connected vertically at the lower part, a sleeve pipe is connected with the needle pivot and is movably connected with a needle, and a permanent magnet is fixed and connected at the lower end of the needle. The polarity directions of the permanent magnet are arranged the same directions with the both sides of the casing, and the dial disk and the needle are both arranged in the casing. The utility model can accurately measure polarities of an object to be measured, the size and the change of magnet force can be judged. The utility model is a good instrument for measuring polarities and magnet force in the teaching of elementary schools and middle schools, and other objected whose magnet is to be measured.

Description

A kind of magnetic force tester

Affiliated technical field

The utility model is a kind of magnetic force tester, and particularly a kind of polarity of judging magnet, electromagnet and other magnetic materials is checked a kind of simple and easy magnetic force tester of its magnetic force size and magnetic force size variation situation.

Background technology

At present in the education of middle school, primary school, have a large amount of about contents of courses such as research learning " magnet ", " electromagnet ", " Ampere's law ", " electromagnetic relays ", but the good experiment measuring instrument of neither one, judge electromagnetism polarity needle in the teaching, check magnetic force size is to see how much the judging of thing of suction pin or iron filings and so on.As magnetic switch, there is not the survey instrument of simple survey magnet polarity and magnetic force size at other in the devices such as magnetic valve yet.

Summary of the invention

The purpose of this utility model just provides a kind of polarity that can measure permanent magnet, electromagnet, magnetic material, magnetic elements etc., the easy magnetic force tester of their magnetic force of energy measurement and magnetic force size variation.

The technical solution of the utility model is according to the magnet homopolar-repulsion, and the physical property that heteropole is inhaled mutually is made.At first indicate S, N utmost point polarity mark's graduation apparatus at an index dial upper design one two ends.Then at the affixed needle pivot of the lower vertical of index dial, the pointer that socket one flexibly connects on the needle pivot, pointer can pivot, socket one sleeve pipe on the needle pivot between pointer and the index dial.The affixed permanent magnet in pointer bottom.The S of permanent magnet, N utmost point polarity and the equidirectional setting of housing dual-side.S, N pole marks will can equidirectionally be provided with on the S of permanent magnet, N utmost point polarity and the index dial, also can be provided with in the other direction.The index dial that comprises pointer is contained in the housing, and miscellaneous part of the present utility model except that permanent magnet all can not be made of iron or magnetic material as housing, index dial, needle pivot, sleeve pipe, pointer.

Using method of the present utility model is with magnetic force tester horizontal positioned, make pointer vertical naturally, and O scale in the middle of the pointer needle point points to, the magnetic bodies that will test is placed on a side of tester, and be on the same surface level of permanent magnet, at this moment pointer will make pointer offset because of producing the phenomenon that the same sex is inhaled mutually, the opposite sex is repelled each other between permanent magnet and the tested magnetic material, the angle of pointer offset is big more represents that then the magnetic force of testee is big more, and the angle of opposite pointer offset is more little represents that then the magnetic force of testee is more little.The size of magnetic force reflects on index dial.Because the pole polarity at permanent magnet two ends is fixed, move in the other direction to testee as pointer, then illustrate permanent magnet and testee in twos in opposite directions end face be opposed polarity.Opposite as pointer is equidirectional mobile to testee, then illustrate permanent magnet and testee in twos in opposite directions end face be not same polarity.Just be easy to measure S, the N utmost point polarity of testee like this according to the polarity setting of permanent magnet.Also can move to tester on the measured object limit when testing certainly and test.The utility model is in little, the middle school teaching and other need survey the good instrument of the polarity and the magnetic force size of magnetic bodies.

The technical solution of the utility model provides a kind of can be judged the polarity of magnetic bodies, to a kind of simple and easy magnetic force tester that the variation of magnetic force size and magnetic force size is carried out fast, accurately visual extremely easily again quantification is tested.

Description of drawings:

The utility model is described in further detail below in conjunction with drawings and Examples

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

Fig. 2 is the left view of Fig. 1

Among the figure: 1, housing, 2, index dial, 3, graduation apparatus, 4, pointer, 5, needle pivot, 6, permanent magnet, 7, sleeve pipe.

Specific embodiments:

From Fig. 1, shown in Figure 2, indicate S, N utmost point polarity mark's graduation apparatus 3 at the two ends of the index dial 2 upper design one garden arc of making of organic glass, the needle pivot 5 that an affixed usefulness duroplasts is made in the bottom of index dial 2, this axle becomes T-shaped setting with index dial, the pointer 4 that socket one flexibly connects on the needle pivot is made by plastic sheet, the plastic casing 7 of socket one hollow on the needle pivot between pointer and the index dial, the bonding garden cartridge type permanent magnet 6 in pointer bottom, the S on the S of this permanent magnet, N utmost point polarity and the index dial, the equidirectional setting of N pole marks will.The index dial that comprises pointer is fixedly mounted in the housing 1 of being made by organic glass.

Claims

1, the utility model is a kind of magnetic force tester, it is characterized in that indicating at upper design one two ends of index dial S, N utmost point polarity mark's graduation apparatus; The affixed needle pivot in the bottom of index dial, this axle become T-shaped to be provided with index dial, pivot bush unit one pointer again behind socket one sleeve pipe on the needle pivot; The affixed permanent magnet in pointer bottom, the polar orientation of permanent magnet and the equidirectional setting of housing dual-side; Pointer and index dial all are contained in the housing.

2, magnetic force tester according to claim 1 is characterized in that described housing, index dial, pointer, needle pivot and sleeve pipe are all without iron or magnetic material making.

3, magnetic force tester according to claim 1 is characterized in that S, the N pole marks will on S, N utmost point polar orientation and the index dial at described permanent magnet two ends can equidirectionally be provided with, and also can be provided with in the other direction.