Laser diagnosis cornea contact device

Abstract

The utility model discloses a laser diagnosis cornea contact device, which comprises a main body, a laser source, a laser source and a laser source, the protective cover is arranged on the peripheral surface of the objective lens structural member in a sleeving manner, and the protective cover is provided with a second annular groove; and the flexible part is arranged in the first annular groove, and the flexible part is in interference fit with the groove wall of the second annular groove. The laser diagnosis cornea contact device can effectively avoid shaking between the protective cover and the objective lens structural member.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic medical equipment technology, and in particular to a laser diagnostic corneal contact device. Background Technology

[0002] In related technologies, when using a confocal ophthalmic laser diagnostic corneal contact device for eye tissue examination, in order to maintain a certain depth of focus of the objective lens structure and improve the positioning accuracy and stability of the corneal examination area, a light-transmitting protective shield needs to be placed in front of the cornea and within a certain distance of the objective lens structure of the device. The plane of this protective shield is coaxial with the objective lens structure and is tangential to the corneal curvature and in continuous contact to maintain a relatively fixed distance between the eye tissues during the examination, thereby enabling tomographic scanning. At the same time, it can generate a bright reflection at the tangent point to indicate the position of the human eye and guide the operator to examine different areas.

[0003] When the existing light-transmitting protective cover is installed on the laser diagnostic corneal contact device, the connection between the light-transmitting protective cover and the laser diagnostic corneal contact device is unstable. As a result, the light-transmitting protective cover will shake relative to the lens, which will cause changes in the depth of focus and field of view of the objective lens structure when scanning eye tissue, thus affecting the accuracy of obtaining tomographic information of eye tissue. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a laser diagnostic corneal contact device that can effectively prevent movement between the protective cover and the objective lens structure.

[0005] A laser diagnostic corneal contact device according to an embodiment of the present invention includes:

[0006] The main body includes an objective lens structure, and the outer peripheral surface of the objective lens structure is provided with a first annular groove;

[0007] A protective cover is fitted onto the outer peripheral surface of the objective lens structure, and the protective cover is provided with a second annular groove.

[0008] A flexible component is disposed in the first annular groove, and the flexible component is interference-fitted with the groove wall of the second annular groove.

[0009] The laser diagnostic corneal contact device according to an embodiment of the present invention has at least the following beneficial effects: a first annular groove is provided on the outer peripheral surface of the objective lens structure, a second annular groove is provided on the protective cover, and a flexible member is disposed in the first annular groove, with the flexible member and the groove wall of the second annular groove being interference-fitted. Thus, after the interference fit between the flexible member and the second annular groove, the connection between the protective cover and the objective lens structure is relatively stable, effectively preventing movement between the protective cover and the objective lens structure. Specifically, the laser diagnostic corneal contact device can effectively prevent movement between the protective cover and the objective lens structure.

[0010] According to some embodiments of the present invention, in the laser diagnostic corneal contact device, the second annular groove includes a plurality of limiting grooves, which are distributed circumferentially along the protective cover.

[0011] According to some embodiments of the laser diagnostic corneal contact device of the present invention, the objective lens structure is provided with a first matching part, the protective cover includes a main body part and a protective part, the protective part has a trapezoidal cross-section, the main body part is connected to the protective part, the main body part is sleeved on the outer peripheral surface of the objective lens structure, the main body part is provided with a second matching part, the objective lens structure and the protective cover have a first state and a second state. When the objective lens structure and the protective cover are in the first state, the first matching part is not connected to the second matching part. When the objective lens structure and the protective cover are in the second state, the first matching part abuts against the second matching part, the protective part abuts against the objective lens structure, and the protective cover is rotated to switch the objective lens structure and the protective cover between the first state and the second state.

[0012] According to some embodiments of the present invention, the laser diagnostic corneal contact device includes a body part and a first matching part. The first matching part is connected to the body part and protrudes relative to the body part. The second matching part is provided with a groove, the groove wall of which extends along the axial direction of the objective lens component. When the objective lens component and the protective cover are in the second state, the first matching part is disposed in the groove.

[0013] According to some embodiments of the present invention, the laser diagnostic corneal contact device has multiple first matching parts and multiple grooves, with each first matching part disposed in one groove.

[0014] According to some embodiments of the present invention, in the laser diagnostic corneal contact device, the second matching part is provided with an inclined surface, and the first matching part is provided with an arc-shaped surface. When the protective cover is rotated, the inclined surface abuts against the arc-shaped surface, so that the objective lens structure and the protective cover switch from the first state to the second state.

[0015] According to some embodiments of the present invention, the laser diagnostic corneal contact device has multiple first matching parts and multiple second matching parts.

[0016] According to some embodiments of the present invention, the main body and the protective part of the laser diagnostic corneal contact device are an integral structure.

[0017] According to some embodiments of the laser diagnostic corneal contact device of the present invention, the objective lens structure is provided with a first matching part, the main body is provided with a second matching part, the objective lens structure and the protective cover have a first state and a second state. When the objective lens structure and the protective cover are in the first state, the first matching part is not connected to the second matching part. When the objective lens structure and the protective cover are in the second state, the first matching part abuts against the second matching part. The protective cover is rotated to switch the objective lens structure and the protective cover between the first state and the second state.

[0018] According to some embodiments of the laser diagnostic corneal contact device of the present invention, the second matching portion includes a first end and a second end, and the height of the second matching portion gradually increases from the first end to the second end; or, the first matching portion includes a first end and a second end, and the height of the first matching portion gradually increases from the first end to the second end.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of a laser diagnostic corneal contact device according to some embodiments of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of the laser diagnostic corneal contact device according to the first embodiment of this utility model;

[0023] Figure 3 This is a cross-sectional schematic diagram of the laser diagnostic corneal contact device according to the second embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the objective lens structure in a laser diagnostic corneal contact device according to some embodiments of the present invention;

[0025] Figure 5This is a schematic diagram of the protective cover in the laser diagnostic corneal contact device according to some embodiments of the present invention;

[0026] Figure 6 This is a cross-sectional schematic diagram of the protective cover in the laser diagnostic corneal contact device according to some embodiments of the present invention.

[0027] Figure label:

[0028] Laser diagnostic corneal contact device 10, objective lens structure 100, first annular groove 110, first matching part 120, arc surface 130, protective cover 200, second annular groove 210, limiting groove 211, main body part 220, second matching part 230, groove 240, inclined surface 250, protective part 260, flexible part 300. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] In related technologies, when using a confocal ophthalmic laser diagnostic corneal contact device to examine eye tissues, in order to maintain a certain depth of focus of the objective lens 100 and improve the positioning accuracy and stability of the corneal examination area, a light-transmitting protective shield 200 needs to be placed in front of the cornea and at a certain distance from the objective lens 100. The plane of the protective shield 200 is coaxial with the objective lens 100 and continuously in contact with the corneal curvature to keep the distance of the eye tissues relatively fixed during the examination, thereby enabling tomographic scanning. At the same time, it can generate a bright reflection at the tangent point to indicate the position of the human eye and guide the operator to examine different areas.

[0035] When the existing light-transmitting protective cover 200 is installed on the laser diagnostic corneal contact device 10, the connection between the light-transmitting protective cover 200 and the laser diagnostic corneal contact device 10 is unstable. Therefore, the light-transmitting protective cover 200 will wobble relative to the lens, which will cause changes in the depth of focus and field of view of the objective lens structure 100 when scanning eye tissue, affecting the accuracy of acquiring tomographic information of eye tissue. To address this, this application proposes a laser diagnostic corneal contact device 10.

[0036] Please refer to Figures 1 to 6 In some embodiments, the laser diagnostic corneal contact device 10 includes a main body, a protective cover 200, and a flexible member 300. The main body includes an objective lens structure 100, the outer peripheral surface of which is provided with a first annular groove 110. The objective lens structure 100 may be an objective lens structure 100 of a microscope. The objective lens structure 100 may be cylindrical in shape, and the first annular groove 110 is provided on the outer peripheral surface of the objective lens structure 100. The protective cover 200 is fitted onto the outer peripheral surface of the objective lens structure 100, and the protective cover 200 is provided with a second annular groove 210. The flexible member 300 is disposed in the first annular groove 110, and the flexible member 300 is interference-fitted with the groove wall of the second annular groove 210. Please refer to... Figure 2Specifically, the outer peripheral surface of the objective lens structure 100 is provided with a first annular groove 110, the protective cover 200 is provided with a second annular groove 210, and the flexible member 300 is disposed in the first annular groove 110, with the flexible member 300 and the groove wall of the second annular groove 210 being interference-fitted. Thus, after the flexible member 300 and the second annular groove 210 are interference-fitted, the connection between the protective cover 200 and the objective lens structure 100 is relatively stable, effectively preventing wobbling between them. Specifically, the laser diagnostic corneal contact device 10 can effectively prevent wobbling between the protective cover 200 and the objective lens structure 100. Furthermore, the protective cover 200 and the objective lens structure 100 are easy to install and operate.

[0037] Specifically, the interference fit between the flexible element 300 and the wall of the second annular groove 210 means that the flexible element 300 is circular in shape, and its diameter is larger than the diameter of the second annular groove 210. During the installation of the main body and the protective cover 200, the protective cover 200 compresses the flexible element 300, causing it to deform. The flexible element 300 then rests within the second annular groove 210, with the walls of the flexible element 300 and the second annular groove 210 abutting against each other. It should be noted that when installing the protective cover 200 onto the objective lens structure 100, the fit between the flexible element 300 and the second annular groove 210 also serves as a reminder that the installation is complete, thus facilitating confirmation that the protective cover 200 is properly installed onto the objective lens structure 100.

[0038] Furthermore, the second annular groove 210 can be configured in various ways. For example, the second annular groove 210 can be a continuous groove, or it can be a discontinuous groove formed by multiple grooves. When the second annular groove 210 is a discontinuous groove, the interference fit between the flexible member 300 and the groove wall of the second annular groove 210 can be further improved, thereby effectively preventing the objective lens structure 100 from wobbling relative to the protective cover 200. For example, please refer to... Figure 6 In some embodiments, the second annular groove 210 includes a plurality of limiting grooves 211, which may be three, four, or ten limiting grooves 211. The plurality of limiting grooves 211 are distributed at intervals along the circumference of the protective cover 200. The shape of the limiting grooves 211 may be triangular, square, or circular, and is not specifically limited here.

[0039] Further, please refer to Figures 2 to 6In some embodiments, the objective lens structure 100 is provided with a first mating portion 120, and the protective cover 200 includes a main body portion 220 and a protective portion 260. The protective portion 260 has a trapezoidal cross-section, and the main body portion 220 is connected to the protective portion 260. The main body portion 220 is fitted onto the outer peripheral surface of the objective lens structure 100, and the protective portion 260 can cover the lens of the objective lens structure 100. The main body portion 220 is provided with a second mating portion 230. The objective lens structure 100 and the protective cover 200 have a first state and a second state. When the objective lens structure 100 and the protective cover 200 are in the first state (not shown in the figure), the first mating portion 120 is not connected to the second mating portion 230. When the objective lens structure 100 and the protective cover 200 are in the second state, the first mating portion 120 abuts against the second mating portion 230, and the protective portion 260 abuts against the objective lens structure 100. Rotate the protective cover 200 to switch the objective lens structure 100 and the protective cover 200 between a first state and a second state. Specifically, the protective cover 200 can be installed on the objective lens structure 100. After the protective cover 200 is placed on the objective lens structure 100, the first mating part 120 and the second mating part 230 are misaligned. At this time, the first mating part 120 and the second mating part 230 are spaced apart by a distance. Continue to push the protective cover 200 so that the protective cover 200 is completely placed on the objective lens structure 100. At this time, the second annular groove 210 and the flexible member 300 are interference-fitted, and the second mating part 230 is located at one end of the first mating part 120. Then, rotate the protective cover 200 so that the first mating part 120 and the second mating part 230 abut against each other. When the first mating part 120 abuts against the second mating part 230 and the protective part 260 abuts against the objective lens structure 100, the protective part 260 and the second mating part 230 can limit the axial movement of the protective cover 200, allowing the protective cover 200 to be more securely connected to the objective lens structure 100 and effectively preventing any shaking between them. When it is necessary to remove the protective cover 200 from the objective lens structure 100, rotate the protective cover 200 to displace the first mating part 120 and the second mating part 230, and then remove the protective cover 200 from the objective lens structure 100.

[0040] Further, please refer to Figure 4 and Figure 6In some embodiments, the objective lens structure 100 includes a body portion and a first mating portion 120. The first mating portion 120 is connected to the body portion and protrudes relative to the body portion. That is, the shape of the first mating portion 120 can be elongated or cylindrical. The second mating portion 230 is provided with a groove 240, the shape of which can be adapted to the shape of the first mating portion 120. The groove wall of the groove 240 extends along the axial direction of the objective lens structure 100. When the objective lens structure 100 and the protective cover 200 are in the second state, the first mating portion 120 is disposed in the groove 240. Specifically, after rotating the protective cover 200, the first mating part 120 and the second mating part 230 can abut against each other, and the protective part 260 abuts against the lens of the objective lens structure 100, thereby restricting the axial movement of the protective cover 200 relative to the objective lens structure 100. The first mating part 120, after being positioned in the groove 240, can further restrict the axial movement of the protective cover 200 relative to the objective lens structure 100. Furthermore, it should be noted that after the first mating part 120 and the groove 240 are provided, when the protective cover 200 is rotated, there will be a slight jolt when the first mating part 120 and the groove 240 come into contact, which can also remind the operator whether the first mating part 120 is properly installed in the groove 240. To effectively prevent excessive slippage of the protective cover 200 during rotation, limit blocks can be provided at the ends of both the first mating part 120 and the second mating part 230 to prevent excessive rotation of the protective cover 200.

[0041] Further, please refer to Figure 4 and Figure 6 In some embodiments, multiple first matching portions 120 and grooves 240 are provided. Specifically, there may be two, three, or ten first matching portions 120 and grooves 240. Each first matching portion 120 is disposed in one groove 240. Specifically, providing multiple first matching portions 120 and grooves 240 can further improve the effect of restricting the circumferential rotation of the protective cover 200 relative to the objective lens structure 100 after the first matching portions 120 and grooves 240 are engaged, thereby preventing any shaking between the protective cover 200 and the objective lens structure 100 after the protective cover 200 is installed on the objective lens structure 100.

[0042] Furthermore, when the protective cover 200 rotates relative to the objective lens structure 100, a slope 250 can be provided in the second mating part 230, and an arc-shaped surface 130 can be provided in the first mating part 120, thereby making the contact between the first mating part 120 and the second mating part 230 smoother. For details, please refer to... Figure 4 and Figure 6In some embodiments, the second mating portion 230 is provided with a slope 250, and the first mating portion 120 is provided with an arcuate surface 130. Rotating the protective cover 200 causes the slope 250 to abut against the arcuate surface 130, thereby switching the objective lens structure 100 and the protective cover 200 from a first state to a second state. Specifically, after the slope 250 abuts against the arcuate surface 130, the slope 250 allows the protective cover 200 to move axially relative to the objective lens structure 100, thereby causing the first mating portion 120 and the second mating portion 230 to abut. When the objective lens structure 100 and the protective cover 200 are in the second state, the first mating portion 120 abuts against the second mating portion 230, and the protective portion 260 abuts against the objective lens structure 100, which effectively prevents the protective cover 200 from moving axially relative to the objective lens structure 100. Furthermore, the cooperation between the slope 250 and the arcuate surface 130 also serves as a guide, facilitating the rotation of the protective cover 200.

[0043] Further, please refer to Figure 4 and Figure 6 In some embodiments, multiple first mating portions 120 and second mating portions 230 are provided. Specifically, multiple first mating portions 120 and second mating portions 230 can be provided, specifically two, three, or five. When the protective cover 200 and the objective lens structure 100 are in the first state, the multiple first mating portions 120 and second mating portions 230 are staggered to avoid affecting the installation of the protective cover 200 on the objective lens structure 100 after the first mating portions 120 and second mating portions 230 come into contact. Furthermore, the cooperation of multiple first mating portions 120 and second mating portions 230 can improve the stability of the connection between the protective cover 200 and the objective lens structure 100.

[0044] Furthermore, in some embodiments, the main body 220 and the protective part 260 are an integral structure. The main body 220 and the protective part 260 can be manufactured using an integral molding process, resulting in high strength and fast processing efficiency. Additionally, both the protective part 260 and the main body 220 can be made of polymethyl methacrylate (PMMA) or polycarbonate (PC), without specific limitations. The diameter of the protective part 260 can be from 4 mm to 20 mm, and its thickness can be from 0.2 mm to 3 mm.

[0045] Furthermore, in some embodiments, the objective lens structure 100 is provided with a first mating portion 120, and the main body 220 is provided with a second mating portion 230. The objective lens structure 100 and the protective cover 200 have a first state and a second state. When the objective lens structure 100 and the protective cover 200 are in the first state, the first mating portion 120 is not connected to the second mating portion 230. When the objective lens structure 100 and the protective cover 200 are in the second state, the first mating portion 120 abuts against the second mating portion 230, and the protective cover 200 is rotated to switch the objective lens structure 100 and the protective cover 200 between the first state and the second state. Specifically, the protective cover 200 can be mounted on the objective lens structure 100. After the protective cover 200 is fitted onto the objective lens structure 100, the first mating portion 120 and the second mating portion 230 are misaligned. At this time, the first mating portion 120 and the second mating portion 230 are spaced apart by a distance, and the objective lens structure 100 and the protective cover 200 are in the first state. Continue pushing the protective cover 200 until it is completely fitted onto the objective lens structure 100. At this point, the second annular groove 210 and the flexible member 300 are in an interference fit, and the second mating part 230 is located at one end of the first mating part 120. Then, rotate the protective cover 200 to bring the first mating part 120 and the second mating part 230 into contact. Rotating the protective cover 200 ensures the interference fit between the first mating part 120 and the second mating part 230, thus securing them tightly. This secure contact effectively prevents any movement between the protective cover 200 and the objective lens structure 100. When it is necessary to remove the protective cover 200 from the objective lens structure 100, rotate the protective cover 200 to displace the first mating part 120 and the second mating part 230, and then remove the protective cover 200 from the objective lens structure 100.

[0046] Further, the specific structures of the first matching part 120 and the second matching part 230 are described below. In some embodiments, the second matching part 230 includes a first end and a second end, and the height of the second matching part 230 gradually increases from the first end to the second end. Specifically, the shape of the first matching part 120 can be elongated or rectangular. The shape of the second matching part 230 can also be elongated or rectangular. After the height of the second matching part 230 gradually increases, after rotating the protective cover 200, the first matching part 120 and the second matching part 230 abut against each other. Due to the design of the second matching part 230, the first matching part 120 and the second matching part 230 are tightly abutted against each other. When the protective cover 200 can no longer be rotated, the first matching part 120 abuts against the second matching part 230, which can effectively prevent the protective cover 200 from shaking relative to the objective lens structure 100. Alternatively, the first matching part includes a first end and a second end, and the height of the first matching part gradually increases from the first end to the second end. The shape of the first matching part 120 can be elongated or rectangular. The second mating part 230 can also be elongated or rectangular. After the height of the first mating part 120 gradually increases, the first mating part 120 and the second mating part 230 come into contact after the protective cover 200 is rotated. Due to the design of the first mating part 120, the first mating part 120 and the second mating part 230 are tightly pressed together. When the protective cover 200 can no longer be rotated, the first mating part 120 presses against the second mating part 230, which can effectively prevent the protective cover 200 from shaking relative to the objective lens structure 100.

[0047] In addition, in some other embodiments, the first mating part 120 may be provided with an external thread, and the second mating part 230 may be provided with an internal thread. The threaded connection can also effectively prevent the objective lens structure 100 and the protective cover 200 from shaking.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A laser diagnostic corneal contact device, characterized in that, include: The main body includes an objective lens structure, and the outer peripheral surface of the objective lens structure is provided with a first annular groove; A protective cover is fitted onto the outer peripheral surface of the objective lens structure, and the protective cover is provided with a second annular groove. A flexible component is disposed in the first annular groove, and the flexible component is interference-fitted with the groove wall of the second annular groove.

2. The laser diagnostic corneal contact device according to claim 1, characterized in that, The second annular groove includes multiple limiting grooves, which are distributed at intervals along the circumference of the protective cover.

3. The laser diagnostic corneal contact device according to claim 1, characterized in that, The objective lens structure is provided with a first matching part, and the protective cover includes a main body and a protective part. The protective part has a trapezoidal cross-section. The main body is connected to the protective part and is fitted onto the outer peripheral surface of the objective lens structure. The main body is provided with a second matching part. The objective lens structure and the protective cover have a first state and a second state. When the objective lens structure and the protective cover are in the first state, the first matching part is not connected to the second matching part. When the objective lens structure and the protective cover are in the second state, the first matching part abuts against the second matching part, and the protective part abuts against the objective lens structure. The protective cover is rotated to switch the objective lens structure and the protective cover between the first state and the second state.

4. The laser diagnostic corneal contact device according to claim 3, characterized in that, The objective lens structure includes a body portion and a first matching portion. The first matching portion is connected to the body portion and protrudes relative to the body portion. The second matching portion is provided with a groove, the groove wall of which extends along the axial direction of the objective lens structure. When the objective lens structure and the protective cover are in the second state, the first matching portion is disposed in the groove.

5. The laser diagnostic corneal contact device according to claim 4, characterized in that, Both the first matching part and the groove are provided in multiple ways, with each first matching part disposed in one of the grooves.

6. The laser diagnostic corneal contact device according to claim 4, characterized in that, The second matching part is provided with an inclined surface, and the first matching part is provided with an arc-shaped surface. When the protective cover is rotated, the inclined surface abuts against the arc-shaped surface, so that the objective lens structure and the protective cover switch from the first state to the second state.

7. The laser diagnostic corneal contact device according to claim 4, characterized in that, Both the first matching part and the second matching part are provided in multiples.

8. The laser diagnostic corneal contact device according to claim 3, characterized in that, The main body and the protective part are an integral structure.

9. The laser diagnostic corneal contact device according to claim 1, characterized in that, The objective lens structure is provided with a first matching part, and the main body is provided with a second matching part. The objective lens structure and the protective cover have a first state and a second state. When the objective lens structure and the protective cover are in the first state, the first matching part is not connected to the second matching part. When the objective lens structure and the protective cover are in the second state, the first matching part abuts against the second matching part. The protective cover is rotated to switch the objective lens structure and the protective cover between the first state and the second state.

10. The laser diagnostic corneal contact device according to claim 9, characterized in that, The second matching part includes a first end and a second end, and the height of the second matching part gradually increases from the first end to the second end; Alternatively, the first matching portion includes a first end and a second end, and the height of the first matching portion gradually increases from the first end to the second end.

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