HK1067567B - Permanent magnet ring - Google Patents

Description

Permanent magnet ring

Technical Field

The present invention relates to a permanent magnet ring, and more particularly, to an improvement of a permanent magnet ring which is worn around a wrist, ankle, neck, arm, leg, or the like of a human body and promotes blood circulation or the like by a magnetic action output from the permanent magnet ring.

Background

As is well known, a ring is formed using permanent magnets, and is worn around a wrist, ankle, or neck of a human body, and as a body ornament such as a necklace or a bracelet, which is expected to promote blood circulation by utilizing magnetic action output from the permanent magnet ring, many permanent magnet rings have been put into practical use and have been proposed.

One of the existing examples is japanese utility model registration No. 3033643. That is, a magnetic health care instrument comprising a curved ring having opposite ends and elasticity and 4 magnets fixed to the ring, wherein when the ring is attached around the neck of a human body, 2 of the magnets are fixedly disposed near the carotid artery, and the remaining 2 magnets are fixedly disposed from the center of the neck to both sides thereof at positions separated by a predetermined distance, and the two ends of the ring are connected by a connecting means, and the size of the ring can be adjusted by the connecting means.

Another existing example is japanese utility model registration No. 3021225. Specifically, in a necklace or a bracelet or the like in which a decoration base body to be worn around the neck, wrist or the like of a human body is connected by a plurality of connecting members, fine powder ore obtained by pulverizing a plurality of kinds of ores such as silicon liquefied resin, medical stone, serpentine, amphibole, brown waste stone, zeolite, fluorite, limonite or the like and fine powder plant obtained by drying moss such as Bingzi or Moss are mixed as a coating base agent, and after the permanent magnet is coated with the coating base agent, a plurality of sheet-like base materials are formed by heat treatment, and the base materials are embedded in a recessed portion formed on a human body contact surface of the decoration base body.

In the case of the techniques of conventional examples 1 and 2, the permanent magnet is fixed to the connecting member. That is, in the case of utility model registration No. 3033643, a container is fixed to a ring, and a permanent magnet is disposed in the container. In another case of utility model No. 3021225, permanent magnets are embedded in a base body, and the base body is connected in a ring shape.

In the conventional art, a container or a base for fixing a permanent magnet on a ring or at a ring-shaped arrangement position is provided, and the permanent magnet or the like is embedded in the container or the base to constitute a health care instrument or a health care ornament using magnetism. And a container or a base body having a certain size is required, so that the number of permanent magnets that can be mounted on each ring of the ring is easily reduced. Therefore, in the case of conventional health care instruments or health care accessories using magnetism, the action of the magnetic force lines generated by the permanent magnets on various parts of the body is reduced, which is a significant problem.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a permanent magnet ring that can be easily configured into a permanent magnet ring of any size by a user himself/herself, and that can be attached as many unit permanent magnets as possible per one ring and that has a high density of magnetic lines of force acting on various parts of the user's body.

In particular, it is an object to provide a permanent magnet ring which can be arbitrarily set in size by allowing a user to freely set the number of unit permanent magnets constituting the permanent magnet ring, and which is excellent in wearability to various parts of the user's body when used as a necklace, a bracelet or the like.

Another object of the present invention is to provide a permanent magnet ring in which a plurality of unit permanent magnets constituting the permanent magnet ring have a strong magnetic attraction force without using a mechanical coupling means such as a wire, and when the ring is worn around a wrist, a neck, or an ankle, one unit permanent magnet is not detached from the other unit permanent magnet, thereby securely holding the ring.

Further, it is an object of the present invention to provide a permanent magnet ring in which magnetic attraction between the plurality of unit permanent magnets constituting the permanent magnet ring is strong, but magnetic lines of force acting on the wrist, neck, ankle, or the like to which the permanent magnet ring is attached are made to be of such a degree that blood circulation is appropriately and satisfactorily promoted, and there is no fear of causing an imperceptible side effect.

Further, the present invention provides a permanent magnet ring in which the unit permanent magnets constituting the permanent magnet ring are strongly magnetically attracted to each other, and are not easily separated in the separation direction, but the positions of mutual attraction in the non-separation direction are easily changed, and a ring shape is easily established when a plurality of unit permanent magnets are attracted.

The present invention has the following technical means to achieve the above object. That is, in the present invention, if the reference numerals used in the drawings shown in the embodiments are added to describe the permanent magnet ring 1 in which the plurality of unit permanent magnets 5a, 5b, 5c, and 5d … are provided, the plurality of unit permanent magnets 5a, 5b, 5c, and 5d … are formed in a circular shape as a whole in cross section, and the predetermined number of unit permanent magnets 5a, 5b, 5c, and 5d … formed in the circular shape are magnetically attracted to each other at the side surfaces R thereof to form a ring shape having a predetermined size.

In the permanent magnet ring 1 in which a plurality of unit permanent magnets 12a, 12b, 12c … are arranged, the plurality of unit permanent magnets 12a, 12b, 12c … are each formed in a spherical shape, and a predetermined plurality of unit permanent magnets 12a, 12b, 12c … formed in the spherical shape are magnetically attracted to each other on the peripheral surface thereof to form a ring shape having a predetermined size.

Further, in a permanent magnet ring 1 in which a plurality of unit permanent magnets 13a, 13b, and 13c … are arranged, the plurality of unit permanent magnets 13a, 13b, and 13c … are each formed in a flat plate shape, and a predetermined plurality of unit permanent magnets 13a, 13b, and 13c … formed in a flat plate shape are magnetically attracted to each other at side surfaces R thereof to form a ring shape having a predetermined size.

In addition, in a permanent magnet ring 1 having a plurality of unit permanent magnets 14a, 14b, and 14c … arranged, each of the unit permanent magnets 14a, 14b, and 14c … is formed in a disk shape, predetermined ones of the unit permanent magnets 14a, 14b, and 14c … formed in a disk shape are magnetically attracted to each other on respective side surfaces R to form a ring shape having a predetermined size, a plating layer is formed on the surface of each unit permanent magnet, and a transparent silicon coating layer is formed on the plating layer.

Further, a permanent magnet ring is provided, which is characterized in that a permanent magnet ring is configured by arranging a plurality of unit permanent magnets 21a, 21b, 21c …, each of the unit permanent magnets 21a, 21b, 21c … is formed in a cylindrical shape, a spherical shape, a flat plate shape, a disk shape, or the like, and a predetermined plurality of the unit permanent magnets 21a, 21b, 21c … are magnetically attracted to each other at side faces R to form a ring-shaped permanent magnet ring, each of the plurality of unit permanent magnets 21a, 21b, 21c … is a rare earth magnet such as a neodymium, iron, boron magnet or a samarium, cobalt magnet, or the like, and is magnetized after sintering so that a side face R perpendicular to one easy magnetization direction X-X forms an N pole or an S pole along the easy magnetization direction X-X direction formed when a raw material containing a rare earth element is formed in a magnetic field, and the other side face R at the opposite end of the one side face forms a magnetic pole of an S pole or an N pole The side surfaces R of the unit permanent magnets forming the magnetic poles of the anisotropic magnet are formed into curved surfaces, and a predetermined number of the unit permanent magnets 21a, 21b, 21c … of the unidirectional anisotropic magnet are magnetically attracted to each other in a linear contact or a point contact manner at the side surfaces R of the magnetic poles forming the curved surfaces, thereby forming a ring shape having a predetermined size.

The unit permanent magnets 21a, 21b, 21c … are circular in cross section and are formed in a cylindrical shape as a whole, and predetermined ones of the unit permanent magnets 21a, 21b, 21c … are magnetically attracted in a ring shape in line contact with each other on a side surface R of a magnetic pole forming a curved surface.

Further, the unit permanent magnets 21a, 21b, and 21c … are formed in a spherical shape, and a predetermined number of the unit permanent magnets 21a, 21b, and 21c … are magnetically attracted in a ring shape in a point contact manner on a side surface R of a magnetic pole forming a curved surface.

In addition, the unit permanent magnets 21a, 21b, 21c are formed in a flat plate shape, and a predetermined plurality of the unit permanent magnets 21a, 21b, 21c … are magnetically attracted in a ring shape in a line contact manner on a side surface R of a magnetic pole forming a curved surface.

The permanent magnet ring is characterized in that a plating layer is formed on the surface of the unit permanent magnet, and a transparent silicon coating layer is formed on the plating layer.

In addition, a method for manufacturing unit permanent magnets in a permanent magnet ring, wherein each of the unit permanent magnets 21a, 21b, 21c … constituting the permanent magnet ring is formed in a cylindrical shape, a spherical shape, a flat plate shape, a disk shape, or the like, and a predetermined number of the unit permanent magnets 21a, 21b, 21c … are magnetically attracted to each other at the side surfaces R thereof, is characterized in that in the method for manufacturing the unit permanent magnets 21a, 21b, 21c … in the permanent magnet ring, a steel ingot is manufactured on the basis of a raw material containing a rare earth element, the steel ingot is crushed, an easy magnetization direction X-X is determined so that crystals are aligned when molding is performed in a magnetic field, a block-shaped body is manufactured by molding in the magnetic field, a block-shaped sintered body is manufactured by sintering, a plurality of unit permanent magnets are obtained by cutting, and the unit permanent magnets are processed into the cylindrical shape, After forming a plating layer and a silicon coating layer on the surface of the unit permanent magnets, the unit permanent magnets are magnetized in the easy magnetization direction X-X by forming an N-pole annular S-pole on one side surface R perpendicular to the easy magnetization direction X-X of each unit permanent magnet 21a, 21b, 21c …, and the other side surface R opposite to the one side surface is formed with a magnetic pole of S-pole or N-pole, and the side surface R forming the magnetic pole of the unit permanent magnets is formed with a curved surface.

As described in detail above, according to the aspects 1, 2, 3, and 4 of the present invention, it is possible to provide a permanent magnet ring in which a user can easily construct a permanent magnet ring of any size, and it is possible to provide a permanent magnet ring in which a plurality of unit permanent magnets can be attached to each ring of the ring as much as possible and the density of magnetic lines of force acting on each part of the user's body is high.

In particular, since the user can freely set the number of unit permanent magnets constituting the permanent magnet ring, it is possible to arbitrarily set the size of the permanent magnet ring, and when the permanent magnet ring is used as a necklace, a bracelet or the like, it is possible to provide a permanent magnet ring which is excellent in wearing properties to various parts of the user's body.

Further, according to the invention described in claim 5 of the present invention, in addition to the above-mentioned advantages, the decorative state of gold plating or the like can be maintained for a long period of time.

Further, according to the inventions described in the 6 th, 7 th, 8 th and 9 th aspects of the present invention, it is possible to provide a permanent magnet ring in which the magnetic attraction force between the plurality of unit permanent magnets constituting the permanent magnet ring is strong without using mechanical coupling means such as wires, and the ring-shaped permanent magnet ring can be firmly held without causing the unit permanent magnets to come off one by one when the ring-shaped permanent magnet ring is worn around a wrist, a neck, an ankle or the like.

As described above, it is possible to provide a permanent magnet ring in which magnetic attraction between the plurality of unit permanent magnets constituting the permanent magnet ring is strong, but magnetic lines of force acting on the wrist, neck, ankle, or the like on which the permanent magnet ring is mounted are made to be of such a degree that blood circulation is appropriately and satisfactorily promoted, and there is no fear of causing an imperceptible side effect.

Further, it is possible to provide a permanent magnet ring in which the magnetic attraction between the unit permanent magnet rings constituting the permanent magnet ring is strong, and the unit permanent magnet rings are not easily separated from each other in the separation direction, but the mutual attraction position in the non-separation direction is easily changed, and a ring shape is easily formed when a plurality of unit permanent magnets are attracted.

Further, according to the invention described in claim 10, in addition to the above advantages, the decorative state of gold plating or the like can be maintained for a long period of time.

Further, according to the invention described in claim 11 of the present invention, it is possible to provide a method for manufacturing a permanent magnet ring using a plurality of unidirectional anisotropic unit permanent magnets, and to easily manufacture a permanent magnet ring which exhibits the above-described advantages.

Drawings

Fig. 1 is a view showing a state in which a permanent magnet ring according to an embodiment of the present invention is worn on a wrist.

Fig. 2 is a view showing a state in which the permanent magnet ring according to the embodiment of the present invention is worn around the neck.

Fig. 3 is a view showing a state in which the permanent magnet ring according to the embodiment of the present invention is worn around the ankle.

Fig. 4 is a perspective view showing an example of a columnar unit permanent magnet constituting the permanent magnet ring according to the embodiment.

Fig. 5 is a plan view of the permanent magnet ring according to the embodiment of fig. 4.

Fig. 6 is a view showing a state in which a plurality of unit permanent magnets of fig. 4 are connected to each other by magnetic attraction.

Fig. 7 is a perspective view illustrating a state where cylindrical unit permanent magnets having different sizes are formed, as shown in (a) and (b).

Fig. 8 is a view showing an example in which permanent magnet rings are configured by magnetically attracting the unit permanent magnets of fig. 7 having different sizes.

Fig. 9 is a cross-sectional view showing an example in which a copper or nickel plating layer is formed on the rare earth element surface of the cylindrical unit permanent magnet of fig. 4, and a gold or platinum-based rhodium plating layer is further formed thereon.

Fig. 10 is a partial sectional view showing a silicon-based transparent coating layer formed on the plating layer of the unit permanent magnet of fig. 9.

Fig. 11 is a plan view showing a permanent magnet ring composed of a plurality of spherical unit permanent magnets.

Fig. 12(a) and (b) collectively show a cross section of a unit spherical permanent magnet, where (a) is a cross section of the unit spherical permanent magnet shown along the line 11-11 in fig. 11, and (b) is a cross section of the unit spherical permanent magnet shown along the line 12-12 in fig. 11.

Fig. 13 shows a flat plate-like unit permanent magnet, in which (a) is a front view, (b) is a plan view, and (c) is a side view.

Fig. 14 is a plan view of a permanent magnet ring including a plurality of plate-like unit permanent magnets according to the embodiment shown in fig. 13.

Fig. 15 shows the disk-shaped unit permanent magnets magnetically attracted to each other, where (a) is a front view and (b) is a plan view.

Fig. 16 shows the unit permanent magnets having a substantially square shape magnetically attracted to each other, where (a) is a front view and (b) is a plan view.

Fig. 17 is a process diagram of manufacturing a unit permanent magnet and a permanent magnet ring having unidirectional anisotropy.

Fig. 18 is a view showing formation in a magnetic field in step 9 in the manufacturing process of fig. 17.

Fig. 19 is a view showing the cutting of the block-shaped sintered body at step 14 in the manufacturing process of fig. 17.

Fig. 20 is a view showing a unit permanent magnet blank obtained by cutting in fig. 19.

Fig. 21 is a view showing a process such as polishing at step 16 in the manufacturing process of fig. 17.

Fig. 22 is a view showing a magnetization process of the cylindrical unit permanent magnet at step 19 in the manufacturing process of fig. 17.

Fig. 23 is a sectional view of a cylindrical unit permanent magnet magnetized into a unidirectional anisotropic magnet by the magnetization process of fig. 22.

Fig. 24 is an explanatory diagram of a closed magnetic circuit and a leakage magnetic flux when a plurality of unidirectional anisotropic unit permanent magnets produced by the magnetization process of fig. 22 are magnetically attracted to each other to form a permanent magnet ring.

Fig. 25 is an explanatory diagram of the mutual magnetic attraction relationship of the unidirectional anisotropic cylindrical unit permanent magnets.

Fig. 26 is a view for explaining processing of a unit permanent magnet of a spherical shape having unidirectional anisotropy.

Fig. 27 is a diagram of a unit permanent magnet of a spherical shape having unidirectional anisotropy.

Fig. 28 is an explanatory diagram of magnetic attraction between the spherical unit permanent magnets having unidirectional anisotropy.

Fig. 29 is a view for explaining the processing of a unidirectional anisotropic flat unit permanent magnet.

Fig. 30 is a view of a unidirectional anisotropic flat unit permanent magnet.

Fig. 31 is an explanatory diagram of magnetic attraction between the unidirectional anisotropic flat plate-shaped unit permanent magnets.

Description of the symbols: 1a permanent magnet ring; 2, a wrist; 3, neck; 4, ankle; 5a, 5b, 5c, 5d … cylindrical unit permanent magnets; a T end face; an R-side (circumferential surface); 6a, 6b, 6c … cylindrical unit permanent magnet; 7a, 7b … cylindrical unit permanent magnets; 8 a rare earth magnet material; 9 copper or nickel plating; 10 plating a gold layer; 11 a siliceous coating; 12a, 12b, 12c … spherical unit permanent magnets; 13a, 13b, 13c … flat plate-shaped unit permanent magnets; e, surface; g above; 14a, 14b, 14c … disk-shaped unit permanent magnets; 15a, 15b, 15c … square unit magnets; 16, raw materials; 17, steel ingot; 18 block-shaped formed bodies; 19 a block-shaped sintered body; 20a, 20b, 20c … unidirectional anisotropic unit permanent magnet blank; 21a, 21b, 21c … unidirectional anisotropic unit permanent magnet; X-X easy magnetization direction; h1, H2 apply magnetic field direction; the front and back of T1; upper and lower surfaces of Q1; r1 side; l leakage flux; k, closing the magnetic circuit; v is not the escape direction.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The magnet ring 1 of the present invention is worn around the wrist 2 of a user as shown in fig. 1, around the neck 3 as shown in fig. 2, or around the ankle 4 as shown in fig. 3. Other parts not shown may be used as a finger ring, a bracelet, an anklet, or the like.

The permanent magnet ring 1 is configured by connecting a plurality of unit permanent magnets 5a, 5b, 5c, 5d … shown in fig. 5 as unit permanent magnets 5a, 5b, 5c … shown in fig. 4 to each other by magnetic attraction. In the embodiments of fig. 4, 5, and 6, the unit permanent magnets 5a, 5b, 5c, and 5d … are formed to have a circular cross-sectional shape and a cylindrical shape as a whole. Thus, it is simple to form a desired size by connecting a predetermined plurality of unit permanent magnets 5a, 5b, 5c, and 5d …, each of which forms a cylindrical unit permanent magnet, by magnetic attraction. In this case, if the two end surfaces of the respective cylinders of the cylindrical unit magnets 5a, 5b, 5c, and 5d … are T and the circumferential surfaces in the radial direction are R, the unit magnets 5a, 5b, 5c, and 5d … are magnetically attracted to each other on the circumferential surfaces R thereof as shown in fig. 5 and 6. Thus, by forming a desired size, as shown in fig. 1, 2, and 3, it is possible to freely form permanent magnet rings having various sizes corresponding to application sites such as around the arms, ankles 4, legs, and neck, 3, in addition to the wrists 2.

Fig. 5 shows a case where the permanent magnets 5a, 5b, 5c, and 5d … are connected by magnetic attraction. The permanent magnet ring 1 of the present embodiment is formed by connecting different magnetic poles to each other on the circumferential surface (side surface) R of each of the permanent magnets 5a, 5b, 5c, and 5d …, such as an N pole → an S pole → …. Therefore, the permanent magnets 5a, 5b, 5c, and 5d … can be connected to each other with a strong magnetic attraction force, and there is no problem of being accidentally detached during use.

Each of the unit permanent magnets 5a, 5b, 5c, and 5d … is, for example, a magnet made of a rare earth material of an iron-boron system. In recent years, a permanent magnet containing such a rare earth element as a main component has been drawing attention in many fields because it can obtain a strong magnetic force. The unit permanent magnets 5a, 5b, 5c, and 5d are manufactured by performing molding and sintering, then performing machining and polishing to a predetermined size, and then performing plating or the like. An example of the manufacturing method will be described in detail later with reference to fig. 17.

However, in the case of performing the above-described electroplating, as shown in the cross-sectional view of fig. 9, the base layer 9 such as a copper or nickel plating layer is formed on the surface of the rare earth 8 constituting the unit permanent magnets 5a, 5b, 5c, 5d …, for example, by about 20 to 25 μm, and the rhodium-plated layer 10 such as gold or platinum is formed on the surface of the copper or nickel plating layer 9. When the gold or platinum-based rhodium plating layer 10 is formed, for example, a layer of about 1 to 1.5 μm is formed by a gold-cobalt layer. Further, in addition to the gold plating layer, a platinum plating layer may be used, for example.

In the examples shown in fig. 4, 5, and 6, the unit permanent magnets 3a, 3b, 3c, and 3d … have the same size, and the magnetic force intensities of the magnetic poles of the permanent magnets are all defined to be the same, but the magnetic force intensities of the magnetic poles of the permanent magnets may be different from each other.

For example, the unit permanent magnets 6a, 6b, and 6c … shown in fig. 7(a) are the same as the unit permanent magnets 5a, 5b, and 5c … shown in fig. 4, but they may have different diameters, that is, the unit permanent magnets 7a and 7b may have a smaller diameter than the permanent magnets 6a, 6b, and 6c …. (fig. 7b) for example, the permanent magnets 5a, 5b, 5c, 6a, 6b, 6c, 7a, 7b, and 7c … have diameters of 3 Φ, 4 Φ, and 5 Φ, and lengths of about 1 cm.

The thin unit permanent magnets 7a and 7b are magnetically attracted to each other in a ring shape as described above, and thus, for example, a ring or a bracelet can be formed by utilizing the characteristic of the thin unit permanent magnets, or, as shown in fig. 8, if a necklace 1 is formed by alternately magnetically attracting each other as the permanent magnets 6a, 6b, 6c … → the permanent magnets 7a and 7b → the permanent magnets 6a, 6b, and 6c … → the permanent magnets 7a and 7b … → the permanent magnets 6a, 6b, and 6c …, a necklace which is rich in interest can be formed.

Further, if gold-plated unit permanent magnets and platinum-plated unit permanent magnets are magnetically attracted alternately to form a necklace or the like, a fashionable necklace can be formed.

That is, when the permanent magnet ring 1 of the present embodiment is worn on a worn part such as a wrist, an arm, an ankle, a leg, or a neck of a human body, and a necklace or a bracelet is worn, the strong magnetic lines of force pass between the different poles N, S between the unit permanent magnets, and therefore, the strong magnetic lines of force act on the worn part of the human body to promote blood circulation or the like in the part and the surroundings.

Although fig. 9 shows an example in which the plating layers 9 and 10 are formed on the unit permanent magnets 5a, 5b, 5c …, 6a, 6b, 6c …, 7a, and 7b …, if the transparent silicon coating layer 11 is further formed on the surface thereof as shown in fig. 10, rust can be prevented even if a person wearing the permanent magnet ring 1 sweats or the like, and gloss such as gold can be maintained. The formation of the transparent silica layer 11 will be described in more detail in the description of the method for manufacturing the unit permanent magnet or the permanent magnet ring shown in fig. 17 and later.

Although the above embodiments have illustrated examples of the unit permanent magnets having a cylindrical shape, the unit permanent magnets and the permanent magnet rings according to other embodiments will be described with reference to fig. 11 to 16.

The example of fig. 11 and 12 is an example in which the unit permanent magnets 12a and 12b … are each formed into a spherical shape. Fig. 12(a) is a sectional view taken along line 11-11 of the spherical unit permanent magnet 12a of fig. 11, and fig. 12(b) is a sectional view taken along line 12-12. This allows the spherical unit permanent magnets 12a, 12b, and 12c … to magnetically attract each other on the circumferential surface (side surface) R thereof, thereby forming a ring shape as a whole.

In the example shown in fig. 13 and 14, the unit permanent magnets 13a, 13b, and 13c … are formed in a flat plate shape (oval shape), and are magnetically attracted to each other on the left and right side surfaces R as shown in fig. 14, instead of the upper and lower ends G, to form a permanent magnet ring.

In the example shown in fig. 15(a) and (b), the unit permanent magnets 14a, 14b, and 14c … are formed into a disk shape, and are magnetically attracted to each other on the side surface R as shown in fig. 15(b) instead of the disk-shaped end surface G, thereby forming a permanent magnet ring.

In the example shown in fig. 16a and fig. 15b, the unit permanent magnets 15a, 15b, and 15c … are formed in a substantially square shape in plan view, and are magnetically attracted to each other at the rounded side surfaces R to form a permanent magnet ring. In addition, the shape of the unit permanent magnet may be an elliptical shape in cross section or an elliptical cylinder as a whole, or may be a polygonal shape having 5 or more sides in cross section or a prismatic shape as a whole.

However, in the above-described embodiment of the permanent magnet ring 1 of the present invention, the unit permanent magnets 5a, 5b, 5c … or 6a, 6b, 6c …, 7a, 7b or 12a, 12b, 12c …, 13a, 13b, 13c …, 14a, 14b, 14c …, 15a, 15b, 15c … having a predetermined shape are magnetically attracted to each other on the side surfaces R to be entirely ring-shaped, that is, a ring of permanent magnets is formed, and magnetic lines of force act to promote blood circulation in the wearing region of the body, and there are various methods for producing the unit permanent magnets, therefore, the unit permanent magnets can be used either as isotropic magnets or anisotropic magnets, however, it is preferable to obtain a unidirectional anisotropic magnet, and a method for manufacturing a unit permanent magnet and a ring thereof using the unidirectional anisotropic magnet will be described below with reference to fig. 17 and the following.

Fig. 17 is a diagram showing the steps of the manufacturing method, and first, in step 1, the raw material 16 is prepared.

As the raw material, for example, Nd-Fe-B system (neodymium-iron-boron system) is Sm-Co system (samarium-cobalt system). In the case of the Nd — Fe-B system, raw materials having a mixing ratio (in wt%) of Nd 26%, Fe 68%, B2%, Dy (dysprosium) 3%, and Tb (terbium) 1% are used as exemplary weight%. In the case of Sm-Co system, Sm and Co are used₅And use of Sm and Co₁₇Examples of (3). In said Sm and Co₅In the case of system, Sm 34-37% and Co are used₅66-63% (by weight) of the raw materials. Also Sm and Co₁₇In the case of the above-mentioned systems, Sm 20-28%, Fe 10-20%, Cu 3-15%, Co₁₇67-37% of raw materials. However, these proportions may be appropriately changed.

After the weighing in step 2, the raw material is melted at a temperature of about 1000 to 1500 ℃ in step 3 by a high frequency melting method using induction heating, a mold is formed as shown in step 4, the mold is cast in step 5, and a steel ingot 17 is obtained in step 6. Thereafter, coarse pulverization and fine pulverization are performed in step 7 and step 8. For example, crushing to less than # 50 particles using a jaw crusher followed by crushing to less than # 200 particles using a hammer crusher.

Then, shaping in a magnetic field is performed in step 9.

Fig. 18 is a simulation diagram showing the shaping in the magnetic field. As shown in FIG. 18 of the simulation, if the three-dimensional directions of the molded body 18 are represented by X-X axis, Y-Y axis, and Z-Z axis, the easy magnetization direction is formed along the X-X axis by applying the magnetic field H1 along any three-dimensional axis, for example, along the Y-Y axis, from the top and bottom while applying the pressing force P along the other three-dimensional axis, for example, along the X-X axis, and the easy magnetization direction X-X of the crystal is made uniform.

Thus, a block-shaped molded body 18 is obtained as shown in step 10, and then, in the order of steps 11 and 12, the block-shaped molded body is processed in step 10 by a conventional method^-5～10^-6Sintering at 1150-1200 deg.c and vacuum heat treating at 800-900 deg.c.

Thereby producing a block-shaped sintered body 19.

Thereafter, the unit permanent magnet blanks 20a, 20b, and 20c … are obtained as shown in step 15 by cutting in step 14. In this cutting, the permanent magnet materials 20a, 20b, and 20c … are cut along the X-X axis, Y-Y axis, and Z-Z axis so that the left and right side surfaces, the top and bottom surfaces, and the front and back surfaces thereof are aligned. That is, as shown in fig. 20, if the front and rear faces of one unit permanent magnet material 20a, 20b or 20c are T1, the side faces are R1, and the upper and lower faces are Q1, the upper and lower faces Q1 are parallel to the X-X axis of the easy magnetization direction, the front and rear faces T1 are parallel, and the left and right side faces R1 are perpendicular thereto. In other words, the unit permanent magnet materials 20a, 20b, and 20c … define the easy magnetization direction X-X from one side surface to the other side surface.

Then, machining is performed as shown in step 16 and the simulation of fig. 21. This embodiment is an example showing various forms of unit permanent magnets processed into a cylindrical shape as shown in fig. 1 to 10. The original unit permanent magnet blocks 20a, 20b, and 20c … are prismatic, and the left and right side faces R1 and the upper and lower faces Q1 are ground and polished into a cylindrical shape as shown by the chain line in fig. 21. The symbol R indicates a circumferential surface (side surface) processed into a cylindrical shape. As can be seen from fig. 21, the direction from the center of the cylindrical shape to the circumferential surface R, i.e., the radial direction, is the same as the easy magnetization direction X-X. Then, a necessary surface is selected and appropriately processed.

Then, in step 17, a plating process is performed. That is, the oxide, grease, etc. on the surface of the unit permanent magnet pieces 20a, 20b, and 20c … processed into a cylindrical shape are removed by a conventional method, and first, a base layer is formed by an electrolytic plating method.

As an example, the bottom layer of Ni-Cu-Ni is formed to a thickness of 20 to 25 μm. Then, the gold or platinum-based rhodium-plated layer 10 is formed to a thickness of 1 to 1.5 μm.

Surface decorations such as gold decorations and platinum decorations can be used as appropriate. That is, various materials and coating formation methods can be used depending on chemical stability, heat resistance, processability, and the like.

However, if the permanent magnet ring 1 is worn around the wrist or neck, it is necessary to prevent rust or improve gloss retention due to perspiration or natural weathering of the human body. Thus, as shown in step 18, the coating or dipping process will be applied as silicon dioxide (SiO)₂) The siliceous coating material which is a bulk is applied, for example, to a thickness of 1 μm to form the transparent coating layer 11.

Thereby continuously maintaining the decoration of the surface for a long period of time.

Then, as shown in step 19 and fig. 22, the unit permanent magnets are obtained and magnetized. When magnetized, the magnetization is performed by applying a magnetic field H2 in the easy magnetization direction X-X. The magnetization method can be performed by various methods, but one of them can be performed by using a pulse power source.

This makes it possible to produce cylindrical unit permanent magnets 21a, 21b, 21c ….

The cylindrical unit permanent magnets 21a, 21b, and 21c … have an easy magnetization direction X-X perpendicular to the diameter direction of the cylindrical axis, one of the circumferential surfaces R being an N-pole, and the other being an S-pole at a position opposite to the diameter direction.

Thus, an anisotropic magnet magnetized in the easy magnetization direction X-X can be formed to have a strong magnetic property. Further, since the easy magnetization direction X-X is along the radial direction of the unit permanent magnets 21a, 21b, 21c …, a strong magnetic force is exhibited in a part of the easy magnetization direction along the circumferential surface as shown in the simulation diagram of fig. 23. Therefore, the columnar unit permanent magnets 21a, 21b, and 21c … are not mutually joined at the end face T, but are partly magnetically joined in the easy magnetization direction along the circumferential surface R. Therefore, the columnar unit permanent magnets 21a, 21b, and 21c … are magnetically bonded to each other in a part of the easy magnetization direction along the circumferential surface R, and are formed into a ring shape to become the permanent magnet ring 1 as shown in step 21.

The unit permanent magnets 21a, 21b, and 21c … are anisotropic magnets, and are strong unidirectional anisotropic magnets using rare earth elements as raw materials. Therefore, when the permanent magnet ring 1 is formed by magnetically attracting the unit permanent magnets 21a, 21b, and 21c … to each other on the cylindrical easy magnetization direction side surface (cylindrical circumferential surface), the magnetic attraction force of the holding ring is strong, and there is no fear that the unit permanent magnets will fall off even if the wrist or the like is worn. However, as shown in fig. 24, when the permanent magnet ring 1 is worn on the wrist 2 or the like, the unit permanent magnets 21a, 21b, 21c … strongly magnetically attract each other on the circumferential surface (side surface), but the unit permanent magnets 21a, 21b, 21c … are in a ring shape or a wheel shape and attract each other, and thus the magnetic flux becomes a closed magnetic path K. The magnetic lines of force do not act directly on the wrist 2 or the like.

Acting on the wrist 2 is leakage magnetic flux L. Therefore, strong magnetic force acts on the outside of the body, and no imperceptible side effect is generated to the body. The magnetic action by the leakage magnetic flux does not cause side effects and the like, and thus blood circulation can be promoted.

That is, if the magnetic coupling between the unit permanent magnets is made strong in order to prevent the permanent magnet ring from collapsing and falling off, a dense magnetic force action that generates a magnetic flux density of the strong magnetic coupling is generated, and there is a risk that an unpleasant side effect is generated on the body. On the other hand, if the magnetization is so strong that it is appropriate for the body and gives a magnetic force appropriate for promoting blood circulation, the magnetic bonding between the unit permanent magnets is weak, and the shape of the permanent magnet ring is likely to be broken or the unit permanent magnets are likely to fall out. As described above, there is a problem that the unit permanent magnets are not compatible with each other, but the unit permanent magnets are made into a ring shape as the unidirectional anisotropic magnet, so that the unit permanent magnets are strongly magnetically attracted to each other on the side surfaces, and the magnetic force lines generated by the strong magnetic attraction act on the wrist or the like, and do not directly act on the wrist or the like because of the closed magnetic path, so that the unit permanent magnets 21a, 21b, and 21c … are made to have a strength controlled appropriately by the leakage magnetic flux from the N pole to the S pole. However, since the strength of the unit permanent magnet to be strongly magnetically bonded is determined, the leakage magnetic flux causes no unpredictable side effects and sufficiently promotes blood circulation or the like.

The unit permanent magnets 21a, 21b, and 21c … are unidirectional anisotropic magnets as described above, and are magnetically coupled to each other strongly on the side surfaces along the easy magnetization direction of the cylindrical side surfaces, but when this state is observed, the unit permanent magnets 21a, 21b, and 21c … are coupled to each other in a line contact manner in the cylindrical axial direction on the circumferential surface (side surface) R as shown in fig. 25. Therefore, as shown in the solid line diagram, a large force is required to disengage from the magnetic bond in the direction indicated by the chain line, but as shown by the arrow V, an extremely weak force can be applied if the direction does not disengage (non-disengaging direction). Therefore, the ring shape can be easily formed, and the size of the ring can be easily changed by changing the number of the unit permanent magnets.

The residual magnetic flux density (Br) (in CGS units) of the mutually attracting side surfaces R of the specific examples of the cylindrical permanent magnets 21a, 21b, 21c … is preferably 6KG to 15KG (0.6T to 1.5T in SI units), and when the magnet is worn on the body, the surface magnetic flux density of the muscle portion in contact with the body, that is, the leakage magnetic flux density (Br) (in SI units) is preferably 35mT to 200mT, and the coercive force (H) is preferably high_CB) The range of 10KOe to 40KOe (in CGS units) is preferable, and the range of 12 to 50MGOe (in CGS units) is preferable as the maximum energy product (BH) max.

Although the above-described embodiment is an example of a cylindrical unit permanent magnet, a unidirectional anisotropic permanent magnet can be formed even in the case of a spherical shape as shown in fig. 26 to 28.

That is, assuming that the easy magnetization direction of the sintered unit permanent magnets 20a, 20b, and 20c … is X-X, the predetermined material is ground into a ball, and then subjected to plating to form a siliceous transparent coating layer, and then magnetized by applying a magnetic field H2 in the easy magnetization direction.

This makes it possible to machine a spherical permanent magnet having strong unidirectional anisotropy, in which one part of the circumferential surface (side surface) R of the spherical unit permanent magnets 21a, 21b, 21c … has an N-pole and the other part thereof, which is located at a radially opposite position, has an S-pole.

In this embodiment, the spherical unit permanent magnets 21a, 21b, 21c … similar to the cylindrical permanent magnets are attracted strongly to each other. Moreover, a plurality of the permanent magnet rings are joined into a ring shape, and when the permanent magnet rings are formed, a closed magnetic path is formed, and even if magnetic forces strongly attracting each other are generated, unpredictable side effects are not given to the body. That is, the magnetic lines of force acting on the wrist of the body are in a leakage magnetic flux state and act appropriately.

In addition, since the magnetic attraction is performed between the parts of the peripheral surface of the ball in a point contact state, the magnetic attraction positions of the unit permanent magnets 21a, 21b, and 21c … can be easily and freely changed.

Even in the case of the flat plate shape shown in fig. 29 to 31, a permanent magnet having unidirectional anisotropy can be formed.

That is, the sintered unit permanent magnets 20a, 20b, and 20c … were polished into a plate shape with the easy magnetization direction X-X, and then were magnetized by applying a magnetic field H2 along the easy magnetization direction X-X after plating and forming a siliceous transparent coating layer.

This makes it possible to process a strong unidirectional anisotropic flat permanent magnet in which one of the side surfaces R of the flat unit permanent magnets 21a, 21b, and 21c … is an N-pole, and the other side surface R located opposite thereto is an S-pole.

In this embodiment, the flat plate-shaped unit permanent magnets 21a, 21b, and 21c … are also attracted strongly to each other, as in the previous example. Moreover, a plurality of the magnetic rings are joined in a ring shape, and when the permanent magnet ring is formed, a closed magnetic circuit is formed, and even if a strong attractive magnetic force is generated, an unpredictable side effect is not given to the body. That is, the magnetic lines of force acting on the wrist of the body are in a leakage magnetic flux state and act appropriately.

In addition, since the flat plate-shaped side surfaces are magnetically attracted to each other in a line contact state, the magnetic attraction positions of the flat plate-shaped unit permanent magnets 21a, 21b, and 21c … can be easily and freely changed. Since the side surface R is a curved surface (circular arc surface), the flat plate-shaped unit permanent magnets 21a, 21b, 21c … are magnetically attracted in a line contact state as described above.

Claims (7)

1. A permanent magnet ring comprising a plurality of unit permanent magnets of the same shape, each of the unit permanent magnets being cylindrical, spherical, flat or disc-like, a predetermined plurality of the unit permanent magnets being magnetically attracted to each other on respective side surfaces (R) to form a ring, each of the plurality of unit permanent magnets being a rare earth magnet, wherein a raw material containing a rare earth element forms an easy magnetization direction when formed in a magnetic field, and is magnetized after sintering in the direction so that one side surface (R) perpendicular to the easy magnetization direction forms an N-pole or S-pole, and the other side surface (R) opposite to the one side surface forms an S-pole or N-pole to form a unidirectional anisotropic magnet, and the side surface (R) forming the magnetic pole of the unit permanent magnet is formed as a curved surface, a predetermined plurality of unit permanent magnets of the unidirectional anisotropic magnet are magnetically attracted to each other in a linear contact or point contact manner on side surfaces (R) of magnetic poles forming the curved surface to form a ring shape having a predetermined size.

2. The permanent magnet ring according to claim 1, wherein the unit permanent magnets are circular in cross section and are formed in a cylindrical shape as a whole, and a predetermined plurality of the unit permanent magnets are magnetically attracted in a ring shape by line contact on a side surface (R) of the magnetic pole forming the curved surface.

3. The permanent magnet ring according to claim 1, wherein the unit permanent magnets are formed in a spherical shape, and a predetermined plurality of the unit permanent magnets are magnetically attracted in a point contact manner on a side surface (R) of the magnetic pole forming the curved surface to form a ring shape.

4. The permanent magnet ring according to claim 1, wherein the unit permanent magnets are formed in a flat plate shape, and a predetermined plurality of the unit permanent magnets are magnetically attracted in a ring shape by line contact on a side surface (R) of the magnetic pole forming the curved surface.

5. The permanent magnet ring according to any one of claims 1, 2, 3 and 4, wherein a plating layer is formed on the surface of the unit permanent magnet, and a transparent silicon coating layer is formed on the plating layer.

6. The permanent magnet ring of claim 1, wherein the rare earth magnet is a neodymium-iron-boron magnet.

7. The permanent magnet ring of claim 1, wherein the rare earth magnet is a samarium-cobalt magnet.