JPH04389Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention can be used for various displays such as weather information, air pollution information, road conditions, destination information attached to the head of buses and trains, and advertising. Regarding display devices that can be used.

``Prior Art'' As shown in FIG. 9, a conventional display device is constructed by arranging a large number of display elements 5 in a matrix, each connected to a control means 100. As shown in FIG. 10, each display element is provided with a disc-shaped disk 20 having two display surfaces, front and back. The disk 20 has a pair of rotating shafts 21 extending in opposite directions from the periphery of the disk in a diametrical direction passing through the center of the disk surface. The disk 20 is a permanent magnet in which the apex portions of a disk divided into left and right sides around a rotating shaft 21 are magnetized into north and south poles. The rotating shaft 21 is appropriately supported by a support member, but not shown. On the other hand, a U-shaped stator pin 22 made of a magnetic material is provided at the illustrated position where one plane formed by the U-shape passes through the center of the disk 20 and is orthogonal to the rotation axis. A winding 23 is provided around the central portion of the stator pin 22, both ends of the winding are connected to a set terminal 24 and a reset terminal 25, and the middle of the winding is connected to a common terminal 26.

As shown in FIG. 10A, when a pulse current is passed from the common terminal 26 toward the set terminal 24, the stator pins 22a and 22b are magnetized to the S and N poles, respectively, and the N and S poles of the disk 20 are respectively magnetized. one display surface (for example, the color surface) is displayed.

On the other hand, as shown in FIG. 10B, the common terminal 2
When a pulse current is applied from 6 to the reset terminal 25, the stator pins 22a and 22b are magnetized in the opposite direction, so that the disk 20 displays the opposite display surface (for example, a black surface). In both cases, materials with large residual magnetism are selected for the stator pins 22a and 22b so that, once magnetized, the stator pins 22a and 22b maintain that state even when the current is cut off.

A desired pattern is displayed by passing pulses in either the set direction or the reset direction to the winding 23 as described above for each display according to the pattern of figures and characters displayed by the control means 100. I can do it.

One display element is constructed by housing the plurality of members shown in FIG. 10 and other members in one case.

"Problems with the Prior Art" In conventional display devices, when the number of display elements increases from several hundred to several thousand, the number of wires from the control means to the coils of each display element also increases proportionally, resulting in a reduction in wiring man-hours. The disadvantage is that it becomes extremely large. In addition, for large quantity display elements, the disk must be made of a permanent magnet, the stator pin must be made of a material with high residual magnetism, and the stator pin must be wound, resulting in a complex structure and relatively high material costs. Therefore, it had the disadvantage of high cost.

The purpose of this invention is to reduce the above-mentioned wiring man-hours and reduce the cost of the display element, thereby providing an economical display device as a whole.

"Means for Solving the Problem" According to this invention, a plurality of drive shafts are arranged parallel to each other and at equal intervals in a first direction, and a plurality of drive shafts are arranged to form a matrix with the plurality of drive shafts. A plurality of control boards are provided, which are movable back and forth in a second direction perpendicular to the first direction, are arranged at equal intervals, and are stopped at a plurality of predetermined positions, and a plurality of display elements are connected to each of the above-described drives. The control plates are arranged at equal intervals for each of the control plates, and are rotatable with friction on an axis. Each control plate is provided with a stopper means for each display element, and when the display element rotates in one direction at the stop position of the control plate, the stopper means can engage with the display element; The above movement of the control plate also releases the engagement. The control plate is moved to the predetermined stop position by the moving means, and the plurality of drive shafts are sequentially rotationally driven by the rotational driving means.

"First Embodiment" A first embodiment of this invention is shown in FIG. A plurality of drive shafts 1 ₁ ... 1 _n parallel to the Y axis (first direction)
are arranged at equal intervals in the X-axis direction (second direction),
A plurality of control plates 2 ₁ . . . 2 _o are arranged parallel to the X-axis and at equal intervals in the Y-axis direction so as to form a matrix with these drive shafts. Drive shaft 1 _i (i=1~
m) is cylindrical or cylindrical and elongated, made of metal or non-metallic material, and has one end connected to rotational drive means 3 _i
(i=1 to m). Control board 2 _j (j=1
~n) is elongated and plate-like, and is made of, for example, a metal material, and is connected at one end to the moving means _4j (j=1~n).

Display element 5 _i1 ... on drive shaft 1 _i (i=1~m)
5 _io are rotatably attached to each control plate 2 ₁ . . . 2 _o at equal intervals with friction. The display element corresponding to the intersection point of the drive shaft 1 _i and the control plate 2 _j is indicated by 5 _ij . As shown in FIG. 2, the drive shaft 1 _i is arranged to pass through a long hole 6 _ij formed in the control plate 2 _j (j=1 to n).

On the control plate 2 _j (j=1 to n), a stopper 7 _i (i=1 to m+1) for engaging with the display element is cut out from the plate surface of the control plate at a position midway between the adjacent elongated holes 6. It is placed perpendicular to the surface of the board. Square hole 8 _i
is the hole created by cutting and raising the stopper _7i .
Each control board 2 ₁ ... 2 _o is connected to a moving means 4 ₁ ... 4 _o
can be slid left and right in the longitudinal direction, and the left end of the long hole 6 _ij is slid to the right until the left end of the long hole 6 _ij contacts or closely opposes the left circumferential surface of the drive shaft 1 i (Fig. 2A). or a state in which the right end of the elongated hole _6ij contacts or closely opposes the right peripheral surface of the drive shaft _1i (Fig. 2B). I can do it. In the former case, the left and right stoppers 7 _{i and} 7 _i+1 of the drive shaft 1 i take positions closest to or farthest from the drive shaft 1 _i , respectively. Conversely, in the latter case, the left and right stoppers 7 _i and 7 _i+1 of the drive shaft 1 i take the positions furthest from or closest to _the drive shaft 1 _i , respectively. As will be described later, the control board 2 of FIGS. 2A and B
The state _j corresponds to the stop position of the control board when displaying one display surface and the other display surface of the display element 5 _ij , respectively.

The display element 5 is attached to the front plate 1 as shown in FIG.
0, the back plates 11 are opposed to each other, and one side of each is connected by a side plate 12 to form an integral U-shape.
Surfaces 5a and 5b opposite to the mutually opposing surfaces of the front plate 10 and back plate 11 are referred to as surface A and surface B, respectively. These surfaces are colored to provide easy contrast to each other (for example, one side is white and the other is black). Drive shafts 1 are provided along the central axis A-A' of the display element in the central portions of the opposing surfaces of the front plate 10 and the back plate 11, respectively.
Fitting grooves 14a and 14b for fitting are provided. The bottom part of the front plate 10 has a central part that fits with the drive shaft 1, that is, an arc-shaped projection 10a in the figure.
and the protrusion 10 at the end farthest from the central axis A-A'
A notch 15 is formed by cutting along an arc centered on the central axis A-A', leaving the portions b and 10c. Furthermore, the bottom portion of the side plate 12 also has the above-mentioned notch 15.
A notch 16 is formed at the same depth as .

On the other hand, on the side plate 12 side of the inner surface of the back plate 11 facing the front plate 10, a jetty 13 is formed which rises in an undulating shape from the plate surface.

The display element is made of an elastic synthetic resin material, metal material, etc., and when it is not fitted to the drive shaft 1, the distance between the front plate 10 and the back plate 11 is larger on the end side of the opening 17 without the side plate than on the side plate 12 side. The center axis A of the fitting grooves 14a and 14b is set somewhat shorter.
The distance from -A' is set to be somewhat smaller than the radius of the drive shaft 1. The display element is attached to the drive shaft by placing the edge of the opening 17 on the drive shaft 1 and pushing the display element against the elasticity of the display element until the fitting grooves 14a and 14b are fitted with the drive shaft 1. In this state, the gap between the fitting grooves 14a and 14b is expanded compared to the state before fitting, and the display element comes to sandwich the drive shaft by its own elasticity.
It is frictionally and rotatably mounted in that position.

FIG. 4 shows a front view, a top view, a bottom view, and a left side view of a state in which a display element of a different type from that shown in FIG. 3 is attached to the drive shaft 1. The display element 5 is not square as shown in FIG. 3, but has a curved outer peripheral surface. For ease of understanding, the bottom view of FIG. 4C is a view seen through the control board 2, that is, from the bottom side assuming that the control board 2 is transparent.

In this invention, display elements arranged in a matrix are attached to each drive shaft in each vertical row, and a designated one of display surfaces A and B is displayed on the front side, starting from the left side, for example.

That is, when the display surface A of a certain display element is to be positioned in front, the corresponding control board 2 is shifted to the right to the position A in FIG. 2, and then the corresponding drive shaft is rotated a little more than 180 degrees counterclockwise. . In that case, as shown in FIG. 5A (plan view), if the display surface B is initially located in front, the display element _5ij will rotate 180 degrees together with the drive shaft _1i , and as shown in FIG. _{As shown in FIG .}
In other words, only the drive shaft 1 _i rotates slightly and stops against the force that presses the drive shaft 1 _i with the fitting grooves 14a and 14b shown in FIG.
In this way, display surface B is switched to display surface A. As shown in FIG. 5B (plan view), if display surface A is initially located in front,
Since the jetty 13 of the display element 5 _ij is already in contact with the stopper 7 _i of the control board 2 _j , only the drive shaft 1 _i will similarly rotate a little more than 180 degrees, and the display surface A will continue to maintain its front position. Hold.

When positioning the display surface B of a certain display element in front, shift the corresponding control plate 2 to the left to the position shown in FIG. 2B, and then rotate the corresponding drive shaft 1 by a little over 180 degrees counterclockwise. . In that case, as shown in FIG. 6A (plan view), if the display surface A is initially located in front, the display element 5 _ij rotates 180 degrees together with the drive shaft 1 _i , and as shown in FIG. 6B ( As shown in the top view), the display surface A is switched to the display surface B.
As shown in FIG. 6B (plan view), if the display surface B is initially located at the front, only the drive shaft 1 _i rotates, and the display surface B continues to maintain the front position. The mechanism for switching these display screens or maintaining the previous state is the same as the example shown in FIG.

"Second Embodiment" FIG. 7 shows a plan view of the main parts of the second embodiment. When viewed from above, the display element 5 has a rounded triangular outer shape and has three display surfaces A, B, and C. The control plate 2 is provided with a stopper 7 and a long hole 6 as in the first embodiment. However, the control plate 2 is shifted longitudinally and stops at three different positions.
That is, this is a case where the control plate 2 is stopped so that the drive shaft 1 is located at the left end, center, or right end of the elongated hole 6. In each case, the stoppers take the positions shown by 7, 7', and 7'' in the figure. The drive shaft 1 rotates counterclockwise by a little more than 240 degrees. On the bottom side of the display element 5, there are stoppers 7, 7', 7'', jetties 13a, 13b, and 13c are provided at 120 degree intervals. The distances from the central axis O of rotation to each jetty are different, and increase in the order listed above. In the figure, the jetty 13a is in contact with the stopper 7,
This shows the case where the display surface A is positioned in front.
In the area indicated by dotted hatching on the display element 5, the display element 5 is driven by the drive shaft 1 so that the stoppers 7, 7' or 7'' are connected to the jetties 13a, 13b, respectively.
and 13c, and a notch 16 provided to prevent the stopper 7 (7' or 7'') from coming into contact with the control plate 2 when shifting the control plate 2 in the longitudinal direction. It is.
When the control plate 2 is shifted to place the stopper at position 7' and the drive shaft 1 is rotated, the jetty 13b comes into contact with the stopper 7' and the display surface B is positioned in front.
If the stopper is placed at the 7'' position and the drive shaft 1 is rotated, the jetty 13c will come into contact with the stopper 7'' and the display surface C will be positioned in front. Mechanisms related to switching the display surface or maintaining the same display surface are similar to those in the first embodiment, so detailed descriptions thereof will be omitted.

"Third Embodiment" FIG. 8 shows a plan view of the main parts of the third embodiment. The display element 5 _ij has a cubic appearance and has four display surfaces A, B, C, and D. Further, the control board 2 is shifted in the longitudinal direction corresponding to each display surface, and has four stopping positions, and each shift is called a maximum right shift, a maximum left shift, a right shift, and a left shift. The bottom side of the display element 5 _ij is provided with notches 15 and 1 to prevent the stopper from hitting when the display element 5 _ij is rotated or the control plate 2 _j is shifted.
6 are provided as in the previous embodiments, and these notches are indicated by dotted hatching in the figure.

The case where display screens A and B are switched is shown in Fig. 8A,
Shown in B. This case is similar to the first embodiment.
Control plate 2 _j is shifted maximum to the right or left, respectively.

The case where the display screens C and D are switched is shown in Fig. 8C,
Shown in D. In this case, the jetty 13 provided on the bottom side
b is used instead of the jetty 13a, and the control plate 2
_j is shifted right or left.

Similarly, display can be switched between adjacent display surfaces, for example, display surface B and display surface D. In that case, the rotation angle of the drive shaft will be small to just over 90 degrees, and the shift range of the control plate _2j will also be small.

It is also possible to switch between the four display surfaces by controlling the control plate _2j to the four shift states mentioned above and rotating the drive shaft _1i by a little more than 270 degrees.

In addition, the display element 5 _ij is made of a transparent body, a light source is provided on the back side of the display element, and the display surfaces A and B are white or black, respectively, and the display is switched between white and black without using a light source during the day, and the light source is used only at night. to switch between side B (black) and side C or side B and side D. In this case, depending on whether or not transmitted light is visible from the front side, figures, characters, and other items can be displayed as in the daytime. The rest is the same as the first and second embodiments, so the explanation will be omitted.

Note that the control plate 2 shown in each of the above embodiments has a long hole 6.
It is also possible to have a structure in which a part of one side edge surrounding the frame is cut out. In other words, the elongated hole 6 is deformed into a curved shape rather than a hole. Further, although the drive shaft 1 is assumed to rotate counterclockwise, it can also be rotated clockwise if the jetty is provided on the surface opposite to the surface on which it has been provided so far.

``Effect of the invention'' According to this invention, the display element does not require a display plate made of permanent magnets, a stator pin with large residual magnetism, or a winding for magnetizing the stator pin, as in the past. The display element can be composed of an individual that is nothing more than a display board that has nothing to do with magnets or electricity. Therefore, there is no need for electrical wiring from the control means to each display element (m x n pieces), and only a few wirings from the rotating shaft drive means (m pieces) and the moving means (n pieces) are sufficient instead. Therefore, the number of wiring steps can be significantly reduced compared to the conventional method.

The display element only needs to be rotatable with friction on the drive shaft, and since it has a structure suitable for mass production, it can be realized at low cost as a molded part using a material such as synthetic resin.

As mentioned above, this invention makes it possible to provide a display device that is more economical than before.
The practical effects are huge.

[Brief explanation of drawings]

Fig. 1 is a block system diagram showing the first embodiment of this invention, Fig. 2 is an external view of the control board in Fig. 1, and Fig. 3 is an external view of the control board in Fig. 1.
4 is an external view showing a first example of the display element shown in FIG. 1, and FIGS. 4A, B, C, and D are front views showing a second example of the display element shown in FIG. The top view, bottom view, left side view, and FIGS. 5 and 6 show the display element for explaining the operation of each member when displaying display surface A or display surface B, respectively, of the display element in FIG. 4. Fig. 7 is a plan view of the main parts centered on the display element used in the second embodiment of this invention, and Fig. 8 is a plan view of the main parts used in the third embodiment of this invention. 9 is a block system diagram of a conventional display device, and FIG. 10 is an external view for explaining the structure and operation of the display device shown in FIG. 9. be. DESCRIPTION OF SYMBOLS 1... Drive shaft, 2... Control board, 3... Rotating shaft drive means, 4... Moving means, 5... Display element, 6...
...Long hole, 7...Stopper, 8...Square hole, 10...
...Front plate, 10a, 10b, 10c...Protrusion, 1
1... Back plate, 12... Side plate, 13... Jetty, 1
4... Fitting groove, 15, 16... Notch, 17... Opening, 20... Disc, 21... Rotating shaft, 22...
...Stator pin, 23...Winding, 24...Set terminal, 25...Reset terminal, 26...Common terminal, 100...Control means.

Claims (1)

[Claims for Utility Model Registration] A plurality of drive shafts arranged parallel to each other and at equal intervals in a first direction; a plurality of control plates movable back and forth in two directions, arranged at equal intervals and stopped at a plurality of predetermined positions; and each of the control plates rotatable with friction on each drive shaft. a plurality of display elements arranged at equal intervals in each of the control boards; and each control board is provided with each display element, and is engaged with the display element by rotation of each of the display elements in one direction at the stop position of the control board. a plurality of moving means for moving the plurality of control plates to predetermined positions; and a rotation drive for sequentially rotating the plurality of drive shafts. The display element has an opening parallel to the drive shaft formed at one end thereof, and is generally formed in a U-shape when viewed from the direction of the drive shaft, and the drive shaft is arranged on the opposing inner surface of the display element. A display device characterized in that a pair of fitting grooves are formed to be elastically sandwiched, and the display device can be freely attached to and detached from the drive shaft through the opening.