CN2404111Y

CN2404111Y - Magnetic measuring balance

Info

Publication number: CN2404111Y
Application number: CN 00202389
Authority: CN
Inventors: 任长裕; 黄建通
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-24
Filing date: 2000-01-24
Publication date: 2000-11-01
Anticipated expiration: 2010-01-24

Abstract

The utility model relates to a teaching demonstration device, which comprises a panel, a base, a transverse rod, a rotating shaft, a magnetic moment adjusting device and a poise. The panel is fixed to the base. Balance scales and magnetic moment scales are marked on the panel. The transverse rod is fixed to the panel by the rotating shaft. One end of the transverse rod is provided with a poise hanging hole and a fine adjustment balance block, and the other end is fixed with a magnet. An indicating needle is arranged above the rotating shaft. The magnetic moment adjusting device is positioned right above the magnet of the transverse rod. The lower end of an adjustable screw rod is provided with a sleeve head in which a magnet is arranged. The screw rod is fixed to the panel by a bracket. The utility model can quantitatively measure the relationship between the distance of two magnets and the magnetic force of the two magnets, with the advantages of high intuition and reliability, simple structure, and strong scientificalness.

Description

The magnetometry balance

The utility model relates to a kind of education demonstrator of measuring two magnet spacing sizes and magnetic force magnitude relationship.

In the teaching of middle school physics section, owing to still there is not a kind of education demonstrator that is used to measure magnet spacing and magnetic force magnitude relationship, therefore can only make the description of " two blocks magnet between interactional magnetic force size be to increase " qualitatively, be difficult to prove between the two relation with the means of testing along with the minimizing of distance.

The purpose of this utility model is exactly that the education demonstrator of two magnet spacings sizes of a kind of energy quantitative measurement with the magnetic force magnitude relationship will be provided.

The utility model comprises panel, base, cross bar, rotating shaft, magnetic apart from adjusting gear and weights, and the panel vertical fixing is on base, and panel is marked with balance scale and magnetic apart from scale; Cross bar is fixedly arranged on the panel by the rotating shaft at the center of being arranged at, one end of cross bar is established the hole and the spiral fine adjustment counterbalance that can hang weights, the other end is fixed the magnet of a magnetic pole towards above-below direction, the center line of this piece magnet equates with the distance of rotating shaft with the hole of the distance of rotating shaft and suspension weights, the rotating shaft of cross bar top vertically is provided with a root pointer, and the balance scale that marks on this pointer and the panel cooperates the equilibrium position in order to definite cross bar; Magnetic apart from adjusting gear be positioned at magnet on the cross bar directly over, be an adjusting screw, it is one pullover that establish the lower end of screw rod, pullover in the opposite magnet of pole orientation of magnet on direction and the cross bar of a sheathed magnetic pole, screw rod is fixed on the panel by support.

In addition, establish the slewing area that two spacer pins limit cross bar on the panel.

In order to guarantee to measure accurately employing unmagnetized material such as cross bar, adjusting screw, support such as copper, aluminium, stainless steel, plastics etc.

During use, earlier magnetic is unloaded apart from the magnet on the adjusting gear, make cross bar be in equilibrium state by the fine adjustment counterbalance of adjusting on the cross bar, then magnet is put again, the right at cross bar hangs a weights, adjust magnetic and make cross bar be in equilibrium state apart from adjusting gear, this moment, the spacing of two blocks of magnet was two scales (both the repulsive force of two blocks of magnet equaled the gravity of a weights); When the right of cross bar hangs four weights, to adjust magnetic and make cross bar be in equilibrium state apart from adjusting gear, this moment, the spacing of two blocks of magnet was a scale (both the repulsive force of two blocks of magnet equaled the gravity of four weights).From above-mentioned demonstration, can draw the conclusion of " magnetic force of two blocks of magnet size and distance square be inversely proportional to ".

Two blocks of magnet of the utility model energy quantitative measurement are apart from the relation of size with the magnetic force size, and the structure that adopts balance has characteristics such as science is strong, intuitive and reliable, simple in structure, easy to operate as the means of demonstrating.

Fig. 1 is a synoptic diagram of the present utility model.

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

See Fig. 1, the utility model is made of apart from adjusting gear 5, weights 6 etc. jointly panel 1, base 2, cross bar 3, rotating shaft 4, magnetic; Panel 1 is marked with pointer balance scale 11 and two magnet spacing scales 12 and two spacer pins 13; The hole 31 and the spiral fine adjustment counterbalance 32 that can hang weights 6 are offered in cross bar 3 the right, and a magnet 33 is fixed on the left side of cross bar 3, and cross bar is fixed on the panel by rotating shaft 4, upper fixed one root pointer 34 of rotating shaft 4; Magnetic is fixed on above the panel 1 by support 53 apart from adjusting gear 5, and magnet 51 (pole orientation is opposite with magnet 33) is sheathed in below pullover of adjusting screw 52, and the cross bar 3 of present embodiment, adjusting screw 52 and support 53 all adopt copper material.

Claims

1. the magnetometry balance is characterized in that comprising panel, base, cross bar, rotating shaft, magnetic apart from adjusting gear and weights, and panel is fixed on the base, and panel is marked with balance scale and magnetic apart from scale; Cross bar is fixedly arranged on the panel by the rotating shaft at the center of being arranged at, and an end of cross bar is established the hole and the fine adjustment counterbalance of a suspension weights, and the other end is fixed a magnet, and the top of cross bar rotating shaft vertically is provided with a root pointer; Magnetic apart from adjusting gear be positioned at magnet on the cross bar directly over, be an adjusting screw, it is one pullover that establish the lower end of screw rod, pullover in a sheathed magnet, screw rod is fixed on the panel by support.

2. magnetometry balance as claimed in claim 1, the pole orientation that it is characterized in that magnet fixing on the cross bar is towards above-below direction.

3. magnetometry balance as claimed in claim 1 is characterized in that the center line of magnet on the cross bar equates with the distance of rotating shaft with the distance of rotating shaft and the hole of suspension weights.

4. the pole orientation of magnet is opposite on the magnetometry balance as claimed in claim 1, the pole orientation that it is characterized in that the magnet of magnetic on the adjusting gear and cross bar.

5. magnetometry balance as claimed in claim 1 is characterized in that establishing on the panel two spacer pins.