JPH0746953Y2 - 4-sided display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A display body having four display surfaces and rotatably supported by a main body on a central axis, and two display bodies fixed in parallel inside the display body with the central axis interposed therebetween. Permanent magnets, four iron cores fixed to the main body side at positions symmetrical to each end of the permanent magnet with the central axis interposed therebetween, and adjacent two of the iron cores
By providing an electromagnet formed by winding a coil only on a book, a four-sided display device that does not cause an erroneous display is provided.

[Industrial application field]

 The present invention relates to a four-sided display device which is free from false display.

[Conventional technology]

FIG. 5 is an exploded view of a conventional example, FIG. 6 is an exploded view of another conventional example, and FIGS. 7 (a) and 7 (b) are plan views of the conventional example.
31 is a display surface, 32 is a central axis, 33 is a main body, 34 is a display, 35 is a permanent magnet, 37 is an iron core, 38 is a coil, and 39 is an electromagnet.

The conventional four-sided display is, for example, as shown in FIG.
One rod-shaped permanent magnet 35 is fixed in a display body 34 having a display surface 31 so as to be symmetrical with the central axis 32 interposed therebetween. The display body 34 is rotatably supported by the central shaft 32 on the main body 33 side.

To change the display surface 31 by rotating the display body 34, the power supply to the four electromagnets 39 provided on the main body 33 side is controlled to display the display body 31.
The permanent magnet 35 of 34 is attracted and repelled to rotate the display 34 to a desired position.

However, recently, for the reason that the same display operation can be performed, as shown in FIG. 6, a structure is adopted in which only two adjacent coils 38 of the four electromagnets are left and the others are left only of the iron core 37. It has become. This iron core attracts the pole on the opposite side of the permanent magnet 35 attracted by the electromagnet 39, and therefore has an advantage that a holding force can be obtained.

[Problems to be solved by the device]

However, in the conventional four-sided display as described above, as shown in FIG. 7 (a), since the number of the permanent magnets 35 fixed to the display body 34 is one, the magnetic poles of the four electromagnets 39 are arranged. And two poles of the permanent magnet 35 are attracted and repelled, and two stable positions are generated as shown by a solid line and a broken line.

In the case of another conventional example shown in FIG. 7 (b), two stable states similarly occur.

In such a state, rotate the display body 34 quickly to
When the conversion of 31 is performed, the permanent magnet 35 of the display body 34 does not stop at the desired solid line position, but overruns as shown by the arrow and stops at another stable position shown by the broken line. Therefore, the conventional four-sided display has a problem that an erroneous display is likely to occur.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a suitable four-sided display device that does not cause erroneous display.

[Means for Solving the Problems]

The above-mentioned problem is that the display body is rotatably supported on the main body by a central axis fixed to the center inside the display body, and four iron cores extend parallel to the central axis and sandwich the central axis. In a four-sided display, which is fixed to the main body at four points that form a pair symmetrically and in which two adjacent four iron cores are provided with electromagnets, A four-sided display device in which two rod-shaped permanent magnets are symmetrically fixed in parallel to each other on the upper surface portion with a central axis interposed between them, and each end of the permanent magnet faces four iron cores. Will be solved by providing.

[Action]

In the present invention, a display body having four display surfaces and rotatably supported by a main body on a central axis, two permanent magnets fixed in parallel inside the display body with the central axis interposed therebetween, and the permanent magnet. 4 iron cores fixed to the main body side at positions opposed to both ends of the iron core and symmetrically sandwiching the central axis, and a coil is wound around only two adjacent iron cores of the iron cores. Since the electromagnet is provided, the display position is selected by a combination of the two permanent magnets fixed to the display body, the two electromagnets on the main body side, and the two iron cores. Since it is possible to set one for each display position, it is possible to eliminate erroneous display.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded view of this embodiment, FIGS. 2 (a), (b),
(C) and (d) are plan views showing each display state of the present embodiment,
3 (a), (b), (c), and (d) are plan views showing the respective display states of this embodiment, and FIG. 4 is a perspective view showing the magnetization direction of the permanent magnets. (A) shows a state diagram magnetized in the length direction, and (b) shows a state diagram magnetized in the thickness direction.

In the figure, 11 is a display surface, 12 is a central axis, 13 is a main body, 14 is a display, 15 is a permanent magnet, 16 is both ends, 17 is an iron core, 18 is a coil, and 19 is an electromagnet.

As shown in FIG. 1, the four-sided display device of this embodiment has four side surfaces of a prism-shaped display body 14 as the display surface 11,
It is rotatably supported on a main body 13 by a central shaft 12 fixed in the center of the inside. Two rod-shaped permanent magnets 15 are arranged in parallel on the upper surface of the display body 14 with the central axis 12 interposed therebetween.
Are fixed so that they are symmetrical. As shown in FIGS. 4 (a) and 4 (b), this rod-shaped permanent magnet 15 should be implemented by using a permanent magnet that is either magnetized in the length direction or magnetized in the thickness direction. You can Four iron cores 17 are provided on the main body 13 side at four points which are opposed to both ends 16 of the permanent magnet 15 and are symmetrically paired with the central axis 12 interposed therebetween.
It is fixed so as to extend in parallel to 12, and two electromagnets 19 are formed by winding a coil only on two adjacent iron cores 17 of the iron core 17. The two electromagnets 19 can be excited to a desired magnetic pole by controlling the flow of a current to be applied. The material of the iron core 17 used for the electromagnet 19 is not limited to iron, and various magnetic materials can be used. In this embodiment, a semi-hard magnetic material is preferably used for the portion of the iron core 17 that becomes the iron core of the electromagnet, and the other two iron cores are pure iron materials. This is because if only a semi-hard magnetic material is used, permanent magnetization may remain in the iron core portion where the coil is not wound, and the coercive force with the permanent magnet in the display body may be reduced.

Using the four-panel display of the present embodiment having such a configuration,
The display surface was converted as follows.

Each of FIGS. 2A and 2B is implemented by using two permanent magnets 15 magnetized in the length direction. In the figure, in order to make it easier to understand the rotation status of the display, the reference display surface is
Indicated as.

In FIG. 2 (a), when the lower electromagnet 19 is excited to S / S, attraction / repulsion action is exerted between it and the permanent magnet 15, and the stable upper surface in this state is referred to as surface A. The opposite S / S pole that is not attracted to the electromagnet 19 attracts the iron core 17 and acts as a holding force. There is only one stable position of the permanent magnet 15.

In FIG. 2 (b), when the lower electromagnet 19 is excited to N / S, attraction / repulsion acts between the electromagnet 19 and the permanent magnet 15 to rotate 90 ° counterclockwise and the surface A comes to the left. Both poles S / N of the upper permanent magnet 15 attract each other with the iron core.

In FIG. 2 (c), when the lower electromagnet 19 is excited to N / N, the attraction / repulsion action works with the permanent magnet 15 to further rotate 90 ° counterclockwise and the A surface comes down. Not attracted to electromagnet 19
The N / N pole attracts the iron core 17.

In FIG. 2 (d), when the lower electromagnet 19 is excited to S / N, attraction / repulsion action is exerted between it and the permanent magnet 15 to further rotate 90 ° counterclockwise and the A surface comes to the right. Both poles of upper permanent magnet 15 N / S
Sucks on the iron core.

In this way, when the display is performed by the four-sided display of the present embodiment, there is only one stable state formed by the permanent magnet 15, the electromagnet 19 and the iron core 17 at each position, so that no erroneous display occurs. .

In addition, in each of FIG. 3, two permanent magnets 15 magnetized in the thickness direction are shown.
It was carried out using a book. As in FIG. 2, the reference display surface is indicated as A.

In FIG. 3 (a), when the lower electromagnet 19 is excited to S / S, the permanent magnet 15 excited in the thickness direction is attracted and repulsed to stabilize the surface A in the upper state, and the iron core 17 Permanent magnet 15 on top
Suck up with the poles of. The display 14 is not stabilized at other positions.

In FIG. 3 (b), when the lower electromagnet 19 is excited to N / S, the display body 14 rotates 90 ° counterclockwise and the surface A comes to the left.

In FIG. 3 (c), when the lower electromagnet 19 is excited to N / N, the display body 14 further rotates 90 ° counterclockwise and the surface A comes down.

In FIG. 3 (d), when the lower electromagnet 19 is excited to S / N, the display body 14 further rotates 90 ° counterclockwise and the surface A comes to the right.

In the case of FIG. 3 as well, as in the case of FIG. 2, it was possible to provide a suitable four-sided display in which no erroneous display occurs.

Further, by using a semi-hard magnetic material for the iron core 17 shown in FIG. 1, the iron core is temporarily magnetized when a current is only applied to the coil of the electromagnet 19 for the first time. Can be maintained. Therefore, the display could be operated with low power consumption.

[Effect of device]

As described above, the four-sided display of the present invention enables stable display without erroneous display by limiting the stable position of the display body to one.

[Brief description of drawings]

FIG. 1 is an exploded view of an embodiment of the present invention, FIGS. 2 (a), (b), (c) and (d) are plan views showing respective display states of the embodiment of the present invention, and FIG. 3 (a). , (B), (c) and (d) are plan views showing respective display states of the embodiment of the present invention, and FIG. 4 is a perspective view showing a magnetizing direction of the permanent magnet, in which (a) is a long view. A state diagram magnetized in the depth direction, (b) a state diagram magnetized in the thickness direction, FIG. 5 is an exploded view of a conventional example, FIG. 6 is an exploded view of another conventional example, and FIG. 7 (a). , (B) are plan views of a conventional example. In the figure, 11 is a display surface, 12 is a central axis, 13 is a main body, 14 is a display body, 15 is a permanent magnet, 16 is both ends, 17 is an iron core, 18 is a coil, and 19 is an electromagnet.

Claims (1)

[Scope of utility model registration request] 1. A display body (14) is rotatably supported on a main body (13) by a central shaft (12) fixed to the center inside the display body (14), and four iron cores (17) are provided. Are parallel to the central axis (12) and are fixed to the main body (13) at four points which are symmetrically paired across the central axis (12). In a four-sided display in which two adjacent electromagnets (19) are arranged in the display body (14), the central axis (12) is sandwiched between the upper surfaces of the display body (14). Two rod-shaped permanent magnets (15) are fixed symmetrically in parallel, each end (16) of the permanent magnet (15) and four iron cores (1
A four-sided display characterized in that 7) faces each other.