JPH0355980Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a magnetic display device that is provided with a plurality of electromagnets that apply a magnetic field to a magnetic panel, and a spring and a slide mechanism that bring these electromagnets into contact with the magnetic panel.

[Conventional technology]

2. Description of the Related Art Conventionally, as a magnetic display device that performs display by applying a magnetic field of an electromagnet to a magnetic panel, there is one described in Japanese Patent Laid-Open No. 59-214700, which was proposed by the present applicant. In this device, it is preferable to keep the electromagnet in contact with the magnetic panel in order to always obtain a clear display, so a spring is provided between the carrier stand and the electromagnet to press the electromagnet against the magnetic panel. A hole is provided in the flange formed on the outer periphery of the rear end, and a support rod extending from the base is inserted into the hole to guide the electromagnet and smooth the electromagnet sliding.

[Problem that the invention attempts to solve]

However, the above proposal is aimed at a magnetic display device in which a spring and a slide mechanism are attached directly to the electromagnet, and is applicable to a magnetic display device that uses multiple electromagnets to apply a magnetic field to a magnetic panel like this invention. However, this method required a spring and a slide mechanism for each electromagnet, and as the number of electromagnets increased, the structure became more complex and the recording head became larger, making it difficult to apply.

In view of the above, the present invention aims to provide a magnetic display device in which a plurality of electromagnets are brought into stable contact with a magnetic panel with a simple structure.

[Means for solving problems]

In order to achieve the above object, the magnetic display device of this invention commonly supports a plurality of electromagnets that apply a magnetic field to a magnetic panel to display a display, and this substrate is used as a carrier via a spring and a slide mechanism. The number of springs and slide mechanisms installed can be reduced by mounting on the base.In addition, two sets of thrust bearings are fixed to the base plate in parallel with the electromagnet, and a guide rod extending from the base is attached to these two sets of bearings. By inserting these, the rotation of the board to which the thrust bearing is fixed is prevented, and the wobbling of the board with respect to the guide rod is eliminated, thereby preventing vibration of the electromagnet.

〔Example〕

This invention will be explained below with reference to the drawings.

FIG. 2 shows a magnetic display device in which this invention is applied to a dot matrix type serial display.
In Figure 2, 1 has a multi-cell structure between two substrates consisting of a transparent top plate and a bottom plate, and inside these cells are magnetic particles (usually black) and a thickener (for example, finely divided silicic acid). is dispersed in a dispersion medium and a colorant (usually white) is added to the yield value.
This is a magnetic panel filled with a dispersion liquid of 5 dyne/cm ² or more. This magnetic panel 1 applies a magnetic field to the dispersion liquid from the bottom plate side to attract magnetic particles, and then applies a magnetic field from the top plate side. When the magnetic particles are attracted to the bottom plate side, the magnetic particles in the dispersed liquid move to the top plate. Since the liquid migrates to the side, a contrast is generated in the dispersion liquid to form a display, and by repeating the above operation, the display and the display can be erased as many times as desired.

A mechanism is provided on the front side of the magnetic panel 1 to move the stand 2, which is separated into two parts, in a predetermined direction. That is, the slide blocks 5 and 6 are attached to the X orbits 3 and 4 provided on both sides of the magnetic panel 1, and the X direction wires are attached to the guide rollers 7, 8, 9, 10, 11, and 12 of the slide blocks 5 and 6, respectively. 13 and 14 are wound as shown in FIG. 2, and the driving force of the X-direction drive motor 15 is applied to the X-direction wires 13 and 14 via the pulleys 16 and 17, the slide blocks 5 and 6 move in the direction of the arrow in FIG. It is designed to move parallel to the direction. On the other hand, the stand 2 is attached via guide rollers 2a, 2b to the Y tracks 18, 19 connected to the slide blocks 5, 6, and the guide rollers 20, 21, 22 of this stand 2,
Y on 23, 24, 25, 26, 27, 28, 29
The direction wire 30 is wound as shown in FIG.
When given to the direction wire 30, the platform 2 follows the Y trajectory 1
8 and 19 in parallel.

An erasing magnet 33 is placed behind the magnetic panel 1 and extends across the back surface, and a wire 40 is wound around the guide rollers 34, 35, 36, 37, 38, 39 of this erasing magnet 33 as shown in FIG. When the driving force of the erasing magnet drive motor 41 is applied to the wire 40 via the pulley 42, the display on the magnetic panel 1 can be erased.

Figure 3 shows an electromagnet array that displays 24 dot matrix characters vertically and 24 horizontally, for a total of 24 dot matrix characters.
Electromagnets 43 are arranged so as to be distributed at the intersections of a horizontal line L1 inclined with respect to the running direction and a vertical line L2 perpendicular to the running direction, and these electromagnets 43 are arranged parallel to the running direction. Lines with equal pitch
One by one is placed on L3. In the figure, 43a indicates the tip of the electromagnet, 44 indicates the substrate, and the substrate 4
4 to commonly support a plurality of electromagnets 43. On the lower surface of the substrate 44, through holes 45, 4 are provided in parallel to the electromagnets 43 at both corners on one diagonal line.
5 is formed, and recesses 46, 46 shown by dotted lines are formed at both diagonal corners. And stand 2
When the robot travels in a predetermined direction, when the electromagnet 43 is selectively operated, characters consisting of a combination of dots are displayed on the magnetic panel 1.

Next, the electromagnet pressing mechanism, which is a feature of this invention, will be explained.

1 and 4 show an example of a structure in which the substrate 44 in FIG. 3 is connected to the stand 2 and integrated. As shown in detail in FIG. 1, a thrust bearing 49 is inserted into each of the two through holes 45 (one of which is shown in FIG. 1). Thrust bearing 4
9 is fixed by forming the through holes 45, 45 with the large diameter part 47 and the small diameter part 48, and by abutting the front surface of the thrust bearing 49 against the mounting surface 50 formed by the large diameter part 47 and the small diameter part 48. A retaining ring 52 that fits the rear surface of the bearing 49 into the annular groove 51 of the large diameter portion 47
Lock it in place. On the other hand, the stand 2 facing the substrate 44
Two through holes 53, 53 and two recesses 54, 54 are provided at locations corresponding to the through holes 45, 45 and recesses 46, 46, respectively, and the guide has a retainer 55 at one end. The rod 56 is inserted into the thrust bearing 49, and the other end of the guide rod 56 is inserted into the through hole 53 of the base 2 and attached. and the board 44
A coil spring 57 is provided between the recess 46 of the base 2 and the recess 54 of the base 2. Here, 58 represents a nut screwed to the other end of the guide rod 56, and 59 represents a C-shaped ring fitted into an annular groove 60 formed in the guide rod 56. A rod 56 is fixed to the stand 2.

In such a configuration, the electromagnet 43 is urged by the coil spring 57 via the substrate 44 and comes into contact with the magnetic panel 1, and the substrate 44 moves together with the base 2 via the guide rod 56 and is mounted on the guide rod 56. The use of two pairs of thrust bearings 49 prevents each other from rotating and allows the electromagnet 33 supported by the substrate 44 to smoothly slide against the magnetic panel 1. Furthermore, when the thrust bearing 49 is fixed to the base 2 and the guide rod 56 is fixed to the base plate 44, the length of the thrust bearing 49 is added to the length of the electromagnet 43, etc., and the distance between the base 2 and the magnetic panel 1 is increased. Although the dimensions of the through hole 45 are large, as described above, the through hole 45
If the thrust bearing 49 is fixed in parallel to the electromagnet 43, there is no need to add the length of the thrust bearing 49 to the length of the electromagnet 43, etc., so the dimension between the stand 2 and the magnetic panel 1 can be kept small. be able to. Further, since the rolling elements 49a incorporated in the thrust bearing 49 are in contact with the guide rod 56, the substrate 44 can be tightly coupled to the guide rod 56 via the thrust bearing 49, and therefore the dots can be tightly connected to the guide rod 56 via the thrust bearing 49. When displaying characters consisting of a combination, the guide rod 56
Electromagnet 3
3, it is possible to display high quality images.

In addition, the coil spring 57 and the slide mechanism 4
The number of 9 and 56 installed depends on the number of electromagnets 33 and the size of the board 44, but normally it is sufficient to use 2 sets each, and if necessary, 3 or more slide mechanisms and 2 or more coil springs. can be used in combination as appropriate.

In this way, there is a magnetic panel, multiple electromagnets that apply a magnetic field to the magnetic panel to display images, a substrate that commonly supports these electromagnets, a thrust bearing fixed to this substrate in parallel with the electromagnets, and this thrust bearing. In the case of the present invention, the present invention includes a guide rod inserted into the magnetic panel, a stand that moves on the surface of the magnetic panel and has one end of the guide rod attached, and a spring that is provided between the stand and the board and presses the electromagnet against the magnetic panel. , guide rod 5
6 and the magnetic panel 1 (corresponding to the amount of deflection of the plate surface of the magnetic panel 1), and the distance D between the board 44 and the stand 2.
When d<D, if the guide rod 56 guides the thrust bearing 49 by an amount corresponding to the amount d, it is expected that the guide rod 56 will collide with the magnetic panel 1 and damage the plate surface of the magnetic panel 1. be done. If this point is disliked, a stopper 61 located between the board 44 and the base 2 may be provided on the guide rod 56 so as to come into contact with the lower surface of the board 44, and the thrust bearing 49 may be moved by an amount corresponding to the amount d. It would be better to provide slightly less guidance. In the figure, 62 indicates an annular groove into which a ring serving as a stopper is fitted.

[Effect of idea]

As described above, this idea allows multiple electromagnets to be supported in common by a board, and this board is attached to a stand via a spring and slide mechanism, thereby reducing the number of springs and slide mechanisms installed.
In addition, two sets of thrust bearings are fixed to the board parallel to the electromagnets, and guide rods extending from the stand are inserted into these two sets of bearings, thereby preventing the board on which the thrust bearings are fixed from rotating and guiding the board. It becomes easy to prevent shaking of the electromagnet by eliminating wobbling of the substrate with respect to the rod, and therefore, it has the effect of making it possible to display a high-quality display.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of a main part showing details of the guide mechanism used in this device, FIG. 2 is a diagram showing an embodiment of this device, FIG. 3 is an explanatory diagram of the electromagnet arrangement of the recording head used in this device, FIG. 4 is a sectional view showing the guide mechanism used in this device. 1 is a magnetic panel, 2 is a stand, 43 is an electromagnet, 43
a is the tip of the electromagnet, 44 is the substrate, 45 is the through hole, 4
6 is a recess, 47 is a large diameter part, 48 is a small diameter part, 49 is a thrust bearing, 49a is a rolling element, 50 is a mounting surface, 51 is an annular groove, 52 is a retaining ring, 53 is a through hole, 54 is a recess , 55 is a retainer, 56 is a guide rod, 57 is a coil spring, 58 is a nut, 5
9 is a C-shaped ring, 60 is an annular groove, 61 is a stopper, and 62 is an annular groove.

Claims (1)

[Scope of utility model registration request] A magnetic panel, multiple electromagnets that apply a magnetic field to the magnetic panel to display images, a substrate that commonly supports these electromagnets, two sets of thrust bearings fixed to this substrate in parallel with the electromagnets, and these two sets. a guide rod inserted into each of the thrust bearings, a stand that moves on the surface of the magnetic panel and to which one end of the guide rod is attached, and a spring that is provided between the stand and the board and presses the electromagnet against the magnetic panel. A magnetic display device.