JP3042992U - 3D magnetic field line observer - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To observe magnetic force lines three-dimensionally in three dimensions, sufficiently display magnetic force lines of magnetic poles, and also to observe magnetic force lines of repulsive magnetic fields due to the same poles of magnets. It will be used as a stereoscopic magnetic field line observer to deepen the understanding of the magnetic field. SOLUTION: A transparent rectangular parallelepiped sealed container 2, a transparent liquid filled in the sealed container and mixed with a magnetic powder 15 and a pair of side surfaces 5 and 7 facing each other of the sealed container 2 are provided.
In order to insert one pole of the magnetic pole of the magnet, transparent hollow bodies 10 and 10 'each having a substantially circular cross-section formed by projecting from the outside to the inside, the base end being open, and the tip being closed. ,
The three-dimensional magnetic force line observer 1 is provided. In addition, the white plate 1 which is L-shaped in side view and covers the lower surface 8 and the back surface 4 of the sealed container 2.
The three-dimensional magnetic field line observer 1 including

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a magnet for magnetic fields in science such as school children and a stereoscopic magnetic field line observer used for learning magnetic field lines, and more particularly to a stereoscopic magnetic field line observer capable of stereoscopically observing magnetic field lines of mutually repulsive magnetic fields due to the same pole of a magnet. It is a thing.

[0002]

[Prior art]

 In the past, when learning magnets and magnetic lines of force, iron powder was directly attached to the magnets, or iron powder was placed on paper or glass, and the magnets were brought closer from below, so that the iron powder on the paper or glass became magnetic lines of force. The lines of magnetic force were observed along a plane. However, the magnetic field lines cannot be three-dimensionally observed three-dimensionally only by observing the iron powder arranged along the magnetic field lines on such paper or glass, and the original appearance of the magnetic field lines and the magnetic field can be seen. It was impossible to understand. Therefore, as shown in FIG. 8, for example, a transparent container 31 is filled with a transparent liquid in which fine magnetic powder 32 is mixed, and a hollow tube 33 is inserted into the side surface of the container. In addition, there is a three-dimensional magnetic field line observing device 36 in which the bar magnet 35 is inserted and removed so that the magnetic field lines can be three-dimensionally observed.

[0003]

[Problems to be solved by the device]

 By the way, in the three-dimensional magnetic field line observer with a hollow tube penetrating as described above, the magnetic field lines of the magnetic poles at both ends of the bar magnet are obstructed by the hollow tubes and important parts are missing, so that the magnetic field lines of the magnetic pole part are sufficiently displayed. There was a problem that students could not understand, and they could not fully understand. Also, with a three-dimensional magnetic field line observer having a hollow tube penetrating it, it was extremely difficult to three-dimensionally observe the magnetic field lines of magnetic fields that repel each other due to the same poles of the magnets.

Therefore, the present invention is configured so that the magnetic force lines can be three-dimensionally observed three-dimensionally, the magnetic force lines of the magnetic pole portions can be sufficiently displayed, and the magnetic force lines of repulsive magnetic fields due to the same poles of the magnets can be three-dimensionally observed. The object of the present invention is to provide a three-dimensional magnetic field line observer that solves the above-mentioned problems.

[0005]

[Means for Solving the Problems]

 The present invention has been made in view of the above circumstances, and includes a transparent rectangular parallelepiped-shaped hermetically sealed container, a transparent liquid filled in the hermetically sealed container, in which magnetic powder is mixed, and the opposing of the hermetically sealed container. In order to insert one pole of the magnetic pole of the magnet on each of the pair of side surfaces, it is projected from the outside to the inside, the base end is open, and the tip is closed. The three-dimensional magnetic force line observer is characterized in that it has a body and can hold the bar magnet by inserting one pole of each pole magnet into the pair of hollow bodies. Further, the three-dimensional magnetic field line observer is characterized by comprising a white plate having an L-shape in a side view, which covers the lower surface and the back surface of the hermetically sealed container. Further, it is characterized by comprising a transparent case placed on the upper surface of the hermetically sealed container and a magnetic pole sensor made of a spherical magnet which is housed in the transparent case and is rollable and color-coded into an N pole and an S pole. And a three-dimensional magnetic field line observation device. Further, a three-dimensional magnetic field line observer is provided, which supports the white plate and includes a base and a stand composed of a pole erected on the base. Further, the three-dimensional magnetic force line observer is characterized in that the base of the stand is Z-shaped in a plan view.

[0006]

[Embodiment of the invention]

 An embodiment of a three-dimensional magnetic field line observer according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a three-dimensional magnetic force line observing device. As shown in FIG. 1, the three-dimensional magnetic force line observing device 1 has a container body 2. The container body 2 has a rectangular parallelepiped shape and includes an upper plate 3, side plates 4, 5, 6, 7 and a bottom plate 8 and a pair of left and right hollow bodies 10 and 10 'described later, which are integrally formed of transparent plastic or glass. The inside can be seen through.

In addition, substantially cylindrical hollow bodies 10 and 10 ′ whose front ends are closed and whose base ends are opened are laterally provided substantially at the centers of the side plates 5 and 7 facing each other. Openings 10a and 10a 'are formed at the base ends, that is, at the fixing points with the side plates 5 and 7. Further, the horizontal lengths of the hollow bodies 10 and 10 'are preferably about 10 to 20% of the horizontal length of the container main body 2, and the diameters of the hollow bodies 10 and 10' are round bar magnets. The hollow body 10 and 10 ′ has a size that can be stored in a state where it does not rattle, and the outer peripheral corners of the tips of the hollow bodies 10 and 10 ′ are rounded so that the corner portions also have a uniform thickness. Then, a through hole for injecting the liquid is formed in any one of the upper plate 3 and the side plates 4, 5, 6, 7 of the container body 2, and the plug 12 is inserted into this through hole. ing.

The inside of the container body 2 is filled with a liquid in which fine magnetic powder 15 is mixed. Iron powder, iron oxide, or the like is used as the magnetic powder 15, and the powder has a needle-like shape, which makes it easy to display lines of magnetic force. The liquid in which the magnetic substance powder 15 is mixed is a liquid such as liquid paraffin that is transparent and viscous, and has the characteristics that the magnetic substance powder 15 does not easily settle and is easy to see.

Then, the plate provided with the through holes is directed upward, the plug 12 is removed, and the liquid containing the magnetic powder 15 is injected from the injection hole which is the through hole, so that the inside of the container body 2 is When filled with this liquid, the plug 12 is inserted into the injection port which is a through hole to fill the inside of the container body 2 with this liquid. It has settled on the bottom plate 8.

Further, the container body 2 is placed on a white plate 17 which is L-shaped in a side view. As shown in FIG. 2, the white plate 17 is composed of a bottom plate 17a, a side plate 17b standing on one side of the bottom plate 17a, and an edge plate 17c standing on the other side of the bottom plate 17a. A screw hole 17d is screwed in substantially the center of 17a. The container body 2 is placed on the bottom plate 17a so as to be sandwiched between the side plate 17b of the white plate 17 and the edge plate 17c, and the magnetic force lines of the black magnetic powder 15 are applied by the bottom plate 17a and the side plate 17b of the white plate 17. Appears more clearly and is easier to see.

The white plate 17 is supported by a stand 19. As shown in FIG. 3, the stand 19 is formed of a Z-shaped base 20 having a Z-shape in plan view and a pole 21 erected on the Z-shaped base 20. Screws 21a and 21b are provided on the upper and lower ends of the pole 21, respectively, and the upper screw 21a is screwed into the screw hole 17d of the white plate 17, while the lower screw 21b penetrates the Z-shaped base 20 at substantially the center thereof. It is inserted in the hole and fastened by the nut 22.

FIG. 4 is a perspective view showing a magnetic pole sensor. The magnetic pole sensor 23 is a cylindrical case 24 made of transparent plastic, and a spherical ball that is sealed in the cylindrical case 24 and is rollable. This spherical magnet 25 is color-coded into a hemispherical north pole and south pole, respectively. The magnetic poles can be visually detected depending on the positions of the north pole and the south pole of the spherical magnet 25 in a stopped state. ing.

Next, a usage state of observing the magnetic force lines of the magnet using the three-dimensional magnetic force line observer 1 according to the present invention will be described with reference to FIGS. 5 to 7. FIG. 5 is a side view showing a usage state in which different poles of a pair of round bar magnets are set in a three-dimensional magnetic force line observer, and FIG. 6 is a front view thereof. First, the container body 2 is shaken sufficiently, and the fine magnetic powder 15 in the container body 2 is uniformly dispersed in the liquid in a suspended state.

Next, in this state, as shown in FIGS. 5 and 6, the S pole of one round bar magnet 27 is inserted into the hollow body 10 through the opening 10 a of the side plate 5, and the other round bar magnet 27 is inserted. The N pole is inserted into the hollow body 10 'through the opening 10a' of the side plate 7, or the N pole of one round bar magnet 27 is inserted into the hollow body 10 and the S pole of the other round bar magnet 27 is inserted into the hollow body. If the magnetic poles inserted into the pair of hollow bodies 10 and 10 'are set so that the magnetic poles are different (different poles), the round bar magnets 27 and 27 come out from the magnetic poles N and S. The magnetic material powders 15 are arranged along the lines of magnetic force so as to draw a radial arc.

At this time, there are no obstacles between the magnetic poles N and S that block the magnetic force lines, and the magnetic powder 15 is arranged seamlessly along the magnetic force lines between the magnetic poles N and S. Is displayed without interruption and more faithfully, and magnetic field lines can be observed three-dimensionally in three dimensions. Also, the hollow bodies 10 and 10 'only cover the magnetic poles at one end of the pair of round bar magnets 27, 27, and the magnetic field lines are displayed three-dimensionally almost faithfully near the most important magnetic poles N and S. You can

Further, since the corners of the outer periphery of the tips of the hollow bodies 10, 10 ′ are rounded and the corner portions have the same thickness as other portions, the hollow bodies 10, 10 ′ have a uniform thickness. In the surroundings, the magnetism of the round bar magnet 27 is obtained uniformly, and the magnetic force lines can be displayed more faithfully. Further, the magnetic field lines due to the black magnetic substance powder 15 are more clearly projected by the bottom plate 17a and the side plates 17b of the white plate 17, so that the magnetic field lines can be more three-dimensionally and three-dimensionally observed.

When the magnetic pole sensor 23 is placed substantially in the center of the upper surface of the container body 2, the N pole of the spherical magnet 25 faces the S pole side of the round bar magnet 27 as shown in FIG. The S pole is directed toward the N pole side of the round bar magnet 27, and the N pole and the S pole with well-balanced magnetic forces stop rolling at the lateral position. The direction and magnetic pole can be visually sensed.

When the observation of the lines of magnetic force is completed, the magnetic powder 15 is released from the influence of the magnetic force of the round bar magnets 27, 27 by taking out the round bar magnets 27, 27 from the hollow bodies 10, 10 ′. Then, since it settles on the bottom plate 8 due to its own weight, the state of the magnetic field due to the lines of magnetic force can be repeatedly observed in the same manner as described above by repeating the above procedure again.

FIG. 7 is a side sectional view showing a usage state in which the same poles of a pair of round bar magnets are set in the three-dimensional magnetic force line observer. As shown in FIG. After diffusing the body powder 15 in the liquid in a uniformly floating state, the N pole of one round bar magnet 27 is inserted into the hollow body 10 through the opening 10a of the side plate 5, and the N pole of the other round bar magnet 27 is inserted. The pole is inserted into the hollow body 10 'through the opening 10a' of the side plate 7, or the S pole of one round bar magnet 27 is inserted into the hollow body 10 and the S pole of the other round bar magnet 27 is inserted into the hollow body. When the magnetic poles inserted into the pair of hollow bodies 10 and 10 'are set so that the magnetic poles inserted therein are the same (same pole), the magnetic poles N and N (or the magnetic pole S, The magnetic powders 15 are arranged in a radial arc along the lines of magnetic force emanating from S), and The state of the magnetic field emitted can be observed.

At this time, when the magnetic pole sensor 23 is placed substantially in the center of the upper surface of the container body 2, the S pole of the spherical magnet 25 faces the N pole side of the pair of round bar magnets 27, 27 as shown in FIG. The S pole with a balanced magnetic force stops rolling at the downward position, which allows the magnetic pole of the round bar magnet 27 to be visually sensed.

Although the Z-shaped base 20 is used as the stand in the above-described embodiments, the present invention is not limited to this, and it is of course possible to use a base of another shape such as a disc-shaped base. is there. Further, in the above-described embodiment, the round bar magnet is inserted into the hollow bodies 10 and 10 ', but the present invention is not limited to this, and it goes without saying that a bar magnet having a rectangular cross section may be inserted.

[0022]

[Effect of the invention]

 As described above, according to the present invention, the pair of hollow body portions only cover the magnetic poles at one end of each of the pair of bar magnets, and there is no obstacle between the magnetic poles that blocks the magnetic field lines. In addition, the magnetic powders are arranged seamlessly along the magnetic field lines between both magnetic poles, the magnetic field lines are displayed more faithfully and more faithfully, and the magnetic field lines can be three-dimensionally observed. Further, the pair of hollow bodies only cover the magnetic poles at one end of each of the pair of bar magnets, and the magnetic field lines can be displayed in a three-dimensional manner almost faithfully in the vicinity of the most important magnetic poles. Also, by setting the same poles of a pair of bar magnets in a pair of hollow bodies, it is possible to observe the state of magnetic fields that repel each other.

In addition, the white plate makes the magnetic field lines of the black magnetic powder stand out more clearly so that the magnetic field lines can be observed three-dimensionally in a three-dimensional manner, making it easier for students to experiment with science magnets and magnetic field lines in school education. You can deepen your understanding and interest. Further, the magnetic poles of the bar magnets inserted in the hollow body of the sealed container can be clearly detected visually by the stop positions of the north and south poles of the spherical magnet of the magnetic pole sensor. Moreover, since the white plate and the hermetically sealed container are lifted up and supported near the eyes by the stand, the magnetic field lines can be observed more easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a three-dimensional magnetic force line observer according to the present invention.

FIG. 2 is a perspective view showing a white plate of a three-dimensional magnetic field observer according to the present invention.

FIG. 3 is a perspective view showing a stand of a three-dimensional magnetic field observer according to the present invention.

FIG. 4 is a perspective view showing a magnetic pole detector of a three-dimensional magnetic field observer according to the present invention.

FIG. 5 is a side view showing a usage state in which different poles of a pair of round bar magnets are set in the three-dimensional magnetic force line observer according to the present invention.

FIG. 6 is a front view showing a usage state in which different poles of a pair of round bar magnets are set in the stereoscopic magnetic force line observer according to the present invention.

FIG. 7 is a side view showing a usage state in which the same poles of a pair of round bar magnets are set in the three-dimensional magnetic force line observer according to the present invention.

FIG. 8 is an explanatory view illustrating a usage state of a stereoscopic magnetic force line observing device in which a hollow tube is inserted through a side surface of a conventional container.

[Explanation of symbols]

 1 three-dimensional magnetic force line observer 2 container body 3 upper plate 4, 5, 6, 7 side plate 8 bottom plate 10, 10 'hollow body 10a, 10a' opening 12 plug 15 magnetic powder 17 white plate 19 stand 20 Z-shaped base 23 magnetic pole Sensor 25 spherical magnet

Claims (5)

[Utility model registration claims] 1. A transparent rectangular parallelepiped-shaped hermetic container, a transparent liquid filled in the hermetic container and mixed with a magnetic powder, and a pair of side surfaces facing each other of the magnetic pole of a magnet. In order to insert one pole, it is provided with a transparent hollow body that is protruded from the outside to the inside, has a base end opened, and has a closed front end, and has a substantially circular cross section. A three-dimensional magnetic field line observer characterized in that each pole can be held by inserting one pole of the pole magnet. 2. The stereoscopic magnetic field line observer according to claim 1, further comprising a white plate having an L shape in a side view, which covers a lower surface and a back surface of the hermetically sealed container. 3. A magnetic pole sensor, which is placed on the upper surface of the hermetically sealed container, and includes a transparent case and a spherical magnet, which is housed in the transparent case and is rollable and color-coded into N and S poles. The three-dimensional magnetic force line observer according to claim 1 or 2. 4. The stereoscopic magnetic field line observer according to claim 2, further comprising a stand that supports the white plate and that includes a base and a pole installed upright on the base. 5. The stereoscopic magnetic field line observer according to claim 4, wherein the base of the stand is Z-shaped in a plan view.