CN110033674B - Touch sense reproduction rotary self-locking braille lattice display device - Google Patents
Touch sense reproduction rotary self-locking braille lattice display device Download PDFInfo
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- CN110033674B CN110033674B CN201910045386.0A CN201910045386A CN110033674B CN 110033674 B CN110033674 B CN 110033674B CN 201910045386 A CN201910045386 A CN 201910045386A CN 110033674 B CN110033674 B CN 110033674B
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- 230000033001 locomotion Effects 0.000 claims abstract description 17
- 239000011796 hollow space material Substances 0.000 claims abstract description 4
- 241001422033 Thestylus Species 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000006735 deficit Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B21/00—Teaching, or communicating with, the blind, deaf or mute
- G09B21/001—Teaching or communicating with blind persons
- G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays
- G09B21/004—Details of particular tactile cells, e.g. electro-mechanical or mechanical layout
Abstract
The invention discloses a touch reproduction rotary self-locking braille lattice display device. The touch panel, the middle layer plate and the bottom plate jointly enclose into a hollow space for installing the single-point driving unit, the single-point driving unit comprises a contact pin, a rotating body, a permanent magnet, a base center pin and a base edge pin, two pins at the bottom of the single-point driving unit respectively penetrate through two corresponding pin holes of the bottom plate and are fixed on the bottom surface of the bottom plate, the contact pin at the upper part of the single-point driving unit converts rotary motion into linear motion through threaded connection with the rotating body, and the contact pin at the lower part of the single-point driving unit penetrates through a positioning hole of the touch panel to realize the protrusion and self locking of braille points. The invention has the characteristics of compact structure, self-locking and independent control of each single-point driving unit, can realize large-area and dense braille lattice arrangement, and provides hardware support for braille and graphic touch display.
Description
Technical Field
The invention relates to the technical field of touch display, in particular to a touch reproduction rotary self-locking braille lattice display device.
Background
Global demographic results in 2010 by the World Health Organization (WHO) showed that about 2.85 million people had vision impairment to varying degrees worldwide, with the more severe numbers of blind people with impairment being about 3900 ten thousand, accounting for 13.7% of the total vision impairment. The increasing population and society are ageing, people have a light eye protection consciousness, and lack of professional ophthalmic medical staff in medical treatment, and medical resources are unevenly distributed among cities. With the gradual development of the situation, the total number of the blind people in China is enlarged by 4 times by 2020.
Due to the visual impairment, the blind can only feel external information through hearing and touch. At present, the blind person mainly learns by touching the braille books with fingers, and the traditional braille books have lag information and are not easy to carry. Along with the development of the age and the progress of technology, in order to improve the reading and education problems of the blind, the device is not only the honour of the rights of the blind, but also the sense of the fairness of the society, and an unobstructed knowledge and information reading device is urgently needed.
Researchers at home and abroad develop Braille point displays in various driving modes, and partial achievements are converted into products facing markets, but the problems of high power consumption and the like still exist, and the Braille point displays cannot be popularized due to high price. Therefore, the braille dot matrix display device with the characteristics of self-locking, relatively low cost, small volume, portability and the like is developed, and has very important value for the development of the braille dot display.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a touch sense reproduction rotary self-locking braille lattice display device, which has the structural design that eight braille points are used as one side, is easy to assemble in a large scale, and achieves the effect of low power consumption by adopting a thread self-locking mode.
The technical scheme adopted for solving the technical problems is as follows:
the invention comprises a bottom plate, a middle layer plate, a touch plate and a single-point driving unit, wherein the touch plate, the middle layer plate and the bottom plate are sequentially connected from top to bottom through pin shafts penetrating through pin shaft holes, the touch plate, the middle layer plate and the bottom plate jointly enclose a hollow space for installing the single-point driving unit, and the upper end and the lower end of the single-point driving unit respectively extend out of the touch plate and the bottom plate.
The single-point driving unit comprises a contact pin, a rotating body, a permanent magnet and a base, wherein the base is fixed in a base plate groove formed in the upper end face of the base plate, the top surface of the base is provided with a central groove, a through hole for containing a central pin of the base is formed in the middle of the bottom of the central groove, a circle of annular metal sheets are arranged on the top surface of the base around the central groove, and the annular metal sheets are connected with one end of a base edge pin arranged in the base around the central groove; the permanent magnet is embedded in the central groove of the base, and a core bar arranged at the lower end of the permanent magnet is inserted into a positioning hole formed at one end of a central pin of the base; the other end of the base edge pin and the other end of the base center pin are respectively penetrated through the base and the bottom plate and are connected to an external driving circuit; the square lug arranged at the upper end of the permanent magnet is inserted into the square groove at the bottom of the rotating body, the upper end surface of the rotating body is provided with a threaded shaft, the cavity arranged at the lower part of the contact pin is sleeved with the threaded shaft and connected with the threaded shaft through threads, and the round shaft of the contact pin at the upper end of the contact pin is movably arranged in the square groove of the touch pad.
The display comprises eight single-point driving units, wherein the eight single-point driving units are distributed in a 2 x 4 array, namely, one square in the Braille display, and the displays with different sizes can be randomly combined by taking one square as a unit to form eight-point Braille touch control.
The middle of the touch pad is provided with a mounting through hole which is matched with contact pins of eight single-point driving units, and the mounting through hole mainly comprises a square groove and a positioning hole which is positioned on the upper end surface of the square groove in a butt joint manner; the contact pin mainly comprises a contact pin main body and a contact pin circular shaft positioned on the upper end surface of the contact pin main body; the round shaft of the contact pin is in clearance fit with the positioning hole of the touch pad, and the contact pin main body and the square groove are in clearance fit to limit the circumferential rotation movement of the contact pin.
The bottom surface of the bottom plate groove is provided with edge pin holes and center pin holes corresponding to the eight single-point driving units, and the center pin holes of each bottom plate and the positioning holes of the touch pad are located in the same axis.
The lower ends of the base edge pins and the base center pins of each single-point driving unit penetrate out of the lower bottom surface of the base plate through the edge pin holes and the center pin holes of the base plate respectively.
The permanent magnet can conduct electricity.
The touch driving units are connected with the control circuit board, and the control circuit board controls current to flow in from the edge pins of the base and flow out from the center pins of the base through the permanent magnets, namely, the current flows in from the center of the permanent magnets and flows out along each radial direction of the permanent magnets, or controls the current to flow in from the center pins of the base and flow out from the edge pins of the base through the permanent magnets, namely, the current flows in from the outer ring of the edge of the lower end face of the permanent magnets and flows out along the center of the permanent magnets. The current and the inherent axial magnetic field inside the permanent magnet are mutually perpendicular, so that tangential ampere force is generated at the edge of the permanent magnet, and the permanent magnet is driven to axially rotate, so that the rotating body is driven to rotate.
The contact pin is in threaded fit with the rotating body to convert the rotating motion of the rotating body into the vertical linear motion of the contact pin, and a threaded self-locking structure is adopted between the threaded shaft and the internal threads of the contact pin, so that the contact pin has a threaded self-locking characteristic.
The upper end face of the contact pin main body abuts against the upper limit of the square groove to limit the linear motion of the contact pin, and the lower end face of the contact pin main body abuts against the upper end face of the rotator to limit the lower limit of the linear motion of the contact pin.
The beneficial effects of the invention are mainly as follows:
(1) The invention adopts the thread self-locking structure, thereby increasing the reliability and stability of the machine in operation, ensuring the consistency of the height of the protrusions of the braille points, reducing the power consumption to a great extent, realizing large-area and dense braille lattice arrangement and providing hardware support for braille and graphic touch display.
(2) The invention designs a single-point driving unit according to the ampere force generation principle, and can drive a braille contact to move up and down. The single-point driving unit has the characteristics of simple mechanism, small volume, high response speed and the like.
Drawings
FIG. 1 is an overall external view of the structure of the device of the present invention.
Fig. 2 is an internal assembly view of the structure of the device of the present invention.
Figure 3 is a cross-sectional view of the structure of the device of the present invention.
Fig. 4 is a schematic diagram of a single-point driving unit structure according to the present invention.
Fig. 5 is a schematic diagram of the structure of the center pin and the edge pin of the base of the present invention.
Fig. 6 is a schematic view of the structure of the stylus of the present invention.
Fig. 7 is a schematic view of the structure of the rotary body of the present invention.
Fig. 8 is a schematic view of the structure of the base plate of the present invention.
FIG. 9 is a schematic diagram of a touch panel structure of the present invention.
In the figure: the touch panel 10, the middle sheet 20, the bottom plate 30, the single-point driving unit 40, the stylus 50, the rotator 60, the permanent magnet 70, the base 80, the base edge pin 90, the base center pin 100, the touch panel lower end face 101, the positioning hole 102, the square groove top face 103, the touch panel pin shaft hole 104, the square groove 105, the bottom plate upper end face 301, the bottom plate groove 302, the bottom plate pin shaft hole 303, the bottom plate center pin 304, the bottom plate edge pin 305, the stylus round shaft 501, the stylus body upper end face 502, the stylus body 503, the stylus internal thread 504, the stylus body lower end face 505, the thread shaft 601, the rotator upper end face 602, and the rotator bottom square groove 603.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
As shown in fig. 1, the invention comprises a bottom plate 30, a middle plate 20 and a touch plate 10, wherein the touch plate 10, the middle plate 20 and the bottom plate 30 are sequentially connected from top to bottom through pin shafts, the pin shafts sequentially pass through a touch plate pin shaft hole 104, a middle plate pin shaft hole and a bottom plate pin shaft hole 303, and a touch plate lower end face 101, the middle plate 20 and a bottom plate upper end face 301 jointly enclose a hollow space for installing a single-point driving unit 40.
As shown in fig. 2, the present invention further includes eight single-point driving units 40, and the eight single-point driving units 40 are distributed in a 2×4 array, i.e. a "square" in the braille display, and displays with different sizes can be randomly combined by taking a "square" as a unit to form eight-point braille touch. The upper and lower ends of the eight single-point driving units 40 protrude from the touch panel 10 and the bottom plate 30, respectively.
As shown in fig. 4 and 7, the single-point driving unit 40 includes a stylus 50, a rotating body 60, a permanent magnet 70 and a base 80, the base 80 is fixed in a bottom plate groove 302 provided on an upper end surface of the bottom plate 30, a central groove is provided on a top surface of the base 80, a square bump provided on an upper end of the permanent magnet 70 is inserted into a square groove 603 provided on a lower end of the rotating body 60, a threaded shaft 601 is provided on an upper end surface of the rotating body 60, a threaded shaft 601 is sleeved in a cavity provided on a lower portion of the stylus 50 and connected with the threaded shaft 601 through threads, and a round shaft 501 on an upper end of the stylus 50 is movably disposed in the square groove of the touch pad 10.
As shown in fig. 3 and 5, the top surface of the base 80 is provided with a central groove, a through hole with a base central pin 100 is arranged in the middle of the bottom of the central groove, a circle of annular metal sheets are arranged on the top surface of the base 80 around the central groove, and the annular metal sheets are connected with one end of a base edge pin 90 arranged in the base 80 around the central groove; the permanent magnet 70 is embedded in the central groove of the base 80, and a core bar arranged at the lower end of the permanent magnet 70 is inserted into a positioning hole arranged at one end of a central pin 100 of the base; the other end of the base edge pin 90 and the other end of the base center pin 100 are respectively penetrated through the base 80 and the bottom plate 30 and connected to an external driving circuit.
As shown in fig. 6, the stylus 50 is mainly composed of a stylus body 503 and a stylus circular shaft 501 positioned on the upper end surface of the stylus body 503; the stylus circular shaft 501 is mounted in clearance fit with the locating hole of the touch pad, and the stylus body 503 is mounted in clearance fit with the square groove 105 to limit the circumferential rotation movement of the stylus 50.
As shown in fig. 5 and 6, the upper end surface 502 of the stylus body abuts against the upper limit of the square groove top surface 103 to limit the linear motion of the stylus 50, and the lower end surface 505 of the stylus body abuts against the lower limit of the upper end surface 602 of the rotator to limit the linear motion of the stylus 50.
As shown in fig. 8, the bottom surface of the bottom plate groove 302 is provided with edge pin holes 305 and center pin holes 304 corresponding to the eight single-point driving units 40, and each bottom plate center pin hole 304 is located at the same axis as the positioning hole 102 of the touch panel. The lower ends of the base edge pins 90 and the base center pins 100 of each single-point driving unit 40 respectively pass through the edge pin holes 305 and the center pin holes 304 of the bottom plate 30 and penetrate out of the lower bottom surface of the bottom plate 30.
As shown in fig. 9, a mounting through hole for being mounted in cooperation with the contact pins 50 of the eight single-point driving units 40 is formed in the middle of the touch panel, and the mounting through hole mainly comprises a square groove 105 and a positioning hole 102 positioned on the upper end surface of the square groove 105 in a butt joint manner.
In particular, the single-side braille structure comprises eight braille points, namely a "square" formed by eight single-point driving units distributed in 2×4, wherein the braille points are convex when the single-point driving unit 40 is in the working position, and the braille points are concave when the single-point driving unit 40 is in the non-working position, and braille characters can be arranged by controlling the concave-convex of each point. By controlling the direction of the current flow in and out of the base center pin 100 and the base edge pin 90, opposing ampere forces can be generated, and the permanent magnet 70 can be positively and negatively rotated, so that both upward and downward movements of the stylus 50 can be achieved.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Taking one single-point driving unit 40 as an example, when current flows in from the base center pin 100, and flows out from the base edge pin 90 through conduction of the permanent magnet 70, because the upper end of the permanent magnet 70 is N-pole and the lower end is S-pole, the magnetic induction line direction inside the permanent magnet 70 is vertically upward, according to the left hand rule, at this time, the edge points of the lower end face of the permanent magnet 70 are all subjected to tangential ampere force, the permanent magnet 70 is integrally subjected to ampere force in the clockwise direction (from top to bottom view), the permanent magnet 70 is driven to rotate in the clockwise direction, so that the rotating body 60 is driven to rotate in the clockwise direction, and because the threaded shaft 601 of the rotating body 60 adopts right-handed threads, the rotation of the threaded shaft 601 drives the contact pin 50 to move upward, and when the upper end face 502 of the contact pin contacts the square groove top surface 103 of the touch pad, the upper limit stroke is reached, namely the protruding state. Similarly, when current flows from the base edge pin 90 and flows out of the base center pin 100 through the permanent magnet 70, the permanent magnet 70 receives an ampere force in the counterclockwise direction, and at this time, the stylus 50 moves downward, and reaches the stroke lower limit, i.e., the depressed state, when the stylus lower end surface 505 contacts the rotator upper end surface 602. This is a complete working cycle of the braille points, and as shown in fig. 3, the single-point driving units 40 of left 1 and left 3 represent the working states of the single-point driving units 40, and the single-point driving units 40 of left 2 and left 4 represent the non-working states of the single-point driving units 40.
Therefore, the invention can realize the up-and-down movement of the braille points and has the self-locking function, greatly reduces the power consumption, can realize large-area and dense braille lattice arrangement, and provides hardware support for braille and graphic touch display.
Claims (8)
1. A touch reproduction rotary self-locking braille lattice display device is characterized in that: the touch panel comprises a bottom plate (30), a middle layer plate (20), a touch panel (10) and a single-point driving unit (40), wherein the touch panel (10), the middle layer plate (20) and the bottom plate (30) are sequentially connected from top to bottom through pin shafts penetrating through pin shaft holes, the touch panel (10), the middle layer plate (20) and the bottom plate (30) jointly enclose a hollow space for installing the single-point driving unit (40), and the upper end and the lower end of the single-point driving unit (40) extend out of the touch panel (10) and the bottom plate (30) respectively;
the single-point driving unit (40) comprises a contact pin (50), a rotating body (60), a permanent magnet (70) and a base (80), wherein the base (80) is fixed in a base plate groove (302) formed in the upper end face of the base plate (30), the top surface of the base (80) is provided with a central groove, a through hole for containing a base central pin (100) is formed in the middle of the bottom of the central groove, a circle of annular metal sheet is arranged on the top surface of the base (80) around the central groove, and the annular metal sheet is connected with one end of a base edge pin (90) arranged in the base (80) around the central groove; the permanent magnet (70) is embedded in a central groove of the base (80), and a core bar arranged at the lower end of the permanent magnet (70) is inserted into a positioning hole arranged at one end of a central pin (100) of the base; the other end of the base edge pin (90) and the other end of the base center pin (100) are respectively penetrated through the base (80) and the bottom plate (30) and are connected to an external driving circuit; square bumps arranged at the upper end of the permanent magnets (70) are inserted into square grooves (603) at the bottom of a rotating body (60), threaded shafts (601) are arranged on the upper end face of the rotating body (60), the cavities arranged at the lower parts of the contact pins (50) are sleeved with the threaded shafts (601) and connected with the threaded shafts (601) through threads, and round contact pin shafts (501) at the upper ends of the contact pins (50) are movably arranged in the square grooves of the touch pad (10);
the single-point driving units (40) are connected with a control circuit board, the control circuit board controls current to flow in from a base edge pin (90) and flow out from a base center pin (100) through the permanent magnet (70), or controls current to flow in from the base center pin (100) and flow out from the base edge pin (90) through the permanent magnet (70), and the current is mutually perpendicular to an inherent axial magnetic field in the permanent magnet (70) so that tangential ampere force is generated at the edge of the permanent magnet (70), and the permanent magnet (70) is driven to axially rotate, so that the rotating body (60) is driven to rotate.
2. The tactile-reproduction rotary self-locking braille lattice display device of claim 1, wherein: the touch control device comprises eight single-point driving units (40), wherein the eight single-point driving units (40) are distributed in a 2 x 4 array to form eight-point braille touch control.
3. A tactile reproduction rotary self-locking braille lattice display device according to claim 2, characterized in that: the middle of the touch pad is provided with a mounting through hole which is matched and mounted with contact pins (50) of eight single-point driving units (40), and the mounting through hole mainly comprises a square groove (105) and a positioning hole positioned on the upper end surface of the square groove (105) in a butt joint manner; the contact pin (50) mainly comprises a contact pin main body (503) and a contact pin circular shaft (501) positioned on the upper end surface of the contact pin main body (503); a stylus circular shaft (501) is in clearance fit with a positioning hole of the touch pad, and a stylus main body (503) is in clearance fit with the square groove (105) to limit circumferential rotation movement of the stylus (50).
4. A tactile reproduction rotary self-locking braille lattice display device according to claim 2, characterized in that: the bottom surface of the groove of the bottom plate (30) is provided with edge pin holes (305) and center pin holes (304) corresponding to the eight single-point driving units (40), and each bottom plate center pin hole (304) and the positioning hole (102) of the touch pad are located at the same axis.
5. The tactile-reproduction rotary self-locking braille lattice display device of claim 4, wherein: the lower ends of the base edge pins (90) and the base center pins (100) of each single-point driving unit (40) respectively pass through the edge pin holes (305) and the center pin holes (304) of the bottom plate (30) to penetrate out of the lower bottom surface of the bottom plate (30).
6. The tactile-reproduction rotary self-locking braille lattice display device of claim 1, wherein: the permanent magnet (70) is electrically conductive.
7. The tactile-reproduction rotary self-locking braille lattice display device of claim 1, wherein: the contact pin (50) is in threaded fit with the rotating body (60), so that the rotating motion of the rotating body (60) is converted into vertical linear motion of the contact pin (50), and a threaded self-locking structure is adopted between the threaded shaft (601) and the internal threads (504) of the contact pin.
8. A tactile-reproduction rotary self-locking braille lattice display device according to claim 3, characterized in that: the upper end face of the contact pin main body (503) abuts against the upper limit of the square groove top face (103) for limiting the linear motion of the contact pin (50), and the lower end face of the contact pin main body (503) abuts against the lower limit of the upper end face (602) of the rotator for limiting the linear motion of the contact pin (50).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910045386.0A CN110033674B (en) | 2019-01-17 | 2019-01-17 | Touch sense reproduction rotary self-locking braille lattice display device |
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| CN201910045386.0A CN110033674B (en) | 2019-01-17 | 2019-01-17 | Touch sense reproduction rotary self-locking braille lattice display device |
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| CN110033674B true CN110033674B (en) | 2024-02-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402686B (en) * | 2020-05-09 | 2022-09-20 | 长春大学 | Cam piston type braille point display |
| CN111697754B (en) * | 2020-06-03 | 2021-10-29 | 清华大学 | Touch display and terminal device |
| CN111752408B (en) * | 2020-06-03 | 2022-01-07 | 清华大学 | Tactile display device |
| CN113327489A (en) * | 2021-06-03 | 2021-08-31 | 西安工业大学 | Layered mechanical intelligent braille reader based on machine vision |
| CN115171485B (en) * | 2022-08-04 | 2023-05-23 | 南京信息工程大学 | Electromagnetic driving braille display device |
| CN116719443B (en) * | 2023-08-02 | 2023-10-27 | 中清思源科技(北京)有限公司 | Touch display device |
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