CN109646259A - A kind of intelligence zoom view light training equipment - Google Patents
A kind of intelligence zoom view light training equipment Download PDFInfo
- Publication number
- CN109646259A CN109646259A CN201910101594.8A CN201910101594A CN109646259A CN 109646259 A CN109646259 A CN 109646259A CN 201910101594 A CN201910101594 A CN 201910101594A CN 109646259 A CN109646259 A CN 109646259A
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- pedestal
- eyeglass
- electric machine
- accommodating cavity
- rotating electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 230000007704 transition Effects 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 3
- 210000001508 eye Anatomy 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000004382 visual function Effects 0.000 description 7
- 230000004438 eyesight Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 210000005252 bulbus oculi Anatomy 0.000 description 2
- 208000013521 Visual disease Diseases 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004424 eye movement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H5/00—Exercisers for the eyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2205/00—Devices for specific parts of the body
- A61H2205/02—Head
- A61H2205/022—Face
- A61H2205/024—Eyes
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Rehabilitation Tools (AREA)
Abstract
The invention discloses a kind of intelligent zoom view light training equipment, belong to view light training apparatus field, including microprocessor, function button, rotating electric machine, pedestal, the rotating electric machine, function button are connect with microprocessor, the rotating shaft terminal of the rotating electric machine is provided with disk, the provided circumferentially about of the disk has convex block, and the convex block is connect by connecting rod with pedestal;View light device is provided on the pedestal, described depending on light device includes left eye equipment and right eye equipment, and left eye equipment and right eye equipment include support plate and accommodating cavity, are provided with stroke groove on the pedestal, stroke block, the stroke block and stroke groove transition fit are provided in the support plate;The accommodating cavity is located in support plate, and inspection section is provided on accommodating cavity, striking gear and eyeglass conversion equipment are provided in the accommodating cavity;The conversion to different power lens can be completed without relying upon manual operation in the present invention, facilitates intelligence, easy to operate.
Description
Technical field
The invention belongs to regard light training apparatus field, it is related to a kind of intelligent zoom view light training equipment.
Background technique
With becoming increasingly popular for the smart machines such as mobile phone, computer, television set and household electrical appliance, people are mechanical, electrical using hand
When the smart machines such as brain or television set and household electrical appliance, due to eyeball meeting long-time direct vision screens, the inside and outside muscle of eyeball is enabled to produce
Raw over fatigue, so as to cause the generation of the visual disorders such as visual fatigue, binocular visual function decline, eye movement hypofunction.
People have developed visual function training tool as a result, current visual function training tool in clinical and teaching use compared with
It is extensive.
The lens movement structure that existing visual function training uses, mostly manually, intelligence degree is lower;And the degree of eyeglass
Number conversion is completed by the increase and decrease of multiple eyeglasses, and total lens thickness is larger, increases the transparent length of eyeglass, is unfavorable for patient's vision
Recovery.
Summary of the invention
It is an object of the invention to: a kind of intelligent zoom view light training equipment is provided, solves existing visual function instruction
The problem of lens movement structure that white silk uses, multiple total lens thickness are larger, are unfavorable for the recovery of patient's vision.
The technical solution adopted by the invention is as follows:
A kind of intelligence zoom view light training equipment, including microprocessor, function button rotating electric machine, pedestal, the rotation
Motor, function button are connect with microprocessor, and the rotating shaft terminal of the rotating electric machine is provided with disk, the disk
It is provided circumferentially about to have the first convex block, connecting rod is connected on first convex block, the two sides of the pedestal are provided with the second convex block, institute
The one end for stating connecting rod is connect with the first convex block, and the other end of the connecting rod and the second convex block are rotatablely connected;It is arranged on the pedestal
There is a view light device, described depending on light device includes left eye equipment and right eye equipment, and left eye equipment and right eye equipment include support plate
And accommodating cavity, stroke groove is provided on the pedestal, and stroke block, the stroke block and stroke groove mistake are provided in the support plate
Cross cooperation;The accommodating cavity is located in support plate, and inspection section is provided on accommodating cavity, is provided with striking gear in the accommodating cavity
With eyeglass conversion equipment, the striking gear includes the miniature rotating electric machine connecting with microprocessor, the miniature rotating electric machine
Main shaft it is vertical with the bottom of accommodating cavity, be connected with plectrum on the main shaft of the miniature rotating electric machine;The eyeglass conversion equipment
Including rotary shaft and eyeglass mounting table, the rotary shaft is fixed on the bottom of accommodating cavity, and the eyeglass mounting table is cylinder, mirror
Piece mounting table and rotary shaft are rotatablely connected, and are evenly arranged with several eyeglass pedestals, eyeglass on the circumference of the eyeglass mounting table
Optical mirror slip is provided on pedestal, the light transmission of optical mirror slip is oriented parallel to horizontal plane, the optics being arranged on each eyeglass pedestal
The degree of eyeglass is different;Eyeglass pedestal arranges the circumference to be formed and intersects with the rotating path of plectrum.
The lens movement structure that existing visual function training uses, mostly manually, intelligence degree is lower;And the degree of eyeglass
Number conversion is completed by the increase and decrease of multiple eyeglasses, and total lens thickness is larger, increases the transparent length of eyeglass, is unfavorable for patient's vision
Recovery.A kind of intelligent zoom view light training equipment of the present invention, issues operation signal, micro- place to microprocessor by function button
It manages device and issues the intelligent zoom view light training each component movement of equipment of control signal control.Rotating electric machine receives what microprocessor issued
Signal is controlled, rotating electric machine rotation drives disc rotary, and the first convex block on disk follows disc rotary;First convex block is connected with
Connecting rod, connecting rod push pedestal to complete straight reciprocating motion, realize in the rectilinear direction using the rotation connection with the second convex block
Position base adjustment;Using the stroke block in support plate can in the stroke groove of pedestal parallel sliding, according to the left eye of user
Right eye position is adjusted accommodating cavity, and the eyes of user are completed to match with the position of inspection section;Miniature rotating electric machine receives
The control signal that microprocessor issues, miniature rotating electric machine rotation drive plectrum rotation, and plectrum stirs eyeglass pedestal when rotating, complete
At the rotation of eyeglass mounting table, eyeglass pedestal arranges the circumference to be formed and intersects with the rotating path of plectrum, and eyeglass pedestal arranges shape
At circumference on the circular arc arc length that the rotating path of plectrum is crossed to form be circular arc arc length where two neighboring eyeglass pedestal
Twice, plectrum rotates a circle, and eyeglass pedestal rotates on the position of next adjacent mirror pedestal to direction of rotation, realizes
The conversion of the optical mirror slip of different degrees;Using inspection section position as benchmark position, the optical mirror slip of user will be suitable for
It is adjusted to be located at the reference position.
Further, be provided with locating piece on the pedestal, the two sides of the pedestal are provided with guide rail, the locating piece with
Guide clearance cooperation.Being provided with locating piece can cooperate with guide rail, guarantee to keep horizontal stable when base motions.
Further, the eyeglass pedestal is arranged with the miniature electromotive handspike connecting with microprocessor.Miniature electric pushes away
The direction of motion of bar is perpendicular to horizontal plane.When eyeglass is located at benchmark position, operation signal, microprocessor are issued using function button
Analysis processing signal simultaneously issues control signal, and control miniature electromotive handspike pushes eyeglass pedestal to rise certain distance, avoids being located at
Eyeglass superposition on same straight line, influences the observation of user.
Further, detent slot, detent slot and detent piece clearance fit, detent piece and light are provided on the eyeglass pedestal
Learn eyeglass connection.It is cooperatively connected using detent piece and detent slot, so that optical mirror slip is detachable structure, facilitates installation and dimension
Shield can direct dismounting and change if encountering eyeglass scratch or damage.
Further, the thickness of the optical mirror slip is from top to bottom sequentially reduced.Optical mirror slip upper thickness is thicker can be square
Just the object of distant place is observed, optical mirror slip lower part thinner thickness can facilitate the object of observation nearby, so that user is from as far as close
There can be a clearly visual field.
Further, the touch display screen connecting with microprocessor is provided on the pedestal.Touch display screen can be real
When show the state of intelligent zoom view light training equipment, operator is clear by touching the control completed to lens movement structure
Intuitively, convenient and efficient.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. a kind of intelligent zoom view light training equipment of the present invention, can be completed without relying upon manual operation to different degree mirrors
The conversion of piece facilitates intelligence, easy to operate.
2. a kind of intelligent zoom view light training equipment of the present invention, need to only use an eyeglass, not have to more when user observes
A eyeglass, transparent length shorten, and are conducive to the recovery of patient's vision.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings, in which:
Fig. 1 is a kind of overall structure diagram of intelligent zoom view light training equipment of the invention;
Fig. 2 is striking gear and the signal of eyeglass conversion device structure of a kind of intelligent zoom view light training equipment of the present invention
Figure;
Marked in the figure: 1- rotating electric machine, 101- disk, the first convex block of 102-, 103- connecting rod, 2- pedestal, 201- second are convex
Block, 202- stroke groove, 203- guide rail, 3- view light device, 301- support plate, 302- accommodating cavity, 303- stroke block, 304- observation
Cylinder, the miniature rotating electric machine of 4-, 5- plectrum, 6- rotary shaft, 7- eyeglass mounting table, 701- eyeglass pedestal, 702- optical mirror slip, 703-
Detent piece.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
Feature and performance of the invention are described in further detail below with reference to embodiment.
Embodiment one
A kind of intelligent zoom view light training equipment that present pre-ferred embodiments provide, including microprocessor, function button,
Rotating electric machine 1, pedestal 2, the rotating electric machine 1, function button are connect with microprocessor, the rotary shaft of the rotating electric machine 1
Both ends are provided with disk 101, and the provided circumferentially about of the disk 101 has the first convex block 102, connect on first convex block 102
It is connected to connecting rod 103, the two sides of the pedestal 2 are provided with the second convex block 201, and one end of the connecting rod 103 and the first convex block 102 connect
It connects, the other end of the connecting rod 103 and the second convex block 201 are rotatablely connected;View light device 3, the view are provided on the pedestal 2
Light device 3 includes left eye equipment and right eye equipment, and left eye equipment and right eye equipment include support plate 301 and accommodating cavity 302, institute
It states and is provided with stroke groove 202 on pedestal 2, stroke block 303, the stroke block 303 and stroke groove are provided in the support plate 301
202 transition fits;The accommodating cavity 302 is located in support plate 301, and inspection section 304, the accommodating are provided on accommodating cavity 302
Striking gear and eyeglass conversion equipment are provided in chamber 302, the striking gear includes the miniature rotation connecting with microprocessor
The main shaft of motor 4, the miniature rotating electric machine is vertical with the bottom of accommodating cavity 302, connects on the main shaft of the miniature rotating electric machine
It is connected to plectrum 5;The eyeglass conversion equipment includes rotary shaft 6 and eyeglass mounting table 7, and the rotary shaft 6 is fixed on accommodating cavity 302
Bottom, the eyeglass mounting table 7 is cylinder, and eyeglass mounting table 7 and rotary shaft 6 are rotatablely connected, the eyeglass mounting table 7
It is evenly arranged with several eyeglass pedestals 701 on circumference, optical mirror slip 702, optical mirror slip 702 are provided on eyeglass pedestal 701
Light transmission be oriented parallel to horizontal plane, the degree for the optical mirror slip 702 being arranged on each eyeglass pedestal 701 is different;Eyeglass pedestal
The circumference that 701 arrangements are formed intersects with the rotating path of plectrum 5.
Microprocessor adopts PLC controller, model MITSUBI FX2N-48MR-UA1/UL, and the RAM of built-in 8K capacity is deposited
Reservoir can extend to 16K, and rotating electric machine uses RS545 double output shaft DC speed-reducing, and miniature rotating electric machine 4 uses
50GB3217 minisize dc toothed gearing electric motor, optical mirror slip use resin lens.
The lens movement structure that existing visual function training uses, mostly manually, intelligence degree is lower;And the degree of eyeglass
Number conversion is completed by the increase and decrease of multiple eyeglasses, and total lens thickness is larger, increases the transparent length of eyeglass, is unfavorable for patient's vision
Recovery.A kind of intelligent zoom view light training equipment of the present invention, microprocessor issue control signal and control intelligent zoom view light instruction
Practice each component movement of equipment.Rotating electric machine 1 receives the control signal that microprocessor issues, and the rotation of rotating electric machine 1 drives disk 101
It rotates, the first convex block 102 on disk 101 follows disk 101 to rotate;First convex block 102 is connected with connecting rod 103,103 benefit of connecting rod
With the rotation connection with the second convex block 201, pushes pedestal 2 to complete straight reciprocating motion, realize pedestal 2 in the rectilinear direction
The adjustment set;Using the stroke block 303 in support plate 301 can in the stroke groove 202 of pedestal parallel sliding, according to user's
Left eye right eye position is adjusted accommodating cavity 302, and the eyes of user are completed to match with the position of inspection section 304;Miniature
Rotating motor 4 receives the control signal that microprocessor issues, and the miniature rotation of rotating electric machine 4 drives plectrum 5 to rotate, when plectrum 5 rotates
Eyeglass pedestal 701 is stirred, the rotation of eyeglass mounting table 7, the rotation of circumference and plectrum 5 that the arrangement of eyeglass pedestal 701 is formed are completed
Path intersection, it is adjacent that eyeglass pedestal 701, which arranges the circular arc arc length being crossed to form on the circumference formed with the rotating path of plectrum 5,
Twice of two 701 place circular arc arc length of eyeglass pedestal, plectrum 5 rotates a circle, in the rotation to direction of rotation of eyeglass pedestal 701
On the position of next adjacent mirror pedestal 701, the conversion of the optical mirror slip 702 of different degrees is realized;With 304 institute of inspection section
It is set to base position in place, the optical mirror slip 702 for being suitable for user is adjusted to be located at the reference position.
Embodiment two
The present embodiment on the basis of example 1, is provided with locating piece on the pedestal 2, the two sides of the pedestal 2 are set
It is equipped with guide rail 203, the locating piece and 203 clearance fit of guide rail.Being provided with locating piece can cooperate with guide rail, guarantee pedestal fortune
It is kept when dynamic horizontal.
Embodiment three
Further, the eyeglass pedestal 701 is arranged with the miniature electromotive handspike connecting with microprocessor.
Miniature electromotive handspike uses NKLA direct current deceleration miniature electric telescopic putter, stroke 50mm.
The direction of motion of miniature electromotive handspike is perpendicular to horizontal plane.When optical mirror slip 702 is located at benchmark position, function is utilized
Key issues operation signal, and microprocessor analysis processing signal simultaneously issues control signal, and control miniature electromotive handspike pushes eyeglass
Pedestal 701 rises certain distance, avoids the optical mirror slip 702 being located along the same line from being superimposed, influences the observation of user.
The foregoing is merely illustrative of the preferred embodiments of the present invention, the protection scope being not intended to limit the invention, any
Those skilled in the art within the spirit and principles in the present invention made by any modifications, equivalent replacements, and improvements etc.,
It should all be included in the protection scope of the present invention.
Claims (6)
1. it is a kind of intelligence zoom view light training equipment, it is characterised in that: including microprocessor, function button, rotating electric machine (1),
Pedestal (2), the rotating electric machine (1), function button are connect with microprocessor, the rotating shaft terminal of the rotating electric machine (1)
It is provided with disk (101), the provided circumferentially about of the disk (101) has the first convex block (102), first convex block (102)
On be connected with connecting rod (103), the two sides of the pedestal (2) are provided with the second convex block (201), one end of the connecting rod (103) with
First convex block (102) connection, the other end and the second convex block (201) rotation connection of the connecting rod (103);On the pedestal (2)
It is provided with view light device (3), described depending on light device (3) includes left eye equipment and right eye equipment, and left eye equipment and right eye equipment are equal
It including support plate (301) and accommodating cavity (302), is provided with stroke groove (202) on the pedestal (2), on the support plate (301)
It is provided with stroke block (303), the stroke block (303) and stroke groove (202) transition fit;The accommodating cavity (302) is located at branch
On fagging (301), be provided on accommodating cavity (302) inspection section (304), be provided in the accommodating cavity (302) striking gear and
Eyeglass conversion equipment, the striking gear include the miniature rotating electric machine (4) connecting with microprocessor, the miniature rotating electric machine
Main shaft it is vertical with the bottom of accommodating cavity (302), plectrum (5) are connected on the main shaft of the miniature rotating electric machine;The eyeglass
Conversion equipment includes rotary shaft (6) and eyeglass mounting table (7), and the rotary shaft (6) is fixed on the bottom of accommodating cavity (302), institute
Eyeglass mounting table (7) are stated as cylinder, eyeglass mounting table (7) and rotary shaft (6) are rotatablely connected, the eyeglass mounting table (7)
It is evenly arranged with several eyeglass pedestals (701) on circumference, is provided with optical mirror slip (702), optical frames on eyeglass pedestal (701)
The light transmission of piece (702) is oriented parallel to horizontal plane, and the degree for the optical mirror slip (702) being arranged on each eyeglass pedestal (701) is not
Together;The circumference that eyeglass pedestal (701) arrangement is formed intersects with the rotating path of plectrum (5).
2. a kind of intelligent zoom view light training equipment according to claim 1, it is characterised in that: set on the pedestal (2)
It is equipped with locating piece, the two sides of the pedestal (2) are provided with guide rail (203), the locating piece and guide rail (203) clearance fit.
3. a kind of intelligent zoom view light training equipment according to claim 1, it is characterised in that: the eyeglass pedestal
(701) it is arranged with the miniature electromotive handspike connecting with microprocessor.
4. a kind of intelligent zoom view light training equipment according to claim 1, it is characterised in that: the eyeglass pedestal
(701) detent slot, detent slot and detent piece (703) clearance fit are provided on, detent piece (703) is connect with optical mirror slip.
5. a kind of intelligent zoom view light training equipment according to claim 1, it is characterised in that: the optical mirror slip
(702) thickness is from top to bottom sequentially reduced.
6. a kind of intelligent zoom view light training equipment according to claim 1, it is characterised in that: set on the pedestal (2)
It is equipped with touch display screen.
Priority Applications (1)
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CN201910101594.8A CN109646259B (en) | 2019-02-01 | 2019-02-01 | Intelligent zooming vision training equipment |
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CN201910101594.8A CN109646259B (en) | 2019-02-01 | 2019-02-01 | Intelligent zooming vision training equipment |
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CN109646259A true CN109646259A (en) | 2019-04-19 |
CN109646259B CN109646259B (en) | 2023-12-15 |
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JP2018047102A (en) * | 2016-09-23 | 2018-03-29 | Iic株式会社 | Focus change training device |
CN108542726A (en) * | 2018-05-25 | 2018-09-18 | 刘博韬 | A kind of korector and the object wearing device for being equipped with the korector |
CN109276422A (en) * | 2018-11-27 | 2019-01-29 | 孙汉军 | The near-sighted prevention and control instrument of regulatory function training |
CN210020223U (en) * | 2019-02-01 | 2020-02-07 | 河南云睛视光科技有限公司 | Intelligent zooming visual training equipment |
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KR101580477B1 (en) * | 2014-08-12 | 2015-12-28 | 박성용 | Device for exercising muscles in eyes |
CN204208005U (en) * | 2014-10-23 | 2015-03-18 | 中山市爱明天使视光科技有限公司 | Wheel disc number of degrees conversion equipment and adopt the strong eye equipment of this structure |
CN104958169A (en) * | 2015-04-30 | 2015-10-07 | 付祖家 | Functional leaf disk, comprehensive vision training apparatus and training method |
CN205515465U (en) * | 2016-02-03 | 2016-08-31 | 胡品娟 | Vision training appearance that can move lens certainly |
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