CN210323566U - Reading and writing telescope - Google Patents
Reading and writing telescope Download PDFInfo
- Publication number
- CN210323566U CN210323566U CN201920919262.6U CN201920919262U CN210323566U CN 210323566 U CN210323566 U CN 210323566U CN 201920919262 U CN201920919262 U CN 201920919262U CN 210323566 U CN210323566 U CN 210323566U
- Authority
- CN
- China
- Prior art keywords
- telescope
- lens
- eye
- write
- read
- 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.)
- Active
Links
Images
Landscapes
- Telescopes (AREA)
Abstract
The utility model provides a reading and writing televiewer belongs to the optical instrument technical field who is used for prevention myopia and eyesight health care. Mainly comprises a telescope cover and a supporting frame for supporting the telescope cover; the telescope cover comprises an eye sight hole, and a telescope reflector is arranged on the periphery of the eye sight hole; the peripheral of the eyes can see or unconsciously sense the light reflected from the far periphery through the telescope while the reader reads and writes. The utility model discloses can make the user read and write the reading and writing when the anytime and anywhere can see far, look far away, like the open air, can be conscious not the impression of feeling far away, break away from near impression at any time, read and write the field of vision not restricted moreover, its convenient to use, simple structure, treatment and prevention myopia effect preferred.
Description
Technical Field
The utility model belongs to the technical field of optical instruments for preventing myopia and protecting eyesight, and is particularly suitable for reading and writing.
Background
The myopia is caused by long-time use of eyes of people in a near environment, students usually face a wall when sitting in front of a desk at home to study and read, and always see and look near in the front direction, the left direction and the right direction, so that the students feel unconscious and feel near without getting rid of the near feeling for a moment. Although the existing instruments for preventing and treating myopia are more, the effect and the application of the instruments are still greatly limited, some instruments are also complicated in structure, and the instruments are troublesome to manufacture and use. Causing a lot of inconvenience to the user.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reading and writing televiewer can make the user read and write the peripheral field of vision of word and can see far, look far at anytime and anywhere, like the open air, can be conscious the impression of unconscious far, break away from near impression at any time, and the reading and writing field of vision is not limited moreover, its convenient to use, simple structure, treatment and prevention myopia effect preferred.
In order to achieve the above object, the utility model adopts the following technical scheme: reading and writing telemicroscope, its characterized in that: comprises a telescope cover and a supporting frame for supporting the telescope cover; the telescope cover comprises an eye sight hole, and a telescope reflector is arranged on the periphery of the eye sight hole; the peripheral of the eyes can see or unconsciously sense the light reflected from the far periphery through the telescope while the reader reads and writes.
Furthermore, four radial lines are formed from the geometric center of the eye hole or from the peripheral connecting line of the eye hole outwards, the periphery of the eye hole is divided into 4 parts of the upper part, the left part, the right part and the lower part, the peripheries of the eye hole except the lower part are provided with the telescopic reflectors, and the area of the telescopic reflectors can cover the peripheral vision of the eye except the lower part by more than 50 percent and can be basically covered or fully covered.
The term "substantial coverage" means a coverage of 70% or more.
Further, the shape of the whole telescopic reflector arranged on the periphery of the telescope cover, i.e. the periphery of the eye except the lower part is divided into a convex surface type, a concave surface type or a plane type.
Furthermore, the convex surface type comprises partial outer side surfaces of the frustum pyramid or comprises partial convex curved surfaces; the concave surface type comprises part of the inner side surface of the frustum pyramid or comprises part of the concave curved surface; the prismatic table is a non-regular 4 prismatic table or a non-regular polygonal table. The multi-edge platform (including 3-edge platform and multi-edge platform).
Furthermore, the area of the non-regular 4-edge frustum is the smallest below, the area of the non-regular 4-edge frustum is the largest above, and the area of the non-regular 4-edge frustum is the smallest below.
Further, the telescope mirror includes a glass mirror, a metal mirror, or a plastic coated mirror. Furthermore, the height of the eye hole is 20 mm-180 mm, and the width is 50 mm-250 mm.
Furthermore, the support frame 1 also comprises a telescopic cover lifting adjusting mechanism and/or a telescopic cover angle adjusting mechanism which can be adjusted to a proper reading and writing position of a reader; furthermore, a reading and writing platen for placing books is arranged opposite to the sight hole; furthermore, the book placing reading and writing bedplate comprises an inclined book placing reading and writing bedplate; further, a lower jaw supporting plate is arranged below the eye sight hole; furthermore, the lower jaw supporting plate is an up-down lifting type or eccentric lifting type lower jaw supporting plate.
Further, a lens is arranged at the position of and/or behind the eye hole, and the lens comprises a convex lens, a concave lens, a Fresnel lens, a flat lens, a bifocal lens, a multifocal lens, an aspheric lens, a cylindrical lens, a prism, a blue light prevention lens, or a combination of two or more of the above.
Furthermore, the power of the convex lens is 0.25D to 2.50D.
Furthermore, the power of the convex lens is 0.50D to 1.50D.
Furthermore, a lens or a lens group is arranged at the position of the eye hole and/or behind the eye hole, the power of the lens or the lens group can correct the ametropia of the eye, and the lens or the lens group also has the functions of enlarging and zooming the image of the convex lens or the functions of reducing and enlarging the visual field of the image of the concave lens, and the function of increasing the depth of field. Correcting refractive error of the eye means correcting myopia, hyperopia, astigmatism, strabismus, and the like.
The utility model discloses because can make the peripheral field of vision look far away at any time or experience distance light when reading and writing, treatment and prevention myopia effect preferred makes things convenient for the reading and writing simultaneously.
The utility model provides a reading and writing teletelescope's beneficial effect lies in: compared with the prior art, the utility model discloses can make the user read and write the peripheral field of vision of eye can see far, look far away at no time when reading and writing, like outdoor the same, or unconsciously feel from peripheral light of reflection far away, can feel unconsciously feel far away, get rid of near impression at any time, read and write the field of vision not restricted moreover, its convenient to use, simple structure, treatment and prevention myopia effect are good.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following embodiments and the accompanying drawings are briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 4 is a view in the direction a of the convex or concave terrace structure of fig. 1.
FIG. 5 is a view from direction B of the convex curved surface structure or the concave curved surface structure shown in FIG. 3.
Fig. 6 is a schematic structural view of embodiment 3 of the present invention.
The meanings of each mark in the figure are as follows: 1-support frame, 2-lifting mechanism, 3-eye hole, 4-convex telescope cover, 5-book reading and writing table board, 6-convex or concave frustum telescope cover, 6-1-upper plate, 6-2-left side plate, 6-3-right side plate, 6-4-lower plate (convex lens, black curtain or connecting plate), 7-convex or concave frustum telescope cover, 7-1-lower side plate (convex lens, black curtain or connecting plate), 8-concave telescope cover, 9-flat telescope cover, 10-lower jaw supporting plate, seat and lifting adjusting structure, 11-convex lens or lens group, 12-convex lens or lens group seat body, 13-convex lens or lens group seat body screw gland, 14-connecting rod, 15-long strip hole, 16-computer or television position schematic.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will now be described with reference to fig. 1-6.
As a specific embodiment of the present invention, the reading/writing telescope is characterized in that: comprises a telescope cover and a supporting frame 1 for supporting the telescope cover; the telescope cover comprises an eye sight hole 3, and a telescope reflector is arranged on the periphery of the eye sight hole 3; the peripheral field of vision of the eyes of the reader can see or unconsciously sense the light reflected from the periphery far away through the telescope while the reader reads and writes.
The number of the sight holes is one or 2. Matching with eye reading and writing.
The utility model discloses can make the user read and write the word and can see far, look far at anytime and anywhere, like the open air, can be conscious the impression of unconscious feeling far away, break away from near impression at any time, read and write the field of vision not restricted moreover, its convenient to use, simple structure, treatment and prevention myopia effect are good.
As a specific embodiment of the present invention, further, four radiation lines are formed from the geometric center of the eye or from the peripheral line of the eye, the periphery of the eye is divided into 4 parts, i.e., upper, left, right and lower, and the periphery of the eye except the lower is provided with the telescopic mirror, the area of the telescopic mirror can cover the peripheral visual field of the eye except the lower by more than 50%, basically or fully.
The term "substantial coverage" means a coverage of 70% or more.
As a specific embodiment of the present invention, the shape of the entire telescope reflector provided on the periphery of the telescope cover, i.e., the eye 3, except the lower side thereof is classified into a convex type, a concave type, or a flat type.
As a specific embodiment of the present invention, the convex surface type includes a part of the outer side surface of the prism table (as shown in fig. 4), or includes a part of the convex curved surface (as shown in fig. 5); the concave surface comprises part of the inner side surface of the frustum pyramid (as shown in figure 4) or comprises part of a concave curved surface (as shown in figure 5); the prismatic table is a non-regular 4 prismatic table or a non-regular polygonal table. The multi-edge platform (including 3-edge platform and multi-edge platform).
As a specific embodiment of the present invention, further, as shown in fig. 4, the non-regular 4-sided prism has the smallest area below, the second area from left to right, and the largest area above.
As an embodiment of the present invention, further, the telescope comprises a glass reflector, as an embodiment of the present invention, a metal reflector or a plastic coating reflector.
As a specific embodiment of the utility model, furthermore, the eye hole is 20mm ~ 180mm high, 50mm ~ 250mm wide.
As a specific embodiment of the present invention, further, the support frame 1 further includes a telescopic cover lifting adjusting mechanism and/or a telescopic cover angle adjusting mechanism, and can adjust the suitable reading and writing position of the reader/writer. As shown in the figure, the lifting adjusting mechanism is of an inner sleeve type and an outer sleeve type and is connected by fastening screws; as shown in the figure, the telescope cover angle adjustment mechanism is that one end of the upper end of the support frame 1 and a telescope cover hinge connecting rod 14 is hinged with the telescope cover, and the hole at the other end is fixed by adjusting the angle with a fastening bolt and a long hole 15 on the support frame 1. Or in other adjustable manners.
As a specific embodiment of the present invention, further, a reading/writing desk board for placing books is provided opposite to the eye hole.
As a specific embodiment of the present invention, further, the book placing, reading and writing platen includes an inclined book placing, reading and writing platen.
As a specific embodiment of the present invention, further, a lower jaw supporting plate is disposed below the eye sight hole; furthermore, the lower jaw supporting plate is an up-down lifting type or eccentric lifting type lower jaw supporting plate. As shown in the drawing, the eccentric lifting type lower jaw supporting plate comprises a lower jaw supporting plate, a seat and a lifting adjusting structure, and comprises a screw rod, wherein the upper end of the screw rod is in threaded connection with an eccentric screw hole of the seat, and the lower end of the screw rod is fixed with a long hole 15 on the supporting frame 1 through a fastening bolt. Or in other adjustable manners.
As a specific embodiment of the present invention, further, a lens is disposed at the position of and/or behind the eye hole, and the lens includes a convex lens, a concave lens, a fresnel lens, a flat lens, a bifocal lens and a multifocal lens; and an aspherical lens, a cylindrical lens, a prism, a blue light-proof lens, or a combination of two or more thereof.
As a specific embodiment of the present invention, further, the value of the convex lens power is 0.25D to 2.50D. When reading and writing, it has the functions of magnifying and changing far, and is very comfortable for eyes, and is not easy to fatigue.
As a specific embodiment of the present invention, preferably, the power value of the convex lens is 0.50D to 1.50D.
As a specific embodiment of the present invention, the concave lens has an image reducing function and a visual field expanding function, and can be used for watching large televisions and the like, which are sometimes very desirable.
As a specific embodiment of the present invention, further, the eye hole and/or the back is provided with a lens or a lens group, and the power of the eye lens is not only capable of correcting ametropia of the eye, but also has the functions of enlarging and zooming out the image of the convex lens, or the functions of reducing and enlarging the visual field of the image of the concave lens, so as to increase the depth of field. Is convenient to use. Correcting refractive error of the eye means correcting myopia, hyperopia, astigmatism, strabismus, and the like.
As a specific embodiment of the present invention, the following description will be made.
Referring to fig. 4, 6-1-upper plate, 6-2-left side plate, 6-3-right side plate, each is a reflector, and 6-4-lower plate may or may not be a reflector.
Referring to fig. 1-6, the utility model can make the peripheral vision to see far or feel far light at any time while reading and writing, so the effect of treating and preventing myopia is better, and the reading and writing is convenient and applicable.
The telescope can be a positive horn mouth or a negative horn mouth, and the angle of the telescope is only required to enable a reader to read and write while the periphery of eyes can see or unconsciously feel light reflected from a far position of the periphery through the telescope. The telescope can be a plane mirror.
The convex lens or the magnifying effect of the convex lens is mainly used for magnifying or zooming out the viewed object, so that the reader can read and write more conveniently and labor-saving.
As shown in fig. 2, the convex lens or lens group 11 is housed in a holder 12 and a screw cover 13, and the holder 12 is fixed to the back surface of the lower side of the telescope cover 4 by screws. Or can be fixed on the base 1. The lower jaw supporting plate and the base are arranged on the upper part of a bent rod of the screw deflection lifting adjusting mechanism, and the lower part of the bent rod is locked in a strip-shaped hole (shown in the figure) on the upper part of the lifting adjusting mechanism by a screw. The lifting mechanism 2 comprises a lifting rod, and the lifting rod is locked on a cylinder seat of the lifting mechanism by a screw (shown in the figure); or other lifting mechanisms. When the area of the convex lens 11 is large, the computer can be seen conveniently, as shown in fig. 6.
A convex lens or lens group 11 may also be incorporated in the structure of fig. 3 and 6. The figure is omitted.
The telescoping cover elevation adjustment mechanism and the telescoping cover angle adjustment mechanism may also be incorporated into the structure of fig. 3 and 6. The figure is omitted.
The support frame 1 is a seat type frame; the seat type frame can be folded and portable. Or the supporting frame 1 is a hanging frame and is fixedly hung on a roof or a wall. Or the support frame 1 is handheld.
Referring to fig. 4 and 5, the lower plate 6-4, or the lower side plate 7-1, is a convex lens, a black screen, a reflector, or a connecting plate, and a connecting frame, and the support frame 1 is fixed to the telescope cover through the connecting frame or the connecting plate, or directly fixed to the upper, left, or right side of the telescope cover.
When in use, the distance between the eyes and the eye holes 3 is also adjusted to be suitable, so as to be beneficial to meeting the use requirement.
Such as to take astigmatism into account when formulating spectacles for astigmatic patients.
The eye sight hole is: an aperture, a lens. The lens includes: plano-lenses, concave lenses, convex lenses, cylindrical lenses, prisms, fresnel lenses, bifocal and multifocal lenses, aspheric lenses, lens groups, anti-blue lenses, and the like. The height of the eye hole 3 is 30 mm-150 mm, and the width is 60 mm-300 mm. The width from the eye hole to the outer boundary of the telescope cover is 30 mm-1000 mm.
The reading and writing bedplate is used for reading and writing books and is of a ramp type or a flat type. When the main visual area 3 is a pair of visual holes for reading, writing or seeing, the holes 2 can be separated by a frame.
The convex lens is a spherical convex lens, or an aspherical convex lens, or a part of a convex lens.
The eye sight hole can also be a lens which can prevent and control the myopic periphery defocusing, etc.
A frame is arranged on a telescope cover of the reading and writing telescope or a supporting frame for supporting the telescope cover, and an illumination circuit, a lamp, a control dimming circuit and the like can be arranged on the frame for illumination during reading and writing.
When in use, the reflecting mirror or the long-distance scenery picture and the like can be fully distributed on the room (roof), the left and the right (surrounding wall surfaces) or all the walls and the top surfaces of the room, thus leading people to be completely positioned in the long-distance scenery and achieving good visual effect.
The utility model improves the sitting posture, corrects the body shape and can prevent the cervical vertebra and the lumbar from going wrong.
The utility model discloses an experimental report is as follows:
1. grouping experiments: (experiment time 4 years)
The effect of the invention is compared with the prior art using ZL200410098856.3 special near defocusing visual object training myopia prevention and treatment device products on the market. The test group was divided into 200 individuals of the invention and 200 individuals of the control group.
1) The first control group is a 4-12 year old child myopia and astigmatism patient, the utility model comprises 100 experimental groups and 100 comparison groups.
2) The second control group is a 13-20 year old teenager with myopia and astigmatism, the utility model comprises 100 experimental groups and 100 comparison groups.
2. The experimental method comprises the following steps: the table board can be used for reading and writing table cases, and for learning and games of computers, AIPs and mobile phones according to the same conditions. Experiment time: not less than 3 hours per day. The results were checked after 4 years and compared.
The experimental group of the utility model uses the instrument of embodiment 1, 3 or 6.
Within 4 years, regular inspection: and analyzing the change condition of the eye diopter through items such as subjective refraction and objective refraction.
3. The experimental results are as follows:
1) and the curative effect standard is as follows:
and (3) the effect is shown, the objective optometry degree is not increased, the corrected vision looks at the visual chart at the speed of 1 second, the vision is checked to be not reduced, the eye axis acceleration is lower than the average experience growth value of the same age, and B super-junction fruits are not abnormally changed.
Effective-the increase of the objective refraction number is lower than the average growth value of the same age, the corrected eyesight looks at the visual chart at the speed of 1 second, the eyesight is checked to be not reduced, the eye axis acceleration is lower than the average experience growth value of the same age, and the B-super-junction fruit has no abnormal change.
Invalid- -the increase of the objective refraction number reaches the average increase value of the same age, the vision is corrected according to the speed of 1 second, the visual chart is watched, the visual deterioration is checked, the eye axis speed increase is equal to the average experience increase value of the same age, and the result of the type-B ultrasonic is changed or not.
2) And the inspection result:
1) first control group: the experimental group comprises 100 patients, 90 patients with significant effect, 10 patients with effective effect and 0 patient with ineffective effect.
Comparative group 100: 28 effective, 47 effective and 25 ineffective.
2) Second control group: the experimental group had 100 patients, 75 patients with significant effect, 25 patients with effective effect and 0 patient with no effect.
Comparative group 100 persons: 34 effective persons, 34 effective persons and 32 ineffective persons.
Analysis and conclusion of experimental results: all 200 people of experimental group, the child who uses the utility model discloses prevent diopter increase completely has had breakthrough progress, and the effectual 165 people that reach account for 82.5% (approximately regard as suppression eye axis growth rate). Whereas all 200 persons in the control group, the children who completely prevented the diopter increase with the prior art contrast were 62 persons with significant effect, accounting for 31%. The utility model has obvious curative effect.
Claims (10)
1. Reading and writing telemicroscope, its characterized in that: the telescope comprises a telescope cover and a support frame (1) for supporting the telescope cover, wherein the telescope cover comprises eye sight holes (3), and telescope reflectors are arranged on the periphery of the eye sight holes (3); the peripheral of the eyes can see or unconsciously sense the light reflected from the far periphery through the telescope while the reader reads and writes.
2. The read-write telescope of claim 1, wherein: four radiation rays are made from the geometric center of the eye hole (3) or from the peripheral connecting line of the eye hole to the outside, the periphery of the eye hole is divided into 4 parts of the upper part, the left part, the right part and the lower part, the peripheries of the eye hole (3) except the lower part are all provided with a telescopic reflector, and the area of the telescopic reflector can cover the peripheral vision of the eye except the lower part by more than 50 percent and can be basically covered or fully covered.
3. The read-write telescope of claim 2, wherein: the shape of the whole telescope reflector arranged on the periphery of the telescope cover, namely the eye hole (3) except the lower part is divided into a convex surface type, a concave surface type or a plane type.
4. The read-write telescope of claim 3, wherein: the convex surface type comprises partial outer side surfaces of the prismatic table or partial convex curved surfaces; the concave surface type comprises part of the inner side surface of the frustum pyramid or comprises part of the concave curved surface; the prismatic table is a non-regular 4 prismatic table or a non-regular polygonal table.
5. The read-write telescope of claim 4, wherein: the non-regular 4-edge table has the smallest area below, the second area from left to right and the largest area above.
6. The read-write telescope of claim 1, wherein: the telescope reflector comprises a glass reflector, a metal reflector or a plastic coating reflector; the height of the eye hole is 20 mm-180 mm, and the width is 50 mm-250 mm.
7. The read-write telescope of claim 1, wherein: the support frame (1) also comprises a telescopic cover lifting adjusting mechanism and/or a telescopic cover angle adjusting mechanism which can be adjusted to a proper reading and writing position of a reader; a lower jaw supporting plate is arranged below the eye sight hole; the lower jaw supporting plate is an up-down lifting type or eccentric lifting type lower jaw supporting plate.
8. The read-write telescope of any of claims 1-7, wherein: and a lens is arranged at the position of and/or behind the eye hole, and comprises a convex lens, a concave lens, a Fresnel lens, a flat lens, a bifocal lens and a multifocal lens.
9. The read-write telescope of claim 8, wherein: the power of the convex lens is 0.25D to 2.50D; the power of the convex lens is 0.50D to 1.50D.
10. The read-write telescope of any of claims 1-7, wherein: the visual hole and/or the back of the visual hole are/is provided with a lens or a lens group, the power of the lens or the lens group can correct the ametropia of the eye, and the lens or the lens group also has the functions of enlarging and zooming the image of the convex lens or the functions of reducing and enlarging the visual field of the concave lens, and the function of increasing the depth of field.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201920919262.6U CN210323566U (en) | 2019-06-18 | 2019-06-18 | Reading and writing telescope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201920919262.6U CN210323566U (en) | 2019-06-18 | 2019-06-18 | Reading and writing telescope |
Publications (1)
Publication Number | Publication Date |
---|---|
CN210323566U true CN210323566U (en) | 2020-04-14 |
Family
ID=70144724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201920919262.6U Active CN210323566U (en) | 2019-06-18 | 2019-06-18 | Reading and writing telescope |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN210323566U (en) |
-
2019
- 2019-06-18 CN CN201920919262.6U patent/CN210323566U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107643597B (en) | Eye-protecting and shading device for intelligent glasses integrating real environments | |
CN201752480U (en) | Eye caring instrument | |
CN101829007A (en) | Lens device of trainer for myopia comprehensive therapy | |
WO2014194444A1 (en) | Spectacles for preventing and curing myopia by controlling head position and sitting posture | |
CN106821696A (en) | A kind of the remote of preventing and treating myopia of student sees write device and application method | |
CN114209559B (en) | Image display method, device and system | |
CN210323564U (en) | Reading and writing telegauge | |
CN210323566U (en) | Reading and writing telescope | |
CN103018921A (en) | Posture correcting and protective eyeglasses | |
EA013804B1 (en) | Myopia prevention instrument | |
CN210090848U (en) | Reading and writing telegauge | |
CN201710602U (en) | Lens device of comprehensive nearsightedness treatment trainer | |
US20230024546A1 (en) | Vision test apparatus, method and system and non-transient computer readable recording medium | |
CN213846822U (en) | Short-distance object image amplification video projector for myopia prevention and control of teenagers | |
CN2734001Y (en) | Multifunctional desk with eyesight protection function | |
CN110082903A (en) | Mirror is looked far into the distance in read-write | |
CN106950720B (en) | Intelligent control vision correction mirror | |
CN208355728U (en) | Visual performance instrument for training | |
CN1071518A (en) | Health glasses for reading and writing | |
CN110133838A (en) | Instrument is looked far into the distance in read-write | |
CN211506047U (en) | Reading device for preventing and controlling myopia | |
CN112904572A (en) | Reader and display system | |
Wright | Careers and vocational education | |
CN112904570A (en) | Reading correcting device of reader | |
CN110109263A (en) | Instrument is looked far into the distance in a kind of read-write |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |