CN111402686B - A cam piston type braille display - Google Patents

Abstract

The invention discloses a cam-piston type braille point display, comprising a base in contact with a workbench, a support frame is installed on the rear side of the upper end face of the base, and a contact chamber is installed above the support frame, so the The middle part of the front and rear surfaces of the support frame and the positioning shaft adopt clearance fit, the front and rear of the positioning shaft are respectively slidably connected with two armature crank block mechanisms, the front and rear ends of the positioning shaft are nested with shaft end retaining rings, and the armature crank block mechanism A cam-piston mechanism is arranged above, the upper end of the cam-piston mechanism is slidably connected with the contact chamber, a contact is fixed on the upper end surface of the cam-piston mechanism, and the base and the support frame are fixedly connected by fastening bolts. The piston structure realizes the point display effect of the electromagnetic piston type point display device. The structure can be combined and placed according to the Braille dot matrix arrangement to realize the multi-square and multi-row display of Braille characters. Therefore, it can form a simple structure, small displacement, high refresh frequency, A braille display that produces enough support.

Description

A cam piston type braille display

technical field

The invention relates to the technical field of tactile reproduction, in particular to a cam piston type Braille point display.

Background technique

Tactile reproduction is an important part of virtual reality technology. Braille dot display is one of the important applications of tactile reproduction research, which can provide blind Braille resources for blind people to enjoy reading. Braille, specially designed for the blind, consists of 6 contacts at a fixed distance, called a side. Arranged in three rows and two columns, the left side is 1, 2, 3 points from top to bottom, and the right side is 4, 5, 6 points. The shape of the contact is usually hemispherical, the diameter is 1.0-1.6mm, and the height of the protrusion is 0.2-0.5mm. The point spacing is 2.2-2.8mm, the square spacing is 3.5-4.0mm, and the line spacing is 5.0-6.0mm. The initials, finals and tones of a Chinese Braille character each occupy one side. To display a Chinese Braille character requires three parties and 18 Braille contacts.

my country is the country with the largest number of blind people in the world. Blind people who lack vision are already very unfortunate, and blind people who do not know Braille are even more unfortunate. Internationally, blind people who do not know Braille are also called illiterate, and both life and employment are subject to great restrictions. For a long time, due to the small number of paper Braille collections, the single variety, the lag in information, the large size and cumbersomeness, and the poor circulation, it is not only difficult for the blind to support, but also very inconvenient to use, which greatly limits the cultural level of the blind group. overall improvement. Most of the existing point display technologies can only achieve a single point or single display function due to problems such as large structure size, complicated preparation process of new functional materials, and numerous external devices.

Aiming at the drawbacks of the existing device, a cam-piston type braille point display is now provided.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a cam-piston type braille display to solve the above-mentioned problems in the background art.

To achieve the above object, the present invention provides the following technical solutions:

A cam-piston type braille display, comprising a base in contact with a worktable, a support frame is installed on the rear side of an upper end face of the base, a contact chamber is installed above the support frame, and a front and rear of the support frame are installed The middle part of the end face and the positioning shaft adopt clearance fit, the front and rear of the positioning shaft are respectively slidably connected with the two armature crank block mechanisms, the front and rear ends of the positioning shaft are nested with shaft end retaining rings, and a cam is arranged above the armature crank block mechanism Piston mechanism, the upper end of the cam-piston mechanism is slidingly connected with the contact chamber, the contact point is fixed on the upper end surface of the cam-piston mechanism, the base and the support frame are fixedly connected by fastening bolts, and the support frame and the contact The chambers are fixedly connected by fastening bolts, and electromagnetic mechanisms are installed on both sides of the upper end face of the base.

As a further solution of the present invention: two countersunk holes A are opened in four directions on the lower end surface of the base, rectangular grooves are respectively opened on both sides of the upper end surface of the base, and the rectangular grooves are Four threaded through holes are arranged, the electromagnetic mechanism is installed in the rectangular groove, and is fixed by fastening bolts and threaded through holes.

As a further solution of the present invention: the support frame is composed of a U-shaped plate and a sealing plate, two threaded holes A are respectively opened on both sides of the front end surface of the U-shaped plate, and two threaded holes A are opened on both sides of the front end surface of the sealing plate. There are countersunk holes B, the fastening bolts pass through the countersunk holes B and are fixedly connected with the threaded holes A through threads, the U-shaped plate and the lower end surface of the sealing plate are provided with threaded holes B, and the fastening bolts pass through the countersunk holes B. The head hole A and the threaded hole B are fixedly connected by threads, the U-shaped plate and the sealing plate are provided with a threaded hole C on the upper surface, and the middle of the front and rear surfaces of the U-shaped plate and the sealing plate are provided with a shaft hole A, and the shaft hole A and the two ends of the positioning shaft use an interference fit.

As a further solution of the present invention, the positioning axis is an optical axis with annular grooves symmetrically distributed on the cylindrical surface, and shaft end retaining rings are nested on the annular grooves next to the U-shaped plate and the sealing plate.

As a further solution of the present invention, two countersunk holes C are opened in four directions on the upper end face of the contact chamber, and the fastening bolts pass through the countersunk holes C and are fixedly connected with the threaded holes C by threads.

As a further solution of the present invention, guide holes are formed on the left and right sides of the lower end face of the contact chamber, and avoidance holes are formed above the guide holes, and the avoidance holes and the contacts adopt clearance fit.

As a further solution of the present invention: the armature crank block mechanism includes a crank block, an L-shaped armature and a connecting bolt, a shaft hole B is opened above the L-shaped armature, and the shaft hole B and the positioning shaft adopt clearance fit, the Shaft end retaining rings are nested on the positioning shafts on both sides of the L-shaped armature, a threaded hole D is opened at the center of the beam at the bottom of the L-shaped armature, a countersunk hole D is opened on the crank block, and the connecting bolt passes through the countersunk. The head hole D and the threaded hole D are fixedly connected by threads.

As a further solution of the present invention: the cam piston mechanism is composed of a connecting shaft with limiting grooves at both ends, a cam, a slotted cylinder, and a shaft end retaining ring, a guide cylinder is arranged above the slotted cylinder, and the The guide cylinder and the guide hole adopt clearance fit, the slot cylinder is provided with a slot, and there are shaft holes B on both sides of the slot, and the shaft hole B and the connecting shaft adopt clearance fit, and the slot inside A cam is provided, the cam and the connecting shaft adopt clearance fit, and the connecting shaft is nested with a shaft end retaining ring on the outer wall of the in-line groove.

As a further solution of the present 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 beneficial effects of the present invention are: the design of the present invention is reasonable, the contact chamber itself has a limiting function, a guide cylinder is arranged above the slot cylinder, and the guide cylinder and the guide hole are The clearance fit plays the role of limit, ensuring that the slotted cylinder will not shift, and the contact above the guide cylinder moves upward to form a certain height of Braille bumps, each character point acts independently, and the characters at different positions After the bumps are combined, Braille characters are formed, and the cam and piston structure is used to realize the electromagnetic piston-type point display. This structure can be combined and placed according to the Braille dot matrix arrangement to realize the multi-square and multi-row display of Braille characters, so it can form a single display. A braille point display with simple structure, small displacement, high refresh rate, and sufficient supporting force.

Description of drawings

FIG. 1 is a schematic diagram of the axonometric structure of the present invention.

FIG. 2 is a schematic diagram of a partial structure of the present invention.

FIG. 3 is a schematic view of the front sectional structure of the present invention.

FIG. 4 is a schematic structural diagram of the armature crank block mechanism in the present invention.

FIG. 5 is a schematic structural diagram of the cam-piston mechanism in the present invention.

Among them: base 1, support frame 2, contact chamber 3, contact 4, positioning shaft 5, fastening bolt 6, armature crank block mechanism 7, cam piston mechanism 8, electromagnetic mechanism 9, shaft end retaining ring 10;

Crank block 701, L-shaped armature 702, connecting bolt 703;

Slotted cylinder 801 , cam 802 , connecting shaft 803 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Please refer to FIGS. 1-5. In an embodiment of the present invention, a cam-piston type braille display includes a base 1 in contact with a worktable for supporting the entire device. The upper end of the base 1 is at the rear side. A support frame 2 is installed for the construction of the whole device. A contact chamber 3 is installed above the support frame 2, and the contact chamber 3 has a limiting function. The middle of the front and rear surfaces of the support frame 2 is connected to the positioning shaft 5. Using clearance fit, the positioning shaft 5 is slidably connected with two armature crank block mechanisms 7 at the front and rear respectively. The armature crank block mechanism 7 is used for the conversion structure of magnetic force and movement displacement. The front and rear ends of the positioning shaft 5 are nested. There is a shaft end retaining ring 10, the shaft end retaining ring 10 is used for the limit of the mechanism, and a cam-piston mechanism 8 is arranged above the armature crank block mechanism 7, and the cam-piston mechanism 8 is used for the main mechanism of Braille character formation. , for the blind to read the text information, the upper end of the cam piston mechanism 8 is slidably connected with the contact chamber 3, the contact 4 is fixed on the upper end surface of the cam piston mechanism 8, and the base 1 and the support frame 2 are tightened The fixing bolts 6 are fixedly connected, the support frame 2 and the contact chamber 3 are fixedly connected by the tightening bolts 6, and electromagnetic mechanisms 9 are installed on both sides of the upper end surface of the base 1, and the electromagnetic mechanisms 9 are used for their own electromagnetic The characteristic converts alternating voltage into magnetic force.

Two countersunk holes A are opened on the lower end surface of the base 1 in four directions, and rectangular grooves are respectively opened on both sides of the upper end surface of the base 1, and four threaded holes are evenly distributed in the rectangular grooves. The electromagnetic mechanism 9 is installed in the rectangular groove, and is fixed by the fastening bolt 6 and the threaded through hole. The electromagnetic mechanism 9 uses its own electromagnetic characteristics to convert the alternating voltage into magnetic force.

The support frame 2 is composed of a U-shaped plate and a sealing plate. Two threaded holes A are respectively opened on both sides of the front end surface of the U-shaped plate, and two countersunk holes B are opened on both sides of the front end surface of the sealing plate. The fastening bolts 6 pass through the countersunk hole B and are connected with the threaded hole A through threads, the lower end surfaces of the U-shaped plate and the sealing plate are provided with threaded holes B, and the fastening bolts 6 pass through the countersunk hole A and the threaded hole B. Threaded holes B are fixedly connected by threads, threaded holes C are opened on the end surfaces of the U-shaped plate and the sealing plate, and shaft holes A are opened in the middle of the front and rear surfaces of the U-shaped plate and the sealing plate, and the shaft holes A are connected to the positioning shaft. 5 Use an interference fit at both ends.

The positioning shaft 5 is an optical axis symmetrically distributed with annular grooves on a cylindrical surface. A shaft end retaining ring 10 is nested on the annular groove beside the U-shaped plate and the sealing plate. The shaft end retaining ring 10 The positioning shaft 5 is prevented from axially offset sliding.

The upper end face of the contact chamber 3 is provided with two countersunk holes C in four directions, and the fastening bolts 6 pass through the countersunk holes C and are fixedly connected with the threaded holes C by threads.

There are guide holes on the left and right sides of the lower end surface of the contact chamber 3, the guide holes play a guiding role, and there are avoidance holes above the guide holes, and the avoidance holes and the contacts 4 adopt clearance fit , for the contact 4 to move up and down in the escape hole.

Example 2

The armature crank block mechanism 7 includes a crank block 701, an L-shaped armature 702 and a connecting bolt 703. A shaft hole B is formed above the L-shaped armature 702. Shaft end retaining rings 10 are nested on the positioning shafts 5 on both sides of the armature 702. The retaining rings 10 prevent the L-shaped armature 702 from sliding axially. Threaded hole D, the crank block 701 is provided with a countersunk hole D, and the connecting bolt 703 passes through the countersunk hole D and is fixedly connected with the threaded hole D by threading.

The cam piston mechanism 8 is composed of a connecting shaft 803 with limiting grooves at both ends, a cam 802, a slotted cylinder 801, and a shaft end retaining ring 10. A guide cylinder is arranged above the slotted cylinder 801, and the guide The cylinder and the guide hole adopt clearance fit, which plays the role of limit, and ensures that the one-slot cylinder 801 will not shift. , the shaft hole B and the connecting shaft 803 adopt clearance fit, the slot is provided with a cam 802, the cam 802 and the connecting shaft 803 adopt clearance fit, and the connecting shaft 803 is nested on the outer wall of the slot. Shaft end retaining ring 10 which eliminates axial movement.

The circular cam 802 at the bottom of the cam-piston mechanism 8 is directly placed on the concave surface of the crank block 701 .

The working principle of the present invention is as follows: when the cam-piston type braille display is used, the electromagnetic mechanism 9 converts the alternating voltage into a magnetic force by relying on its own electromagnetic characteristics, attracting and providing power for the device under the cooperation of the L-shaped armature 702 , Here the electromagnetic mechanism 9 is a small electromagnetic coil wound independently, which can generate enough magnetic force to attract the L-shaped armature 702. The L-shaped armature 702 rotates to the side of the electromagnetic mechanism 9 about the positioning axis 5, thereby driving the crank block 701 to the electromagnetic mechanism. 9 When one side swings, the circular cam 802 is directly placed on the concave surface of the crank block 701, and the circular cam 802 is driven to swing with the crank block 701, and the contact chamber 3 itself has a limiting effect. A guide cylinder is provided, and the guide cylinder and the guide hole adopt clearance fit to play the role of limit, ensuring that the one-word groove cylinder 801 will not shift, and the contact 4 above the guide cylinder moves upward to form a certain height of Braille Bumps, each character point acts independently, and the character bumps at different positions are combined to form Braille characters, realizing a point display module that displays two points independently.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (4)

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 bolt (6), 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);

the support frame (2) is composed of a U-shaped plate and a sealing plate, two threaded holes A are formed in the upper two sides of the front end face of the U-shaped plate respectively, two counter bores B are formed in the two sides of the front end face of the sealing plate, a fastening bolt (6) penetrates through the counter bores B to be fixedly connected with the threaded holes A through threads, the threaded holes B are formed in the lower end faces of the U-shaped plate and the sealing plate, the fastening bolt (6) penetrates through the counter bores A to be fixedly connected with the threaded holes B through threads, the threaded holes C are formed in the upper end faces of the U-shaped plate and the sealing plate, shaft holes A are formed in the middle portions of the front end face and the rear end face of the U-shaped plate and the sealing plate respectively, the shaft holes A are in interference fit with the two ends of a positioning shaft (5), two counter bores 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 counter bores C to be fixedly connected with the threaded holes C through threads;

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), nested axle head 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) is opened there is counterbore D, connecting bolt (703) pass counterbore D and threaded hole D and pass through screw thread fixed connection, cam piston mechanism (8) are opened connecting axle (803) that have the spacing groove by both ends, cam (802), a word groove cylinder (801), axle head retaining ring (10) are constituteed, a word groove cylinder (801) top is provided with the guide cylinder, the guide cylinder adopts clearance fit with the guide hole, straight line groove cylinder (801) are provided with a straight line groove to open a straight line groove both sides has shaft hole B, shaft hole B adopts clearance fit with connecting axle (803), a straight line inslot is provided with cam (802), cam (802) adopt clearance fit with connecting axle (803), connecting axle (803) have axle head retaining ring (10) at a straight line groove outer wall nestification, circular cam (802) of cam piston mechanism (8) bottom are directly placed on crank piece (701) concave surface.

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 positioning shaft (5) is an optical shaft with symmetrically distributed annular grooves 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).

4. 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).

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