CN219250131U

CN219250131U - Visual acuity chart calibrating apparatus

Info

Publication number: CN219250131U
Application number: CN202320817193.4U
Authority: CN
Inventors: 耿忠; 徐凯峰; 王文双
Original assignee: Zibo Institute Of Metrology Technology
Current assignee: Zibo Institute Of Metrology Technology
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-06-27
Anticipated expiration: 2033-04-10

Abstract

The utility model discloses an eye chart calibrating device which comprises a bottom plate, wherein the middle part of the upper end of the bottom plate is connected with a box body. According to the visual acuity test chart calibrating apparatus, through the mutual matching of the connecting cylinder, the rotating rod, the threaded rod, the first conical gear, the second conical gear, the connecting rod, the threaded cylinder, the shell, the supporting plate, the moving rod, the sliding groove and the scales, the threaded rod can be driven to rotate through the first conical gear and the second conical gear, so that the threaded cylinder moves upwards, the shell is pushed to move with the visual acuity test chart, the moving rod can determine the position height of the visual acuity test chart, and visual acuity test is conducted on patients with different heights; through the mutually supporting of motor, lead screw, slider, connecting block, light, slide bar, movable block and the visual acuity chart body that set up, can be convenient for the light at the inside random removal of casing for the light can throw light on the position of visual acuity chart difference, is convenient for detect patient's eyesight.

Description

Visual acuity chart calibrating apparatus

Technical Field

The utility model relates to the field of vision testing, in particular to an eye chart calibrating device.

Background

The visual acuity chart is a chart for measuring eyesight, and the visual acuity chart used in China comprises: the international standard visual acuity chart, the logarithmic visual acuity chart and the Langerhans' ring visual acuity chart are functionally divided into a near visual acuity chart and a far visual acuity chart. The visual acuity test chart is formulated according to the visual angle principle, the checked vision is generally divided into far vision and near vision, the far vision is mostly the international standard visual acuity test chart, and the visual acuity test chart is composed of 14 rows of E-shaped characters with different opening directions; measuring from 0.1 to 1.5 (or from 4.0 to 5.2); each row is provided with a mark, the normal line of the visual acuity chart operating side of the tested person is parallel to one row of 1.0, and the distance between the normal line and the visual acuity chart is 5 meters; currently, the visual test is performed through an eye chart when the visual test passes.

Vision refers to the capability of retina to distinguish images, and the quality of vision is judged by the size of the capability of retina to distinguish images; many people can only have normal eyesight as long as the eyesight can reach more than 1.0, in fact, the eyesight of 1.0 can only indicate that part of the people have normal eyesight, and the standard of normal eyesight also comprises the following contents: central vision; peripheral vision; stereoscopic vision.

The prior vision test usually detects the vision through the visual acuity chart, but the prior ophthalmic hospital usually hangs the visual acuity chart on the wall surface directly, the height of the visual acuity chart is not easy to adjust, and each patient needs to look over the visual acuity chart with a slightly upward head or a slightly downward head in the vision test process, so that the vision test effect can be deviated, and the vision test effect is affected.

Therefore, it is necessary to provide an eye chart verification device to solve the above problems.

Disclosure of Invention

The utility model mainly aims to provide an eye chart calibrating device which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides an eyesight test chart calibrating device, includes the bottom plate, bottom plate upper end middle part is connected with the box, box upper end middle part is connected with the connecting cylinder, connecting cylinder inner wall lower extreme middle part is connected with the bull stick, the bull stick upper end is connected with the threaded rod, bull stick outside upper portion is connected with first conical gear, first conical gear one side lower part is connected with second conical gear, second conical gear middle part is connected with the connecting rod, connecting rod one end runs through and extends to connecting cylinder one side, threaded rod outside upper portion threaded connection has a screw thread section of thick bamboo, screw thread section of thick bamboo upper end runs through and extends to connecting cylinder upper end, screw thread section of thick bamboo upper end is connected with the casing, the casing both sides all are connected with the framework, one of them framework inner wall upper end middle part is connected with the motor, the motor output end is connected with the lead screw, sliding connection has the slider outside, slider one end runs through and extends to inside the casing, slider one side is connected with the connecting block, connecting block one side is connected with the light, another framework inner wall upper end and lower extreme middle part are connected with the slide bar, slide bar one side is connected with the casing one side and is connected with the measuring block, one side is connected with the middle part.

Preferably, the measuring assembly comprises a supporting plate, moving rods are connected to the upper portions of two sides of the two frame bodies, sliding grooves are formed in one side of the supporting plate, corresponding to the two moving rods, of the two moving rods, one end of each moving rod is located in the two sliding grooves to slide respectively, and scales are connected to the corresponding positions of the two sliding grooves on one side of the supporting plate.

Preferably, the two moving rods are arranged in an L-shaped structure, and the number of the moving rods and the number of the sliding grooves are two.

Preferably, the opening is formed in the position, corresponding to the visual chart body, of the shell, and the visual chart body is located in the opening.

Preferably, an opening is formed in the connecting cylinder corresponding to the threaded cylinder, and the threaded cylinder is located in the opening.

Preferably, one end of the connecting rod is connected with a rotating handle, and a rubber sleeve is sleeved outside the rotating handle.

Preferably, the two sides of the shell are provided with moving grooves corresponding to the sliding blocks and the moving blocks, and the sliding blocks and the moving blocks are respectively positioned in the two moving grooves to slide.

Preferably, universal wheels are uniformly connected to two sides of the lower end of the bottom plate, and the number of the universal wheels is four.

Advantageous effects

Compared with the prior art, the utility model provides an eye chart verification device, which has the following beneficial effects:

1. this visual acuity chart calibrating apparatus through the mutual cooperation of connecting cylinder, bull stick, threaded rod, first conical gear, second conical gear, connecting rod, screw thread section of thick bamboo, casing, backup pad, movable rod, spout and scale that set up, can drive the threaded rod through first conical gear and second conical gear and rotate for screw thread section of thick bamboo upwards moves, promotes the position of casing and visual acuity chart and removes, and the movable rod can confirm the position height of visual acuity chart, and the patient of the different heights of being convenient for carries out visual acuity verification.

2. This visual acuity chart calibrating apparatus through the motor, lead screw, slider, connecting block, light, slide bar, movable block and the mutually supporting of visual acuity chart body that set up, can be convenient for the light at the inside random removal of casing for the light can throw light on the position of visual acuity chart difference, is convenient for detect patient's eyesight.

3. This visual acuity chart calibrating installation through the mutual cooperation of bottom plate and the universal wheel that sets up, can be convenient for remove the position of visual acuity chart, has increased the convenience.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the installation structure of the screw of the present utility model;

fig. 4 is an enlarged schematic view of the structure of fig. 2 a according to the present utility model.

In the figure: 1. a bottom plate; 2. a case; 3. a connecting cylinder; 4. a rotating rod; 5. a threaded rod; 6. a first bevel gear; 7. a second bevel gear; 8. a connecting rod; 9. a thread cylinder; 10. a housing; 11. a frame; 12. a motor; 13. a screw rod; 14. a slide block; 15. a connecting block; 16. a lighting lamp; 17. a slide bar; 18. a moving block; 19. a support plate; 20. a moving rod; 21. a chute; 22. a scale; 23. an eye chart body; 24. and a universal wheel.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in figures 1-4, the visual chart verification device comprises a bottom plate 1, a box body 2 is connected to the middle part of the upper end of the bottom plate 1, a connecting cylinder 3 is connected to the middle part of the upper end of the box body 2, a rotating rod 4 is connected to the middle part of the lower end of the inner wall of the connecting cylinder 3, the threaded rod 5 is supported, the upper end of the rotating rod 4 is connected with the threaded rod 5, the upper part of the outer side of the rotating rod 4 is connected with a first conical gear 6, the lower part of one side of the first conical gear 6 is connected with a second conical gear 7, the middle part of the second conical gear 7 is connected with a connecting rod 8, the second conical gear 7 is driven to rotate, one end of the connecting rod 8 extends through one side of the connecting cylinder 3, a threaded cylinder 9 is connected with threads on the upper part of the outer side of the threaded rod 5, a casing 10 is pushed to move upwards, the upper end of the threaded cylinder 9 extends through the upper end of the connecting cylinder 3, the upper end of the threaded cylinder 9 is connected with a casing 10, both sides of the casing 10 are connected with a frame 11, the middle part of the upper end of the inner wall of one frame 11 is connected with a motor 12, the output end of the motor 12 is connected with a screw rod 13, a sliding block 14 is slidably connected on the outer side of the screw rod 13, one end of the sliding block 14 extends into the shell 10 in a penetrating way, one end of the sliding block 14 is connected with a connecting block 15, one side of the connecting block 15 is connected with a lighting lamp 16, the middle part of the upper end and the middle part of the lower end of the inner wall of the other frame 11 are connected with a sliding rod 17, the outer side of the sliding rod 17 is slidably connected with a moving block 18, the moving stability of the connecting block 15 is improved, one end of the moving block 18 extends into the shell 10 in a penetrating way, one side of the moving block 18 is connected with the middle part of one side of the connecting block 15, one side of the shell 10 is embedded with an eye chart body 23, the measuring assembly comprises a supporting plate 19, the upper parts of two sides of the two frames 11 are connected with moving rods 20, the spout 21 has been seted up to backup pad 19 one side correspondence two movable rods 20 department, two movable rods 20 one end is located two spouts 21 inside and slides respectively, backup pad 19 one side corresponds two spouts 21 department and is connected with scale 22, be convenient for measure the position of movable rod 20, two movable rods 20's shape is L type structure setting, the quantity of movable rod 20 and spout 21 is two sets of, the opening has been seted up to casing 10 correspondence visual chart body 23 department, visual chart body 23 is located the opening inside, the connecting cylinder 3 corresponds screw thread section of thick bamboo 9 department and has been seted up the opening, screw thread section of thick bamboo 9 is located the opening inside, connecting rod 8 one end is connected with the twist grip, drive connecting rod 8 and second bevel gear 7 rotate, the cover is equipped with the rubber sleeve outside the twist grip, the slider 14 has all been seted up to slider 14 and movable block 18 department in casing 10 both sides, slider 14 and movable block 18 are located two movable groove inside and slide respectively, bottom plate 1 lower extreme both sides evenly are connected with the universal wheel 24, the drive device moves, the quantity of universal wheel 24 is four sets.

It should be noted that, when the visual chart calibrating device is used, the pushing device drives the universal wheel 24 to rotate, so that the device moves, then the connecting rod 8 is rotated according to the height of a patient, the second bevel gear 7 is driven to rotate, the first bevel gear 6 and the rotating rod 4 are driven to rotate, the threaded rod 5 is driven to rotate, the threaded cylinder 9 moves upwards to push the shell 10 to move upwards, the height of the visual chart body 23 can be adjusted, the moving rod 20 slides in the sliding groove 21, the scale 22 adjusts the height of the moving rod 20, and during visual inspection, the motor 12 drives the screw rod 13 to rotate, so that the sliding block 14 drives the connecting block 15 and the illuminating lamp 16 to move, and the moving block 18 slides outside the sliding rod.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an eyesight test chart calibrating installation, includes bottom plate (1), its characterized in that: the utility model discloses a screw type electric motor, including bottom plate (1), connecting rod (8) one end runs through and extends to connecting cylinder (3) one side, threaded rod (5) outside upper portion threaded connection has screw barrel (9), screw barrel (9) upper end is connected with casing (10), casing (10) both sides all are connected with box (11), first conical gear (6) one side lower part connection has second conical gear (7), second conical gear (7) middle part connection has connecting rod (8), connecting rod (8) one end runs through and extends to connecting cylinder (3) one side, screw barrel (9) are connected with screw barrel (9) in screw barrel (5) outside upper portion threaded connection, screw barrel (9) upper end is connected with casing (10), casing (10) both sides all are connected with box (11), box (11) inner wall upper end middle part is connected with motor (12), motor (12) output end is connected with slider (13) one end (14) inside slider (14), slider (14) one end (14) are connected with slider (14), connecting block (15) one side is connected with light (16), another framework (11) inner wall upper end middle part is connected with slide bar (17) with the lower extreme middle part, slide bar (17) outside sliding connection has movable block (18), inside movable block (18) one end runs through and extends to casing (10), movable block (18) one side is connected with connecting block (15) one side middle part, bottom plate (1) upper end one side is connected with measuring assembly, casing (10) one side middle part inlays and is equipped with vision chart body (23).

2. An eye chart verification device as claimed in claim 1, wherein: the measuring assembly comprises a supporting plate (19), moving rods (20) are connected to the upper portions of two sides of the two frame bodies (11), sliding grooves (21) are formed in one side of the supporting plate (19) corresponding to the two moving rods (20), one ends of the two moving rods (20) are respectively located in the two sliding grooves (21) to slide, and scales (22) are connected to the side of the supporting plate (19) corresponding to the two sliding grooves (21).

3. An eye chart verification device as claimed in claim 2, wherein: the shape of the two moving rods (20) is in an L-shaped structure, and the number of the moving rods (20) and the number of the sliding grooves (21) are two.

4. An eye chart verification device as claimed in claim 1, wherein: an opening is formed in the position, corresponding to the visual acuity chart body (23), of the shell (10), and the visual acuity chart body (23) is located in the opening.

5. An eye chart verification device as claimed in claim 1, wherein: an opening is formed in the connecting cylinder (3) corresponding to the threaded cylinder (9), and the threaded cylinder (9) is located in the opening.

6. An eye chart verification device as claimed in claim 1, wherein: one end of the connecting rod (8) is connected with a rotating handle, and a rubber sleeve is sleeved outside the rotating handle.

7. An eye chart verification device as claimed in claim 1, wherein: the sliding grooves are formed in the positions, corresponding to the sliding blocks (14) and the moving blocks (18), on two sides of the shell (10), and the sliding blocks (14) and the moving blocks (18) are respectively located in the two moving grooves to slide.

8. An eye chart verification device as claimed in claim 1, wherein: universal wheels (24) are uniformly connected to two sides of the lower end of the bottom plate (1), and the number of the universal wheels (24) is four.