JPH05197341A - Rotary type display device - Google Patents

Abstract

PURPOSE:To prevent the erroneous rotation of display bodies by preventing the magnetic interference between the adjacent display bodies. CONSTITUTION:This display device consists of plural display rotating bodies 111 to 11n which consist of the peripheral surfaces of cylindrical plastic magnets 11a as display surfaces, a revolving shaft 13 which freely rotatably supports the respective display rotating bodies and is constituted of a synthetic resin having excellent sliding characteristics, electromagnet mechanisms 141 to 14n for excitation which are provided on the outside of the display rotating bodies and slide and rotate the display rotating bodies with respect to the revolving shaft 13 by variably controlling the excitation polarities of a pair of the electromagnets 15, 16 opposite to the magnets, and a magnetic member 17 for preventing the magnetic interference which is disposed adjacent to the peripheral surfaces of the respective display rotating bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary display device used for displaying image information, for example.

[0002]

2. Description of the Related Art A rotary display device of this kind is known, for example, from Japanese Patent Application Laid-Open No. 56-159685. As shown in FIG. 16, the permanent magnet 2 is fixed to the rotary shaft 1 and the outer peripheral portion of the permanent magnet 2 is covered with a cylindrical display body 3 to be integrated, so that the rotary shaft 1 can be freely rotated on the substrate shelf board portion. Is supported by. The permanent magnet 2 and the display body 3 are rotationally driven by an exciting electromagnet mechanism 4 provided outside. That is, the exciting electromagnet mechanism 4 has a pair of electromagnets 5 and 6 arranged on the left and right, respectively.
Each has a pair of exciting coils 5a, 5b, 6a, 6b
Is provided.

In this rotary display device, the electromagnet 5 has an N pole,
When the electromagnet 6 is excited so as to have the S pole, the left side of the permanent magnet 2 becomes the S pole and the right side of the permanent magnet 2 stops, as shown in FIG. When the electromagnets 5 and 6 are excited from this state so that both are S poles, the permanent magnet 2 stops with the lower pole being the N pole and the upper pole being the S pole, as shown in FIG. 16 (b). When the electromagnet 5 is further excited from this state so that the electromagnet 5 becomes the S pole and the electromagnet 6 becomes the N pole, the permanent magnet 2 stops with the N pole on the left side and the S pole on the right side, as shown in FIG. 16 (c). From this state, when the electromagnets 5 and 6 are further excited so as to have both N poles, the lower side of the permanent magnet 2 becomes the S pole and the upper side thereof becomes the N pole and stops as shown in FIG. 16 (d).

By changing the exciting magnetic polarities of the electromagnets 5 and 6 in this manner, the permanent magnet 2 rotates, and thereby the display body 3 rotates.

[0005]

However, when a large number of such rotary display devices are arranged close to each other on the peripheral surface side orthogonal to the display direction of the display body 3, magnetic interference occurs and a certain rotary display device is displayed. When the display body 3 rotates, the display body 3 of the rotation display device adjacent to the display body 3 rotates, and as a result, the display surface is displaced.

Therefore, the present invention is intended to provide a rotary display device capable of preventing magnetic interference between adjacent display bodies, and thus preventing the adjacent display bodies from being erroneously rotated by the rotation of the display bodies. To do.

[0007]

The invention according to claim 1 is
A display rotator having a peripheral surface as a display surface and permanent magnets arranged along the peripheral surface, a support rotatably supporting the display rotator, and a display rotator provided outside the display rotator. Excitation drive means for variably controlling the exciting magnetic pole property facing the permanent magnet of the display rotor and slidingly rotating the display rotor with respect to the support, and the display on at least one of the peripheral surfaces orthogonal to the display direction of the display rotor. The magnetic member for preventing magnetic interference is provided adjacent to the peripheral surface of the rotating body.

According to a second aspect of the present invention, a support body that rotatably supports a plurality of display rotary bodies on one axis and a support magnet that is provided outside each display rotary body and faces the permanent magnet of each display rotary body. A plurality of exciting drive means for variably controlling the exciting magnetic property to slide and rotate each display rotor with respect to the support, and each display on at least one of the peripheral surfaces orthogonal to the display direction of each display rotor. A magnetic member for preventing magnetic interference is provided, which is arranged adjacent to the peripheral surface of the rotating body and fixes a part of the support and the excitation drive means to form a unit.

According to a third aspect of the present invention, the display surface of the display rotary member is positioned in the display direction with respect to a plurality of stable points obtained by magnetic interaction with the magnetic member for preventing magnetic interference. It has been set.

According to a fourth aspect of the present invention, when the display rotating body is horizontally oriented so that the magnetic member for preventing magnetic interference is located above and below the display rotating body, the magnetic member for preventing magnetic interference on the upper side is provided. The force acting between the member and the display rotating body is F ₁ ,
Assuming that the force acting between the magnetic member for preventing magnetic interference on the lower side and the display rotor is F ₂ , the mass of the display rotor is m, and the gravitational acceleration is g, 0 <F ₁ −F ₂ <2 mg. In addition, the magnetic member for preventing magnetic interference on the upper side is arranged closer to the display rotating body than the magnetic member for preventing magnetic interference on the lower side.

According to a fifth aspect of the present invention, a display rotor having a peripheral surface as a display surface, permanent magnets arranged along the peripheral surface, and a plurality of display rotors arranged in the axial direction are provided outside the display rotors. Excitation driving means provided for rotatably rotating each display rotor by variably controlling the exciting magnetic properties of the respective display rotors facing the permanent magnets, and the circumference of each display rotor orthogonal to the display direction of each display rotor. Comb-tooth-shaped first magnetic shield members arranged so that the surface portions are sandwiched by the tooth portions, and the display rotors are rotatably supported, and the end face portions of the display rotors are sandwiched from both sides. The second magnetic shielding member arranged is provided.

[0012]

By changing the exciting magnetic pole characteristic of the display rotating body facing the permanent magnet by the exciting drive means, the polarity of the permanent magnet moves in a direction to attract the exciting magnetic pole, and the display rotating body slides on the rotating support. Rotate dynamically. As a result, the display surface rotates and the display changes. At this time, the magnetic member for preventing magnetic interference prevents the magnetic force lines generated from the excitation drive means from acting on the permanent magnets of the adjacent display rotating body.

Further, by varying the exciting magnetic polarities facing the permanent magnets of the corresponding display rotating body by a plurality of exciting driving means, the polarities of the corresponding permanent magnets move in the directions of attracting the respective exciting magnetic polarities, and each display rotation. The body slides individually and independently with respect to the rotary support.

Further, in the non-excitation state in which the excitation by the excitation drive means is stopped, the display rotor is positioned at the stable point, and the display surface of the display rotor is positioned in the display direction at this time.

Further, since the upper magnetic interference preventing magnetic member is arranged closer to the display rotor than the lower magnetic interference preventing magnetic member so that 0 <F ₁ -F ₂ <2 mg, Friction generated on the display rotating body in the non-excited state is reduced, and the display surface is accurately positioned in the display direction.

Further, the first magnetic shield member having a comb tooth shape and arranged so as to sandwich the peripheral surface portion of each display rotary body orthogonal to the display direction of each display rotary body from both sides, and each display rotary body is rotated. Since the second magnetic shield member which is freely supported and arranged so as to sandwich the end face portion of each display rotary member from both sides is provided, each display rotary member is provided with the tooth portion of the first magnetic shield member and the first magnetic shield member. A space is formed between the two magnetic shield members and a tooth portion of the first magnetic shield member that surrounds the adjacent display rotating body. Therefore, the magnetic flux that comes out of the display rotary member and enters the tooth portion of the first magnetic shield member hardly flows into the tooth portion of the first magnetic shield member that surrounds the adjacent display rotor member, so that the magnetic flux of the second magnetic shield member does not flow. It enters into the display rotating body from the tooth portion of the first magnetic shield member which is opposed to the display rotating body. As a result, almost no magnetic flux flows into the adjacent display rotating body.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a plurality of display rotating bodies 11 are provided.
_1, 11 _2, 11 _3, a ... 11 _n on both sides, respectively, the partition member 12, 12 is superior in sliding properties is provided ... rotatable about a rotation shaft 13 as a support through. Partition member 1
Suitable examples of 2 include plastics such as nylon, Teflon, and polyacetal, and bakelite.

The rotary shaft 13 is made of, for example, general-purpose engineering plastic such as polyacetal, Teflon resin, or nylon, or synthetic resin material such as polyamide or polyamideimide having excellent heat resistance, which has excellent sliding characteristics. When the device is used outdoors in a place exposed to direct sunlight, it has excellent heat resistance and can maintain mechanical strength and sliding characteristics even in a high temperature atmosphere.
PS. PES. PEEK or the like may be used. In some cases, a metal material that is lightweight and has excellent mechanical strength may be used. In this case, the slidability can be easily improved by coating the metal part with a heat-shrinkable tube of Teflon.

Further, reduction of friction coefficient, improvement of wear resistance,
Glass fibers, carbon fibers, inorganic fillers, or the like may be used to improve the mechanical strength, and a special additive for imparting sliding characteristics may be added thereto. As the special additive material, there are PTFE powder, graphite, carbon fiber, molybdenum disulfide and the like. Further, a lubricating oil may be contained in the polymer to improve slidability.

Each of the display rotors 11 _{1 to} 11 _n is composed of a cylindrical plastic magnet 11a as shown in FIG. 3, and the display color is applied to the peripheral surface of the plastic magnet 11a by changing the display color every 90 °. Alternatively, it covers the tube 11b which is printed and used as a display surface.

In this case, the display surface may be formed by applying or printing the display color directly on the peripheral surface of the plastic magnet 11a without using the tube 11b.

The plastic magnet 11a is a cylinder required by injection molding or compression molding by mixing magnetic powder such as S _{m Co} , N _{d Fe} , _{Fe 2} O ₃ into a resin such as nylon in a required weight ratio. It is formed into a shape.

An exciting electromagnet mechanism 1 is provided as an exciting drive means outside each of the display rotating bodies 11 _{1 to} 11 _n .
4 ₁ , 14 ₂ , 14 ₃ , ... 14 _n are arranged.

The exciting electromagnet mechanisms 14 _{1 to} 14 _n are composed of a pair of electromagnets 15 and 16 as shown in FIG. 2. Each of the electromagnets 15 and 16 has exciting yokes 15 a and 16 a and exciting coils 15 b and 16 b. It is configured by winding.

Specifically, each of the display rotating bodies 11 ₁ to ₁ 1
As 1 _n , for example, an inner diameter of 8.2 mm, an outer diameter of 12 mm and a length of 12 mm is used.
Inserted in 3. Further, the magnetizing of the plastic magnet 11a has two poles because of the relationship with the electromagnets 15 and 16, and the magnetic flux density of the surroundings is about 100 gauss. Note that the magnetic flux density is determined by the relationship with the exciting force of the electromagnets 15 and 16, and is also related to the strength of magnetization and the weight of the display rotating body.

Each of the electromagnets 15 and 16 has a material thickness of 0.4 mm.
Exciting yokes 15a and 16a are formed by the magnetic iron plate of No. 2 and bifilar windings having a wire diameter of 0.1 mm are wound about 200 times to form exciting coils 15b and 16b.

[0028] the one on the display rotating body 11 ₁ of the circumferential surface side perpendicular to the display direction of the display rotating body 11 ₁ to 11 _n
A magnetic interference preventing magnetic member 17 is arranged adjacent to the peripheral surface of 11 _n . The magnetic member 17 for preventing magnetic interference is H
It is made of a magnetic iron plate having a thickness of 0.3 mm and has a tip portion bent 90 °, and the shaft center portion 13a of the rotary shaft 13 is engaged and supported by the bent portion to form a unit. Of course the magnetic interference preventing magnetic member 17 the peripheral surface of each of the display rotating body 11 ₁ to 11 _n, the configuration of enclosed industry also the exciting electromagnet mechanism 14 ₁ to 14 _n, to the magnetic member 17 Is an exciting yoke 15a of each of the exciting electromagnet mechanisms 14 _{1 to} 14 _n ,
16a is fixed by adhesion or resin welding.

As described above, the n display rotating bodies 11 _{1 to} 11 _n are provided on the rotary shaft 13, and the m display units 21 ₁ to 21 ₁ to 11n are engaged with and supported by the magnetic member 17 for preventing magnetic interference. As shown in FIG. 5, 21 _m are arranged side by side to form a panel-shaped display device.

Reference numeral 23 in the drawing is a reflector, and this reflector 2
By 3, the display surface can be apparently enlarged even if the display surface is slightly narrowed, and adjacent colors are surely hidden so that only one color can be surely displayed on the display surface. It is also possible to eliminate the break between adjacent display units.

In this embodiment having such a structure, first, the display surface side of the electromagnet 15 is the N pole, and the display surface side of the electromagnet 16 is S pole.
When excited so that it becomes a pole, the display rotor 11 (11 ₁ ~
11 _n ) of the magnet 11a, the south pole is attracted to the north pole and the north pole is attracted to the south pole, so that the display rotor 11 slides on the peripheral surface of the rotary shaft 13 and is shown in FIG. As shown, the left side is the south pole and the right side is the north pole. In this state, each electromagnet 1
When the excitation of the magnets 5 and 16 is stopped, the display rotor 11 is magnetically interacted with the magnetic interference preventing magnetic members 17 located on both sides, so that the S pole and the N pole of the magnet 11a are magnetic interference preventing magnetic members 17. It is stably held at a position facing. That is, the display rotating body 11 has potential energy that is stably held at such a position when the electromagnets 15 and 16 are in the non-excited state. Then, at this stable point, one section of the display surface of the display rotating body 11 is located in the display direction.

In this state, the display surface side of the electromagnet 15 is S next.
When magnetized so that the pole and the display surface side of the electromagnet 16 are also S poles, the magnet 11a of the display rotor 11 is attracted to the S poles of the electromagnets 15 and 16 on the N pole side.
1 is obtained by rotating the peripheral surface of the rotary shaft 13 in the clockwise direction by ¼
As shown in (b), the upper side is the south pole and the lower side is the north pole. When the excitation of the electromagnets 15 and 16 is stopped in this state, the display rotor 11 stops rotating due to frictional force. Even in this state, the next section on the display surface of the display rotor 11 is positioned in the display direction.

In this state, the display surface side of the electromagnet 15 is S next.
When the magnet and the display surface side of the electromagnet 16 are excited to be the N pole, the magnet 11a of the display rotor 11 is attracted to the N pole of the electromagnet 16 on the S pole side, so that the display rotor 11 is surrounded by the peripheral surface of the rotating shaft 13. 4 further clockwise by 1/4 turn
As shown in (c), the left side is the north pole and the right side is the south pole. When the excitation of the electromagnets 15 and 16 is stopped in this state, the display rotor 11 becomes a stable point and stops rotating. Also at this stable point, the next section of the display surface of the display rotating body 11 is positioned in the display direction.

In this state, when the electromagnet 15 is further excited so that the display surface side of the electromagnet 15 is the N pole and the display surface side of the electromagnet 16 is the N pole, the magnet 11a of the display rotor 11 has the S pole side of the electromagnets 15 and 16 of the N poles. As a result, the display rotor 11 further rotates the peripheral surface of the rotary shaft 13 in the clockwise direction by ¼, and the upper side becomes the N pole and the lower side becomes the S pole as shown in FIG. 4 (d). When the excitation of the electromagnets 15 and 16 is stopped in this state, the display rotor 11 stops rotating due to frictional force. Even in this state, the next section on the display surface of the display rotor 11 is positioned in the display direction. In this way, the display rotating body 11 rotates exactly once, and the four sections on the display surface are sequentially displayed.

Excitation coil 1 of each electromagnet 15, 16
An exciting current of about 1 A is sufficient as the exciting current flowing through 5b and 16b.

In this way, by changing the exciting magnetic polarities of the electromagnets 15 and 16, the display rotor 11 is set to 1 clockwise.
It can be slid by / 4 rotation. And each one
Every 4 rotations, the display rotor 11 becomes a stable point and the electromagnet 1
Even if the excitation of Nos. 5 and 16 is stopped, it is held at that position.
Then, at each stable point position, each section of the display surface is positioned in the display direction, and accurate display without deviation can be performed. In addition,
It goes without saying that the display rotor 11 can be slidably rotated in the counterclockwise direction by 1/4 rotation by completely reversing the switching of the exciting magnetic polarities of the electromagnets 15 and 16.

Therefore, if the surface of the display rotating body 11 to be observed from the outside is set to 1/4 unit of the peripheral surface, 90
The display can be switched alternately for each color painted for each °.

The n display rotors 11 _{1 to} 11 _n provided on the rotary shaft 13 are each provided with an exciting electromagnet mechanism 14.
_Since rotation is controlled independently by ₁ , 14 ₂ , 14 ₃ , ... 14 _n , it is possible to display various shades by the respective display rotators 11 _{1 to} 11 _n .

When a certain display rotor is controlled to rotate by an exciting electromagnet mechanism, the magnet 11 of the display rotor is also controlled.
The magnetic force lines act on a, but the magnetic force lines prevent the magnetic force lines from leaking to the display rotor side adjacent to the peripheral surface side of the display rotor. Therefore, when one display rotary body rotates, the adjacent display rotary body also does not rotate together. Therefore, the adjacent display rotator does not rotate erroneously, and reliable display is possible.

Further, since the rotary shaft 13 is made of a synthetic resin material having excellent sliding characteristics, each of the display rotary bodies 11 ₁ to ₁ 1
1 _n smoothly slides around the rotary shaft 13 to rotate. Further, since each of the display rotating bodies 11 _{1 to} 11 _n is composed of the plastic magnet 11a, it is extremely lightweight and does not become heavy as a whole.

Further, since the partition members 12, 12, ... Are interposed between the respective display rotators 11 _{1 to} 11 _n , there is no possibility that the rotations of the adjacent display rotators affect each other.

Further, the magnetic members 17 for preventing magnetic interference are provided on the display rotors 11 _{1 to} 11 _n and the exciting electromagnet mechanisms 14 ₁ , 1.
Since a panel-shaped display device can be configured by arranging a plurality of display units to which 4 ₂ , 14 ₃ , ... 14 _n are attached side by side, the display device can be easily assembled.

Next, another embodiment of the present invention will be described with reference to the drawings. The same parts as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The display unit 21 ₁ shown in FIG.
Magnetic iron plate 18 for backward arranged at the bottom of the through 21 _n, the exciting electromagnet mechanism in each of the display units 21 ₁ through 21 _n in the magnetic iron plate _{18 14 1, 14 2, 14} 3, ... 14 n
The exciting yokes 15a and 16a are connected.

The reflector 23 is omitted in this embodiment.

By doing so, the exciting yokes 15a, 15a, 1
It is possible to prevent the magnetic path between the magnetic member 6a and the magnetic member 17 for preventing magnetic interference from being opened downward and improve the utilization efficiency of magnetism.

It is needless to say that the same effects as those of the above-mentioned embodiment can be obtained in this embodiment as well.

In FIG. 7, the display direction of the display surface of the display rotor 11 is horizontal, that is, the adjacent magnetic interference preventing magnetic members 17 ₁ and 17 ₂ are located above and below the display rotor 11. When installed as described above, a force acting between the magnetic member 17 ₁ for preventing magnetic interference on the upper side and the display rotating body 11 is F ₁ , and the magnetic member 17 for preventing magnetic interference on the lower side is
The force exerted between the 2 and the display rotating body 11 and F _2, the mass of said display rotating body 11 m, the gravitational acceleration and _{g, 0 <F 1 -F 2} < range of 2 mg, for example F ₁ -F ₂
So as to be approximately mg, the magnetic member 1 for preventing magnetic interference on the upper side.
7 ₁ is arranged closer to the display rotating body 11 than the magnetic interference preventing magnetic member 17 ₂ on the lower side.

In such a structure, the electromagnet 15,
When the excitation of 16 is stopped and the non-excitation state is reached, the potential energy is as shown in FIG. 8 (a), and the torque is as shown in FIG. 8 (b). And F ₁ = F
_In the case of ₂ , the friction generated on the display rotating body 11 in the non-excitation state is large, so that the position where the display rotating body 11 stops varies, and as shown in the range B in FIG. 8 (b). The angular width of the display position becomes large. On the other hand, in this embodiment, since F ₁ -F ₂ is approximately mg, the friction generated on the display rotating body 11 in the non-excited state becomes extremely small,
Therefore, the position where the display rotating body 11 stops becomes accurate,
As shown in the range A in FIG. 8B, the angular width of the display position becomes smaller. The dotted line in FIG. 8B is F ₁ =
The torque due to the maximum static friction force when F ₂ is shown,
The dashed line in (b) of FIG. 8 indicates the torque due to the maximum static friction force when F ₁ -F ₂ is approximately mg.

Therefore, in this embodiment, accurate display can be performed when the display direction of the display surface of the display rotating body 11 is horizontal.

It is needless to say that the same effects as those of the above-mentioned embodiment can be obtained in this embodiment as well. Further, in the above-mentioned embodiment, F ₁ -F ₂ was set to about mg, but this is 0 <F ₁ -F ₂
Within the range of <2 mg, the effect of reducing the friction generated on the display rotating body 11 can be obtained.

In each of the above-mentioned embodiments, the support body is composed of the rotary shaft and the display rotary body is rotatably supported with respect to the peripheral surface of the rotary shaft. However, the present invention is not necessarily limited to this. Alternatively, a cylindrical one that covers the peripheral surface of the display rotator may be used, and a part thereof may be cut out to form the display surface of the display rotator. In this case, the inner peripheral surface of the support member and the outer peripheral surface of the display rotating member come into sliding contact with each other to rotate.

FIG. 9 shows a plurality of display rotating bodies 3.
, 31 are arranged in the axial direction at predetermined intervals, and an exciting unit 32, which is an excitation driving means, is arranged on the side opposite to the display direction of each display rotary body 31, and each display rotary body 3 is arranged.
The peripheral surface portion of each display rotor 31 orthogonal to the display direction of 1 is sandwiched by the first magnetic shield plates 33, 33 from both sides, and each display rotor 31 is connected to each display rotor 3 thereof.
The end face portion of 1 is sandwiched by the second magnetic shield plates 34, 34, ... From both sides, and each display rotor 31 is rotatably supported.

As shown in FIG. 10, the first magnetic shield plate 33 has a plurality of tooth portions 33a, which are spaced apart from each other by a predetermined distance.
33a, ... are formed in a comb-like shape and each tooth portion 33
a is arranged so as to face the peripheral surface portion of each display rotating body 31.

As shown in FIG. 11, the second magnetic shield plate 34 is a U-shaped member in which shield portions 34a and 34b sandwiching the end face portion of one display rotary body 31 are connected at the bottom. The portions 34a, 34b are provided with holes 34c, 34d for rotatably supporting the protrusions of the display rotating body 31. The central portion of the lower connecting portion of the second magnetic shield plate 34 is hollowed out.

As shown in FIG. 12, each of the display rotary members 31 has a cylindrical permanent magnet 31a magnetized perpendicularly to the cylindrical axis and magnetized to have two poles in the circumferential direction.
b and 31b glued on both ends, each cap 31b
Each hole 34 of the second magnetic shield plate 34 is provided at the outer center of the
A protrusion 31c rotatably supported by c and 34d is formed. It should be noted that the display color is directly applied to the peripheral surface of each display rotating body 31 by changing the color every 90 °, for example.

As shown in FIG. 13, the exciting unit 32 has a plurality of electromagnets 32b, 32 at the center of a base 32a.
b, ... Are arranged at a predetermined interval and the electromagnet 3
Recesses 32c, 32 into which the lower connecting portion of the second magnetic shield plate 34 fits on the side portion of the base 32a on which the 2b is arranged.
c, ... Are formed.

In the embodiment having such a structure, as shown in FIG. 14, the protrusions 31c, 31c of the display rotary member 31 are fitted into the holes 34c, 34d formed in the second magnetic shield plate 34, respectively. The display rotating body 31 is rotatably supported by the second magnetic shield plate 34.

A large number of second magnetic shield plates 34, on which the display rotating body 31 is supported, are provided in the recess 32 of the magnetic unit 32.
c, 32c, ... Finally, the two first magnetic shield plates 33 are positioned so that the tooth portions 33a of the first magnetic shield plate 33 close the shield portions 34a and 34b of the second magnetic shield plate 34, respectively. It is adhered to the side edge of the magnetic shield plate 34. In this way, the display unit shown in FIG. 9 is formed.

In this display unit, when the electromagnet 32b of the exciting unit 32 is in the non-energized state, the magnetic pole of the display rotating body 31 is the first magnetic shield plate 33 as shown in FIG.
It becomes stable at the position facing ₁ , 33 ₂ . At this time, the magnetic flux emitted from the N pole of the display rotor 31 enters the _first magnetic shield plate 33 ₁ on the upper side in the drawing, is divided into the left and right sides, and passes through the second magnetic shield plates 34 ₁ and 34 ₂ on both sides, The first magnetic shield plate 33 ₂ on the lower side in the figure merges and enters the S pole of the display rotating body 31.
At this time, the magnetic flux emitted from the N pole of the display rotor 31 is the first
33a and teeth 33a of the magnetic shielding plates 33 ₁ and 33 ₂ of
Are separated from each other by a predetermined distance, the adjacent display rotating bodies 3
It hardly flows into 1. Therefore, there is almost no interaction with the adjacent display rotating body. In this way, magnetic interference between adjacent display bodies can be prevented more reliably. Therefore, also in this embodiment, the adjacent display bodies do not erroneously rotate due to the rotation of the display bodies, and reliable display can be performed.

[0061]

As described above in detail, according to the present invention, it is possible to prevent magnetic interference between the adjacent display bodies, and therefore the adjacent display bodies do not erroneously rotate due to the rotation of the display bodies, and a reliable display is achieved. It is possible to provide a rotatable display device.

[Brief description of drawings]

FIG. 1 is a perspective view of a display unit showing an embodiment of the present invention.

FIG. 2 is a partial perspective view showing a configuration of a display rotating body and an exciting electromagnet mechanism of the embodiment.

FIG. 3 is a perspective view showing a configuration of a display rotating body according to the embodiment.

FIG. 4 is a diagram for explaining a rotating operation of a display rotating body in the embodiment.

FIG. 5 is a diagram showing a configuration of a panel-shaped display device in the example.

FIG. 6 is a diagram showing a configuration of a panel-shaped display device showing another embodiment of the present invention.

FIG. 7 is a sectional view showing another embodiment of the present invention.

FIG. 8 is a waveform diagram showing potential energy and torque in a non-excited state in the same example.

FIG. 9 is a partial perspective view showing another embodiment of the present invention.

FIG. 10 is a partial perspective view showing the configuration of the first magnetic shield plate of the embodiment.

FIG. 11 is a perspective view showing a configuration of a second magnetic shield plate of the same embodiment.

FIG. 12 is an exploded perspective view showing a configuration of a display rotating body according to the embodiment.

FIG. 13 is a partial perspective view showing the configuration of the excitation unit of the same embodiment.

FIG. 14 is a perspective view for explaining the attachment of the display rotating body of the embodiment to the second magnetic shield plate.

FIG. 15 is a diagram for explaining the flow of magnetic flux in the same example.

FIG. 16 is a diagram showing a conventional example.

[Explanation of symbols]

11 ₁ to 11 _n ... display rotating body, 11a ... plastic magnet, 13 ... rotary shaft, 14 ₁ to 14 _n ... exciting electromagnet mechanism, 17 ... magnetic interference preventing magnetic member.

Claims (5)

[Claims] 1. A display rotor having a peripheral surface as a display surface and permanent magnets arranged along the peripheral surface, a support for rotatably supporting the display rotor, and a display rotor provided outside the display rotor. The excitation drive means for variably controlling the exciting magnetic property of the display rotor facing the permanent magnet and slidingly rotating the display rotor with respect to the support is orthogonal to the display direction of the display rotor. A rotary display device, characterized in that a magnetic member for preventing magnetic interference, which is arranged adjacent to the peripheral surface of the display rotating body, is provided on at least one of the peripheral surface sides. 2. A plurality of display rotators each having a peripheral surface as a display surface and permanent magnets arranged along the peripheral surface, a support rotatably supporting the plurality of display rotators on one axis, and A plurality of excitation drive means which are provided outside each display rotor and variably control the exciting magnetic poles of the respective display rotors facing the permanent magnets to slide and rotate the respective display rotors with respect to the support. And at least one of the peripheral surfaces of the display rotors, which is orthogonal to the display direction, is disposed adjacent to the peripheral surface of the display rotors, and fixes the support and a part of the excitation drive means. A rotary type display device characterized in that a magnetic member for preventing magnetic interference is provided as a unit. 3. A display rotor having a peripheral surface as a display surface and permanent magnets arranged along the peripheral surface, a support for rotatably supporting the display rotor, and a display rotor provided outside the display rotor. The excitation drive means for variably controlling the exciting magnetic property of the display rotor facing the permanent magnet and slidingly rotating the display rotor with respect to the support is orthogonal to the display direction of the display rotor. A magnetic member for preventing magnetic interference, which is disposed adjacent to the peripheral surface of the display rotating body on at least one of the peripheral surface sides, and the display rotating body is magnetically coupled with the magnetic member for preventing magnetic interference. A rotary display device, wherein a surface is set so that the display surface is positioned in the display direction with respect to a plurality of stable points obtained by the action. 4. A display rotor having a peripheral surface as a display surface and permanent magnets arranged along the peripheral surface, a support for rotatably supporting the display rotor, and a display rotor provided outside the display rotor. The excitation drive means for variably controlling the exciting magnetic property of the display rotor facing the permanent magnet and slidingly rotating the display rotor with respect to the support is orthogonal to the display direction of the display rotor. The magnetic interference preventing magnetic member is disposed on the peripheral surface side adjacent to the peripheral surface of the display rotating body, and the magnetic interference preventing magnetic member is positioned above and below the display rotating body. When the display direction of the rotating body is horizontal, the force acting between the upper magnetic interference preventing magnetic member and the display rotating body is F ₁ , and the lower magnetic interference preventing magnetic member and the display rotating body. The force acting between and F ₂ ,
When the mass of the display rotating body is m and the gravitational acceleration is g,
The rotary type wherein the upper magnetic interference preventing magnetic member is arranged closer to the display rotating body than the lower magnetic interference preventing magnetic member so that 0 <F ₁ −F ₂ <2 mg. Display device. 5. A display rotator having a peripheral surface as a display surface, permanent magnets arranged along the peripheral surface, and a plurality of display rotors arranged in the axial direction, and the display rotors provided outside the respective display rotors. Excitation drive means for variably controlling the exciting magnetic property of the rotating body facing the permanent magnet to rotate each of the display rotating bodies, and the peripheral surface portion of each display rotating body orthogonal to the display direction of each display rotating body are toothed. And a comb-shaped first magnetic shield member arranged so as to be sandwiched from both sides by a portion, and the display rotating bodies being rotatably supported and being arranged so as to sandwich the end face portion of each display rotating body from both sides. A rotary display device comprising a second magnetic shield member.