A multifunctional remote-controlled ophthalmic vision chart

Abstract

The present application relates to the technical field of vision charts, and in particular to a multifunctional remote-controlled ophthalmic vision chart, comprising a supporting tube, a connecting tube is arranged on one side of the supporting tube, a turntable is arranged on one end of the supporting tube, a perspective window is arranged on the turntable, a rotating ring is arranged for rotation in the supporting tube, a connecting disk is arranged for rotation in the rotating ring, a plurality of columns connected to the connecting tube are arranged on the connecting disk, and a vision detector is arranged on the rotating ring; during the random rotation process of the test characters of the present invention, only the perspective window can be observed, and the rotation process of the test characters is not visible, which eliminates the possibility of patients guessing the direction of the sight mark by memorizing the rotation mode, thereby improving the objectivity and accuracy of the test, and at the same time, the tester does not need to pay attention to the rotation process, but can focus more on the test itself, which helps to reduce the psychological pressure during the test and improve the comfort of the test.

Description

Technical Field

[0001] The present application relates to the technical field of eye charts, and in particular to a multifunctional remote-controlled ophthalmic eye chart. Background Art

[0002] An ophthalmic eye chart is a standardized tool used to assess an individual's visual acuity. It contains a series of symbols of varying sizes, such as letters, numbers, or graphics, arranged in a specific logarithmic scale to facilitate accurate measurement of visual acuity. Traditional eye charts, such as the Snellen chart, assess visual acuity by asking the patient to identify these symbols at a certain distance. The design of the eye chart allows doctors or optometrists to record and compare patients' visual acuity levels in a standardized way.

[0003] Existing remote-controlled ophthalmic eye charts add the function of remote control operation based on traditional eye charts, making vision testing more flexible and convenient. These devices are usually equipped with a remote control that allows doctors to adjust test parameters such as symbol size, test distance and lighting conditions without touching the eye chart.

[0004] For example, a remote-controlled adjustable eye chart with publication number CN104739362B relates to the field of new energy technologies for vehicles. The prior art includes a box body formed by connecting an outer shell and a panel, a bottom plate and a guide plate are arranged in parallel in the box body, a sight mark rotation system is arranged between the bottom plate and the guide plate, a control circuit board for controlling the sight mark rotation system is fixedly arranged on the guide plate, the sight mark rotation system includes a motor fixedly arranged on the bottom plate, a rotating sleeve transmission-connected to the motor, a lampshade fixed to the rotating sleeve, and a sight mark fixed at one end of the lampshade, a lamp holder is arranged in the lampshade, and a group of LED bulbs are fixedly arranged on the lamp holder.

[0005] However, the above existing technologies still have some defects when testing ophthalmic vision charts:

[0006] 1. In the above-mentioned prior art, the process of random rotation of the sight mark is visible, which means that the patient or tester can see the entire process of the sight mark rotation. Since the rotation process is visible, the patient may remember the rotation pattern or sequence, and use this information to guess or remember the direction of the sight mark during the test, which will reduce the objectivity and accuracy of the test.

[0007] 2. In the above-mentioned prior art, the process of random rotation of the sight mark is visible. For some patients, knowing that the rotation process is visible may increase their psychological pressure because they may feel the need to remember the rotation pattern, which may affect their test performance.

[0008] Based on this, and according to the above-mentioned viewpoints, there is still room for improvement in the existing technology for ophthalmic vision test methods. Summary of the invention

[0009] In order to solve the above technical problems, the present application provides a multifunctional remote-controlled ophthalmic vision chart, which adopts the following technical solutions:

[0010] A multifunctional remote-controlled ophthalmic vision chart comprises a supporting tube, a connecting tube is arranged on one side of the supporting tube, a rotating disk is arranged on one end of the supporting tube, a perspective window is arranged on the rotating disk, a rotating ring is rotatably arranged inside the supporting tube, a connecting disk is rotatably arranged inside the rotating ring, a plurality of columns connected to the connecting tube are arranged on the connecting disk, and a vision detector is arranged on the rotating ring.

[0011] The vision detector comprises a sliding ring slidably arranged in a supporting tube and located between a rotating disk and a connecting disk, a supporting disk is rotatably arranged in the sliding ring, and a plurality of circumferentially uniform test characters are rotatably arranged on the supporting disk.

[0012] The vision detector also includes a connecting rod, and a connecting rod corresponding to the test characters is rotatably and slidably penetrated on the rotating ring, one end of the connecting rod is rotated through the supporting plate and connected to the test character, and a connecting gear slidably connected to the connecting rod is rotatably provided on the rotating ring.

[0013] A matching piece is arranged on the rotating ring; the matching piece comprises an inner ring rotatably arranged on the rotating ring and located inside a plurality of connecting rods, a connecting bracket connected to the inner ring is arranged on the column, and at least one arc-shaped rack meshing with a connecting gear is arranged on the outer side of the inner ring.

[0014] An outer gear ring located outside a plurality of connecting rods is rotatably arranged on the rotating ring, a driven gear meshing with the outer gear ring is arranged on the rotating ring, and an inner gear ring meshing with the driven gear is arranged inside the supporting cylinder.

[0015] At least one arc-shaped rack 2 meshing with the connecting gear is arranged on the inner side of the outer gear ring.

[0016] The support tube is provided with a sight gauge; the sight gauge comprises a sliding hole provided on the support tube, a sliding block connected to a sliding ring is slidably provided in the sliding hole, a driving shaft is rotatably provided on the support tube through a bracket, and a threaded groove is provided on the driving shaft.

[0017] A connecting hole is provided on the supporting cylinder and is located on one side of the sliding hole. An adjusting gear is provided on the driving shaft and is located in the connecting hole. An arc-shaped tooth segment meshing with the adjusting gear is provided on the outer ring of the rotating ring.

[0018] Preferably, a resistance hole is provided on the sliding block, a resistance rod is slidably arranged in the resistance hole and is in resistance with the thread groove, a limiting ring is arranged on the resistance rod, and a resistance spring is arranged between the upper end of the limiting ring and the resistance hole.

[0019] Preferably, a return spring is provided between the sliding ring and the supporting disk.

[0020] Preferably, the interference rod is provided with a threaded section which is threadably connected to the sliding block.

[0021] Preferably, a driving member is provided on the connecting disk; the driving member comprises a driving gear rotatably provided on the connecting disk, and a driving gear ring meshing with the driving gear is provided on the rotating ring.

[0022] Preferably, a transmission shaft connected to the turntable is rotatably provided on the connecting disk, and the turntable is rotatably connected to the supporting tube, and a transmission gear meshing with the driving gear is provided on the transmission shaft.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. During the random rotation process, the test characters of the present invention can only be observed in the perspective window, and the rotation process of the test characters is invisible, which eliminates the possibility of patients guessing the direction of the sight mark by memorizing the rotation pattern, thereby improving the objectivity and accuracy of the test. At the same time, the tester does not need to pay attention to the rotation process and can focus more on the test itself, which helps to reduce the psychological pressure during the test and improve the comfort of the test.

[0025] 2. When the vision detector of the present invention is working, each rotation of the rotating ring will drive the vision detector to generate a test pattern in a random direction, and then display the random test characters in a perspective window set on the turntable. The patient's vision is evaluated by observing the direction of the test pattern in the perspective window. By randomly displaying the test characters, it can effectively avoid the patient's early recognition of the test pattern due to the memory effect, thereby improving the objectivity and accuracy of the vision test.

[0026] 3. The present invention ensures that each test is independent by randomly displaying test characters, which reduces the possibility that the test results are affected by the previous test, making the test results more reliable. At the same time, due to the randomness of the test characters, human intervention in the test process can be reduced, making the test process more automated, thereby improving the overall test efficiency.

[0027] 4. The transmission shaft of the present invention will drive the turntable connected thereto to rotate together, and the rotation direction of the turntable is opposite to that of the rotating ring, and the perspective window on the turntable will rotate accordingly. After the driving motor stops, the perspective window on the turntable will randomly capture a test character in a random direction, thereby helping to further improve the patient's cooperation during the test and the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a three-dimensional cross-sectional view of the present invention.

[0030] Figure 3 It is a cross-sectional view of the vision detector of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the vision detector of the present invention.

[0032] Figure 5 It is a schematic structural diagram of the matching part of the present invention.

[0033] Figure 6 The present invention Figure 5 A partial enlarged view of point A.

[0034] Figure 7 It is a plan view of the matching part of the present invention.

[0035] Figure 8 It is a structural schematic diagram of the vision device of the present invention.

[0036] Fig. 9 It is a cross-sectional view of the diopter of the present invention.

[0037] Fig.10 It is a schematic structural diagram of the driving member of the present invention.

[0038] Fig.11 The present invention Fig.10 A partial enlarged view of point B.

[0039] Explanation of the reference numerals: 1. Support cylinder; 2. Connecting cylinder; 3. Turntable; 31. Perspective window; 4. Rotating ring; 5. Connecting disk; 51. Column; 6. Vision detector; 61. Sliding ring; 62. Support disk; 63. Test character; 64. Connecting rod; 65. Connecting gear; 7. Matching piece; 71. Inner ring; 72. Connecting bracket; 73. Arc rack 1; 74. Outer gear ring; 75. Driven gear; 76. Inner gear ring; 77. Arc rack 2; 8. sight gauge; 81. sliding hole; 82. sliding block; 83. driving shaft; 831. threaded groove; 84. interference hole; 85. interference rod; 851. limiting ring; 852. threaded segment; 86. interference spring; 87. return spring; 88. connecting hole; 881. adjusting gear; 89. arc-shaped tooth segment; 9. driving member; 91. driving gear; 92. driving gear ring; 93. driving motor; 94. transmission shaft; 95. transmission gear. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 11 This application is described in further detail.

[0041] The embodiment of the present application discloses a multifunctional remote-controlled ophthalmic vision chart, which gradually changes the direction, size and viewing distance of a test pattern until the patient cannot distinguish the direction of the test pattern. At this time, the recorded degree is the patient's vision degree.

[0042] Embodiment 1:

[0043] Reference Figures 1 to 3 A multifunctional remote-controlled ophthalmic vision chart includes a support tube 1, a connecting tube 2 is arranged on one side of the support tube 1, a turntable 3 is arranged at one end of the support tube 1, a rotating ring 4 coaxial with the support tube 1 is rotatably arranged in the support tube 1, and a connecting disk 5 coaxial with the support tube 1 is rotatably arranged in the rotating ring 4.

[0044] When measuring the patient's vision, first have the patient stand in front of the eye chart at the standard testing distance to ensure that the eye chart is clearly visible. This distance is usually 6 meters (20 feet), but it can also be adjusted according to the design of the eye chart and needs. Then use an eye patch or cover one of the patient's eyes with your hand to avoid interference between the two eyes.

[0045] Afterwards, the operator can remotely operate to start the driving member 9 set on the connecting disk 5, and the driving member 9 will drive the rotating ring 4 coaxial with the supporting tube 1 to rotate a certain angle; and since a number of columns 51 connected to the connecting tube 2 are provided on the connecting disk 5, the columns 51 will support the connecting disk 5 to ensure that the connecting disk 5 does not rotate; each rotation of the rotating ring 4 will drive the vision detector 6 set on the rotating ring 4 to work.

[0046] When the vision detector 6 is working, each rotation of the rotating ring 4 will drive the vision detector 6 to generate a test pattern in a random direction, and then display the random test pattern in the perspective window 31 set on the turntable 3. The perspective window 31 allows light to pass through, so that the patient can clearly see the displayed test pattern. The patient's vision is evaluated by observing the direction of the test pattern in the perspective window 31.

[0047] At the same time, each time the test pattern of random direction is switched, the ophthalmometer 8 arranged on the support tube 1 will change the visual distance between the test pattern and the patient to adjust the size of the test pattern seen by the patient in the perspective window 31, so as to test the patient's vision. Until the patient can no longer distinguish the direction of the test pattern, the degree recorded by the ophthalmometer 8 is the patient's vision.

[0048] During the test, the ophthalmometer 8 will gradually change the size and viewing distance of the test pattern until the patient cannot distinguish the direction of the test pattern. At this time, the degree recorded by the ophthalmometer 8 is the patient's vision degree, which reflects how many degrees of corrective lenses the patient needs to achieve optimal vision.

[0049] Reference Figure 4 , Figure 5 , Figure 6 and Figure 7 Specifically, the vision detector 6 includes a sliding ring 61 slidably arranged in the support tube 1 and located between the turntable 3 and the connecting disk 5. A support disk 62 coaxial with the support tube 1 is rotatably arranged in the sliding ring 61, and a plurality of circumferentially uniform test characters 63 are rotatably arranged on the support disk 62.

[0050] When the driving member 9 drives the rotating ring 4 to rotate a certain angle, the rotating ring 4 will drive the connecting rod 64 on the rotating ring 4 to rotate and slide through and correspond to the test characters 63 one by one, so that the connecting rod 64 revolves around the axis of the rotating ring 4 and rotates together with the rotating ring 4; at the same time, the rotating ring 4 will drive the matching member 7 set on the rotating ring 4 to work, and the matching member 7 will drive the connecting gear 65 rotatably set on the rotating ring 4 to rotate, and the connecting gear 65 will be slidably connected with the connecting rod 64 to drive the connecting rod 64 to rotate together.

[0051] Since one end of the connecting rod 64 rotates through the support plate 62 and is connected to the test character 63, a number of connecting rods 64 will drive the support plate 62 coaxial with the support tube 1 to rotate together, and the connecting rod 64 will also drive the test character 63 to rotate together, so that the test character 63 adapts to the rotation angle of the rotation, and adapts to the rotation angle of the rotating ring 4 by self-rotation, so that the test character 63 produces one or more 90-degree rotations relative to the previous workstation.

[0052] Until the rotating ring 4 stops rotating, one of the test characters 63 will stop in the perspective window 31 set on the turntable 3, and the test character 63 stopped in the perspective window 31 is a random one, or one or more 90-degree rotations are generated during the rotation process. At the same time, the ophthalmometer 8 set on the support tube 1 will drive the sliding ring 61 to move a certain distance into the support tube 1, and the sliding ring 61 will drive the support plate 62 to move into the support tube 1 together. The support plate 62 will move the connecting rod 64 into the support tube 1 and drive the test character 63, so that the test character 63 moves a certain distance into the support tube 1, thereby changing the visual distance between the test pattern and the patient to adjust the size of the test pattern in the perspective window 31 seen by the patient, so as to test the patient's eyesight, and thus complete a vision test.

[0053] The process of vision testing is repeated for many times until the patient cannot distinguish the direction of the test pattern. The degree recorded by the ophthalmometer 8 is the patient's vision degree.

[0054] It should be noted that the test character 63 usually adopts an "E"-shaped pattern, which is based on the design of the Snellen Chart. The Snellen Chart is a vision testing tool widely used around the world. It consists of a series of letters of different sizes, and the size of each letter is about 1.25 times the size of the previous letter. This design allows the visual acuity to be measured logarithmically, that is, the reciprocal of the visual acuity, so that the visual acuity level can be accurately assessed.

[0055] The "E" shaped pattern is one of the standardized symbols used in the Snellen eye chart for testing vision. It is designed to have different directions (up, down, left, right), and patients need to identify these directions to test their vision. This design allows for more flexible and personalized vision testing because the randomly generated test patterns can provide each patient with an independent test sequence, thereby reducing memory effects and bias in test results.

[0056] In the vision detector 6, using the "E" shaped pattern as the test character 63 can ensure the consistency and standardization of the test, making the vision test results between different patients comparable. In addition, due to the simplicity and recognizability of the "E" shaped pattern, it is suitable for patients of various ages and vision levels, including children and visually impaired people.

[0057] When performing the vision test, the operator will select an appropriate test line based on the patient's vision level and ask the patient to identify the direction of the "E"-shaped pattern. As the test progresses, the operator will gradually increase the size of the test character 63 until the patient cannot correctly identify it. In this way, the patient's vision level can be accurately assessed and appropriate correction suggestions can be provided to the patient.

[0058] Continue to refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , wherein the matching part 7 includes an inner ring 71 rotatably arranged on the rotating ring 4 and located inside a plurality of connecting rods 64, and a connecting bracket 72 connected to the inner ring 71 is arranged on the column 51. When the turntable 3 rotates, the inner ring 71 will remain stationary with the support plate 62 under the support of the connecting bracket 72, and when the rotating ring 4 rotates, the inner ring 71 rotates relative to the rotating ring 4.

[0059] When the rotating ring 4 drives the connecting rod 64 to rotate around the axis of the rotating ring 4, the connecting gear 65 will rotate around the axis of the rotating ring 4 together. During the rotation of the connecting gear 65, the connecting gear 65 will engage with at least one arc-shaped rack 73 provided on the outer side of the inner ring 71. Since the inner ring 71 will remain stationary with the support plate 62 under the support of the connecting bracket 72, the arc-shaped rack 73 will force the connecting gear 65 to rotate a certain angle.

[0060] The rotation of the rotating ring 4 is thereby converted into the rotation of the connecting rod 64, ensuring that the rotation of the rotating ring 4 can accurately control the rotation angle and direction of the connecting rod 64, so that the connecting rod 64 drives the test character 63 to rotate to adapt to the rotation angle of the rotating ring 4, and makes the test character 63 rotate one or more 90 degrees relative to the previous workstation to change the orientation of the test character 63.

[0061] An outer gear ring 74 located on the outside of a plurality of connecting rods 64 is rotatably provided on the rotating ring 4. When the rotating ring 4 drives the connecting rods 64 to rotate around the axis of the rotating ring 4, the driven gear 75 provided on the rotating ring 4 will rotate around the axis of the rotating ring 4 together, and the driven gear 75 will generate self-rotation through meshing with the outer gear ring 74; the self-rotating driven gear 75 will drive the inner gear ring 76 provided on the inner side of the supporting tube 1 to rotate through meshing, and the rotating inner gear ring 76 will drive at least one arc-shaped rack 77 provided on the inner side of the outer gear ring 74 to rotate together.

[0062] The rotating arc-shaped rack 2 77 will mesh with the connecting gear 65, forcing the connecting gear 65 to rotate a certain angle, ensuring that the rotation of the rotating ring 4 can accurately control the rotation angle and direction of the connecting rod 64, so that the connecting rod 64 drives the test character 63 to rotate to adapt to the rotation angle of the rotating ring 4, and makes the test character 63 rotate one or more 90 degrees relative to the previous workstation to change the orientation of the test character 63.

[0063] The arc rack 1 73 and the arc rack 2 77 force the connecting gear 65 to rotate, so that the connecting rod 64 drives the rotating test character 63 to produce one or more 90-degree rotations, so that each time the turntable 3 rotates a certain angle, the test character 63 will rotate at a random angle to change the direction of the test character 63.

[0064] Reference Figure 8 and Fig. 9 Specifically, the optometer 8 includes a sliding hole 81 opened on the supporting tube 1, and a sliding block 82 connected to the sliding ring 61 is slidably arranged in the sliding hole 81.

[0065] When the rotating ring 4 drives the connecting rod 64 to rotate around the axis of the rotating ring 4, the existing motor driving technology drives the driving shaft 83 on the supporting tube 1 to rotate through the bracket. The driving shaft 83 is provided with a threaded groove 831, and the sliding block 82 is provided with a resistance hole 84.

[0066] The rotating driving shaft 83 will slide in the interference hole 84 through the interference rod 85 that is rotatably set to interfere with the threaded groove 831, so that the sliding block 82 moves in the sliding hole 81, and the sliding block 82 will drive the sliding ring 61 to move together through the connection with the sliding ring 61, and the sliding ring 61 will drive the support plate 62 to move into the support tube 1 together, and the support plate 62 will move the connecting rod 64 into the support tube 1 and drive the test character 63, so that the test character 63 moves a certain distance into the support tube 1, thereby changing the visual distance between the test pattern and the patient, and adjusting the size of the test pattern in the perspective window 31 seen by the patient, so as to test the patient's eyesight, and thus complete a vision test.

[0067] A limit ring 851 is provided on the resistance rod 85, and a resistance spring 86 is provided between the upper end of the limit ring 851 and the resistance hole 84. The resistance spring 86 provides a stable reaction force to ensure that the movement of the sliding block 82 in the sliding hole 81 is smooth and controlled. The limit ring 851 is used to limit the movement range of the sliding block 82 to prevent it from exceeding the predetermined adjustment range.

[0068] During this process, the return spring 87 disposed between the sliding ring 61 and the supporting plate 62 will be compressed as the sliding ring 61 moves.

[0069] After repeating the vision test process for many times until the patient can no longer distinguish the direction of the test pattern, the degree recorded by the ophthalmometer 8 is the patient's vision degree. Then, the interference rod 85 is pulled to compress the interference spring 86, so that the interference rod 85 is out of contact with the thread groove 831, and then the interference rod 85 is fixed by the threaded section 852 provided on the interference rod 85 and threadedly connected to the sliding block 82, so that the interference rod 85 is always out of contact with the thread groove 831.

[0070] At this time, the compressed reset spring 87 will push the sliding ring 61 to return to its initial state, and the sliding ring 61 will drive the sliding block 82 connected to it to reset together. The sliding ring 61 will also drive the support plate 62 to move together, and the support plate 62 will cause the connecting rod 64 to move into the support tube 1 and drive the test character 63, so that the test character 63 moves outside the support tube 1 to the closest viewing distance to the patient, so as to perform a vision test on the patient's other eye or the next patient.

[0071] After the sliding block 82 is reset, the resistance rod 85 is rotated, the threaded section 852 and the sliding block 82 are disengaged from the threaded connection, and then the resistance spring 86 pushes the resistance rod 85 through the limiting ring 851, so that the resistance rod 85 is in conflict with the thread groove 831, so that when the driving shaft 83 rotates next time, the thread groove 831 and the resistance rod 85 can cooperate to drive the sliding block 82 to move in the sliding hole 81.

[0072] Reference Fig.10 and Fig.11, wherein the driving member 9 includes a driving gear 91 rotatably arranged on the connecting disk 5. When measuring the patient's vision, a driving motor 93 arranged on the connecting disk 5 through a bracket is started, and the driving motor 93 drives the driving gear 91 connected thereto to rotate. The rotating driving gear 91 engages and drives the driving ring gear 92 arranged on the rotating ring 4, and the driving ring gear 92 forces the rotating ring 4 to rotate.

[0073] Each time the driving motor 93 rotates a certain angle, the rotating ring 4 is driven to rotate a certain angle.

[0074] Embodiment 2:

[0075] Reference Fig.10 and Fig.11 , based on the first embodiment,

[0076] A transmission shaft 94 connected to the turntable 3 is rotatably provided on the connecting disk 5. When the driving motor 93 drives the driving gear 91 to rotate, the rotating driving gear 91 will engage with and drive the driving ring gear 92 set on the rotating ring 4. The driving ring gear 92 will force the rotating ring 4 to rotate. At the same time, the driving gear 91 will drive the transmission gear 95 set on the transmission shaft 94 to rotate together through engagement.

[0077] Since the turntable 3 is rotatably connected to the support tube 1, the rotating transmission shaft 94 will drive the turntable 3 connected thereto to rotate together, and the rotation directions of the turntable 3 and the rotating ring 4 are opposite, the perspective window 31 on the turntable 3 will rotate accordingly, and after the driving motor 93 stops, the perspective window 31 on the turntable 3 will randomly capture a test character 63 in a random direction.

[0078] This helps to improve the patient's cooperation during the test and the reliability of the test results. The vision test process is repeated multiple times until the patient is unable to distinguish the direction of the test pattern. The degree recorded by the ophthalmometer 8 is the patient's vision degree, thereby completing a vision test.

[0079] Embodiment three:

[0080] Reference Figure 8 and Fig. 9 , based on the first and second embodiments,

[0081] The support cylinder 1 is provided with a connecting hole 88 located on one side of the sliding hole 81 , the driving shaft 83 is provided with an adjusting gear 881 located in the connecting hole 88 , and the outer ring of the rotating ring 4 is provided with an arc-shaped tooth segment 89 meshing with the adjusting gear 881 .

[0082] Each rotation of the rotating ring 4 will drive the arc-shaped tooth segment 89, and the arc-shaped tooth segment 89 drives the adjusting gear 881 to rotate the driving shaft 83 through meshing. The rotating driving shaft 83 will slide in the interference hole 84 and rotate through the interference rod 85 that is in contact with the thread groove 831, so that the sliding block 82 moves in the sliding hole 81. The sliding block 82 will drive the sliding ring 61 to move together through the connection with the sliding ring 61, and the sliding ring 61 will drive the support plate 62 to move into the support tube 1. The support plate 62 will move the connecting rod 64 into the support tube 1 and drive the test character 63, so that the test character 63 moves a certain distance into the support tube 1, thereby changing the visual distance between the test pattern and the patient to adjust the size of the test pattern in the perspective window 31 seen by the patient, so as to test the patient's eyesight, and thus complete a vision test.

[0083] Due to the design of the arcuate tooth segment 89, each rotation angle of the rotating ring 4 only allows the arcuate tooth segment 89 to fully mesh with the adjusting gear 881 once, that is, the arcuate tooth segment 89 completely moves from one side of the adjusting gear 881 to the other side of the adjusting gear 881 each time, ensuring the precise control of the rotating ring 4 and the moving visual distance of the test character 63, so that the moving distance of the test character 63 is the same each time.

[0084] The implementation principle of the present invention is:

[0085] (1): When measuring the patient's vision, first have the patient stand in front of the eye chart at the standard testing distance to ensure that the eye chart is clearly visible. This distance is usually 6 meters (20 feet), but it can also be adjusted according to the design of the eye chart and needs. Then use an eye patch or cover one of the patient's eyes with your hand to avoid interference between the two eyes.

[0086] (2): Afterwards, the operator can remotely operate to start the driving member 9 provided on the connecting disk 5, and the driving member 9 will drive the rotating ring 4 coaxial with the supporting tube 1 to rotate a certain angle; and since the connecting disk 5 is provided with a plurality of columns 51 connected to the connecting tube 2, the columns 51 will support the connecting disk 5 to ensure that the connecting disk 5 does not rotate; each rotation of the rotating ring 4 will drive the vision detector 6 provided on the rotating ring 4 to work.

[0087] (3): When the vision detector 6 is working, each rotation of the rotating ring 4 will drive the vision detector 6 to generate a test pattern in a random direction, and then display the random test pattern in a perspective window 31 set on the turntable 3. The perspective window 31 allows light to pass through, so that the patient can clearly see the displayed test pattern. The patient's vision is evaluated by observing the direction of the test pattern in the perspective window 31.

[0088] (4): At the same time, each time the test pattern of random direction is switched, the ophthalmometer 8 provided on the support tube 1 will change the visual distance between the test pattern and the patient to adjust the size of the test pattern in the perspective window 31 seen by the patient, so as to test the patient's vision. When the patient cannot distinguish the direction of the test pattern, the degree recorded by the ophthalmometer 8 is the patient's vision.

[0089] (5): When the driving member 9 drives the rotating ring 4 to rotate a certain angle, the rotating ring 4 will drive the connecting rod 64, so that the connecting rod 64 rotates around the axis of the rotating ring 4 and rotates with the rotating ring 4. At the same time, the rotating ring 4 will drive the matching member 7 set on the rotating ring 4 to work, and the matching member 7 will drive the connecting gear 65 rotatably set on the rotating ring 4 to rotate. The connecting gear 65 will be slidably connected with the connecting rod 64 to drive the connecting rod 64 to rotate together.

[0090] (6): Since one end of the connecting rod 64 rotates through the support plate 62 and is connected to the test character 63, a plurality of connecting rods 64 will drive the support plate 62 coaxial with the support tube 1 to rotate together, and at the same time, the connecting rod 64 will also drive the test character 63 to rotate together, so that the test character 63 adapts to the rotation angle of the rotation, and adapts to the rotation angle of the rotating ring 4 by self-rotation, so that the test character 63 produces one or more 90-degree rotations relative to the previous workstation.

[0091] (7): The vision test process is repeated many times until the patient is unable to distinguish the direction of the test pattern. The degree recorded by the ophthalmometer 8 is the patient's visual acuity degree.

[0092] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional remote-controlled ophthalmic vision chart, comprising a support tube (1), a connecting tube (2) being provided on one side of the support tube (1), characterized in that: A rotating disk (3) is provided at one end of the support tube (1), a perspective window (31) is provided on the rotating disk (3), a rotating ring (4) is rotatably provided in the support tube (1), a connecting disk (5) is rotatably provided in the rotating ring (4), a plurality of upright posts (51) connected to the connecting tube (2) are provided on the connecting disk (5), and a vision detector (6) is provided on the rotating ring (4); The vision detector (6) comprises a sliding ring (61) slidably arranged in the support tube (1) and located between the rotating disk (3) and the connecting disk (5); a supporting disk (62) is rotatably arranged in the sliding ring (61); and a plurality of circumferentially uniform test characters (63) are rotatably arranged on the supporting disk (62); The vision detector (6) further comprises a connecting rod (64), the connecting rod (64) corresponding to the test characters (63) being rotatably and slidably provided on the rotating ring (4), one end of the connecting rod (64) being connected to the test characters (63) after being rotatably penetrated through the supporting plate (62), and the connecting gear (65) being rotatably provided on the rotating ring (4) and being slidably connected to the connecting rod (64); The rotating ring (4) is provided with a matching piece (7); the matching piece (7) comprises an inner ring (71) rotatably provided on the rotating ring (4) and located inside a plurality of connecting rods (64); the upright column (51) is provided with a connecting bracket (72) connected to the inner ring (71); and the outer side of the inner ring (71) is provided with at least one arc-shaped rack (73) meshing with a connecting gear (65); The rotating ring (4) is rotatably provided with an outer gear ring (74) located outside the plurality of connecting rods (64); the rotating ring (4) is provided with a driven gear (75) meshing with the outer gear ring (74); and the inner side of the support cylinder (1) is provided with an inner gear ring (76) meshing with the driven gear (75); At least one arc-shaped rack gear (77) meshing with the connecting gear (65) is provided on the inner side of the outer gear ring (74); The support tube (1) is provided with a sight meter (8); the sight meter (8) comprises a sliding hole (81) provided on the support tube (1), a sliding block (82) connected to a sliding ring (61) being slidably provided in the sliding hole (81), a driving shaft (83) being rotatably provided on the support tube (1) via a bracket, and a threaded groove (831) being provided on the driving shaft (83); The support cylinder (1) is provided with a communication hole (88) located on one side of the sliding hole (81); the drive shaft (83) is provided with an adjustment gear (881) located in the communication hole (88); and the outer ring of the rotating ring (4) is provided with an arc-shaped tooth segment (89) meshing with the adjustment gear (881).

2. A multifunctional remote-controlled ophthalmic vision chart according to claim 1, characterized in that: The sliding block (82) is provided with a resistance hole (84), a resistance rod (85) is slidably disposed in the resistance hole (84) and is in resistance with the thread groove (831), a limit ring (851) is disposed on the resistance rod (85), and a resistance spring (86) is disposed between the upper end of the limit ring (851) and the resistance hole (84).

3. The multifunctional remote-controlled ophthalmic vision chart according to claim 1, characterized in that: A return spring (87) is provided between the sliding ring (61) and the supporting plate (62).

4. The multifunctional remote-controlled ophthalmic vision chart according to claim 2, characterized in that: The abutment rod (85) is provided with a threaded section (852) threadably connected to the sliding block (82).

5. The multifunctional remote-controlled ophthalmic vision chart according to claim 1, characterized in that: The connecting disk (5) is provided with a driving member (9); The driving member (9) comprises a driving gear (91) rotatably arranged on the connecting plate (5), and the rotating ring (4) is provided with a driving gear ring (92) meshing with the driving gear (91).

6. The multifunctional remote-controlled ophthalmic vision chart according to claim 1, characterized in that: A transmission shaft (94) connected to the rotating disk (3) is rotatably provided on the connecting disk (5), and the rotating disk (3) is rotatably connected to the supporting cylinder (1). A transmission gear (95) meshing with the driving gear (91) is provided on the transmission shaft (94).

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