CN2650701Y - Eyesight tester - Google Patents
Eyesight tester Download PDFInfo
- Publication number
- CN2650701Y CN2650701Y CN 03252949 CN03252949U CN2650701Y CN 2650701 Y CN2650701 Y CN 2650701Y CN 03252949 CN03252949 CN 03252949 CN 03252949 U CN03252949 U CN 03252949U CN 2650701 Y CN2650701 Y CN 2650701Y
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- China
- Prior art keywords
- test
- vision
- eyepiece
- sight
- dial plate
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Abstract
The utility model discloses an eyesight testing device. The optical axis of the eye lens (3) is coaxially to the center of the testing component (12) on the eyesight dial, and the testing component is in the optical focal plane of the eye lens; the eyesight dial (11) is arranged on the lower part of the shell and is fixed to a drive gear (8) via a drive shaft (6) and fitted to a shaft sleeve (18) in a movable manner. Fourteen testing components that can rotate are evenly distributed on the circumference of the eyesight dial. The device is characterized in accurate and quick testing performance, and is especially suitable for eyesight testing accurately, objectively, and justly in medical institutions, and has a wide range of application.
Description
Technical field
This utility model belongs to eye eyesight test equipment technical field, is specifically related to a kind of optical principle of utilizing and makes the sight test means that can detect experimenter's vision quickly and easily.
Background technology
The factor that causes human eyesight to descend is many-sided, as because do not note eye hygiene, excess eye-using or other pathological changes or the like.People can carry out eyesight testing for different purposes in daily life, often are necessary for the tracking and testing for the treatment ophthalmic.Basic method of testing is exactly to adopt the eyesight testing table of always continuing to use to test.Generally need other people assistance during test, experimenter oneself test is then very inconvenient.And need bigger spatial environments and lighting condition with eyesight testing table test.Sometimes the test of vision has jural meaning again, even the test result of vision will produce significant impact to a people's destiny, as obtaining employment, enter a higher school, join the army etc.Some is artificial obtains the test result that needs, does not stint and adopts silent method fraud detection personnel back to the number visual acuity charts to get by under false pretences.Obviously existing logarithmic visual acuity chart exists the deficiency that can't overcome.For this reason, the design people utilizes optical principle through concentrating on studies, and has developed a kind of sight test means that can objectively and impartially detect experimenter's vision quickly and easily.Evidence, effect is good.
The innovation and creation content
1, the technical problem that will solve
It is a kind of simple in structure that the purpose of this utility model is to provide, and is easy to processing and fabricating, easy and simple to handle, the sight test means that can detect experimenter's vision quickly and easily.
2, technical scheme
This utility model is achieved in that and comprises sight test means and optical viewing arrangement, and the eyepiece of optical viewing arrangement is fixed on the eyepiece stalk by eyepiece hood, and the place, right angle in the eyepiece stalk is provided with illuminator for 45 °; The vision dial plate of sight test means is arranged at the housing middle and lower part, by power transmission shaft and travelling gear is affixed and with axle sleeve movingly, the rotating torque that two travelling gears are meshing with each other handwheel passes to the vision dial plate; Rotate synchronously with handwheel with the vision parameter reading dial of the coaxial setting of handwheel; Vision dial plate upper edge be evenly distributed in 14 can rotation test component, portrayal has the test pattern " E " that is arranged in order corresponding to 14 sizes that convert by national eyesight testing standard on it, the optical axis of optical viewing arrangement is coaxial with the center of the test component of vision dial plate, and test component is positioned on the eyepiece optics focal plane.
3, beneficial effect
This utility model utilizes optical principle, measuring distance is dwindled greatly, and realization is simple in structure, easy and simple to handle to the test of the accurate objective and fair of experimenter's vision, has promotional value widely.
Description of drawings
Below in conjunction with accompanying drawing and embodiment this utility model is further described, but this utility model is not limited to shown in the accompanying drawing.
Fig. 1 partly cuts open front view for this utility model overall structure;
Fig. 2 is that the AA of Fig. 1 is to half sectional view;
Fig. 3 is that the BB of Fig. 1 is to view;
Fig. 4 is the left view of Fig. 1;
Fig. 5 is the test pattern parts overall structure zoomed-in view of this utility model.
The specific embodiment
As shown in the figure, this utility model comprises sight test means and optical viewing arrangement, and eyepiece 3 is fixed on the eyepiece stalk by eyepiece hood 4, and the place, right angle in the eyepiece stalk 2 is provided with illuminator 5 for 45 °, and its light that will come from test component reflexes in the eyepiece; The vision dial plate 11 of sight test means is arranged at housing 1 middle and lower part, and is affixed by power transmission shaft 6 and travelling gear, and with axle sleeve 18 movingly, the rotating torque that two travelling gears 8 are meshing with each other handwheel 7 passes to vision dial plate 11; Rotate synchronously with handwheel with the vision parameter reading dial 9 of handwheel 7 coaxial settings; Be uniformly distributed with along the circumference on the vision dial plate 11 14 can rotation test component 12, portrayal has the test pattern " E " that is arranged in order corresponding to 14 sizes that convert by national eyesight testing standard on it, the optical axis of optical viewing arrangement is coaxial with test component 12 centers of vision dial plate, and test component 12 is positioned on the optics focal plane of eyepiece.
Reading circumference place corresponding to vision parameter reading dial 9 on housing 1 is provided with reading window 10.Rear, housing 1 bottom is provided with moving tooth hole 16 corresponding to the test component position.
On four the vertical directions in the cylindrical side of each test component 12, be provided with the arrow 17 of expression test pattern " E " opening direction.Wherein ← opening of expression " E " left, the opening of → expression " E " to the right, the opening of ↑ expression " E " upwards or inwardly, Open Side Down or outwards in ↓ expression " E ".Be convenient to the actual aperture direction that the tester grasps " E ", whether correct with the observation of judging the experimenter with statement, obtain test result accurately, avoided the silent intentionally back of the body test pattern of experimenter to cause testing the inaccurate drawback that produces.
Described travelling gear 8 is a bevel gear.
Test pattern should use optics (resin) glass to scribe; Miscellaneous part all can be made of plastics or metal material.
Operation principle of the present utility model and work process:
Visual acuity chart rim circumference is divided into ten quarters, every part sector angle be 25 ° 43 '.The size of each side view " E " word and the thickness of lines thereof, determine according to the focal length of device eyepiece, the Focus length in the device, and according to after the conversion of logarithmic visual acuity chart CNS, portray successively on the test component of vision dial plate relevant position, as the basic standard that gives a test of one's eyesight (
), depict the vision reading accordingly at vision parameter reading dial 9, along with handwheel rotates, drive the corresponding rotation of vision dial plate, vision parameter reading dial 9 accurately reflects the vision parameter index by test pattern on the test component of optical axis.
During the test vision, certain one-level eyesight testing figure is transferred to optical axis position, begins to observe with eyes, the tester adjusts the direction of test component arbitrarily, the opening direction of " E " is provided with at random, integration test experimenter's resolving ability.If can see clearly, more high-grade test pattern is transferred to optical axis position continues test, if still can see clearly, continue to raise, if do not see, previous test result is exactly experimenter's a vision parameter value.Vice versa.
The utlity model has simple in structure, easy and simple to handle, the test accurate quick characteristics, especially suitable Close in medical institutions and realize experimenter's eyesight is carried out the test of accurate objective and fair, have widely and push away Wide using value.
Claims (7)
1, a kind of sight test means, comprise sight test means and optical viewing arrangement, the eyepiece of optical viewing arrangement (3) is fixed on the eyepiece stalk by eyepiece hood (4), place, right angle in the eyepiece stalk of optical viewing arrangement (2) is provided with illuminator (5) for 45 °, it is characterized in that: eyepiece (3) optical axis is coaxial with test component (12) center of the vision dial plate (11) of sight test means, and test component (12) is positioned on the eyepiece optics focal plane; Vision dial plate (11) by power transmission shaft (6) and travelling gear (8) affixed and with axle sleeve (18) movingly, the rotating torque that two travelling gears (8) are meshing with each other handwheel (7) passes to vision dial plate (11); Rotate synchronously with handwheel with the vision parameter reading dial (9) of the coaxial setting of handwheel (7); Be uniformly distributed with along the circumference on the vision dial plate (11) 14 can rotation test component (12), portrayal has the test pattern " E " that is arranged in order corresponding to (14) individual size that converts by national eyesight testing standard on it.
2, sight test means as claimed in claim 1, it is characterized in that: described test component (12) respectively with last 14 apertures of vision dial plate (11) movingly, its excircle is provided with moving tooth, and portrayal has test pattern " E on test component (12) the central, transparent visual acuity chart sheet.
3, sight test means as claimed in claim 1 is characterized in that: the reading circumferential position of going up corresponding to vision parameter reading dial 9 at housing (1) is provided with reading window (10).
4, sight test means as claimed in claim 1 is characterized in that: housing (1) rear, bottom is provided with moving tooth hole (16) corresponding to test component (12) position.
5, sight test means as claimed in claim 1 is characterized in that: described travelling gear (8) is a bevel gear.
6, sight test means as claimed in claim 1 or 2 is characterized in that: on four mutually perpendicular directions in the cylindrical side of each test component (12), be provided with the arrow (17) of expression test pattern " E " opening direction.
7, as claim 1 or 5 described sight test means, it is characterized in that: vision dial plate (11) is provided with illuminating lamp (13) with respect to eyepiece optical axis test component (12) below, and power supply provides after by voltage regulation part (15) voltage stabilizing, and is controlled by switch (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03252949 CN2650701Y (en) | 2003-09-24 | 2003-09-24 | Eyesight tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03252949 CN2650701Y (en) | 2003-09-24 | 2003-09-24 | Eyesight tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2650701Y true CN2650701Y (en) | 2004-10-27 |
Family
ID=34328132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03252949 Expired - Fee Related CN2650701Y (en) | 2003-09-24 | 2003-09-24 | Eyesight tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2650701Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104644118A (en) * | 2014-05-30 | 2015-05-27 | 融水苗族自治县人民医院 | Eyesight detector |
-
2003
- 2003-09-24 CN CN 03252949 patent/CN2650701Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104644118A (en) * | 2014-05-30 | 2015-05-27 | 融水苗族自治县人民医院 | Eyesight detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041027 |