JPH0736666Y2 - Magnetizing jig for magnetic ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a magnetizing jig used for magnetizing a magnetic ring, which is a kind of magnetic health accessory.

[Conventional technology]

BACKGROUND ART A magnetic health accessory made of a precious metal magnet alloy has been commercialized as an integrated body of a magnetic health appliance and a precious metal accessory.

A platinum-cobalt alloy has long been known as a noble metal magnet alloy, but a gold-platinum-cobalt alloy (Japanese Patent Publication No. 63-52102) is an alloy mainly composed of gold.

Magnetic health accessories made of these noble metal magnet alloys are roughly classified into three types: necklaces (necklaces), bracelets (bangles), and rings (rings).

The effect of magnetism on the body is most noticeable in necklaces with a total length of about 40 cm, and the effect of bracelets with a total length of about 20 cm is second only to this.

On the other hand, in a small and light ring, since the effective area of the magnetic pole is limited, it is necessary to adopt the most effective arrangement of the magnetic pole and the direction of magnetization.

It is empirically said that a magnetic flux density of 500 to 600 Gauss or more is required to obtain a therapeutic effect by magnetism. Therefore, it is of course necessary to use a magnet alloy having a large coercive force, but on the other hand, it is necessary to optimize the direction of magnetization and the arrangement of magnetic poles.

The only magnetic ring currently on the market is made of platinum-cobalt alloy, but it is magnetized in the axial or radial direction of the annular ring, and a magnetic flux density of 1100 to 1600 gauss is obtained.

Such simple magnetization has the advantage that it does not require a dedicated magnetizing device and can be easily performed with a general uniform magnetic field, but it is not the optimum direction of magnetization.

In particular, in a gold-based magnet alloy having a lower magnetic flux density than that of a platinum-cobalt alloy, sufficient magnetic flux density cannot be obtained by such simple and uniform magnetization.

Further, the magnetic ring attached to a finger often comes into contact with a magnetic recording medium such as a cash card or a floppy disk, which may disturb recording.

[Problems to be solved by the device]

Therefore, an object of the present invention is to provide a magnetizing jig capable of arranging the magnetizing direction and the magnetic pole so that the maximum magnetic flux density is obtained inside the magnetic ring and the leakage of magnetic flux to the outside is minimized. Is to propose.

Generally, the ring is precisely adapted to the wearer's finger, and therefore many sizes having different inner diameters are prepared. The same applies to the magnetic ring, and for that reason, it is complicated to align the magnetizing jigs for each size.

Therefore, it would be convenient if a common magnetizing jig could be used for all sizes of magnetic rings. It is one of the objects of the present invention to provide such a magnetizing jig.

Hereinafter, description will be given with reference to the drawings.

FIG. 1 is a front view of a ring magnetized using the magnetizing jig of the present invention.

The inner peripheral surface 2 of the annular magnetic ring 1 is magnetized with six inner peripheral surfaces so that N poles and S poles having opposite polarities are alternately arranged.

Such inner peripheral surface multi-pole magnetization is the magnetic pole arrangement adopted in the stator of the multi-pole motor.

As will be described later, such a magnetic pole arrangement provides a large magnetic flux density on the inner peripheral surface of the ring, while minimizing the leakage of the magnetic flux to the outside.

When magnetizing the inner surface of a multi-pole motor stator, a magnetizing jig that matches the inner diameter of the stator is used.The jig is a rod-shaped iron core that is made by winding a large number of wires. It is arranged radially according to the number of magnetic poles, and its shape is complicated and it is difficult to miniaturize it.

On the other hand, when magnetizing a large number of magnetic rings, it is complicated to prepare a large number of magnetizing jigs having different sizes. Therefore, in the present invention, a magnetizing jig as shown in FIGS. 2 and 3 was devised and adapted to each size ring.

[Means for Solving the Problems]

For the above-mentioned purpose, in the present invention, an iron core consisting of an iron round bar having an even number of grooves parallel to the axis, and meandering so as to engage with all of the grooves, and to the grooves together with an insulating filler. It consists of one embedded electric wire, a base fixing one end of the iron core, and terminals for connecting both ends of the electric wire to a power source, and the iron core goes from the one end to the other end. A magnetizing jig for a magnetic ring has been devised, the outer peripheral surface of which is formed into a conical surface shape together with the insulating filler so as to be tapered.

〔Example〕

FIG. 2 is an axial sectional view of the magnetizing jig of the present invention.
The figure is a side view.

Six grooves 12 parallel to the axis of the round bar are provided at equal intervals on the outer circumference of the iron round bar to form an iron core 11 having a star-shaped cross section.
One electric wire 13 is embedded in a meandering manner so as to engage with all the grooves, and an epoxy resin as an insulating filler 14 is filled in the space of the grooves.

One end 15 of the iron core is fixed to the base 16, and the outer peripheral surface of the iron core 11 is ground together with the insulative filler 14 into a conical surface so that the one end 15 is tapered toward the other end 17.

The end of the electric wire 13 is connected via a terminal 18 to a power source (not shown) capable of instantaneously flowing a large direct current.

As shown in FIG. 2, the directions of the electric currents flowing through the electric wires 13 are alternately reversed, so that the directions of the lines of magnetic force are distributed as shown by the broken line arrows, and the inner peripheral surface 6 poles as shown in FIG. Magnetism is realized.

Selected from the standard platinum-cobalt (PtCo) magnet alloy and the gold-platinum-cobalt (Au-PtCo) magnet alloy described above.
A standard cylindrical ring (commonly called a flat ring) is made with 14K and 18K alloys, and the inner peripheral surface 6 poles are magnetized as shown in Fig. 1 using the magnetizing jig of the present invention. The magnetic flux density of the part was measured.

Further, as a comparative example, a conventionally used magnetizing method, that is, axial magnetization as shown in FIG. 4 and radial magnetization as shown in FIG. 5 were performed, and the magnetic flux density was measured in the same manner.

The results are shown in the table.

As is clear from these results, axial magnetization (FIG. 4) and radial magnetization (fifth magnetization) adopted in the conventional magnetic ring are used.
Compared with the figure), the largest magnetic flux density can be obtained in the inner peripheral surface 6-pole magnetized using the jig of the present invention. Further, the minimum leakage of the magnetic flux to the outside is a natural result from the arrangement of the magnetic poles.

The above embodiment is an example of magnetizing the inner peripheral surface with six poles, but it is practical that the number of magnetic poles is in the range of 4 to 12 poles.

In the embodiment of the magnetizing jig shown in FIG. 2 and FIG. 3, the wiring of the so-called one-turn method in which one groove 12 is wound only once is shown. It is also possible to wire the electric wire 13 in a loop shape several times, and then meander to change the winding direction and move to the adjacent groove.

Such wiring may be suitable depending on the discharge current characteristics of the magnetizing power source used.

[Effect of device]

By adopting the magnetizing jig of the present invention, the maximum magnetic flux density can be concentrated on the inner peripheral surface of the magnetic ring to enhance the therapeutic effect, and at the same time, the leakage of the magnetic flux to the outside can be suppressed to the minimum. It is possible to prevent adverse effects on the medium.

Furthermore, since the outer peripheral surface of the iron core is formed in a tapered shape in a conical shape, it is possible to deal with a wide range of sizes of magnetic ring with one versatile jig.

[Brief description of drawings]

FIG. 1 is a front view showing the arrangement of magnetic poles in a magnetic ring magnetized by the magnetizing jig of the present invention, and FIGS. 2 and 3 are axial sectional views and side views of the magnetizing jig of the present invention, respectively. 4 and 5 are side sectional views showing the magnetization direction of the conventional magnetic ring, and FIG. 5 is a front view showing the magnetization direction of the conventional magnetic ring. [Explanation of symbols] 11 …… Iron core 12 …… Groove 13 …… Electric wire 14 …… Insulating filler 15 …… One end 16 …… Base 17 …… Other end 18 …… Terminal

Claims (1)

[Scope of utility model registration request] 1. An iron core (11) made of an iron round bar having an even number of grooves (12) parallel to an axis, and meandering so as to engage with all the grooves (12), and an insulating filling. A base (16) fixing one electric wire (13) buried in the groove (12) together with the agent (14) and one end (15) of the iron core (11).
And a terminal (18) for connecting both ends of the electric wire (13) to a power source, and the iron core (11) is tapered from one end (15) to the other end (17) thereof in order. A magnetizing jig for a magnetic ring, the outer peripheral surface of which is formed into a conical surface shape together with the insulating filler (14).