Ophthalmic optometry device

Abstract

The utility model discloses ophthalmology optometry equipment which comprises an equipment body and an optometry assembly, and an installation cavity is formed in the equipment body. The optometry assembly is mounted in the mounting cavity and comprises a light source, a reflector and a zoom lens, the light source is used for emitting inspection light, the reflector is used for reflecting the inspection light, and the zoom lens is used for focusing the inspection light to irradiate the fundus of the human body; the zoom lens comprises a lens frame, two elastic concave lenses, filling liquid and a sealing piece, the lens frame comprises a supporting piece and an annular connecting frame, through the scheme, the zoom lens can be focused, the diopter of the zoom lens is changed by extracting the filling liquid in the hydraulic cavity or injecting additional filling liquid into the hydraulic cavity in a pressurized mode, and therefore the zoom lens can be used for focusing the lens. An assembler can properly adjust the volume of the filling liquid in the hydraulic cavity according to the focusing deviation value of the ophthalmology department optometry equipment, operation is convenient and fast, and the optometry quality of the ophthalmology department optometry equipment can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ophthalmic technology field especially relates to an ophthalmic optometry equipment. BACKGROUND

[0002] Ophthalmic optometry equipment is an important medical equipment, is used for shooting the image of the fundus structure such as retina, optic nerve, blood vessel and choroid of eye. These images are crucial for diagnosing and monitoring various ophthalmic diseases. Ophthalmic optometry equipment is usually based on optical imaging technology, using specific lenses and illumination system to capture the image of fundus. It can provide detailed view of retina, help doctors to assess the condition and develop treatment plan.

[0003] Ophthalmic optometry equipment is provided with multifocal lens, in the design process of ophthalmic optometry equipment, the diopter of lens and the distance between adjacent light guide elements in the same optical path as lens need to be considered comprehensively, but in the production process, due to the error of machining and assembly, the diopter of lens and the distance between adjacent light guide elements often cannot reach the ideal matching degree, which affects the optometry quality. SUMMARY

[0004] The main purpose of the utility model is to provide an ophthalmic optometry equipment, which aims to realize the focusing of the lens in the ophthalmic optometry equipment.

[0005] To achieve the above purpose, the utility model provides an ophthalmic optometry equipment, comprising:

[0006] The device main body is provided with an installation cavity in the device main body;

[0007] The optometry assembly is installed in the installation cavity, and the optometry assembly comprises a light source, a reflector and a zoom lens, the light source is used for emitting examination light, the reflector is used for reflecting examination light, and the zoom lens is used for focusing examination light to irradiate human fundus;

[0008] The zoom lens comprises a mirror frame, two elastic concave mirror lenses, a filling liquid and a sealing element, the mirror frame comprises a support and an annular connecting frame, one end of the support is connected to the cavity wall of the installation cavity, and the other end is connected to the annular connecting frame;

[0009] Two elastic concave mirror lenses are connected to the axial two sides of the annular connecting frame, the periphery of two elastic concave mirror lenses is attached to the periphery of the annular connecting frame, two elastic concave mirror lenses are concave towards the direction of approaching, two elastic concave mirror lenses and the annular connecting frame form a hydraulic chamber, and the annular connecting frame is provided with a liquid injection hole communicating with the hydraulic chamber;

[0010] The filling liquid is a transparent liquid and is filled in the hydraulic chamber;

[0011] The sealing member is installed on the liquid injection hole to seal the hydraulic cavity.

[0012] In some embodiments of the present application, the filling liquid is water or silicone oil.

[0013] In some embodiments of the present application, the material of the elastic concave lens is polycarbonate, polyamide or resin.

[0014] In some embodiments of the present application, the thickness of the elastic concave lens is greater than or equal to 0.75mm and less than or equal to 2mm.

[0015] In some embodiments of the present application, the width of the annular connecting frame in the axial direction is greater than or equal to 1.25mm and less than or equal to 4mm.

[0016] In some embodiments of the present application, the sealing member is a sealing plug, which is inserted into the liquid injection hole.

[0017] In some embodiments of the present application, the sealing plug is provided with a slit, which penetrates from one end face to the other end face of the sealing plug.

[0018] In some embodiments of the present application, the outer end face of the sealing plug is concavely provided with a tapered positioning groove, and the slit is formed in the groove wall of the tapered positioning groove.

[0019] In some embodiments of the present application, the slit is provided in a cross shape.

[0020] In some embodiments of the present application, the material of the sealing member is rubber or polyurethane.

[0021] Through the above scheme, when the focusing deviation problem is detected after the ophthalmic optometry equipment is assembled, the focusing of the variable focus lens can be adjusted, the filling liquid in the hydraulic cavity is extracted, or additional filling liquid is pressurized and injected into the hydraulic cavity, so that the diopter of the variable focus lens changes, and the assembler can appropriately adjust the volume of the filling liquid in the hydraulic cavity according to the focusing deviation of the ophthalmic optometry equipment. It is convenient to operate, and the optometry quality of the ophthalmic optometry equipment can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without creating any creative labor.

[0023] Figure 1 A structure schematic view of one embodiment of the ophthalmic refraction equipment provided by the present application;

[0024] Figure 2 A sectional view of one embodiment of the ophthalmic refraction equipment provided by the present application;

[0025] Figure 3 A structure schematic view of one embodiment of the zoom lens in the present application;

[0026] Figure 4 A sectional view of one embodiment of the zoom lens in the present application;

[0027] Figure 5 A structure schematic view of one embodiment of the sealing plug in the present application;

[0028] Figure 6 A sectional view of one embodiment of the sealing plug in the present application.

[0029] Explanation of the reference signs:

[0030] 100, ophthalmic refraction equipment; 11, equipment main body; 111, installation cavity; 112, refraction assembly; 12, zoom lens; 120, hydraulic cavity; 121, mirror frame; 1212, annular connecting frame; 1213, liquid injection hole; 122, elastic concave mirror piece; 123, filling liquid; 124, sealing element; 1242, insertion gap; 1243, conical positioning groove; 13, light source; 14, reflecting mirror.

[0031] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0034] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0035] Please refer to Figures 1 to 6 The utility model proposes a kind of ophthalmic optometry equipment 100, comprising: equipment main body 11, optometry component 112, wherein, equipment main body 11 is equipped with mounting cavity 111;Optometry component 112 is installed in mounting cavity 111, optometry component 112 includes light source 13, reflector and zoom lens 12, light source 13 is used to emit inspection light, reflector is used to reflect inspection light, and zoom lens 12 is used to focus on inspection light, to irradiate human fundus;Zoom lens 12 includes mirror frame 121, two elastic concave mirror pieces 122, filling liquid 123 and sealing element 124, mirror frame 121 includes support and annular connecting frame 1212, support one end connects the cavity wall of mounting cavity 111, the other end connects annular connecting frame 1212;Two elastic concave mirror pieces 122 are connected to the axial two sides of annular connecting frame 1212, the circumference of two elastic concave mirror pieces 122 and the circumference of annular connecting frame 1212 are attached, two elastic concave mirror pieces 122 are concave to the direction of approaching, and two elastic concave mirror pieces 122 and annular connecting frame 1212 form hydraulic chamber 120 by enclosing, and annular connecting frame 1212 is provided with injection hole 1213 that communicates with hydraulic chamber 120;Filling liquid 123 is transparent liquid, and is filled in hydraulic chamber 120;Sealing element 124 is installed in injection hole 1213, to seal hydraulic chamber 120.

[0036] By the above scheme, when there is focusing deviation problem in ophthalmic optometry equipment 100 assembly is completed, the focusing of zoom lens 12 can be adjusted, by extracting filling liquid 123 in hydraulic chamber 120, or additional filling liquid 123 is pressurized and injected into hydraulic chamber 120, so that the diopter of zoom lens 12 changes, and the assembler can adjust the volume of filling liquid 123 in hydraulic chamber 120 according to the focusing deviation of ophthalmic optometry equipment 100, convenient to operate, can effectively improve the optometry quality of ophthalmic optometry equipment 100.

[0037] The support is generally in the shape of a rod and made of metal such as stainless steel or aluminum alloy to provide high strength and durability, or made of plastic, which is not specifically limited here.

[0038] The two elastic concave lens 122 and the filling liquid 123 are transparent to ensure that light can pass through without obstruction and maintain the clarity of the image. The refractive index of the filling liquid 123 should be stable to ensure that the change in the refractive power of the lens is predictable and consistent and has good chemical stability. In some embodiments of the present application, the filling liquid 123 is water or silicone oil. Water is extremely low in cost, and although silicone oil is relatively high in cost, both of these materials are relatively economical overall. Both water and silicone oil have good transparency, which can ensure that light passing through the zoom lens 12 will not be significantly scattered or absorbed, maintaining the clarity of the image. Water and silicone oil can remain stable under different environmental conditions and are not easily affected by temperature and humidity.

[0039] In some embodiments of the present application, the material of the elastic concave lens 122 is polycarbonate, polyamide or resin. Polycarbonate, polyamide and resin all have good optical transparency, which can also ensure that the light transmittance is high when light passes through the lens, reducing light loss and ensuring image clarity. These materials have a certain elasticity, so that the elastic concave lens 122 can produce the expected deformation when subjected to pressure changes in the hydraulic chamber 120, thereby achieving the zoom function. Polycarbonate and polyamide have high wear resistance and impact resistance, which is beneficial to prolong the service life of the lens. In addition, resin material is easy to process and can be molded into a precise concave shape according to design requirements. Polycarbonate and polyamide also have good processing performance and are convenient for mass production.

[0040] Further, in some embodiments of the present application, the thickness of the elastic concave lens 122 is greater than or equal to 0.75 mm and less than or equal to 2 mm. Specifically, it can be 0.75 mm, 0.9 mm, 1.0 mm, 1.25 mm, 1.5 mm, 2.0 mm, etc. This can not only ensure that the lens has sufficient structural strength so that it can withstand certain external forces without deformation or damage, but also make the elastic properties of the material fully play.

[0041] Similarly, in some embodiments of the utility model, the width of annular connecting frame 1212 in the axial direction is greater than or equal to 1.25 mm and less than or equal to 4 mm. Specifically, it can be 1.25 mm, 1.9 mm, 2.0 mm, 2.25 mm, 3.5 mm, 4 mm, etc. On the one hand, it can ensure the structural strength of the annular connecting frame 1212, and on the other hand, the width of the annular connecting frame 1212 affects the shape and volume of the hydraulic cavity 120, thereby affecting the pressure distribution of the filling liquid 123. The above width range is appropriate, which can ensure that the pressure in the hydraulic cavity 120 is evenly distributed, so that the elastic concave mirror lens 122 can be uniformly bent.

[0042] The sealing element 124 can be a sealing screw, which is threadedly connected with the liquid injection hole 1213 and realizes sealing. In some embodiments of the utility model, the sealing element 124 is a sealing plug, which is inserted into the liquid injection hole 1213. The sealing plug is simple and reliable, easy to install and replace, and can tightly fit with the hole wall of the liquid injection hole 1213 to provide good sealing effect, prevent air from entering and liquid from leaking, and prevent the filling liquid 123 in the hydraulic cavity 120 from leaking.

[0043] In some embodiments of the utility model, the sealing plug is provided with a slit 1242, which penetrates from one end face to the other end face of the sealing plug. The presence of the slit 1242 allows the sealing plug to be easily inserted or pulled out of the liquid injection hole 1213 by a tool (such as a thin metal wire or a special pulling tool), facilitating the installation and disassembly process of the sealing plug.

[0044] Through the above scheme, the injection tool can also be directly inserted into the slit 1242 for injection or liquid extraction. Further, in some embodiments of the utility model, the outer end face of the sealing plug is recessed with a tapered positioning groove 1243, and the slit 1242 is formed in the groove wall of the tapered positioning groove 1243. This facilitates the alignment of the insertion tool.

[0045] In some embodiments of the utility model, the slit 1242 is in the shape of a cross. In this way, the resistance to tool insertion can be reduced without affecting the sealing performance, making the liquid injection process more convenient and efficient.

[0046] In some embodiments of the utility model, the material of the sealing element 124 is rubber or polyurethane. Both rubber and polyurethane have good elasticity and softness, can tightly fit with the inner wall of the liquid injection hole 1213, and provide high sealing effect to prevent the filling liquid 123 from leaking. Moreover, both materials have good chemical stability and are not prone to chemical reaction with the filling liquid 123, ensuring the safety and reliability of long-term use.

[0047] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. An ophthalmic refraction device (100), characterized in that, The device comprises: a device body (11) with a mounting cavity (111) inside; an optometry assembly (112) mounted in the mounting cavity (111), the optometry assembly (112) comprising a light source (13) for emitting examination light, a mirror (14) for reflecting the examination light, and a zoom lens (12) for focusing the examination light to irradiate the human fundus; the zoom lens (12) comprises a lens frame (121), two elastic concave lens pieces (122), a filling liquid (123), and a sealing piece (124), the lens frame (121) comprising a support and an annular connecting frame (1212), one end of the support being connected to the cavity wall of the mounting cavity (111) and the other end being connected to the annular connecting frame (1212); the two elastic concave lens pieces (122) are respectively connected to the axial two sides of the annular connecting frame (1212), the peripheries of the two elastic concave lens pieces (122) are attached to the periphery of the annular connecting frame (1212), the two elastic concave lens pieces (122) are concave towards the direction of approaching each other, and the two elastic concave lens pieces (122) and the annular connecting frame (1212) enclose a hydraulic cavity (120), the annular connecting frame (1212) being provided with a liquid injection hole communicating with the hydraulic cavity; the filling liquid (123) is a transparent liquid and is filled in the hydraulic cavity (120); the sealing piece (124) is mounted in the liquid injection hole (1213) to seal the hydraulic cavity (120).

2. The ophthalmic refractometry device (100) according to claim 1, characterized in that The filling liquid (123) is water or silicone oil.

3. The ophthalmic refraction device (100) of claim 1, characterized in that The material of the elastic concave lens piece (122) is polycarbonate, polyamide, or resin.

4. The ophthalmic refraction device (100) of claim 1, characterized in that The thickness of the elastic concave lens piece (122) is greater than or equal to 0.75 mm and less than or equal to 2 mm.

5. The ophthalmic refraction device (100) of claim 1, characterized in that The width of the annular connecting frame (1212) in the axial direction is greater than or equal to 1.25 mm and less than or equal to 4 mm.

6. An ophthalmic refractometry device (100) according to any one of claims 1 to 5, characterized in that, The sealing piece (124) is a sealing plug which is inserted into the liquid injection hole (1213).

7. An ophthalmic phoropter (100) as claimed in claim 6, characterized in that The sealing plug is provided with a slit (1242) which penetrates from one end surface to the other end surface of the sealing plug.

8. An ophthalmic phoropter (100) as claimed in claim 7, characterized in that, The outer end surface of the sealing plug is concave with a tapered positioning groove (1243), and the slit (1242) is formed in the groove wall of the tapered positioning groove (1243).

9. The ophthalmic phoropter (100) of claim 7, wherein, The slit (1242) is in the shape of a cross.

10. The ophthalmic refraction device (100) of claim 6, characterized in that, The material of the sealing piece (124) is rubber or polyurethane.

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