CN112233506B

CN112233506B - Electromagnetic braille display device

Info

Publication number: CN112233506B
Application number: CN202011201870.7A
Authority: CN
Inventors: 吕虹
Original assignee: Suzhou Yudeshui Electric Technology Co Ltd
Current assignee: Suzhou Yudeshui Electric Technology Co Ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2022-07-12
Anticipated expiration: 2040-06-03
Also published as: CN112201121B; CN112201121A; CN112233506A; CN111462593A; CN111462593B

Abstract

The invention relates to the technical field of Braille display, in particular to an electromagnetic Braille display device which comprises a display area, a control area and a transmission area, wherein at least one row of Braille display units are arranged on the display area, one Braille display unit comprises six touch holes, a page turning button and a switch button which are used for controlling the Braille information switching on the display area are arranged on the control area, a motor is arranged in a motor chamber of the transmission area, and a cross-flow centrifugal impeller is arranged in a fan chamber; the display area with the touch holes is designed, the supercharging device is used for controlling the air flow of the local touch holes, the air columns which are sprayed outwards are realized, and a user can feel the bulges formed by the air columns when touching the positions of the touch holes to replace the original rigid bulges, so that the condition that the normal movement of the lifting structure is influenced due to the fact that sweat stains and dust are filled into gaps is effectively avoided, the use is more convenient, and more cleaning and management are not needed.

Description

Electromagnetic braille display device

Technical Field

The invention relates to the technical field of Braille display, in particular to an electromagnetic Braille display device.

Background

The touch reading speed is high, the identification degree is high, and the method is the most important reading mode for the blind. However, the conventional braille books are expensive, complex in manufacturing process and long in time consumption, and the published braille books are few, single in variety, lag in information, small in information amount, heavy in size and inconvenient to carry, so that the conventional braille books can not meet the reading requirements of the blind people. How to utilize modern science and technology to develop a barrier-free reading tool for the blind, namely a braille reader, becomes a focus of social concern increasingly.

Therefore, the invention with the application number of CN201410632715.9 discloses a layered electromagnetic braille display device and a braille reader, which adopt the electromagnetic induction working principle, can display one line or a plurality of lines of braille characters, meet the reading and learning requirements of the blind, have great social significance, besides the electromagnetic braille display device, the braille display device also has the pneumatic type and memory alloy mode, and the like, the braille display device needs to be popped up in a groove by a bulge so as to be convenient for the blind to sense the convex points, but because the braille display device is a thing frequently touched by hands, the panel is not prevented from being adhered with sweat stain and dust, especially for people who easily sweat the hands, most of the products in the prior art are integrated, the panel is not easy to disassemble and clean, when the sweat stain and dust are adhered to the gap between the convex points and the groove and are gradually accumulated, the local convex points can not be popped up, but also difficult to clean, thus not meeting the requirements of users.

Disclosure of Invention

The invention aims to provide an electromagnetic braille display device to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electromagnetic type braille display device, includes display area, control area and transmission area, be equipped with at least one row of braille display element on the display area, a braille display element includes six touch holes, be equipped with on the control area and be used for control the page turning button and the shift knob that the braille information switches on the display area, be equipped with crossing current centrifugal impeller in motor, the fan room of transmission area, crossing current centrifugal impeller connects the output of motor, crossing current centrifugal impeller is used for control on the display area the exhaust/the state of breathing in of touch hole.

Preferably, the display area comprises an upper panel, a middle panel, a bottom panel and an electromagnet circuit board which are distributed from top to bottom, fan chambers are arranged at two ends between the upper panel and the middle panel, the cross flow centrifugal impeller is positioned in the fan chambers, an air inlet part of the cross flow centrifugal impeller is connected between the middle panel and the bottom panel through an air suction bent pipe, a pressurization space is formed between the upper panel and the middle panel, and a negative pressure space is formed between the middle panel and the bottom panel.

Preferably, the cross flow centrifugal impeller comprises two end plates, blades distributed in an annular shape are fixed between the two end plates, an exhaust part is formed between the blades, a bearing is mounted on the end face of the outer side of each end plate, a gear ring is fixed on an inner ring of the bearing on one end of each end plate, the gear ring is meshed with a driving gear at the output end of the motor, and the end plates are rotatably connected with the fan chamber through the bearings.

Preferably, the air inlet portion is located at one end of the blade far away from the driving gear, and the air suction elbow and the air inlet portion are located on the same side of the cross flow centrifugal impeller.

Preferably, the upper panel, the middle panel and the bottom panel are all provided with sliding holes for accommodating the air guide tubes to pass through, the closed ends of the air guide tubes are provided with permanent magnets, and the electromagnet circuit board is provided with electromagnets which are distributed correspondingly to the air guide tubes and used for controlling the air guide tubes to slide up and down.

Preferably, the upper end of air duct is equipped with the spacing ring of outside extension, be equipped with on the upper panel with spacing ring complex spacing groove, the inside of air duct is equipped with the intermediate passage who extends to the blind end from the upper end, the outer wall of air duct be equipped with distribute about being and with inlet channel and the air discharge duct of intermediate passage intercommunication.

Preferably, the thickness of the middle layer panel is larger than the height of any one of the air inlet slot and the air exhaust slot, and when the electromagnet drives the air guide pipe to move up and down to a limiting state, the middle layer panel blocks one of the air inlet slot and the air exhaust slot.

Preferably, the electromagnet comprises an iron core and an electromagnetic coil, and the iron core is located on the inner side of the electromagnetic coil.

Preferably, the air inlet groove or the air exhaust groove is a round hole or a square hole, and the heights of the air inlet groove and the air exhaust groove are the same.

Preferably, a wind power control button for controlling the driving power of the motor is further arranged on the control area.

Compared with the prior art, the invention has the beneficial effects that:

the display area with the touch holes is designed, the supercharging device is used for controlling the air flow of the local touch holes, the air columns which are sprayed outwards are realized, and a user can feel the bulges formed by the air columns when touching the positions of the touch holes to replace the original rigid bulges, so that the condition that the normal movement of the lifting structure is influenced due to the fact that sweat stains and dust are filled into gaps is effectively avoided, the use is more convenient, and more cleaning and management are not needed.

Drawings

FIG. 1 is a schematic structural diagram of an electromagnetic Braille display device according to the present invention;

fig. 2 is a schematic structural view of a pressurized space and a pressurized space in an electromagnetic type braille display device according to the present invention;

FIG. 3 is a schematic structural view of a cross-flow centrifugal impeller of an electromagnetic Braille display device according to the present invention;

FIG. 4 is a schematic view illustrating air intake and exhaust states of a touch hole in an electromagnetic Braille display apparatus according to the present invention;

FIG. 5 is a schematic structural diagram of an air duct in the electromagnetic Braille display device according to the present invention;

FIG. 6 is another schematic structural diagram of an air duct in the electromagnetic Braille display device according to the present invention;

fig. 7 is a schematic structural view of an electromagnet in an electromagnetic braille display device according to the present invention.

Reference numbers in the figures: 11. a display area; 111. a touch hole; 12. a control area; 121. a switch button; 122. a wind control button; 123. a page turning button; 13. a drive zone; 131. a motor chamber; 132. a fan chamber; 2. a motor; 21. a drive gear; 3. a cross-flow centrifugal impeller; 301. an air intake portion; 302. an exhaust section; 31. a suction elbow; 32. an end plate; 33. a blade; 34. a bearing; 35. a ring gear; 401. a plenum space; 402. a negative pressure space; 41. an upper panel; 411. a limiting groove; 42. a middle layer panel; 43. a bottom panel; 44. an electromagnet circuit board; 5. an air duct; 51. a limiting ring; 501. a middle channel; 502. an air inlet groove; 503. an exhaust groove; 52. a closed end; 6. a permanent magnet; 7. an electromagnet; 71. an iron core; 72. an electromagnetic coil.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 7, an electromagnetic braille display device includes a display area 11, a control area 12 and a transmission area 13, at least one row of braille display units is disposed on the display area 11, one braille display unit includes six touch holes 111, specifically, multiple rows of braille display units can be designed to display more information, for example, two rows or three rows, the display effect is achieved by the difference of the air outlet of the six touch holes 111 in each braille display unit, a page turning button 123 and a switch button 121 for controlling the braille information switching on the display area 11 are disposed on the control area 12, the display principle of the display area 11 and the page turning and opening/closing devices of the page turning button 123 and the switch button 121 for controlling the information are all the existing mature technologies, which are not repeated herein, a motor 2 is disposed in a motor chamber 131 of the transmission area 13, and a cross flow centrifugal impeller 3 is disposed in a fan chamber 132, the cross flow centrifugal impeller 3 is connected to the output end of the motor 2, the cross flow centrifugal impeller 3 is used for controlling the exhaust/suction state of the touch holes 111 on the display area 11, the motor 2 is used for driving the cross flow centrifugal impeller 3 to rotate, a pressurization space 401 and a negative pressure space 402 are formed inside the display area 11, and blowing and suction effects can be formed in the corresponding touch holes 111, so that a user can feel a convex effect to identify display information.

Specifically, as shown in fig. 2, the display area 11 includes an upper panel 41, a middle panel 42, a bottom panel 43 and an electromagnet circuit board 44 distributed from top to bottom, a fan chamber 132 is provided at both ends between the upper panel 41 and the middle panel 42, a cross flow centrifugal impeller 3 is located in the fan chamber 132, an air inlet 301 of the cross flow centrifugal impeller 3 is connected between the middle panel 42 and the bottom panel 43 through an air suction bent pipe 31, a pressurizing space 401 is formed between the upper panel 41 and the middle panel 42, a negative pressure space 402 is formed between the middle panel 42 and the bottom panel 43, when the cross flow centrifugal impeller 3 rotates, air is thrown outwards by centrifugal force, that is, the periphery of the fan chamber 132 is in a high pressure state and extends to the pressurizing space 401, a negative pressure is formed at the middle position of the cross flow centrifugal impeller 3, extends into the negative pressure space 402 through the air suction bent pipe 31, the negative pressure space 402 is evacuated, a negative pressure effect is formed.

Specifically, as shown in fig. 3, the cross-flow centrifugal impeller 3 includes two end plates 32, blades 33 distributed in an annular shape are fixed between the two end plates 32, an exhaust portion 302 is formed between the blades 33, a bearing 34 is installed on an end surface of an outer side of the end plate 32, a gear ring 35 is fixed on an inner ring of the bearing 34 on the end plate 32 at one end, the gear ring 35 is meshed with a driving gear 21 at an output end of the motor 2, the end plate 32 is rotatably connected with the fan chamber 132 through the bearing 34, the motor 2 drives the driving gear 21 at the output end to rotate, the driving gear 21 is meshed with the gear ring 35 to drive the end plate 32 and the blades 33 to rotate, the bearing 34 is used for supporting, so that the end plate 32 stably rotates in the fan chamber 132, and air is continuously thrown between the blades 33 to form the exhaust portion 302.

Specifically, the air intake portion 301 is located at one end of the blade 33 away from the drive gear 21, and the air intake bent pipe 31 and the air intake portion 301 are located on the same side of the cross flow centrifugal impeller 3, and since the fan chamber 132 at one end of the drive gear 21 is closed, air can be taken in only from one end of the air intake bent pipe 31.

Specifically, the upper panel 41, the middle panel 42 and the bottom panel 43 are all provided with sliding holes for accommodating the air guide tubes 5 to pass through, the closed ends 52 of the air guide tubes 5 are provided with permanent magnets 6, the electromagnet circuit boards 44 are provided with electromagnets 7 which are distributed corresponding to the air guide tubes 5 and used for controlling the air guide tubes 5 to slide up and down, the electromagnet circuit boards 44 are far away from the circuit boards in the electromagnetic braille display products in the prior art, and the local electromagnets are controlled to drive the corresponding action rods above the electromagnet circuit boards to move so as to display different characters, while the air guide tubes 5 in the invention distribute air passages when moving up and down, so that the touch holes 111 at the upper ends of the air guide tubes are in an exhaust or suction state so as to realize the touch display purpose, because the closed ends 52 of the air guide tubes 5 are provided with the permanent magnets 6, the air guide tubes 5 are attached to the electromagnets 7 and cannot slide freely when not being electrified, when the electromagnet 7 is electrified, the air duct 5 is pushed upwards to the limit position through repulsive force.

Specifically, the upper end of the air duct 5 is provided with a limiting ring 51 extending outwards, the upper panel 41 is provided with a limiting groove 411 matched with the limiting ring 51, the interior of the air duct 5 is provided with a middle channel 501 extending from the upper end to the closed end 52, the outer wall of the air duct 5 is provided with an air inlet groove 502 and an air outlet groove 503 which are distributed up and down and communicated with the middle channel 501, the limiting groove 411 on the air duct 5 can slide only at the height of the limiting groove 411 by utilizing the limiting groove 411, the stroke is limited, when the air inlet groove 502 enters the negative pressure space 402, the middle channel 501 sucks external air (at the touch hole 111) into the air inlet groove 502 and discharges the air into the negative pressure space 402, when the air outlet groove 503 enters the pressurization space 401, the air in the pressurization space 401 enters the middle channel 501 through the air outlet groove 503 and discharges to the touch hole 111 to form an upward air flow column, and the sucked touch hole 111 forms negative pressure, the display effect of the touch hole 111 is increased.

Specifically, the thickness of the middle-layer panel 42 is greater than the height of any one of the air inlet groove 502 and the air outlet groove 503, when the electromagnet 7 drives the air duct 5 to move up and down to the limit state, the middle-layer panel 42 blocks one of the air inlet groove 502 and the air outlet groove 503, that is, the same air duct 5 can only realize the air inlet or air outlet state in the normal state, and the air inlet groove 502 and the air outlet groove 503 are simultaneously acted in the movement process, but the time is short and can be ignored.

Specifically, the electromagnet 7 includes an iron core 71 and an electromagnetic coil 72, the iron core 71 is located inside the electromagnetic coil 72, the iron core 71 is mainly used to be attracted by the permanent magnet 6 when the electromagnetic coil 72 is de-energized, and the magnetic force of the electromagnetic coil 72 can be increased to bounce the permanent magnet 6 when the electromagnetic coil 72 is energized.

Specifically, as shown in fig. 5 and 6, the intake duct 502 or the exhaust duct 503 is a circular hole or a square hole, and the intake duct 502 and the exhaust duct 503 have the same height, and when the intake duct 502 is a square hole, a larger intake air amount or exhaust air amount can be maintained even in the case of a lower height, that is, a shorter displacement amount can be realized to realize switching between the intake duct 502 and the exhaust duct 503, and the middle-layer panel 42 can be made thin correspondingly.

Specifically, the control area 12 is further provided with a wind control button 122 for controlling the driving power of the motor 2, and a user can control the power of the motor 2 by using the principle of a sliding rheostat through the wind control button 122 to realize the control of the size of the air column, so as to change the touch effect.

Specifically, a detection coil is further provided in the electromagnetic coil 72, when a finger touches one of the touch holes 111 in one cell, a feedback is formed, the air duct 5 slightly moves downward due to air pressure, the detection coil detects the changing magnetic field of the permanent magnet 6, a feedback signal is formed, and the cells except the cell adjacent to the detection coil (adjacent indicates the logical adjacency in the reading and writing order, for example, the end of one line is adjacent to the display cell before the line change and the first display cell at the beginning of the second line) are closed, namely, the touched cell and the display cell adjacent to the touched cell are in a display effect, and the other cells are in a closed state, so that all the other display cells are in a negative pressure state, and only the touched cell is in a gas release state, so that the display effect of the gas column is higher.

The working principle is as follows: after a user presses a switch button 121 on the control display area 11, the motor 2 drives a driving gear 21 at the output end to rotate, the driving gear 21 is meshed with a gear ring 35 to drive an end plate 32 and blades 33 to rotate, the end plate 32 is supported by a bearing 34 to stably rotate in a fan chamber 132, air is continuously thrown out among the blades 33 to form an exhaust part 302, when a cross flow centrifugal impeller 3 rotates, the air is thrown outwards by centrifugal acting force, namely the periphery of the fan chamber 132 is in a high-pressure state and extends to a pressurization space 401, negative pressure is formed in the middle position of the cross flow centrifugal impeller 3, the cross flow centrifugal impeller 3 extends into a negative pressure space 402 through an air suction bent pipe 31 to perform air suction on the negative pressure space 402 to form a negative pressure effect, an electromagnet circuit board 44 is connected with a power supply to control the corresponding electromagnet 7 to be electrified according to text information, and the electromagnet circuit board 44 is far away from the circuit board in the prior art electromagnetic braille display product, the air duct 5 of the invention distributes the air path when moving up and down, so that the touch hole 111 at the upper end is in an exhaust or suction state, thus realizing the purpose of touch display, because the closed end 52 of the air duct 5 is provided with the permanent magnet 6, the air duct 5 is attached to the electromagnet 7 and can not slide freely when the electromagnet 7 is electrified, the air duct 5 is pushed up to a limit position through repulsive force, the limit groove 411 on the air duct 5 can only slide at the height of the limit groove 411 by utilizing the limit groove 411, thus limiting the stroke, when the air inlet groove 502 enters the negative pressure space 402, the middle channel 501 sucks the outside air (at the touch hole 111) into the air inlet groove 502 and discharges the air into the negative pressure space 402, when the air discharge groove 503 enters the pressurization space 401, the air in the pressurization space 401 enters the middle channel 501 through the air discharge groove 503 and is arranged to the touch hole 111 to form an upward airflow column, and the sucked touch hole 111 forms negative pressure, so that the display effect of the touch hole 111 is increased.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An electromagnetic braille display device is characterized in that: the Braille display screen comprises a display area (11), a control area (12) and a transmission area (13), wherein at least one row of Braille display units are arranged on the display area (11), one Braille display unit comprises six touch holes (111), page turning buttons (123) and switch buttons (121) for controlling the switching of Braille information on the display area (11) are arranged on the control area (12), a motor (2) is arranged in a motor chamber (131) of the transmission area (13), a cross flow centrifugal impeller (3) is arranged in a fan chamber (132), the cross flow centrifugal impeller (3) is connected to the output end of the motor (2), the cross flow centrifugal impeller (3) is used for controlling the exhaust/suction state of the touch holes (111) on the display area (11), and the display area (11) comprises an upper panel (41) and a middle panel (42) which are distributed from top to bottom, The fan-shaped air conditioner comprises a bottom panel (43) and an electromagnet circuit board (44), fan chambers (132) are arranged at two ends between the upper panel (41) and the middle panel (42), an air inlet part (301) of the cross-flow centrifugal impeller (3) is connected between the middle panel (42) and the bottom panel (43) through an air suction bent pipe (31), a pressurization space (401) is formed between the upper panel (41) and the middle panel (42), and a negative pressure space (402) is formed between the middle panel (42) and the bottom panel (43); the upper layer panel (41), the middle layer panel (42) and the bottom layer panel (43) are all provided with sliding holes for accommodating the air guide pipes (5) to pass through, the closed ends (52) of the air guide pipes (5) are provided with permanent magnets (6), and electromagnets (7) which are distributed corresponding to the air guide pipes (5) and used for controlling the air guide pipes (5) to slide up and down are arranged on the electromagnet circuit board (44); the upper end of the air duct (5) is provided with a limiting ring (51) extending outwards, the upper panel (41) is provided with a limiting groove (411) matched with the limiting ring (51), the interior of the air duct (5) is provided with a middle channel (501) extending from the upper end to the closed end (52), and the outer wall of the air duct (5) is provided with an air inlet groove (502) and an air outlet groove (503) which are distributed vertically and communicated with the middle channel (501); the electromagnet (7) comprises an iron core (71) and an electromagnetic coil (72), and the iron core (71) is located on the inner side of the electromagnetic coil (72).

2. An electromagnetic braille display device according to claim 1, characterized in that: the thickness of the middle-layer panel (42) is larger than the height of any one of the air inlet groove (502) and the air exhaust groove (503), and when the electromagnet (7) drives the air guide pipe (5) to move up and down to a limiting state, the middle-layer panel (42) blocks one of the air inlet groove (502) and the air exhaust groove (503).

3. An electromagnetic braille display device according to claim 2, characterized in that: the air inlet groove (502) or the air exhaust groove (503) is a round hole or a square hole, and the heights of the air inlet groove (502) and the air exhaust groove (503) are the same.