CN111402686A - Cam piston type braille point display - Google Patents
Cam piston type braille point display Download PDFInfo
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- CN111402686A CN111402686A CN202010384879.XA CN202010384879A CN111402686A CN 111402686 A CN111402686 A CN 111402686A CN 202010384879 A CN202010384879 A CN 202010384879A CN 111402686 A CN111402686 A CN 111402686A
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- cam
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- point display
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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
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- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a cam piston type braille point display, which comprises a base contacted with a workbench, wherein a support frame is arranged at the rear side of the upper end surface of the base, a contact chamber is arranged above the support frame, the middle parts of the front and rear end surfaces of the support frame are in clearance fit with a positioning shaft, the front and rear parts of the positioning shaft are respectively connected with two armature crank block mechanisms in a sliding way, the front and rear ends of the positioning shaft are nested with shaft end check rings, a cam piston mechanism is arranged above the armature crank block mechanisms, the upper end of the cam piston mechanism is connected with the contact chamber in a sliding way, a contact is fixed on the upper end surface of the cam piston mechanism, the base is fixedly connected with the support frame through a fastening bolt, an electromagnetic piston type braille point display which realizes point display by utilizing a cam and a piston structure can be combined and placed according to a lattice, therefore, the Braille display device which has simple structure, small displacement, high refreshing frequency and can generate enough supporting force can be formed.
Description
Technical Field
The invention relates to the technical field of touch reappearance, in particular to a cam piston type braille point display.
Background
The touch reappearance is an important component of the virtual reality technology, and the Braille point display is one of important applications of touch reappearance research, can provide barrier-free Braille resources for the blind, and enables the blind to enjoy the fun of reading books. The braille for the blind specially designed for the blind consists of 6 contacts with fixed distance, and is called a square. The three rows and two columns are arranged, the left side is 1, 2 and 3 points from top to bottom, and the right side is 4, 5 and 6 points. The shape of the contact is generally hemispherical, the diameter is 1.0-1.6 mm, and the height of the protrusion is 0.2-0.5 mm. The dot pitch is 2.2-2.8 mm, the square pitch is 3.5-4.0mm, and the line pitch is 5.0-6.0 mm. The initials, the finals and the tones of a Chinese braille character respectively occupy one party, three parties are needed for displaying the Chinese braille character, and 18 braille contacts are needed.
China is the country with the most blind people in the world, blind people with visual loss are unfortunate, and blind people who do not know braille are even unfortunate. Internationally, blind people who do not know braille are also called illiterates, and are greatly limited in life and employment. For a long time, the quantity of the paper braille book sets is small, the varieties are single, the information is lagged, the volume is large and heavy, the circulation is not smooth, the blind person can not hold the paper braille book sets easily, the use is inconvenient, and the overall improvement of the group culture level of the blind person is greatly limited. The existing point display technology can only realize the display function of a single point or a single side mostly due to the problems of large structure size, complex preparation process of novel functional materials, various external devices and the like.
The disadvantage that exists to current device improves, provides a cam piston braille point display now.
Disclosure of Invention
The invention aims to provide a cam piston type braille point display to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a cam piston braille point display, includes the base with the workstation upper contact, the support frame is installed to base up end rear side, the contact cavity is installed to the support frame top, terminal surface middle part adopts clearance fit with the location axle around the support frame, location axle front and back side respectively with two armature crank block mechanism sliding connection, location axle front and back end nestification has the axle head retaining ring, armature crank block mechanism top is provided with cam piston mechanism, cam piston mechanism upper end and contact cavity sliding connection, cam piston mechanism up end is fixed with the contact, the base passes through fastening bolt fixed connection with the support frame, the support frame passes through fastening bolt fixed connection with the contact cavity, electromagnetic mechanism is installed to base up end both sides.
As a further scheme of the invention: the electromagnetic mechanism is characterized in that two counter bores A are formed in the lower end face of the base in four directions, rectangular grooves are formed in two sides of the upper end face of the base respectively, four threaded through holes are uniformly distributed in the rectangular grooves, and the electromagnetic mechanism is installed in the rectangular grooves and fixed with the threaded through holes through fastening bolts.
As a further scheme of the invention: the support frame adopts U template and shrouding to constitute, two screw hole A have been opened respectively to terminal surface both sides before the U template, end surface both sides are opened before the shrouding has two counter sink B, fastening bolt passes counter sink B and screw hole A and passes through screw thread fixed connection, terminal surface is opened threaded hole B under U template and the shrouding, fastening bolt passes counter sink A and passes through screw thread fixed connection with threaded hole B, threaded hole C is opened to U template and shrouding up end, shaft hole A has all been opened at terminal surface middle part around U template and the shrouding, shaft hole A adopts interference fit with location axle both ends.
As a further scheme of the invention: the positioning shaft is an optical shaft with annular grooves symmetrically distributed on a cylindrical surface, and shaft end check rings are nested on the annular grooves beside the U-shaped plate and the sealing plate.
As a further scheme of the invention: two countersunk holes C are formed in the upper end face of the contact chamber in four directions, and the fastening bolts penetrate through the countersunk holes C and are fixedly connected with the threaded holes C through threads.
As a further scheme of the invention: the contact cavity is characterized in that guide holes are formed in the left side and the right side of the lower end face of the contact cavity, a position avoiding hole is formed above the guide holes, and the position avoiding hole is in clearance fit with the contact.
According to the further scheme, the armature crank block mechanism comprises a crank block, an L type armature and a connecting bolt, a shaft hole B is formed above the L type armature, the shaft hole B is in clearance fit with a positioning shaft, shaft end check rings are nested on the positioning shaft on two sides of the L type armature, a threaded hole D is formed in the center of a cross beam at the bottom of the L type armature, a countersunk hole D is formed in the crank block, and the connecting bolt penetrates through the countersunk hole D and is fixedly connected with the threaded hole D through threads.
As a further scheme of the invention: cam piston mechanism is opened connecting axle, cam, straight line groove cylinder, the axle head retaining ring that has the spacing groove by both ends and is constituteed, straight line groove cylinder top is provided with the direction cylinder, the direction cylinder adopts clearance fit with the guiding hole, straight line groove cylinder is provided with straight line groove to open a straight line groove both sides has shaft hole B, shaft hole B adopts clearance fit with the connecting axle, straight line inslot is provided with the cam, the cam adopts clearance fit with the connecting axle, the connecting axle has the axle head retaining ring at a straight line groove outer wall nestification.
As a further scheme of the invention: the circular cam at the bottom of the cam piston mechanism is directly placed on the concave surface of the crank block.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable design, the contact chamber has a limiting function, the guide cylinder is arranged above the straight groove cylinder, the guide cylinder and the guide hole are in clearance fit to play a limiting function, the straight groove cylinder is prevented from deviating, the contact above the guide cylinder moves upwards to form Braille convex points with certain height, each character point has an independent function, the character convex points at different positions are combined to form Braille characters, and the electromagnetic piston type point display device realizes the point display function by utilizing the cam and piston structure.
Drawings
FIG. 1 is a schematic diagram of an axial structure according to the present invention.
Fig. 2 is a partial structural schematic diagram of the present invention.
Fig. 3 is a front sectional structural view of the present invention.
Fig. 4 is a schematic structural view of an armature crank block mechanism according to the present invention.
Fig. 5 is a schematic structural view of the cam-piston mechanism of the present invention.
Wherein: the device comprises a base 1, a support frame 2, a contact chamber 3, a contact 4, a positioning shaft 5, a fastening bolt 6, an armature crank block mechanism 7, a cam piston mechanism 8, an electromagnetic mechanism 9 and a shaft end retainer ring 10;
a slotted cylinder 801, a cam 802 and a connecting shaft 803.
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 1
Referring to fig. 1-5, in the embodiment of the present invention, a cam piston type braille display device includes a base 1 contacting with a workbench for supporting the whole device, a support frame 2 is installed on the rear side of the upper end surface of the base 1 for building the whole device, a contact chamber 3 is installed above the support frame 2, the contact chamber 3 has a limiting function, the middle parts of the front and rear end surfaces of the support frame 2 are in clearance fit with a positioning shaft 5, the front and rear parts of the positioning shaft 5 are respectively connected with two armature crank block mechanisms 7 in a sliding manner, the armature crank block mechanisms 7 are used for a conversion structure of magnetic force and action displacement, the front and rear ends of the positioning shaft 5 are nested with shaft end check rings 10, the shaft end check rings 10 are used for limiting the mechanisms, a cam piston mechanism 8 is arranged above the armature crank block mechanisms 7, and the cam piston mechanism 8 is used for a main mechanism for forming braille characters, touch and read the literal information for the blind person, 8 upper ends of cam piston mechanism and 3 sliding connection of contact cavity, 8 up end of cam piston mechanism are fixed with contact 4, base 1 passes through fastening bolt 6 fixed connection with support frame 2, support frame 2 passes through fastening bolt 6 fixed connection with contact cavity 3, electromagnetic mechanism 9 is installed to 1 up end both sides of base, electromagnetic mechanism 9 is used for the electromagnetic characteristic of self to convert alternating voltage into magnetic force.
All opened two counter sink A on four directions on the terminal surface under base 1, open respectively base 1 up end both sides has the rectangle recess, four screw thread through-holes of equipartition in the rectangle recess, electromagnetic mechanism 9 is installed in the rectangle recess to it is fixed with the screw thread through-hole through fastening bolt 6, electromagnetic mechanism 9 is used for the electromagnetic characteristic of self to convert alternating voltage into magnetic force.
The positioning shaft 5 is an optical axis with annular grooves symmetrically distributed on a cylindrical surface, shaft end check rings 10 are nested on the annular grooves beside the U-shaped plate and the sealing plate, and the shaft end check rings 10 prevent the positioning shaft 5 from axially deviating and sliding.
Two countersunk holes C are formed in the four directions of the upper end face of the contact chamber 3, and the fastening bolt 6 penetrates through the countersunk hole C to be fixedly connected with the threaded hole C through threads.
The contact device is characterized in that guide holes are formed in the left side and the right side of the lower end face of the contact chamber 3 and play a role in guiding, a avoiding hole is formed above the guide holes and is in clearance fit with the contact 4, and the contact 4 moves up and down in the avoiding hole.
Example 2
Armature crank block mechanism 7 includes crank block 701, L type armature 702 and connecting bolt 703, open L type armature 702 top has shaft hole B, shaft hole B adopts clearance fit with location axle 5, the nested axle head retaining ring 10 that has on the location axle 5 of L type armature 702 both sides, axle head retaining ring 10 prevents L type armature 702 and produces the axial skew slip, L type armature 702 bottom crossbeam center department opens threaded hole D, crank block 701 has opened counter bore D, connecting bolt 703 passes counter bore D and threaded hole D and passes through screw thread fixed connection.
The circular cam 802 at the bottom of the cam-piston mechanism 8 is placed directly on the concave surface of the crank block 701.
The working principle of the invention is that when the cam piston type braille dot display is used, an electromagnetic mechanism 9 converts alternating voltage into magnetic force by means of the electromagnetic property of the electromagnetic mechanism 9, the alternating voltage is attracted to provide power for the device under the matching action of an L type armature 702, the electromagnetic mechanism 9 is a small electromagnetic coil which is wound automatically and can generate enough magnetic force to adsorb the L type armature 702, the L type armature 702 rotates to one side of the electromagnetic mechanism 9 relative to a positioning shaft 5, so that a crank block 701 is driven to swing to one side of the electromagnetic mechanism 9, a circular cam 802 is directly placed on a concave surface of the crank block 701 and drives the circular cam 802 to swing along with the crank block 701, a contact chamber 3 has a limiting effect, a guide cylinder is arranged above a cylinder 801 of a word groove, the guide cylinder and a guide hole are in clearance fit to play a limiting effect, the cylinder 801 cannot deflect, a contact 4 above the guide cylinder moves upwards to form braille bumps with a certain height, each character dot acts independently, and the braille characters at different positions are combined to form braille characters, so that a braille display module with two-point independent.
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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The cam piston type braille point display device comprises a base (1) which is contacted with a workbench, and is characterized in that a support frame (2) is installed on the rear side of the upper end face of the base (1), a contact chamber (3) is installed above the support frame (2), the middle part of the front end face and the rear end face of the support frame (2) are in clearance fit with a positioning shaft (5), the front and the rear of the positioning shaft (5) are respectively in sliding connection with two armature crank block mechanisms (7), shaft end check rings (10) are nested at the front and the rear ends of the positioning shaft (5), a cam piston mechanism (8) is arranged above the armature crank block mechanisms (7), the upper end of the cam piston mechanism (8) is in sliding connection with the contact chamber (3), a contact (4) is fixed on the upper end face of the cam piston mechanism (8), and the base (1) is fixedly connected with the support frame (2) through a fastening, the support frame (2) is fixedly connected with the contact chamber (3) through a fastening bolt (6), and electromagnetic mechanisms (9) are installed on two sides of the upper end face of the base (1).
2. The cam piston type braille point display of claim 1, characterized in that two counter bores a are formed in four directions on the lower end surface of the base (1), rectangular grooves are formed on two sides of the upper end surface of the base (1) respectively, four threaded through holes are uniformly distributed in the rectangular grooves, and the electromagnetic mechanism (9) is installed in the rectangular grooves and fixed with the threaded through holes through fastening bolts (6).
3. The cam piston type braille point display of claim 1, characterized in that the support frame (2) is composed of a U-shaped plate and a sealing plate, two threaded holes a are respectively opened on two sides of the front end face of the U-shaped plate, two counter bores B are opened on two sides of the front end face of the sealing plate, the fastening bolt (6) penetrates the counter bores B to be fixedly connected with the threaded holes a through threads, the threaded holes B are opened on the lower end faces of the U-shaped plate and the sealing plate, the fastening bolt (6) penetrates the counter bores a to be fixedly connected with the threaded holes B through threads, the threaded holes C are opened on the upper end faces of the U-shaped plate and the sealing plate, shaft holes a are opened in the middle portions of the front end faces and the rear end faces of the U-shaped plate and the sealing plate, and the shaft holes.
4. The cam piston type braille point display of claim 3, characterized in that the positioning shaft (5) is an optical shaft with annular grooves symmetrically distributed on a cylindrical surface, and the annular grooves beside the U-shaped plate and the sealing plate are nested with shaft end retainer rings (10).
5. The cam piston type braille point display of claim 3, characterized in that two counter bores C are formed in four directions on the upper end surface of the contact chamber (3), and the fastening bolt (6) passes through the counter bores C and is fixedly connected with the threaded hole C through threads.
6. The cam piston type braille point display of claim 1, characterized in that the left and right sides of the lower end surface of the contact chamber (3) are provided with guide holes, a spacing hole is arranged above the guide holes, and the spacing hole is in clearance fit with the contact (4).
7. The cam piston type braille point display of claim 5, characterized in that, armature crank block mechanism (7) includes crank block (701), L type armature (702) and connecting bolt (703), open shaft hole B above L type armature (702), shaft hole B adopts clearance fit with location axle (5), nested shaft end retaining ring (10) on location axle (5) of L type armature (702) both sides, open threaded hole D in L type armature (702) bottom crossbeam center department, crank block (701) are opened there is counterbore D, connecting bolt (703) pass through counterbore D and threaded hole D and pass through screw thread fixed connection.
8. The cam piston type braille point display of claim 7, characterized in that the cam piston mechanism (8) comprises a connecting shaft (803) with two ends provided with limiting grooves, a cam (802), a straight groove cylinder (801) and a shaft end retainer ring (10), a guide cylinder is arranged above the straight groove cylinder (801), the guide cylinder and a guide hole are in clearance fit, the straight groove cylinder (801) is provided with a straight groove, two sides of the straight groove are provided with shaft holes B, the shaft holes B and the connecting shaft (803) are in clearance fit, the straight groove is internally provided with the cam (802), the cam (802) and the connecting shaft (803) are in clearance fit, and the connecting shaft (803) is nested with the shaft end retainer ring (10) at the outer wall of the straight groove.
9. Cam-piston braille display according to claim 8, characterized in that the circular cam (802) at the bottom of the cam-piston mechanism (8) rests directly on the concave surface of the crank block (701).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384879.XA CN111402686B (en) | 2020-05-09 | 2020-05-09 | Cam piston type braille point display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384879.XA CN111402686B (en) | 2020-05-09 | 2020-05-09 | Cam piston type braille point display |
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| CN111402686A true CN111402686A (en) | 2020-07-10 |
| CN111402686B CN111402686B (en) | 2022-09-20 |
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| CN202010384879.XA Active CN111402686B (en) | 2020-05-09 | 2020-05-09 | Cam piston type braille point display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112258943A (en) * | 2020-11-11 | 2021-01-22 | 长春大学 | Piezoelectric cantilever pneumatic braille point display |
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| CN112258943A (en) * | 2020-11-11 | 2021-01-22 | 长春大学 | Piezoelectric cantilever pneumatic braille point display |
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| CN111402686B (en) | 2022-09-20 |
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