JPH1052577A - Game tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade the falling of a magnetic body chip by magnetic leakage, to enlarge the area of a magnetic guiding base and to improve the degree of freedom of a structure. SOLUTION: This game tool is constituted so as to attract the magnetic body chips 4a-4e on the upper surface of a magnetic metal plate 12 arranged to magnets 10 and 11. In this case, the magnetic poles of the respective magnets 10 and 11 are turned to the same direction and arranged side by side, ferromagnetic metal plates 12 or 12 and 13 are arranged on the upper surface or the upper surface and lower surface of the respective magnets 10 and 11 and a magnetic shielding circuit is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a playground equipment in which a plurality of magnetic chips are stacked three-dimensionally by using magnetic induction to form a model.

[0002]

2. Description of the Related Art Conventionally, as a play equipment of this kind, a plurality of magnetic materials are provided on an upper surface of a magnetic induction table in which a magnet is disposed in a non-magnetic case and a ferromagnetic metal plate is disposed on the upper surface of the case. There has been proposed a device in which chips are mutually adsorbed to construct an arbitrary model (Japanese Utility Model Application Publication No. 4-339).
No. 19). This magnetic guide table prevents the magnetic chips from falling and clumping by averaging the magnetic force without weakening the attractive force of the magnet.

[0003]

However, the above-mentioned conventional play equipment has a structure in which a ferromagnetic metal plate is arranged on a magnet and the magnetic force is averaged while securing an attractive force.
As shown in FIG. 2, there is a problem that the magnetism 32 leaking from the ferromagnetic metal plate 31 on the magnet 30 flows to the counter electrode side (S pole), and the magnetic chip 33 easily falls down due to the influence of the magnetism 32.

On the other hand, from the viewpoint of increasing demand, the present applicant is studying to increase the area of the above-mentioned magnetic guide table to improve the degree of freedom of the structure. In this case, as described in the above-mentioned conventional publication, a plurality of magnetic induction tables are coupled such that the magnetic poles of each magnet are alternately different, or an adhesive, an adhesive tape, or the magnetic poles of each magnet are oriented in the same direction. It is conceivable to combine them by mechanical means.

[0005] However, as shown in FIG. 10, when the different poles of the magnets 35 are connected to each other, the metal plates 36 can be easily attracted and fixed by the mutual magnetic force. When the chips are stacked with 37, 38, 39, and 40, a closed magnetic circuit is formed by the chip 40, so that the magnetic chip 41 does not adhere to the chip 40. That is, there is a problem that the chips cannot be stacked on the chip on which the closed magnetic circuit is formed. Further, as shown in FIG. 11, when the same poles of the respective magnets 35 are joined with an adhesive or the like, although the magnetic chips can be stacked, the joining operation becomes difficult due to a strong magnetic repulsion. The problem arises.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and can prevent the magnetic chip from falling down due to the influence of magnetic leakage, and the above-mentioned problems in increasing the area of the magnetic guide table. It is an object of the present invention to provide a play equipment that can avoid the problem.

[0007]

According to a first aspect of the present invention, there is provided a playground equipment in which a magnetic chip is attracted to an upper surface of a magnetic metal plate arranged on a magnet. And a magnetic shield circuit is formed by arranging a ferromagnetic metal plate on the upper surface or on the upper surface and the lower surface of each magnet.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 to FIG.
FIGS. 1 and 2 are cross-sectional views, perspective views, and perspective views, respectively, illustrating a playground equipment according to an embodiment of the present invention.
FIG. 3 is a configuration diagram illustrating a magnetic shielding circuit of the magnetic induction table.
FIG. 4 is a diagram for explaining a magnetic effect applied to a magnetic chip on a magnetic induction table.

In FIG. 1, reference numeral 1 denotes a playground equipment, which comprises a non-magnetic synthetic resin case 2, a magnetic guide table 3, and thin magnetic chips 4a to 4e. Each of the magnetic chips 4a to 4e is formed of an animal, a plant, or the like, and the surfaces thereof are colored to improve the appearance.

The resin case 2 has an upper wall 5a and a side wall 5b.
Are formed integrally with a hollow rectangular parallelepiped case body 5 and a bottom cover 6 is provided at the lower surface opening.
Are formed with two insertion holes 5c, 5c. A groove 5d is formed in the rear edge of the case body 5 in the longitudinal direction thereof, and a background board 7 on which a landscape image for enhancing the design effect is printed is detachably inserted. ing.

The magnetic guide table 3 includes ferromagnetic metal plates 12, 13 made of iron, nickel, cobalt, or an alloy thereof on the upper and lower surfaces of a pair of annular (donut-shaped) permanent magnets 10, 11. The metal plates 12 and 13 are fixed to the permanent magnets 10 and 11 by suction. The upper metal plate 12 is disposed on the upper wall 5a of the case main body 5, and each of the permanent magnets 1
Reference numerals 0 and 11 are inserted and supported in insertion holes 5c and 5c of the upper wall 5a. The lower metal plate 13 is supported by four protrusions 6a, 6a integrally formed on the inner surface of the bottom cover 6. The projections 6a are formed mainly for the purpose of molding the case 2 or for the purpose of adjusting the height of the guide table 3, and are omitted here.
The metal plate 13 may be directly disposed on the top.

The permanent magnets 10 and 11 are arranged in parallel with their magnetic poles (N pole and S pole) facing in the same direction. The magnetic force of each magnet 10 and 11 is
3 is almost completely shielded. That is, as shown in FIG. 3, the magnetic force lines 15 of each of the permanent magnets 10 and 11 pass through the upper metal plate 12 and flow from the edge into the lower metal plate 13, thereby forming a magnetic shielding circuit. .
Here, in forming the magnetic shielding circuit, the thickness of each of the metal plates 12 and 13 is appropriately set according to the magnetic force of the permanent magnets 10 and 11.

Next, the operation and effect of this embodiment will be described. The playground equipment 1 of the present embodiment is configured to play a three-dimensional model by freely combining and stacking the magnetic chips 4a to 4e on the upper metal plate 12 of the magnetic guide table 3. is there.

According to this embodiment, the ferromagnetic metal plate 12,
13 forms a magnetic shielding circuit that almost completely shields the magnetic force of the permanent magnets 10 and 11, so that magnetic leakage from the upper metal plate 12 is almost shut off, and the magnetic chips 4a to 4e can be prevented from falling down. At the same time, the fallen magnetic chips 4a to 4e can be easily raised. This facilitates the construction of a model when the thin magnetic chips 4a to 4e are used. That is, as shown in FIG. 4, when the iron plate 12 is disposed on the two same-polarity magnets 10 and 11, without the chip 4, the lines of magnetic force coming out of the magnet 10 pass through the iron plate 12 (see FIG. 4). 3)
There is almost no magnetic leakage to the upper surface of the iron plate 12. Here, when the chip 4 is placed on the iron plate 12, a part of the magnetic force lines
A closed magnetic circuit is formed between the iron plate 12 and the chip 4 through the magnetic path indicated by, and there is almost no magnetic leakage from the chip 4. As described above, according to the present invention, the chip 4 and the upper portion of the iron plate have almost no magnetic leakage, so that the tip 4 is prevented from falling down due to magnetic repulsion between the two.

Also, as shown in FIGS.
The first-stage magnetic chip 4a placed on the metal plate 12 is strongly magnetized by the magnetism passing through the inside of the metal plate 2 (broken lines B1 and A).
1), the adsorbing force with the magnetic chip 4b in the second stage is stronger than in the case of the metal plate 12, and it is easy to stack three or four stages.

In the present embodiment, the magnetic poles of the permanent magnets 10 and 11 are oriented in the same direction, and one metal plate 12 and 13 is disposed on each of the magnets 10 and 11 so that the above-mentioned different poles are connected. In this case, it is possible to avoid both the problem that the magnetic chips cannot be stacked, as in the case where the magnetic poles are stacked, and the problem that the joining operation by the repulsive force becomes difficult, as in the case where the same poles are joined. As a result, the stage area of the magnetic guide table 3 can be set large, and the degree of freedom of the structure can be improved accordingly, and the above-mentioned increase in demand can be coped with.

In the above-described embodiment, the case where two magnets are used has been described. However, the present invention may be configured with three or more magnets, and the magnetic induction table may be constituted. The magnets may be oriented in the same direction, and a ferromagnetic metal plate for forming a magnetic shielding circuit may be arranged for each magnet.

In the above embodiment, the case where the side edges of the upper and lower metal plates 12 and 13 are surrounded by the side wall 5b of the case body 5 made of a non-magnetic resin has been described, but the present invention is not limited to this. However, only the upper metal plate 12 may be used as the ferromagnetic metal plate. In this case, as shown in FIG. 8, the magnetic force on the guide table 3 is slightly reduced as compared with the case where the metal plates 12 and 13 are used for the upper and lower parts (see FIG. 7). The magnetic forces are averaged.

In the above-described embodiment, an example using thin magnetic chips 4a to 4e has been described. However, the present invention is not limited to this, and various forms such as sphere, column, and thick plate are used. Can be used.

FIGS. 5 to 9 show the results of tests performed to confirm the effects of the present embodiment. In this test, two (FIGS. 5 to 8) or one (FIG. 9) annular magnets each having an outer diameter of 60 mm × an inner diameter of 32 mm × a thickness of about 1400 G and having a thickness of 1400 G were used. An iron plate of 0.6 mm (FIGS. 5 to 8) or 0.8 mm (FIG. 9) is arranged to produce a magnetic guide table, and the magnetic flux density of the magnetic guide table is measured by a Gauss meter [GT-3 manufactured by Nihon Denki Sokki Co., Ltd.].
B]. In addition, the code | symbol in a figure shows the same code | symbol as FIG. The arrangement of the magnets in FIGS.

FIG. 5 shows the measured values of the magnetic flux density at the center and the outer periphery of the magnetic induction table when one iron plate is used above and below the magnet. As can be seen from the figure, the central portion is 48 to 154 G, and the outer peripheral portion is 145 to 378 G, which is slightly higher than the central portion, but it can be seen that a magnetic shielding circuit is almost formed as a whole.

FIG. 6 shows the case where one iron plate (A), one upper and lower one (B), two upper and lower one (C), and three upper and lower one (D) are used on the magnet. The distribution state of the magnetic flux density in the longitudinal direction of the magnetic guide table (on the line JJ in FIG. 5; the same applies to FIGS. 7 to 8) is shown by a line graph. As is clear from the figure, it is understood that the magnetism is shielded and averaged over almost the entire area of the metal plate except for both edges. In addition, it can be seen that the greater the number of iron plates used on the magnet, the more the magnetism is averaged, and the more the iron plate is used below, the greater the magnetic flux density on the upper surface of the guide table.

FIG. 7 shows a magnetic induction table (B0), a top surface of a first magnetic chip (B1), a top surface of a second magnetic chip (B2), and a case where one iron plate is used above and below a magnet. The distribution state of the magnetic flux density in the longitudinal direction of the magnetic induction table on the upper surface (B3) of the third chip is shown by a line graph. As is clear from the figure, the guide board upper surface (B0)
The upper surface (B1, B2, B3) of each magnetic chip has a larger magnetic force than the upper surface (B1) of the first magnetic chip.
It can be seen that 1) is the largest.

FIG. 8 shows a magnetic induction table (A0), a top surface of a first magnetic material chip (A1), a top surface of a second magnetic chip (A2), and a case where one iron plate is used on a magnet. The distribution state of the magnetic flux density in the longitudinal direction of the magnetic guide table on the upper surface (A3) of the third chip is shown by a line graph. As in FIG. 8, the magnetic force is larger on the upper surface (A1, A2, A3) of each magnetic chip than on the upper surface (A0) of the guide table.
The upper surface (A1) of the first magnetic chip is the largest.
However, the magnetic flux density on the upper surface of the guide table and the upper surface of each magnetic chip is slightly lower than that in the case of FIG. On the other hand, magnetism is more averaged.

FIG. 9 shows a case where one annular magnet used in FIGS. 4 to 8 is used, and an iron plate having a thickness of 0.8 mm and a radius of 60 mm is used on one or both sides of the magnet (including the case where it is not used). ), The magnet upper surface (a) or the iron plate when using only the magnet (a), the upper one (b), the upper two (c), the lower one (d) and the upper and lower ones (e) Top surface (b
The distribution state of the magnetic flux density in the radial direction of (e) is shown by a line graph. In the case of the magnet alone (a) or the case where one iron plate is used under the magnet (d), the magnetic flux density fluctuates drastically. However, one (b) to two (c) iron plates are used on the magnet, It can be seen that when one upper and lower sheet is used (e), the magnetic force on the iron plate is averaged.

[0026]

In the playground equipment according to the present invention, a plurality of magnets are arranged in parallel with their magnetic poles facing in the same direction.
Alternatively, a magnetic shield circuit is formed by arranging ferromagnetic metal plates on the upper and lower surfaces, which has the effect of preventing the magnetic material chip from falling down due to magnetic leakage, and increasing the area of the magnetic induction table to increase the degree of freedom of the structure. There is an effect that can be improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention (one iron plate above and below a magnet,
FIG. 3 is a cross-sectional front view for explaining the play equipment according to the first embodiment (use of two sheets) (a cross-sectional view taken along line II of FIG. 2).

FIG. 2 is a perspective view of the play equipment.

FIG. 3 is a configuration diagram showing a magnetic shielding circuit of a magnetic induction table of the play equipment.

FIG. 4 is a diagram for explaining a magnetic effect exerted on an iron plate and a magnetic chip on the magnetic induction table of the present invention.

FIG. 5 is a diagram showing a measurement result of a magnetic flux density on the upper surface of the magnetic induction table.

FIG. 6 is a characteristic diagram showing a distribution state of magnetic flux density in a longitudinal direction of the magnetic induction table when the number of used iron plates is changed (on the line JJ in FIG. 5).

FIG. 7 is a characteristic diagram showing distribution states of magnetic flux densities on a magnetic induction table and a magnetic chip when one iron plate is used above and below a magnet.

FIG. 8 is a characteristic diagram showing a distribution state of a magnetic flux density on a magnetic induction table and a magnetic chip when one iron plate is used on a magnet.

FIG. 9 is a characteristic diagram showing the distribution of magnetic flux density in the longitudinal direction on the magnet and on the iron plate when the number of used iron plates is changed.

FIG. 10 is a diagram showing a problem when a conventional product is arranged with different poles.

FIG. 11 is a diagram showing a problem when a conventional product is arranged with the same polarity.

FIG. 12 is a view showing a problem of the magnetic chip falling down in a conventional product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Playground equipment 4a-4e Magnetic chip 10, 11 Magnet 12, 13 Ferromagnetic metal plate

Claims (1)

[Claims] 1. A plaything in which a magnetic chip is attracted to an upper surface of a magnetic metal plate arranged on a magnet, a plurality of magnets are arranged in parallel with their magnetic poles facing in the same direction, and the upper surface of each magnet is Alternatively, a playground equipment wherein a magnetic shielding circuit is formed by disposing a ferromagnetic metal plate on an upper surface and a lower surface.