WO2022045472A1 - Cellule braille à moteurs linéaires piézoélectriques - Google Patents

Cellule braille à moteurs linéaires piézoélectriques Download PDF

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Publication number
WO2022045472A1
WO2022045472A1 PCT/KR2020/017661 KR2020017661W WO2022045472A1 WO 2022045472 A1 WO2022045472 A1 WO 2022045472A1 KR 2020017661 W KR2020017661 W KR 2020017661W WO 2022045472 A1 WO2022045472 A1 WO 2022045472A1
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WIPO (PCT)
Prior art keywords
piezoelectric
linear motor
piezoelectric linear
frame
braille cell
Prior art date
Application number
PCT/KR2020/017661
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English (en)
Korean (ko)
Inventor
전수아
Original Assignee
전수아
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Publication of WO2022045472A1 publication Critical patent/WO2022045472A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
    • H02N2/005—Mechanical details, e.g. housings
    • H02N2/0055—Supports for driving or driven bodies; Means for pressing driving body against driven body
    • H02N2/006—Elastic elements, e.g. springs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • H10N30/886—Additional mechanical prestressing means, e.g. springs

Definitions

  • the present invention relates to a piezoelectric linear motor-based braille cell, and more particularly, so that the visually impaired can acquire braille information using the fingertip sense, based on the piezoelectric linear motor, the pin protrudes above the aperture according to the electronic signal It is related to a linear motor-based braille cell that makes a braille shape.
  • Braille is made so that it can be read with the tactile sense of the fingertip by making convex dots on the ground.
  • braille such as 6 braille (3x2) or 8 braille (4x2) is commonly used, and the number and arrangement of braille are used. different to form a writing system.
  • a braille printer for outputting such braille is a device that makes a braille shape by making a small hole on the plate and protruding a small pin over the aperture according to an electronic signal, and is also called a braille cell.
  • a representative method includes a solenoid method, a piezoelectric method, and a polymer dielectric method.
  • the solenoid method is a method in which a magnetic field is generated according to an electrical signal input to the coil, and a plunger disposed in the coil moves by receiving a force to achieve a braille output.
  • the piezoelectric method is a method in which the length is changed according to an electrical signal applied to the piezoelectric material, and Braille is directly recognized by the changed length of the piezoelectric material.
  • the polymer dielectric is a method that uses the principle of compressing the polymer dielectric in the thickness direction and expanding it in the area direction by applying a voltage to both sides of a polymer material having a high dielectric constant, such as silicon or urethane, and then compressing the polymer dielectric in the thickness direction by mutual attraction.
  • a polymer material having a high dielectric constant such as silicon or urethane
  • Korean Patent Registration No. 10-0734731 discloses a compact and lightweight "braille output module and braille display device having the same" that is easy to configure in the form of multiple lines of braille using a piezoelectric actuator. .
  • the Braille output module through the tactile sense includes driving devices for realizing the tactile sense, and when implementing various products using this, there is a limitation in waterproofing, so there is a problem such as limiting in real life application. there was.
  • An object of the present invention is to solve the above problems, including a rectangular piezoelectric linear motor with high space efficiency compared to a circular shape, simplifying the internal structure of the braille cell, and packing between the braille cell internal structure seams or gaps It is to provide a piezoelectric linear motor-based braille cell having a sieve to provide a waterproof function.
  • the piezoelectric linear motor-based braille cell is a frame formed in a form in which a piezoelectric linear motor can be inserted, inserted into the frame, and from the center of the piezoelectric module and the piezoelectric module to the upper side.
  • a plurality of piezoelectric linear motors including a vertically formed moving shaft and provided inside the frame, a shaft hole is formed to correspond to the piezoelectric linear motor, and the moving shaft is inserted through the shaft hole to support the moving shaft Includes guide.
  • the frame includes a cover frame through which a plurality of cap holes are formed, a body frame coupled to a lower portion of the cover frame and into which the piezoelectric linear motor and the guide can be inserted, and a lower portion of the body frame coupled to the piezoelectric linear motor It characterized in that it comprises a circuit frame including a circuit board for transmitting and receiving electrical signals from the outside to control the.
  • the body frame is formed so that the piezoelectric linear motor can be inserted, an upper layer in which a first space portion accommodating a plurality of caps is formed, a guide layer in which a second space portion capable of accommodating the guide is formed, and a plurality of piezoelectric modules. It is characterized in that the receptive third space includes a lower layer formed in two rows.
  • the third space portion is characterized in that the space is formed so that each piezoelectric module can perform a linear motion according to an electrical signal.
  • the piezoelectric module includes a polygonal elastic body and a piezoelectric body on which an electrode is formed, wherein the piezoelectric body is attached to one or both surfaces of the elastic body.
  • the upper portion is formed of an elastic material in a round shape.
  • the moving shaft is characterized in that at least one O-ring is formed on a part of the moving shaft positioned inside the shaft hole.
  • the packing body is formed around the guide.
  • one end is connected to the upper peripheral surface of the shaft hole of the guide, and the other end further comprises a waterproof membrane connected along the outer circumferential surface of the movable shaft located at the height of the upper outer surface of the guide, wherein the waterproof membrane is the movable shaft for vertical movement It is characterized in that it contracts and expands accordingly.
  • the piezoelectric linear motor-based braille cell according to the present invention has a simple internal structure, and by providing a guide inside the frame, serves to support the moving shaft of the piezoelectric linear motor, and at the same time, between the shaft hole gap in which the moving shaft moves vertically By providing the packing body, there is an effect that can provide a waterproof function even when the braille cell is exposed to a moisture environment.
  • the piezoelectric linear motor is formed in a rectangular shape, it is superior in space efficiency compared to the circular shape and can obtain a relatively large displacement compared to the circular shape, so it is effective to solve the problem of the piezoelectric type method with small displacement compared to the power consumption.
  • FIG. 1 is a perspective view showing a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • FIG. 3 is a view for explaining the operation principle of a piezoelectric linear motor, which is a component of a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view illustrating an O-ring and a packing body of a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • FIG. 5 is an enlarged view showing a waterproof membrane of a piezoelectric linear motor-based braille cell according to another embodiment of the present invention.
  • FIG. 1 is a perspective view showing a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • a piezoelectric linear motor-based braille cell largely includes a frame 100 , a piezoelectric linear motor 200 , and a guide 300 .
  • the frame 100 is formed in a form in which the piezoelectric linear motor 200 can be inserted.
  • the frame 100 includes a cover frame 110 , a body frame 120 , and a circuit frame 130 .
  • a plurality of cap holes 111 are formed through the cover frame 110 .
  • the cap hole 111 is formed with six cap holes based on 6 braille (2x3), and may be formed by variously changing into other shapes including the 8 braille (2x4) shape.
  • the body frame 120 is coupled to the lower portion of the cover frame 110, and a piezoelectric linear motor groove 121 into which the piezoelectric linear motor 200 is inserted and a guide groove (not shown) into which the guide 300 is inserted are formed. do.
  • the linear motor grooves 121 are formed in two rows (2x2, 2x3, 2x4, etc.) in the number corresponding to the cap hole 111 .
  • the circuit frame 130 is coupled to the lower portion of the body frame 120 and includes a circuit board for transmitting and receiving electrical signals from the outside to control the piezoelectric linear motor 200 .
  • the piezoelectric linear motor 200 and the circuit board are interconnected by electric wires.
  • circuit frame 130 may be integrally formed with the body frame 120 . That is, the circuit frame 130 means a floor frame.
  • the piezoelectric linear motor 200 is inserted into the piezoelectric linear motor groove 121, and the piezoelectric module 210 and a moving shaft formed vertically from the center of the piezoelectric module 210 to the upper side (the cover frame side) ( 220).
  • the piezoelectric module 210 includes a polygonal elastic body 211 and a piezoelectric body 212 on which electrodes are formed.
  • the piezoelectric body 212 is formed by being attached to one or both surfaces of the elastic body 211 .
  • the elastic body 211 may be formed in various ways in a polygonal shape, but is preferably formed in a rectangular shape.
  • the piezoelectric body 212 may also be formed in a variety of polygonal shapes including quadrangular shapes.
  • the quadrangular structure has high spatial efficiency in terms of space compared to the circular structure, and has the effect of obtaining a relatively larger displacement than the circular structure.
  • the guide 300 is inserted into the guide groove of the body frame 120 , and a shaft hole (not shown) is formed to correspond to the cap hole 111 and the piezoelectric linear motor 200 . (220) is inserted through the shaft hole serves to support the moving shaft (220).
  • the shaft hole is formed so that the movable shaft 220 is slidably movable in the vertical direction along the inner circumferential surface of the shaft hole.
  • the piezoelectric linear motor-based braille cell is coupled to the upper portion of the moving shaft 220, the head 410 may further include a cap 400 having a round shape.
  • the cap 400 is a part that a person senses through touch and is made of an elastic material including rubber. This is effective in preventing the problem that the fingertip fatigues quickly due to a rough surface when a person continuously uses the braille cell by using the upper end of the moving shaft 220 with a fingertip.
  • the head 410 is made of a round type and an elastic material, there is an effect of increasing the sensory perception of the fingertips.
  • FIG. 2 is a cross-sectional view showing a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • the body frame 120 includes an upper layer in which the piezoelectric linear motor 200 can be inserted, and a first space portion 121a in which a plurality of caps are accommodated is formed. It may be divided into a guide layer in which a guide groove for accommodating a guide is formed, and a lower layer in which a third space portion 121c in which a plurality of piezoelectric modules 210 are accommodated is formed.
  • the third space portion 121c has a space so that each piezoelectric module 210 can perform a linear motion according to an electrical signal.
  • the piezoelectric linear motor 200 is prevented from protruding to the outside of the frame 100 .
  • FIG. 3 is a view for explaining the operation principle of a piezoelectric linear motor, which is a component of a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • the piezoelectric body 212 when a voltage is applied to the piezoelectric body 212 , the piezoelectric body 212 is deformed and the moving shaft 220 moves as shown in FIG. 2 . It rises along the second space portion 121b so that the head 410 protrudes to the outer surface of the frame 100 .
  • the elastic body 211 when the voltage applied to the piezoelectric body 212 is short-circuited, the elastic body 211 generates a force to restore it, and thereby the raised head 410 is accommodated into the first space portion 121a.
  • the piezoelectric linear motor-based braille cell according to the embodiment of the present invention in accordance with the above principle protrudes out of the head 410 and the cover frame 110 or is drawn in. , Braille information can be output.
  • FIG. 4 is a cross-sectional view illustrating an O-ring and a packing body of a piezoelectric linear motor-based braille cell according to an embodiment of the present invention.
  • At least one O-ring 230 may be formed on an outer circumferential surface of the movable shaft 220 positioned inside the shaft hole 310 .
  • At least one O-ring groove (not shown) may be formed on the outer circumferential surface to form the O-ring 230 .
  • the O-ring 230 is formed to be fixed on the shaft hole 310 rather than the outer circumferential surface.
  • the guide 300 may have a packing body 320 formed around it.
  • the O-ring 230 and the packing body 320 may be made of various materials including synthetic rubber, leather, and hemp, and preferably made of a synthetic rubber material.
  • the O-ring 230 and the packing body 320 move between a seam or a gap (eg, a shaft hole) that may occur in a coupling relationship between components of a piezoelectric linear motor-based braille cell according to an embodiment of the present invention. Entry can be prevented. That is, even if a liquid such as water is introduced through the cap hole 111 , there is an effect of preventing water from leaking into the piezoelectric module 210 or the circuit board located under the frame 100 .
  • FIG. 5 is an enlarged view showing a waterproof membrane of a piezoelectric linear motor-based braille cell according to another embodiment of the present invention.
  • the piezoelectric linear motor-based braille cell has one end connected to the outer surface around the upper shaft hole of the guide 300, and the other end is
  • the guide 300 may further include a waterproofing membrane 123 connected along the outer circumferential surface of the movable shaft 220 positioned at a height of the upper outer surface.
  • the waterproof membrane 123 has a shape like a truncated cone with only a side surface on the shaft hole, and is provided to be contractible and expandable according to the vertical movement of the movable shaft 220 .
  • the waterproof membrane 123 is made of cloth or a waterproof material so that it expands when the moving shaft 220 rises and contracts when it descends, and may be made of various flexible materials.
  • the piezoelectric module 210 or the circuit board located on the lower side of the frame 100 can be waterproofed from water (liquid) flowing through the shaft hole. .

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  • Engineering & Computer Science (AREA)
  • 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)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

Une cellule braille à moteurs linéaires piézoélectriques selon la présente invention comprend : un cadre formé pour avoir une forme dans laquelle des moteurs linéaires piézoélectriques peuvent être insérés ; une pluralité de moteurs linéaires piézoélectriques qui sont chacun insérés dans le cadre et comprennent chacun un module piézoélectrique et un arbre mobile qui est formé verticalement vers le haut à partir du centre du module piézoélectrique ; et un guide disposé à l'intérieur du cadre et ayant des trous d'arbre correspondant aux moteurs linéaires piézoélectriques, l'arbre mobile de chacun des moteurs linéaires piézoélectriques passant à travers chacun des trous d'arbre, et étant inséré dans ceux-ci, pour être supporté par le guide.
PCT/KR2020/017661 2020-08-26 2020-12-04 Cellule braille à moteurs linéaires piézoélectriques WO2022045472A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200107651A KR102481510B1 (ko) 2020-08-26 2020-08-26 압전 리니어 모터 기반 점자셀
KR10-2020-0107651 2020-08-26

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WO2022045472A1 true WO2022045472A1 (fr) 2022-03-03

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PCT/KR2020/017661 WO2022045472A1 (fr) 2020-08-26 2020-12-04 Cellule braille à moteurs linéaires piézoélectriques

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0812536B2 (ja) * 1993-04-16 1996-02-07 ケージーエス株式会社 点字セルモジュール
JPH0883043A (ja) * 1994-09-13 1996-03-26 Tokihide Tsuchiya 点字触知ピン作動装置と点字触知ピン作動方法と点字触 知ピン作動部分変換装置と点字触知ピン作動部分変換方 法
KR100734731B1 (ko) * 2006-09-30 2007-07-03 고려대학교 산학협력단 점자 출력 모듈 및 이를 구비하는 점자 디스플레이 장치
KR100768888B1 (ko) * 2006-06-12 2007-10-19 (주)피에조테크놀리지 소형 초음파 리니어 액추에이터 구동제어장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0812536B2 (ja) * 1993-04-16 1996-02-07 ケージーエス株式会社 点字セルモジュール
JPH0883043A (ja) * 1994-09-13 1996-03-26 Tokihide Tsuchiya 点字触知ピン作動装置と点字触知ピン作動方法と点字触 知ピン作動部分変換装置と点字触知ピン作動部分変換方 法
KR100768888B1 (ko) * 2006-06-12 2007-10-19 (주)피에조테크놀리지 소형 초음파 리니어 액추에이터 구동제어장치
KR100734731B1 (ko) * 2006-09-30 2007-07-03 고려대학교 산학협력단 점자 출력 모듈 및 이를 구비하는 점자 디스플레이 장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHO HYUN-CHEOL, SEOK-HAENG HUH, JAE-BOK SONG: "Development of a Small-sized Braille Cell for the Blind", THE JOURNAL OF KOREA ROBOTICS SOCIETY, vol. 2, no. 2, 30 June 2007 (2007-06-30), pages 137 - 142, XP055903417 *

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KR20220026751A (ko) 2022-03-07
KR102481510B1 (ko) 2022-12-23

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