JPH0137677Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a magnetic toy that uses a ring-shaped magnet, and the outer circumferential surface of the circular inner magnet is attracted to the inner circumferential surface of the annular outer ring magnet, keeping the magnet flat. One magnet is always held floating in space.

Utilizing this property, toys such as Yuho discs and celestial rings can be easily provided.

The principle of this product is as shown in FIG. 3, in which numeral 1 is an annular outer ring magnet that is magnetized in a direction perpendicular to its surface and has magnetic poles on its front and back surfaces 2 and 3. Reference numeral 5 denotes a circular magnet with front and back surfaces 6 and 7 serving as magnetic poles, and when this magnet is placed inside the outer ring magnet, a part of the outer circumferential portion 8 is attracted and held by the inner circumferential surface 4.

In this state, if one of them is fixed and the other is moved, the suction part 9 will move as the other moves, resulting in a smooth circular motion.

In this case, the magnetic poles of the magnets 1 and 5 on one side of the circle are different from each other as shown in the figure.

This proposal utilizes the above properties to make the inner magnet a cylindrical magnet instead of a mere flat magnet.
Furthermore, a hemispherical cap made of magnetic material is attached to the outside.

In FIGS. 1 and 2, 10 is a cylindrical magnet, and 11 is a cap-shaped hemisphere whose inner surface is fixed at the top of the magnet.

Since most of the magnetic field or magnetic flux generated by the cylindrical magnet 10 passes through the hemisphere 11, a substantial neutral position 11' appears on a part of the surface of the hemisphere, that is, on the circumference.
The inner surface 4 of the outer ring magnet is easily attracted to this position, and a repulsive force acts above or below that position, so that it does not attract.

One of the apparent magnetic poles of the cylindrical magnet is located on the periphery 12 of the hemisphere, and this repels the magnet of the same polarity on the back surface 3 of the outer ring magnet, so that the flat surface 13 as shown in FIG.
It is constantly emerging from

Therefore, when an external force is applied to the outer ring magnet 1 in the circumferential direction, it easily rotates as shown in FIG.

The same is true when the outer ring magnet 1 is rotated while holding a hemisphere, and the outer ring magnet rotates around the hemisphere while maintaining its plane, just like the rings of a celestial body.

As described above, the product of the present invention can easily obtain the relative rotary motion of the outer ring body and the inner ring body without using mechanical coupling means, and thus can provide an interesting toy.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the proposed product, FIG. 2 is a sectional view, and FIG. 3 is a sectional view showing the principle. 1... Outer ring magnet, 11... Hemisphere.

Claims (1)

[Scope of utility model registration request] It consists of an annular outer ring magnet with magnetic poles formed on both the front and back sides, and a hemisphere made of a magnetic material with one end of the cylindrical magnet fixed to the top of the inner surface, and the hemisphere serves as an inner magnet and the inner periphery of the outer ring magnet. A magnetic toy that is attracted to a surface and rotates.