A mechanism for inspecting ophthalmoscopes and retinoscopes.

Abstract

This utility model provides a mechanism for examining ophthalmoscopes and retinoscopes, including a base assembly comprising a guide rail and a distance scale disposed on the guide rail; a clamping and adjusting assembly disposed at one end of the guide rail, wherein a lifting platform is used to drive the support plate to rise and fall, and an angle adjusting seat is provided with an angle tilting slide, the angle adjusting seat being connected to the clamping seat; a translation seat disposed on the surface of the angle adjusting seat; a lens assembly mounted at one end of the translation seat, comprising a lens lifting seat, a lens rotation axis, and a 3D lens, the 3D lens being mounted on the lens rotation axis; a point light source assembly mounted at the other end of the translation seat, comprising a lamp source, a lamp source front-to-back translation axis, and a lamp source up-to-down movement seat; and a scale plate assembly slidably disposed on the guide rail, the scale plate assembly comprising a scale plate and scale paper disposed on the scale plate.

Description

Technical Field

[0001] This utility model mainly relates to the field of ophthalmic medical technology, specifically to a mechanism for testing ophthalmoscopes and retinoscopes. Background Technology

[0002] A retinoscope is a core instrument in ophthalmology and optometry used to objectively measure the refractive state of the human eye (myopia, hyperopia, astigmatism). Its principle is to illuminate the fundus with a light source and observe the "shadow movement" of the reflected light to determine the refractive power. Its core optical requirements are as follows: 1. The light source of the strip retinoscope is a straight filament, projecting a thin, uniform, and clearly defined light band; 2. The filament must be able to move axially to change the distance between the filament and the condenser lens, adjusting the convergence and divergence of the light band, including parallelism, divergence, and convergence; 3. The filament must have 360° rotation to position the optical axis.

[0003] An ophthalmoscope is a basic ophthalmic examination instrument, primarily used to observe the fundus and also to assist in examining the refractive media. It allows for direct visualization of the retina, optic nerve, macula, blood vessels, and vitreous body, and helps screen for myopia, hyperopia, fundus changes, fundus hemorrhage, retinal detachment, macular degeneration, optic neuritis, etc. Its core optical requirements are: 1. When projecting at a distance of 250mm from the projection aperture, the illumination spot should be uniform, with clear edges and no dispersion; 2. The central grid lines of the ophthalmoscope should be continuous and clear, and the slit brightness should be uniform; 3. The field of view must meet the requirements.

[0004] Because of the many functions of retinoscopes and ophthalmoscopes, their inspection process is inevitably complicated, involves many steps, and is time-consuming. In order to address this drawback of the inspection process, this utility model develops a mechanism for inspecting ophthalmoscopes and retinoscopes. Its significant advantage is that this mechanism integrates multiple functions into one, and all procedures in the inspection process can be completed on this mechanism, eliminating the need for multi-station inspection, reducing time, and making the inspection more accurate. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model: This utility model provides a mechanism for examining ophthalmoscopes and retinoscopes, in order to solve the technical problems existing in the background art.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution of this utility model is as follows: A mechanism for examining ophthalmoscopes and retinoscopes, comprising: The base assembly includes a guide rail and a distance scale disposed on the guide rail; A clamping and adjusting assembly is disposed at one end of the guide rail, including a lifting platform, a support plate connected to the movable end of the lifting platform and raised and lowered with it, and an angle adjusting seat disposed on the support plate. The lifting platform is used to drive the support plate to rise and fall, and the angle adjusting seat is provided with an angle tilting slide. The angle adjusting seat is connected to the clamping seat. A translation seat is disposed on the surface of the angle adjustment seat; A lens assembly, installed at one end of the translation seat, includes a lens lifting seat, a lens rotation axis, and a 3D lens, wherein the 3D lens is mounted on the lens rotation axis; A point light source assembly is installed at the other end of the translation base, including a light source, a front-to-back translation axis for the light source, and a vertical moving base for the light source; A scale plate assembly is slidably disposed on the guide rail, the scale plate assembly including a scale plate and scale paper disposed on the scale plate.

[0007] Furthermore, a clamping sleeve is detachably provided on the clamping base. The clamping sleeve is an elastic sleeve with an opening, and its inner diameter matches the outer diameter of the ophthalmoscope or retinoscope to be inspected. Different models of instruments to be inspected can be adapted by changing clamping sleeves with different inner diameters.

[0008] Furthermore, the clamping base is provided with multiple locking screws, and the ophthalmoscope or retinoscope to be inspected is fixed by tightening the multiple locking screws.

[0009] Furthermore, the base assembly also includes a positioning slider that is slidably disposed on the guide rail. The positioning slider is provided with a positioning baffle, which is magnetically attached to the positioning slider and is used to abut against the ophthalmoscope or retinoscope to be inspected in order to calibrate the starting point of the inspection distance.

[0010] Furthermore, the 3D lens can rotate around the lens rotation axis to cut into or out of the optical axis of the ophthalmoscope or retinoscope to be inspected.

[0011] Furthermore, the position of the light source is adjusted by the front-to-back translation axis, the up-to-down movement seat, and the translation seat, so that the light emitted by it passes through the center of the ophthalmoscope or retinoscope to be inspected and forms an inspection light spot on the scale paper.

[0012] Furthermore, the lifting platform, the translation seat, the lens lifting seat, and the lamp source moving seat are all driven by a screw and nut mechanism.

[0013] Furthermore, the distance scale is used to calibrate the inspection distance between the light outlet of the ophthalmoscope or retinoscope to be inspected and the scale plate, wherein the inspection distance is 250mm or 500mm; the 250mm is used for ophthalmoscope inspection, and the 500mm is used for retinoscope inspection.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model integrates multiple functions and can be adapted to the inspection needs of various types of ophthalmoscopes and retinoscopes. All procedures in the inspection process can be completed in this mechanism, eliminating the need for multi-station inspection, reducing time, improving work efficiency, and making the inspection more accurate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A magnified structural diagram of part A; Figure 3 This utility model Figure 1 Another structural diagram; Figure 4 This utility model Figure 3 Enlarged structural diagram of section B; Figure 5 This is a schematic diagram showing the disassembled state of different products corresponding to this utility model; Figure 6 This is a schematic diagram of another product inspection structure of this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram of section C.

[0016] The attached diagram is labeled as follows: 1-Lens lifting seat, 2-Lifting platform, 3-Lens rotation axis, 4-Translation seat, 5-Angle adjustment seat, 6-Clamping seat, 7-Distance scale, 8-Scale plate translation seat, 9-Scale plate slider, 10-Scale plate, 11-Guide rail, 12-Positioning slider, 13-Positioning baffle, 14-3D lens, 15-Clamping sleeve, 16a-Retinoscope, 16b-Ophthalmoscope, 17-Positioning baffle magnetic attraction, 18-Light source, 19-Light source front and rear translation axis, 20-Light source up and down moving seat, 21-Scale paper, 22-Support plate. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model and all adopt existing technologies.

[0020] Reference Figure 1-7 This embodiment provides a mechanism for examining ophthalmoscopes and retinoscopes. Its main components include a lens lifting seat 1, a lifting platform 2, a lens rotation axis 3, a translation seat 4, an angle adjustment seat 5, a clamping seat 6, a distance scale 7, a scale plate translation seat 8, a scale plate slider 9, a scale plate 10, a guide rail 11, a positioning slider 12, a positioning baffle 13, a 3D lens 14, a clamping sleeve 15, an ophthalmoscope 16b or a retinoscope 16a, a positioning baffle magnetic suction 17, a lamp source 18, a lamp source front and rear translation axis 19, a lamp source up and down moving seat 20, a scale paper 21, and a support plate 22. The lifting platform 2 has a support plate 22 on one side, and an angle adjustment seat 5 on the support plate 22. The angle adjustment seat 5 is connected to the clamping seat 6, and an angle tilting slide is provided on the angle adjustment seat 5. The angle tilting slide adopts a standard part commonly used in the field. In this embodiment, the angle tilting slide is connected to the clamping seat 6 through a connector to realize the angle adjustment of the ophthalmoscope 16b or retinoscope 16a clamped in the clamping seat 6. The surface of the angle adjustment seat 5 is provided with a translation seat 4. At the two ends above the translation seat 4, there are lens assemblies (including lens lifting seat 1, lens rotation axis 3 and 3D lens 14) and point light source assemblies (including lamp source 18, lamp source front and rear translation axis 19 and lamp source up and down moving seat 20). The lifting platform 2, translation seat 4, lens lifting seat 1 and lamp source up and down moving seat 20 are all driven by a screw and nut mechanism. After assembly, it should be as follows. Figure 1 , Figure 2 as well as Figure 3 As shown.

[0021] Each sliding component on the guide rail 11 is equipped with a locking screw to lock the corresponding sliding component at the target position on the guide rail 11.

[0022] The basic function of this mechanism is divided into two parts. The first part is the retinoscope: specifically, the retinoscope 16a is fixed on the clamping base 6 using a suitable clamping sleeve 15, and the retinoscope 16a is locked in place by the corresponding 3 screws on the clamping base 6.

[0023] The positioning slider 12 is provided with a connecting plate, and a magnet is embedded in the connecting plate to form a positioning baffle magnetic suction 17; the positioning baffle 13 is made of ferromagnetic material, is fixed to the connecting plate by magnetic attraction, and can be removed by overcoming the magnetic force under the action of external force.

[0024] Adjustment of the light spot distance: Adjust the position of the positioning slider 12 so that the positioning baffle 13 is attached to the positioning baffle magnet 17. Move the positioning slider 12 so that the positioning baffle 13 can rest against the light outlet of the retinoscope 16a. Read the starting position on the distance scale 7. Adjust the position of the scale slider 9 so that the scale 10 moves on the guide rail 11. The bottom of the scale 10 points to another value on the distance scale 7, which is the endpoint. The endpoint value minus the starting position value is the distance of the light spot illumination. This inspection distance is set according to the requirements of YY 0718-2009 "Ophthalmic Instruments - Retinoscope" and ISO 10942-2022 "Ophthalmic Instruments - Direct Ophthalmoscope" and other standards: 500mm for retinoscope inspection and 250mm for ophthalmoscope inspection. After setting the distance, the positioning baffle 13 can be removed. The adjustment method of the light spot position is as follows: Up and down position adjustment: Rotate the handwheel on the lifting platform 2, and the lifting platform 2 drives the support plate 22 to rise and fall through the screw nut mechanism, thereby adjusting the up and down position of the retinoscope 16a.

[0025] Tilt angle position adjustment: Rotate the handle on the angle adjustment seat 5 to adjust the tilt angle of the retinoscope 16a by means of the angle tilt slide on the angle adjustment seat 5, so as to keep it in a horizontal position.

[0026] Left and right position adjustment: Rotate the handle on the scale plate translation seat 8 to drive the scale plate 10 to translate left and right through the screw and nut mechanism, and adjust the cross coordinates of the scale paper 21 to align with the center of the light spot. Adjust the center of the light spot to be on the center of the scale paper 21 through the above steps.

[0027] Its functional testing method is as follows: (1) Open the retinoscope 16a so that its strip light falls on the scale paper 21 on the scale plate 10. Adjust the light source of the retinoscope 16a to a straight filament, projecting a thin, uniform light strip with clear boundaries. The scale paper 21 is white, and you can clearly see whether there are any defects at the edge.

[0028] (2) Adjust the light band convergence and divergence, including parallelism, divergence and convergence, and see if the light spot on the scale paper 21 is uniform. Then rotate the filament on the retinoscope 16a to rotate it 360°. By observing the scale range of the light spot movement on the scale paper 21, directly judge whether it meets the requirement that the rotation center is in a certain range.

[0029] (3) Adjust the vertical position of the lens lifting seat 1 (driven by the lead screw and nut mechanism), then adjust the horizontal position of the translation seat 4 (driven by the lead screw and nut mechanism), and finally adjust the front and rear position of the lens rotation axis 3. At the same time, move the 3D lens 14 to the direction of the retinoscope 16a so that the light spot of the retinoscope 16a passes through the center of the 3D lens 14 and is in contact with the retinoscope 16a. This allows for the testing of other optical properties of the retinoscope 16a. After testing, move the lens rotation axis 3 back so that the 3D lens 14 is on the other side without affecting the testing of other functions.

[0030] The first part is the ophthalmoscope. Its installation, distance adjustment process, and spot position adjustment are the same as those of the retinoscope. Its specific usage is as follows: (1) Replace with ophthalmoscope 16b and the corresponding clamping sleeve 15, and adjust the position of the light spot and the scale plate 10. Observe that the light spot is uniform on the scale paper 21, the edge of the light spot is clear, and there is no dispersion. The central network lines of ophthalmoscope 16b should be continuous and clear, and the brightness of the slits should be uniform.

[0031] (2) Then turn on the light source 18, adjust the displacement of the light source front and back translation axis 19, the light source up and down moving seat 20, and the translation seat 4 in three directions, so that the light energy emitted by the light source 18 passes through the center of the ophthalmoscope 16b and produces a light spot on the scale paper 21. The size of the light spot can be used to directly check whether the field of view meets the requirements.

[0032] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A mechanism for inspecting ophthalmoscopes and loupes, characterized in that, include: The base assembly includes a guide rail (11) and a distance scale (7) disposed on the guide rail (11). The clamping and adjusting assembly is located at one end of the guide rail (11) and includes a lifting platform (2), a support plate (22) connected to the movable end of the lifting platform (2) and raised and lowered with it, and an angle adjusting seat (5) provided on the support plate (22). The lifting platform (2) is used to drive the support plate to rise and fall. The angle adjusting seat (5) is provided with an angle tilting slide. The angle adjusting seat (5) is connected to the clamping seat (6). A translation seat (4) is disposed on the surface of the angle adjustment seat (5); The lens assembly, installed at one end of the translation seat (4), includes a lens lifting seat (1), a lens rotation shaft (3) and a 3D lens (14), wherein the 3D lens (14) is installed on the lens rotation shaft (3); A point light source assembly is installed at the other end of the translation seat (4), including a light source (18), a front and rear translation axis (19) for the light source, and a vertical moving seat (20) for the light source. A scale plate assembly is slidably disposed on the guide rail (11). The scale plate assembly includes a scale plate (10) and scale paper (21) disposed on the scale plate (10).

2. A mechanism for testing ophthalmoscopes and loupes as claimed in claim 1, characterized in that, The clamping base (6) is detachably provided with a clamping sleeve (15), which is an elastic sleeve with an opening. Its inner diameter matches the outer diameter of the ophthalmoscope (16b) or retinoscope (16a) to be inspected. Different models of instruments to be inspected can be adapted by changing the clamping sleeve (15) with different inner diameters.

3. A mechanism for testing ophthalmoscopes and loupes as claimed in claim 2, characterised in that, The clamping seat (6) is provided with multiple locking screws, and the ophthalmoscope (16b) or retinoscope (16a) to be inspected is fixed by tightening the multiple locking screws.

4. A mechanism for testing ophthalmoscopes and loupes as defined in claim 1, characterized in that The base assembly also includes a positioning slider (12) that can be slidably disposed on the guide rail (11). The positioning slider (12) is provided with a positioning baffle (13). The positioning baffle (13) is disposed on the positioning slider (12) by magnetic attraction and is used to abut against the ophthalmoscope (16b) or retinoscope (16a) to be inspected in order to calibrate the starting point of the inspection distance.

5. A mechanism for testing ophthalmoscopes and loupes as defined in claim 1, characterized in that The 3D lens (14) can rotate about the lens rotation axis (3) to cut into or out of the optical axis of the ophthalmoscope (16b) or retinoscope (16a) to be examined.

6. A mechanism for testing ophthalmoscopes and loupes as defined in claim 1, characterized in that The position of the light source (18) is adjusted by the front and rear translation axis (19), the up and down moving seat (20) and the translation seat (4) so ​​that the light emitted by it passes through the center of the ophthalmoscope (16b) or retinoscope (16a) to be inspected and forms an inspection light spot on the scale paper (21).

7. A mechanism for testing ophthalmoscopes and loupes as defined in claim 1, characterized in that The lifting platform (2), the translation seat (4), the lens lifting seat (1), and the lamp source moving seat (20) are all driven by a screw and nut mechanism.

8. A mechanism for testing ophthalmoscopes and loupes as defined in claim 1, characterized in that The distance scale (7) is used to calibrate the inspection distance between the light outlet of the ophthalmoscope (16b) or retinoscope (16a) to be inspected and the scale plate (10). The inspection distance is 250mm or 500mm. The 250mm is used for the inspection of the ophthalmoscope (16b), and the 500mm is used for the inspection of the retinoscope (16a).

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