Electronic vision examination table

Abstract

The utility model discloses an electronic visual acuity examination chart, which belongs to the technical field of visual acuity examination, and solves the problems that the existing device is inconvenient to update the opening position of a letter E on a visual acuity chart, a detected person is easy to recite the content of the visual acuity chart in advance, and the detection result is inaccurate. The letter updating device comprises a mounting frame, a letter updating assembly is arranged in the mounting frame, a supporting assembly is arranged at the bottom of the mounting frame, the letter updating assembly comprises updating rollers, a motor, a switch button and gears, the gears are driven by the motor to rotate, and all the updating rollers can be driven by the motor to periodically rotate through meshing of the adjacent gears. By arranging the observation windows on the rotating rollers, the lamp boxes on the different faces of the rotating rollers can be aligned with the observation windows respectively, then a detected person observes the orientation of letters E on the lamp boxes through the observation windows, the purpose of periodically replacing the lamp boxes appearing in the observation windows is achieved, and the problem that a detection result is inaccurate due to the fact that the detected person recits a visual chart in advance is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to visual detection technical field, concretely is an electronic visual examination table. BACKGROUND

[0002] Optotype is an important tool for detecting vision and assessing eye health, and checking vision is generally divided into two categories of distance vision and near vision, distance vision adopts international standard optotype, and the international standard optotype is printed with different size and opening direction of letter E, and the direction of letter E opening is used to detect vision.

[0003] Through the search, the application number of patent application is 202320528015.X, and a visual examination table is disclosed, which comprises an optotype, a lifting sleeve plate is installed on the rear surface of the optotype, a lifting frame is arranged in the lifting sleeve plate, clamping teeth are formed on the two sides of the lifting frame, a limiting sliding groove is formed on the rear surface of the lifting frame, a limiting sliding block is installed on the inner side wall of the lifting sleeve plate outside the limiting sliding groove, a clamping claw is arranged in the inside of the lifting sleeve plate outside the limiting sliding groove, and an elastic rotating shaft is connected between the clamping claw and the lifting sleeve plate.

[0004] Although the visual examination table moves in the inside of the lifting sleeve plate through the lifting frame, and then adjusts the position of the optotype, it is convenient to control the optotype for people of different heights to observe, but the opening position of the letter E on the optotype cannot be updated conveniently, and the detected personnel can easily recite the content of the optotype in advance, resulting in inaccurate detection result.

[0005] Therefore, we propose an electronic visual examination table. CONTENT OF UTILITY MODEL

[0006] In view of the defects of the prior art, the utility model provides an electronic visual examination table, which solves the problem that the prior art is inconvenient to update the opening position of the letter E on the optotype, and the detected personnel can easily recite the content of the optotype in advance, resulting in inaccurate detection result.

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme: an electronic visual examination table, comprising a mounting frame, a letter updating assembly is arranged in the inside of the mounting frame, and a supporting assembly is arranged at the bottom of the mounting frame.

[0008] The letter updating assembly comprises an updating roller, a motor, a switch button and gears, the updating roller is arranged in a linear array inside a mounting frame, gears are arranged at both ends of the updating roller, the gears are rotatably mounted on the inner wall of the mounting frame through bearing rings, adjacent gears are meshed with each other, the motor is fixedly mounted on the top end of the side wall of the mounting frame, and the output end of the motor is fixedly mounted on the middle part of the side wall of the gear at the topmost position through the side wall of the mounting frame.

[0009] The updating roller comprises a rotating roller and a lamp box, the rotating roller is in a multi-prism shape, the lamp box is fixedly mounted on each side surface of the rotating roller, and the surface of each lamp box is respectively printed with an open letter E facing different directions.

[0010] Preferably, the rotating roller is a hexagonal prism, and the lamp box and the motor are connected with the power supply through wires, wherein, by arranging the rotating roller as a hexagonal prism, the lamp boxes on the six sides can be aligned with the observation window in turn for visual acuity detection.

[0011] Preferably, the motor is a stepping motor, and a switch button connected with the motor is fixedly mounted on the middle part of the side wall of the mounting frame, wherein, by arranging the motor as a stepping motor, the gears and the updating roller can be rotated regularly by the motor, and the lamp boxes on different side surfaces of each rotating roller can be adjusted to be aligned with the observation window periodically by the meshing of adjacent gears.

[0012] Preferably, a baffle is fixedly mounted on the front side of the mounting frame, observation windows are arranged on the side wall of the baffle in a linear array and opposite to the positions of the updating rollers, the observation windows are of the same specification as the lamp boxes, and transparent glass is fixedly mounted on the inner wall of the observation windows, wherein, the lamp boxes at different positions can be distinguished through the observation windows.

[0013] Preferably, a back plate is detachably mounted on the back side of the mounting frame through bolts, wherein, the back plate can be detached to facilitate the maintenance of the letter updating assembly inside the mounting frame.

[0014] Preferably, the supporting assembly comprises a bottom plate, universal wheels, a vertical plate and a clamping plate, the vertical plate is fixedly mounted on the top surface of the bottom plate, the universal wheels are fixedly mounted on the bottom surface of the bottom plate at four corners, the clamping plate is fixedly mounted on the middle part of the back surface of the back plate, the back plate is in a "U" shape in appearance and in an "L" shape in cross section, and the top end of the vertical plate is clamped in the inside of the clamping plate, wherein, the electronic visual acuity chart can be moved conveniently through the universal wheels, the back plate can be connected with the supporting assembly through the vertical plate and the clamping plate, and then the mounting frame can be supported through the supporting assembly.

[0015] The electronic visual acuity chart has the following beneficial effects:

[0016] The electronic visual examination table is characterized in that: the motor drives the gear to rotate, the adjacent gears are arranged in meshing mode, the motor can drive all the update rollers to rotate periodically, so that the lamp boxes on different surfaces of the rollers are aligned with the observation window respectively, then the person to be detected observes the direction of the letter E on the lamp box through the observation window, the purpose of periodically replacing the lamp boxes appearing in the observation window is achieved, the situation that the testee recites the visual examination table in advance to cause inaccurate test results is avoided, and the problems that the existing device is inconvenient to update the opening position of the letter E on the visual examination table and the person to be detected is prone to recite the content of the visual examination table in advance to cause inaccurate test results are solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of the utility model;

[0018] Figure 2 It is a split structure schematic view of the utility model;

[0019] Figure 3 It is a split structure schematic view of the update roller and the gear of the utility model;

[0020] Figure 4 It is a rear view structure schematic view of the utility model.

[0021] In the drawing: 1, mounting frame; 11, baffle; 12, observation window; 13, back plate; 2, letter update assembly; 21, update roller; 211, rotating roller; 212, lamp box; 22, motor; 23, switch button; 24, gear; 3, support assembly; 31, bottom plate; 32, universal wheel; 33, vertical plate; 34, clamping plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment 1:

[0024] As Figures 1-4As shown: including the installation frame 1, the inside of installation frame 1 is provided with letter updating assembly 2, the bottom of installation frame 1 is provided with support assembly 3, letter updating assembly 2 includes updating roller 21, motor 22, switch button 23 and gear 24, updating roller 21 is arranged in linear array in the inside of installation frame 1, the both ends of updating roller 21 are provided with gear 24, gear 24 is rotatably installed on the inner wall of installation frame 1 through bearing ring, adjacent gear 24 is engaged with each other, the top of installation frame 1 side wall is fixedly installed with motor 22, the output end of motor 22 is fixedly installed in the middle of the side wall of the topmost gear 24 through the side wall of installation frame 1, updating roller 21 includes rotating roller 211 and lamp box 212, rotating roller 211 is in the shape of a polygonal prism, lamp box 212 is fixedly installed on each side of rotating roller 211, the surface of each lamp box 212 is respectively printed with letter E facing different directions, rotating roller 211 is a hexagonal prism, lamp box 212 and motor 22 are connected with power supply through wires, motor 22 is a stepper motor, the middle of installation frame 1 side wall is fixedly installed with switch button 23 connected with motor 22, the front side of installation frame 1 is fixedly installed with baffle 11, the side wall of baffle 11 is provided with observation window 12 in linear array distribution and opposite to updating roller 21, the specification of observation window 12 is same with lamp box 212, the inner wall of observation window 12 is fixedly installed with transparent glass, through motor 22 driving gear 24 to rotate, through the setting of adjacent gear 24 engagement, through motor 22 can drive all updating roller 21 to rotate periodically, in order to make each rotating roller 211 different surface lamp box 212 respectively align with observation window 12, then the tester observes the direction of letter E on lamp box 212 through observation window 12, achieves the purpose of periodically replacing lamp box 212 appearing in observation window 12, can avoid the situation that the test result is inaccurate caused by the testee reciting the visual acuity chart in advance;

[0025] Embodiment 2:

[0026] As shown in Figure 1 , 2 and 4: the rear side of installation frame 1 is detachably installed with back plate 13 through bolt, support assembly 3 includes bottom plate 31, universal wheel 32, vertical plate 33 and clamping plate 34, the top surface of bottom plate 31 is fixedly installed with vertical plate 33, the bottom surface of bottom plate 31 is fixedly installed with universal wheel 32 at four corners, clamping plate 34 is fixedly installed in the middle of the back of back plate 13, back plate 13 is in the shape of "U" and the cross section is in the shape of "L", the top end of vertical plate 33 is clamped in the inside of clamping plate 34, which is convenient for disassembling back plate 13 to overhaul letter updating assembly 2 in the inside of installation frame 1, through universal wheel 32, it is convenient to move the electronic visual acuity chart, through the setting of vertical plate 33 and clamping plate 34, it is convenient to connect back plate 13 with support assembly 3, and then support installation frame 1 through support assembly 3.

[0027] The working principle and use process of the utility model: the electronic visual examination table, when using, the electronic visual examination table is moved to the detection position through universal wheel 32, and the switch button 23 can be pressed to start motor 22, and then motor 22 drives gear 24 to rotate, through the setting of the meshing of adjacent gear 24, all the updating rollers 21 can be driven to rotate periodically through motor 22, so as to make the lamp box 212 on the different surfaces of each rotating roller 211 respectively align with the observation window 12, and then the person to be detected observes the direction of the letter E on the lamp box 212 through the observation window 12.

[0028] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An electronic eye examination chart, characterized by: The application relates to a letter updating device, which comprises a mounting frame (1) provided with a letter updating assembly (2) inside, and a supporting assembly (3) arranged at the bottom of the mounting frame (1). The letter updating assembly (2) comprises updating rollers (21), a motor (22), a switch button (23) and gears (24), the updating rollers (21) are arranged in a linear array inside the mounting frame (1), gears (24) are arranged at the two ends of the updating rollers (21), the gears (24) are rotatably arranged on the inner wall of the mounting frame (1) through bearing rings, the adjacent gears (24) are meshed with each other, the motor (22) is fixedly arranged at the top end of the side wall of the mounting frame (1), and the output end of the motor (22) is fixedly arranged at the middle part of the side wall of the gear (24) at the topmost position through the side wall of the mounting frame (1). The updating roller (21) comprises a rotating roller (211) and a lamp box (212), the rotating roller (211) is in a multi-prism shape, the lamp box (212) is fixedly arranged on each side surface of the rotating roller (211), and the surface of each lamp box (212) is respectively printed with an open letter E facing different directions.

2. An electronic eye test chart according to claim 1, wherein: The rotating roller (211) is a six-prism, and the lamp box (212) and the motor (22) are connected with a power supply through wires.

3. An electronic eye test chart according to claim 1, wherein: The motor (22) is a stepping motor, and the switch button (23) connected with the motor (22) is fixedly arranged at the middle part of the side wall of the mounting frame (1).

4. An electronic eye test chart according to claim 1, wherein: The mounting frame (1) is fixedly provided with a baffle (11) at the front side, the side wall of the baffle (11) is provided with observation windows (12) arranged in a linear array and corresponding to the positions of the updating rollers (21), the specifications of the observation windows (12) are the same as those of the lamp boxes (212), and transparent glass is fixedly arranged on the inner wall of the observation windows (12).

5. An electronic eye test chart according to claim 1, wherein: The mounting frame (1) is detachably provided with a back plate (13) at the rear side through bolts.

6. An electronic eye test chart according to claim 5, wherein: The supporting assembly (3) comprises a bottom plate (31), universal wheels (32), a vertical plate (33) and a clamping plate (34), the vertical plate (33) is fixedly arranged on the top surface of the bottom plate (31), the universal wheels (32) are fixedly arranged at the four corners of the bottom surface of the bottom plate (31), the clamping plate (34) is fixedly arranged at the middle part of the back surface of the back plate (13), the back plate (13) is in a "U" shape in appearance and in an "L" shape in section, and the top end of the vertical plate (33) is clamped in the inside of the clamping plate (34).

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