JPS582669A - Magnetic inversion indication element - Google Patents

Abstract

PURPOSE:To ensure a fast action with an increase in the driving torque without increasing the size and the weight of an element as a whole by arranging a driving coil on a ball piece at either end of a yoke of an electromagnet device. CONSTITUTION:An electromagnet device 300 comprises ball piece 320 and 330 mounted at each of both ends of a yoke 310, a driving coil 340 wound on the ball piece 320 and a driving coil 350 wound on the ball piece 330. The driving coils 340 and 350 are divided into two sections 341, 342 and 351, 352 respectively. As clearly shown by a comparison between a curve A and a curve B respectively indicating a relationship in the existing art and the enbodyment, the energization level of the ball pieces goes higher in the embodyment of the present invertion when the ampereturn is the same. This enables a fast action with an increase in the driving torque without increasing the size and the weight of an element as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION Since the display element is driven to display a desired display, the present invention also relates to an air flow display element.

In general, the characteristics that this type of magnetic reversal display element must have are that the display is easy to see;
Its essential components are to be as small as possible relative to the display area, and its electrical and magnetic properties include a small drive current for driving the electromagnetic device, a small drive current time, and a self-holding property. In addition, it is less susceptible to the influence of external magnetic fields.

A conventional example of this type of magnetic reversal display element is schematically shown in FIG. 1 of the accompanying drawings. This conventional magnetic reversal display element has a display member having circular permanent magnets 12 and 13 on both sides and is supported so as to be reversible.
It is growing. The electromagnetic device for inverting this display member is provided with a recessed IIIK moving coil 1T having Dale beads 14 and 1s connected to both ends in an upright manner. Conventionally, the drive coils 17t are grouped together for ease of manufacture and for the purpose of arranging only the display member at the top of the case 18 so that other members are not visible on the case as much as possible so that the display is easy to see. The adventure 1.
Generally, the wire is wound around the wire and placed inside the case 18 so as to be hung.

However, in a magnetic reversal display element for displaying a large portion of the display, the display area becomes large and the weight of the display member becomes large. Furthermore, the driving current pulse time had to be increased. Otherwise, problems tend to arise in which the display member may not be reversed or, in the worst case, the display member may not be reversed. On the other hand, if the drive current pulse time is made longer, the responsiveness to the external drive signal deteriorates, resulting in the inconvenience that it becomes impossible to follow a high-speed face thread signal of, for example, 5 oo-v microseconds or less.

In order to resolve this problem, it may be possible to increase the number of turns of the coil of the electromagnet device, but in the conventional structure shown in Figure 1, the drive coil is placed around a yoke with a relatively large cross section. Since the drive coil is wound, an increase in the number of turns by 1 increases the outer diameter of the drive coil, and in order to accommodate this inside the case 11, the distance between the yoke 16 and the upper plate of the case 18 must be increased. Therefore, the length of the -1 piece 14 and 1s inevitably becomes long, and the overall height of this magnetic reversal element becomes high.Also, the length of the winding of the coil also increases accordingly ( As a result, the overall weight of the magnetic reversal element also increases, making it difficult to assemble.Furthermore, the longer lengths of the pieces 14 and 1S make the magnetic circuit longer and increase the magnetic loss, so the coil Despite increasing the number of ea,
In view of the above-mentioned problems, an object of the present invention is to avoid an increase in driving torque.
The object of the present invention is to provide a magnetic reversal table element that can increase the driving torque and operate at high speed without increasing the size or weight of the entire element. An object of the present invention is to provide a display element.

FIG. 1 of the accompanying drawings is a schematic diagram of a magnetic reversal display element for explaining the present invention in detail. The same parts as in Figure 1 are indicated by the same reference numbers as in Figure 1. According to the present invention, whereas in the past, the drive coil was wound around the yoke all at once and the magnetic flux generated by the coil was passed through the four pieces to magnetize the eleven pieces, the drive coil 17',
The I-piece is directly magnetized by dividing it into parts 17' and wrapping it around the rubles 14' and 15'. By winding the drive coil directly around the pole piece in this way, the distance between the yoke 16' and the case 18 can be shortened, and the lengths of the pole pieces 14' and 15' can be made shorter than they would otherwise be. can. Further, the magnetic flux generated by the drive coil can effectively magnetize the pole piece, and the magnetic circuit formed via the yoke can also effectively utilize leakage magnetic flux. From these, 4-rubys can be sufficiently magnetized with a small generated magnetic flux.

Generally, the driving torque by an electromagnetic device is the generated magnetic flux -
The generation a East is proportional to the following formula % formula % Where, φ...magnetic flux, Rm...magnetic resistance, l...
energizing current, - magnetic path length, μ... magnetic permeability, S - cross-sectional area, N - number of coil turns. As is clear from the above equation (1), if the I-piece can be shortened, the magnetic path As the length t becomes shorter, the magnetic resistance becomes smaller, and therefore the generated magnetic flux φ, that is, the driving torque increases. In addition, when generating the same magnetic flux (same driving torque), the biasing current value is small and stale.

The solder inductance of the coil is expressed by the following formula.

Conventionally, this method requires a large magnetic flux, and the above (1)
) It is clear that a yoke with a large magnetic permeability μ and a large cross-sectional area S was used to increase the generated magnetic flux.

However, according to the above equation (c), the inductance also becomes large.According to the present invention, the generated magnetic flux can be small, and the pole piece around which the coil is wound has a magnetic permeability μ and a cross-sectional area compared to the yoke. Since S is sufficiently small, the inductance can also be made small. Therefore, the rise of the drive signal waveform in the drive circuit is improved, and it is possible to follow a high-speed external drive signal, making high-speed operation possible.

Furthermore, when the drive coil is wound into four pieces according to the present invention, the cross section of one piece is generally smaller than the cross section of a single piece, so the winding length of the coil is shortened as a whole. The shorter length leads to weight reduction, and the reduction in winding resistance makes it possible to drive at a lower voltage.

Next, the present invention will be described in more detail regarding more specific embodiments of the present invention based on FIGS. 3 to 1O of the accompanying drawings.

FIG. 3 is a perspective view of an exploded parts arrangement showing a magnetic reversal display element as an embodiment of the present invention.

This magnetic reversal display element includes a display member 100, a bracket 200 that constitutes a part of the housing case, and six electromagnetic units [3].
0G and a terminal plate 400 that constitutes a part of the housing case.

The display member 100 includes a display disk 110, a first circular permanent stone 120, an irises circular permanent magnet 130, left and right slice plates 140, and left and right rotating shafts 150.

The display disk 110 is made of a lightweight and flat member, and its am and back surfaces are coated with colors that can be differentiated to form a °C display surface 111 and a display back surface 112. The display disk 110 of this embodiment is extremely thin and lightweight, and can be press-machined in one step for shaping the outer periphery and bending.
It is made of durable and corrosion-resistant Al2 material, but it is not limited to this, and it can be made of any material that is lightweight, has a certain degree of mechanical strength, and can be press-machined with a flat plate that can be easily machined. It may be made of any material; for example, a film-like plastic film is also a suitable material.

The colors on the display surface 111 and the display back surface 112 of the display disk 110 have been explained as if different colors were applied, but the present invention is not limited to this, and the front and back surfaces of the disk member,
Or, on either side, paper or vinyl 6 thin plates coated with an adhesive on the back and a colored fluorescent color or a reflective material on the surface are applied. The display disk may be formed by straining, post-pressing, and bending machining.

Next, the 1111 circular permanent magnet 120 and the first circular permanent magnet 13G are permanent magnets that are as light as possible and have a residual magnetic flux density of l [
(Sr) and coercive force (Hc) are both large (it is preferable to form using a material with a small demagnetization ratio).

In a preferred embodiment, these permanent magnets are made from a mixture of plastic and ferrite magnet powder, which can be molded into any external shape! Consists of lametic magnets. The first circular permanent stone 12G indicates the magnetic pole axis of the disk 1
The first circular permanent magnet 130 is attached by suitable means to one end of the display disk 110 so as to be perpendicular to the plane of the first circular permanent magnet 120 . It is attached by suitable means to the opposite end of the display disk 1110 in such a way that it is opposite and the magnetic pole axis is inclined at an angle with respect to the plane of the display disk 110. 1st circular permanent - stone 12G
and in the center of the first circular permanent-stone 130 there is a slice M1
Rotating shafts 150 each having a rotation shaft 40 inserted therein are scattered.

1) The racket 200 may be made of resin, and has a support bearing hole 211 for supporting the rotating shaft 150 at the opposite corner of the upper end.
A support plate 210 having a function as described below is integrally molded on one side of the upper end thereof. l! In the middle of the inside of 20G,
A blind plate 24o is provided, and a pair of compartments 250 are formed at opposite corners of the blind plate 240 to receive the molded pieces of the drive coil of the electromagnetic device 300, which will be described later.
An opening 251 is provided at the upper end of the paired compartment 250 to expose the upper end of the pole piece.

The electromagnetic device 300 includes /-rubies 320 and 33o attached to both ends of the recommendation 310, and the i-piece 320.
A drive coil 34o is wound around the pole piece 330, and a drive coil 350 is wound around the pole piece 330. Each drive coil 340 and 35o has two coil portions 341, 342 and 351.
, 352, each coil part 341.34
The lead wires drawn out from both ends of the 2,351.352 are designated by reference numerals a-h K'''C, respectively.

The yoke 310 as a magnetic path member satisfies the above relational expression (1).
If the number of turns of the coil and the energizing current R are constant at y-, it is preferable to use a material with high magnetic permeability, and it is also preferable to use a material with good punching workability.

In a preferred embodiment, the yoke 310 is made of a high magnetic permeability material commercially available under the tradename Permalloy (an iron, nickel alloy) and is stamped to have holes at both ends that can be fitted with 4-Rubys. Although permalloy is used in the embodiment, the slot may be formed of a material with relatively high magnetic permeability, such as pure iron or silicon iron, although the characteristics will deteriorate.

The pole peel 320 and the sso are designed to perform attraction and repulsion depending on the polarity of the minute current pulse applied to the winding coil 340. The materials that form these I-Rubys include:
Semi-hard magnetic materials are preferred and their properties are as follows.

(1) Must have a high residual magnetic flux density (Sr) of 4 (Br: 10 to G or higher) (A) Must have a certain degree of coercive force (1-1c) (Hc: 13 to 1SO Oersted) (3) Square stopper Cars (Br/B) are expensive (Br/B)
300 s or more) (Li) It has relatively high toughness and can be bent and crushed in the cold.

A preferred embodiment includes the product name VICALLOY%R.
It belongs to the α-r am kaikin, which is called by names such as EMENDR. Furthermore, without being limited to this, for example, Fe-N1 alloys have similar characteristics,
These may be used to make one piece, and although the shape of the one piece is a circular rod shape in the embodiment, it can be made into a square or plate shape as long as it can be made into a shape that can be compatible with the above-mentioned shape. It may have any other shape.

Finally, the terminal board 400 may be made of resin molded like the platen 200, and is designed to be able to arrange various terminals Go, S, R%N, and N2 to be connected to the drive circuit. . Further, an electromagnet device 300 is installed and held at the upper opposite corner of the terminal board 400, and is inserted into the opposite corner chamber 2sO of the platinum 200 from below.
A protrusion 410 is integrally formed to allow the terminal plate 41)O to be fixedly attached to the lower part of the bracket 200. Reference numeral 420 designates a fixing plate that is formed integrally with the terminal plate 400 and is used to fix an electrical element, such as a diode, that forms part of the drive circuit.

The terminal S is a terminal for applying a set signal for setting the display element, the terminal R is a terminal for applying a reset signal, and the terminal CO is a common terminal at that time. N and N.

is an intermediate connection terminal for the coil lead wire.

Each lead aa-h of the drive coil 340.350 is
As shown in Figure 3, each coil part 341, 342, 851, 352 and each terminal S are connected to each other to make the connection relationship clearer.
Figure 1 is an enlarged view of the state of the magnetic reversal display element in Figure 3 when assembly is completed, viewed from the display surface side. Figure 6 is the 3rd edition.
8-A line sectional view of the figure.
The display disk 110 to which the circular permanent magnet 120 and the two-strand circular permanent magnet 130 are attached is slightly curved and inserted into the support bearing hole 211 of the support plate 210 at both opposite corners of the rotating shaft 150 or racket 200 at both ends. In this way, the 0 display disk 110, which supports the display member 100 on the platen 200 in a reversible manner, can be reversed around the rotation axis 150. The slice plate 140 is provided to minimize the frictional resistance at this time, and is preferably formed of a material with a coefficient of friction as small as possible.

As best shown in FIG.
o tz, drive coil 54os 8SO's +)-)'
The wires a to h are connected to the corresponding terminals of the terminal board 400, and the bulge 310 is installed between the protrusions 4100 of the terminal board 400, thereby being attached to the terminal board 400. The terminal board 400 on which the trap and electromagnet device 300 are installed is connected to the terminal board 400 of the electromagnet device 300 from below the platen 200.
- The ruby metal 320° 330, the drive coils 340, 350 wound thereon, and the protrusion 410 of the terminal plate 400! Enter the opposite corner room 250 in the opposite corner of the racket 2000,
/ - Rubies 320, 380 upper end is open 25
1 and located below the first circular permanent magnet 120 and the first circular permanent magnet 130,! racket 2
Attached to 00.

The locking piece 220 provided at the upper end of the bracket 200 is
When the display table 11111 of the display disk 111 is displayed, as shown in FIG. It has a front surface 221.Furthermore, the locking piece 220 can be used when the display disk 110 is inverted and the display back side 11 is displayed, as described in 5 below.
The display back surface 112 has a No. 10 locking surface 222 that locks the display disk 110 in a state shifted by a certain angle from perpendicular to the viewing direction. These locking surfaces 22
1 and 222 have the function of preventing damping of the display disk 110 during each inversion drive of the display disk 110.

Next, with reference to FIGS. 7 and 1, the operating principle of the magnetic reversal display element of the present invention will be described in detail.

FIG. 7 schematically shows the positional relationship and magnetic state of each member in the state IK in which the display surface 111 of the display disk 110 is displayed. 7 (Q is a left side view, FIG. 7 (a seagull is a right side view), and C and S are the positions of each member in the state where the display back surface 112 of the display disk 11G is displayed! The relationship and magnetic state are shown diagrammatically. Figure 1 is a plan view, Figure 2) is a front view, KzEΩ is a left side view, and Figure 3 is a sentient surface view. In these figures, arrow B indicates the viewing direction, arrow C indicates the reversal direction of the display disk, and arrow O indicates the direction of flow current to the coil.What should be noted here is that The polarity of each pole piece is due to the residual magnetism after the drive current/curse has flowed.

As shown in FIG. 7, when the display surface 111 is displayed, the display disk 11G is stopped by the locking surface 221 of the locking piece 220 so as to be perpendicular to the viewing direction BK. At this time, as shown in Figure 7 (Q),
The magnetic pole axis N-S of the circular permanent magnet 120 is a single bead 32
0 and an attractive force F3 is applied between the N pole of the first circular permanent magnet 120 and the S pole of the first circular magnet 320. On the other hand, as shown in FIG. 7(2), the magnetic pole axis SN of the first circular permanent magnet 130 is shifted by an angle of 0 with respect to the eleventh piece 330, and the S-N of the first circular permanent magnet 130 is shifted by an angle of 0.
An attractive force F4 is acting between the pole and the north pole of the pole beer 330. Due to these attraction forces F3 and FK, the display disk 110 is held in the state a in which the display table 1ti111 is displayed.In fact, the attraction force F4 causes the display disk 110 to be held on the locking surface 221 of the locking piece 220. Since it acts to press against the surface, it can be held stably.

In order to change the display state of the display surface 111 shown in FIG. 7 to the display state of the display back surface 112 shown in FIG.
As shown in , a drive voltage is applied between the reset terminal R and the common terminal CO, and a drive current flows smoothly to the coil portions 342 and 351 in the direction of the arrow.
The connection relationship between the coil portion and each terminal shown in FIG. 7 (■) is shown in the wiring diagram Kffj shown in FIG. At this time, in the summary diagram,
- The polarity of the magnetic pole of the one piece 320 changes from the S pole to the N pole, and the polarity of the magnetic pole of the one piece piece 33G changes from the N pole to the S pole. Therefore, the I-Rubys 320 generates a repulsive force with the first circular permanent magnet 120, and the I-Rubys 330 generates a repulsive force with the first circular permanent magnet 130. A driving torque is applied to the disk in a direction away from the locking table FIJ221 of the locking piece 220, and the reversal operation of the display disk 110 is performed easily, quickly and reliably, and the state is shifted to the state shown in FIG.

As shown in FIG. 8, when the display back surface 112 is displayed, the display disk 110 is moved to a tilted position tK that is deviated by an angle θ from a position perpendicular to the viewing direction BK by the locking surface 222 of the locking piece 220. It has been stopped. At this time, as shown in Figure a, the magnetic pole axis N of the first circular permanent magnet 130 is
-9 is aligned with the 4-Rubys 330, and an attractive force F acts between the N pole of the first circular permanent magnet 130 and the S pole of the 4-Rubys 330. On the other hand, as shown at tWJrct, the magnetic pole axis S-N of the first circular permanent magnet 120 is shifted by an angle of - with respect to the pole piece 320, and @1
An attractive force F is acting between the S pole of the circular permanent magnet 120 and the N pole of the I-Rubys 320. Due to these attractive forces F and FK, the display disk 110 is
It is maintained in a state where l 2 is displayed, but especially the suction force F is l.

Since the display disk 110 is pressed against the locking surface 222 of the locking piece 220, it can be held more stably.

In order to change from the display state of the display back 112 in Fig. S to the display state of the display surface 111 of Fig. 7, it is necessary to It is sufficient to apply a driving voltage to the coil portions 341 and 352 to cause a driving current pulse to flow in the direction of the arrow.Here, the connection relationship between the coil portion and each terminal in Fig. 9 is as shown in Fig. 9. According to the wiring diagram. At this time, in the first @, the polarity of the magnetic pole of the -1 piece 320 changes from the N pole to the S pole, and the I
- The polarity of the magnetic pole of Ruby's 330 changes from S pole to N pole. Therefore? -Rubys 320 is the first circular permanent magnet 12
0, and the -1 piece 330 generates a repulsive force between it and the U-th circular permanent magnet 130. In particular, the repulsive force of the former causes the display disk to move away from the locking surface 222 of the locking piece 220. When a driving torque is applied in the direction of separation, the display disk 1'10 is quickly and reliably retracted, and the state shown in FIG. 7 is reached.

In the above embodiment, the angle between the magnetic pole axis of the first circular permanent magnet 130 and a line perpendicular to the surface of the display disk 1100, and the surface of the display disk 110 stopped by the engaging surface 2'22 of the locking piece. and the angle formed by the direction perpendicular to the viewing direction 8 by °C, but these angles may not be completely equal but may differ to some extent, and these angles 4'! ,' may be any value as long as sufficient reverse starting talk and stable holding torque are obtained.

Further, the display surface 111 and the display back surface 112 of the display disk 110 may be provided with a true color, or may be provided with different display characters or symbols, or may be shaped in any desired shape depending on the display purpose. It's a lot of things.

As in the above-described embodiment of the present invention, the drive coil is divided into four parts and wound (in order to clearly show the effect of this,
The relationship between the amount of protrusion of the pole piece of a magnetic reversal display element and the ampere frequency of the drive coil in a magnetic reversal display element in which the drive coil is wound around a yoke as in the conventional example shown in FIG. The relationship between the amount of magnetization of the pole piece of the magnetic reversal display element and the amperage of the drive coil is compared and shown in Figure 1 and Figure 10.

Figure 9 shows the case where the drive pulse width is /mS, and the 10th
The figure shows the case where the driving pulse width is SOOμS, and III &
The curve A shows the relationship in the conventional example, and the - line B shows the relationship in the embodiment of the present invention.

As is clear from comparing these curves ^ and curve B,
At the same amperage, the amount of magnetization of I-Rubys in the embodiment of the present invention is much higher,
According to the present invention, the magnetic reversal display element can be intensified to that extent.
It can be lightweight, drive at low voltage, and have high-speed response.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a schematic diagram showing a conventional example of a magnetic reversal display element, FIG. 2 is a schematic diagram of a magnetic reversal display element that does not provide a detailed explanation of the present invention, and FIG. 3 is an embodiment of the present invention. A perspective view of the disassembled parts and product arrangement showing a magnetic reversal display element as shown in Figure 1IiJ. Figure 3 is an enlarged view of the magnetic rotary display element when assembled, viewed from the display surface side, Figure 6 is a sectional view taken along line 8-A in figure @j, and Figure 7 is the
A diagram schematically showing the positional relationship and magnetic state of each member in a state where the display surface of the display disk in the magnetic reversal display element shown in the figure is displayed. Figures 9 and 10 schematically show the positional relationship and magnetic state of each member when the back side of the display is displayed. FIG. 3 is a diagram showing a comparison of the relationship between the amount of magnetization of the pole piece and the amperage of the drive coil. DESCRIPTION OF SYMBOLS 11...Display disk, 12.13...Circular permanent magnet, 14', 15'*y*-Rubies, 18'-W-ri, 17'...Drive coil, 18...Case. Fig. 1 7 Fig. 2 () ￥−仝°＼）−61−omikin−→−11 Saitaki−9

Claims (1)

[Claims] a display disc supported so as to be reversible; rt and permanent a stones provided around the reversal axis A of the armpit display disc so as to be reversible together with the display disc; In a magnetic reversal display element equipped with an electromagnet device which has respective magnetic poles at positions facing the respective stones and is capable of reversing am, the electromagnet device is provided with both IIK/- rubies of silicate and A magnetic reversal display element characterized in that a pole piece is provided with a driving coil hf.