JPH0627991B2 - Display element - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a display element that constitutes a pixel of a large display device.

[Prior art]

Conventionally, there is known a large-sized display device used for the purpose of displaying a score or a player's name in a sports arena or displaying the time and temperature on the outer wall of a building. Each pixel of this type of display device is composed of independent display elements. As the display element, for example, Japanese Utility Model Publication No. 59-43586
Those disclosed in Japanese Patent Publication No. 55-138487 and Japanese Patent Publication No. 55-134887 are known. These display elements are provided with electromagnetic drive means having a frame that swings like a pendulum,
The display plate is configured to slide via a complicated link mechanism that constitutes a so-called Scott Russell mechanism together with the display plate.

[Problems to be Solved by the Invention]

In the above-mentioned conventional structure, in order to use the Scott-Russell mechanism, a plurality of shaft fulcrums are provided in the link mechanism, and these shaft fulcrums are provided in the case in which the electromagnetic drive means, the link mechanism, the display board, etc. are installed. It is necessary to provide. That is, since the case cannot be removed and used, the distance between the display plates is increased by the thickness of the case, and the display plates cannot be arranged at a high density. Moreover, since a case must be provided for each display plate, a large number of cases are required to form a large-sized display device, resulting in a high cost. The present invention is intended to solve the above problems, and by making a display unit that drives a display plate independent of the case, it is possible to use only the display unit without using the case. A display element that arranges the boards at a high density, reduces the cost of the case, and prevents the distance between the front of the case and the display board from becoming too large when installed in the case. It is the one we are trying to provide.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the constitution of claim 1, at least a front surface is provided with a case, and a display plate undulating between a position substantially parallel to the front surface of the case and a position intersecting with the front surface of the case. A display unit detachably mounted in the case is provided, an iron core around which a coil whose one end is fixed to a base is wound is provided in the display unit, and the other end surface of the iron core is provided on the display plate. The permanent magnets that can exert a magnetic force between them are fixed, the connecting member is fixed to the iron core, and the display plate is pivoted on the connecting member at a position where the magnetic force between the iron core and the permanent magnet allows the display plate to rotate. In the attached display element, the center of rotation of the display plate is provided at a position parallel to the back surface of the display plate and deviated from the center in the direction orthogonal to the axial direction of the center of rotation. According to the structure of claim 2, the weight reducing portion is provided on the wide area side of the rotation center of the display plate so as to position the center of gravity of the display plate near the rotation center. According to the third aspect of the present invention, the increasing portion for increasing the weight is provided on the narrow area side of the display plate with respect to the rotation center so that the center of gravity of the display plate is located near the rotation center.

[Action]

According to the structure of claim 1, since the display unit is detachably housed in the case and the display unit has the above structure, the display plate can be rotated only by the display unit without the case. Of. That is, when a display device is configured using a plurality of display elements, it is possible to use only the display unit without using the case, and it is possible to increase the arrangement density of the display plates by the thickness of the case. Furthermore, the cost can be reduced by the number of cases. Further, at the time of assembling, the display unit can be assembled independently of the case, which facilitates the assembling work. In addition, since the center of rotation of the display plate is displaced from the center in the direction parallel to the back surface of the display plate and orthogonal to the axial direction of the center of rotation, the narrow area side with respect to the center of rotation moves forward when the display plate is undulated. When the display unit is projected, the distance between the front surface of the case and the display plate can be made relatively small when the display unit is installed in the case, and the display plate can be easily seen in the display state. According to the configurations of claims 2 and 3, a weight reducing portion for reducing the weight is provided on the wide area side of the display plate with respect to the center of rotation so that the center of gravity of the display plate is located near the center of rotation, or in the display plate. On the narrow area side with respect to the center of rotation, there is an increasing part that increases the weight so that the center of gravity of the display plate is located near the center of rotation. The force required to undulate can be made almost constant. In particular, the configuration of claim 2 leads to weight reduction of the display plate, and therefore has an advantage that power consumption is reduced.

First Embodiment FIG. 1 shows a state in which the display unit 1 is mounted in the case 2, and FIG. 2 shows a state in which the case 2 is removed. The display unit 1, as shown in FIG. 1 and FIG.
A rod-shaped iron core 12 erected on a base 11 made of synthetic resin
The coil 14 is wound around the coil bobbin 13 that is integrally formed with the base 11 and has the iron core 12 inserted therethrough.
The coil 14 has two windings connected in series, or 1
A tap is provided in the middle of the winding, and has three terminal wires. Each terminal wire has an iron core 1 on the base 11.
2 are respectively connected to three terminal pins 15 projecting on the surface opposite to the surface on which 2 is erected. A substantially U-shaped bearing 16 is integrally formed as a connecting member at an end of the coil bobbin 13 different from the base 11. A bearing hole 16a is formed in each of the leg pieces of the bearing 16, and the tip of the iron core 2 projects from the center of the lateral piece of the bearing 16. Bearing hole 16a
Is provided at a position displaced from the center line of the iron core 12.
The bearing hole 16a has a rotating shaft 18 provided on the back surface of the display plate 17.
Is inserted from the inside of the leg piece, and the display plate 17 is rotatably attached to the iron core 12. A display sheet 20 is attached to the front surface of the display board 17. As shown in FIG. 3, a pair of protrusions 17a are provided on the back surface of the display plate 17, and a rotary shaft 18 is integrally provided on one side of each protrusion 17a. In addition, a permanent magnet 19 magnetized in the thickness direction of the display plate 17 is arranged between the projecting pieces 17a. Here, the rotary shaft 18 is provided in a plane parallel to the back surface of the display plate 17 and offset from the central position of the display plate 17 in a direction orthogonal to the axial direction of the rotary shaft 18. On the large-area side of the display plate 17 with respect to the rotating shaft 18, the weight-reducing portion 1 including a thin-walled portion is provided.
7b is formed, and the weight reducing portion 17b is formed so as to be substantially symmetrical with respect to the axial direction of the rotary shaft 18.
That is, the rotary shaft 18
With respect to a straight line that is orthogonal to and passes through the center of the display board 17,
The weight reducing portion 17b is provided in line symmetry. The weight reducing portion 17b is formed so that the center of gravity of the display plate 17 is located near the rotation axis 18. As described above, the display board 1
Since the sheet 20 is attached to the front face of the weight reduction unit 17,
The b may be a through hole that penetrates the front and back of the display plate 17 instead of the thin portion. Also, if it is not a through hole,
The front surface of the display board 17 may be painted instead of the sheet 20. According to the above configuration, when one of the three terminal pins 15 is used as a common terminal and the iron core 12 is energized in a direction in which the iron core 12 attracts the permanent magnet 19 with one of the remaining terminals,
The display plate 17 is substantially parallel to the tip surface of the iron core 12. At this time, the back surface of the display plate 17 comes into contact with the front surface of the bearing 16 to regulate the position. Further, when electricity is applied between the common terminal and the other of the remaining terminals in the direction in which the iron core 2 repels the permanent magnet 19, the display plate 17 falls to a position substantially perpendicular to the tip surface of the iron core 12. . At this time, the back surface of the display plate 17 comes into contact with the upper surface of the bearing 16 to regulate the position. Therefore, if the front side of the iron core 12 is the front side (left side in FIG. 1),
As the coil 14 is energized, the surface of the display plate 17 can be seen or disappeared from the front. In this way, the display state and the non-display state are switched. In addition, as described above, the display panel 17 includes the weight reduction unit 17
Since b is provided, the center of gravity of the display plate 17 is located near the rotation shaft 18, and the weight reducing portion 17b is formed line-symmetrically with respect to the center line of the display plate 17.
On the other hand, since the load of the display plate 17 is applied substantially evenly, the wear of the rotary shaft 18 can be reduced. Further, by forming the weight reducing portion 17b on the display plate 17, the display plate 17 is lightened and power consumption is reduced. The case 2 is formed by combining a rectangular tube-shaped case body 21 having one bottom surface opened and the other bottom surface closed, and a transparent cover 22 that covers the opening surface of the case body 21 in a closed manner. . The base 11 is fitted in a recess 23 provided on the inner surface of the bottom wall of the case body 21,
It is fixed to the case body 21 by a fixing screw 24 inserted from the outside of the case body 21 through the bottom wall of the case body 21. Further, a protrusion 25 having a cylindrical outer surface is formed on a portion of the outer surface of the bottom wall of the case body 21 surrounding the base 11. Terminal pin 15 in display unit 1
Is pulled out from the case main body 21 through the front end surface of the protrusion 25. The transparent cover 22 has a corner portion formed to have a curved surface with a relatively large radius of curvature. Thus, by forming the transparent cover 22 into a curved surface, it is possible to reduce the shadow of the transparent cover 22 on the display plate 17. By the way, the case body 21 is made of an opaque material, and the opening surface of the case body 21 is at a position where the display plate 17 is substantially parallel to the front end surface of the iron core 12.
It is formed so as to be located on substantially the same plane as 7 or slightly closer to the iron core 12. This makes it possible to make the display plate 17 visible as much as possible from the front direction, while making the back surface of the display plate 17 invisible. When the display element configured as described above is fixed to the mounting plate 3 in a state of being housed in the case 2, an annular waterproof packing 31 fitted around the protrusion 25 is used (see FIG. 1). . The waterproof packing 31 is formed by integrally forming an inner ring 32 that comes into close contact with the protrusion 25 and an outer ring 33 that is formed so as to have a diameter that increases toward the mounting plate 3 by using an elastic material. The thickness of the waterproof packing 31 in the protruding direction of the protrusion 25 is set to be slightly larger than the protrusion amount of the protrusion 25. However, the mounting plate 3 is formed with a mounting hole 34 through which the terminal pin 15 and the fixing screw 24 are exposed, and the waterproof packing 31 is fitted around the protrusion 25, and the mounting plate is located outside the mounting hole 34. When the mounting screw 35 is screwed into the tip surface of the protrusion 25 through the waterproof packing 31, the waterproof packing 31 is compressed between the case body 21 and the mounting plate 31, and the water from the front surface side to the rear surface side of the mounting plate 31 is compressed. Infiltration can be prevented. Further, when a plurality of display elements are collectively covered with a large transparent plate, the display unit 1 alone can be used without using the case 2. That is, as shown in FIG. 2, the terminal pin 15 of the display unit 1 is electrically connected to the conductive pattern of the printed wiring board 36, and the base 1 is fixed by the fixing screw 24.
1 may be mechanically fixed to the printed wiring board 36. With this use, the number of display units 1 per unit area can be increased as compared with the case 2 used. In the above embodiment, the rotary shaft 18 is provided on the display plate 17,
Although the bearing 15 is provided on the coil bobbin 13, conversely, the bearing may be provided on the display plate 17 and the rotating shaft may be provided on the coil bobbin 13.

Second Embodiment In the present embodiment, instead of providing the weight reducing portion 17b on the wide area side of the display plate 17 with respect to the rotating shaft 18, the weight reducing portion 17b is used in FIGS.
As shown in the figure, an increasing portion 17c is provided on the narrow area side of the display plate 17 with respect to the rotating shaft 18. The increasing portion 17c holds a metal balancer 17e as a weight between a pair of holding protrusions 17d, and both ends of the balancer 17e are press-fitted into the holding protrusions 17d. This increase section 1
7c is the same as the weight reducing portion 17b of the first embodiment.
It is provided so that its center of gravity is positioned near the rotation shaft 18, and is formed in a line-symmetrical shape so that the load applied to both rotation shafts 18 is even. According to the above configuration, the weight of the display plate 17 is increased, but as compared with the first embodiment, there is an advantage that the shape of the mold is simple and the manufacturing is easy. Other configurations and effects are the same as those in the first embodiment, and thus the description thereof is omitted.

【The invention's effect】

As described above, according to the structure of claim 1, since the display unit is detachably housed in the case and the display unit has the above structure, the display plate can be rotated without the case even with only the display unit. It can be moved.
That is, when a display device is configured using a plurality of display elements, it is possible to use only the display unit without using the case, and it is possible to increase the arrangement density of the display plates by the thickness of the case. Furthermore, the cost can be reduced by the number of cases. Also, when assembling,
Since the display unit can be assembled independently of the case, there is an advantage that the assembling work becomes easy. In addition, since the center of rotation of the display plate is displaced from the center in the direction parallel to the back surface of the display plate and orthogonal to the axial direction of the center of rotation, the narrow area side with respect to the center of rotation moves forward when the display plate is undulated. When the display unit is projected, the distance between the front surface of the case and the display plate can be made relatively small when the display unit is housed in the case, and the display plate is easy to see in the display state. Of. According to the configurations of claims 2 and 3, a weight reducing portion for reducing the weight is provided on the wide area side of the display plate with respect to the center of rotation so that the center of gravity of the display plate is located near the center of rotation, or in the display plate. On the narrow area side with respect to the center of rotation, there is an increasing part that increases the weight so that the center of gravity of the display plate is located near the center of rotation. The force required to undulate can be made almost constant. The configuration according to claim 2 has an advantage that the power consumption is reduced because the weight of the display plate is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the same with the case removed, and FIGS. 3 (a) and 3 (b) are rear views of a display plate used for the same. And FIG. 4 is an exploded perspective view showing Embodiment 2 of the present invention, and FIGS. 5 (a) and 5 (b) are a rear view and a side view of a display plate used therein, respectively. 1 ... Display unit, 2 ... Case, 11 ... Base, 1
2 ... iron core, 14 ... coil, 16 ... bearing, 17 ...
Display plate, 17b ... reduction section, 17c ... increase section, 18 ...
… Rotating shaft, 19 …… Permanent magnet, 21 …… Case body, 2
2 ... Transparent cover.

Claims (3)

[Claims] 1. A case, which has at least a front surface transparent, and a display plate which undulates between a position substantially parallel to the front surface of the case and a position intersecting the front surface of the case, and is detachably mounted in the case. And a display unit, wherein the display unit is
It has an iron core with one end fixed to a base and a coil wound around it, and a permanent magnet that can exert a magnetic force between the iron core and the other end surface of the iron core is fixed to the display plate. A display element, in which a connecting member is fixed and the display plate is pivotally attached to the connecting member at a position where the display plate can be rotated by the magnetic force between the iron core and the permanent magnet, A display element comprising a rotation center at a position parallel to and offset from the center in a direction orthogonal to the axial direction of the rotation center. 2. The weight reducing portion is provided on the wide area side of the display plate with respect to the center of rotation so as to position the center of gravity of the display plate near the center of rotation. Display element described. 3. The display plate is provided with an increasing portion for increasing the weight so as to position the center of gravity of the display plate near the rotation center on the side of the narrow area with respect to the rotation center. Display element.