JPH0546071Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] The collision part of the erasing head part is a rotatable roller,
By comprising a guide plate that rotates the display element while being in continuous contact with the roller, and a support mechanism in which the roller and the guide plate are elastically supported by coil springs, the display element can be stably and reliably reversed. This makes it possible to extend the life of the support mechanism.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a fluid display device, and more particularly to a display device provided with an impingement portion of an erasing head for stabilizing and reversing the display element.

[Conventional technology]

5 through 7 are bottom views of conventional erase heads. In the figure, 41a and 41b are display surfaces, 42 is a magnetic piece, 43 is a display element, 44 is an endless conveyance track, 47 is an external magnet, 48 is a collision part, and 49
51 is a roller, 52 is a rotating shaft, 53 is a rotation inhibiting plate, and 55 is a base.

The erasing head portion of a conventional fluid display device was as shown in FIGS. 5 through 7. When the endless conveyance track 44 moves in the direction of arrow E as shown in FIG. 5, the magnetic piece 4 is
2 is attracted, and the display element 43 uniformly attracts the magnetic piece 42.
stands on top. Since the display elements 43 collide in the direction of the arrow F by colliding with the collision portion 48 formed by the leaf spring 51, the display elements 43 are unified into the same display surface (display surface 41a). In other words, the display is erased. Figure 6,
The erasing principle is the same in the case of FIG. 7, but instead of the plate spring 51 of the collision part 48, a roller 49 or a combination of the roller 49 and the plate spring 51 is used.

[Problem that the invention attempts to solve]

As described above, the conventional fluid display device uses an erasing head section as shown in FIGS. 5 to 7.

The collision part 48 of the erasing head shown in FIG. 5 uses a leaf spring 51, so its lifespan is short and the lifespan varies, and the leaf spring 51 only bends in the direction of the arrow G in the figure. , wear and collision noise occur when the display elements 43 moving in the direction of arrow E collide.

Since the collision part 48 of the erasing head shown in FIG. 6 uses a fixed roller 49, the natural rotation of the roller in the direction of arrow H at the time of collision causes the display element 43 to
wear and collision noise can be reduced to some extent. However, since the roller 49 is fixed and does not have an elastic structure, the above-mentioned effect is insufficient, and since the roller collides at one point, it is difficult to adjust the position of the roller, resulting in high cost.

The collision part 48 of the erasing head shown in FIG.
is fixed. The roller 49 is the display element 4
3, the display element 43 is deflected to the position shown by the broken line, and the natural rotation of the roller 49 can reduce the abrasion of the display element 43 and the collision noise. However, since the leaf spring 51 is used to elastically support the roller, the life of the leaf spring is short, about 3000 hours, and even after about 500 hours, cracks and deterioration of restorability tend to occur, resulting in variations. . Furthermore, since the display element 43 and the roller collide at one point, it is difficult to adjust the roller position, resulting in high costs.

In order to solve the above-mentioned problems, the present invention reduces wear and collision noise at the collision part of the display element, enables reliable reversal, makes it easy to adjust the position of the collision part, and has a support mechanism with a long life. An object of the present invention is to provide a fluid display device.

[Means for solving problems]

In order to achieve the above object, the fluid display device of the present invention has a rotatable display element with a front and back surface as display surfaces and a magnetic piece embedded in the end part attached to an endless conveyance track, and the endless conveyance track is kept constant. In a fluid display device that displays information by attracting the magnetic piece using external magnets provided in the writing head section and the erasing head section while rotating in the direction of the writing head section and inverting the display element at the collision section, the collision of the erasing head section. The device includes a roller whose portion is rotatable, a guide plate that rotates the display element while continuously being in contact with the roller, and a support mechanism in which the roller and the guide plate are elastically supported by a coil spring.

[Effect]

The fluid display device of the present invention, as shown in FIG.
Since the collision section 18 that collides with one end of the display element 13 of the erasing head section 16 and reverses it in a certain direction is composed of a rotatable roller 19, the roller rotates when the display element 13 collides with the other end of the display element 13, thereby preventing the display element 13 from colliding. Abrasion and collision noise can be reduced.

In addition, the conventional collision part using rollers made contact with the display element at one point, making it difficult to adjust the position of the collision part; however, in the present invention, the display element 13 is rotated while being in continuous contact with the roller 19. Since the display element 13 is gradually inverted while contacting the guide plate 20 along the guide plate 20,
Reliable reversal with fewer malfunctions is possible, and slight positional deviation of the collision portion 18 is not a problem, so adjustment costs can be reduced.

Furthermore, since the roller 19 and the guide plate 20 are elastically supported by the coil spring 21 in the direction of arrow A, the shock of the display element 13 when it collides is softened, further reducing wear and collision noise, and erasing with fewer malfunctions. It can be a head part.

〔Example〕

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

Fig. 1 is a bottom view of the erasing head section of one embodiment, Fig. 2 is a sectional view of the roller of one embodiment, Fig. 3 is a bottom view of the writing head section, and Fig. 4 is an overall configuration diagram of the fluid display device. , of which a is a bottom view and b is a front view.

In the figure, 11a and 11b are display surfaces, 12 is a magnetic piece, 13 is a display element, 14 is an endless conveyance track,
15 is a write head section, 16 is an erase head section,
17 is an external magnet, 18 is a collision part, 19 is a roller,
20 is a guide plate, 21 is a coil spring, 22 is a rotating shaft, 23 is a rotation prevention plate, 24 is a bearing, 25 is a base, 26 is urethane rubber, 27 is a bearing, 2
8 is a display section, 29 is a rotating roller, and 30 is a shaft.

The fluid display device of this embodiment is as shown in FIG.
Rotating shaft 2 in the depth direction of the figure on the endless conveyance track 14
2 is attached, and the front and back surfaces are attached to the display surface 11.
A, 11b, and a large number of rotatable display elements 13 with magnetic pieces 12 (iron pieces here) embedded in the ends are mounted. The endless conveyance track 14 on which the display element 13 is mounted is rotated by rotating rollers 29 in the directions of arrows B, C, and D, as shown in FIG. 4a.
Characters, figures, symbols, etc. are displayed by selectively inverting the front and back surfaces of each display element 13. Such a display means is generally called a techno sign.

The reversal of the display element 13 is performed by a write head 15 which forms the display and an erase head 16 which returns the formed display to a blank state, as shown in FIGS. 4a and 4b. The structure of the write head section 15 is as shown in FIG.
The external magnet 17 is installed in the cut of the rotation suppression plate 23 while
(using an electromagnet) to selectively attract the magnetic piece 12, and only the display element 13 to be reversed is rotated 90° and made to stand. When the standing display element 13 moves further to the left, it hits the collision part 18 and rotates by 90 degrees, causing the display surface to be reversed. The display element 13 that is not attracted does not hit the collision part 18, and the display surface does not invert. In this way, the display surface 11a of the display element 13 before writing is selectively reversed to the display surface 11b by the writing head for display.

The display formed by the writing head 15 in FIG. 4a is displayed on the display section 28, returns to the erasing head section 16, and is then inverted again to unify the display surface (for example, the display surface 11a). will be held.

The erase head section of this embodiment is shown in FIGS. 1 and 2.
As shown in the figure, a collision portion 18 for colliding one end of the display element 13 and reversing it in a certain direction is provided with a roller 19 rotatably configured by a bearing 27 or the like. By suitably using urethane rubber 26 on the outer peripheral portion of this roller 19, wear of the display element 13 and collision noise can be further reduced. The guide plate 20 supports the roller 19 and gradually rotates the display element 13 that has collided with the roller 19 while continuing to contact the display element 13 at the curved surface portion. Further, the guide plate 20 itself is rotatably supported by a Teflon bearing 24,
Pass the shaft 30 through the guide plate 20 and attach the coil spring 2.
By elastically supporting the impact portion 18 with the support member 1, the collision portion 18 can have an elastic structure.

As shown in FIG. 1, in the flow display device of this embodiment having the above configuration, when the endless conveyance track 14 moves from right to left (in the direction of arrow B), the rotation suppressing plate 2
Since the external magnet 17 (a permanent magnet is used here) attracts the magnetic piece 12 at the cut point 3, all the display elements 13 passing through this point are made to stand vertically.
The display element 13 further moves to the left and starts rotating when the lower part of the display element 13 collides with the roller 19 of the collision part 18. The impact at the time of a collision is softened by the elastic structure of the coil spring 21 and the urethane rubber of the roller 19, so there is almost no collision noise and there is little wear. The coil springs used in the elastic structure of the collision part have a longer lifespan than conventional leaf springs, and have the advantage of not requiring complicated replacements. Display element 1
3 is continuously guided by the roller 19 and rotated gradually along the curved surface of the guide plate 20. Therefore, even if the position of the collision part 18 is slightly shifted, it is corrected by the guide plate 20 and the reversal is prevented. It will definitely be done. Therefore, the cost for position adjustment, which was conventionally necessary, can be reduced.

[Effect of idea]

As described above, the fluid display device of the present invention has low abrasion and collision noise at the collision part of the display element, enables reliable reversal, makes it easy to adjust the position of the collision part, and reduces costs. The service life of the parts can be extended.

[Brief explanation of the drawing]

Fig. 1 is a bottom view of the erasing head section of one embodiment, Fig. 2 is a sectional view of the roller of one embodiment, Fig. 3 is a bottom view of the writing head section, and Fig. 4 is an overall configuration diagram of the fluid display device. , where a is the bottom view, b is the front view, and the fifth
7 through 7 are bottom views of conventional erasing heads. In Figures 1 to 4, 11a, 11b
is a display surface, 12 is a magnetic piece, 13 is a display element, 14
15 is an endless transport track, 15 is a writing head section, 16 is
1 is an erasing head section, 17 is an external magnet, 18 is a collision section, 19 is a roller, 20 is a guide plate, 21 is a coil spring, 22 is a rotating shaft, 23 is a rotation inhibiting plate, 24
is the bearing, 25 is the base, 26 is urethane rubber, 2
7 is a bearing, 28 is a display section, 29 is a rotating roller, and 30 is a shaft.

Claims (1)

[Claims for Utility Model Registration] (1) A rotatable display element 1 whose front and back surfaces are display surfaces 11a and 11b, and a magnetic piece 12 is embedded in the end.
3 is attached to the endless transport track 14, and while the endless transport track 14 is rotated in a fixed direction, the magnetic piece 12 is attracted by the external magnet 17 provided in the write head section 15 and the erase head section 16, and the magnetic piece 12 is attracted by the collision section 18. In a fluid display device that displays information by inverting the display element 13, the colliding portion 18 of the erasing head 16 includes a rotatable roller 19, and a guide that rotates the display element 13 while being connected to and in contact with the roller 19. A fluid display device comprising a support mechanism in which a plate 20, the roller 19, and the guide plate 20 are elastically supported by a coil spring 21. (2) The fluid display device according to claim 1, wherein the roller 19 is made of urethane rubber.