CN211460157U

CN211460157U - Multifunctional visual chart for ophthalmology

Info

Publication number: CN211460157U
Application number: CN201922122057.XU
Authority: CN
Inventors: 陶梦璋; 李俊峰; 来东; 陈琴; 马婧一; 尹纯
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-09-11
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a visual chart, in particular to a multifunctional visual chart for ophthalmology, which comprises a visual board, wherein the visual board is arranged on a wall through a base at the rear part of the visual board, the two sides and the top of the vision plate are movably connected with shading frames, the base is provided with a through groove which is communicated with the front and the back, the transmission mechanism is arranged in the through groove, the utility model can ensure that the height of the vision plate can be adjusted adaptively when testing groups with obviously different heights, such as adults, children and the like, through the design of the height adjustable type of the vision plate, the precision of the vision test is ensured, meanwhile, the edge of the lamp is provided with a shading frame for shading light, so that the lamp can shade the light when the light is strong and cannot be seen clearly due to reflection when testing the eyesight, meanwhile, the shading frame rotates to enable the shading frame to be horizontally placed or supported, and selection can be performed according to actual light conditions.

Description

Multifunctional visual chart for ophthalmology

Technical Field

The utility model relates to an eye chart, especially an ophthalmic multi-functional eye chart.

Background

The eye chart is a chart for measuring vision. The domestic visual chart comprises: international standard visual acuity chart, logarithmic visual acuity chart, and landau circle visual acuity chart. The visual acuity chart and the distance visual acuity chart are functionally classified. The visual acuity chart is based on the principle of viewing angle. The inspection of vision is generally divided into far vision and near vision, the far vision mostly adopts an international standard visual chart which is composed of 14 lines of E characters with different sizes and different opening directions; measuring from 0.1 to 1.5 (or from 4.0 to 5.2); each line has a label, the normal line of the visual chart operation side of the detected person is parallel to one line of 1.0 and is 5 meters away from the visual chart, the visual chart in the prior art is generally directly pasted on a wall for testing by paper, but the reflective phenomenon can occur due to the fact that the visual chart is at the edge of a window or at the door during testing, and the height of the visual chart can also influence the measuring accuracy during testing children and adults.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at is through providing an ophthalmic multi-functional visual chart to the defect that the precision is not high when providing the test in solving above-mentioned background.

The utility model adopts the technical scheme as follows: including the vision board, the vision board is installed on the wall through the base at its rear the equal swing joint in both sides and the top of vision board has the shading frame, set up the logical groove that link up around having seted up on the base it is equipped with drive mechanism to lead to the inslot, the back of vision board is equipped with three fixed plate, lead to the inslot and be equipped with two vertical guide bars, the guide bar runs through the fixed plate that is located both sides and rather than sliding connection.

As an optimal technical solution of the utility model: the transmission mechanism comprises a rotating shaft horizontally arranged in the through groove and a lead screw vertically arranged in the through groove, the lead screw penetrates through a fixing plate in the middle and is in threaded connection with the fixing plate, a worm wheel is sleeved outside the lead screw, a worm is sleeved outside the rotating shaft, the worm wheel and the worm are meshed with each other, one end of the rotating shaft penetrates through the base and extends to the outside of the base, two ends of a rocker are connected with the outside of the rotating shaft and are rotatably connected with the base, and two ends of the lead screw are rotatably connected with the base.

As an optimal technical solution of the utility model: the shading frame comprises a U-shaped rod and shading cloth on the inner side of the U-shaped rod.

As an optimal technical solution of the utility model: two legs of the U-shaped rod are hinged with the outer wall of the vision plate through hinges.

As an optimal technical solution of the utility model: and a rubber ring is arranged at the hinged part of the U-shaped rod and the vision plate.

The utility model discloses a design of visual plate height-adjustable festival formula can guarantee can the adaptability adjust the height of visual plate when testing the colony of the obvious difference of height such as adult and children, guarantee the accurate nature of visual test, be provided with the shading frame that is used for the shading in its edge simultaneously, make can shelter from light when light is strong, can not see owing to the reflection of light unclear in testing visual, the rotatory messenger of shading frame simultaneously can keep flat or prop up, can select according to the light condition of reality.

Drawings

Fig. 1 is a schematic view of the overall structure of the preferred embodiment of the present invention (the light shielding frame in a standing state);

fig. 2 is a schematic view of the overall structure of the preferred embodiment of the present invention (the light shielding frame is in a flat state);

fig. 3 is an exploded view of a preferred embodiment of the present invention;

fig. 4 is a schematic back structure diagram of the preferred embodiment of the present invention;

fig. 5 is an enlarged schematic view of the structure at a in fig. 4 according to the preferred embodiment of the present invention.

The reference numbers illustrate:

the visual acuity test device comprises a base (1), a through groove (10), a vision plate (2), a fixing plate (20), a shading frame (3), a U-shaped rod (30), shading cloth (31), a transmission mechanism (4), a lead screw (40), a worm wheel (41), a rotating shaft (42), a worm (43), a rocker (44) and a guide rod (5).

Detailed Description

It should be noted that, in the present application, features of embodiments and embodiments can be combined with each other without conflict, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the preferred embodiment of the present invention provides a multifunctional visual chart for ophthalmology, which comprises a visual board 2, wherein the visual board 2 is provided with a plurality of rows of labels with "E" shapes having different sizes and different opening directions, the visual board 2 is mounted on a wall through a base 1 at the rear of the visual board 2, the visual board 2 and the base 1 are made of aluminum alloy, the visual board 2 and the base 1 are light and durable, the base 1 is fixed on the wall by expansion screws or double faced adhesive tapes, in the embodiment, double faced adhesive tapes are preferably adopted, both sides and the top of the visual board 2 are movably connected with a shading frame 3, the base 1 is provided with a through groove 10 which is through from front to back, a transmission mechanism 4 is arranged in the through groove 10, the back of the visual board 2 is provided with three fixing plates 20, the fixing plates 20 are welded and fixed with the visual board 2, the through groove 10, the guide bar 5 penetrates the fixing plate 20 at both sides and is slidably coupled thereto.

Specifically, the transmission mechanism 4 includes a rotating shaft 42 horizontally disposed in the through groove 10 and a lead screw 40 vertically disposed in the through groove 10, the lead screw 40 penetrates through the middle fixing plate 20 and is in threaded connection with the middle fixing plate 20, a worm wheel 41 is sleeved outside the lead screw 40, the lead screw 40 and the worm wheel 41 are fixed by screws, a worm 43 is sleeved outside the rotating shaft 42, the rotating shaft 42 and the worm 43 are fixed by screws, the worm wheel 41 and the worm 43 are engaged with each other, one end of the rotating shaft 42 passes through the base 1 and extends to the outside thereof, and a rocker 44 is connected to the outside thereof, the rotating shaft 42 and the worm 43 thereon are driven to rotate by shaking the rocker 44 by hand, so as to drive the worm wheel 41 engaged with the worm 43 to rotate, and further drive the lead screw 40 to rotate, when the lead screw 40 rotates, the lead screw is in threaded fit with the middle fixing plate 20, the rotary motion is converted into the linear motion, the vision plate 2 is driven to rise or fall to adjust the height.

Secondly, the two ends of the rotating shaft 42 are rotatably connected with the base 1, and the two ends of the screw 40 are rotatably connected with the base 1, so that the rotating shaft and the screw 40 can be stably rotated.

In addition, the shade frame 3 includes a U-shaped bar 30 and a shade cloth 31 inside the U-shaped bar 30. The two legs of the U-shaped rod 30 are hinged with the outer wall of the vision board 2 through hinges. Realize propping up or keeping flat shading frame 3 through rotating shading frame 3 to 2 levels and the vertically position with the eyesight board, select the shading frame 3 of which side to prop up according to the light position of reality, be equipped with the rubber circle in the articulated department of U-shaped pole 30 and eyesight board 2, increase the frictional force of its articulated department, make it rotate the back can stably keep in the optional position, played simple limiting displacement.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An ophthalmic multifunctional visual chart, comprising a vision plate (2), characterized in that: the utility model discloses a visual board, including visual board (2), base (1) through its rear install on the wall the equal swing joint in both sides and the top of visual board (2) has shading frame (3), logical groove (10) that link up around having seted up on base (1) be equipped with drive mechanism (4) in leading to groove (10), the back of visual board (2) is equipped with three fixed plate (20), be equipped with two vertical guide bar (5) in leading to groove (10), guide bar (5) run through be located both sides fixed plate (20) and rather than sliding connection.

2. An ophthalmic multifunctional eye chart according to claim 1, wherein: the transmission mechanism (4) comprises a rotating shaft (42) horizontally arranged in the through groove (10) and a lead screw (40) vertically arranged in the through groove (10), the lead screw (40) penetrates through the fixing plate (20) located in the middle and is in threaded connection with the fixing plate, a worm wheel (41) is sleeved outside the lead screw (40), a worm (43) is sleeved outside the rotating shaft (42), the worm wheel (41) and the worm (43) are meshed with each other, one end of the rotating shaft (42) penetrates through the base (1) and extends to the outside of the base, and a rocker (44) is connected to the outside of the rotating shaft.

3. An ophthalmic multifunctional eye chart according to claim 2, wherein: the both ends of pivot (42) with base (1) rotate to be connected, the both ends of lead screw (40) with base (1) rotate to be connected.

4. An ophthalmic multifunctional eye chart according to claim 1, wherein: the shading frame (3) comprises a U-shaped rod (30) and shading cloth (31) arranged on the inner side of the U-shaped rod (30).

5. An ophthalmic multifunctional eye chart according to claim 4, wherein: two feet of the U-shaped rod (30) are hinged with the outer wall of the vision plate (2) through hinges.

6. An ophthalmic multifunctional eye chart according to claim 5, wherein: a rubber ring is arranged at the hinged position of the U-shaped rod (30) and the vision plate (2).