Novel comprehensive optometry unit

Abstract

The invention relates to a novel comprehensive optometry unit, and relates to the technical field of ophthalmology optometry, the novel comprehensive optometry unit comprises a workbench, the right side of the upper part of the workbench is provided with a sliding table top, the upper part of the sliding table top is slidably connected with a computer optometry unit, and the rear side of the computer optometry unit is provided with a lens; the rear side of the computer optometry unit is fixedly connected with a head fixing assembly, the head fixing assembly is used for fixing the position of the head when the computer optometry unit is used, it is ensured that binocular lenses can clearly detect the eyes, the bottom of the workbench is fixedly connected with lifting supporting legs, the bottoms of the lifting supporting legs are fixedly connected with a movable base, and the movable base is fixedly connected with the computer optometry unit. Supporting legs are fixedly connected to the four corners of the bottom of the moving base, and moving wheels are installed at the four corners of the outer sides of the supporting legs. According to the device, slight shaking possibly caused by the existence of the trundles in the fine optometry process of the device is effectively avoided, and the stability of an optical detection system is ensured, so that the reliability and the accuracy of a measurement result are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ophthalmic refraction technology, in particular to a new type of comprehensive refraction instrument. BACKGROUND

[0002] The comprehensive refraction instrument is the core equipment in the ophthalmic optometry examination, which is used to accurately measure the refractive state of the human eye, including myopia, hyperopia, astigmatism and other parameters, and is an important basis for lens fitting prescription and ophthalmic diagnosis.

[0003] The traditional comprehensive refraction instrument usually adopts a mechanical multi-lens combination mode. It integrates multiple groups of spherical, cylindrical and prism optical lenses with different refractive powers inside. These lenses are installed on a rotatable lens disc. During the refraction process, the refractionist switches different lens combinations in front of the patient's eye through manual or electric control system, and gradually accurately measures the refractive power of the eye by asking the patient's feedback. In order to adapt to different patients, adjustable headrest and chinrest are also provided on the device to fix the patient's head and ensure that the measurement light path is aligned with the pupil. For the equipment that needs to be moved, the base is usually equipped with casters to facilitate transfer between different examination rooms. The whole refraction process generally first uses a computer refraction instrument for preliminary objective measurement, and then uses a comprehensive refraction instrument for fine subjective refraction, and finally determines the refractive correction scheme.

[0004] The comprehensive refraction instrument in the prior art mainly has the disadvantages of operation experience, adjustment precision and use stability. It relies on mechanical drive to switch multiple groups of physical lenses built-in. The rotation of such mechanical structure inevitably produces noise, which may interfere with the quietness of the refraction environment and affect the patient's concentration. More importantly, since the lens power is discrete, its adjustment can only be done in fixed steps, and continuous and smooth power change cannot be achieved, which limits the fineness and individualization degree of the refraction result. At the same time, the complex mechanical assembly and lens processing will introduce cumulative errors, resulting in a difference between the displayed theoretical power and the actual optical effect that is difficult to compensate, affecting the accuracy of the final prescription.

[0005] In addition, in terms of patient adaptation, the adjustment mechanism design of the chinrest and other components of the traditional device is often cumbersome, and the adjustment process is not quick enough, prolonging the preparation time of each patient. For the movable refraction equipment, mobility and stability during use are often a pair of contradictions. The equipment with casters may affect the stability of the detection light path due to slight shaking after positioning, thereby affecting the reliability of the measurement data.

[0006] In view of the related technology in the above, a new type of comprehensive refraction instrument is provided. SUMMARY

[0007] The purpose of the present application is to provide a new comprehensive optometry instrument, which solves the technical problems of low optometry accuracy, low adjustment efficiency and poor use stability of the existing comprehensive optometry instrument due to the use of mechanical structure.

[0008] By adopting the above technical scheme, a new comprehensive optometry instrument is provided, which comprises a workbench, a sliding table is installed on the upper right side of the workbench, a computer optometry instrument is slidably connected to the upper part of the sliding table, a lens is installed on the rear side of the computer optometry instrument, a head fixing assembly is fixedly connected to the rear side of the computer optometry instrument, the head fixing assembly is used to fix the position of the head when the computer optometry instrument is used to ensure that the binocular lens can clearly detect the two eyes, a lifting leg is fixedly connected to the bottom of the workbench, a moving seat is fixedly connected to the bottom of the lifting leg, supporting legs are fixedly connected to the bottom of the moving seat at four corners, moving wheels are installed on the outer sides of the four corners of the supporting legs, an installation plate is fixedly connected to the upper part of the moving wheel, installation cavities are formed in the left and right sides of the moving seat, a lifting mechanism is rotatably connected to the inside of the installation cavity on the left side, the lifting mechanism comprises a worm, a rocker is fixedly connected to the top of the worm, a worm wheel is meshingly connected to the worm, a connecting shaft is fixedly connected to the inside of the worm wheel, a gear is fixedly connected to the outer right end of the connecting shaft, a rack plate is meshingly connected to the gear, the rack plate is fixedly connected to the upper part of the installation plate on the right side, a telescopic rod is fixedly connected to the upper part of the installation plate on the right side, limit assemblies are fixedly connected to the front and back of the side of the lifting leg close to each other, the limit assemblies are used to ensure that the installation plate keeps balance when driving the moving seat to move upward.

[0009] Preferably, the head fixing assembly comprises a jaw frame, the jaw frame is fixedly connected to the rear side of the sliding table, an installation groove is formed in the inner bottom of the jaw frame, an adjusting rod is slidably connected to the inside of the installation groove, a chin support is fixedly connected to the upper part of the adjusting rod, a movable rod is slidably connected to the inside of the installation groove, a button is fixedly connected to the rear end of the movable rod, a positioning hook is fixedly connected to the front end of the movable rod, positioning holes are uniformly distributed on one side of the adjusting rod, and the positioning hook is snap-fit connected to the inside of the positioning hole.

[0010] Preferably, a lifting rod is fixedly connected to the upper left side of the workbench, an installation frame is fixedly connected to the outer telescopic end of the lifting rod, a turning piece is installed in the inner one end of the installation frame, an installation piece is installed in the inner one end of the turning piece, an optometry disc is threadedly connected to the bottom end of the installation piece, a supporting rod is installed on the upper side of the installation frame, a remote control visual chart is rotatably connected to the inner one end of the supporting rod, and an illumination assembly is fixedly connected to the top of the extension end of the lifting rod.

[0011] Preferably, the limiting assembly comprises limiting blocks fixedly connected on the front and back of the side close to the installation plate, and the lower part of the side close to the installation cavity is provided with limiting grooves with the same number as the limiting blocks.

[0012] Preferably, the lighting assembly comprises an extension sleeve fixedly connected to the top of the extension end of the lifting rod, and one end of the extension sleeve is fixedly connected with a lighting lamp.

[0013] Preferably, the rear side of the positioning hook is fixedly connected with a spring, and the other end of the spring is fixedly connected to the inner wall of the installation groove.

[0014] Preferably, the rear side of the jaw frame is provided with a forehead sticker at the forehead position.

[0015] Preferably, the outer part of the rack plate is provided with an outer shell for protection when the rack plate moves out of the installation cavity.

[0016] Preferably, the front side of the computer optometry instrument is provided with a display screen, and the lower side control area of the computer optometry instrument is provided with a control handle.

[0017] Preferably, the turning piece and the mounting piece are installed and fixed by nuts, so that they can be quickly disassembled when the optometry disc and the mounting frame need to be disassembled and separated.

[0018] In summary, the present application has the following at least one beneficial technical effect: 1. The present application designs a lifting locking system comprising a rocker, a worm gear, a gear rack and an extension rod linkage cooperation at the bottom of the device. When the device moves to the designated position, the operator can move the installation plate upward by shaking the rocker, collect the moving wheels and make the device stably support on the ground, which effectively avoids the slight shaking of the device in the fine optometry process due to the existence of the casters, ensures the stability of the optical detection system, and thus ensures the reliability and accuracy of the measurement results. 2. The present application sets a chin support quick adjustment mechanism comprising a button, a movable rod, a positioning hook and a spring working together, so that the operator only needs to pull and release the button with simple actions, which can complete the unlocking, moving and locking of the chin support position. Compared with the traditional complicated knob or buckle adjustment mode, the operation process of adapting to different patient head shapes is greatly simplified, the patient's face diagnosis preparation time is effectively reduced, and the overall optometry work efficiency is improved. 3. The application achieves continuous and smooth adjustment of the diopter number in the range of -25D to +25D by replacing the traditional mechanical multi-lens combination with a liquid crystal zoom lens, solves the precision limitation problem caused by the discontinuity of lens diopter in traditional devices, and can accurately compensate the diopter, and at the same time, since there is no need to mechanically rotate and switch the lens, the noise in the optometry process is fundamentally eliminated, and the accuracy of optometry and the comfort experience of patients are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a front perspective structural schematic diagram of a new type of comprehensive optometry instrument according to an embodiment of the application; Figure 2 is a rear perspective structural schematic diagram of a new type of comprehensive optometry instrument according to an embodiment of the application; Figure 3 is a split schematic diagram of a head fixing structure of a new type of comprehensive optometry instrument according to an embodiment of the application; Figure 4 is Figure 3 is an enlarged view of A in FIG. 5; Figure 5 is a right side sectional view of a new type of comprehensive optometry instrument according to an embodiment of the application; Figure 6 is a left side sectional view of a new type of comprehensive optometry instrument according to an embodiment of the application; Figure 7 is a schematic diagram of a lifting structure of a moving wheel of a new type of comprehensive optometry instrument according to an embodiment of the application.

[0020] Explanation of reference signs: 1, workbench; 2, sliding table top; 3, computer optometry instrument; 4, display screen; 5, control handle; 6, lifting rod; 7, mounting bracket; 8, turning piece; 9, mounting piece; 10, nut; 11, optometry disc; 12, support rod; 13, remote vision chart; 14, illuminating lamp; 15, extension sleeve rod; 16, lens; 17, jaw bracket; 18, forehead sticker; 19, adjusting rod; 20, chin support; 21, positioning hole; 22, mounting groove; 23, movable rod; 24, key; 25, positioning hook; 26, spring; 27, lifting leg; 28, moving seat; 29, supporting leg; 30, rocker; 31, worm; 32, worm wheel; 33, connecting shaft; 34, gear; 35, rack plate; 36, telescopic rod; 37, mounting plate; 38, moving wheel; 39, limiting block; 40, limiting groove; 41, shell; 42, mounting cavity. DETAILED DESCRIPTION

[0021] The following will be described in detail below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 7 The application will be described in further detail.

[0022] Reference will be made to Figure 2 and Figures 5-7The utility model provides a new type comprehensive optometry appearance, including workbench 1, the upper right side of workbench 1 is installed with sliding platform 2, the upper sliding connection of sliding platform 2 is equipped with computer optometry appearance 3, the rear side of computer optometry appearance 3 is installed with lens 16, the rear side fixed connection of computer optometry appearance 3 is equipped with head fixed assembly, and the head fixed assembly is used for when using computer optometry appearance 3, the position of head is fixed to ensure that binocular lens 16 can clearly detect both eyes, and the bottom of workbench 1 is fixedly connected with lifting support leg 27, so that it can be adjusted in height according to the height requirement of patient or medical staff, so that workbench 1 is at a comfortable height for patient and medical staff to use, the bottom of lifting support leg 27 is fixedly connected with mobile seat 28, the bottom four corners of mobile seat 28 are all fixedly connected with supporting leg 29, when mobile wheel 38 is retracted, the stability of the whole equipment is effectively ensured, the outside four corners of supporting leg 29 are all installed with mobile wheel 38, when needing to move the equipment to change position or needing to maintain it, by pushing workbench 1, the equipment can be moved easily and conveniently under the action of mobile wheel 38, the upper fixed connection of mobile wheel 38 is equipped with mounting plate 37, the left and right sides in mobile seat 28 are all provided with installation cavity 42, the inside rotationally connected with lifting mechanism in left installation cavity 42, and the lifting mechanism includes worm 31, the top fixed connection of worm 31 is equipped with rocker 30, and worm 31 is engagedly connected with worm wheel 32, the inside fixed connection of worm wheel 32 is equipped with connecting shaft 33, the outside fixed connection of connecting shaft 33 is equipped with gear 34 on the right end, gear 34 is engagedly connected with rack plate 35, and rack plate 35 is fixedly connected on the upper right mounting plate 37, the upper fixed connection of right mounting plate 37 is equipped with telescopic rod 36, and the front and back of the side close to lifting support leg 27 are all fixedly connected with limiting assembly, and the limiting assembly is used for ensuring that mounting plate 37 keeps balance when driving mobile seat 28 to move up. The limiting assembly includes limiting block 39, and the limiting block 39 is fixedly connected on the front and back of the side close to mounting plate 37, and the lower part of installation cavity 42 is provided with the same number of limiting grooves 40 as the position of limiting block 39 on the side close to it, and the limiting block 39 is slidably connected in the inside of limiting groove 40, and the outside of rack plate 35 is installed with shell 41, and shell 41 is used for protecting when rack plate 35 moves out of installation cavity 42, to avoid that rack plate 35 is exposed to the outside environment, is damaged or impurity, dust enters installation cavity 42, to influence the normal use of internal parts, and the front side of computer optometry appearance 3 is installed with display screen 4, and display screen 4 is used for displaying measurement results when detecting eyes, and the lower control area of computer optometry appearance 3 is installed with control handle 5, and control handle 5 is used for moving computer optometry appearance 3 on sliding platform 2, to adjust the position and make it align with eyes.

[0023] In order to ensure the stability of the device in use, when the device is moved to the required position, the rocker 30 is shaken, the worm 31 is driven to rotate, the worm gear 32 is connected with the worm 31 and is driven to rotate together, and the connecting shaft 33 is connected with the gear 34, so that the gear 34 is driven to rotate when the worm gear 32 rotates, the rack plate 35 is driven to move up due to the meshing connection with the gear 34, and the installation plate 37 is driven to separate the moving wheel 38 from the ground, and the installation plate 37 is balanced and supported by the extension rod 36 on the left side of the installation plate 37, so that the installation plate 37 is uniformly stressed and stable during lifting, the limiting block 39 slides in the limiting groove 40, and the moving wheel 38 is lifted and collected when the installation plate 37 moves up in the installation cavity 42, so that the stability of the moving wheel 38 is ensured, and the possibility of transverse deviation or inclination of the installation plate 37 during lifting is avoided, so that the moving wheel 38 is collected when the device is moved out of the required position, and the stability of the device in use is effectively ensured, and the detection effect is not affected by the movement of the device in use.

[0024] Reference Figures 2-4 The head fixing assembly comprises a jaw frame 17 fixedly connected to the rear side of the sliding table top 2, an installation slot 22 is formed in the inner bottom of the jaw frame 17, an adjusting rod 19 is slidably connected in the installation slot 22, a chin support 20 is fixedly connected to the upper part of the adjusting rod 19, a movable rod 23 is slidably connected in the installation slot 22, a button 24 is fixedly connected to the rear end of the movable rod 23, a positioning hook 25 is fixedly connected to the front end of the movable rod 23, positioning holes 21 are uniformly distributed on one side of the adjusting rod 19, the positioning hook 25 is clamped and connected in the positioning hole 21, a spring 26 is fixedly connected to the rear side of the positioning hook 25, and the other end of the spring 26 is fixedly connected to the inner wall of the installation slot 22; the forehead sticker 18 is installed at the forehead position on the rear side of the jaw frame 17.

[0025] Because the head size of each person is different, when using the computer optometry instrument 3, the position of the chin support 20 needs to be adjusted so that the eyes of the patient can be aligned with the lens 16, ensuring that the pupils can be fully illuminated during detection. By pulling the button 24, the movable rod 23 is pulled, and the positioning hook 25 is pulled out of the positioning hole 21, so that the position of the adjusting rod 19 is no longer positioned, and when the positioning hook 25 is pulled to move, the spring 26 is squeezed to store energy and generate a rebound force. When the position adjustment of the chin support 20 is completed, the button 24 is released, and the positioning hook 25 is pushed by the rebound force of the spring 26, so that it is reinserted into the inside of the positioning hole 21 to position the position of the adjusting rod 19 after adjustment. The position of the chin support 20 is quickly and conveniently adjusted, reducing the patient's face diagnosis time, greatly simplifying the adjustment operation, shortening the preparation time required by the equipment for individual adaptation for different patients, thereby improving the continuity and work efficiency of the overall detection process.

[0026] Reference Figures 1-2 The upper left side of the workbench 1 is fixedly connected with a lifting rod 6, so that the height of the optometry disc 11, the remote control visual chart 13 and the illuminating lamp 14 can be adjusted as needed. The telescopic end of the lifting rod 6 is fixedly connected with a mounting bracket 7, one end of the mounting bracket 7 is internally mounted with a turning piece 8, one end of the turning piece 8 is internally mounted with a mounting piece 9, and the bottom end of the mounting piece 9 is threadedly connected with the optometry disc 11. The upper side of the mounting bracket 7 is provided with a supporting rod 12, one end of the supporting rod 12 is rotatably connected with the remote control visual chart 13, and the extension end of the lifting rod 6 is fixedly connected with an illuminating assembly; the illuminating assembly comprises an extension sleeve rod 15 fixedly connected to the extension end of the lifting rod 6, and the extension sleeve rod 15 is fixedly connected with the illuminating lamp 14 at one end. The connecting rod of the illuminating lamp 14 is connected with the extension sleeve rod 15, so that when the height of the optometry disc 11 and the remote control visual chart 13 is adjusted to the required height, the height of the illuminating lamp 14 is too high and needs to be adjusted and reduced. Only the extension sleeve rod 15 needs to be pulled, and the extension sleeve rod 15 can be bent according to the position pulled by the operator to meet the height adjustment requirement of the illuminating lamp 14. The optometry disc 11 and the remote control visual chart 13; the turning piece 8 and the mounting piece 9 are installed and fixed by the nut 10, so that when the optometry disc 11 is separated from the mounting bracket 7, it can be quickly disassembled.

[0027] The patient is preliminarily detected by the remote control visual chart 13, so that the sensitivity baseline data of the patient in the unaided correction state can be quickly obtained, and important reference basis is provided for subsequent instrument optometry. Then, the computer optometry instrument 3 is used to detect the patient's eyes. The patient aligns the head to the jaw frame 17, places the chin on the chin support 20, and makes the forehead adhere to the forehead pad 18. The forehead pad 18 not only plays a guiding and positioning role, but also provides flexible protection for the forehead of the patient, avoiding bumps that may occur during device interaction. Accurate head positioning ensures that the pupil center of the patient can be accurately aligned with the main shaft of the optical system inside the device, thereby obtaining accurate measurement data. When the patient is positioned, the computer optometry instrument 3 starts to measure the refractive state of the eyes. After the computer optometry instrument 3 completes the detection of the eyes, in order to ensure accuracy, the optometry disc 11 is used to detect the eyes again. Light is emitted by the light source module, focused by the lens group, and projected to the patient's eyes through the reflector. The reflected light signal is received by the sensor and transmitted to the processor. The processor calculates the refractive error, astigmatism and other parameters, and the results are displayed on the touch screen. The motor drives the lens group and the reflector to adjust the position to adapt to the pupil distance and refractive error range of different patients, effectively ensuring the accuracy of eye detection, and the light emitted by the extension sleeve 15 can irradiate the eyes with a specific intensity. By comparing and analyzing the physiological responses and morphological differences of the eyes in the light-irradiated and non-light-irradiated states, more dimensional clinical information can be provided to doctors. This comparative observation enables doctors to better evaluate the health status of the eyes and make more comprehensive and accurate diagnoses of the patient's condition.

[0028] The optometry disc 11 in the device replaces the multi-lens combination mode with liquid crystal zoom lenses. The transmittance of the liquid crystal zoom lens is good, and a single liquid crystal zoom lens can realize positive and negative refractive power adjustment. Large refractive power can be achieved by combining two liquid crystal zoom lenses, realizing a zoom range of -25D to +25D. The lens size is Φ20mm. The use of liquid crystal zoom lenses solves the noise problem and realizes continuous change of refractive power. It can adapt to the current market 5° lens or even smaller refractive resolution lens optometry requirements, and can accurately adjust the refractive power. Due to machining and assembly errors, the actual refractive power of existing products differs from the theoretical value and cannot be compensated.

[0029] The difference between unpolarized light and polarized light is based on whether it can be applied to two different ways of polarized light and unpolarized light. Unpolarized light is the direction of vibration of light waves uniformly distributed in all directions, usually from natural light sources. Such as sunlight, polarized light is the direction of vibration of light waves limited to a certain direction, and light only vibrates in a plane. Polarized light can be generated from unpolarized light through specific media such as polarizers or reflection, refraction, etc. In electromagnetic waves, the electric field of polarized light oscillates in one direction, while the electric field of unpolarized light oscillates in all directions.

[0030] The basic principle of liquid crystal zoom lens is to change the refractive index of light by controlling the arrangement of liquid crystal molecules, thereby realizing the adjustment of focal length. Specifically, a liquid crystal lens is usually composed of upper and lower glass substrates, a liquid crystal layer and electrodes. By applying voltage, the arrangement direction of liquid crystal molecules will change, resulting in different effective refractive indices from the center to the edge of the lens, thereby realizing the refraction of light and the change of focal length.

Claims

1. A novel comprehensive optometry instrument, comprising a worktable (1), characterized in that, A sliding table (2) is installed on the upper right side of the workbench (1). A computer refractometer (3) is slidably connected to the upper part of the sliding table (2). A lens (16) is installed on the rear side of the computer refractometer (3). A head fixing component is fixedly connected to the rear side of the computer refractometer (3). The head fixing component is used to fix the position of the head when using the computer refractometer (3) to ensure that the binocular lenses (16) can clearly detect both eyes. A lifting leg (27) is fixedly connected to the bottom of the workbench (1). A movable seat (28) is fixedly connected to the bottom of the lifting leg (27). A foot (29) is fixedly connected to the four corners of the bottom of the movable seat (28). A movable wheel (38) is installed on the four outer corners of the foot (29). A mounting plate (37) is fixedly connected to the upper part of the movable wheel (38). The inner part of the movable seat (28) is fixedly connected to the mounting plate (37). The mounting plate has mounting cavities (42) on both the left and right sides. A lifting mechanism is rotatably connected inside the mounting cavity (42) on the left side. The lifting mechanism includes a worm gear (31). A rocker arm (30) is fixedly connected to the top of the worm gear (31). A worm wheel (32) is meshed with the worm gear (31). A connecting shaft (33) is fixedly connected inside the worm wheel (32). A gear (34) is fixedly connected to the outside of the right end of the connecting shaft (33). A rack plate (35) is meshed with the gear (34). The rack plate (35) is fixedly connected to the upper part of the mounting plate (37) on the right side. A telescopic rod (36) is fixedly connected to the upper part of the mounting plate (37) on the right side. Limiting components are fixedly connected to the front and back of the lifting legs (27) on the side closest to each other. The limiting components are used to ensure that the mounting plate (37) maintains balance when it drives the moving seat (28) to move upward.

2. The novel comprehensive optometry instrument according to claim 1, characterized in that, The head fixing assembly includes a jaw frame (17), which is fixedly connected to the rear side of the sliding platform (2). The jaw frame (17) has an installation groove (22) at the bottom of its inner side. An adjustment rod (19) is slidably connected inside the installation groove (22). A chin rest (20) is fixedly connected to the upper part of the adjustment rod (19). A movable rod (23) is slidably connected inside the installation groove (22). A button (24) is fixedly connected to the rear end of the movable rod (23). A positioning hook (25) is fixedly connected to the front end of the movable rod (23). A uniformly distributed positioning hole (21) is opened on one side of the adjustment rod (19). The positioning hook (25) is engaged inside the positioning hole (21).

3. The novel comprehensive optometry instrument according to claim 1, characterized in that, A lifting rod (6) is fixedly connected to the upper left side of the workbench (1). A mounting bracket (7) is fixedly connected to the telescopic end of the lifting rod (6). A steering component (8) is installed inside one end of the mounting bracket (7). A mounting component (9) is installed inside one end of the steering component (8). A test disc (11) is threaded to the bottom end of the mounting component (9). A support rod (12) is installed on the upper side of the mounting bracket (7). A remote control vision chart (13) is rotatably connected to one end of the support rod (12). A lighting component is fixedly connected to the top of the extension end of the lifting rod (6).

4. A novel comprehensive optometer according to claim 1, characterized in that, The limiting component includes a limiting block (39), which is fixedly connected to the front and back of the mounting plate (37) on the side closest to it. The lower part of the mounting cavity (42) is provided with limiting grooves (40) of the same number as the limiting block (39) on the side closest to it. The limiting block (39) is slidably connected inside the limiting groove (40).

5. A novel comprehensive optometer according to claim 3, characterized in that, The lighting assembly includes an extension sleeve (15), which is fixedly connected to the top of the extension end of the lifting rod (6), and a lighting lamp (14) is fixedly connected to one end of the extension sleeve (15).

6. A novel comprehensive optometer according to claim 2, characterized in that, A spring (26) is fixedly connected to the rear side of the positioning hook (25), and the other end of the spring (26) is fixedly connected to the inner wall of the mounting groove (22).

7. A novel comprehensive optometer according to claim 2, characterized in that, A forehead patch (18) is installed on the rear side of the jaw frame (17) at the forehead position.

8. A novel comprehensive optometer according to claim 1, characterized in that, The rack plate (35) is fitted with a housing (41) which is used to protect the rack plate (35) after it is removed from the mounting cavity (42).

9. A novel comprehensive optometer according to claim 1, characterized in that, The computer refractometer (3) has a display screen (4) installed on the front side and a control handle (5) installed on the lower control area of ​​the computer refractometer (3).

10. A novel comprehensive optometer according to claim 3, characterized in that, Both the steering component (8) and the mounting component (9) are installed and fixed by nuts (10) so that they can be quickly disassembled when the test disc (11) needs to be separated from the mounting bracket (7).

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