CN2108513U

CN2108513U - Vision testing apparatus for myopia

Info

Publication number: CN2108513U
Application number: CN 91231190
Authority: CN
Inventors: 李银喜
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-17
Filing date: 1991-12-17
Publication date: 1992-07-01

Abstract

The utility model relates to a near vision testing apparatus. A panel [1] is fixed on a bracket of T-shaped structure, and a peepdoor [2] is arranged on the upper part of the panel [1]. A movable optotype box [3] is supported on the bracket, and the upper part of the movable optotypes box [3] is printed by a small-size standard near vision chart and a corresponding chart. The standard near vision chart faces just to the panel, the center of the peepdoor and the center of the optotype type area of the standard near vision chart on the optotype box are on the same line, and the corresponding chart is printed on the two sides of the optotype box [3]. Entire optotype which are arranged according to the standard near vision chart are printed on the corresponding chart, but the optotypes are only of one specification, and the size of the entire optotype is of any kind in the optotype of 4.5-4.0 rows of five-division notation. An electric lamp is arranged in the optotype box, and a metric scale is carved on the T-shaped long bar of the bracket for supporting the optotype box.

Description

Vision testing apparatus for myopia

This utility model relates to a kind of equipment for examining vision, particularly a kind of examination of near vision instrument.

Existing examination of near vision method is under nature or artificial lighting, determines distance between those who are investigated and the standard near vision chart with judge distance, checks near vision.Because the inaccuracy of judge distance and the transmutability of available light make check result inaccurate.Under the bigger situation of workload, the staff causes eyestrain easily after the little sighting target of watching attentively for a long time in the visual acuity chart, causes the detection error.

The purpose of this utility model is that a kind of examination of near vision device will be provided, and it can carry out the examination of visual acuity operation easily, and measuring distance is accurate, not influenced by ambient lighting, and the staff is difficult for producing asthenopia, suitable generaI investigation in enormous quantities.Also can be used for measuring near point.

Task of the present utility model is finished as follows: mainly be made up of T type support and sighting target box.On the T type structure stand that keeps flat, be fixed with panel, have peep-hole above, the support upper support the sighting target box, be printed on small-sized standard near vision chart and correspondence table above, standard near vision chart on the sighting target box is over against panel, the sighting target space of a whole page center of standard near vision chart is on a line on the center of peep-hole and the sighting target box, can see the standard near vision chart on the sighting target box the peep-hole from panel, electric light is housed in the box, the brightness that makes the standard near vision chart on the sighting target box have coincidence detection to require, correspondence table is imprinted on the both sides of sighting target box, be printed on the sighting target corresponding on the table with standard near vision chart, but size has only a kind of specification, can be in standard near vision chart chooses any one kind of them in the notation 4.5～4.0 in five minutes, is advisable so that the doctor watches.Be carved with the metric system scale on the support T type stock of supporting sighting target box, be used for determining the distance of sighting target box and panel.

This utility model utilizes the scale on the T type stock to determine to check distance, and is convenient and reliable; Have illuminating lamp in the sighting target box, the clear easy sight of sighting target is not subjected to environmental influence, and check result is accurate; The particular design of correspondence table also can come into plain view the little sighting target below 4.5 on the sighting target box, helps alleviating staff's asthenopia; The sighting target box can move within the specific limits, can be used for measuring near point.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Accompanying drawing 1 is a kind of concrete structure sketch map.

Accompanying drawing 2 is T type supporting structure sketch maps.

Accompanying drawing 3 is panel front figure.

Accompanying drawing 4 is sighting target box front elevations.

Accompanying drawing 5 is sighting target box left surface figure.

Accompanying drawing 6 is T type stock sectional drawings.

Describe the details and the working condition of the concrete examination of near vision instrument that proposes according to the present invention in detail below in conjunction with accompanying drawing.

Embodiment 1 double-deck T type support examination of near vision instrument

Referring to accompanying drawing, make double-deck T type support with timber, plastics, metal material etc., go up the fixing panel ［ 1 ］ made with timber, plastics, sheet metal of going up in up and down T type cross bar ［ 6 ］, ［ 7 ］, perhaps T type cross bar ［ 6 ］, ［ 7 ］ and Jiong type frame ［ 9 ］ are combined into behind the framework more fixedly top panel.Have peep-hole ［ 2 ］ on the panel ［ 1 ］, it is bar shaped, the ellipse and circular of semicircle that its shape has bar shaped, two ends, and width (diameter) is suitable with people's eye socket width, and the length in hole is less than the sighting target space of a whole page length of small-sized standard near vision chart.Support T type stock ［ 4 ］ upper support sighting target box ［ 3 ］, be printed on small-sized standard near vision chart and correspondence table above, standard near vision chart on the sighting target box ［ 3 ］ is over against panel ［ 1 ］, the center of peep-hole ［ 2 ］ and sighting target box ［ 3 ］ are gone up the sighting target space of a whole page center of standard near vision chart on a line, correspondence table is imprinted on 1 of sighting target box ［ 3 ］ or 2 sides, be printed on whole sighting targets of arranging by standard near vision chart on the table, but have only a kind of specification, size is any one in five fens notations, 4.5～4.0 row sighting targets.Sighting target box ［ 3 ］ selects for use sheet plastic to make, and certain transmittance is arranged, and bonnet can be opened, and lamp socket and electric light are housed above, the brightness that makes the standard near vision chart on the sighting target box ［ 3 ］ have coincidence detection to require.Support T type stock ［ 4 ］ length of supporting sighting target box ［ 3 ］ is greater than 30 centimetres, and the one side that makes progress is carved with the metric system scale, and scale label is 0 point with panel ［ 1 ］ plane.Two sides have chute ［ 10 ］, sighting target box ［ 3 ］ is fixed on the slide block ［ 11 ］, have on the slide block ［ 11 ］ and the corresponding sliding tenon ［ 12 ］ of T type stock ［ 4 ］ upper hopper chute ［ 10 ］ size, both engage rear slider ［ 11 ］ can go up slip at whole T type stock ［ 4 ］, and sighting target box ［ 3 ］ slides thereupon and can remain on the position that needs.Following T type cross bar ［ 7 ］ and T type quarter butt ［ 5 ］ are formed the bottom of instrument, make being placed on the desktop that inspection apparatus can be stable, are combined into stable support by pole ［ 8 ］ and T type stock ［ 4 ］.

Its working condition is such: somascope is placed on the work top, with the positive detection distance scale alignment that slides into regulation along T type stock ［ 4 ］ of sighting target box ［ 3 ］, open light, it is preceding to allow the detected person be sitting in panel ［ 1 ］, with simple eye from peep-hole ［ 2 ］ sighting target in the observation caliber near vision test type, when the staff indicates sighting target to the examinee, to less sighting target, as the sighting target below 4.5, can see lateral correspondence table, because sighting target is bigger, sees clearly easily, so can draw conclusion more accurately to examinee's vision.

Claims

1, a kind of examination of near vision instrument, be fixed with panel [1] on the T type structure stand that it is characterized in that keeping flat, have peep-hole [2] above, the support upper support sighting target box [3], be printed on small-sized standard near vision chart and correspondence table above, standard near vision chart on the sighting target box [3] is over against panel [1], the center of peep-hole [2] and sighting target box [3] are gone up the sighting target space of a whole page center of standard near vision chart on a line, electric light is housed in the box, the brightness coincidence detection requirement of the standard near vision chart on the sighting target box [3] is carved with the metric system scale on the support T type stock [4] of supporting sighting target box [3].

2,, it is characterized in that T type structure stand is by T type cross bar ［ 6 ］, ［ 7 ］ and T type stock ［ 4 ］, T type quarter butt ［ 5 ］ and pole ［ 8 ］ are formed up and down by the described examination of near vision instrument of claim 1.

3,, it is characterized in that T type structure stand is by T type cross bar ［ 6 ］, ［ 7 ］ and T type stock ［ 4 ］, T type quarter butt ［ 5 ］, pole ［ 8 ］ and Jiong type frame ［ 9 ］ are formed up and down by the described examination of near vision instrument of claim 1.

4, by claim 1,2,3 described examination of near vision instrument, it is characterized in that T type stock ［ 4 ］ length greater than 30 centimetres, has chute ［ 10 ］ on the two sides.

5, by claim 1,2,3 described examination of near vision instrument, it is bar shaped, the ellipse and circular of semicircle that the shape that it is characterized in that peep-hole ［ 2 ］ has bar shaped, two ends, width (diameter) is suitable with people's eye socket width, and the length in hole is less than sighting target space of a whole page length.

6, by the described examination of near vision instrument of claim 4, it is characterized in that sighting target box ［ 3 ］ is fixed on the slide block ［ 11 ］, have on the slide block ［ 11 ］ and the corresponding sliding tenon ［ 12 ］ of T type stock ［ 4 ］ upper hopper chute ［ 10 ］ size, the sliding scale of slide block ［ 11 ］ is a whole T type stock ［ 4 ］.

7, by the described examination of near vision instrument of claim 1, it is characterized in that the scale label on the T type stock ［ 4 ］ is 0 point with panel ［ 1 ］ plane.

8, by the described examination of near vision instrument of claim 1, it is characterized in that correspondence table is imprinted on 1 of sighting target box ［ 3 ］ or 2 sides, be printed on whole sighting targets of arranging by standard near vision chart on the table, but have only a kind of specification, size is any one in five fens notation 4.5～4.0 row sighting targets.