Adjustable focus lens device and endoscope

Abstract

The utility model provides a kind of focus-adjustable lens device and endoscope.The focus-adjustable lens device includes cylinder, first lens group, second lens group and focus-adjustable lens group.Cylinder is enclosed to form with accommodating space, and the slot is provided on the cylinder, and the slot is communicated with the outside and the accommodating space.The first lens group is connected to the first end of cylinder, and at least part of the first lens group is located in the accommodating space.The second lens group is connected to the second end of cylinder, and at least part of the second lens group is located in the accommodating space.The focus-adjustable lens group is inserted into the accommodating space through the slot, and is located between the first lens group and the second lens group.In this way, the light hole of adjustable lens group is used, the focus of focus-adjustable lens device can be adjusted, and the adjustable lens group does not need to have larger size, so as to ensure the outer diameter size of focus-adjustable lens device, effectively improve the miniaturization of focus-adjustable lens device, and improve the comfort and experience of patient use.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an adjustable focus lens device and an endoscope. Background Technology

[0002] Endoscopes with focusing capabilities are receiving increasing attention in clinical settings and the market. Adjustable-focus endoscopes can acquire clear images at different distances and angles, helping users to diagnose diseases more accurately and improve the accuracy of pathological analysis results.

[0003] Currently, the lens of an adjustable-focus endoscope consists of an adjustable-focus lens and a conventional lens. The adjustable-focus lens can usually be placed in front of or behind the imaging objective to reduce the manufacturing difficulty of the lens.

[0004] However, during the manufacturing and assembly of the endoscope lens, there may be manufacturing and assembly errors. These errors need to be corrected or eliminated using an adjustable focusing lens to ensure the accuracy of endoscopic imaging. However, because the imaging objective has a large light incidence angle, to ensure that all incident light can be effectively processed by the adjustable focusing lens, the lens needs to be of sufficient size to cover these rays. This is extremely detrimental to the miniaturization of the endoscope lens, thus affecting the patient's comfort and experience. Utility Model Content

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, an adjustable focus lens device is provided.

[0006] The adjustable-focus lens assembly includes a barrel, a first lens group, a second lens group, and an adjustable-focus lens group. The barrel encloses a receiving space, and a slot is provided on the barrel, connecting the external environment to the receiving space. The first lens group is connected to a first end of the barrel, and at least a portion of the first lens group is located within the receiving space. The second lens group is connected to a second end of the barrel, and at least a portion of the second lens group is located within the receiving space. The adjustable-focus lens group is inserted into the receiving space via the slot and is located between the first and second lens groups. The adjustable-focus lens group has a light-transmitting aperture for limiting the aperture of the imaging beam in the central field of view.

[0007] The adjustable focus lens device of this utility model has a slot on the cylindrical body. The adjustable focus lens group can be inserted between the first lens group and the second lens group through the slot. The light entering from the first lens group can be concentrated into the light-transmitting hole of the adjustable lens group, and after adjustment by the adjustable lens group, it can be emitted from the second lens group. In this way, the focus of the adjustable focus lens device can be adjusted by using the light-transmitting hole of the adjustable lens group without the need for the adjustable lens group to have a large size. This ensures the outer diameter of the adjustable focus lens device, effectively improves the miniaturization of the adjustable focus lens device, and enhances the comfort and experience of the patient.

[0008] For example, the adjustable focus lens group includes an adjustable focus lens and an aperture, with a light-transmitting hole disposed on the aperture. The adjustable focus lens has an effective working area, and in the axial direction of the cylinder, the projection of the effective working area toward the aperture covers the light-transmitting hole.

[0009] For example, the adjustable focus lens group includes an adjustable focus lens, and a light-transmitting aperture is disposed on the adjustable focus lens.

[0010] For example, at least two through slots are formed on the cylinder, and adjacent through slots are spaced apart to form an abutment platform in the accommodating space. The abutment platform is disposed opposite to the slot and is used to abut against the side wall surface of the adjustable lens.

[0011] For example, the adjustable focus lens device also includes a drive member electrically connected to the adjustable focus lens, the drive member being used to drive the adjustable focus lens to adjust the position of the focus of the adjustable focus lens.

[0012] For example, the adjustable focus lens device further includes at least one conductive medium, the two ends of which are electrically connected to the drive member and the adjustable focus lens, respectively.

[0013] For example, a groove is formed on the outer wall of the cylinder, and the conductive medium is at least partially located in the groove.

[0014] For example, the cylinder is provided with a clearance groove, which is connected to the slot, and the adjustable lens is electrically connected to the conductive medium through the clearance groove.

[0015] For example, the adjustable focus lens device further includes a first adhesive that fills and seals the clearance groove after the adjustable focus lens is electrically connected to the conductive medium.

[0016] For example, when the adjustable focus lens is located within the accommodating space, the cylindrical body covers the adjustable focus lens to form an encapsulation structure for the adjustable focus lens.

[0017] For example, the adjustable focus lens device further includes a second adhesive body, through which the first lens group and the second lens group are respectively connected to the barrel body.

[0018] According to another aspect of the present invention, an endoscope is also provided, including an insertion part and an adjustable focusing lens device as described above, the adjustable focusing lens device being connected to the insertion part.

[0019] The endoscope of this invention includes the adjustable focusing lens device as described above. Since the adjustable focusing lens device has the beneficial effects described above, the endoscope including the adjustable focusing lens device as described above must also have the beneficial effects described above.

[0020] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0021] The above and other objects, features, and advantages of this utility model will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this utility model and form part of the specification. They are used together with the embodiments of this utility model to explain the utility model and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0022] Figure 1 A cross-sectional view of an adjustable focus lens device according to an exemplary embodiment of the present invention is shown. Figure 1 ;

[0023] Figure 2 A three-dimensional representation of an adjustable focus lens device according to an exemplary embodiment of the present invention is shown. Figure 1 ;

[0024] Figure 3 A stereoscopic view of an adjustable focus lens group according to an exemplary embodiment of the present invention is shown. Figure 1 (Including the aperture plate);

[0025] Figure 4 A stereoscopic view of an adjustable focus lens group according to an exemplary embodiment of the present invention is shown. Figure 2 (Excluding the aperture plate);

[0026] Figure 5 A cross-sectional view of an adjustable focus lens device according to an exemplary embodiment of the present invention is shown. Figure 2 ;

[0027] Figure 6 A three-dimensional representation of an adjustable focus lens device according to an exemplary embodiment of the present invention is shown. Figure 2 .

[0028] The components indicated by the reference numerals in the figures are as follows:

[0029] 1. Cylinder; 11. First end; 12. Second end; 13. Slot; 14. Through slot; 15. Abutment platform; 16. Groove; 17. Clearance slot; 2. First lens group; 3. Second lens group; 4. Adjustable focus lens group; 41. Light passage; 42. Adjustable focus lens; 421. Effective working area; 422. Connection point; 43. Aperture; 5. Driving component; 51. Pin; 6. Conductive medium; 7. Sensor; 8. Metal wire. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model more apparent, exemplary embodiments according to this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, and not all embodiments of this utility model. It should be understood that this utility model is not limited to the exemplary embodiments described herein. Based on the embodiments of this utility model described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this utility model.

[0031] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0032] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0033] One embodiment of this utility model provides an adjustable focusing lens device that can adjust the focus of the adjustable focusing lens while maintaining the outer diameter size of the adjustable focusing lens. The adjustable focusing lens device according to an embodiment of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2As shown, the adjustable focusing lens device includes a barrel 1, a first lens group 2, a second lens group 3, and an adjustable focusing lens group 4. The barrel 1 encloses a receiving space, and a slot 13 is provided on the barrel 1, which connects to the outside and the receiving space. The first lens group 2 is connected to the first end 11 of the barrel 1, and at least a portion of the first lens group 2 is located within the receiving space. The second lens group 3 is connected to the second end 12 of the barrel 1, and at least a portion of the second lens group 3 is located within the receiving space. The adjustable focusing lens group 4 is inserted into the receiving space through the slot 13 and is located between the first lens group 2 and the second lens group 3. The adjustable focusing lens group 4 is provided with a light-transmitting aperture 41 for limiting the aperture of the imaging beam in the central field of view.

[0035] Specifically, different voltages can be applied to the adjustable lens group 4, causing the polymer within the adjustable lens group 4 to deform accordingly, thereby achieving focusing. When light passes through the first lens group 2, it can be focused at the light-transmitting aperture 41 on the adjustable lens group 4. Thus, by applying voltage to the adjustable lens group 4, the focus of the adjustable lens device can be flexibly adjusted.

[0036] Specifically, the cylindrical body 1 can be cylindrical in shape. When the adjustable focus lens device is used in an endoscope, the cylindrical body 1 makes it easier to move through the patient's body. A slot 13 can be provided on the side wall of the cylindrical body 1. The size of the slot 13 can be adapted to the adjustable focus lens group 4 so that the adjustable focus lens group 4 can be inserted and connected to the cylindrical body 1. This not only allows the focus of the adjustable focus lens device to be adjusted using the adjustable focus lens group 4, but also protects the adjustable focus lens group 4 in case of impact or drop of the adjustable focus lens device.

[0037] Furthermore, such as Figure 2 As shown, the focusing lens device may further include a sensor 7 electrically connected to the second lens group 3. The sensor 7 can convert the light signal received by the second lens group 3 into an electrical signal, so that the focusing lens device can record and process the acquired image data. Specifically, the sensor 7 may be a complementary metal-oxide-semiconductor (CMOS) sensor.

[0038] Specifically, light can pass sequentially through the first lens group 2, the adjustable focusing lens group 4, and the second lens group 3, such as... Figure 1 As shown, Figure 1 The direction of the middle arrow can represent the direction of the light. The first lens group 2 can be used to collect the observed optical information and refract light rays that enter from different angles to converge at the light-passing aperture 41 of the adjustable lens group 4. After the light passes through the light-passing aperture 41, it can illuminate the second lens group 3. The second lens group 3 can match the collected optical information with the target surface size of the sensor 7 so that the sensor 7 can convert the light signal into an electrical signal.

[0039] Understandably, the size of the light-passing aperture 41 can affect the amount of light entering the adjustable focusing lens device, thereby affecting the brightness of the image from the adjustable focusing lens device. Specifically, a light-passing aperture 41 with a larger diameter allows more light to pass through, enabling the adjustable focusing lens device to obtain a brighter image even in low-light environments.

[0040] The adjustable focus lens device of this utility model has a slot 13 on the cylindrical body 1. The adjustable focus lens group 4 can be inserted between the first lens group 2 and the second lens group 3 through the slot 13. The light entering from the first lens group 2 can be concentrated on the light-transmitting hole 41 of the adjustable focus lens group 4, and after adjustment by the adjustable focus lens group 4, it can be emitted from the second lens group 3. In this way, the focus of the adjustable focus lens device can be adjusted by using the light-transmitting hole 41 of the adjustable focus lens group 4, without the need for the adjustable focus lens group 4 to have a large size. This ensures the outer diameter of the adjustable focus lens device, effectively improves the miniaturization of the adjustable focus lens device, and enhances the comfort and experience of the patient.

[0041] In some embodiments, such as Figure 3 As shown, the adjustable focus lens group 4 includes an adjustable focus lens 42 and an aperture 43. A light-transmitting hole 41 is disposed on the aperture 43. The adjustable focus lens 42 has an effective working area 421. In the axial direction of the cylinder 1, the projection of the effective working area 421 toward the aperture 43 covers the light-transmitting hole 41.

[0042] The aforementioned effective working area 421 can be located in the central region of the adjustable focus lens 42. Specifically, the effective working area 421 can be understood as the optimal area on the surface of the adjustable focus lens 42 that can participate in light refraction and ensure the imaging quality of the adjustable focus lens 42.

[0043] Specifically, the aperture stop 43 can be positioned between the first lens group 2 and the adjustable focus lens 42, and is in close contact with the adjustable focus lens 42. (See also...) Figure 3 and Figure 4 The size of the effective working area 421 on the adjustable focusing lens 42 can be larger than the size of the light-transmitting hole 41 on the aperture 43. In the axial direction of the cylinder 1, the light passing through the light-transmitting hole 41 can fall into the effective working area 421 of the adjustable focusing lens 42, thereby adjusting the focus of the adjustable focusing lens device using the adjustable focusing lens 42.

[0044] In the above embodiments, the aperture 43 can effectively improve the imaging effect of the adjustable focus lens device, while the adjustable focus lens 42 can adjust the focus of the adjustable focus lens device. Thus, through the combined action of the adjustable focus lens 42 and the aperture 43, the practicality of the adjustable focus lens device can be guaranteed while the imaging effect of the adjustable focus lens device can be effectively improved.

[0045] In some embodiments, such as Figure 4 As shown, the adjustable focus lens group 4 includes an adjustable focus lens 42, and a light-transmitting hole 41 is disposed on the adjustable focus lens 42.

[0046] Specifically, the light-transmitting aperture 41 can be located in the central region of the adjustable focus lens 42, allowing light rays passing through the first lens group 2 to pass through the light-transmitting aperture 41 of the adjustable focus lens 42. Alternatively, the size of the light-transmitting aperture 41 on the adjustable focus lens 42 can be set to the size of an aperture stop, so that the adjustable focus lens 42 can have the same function as an aperture stop 43.

[0047] In the above embodiments, the adjustable focus lens 42 can have the same function as the aperture 43. In this way, the adjustable focus lens 42 can not only adjust the focus of the adjustable focus lens device, but also limit the amount of light entering the adjustable focus lens device, effectively simplifying the connection structure of the adjustable focus lens device and reducing the manufacturing difficulty and cost of the adjustable focus lens device.

[0048] In some embodiments, such as Figure 5 and Figure 6 As shown, at least two through slots 14 are formed on the cylinder 1. Adjacent through slots 14 are spaced apart to form abutment platforms 15 in the accommodating space. The abutment platforms 15 are arranged opposite to the slots 13. The abutment platforms 15 are used to abut against the side wall of the adjustable focus lens 42 to limit the displacement of the adjustable focus lens 42 in the radial direction of the cylinder 1.

[0049] Specifically, the through groove 14 can be formed on the outer wall of the cylinder 1 and communicate with the accommodating space, thereby forming an abutment platform 15 within the accommodating space. When the adjustable focus lens 42 is inserted into the cylinder 1 through the slot 13, the side wall surface of the adjustable focus lens 42 can abut against the abutment platform 15. At this time, the effective working area 421 of the adjustable focus lens 42 and the light-transmitting hole 41 on the aperture 43 can correspond to each other in the axial direction of the cylinder 1. In other words, the center of the effective working area 421 of the adjustable focus lens 42 and the center of the light-transmitting hole 41 on the aperture 43 can be on the same straight line, thereby ensuring the accuracy of the installation position of the adjustable focus lens 42. In addition, when it is necessary to replace or maintain the adjustable focus lens 42, the user can push the adjustable focus lens 42 through the through groove 14 to pull the adjustable focus lens 42 out of the cylinder 1, effectively improving the convenience of disassembling and assembling the adjustable focus lens 42.

[0050] In an embodiment not shown, the through groove 14 may not be connected to the accommodating space, thereby reducing the processing and manufacturing difficulty of the cylinder 1.

[0051] In the above embodiment, when the adjustable focus lens 42 is inserted into the cylinder 1 through the slot 13, the abutment 15 inside the cylinder 1 can limit the displacement of the adjustable focus lens 42 in the radial direction of the cylinder 1. This not only ensures the correct installation position of the adjustable focus lens 42, but also ensures that the effective working area 421 of the adjustable focus lens 42 corresponds to the light-transmitting hole 41 on the aperture 43. This effectively simplifies the installation method of the adjustable focus lens 42, thereby improving the practicality and reliability of the adjustable focus lens device.

[0052] In some embodiments, such as Figure 2 As shown, the adjustable focus lens device also includes a drive unit 5 electrically connected to the adjustable focus lens 42. The drive unit 5 is used to drive the adjustable focus lens 42 to adjust the position of the focal point of the adjustable focus lens 42.

[0053] Specifically, the adjustable focus lens 42 may be provided with a connection point 422 for electrical connection, and the driving component 5 may be provided with a pin 51. The connection point 422 and the pin 51 can be connected by a metal wire 8, thereby realizing the electrical connection between the adjustable focus lens 42 and the driving component 5. The metal wire 8 may be made of a material with good conductivity, such as gold.

[0054] In the above embodiments, the driving component 5 can apply voltage to the adjustable focus lens 42 to adjust the focus of the adjustable focus lens 42, thereby meeting different usage requirements and usage scenarios of the adjustable focus lens device, and further improving the practicality and applicability of the adjustable focus lens device.

[0055] In some embodiments, such as Figure 2 As shown, the adjustable focus lens device also includes at least one conductive medium 6, the two ends of which are electrically connected to the drive member 5 and the adjustable focus lens 42, respectively.

[0056] The aforementioned conductive medium 6 can be made of materials with conductive properties such as copper, or a gold layer can be plated on the material with conductive properties to further improve the conductivity of the conductive medium 6.

[0057] Specifically, the conductive medium 6 can be attached to the outer wall of the cylinder 1. The conductive medium 6 and the cylinder 1 can be connected by a movable connection such as adhesive connection or snap-fit ​​connection. This application does not specify the fixing method of the conductive medium 6.

[0058] Specifically, see Figure 2The conductive medium 6 can be two. The two connection points 422 of the adjustable focus lens 42 can be connected to one end of the two conductive mediums 6 respectively through metal wires 8, and the other end of the two conductive mediums 6 can be connected to the two pins 51 on the driving component 5 respectively, thereby forming an effective electrical circuit between the driving component 5 and the adjustable focus lens 42. It can be understood that the two conductive mediums 6 can be spaced apart on the side wall of the cylinder 1 to ensure that the two conductive mediums 6 can be isolated from each other to avoid short circuits.

[0059] In the above embodiments, since the mechanical strength of the metal wire 8 is limited, the adjustable focus lens 42 and the driving component 5 are electrically connected by the conductive medium 6, which can effectively shorten the length of the metal wire 8, thereby improving the stability of the connection and signal transmission between the adjustable focus lens 42 and the driving component 5, and further improving the reliability of the adjustable focus lens device.

[0060] In some embodiments, such as Figure 2 As shown, a groove 16 is formed on the outer wall of the cylinder 1, and the conductive medium 6 is at least partially located in the groove 16.

[0061] In the above embodiments, at least a portion of the conductive medium 6 can be embedded in the groove 16, thereby minimizing the radial dimension of the adjustable focus lens device. When the adjustable focus lens device is applied to an endoscope, it can ensure the miniaturization of the endoscope lens portion, effectively improving the patient's comfort and experience.

[0062] In some embodiments, such as Figure 2 As shown, a clearance groove 17 is provided on the cylinder 1. The clearance groove 17 is connected to the slot 13. The adjustable focus lens 42 is electrically connected to the conductive medium 6 through the clearance groove 17.

[0063] Specifically, the clearance groove 17 can be provided on the outer wall of the cylinder 1 and communicate with the slot 13 and the accommodating space. The position of the clearance groove 17 can correspond to the position of the connection point 422 of the adjustable focus lens 42. When the metal wire 8 is used to connect to the connection point 422 of the adjustable focus lens 42, the clearance groove 17 can form an operating space to facilitate the connection operation.

[0064] In the above embodiments, by setting the clearance groove 17, the user can have a certain operating space when connecting the adjustable focus lens 42, which effectively improves the accuracy and flexibility in the connection process, as well as the convenience of user use.

[0065] In some embodiments, the adjustable focus lens device further includes a first adhesive (not shown) that fills and seals the clearance groove 17 after the adjustable focus lens 42 is electrically connected to the conductive medium 6.

[0066] The first adhesive mentioned above can be a UV-curable adhesive or an epoxy adhesive, etc., and this application does not make any specific limitation in this regard.

[0067] Specifically, after the adjustable focus lens 42 is electrically connected to the conductive medium 6 using the metal wire 8, in order to ensure the firmness of the connection between the two and to prevent the metal wire 8 from breaking when subjected to external force, a first adhesive can be filled into the relief groove 17. This not only allows the first adhesive to wrap around the metal wire 8, thus protecting the metal wire 8, but also seals the relief groove 17, thereby improving the sealing performance of the adjustable focus lens device.

[0068] In an embodiment not shown, the first adhesive can also be used to fill and seal the slot 13, thereby further improving the sealing of the adjustable focus lens assembly.

[0069] In the above embodiment, the first adhesive can seal the clearance groove 17, which not only improves the connection strength between the adjustable focus lens 42 and the conductive medium 6, but also effectively improves the sealing performance of the adjustable focus lens device, thereby greatly improving the stability of each component in the adjustable focus lens device during use.

[0070] In some embodiments, when the adjustable focus lens 42 is located within the accommodating space, the cylindrical body 1 covers the adjustable focus lens 42 to form an encapsulation structure for the adjustable focus lens 42.

[0071] In the above embodiments, the adjustable focus lens 42 can be inserted into the accommodating space, so that the cylindrical body 1 can be used as the encapsulation structure of the adjustable focus lens 42. In this way, while ensuring the radial dimensions of the adjustable focus lens device, the sealing and reliability of the adjustable focus lens device can also be guaranteed, which greatly improves the reliability and practicality of the adjustable focus lens device.

[0072] Specifically, adjustable focusing lenses typically have an outer encapsulation structure, which effectively protects the adjustable focusing lens 42 from dust, moisture, and other environmental factors. However, adjustable focusing lenses with an outer encapsulation structure have a larger outer diameter. When the adjustable focusing lens device is used in an endoscope, it directly results in a larger radial dimension of the endoscope, greatly affecting patient comfort. This application, however, allows an adjustable focusing lens 42 without an outer encapsulation structure to be inserted into the accommodating space of the cylindrical body 1, and uses a gel to seal the gap between the accommodating space and the external space, thus utilizing the cylindrical body 1 as the encapsulation structure for the adjustable focusing lens 42.

[0073] In some embodiments, the adjustable focus lens device further includes a second adhesive (not shown in the figure), and the first lens group 2 and the second lens group 3 are respectively connected to the cylinder 1 through the second adhesive.

[0074] The second adhesive mentioned above can be a UV-curable adhesive or an epoxy adhesive, etc., and this application does not make any specific limitation in this regard.

[0075] In the above embodiments, the first lens group 2 and the second lens group 3 can be bonded to the cylinder 1 by the second adhesive body, which can improve the sealing of the adjustable focus lens device and prevent displacement between the first lens group 2 and the second lens group 3, effectively ensuring the coaxiality between the first lens group 2 and the second lens group 3, thereby improving the imaging effect of the adjustable focus lens device.

[0076] According to another aspect of the present invention, an endoscope is also provided, including an insertion part and an adjustable focusing lens device as described above, the adjustable focusing lens device being connected to the insertion part.

[0077] Specifically, the insertion part can be rod-shaped, and can be inserted into the body through the patient's natural orifice or open incision, such as through the mouth or esophagus into the stomach, or through the anus into the intestines. Driven by the insertion part, the adjustable-focus lens device can be positioned at the target location within the patient's body to acquire an image of that location, helping users to diagnose diseases more accurately and improve the accuracy of pathological analysis results.

[0078] The endoscope of this invention includes the adjustable focusing lens device as described above. Since the adjustable focusing lens device has the beneficial effects described above, the endoscope including the adjustable focusing lens device as described above must also have the beneficial effects described above.

[0079] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that these exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0080] For ease of description, the term "connection" may be used herein to describe the relationship between one or more elements or features shown in the figure and other elements or features. It should be understood that "connection" may include direct connections or indirect connections via other elements or features, and this document is intended to encompass all such cases.

[0081] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0082] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0083] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A focusing lens device, characterized in that, include: A cylindrical body, the cylindrical body enclosing a receiving space, and a slot provided on the cylindrical body, the slot communicating with the outside and the receiving space; A first lens group is connected to a first end of the cylinder, and at least a portion of the first lens group is located within the accommodating space. The second lens group is connected to the second end of the cylinder, and at least a portion of the second lens group is located within the accommodating space; as well as An adjustable focus lens group is inserted into the accommodating space through the slot and is located between the first lens group and the second lens group; The adjustable focus lens group is provided with a light-passing hole for limiting the aperture of the imaging beam in the central field of view.

2. The adjustable focus lens device according to claim 1, characterized in that, The adjustable focus lens group includes an adjustable focus lens and an aperture. The light-transmitting hole is disposed on the aperture. The adjustable focus lens has an effective working area. In the axial direction of the cylinder, the projection of the effective working area toward the aperture covers the light-transmitting hole.

3. The adjustable focus lens device according to claim 1, characterized in that, The adjustable focus lens group includes an adjustable focus lens, and the light-transmitting aperture is disposed on the adjustable focus lens.

4. The adjustable focus lens device according to claim 2 or 3, characterized in that, At least two through slots are formed on the cylinder body, and adjacent through slots are spaced apart to form abutment platforms in the accommodating space. The abutment platforms are arranged opposite to the slots and are used to abut against the side wall surface of the adjustable lens.

5. The adjustable focus lens device according to claim 2 or 3, characterized in that, The adjustable focus lens device further includes a driving component electrically connected to the adjustable focus lens, the driving component being used to drive the adjustable focus lens to adjust the position of the focal point of the adjustable focus lens.

6. The adjustable focus lens device according to claim 5, characterized in that, The adjustable focus lens device further includes at least one conductive medium, the two ends of which are electrically connected to the driving member and the adjustable focus lens, respectively.

7. The adjustable focus lens device according to claim 6, characterized in that, A groove is formed on the outer wall of the cylinder, and the conductive medium is at least partially located within the groove.

8. The adjustable focus lens device according to claim 6, characterized in that, The cylinder is provided with a clearance groove, which is connected to the slot. The adjustable focus lens is electrically connected to the conductive medium through the clearance groove.

9. The adjustable focus lens device according to claim 8, characterized in that, The adjustable focus lens device further includes a first adhesive, which fills and seals the clearance groove after the adjustable focus lens is electrically connected to the conductive medium.

10. The adjustable focus lens device according to claim 2 or 3, characterized in that, When the adjustable focus lens is located within the accommodating space, the cylindrical body covers the adjustable focus lens to form an encapsulation structure for the adjustable focus lens.

11. The adjustable focus lens device according to claim 1, characterized in that, The adjustable focus lens device further includes a second adhesive body, through which the first lens group and the second lens group are respectively connected to the cylindrical body.

12. An endoscope, characterized in that, It includes an insertion part and an adjustable focus lens device as described in any one of claims 1-11, wherein the adjustable focus lens device is connected to the insertion part.

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