CN201564466U - Rotating vision chart - Google Patents
Rotating vision chart Download PDFInfo
- Publication number
- CN201564466U CN201564466U CN2009202948836U CN200920294883U CN201564466U CN 201564466 U CN201564466 U CN 201564466U CN 2009202948836 U CN2009202948836 U CN 2009202948836U CN 200920294883 U CN200920294883 U CN 200920294883U CN 201564466 U CN201564466 U CN 201564466U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- visual acuity
- acuity chart
- self
- chart according
- 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.)
- Expired - Fee Related
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- Eye Examination Apparatus (AREA)
Abstract
The utility model discloses a rotating vision chart, which comprises a bracket, wherein the bracket is provided with a step-shaped rotating shaft; a turn plate which is provided with vision test signs is arranged on the step-shaped rotating shaft; a non-transparent circular cover is fixed at the end of the step-shaped rotating shaft; and the circular cove is provided with a fan-shaped test opening. When in use, the turn plate rotates around the rotating shaft, so that the test signs are different at every time, thereby completely eradicating the possibility of cheat and guaranteeing the fairness and the accuracy of the test. A self-lubricating bearing sleeve is fixed on the turn plate in an interference way, and the self-lubricating bearing sleeve is in clearance fit with the step-shaped rotating shaft, so that the rotating type vision chart plays a part in lubricating due to the self-lubricating bearing, can leads the rotation to be easier, and can prolong the service life of the turn plate and the step-shaped rotating shaft.
Description
Technical field:
This utility model relates to a kind of visual acuity chart, more specifically to a kind of revolving visual acuity chart.
Background technology:
Everybody has the experience of surveying vision, is to hang the standard brick visual acuity chart that unalterable similar wall calendar is the same at the dead ahead from the measured so all know the method for existing survey vision.Allow the measured say up and down with a certain distance from figure " E " word that varies in size towards, to identify measured's force grade.Because this standard visual acuity chart is unalterable,, therefore cause a lot of people to use the memory cheating in the test vision of oneself so be easy to be remembered by people.And many times be to need the real result of test vision effective, the personnel of soldier, pilot or special industry for example are so inaccurate eyesight testing result influence is very big.
The utility model content:
The purpose of this utility model is to provide a kind of rotation visual acuity chart at the deficiencies in the prior art part, and it has a rotating disk that is shaped on the eyesight testing symbol, can effectively prevent to test the generation of cheating.
Technology solution of the present utility model is as follows:
The rotation visual acuity chart comprises support, forms the ladder rotating shaft on the described support; The rotating disk that is shaped on the eyesight testing symbol is installed on the ladder rotating shaft, and described ladder rotating shaft end is fixed with opaque dome, has fan-shaped test port on the described dome.
Described rotation visual acuity chart, interference is fixed with the self-lubricating bearing cover on the described rotating disk; Described self-lubricating bearing cover and ladder rotating shaft matched in clearance.
Described rotation visual acuity chart is bolted with rotating handles on the described rotating disk.
Described rotation visual acuity chart, described rotating handles are four.
Become an angle of 90 degrees between the described rotation visual acuity chart, adjacent two of described rotating handles.
Described rotation visual acuity chart, described support bottom surface forms installing hole.
Described rotation visual acuity chart, described installing hole are two.
Described rotating disk is identical with the diameter of dome.
The beneficial effects of the utility model are:
1, the rotating disk that is shaped on the eyesight testing symbol is installed on the ladder rotating shaft, and described ladder rotating shaft end is fixed with opaque dome, has fan-shaped test port on the described dome.In the time of use rotating disk is rotated around rotating shaft, the symbol of feasible test is all different at every turn, has stopped the probability of cheating, and the justice that has guaranteed test is with accurate.
2, interference is fixed with the self-lubricating bearing cover on the described rotating disk; Described self-lubricating bearing cover and ladder rotating shaft matched in clearance because self-lubricating bearing has lubricated effect, not only can make rotation be more prone to, and can also increase the service life of rotating disk and ladder rotating shaft greatly.
Description of drawings
Fig. 1 is a front view of the present utility model;
Fig. 2 is the cutaway view of Fig. 1.
The fan-shaped test port 5-of 1-support 101-ladder rotating shaft 102-installing hole 103-female thread 2-rotating disk 201-female thread 3-self-lubricating bearing cover 4-dome 41-rotating handles 501-external screw thread 6-screw 7-gland
The specific embodiment
Embodiment sees accompanying drawing 1 ~ 2, and the rotation visual acuity chart comprises support 1, forms ladder rotating shaft 101 on the described support 1; The rotating disk 2 that is shaped on the eyesight testing symbol is installed on the ladder rotating shaft 101; Described ladder rotating shaft 101 ends are fixed with opaque dome 4; Have fan-shaped test port 41 on the described dome 4.The end of ladder rotating shaft 101 forms internal thread hole 103, and screw 6 passes gland 7 and is screwed onto in this internal thread hole 103, thereby dome 4 is fixed on the end of ladder rotating shaft 101.
Interference is fixed with self-lubricating bearing cover 3 on the described rotating disk 2; Described self-lubricating bearing cover 3 and ladder rotating shaft 101 matched in clearance.Certainly also roller bearing can be installed here, but cost is higher comparatively speaking, and the rotating speed of rotation here is not high, self-lubricating bearing can have been realized fully; Use roller bearing relatively to waste, so no matter be better from saving the Financial cost or the suitability or the self-lubricating bearing cover being installed, price is low, does not also need to safeguard.
Be bolted with rotating handles 5 on the described rotating disk 2.Form female thread 201 on the rotating disk 2, and an end of rotating handles 5 forms external screw thread 501, rotating handles 5 is fixed on the rotating disk 2 by being threaded.
Described rotating handles 5 is four.
Described rotating handles 5 becomes an angle of 90 degrees between adjacent two.
Described support 1 bottom surface forms installing hole 102.
Described installing hole 102 is two.
Described rotating disk 2 is identical with the diameter of dome 4.
Operation principle: in the time of needs test vision, rotate rotating disk 2 by rotating handles 5, make rotating disk 2 around 101 rotations of ladder rotating shaft, when rotating disk 2 stops, can observe " E " on the visual acuity chart by the fan-shaped test port 41 that has on the dome 4, just can test vision.Installing hole 102 on the support 1 can be fixed whole device when being necessary, prevents to produce in the use to rock.
Claims (8)
1. the rotation visual acuity chart comprises support (1), it is characterized in that: form ladder rotating shaft (101) on the described support (1); The rotating disk (2) that is shaped on the eyesight testing symbol is installed on the ladder rotating shaft (101); Described ladder rotating shaft (101) end is fixed with opaque dome (4); Have fan-shaped test port (41) on the described dome (4).
2. rotation visual acuity chart according to claim 1 is characterized in that: described rotating disk (2) is gone up interference and is fixed with self-lubricating bearing cover (3); Described self-lubricating bearing cover (3) and ladder rotating shaft (101) matched in clearance.
3. rotation visual acuity chart according to claim 1 is characterized in that: be bolted with rotating handles (5) on the described rotating disk (2).
4. rotation visual acuity chart according to claim 3 is characterized in that: described rotating handles (5) is four.
5. rotation visual acuity chart according to claim 4 is characterized in that: become an angle of 90 degrees between adjacent two of the described rotating handles (5).
6. rotation visual acuity chart according to claim 1 is characterized in that: described support (1) bottom surface forms installing hole (102).
7. rotation visual acuity chart according to claim 6 is characterized in that: described installing hole (102) is two.
8. rotation visual acuity chart according to claim 1 is characterized in that: described rotating disk (2) is identical with the diameter of dome (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948836U CN201564466U (en) | 2009-12-24 | 2009-12-24 | Rotating vision chart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948836U CN201564466U (en) | 2009-12-24 | 2009-12-24 | Rotating vision chart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201564466U true CN201564466U (en) | 2010-09-01 |
Family
ID=42656746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202948836U Expired - Fee Related CN201564466U (en) | 2009-12-24 | 2009-12-24 | Rotating vision chart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201564466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137111A (en) * | 2016-06-25 | 2016-11-23 | 利辛县眼病防治所 | A kind of anti-cheating visual acuity chart and using method thereof |
-
2009
- 2009-12-24 CN CN2009202948836U patent/CN201564466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137111A (en) * | 2016-06-25 | 2016-11-23 | 利辛县眼病防治所 | A kind of anti-cheating visual acuity chart and using method thereof |
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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: 20100901 Termination date: 20101224 |