CN108831259A - The braille point of four cam coaxials driving shows device - Google Patents
The braille point of four cam coaxials driving shows device Download PDFInfo
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- CN108831259A CN108831259A CN201810732692.7A CN201810732692A CN108831259A CN 108831259 A CN108831259 A CN 108831259A CN 201810732692 A CN201810732692 A CN 201810732692A CN 108831259 A CN108831259 A CN 108831259A
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- contact
- cam
- contact pilotage
- braille
- driving
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B21/00—Teaching, or communicating with, the blind, deaf or mute
- G09B21/001—Teaching or communicating with blind persons
- G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays
- G09B21/004—Details of particular tactile cells, e.g. electro-mechanical or mechanical layout
Abstract
The invention discloses a kind of braille points of four cam coaxials driving to show device.Contact pilotage driving mechanism is mainly made of contact pilotage, cam, camshaft and compressed spring, is mounted on inside support frame；Stepper motor drive cam shaft, band moving cam rotates, contact pilotage is set to move up and down, cam, which rotates a circle, 16 stop positions, angular interval is 22.5 degree, makes the different Brailles of 16 kinds of four contact pilotages composition that contact pilotage is in lower position-arresting or upper position-arresting makes contact pilotage driving mechanism by the special arrangement of stop position on respective cam；Two camshafts are matched with 8 pieces of contact pilotages, and rotating a circle can make the stopping bit combination of 8 pieces of contact pilotages have 256 kinds, form the male-female arrangement of 8 braille contacts, realize whole combinations of 8 braille contacts of a side.The features such as driving method of the present invention is simple, a driver can be achieved with the concave-convex of 4 braille contacts and present, low in energy consumption, small in size, kinematic accuracy is high, is easy to the popularization that braille point shows device, has good social benefit and application value.
Description
Technical field
The present invention relates to a kind of braille points to show device, more particularly, to a kind of braille point of four cam coaxials driving
Aobvious device, can be with Dynamically Announce braille, for reading braille and study braille.
Background technique
According to the World Health Organization (WHO) in population in the world data statistics in 2010 the results show that in the whole world, depending on
The impaired personnel amount about 2.85 hundred million of power, and China is the country that blind person is most in the world.Blind person is for information interchange
Highly difficult, and for so huge blind community, society need gives them and cares about and support.
The mode that blind person obtains information includes that the sense of hearing reads, touches and read, and reads to have by the tactile of finger and read
The feature that speed is fast, information differentiating degree is good is course that school for the blind must be taught and blind person with it is extraneous exchange, interpersonal friendship
Past one of the ability that must be grasped is the main approach that blind person obtains knowledge and information at this stage.
However, traditional papery books printed in braille involve great expense, storage information content is few, blind person it is desirable that it is a kind of it is at low cost,
Experience sense is strong, easy to carry, fast response time, it can be achieved that read immediately, can fast refresh, the pixel of vision is substituted for
The Braille alphabet reading device of contact.
Although the braille point that domestic and foreign scholars have developed various drive forms shows device, application is relatively successfully blinder at present
Text puts aobvious driving mechanism and there was only piezoelectric ceramic type and electromagnetic type.Moreover, these brailles Dian Xian mechanism cost is high, power hungry,
It is not readily portable.Therefore, a small power consumption, cheap, portable braille point mechanism block are developed to Braille alphabet reading device
Or braille point shows the exploitation of device and popularizes and provides with important value.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of braille points of four cam coaxials driving
Aobvious device.
The technical solution adopted by the present invention to solve the technical problems is：
The present invention includes two contact pilotage driving mechanisms, touch tablet and support frame；The identical two column contact pilotage driving mechanism of structure
It is installed between two support frames, touch tablet is mounted between two support frames；Touch tablet is equipped with contact pilotage mounting hole, often
A contact pilotage driving mechanism has four pieces of contact pilotages, the contact pilotage peace of eight pieces of contact pilotages installation of two contact pilotage driving mechanisms on a touchpad
It fills in hole.
Two contact pilotage driving mechanism structures are identical, each contact pilotage driving mechanism include four pieces of contact pilotages, four cams,
A piece camshaft and four compressed springs；Four pieces of contact pilotage upper ends are extend into the contact pilotage mounting hole of installation on a touchpad, contact pilotage
The clearance fit between contact pilotage mounting hole；Four pieces of contact pilotages are arranged along a straight line arrangement, are set with compressed spring on each contact pilotage,
Four pieces of contact pilotage lower ends remain under compressed spring effect with four upper cam surface profiles contact that respectively four cams are same
Axis is fixedly installed on camshaft, and camshaft is installed on support frame through bearing；The upper end of compressed spring is connected to the touching of touch tablet
Needle mounting hole hole surrounding end surfaces, the lower end of compressed spring are fixed on the step outstanding of contact pilotage lower end.
Stepper motor, stepper motor output shaft and the contact pilotage driving mechanism are respectively installed on two support frames
Camshaft it is coaxially connected, stepper motor drive cam shaft rotation, and then four cams of synchronous drive rotate synchronously.
The braille point shows the Braille that device shows 8 braille contacts of side；The one braille contact of side 8 it is blind
Chinese character is in upper position-arresting respectively by eight pieces of contact pilotages that four rows two arrange or lower position-arresting is formed by eight sags and crests and is arranged to make up,
Four contact pilotages of each column are by a camshaft actuated, and four contact pilotages of another column are by another camshaft actuated.
Each cam rotates a circle and is equipped with 16 stop positions uniformly at intervals, and the angular interval between adjacent stop position is 22.5
Degree, stop position are divided into upper position-arresting or lower position-arresting；All four contact pilotages in one contact pilotage driving mechanism on respective cam by stopping
The special arrangement of stop bit, 16 kinds of brailles of four braille contacts of column corresponding to lower four contact pilotages so that cam rotates a circle
Contact is shown；In two contact pilotage driving mechanisms, in two camshafts rotate a circle, controlling two contact pilotage driving mechanisms respectively makes
Two column, eight contact pilotages are collectively formed 256 kinds of braille contacts and shows, be achieved in whole groups for showing 8 braille contacts of a side
It closes.
Four cam coaxials are fixedly installed on camshaft, and during four cam synchronous rotaries, four convex
Stop position arrangement on wheel is also kept fixed and synchronous rotary.
In same contact pilotage driving mechanism, the stop position arrangement such as following table of four cams：
In upper table, 0 indicates lower position-arresting, and 1 indicates upper position-arresting.
The camshaft and cam are designed as a whole or are fixed together after separately manufactured.
Contact pilotage mounting hole corresponding with Braille number of contacts, size and arrangement shape are set on the touch tablet
Formula meets requirement of the Braille to contact sizes and spacing.
Camshaft is installed on the support frame, can be directly installed in the hole of support frame, can also be mounted on by bearing
In the hole of bracket.
Support frame as described above can also design into a single integrated structure with the touch tablet split production.
The invention has the following beneficial effects：
The contact pilotage driving mechanism that the present invention designs installs the cam coaxial of 4 different external form profiles, by the same driving
Device driving, may make up 16 stop positions, realize the 16 concave-convex presentations of 4 braille contacts, the identical two column contact pilotage driving of structure
Mechanism can form the male-female arrangement of 8 braille contacts, realize whole combinations that 8 braille contacts of a side are presented, driving method
Simply, the features such as low in energy consumption, small in size, kinematic accuracy is high, is easy to the control that braille point shows device.
Detailed description of the invention
Fig. 1 is the general assembly drawing of 8 braille contacts of side of the invention；
Fig. 2 is the structure chart of touch tablet and support frame；
Fig. 3 is the assembling relationship figure of contact pilotage, compressed spring, cam, camshaft and bearing；
Fig. 4 is the chamfered shape of 4 cams and position corresponding relationship on camshaft.
I- contact pilotage driving mechanism in figure, 1- touch tablet, 2- support frame, 3- motor installation casing, 4- stepper motor, 5,6,
7,8,9,10,11,12- contact pilotage mounting holes, 13,14- bearing mounting holes, 15,16- cam shaft mounting holes, 17,18- support frames are prominent
Rise part, 19,20- support frame groove parts, 21,22,23,24,25,26,27,28- contact pilotages, 29- compressed spring, 30,31-
Camshaft, 32,33- bearings, 34,35,36,37- cams.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The braille point of four cam coaxials driving shows device by contact pilotage driving mechanism I, touch tablet 1, the composition of support frame 2.Fig. 1
The device of the invention for being made of side's Braille eight pieces of contact pilotages is shown to Fig. 4, is specifically described below.
As shown in Figure 1, present invention specific implementation includes two contact pilotage driving mechanism I, touch tablet 1 and support frame 2；Structure
Identical two column contact pilotage driving mechanism I is installed between two support frames 2, and touch tablet 1 is mounted between two support frames 2；
Touch tablet 1 be equipped with contact pilotage mounting hole 5,6,7,8,9,10,11,12, each contact pilotage driving mechanism I have four pieces of contact pilotages 21,
22, eight pieces of contact pilotages 21,22,23,24,25,26,27,28 of 23,24,25,26,27,28, two contact pilotage driving mechanism I are installed
In eight contact pilotage mounting holes 5,6,7,8,9,10,11,12 on touch tablet 1.
As shown in figure 3, two contact pilotage driving mechanism I structures are identical, each contact pilotage driving mechanism I include four pieces of contact pilotages 21,
22,34,35,36,37, camshafts 31 and four compressed springs 29,38,39,40 of 23,24, four cams；Four pieces of contact pilotages
21,22,23,24 upper ends are extend into the contact pilotage mounting hole 5,6,7,8 being mounted on touch tablet 1, contact pilotage 21,22,23,24 with
Clearance fit between contact pilotage mounting hole 5,6,7,8；Four pieces of contact pilotages 21,22,23,24 are arranged along a straight line arrangement, with four pieces of contact pilotages pair
The four contact pilotage mounting holes 5,6,7,8 answered also are set with compression in arrangement arranged in a straight line, each contact pilotage 21,22,23,24
Spring 29,38,39,40, four pieces of 21,22,23,24 lower ends of contact pilotage exist with four 34,35,36,37 upper surface profiles of cam respectively
Compressed spring 29,38,39,40 remains contact under acting on, four cams 34,35,36,37 are coaxially fixedly installed in cam
On axis 31, camshaft 31 is installed on support frame 2 through bearing 32；The upper end of compressed spring is connected to the contact pilotage mounting hole of touch tablet 1
5,6,7,8 hole surrounding end surfaces, the lower end of compressed spring are fixed on the step outstanding of contact pilotage lower end.
Contact pilotage 21,22,23,24 can be in mounting hole 9,10,11,12 up and down under the driving of cam 34,35,36,37
Mobile, contact pilotage mounting hole plays limit and guiding role to the elevating movement of contact pilotage.29,38,39,40 envelope of compressed spring is touching
Outside needle 21,22,23,24, when assembling has been completed, template 1 is contacted in compressed spring 29,38,39,40, it is lower to connect contact pilotage lower end,
Compressed spring 29,38,39,40 is in compressive state always, plays the role of contact pilotage reset.
As shown in Figure 1, stepper motor 4 is respectively installed on two support frames 2,4 output shaft of stepper motor and contact pilotage driving machine
The camshaft 31 of structure I is coaxially connected, the rotation of 4 drive cam shaft 31 of stepper motor, and then synchronous turn of four cams of synchronous drive
It is dynamic.
As shown in Fig. 2, camshaft 30 is mounted in the hole 14 of 2 side of support frame by bearing 33, camshaft 31 passes through axis
32 are held to be mounted in the hole 13 of 2 other side of support frame, the other end of camshaft 30 and 31 be separately mounted to support frame 2 hole 15,
In 16, hole 14 and hole 15 are coaxial, and hole 13 and hole 16 are coaxial.Camshaft 30 and 31 can also use cantilever support.
In this mechanism, camshaft and cam separately manufacturing, the rotation of camshaft 30,31 are driven by stepper motor 4, are walked
Set up separately into motor 4 in the two sides of support frame 2, stepper motor 4 is connect by shaft coupling with camshaft 30,31.
As depicted in figs. 1 and 2, braille point shows the Braille that device shows 8 braille contacts of side；One braille of side 8
The Braille of contact by eight pieces of contact pilotages 21,22,23,24,25,26,27,28 that four rows two arrange be in respectively upper position-arresting or under
Stop bit is formed by eight sags and crests and is arranged to make up, and four contact pilotages 21,22,23,24 of each column are driven by a camshaft 31
Dynamic, four contact pilotages 25,26,27,28 of another column are driven by another camshaft 30.
The each cam 34,35,36,37 for being mounted on camshaft 30 rotates a circle is equipped with 16 stop positions, phase uniformly at intervals
Angular interval between adjacent stop position is 22.5 degree, and stop position is divided into upper position-arresting or lower position-arresting；Stop position refers to the surface wheel of cam
Position when exterior feature connection contact contact pilotage is static, upper position-arresting are radial further from cam center along cam compared to lower position-arresting.Contact pilotage 21,
22,23,24,25,26,27,28 are in upper position-arresting or lower position-arresting is formed by eight sags and crests respectively.
In stop position, each contact pilotage 21,22,23,24 of 34,35,36,37 top of cam is in lower position-arresting or above stops
, all four contact pilotages 21,22,23,24 in a contact pilotage driving mechanism I on respective cam 34,35,36,37 by stopping
The special arrangement of position, a column four corresponding to lower four contact pilotages 21,22,23,24 so that cam 34,35,36,37 rotates a circle
16 kinds of sags and crests of a braille contact arrange, i.e. braille contact is shown.
In two contact pilotage driving mechanism I, in two camshafts 30,31 rotate a circle, two contact pilotage driving machines are controlled respectively
Structure I makes two column, eight contact pilotages 21,22,23,24,25,26,27,28 that 256 kinds of sags and crests arrangements, i.e. braille contact be collectively formed
Display is achieved in whole combinations of display one side, 8 braille contacts.Four cams 34,35,36,37 are coaxially fixedly installed in
On camshaft 31, during four cam synchronous rotaries, the stop position arrangement on four cams 34,35,36,37 is also kept
Fixed and synchronous rotary.
As a result, the chamfered shape of four cams 34,35,36,37 on camshaft 31 has fixed arrangement relation,
16 stop positions that camshaft 31 rotates a circle, the 4 pieces of contact pilotages 21,22,23,24 for enabling it drive just constitute 16 kinds of brailles
The different arrangements of contact.Similarly, the another 4 pieces of contact pilotages 25,26,27,28 to match with camshaft 30 also constitute 16 kinds of braille contacts
Difference arrangement.
The outer profile of contact pilotage lower end and cam remains contact condition, and cam rotation drives stylus movement, make its
It moves up and down in contact pilotage mounting hole, the characteristics of motion of contact pilotage depends on the outer profile of cam and the rotation speed of cam.Work as contact pilotage
When lower end is located on the basic circle of cam, contact pilotage is in the position of lower position-arresting, when contact pilotage lower end is located at the profile that far stops of cam
When, contact pilotage is in the position of upper position-arresting.When contact pilotage is in lower position-arresting, the top of contact pilotage is lower than 1 upper surface of touch tablet, 0.1 milli
Rice, forms a concave point of Braille, when contact pilotage is in upper position-arresting, is higher by plane 0.5 on touch tablet 1 at the top of contact pilotage
Millimeter, forms a salient point of Braille.
In apparatus of the present invention, compressed spring shares 8, and envelope is in contact pilotage 21,22,23,24,25,26,27,28 respectively
It is external.
It is the salient point corresponding when being in upper position-arresting or lower position-arresting position respectively by eight pieces of contact pilotages of one side's Braille, recessed
It presses four rows two column to rearrange, can be formed by multiple " sides " are side-by-side by the required amount of braille of design requirement
The aobvious device of point.
Contact pilotage mounting hole 5,6,7,8,9,10,11,12 corresponding with Braille points, the touching are set on touch tablet 1
The size and arrangement form of needle mounting hole meets requirement of the Braille to braille contact sizes and spacing, and each braille point is aobvious
Mechanism is " side " Braille.
The cam quantity being arranged on every camshaft is half " side ", and the spacing of cam is equal and with contact pilotage mounting hole
Spacing is corresponding, and the maximum lift of cam is slightly larger than the maximum height of braille contact.
Cam, which rotates a circle, 16 stop positions, and the interval angles of each stop position are 22.5 degree.To make blind person touch touching
Feel clear and legible when point, camshaft 30,31 positions stopped every time should be such that every piece of contact pilotage is at only under cam effect
Position or lower position-arresting position.
Further, the profile of 4 cams on every camshaft must have stringent shape and fixed position relative,
Most representative one group of cam profile and relative positional relationship are shown in mechanism, as shown in Fig. 4, cam rotation
One week 16 stop position, four pieces of contact pilotages for just driving it are formed by braille contact and complete 16 kinds of different arrangements.Its
Feature is that cam 34 has a lift and backhaul, wherein eight adjacent stop positions are on basic circle, separately adjacent eight
Stop position, which is in, far stops on profile, and lift angle and backhaul angle are 22.5 degree；There are two lift and backhauls for cam 35, wherein
There are two adjacent stop positions and six adjacent stop positions to be on basic circle, while there are two adjacent stop position and six
Adjacent stop position, which is in, far stops on profile, and lift angle and backhaul angle are 22.5 degree；Cam 36 is there are two lift and returns
Journey is provided with adjacent stop position four on basic circle, three stop positions and five stoppings adjacent on profile of far stopping of ining succession
Position, the adjacent stop position on the basic circle of another part are also in succession three stop positions for far stopping adjacent on profile and five are stopped
Stop bit, lift angle and backhaul angle are 22.5 degree；There are three lift and backhauls for cam 37, wherein there is two groups of two adjacent stoppings
On generating circle, two groups of two adjacent stop positions, which are in, far stops on profile for position, is located at there are also one group of four adjacent stop position
On basic circle and one group of four adjacent stop position is positioned at far stopping on profile, and lift angle and backhaul angle are 22.5 degree.
As shown in table 1, in table 1, " 1 " represents cam and far stops profile, i.e. upper position-arresting for the feature performance of Fig. 4, " 0 " generation
The basic circle of table cam contour, i.e. lower position-arresting.Row in table 1 indicates that cam contour point corresponding to 16 stop positions of camshaft is special
It levies, the column in table 1 indicate four cam contour point features corresponding to each stop position of cam.
Corresponding, the motion state of contact pilotage also shows in table 2, and "●" indicates the convex of Braille in table 2
Point, "○" indicate the concave point of Braille.
Table 1
Table 2
| Contact 1 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ● | ● | ● | ● | ● | ● | ● | ● |
| Contact 2 | ● | ● | ○ | ○ | ● | ● | ○ | ○ | ○ | ○ | ○ | ○ | ● | ● | ● | ● |
| Contact 3 | ● | ● | ● | ○ | ○ | ○ | ○ | ● | ● | ● | ○ | ○ | ○ | ○ | ● | ● |
| Contact 4 | ● | ○ | ○ | ○ | ○ | ● | ● | ● | ● | ○ | ○ | ● | ● | ○ | ○ | ● |
It should be pointed out that four cams are arranged in order in cam in Fig. 4 and in corresponding table 1
On axis.Fig. 4 (a)~Fig. 4 (d) respectively represents the stopping bit distribution of cam 34,35,36,37.In the specific implementation, described convex
Wheel 34,35,36,37 putting in order on camshaft can arbitrarily exchange, be formed by braille contact put in order also with
Change.
Above-mentioned specific embodiment is used to illustrate the present invention, rather than limits the invention, of the invention
In spirit and scope of protection of the claims, to any modifications and changes that the present invention makes, protection model of the invention is both fallen within
It encloses.
Claims (8)
1. a kind of braille point of four cam coaxials driving shows device, it is characterised in that：Including two contact pilotage driving mechanisms (I), touching
Template (1) and support frame (2)；The identical two column contact pilotage driving mechanism (I) of structure is installed between two support frames (2), touching
Template (1) is mounted between two support frames (2)；Touch tablet (1) is equipped with contact pilotage mounting hole (5,6,7,8,9,10,11,12),
Each contact pilotage driving mechanism (I) has four pieces of contact pilotages (21,22,23,24,25,26,27,28), two contact pilotage driving mechanisms (I)
Eight pieces of contact pilotages (21,22,23,24,25,26,27,28) be mounted on touch tablet (1) contact pilotage mounting hole (5,6,7,8,9,
10,11,12) in.
2. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterised in that：Two contact pilotages
Driving mechanism (I) structure is identical, and each contact pilotage driving mechanism (I) includes four pieces of contact pilotages (21,22,23,24), four cams
(34,35,36,37), a camshaft (31) and four compressed springs (29,38,39,40)；Four pieces of contact pilotages (21,22,23,24)
Upper end is extend into the contact pilotage mounting hole (5,6,7,8) being mounted on touch tablet (1), and contact pilotage (21,22,23,24) and contact pilotage are pacified
Fill clearance fit between hole (5,6,7,8)；Four pieces of contact pilotages (21,22,23,24) are arranged along a straight line arrangement, each contact pilotage (21,22,
23,24) on be set with compressed spring (29,38,39,40), four pieces of contact pilotage (21,22,23,24) lower ends respectively with four cams
(34,35,36,37) upper surface profile remains contact in the case where compressed spring (29,38,39,40) act on, four cams (34,
35, it 36,37) is coaxially fixedly installed on camshaft (31), camshaft (31) is installed on support frame (2) through bearing (32)；Compression
The upper end of spring is connected to contact pilotage mounting hole (5,6,7,8) hole surrounding end surfaces of touch tablet (1), and the lower end of compressed spring is fixed on
On the step outstanding of contact pilotage lower end.
3. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterised in that：Described two
It is respectively equipped with stepper motor (4) on a support frame (2), the cam of stepper motor (4) output shaft and the contact pilotage driving mechanism (I)
Axis (31) is coaxially connected, stepper motor (4) drive cam shaft (31) rotation, and then four cams of synchronous drive rotate synchronously.
4. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterized in that：
The braille point shows the Braille that device shows 8 braille contacts of side；The Braille of one 8 braille contacts of side
The eight pieces of contact pilotages (21,22,23,24,25,26,27,28) arranged by four rows two are in upper position-arresting respectively or lower position-arresting is formed by eight
A sags and crests are arranged to make up, and four contact pilotages (21,22,23,24) of each column are driven by a camshaft (31), and the four of another column
A contact pilotage (25,26,27,28) is driven by another camshaft (30).
5. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterized in that：
Each cam (34,35,36,37) rotates a circle and is equipped with 16 stop positions uniformly at intervals, the interval between adjacent stop position
Angle is 22.5 degree, and stop position is divided into upper position-arresting or lower position-arresting；In one contact pilotage driving mechanism (I) all four contact pilotages (21,
22,23,24) by the special arrangement of respective cam (34,35,36,37) on stop position, so that cam (34,35,36,37) revolves
Circle 16 kinds of braille contacts of four braille contacts of column corresponding to lower four contact pilotages (21,22,23,24) are shown；
In two contact pilotage driving mechanisms (I), in two camshafts (30,31) rotate a circle, two contact pilotage driving machines are controlled respectively
Structure (I) two column, eight contact pilotages (21,22,23,24,25,26,27,28) that 256 kinds of braille contacts be collectively formed to show, thus
Realize whole combinations of display one side, 8 braille contacts.
6. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterized in that：
Four cams (34,35,36,37) are coaxially fixedly installed on camshaft (31), in four cam synchronous rotaries
In the process, the stop position arrangement on four cams (34,35,36,37) is also kept fixed and synchronous rotary.
7. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterized in that：
In same contact pilotage driving mechanism (I), the stop position arrangement such as following table of four cams (34,35,36,37)：
In upper table, 0 indicates lower position-arresting, and 1 indicates upper position-arresting.
8. a kind of braille point of four cam coaxials driving according to claim 1 shows device, it is characterised in that：The cam
Axis (31) and cam (34,35,36,37) are designed as a whole or are fixed together after separately manufactured.
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|---|---|---|---|
| CN201810732692.7A CN108831259A (en) | 2018-07-05 | 2018-07-05 | The braille point of four cam coaxials driving shows device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810732692.7A CN108831259A (en) | 2018-07-05 | 2018-07-05 | The braille point of four cam coaxials driving shows device |
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| CN201810732692.7A Pending CN108831259A (en) | 2018-07-05 | 2018-07-05 | The braille point of four cam coaxials driving shows device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696409A (en) * | 2019-03-12 | 2020-09-22 | 南开大学 | Synchronous belt transmission type braille point display structure |
| CN111752408A (en) * | 2020-06-03 | 2020-10-09 | 清华大学 | Tactile 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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