JP2657168B2 - Magnetic reversal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic inversion display device capable of performing a desired display by inverting a display plate by an electromagnet device.

[0002]

2. Description of the Related Art A permanent magnet is provided at both ends of a display plate which is reversibly supported by a support case, and a magnetic attraction / repulsion force is applied to the permanent magnet to invert the display plate to reverse the display. Devices are known (for example, Japanese Patent Application Laid-Open No. 56-62).
No. 287, JP-B-63-35987, JP-B 3-39
No. 316). A plurality of the magnetic reversal display devices are arranged side by side to display characters and symbols.

In such a conventional magnetic reversal display device, the display plate is reversibly supported by a support case at both ends of the display plate via intermediate members such as a rotating shaft and a support pin. Generally, the intermediate member has the same shape on both the left and right sides, that is, it is generally symmetrical. Also,
The permanent magnets provided at both ends of the display panel have one magnetic pole line and the other magnetic pole line symmetrical with each other. When two permanent magnets face each other, the inclination of the magnetic pole line Are generally magnetized so as to match.

[0004]

In the conventional magnetic reversal display device, since the intermediate member for reversibly supporting the display plate on the support case is symmetrical, the display plate can be moved left and right with respect to the support case. There is a risk of mounting it upside down.
When the display board is installed with the left and right reversed with respect to the support case,
Since the inclinations of the magnetic pole lines of the permanent magnets provided at both ends of the display panel are reversed, there is a problem that a desired reversal operation cannot be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic inversion display device which can prevent a display plate from being mounted left and right inverted and can obtain a desired reversal operation with a simple configuration at a low cost.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a display panel which is supported reversibly and has different colors on the front and rear surfaces, and a display panel provided at both ends of the display panel. A first and a second permanent magnet, a rotating shaft provided outside each of the two permanent magnets, and the two permanent magnets at positions opposed to the two permanent magnets to magnetically act on the two permanent magnets to cause the display panel to move. In the magnetic reversal display device including the electromagnet device for reversing, the two rotating shafts are different from each other in the diameter of their shaft portions.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a flat display panel 1 made of a non-magnetic material such as aluminum or plastic is formed in a substantially octagonal flat shape. A pair of protrusions 1b, 1b having 1a, 1a are integrally formed. The display panel 1 has its front surface 1c colored in a bright color such as a fluorescent color and its back surface 1d in a dark color that does not reflect light.

Each of the projecting pieces 1b, 1b of the display panel 1 has first and second circular permanent magnets 2, 3 which rotate together with the display panel 1, and the display panel 1 which rotates together with the display panel 1.
The first and second rotation support shafts 4 and 5 for reversibly supporting a support case to be described later are engaged with each other.

As shown in FIGS. 1 and 2, the first and second circular permanent magnets 2 and 3 are plastic magnets formed by blending plastic and magnet powder and have a substantially cylindrical shape. The surface is magnetized into two poles, an N pole and an S pole. Hereinafter, the straight lines connecting the N pole and the S pole will be referred to as magnetic pole center lines 21 and 31, respectively.

The magnetic pole center line 21 of the first circular permanent magnet 2
And the magnetic pole center line 31 of the second circular permanent magnet 3 have a symmetrical relationship with each other, and as shown in FIG.
When the circular permanent magnets 2 and 3 are opposed to each other, they are magnetized so that the inclinations of the magnetic pole center lines 21 and 31 coincide with each other.

The circular permanent magnets 2, 3 are provided with mounting holes 2a, 3a (upper side) at portions deviated from the center in the axial direction (downward in FIG. 2) so as to form a substantially T-shape when viewed from the opposing surface side. ) And mounting holes 2b, 3b (lower side) are provided continuously.
The display panel 1 is provided on the side of the mounting holes 2a, 3a, and the mounting holes 2b, 3b.
Rotation support shafts 4 and 5 are respectively attached to the sides. At the upper side of the inner walls of the mounting holes 2a, 3a of the circular permanent magnets 2, 3, an engaging hole 1a protruding in a direction orthogonal to the plate surface of the display panel 1 and formed on the projecting pieces 1b, 1b of the display panel 1. , 1a are formed with engaging projections 2c, 3c. At the lower side of the inner wall of the mounting holes 2b, 3b of the circular permanent magnets 2, 3 are formed engagement recesses 2d, 3d with which the tips of the snap pieces 4b, 5b of the rotating shafts 4, 5 engage.

As shown in FIGS. 1 and 3, inside the first and second rotating shafts 4 and 5, holding pieces 4a and 5a and snap pieces 4b and 5b are formed in a bifurcated manner at intervals. It is. As described above, the two members 4a, 4b and 5a, 5b are formed in a bifurcated shape with an interval therebetween, thereby providing a spring property (flexibility) therebetween.

Outside the rotary support shafts 4 and 5, there are formed cylindrical shaft portions 4c and 5c which engage with support holes 6c and 6d formed in a support case 6 described later. Here, the outer diameters of the shaft portions 4c and 5c of the first and second rotary support shafts 4 and 5 are different from each other. In this embodiment, the outer diameter of the shaft portion 4c is equal to the outer diameter of the shaft portion 5c. It is twice as large. Shafts 4c, 5c
Are provided with circular flanges 4d, 5a which come into contact with the inner surfaces of support arms 6a, 6b standing upright from a support case 6, which will be described later.
d is formed.

When the engagement hole 1a and the engagement protrusion 2c (3c) are engaged (the state shown in FIG. 2), the mounting hole 2b (3
When the rotary support shaft 4 (5) is inserted from the outside of b), the pressing piece 4a (5a) and the snap piece 4b (5b) enter the inside of the mounting hole 2b (3b) while bending inward each other. . The pressing piece 4a (5a) of the rotary support shaft 4 (5) is
Of the snap pieces 4b (5b) and the engagement recesses 2d (3d) of the circular permanent magnet 2 (3), while contacting the back surface 1d and the lower surface of the engagement projection 2c (3c). , The engagement hole 1a of the display panel 1 and the circular permanent magnets 2, 3
Is held undetachable (FIG. 3).

When the display panel 1 is to be removed from the circular permanent magnet 2 (3), the snap pieces 4b (5)
b) is lifted to disengage the engagement with the engagement recesses 2d (3d), and the rotary support shaft 4 (5) is pulled out from the circular permanent magnet 2 (3) to the engagement hole 1a of the display plate 1. The engagement with the circular permanent magnets 2 and 3 can be released, and the circular permanent magnet 2
The display panel 1 can be removed from (3).

With such a configuration, the display panel 1, the permanent magnets 2, 3 and the rotary support shafts 4, 5 can be easily assembled and disassembled without being connected to each other by bonding or press-fitting.

As shown in FIGS. 4 and 5, support arms 6a and 6b are provided upright at predetermined intervals on a support case 6 composed of an upper case 61 and a lower case 62. 6b are provided with circular support holes 6c and 6d. Here, the support holes 6c and 6d are the first and second support holes.
Correspond to the shaft portions 4c and 5c of the rotary support shafts 4 and 5, respectively. That is, the inner diameter a of the support hole 6c is twice as large as the inner diameter b of the support hole 6d.

As shown in FIG. 4, the support holes 6c and 6d have
By inserting the shaft portions 4c and 5c of the rotary support shafts 4 and 5, one unit of the magnetic reversal display device shown in FIG. 5 is completed.

As described above, since the outer diameters of the shaft portions 4c and 5c of the first and second rotary support shafts 4 and 5 are different, the large-diameter shaft portion 4c is connected to the small-diameter support hole 6d. Cannot be inserted. Therefore, it is not possible to mount the rotation support shafts 4 and 5 in the support holes 6c and 6d with the right and left reversed, and there is no possibility of mounting the display plate 1 in the support case 6 with the left and right reversed.

An electromagnet device 7 is built in the support case 6, and its configuration will be described. As shown in FIG. 5, the yokes 8, 8 stand upright so that their upper ends face the circular permanent magnets 2, 3 at a predetermined interval.
The lower ends of the yokes 8, 8 are press-fitted and fixed to a coil core 9 in the support case 6, and a coil 11 is wound around the coil core 9 via a coil bobbin 10. The device 7 is constituted.

As shown in FIGS.
A stopper piece 6e for maintaining the display state of the display panel 1 is provided in the vicinity of b. A first locking portion that locks the display panel 1 such that the display surface (surface 1c) is perpendicular to the viewing direction while the surface 1c of the display panel 1 is displayed on the stopper piece 6e. The display plate 1 is locked in a state in which the display surface (back surface 1d) is displaced from the direction perpendicular to the viewing direction by a certain angle in a state where the portion 6f and the display plate 1 are inverted and the back surface 1d is displayed. A second locking portion 6g is formed. These first and second locking portions 6f, 6g
Has a function of preventing hunting of the display panel 1 at each inversion drive of the display panel 1.

By the way, in the prior art, as described above, the display panel may be stopped while floating from the stopper piece. As shown in FIGS. 1 and 8 to 10, a pair of convex portions 2 are respectively provided on the outer circumference of the circular permanent magnets 2 and 3.
e, 2e and 3e, 3e are projected.

The projections 2e, 2e and 3e, 3e are shown in FIG.
As shown in FIG. 5, the circular permanent magnets 2 and 3 have the same length as the axial thickness of the circular permanent magnets 2 and 3 and are symmetrical with respect to the center of the circular permanent magnets 2 and 3. , 3 are provided at positions corresponding to the magnetic poles (N pole, S pole). The straight lines (magnetic pole center lines 21, 31) connecting the convex portions 2e, 2e and 3e, 3e deviate by an angle d with respect to a line orthogonal to the plate surface of the display panel 1 attached to the circular permanent magnets 2, 3. ing.

By forming a pair of projections 2e, 2e and 3e, 3e on the outer periphery in this way, as shown in FIG. 10, the distance between the tip of the yoke 7 and the outer peripheral surfaces of the circular permanent magnets 2, 3 is increased. The distance f between the tip of the yoke 8 and the projections 2e, 3e becomes smaller than the distance e, and the magnetic attraction force is inversely proportional to the square of the distance. Therefore, the state shown in FIGS. In the state where the front surface 1c is displayed), a clockwise (clockwise) rotational force acts on the circular permanent magnet 3 in FIGS. As a result, as shown in FIG.
The back surface 1d of the display panel 1 integrated with (3) is
Of the display panel 1 is securely brought into contact with the first locking portion 6f.
With c displayed, the display surface (front surface 1c) is surely perpendicular to the viewing direction.

As shown in FIG. 9, the tip of the yoke 8 and the circular permanent magnets 2,
3, the tip of the yoke 8 and the protrusion 2
e and 3e are smaller, and the magnetic attraction force is inversely proportional to the distance.
Is displayed), a counterclockwise (counterclockwise) rotational force acts on the circular permanent magnet 3. as a result,
As shown in FIG. 9, the back surface 1d of the display plate 1 integrated with the circular permanent magnet 2 (3) is connected to the second locking portion 6g of the stopper piece 6e.
Abut securely.

The shape of the pair of projections 2e, 3e formed on the outer periphery of the circular permanent magnets 2, 3 is not limited to the shape shown in FIG. And a straight line connecting the convex portions 2e, 2e and 3e, 3e is deviated by a predetermined angle with respect to a line orthogonal to the display surface of the display plate 1 attached to the circular permanent magnets 2, 3. Any condition may be used as long as it satisfies the condition described above, and as shown in FIG. 11, the circular permanent magnets 2 and 3 may have a length shorter than the axial thickness.

FIG. 12 shows another embodiment, in which a shaft 41c (51c) having a concave shape is provided instead of the shaft 4c (5c) of the rotary support shaft 4 (5) shown in FIG. Instead of the support holes 6c (6d) of the support arms 6a (6b) of the support case 6, a support shaft 61c (61d) having a convex shape is provided. Other configurations are substantially the same as those of the first embodiment. In this case, the concave shaft portions 41c and 51c
And the inner diameter of the rotary shaft 4
It is possible to prevent the left and right parts 1, 51 from being mounted left and right.

FIG. 13 shows still another embodiment, in which an engaging projection 101a is provided instead of the engaging hole 1a of the display plate 1 shown in FIG. An engagement hole 21c (31c) is provided instead of the engagement protrusion 2c (3c). Other configurations are substantially the same as those of the first embodiment. In this case, the holding piece 4 of the rotary support shaft 4 (5)
a (5a) comes into contact with the back surface 101d of the display panel 101, and the distal end of the snap piece 4b (5b) engages with the engaging concave portion 21d (31d) of the circular permanent magnet 21 (31). The engagement between the engaging projection 101a of the base 101 and the circular permanent magnet 21 (31) is held so as not to be disengaged.

FIG. 14 shows still another embodiment, in which the mounting hole 2 for the circular permanent magnet 2 (3) shown in FIGS.
The mounting hole 21b (31b) whose lower surface is flattened by omitting the engaging concave portion 2d (3d) of b (3b)
And the snap piece 42 of the rotating shaft 42 (52).
b (52b) is longer than the thickness of the circular permanent magnet 22 (32). Other configurations are substantially the same as those of the first embodiment. In this case, the mounting holes 21b (31
The tip of the snap piece 42b (52b) of the rotation support shaft 42 (52) mounted from the outside of b) is attached to the mounting hole 21b (31).
b) and protrudes inward through the circular permanent magnet 22 (3).
The display plate 1 and the circular permanent magnets 22 (32) can be held undetachably by engaging with the inner wall surface of 2).

Although not shown, the circular permanent magnet 2
The mounting holes 2a (3a) and the mounting holes 2b (3b) connected to (3) need not be formed in a substantially T-shape as viewed from the side, but may be formed with the same width.

[0032]

As described above, according to the present invention,
Since the diameters of the shaft portions of the rotating shafts located at both ends of the display plate are different from each other, it is possible to prevent the display plate from being mounted left and right reversed, so that a desired reversing operation can be obtained. A possible magnetic reversal display device can be provided at a low cost with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing attachment of a display plate, a permanent magnet, and a rotating spindle.

FIG. 2 is an enlarged sectional view of a main part showing attachment of a display plate and a permanent magnet.

FIG. 3 is an enlarged sectional view of a main part showing attachment of a permanent magnet and a rotating shaft.

FIG. 4 is a perspective view showing attachment of the display panel to a support case.

FIG. 5 is a sectional view of a magnetic reversal display device.

FIG. 6 is an essential part cross-sectional view showing a display state when a permanent magnet without a convex portion is used.

FIG. 7 is an enlarged view of FIG. 6;

FIG. 8 is an essential part cross-sectional view showing a display state when a permanent magnet having a convex portion is used.

FIG. 9 is a cross-sectional view of a main part showing another display state when a permanent magnet having a convex portion is used.

FIG. 10 is an enlarged view of FIG. 8;

FIG. 11 is a perspective view showing another embodiment of the permanent magnet.

FIG. 12 is an enlarged sectional view of a main part showing another embodiment of the rotating shaft.

FIG. 13 is an enlarged sectional view of a main part showing another embodiment of the display plate and the permanent magnet.

FIG. 14 is an enlarged sectional view of a main part showing another embodiment of a rotating shaft and a permanent magnet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display board 1c Front surface 1d Back surface 2, 3 Permanent magnet 4, 5 Rotation support shaft 4c, 5c Shaft part 7 Electromagnet device

Claims (1)

(57) [Claims] 1. A display plate which is supported reversibly and has different colors on the front and rear surfaces, first and second permanent magnets provided at both ends of the display plate, and outside the two permanent magnets. A magnetic reversing display device comprising: a rotating shaft provided respectively; and an electromagnet device for reversing the display plate by magnetically acting on the two permanent magnets at positions opposed to the two permanent magnets, respectively. A magnetic reversal display device, wherein the support shafts have different diameters of shaft portions.