CN106821298A - A kind of Vission detector - Google Patents
A kind of Vission detector Download PDFInfo
- Publication number
- CN106821298A CN106821298A CN201710045717.1A CN201710045717A CN106821298A CN 106821298 A CN106821298 A CN 106821298A CN 201710045717 A CN201710045717 A CN 201710045717A CN 106821298 A CN106821298 A CN 106821298A
- Authority
- CN
- China
- Prior art keywords
- sighting target
- substrate
- tooth bar
- vission detector
- rotating disk
- 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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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
Abstract
The invention belongs to eyesight detection technique field, it is related to a kind of Vission detector, which solves existing Vission detector and be more expensive to manufacture, adjust the low technical problem of efficiency.This Vission detector includes support, substrate is provided with support, some groups of sighting target groups are provided with the outer plate surface of substrate, each sighting target group is distributed along the vertical direction of substrate, same sighting target group includes several rotating disks along substrate level directional spreding, the inner ends thereof of rotating disk is arranged on substrate, post sighting target in the outer end of rotating disk, it is provided with making the transmission mechanism of both synchronous axial systems between the two neighboring rotating disk of same sighting target group, the driving source for driving one of rotating disk to rotate is provided with the inner plate surface of substrate.This Vission detector can be to be capable of achieving the same group of regulation of sighting target by a driving source, can improve regulation efficiency, reduce manufacturing cost.
Description
Technical field
The invention belongs to eyesight detection technique field, it is related to a kind of Vission detector.
Background technology
Visual chart is used for giving a test of one's eyesight, and equipment is simple, easy to use, but because the letter on visual chart is all fixed
And quantity is few, somebody is easy to remember in advance, causes testing result uncomfortable, especially for the inspection that some are required to eyesight
Occasion is surveyed, is influenceed by interests etc. are many, somebody can practise fraud.
The B of Chinese patent CN 104739362 disclose a kind of remote control adjustable visual chart, and it includes being connected by shell and panel
Casing, be arranged in parallel base plate and guide plate in casing, and sighting target rotation system is equipped between base plate and guide plate, is led
To the control circuit board that control sighting target rotation system is fixedly installed on plate, sighting target rotation system includes being fixedly installed on base plate
Lampshade and be fixed on the sighting target of lampshade one end that motor and the rotary sleeve and rotary sleeve of motor drive connection are fixed, in lampshade
Lamp socket is equipped with, one group of LED bulb is fixedly installed on lamp socket.
Above-mentioned visual chart, equipped with remote control, sets 15 buttons in order to avoid tested personnel's cheating on remote control, one is
Switch, 14 is sighting target rotating illuminating button.One of rotary knob is pressed, corresponding sighting target Random-Rotation is simultaneously positioned.
But, above-mentioned visual chart presses a button, can only control a rotation for sighting target, adjusts less efficient, and should
Structure necessarily requires to be equipped with single a set of control circuit or drive mechanism for each sighting target, comparatively manufacturing cost
Also it is very big.
The content of the invention
The present invention be directed to the above mentioned problem that existing technology is present, there is provided a kind of Vission detector, the present invention is wanted
The technical problem of solution is:The manufacturing cost of this Vission detector how is reduced, sighting target regulation efficiency is improved.
The purpose of the present invention can be realized by following technical proposal:
A kind of Vission detector, the Vission detector includes support, and substrate, the base are provided with the support
Some groups of sighting target groups are provided with the outer plate surface of plate, each sighting target group is distributed along the vertical direction of substrate, it is characterised in that same to regard
Mark group includes several rotating disks along substrate level directional spreding, and the inner ends thereof of the rotating disk is arranged on substrate, described turn
Sighting target is posted in the outer end of disk, is provided with making the driver of both synchronous axial systems between the two neighboring rotating disk of same sighting target group
Structure, is provided with the driving source for driving one of rotating disk to rotate on the inner plate surface of the substrate.
Its operation principle is as follows:This Vission detector when in use, prevents tested personnel from practising fraud if desired for regulation sighting target
When, one of rotating disk can be driven to rotate by driving source, due to being provided with transmission mechanism between each rotating disk of same sighting target group,
Therefore, each rotating disk of same sighting target group can synchronous axial system, and then adjust each sighting target angle in same sighting target group simultaneously, it is to avoid quilt
Inspection personnel practise fraud.Due to being designed with transmission mechanism, a driving source is to be capable of achieving the same group of regulation of sighting target, can improve regulation effect
Rate, reduces manufacturing cost.Some groups of sighting target groups are vertically distributed, and are to describe sighting target group as a unit, and such as
Fruit is defined with each sighting target in same sighting target group, and each sighting target is again horizontally disposed, the distribution mode and existing skill
Visual chart in art is the same, is not repeated here herein.
In a kind of above-mentioned Vission detector, the substrate vertically offers two bar holes one, two
The bar hole one is through substrate and respectively positioned at the both sides of the sighting target group;The Vission detector is also included positioned at described
The baffle plate of substrate front side, the left and right sides of the baffle plate is bent to form flanging towards orientation substrate, and the flanging is slideably positioned in two
In individual bar hole one.After being designed with baffle plate, can be by the sighting target below moving stop bumping post, so as to facilitate examinee to watch correspondence
Sighting target.
In a kind of above-mentioned Vission detector, used as a kind of scheme, the inner of the rotating disk is connected with a rotating shaft, institute
Rotating shaft is stated through the substrate and is connected with the substrate rotating, the transmission mechanism includes driven gear and travelling gear, described
Driven gear is sheathed in the rotating shaft, and the travelling gear is rotated and is arranged on the inner plate surface of substrate, and the travelling gear is located at
Between two neighboring driven gear, and it is meshed with two adjacent driven gears.As above design, when one of rotating disk turns
It is dynamic, the driven gear for engaging can be driven to rotate by travelling gear, and then drive other rotating disks to rotate;It is noticeable
It is that can also design rotating shaft, rotating disk and sighting target at this on travelling gear, can be thus accommodated in same group of sighting target group more
Sighting target, this with visual chart in the design that gradually increases of sighting target quantity from top to bottom be adaptable.
In a kind of above-mentioned Vission detector, the sighting target in different sighting target groups is in different size, in different sighting target groups
The size uniformity of driven gear that is connected of sighting target cause, the driven gear is consistent with the size of travelling gear.When sighting target chi
When very little smaller, then only one of which travelling gear between the driven gear of two neighboring sighting target;And when sighting target size is larger, then phase
Multiple travelling gears can be then designed between adjacent two sighting targets;As above design, it is possible to decrease design cost and die sinking cost, and then reduce
The manufacturing cost of this Vission detector.
In a kind of above-mentioned Vission detector, the driving source includes the tooth bar one parallel with the bar hole one,
The tooth bar one is arranged on one of flanging of the baffle plate and can vertically move, and the tooth bar one can pass through
The movement of vertical direction is meshed and separates with a driven gear in each sighting target group.After being designed with tooth bar one, when need adjust
Section rotates sighting target, then removable carry-over bar one makes tooth bar one be engaged with the driven gear on most side, then slide damper, drives driven
Pinion rotation, and then the sighting target of same sighting target group is rotated, realize quick regulation.
In a kind of above-mentioned Vission detector, the length of the tooth bar one is 1 with the girth ratio of the driven gear:
4.Both length ratio is as above designed, it is ensured that tooth bar one is separated from being engaged to, driven tooth when sliding with a driven gear
Wheel just rotates 90 degree, then sighting target just converts a position, for detected person's viewing.
In a kind of above-mentioned Vission detector, the tooth bar one offers bar hole two, the folding in the horizontal direction
The guide pillar being plugged in the bar hole two is provided with side, a spring phase is passed through between the guide pillar and one end of bar hole two
Connection, when the spring is in original state, the tooth bar one is separated with driven gear.After being designed with guide pillar and spring,
Can ensure in the state of without regulation, tooth bar one is separated with driven gear, and now moving stop does not interfere with sighting target yet;And
When needed, mobile rack one makes it be engaged with driven gear, simple and quick.
In a kind of above-mentioned Vission detector, the inner plate surface of the substrate is provided with tooth bar two and drive gear, institute
State tooth bar two positioned at the outside of the tooth bar one and both be parallel to each other, the drive gear rotate be arranged on substrate and with institute
The flank of tooth for stating tooth bar two is meshed, and the tooth bar two is vertically arranged at intervals with several and can be affixed with the tooth bar one
The roller for leaning on, and when the rolling wheel and rack one mutually reclines, the tooth bar one can be meshed with the driven gear.Design
After having roller, for the moment, tooth bar one can be moved inward and driven gear mobile rack in part fixed position under the top power of roller
Engagement, tooth bar one is continued to move to, then driven gear can be driven to rotate, and realizes the regulation of sighting target;And it is designed with drive gear and tooth
Bar two, by the displacement of drive gear adjusting gear rack two, and then can control the position of roller, final adjusting gear rack one it is adjustable which
The distance between several groups of sighting target groups, two neighboring roller are equal to the distance between driven gear in adjacent three groups of sighting target groups.
Compared with prior art, the present invention has advantages below:
1st, this Vission detector when in use, when preventing tested personnel from practising fraud if desired for regulation sighting target, can be by driving
Source drives one of rotating disk to rotate, due to being provided with transmission mechanism between each rotating disk of same sighting target group, therefore, same sighting target
Each rotating disk of group can synchronous axial system, and then adjust each sighting target angle in same sighting target group simultaneously, it is to avoid tested personnel's cheating;
2nd, after being designed with tooth bar one, when regulation rotation sighting target is needed, then removable carry-over bar one makes on tooth bar one and most side
Driven gear is engaged, then slide damper, drives driven gear to rotate, and then rotates the sighting target of same sighting target group, is realized fast
Velocity modulation section;
3rd, the length of tooth bar one and the girth ratio of the driven gear are 1:4, it is ensured that tooth bar one slide when, with one from
Moving gear just rotates 90 degree from separation, driven gear is engaged to, then sighting target just converts a position, is seen for detected person
See;
4th, after being designed with guide pillar and spring, it is ensured that in the state of without regulation, tooth bar one is separated with driven gear, this
When moving stop do not interfere with sighting target yet;And when needed, mobile rack one makes it be engaged with driven gear, behaviour
Make simple and fast.
Brief description of the drawings
Fig. 1 is the front view of this Vission detector.
Fig. 2 is the rearview of this Vission detector.
Fig. 3 is partial enlarged drawing of the invention.
In figure, 1, support;2nd, substrate;3rd, rotating disk;4th, sighting target;5th, bar hole one;6th, baffle plate;7th, flanging;8th, driven gear;
9th, travelling gear;10th, tooth bar one;11st, bar hole two;12nd, guide pillar;13rd, spring;14th, tooth bar two;15th, drive gear;16th, roll
Wheel.
Specific embodiment
The following is specific embodiment of the invention and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
As shown in Figure 1, Figure 2, Figure 3 shows, this Vission detector includes support 1, and substrate 2 is provided with support 1, substrate 2
Some groups of sighting target groups are provided with outer plate surface, each sighting target group is distributed along the vertical direction of substrate 2, and same sighting target group includes several
Along the rotating disk 3 that the horizontal direction of substrate 2 is distributed, the inner ends thereof of rotating disk 3 is arranged on substrate 2, and sighting target 4 is posted in the outer end of rotating disk 3,
It is provided with making the transmission mechanism of both synchronous axial systems, the inner plate surface of substrate 2 between the two neighboring rotating disk 3 of same sighting target group
On be provided with driving the driving source that one of rotating disk 3 rotates.Specifically, substrate 2 vertically offers two
Bar hole 1, two bar holes 1 are through substrate 2 and respectively positioned at the both sides of sighting target group;Vission detector also includes being located at
The positive baffle plate 6 of substrate 2, the left and right sides of baffle plate 6 is bent to form flanging 7 towards the direction of substrate 2, and flanging 7 is slideably positioned in two
In bar hole 1.
The inner of rotating disk 3 is connected with a rotating shaft, and rotating shaft is connected through substrate 2 and with the substrate 2 rotation, and transmission mechanism includes
Driven gear 8 and travelling gear 9, driven gear 8 are sheathed in rotating shaft, and travelling gear 9 rotates the inner plate surface for being arranged at substrate 2
On, the travelling gear 9 is located between two neighboring driven gear 8, and is meshed with two adjacent driven gears 8.
Sighting target 4 in different sighting target groups is in different size, the driven gear 8 that the sighting target 4 in different sighting target groups is connected
Size uniformity is caused, and driven gear 8 is consistent with the size of travelling gear 9.
As shown in Figure 1, Figure 2, Figure 3 shows, in the present embodiment, driving source includes the tooth bar one 10 parallel with bar hole 1, tooth bar
One 10 are arranged on one of flanging 7 of baffle plate 6 and can vertically move, and tooth bar 1 can be by vertical direction
Movement is meshed and separates with a driven gear 8 in each sighting target group.
Preferably, the length of tooth bar 1 is 1 with the girth ratio of driven gear 8:4.Tooth bar 1 is opened in the horizontal direction
Bar hole 2 11 is provided with, the guide pillar 12 being plugged in the bar hole 2 11, guide pillar 12 and bar hole 2 11 are provided with flanging 7
It is connected by a spring 13 between one end, when spring 13 is in original state, tooth bar 1 and the phase of driven gear 8 are divided
From.The inner plate surface of substrate 2 is provided with tooth bar 2 14 and drive gear 15, and tooth bar 2 14 is located at the outside of tooth bar 1 and both phases
Mutually parallel, drive gear 15 rotates and is arranged on substrate 2 and is meshed with the flank of tooth of tooth bar 2 14, and tooth bar 2 14 is vertically
Several rollers 16 that can be mutually reclined with tooth bar 1 are arranged at intervals with, and when roller 16 mutually reclines with tooth bar 1, tooth
Bar 1 can be meshed with driven gear 8.
Operation principle of the invention is as follows:This Vission detector when in use, tested person is prevented if desired for regulation sighting target
During member's cheating, when regulation rotation sighting target is needed, then removable carry-over bar one makes tooth bar one be engaged with the driven gear on most side, then
Slide damper, drives driven gear to rotate, and then rotates the sighting target of same sighting target group, realizes quick regulation.Regarded due to same
Be provided with transmission mechanism between each rotating disk of mark group, therefore, each rotating disk of same sighting target group can synchronous axial system, and then adjust simultaneously
Each sighting target angle in same sighting target group, it is to avoid tested personnel's cheating.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from spirit of the invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of Vission detector, the Vission detector includes support (1), and substrate is provided with the support (1)
(2) some groups of sighting target groups, are provided with the outer plate surface of the substrate (2), each sighting target group is distributed along the vertical direction of substrate (2),
Characterized in that, same sighting target group include several along substrate (2) horizontal direction be distributed rotating disk (3), the rotating disk (3) it is interior
End rotation is arranged on substrate (2), and sighting target (4), the two neighboring rotating disk of same sighting target group are posted in the outer end of the rotating disk (3)
(3) it is provided with making the transmission mechanism of both synchronous axial systems between, is provided with driving on the inner plate surface of the substrate (2)
The driving source that one of rotating disk (3) rotates.
2. a kind of Vission detector according to claim 1, it is characterised in that the substrate (2) is vertically opened
Two bar holes one (5) are provided with, two bar holes one (5) are through substrate (2) and respectively positioned at the both sides of the sighting target group;
The Vission detector also includes being located at the substrate (2) positive baffle plate (6), and the left and right sides of the baffle plate (6) is towards base
Plate (2) direction is bent to form flanging (7), and the flanging (7) is slideably positioned in two bar holes one (5).
3. a kind of Vission detector according to claim 2, it is characterised in that the inner connection of the rotating disk (3)
There is a rotating shaft, the rotating shaft is connected through the substrate (2) and with the substrate (2) rotation, and the transmission mechanism includes driven tooth
Wheel (8) and travelling gear (9), the driven gear (8) are sheathed in the rotating shaft, and the travelling gear (9) rotates and is arranged at
On the inner plate surface of substrate (2), the travelling gear (9) is between two neighboring driven gear (8) and driven with adjacent two
Gear (8) is meshed.
4. a kind of Vission detector according to claim 3, it is characterised in that the sighting target (4) in different sighting target groups is big
Small different, the size uniformity of the driven gear (8) that the sighting target (4) in different sighting target groups is connected is caused, the driven gear (8)
Size with travelling gear (9) is consistent.
5. a kind of Vission detector according to claim 4, it is characterised in that the driving source includes and the bar shaped
The parallel tooth bar one (10) in hole one (5), the tooth bar one (10) be arranged on one of flanging (7) of the baffle plate (6) and
Can vertically move, the tooth bar one (10) can be by a driven tooth in the movement of vertical direction and each sighting target group
Wheel (8) is meshed and separates.
6. a kind of Vission detector according to claim 5, it is characterised in that the length of the tooth bar one (10) and institute
The girth ratio for stating driven gear (8) is 1:4.
7. a kind of Vission detector according to claim 6, it is characterised in that the tooth bar one (10) is in the horizontal direction
Bar hole two (11) is offered, the guide pillar (12) being plugged in the bar hole two (11) is provided with the flanging (7), it is described to lead
It is connected by a spring (13) between post (12) and one end of bar hole two (11), when the spring (13) is in initial shape
During state, the tooth bar one (10) is separated with driven gear (8).
8. a kind of Vission detector according to claim 7, it is characterised in that the inner plate surface of the substrate (2) is set
There are tooth bar two (14) and drive gear (15), the tooth bar two (14) is positioned at the outside of the tooth bar one (10) and both are mutually flat
OK, the drive gear (15) rotates and is arranged on substrate (2) and is meshed with the flank of tooth of the tooth bar two (14), the tooth bar
Two (14) are vertically arranged at intervals with the roller (16) that several can mutually recline with the tooth bar one (10), and when described
When roller (16) mutually reclines with tooth bar one (10), the tooth bar one (10) can be meshed with the driven gear (8).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710045717.1A CN106821298B (en) | 2017-01-20 | 2017-01-20 | A kind of Vission detector |
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CN201710045717.1A CN106821298B (en) | 2017-01-20 | 2017-01-20 | A kind of Vission detector |
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CN106821298A true CN106821298A (en) | 2017-06-13 |
CN106821298B CN106821298B (en) | 2018-05-25 |
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ID=59120652
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CN201710045717.1A Active CN106821298B (en) | 2017-01-20 | 2017-01-20 | A kind of Vission detector |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107260119A (en) * | 2017-06-23 | 2017-10-20 | 苏州奥特科然医疗科技有限公司 | A kind of Vission detector |
CN109700425A (en) * | 2018-12-27 | 2019-05-03 | 唐钦弘 | A kind of colour blindness test equipment |
CN111166282A (en) * | 2020-02-20 | 2020-05-19 | 徐翠英 | Clinical eyesight detection device of medical treatment |
CN111297318A (en) * | 2020-02-20 | 2020-06-19 | 徐翠英 | Be used for clinical eyesight check out test set of medical treatment |
CN112336299A (en) * | 2020-10-27 | 2021-02-09 | 安徽中视眼科医生集团管理合伙企业(普通合伙) | Vision detection device |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2122596U (en) * | 1992-04-30 | 1992-11-25 | 陆小平 | Rotary visual chart |
US5801809A (en) * | 1996-11-06 | 1998-09-01 | Husain; Abbas M. | Eye chart with color vision screening |
JP2002204783A (en) * | 2001-01-10 | 2002-07-23 | Naitsu:Kk | Visual acuity examining system for near vision |
CN201135425Y (en) * | 2007-12-04 | 2008-10-22 | 郭明中 | Visual acuity test chart against remembering aid |
CN201691899U (en) * | 2010-06-26 | 2011-01-05 | 祁育新 | Rotatable visual testing chart |
CN202477650U (en) * | 2011-12-29 | 2012-10-10 | 刘泽兵 | Anti-memorization visual chart |
CN203408028U (en) * | 2013-05-13 | 2014-01-29 | 吴善锁 | Anti-cheating visual chart |
CN104739362A (en) * | 2015-02-13 | 2015-07-01 | 富阳学院 | Remote control adjustable visual acuity chart |
-
2017
- 2017-01-20 CN CN201710045717.1A patent/CN106821298B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2122596U (en) * | 1992-04-30 | 1992-11-25 | 陆小平 | Rotary visual chart |
US5801809A (en) * | 1996-11-06 | 1998-09-01 | Husain; Abbas M. | Eye chart with color vision screening |
JP2002204783A (en) * | 2001-01-10 | 2002-07-23 | Naitsu:Kk | Visual acuity examining system for near vision |
CN201135425Y (en) * | 2007-12-04 | 2008-10-22 | 郭明中 | Visual acuity test chart against remembering aid |
CN201691899U (en) * | 2010-06-26 | 2011-01-05 | 祁育新 | Rotatable visual testing chart |
CN202477650U (en) * | 2011-12-29 | 2012-10-10 | 刘泽兵 | Anti-memorization visual chart |
CN203408028U (en) * | 2013-05-13 | 2014-01-29 | 吴善锁 | Anti-cheating visual chart |
CN104739362A (en) * | 2015-02-13 | 2015-07-01 | 富阳学院 | Remote control adjustable visual acuity chart |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107260119A (en) * | 2017-06-23 | 2017-10-20 | 苏州奥特科然医疗科技有限公司 | A kind of Vission detector |
CN109700425A (en) * | 2018-12-27 | 2019-05-03 | 唐钦弘 | A kind of colour blindness test equipment |
CN111166282A (en) * | 2020-02-20 | 2020-05-19 | 徐翠英 | Clinical eyesight detection device of medical treatment |
CN111297318A (en) * | 2020-02-20 | 2020-06-19 | 徐翠英 | Be used for clinical eyesight check out test set of medical treatment |
CN112336299A (en) * | 2020-10-27 | 2021-02-09 | 安徽中视眼科医生集团管理合伙企业(普通合伙) | Vision detection device |
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