JPH0412472B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a display element used in a segment type display device.

[Background technology]

As shown in FIG.
Segment type display devices have been proposed that display various numbers and characters depending on the combination of a'. The display board 4' is reversible and has a display section 4a' only on its surface.

The display element 1 is of an inversion drive type driven by an electromagnet, and is constructed as shown in FIGS. 1 and 2. A pair of opposing corners of the display plate 4' are supported by bearings 3d' provided on the coil bobbin 3', and an open end 10b' of the stator 10' is supported by the bearings 3d' of the display plate 4'.
It faces near the support by d'. 8' is a coil. There is a magnet 1 at the center of rotation on the display board 4'.
3' is embedded. Therefore, the stator 10' and the magnet 13' repel each other or attract each other,
The display panel 4' is driven in reverse. However, since the reversing torque is small, it is difficult to obtain reliable operation, and increasing the reversing torque results in a problem in that the power consumption of the coil 8' increases.

[Purpose of the invention]

An object of the present invention is to provide a display element that can increase the reversal torque of a display panel without increasing power consumption.

[Disclosure of the invention]

In the display element of this invention, the position of the magnet attached to the display plate is slightly shifted from the center of rotation.

Embodiment An embodiment of the present invention is shown in FIGS. 3 to 7. This display element consists of a box-shaped main body case 2 with an open top surface, a coil block A housed diagonally within this main body case 2, and a main body case 2.
It has a display board 4 whose top opening is closed. The coil block A and the coil bobbin 3 are each provided with a pair of opposing pieces 3b whose base end portions serve as flanges at both ends of a cylindrical portion 3a, and a bearing hole 5 is formed at the tip of the opposing pieces 3b. An elastic locking piece 6 is integrally provided on the outer surface of the proximal end of the opposing piece 3b, and a terminal fitting 7 is attached thereto. The terminal fitting 7 is connected to a coil winding 8 wound around the cylindrical portion 3a. The terminal fitting 7 protrudes from a hole in the bottom wall of the main body case 2 to the outside. The elastic locking piece 6 is attached to the main body case 2
The coil bobbin 3 is engaged with an engagement hole 9 provided at the bottom of the side wall to prevent the coil bobbin 3 from coming off.

The horizontal pieces of a pair of L-shaped stators 10 are fitted into the cylindrical portion 3a of the coil bobbin 3 from both ends in an overlapping state. The vertical piece portion of the L-shaped stator 10 extends along the outer surface of the opposing piece 3b of the coil bobbin 3, and its tip is located near the bearing hole 5. This tip is a positioning groove 21 provided at the tip of the outer surface of the opposing piece 3b.
to be inserted into. Further, an L-shaped stator 10 is provided on the outer surface of the opposing piece 3b with the opposing piece 3b bent outward.
An escape groove 11 (FIG. 7) is formed into which the vertical piece fits loosely. The relief groove 11 gradually becomes deeper toward the distal end side of the facing piece 3b. The vertical part of the L-shaped stator 10 has a stepped part 10a in the middle, and the upper part and the lower part thereof are shifted by 1/2 in thickness. As a result, the horizontal piece portions of both L-shaped stators 10 are overlapped with each other, and the thickness centers of the tips of the vertical piece portions of both L-shaped stators 10 are made to coincide with the bearing hole 5.

The display plate 5 is formed into a diamond shape that fits loosely into the upper opening of the main body case 2, and is reversibly supported in the bearing hole 5 of the coil bobbin 3 by a support shaft 12 protruding from a diagonal. The display board 4 has a display part (not shown) of white color or the like similar to the example of FIG. 1 on a part of the surface,
The other parts of the front and the back are painted black. The display section is provided by printing or pasting a separate member. A magnet 13 corresponding to the end of the stator 10 is embedded in the corner of the display plate 4 on the bearing hole 5 side. The entire magnet 13 is slightly shifted from the center of rotation of the display board 4. Further, the magnets 13 on both sides of the display board 4 are attached with polarities opposite to each other. A stopper portion 14 (FIG. 7) is provided at the tip of the opposing piece 3b of the coil bobbin 3 to restrict the rotation angle of the display panel 4 to a range of 180°.

Operation In steady state, that is, in non-energized state, two magnets 1
3 respectively attract the stator 10 and maintain a stable state. When the display panel 4 is turned face up and the white display section 4a appears, the N pole of the magnet 13 on the right side in FIG. 3 faces the stator 11, and the S pole of the magnet 13 on the left side faces the stator 11. When a current is passed through the coil 8 in the forward direction, the open end 10b on the right side of the stator 10 in FIG. 3 becomes the north pole, and the open end 10c on the left side becomes the south pole. Therefore, the N poles on the right side repel each other, and the S poles on the left side repel each other, causing the display board 4 to be reversed by 180 degrees. When reversed, the north pole of the magnet 13 faces the stator 10 on the right side and attracts the south pole of the stator 10. Since the display board 4 remains stationary, even if the current is cut off afterwards, the magnet 13
The stator 10 continues suction and maintains the black display state. In this state, when a current is applied to the coil 8 in the opposite direction, the display is reversed by 180 degrees and the display becomes black, and the black display state is maintained even when the current is turned off.

Although it operates in this manner, the torque T for reversing the display board 4 is determined by the repulsive force F and the distance l between the point of application of the repulsive force.
Therefore, T=F×l. Here, since the magnet 13 is shifted from the center of rotation of the display board 4, l is larger than the conventional example shown in FIG.
Even if the repulsive force F is the same, the rotational torque can be increased. Therefore, without increasing power consumption,
Rotational torque can be increased.

Furthermore, this display element has the following advantages. First, since the bearing hole 5 is provided in a part of the coil bobbin 3, when the stator 10 is press-fitted into the coil bobbin 3, the magnet 13 of the display board 4 and the stator 1
The variation in the distance from the tip of zero is reduced, and the characteristics are stabilized. When assembling, L-shaped stator 1
0, and this L-shaped stator 10 is press-fitted from both sides of the coil bobbin 3, unlike the conventional case where the iron core inserted into the coil bobbin and the stator for opposing the magnet are provided separately, there is no joining. No work required and easy to assemble. Moreover, the number of parts is reduced. Furthermore, since the L-shaped stator 10 is used, the left and right parts can be the same, reducing the number of parts types. Therefore, there is no possibility of mis-assembly. The two L-shaped stators 10 are stacked one on top of the other, and since the stepped portion 10a is provided, even if the left and right sides are the same, the thickness centers of their tips can be made to coincide. When inserting the support shaft 12 of the display plate 4 into the bearing hole 5 of the coil bobbin 3,
It is necessary to bend the opposing piece 3b outward, but since the relief groove 11 is formed in the opposing piece 3b, even if the L-shaped stator 10 is installed first, the opposing piece 3b can be bent only by the depth of the relief groove 11. It can be bent. Therefore, the display board 4 can be easily attached.

8 to 11 show other embodiments. In this example, the display board 4 is formed of a black display board main body 41 and a white display member 43 that continues to the display board main body 41 via a plastic hinge 42. These display board main body 41 and display part member 42
It is integrally molded using two-color molding. The display board main body 41 has a display member fitting recess 44 on its surface, and the display member 42 has a height adjustment rib 45. Two grooves 46 are formed in the plastic hinge 43.

When configured in this way, the number of parts is reduced and orientation during assembly is easier than when the display board main body 41 and the display member 43 are formed separately and fitted into each other. plastic hinge 42
By bending, the display member 43 can be easily positioned and fitted. The rest is the same as the first embodiment.

〔Effect of the invention〕

The display element of the present invention has the effect of increasing the reversing torque of the display board without increasing power consumption.

[Brief explanation of drawings]

FIG. 1 is a plan view of a proposed example of a segment type display device, FIG. 2 is a side view of its display element, FIG. 3 is a longitudinal sectional front view of an embodiment of the present invention, and FIG. 4 is a longitudinal sectional side view thereof. FIG. 5 is a plan view of the same, FIG. 6 is a side view of the main body with the case removed, FIG. 7 is a partially exploded perspective view of the same, and FIG. 8 is a perspective view of a display board of another embodiment. , FIG. 9 is a perspective view of the display panel in its open state, and FIGS. 10 and 11 are a sectional view and a perspective view of the plastic hinge of the display panel, respectively. 2...Body case, 3...Coil bobbin, 4...
...Indication board, 5...Bearing hole, 8...Coil winding, 1
0... L-shaped stator, 10b, 10c... Open end, 12... Support shaft, 13... Magnet, A... Coil block.

Claims (1)

[Scope of Claims] 1. A display board that is reversibly supported by bearings at a pair of opposing edges, and a coil that has a stator with both open ends facing each other at a location near the bearings at the center of rotation of the display board. A display element comprising: a block; and a pair of magnets mounted at positions substantially corresponding to both open ends of the stator of the display board, with the entire structure slightly shifted from the center of rotation. 2. A patent in which the display board comprises a display board main body having a display member fitting groove, and a display member integrally molded with the display board main body via a plastic hinge and fitted into the display member fitting groove. A display element according to claim 1.