CN109192008B - Low-energy-consumption electromagnetic pull rod type braille dot display module - Google Patents
Low-energy-consumption electromagnetic pull rod type braille dot display module Download PDFInfo
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- CN109192008B CN109192008B CN201811196457.9A CN201811196457A CN109192008B CN 109192008 B CN109192008 B CN 109192008B CN 201811196457 A CN201811196457 A CN 201811196457A CN 109192008 B CN109192008 B CN 109192008B
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- 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
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Abstract
A low-energy-consumption electromagnetic pull rod type Braille point display module comprises a main body, thimbles, actuating rods and actuators, wherein the main body is at least provided with thimble mounting holes with square Braille quantity, the actuating rods with the same quantity as the rows of thimbles are arranged below each row of thimbles, and the lower ends of the thimbles are always in contact with the curve profile of one side end part of the corresponding actuating rod; the main part is also provided with actuating rod mounting holes the same in number as the thimble mounting holes, each actuating rod mounting hole is arranged on the side face of the main part, each actuating rod mounting hole is communicated with the corresponding thimble mounting hole, the central line of each actuating rod mounting hole is perpendicular to the central line of the corresponding thimble mounting hole, each actuating rod is driven by one actuator, and each actuating rod uniquely controls the lifting motion of one thimble corresponding to the actuating rod. The invention provides a low-energy-consumption electromagnetic pull rod type Braille point display module which is suitable for generating Braille characters of all languages and all forms.
Description
Technical Field
The invention relates to the technical field of mechanical engineering and electronic engineering, in particular to a low-energy-consumption electromagnetic pull rod type braille dot display module.
Background
According to the statistical data of the World Health Organization (WHO) in 2010, about 3900 million blind people exist in the world, most blind people live in low-income and middle-income countries, the Chinese blind people are the top of the world, more than 600 million blind people exist in 2012, and the number of the Chinese blind people is greatly increased in 2020. Therefore, for such a large and important group of blind people, the society needs to give care and support to them, and at the same time, they also urgently need to get a good learning environment and cultural education.
The blind people can not study and read like ordinary people, the reading modes of the blind people comprise auditory reading and touch reading, the touch reading by fingers has high reading speed and good information discrimination, is a course which needs to be taught by a blind school, is one of the fields which need to be mastered for the blind people to communicate with the outside and interpersonal, and is a main way for the blind people to acquire knowledge and information at the present stage.
The Braille book is a main publication for the blind to appreciate and read, but the number is small, the manufacturing period is long, special paper is expensive, the working procedures are various and complex, the manufacturing time is long, and the general blind books need to be subjected to the manufacturing steps of translation, proofreading, template manufacturing, printing, arrangement, binding and the like, so that the Braille book is high in price, lagged in information, small in information quantity, heavy in size and extremely inconvenient to carry. With the progress of society and the development of science and technology, the reading and learning convenience of the blind is improved, and the blind is more and more emphasized by developed countries in the world, and various reading devices for the blind are continuously appeared.
The braille is the literal character specially for blind people to read and write, and the braille book and braille reading device are the displaying carrier of braille. The earliest characters which can be read by the blind in the world were invented by Francisco Lucas, Spain in 1517, but the characters only solve the reading problem, do not solve the writing problem, and are not used for a long time. The characters commonly used by Braille all over the world are born in 1824, and are a Braille character system which is created by the law, Louis Braille (Louis Braille) and inspired by night texts, and the Chinese also has the Braille national standard (GB/T15720-2008). The Braille contact driving mechanism is an important component of a Braille reading device, researchers at home and abroad research and develop Braille contact driving mechanisms in different driving forms based on different principles, and the Braille contact driving mechanisms mainly comprise driving modes such as piezoelectric ceramics, electric stimulation, memory alloy, pneumatics, temperature control, electromagnetism and other novel materials, wherein the piezoelectric ceramics type Braille point displayer is based on vibration stimulation, the electric stimulation type Braille point displayer is based on current stimulation, the temperature control type Braille point displayer is based on temperature stimulation, and the memory alloy type Braille type, pneumatic type and electromagnetic type are based on pressure stimulation.
Although scholars at home and abroad develop Braille point display devices in various driving modes, the Braille point display driving mechanism which is successfully applied at present only has a piezoelectric ceramic type and an electromagnetic type. In 1979, Telesensory Systems, usa, developed a dynamic braille display electronic device (VersaBraille) that uses a piezoelectric ceramic bimorph and an "L" type cantilever beam structure as a bump driving mechanism to form refreshable braille characters. After that, the companies of japan and germany have developed 20-square, 40-square braille display devices using piezoelectric ceramic sheets, and have continuously optimized structures, so that the performance of the piezoelectric ceramic sheets is more stable, and the piezoelectric ceramic type braille dot display device has low power consumption, fast refresh speed, light weight, and can provide a larger supporting force, but has disadvantages: the production and processing technology is complicated, the manufacturing cost of parts is high, and the popularization of the piezoelectric ceramic type braille dot displayer is limited. The electromagnetic braille point display mainly utilizes the characteristics that an electromagnetic coil generates a magnetic field when being electrified and disappears when the magnetic field is cut off, and drives the braille contact to bulge and descend to form braille characters. In the beginning of the 20 th century, Fung-Huei Yeh et al of mechanical and electromechanical engineering systems of the university of Yangtze river in Taiwan, China developed an electromagnetic braille dot display device, and since an electromagnetic braille contact driving mechanism has the advantages of high refreshing frequency, high reliability, low price, convenience in manufacturing and maintenance, capability of providing large supporting force and the like, continuous research is conducted in some countries such as Korea and China, but the whole device has high current demand and high power consumption, needs to be additionally provided with a cooling device, and has a large volume.
Disclosure of Invention
In order to overcome the defects of the existing Braille contact driving mechanism, the invention provides the low-energy-consumption electromagnetic pull rod type Braille point display module which is suitable for generating Braille characters of all languages and all forms.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a low-energy-consumption electromagnetic pull rod type Braille point display module comprises a main body, thimbles, actuating rods and actuators, wherein the main body is at least provided with a thimble mounting hole with a square Braille contact quantity, the square Braille contact quantity is one square, the square Braille contact quantity is four lines or two lines or three lines or two lines or six Braille contacts, the number of the thimbles is the same as that of the thimble mounting holes, the thimbles are respectively mounted in the corresponding thimble mounting holes in a one-to-one correspondence manner, and each thimble is in clearance fit with the thimble mounting holes; the thimble structure comprises a main body and a plurality of actuating rod mounting holes, wherein the main body is provided with actuating rod mounting holes, the number of the actuating rod mounting holes is the same as that of the thimble mounting holes, each actuating rod mounting hole is arranged on the side surface of the main body and is communicated with the corresponding thimble mounting hole, the center line of each actuating rod mounting hole is perpendicular to the center line of the corresponding thimble mounting hole, actuating rods with the same number as that of the rows of thimbles are arranged below each row of thimbles, each actuating rod comprises a curved surface contour used for enabling the thimbles to be located at a bottom dead center and driving the thimbles to move from the bottom dead center to the top dead center and a rod body used for enabling the thimbles to be located at the top; the actuating rod below each thimble can be arranged in the corresponding actuating rod mounting hole in a back-and-forth movement manner, each actuating rod is driven by one actuator, and each actuating rod uniquely controls the lifting movement of the corresponding thimble;
the central line of the actuating rod mounting holes and the plane where the central line of each row of thimbles is positioned form an oblique angle of 45 degrees, the actuating rod mounting holes in each row are mutually parallel, and when the main body is provided with more than two square Braille contacts, every two adjacent rows of actuating rod mounting holes are crossed and arranged in a staggered manner;
the outermost end of each actuating rod mounting hole is in a boss shape, the outermost surface of each boss is flush with the side face of the main body, the bosses at the actuating rod mounting holes in each row are arranged in a zigzag manner, a right-angled triangular groove is formed between every two adjacent bosses, and the bosses limit the push-pull action of the actuating rods;
when the actuating rod moves back and forth in the actuating rod mounting hole, the ejector pin is driven to lift in the corresponding ejector pin mounting hole, when the bottom of the ejector pin completely enters the containing area of the curved surface contour, the ejector pin is positioned at a bottom dead center, and when the bottom of the ejector pin leaves the containing area of the curved surface contour and moves to the rod body, the ejector pin is positioned at a top dead center; when the thimble is positioned at the lower dead point, the upper end surface of the thimble is flush with the upper plane of the main body to form a 'flat point' of the Braille character, when the thimble is positioned at the upper dead point, the upper end surface of the thimble is higher than the upper plane of the main body to form a 'convex point' of the Braille character, and the maximum lift of the thimble is equal to the height of the 'convex point' of the Braille character;
all the actuating rods corresponding to each row of thimbles can be arranged on the same side of the main body or can be respectively arranged on the front side and the rear side of the main body, each actuating rod can be independently pushed and pulled back and forth in each actuating rod mounting hole, each actuating rod is provided with two stop positions, the actuating rods must stop at one of the stop positions after each pushing and pulling action is finished, when the actuating rods are at one of the stop positions, if the thimbles on the actuating rods are positioned in the curved surface contour of the end part of the actuating rods, the thimbles on the actuating rods must leave the curved surface contour of the end part of the actuating rods when the actuating rods are at the other stop position; when the ejector pin is positioned in the curved surface contour of the end part of the actuating rod, the ejector pin is positioned at the lower dead point; when the ejector pins leave the curved surface contour of the end part of the actuating rod and move to the rod body, the ejector pins are positioned at an upper stop point, and when each ejector pin is positioned at the position of the upper stop point or the lower stop point under the action of the actuating rod, a required Braille contact array is generated;
the actuating rod further comprises a small shaft neck, and the curved surface contour and the small shaft neck are respectively arranged at the front end and the rear end of the rod body;
the other end of each actuating rod is connected with a permanent magnet, the magnetic pole of one side of the permanent magnet points to the outside, and the permanent magnet can be directly connected to the end face of the actuating rod or can be wrapped in an enveloping frame for magnetic isolation and then assembled with the actuating rod; the outer diameter of the enveloping frame is larger than the inner diameter of the actuating rod mounting hole;
the actuator is composed of a solenoid and a semi-hard magnetic core shaft inside the solenoid, the solenoid is installed at one end of the semi-hard magnetic core shaft, the excitation direction of the semi-hard magnetic core shaft is changed by controlling the direct current applied to the solenoid in the positive direction and the negative direction, and the solenoid and a permanent magnet at the end of the actuating rod act to realize the push-pull action of the actuating rod.
And when the curved surface profile is vertically sectioned along the central line at the working position, the profile is in one or a combination of two of an oblique straight line, an arc line, a sine line and an involute.
Furthermore, for the braille display module with eight points per square, the number of thimbles per square is eight, the number of corresponding actuating rods is eight, when a group of actuating rods corresponding to the thimbles per square is arranged on the front side and the rear side of the main body, four actuating rods are respectively arranged on each side of the main body, the four actuating rods on each side are respectively responsible for driving four thimbles close to the side, the four actuating rods on each side are arranged into four rows in the up-down direction, wherein two actuating rods on the upper side drive two thimbles on the outer side, and two actuating rods on the lower side drive two thimbles on the inner side; namely, the actuating rod drives the thimble, the actuating rod 73 drives the thimble, the actuating rod drives the thimble, and the rest actuating rods drive the thimble according to the rule; when a group of actuating rods corresponding to each square thimble is arranged on one side of the main body, eight actuating rods on each side are arranged in eight rows in the vertical direction and respectively drive eight thimbles on each side;
for the six-point Braille display module, the number of the thimbles in each square is six, and the number of the corresponding actuating rods is six; two and four or three and three actuating rods are respectively arranged at the front side and the rear side of the main body, and the driving mode of the actuating rods is the same as that of an eight-point Braille display module; the six actuating rods of each square of the six-point Braille display module can be arranged on the same side of the main body, the actuating rods on the same side of the main body are arranged in a mode corresponding to the actuating rod mounting holes, the central lines of the actuating rods in each row are parallel, and the central lines of the actuating rods in adjacent rows are crossed.
Furthermore, the thimble mounting hole is in a step shape with a thin upper part and a thick lower part, the thin hole at the upper part is in a circular shape, and the thick hole at the lower part is in a circular or square shape;
the thimble sequentially comprises a top part, a head part, a body part, a tail part and a bottom part from top to bottom, and the top part of the thimble adopts the outline shape of a hemispherical or parabolic rotating curved surface and is used for the touch of the fingers of the blind; the head part of the thimble is cylindrical and can move up and down in a thinner hole at the upper part of the thimble mounting hole, and the body part of the thimble adopts a cylindrical structure or a cuboid structure and is matched with a thicker hole at the lower part of the thimble mounting hole to play a role in guiding; the tail part of the thimble is cylindrical and is positioned in a thicker hole at the lower part of the thimble mounting hole; the bottom of the thimble adopts a semi-sphere or cylinder structure which is convenient to be matched with the curved surface profile of the end part of the actuating rod.
Furthermore, the enveloping frame is annular, one end of the enveloping frame is provided with a small-diameter hole, the small-diameter hole is sleeved on a small shaft neck of the actuating rod and is fixedly connected with the small shaft neck, the other end of the enveloping frame is provided with a large-diameter hole, and a permanent magnet is arranged in the large-diameter hole;
the front side and the rear side of the main body are respectively provided with a magnetic conductive clapboard for reducing the magnetic field influence and the magnetic dispersion between the solenoids.
Furthermore, the front side and the rear side of the main body are respectively provided with a mounting bracket, the mounting brackets are positioned on the outer sides of the magnetic conductive partition plates, one side of each mounting bracket, which faces the magnetic conductive partition plate, is provided with a mounting hole, and the other end of the semi-hard magnetic core shaft of the actuator is mounted in the mounting hole of the mounting bracket; the shape of the side surface of the mounting bracket facing one side of the magnetic conduction partition plate is matched with the shape of the corresponding side surface of the magnetic conduction partition plate, and the mounting bracket and the magnetic conduction partition plate are buckled together.
When one square of the Braille characters is formed by arranging eight Braille contacts formed when four rows and two columns of eight thimbles are respectively positioned at an upper stop point or a lower stop point, four actuating rods are arranged below each column of the thimbles, 16 lifting arrangements of the column of the thimbles can be completed by the push-pull action of the four actuating rods in a matching way, namely 16 convex and flat arrangement modes of the column of the Braille contacts are realized, and all 256 different arrangement modes of one square of the Braille contacts can be completed by the two adjacent columns of the thimbles under the mutual matching of the push-pull action of the actuating rods.
When one square of the Braille characters is formed by arranging six Braille contacts formed when the top dead point or the bottom dead point is separated by six thimbles in three rows and two columns, three actuating rods are arranged below each row of thimbles, the push-pull action of the three actuating rods is matched to finish 8 lifting arrangements of the row of thimbles, namely 8 convex and flat arrangement modes of the row of Braille contacts are realized, and all 64 different arrangement modes of one square of the Braille contacts can be finished by the two adjacent rows of thimbles under the mutual matching of the push-pull action of the actuating rods.
The invention can realize the square display of the braille, and can also realize the multi-square display or multi-row display by expanding the braille.
The invention has the following beneficial effects: the device adopts the actuator to realize the push-and-pull action to making the actuating rod to drive thimble up-and-down motion and form the different arrays of braille contact, breaks down the power supply to the actuator coil after the braille array refreshes each time, and because the magnetic core axle still keeps the magnetization state after the actuator coil cuts down the power supply, has guaranteed that the action that makes actuating rod drive thimble maintains unchangeably. The power consumption is small, the cost is low, the execution speed is high, the braille reader or the braille point display is easy to popularize, and the social benefit and the application value are good.
Drawings
FIG. 1 is a schematic view of a two-dimensional assembly of an eight-dot Braille display module.
FIG. 2 is a view showing the positional relationship of the touch actuator, the actuating rod, the permanent magnet and the main body.
Fig. 3 is a structural view of the main body.
Fig. 4 is a structural view of the thimble.
Fig. 5 is a structural view of the actuating rod.
Fig. 6 is a structural view of another actuator lever.
Fig. 7 is a structural view of the magnetically conductive ring.
Fig. 8 is a schematic view of another direction of fig. 7.
Fig. 9 is a structural view of the mounting bracket.
Fig. 10 is a structural view of a spindle of the actuator.
Fig. 11 is a schematic structural view of a magnetically conductive spacer.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 11, a low power consumption electromagnetic pull rod type braille point display module includes a main body 1, an ejector pin 2, an actuating rod and an actuator 3, the main body 1 is at least provided with an ejector pin mounting hole 101 of one square braille contact number, the one square braille contact is composed of eight braille contacts (hereinafter, eight braille) in four lines and two lines or six braille contacts (hereinafter, six braille) in three lines and two lines, the arrangement mode of the braille contacts is the same, and the ejector pin mounting hole is also arranged in parallel in the up-down direction in two lines or three lines. The number of the thimbles 2 is the same as that of the thimble mounting holes 101, the thimbles are respectively mounted in the corresponding thimble mounting holes in a one-to-one correspondence manner, and each thimble 2 is in clearance fit with the thimble mounting hole 101; an actuating rod 7 with the same number as the rows of thimbles is arranged below each row of thimbles 2, each actuating rod 7 comprises a curved surface contour 701 and a rod body 702, wherein the thimbles are positioned at a lower dead center and drive the thimbles to move from the lower dead center to an upper dead center, the rod body is used for the thimbles to be positioned at the upper dead centers and matched with an actuating rod mounting hole, each actuating rod 7 is responsible for jacking one thimble 2, and the bottom of each thimble 2 is always in contact with the actuating rod 7; the main body 1 is further provided with actuating rod mounting holes 102 the number of which is the same as that of the thimble mounting holes, each actuating rod mounting hole 102 is formed in the side face of the main body 1, each actuating rod mounting hole 102 is communicated with the corresponding thimble mounting hole, the center line of each actuating rod mounting hole 102 is perpendicular to the center line of the corresponding thimble mounting hole, an actuating rod is installed in each actuating rod mounting hole, the actuating rods are in clearance fit with the actuating rod mounting holes 102, the actuating rods 7 below each thimble 2 can be installed in the corresponding actuating rod mounting holes 102 in a back-and-forth moving manner, each actuating rod 7 is driven by one actuator 3, and each actuating rod uniquely controls the lifting motion of the corresponding thimble 2;
the central line of the actuating rod mounting holes 102 and the plane where the central line of each row of thimbles is positioned form an oblique angle of 45 degrees, the actuating rod mounting holes 102 in each row are parallel to each other, and when the main body is provided with more than two square Braille contacts, the actuating rod mounting holes in every two adjacent rows are crossed and arranged in a staggered manner;
the outermost end of each actuating rod mounting hole 102 is in a boss shape, the outermost surface of each boss 103 is flush with the side surface of the main body, the bosses 103 at the actuating rod mounting holes in each row are arranged in a zigzag manner, a right-angled triangular groove 104 is formed between every two adjacent bosses, and the bosses 103 limit the push-pull action of the actuating rods;
when the actuating rod moves back and forth in the actuating rod mounting hole 102, the ejector pin 2 is driven to lift in the corresponding ejector pin mounting hole 101, when the bottom of the ejector pin 2 completely enters the containing area of the curved surface contour 701 of the actuating rod, the ejector pin 2 is at a bottom dead center, and when the bottom of the ejector pin 2 leaves the containing area of the curved surface contour 701 and moves to the rod body 702, the ejector pin 2 is at a top dead center; when the thimble 2 is positioned at the lower dead point, the upper end surface of the thimble 2 is flush with the upper plane of the main body 1 to form a 'flat point' of the Braille character, when the thimble 2 is positioned at the upper dead point, the upper end surface of the thimble 2 is higher than the upper plane of the main body 1 to form a 'convex point' of the Braille character, and the maximum lift of the thimble 2 is equal to the height of the 'convex point' of the Braille character;
the actuating rod mounting holes 102 of the main body 1 are disposed at one side or both sides of the main body 1 for mounting the actuating rods 7, and fig. 3 shows a case where the eight-dot braille display module is provided with the actuating rod mounting holes at both sides of the main body, respectively. All the actuating rods corresponding to each row of thimbles 2 can be arranged on the same side of the main body 1 or on the front side and the rear side of the main body 1, each actuating rod can be independently pushed and pulled back and forth in each actuating rod mounting hole 102, each actuating rod is provided with two stop positions, the actuating rod 7 must stop at one of the stop positions after each pushing and pulling action is finished, when the actuating rod is at one of the stop positions, if the thimble 2 on the actuating rod is positioned in the curved contour 701 of the end part of the actuating rod, the thimble 2 on the actuating rod must leave the curved contour 701 of the end part of the actuating rod when the actuating rod is positioned at the other stop position, when the thimble 2 is positioned in the curved contour 701 of the end part of the actuating rod, the thimble 2 is positioned at the bottom dead point, the upper end part of the thimble is flush with the upper surface of the main body 1 to form a 'flat point' of a character, when the thimble 2 leaves, the thimble 2 is in the top dead center, and thimble 2 upper end is higher than main part 1 upper surface, forms a "bump" of braille character, when some demonstration module work, all is in the position of top dead center or lower dead center under the effect of acting as the pole as every thimble 2 to generate required braille contact array.
Further, the actuating rod further includes a small journal 703, as shown in fig. 5, the rod body 702 is a part matched with the actuating rod mounting hole 102, and is designed into a cylinder, and may also be designed into other shapes such as a rectangular body, when the rod body 702 is a cylinder, the actuating rod can rotate in the mounting hole 102, the curved surface contour 701 of the end of the actuating rod for driving the thimble 2 is designed into a revolving body, the revolving axis of the revolving body coincides with the axis of the rod body 702, and it is ensured that the contact state of the curved surface contour 701 and the bottom of the thimble does not change along with the rotation of the actuating rod; when the rod body 702 of the actuating rod is rectangular, the actuating rod cannot rotate in the mounting hole 102, and the curved surface profile 701 of the end of the actuating rod for driving the thimble 2 is designed to be a non-rotating curved surface. In this embodiment, the curved surface profile 701 is a curved surface of revolution, and includes a small cylinder, a curved surface of revolution and a conical surface, when the thimble is at the bottom dead center, the center line of the thimble passes through the intersection point of the small cylinder and the curved surface of revolution, and when the thimble is vertically sectioned along the center line in the working position, the profile is in the shape of an oblique straight line, an arc line, a horizontal straight line, or an involute, a sine line, a parabola or the like, so as to minimize the resistance of pushing and pulling the actuating rod. Fig. 6 is another design of the actuating rod, which has the same working principle and contour shape as fig. 5, except that a short column structure is arranged at the front end of the curved contour, and the short column structure, the curved contour and the rod body form a dumbbell-shaped structure.
Further, as for the braille display module with eight points per square, as shown in fig. 2, the number of the thimbles per square is eight, the number of the corresponding actuating rods is eight, when a group of actuating rods corresponding to each square thimble is arranged on the front side and the rear side of the main body, four actuating rods are respectively arranged on each side of the main body, the four actuating rods on each side are respectively responsible for driving four thimbles close to the side, the four actuating rods on each side are arranged into four rows in the up-down direction, wherein two actuating rods on the upper side drive two thimbles on the outer side, and two actuating rods on the lower side drive two thimbles on the inner side; namely, actuating rod 71 drives thimble 21, actuating rod 72 drives thimble 22, actuating rod 73 drives thimble 23, actuating rod 74 drives thimble 24, and the rest actuating rods drive the thimbles according to the rule. When a group of actuating rods corresponding to each square thimble is arranged on one side of the main body, eight actuating rods on each side are arranged in eight rows in the vertical direction and respectively drive eight thimbles on each side;
for the six-point Braille display module, the number of the thimbles in each square is six, and the number of the corresponding actuating rods is six; two and four or three and three actuating rods are respectively arranged on the front side and the rear side of the main body, and the mode of driving the thimble is the same as that of the eight-point Braille display module. Each square six actuating rods of the six-point Braille display module can also be arranged on the same side of the main body.
The actuating rods on the same side of the main body 1 are arranged in a mode corresponding to the actuating rod mounting holes 102, the central lines of the actuating rods in each row are parallel to each other, and the central lines of the actuating rods in adjacent rows are crossed.
Furthermore, the thimble mounting hole 101 is in a step shape with a thin upper part and a thick lower part, the thin hole at the upper part is in a circular shape, and the thick hole at the lower part is in a circular or square shape;
the thimble 2 sequentially comprises a top part 204, a head part 201, a body part 202, a tail part 203 and a bottom part 204 from top to bottom, wherein the top part 204 of the thimble adopts the outline shape of a hemispherical or parabolic rotating curved surface, is used for the touch of the fingers of the blind, and is preferably clear in touch feeling; the head part 201 of the thimble is cylindrical and can move up and down in a thinner hole at the upper part of the thimble mounting hole, and the body part 202 of the thimble adopts a cylindrical structure or a cuboid structure and is matched with a thicker hole at the lower part of the thimble mounting hole to play a role in guiding; the tail part 203 of the thimble is cylindrical and is positioned in a thicker hole at the lower part of the thimble mounting hole; the bottom 204 of the thimble is a hemispherical or cylindrical structure that is convenient to match with the curved surface profile of the end of the actuating rod, although other curved surface structures may be used.
The upper portion of the thimble mounting hole 101 is thin for limiting the thimble 2 in the thimble mounting hole 101 and preventing the thimble 2 from falling off from the upper side of the main body 1, and the lower portion of the thimble mounting hole 101 is thick for placing the body portion 202 of the thimble 2 and the tail portion 203 of the thimble and guiding the thimble 2. Each row of thimbles are arranged differently on one side or two sides of the main body according to the actuating rods, and the heights of the thimbles are different; the length of the actuating rod mounting hole and the actuating rod is different according to different arrangements of the actuating rod on the main body.
Still further, another end 703 of each actuating rod connects a permanent magnet, one side magnetic pole of the permanent magnet points to the outside, the permanent magnet can be joined directly on the end surface of actuating rod 7, can envelope in enveloping the frame 704 especially envelope in the frame of the magnetic conductive material to isolate magnetism and then assemble with actuating rod 7 together, said enveloping the frame 704 is designed into circular ring or square frame, play the role of magnetic conduction, said enveloping the frame and magnet 707 together fixedly connect with small journal 703 of actuating rod; in this embodiment, the enveloping frame 704 is designed in a circular ring shape, as shown in fig. 7 and 8, the permanent magnets are enveloped in a circular hole 706 of the enveloping frame 704, and a circular hole 705 of the enveloping frame 704 is fixed in combination with the small rod journal 703. Under the action of the actuator 3, the permanent magnet drives the actuating rod 7 to move back and forth in the actuating rod mounting hole 102 on the main body 1, so that the actuating rod 7 is pushed out or pulled back to realize two stop positions, and meanwhile, the outline size of the enveloping frame 704 of the permanent magnet 707 is larger than the aperture of the actuating rod mounting hole 102, and the limiting effect is achieved on the actuating rod 7. When the contour shape of the curved surface at the end part of the moving rod is a revolving body, the permanent magnet is designed into a cylinder, the magnet enveloping frame is designed into a circular ring body, when the contour shape of the curved surface at the end part of the moving rod is not the revolving body, the magnet can be designed into a cuboid, and the magnet enveloping frame is designed into a square frame.
The actuator 3 is composed of a solenoid and a semi-hard magnetic core shaft 301 inside the solenoid, as shown in fig. 2 and fig. 10, the magnetic field direction of the solenoid is changed by controlling the direct current applied to the solenoid in the positive and negative directions, the excitation direction of the semi-hard magnetic core shaft 301 is changed along with the change, and the actuation rod 7 is pushed and pulled by the repulsion or attraction effect formed between the actuation rod and the permanent magnet at the end part of the actuation rod. Mandrel 301 adopts half hard magnetic material in order to still can keep certain magnetic induction intensity when solenoid cuts off the power supply, and the design also can adopt soft magnetic material such as electrician's pure iron. The quantity of the actuators 3 is the same as that of the actuating rods 7, the actuators 3 are coaxially opposite to the actuating rods 7, the arrangement mode of the actuators is the same as that of the actuating rods 7, when the semi-hard magnetic core shaft 301 of the actuator interacts with the permanent magnet to enable the actuating rods 7 to be located at one of two stop positions, the ejector pins 2 fall back into the curved surface profile 701 at the end parts of the actuating rods 7 to reach a bottom dead center, and when the semi-hard magnetic core shaft 301 of the actuator interacts with the permanent magnet to enable the actuating rods 7 to be located at the other of the two stop positions, the actuating rods push the ejector pins 2 to move upwards to leave the curved surface profile 701 and move to the rod body 702 to the top dead center.
The actuators 3 and the actuating rods are the same in number and are coaxially opposite to the actuating rods respectively, a magnetic conductive partition plate 4 shown in fig. 11 can be arranged between the solenoids to reduce the mutual influence of magnetic fields between the solenoids and reduce magnetic dispersion, and the front side and the back side of the magnetic conductive partition plate 4 are structurally designed to be matched with the triangular groove shape 104 on the side surface of the main body 1. The actuator can also adopt other actuating devices such as an electric rod, an air cylinder, a hydraulic cylinder and the like.
Further, the actuator 3 is mounted on a mounting bracket 5, the side surface of the mounting bracket 5 is provided with mounting holes 501 corresponding to the permanent magnets at the end of the actuating rod in distance and direction, and the surface of the bracket on which the coil mandrel is mounted is in a triangular tooth shape, as shown in fig. 9, and is matched with the shape of the side surface of the main body 1. The semi-hard core shaft 302 of the actuator is fixed in the mounting hole 501 of the mounting bracket 5. A magnetically conductive spacer 4 may be provided between the mounting bracket 5 and the main body 1, the solenoids being spaced from each other by magnetically conductive plates 4 to reduce the mutual influence of the magnetic fields between the solenoids and to reduce stray magnetic fields. The solenoid 301 is mounted on the semi-hard magnetic mandrel 302 and fixed with a hole on the magnetic conductive partition plate 4 by using heat-resistant glue.
When one square of the Braille characters is formed by arranging eight Braille contacts formed when four rows and two columns of eight thimbles are respectively positioned at an upper stop point or a lower stop point, four actuating rods are arranged below each column of the thimbles, 16 lifting motions of the column of the thimbles can be completed by the push-pull action coordination of the four actuating rods, namely 16 convex-flat arrangement modes of the column of the Braille contacts are realized, and all 256 different arrangement modes of one square of the Braille contacts can be completed by the push-pull action coordination of two adjacent columns of the thimbles under the push-pull action coordination of the actuating rods.
When one square of the Braille characters is formed by arranging six Braille contacts formed when the top dead point or the bottom dead point is separated by six thimbles in three rows and two columns, three actuating rods are arranged below each row of thimbles, the 8 lifting motions of the row of thimbles can be completed by the push-pull action coordination of the three actuating rods, namely, 8 convex-flat arrangement modes of the row of Braille contacts are realized, and all 64 different arrangement modes of one square of the Braille contacts can be completed by the two adjacent rows of thimbles under the mutual coordination of the push-pull actions of the actuating rods.
The present embodiment has been described by way of example only of a single "square" display device of braille, and is not limited to a display device that is expanded to realize multiple "squares" or multiple "rows".
It should be noted that the two specific embodiments in this specification are only illustrative of the present invention and are not limited to the scope of the present invention, and any insubstantial changes or modifications are within the scope of the present invention.
Claims (6)
1. The utility model provides a low energy consumption electric magnetic pull rod formula braille point shows module which characterized in that: the blind-type braille contact device comprises a main body, thimbles, an actuating rod and an actuator, wherein the main body is at least provided with a thimble mounting hole with a square braille contact quantity, the square braille contact quantity is one square, the square braille contact quantity is four lines or two lines or three lines or two lines or six braille contacts, the number of the thimbles is the same as that of the thimble mounting holes, the thimbles are respectively mounted in the corresponding thimble mounting holes in a one-to-one correspondence manner, and each thimble is in clearance fit with the thimble mounting; the thimble structure comprises a main body and a plurality of actuating rod mounting holes, wherein the main body is provided with actuating rod mounting holes, the number of the actuating rod mounting holes is the same as that of the thimble mounting holes, each actuating rod mounting hole is arranged on the side surface of the main body and is communicated with the corresponding thimble mounting hole, the center line of each actuating rod mounting hole is perpendicular to the center line of the corresponding thimble mounting hole, actuating rods with the same number as that of the rows of thimbles are arranged below each row of thimbles, each actuating rod comprises a curved surface contour used for enabling the thimbles to be located at a bottom dead center and driving the thimbles to move from the bottom dead center to the top dead center and a rod body used for enabling the thimbles to be located at the top; the actuating rod below each thimble can be arranged in the corresponding actuating rod mounting hole in a back-and-forth movement manner, each actuating rod is driven by one actuator, and each actuating rod uniquely controls the lifting movement of the corresponding thimble;
the central line of the actuating rod mounting holes and the plane where the central line of each row of thimbles is positioned form an oblique angle of 45 degrees, the actuating rod mounting holes in each row are mutually parallel, and when the main body is provided with more than two square Braille contacts, every two adjacent rows of actuating rod mounting holes are crossed and arranged in a staggered manner;
the outermost end of each actuating rod mounting hole is in a boss shape, the outermost surface of each boss is flush with the side face of the main body, the bosses at the actuating rod mounting holes in each row are arranged in a zigzag manner, a right-angled triangular groove is formed between every two adjacent bosses, and the bosses limit the push-pull action of the actuating rods;
when the actuating rod moves back and forth in the actuating rod mounting hole, the ejector pin is driven to lift in the corresponding ejector pin mounting hole, when the bottom of the ejector pin completely enters the containing area of the curved surface contour, the ejector pin is positioned at a bottom dead center, and when the bottom of the ejector pin leaves the containing area of the curved surface contour and moves to the rod body, the ejector pin is positioned at a top dead center; when the thimble is positioned at the lower dead point, the upper end surface of the thimble is flush with the upper plane of the main body to form a 'flat point' of the Braille character, when the thimble is positioned at the upper dead point, the upper end surface of the thimble is higher than the upper plane of the main body to form a 'convex point' of the Braille character, and the maximum lift of the thimble is equal to the height of the 'convex point' of the Braille character;
all the actuating rods corresponding to each row of thimbles can be arranged on the same side of the main body or can be respectively arranged on the front side and the rear side of the main body, each actuating rod can be independently pushed and pulled back and forth in each actuating rod mounting hole, each actuating rod is provided with two stop positions, the actuating rods must stop at one of the stop positions after each pushing and pulling action is finished, when the actuating rods are at one of the stop positions, if the thimbles on the actuating rods are positioned in the curved surface contour of the end part of the actuating rods, the thimbles on the actuating rods must leave the curved surface contour of the end part of the actuating rods when the actuating rods are at the other stop position; when the ejector pin is positioned in the curved surface contour of the end part of the actuating rod, the ejector pin is positioned at the lower dead point; when the ejector pins leave the curved surface contour of the end part of the actuating rod and move to the rod body, the ejector pins are positioned at an upper stop point, and when each ejector pin is positioned at the position of the upper stop point or the lower stop point under the action of the actuating rod, a required Braille contact array is generated;
the actuating rod further comprises a small shaft neck, and the curved surface contour and the small shaft neck are respectively arranged at the front end and the rear end of the rod body;
the other end of each actuating rod is connected with a permanent magnet, the magnetic pole of one side of the permanent magnet points to the outside, and the permanent magnet can be directly connected to the end face of the actuating rod or can be wrapped in an enveloping frame for magnetic isolation and then assembled with the actuating rod; the outer diameter of the enveloping frame is larger than the inner diameter of the actuating rod mounting hole;
the actuator is composed of a solenoid and a semi-hard magnetic core shaft inside the solenoid, the solenoid is installed at one end of the semi-hard magnetic core shaft, the excitation direction of the semi-hard magnetic core shaft is changed by controlling the direct current applied to the solenoid in the positive direction and the negative direction, and the solenoid and a permanent magnet at the end of the actuating rod act to realize the push-pull action of the actuating rod.
2. The low power consuming electromagnetic pull rod braille dot display module of claim 1, characterized in that: when the curved surface profile is vertically sectioned along the central line at the working position, the profile shape is one or the combination of two of an oblique straight line, an arc line, a sine line and an involute.
3. The low power consuming electromagnetic pull rod braille dot display module of claim 1, characterized in that: for the braille display module with eight points per square, the number of thimbles per square is eight, the number of corresponding actuating rods is eight, when a group of actuating rods corresponding to the thimbles per square is arranged on the front side and the rear side of the main body, four actuating rods are respectively arranged on each side of the main body, the four actuating rods on each side are respectively responsible for driving four thimbles close to the side, the four actuating rods on each side are arranged into four rows in the up-down direction, wherein the two actuating rods on the upper side drive the two thimbles on the outer side, and the two actuating rods on the lower side drive the two thimbles on the inner side; when a group of actuating rods corresponding to each square thimble is arranged on one side of the main body, eight actuating rods on each side are arranged in eight rows in the vertical direction and respectively drive eight thimbles on each side;
for the six-point Braille display module, the number of the thimbles in each square is six, and the number of the corresponding actuating rods is six; two and four or three and three actuating rods are respectively arranged at the front side and the rear side of the main body, and the driving mode of the actuating rods is the same as that of an eight-point Braille display module; the six actuating rods of each square of the six-point Braille display module can be arranged on the same side of the main body, the actuating rods on the same side of the main body are arranged in a mode corresponding to the actuating rod mounting holes, the central lines of the actuating rods in each row are parallel, and the central lines of the actuating rods in adjacent rows are crossed.
4. The low power consuming electromagnetic pull rod braille dot display module of claim 1, characterized in that: the thimble mounting hole is in a step shape with a thin upper part and a thick lower part, the thin hole at the upper part is in a circular shape, and the thick hole at the lower part is in a circular or square shape;
the thimble sequentially comprises a top part, a head part, a body part, a tail part and a bottom part from top to bottom, and the top part of the thimble adopts the outline shape of a hemispherical or parabolic rotating curved surface and is used for the touch of the fingers of the blind; the head part of the thimble is cylindrical and can move up and down in a thinner hole at the upper part of the thimble mounting hole, and the body part of the thimble adopts a cylindrical structure or a cuboid structure and is matched with a thicker hole at the lower part of the thimble mounting hole to play a role in guiding; the tail part of the thimble is cylindrical and is positioned in a thicker hole at the lower part of the thimble mounting hole; the bottom of the thimble adopts a semi-sphere or cylinder structure which is convenient to be matched with the curved surface profile of the end part of the actuating rod.
5. The low power consuming electromagnetic pull rod braille dot display module of claim 1, characterized in that: the envelope frame is in a ring shape, one end of the envelope frame is provided with a small-diameter hole, the small-diameter hole is sleeved on a small shaft neck of the actuating rod and is fixedly connected with the small shaft neck, the other end of the envelope frame is provided with a large-diameter hole, and a permanent magnet is arranged in the large-diameter hole;
the front side and the rear side of the main body are respectively provided with a magnetic conductive clapboard for reducing the magnetic field influence and the magnetic dispersion between the solenoids.
6. The low power consuming electromagnetic pull rod braille dot display module of claim 5, characterized in that: the front side and the rear side of the main body are respectively provided with a mounting bracket, the mounting brackets are positioned on the outer sides of the magnetic conductive partition plates, mounting holes are formed in one sides of the mounting brackets, which face the magnetic conductive partition plates, and the other ends of the semi-hard magnetic core shafts of the actuators are mounted in the mounting holes of the mounting brackets; the shape of the side surface of the mounting bracket facing one side of the magnetic conduction partition plate is matched with the shape of the corresponding side surface of the magnetic conduction partition plate, and the mounting bracket and the magnetic conduction partition plate are buckled together.
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| CN201811196457.9A CN109192008B (en) | 2018-10-15 | 2018-10-15 | Low-energy-consumption electromagnetic pull rod type braille dot display module |
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| CN110969915A (en) * | 2019-12-24 | 2020-04-07 | 北京三叶星云互动科技有限公司 | Braille display module and Braille display device |
| RU2758684C1 (en) * | 2021-04-16 | 2021-11-01 | Общество с ограниченной ответственностью "4Блайнд" | Device and method for displaying relief-dot images of information |
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