CN108281070A - Permanent magnetism self-locking linear drives type braille contact pilotage shows structure - Google Patents

Abstract

The invention discloses a kind of permanent magnetism self-locking linear drives type braille contact pilotages to show structure.Including touch tablet, cover board, shell, bottom plate and circuit board；Cage connection forms the space for installing touch driving unit of inner hollow between cover board bottom surface and plate top surface, and cover board top surface connecting cover plate, bottom plate bottom surface connects circuit board；It touches after driving unit upper end passes through cover board and stretches out touch tablet, touch after driving unit lower end passes through bottom plate and connect with circuit board, it includes needle cap, thimble, upper permanent magnet, iron core, electromagnetic coil and lower permanent magnet to touch driving unit.The present invention uses solenoid controlled, and drive part fast response time, display module refresh rate is high, low in energy consumption, small, light-weight.

Description

Permanent magnet self-locking linear drive type braille stylus display structure

technical field

The invention relates to a braille display structure, in particular to a permanent magnet self-locking linear drive type braille stylus display structure, which is mainly used in related braille readers or braille equipment, and belongs to the field of mechanical engineering.

technical background

According to the global population statistics of the World Health Organization (WHO) in 2010, there are about 285 million people with different degrees of vision impairment worldwide, and about 39 million blind people are severely impaired. As the country with the largest population in the world, China is also the country with the largest number of blind people in the world. Therefore, for such a large and important group of blind people, the society needs to give them care and support, and they also urgently need a good learning environment and cultural education.

Due to impaired vision, blind people cannot learn and read normally like sighted people. Blind people can only rely on touch, hearing and some residual vision to obtain external environmental information. Currently, blind people can obtain text or images through the tactile perception of finger touch. Such information is the main way for the blind to obtain external information.

Blind people read Braille books through touch, and the number of Braille books is also very limited, which cannot meet the blind people's demand for knowledge. Moreover, the production cost of Braille books is relatively high, the production cycle is long, and the requirements for paper are also very strict. It is not easy to preserve for a long time, and the types and contents are also very limited. With the development of society and the advancement of science and technology, in order to help the blind to read and learn better, it is necessary to develop a low-cost, strong sense of experience, easy to carry, fast response, real-time reading, fast refresh, and vision A Braille reader whose pixels are replaced by contacts.

Braille, also known as Braille or embossed, is a kind of character specially designed for the blind to read by touch. Blind people can read text and acquire knowledge by touching the raised dots of Braille. Braille was first invented in Paris in 1824 by the blind Frenchman Louis Braille. At present, the Braille invented by Louis Braille is internationally recognized as official Braille. China now has a national standard for Braille (GB/T15720— 2008). The Braille touch drive unit is an important part of the Braille reading device. Researchers at home and abroad have developed different drive structures based on different drive principles, mainly including piezoelectric ceramics, electric stimulation, memory alloy, pneumatic, temperature control, electromagnetic and others. Driving methods such as new materials.

Although many tactile assistive devices with similar functions have appeared on the market, the cost and price are too high, and the power consumption is also very large. Although the cost of other small-sized devices is controlled, they violate the common touch habits of the blind. The method and interaction experience are not good. Therefore, developing a braille display module with low power consumption, low cost, and safe and reliable use provides the possibility for the development and popularization of braille reading devices or braille display devices, and has important value.

Contents of the invention

Aiming at the shortcomings of the existing Braille contact drive mechanism, the present invention proposes a permanent magnet self-locking linear drive type Braille stylus display structure. The Braille point display module is an important part of the Braille point display device and the Braille reading device. It is suitable for all languages and all forms of Braille character generation. At the same time, this module can not only improve the reading speed of blind people, but also greatly reduce power consumption.

The technical solution adopted by the present invention to solve its technical problems is:

The invention includes a touch panel, a cover plate, a shell, a bottom plate and a circuit board; the shell is connected between the bottom surface of the cover plate and the top surface of the bottom plate to form an internal hollow space for installing a touch drive unit, and the top surface of the cover plate is connected to the cover plate and the bottom plate The bottom surface is connected to the circuit board; the upper end of the touch driving unit passes through the cover plate and extends out of the touch panel, and the lower end of the touch driving unit passes through the bottom plate and is connected to the circuit board.

The touch drive unit includes a needle cap, a thimble, an upper permanent magnet, an iron core, an electromagnetic coil and a lower permanent magnet; the electromagnetic coil is fixed on the bottom plate, and a core rod is fixed at the lower end of the iron core, and the core rod is inserted into the middle hole of the electromagnetic coil , the lower end of the electromagnetic coil is provided with a guide pin, and the guide pin is connected to the circuit board after passing through the base plate, and the base plate below the electromagnetic coil is provided with a lower permanent magnet, and the lower permanent magnet is located directly below the end of the core rod; the upper part of the iron core The upper permanent magnet is fixed on the bottom of the cover plate, and the thimble is fixed on the upper end of the iron core. The thimble and the core rod are installed coaxially. in the cavity of the touchpad. When the electromagnetic coil is energized or not energized, the iron core is driven to move up and down, and then the needle cap is driven to extend out of the cavity of the touch panel or be accommodated in the cavity of the touch panel.

In the present invention, when the working position is not energized, the needle cap protrudes out of the cover plate against the gravity under the magnetic thrust, and is kept at a high position to form a permanent magnetic self-lock, which drives the Braille stylus to be controlled autonomously.

The two magnetic poles of the upper permanent magnet and the lower permanent magnet are arranged along the vertical direction, and the arrangement directions of the magnetic poles are opposite.

The bottom of the electromagnetic coil is embedded in the groove of the bottom plate.

The lead pins pass through the lead pin holes of the bottom plate, are welded to the circuit board, and pass through the circuit board.

The upper permanent magnet is embedded in the groove of the cover plate with an interference fit.

It includes eight touch drive units, and the eight touch drive units are arranged in a 2*4 array to form an eight-point Braille touch.

The touch drive units are all connected to the control circuit board, and the control circuit board controls the input of the positive and negative currents of the electromagnetic coil, so that the iron core generates different magnetic poles. And under the action of the lower permanent magnet, the movement up and down is realized.

The hole spacing on the touch panel corresponds to the distance between each needle cap, and the rising height of the needle cap meets the requirements of standard Braille characters.

The beneficial effects that the present invention has are:

1. The present invention adopts electromagnetic coil control, the driving part responds quickly, the display module refresh rate is high, the power consumption is low, the volume is small, the weight is light, the stability is good, and the reliability is high, which can greatly reduce power consumption and save resources.

2. The present invention can be randomly combined and arranged to produce a tactile recognition device for the blind with fast refresh and replacing visual pixels with contacts.

Description of drawings

Fig. 1 is an appearance diagram of a one-sided 8-dot Braille display module of the present invention.

Fig. 2 is an internal view of the unilateral 8-dot Braille display module of the present invention.

Fig. 3 is a side sectional view of the unilateral 8-dot Braille display module of the present invention.

Fig. 4 is a schematic diagram of the single needle structure of the present invention.

Fig. 5 is a schematic diagram of the driving principle of the single needle of the present invention.

Fig. 6 is a schematic diagram of a Braille reading device of the present invention.

Among the figure: touch panel 10, cover plate 20, needle cap 30, thimble 40, upper permanent magnet 50, shell 60, iron core 70, electromagnetic coil 80, lower permanent magnet 90, base plate 100, circuit board 110, guide pin 120.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Fig. 3 and Fig. 4, the present invention includes a touch panel 10, a cover plate 20, a needle cap 30, a thimble 40, an upper permanent magnet 50, a casing 60, an iron core 70, an electromagnetic coil 80, a lower permanent magnet 90, and a bottom plate 100 , a circuit board 110 , and lead pins 120 . Wherein, as shown in Figure 1, the touch panel 10, the cover plate 20, the housing 60, the base plate 100 and the circuit board 110 are sequentially fixedly connected into one body from top to bottom, and the housing 60 is connected between the bottom surface of the cover plate 20 and the top surface of the base plate 100 A hollow space for installing the touch drive unit is formed inside, the top surface of the cover plate 20 is connected to the cover plate 20, and the bottom surface of the bottom plate 100 is connected to the circuit board 110; the touch drive unit is mainly installed in the housing 60, and the upper end of the touch drive unit passes through the cover plate 20. The touch panel 10 extends out, and the lower end of the touch driving unit passes through the base plate 100 and is connected to the circuit board 110 .

As shown in Figure 3 and Figure 4, the touch drive unit includes a needle cap 30, a thimble 40, an upper permanent magnet 50, an iron core 70, an electromagnetic coil 80 and a lower permanent magnet 90; the electromagnetic coil 80 is fixed on the inner wall of the shell 60, and the iron core 70 The lower end is fixed with a core rod, and the core rod is inserted into the middle hole of the electromagnetic coil 80. The lower end of the electromagnetic coil 80 is provided with a guide pin 120. The guide pin 120 passes through the base plate 100 and is connected to the circuit board 110. There is a lower permanent magnet 90, and the lower permanent magnet 90 is located directly below the end of the core rod of the iron core 70; the upper permanent magnet 50 is fixed on the bottom surface of the cover plate 20 above the iron core 70, and the upper end of the iron core 70 is fixed with a thimble 40, and the thimble 40 and The core rod is coaxially installed, and the top of the thimble 40 passes through the through hole on the upper permanent magnet 50 and the cover plate 20 and is connected with the needle cap 30. There are bores for the needle cap 30 to move up and down.

In specific implementation, the lower permanent magnets 90 are respectively inserted into the lower grooves of the electromagnetic coils 80, and the two are fixedly connected. Through the pin hole of the bottom plate 100, it is convenient for the welding of the circuit board 110 later, and the iron core 70 is respectively inserted into the middle hole of the electromagnetic coil 80, and the upper permanent magnet 50 is fixed in the groove of the cover plate 20 with interference, and the upper and lower permanent magnets are fixed in the groove. During the assembly process of the magnet, it is necessary to ensure that the magnetic poles of the upper and lower permanent magnets are installed correctly, as shown in Figure 5.

The specific implementation is shown in Figure 2. A Braille stylus display unit displays a "square" of a Braille character, and one "square" is eight concave-convex points formed by different heights represented by eight stylus in four rows and two columns. Arranged and combined, each stylus is driven by an electromagnetic coil. The module has a total of eight touch drive units, and the eight touch drive units are arranged in a 2*4 array to form an eight-point Braille touch.

After all the driving parts of a "square" are installed, put on the casing 60, the casing 60 is fixedly connected with the bottom plate 100 by glue, cover the cover plate 20, the cover plate 20 and the casing 60 are fixedly connected by glue, insert the thimble 40 In the upper groove of the iron core 70, a solid connection is formed, the needle cap 30 is fixed on the top of the thimble 40 by glue, the touch panel 10 is covered, and the bottom of the module is embedded in the circuit board 110, wherein the guide pin 120 is guaranteed to pass through the circuit board 110 lead pin holes, and solder the lead pins 120 to the circuit board 120 .

The working principle of the present invention is as follows:

As shown in Figures 3 and 5, taking one of the single-needle drive structures as an example, by energizing the electromagnetic coil 80, a magnetic field is generated at both ends of the iron core. At this time, the upper end is an N pole, and the lower end is an S pole. , the principle of opposite sex attraction makes the upper end of the iron core 70 attract the upper permanent magnet 50, and the lower end of the iron core 70 repels the lower permanent magnet 90. Under the action of the magnetic force at both ends, the iron core moves upward, pushing the needle cap upward , to form bumps, when the current is cut off, the needle cap 30 will not return to the lowest position, because the upper permanent magnet 50 firmly attracts the iron core 70 so that it will not fall under the action of gravity, reducing power consumption ; When it is not necessary to form a working position, the reverse current is passed to the electromagnetic coil. At this time, the upper end is an S pole, and the lower end is an N pole. The lower end of 70 is attracted to the lower permanent magnet 90. Under the action of the magnetic force at both ends, the iron core 70 moves downward, causing the needle cap 30 to move downward to form a concave point. This is a working cycle, as shown in Figures 3 and 5 , where the left side of the figure represents the working bit, and the right side represents the non-working bit.

Through the driving control of a single needle, the control of a "square" eight-point display module is formed, and different Braille characters can be formed according to the different bumps, and finally combined into a permanent magnet self-locking linear drive type that can be used by the blind. Braille stylus display module, as shown in Figure 1. Finally, the assembly of different reading devices can be realized through the combination of individual modules. Here, 5×5 is taken as an example, as shown in FIG. 6 . Through different combinations of modules, a Braille touch reading device with M rows and N columns can be formed. At this time, there are 8×M×N contacts. This device can not only read Braille characters for the blind, but also help the blind to touch and read images. It has greatly increased the ways for blind people to obtain information.

Claims (9)

1. a kind of permanent magnetism self-locking linear drives type braille contact pilotage shows structure, it is characterised in that：Including touch tablet (10), cover board (20), shell (60), bottom plate (100) and circuit board (110)；Shell (60) is connected to cover board (20) bottom surface and bottom plate (100) top The space for installing touch driving unit of inner hollow, cover board (20) top surface connecting cover plate (20), bottom plate are formed between face (100) bottom surface connection circuit board (110)；It touches driving unit upper end and stretches out touch tablet (10) afterwards across cover board (20), touch and drive Moving cell lower end is connect with circuit board (110) afterwards across bottom plate (100).

2. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 1 shows structure, it is characterised in that： The touch driving unit include needle cap (30), thimble (40), upper permanent magnet (50), iron core (70), electromagnetic coil (80) and Lower permanent magnet (90)；Electromagnetic coil (80) is fixed on shell (60) inner wall, and iron core (70) lower end is fixed with core bar, and core bar is inserted into In electromagnetic coil (80) interstitial hole, electromagnetic coil (80) lower end be equipped with draw pin (120), draw pin (120) pass through bottom plate (100) afterwards with Circuit board (110) connects, and the bottom plate (100) below electromagnetic coil (80) is equipped with lower permanent magnet (90), lower permanent magnet (90) position Immediately below the end of iron core (70) core bar；Cover board (20) bottom surface above iron core (70) is fixed with permanent magnet (50), iron core (70) upper end is fixed with thimble (40), and thimble (40) and core bar are co-axially mounted, thimble (40) top pass through upper permanent magnet (50) and It is connect with needle cap (30) after through-hole on cover board (20), needle cap (30) is movably placed in the vestibule of touch tablet (10).

3. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： Two magnetic poles of the upper permanent magnet (50) and lower permanent magnet (90) are arranged along the vertical direction, and magnetic pole arranged direction is opposite.

4. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： Described electromagnetic coil (80) bottom is embedded in the groove of bottom plate (100).

5. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： The draw pin (120) wears out circuit board (110) after being welded to circuit board (110) behind the draw pin hole of bottom plate (100).

6. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： Upper permanent magnet (50) the interference fit ground is in the groove of cover board (20).

7. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： Include eight touch driving units, eight touch driving unit distribution and arranged in 2*4 arrays, form 8 braille touch-controls.

8. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： The touch driving unit is all connected with control circuit board, and the defeated of the positive counter current of electromagnetic coil (80) is controlled by control circuit board Enter so that iron core (70) generates different magnetic poles, according to the principle that identical charges repel each other, there is a natural attraction between the sexes, and iron core (70) is in upper permanent magnet (50) and under the action of lower permanent magnet (90), upper and lower movement is realized.

9. a kind of permanent magnetism self-locking linear drives type braille contact pilotage according to claim 2 shows structure, it is characterised in that： Pitch of holes on the touch tablet (10) corresponds to the distance between each needle cap (30).