JPH1049042A - Braille display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braille display unit applicable to a braille display device to a specification with a different number of brailles per line and permitting to deal with partial failure. SOLUTION: A braille pin driving part is provided with a yoke 61, a coil 63, a permanent magnet 65, an armature 67, a leaf spring 69, and coiled spring 71. A coil winding 63b selectively generates a magnetic field where gravitation force acts between the armature 67 and core 63a and a magnetic field where repulsive force acts according to the polarity of the exciting current from power supply control circuit. When the magnetic field of acting gravitation force is generated, the permanent magnet 65 forms a magnetic circuit passing through core 63a, armature 67, and yoke 61. The abutted state of the armature 67 and core 63a is selfmaintained by this magnetic circuit even after the exciting current to coil 63 is cut off. This self-hold state is canceled by extinction of the magnetic circuit due to separation of the armature 67 and core 63a from each other. The armature 67 is coupled with a right end part of the yoke 61 to be turnable clockwise/counterclockwise, and an end of the leaf spring 69 is fixed up to the top part of the armature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Braille display unit for displaying, on a display board, an uneven pattern of Braille pins according to given Braille data by moving a plurality of Braille pins up and down. .

[0002]

2. Description of the Related Art Braille is usually represented by six or eight points per character. In addition, in the expression of a sentence using Braille, a maximum of 36 characters in one line expression, page NO. Or line NO. 2 each
Braille for a total of 40 characters is required. That is, 1
In the case of 6 points, 240 points are required, and in the case of 8 points, 320 points are required. Conventionally, one display panel has 240 or 320 holes, and each hole has 240 or 32 holes.
There has been proposed a Braille display device in which zero Braille pins are implanted and each Braille pin is individually moved up and down by a drive unit having a coil to display desired character information.

[0003]

By the way, in the Braille display device having the above structure, one display panel has 24
It is necessary to make a large number of holes of 0 points or 320 points, and it is necessary to make these holes with high precision.
In addition, since a Braille pin must be implanted in each hole, the operation is extremely troublesome. In addition, since the number of holes and the number of braille pins are large, the reliability of the device must be reduced, and the price of the device itself becomes extremely expensive, and it cannot be widely used. Did not.

Further, in the above-described apparatus, a plurality of driving units for driving each Braille pin are provided immediately below the installation position of each Braille pin. Therefore, any one of the Braille pins or its driving unit is provided. When a problem such as a failure occurs, there is also a problem that only the relevant portion cannot be separated from the others and replaced with a new one, and the entire device is wasted.

Further, as described above, one display panel has 240
In a device having a large number of holes of 320 points or 320 points, the number of characters per line (the number of braille characters) cannot be changed arbitrarily. The display board cannot be diverted. Therefore, it is necessary to remanufacture a display board having a new hole for 20 characters per line, and it is not possible to flexibly cope with a different standard.

Accordingly, an object of the present invention is to provide a Braille display unit which can be applied to a Braille display device of a standard having a different number of Brailles per line, and which can flexibly cope with a partial failure or malfunction. To provide.

[0007]

A Braille display unit according to a first aspect of the present invention comprises a plurality of drive units for individually moving Braille pins provided in a plurality of through holes of a display panel in a vertical direction. The plurality of driving units are stacked along the moving direction of the Braille pins.

[0008] The plurality of stacked driving units are, for example,
It can be arranged on at least one of the upper side and the lower side of a plurality of braille pins constituting one Braille character.

According to this configuration, it is extremely easy to arrange the units in the horizontal direction by an amount corresponding to a desired number of characters. Therefore, it is possible to flexibly cope with a braille display device with a standard of 20 characters per line and a braille display device with a standard of 36 characters per line. Further, even if a failure such as a failure occurs in any of the units constituting one row, only the corresponding unit can be replaced.

In the above configuration, a display plate having a number of through holes corresponding to two braille characters may be used.

A Braille display unit according to a second aspect of the present invention comprises a plurality of drive units for individually moving Braille pins provided in a plurality of through holes of a display plate in a vertical direction. The driving unit is arranged on at least one of the upper side and the lower side of the plurality of braille pins constituting one braille character.

The plurality of driving units are stacked along the direction in which the Braille pins move.

With this configuration, the same effect as described above can be obtained.

A plurality of driving units according to the third aspect of the present invention are for individually driving Braille pins provided in each through hole of the display panel. A braille pin holding mechanism for selectively performing a first operation for projecting a braille pin from each through-hole and a second operation for immersing the braille pin into each through-hole, and different directions according to the direction of the supplied excitation current And a holding mechanism driving means for causing the Braille pin holding mechanism to perform one of the first operation and the second operation by using these magnetic fields.

The Braille pin holding mechanism may include a permanent magnet forming a magnetic circuit for holding the Braille pin in a state where the first operation is performed.

If a permanent magnet is provided, the braille pin is held in a state of protruding from the through hole even if the supply of the exciting current to the holding mechanism driving means is cut off. Along with the pins, a concavo-convex pattern formed by braille pins for displaying a specific character is held, and can also function as a memory. Also, the power consumption is greatly reduced.

Further, the braille pin holding mechanism may be provided with an elastic member that generates a reaction force according to the pressing force when the braille pin is pressed.

According to this, when the braille pin protruding from the through hole is lightly pressed with the fingertip, the braille pin moves up and down by the vertical elastic force of the elastic member, so that fatigue of the fingertip is reduced. .

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view schematically showing a Braille display unit according to one embodiment of the present invention, FIG. 2 is a rear view schematically showing a Braille display unit according to one embodiment of the present invention, and FIG. 1 is a plan view showing a braille display unit according to an embodiment of the present invention. 1 to 3
The Braille display unit shown in (1) has a specification of expressing one Braille character using ten Braille pins, and one unit includes twenty Braille pins necessary for expressing two Braille characters.

As shown in FIG. 1 to FIG. 3, the unit includes a top plate 51 and a bottom plate 53 each having a rectangular shape.
Braille pins 1 to 20 and 20 Braille pin driving units A1
To E4. As shown in FIG.
Twenty through holes 57 are arranged in a matrix at predetermined intervals. Each of the through holes 57 is provided with a corresponding Braille pin 1 to 20 which is held by a holding mechanism (shown in FIG. 10) described later in detail so as to be able to protrude and retract. Each of the Braille pins 1 to 20 has a corresponding Braille pin driving unit A1 to A1.
The upward movement protruded from the through-hole 57 by E4 and the downward movement retracted into the through-hole 57 are selectively performed.

In this embodiment, FIGS. 1 to 3 and FIG.
As shown in FIG. 8, each of the Braille pin driving units A1 to E4
The driving units A1 to A4 are in the uppermost layer, the driving units B1 to B4 are in the second layer from the top, and the driving units C1 to C4 are in the third layer from the top.
However, the driving units D1 to D4 are arranged in the fourth layer from the top, and the driving units E1 to E4 are arranged in the lowermost layer in a stacked manner.

That is, as shown in FIG. 1, the driving units A1, B
A first stack S1 is formed by five pieces of C1, D1, E1, and a second stack S2 is formed by five pieces of driving parts A2, B2, C2, D2, and E2. Also, as shown in FIG.
The third stack S3 is composed of five driving units A3, B3, C3, D3, and E3, and the third stack S3 is composed of five driving units A4, B4, C4, D4, and E4.
Each of them forms a fourth stack S4. Therefore, in the present embodiment, each of the Braille pin driving units A1 to E4 provides a line between the top plate 51 and the bottom plate 53, one row above and below one Braille character, and one above and below another Braille character. One row on each side,
That is, four stacks S1 to S4 arranged in two rows and columns.
Is formed.

Here, the correspondence between the driving units A1 to E4 and the braille pins 1 to 20 will be described with reference to FIGS.

FIG. 4 shows an outline of the configuration of the above unit when viewed from below along the line II 'in FIG.

Each of the driving units A1 to A4 shown in FIG. 4 constitutes the uppermost layer of the first stack S1 to the fourth stack S4, and the driving unit A1 is located above one Braille character (left side in FIG. 3). , And the drive unit A2 drives the Braille pin 5 located below (right side in FIG. 3) one character of Braille. Further, the driving unit A3 is a braille pin 11 located above (left side in FIG. 3) another one braille character.
And the driving unit A4 is located below the other one Braille character (the right side in FIG. 3).
Are driven respectively.

FIG. 5 shows an outline of the configuration of the unit when viewed from below along the line II-II 'in FIG.

Each of the driving units B1 to B4 shown in FIG. 5 constitutes the second layer from the top of the first stack S1 to the fourth stack S4, and the driving unit B1 is located above one character of Braille (see FIG. 5). 3 is located on the left side (the left side of FIG. 3), and the drive unit B2 is located on the lower side (the right side of FIG. 3) of one braille character.
0 are respectively driven. Drive unit B
Reference numeral 3 denotes a Braille pin 16 located above (left side in FIG. 3) another one Braille character, and a driving unit B4 denotes a Braille pin 20 located below (right side in FIG. 3) another one Braille character. It is designed to be driven.

FIG. 6 shows an outline of the structure of the unit when viewed from below along the line III-III 'in FIG.

The driving units C1 to C4 shown in FIG. 6 constitute the third layer from the top of the first stack S1 to the fourth stack S4, and the driving unit C1 is located above one character in Braille (see FIG. 6). 3 is located on the left side of the Braille pin 2, and the driving unit C2 is located on the lower side of one Braille character (the right side of FIG. 3).
Are respectively driven. The driving unit C3
Is a braille pin 12 located above (in the left side of FIG. 3) another one Braille character, and the driving unit C4 is a lower side (see FIG.
(On the right side of the drawing) are driven respectively.

FIG. 7 shows an outline of the configuration of the unit when viewed from below along the line IV-IV 'in FIG.

Each of the driving units D1 to D4 shown in FIG. 7 constitutes the fourth layer from the top of the first stack S1 to the fourth stack S4, and the driving unit D1 is located above one character in Braille (see FIG. 3 is located on the left side, and the driving unit D2 is a braille pin 9 located on the lower side (right side in FIG. 3) of one character.
Are respectively driven. The driving unit D3
Is a braille pin 17 located on the upper side (left side of FIG. 3) of another Braille character, and the driving unit D4 is a lower side of another Braille character (FIG. 3).
(On the right side of) is driven.

FIG. 8 shows an outline of the configuration of the unit when viewed from below along the line VV 'in FIG.

Each of the driving units E1 to E4 shown in FIG. 8 constitutes the lowermost layer of the first stack S1 to the fourth stack S4. The driving unit E1 is located in the middle of one Braille character (see FIG. 3). The driving unit E2 drives the Braille pin 3 located in the middle of one Braille character and the driving Braille pin 3 respectively. The driving unit E3 drives the Braille pin 13 located at the middle of another Braille character (see FIG. 3), and the driving unit E4 drives the Braille pin 18 located at the middle of another Braille character. Has become.

From the above description, the correspondence between the driving units A1 to E4 and the Braille pins 1 to 20 has been clarified.

Next, the configuration of the Braille pin driving section B2 will be described in detail with reference to FIGS. Each drive unit A1 to E4
Since the components have the same configuration, to avoid duplication, the description of the remaining driving units except for the driving unit B2 is omitted here.

FIG. 9 shows the structure of the drive unit B2 when the unit is viewed from above with the drive unit A2 constituting the uppermost layer of the second stack S2 removed, and FIG. 10 shows the structure of FIG.
FIG. 11 shows a cross-sectional structure when the driving unit B2 is cut along the line VI-VI ′, and FIG. 11 shows a configuration of the driving unit B2 when viewed downward from the line VII-VII ′ in FIG.

The drive section B2 includes a yoke 61 as shown in the figure.
, Coil 63, permanent magnet 65, armature 67
, A leaf spring 69 and a coil spring 71.

The yoke 61 has a substantially L-shaped cross section, and is provided between the top plate 51 and the bottom plate 53 between the top plate 51 and the bottom plate 53.
Are fixed in a cantilever manner by fasteners in a manner shown in the figure, and a leaf spring 6 is provided on the upper surface.
9 is provided with a fixing member 75 for mounting and fixing one end of the fixing member 9.

The coil 63 includes an iron core 63a, a coil winding 63b, and a pair of fixing pieces 63c. Most of the iron core 63a has a prismatic shape, and has a flat plate-like mounting portion for mounting the permanent magnet 65 on the left end side shown in FIG. The iron core 63a wound with the coil winding 63b is vertically fixed to the mounting plate 73 by a fastener together with the permanent magnet 65, so that the coil 6
3 is arranged below the yoke 61 in a state shown in FIG.

As the coil winding 63b, a conductor having an arbitrary electric resistance value can be selected according to the driving voltage of the coil.

The coil winding 63b is formed in accordance with the polarity of an exciting current from a power supply control circuit (shown in FIG. 12) described later.
As shown in FIG. 10, a magnetic field in which an attractive force acts and a magnetic field in which a repulsive force acts are selectively generated between the armature 67 and the iron core 63a.

The pair of fixing pieces 63c are inserted into the iron core 63a so as to sandwich the coil winding 63b from both end surfaces thereof in order to fix the coil winding 63b wound around the iron core 63a.

The permanent magnet 65 is used to maintain the state of the Braille pin 10 by its magnetic force. When the excitation of the coil 63 generates a magnetic field in which an attractive force acts between the armature 67 and the iron core 63a, the permanent magnet 65 Iron core from 65
a, permanent magnet 6 through armature 67 and yoke 61
5 is formed. With this magnetic circuit,
The contact state between the armature 67 and the iron core 63a is maintained even after the supply of the exciting current causing the coil 63 to generate the magnetic field is cut off. In this self-holding state, an exciting current that generates a magnetic field in which a repulsive force acts between the armature 67 and the iron core 63a (that is, an exciting current in an opposite direction to the exciting current that generates a magnetic field in which an attractive force acts) is applied to the coil 63. The magnetic circuit disappears when the armature 67 and the iron core 63a are separated from each other. The permanent magnet 65 has at least a coil spring 71
It is assumed that a permanent magnet having a magnetic field strength higher than the urging force is used.

The armature 67 has a substantially L-shaped cross section, and is rotatably engaged with the right end of the yoke 61 in the clockwise / counterclockwise direction in the vicinity of a portion bent substantially at a right angle. An upper end of a leaf spring 69 is fixed by a fastener.

The leaf spring 69 moves the Braille pin 10 up and down by swinging following the rotation of the yoke 61, and is formed in a shape as shown in FIG. 9 by a thin material. It has a first portion having a rectangular shape with a large area and an elongated second portion. The end of the first portion is fixed to the yoke 61 by a fastener, and a fixing member 77 for attaching and fixing the other end of the coil spring 71 is provided on the upper surface of the end of the first portion. . Also, the first
Is provided with a slit 69 in which the coil spring 71 can be immersed.
The fixing member 75 described above faces the slit 69a. The second part is the mounting plate 7
3, a circular through-hole 69b is formed at the end of the second portion so that the lower end of the braille pin 10 can be inserted therein. 9 and FIG. 10).

With the above configuration, the leaf spring 69 is
It can be seen that swinging follows the rotation of the yoke 61 by the vertical length of 3a.

The coil spring 71 has one end on the yoke 61 side via the fixing member 75 and the other end on the fixing member 7.
The armature 67 and the leaf spring 69 are respectively attached to the armature 67 and the leaf spring 69 via the armature 7, and urge the armature 67 and the leaf spring 69 counterclockwise in FIG.

FIG. 12 shows the driving units A1, B1, C1, D1, E1 of the first stack S1 corresponding to the Braille pins 1 to 10.
And the driving units A2, B of the second stack S2
2 shows a power supply control circuit for individually controlling power supply to each coil of C2, D2, and E2. In addition, braille pins 11-
20, driving units A3 and B3 of the third stack S3,
The power supply control circuits for individually controlling the power supply to the coils C3, D3, and E3 and the coils of the drive units A4, B4, C4, D4, and E4 of the fourth stack S4 are described in the above power supply control circuit. Since the configuration is the same, illustration and description are omitted.

As shown, the power supply control circuit includes a D latch 81, a pair of AND circuits 83a and 83b, and a drive current switching circuit 85 for each of the drive units A1 to E2. I have.

Of the D latches 81 of the driving units A1 to E2, the D latches 81 of the driving units A1 to C2 correspond to the clock pulse signal -CP1 (controller (not shown)) applied to the clock terminal CP from the inverter circuit 87.
(A signal obtained by inverting the clock pulse signal CP1). Also, D of the remaining driving units D2 to E2
Regarding the latch 81, the clock pulse signal −CP2 applied from the inverter circuit 89 to the clock terminal CP
It is driven in synchronization with (a signal obtained by inverting the clock pulse signal CP2 from a controller (not shown)). Further, a clear signal CL output from a controller (not shown) and inverted by the inverter circuit 91 is applied to the clear input terminal CL of the D latch 81 of each of the driving units A1 to E2. Is cleared. Further, data buses DB1 to DB10 for transmitting control data output from a controller (not shown) are connected to a D input terminal of each D latch 81, respectively.

Here, the D latch 81 of the driving units A1 to C2
The reason why the clock pulse signal -CP1 is applied to the D latches 81 of the driving units D2 to E2, respectively, is that the power supply control circuit is controlled by an 8-bit or 16-bit controller (not shown). ). For example, for an 8-bit controller, the clock pulse signal -CP
This is because it can be handled by shifting the phase of the clock pulse signal -CP2 from the phase of the clock pulse signal -CP2.

Hereinafter, the braille pin 1 described with reference to FIGS.
Each unit corresponding to the driving unit 2 that drives 0 is described.

The D-latch 81 controls the latch / unlatch state of a signal applied to a D input terminal from a controller (not shown) through a data bus DB7 by a clock pulse signal -CP1 applied to a CP input terminal. is there. The D latch 81 is connected to the D input terminal and the CP
In addition to the input terminal, a CL input terminal to which a clear signal CL for clearing the D latch 81 is applied, a Q output terminal to which the latched signal is output as it is, and a logic level of the latched signal. -Q which is inverted and output
An output terminal.

The AND circuit 83a is connected to an output signal from the Q output terminal of the D latch 81 and a controller (not shown).
From the strobe pulse STB1 (the pattern of the braille pin corresponding to the braille data set in the controller,
A logical product is calculated with the signal for expressing on the Braille display unit) and output to the drive current switching circuit 85.

The AND circuit 83b is connected to the -Q of the D latch 81.
An output signal from the output terminal and the strobe pulse ST
A logical product is calculated with B1 and output to the drive current switching circuit 85.

The drive current switching circuit 85 is for supplying an exciting current to the coil 63 based on an external command, and has an AND terminal as an input terminal for an exciting current direction switching command signal.
A first input terminal corresponding to the output of the circuit 83a;
A second input terminal corresponding to the output of the circuit 83b. Here, when a signal of a logic level “H” is applied to the first input terminal, a pulse current in a direction for generating a magnetic field on which the attractive force acts is supplied to the coil 63 as an excitation current. Also, when an input signal of a logical level “H” is applied to the second input terminal, a pulse current in a direction for generating a magnetic field on which the repulsive force acts is supplied to the coil 63 as an exciting current.

In this case, if the logic level of the signal from the Q output terminal of the D latch 81 is "H", the signal of the logic level "H" is applied to the first input terminal and the logic level is applied to the second input terminal. Since the “L” signal is applied respectively, the switching circuit 85
Supplies, to the coil 63, a pulse current in a direction that generates a magnetic field on which the above-mentioned attractive force acts as an excitation current. On the other hand, D
If the logical level of the signal from the −Q output terminal of the latch 81 is “H”, the logical levels of the signals applied to the first and second input terminals are opposite to those described above.
Supplies, to the coil 63, a pulse current in a direction to generate a magnetic field on which the repulsive force acts instead of the supply of the pulse current, as an excitation current. The magnitude of the pulse current described above,
The ON time width and the value of the drive voltage applied to the coil 63 are:
It can be set arbitrarily.

The supply of the pulse current (excitation current) by the drive current switching circuit 85 is stopped when a clear signal is applied to the clear terminal CL of the D latch 81, for example.

Next, the operation of the braille pin driver B2 will be described in detail with reference to FIGS. Each drive unit A1 to E4
Have the same configuration, the operation is the same. Therefore, in order to avoid duplication, the description of the operation of the remaining drive units except for the drive unit B2 is omitted here.

First, in a state where all of the braille pins 1 to 20 are immersed in the through holes 57 of the top plate 51, an AND circuit 83 is provided by a signal transmitted to the D latch 81 through the data bus DB7.
When a signal of the logic level “H” is applied from a to the first input terminal, the switching circuit 85 supplies a pulse current to the coil 63 in a direction to generate a magnetic field on which the above-mentioned attractive force acts.

Thus, the armature 67 is connected to the iron core 63
armature 67
The plate spring 69 rotates clockwise in FIG. 10 against the urging force of the coil spring 71, and the Braille pin 1
0 is pushed up to protrude from the through hole 57. At this time,
The lower end of the armature 67 has an iron core 6 as shown in FIG.
In order to abut on the right end of 3a, the permanent magnet 65 has a strength exceeding the urging force of the coil spring 71, and passes from the permanent magnet 65 to the permanent magnet 65 through the iron core 63a, the armature 67, and the yoke 61. The resulting magnetic circuit is formed. Due to this magnetic circuit, even if the supply of the pulse current (excitation current) is cut off, the armature 67 and the iron core 63a
Is kept in a self-holding state.

As described above, when the braille pin 10 protruding from the through hole 57 is lightly pressed with a fingertip, the braille pin 10 moves up and down due to the vertical resilience of the leaf spring 69. It is reduced.

The state in which the braille pin 10 protrudes from the through hole 57 is self-held by the magnetic force of the permanent magnet 65 unless the contact state between the armature 67 and the iron core 63a is forcibly eliminated. For this reason, character data (in this case, data for one character) expressed by a pattern of concavities and convexities of the other braille pins 1 to 9 including the braille pin 10 is held. In addition to the function described above, a function as a memory for character data including a plurality of braille pins can also be achieved.

Next, the signal transmitted to the D latch 81 through the data bus DB7 causes the AND circuit 83b to output the second
When a signal of logic level “H” is applied to the input terminal of
The switching circuit 85 supplies the coil 63 with a pulse current in a direction for generating a magnetic field on which the repulsive force acts. Thereby, a repulsive force acts between the armature 67 and the iron core 63a, and the armature 67 and the leaf spring 69 rotate counterclockwise in FIG. 10 by the repulsive force and the urging force of the coil spring 71. As a result, the braille pin 10 is immersed in the through hole 57.

As described above, according to one embodiment of the present invention, a plurality of Braille pin driving units A1 having a number of Braille pins corresponding to two Braille characters and moving each Braille pin up and down. To E4 are stacked between the top plate 51 and the bottom plate 53, and four stacks S1 to S4 arranged in two rows and columns.
Since the configuration is such that S4 is formed, it is extremely easy to arrange the units in the horizontal direction by an amount corresponding to the desired number of characters. Therefore, it is possible to flexibly cope with a braille display device with a standard of 20 characters per line and a braille display device with a standard of 36 characters per line. Further, even if a failure such as a failure occurs in any of the units constituting one row, there is an advantage that only the corresponding unit can be replaced.

The state in which the braille pin 10 protrudes from the through hole 57 is self-held by the magnetic force of the permanent magnet 65 unless the contact state between the armature 67 and the iron core 63a is forcibly canceled. For this reason, character data (in this case, data for one character) represented by a pattern of concavities and convexities of the other braille pins 1 to 9 including the braille pin 10 is held. In addition to the function as a mere Braille display, it can also function as a memory for character data composed of a plurality of Braille pins. Therefore, unlike a device that retains a character pattern composed of a plurality of Braille pins by continuing to energize the coil, power consumption can be greatly reduced.

Further, since each of the Braille pins 1 to 20 is attached to the armature 67 via a leaf spring 69 having a resilient force acting in the vertical direction, the Braille pins 1 to 20 protruding from the through holes 57 are provided. When the finger 20 is lightly pressed with a fingertip, the leaf spring 6
The braille pin 10 moves up and down due to the resilience of 9. Therefore, the fatigue of the fingertip of the device user can be reduced.

It should be noted that the above-described contents are merely related to one embodiment of the present invention, and do not mean that the present invention is limited to only the above-described contents.

In the present embodiment, in a specification in which one Braille character is expressed by using ten Braille pins, a Braille display unit having a configuration in which 20 Braille pins necessary for expressing two Braille characters are defined as one unit is used. The example has been explained. However, in a specification in which one Braille character is represented by six Braille pins, a configuration in which 12 Braille pins for two Braille characters are defined as one unit, or a specification in which one Braille character is represented by eight Braille pins In this case, the present invention is naturally applicable to a configuration in which 16 Braille pins for two Braille characters are used as one unit.

Further, in this embodiment, each of the Braille pin driving units A1 to E4 is connected to the armature and the leaf spring when the armature and the leaf spring come into contact with the iron core of the coil. It was configured such that the Braille pin would sink into the through hole when separated. However, if the mounting direction of the leaf spring to the armature is reversed, the operation of the Braille pin can be reversed.

Further, in this embodiment, two braille characters are replaced by one.
Although the unit is a unit, for example, the present invention is also applicable to a unit in which three characters for Braille are set as one unit.

The Braille display unit according to the present invention can be applied to a Braille blackboard, a Braille reader, a Braille guide box, a Braille display of a personal computer terminal, a Braille savings machine, a Braille newspaper, and the like.

[0074]

As described above, according to the present invention,
The present invention can be applied to a braille display device of a standard having a different number of brailles per line, and can provide a braille display unit having a configuration capable of flexibly coping with a partial failure or malfunction.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of a braille display unit according to an embodiment of the present invention.

FIG. 2 is a rear view showing an outline of a braille display unit according to an embodiment of the present invention.

FIG. 3 is a plan view showing a braille display unit according to an embodiment of the present invention.

FIG. 4 is a diagram showing an outline of the configuration of the unit when viewed from below along the line II ′ of FIG. 1;

FIG. 5 is a diagram showing an outline of the configuration of the unit when viewed downward from the line II-II ′ in FIG. 1;

FIG. 6 is a diagram showing an outline of the configuration of the unit when viewed downward from the line III-III ′ in FIG. 1;

FIG. 7 is a diagram showing an outline of the configuration of the unit when viewed from below along the line IV-IV ′ in FIG. 1;

FIG. 8 is a diagram showing an outline of the configuration of the unit when viewed from below along line VV ′ in FIG. 1;

FIG. 9 is a plan view of a braille pin driving unit according to one embodiment of the present invention.

FIG. 10 is a cross-sectional view of the braille pin driving unit when cut along the line VI-VI ′ in FIG. 9;

FIG. 11 is a cross-sectional view of the Braille pin driving unit as viewed from below along the line VII-VII ′ of FIG. 10;

FIG. 12 is a circuit diagram showing a power supply control circuit for individually controlling power supply to a coil of each Braille pin driving unit.

[Explanation of symbols]

 1-20 Braille pin 51 Top plate 53 Bottom plate 57 Through hole 61 Yoke 63 Coil 65 Permanent magnet 67 Armature 69 Leaf spring 71 Coil spring 73 Mounting plate 75, 77 Fixed member 81 D latch 83a, 83b AND circuit 85 Drive current switching circuit 87 , 89, 91 Inverter circuits A1 to E4 Braille pin driver S1 to S4 stack

Claims (8)

[Claims] 1. A Braille display unit comprising: a plurality of drive units for individually moving a Braille pin provided in a plurality of through holes of a display plate in a vertical direction, wherein the plurality of drive units include a plurality of the Braille pins. A Braille display unit characterized by being stacked along a moving direction. 2. The Braille display unit according to claim 1, wherein the plurality of stacked driving units are arranged on at least one of an upper side and a lower side of a plurality of Braille pins constituting one Braille character. A Braille display unit, characterized in that: 3. The Braille display unit according to claim 1, wherein a number of through holes corresponding to two characters of Braille is formed in the display plate. 4. A Braille display unit comprising a plurality of drive units for individually moving a Braille pin provided in a plurality of through-holes of a display plate in an up-down direction, wherein the plurality of drive units are adapted to display one character of Braille. A Braille display unit, wherein the Braille display unit is arranged on at least one of an upper side and a lower side of a plurality of constituent Braille pins. 5. The Braille display unit according to claim 4, wherein the plurality of driving units are stacked along a direction in which the Braille pins move. 6. A plurality of driving units for individually driving Braille pins provided in respective through holes of a display panel, wherein the Braille pins are moved from each of the through holes in accordance with the direction of an applied magnetic field. A Braille pin holding mechanism for selectively performing a first operation for projecting and a second operation for immersing in each of the through holes, and generating magnetic fields having different directions according to the direction of the supplied excitation current, And a holding mechanism driving means for causing the Braille pin holding mechanism to perform any one of the first operation and the second operation by the magnetic field. 7. The Braille display unit according to claim 6, further comprising: a permanent magnet forming a magnetic circuit for causing the Braille pin holding mechanism to self-hold while the first operation is being performed. Braille display unit. 8. The Braille display unit according to claim 7, wherein the Braille pin holding mechanism is provided with an elastic member that generates a reaction force according to the pressing force when the Braille pin is pressed. Braille display unit.