CN102415871A - Chart for near vision test with distance positioning draw bar - Google Patents
Chart for near vision test with distance positioning draw bar Download PDFInfo
- Publication number
- CN102415871A CN102415871A CN2010102958089A CN201010295808A CN102415871A CN 102415871 A CN102415871 A CN 102415871A CN 2010102958089 A CN2010102958089 A CN 2010102958089A CN 201010295808 A CN201010295808 A CN 201010295808A CN 102415871 A CN102415871 A CN 102415871A
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- draw bar
- distance
- grade
- near vision
- pull bar
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Abstract
The invention discloses a chart for a near vision test with a distance positioning draw bar, which comprises a sighting target base plate, a first-grade draw bar, a second-grade draw bar and a frontal plate, wherein the base part of the first-grade draw bar is fixedly connected with the sighting target base plate; the second-grade draw bar is plugged and connected into the first-grade draw bar; the frontal plate is connected to the tail end of the second-grade draw bar. When a 250mm-distance test is carried out, the second-grade draw bar can be wholly pushed in the first-grade draw bar when only the first-grade draw bar is in use; and when a 400mm-distance test is carried out, the second-grade draw bar is wholly drawn out of the first-grade draw bar. When the chart for the near vision test with the distance positioning draw bar is used for testing vision, two testing distances can be chosen; and when in testing, the forehead of a user to be tested is pressed on the frontal plate, and since the distance between the fontal plate and the sighting target base plate is determined, the vision testing result is accurate. The chart for the near vision test with the distance positioning draw bar disclosed by the invention is very suitable for household use and can be used for testing the vision of children (students) at any time, so that nearsightedness can be found, treated or corrected in time.
Description
Technical field
The present invention relates to a kind of near vision test type.
Background technology
The detection distance that existing near vision test type is generally stipulated when giving a test of one's eyesight is 250 millimeters or 400 millimeters; It is unlike distant vision test chart; The distance that detects is 5000 millimeters promptly 5 meters far away, its range difference tens millimeters accuracys that do not influence the judgement vision when giving a test of one's eyesight.And near vision test type detection range difference tens millimeters its testing results differ more.How distance during detection between human eye and the visual acuity chart is controlled on the distance of standard is the problem that needs solve.
Summary of the invention
The objective of the invention is for solve existing near vision test type generally when giving a test of one's eyesight the detection distance of regulation be 250 millimeters or 400 millimeters; It is unlike distant vision test chart; The distance that detects is 5000 millimeters promptly 5 meters far away, its range difference tens millimeters accuracys that do not influence the judgement vision when giving a test of one's eyesight.And near vision test type detection range difference tens millimeters its testing results differ more problem, and then provide a kind of with the near vision test type apart from positioning tie bar.
The present invention includes sighting target substrate, first order pull bar, second level pull bar and frontal plate, the base portion of first order pull bar is fixedly connected with the sighting target substrate, and second level pull bar is plugged in the first order pull bar, and the tail end of second level pull bar is connected with frontal plate.
When the present invention uses the 250mm distance detecting, only use first order pull bar to be about to second level pull bar and all be advanced in the first order pull bar, when using the 400mm distance detecting second level pull bar all pulled out in the first order pull bar and get final product.
Beneficial effect of the present invention: have two detections distance available when the present invention gives a test of one's eyesight, during detection, detected person's forehead is attached on the frontal plate, because the distance of frontal plate and sighting target substrate configures, so the testing result of vision is accurately.The present invention is fit to family and uses very much, and vision that can detection at any time child (student) accomplishes in time to find myopia, in time treatment or myopia correction.
In addition, the present invention is a Tiebar structure,,, when giving a test of one's eyesight, if the unified distance of regulation is 300mm, can this segment distance can be detected well with the accurate amount of chi to can elongation gradually perhaps shortening between the 400mm distance in the 250mm distance.
Description of drawings
Fig. 1 is the sketch map (vertical view) that use first order pull bar that the specific embodiment of the present invention provides gives a test of one's eyesight,
Fig. 2 is that first order pull bar and second level pull bar are united the sketch map (vertical view) that use gives a test of one's eyesight,
Fig. 3 is that the A of Fig. 2 is to view (front view of the present invention).
The specific embodiment
The specific embodiment one: combine Fig. 1～Fig. 3 that this embodiment is described; This embodiment comprises sighting target substrate 1, first order pull bar 2, second level pull bar 3 and frontal plate 4; The base portion of first order pull bar 2 is fixedly connected with sighting target substrate 1; Second level pull bar 3 is plugged in the first order pull bar 2, and the tail end of second level pull bar 3 is connected with frontal plate 4.
The specific embodiment two: combine Fig. 2 that this embodiment is described, the said frontal plate 4 of this embodiment is 250mm with the first order detection distance L of sighting target substrate 1 space of a whole page.It is 400mm that said frontal plate 4 detects apart from V with the second level of sighting target substrate 1 space of a whole page.Other are identical with the specific embodiment one.
Claims (3)
1. one kind with the near vision test type apart from positioning tie bar; Comprise sighting target substrate (1), first order pull bar (2), second level pull bar (3) and frontal plate (4); It is characterized in that; The base portion of first order pull bar (2) is fixedly connected with sighting target substrate (1), and second level pull bar (3) is plugged in the first order pull bar (2), and the tail end of second level pull bar (3) is connected with frontal plate (4).
2. according to claim 1 a kind ofly it is characterized in that with the near vision test type apart from positioning tie bar, it is 250mm that the first order of said frontal plate (4) and sighting target substrate (1) space of a whole page detects distance.
3. according to claim 1 a kind ofly it is characterized in that with the near vision test type apart from positioning tie bar, it is 400mm that said frontal plate (4) detects distance with the second level of sighting target substrate (1) space of a whole page.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102958089A CN102415871A (en) | 2010-09-28 | 2010-09-28 | Chart for near vision test with distance positioning draw bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102958089A CN102415871A (en) | 2010-09-28 | 2010-09-28 | Chart for near vision test with distance positioning draw bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102415871A true CN102415871A (en) | 2012-04-18 |
Family
ID=45940697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102958089A Pending CN102415871A (en) | 2010-09-28 | 2010-09-28 | Chart for near vision test with distance positioning draw bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102415871A (en) |
-
2010
- 2010-09-28 CN CN2010102958089A patent/CN102415871A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120418 |