JPH0617175Y2 - Magnetic reversal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A magnetic reversal type display device which reverses a display surface by a magnetic force, with the object of providing a magnetic reversal type display device capable of shortening the display conversion time and increasing the speed. A rotatably supported by a central axis and fixed inside a rotator having at least two display surfaces, and a display of the rotator by attraction and repulsion of an electromagnet fixed to the support. In a magnetic reversal type display which is a display for converting a surface, and which is provided with a braking mechanism for reducing fluctuation in the stop position of the rotating body, the braking mechanism is
The magnetic reversal type display is characterized in that it comprises an urging means for increasing the pressure on the sliding surface between the rotating body and the support.

[Industrial application field]

The present invention relates to a magnetic reversal type display device which reverses a display surface by a magnetic force.

[Conventional technology]

Conventionally, a magnetic reversal type display has been used as a device for performing various displays by reversing the display surface by magnetic force.

FIG. 7 is a front view of a conventional magnetic reversal type four-sided display device, and FIG. 8 is a plan view thereof. In these figures, the magnetic reversal type four-sided display is composed of a support body 1, a rotating body 2, an electromagnet 3, a permanent magnet 4, a central shaft 5, and the like. The support 1 is
An upper plate 1a and a lower plate 1b are provided, a supporting side bearing 1c through which the central shaft 5 is inserted is fixed to the center of the upper surface of the lower plate 1b, and an iron plate is provided on the lower plate 1b near the supporting side bearing 1c. Two electromagnets 3 having a core 3a are provided. Rotating body 2 is 4
A rotation side bearing 2c through which the central shaft 5 is inserted is fixed to the center of the rear surface of the fixed plate 2a provided inside, which has a display surface 2a and is symmetrical with the rotation side bearing 2c interposed therebetween. 2b
Two rod-shaped permanent magnets 4 are fixed to the back surface.
Then, the center shaft 5 is inserted into the supporting side bearing 1c and the rotating side bearing 2c, so that the rotating body 2 is rotatably supported by the supporting body 1 between the upper plate 1a and the lower plate 1b. A large number of such four-sided display devices are usually arranged in a matrix.

In this four-sided display, in order to change the display surface 2a, energization to the electromagnet 3 provided on the support 1 is controlled so that the permanent magnet 4 attached to the rotating body 2 is attracted and repelled. The rotating body 2 is rotated to a desired position.

[Problems to be solved by the device]

In the conventional magnetic reversal type four-sided display, when the electromagnet 3 is energized, a magnetic pole of the core 3a is generated and the display state is converted by repulsive attraction between the magnetic pole and the permanent magnet 4. Causes the permanent magnet 4 to move to the final stop position (conversion position).
At this point, the motor rotates too much without stopping, and its position (front of the electromagnet 3) is repeatedly vibrated (staggered).

Considering the usage pattern of the four-sided display device, a large number of display devices are often arranged in a matrix as shown in FIG. 9 rather than being used as a single display device. In this case, the mounting density is increased. Therefore, the interval (a) between adjacent displays is close to the value obtained by subtracting 1/2 (b) of the height of one display surface from the radius (c) of the rotation trajectory of one display (a ≧ It is usually set to cb). Therefore, since the rotation trajectories of the adjacent displays overlap, it is not possible to convert the display of all the displays at the same time.
The display conversion may be performed by shifting the timing between the odd-numbered rows and the even-numbered rows, or the odd-numbered rows and the even-numbered rows depending on the mounting direction of the display.

As described above, the conventional four-color display has a long time until the display surface is stopped, and in order to avoid the interference between the adjacent displays,
The display conversion time of the entire device also becomes long and the feature of high speed control cannot be utilized. That is, even if the control of half of the indicators (for example, all of the odd rows) of the entire device is finished,
Until the display is almost stopped, the remaining half of the displays (for example, all the even rows) cannot be converted.

Therefore, an object of the present invention is to provide a magnetic reversal type display device capable of shortening the display conversion time and increasing the speed.

[Means for Solving the Problems]

In order to achieve the above object, a magnetic reversal type display device of the present invention includes a permanent magnet that is rotatably supported by a support body around a center axis and is fixed inside a rotating body having at least two display surfaces. And a magnetic reversal type display in which the display surface of the rotating body is converted by attraction / repulsion of an electromagnet fixed to the support, and a braking mechanism for reducing fluctuation in the stopped position of the rotating body is provided. .

[Action]

According to the present invention, in the magnetic reversal type display, by providing the braking mechanism for reducing the wobbling at the stop position of the rotating body, the wobbling time is shortened, the time required for the display conversion is shortened, and the speed can be increased. Become.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

1 and 2 are front views of a magnetic reversal type four-sided display device according to first and second embodiments of the present invention.

In the magnetic reversal type four-sided display device of the first embodiment shown in FIG. 1, the supporting-side bearing 11c and the rotating-side bearing 12c have flat end portions as in the conventional example, and the rotating bearing and the supporting-side bearing 11c rotate. Side bearing 1
The upper plate of the support 11 should have a large pressure in the contact area with 2c.
A coil spring 31 is provided as a biasing means on the central shaft 15 between the fixed plate 12b of the rotating body 12 and the rotor 11a.

In addition, the magnetic reversal type four-sided display device of the second embodiment shown in FIG. 2 has the support 11 instead of the coil spring 31 of the first embodiment.
On the central axis 15 between the upper plate 11a and the fixed plate 12a of the rotating body 12, there is provided a permanent magnet 41 facing each other and having the same polarity.

In the magnetic reversal type display of the first and second embodiments having the above-described structure, the biasing means of the coil spring 31 and the permanent magnet 41 increases the pressure at the contact portion between the supporting side bearing 11c and the rotating side bearing 12c, and the frictional force. The braking effect is generated in and the vibration can be reduced. Therefore, high speed conversion becomes possible.

In the first and second embodiments, the coil spring 31
And the permanent magnet 41 is used, but at least the bearing on the support side
Any urging means that increases the pressure at the contact portion between the 11c and the rotating-side bearing 12c may be used, and the position where the urging means is provided is not limited to the embodiment.

FIGS. 3 and 4 show a magnetic reversal type four-sided display device according to a third embodiment of the present invention. FIG. 3 is a front view and FIG. 4 is a plan view.

In the magnetic reversal type four-sided display device according to the third embodiment, rod-shaped magnetic members 51 are provided on the upper plate 11a of the upper portion of the permanent magnet 14 facing the electromagnets 13 at two positions.

In the magnetic reversal type display device of the third embodiment having the above configuration, the permanent magnet 14 and the magnetic material 51 are attracted by the magnetic force, so that the effect of preventing the vibration of the rotating body 12 is enhanced, and high speed conversion is possible. Further, in the above-mentioned first and second embodiments, the pressure of the contact portion becomes large and the rotation slows down, so that the vibration prevention effect is great, but considering the wear of the sliding portion, it is not preferable in terms of life etc. Thus, in this embodiment, the pressure at the contact portion is not increased. It should be noted that disposing the magnetic material 51 on the opposite side that does not face the electromagnet 13 is not preferable because a twisting force is generated in the central shaft 15.

5 and 6 show a magnetic reversal type four-sided display device according to a fourth embodiment of the present invention. FIG. 5 is a front view and FIG. 6 is a plan view.

In the magnetic reversal type four-sided display of the fourth embodiment, four electromagnets 13 are provided, and rod-shaped magnetic material 61 is provided on the upper plate 11a of the permanent magnet 14 facing the electromagnet 13. There is.

In the magnetic reversal type display device of the fourth embodiment having the above structure, the permanent magnet 14 and the magnetic material 61 are attracted by the magnetic force, so that the permanent magnet 14 and the magnetic material 61 act in the same manner as in the third embodiment, and the effect of preventing the vibration of the rotating body 12 is obtained. It becomes even larger, and high-speed conversion becomes possible.

In each of the above embodiments, the magnetic reversal type four-sided display device is described as an example, but the present invention is not limited to this and can be applied to, for example, a two-sided display device.

Further, in each of the embodiments, the same applies to the case where four electromagnets 13 are provided.

[Effect of device]

As described above, according to the present invention, in the magnetic reversal type display, by providing the braking mechanism for reducing the wobbling at the stop position of the rotating body, the wobbling time is shortened and the time required for the display conversion is shortened. It becomes possible to speed up.

[Brief description of drawings]

 1 is a front view of a first embodiment of the present invention, FIG. 2 is a front view of a second embodiment of the present invention, FIG. 3 is a front view of a third embodiment of the present invention, and FIG. 4 is a third view of the present invention. FIG. 5 is a plan view of a fourth embodiment of the present invention, FIG. 6 is a plan view of a fourth embodiment of the present invention, FIG. 7 is a front view of a conventional example, and FIG. 8 is a conventional example. FIG. 9 is a plan view showing the arrangement of the conventional example. In the figure, 11 is a support, 11a is an upper plate, 11b is a lower plate, 11c is a support side bearing, 12 is a rotating body, 12a is a display surface, 12b is a fixed plate, 12c is a rotating side bearing, 13 is an electromagnet, 13a Is a core, 14 is a permanent magnet, 15 is a central axis, 41 is a permanent magnet, and 51 and 61 are magnetic materials.

Claims (5)

[Scope of utility model registration request] 1. A rotating body (1) rotatably supported by a support body (11) by a central shaft (15) and provided with at least two display surfaces (12a).
The permanent magnet (14) fixed to the inside of (2) and the electromagnet (13) fixed to the support (11) are attracted and repelled by the rotating body (1).
It is a display device for converting the display surface (12a) of 2),
In a magnetic reversal type display provided with a braking mechanism for reducing fluctuation in the stop position of (12), in the braking mechanism, the pressure on the sliding surface between the rotating body (12) and the support (11) is A magnetic reversal type display characterized by comprising an energizing means that becomes larger. 2. The urging means comprises a rotating body (12) and a support body (11).
The magnetic reversal type display device according to claim 1, characterized in that it is a coil spring (31) provided between the magnetic reversal type display device and the coil spring. 3. A rotator (12) and a support (11) for the urging means.
And repulsive permanent magnets (4
2. The magnetic reversal type display according to claim 1, which is 1). 4. The braking mechanism is provided on a support (11),
2. The magnetic reversal type display device according to claim 1, further comprising a magnetic stopper for exerting a magnetic attraction force between the rotor (12) and the permanent magnet (14). 5. The magnetic stopper is a magnetic material (51, 61) fixed to a support (11) portion above a permanent magnet (14) facing the electromagnet (13). Item 5. The magnetic reversal type display device according to item 4.