Ophthalmic phoropter
By designing an adjustable forehead rest and a quick-release structure, the problem of the non-adjustable forehead rest in existing optometers has been solved, improving patient comfort and testing accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI HUBICHI MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-06-19
AI Technical Summary
The forehead rest of the existing comprehensive optometry instrument cannot be adjusted in height, which forces patients with large differences in height to use it in an unnatural posture, resulting in neck muscle fatigue and inaccurate test results.
An adjustable forehead support structure was designed, which allows for height adjustment via a sliding column and spring assembly, and quick disassembly via a wrench and locking column assembly.
This improved the applicability of the equipment, reduced neck muscle fatigue in patients, ensured the accuracy of test results, and reduced the risk of bacterial residue.
Smart Images
Figure CN224369838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ophthalmic optometry instruments, and in particular to a comprehensive ophthalmic optometry instrument. Background Technology
[0002] Ophthalmic phoropter is a key piece of equipment for clinical diagnosis and vision testing in ophthalmology, and is widely used in ophthalmic medical institutions, optometry centers, and optical shops. It encompasses multiple disciplines including optics, mechanics, and electronics, aiming to comprehensively assess a patient's vision through a series of precise measurement methods, providing crucial information for accurate prescription of eyeglasses and the diagnosis and treatment of ophthalmic diseases.
[0003] In existing technologies, ophthalmic refractometers primarily use a combination of optical lenses to detect different visual acuity parameters. Their mechanical structure typically includes a fixed main frame for supporting and mounting various optical components, electronic displays, and operational control elements. The patient-use portion commonly features a fixed forehead rest structure, directly fixed to the main frame of the refractometer, lacking a flexible adjustment mechanism. During testing, the patient must adjust their body position to align their eyes with the refractometer's detection window. The optical system emits specific light rays, which are refracted by the patient's eyes, and the receiving system captures and analyzes the changes in light to calculate parameters such as visual acuity, astigmatism, and pupillary distance.
[0004] However, the fixed forehead rest in existing comprehensive optometry instruments has significant shortcomings. Due to the large differences in height among patients, when taller or shorter patients use the instrument, if the forehead rest cannot be adjusted in height, they are forced to adopt unnatural postures to accurately align their eyes with the testing window. For example, taller patients need to lower their heads excessively, while shorter patients need to tilt their heads back as much as possible. Maintaining this unnatural posture for extended periods can easily lead to neck muscle fatigue. This not only causes discomfort for patients during the refraction process, affecting their cooperation, but also interferes with the accuracy of the refraction results due to unstable head posture. Consequently, it limits the widespread application of ophthalmic comprehensive optometry instruments for patients of different heights, reducing the applicability and testing effectiveness of the equipment. Therefore, this paper proposes an ophthalmic comprehensive optometry instrument to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a comprehensive optometry instrument for ophthalmology, which aims to improve the problem in the prior art where the height of the forehead rest cannot be adjusted, and patients with large differences in height are forced to fit the device in an unnatural posture, resulting in neck muscle fatigue.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An ophthalmic comprehensive optometry instrument includes a base, an optometry device fixedly connected to the top of the base, a support frame fixedly connected to the side wall of the base, a support component provided on the top of the support frame, a hollow plate fixedly connected to the top of the support frame, holes opened inside the hollow plate, and an adjustment component provided on the inner wall of the hollow plate.
[0008] The adjustment assembly includes a sliding column, the outer wall of which is slidably connected to the inside of a hollow plate, a forehead support fixedly connected to the side wall of the sliding column, a first spring provided inside the sliding column, one end of the first spring fixedly connected to the inside of the sliding column, and a retaining ball fixedly connected to the other end of the first spring, the outer wall of the retaining ball being slidably connected to the inside of a hole.
[0009] As a further description of the above technical solution:
[0010] The support assembly includes a support column, the bottom of which is fixedly connected to the top of the support frame.
[0011] As a further description of the above technical solution:
[0012] A connecting plate is fixedly connected to the outer wall of the support column, and a limit column is rotatably connected inside the connecting plate.
[0013] As a further description of the above technical solution:
[0014] A wrench is rotatably connected to the outer wall of the limiting post, and a connecting post is rotatably connected inside the wrench. A second locking post is fixedly connected to the outer wall of the connecting post.
[0015] As a further description of the above technical solution:
[0016] The outer wall of the second locking pin is slidably connected to the inside of the support column, and the inside of the wrench is slidably connected to the third locking pin.
[0017] As a further description of the above technical solution:
[0018] A second spring is provided on the outer wall of the third locking post. One end of the second spring is fixedly connected to the outer wall of the third locking post, and the other end of the second spring is fixedly connected to the inside of the wrench.
[0019] As a further description of the above technical solution:
[0020] The outer wall of the second spring is disposed inside the support column, and the inner wall of the support column is slidably connected to the first locking post.
[0021] As a further description of the above technical solution:
[0022] The outer wall of the second card post is located inside the first card post, and a hollow column is fixedly connected to the outer wall of the first card post. A chin support is fixedly connected to the top of the hollow column.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, by pulling the forehead support, the sliding column is moved together. Then, the movement of the sliding column will drive the first spring to move together. Since the first spring will lock the ball at one end inside the hollow plate, the height of the forehead support can be adjusted. This solves the problem that patients with large height differences are forced to fit the device in an unnatural posture, which leads to neck muscle fatigue, because the height of the forehead support cannot be adjusted. This improves the versatility of ophthalmic comprehensive optometry instruments.
[0025] 2. In this utility model, by turning the wrench, the limiting post and connecting post on the inner wall are rotated. Then, the rotation of the connecting post pulls the second locking post to slide inside the support post, and the second locking post is disengaged from the inside of the first locking post, thus achieving the effect of quickly disassembling the forehead support. This solves the problem that it is difficult to thoroughly disinfect the gap between the fixed bracket and the main body of the equipment, which increases the risk of bacterial residue and improves the practicality of the ophthalmic comprehensive optometry instrument. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a comprehensive optometry instrument for ophthalmology proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the sliding column of a comprehensive optometer for ophthalmology proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the exploded structure of the chin rest of a comprehensive optometry instrument for ophthalmology proposed in this utility model.
[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.
[0030] Legend:
[0031] 1. Optometry device; 2. Base; 3. Support frame; 4. Hollow plate; 5. Hole; 6. Forehead support; 7. Sliding post; 8. First spring; 9. Ball holder; 10. Chin support; 11. First locking post; 12. Hollow post; 13. Support post; 14. Wrench; 15. Connecting plate; 16. Limiting post; 17. Connecting post; 18. Second locking post; 19. Third locking post; 20. Second spring. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figure 1 and Figure 2 An embodiment of this utility model provides: an ophthalmic comprehensive optometry instrument, including a base 2. The base 2 is made of high-density engineering plastic such as ABS in one piece, which is both lightweight and impact-resistant. An anti-slip rubber pad is added to the bottom to improve the stability of the device. An optometry device 1 is fixedly connected to the top of the base 2. A support frame 3 is fixedly connected to the side wall of the base 2. A support component is provided on the top of the support frame 3. A hollow plate 4 is fixedly connected to the top of the support frame 3. Holes 5 are opened inside the hollow plate 4. An adjustment component is provided on the inner wall of the hollow plate 4.
[0034] The adjustment assembly includes a sliding column 7, which is injection molded from POM (polyoxymethylene) resin and has excellent self-lubricating properties. Its outer wall fits snugly against the hollow plate 4. The outer wall of the sliding column 7 is slidably connected to the inside of the hollow plate 4. A forehead support 6 is fixedly connected to the side wall of the sliding column 7. The surface of the forehead support 6 is covered with a medical-grade silicone layer with a Shore hardness suitable for skin-friendly antibacterial properties and easy cleaning. A first spring 8 is installed inside the sliding column 7. One end of the first spring 8 is fixedly connected to the inside of the sliding column 7. The other end of the first spring 8 is fixedly connected to a retaining ball 9. The outer wall of the retaining ball 9 is slidably connected to the inside of the hole 5.
[0035] Reference Figure 1 , Figure 3 and Figure 4The support assembly includes a support column 13, the bottom of which is fixedly connected to the top of the support frame 3. A connecting plate 15 is fixedly connected to the outer wall of the support column 13. A limit post 16 is rotatably connected inside the connecting plate 15. A wrench 14 is rotatably connected to the outer wall of the limit post 16. A connecting column 17 is rotatably connected inside the wrench 14. A second locking post 18 is fixedly connected to the outer wall of the connecting column 17. The surface of the second locking post 18 is hard chrome plated and slides with the PEEK wear-resistant bushing on the inner wall of the support column 13. The outer wall of the second locking post 18 is slidably connected inside the support column 13. A third locking post 19 is slidably connected inside the wrench 14. The third locking post 19 is made of spring steel strip stamping and is used in conjunction with a second spring 20 made of silicon manganese steel. It features a bidirectional locking function. The springs undergo stress-relief tempering treatment to ensure service life. A second spring 20 is installed on the outer wall of the third locking post 19. One end of the second spring 20 is fixedly connected to the outer wall of the third locking post 19, and the other end is fixedly connected to the inside of the wrench 14. The outer wall of the second spring 20 is located inside the support post 13. The inner wall of the support post 13 is slidably connected to the first locking post 11. The outer wall of the second locking post 18 is located inside the first locking post 11. A hollow post 12 is fixedly connected to the outer wall of the first locking post 11. A chin support 10 is fixedly connected to the top of the hollow post 12. The chin support 10 is made of soft PU foam material, and its open-pore structure design allows for breathability and sweat wicking, avoiding pressure marks caused by prolonged contact.
[0036] Working principle: When using an ophthalmic comprehensive optometry instrument and adjusting the height of the forehead support 6, the forehead support 6 is first pulled. Then, the forehead support 6 moves the sliding columns 7 on both sides. When the sliding columns 7 move, the first spring 8 inside moves. When the first spring 8 moves, the locking ball 9 on the side wall moves. When the locking ball 9 moves, its outer wall is locked inside the hollow plate 4 and fits against the inside of the hole 5. When the position is locked, the elasticity of the first spring 8 will hold the locking ball 9 against the inside of the hollow plate 4, thus achieving the effect of adjusting the height of the forehead support 6.
[0037] Next, when disassembling and replacing the chin support 10, the third locking post 19 needs to be pulled first. The force applied to the third locking post 19 will cause it to disengage from the support post 13. Simultaneously, the force applied to the third locking post 19 will cause the second spring 20 on the outer wall to contract, and the second spring 20 will provide a rebound force to the third locking post 19, thus resetting it. Next, the wrench 14 needs to be turned. The force applied to the wrench 14 will cause it to rotate against the side wall of the connecting plate 15, and the wrench 14 will move along the central axis of the limiting post 16. In the circular motion, as the wrench 14 rotates, it will move the connecting post 17 on the inner wall. Then, as the connecting post 17 moves, it will move the second locking post 18 on the outer wall, causing it to slide inside the support post 13. The second locking post 18 has two diameters: two larger diameters and two smaller diameters. At the same time, the first locking post 11 has a protrusion inside, and the position of the protrusion matches the smaller diameter part. Thus, the first locking post 11 can be locked inside the support post 13, achieving the effect of quickly removing the forehead support 6.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A comprehensive optometer for ophthalmology, comprising a base (2), characterized in that: The base (2) is fixedly connected to the top of the optometry device (1), the base (2) is fixedly connected to the side wall of the base (2) and the support frame (3) is fixedly connected to the side wall of the base (2). The support frame (3) is provided with a support component on the top of the support frame (3) and a hollow plate (4) is fixedly connected to the top of the support frame (3). The hollow plate (4) has holes (5) inside and an adjustment component is provided on the inner wall of the hollow plate (4). The adjustment assembly includes a sliding column (7), the outer wall of which is slidably connected to the inside of the hollow plate (4), a forehead support (6) is fixedly connected to the side wall of the sliding column (7), a first spring (8) is provided inside the sliding column (7), one end of the first spring (8) is fixedly connected to the inside of the sliding column (7), and the other end of the first spring (8) is fixedly connected to a retaining ball (9), the outer wall of the retaining ball (9) is slidably connected to the inside of the hole (5).
2. The ophthalmic comprehensive optometry instrument according to claim 1, characterized in that: The support assembly includes a support column (13), the bottom of which is fixedly connected to the top of the support frame (3).
3. The ophthalmic comprehensive optometry instrument according to claim 2, characterized in that: The outer wall of the support column (13) is fixedly connected to a connecting plate (15), and a limit column (16) is rotatably connected inside the connecting plate (15).
4. The ophthalmic comprehensive optometry instrument according to claim 3, characterized in that: A wrench (14) is rotatably connected to the outer wall of the limiting post (16), and a connecting post (17) is rotatably connected inside the wrench (14). A second locking post (18) is fixedly connected to the outer wall of the connecting post (17).
5. The ophthalmic comprehensive optometry instrument according to claim 4, characterized in that: The outer wall of the second locking post (18) is slidably connected to the inside of the support post (13), and the third locking post (19) is slidably connected inside the wrench (14).
6. The ophthalmic comprehensive optometry instrument according to claim 5, characterized in that: The outer wall of the third locking post (19) is provided with a second spring (20), one end of the second spring (20) is fixedly connected to the outer wall of the third locking post (19), and the other end of the second spring (20) is fixedly connected to the inside of the wrench (14).
7. The ophthalmic comprehensive optometry instrument according to claim 6, characterized in that: The outer wall of the second spring (20) is disposed inside the support column (13), and the inner wall of the support column (13) is slidably connected to the first locking post (11).
8. The ophthalmic comprehensive optometry instrument according to claim 7, characterized in that: The outer wall of the second card post (18) is located inside the first card post (11), and a hollow column (12) is fixedly connected to the outer wall of the first card post (11). A chin support (10) is fixedly connected to the top of the hollow column (12).