CN86208246U - Active eyesight examining device - Google Patents
Active eyesight examining device Download PDFInfo
- Publication number
- CN86208246U CN86208246U CN 86208246 CN86208246U CN86208246U CN 86208246 U CN86208246 U CN 86208246U CN 86208246 CN86208246 CN 86208246 CN 86208246 U CN86208246 U CN 86208246U CN 86208246 U CN86208246 U CN 86208246U
- Authority
- CN
- China
- Prior art keywords
- sighting target
- target symbol
- eyesight
- activity screen
- size
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- 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 - Lifetime
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Abstract
The utility model relates to an active eyesight examining device, which is able to produce signal and determine that an examined person has an eyesight value of an objective indicator in an eyesight examining process. The utility model comprises a transmitting and side steering, an optoelectronic system, an active view screen, a visual target charge number and a micromachine, excludes that using fixed eyesight chart to examine the eyesight is affected by spirit factor and uses nystagmus philosophy to examine the eyesight objectively, having obvious effects especially for the examination of children eyesight and simulated blindness eye. The utility model has the advantages of simple structure, convenient operation, examination accuracy, etc.
Description
This utility model belongs to the examination of visual acuity medical apparatus and instruments.
In daily clinical diagnosis, physical examination and scientific research, examination of visual acuity is a foundation with people's subjective sensation (subjective examination method) often, measures people's vision with fixed visual acuity chart.This algoscopy lacks objectivity, is difficult to obtain correct result, it is just more difficult particularly to measure for children ' s vision mensuration, physical examination and pseudo-blind hole, influenced by measured's spirit factors, and cause the generation appreciable error, have a strong impact on the accuracy of medical outcome.
The purpose of this utility model is exactly in order to address the above problem, and provides a kind of in the examination of visual acuity signal taking place; Can be accurately, objective reality, be convenient to control, show, trace the active checking optometric device of people's vision.
This utility model is the principle according to optokinetic nystagmus, (that is: producing nystagmus when the person under inspection sees moving target).Be subjected to the inspection eye with the moving target stimulation, make it produce nystagmus, distinguish the vision of being examined eye with situations such as nystagmus have or not.
This utility model is made up of motor, gear reduction drive mechanism, side steering, transmission cylinder, electro-optical system, sighting target symbol, activity screen etc., does not still have this kind mechanical driving device at present in the world.The size of sighting target symbol is footpath outside this device sighting target symbol by the breach of general c chart ad eundem sighting target, and goes out the similar multicolour pattern of part size according to same principle design, uses for checking children ' s vision.The size of sighting target symbol is by 1.5 millimeters to 45 millimeters, and quantity is printed on the activity screen more than 50.The activity screen is made by clear films, be rectangle, be contained in have gear drive, photoelectricity is controlled automatically and the unique texture that commutates on, the inspection of its symbol design, spacing, figure carrying material, the printing technology of selecting for use, machinery, automatically controlled structure and use and graphy method are initiative, motor deceleration device drive activity screen is rotated.Every the regular hour, in form, occur one from right to left or the sighting target symbol that moves from left to right.The person under inspection has certain distance apart from form, and during inspection, movable sighting target symbol moves to big conversion gradually from little, is subjected to the inspection eye thereby stimulate.When being subjected to the inspection eye even railway nystagmus to occur, then stop operating, consult sighting target symbol top then and promptly know the objective sight that is subjected to the inspection eye by the count that the sighting target size is converted into the objective sight sign size that is subjected to the inspection eye.Sighting target symbol Warning Mark shows the sighting target grade by electro-optical system control automatic reverse and number, and its class information output can be traced through the processing of other instruments.
During inspection, the person under inspection does not have the pathologic nystagmus, and the sighting target symbol does not move too fast or slow excessively, is as the criterion can differentiate the sighting target symbol.The sighting target symbol moves too fast, and the nystagmus number of times increases, and then can not produce nystagmus in the time can not distinguishing the sighting target symbol.Otherwise sighting target symbol translational speed is slow more, and the nystagmus number of times is few more, occurs a nystagmus that makes a motion occasionally when the slowest, so be difficult for observing.During inspection, the person under inspection should have certain distance apart from device, because nystagmus amplitude size has substantial connection with checking distance.Distance is near more, and the visual angle is big more, and amplitude is also big more.When the long period is observed certain sighting target symbol if desired, can before reversion, press reverser, make its repeated rotation.
After checking out a glance, look into another at the moment, the eyes closure is taken a momentary rest, or hands is placed on the person under inspection at the moment, make its eye can not see the sighting target symbol, treat to begin again when eyes do not have nystagmus to check,, cause check result to make a mistake in case trembling of leaving over when the nystagmus mistake of eye is last eye examination examined in the back.
This utility model more accurately, truly objectively for being subjected to inspection eye that signal is provided, and then measure the vision value of being examined eye, and easy to use.Be convenient to control, particularly very big effect arranged for children ' s vision mensuration and pseudo-blind hole mensuration.
Below with reference to accompanying drawing this utility model is described in further detail.
Fig. 1 is this device profile.
Fig. 2 is this device internal structure master, attached view.
With reference to Fig. 1,2, the device profile shelly that is rectangle is made by light sheet material, and dead ahead has form (4), and the examiner has with a certain distance from form (4).Daylight lamp in the opening device illuminates the sighting target symbol (3) on the activity screen of being made by transparent material (2) so that check.If this device also can be not according to daylight lamp at bright place.Start micromachine (11), be contained in the gear driven gear shaft (13) on the motor (11), rotate driven gear (15), (16), (19) and (9), gear (9) drives actuating cylinder (5) rotation, the activity screen (2) that is contained on actuating cylinder (5) and the passive tube (21) is rotated, thereby sighting target symbol (3) is moved, stimulate to be subjected to the inspection eye, make it produce uniform nystagmus.Push switch stops operating, and checks that the vision of being examined eye is just known in the position of the sighting target symbol (3) of this moment.By photoswitch (22), its sighting target symbol is delivered on the recording instrument with the sign grade, also know the vision of being examined eye.
Observe certain sighting target symbol (3) if desired for a long time, as long as actuating solenoid (18), under the manipulation of spring, be contained in two gears (19) on the shift fork (17), can make actuating cylinder (5) do inhour or clockwise direction rotation respectively, thereby the sighting target symbol (3) on the activity screen (2) is done forward moving backward, reaches the purpose of repeated observation.
Fig. 1,2 is exactly an embodiment of this device.
Gear is made by bakelite and pyrite.Actuating cylinder (5) and passive tube (21) one ends are fixing by bearing and bearing block (14), and the other end is fixing by jackscrew and nut (6).The rotating speed of actuating cylinder (5) is 120 rev/mins.Gear (9) is fixing by little axle (8), central shaft (20), shift fork (17), gear (10) are fixed together.(23) be the electric line plate.Total is installed in the outside and is rectangle, and dead ahead has the form (4) of observation, in the rectangle shell of being made by sheet iron.Whole parts are the plate combination, for avoiding vibration and noise, will guarantee reasonable clearance and mutual alignment during assembling.For alleviating parts weight, also available other the light-duty thin material of shell is made.
Claims (7)
1, a kind of active checking optometric device of forming by motor, gear reduction transmission and side steering, transmission cylinder, electro-optical system that signal takes place in examination of visual acuity, it is characterized in that: the activity screen of a transparent rotation is housed on the transmission cylinder, and being printed on this screen stimulates the sighting target symbol of being examined eye.
2, device according to claim 1 is characterized in that: the activity screen is made by transparent dacron membrane, and shape is rectangle.
3, device according to claim 1 is characterized in that: the external diameter size of sighting target symbol is the breach of general c chart ad eundem sighting target, how many differences of its size and black.
4, according to claim 1,3 described devices, it is characterized in that: the sighting target symbol is distributed with certain interval on the activity screen, and moves from left to right or from right to left every the regular hour.
5, according to claim 1,2 described devices, it is characterized in that: on the activity screen, the top of sighting target symbol is printed on by the sighting target symbol size and is converted into the objective sight value that is subjected to the inspection eye.
6, according to claim 1,2 described devices, it is characterized in that: be printed on the multicolour pattern sighting target symbol that varies in size on the activity screen.
7, according to claim 1,2 described devices, it is characterized in that: the Warning Mark of sighting target symbol shows the sighting target grade by electro-optical system control automatic reverse and number on the activity screen, and its class information output can be traced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86208246 CN86208246U (en) | 1986-10-24 | 1986-10-24 | Active eyesight examining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86208246 CN86208246U (en) | 1986-10-24 | 1986-10-24 | Active eyesight examining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86208246U true CN86208246U (en) | 1987-08-05 |
Family
ID=4810505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86208246 Expired - Lifetime CN86208246U (en) | 1986-10-24 | 1986-10-24 | Active eyesight examining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86208246U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236481A (en) * | 2019-07-05 | 2019-09-17 | 青岛大学 | A kind of eyesight verifying attachment |
| CN110313887A (en) * | 2019-07-05 | 2019-10-11 | 青岛大学 | A kind of isomery visual chart and the eyesight method of inspection |
-
1986
- 1986-10-24 CN CN 86208246 patent/CN86208246U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236481A (en) * | 2019-07-05 | 2019-09-17 | 青岛大学 | A kind of eyesight verifying attachment |
| CN110313887A (en) * | 2019-07-05 | 2019-10-11 | 青岛大学 | A kind of isomery visual chart and the eyesight method of inspection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |