JPS64705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic reversal display in which display plates arranged in a Japanese character shape are moved by magnetism.

As such a display device, a permanent magnet is attached to a rotatable display board, this permanent magnet is placed between the iron cores of the coil, and by changing the magnetic polarity of the iron core, the display board is reversed via the permanent magnet, and the same display is displayed. There are devices that display numbers, etc. by arranging the display surface of the board.

The display board of such a display device has a combination arrangement of 0 to 9 with the display surface on the front side facing out and the display side facing the back side.
It displays numbers up to.

Therefore, the display board rotates at an appropriate angle and repeats reversal, but if the reversal speed is increased to increase the response speed, there is a drawback that when reversing, the display board strongly hits the stopper and bounces back to its original position.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic reversal display which eliminates the above-mentioned disadvantages and can prevent the display board from bouncing off the stopper during reversal without reducing the reversal response speed of the display board.

However, according to the present invention, the purpose of the lever is to consist of a rotatable display board to which a permanent magnet is attached and an electromagnetic field provided close to the permanent magnet, and magnetic reversal that rotates the display board by changing the polarity of the electromagnet. This is achieved in the display by providing an anti-rebound member close to the display board that has protruding portions that contact the display board at both ends and reacts with the display board.

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

Fig. 1 is a front view of the display device of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an enlarged view of the display board portion in Fig. 1, and Fig. 4 is a main part. In the exploded perspective view, a base 1 is made of black synthetic resin and integrally protrudes with legs 2 having bis pockets on the back, and a Japanese character-shaped display board storage recess 3 is formed by bulging toward the back. .

An arm 20 having slotted shaft bearing parts 4, 4' is integrally formed in this storage recess 3, and through holes 5, 5' are provided in the vicinity thereof. In addition, 6 in the figure,
Reference numeral 6' denotes a stopper integrally formed with the arm 20 for regulating the position of the display plate 7.

On the other hand, the front side of the display board 7 made of a rectangular flat plate made of synthetic resin is made red and the back side is made black. Bearing parts 8, 8' are provided protruding from the black back side, and a clamping part 10 for the permanent magnet 9 is provided on the outside of the bearing part 8. , 10' are provided protrudingly, and the holding parts 10,
A permanent magnet 9 is inserted between 10' and fixed by the spring effect of 10 and 10'.

At this time, the holding parts 10 and 10' are formed to have different lengths, and the permanent magnet 9 is fixed to the back surface of the display board 7 in an oblique manner.

A rebound prevention member 12 is arranged on the bearings 8 and 8' of the display board 7, and a shaft 11 is rotatably inserted therein, and this shaft 11 is clamped and fixed to the shaft bearings 4 and 4' of the base 1. be done.

As shown in the enlarged cross-sectional view of FIG. 5, the anti-rebound member 12 has its end 12a close to the display board 7 with some gap left. In the illustrated example, the prevention member 12 is formed into a W-shape and is made of a synthetic resin body with a through hole 12b for the shaft 11 provided at the top of the central chevron, but the shape is not necessarily limited to the W-shape illustrated. .

A coil 13 is formed by winding an electric wire around a bobbin 15, which has locking protrusions 14, 14' protruding from the bottom for attachment, and the short leg of the U-shaped iron core 16 is inserted into a through hole 15a provided at the center of the bobbin 15. to form an electromagnet.

Both ends of the iron core 16 are inserted into the through holes 5 and 5' of the base 1 from the back side of the base 1, and both ends of the iron core 16 are brought close to the permanent magnet 9 attached to the display board 7.

In this case, as shown in the longitudinal sectional front view of the display panel drive mechanism in FIG.
, and the other pole (in the figure, the S pole) is located below the longer leg.

Inserting the locking protrusions 14, 14' protruding from the bobbin 15 into the through holes 17a provided on the mounting board 17,
Using the protrusions of the protrusions 14 and 14', the coil 13
An electromagnet consisting of an iron core 16 and an iron core 16 is fixed to the mounting board 17, and the base 5 is also fixed to the board 17 via this electromagnet and by inserting screws 21 into the screw pockets of the legs 6. A wiring board 18 on which an electrical wiring mechanism is provided is separately attached to the board 17.

Next, the operation will be explained. As shown in FIG. 6, when the coil 13 is energized, a magnetic field as shown by the arrows is generated from both poles of the iron core 16.

Now, if we excite the U-shaped iron core 16 so that the shorter pole becomes the N pole and the longer pole becomes the S pole, the poles of the permanent magnets 9 that are close to each of the two poles are the same, so they repel and rotate. The display panel 7 is also inverted to expose the black color on the back surface and hide the fluorescent red display surface.

The rotation of this permanent magnet is caused by the coil 13 of the iron core 16.
The lines of magnetic force coming out from the pole on the side where the permanent magnet 9 is attached
Since the permanent magnet 9 is activated in a state that is almost perpendicular to the line connecting both ends of the magnet, the force applied to the permanent magnet 9 acts in the direction where the rotational moment is greatest, and the energy given to the electromagnet is used most effectively to reverse the display board 7. It can be converted into power.

Furthermore, since the poles of the permanent magnet 9 rotate along the direction of the lines of magnetic force through almost the entire rotation, a large rotational moment can be obtained.

If the direction of current to the coil 13 is reversed with the display board 7 inverted, the polarity of the iron core 16 will be switched, and the permanent magnet 9 and the display board 7 will rotate in the opposite direction to the above and return to the original display position. Return to

In this way, the display board 7 rotates about the shaft 11 fixed to the shaft support parts 4, 4' of the base 1, and the rotation is stopped at the proper position by the stoppers 6, 6', but the rebound prevention member 12 also rotates with respect to the shaft 11, and this movement of the preventing member 12 with a slight deviation from the display board 7 can suppress the display board 7 from rebounding at the stoppers 6, 6'.

To explain the movement in more detail with reference to FIGS. 7 to 10, first, when the coil 13 is energized and the iron core 16 is excited, the display plate 7 starts rotating via the permanent magnet 9, and one end of the anti-rebound member 12 12a is pushed by the display board 7 and rotates (FIG. 7).

At this time, the average speed of both is ν, which is the same.

Then, at the end of forward rotation, the display plate 7 is moved to the stopper 6 integrally formed with the shaft support parts 4, 4'.
It collides with a velocity of V ₀ A and bounces back with a velocity of -eV ₀ A (Figure 8).

On the other hand, the prevention member 12 continues to rotate in the same direction at a speed of V ^B =V ₀ A, and immediately after this, the rotation directions of the two become opposite to each other, so that a collision immediately occurs.

Since the moment of inertia of the prevention member 12 is smaller than that of the display board 7, the display board 7 decelerates, and the prevention member 12 begins to rotate in the opposite direction to that before the collision (FIG. 9). At this time, the rotation direction of the prevention member 12 and the display plate 7 is the same.

Since the rotational speed of the prevention member 12 is higher than that of the display board 7, the prevention member 12 immediately collides with the display board 7, accelerates the display board 7, and starts rotating in the opposite direction (FIG. 10).

In this way, the display board 7 and the rebound prevention member 1
2 repeatedly collides with the display board 7 due to the time-shifted movements, and the display board 7 is prevented from bouncing against the stoppers 6, 6' and brought to a stop.

By inserting this prevention member 12, the display board 7 after rebounding against the stoppers 6, 6'
The average speed can be significantly reduced compared to when the prevention member 12 is not included.

In this way, the seven display boards 7 arranged in a "Japanese" shape in the recess 3 of the base 1 are reversed as described above, and the combination of one with the red display surface facing and the other with the black back face facing. It displays numbers from 0 to 9.

Next, FIG. 11 is a front view showing another embodiment of the above-mentioned rebound prevention member 12. Unlike the above-mentioned embodiment, the prevention member 12' has a slot-shaped attachment part 12'c in the center, It is mounted so that it can rotate with some degree of friction with respect to the shaft 11.

Further, this prevention member 12' is configured in such a shape that one end thereof is located at a location far away from the display board 7 compared to the prevention member 12 described above.
It doesn't look like a part of 2 has been cut out.

Next, the operation will be described. As shown in FIG. 12, when the display board 7 rotates in the direction of the arrow and is about to hit the stopper 6, one end of the prevention member 12' protrudes beyond the stopper 6, and the display board first hits the prevention member 12' and hits the stopper 6 while pushing it out.

Then the display plate 7 is turned over and the other stopper 6'
13, the other end of the prevention member 12' projects beyond the stopper 6', and the display plate 7 hits the prevention member 12' before hitting the stopper 6', preventing it from hitting the stopper 6'. Push out.

In this way, the preventing member 12' constantly protrudes from the stoppers 6, 6' when the display board 7 hits the stoppers 6, 6' and is reversed, so that the display board 7
It works by absorbing the energy during the reversal in advance through friction.

In yet another embodiment, the anti-rebound member 12' may be rotatably provided not on the shaft 11 but on the side of the shaft support portions 4, 4' where the stoppers 6, 6' are located.

As described above, the magnetic reversal display of the present invention has
In a magnetic reversal display, which is composed of a rotatable display board equipped with a permanent magnet and an electromagnet installed close to the permanent magnet, the display board is rotated by changing the polarity of the electromagnet. By protruding the abutting part and providing a bounce prevention member close to the display board that responds to the display board, it is possible to prevent the display board from bouncing off the stopper without reducing the reversal response speed of the display board, and to maintain the display board properly. It is designed so that it can be secured in position.

[Brief explanation of drawings]

Fig. 1 is a front view of the magnetic reversal display of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an enlarged view of the display panel, and Fig. 4 is an exploded perspective view of the main parts. Figure, 5th
The figure is an enlarged sectional view of the part where the anti-rebound member is attached, FIG. 6 is a longitudinal sectional front view of the display board drive mechanism, and FIGS. 7 to 10 are cross-sectional views showing the operation of the anti-rebound member.
FIG. 11 is a front view showing another embodiment of the rebound prevention member, and FIGS. 12 and 13 are sectional views showing the operation of the above-mentioned prevention member. 1...Base, 2...Legs, 3...Recess, 4, 4'
...Shaft support part, 5,5'...Through hole, 6,6'...
Stopper, 7... Display plate, 8, 8'... Bearing part,
9... Permanent magnet, 10, 10'... Clamping part, 11
...Shaft, 12, 12'...Rebound prevention member, 1
2a... end, 12b... through hole, 12'c...
Mounting part, 13... Coil, 14, 14'... Locking protrusion, 15... Bobbin, 15a... Through hole, 16
... Iron core, 17 ... Mounting board, 17a ... Through hole, 18 ... Wiring board, 21 ... Screw.

Claims (1)

[Claims] 1 Consists of a rotatable display board with a permanent magnet attached and an electromagnet installed close to the permanent magnet,
A magnetic reversal display in which a display board is rotated by changing the polarity of an electromagnet, characterized in that a rebound prevention member is provided in close proximity to the display board, with protruding portions that contact the display board at both ends and reacting with the display board. Magnetic reversal display.