Structure and method for connecting fiberscope to camera, and fiberoptic ductoscopy

Abstract

A structure and method for connecting a fiberscope to a camera, and a fiberoptic ductoscopy. The connection structure comprises a fiberscope part and a camera part. The camera part comprises an outer cylinder, an eyepiece adapter, and a handle housing. The fiberscope comprises an imaging fiber, an imaging fiber holder base, and a connecting member, the connecting member being connected to the rear end of the imaging fiber holder base, the rear end of the imaging fiber passing through a central hole in the connecting member, and the front end extending out through the front end of the imaging fiber holder base. The rear end of the connecting member is fitted with the front end of the outer cylinder by means of a plug-in structure, and the fiberscope part and the camera part are connected and fixed by means of a fixing device, such that when the fiberscope part and the camera part are connected, the rear end of the imaging fiber is close to the eyepiece adapter. The connection structure uses the plug-in structure for connection instead of traditional snap-fit connection, which can significantly reduce the overall size of a connection portion and improve the flexibility and convenience of use, and can also improve the definition and contrast of images and simplify operating steps.

Description

A fiber optic endoscope and camera connection structure, connection method, and ductoscope Technical Field

[0001] This invention belongs to the field of ductoscopy technology, and specifically relates to a connection structure and method for connecting a fiber endoscope and a camera, as well as a ductoscopy instrument. Background Technology

[0002] Fiberoptic ductoscopy is an important tool in the diagnosis and treatment of breast diseases. While conventional fiberoptic ductoscopes can be reused multiple times, this requires strict sterilization procedures. Even slight negligence can lead to cross-infection and serious consequences. Therefore, disposable ductoscopes have emerged on the market.

[0003] In existing disposable ductoscopes, such as the patent with publication number CN219594534U, the light source component and the camera component are connected by setting a light source connector and an image transmission bundle holder, respectively. This multi-point connection method leads to alignment difficulties and long installation time.

[0004] Other existing ductoscopes use a standard snap-fit ​​connection between the eyepiece and the fiber optic cable. This type of ductoscope has a large structure and needs to be fixed to a telescopic rod during use, resulting in a long fiber optic section and significantly affecting image transmission. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a fiber optic lens and camera connection structure, connection method and ductoscope, which solves the problems of large structure size of ductoscope, long fiber optic lens part and poor image transmission effect caused by connecting the eyepiece of fiber optic ductoscope and the image fiber through standard buckle.

[0006] Technical solution: To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this application discloses a fiber optic lens and camera connection structure, comprising:

[0008] The camera unit includes an outer tube, an eyepiece adapter lens, and a handle housing. The rear end of the outer tube is located inside the handle housing, and the front end protrudes from the front end of the handle housing. The eyepiece adapter lens is connected inside the front end of the outer tube.

[0009] The fiber optic end unit includes an image fiber, an image fiber mount base, and a connector. The connector is connected to the rear end of the image fiber mount base. The rear end of the image fiber passes through the central hole of the connector, and the front end protrudes from the front end of the image fiber mount base.

[0010] The rear end of the connector and the front end of the outer cylinder are connected by a plug-in structure, and the fiber lens and camera are connected and fixed by a fixing device. After the fiber lens and camera are connected, the rear end of the image fiber is close to the eyepiece adapter.

[0011] As one embodiment, the plug-in structure includes a plug-in portion and a mating portion;

[0012] The insertion part is located on the rear end face of the fiber optic base fixing cover or the front end face of the outer cylinder; the mating part is located on the front end face of the outer cylinder or the rear end face of the fiber optic base fixing cover.

[0013] After the fiber optic lens section and the camera section are connected, the plug-in section is inserted into the mating section, and the rear end face of the fiber optic mounting cover and the front end face of the outer cylinder are in contact.

[0014] Preferably, the insertion part is any one of a pin, a buckle, a mortise, and a boss, and the mating part is any one of a pin hole, a groove, a tenon, and a bayonet.

[0015] As one embodiment, the fixing device includes a fastening handwheel;

[0016] The fastening handwheel has a hollow structure, with a threaded part at the rear end of its inner ring and an inwardly protruding annular protrusion at the front end. The front end of the outer periphery of the fiber optic base has an annular stepped structure, and the front end of the outer periphery of the outer cylinder has a front thread. The fastening handwheel is fitted onto the fiber optic base, and the inner wall of the front annular protrusion abuts against the annular stepped structure on the fiber optic base. The threaded part at the rear end is connected to the front thread of the outer periphery of the outer cylinder.

[0017] Preferably, the fixing device further includes a locking nut, which is fitted onto and connected to the outer wall of the fiber optic base, with the rear end face of the locking nut abutting against the front end face of the fastening handwheel.

[0018] As one embodiment, the connector includes a fiber optic mount and a fiber optic mount retaining cover;

[0019] The fiber optic mount has a front end and a rear end, the front end of the fiber optic mount is connected to the rear end of the fiber optic mount base, and the rear end protrudes from the fiber optic mount base.

[0020] The fiber optic mounting cover covers the rear end of the fiber optic mount and is connected to the fiber optic mount base.

[0021] As one implementation, the rear end opening of the image fiber base is provided with a recessed annular platform, and the front end of the image fiber base is connected to the annular platform;

[0022] The outer periphery of the rear end of the fiber optic mount is provided with a protruding ridge, and the inner wall of the fiber optic mount fixing cover is provided with a first groove. The rear end of the fiber optic mount is inserted into the inner hole of the fiber optic mount fixing cover, and the protruding ridge is located in the first groove.

[0023] Preferably, the insertion part or mating part is disposed on the rear end face of the fiber optic mounting cover;

[0024] After the fiber optic lens section and the camera section are connected, the rear end face of the fiber optic mounting cover and the front end face of the outer cylinder are attached together.

[0025] As one embodiment, the fiber optic end unit further includes a main lens tube and an illumination fiber optic filament, wherein the main lens tube is connected to the front end inside the image fiber mount base and is partially exposed;

[0026] The rear end of the image fiber is connected inside the image fiber holder and protrudes from the rear end of the image fiber holder; the rear end of the illumination fiber filament is connected inside the image fiber holder fixing cover and is flush with the rear end face of the image fiber holder fixing cover; the front end of both the image fiber and the illumination fiber filament are located at the front end inside the main lens tube.

[0027] Preferably, the front end of the image fiber is provided with a self-focusing imaging objective lens; the outer wall of the main lens tube is also sequentially fitted with an inner tube of the main lens support tube and an outer tube of the main lens support tube, and the front ends of the inner tube and the outer tube of the main lens support tube are flush with the front end of the image fiber base.

[0028] In one embodiment, the outer cylinder includes an outer cylinder body, a connecting part, and an inner cylinder body. The connecting part is connected to the rear end face of the inner cylinder body, and the outer circumferential dimension of the connecting part is larger than the outer circumferential dimension of the inner cylinder body.

[0029] The connecting part is located inside the handle housing and is fixedly connected to the front end of the handle housing; the inner cylinder protrudes from the front end of the handle housing.

[0030] The outer cylinder is fitted around the front end of the inner cylinder, and the inner diameter of the outer cylinder is matched with the outer diameter of the fiber optic mounting cover; the outer walls of the outer cylinder and the inner cylinder are provided with through slots.

[0031] After the fiber lens section and the camera section are connected, the outer ring of the fiber seat fixing cover is connected to the inner ring of the outer cylinder, and the rear end face of the fiber seat fixing cover is attached to the front end face of the inner cylinder.

[0032] Preferably, the inner cylinder is provided with a second through hole, and the outer wall of the connecting part is provided with a second notch, the second notch and the second through hole are connected;

[0033] The second through hole and the illumination fiber filament inside the fiber optic mounting cover are coaxially arranged.

[0034] As one implementation, the fiber optic base is a three-section cylindrical structure, including a front section, a middle section and a rear section with increasing outer diameters. The front section and the middle section are connected by a small hole. The rear section has a recessed annular platform at its end opening. The front end of the fiber optic base is in close contact with the annular platform on the fiber optic base.

[0035] The rear outer wall of the image fiber base is provided with a first notch. One end of the illumination fiber is connected to the image fiber base fixing cover, and the other end passes through the first notch and is connected to the main lens tube on the image fiber base.

[0036] As one implementation, the camera unit further includes a focusing dial, the eyepiece adapter is connected to the inner side of the outer cylinder along the axial direction of the outer cylinder, and the outer cylinder wall is provided with a groove;

[0037] The focusing dial is fitted onto the outer wall of the outer cylinder, and the inner wall of the focusing dial is provided with a second groove. An adjustment rod is connected to the outer wall of the eyepiece adapter. The top of the adjustment rod passes through the slot and is located in the second groove.

[0038] The slot is inclined to the direction of the outer cylinder axis. When the focusing wheel is rotated, the eyepiece adapter can move along the axis of the outer cylinder to get closer to or away from the rear end of the image fiber.

[0039] The camera unit also includes a focus dial fixing cover, which is sleeved on the outer wall of the outer cylinder and fixedly connected thereto. The focus dial is located between the front end of the focus dial fixing cover and the handle housing.

[0040] As one implementation, a camera device is connected to the rear end of the outer cylinder, and the camera device is located inside the handle housing;

[0041] Preferably, the camera device includes a CMOS mounting base, a filter, a lens shading pad, and a CMOS imaging system arranged in sequence. The CMOS imaging system is mounted on the side of the CMOS mounting base, and the filter and the lens shading pad are located in the middle of the two. The front end of the CMOS mounting base is provided with a protruding cylindrical structure. By inserting the cylindrical structure into the rear end of the outer cylinder and then fixing it through a connecting device, the connection between the outer cylinder and the camera device is realized.

[0042] Secondly, this application discloses a method for connecting a fiber optic lens to a camera, including:

[0043] Install a self-focusing imaging objective lens at the front end of the image fiber and connect the illumination fiber filament to the outer periphery of the front end of the image fiber; pass the rear end of the image fiber through the central hole of the image fiber holder and make the rear end of the image fiber protrude 0.05-0.15mm from the central hole of the image fiber holder.

[0044] Pass the autofocusing imaging objective through the fiber mount base and extend it out of the front end of the fiber mount base. Insert the front end of the fiber mount into the rear end of the fiber mount base, leaving the rear end of the fiber mount exposed. Cover the exposed part of the fiber mount with the fiber mount retaining cover and connect it to the fiber mount base.

[0045] Connect the camera device to the rear end of the outer tube, connect the eyepiece adapter to the front end of the outer tube, connect the outer tube and the handle housing, and make the rear end of the outer tube inside the handle housing and the front end of the outer tube protrude from the front end of the handle housing.

[0046] The rear end of the fiber optic mounting cover and the front end of the outer cylinder are connected by a plug-in structure, and the fiber optic lens and camera are connected and fixed by a fixing device; after the fiber optic lens and camera are connected, the rear end of the fiber optic is close to the eyepiece adapter.

[0047] Thirdly, the present invention provides a ductoscope, which includes the fiber optic lens and camera connection structure of any of the above embodiments.

[0048] The "front end" and "rear end" as described in this invention are based on the fiber optic imaging objective lens as the front end and the handle end cap as the rear end. The front end and rear end of other components are also described based on this orientation. Beneficial effects

[0049] 1. In this application, the fiber optic mount fixing cover in the fiber optic lens section and the outer cylinder in the camera section are connected by a plug-in structure, so that there is no connecting structure between the eyepiece adapter and the image fiber in the fiber optic lens section, which replaces the traditional snap-fit ​​connection between the two and can significantly reduce the overall size of the connection part. This type of ductoscope does not need to be fixed to the telescopic rod during use, which greatly shortens the length of the fiber optic lens section, especially the size of the image fiber in the fiber optic lens section. On the one hand, it reduces the risk of damaging the image fiber during operation and reduces the cost of use. On the other hand, the shorter fiber optic lens section ensures better image transmission effect.

[0050] 2. Due to the plug-in structure and fixing device, the snap-fit ​​connection is eliminated, which allows the rear end of the image fiber inside the fiber lens to be closer to the eyepiece adapter, thereby reducing the loss of light signal during transmission and improving the clarity and contrast of the image.

[0051] 3. Traditional ductoscopes connect the fiber scope and eyepiece adapter, then fix the eyepiece to the extension rod of the trolley. The user attaches a length shifter, handle tee, and sheath to the other end of the fiber scope. A certain distance exists between the trolley and the patient, and the image is transmitted via a fragile fiber optic cable, which is easily damaged by inexperienced users. This invention innovatively integrates the camera imaging component into the handle, eliminating the traditional sequential connection of the fiber scope, eyepiece adapter, optical mount, and CMOS camera. The connection between the eyepiece adapter, optical mount, and CMOS camera is simplified and integrated into the handle. During use, a plug-in structure connects the rear end of the fiber optic cable mounting cap to the front end of the outer tube. This quick connection method not only facilitates installation and disassembly but also ensures good alignment accuracy, allowing users to quickly change between different fiber scopes as needed. Attached Figure Description

[0052] Figure 1 is an internal structural diagram of the fiber mirror and camera connection structure of the present invention.

[0053] Figure 2 is an exploded view of the connection structure between the fiber mirror and the camera of the present invention.

[0054] Figure 3 is a diagram of the internal structure of the fiber optic base in the fiber optic lens and camera connection structure of the present invention.

[0055] Figure 4 is a three-dimensional structural diagram of the fiber optic base in the fiber optic lens and camera connection structure of the present invention.

[0056] Figure 5 is a schematic diagram of the fiber mount in the fiber mirror and camera connection structure of the present invention.

[0057] Figure 6 is a schematic diagram of the fiber optic mounting cover in the fiber optic lens and camera connection structure of the present invention.

[0058] Figure 7 is a diagram showing the connection status of the fiber optic base and the fiber optic fixing cover in the fiber optic lens and camera connection structure of the present invention.

[0059] Figure 8 is a schematic diagram of the outer cylinder in the fiber mirror and camera connection structure of the present invention (view 1).

[0060] Figure 9 is a schematic diagram of the outer cylinder in the fiber mirror and camera connection structure of the present invention (view 2).

[0061] Figure 10 is a schematic diagram of the outer cylinder in the fiber mirror and camera connection structure of the present invention (view 3).

[0062] Figure 11 is a schematic diagram of the focusing dial in the fiber mirror and camera connection structure of the present invention;

[0063] Among them, 1. Image fiber; 101. Self-focusing imaging objective lens; 2. Main lens tube; 201. Inner tube of support tube; 202. Outer tube of support tube; 3. Image fiber mount base; 301. Front section; 302. Middle section; 303. Rear section; 3031. First notch; 304. Small hole; 305. Annular platform; 4. Illumination fiber filament; 5. Image fiber mount; 501. Protrusion; 6. Image fiber mount fixing cover; 601. Boss; 602. First through hole; 603. First groove; 7. Fastening handwheel; 701. Annular protrusion; 8. Locking nut; 9. Focusing dial; 901. Second groove 10. Outer cylinder; 1001. Outer cylinder body; 1002. Connecting part; 1003. Inner cylinder body; 1004. Slot; 1005. Center hole; 1006. Bayonet; 1007. Second through hole; 1008. Second notch; 11. Eyepiece adapter lens; 12. Camera device; 1201. CMOS mounting base; 12011. Cylindrical structure; 12012. Third notch; 1202. Filter; 1203. Lens hood; 1204. CMOS imaging system; 13. Handle housing; 14. Focusing dial fixing cover; 15. Handle tail cover. Detailed Implementation

[0064] The invention will now be further described with reference to the accompanying drawings.

[0065] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0066] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0067] A fiber optic lens and camera connection structure includes a camera unit and a fiber optic lens unit. The camera unit includes an outer cylinder 10, an eyepiece adapter 11, and a handle housing 13. The rear end of the outer cylinder 10 is located inside the handle housing 13, and the front end protrudes from the front end of the handle housing 13. The eyepiece adapter 11 is connected to the front end of the outer cylinder 10. The fiber optic lens unit includes an image fiber 1, an image fiber base 3, and a connector. The connector is connected to the rear end of the image fiber base 3. The rear end of the image fiber 1 passes through the central hole of the connector, and the front end protrudes from the front end of the image fiber base 3. The rear end of the connector and the front end of the outer cylinder 10 are engaged by a plug-in structure, and the fiber optic lens unit and the camera unit are connected and fixed by a fixing device. When the fiber optic lens unit and the camera unit are connected, the rear end of the image fiber 1 is close to the eyepiece adapter 11.

[0068] The fiber optic mount cover in this application and the outer cylinder in the camera section are connected by a plug-in structure, eliminating the need for a connecting structure between the eyepiece adapter and the image fiber in the fiber optic lens. This replaces the traditional snap-fit ​​connection, significantly reducing the overall size of the connecting parts. Combined with the camera device integrated into the handle housing, the entire fiber optic mammoscope is more compact, making it more suitable for operation in confined spaces and improving flexibility and convenience. This type of mammoscope does not require fixing to the telescopic rod during use, greatly shortening the length of the fiber optic lens, especially the image fiber. This reduces the risk of damaging the image fiber during operation and lowers operating costs. Furthermore, the shorter fiber optic lens ensures better image transmission.

[0069] The insertion structure includes an insertion part and a mating part. The insertion part can be located on the rear end face of the fiber optic mounting cover 6 or the front end face of the outer cylinder 10. When the insertion part is located on the rear end face of the fiber optic mounting cover 6, the mating part is located on the front end face of the outer cylinder 10. When the insertion part is located on the front end face of the outer cylinder 10, the mating part is located on the rear end face of the fiber optic mounting cover 6.

[0070] After the fiber optic lens and camera unit are connected, the connector is inserted into the mating part, and the rear end face of the fiber optic mount fixing cover 6 and the front end face of the outer cylinder 10 are in contact. The mating design of the connector and mating part ensures that the rear end face of the fiber optic mount fixing cover 6 and the front end face of the outer cylinder 10 are completely in contact, thereby achieving high-precision alignment between the rear end of the fiber optic 1 and the eyepiece adapter lens 11. This helps reduce losses during optical signal transmission and improves image clarity and resolution.

[0071] It is worth noting that the rear end of the image fiber 1 is aligned with the central axis of the eyepiece adapter 11. To achieve this, the central hole axis of the image fiber mount 5 needs to be aligned with the central axis of the eyepiece adapter 11.

[0072] In this application, the insertion part can be one of various insertion forms, such as a pin, a snap fastener, a mortise, or a boss. Correspondingly, the mating part can be a pin hole, a slot, a tenon, or a bayonet. By inserting the pin into the pin hole, the snap fastener into the slot, the mortise into the tenon, or the boss into the bayonet, the connection between the fiber seat fixing cover 6 and the outer cylinder 10 can be achieved.

[0073] It is worth noting that only one insertion part and one mating part are provided, which facilitates the positioning of the fiber optic lens part and the camera part through a single positioning method.

[0074] In this application, the fixing device includes a fastening handwheel 7; the fastening handwheel 7 has a hollow structure, with a threaded portion at the rear end of its inner ring and an inwardly protruding annular protrusion 701 at the front end. The front end of the outer periphery of the fiber optic base 3 has an annular stepped structure, and the front end of the outer periphery of the outer cylinder 10 has a front thread. The fastening handwheel 7 is fitted onto the fiber optic base 3, and the inner wall of the front annular protrusion 701 abuts against the annular stepped structure on the fiber optic base 3. The threaded portion at the rear end is threadedly connected to the front end of the outer periphery of the outer cylinder 10.

[0075] The hollow interior of the fastening handwheel 7, the threaded portion of the rear inner ring, and the annular protrusion of the front inner ring not only facilitate manual tightening or loosening by the operator but also effectively prevent loosening due to prolonged use. Furthermore, it tightly secures the fiber optic base 3 to the outer cylinder 10, further enhancing the stability of the entire system.

[0076] Furthermore, the fixing device also includes a locking nut 8, which is fitted onto and connected to the outer wall of the fiber optic base 3, with the rear end face of the locking nut 8 abutting against the front end face of the fastening handwheel 7.

[0077] The locking nut 8 forms a double locking mechanism by abutting against the front end face of the fastening handwheel 7. This design not only strengthens the fixing effect of the fastening handwheel 7, but also effectively prevents the fastening handwheel 7 from loosening due to vibration or impact, thereby improving the stability of the overall structure.

[0078] It should be noted that this application ensures a quick and secure connection by first positioning internally and then locking externally. Specifically, this application uses a plug-in structure to allow for quick alignment of the camera unit and the fiber optic lens unit. After alignment, the camera unit and the fiber optic lens unit are connected and fixed using a fixing device. The plug-in structure reduces the difficulty of alignment. The single fixing device allows for quick installation and disassembly each time it is used, and the external thread of the fixing device ensures structural stability after the connection is fixed.

[0079] In one embodiment, the connector is a split structure, comprising a fiber optic mount 5 and a fiber optic mount fixing cover 6. The fiber optic mount 5 has a front end and a rear end, with the front end of the fiber optic mount 5 connected to the rear end of the fiber optic mount base 3, and the rear end protruding from the fiber optic mount base 3. This design, where the front end of the fiber optic mount 5 is connected to the rear end of the fiber optic mount base 3, ensures a tight and reliable connection, preventing loosening or detachment during use.

[0080] The fiber optic mount fixing cover 6 covers the rear end of the fiber optic mount 5 and is connected to the fiber optic mount base 3. The fiber optic mount fixing cover 6 not only fixes the fiber optic mount 5, but also protects the rear end of the fiber optic mount 5, prevents external contaminants from entering, keeps the internal components clean and dry, and extends the service life of the equipment.

[0081] The fiber optic connector 5 and the fiber optic connector mounting cover 6 adopt a modular design, allowing them to be disassembled and replaced independently. If a part malfunctions, it can be replaced individually without replacing the entire connector, thus reducing maintenance costs.

[0082] Furthermore, the rear end opening of the image fiber base 3 is provided with a recessed annular platform 305, and the front end of the image fiber base 5 is connected to the annular platform 305; the outer periphery of the rear end of the image fiber base 5 is provided with a protruding ridge 501, and the inner wall of the image fiber base fixing cover 6 is provided with a first groove 603. The rear end of the image fiber base 5 is inserted into the inner hole of the image fiber base fixing cover 6, and the protruding ridge 501 is located in the first groove 603.

[0083] The annular platform 305 provides stable support, ensuring that the front end of the fiber optic mount 5 is firmly positioned in the fiber optic mount base 3, preventing displacement or loosening during use.

[0084] The engagement of the protruding rib 501 with the first groove 603 serves as a guide, enabling the rapid connection between the fiber optic mount 5 and the fiber optic mount fixing cover 6. This ensures the precise alignment of the fiber optic mount 5 within the fiber optic mount base 3 and the fiber optic mount fixing cover 6, reducing installation errors and improving the accuracy of the equipment. On the other hand, it ensures the fixation of the rear end of the fiber optic mount 5 within the fiber optic mount fixing cover 6, further enhancing the stability of the structure.

[0085] The insertion or mating part is located on the rear end face of the fiber optic mount fixing cover 6; when the fiber optic lens part and the camera part are connected, the rear end face of the fiber optic mount fixing cover 6 and the front end face of the outer cylinder 10 are in contact. Furthermore, the insertion part is a boss, and the mating part is a bayonet.

[0086] In another embodiment, the connector is an integral structure, meaning it is an external structure with a fiber optic mount 5 and a fiber optic mount fixing cover 6, for mates with other assembly structures. This design facilitates the connection between the connector and the fiber optic mount base 3.

[0087] In this application, the fiber optic section also includes a main lens tube 2 and an illumination fiber optic filament 4. The main lens tube 2 is connected to the front end inside the image fiber base 3 and is partially exposed. The axis of the main lens tube 2 located inside the image fiber base 3 coincides with the axis of the central hole of the image fiber base 5. The front end of the image fiber 1 is connected inside the main lens tube 2 and is equipped with a self-focusing imaging objective lens 101. The front end of the illumination fiber filament 4 is located inside the main lens tube 2 and is wrapped around the outer periphery of the image fiber 1.

[0088] This design ensures that the axis of the main lens tube 2 located inside the fiber mount base 3, the axis of the central hole of the fiber mount 5, and the central axis of the eyepiece adapter 11 are all on the same straight line, guaranteeing the image transmission effect of the fiber. The front end of the illumination fiber 4 is located inside the main lens tube 2 and wrapped around the outer periphery of the fiber 1, ensuring that the illumination light can be uniformly irradiated onto the target area, thus improving image quality. The self-focusing imaging objective lens 101 is prior art and will not be described in detail in this application; it enables parallel light rays entering the objective lens to be naturally guided to the focal point.

[0089] In summary, the fiber optic lens section of this application includes a fastening handwheel 7, a locking nut 8, an illumination fiber 4 for illumination, an image fiber 1 for image acquisition, an image fiber base 3, and a main lens tube 2, an image fiber base 5, and an image fiber base fixing cover 6 mounted on the image fiber base 3. This part is detachable and replaceable.

[0090] Furthermore, the outer wall of the rear end of the fiber optic base 3 is provided with a notch, and the fiber optic base fixing cover 6 and the outer cylinder 10 are both provided with through holes. The rear end of the illumination fiber optic cable 4 passes through the main lens tube 2 and exits from the notch on the outer wall of the rear end of the fiber optic base 3, and then passes into the through hole on the fiber optic base fixing cover 6. The through hole in the outer cylinder 10 is set along its length direction for installing the illumination source. When the fiber optic lens part and the camera part are connected, the axis of the first through hole 602 and the axis of the second through hole 1007 coincide.

[0091] The rear end of the illumination fiber optic cable 4 passes through the main lens tube 2 and enters the through hole of the image fiber holder fixing cover 6 through a notch on the outer wall of the rear end of the image fiber holder base 3. This path design ensures smooth transmission of the illumination fiber optic cable 4 and reduces light source loss. When the fiber optic lens section and the camera section are connected, the axes of the through holes inside the image fiber holder fixing cover 6 and the outer cylinder 10 coincide, ensuring that the optical path of the illumination source can be smoothly transmitted to the front-end illumination fiber optic cable 4. This design not only improves the transmission efficiency of the optical path but also simplifies the connection process.

[0092] It is worth noting that the through holes inside the fiber optic mounting cover 6 and the outer cylinder 10 are both located on the plug-in structure. By placing the two through holes on the plug-in structure, it can be ensured that the axes of the two through holes are perfectly aligned when connected, ensuring that the light emitted by the illumination source can be smoothly transmitted to the imaging area at the front end through the illumination fiber 4, thereby improving the transmission efficiency and imaging quality of the optical path.

[0093] In this application, the camera unit also includes a focusing dial 9, an eyepiece adapter 11 connected inside the outer cylinder 10 along the axial direction of the outer cylinder 10, and the eyepiece adapter 11 can move along the axial direction of the outer cylinder 10. The outer cylinder 10 has a groove in its wall. The focusing dial 9 is sleeved on the outer wall of the outer cylinder 10, and the inner wall of the focusing dial 9 has a second groove 901. An adjustment rod is connected to the outer wall of the eyepiece adapter 11. The top of the adjustment rod passes through the groove of the outer cylinder 10 and is located in the second groove 901. The direction of the groove 1004 is inclined to the axial direction of the outer cylinder 10. When the focusing dial 9 rotates, the eyepiece adapter 11 can move along the axial direction of the outer cylinder 10 to approach or move away from the rear end of the image fiber 1.

[0094] In use, the user manually rotates the focusing dial 9 to achieve the focusing function. The inner wall of the focusing dial 9 has a second groove 901, which contacts the top of the adjusting rod. When the focusing dial 9 rotates, the adjusting rod will rotate along with the focusing dial 9 due to the presence of the second groove 901. Because the slot 1004 is inclined to the axis of the outer cylinder 10, when the focusing dial 9 rotates, the adjusting rod will not only rotate with the focusing dial 9 but also move along the direction of the slot 1004. The bottom end of the adjusting rod is connected to the eyepiece adapter 11. As the adjusting rod moves in the slot 1004, the eyepiece adapter 11 will move along the axis of the outer cylinder 10, that is, closer to or further away from the rear end of the image fiber 1, thereby changing the focal point position and achieving the focusing purpose.

[0095] This application utilizes the cooperation between the focusing dial 9, the adjusting rod, and the slotted wall of the outer cylinder 10 to make the design of the entire focusing mechanism more compact, save space, and facilitate the development of miniaturized products.

[0096] In some further embodiments, the adjusting rod is a screw. The axial angle of the slot and the outer cylinder is 45°. By designing the slot to be 45° inclined, the adjusting rod can move a greater distance along the axial direction of the outer cylinder 10 at the same rotation angle. This allows the product to achieve a larger focusing range with a smaller rotation angle change. The 45° angle design helps optimize force transmission efficiency. When the user rotates the focusing dial 9, the force can be more effectively converted into axial movement of the adjusting rod, reducing force loss and making the focusing process smoother. The 45° inclined slot design can enhance the stability of the structure. During focusing, the adjusting rod is subjected not only to forces perpendicular to the axial direction but also to forces along the slot direction. The combination of these forces can better maintain the stability of the adjusting rod and the eyepiece adapter 11, reducing wobbling and offset.

[0097] Furthermore, the camera unit also includes a focus dial fixing cover 14, which is fitted onto the outer wall of the outer cylinder 10 and fixedly connected thereto. The focus dial 9 is located between the front end of the focus dial fixing cover 14 and the handle housing 13.

[0098] Example 2

[0099] This embodiment provides a fiber optic lens and camera connection structure, which explains and expands upon embodiment 1. As shown in Figures 1 and 2, it includes a fiber optic lens section and a camera section. The fiber optic lens section includes an image fiber 1, a main lens tube 2, an image fiber mount base 3, an illumination fiber optic cable 4, an image fiber mount 5, an image fiber mount fixing cover 6, a fastening handwheel 7, and a locking nut 8; the front end of the image fiber 1 is provided with a self-focusing imaging objective lens 101.

[0100] The camera unit includes a focus dial 9, an outer tube 10, an eyepiece adapter 11, a camera device 12, a handle housing 13, a focus dial fixing cover 14, and a handle tail cover 15. The camera device 12 is located inside the handle housing 13 and connected to the rear end of the outer tube 10. The camera device 12 includes a CMOS mounting base 1201, a filter 1202, a lens hood 1203, and a CMOS imaging system 1204 arranged sequentially.

[0101] As a specific design solution:

[0102] As shown in Figures 3 and 4, the fiber optic base 3 is a three-section cylindrical structure, including a front section 301, a middle section 302, and a rear section 303 with increasing outer diameters. The front section 301 and the middle section 302 are connected by a small hole 304. The rear section 303 has a recessed annular platform 305 at its end opening. The front end of the fiber optic base 5 is in close contact with the annular platform 305 on the fiber optic base 3, and the rear end is exposed. The fiber optic base fixing cover 6 covers the exposed part of the fiber optic base 5, and the front end face of the fiber optic base fixing cover 6 contacts the end face of the rear section 303 of the fiber optic base 3 and is connected by screws (as shown in Figure 7).

[0103] The rear end of the main mirror tube 2 is horizontally inserted into the small hole 304 in the fiber optic mount 3. A first notch 3031 is provided on the outer wall of the rear section 303 of the fiber optic mount 3, and a first through hole 602 is provided on the cover of the fiber optic mount fixing cover 6 (as shown in Figure 6). The front end of the illumination fiber optic cable 4 passes through the first through hole 602 on the fiber optic mount fixing cover 6, then passes through the first notch 3031 into the main mirror tube 2, and surrounds the outer periphery of the fiber optic cable 1. The front end of the fiber optic cable 1 is connected to the self-focusing imaging objective lens 101. The outer wall of the main mirror tube 2 is also sequentially fitted with an inner tube 201 and an outer tube 202 of the main mirror support tube (as shown in Figure 2), and the front ends of both are flush with the front end of the fiber optic mount 3. The flush alignment of the front ends of the inner tube 201 and the outer tube 202 with the front end of the fiber optic mount 3 ensures the alignment and coordination between the various components. The multi-layer tube support structure can effectively disperse the stress on the main endoscope tube during use, reduce excessive local stress, and extend the service life of the main endoscope tube and its related components.

[0104] As shown in Figure 5, the outer wall of the fiber optic mount 5 is provided with a protruding ridge 501, and the inner wall of the fiber optic mount fixing cover 6 is provided with a first groove 603 (as shown in Figure 6). The protruding ridge 501 and the first groove 603 correspond in shape. The fiber optic mount fixing cover 6 covers the exposed part of the fiber optic mount 5. By placing the protruding ridge 501 in the first groove 603, the position of the fiber optic mount 5 is fixed.

[0105] As shown in Figures 8, 9, and 10, the outer cylinder 10 includes an outer cylinder body 1001, a connecting part 1002, and an inner cylinder body 1003. The connecting part 1002 is connected to the rear end face of the inner cylinder body 1003. The inner cylinder body 1003 is located inside the outer cylinder body 1001, and the outer cylinder body 1001 is fitted around the front end of the outer circumference of the inner cylinder body 1003. The outer walls of both the outer cylinder body 1001 and the inner cylinder body 1003 have through slots 1004. The inner cylinder body 1003 has a central hole 1005. The front end of the eyepiece adapter lens 11 is horizontally inserted into the outer cylinder body 1001 from one end of the connecting part 1002 of the outer cylinder 10, and its front end passes through the central hole 1005. The wall can be connected to the adjusting rod through the slot 1004; the inner wall of the focusing wheel 9 is provided with a second groove 901 (as shown in Figure 11). The focusing wheel 9 is sleeved on the outer wall of the outer cylinder 1001 of the outer cylinder 10, and the adjusting rod connected to the outer wall of the eyepiece adapter 11 is located in the second groove 901. When the focusing wheel 9 rotates, it can drive the adjusting rod to move in the second groove 901, so that the eyepiece adapter 11 can move back and forth to adjust the focal length.

[0106] The rear end of the outer cylinder 10 is connected to the camera device 12 through the connecting part 1002, the front end is inserted through the rear end of the handle housing 13, and the outer cylinder 1001 protrudes from the front end of the handle housing 13. The outer cylinder 10 is fixedly connected to the front end of the handle housing 13 through the connecting part 1002.

[0107] The inner cylinder 1003 of the outer cylinder 10 has a second horizontal through hole 1007 inside, and the outer wall of the connecting part 1002 has a second notch 1008. The lighting source extends into the second through hole 1007 through the second notch 1008 and reaches the front end of the second through hole 1007. Furthermore, the lighting source can be an LED light.

[0108] As shown in Figures 1 and 2, the focusing wheel fixing cover 14 is fitted onto and fixedly connected to the outer wall of the outer cylinder 10. The focusing wheel 9 is located between the front end of the focusing wheel fixing cover 14 and the handle housing 13, and the position of the focusing wheel 9 is fixed by the focusing wheel fixing cover 14. The handle tail cover 15 is open at one end and closed at the other end, with the open end connected to the rear end of the handle housing 13; preferably, the open end is connected to the rear end of the handle housing 13 by threads.

[0109] As shown in Figures 1 and 2, the camera device 12 includes a CMOS mounting base 1201, a filter 1202, a lens hood 1203, and a CMOS imaging system 1204 arranged sequentially. The CMOS imaging system 1204 is mounted on the side of the CMOS mounting base 1201, with the filter 1202 and the lens hood 1203 located between them. The front end of the CMOS mounting base 1201 has a protruding cylindrical structure 12011. By inserting the cylindrical structure 12011 into the connecting part 1002 of the outer cylinder 10, and then fixing it through a connecting device, the outer cylinder 10 and the camera device 12 are connected. Preferably, the connecting device is a screw. The outer wall of the CMOS mounting base 1201 has a third notch 12012 for a wire to pass through. The front end of the wire is connected to a lighting source for supplying power to the lighting source.

[0110] The rear end of the fiber optic mounting cover 6 is provided with a boss 601 (as shown in Figure 6), and the inner cylinder 1003 of the outer cylinder 10 is provided with a bayonet 1006 corresponding to the shape of the boss 601 (as shown in Figure 8). The fiber optic lens and the camera lens are positioned and connected by inserting the boss 601 into the bayonet 1006, and are fixed by the fastening handwheel 7 and the locking nut 8. The specific structure is as described in Embodiment 1.

[0111] It is worth noting that the outer circumference of the connecting part 1002 is larger than that of the outer circumference of the outer cylinder 1001. The outer cylinder 1001 is fitted onto the front end of the outer circumference of the inner cylinder 1003. The connecting part 1002 is located inside the handle housing 13 and is connected to the front end of the handle housing 13 by screws. The inner cylinder 1003 protrudes from the front end of the handle housing 13. The inner diameter of the outer cylinder 1001 is adapted to the outer diameter of the fiber optic mount fixing cover 6. When the fiber lens part and the camera part are connected, the outer ring of the fiber optic mount fixing cover 6 is connected to the inner ring of the outer cylinder 1001, and the rear end face of the fiber optic mount fixing cover 6 is in contact with the front end face of the inner cylinder 1003.

[0112] The larger outer perimeter of the connecting part 1002 provides stronger mechanical support and enhances the strength of the connection point. This design effectively prevents loosening or detachment caused by external forces during use. The connecting part 1002 is fixed to the front end of the handle housing 13 with screws. This connection method is not only firm and reliable, but also ensures stability after long-term use and reduces the risk of loosening due to vibration or impact.

[0113] The inner cylinder 1003 protrudes from the front end of the handle housing 13, allowing for easy docking with other components (such as the fiber seat fixing cover 6), thus improving the convenience of assembly and disassembly.

[0114] The rear end face of the fiber seat fixing cover 6 is fitted with the front end face of the inner cylinder 1003: This fitting design not only ensures close contact between the two components, but also reduces the gap in the middle, improving the stability and sealing of the optical system.

[0115] The inner diameter of the outer cylinder 1001 is matched with the outer diameter of the fiber optic mounting cover 6. This size matching design ensures that the fiber optic mounting cover 6 can be accurately inserted into the outer cylinder 1001, avoiding misalignment problems caused by size mismatch and improving the assembly accuracy.

[0116] Furthermore, the inner diameter of the outer cylinder 1001 is adapted to the outer diameter of the fiber optic mount fixing cover 6, which can be 0.1mm-0.5mm larger than the outer diameter of the fiber optic mount fixing cover 6. During use, simply align the fiber optic lens part and the camera handle part with the bayonet and connect them, then assemble the handle tee and sheath connector, and adjust the focus dial on the camera handle until the image is clear.

[0117] Example 3

[0118] Based on the fiber optic lens and camera connection structure provided in Embodiments 1 and 2, this embodiment provides a fiber optic lens and camera connection method, including fiber optic lens assembly, camera assembly, and combination of fiber optic lens and camera.

[0119] Fiberoptic endoscope assembly process:

[0120] Install a self-focusing imaging objective lens 101 at the front end of the image fiber 1, and connect the illumination fiber 4 to the outer periphery of the front end of the image fiber 1; pass the rear end of the image fiber 1 through the central hole of the image fiber holder 5, and make the rear end of the image fiber 1 protrude 0.05-0.15mm from the central hole of the image fiber holder 5.

[0121] The autofocusing imaging objective lens 101 is passed through the fiber optic mount 3 and extends out of the front end of the fiber optic mount 3. The front end of the fiber optic mount 5 is inserted into the rear end of the fiber optic mount 3, with the rear end of the fiber optic mount 5 exposed. The fiber optic mount fixing cover 6 covers the exposed part of the fiber optic mount 5 and is connected to the fiber optic mount 3.

[0122] Camera assembly process:

[0123] Connect the camera device 12 to the rear end of the outer cylinder 10, connect the eyepiece adapter 11 to the front end of the outer cylinder 10, connect the outer cylinder 10 and the handle housing 13, and make the rear end of the outer cylinder 10 located inside the handle housing 13 and the front end of the outer cylinder 10 exposed at the front end of the handle housing 13.

[0124] The fiber optic lens and camera components are combined.

[0125] The rear end of the fiber optic mounting cover 6 and the front end of the outer cylinder 10 are connected by a plug-in structure, and the fiber optic lens and the camera are connected and fixed by a fixing device; after the fiber optic lens and the camera are connected, the rear end of the fiber optic 1 is close to the eyepiece adapter lens 11.

[0126] The assembly of the fiber optic lens section and the camera section further includes the following process:

[0127] Insert the protrusion 601 on the rear end face of the fiber seat fixing cover 6 into the bayonet 1006 on the front end face of the outer cylinder 10.

[0128] The hollow-structured fastening handwheel 7 is fitted onto the fiber optic base 3. The inner wall of the annular protrusion 701 at the front end of the fastening handwheel 7 abuts against the annular stepped structure on the fiber optic base 3. The threaded part at the rear end of the fastening handwheel 7 is threadedly connected to the front end of the outer circumference of the outer cylinder 10. Specifically, the assembly process and principle of the fiber optic lens and camera connection structure are as follows:

[0129] I. Fiberoptic endoscope manufacturing process:

[0130] 1. After cutting the image fiber 1, polish both ends. Install the self-focusing imaging objective 101 on the end face of the image fiber 1 and cure it. Cut, polish and clean the main mirror tube and count out multiple illumination fiber filaments. Prepare the glue and then perform the tube insertion process of the objective assembly (the illumination fiber filaments are inserted into the main mirror tube 2 and closely attached to the inner wall of the main mirror tube 2. The self-focusing imaging objective 101 with the image fiber 1 is inserted into the main mirror tube 2 and wrapped by the illumination fiber filaments). After the glue cures, polish the objective lens. After polishing, check the image.

[0131] 2. Clean the fiber optic mount 5. Apply glue to the other end of the fiber optic 1 and insert it into the center hole of the fiber optic mount 5. Make the end face of the fiber optic 1 protrude 0.1mm above the center hole plane of the fiber optic mount. Then install the fiber optic protective sheet and apply glue (the outer periphery of the fiber optic protective sheet is glued to the connection hole at the rear end of the fiber optic mount 5. The fiber optic protective sheet is used to protect the fiber optic 1 that protrudes from the fiber optic mount).

[0132] 3. Insert the front end of the assembled component (on the side of the self-focusing imaging objective lens 101) into the small hole 304 (the small hole 304 is a round hole) from the rear end of the fiber optic mount 3. Then, place the front end of the fiber optic mount 5 on the annular platform 305 of the fiber optic mount 3 (the diameter of the annular platform is about 0.1 mm larger than the outer diameter of the boss at the front end of the fiber optic mount 5). Then, clean the first through hole 602 (the first through hole 602 is a round hole) on the fiber optic mount fixing cover 6. Insert the illumination fiber optic cable into the first through hole 602. Finally, align the first groove 603 on the fiber optic mount fixing cover 6 with the protrusion 501 on the fiber optic mount. Tighten the two fastening screws on the left and right to fix the fiber optic mount fixing cover 6 to the fiber optic mount 3 (the fiber optic mount fixing cover 6 has symmetrical through holes on the left and right, and the fiber optic mount 3 has symmetrical screw holes on the left and right. The fastening screws pass through the through holes of the fiber optic mount fixing cover 6 and are inserted into the screw holes of the fiber optic mount 3).

[0133] 4. Prepare the glue, and put the outer tube 202 and the inner tube 201 of the primary lens support tube onto the primary lens tube 2 in sequence and glue them together to cure, so that the front end face of the outer tube 202 and the inner tube 201 of the primary lens support tube are on the same plane as the front end face of the fiber mount base 3.

[0134] 5. Insert the fastening handwheel 7 onto the front end of the fiber optic base 3, and then screw the front locking nut 8 into the thread at the front end of the fiber optic base 3, so that the fastening handwheel 7 can be freely turned on the fiber optic base.

[0135] II. Manufacturing process of the camera handle:

[0136] 1. Install the CMOS imaging system 1204 on the CMOS mount 1201, adjust the focal plane and viewing axis angles, and then fix it.

[0137] 2. Insert the eyepiece adapter 11 into the outer cylinder 10, align the M2 threaded hole on the eyepiece adapter 11 with the slot 1004 on the outer cylinder 10, and screw in an M2 screw.

[0138] 3. Connect and secure the assembled outer cylinder 10 to the CMOS mounting base 1201 with screws (the CMOS mounting base 1201 is connected to the connecting part 1002 of the outer cylinder 10). Then insert the entire assembly from the rear end of the handle housing 13, align the three openings at the front end of the handle housing 13 with the three threaded holes on the connecting part 1002 of the outer cylinder 10, and tighten the screws to secure it.

[0139] 4. Insert the focusing wheel 9 from the front end of the outer cylinder 10, so that the M2 screw on the eyepiece adapter lens 11 is aligned with the second groove 901 on the focusing wheel 9. Then, insert the focusing wheel fixing cover 14 from the front end of the outer cylinder 10, align the three openings on the focusing wheel fixing cover 14 with the threaded holes on the outer cylinder 101, and screw in the fastening screws.

[0140] 5. Connect the FPC cable of the CMOS imaging system 1204 to the cable on the handle tail cover 15, insert the connected cable into the handle housing 13, and connect the handle housing 13 and the handle tail cover 15.

[0141] Fiber and image fiber separation design: The front ends of both the illumination fiber 4 and the image fiber 1 are encased inside the main lens tube 2. After the tail ends extend from the main lens tube 2, the illumination fiber 4 converges into a single strand and extends out from the slot (first notch 3031) at the tail of the image fiber base 3. The image fiber 1 is inserted into the central hole of the image fiber base 5 along the center line of the image fiber base 3. The illumination fiber 4 extending from the side is passed through the first through hole 602 of φ1.2mm on the image fiber base fixing cover 6. Then, the illumination fiber 4 is passed through a stainless steel tube. After applying glue to the inside and outside of the stainless steel tube, the tube is pushed into the first through hole 602 on the image fiber base fixing cover 6. After the glue cures, the end face of the illumination fiber 4 is ground and polished.

[0142] III. Focusing Principle

[0143] Adjusting the front and back position of the eyepiece inside the outer tube can adjust the clarity of the image, while adjusting the front and back position of the eyepiece adapter inside the outer tube can adjust the size of the image on the display screen.

[0144] IV. Eyepiece focusing method and the function of the adapter lens

[0145] The eyepiece is installed inside the outer tube. The eyepiece tube has an M2 threaded hole, and the outer tube sidewall has a 45° axial groove. Insert the eyepiece into the outer tube, align the threaded hole on the eyepiece tube with the groove on the outer tube sidewall, and screw an M2 screw through the groove into the threaded hole on the eyepiece tube. The eyepiece will then move back and forth along the groove on the outer tube sidewall, adjusting the image sharpness.

[0146] The eyepiece adapter adjusts the size of the image on the CMOS sensor module, which is directly reflected in the size change of the image on the display screen.

[0147] V. Sensor assembly requirements and connection between base and lens

[0148] Place the filter and lens hood into the CMOS mount in sequence. Then, place the CMOS imaging system on the CMOS mount and screw in two M2 screws. Adjust the position of the CMOS imaging system mounting plate on the CMOS mount to ensure that the line of sight and the center line of the CMOS mount are aligned. Then, tighten the two M2 screws to fix the mounting plate. Next, adjust the three screws on the back of the mounting plate to adjust the parallelism between the CMOS photosensitive surface and the standard image surface to ensure that there is no distortion around the edges of the image. Finally, apply UV glue to the three screws and let it cure to prevent the screws from loosening and affecting the parallelism of the photosensitive surface.

[0149] VI. Optical path orientation, optical cone function, and optical path limiting design

[0150] Imaging optical path: The external image is refracted by the self-focusing imaging objective lens, causing the light to converge on the front surface of the image fiber. The image is then transmitted to the rear surface of the image fiber using the principle of light transmission through the image fiber. The light is then transmitted to the CMOS image sensor through the refraction of the eyepiece and eyepiece adapter, and finally output as a signal.

[0151] Illumination optical path: During the production of the fiber optic lens, the illumination fiber optic strands are wrapped around the self-focusing imaging objective and the image fiber, and then inserted into the main lens tube. The ends of the fiber optic strands are joined together and glued to the image fiber mount cover. The illumination fiber optic strands in the camera handle extend from the front end of the outer cylinder through a hole on the side wall of the outer cylinder to the rear end, then through the space reserved on the CMOS mount to the rear end of the handle, and finally extend from the handle tail sleeve to connect to the cold light source host, providing an illumination source for the fiber optic lens.

[0152] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fiber optic lens and camera connection structure, characterized in that, include: The camera unit includes an outer tube (10), an eyepiece adapter (11), and a handle housing (13). The rear end of the outer tube (10) is located inside the handle housing (13), and the front end is exposed outside the front end of the handle housing (13). The eyepiece adapter (11) is connected inside the front end of the outer tube (10). The fiber optic end unit includes an image fiber (1), an image fiber base (3), and a connector. The connector is connected to the rear end of the image fiber base (3). The rear end of the image fiber (1) passes through the central hole of the connector, and the front end protrudes from the front end of the image fiber base (3). The rear end of the connector and the front end of the outer cylinder (10) are connected by a plug-in structure, and the fiber lens part and the camera part are connected and fixed by a fixing device. When the fiber lens part and the camera part are connected, the rear end of the image fiber (1) is close to the eyepiece adapter lens (11).

2. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The plug-in structure includes a plug-in part and a mating part; The insertion part is located on the rear end face of the fiber optic base fixing cover (6) or the front end face of the outer cylinder (10); the mating part is located on the front end face of the outer cylinder (10) or the rear end face of the fiber optic base fixing cover (6). When the fiber lens section and the camera section are connected, the plug-in section is inserted into the mating section, and the rear end face of the fiber seat fixing cover (6) and the front end face of the outer cylinder (10) are in contact. Preferably, the insertion part is any one of a pin, a buckle, a mortise, and a boss, and the mating part is any one of a pin hole, a groove, a tenon, and a bayonet.

3. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The fixing device includes a fastening handwheel (7); The fastening handwheel (7) is a hollow structure. The rear end of its inner ring is provided with a threaded part, and the front end is provided with an inwardly protruding annular protrusion (701). The front end of the outer periphery of the fiber optic base (3) has an annular step structure, and the front end of the outer periphery of the outer cylinder (10) is provided with a front thread. The fastening handwheel (7) is fitted on the fiber optic base (3). The inner wall of the front annular protrusion (701) abuts against the annular step structure on the fiber optic base (3), and the threaded part at the rear end is connected to the front thread of the outer periphery of the outer cylinder (10). The fixing device also includes a locking nut (8), which is fitted onto and connected to the outer wall of the fiber optic base (3), with the rear end face of the locking nut (8) abutting against the front end face of the fastening handwheel (7).

4. The fiber optic lens and camera connection structure according to any one of claims 1-3, characterized in that, The connector includes a fiber optic mount (5) and a fiber optic mount fixing cover (6); The fiber optic mount (5) has a front end and a rear end. The front end of the fiber optic mount (5) is connected to the rear end of the fiber optic mount base (3), and the rear end is exposed outside the fiber optic mount base (3). The fiber optic mounting cover (6) covers the rear end of the fiber optic mount (5) and is connected to the fiber optic mount base (3).

5. The fiber optic lens and camera connection structure according to claim 4, characterized in that, The rear end opening of the fiber optic base (3) is provided with a recessed annular platform (305), and the front end of the fiber optic base (5) is connected to the annular platform (305). The outer periphery of the rear end of the fiber optic mount (5) is provided with a protruding ridge (501), and the inner wall of the fiber optic mount fixing cover (6) is provided with a first groove (603). The rear end of the fiber optic mount (5) is inserted into the inner hole of the fiber optic mount fixing cover (6), and the protruding ridge (501) is located in the first groove (603). The insertion part or mating part is provided on the rear end face of the fiber optic seat fixing cover (6); After the fiber optic lens and the camera lens are connected, the rear end face of the fiber optic mounting cover (6) and the front end face of the outer cylinder (10) are attached.

6. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The fiber optic section also includes a main lens tube (2) and an illumination fiber optic filament (4). The main lens tube (2) is connected to the front end inside the image fiber base (3) and is partially exposed. The rear end of the image fiber (1) is connected inside the image fiber holder (5) and protrudes from the rear end of the image fiber holder (5); the rear end of the illumination fiber filament (4) is connected inside the image fiber holder fixing cover (6) and is flush with the rear end face of the image fiber holder fixing cover (6); the front end of the image fiber (1) and the front end of the illumination fiber filament (4) are both located at the front end inside the main lens tube (2). The front end of the image fiber (1) is provided with a self-focusing imaging objective lens (101); the outer wall of the main mirror tube (2) is also fitted with a main mirror support tube inner tube (201) and a main mirror support tube outer tube (202) in sequence, and the front ends of the main mirror support tube inner tube (201) and the main mirror support tube outer tube (202) are flush with the front end of the image fiber base (3).

7. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The outer cylinder (10) includes an outer cylinder body (1001), a connecting part (1002) and an inner cylinder body (1003). The connecting part (1002) is connected to the rear end face of the inner cylinder body (1003), and the outer peripheral dimension of the connecting part (1002) is larger than the outer peripheral dimension of the inner cylinder body (1003). The connecting part (1002) is located inside the handle housing (13) and is fixedly connected to the front end of the handle housing (13); the inner cylinder (1003) protrudes from the front end of the handle housing (13); The outer cylinder (1001) is fitted around the front end of the outer periphery of the inner cylinder (1003), and the inner diameter of the outer cylinder (1001) is compatible with the outer diameter of the fiber optic mounting cover (6); the outer walls of the outer cylinder (1001) and the inner cylinder (1003) are provided with through slots (1004). When the fiber lens section and the camera section are connected, the outer ring of the fiber seat fixing cover (6) is connected to the inner ring of the outer cylinder (1001), and the rear end face of the fiber seat fixing cover (6) is attached to the front end face of the inner cylinder (1003). The inner cylinder (1003) is provided with a second through hole (1007), and the outer wall of the connecting part (1002) is provided with a second notch (1008), the second notch (1008) and the second through hole (1007) are connected; The second through hole (1007) and the illumination fiber filament (4) inside the fiber optic mounting cover (6) are coaxially arranged.

8. The fiber optic lens and camera connection structure according to claim 4, characterized in that, The fiber optic base (3) is a three-section cylindrical structure, including a front section (301), a middle section (302) and a rear section (303) with increasing outer diameters. The front section (301) and the middle section (302) are connected by a small hole (304). The rear section (303) has a recessed annular platform (305) at the end opening. The front end of the fiber optic base (5) is in close contact with the annular platform (305) on the fiber optic base (3). The rear section (303) of the image fiber base (3) has a first notch (3031) on its outer wall. One end of the illumination fiber filament (4) is connected to the image fiber base fixing cover (6), and the other end passes through the first notch (3031) and is connected to the main lens tube (2) on the image fiber base (3).

9. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The camera unit also includes a focusing dial (9), the eyepiece adapter (11) is connected to the outer cylinder (10) along the axial direction of the outer cylinder (10), and the outer cylinder (10) has a groove (1004) on its wall. The focusing dial (9) is fitted on the outer wall of the outer cylinder (10), and the inner wall of the focusing dial (9) is provided with a second groove (901). The outer wall of the eyepiece adapter (11) is connected to an adjustment rod; the top of the adjustment rod passes through the slot (1004) and is located in the second groove (901). The slot (1004) is inclined to the axis of the outer cylinder (10). When the focusing wheel (9) is rotated, the eyepiece adapter (11) can move along the axis of the outer cylinder (10) to get closer to or away from the rear end of the image fiber (1). The camera unit also includes a focus dial fixing cover (14), which is fitted onto the outer wall of the outer cylinder (10) and fixedly connected thereto. The focus dial (9) is located between the front end of the focus dial fixing cover (14) and the handle housing (13).

10. The fiber optic lens and camera connection structure according to claim 1, characterized in that, The rear end of the outer cylinder (10) is connected to a camera device (12), which is located inside the handle housing (13); The camera device (12) includes a CMOS mounting base (1201), a filter (1202), a lens hood (1203), and a CMOS imaging system (1204) arranged in sequence. The CMOS imaging system (1204) is installed on the side of the CMOS mounting base (1201), and the filter (1202) and the lens hood (1203) are located in the middle of the two. The front end of the CMOS mounting base (1201) is provided with a protruding cylindrical structure (12011). By inserting the cylindrical structure (12011) into the rear end of the outer cylinder (10) and then fixing it through a connecting device, the connection between the outer cylinder (10) and the camera device (12) is realized.

11. A connection method for the fiber optic lens and camera connection structure according to claim 1, characterized in that, include: Install a self-focusing imaging objective lens (101) at the front end of the image fiber (1) and connect the illumination fiber filament to the outer periphery of the front end of the image fiber (1); pass the rear end of the image fiber (1) through the central hole of the image fiber holder (5) and make the rear end of the image fiber (1) protrude 0.05-0.15mm from the central hole of the image fiber holder (5); The autofocusing imaging objective (101) is passed through the fiber mount base (3) and extends out of the front end of the fiber mount base (3). The front end of the fiber mount (5) is inserted into the rear end of the fiber mount base (3), and the rear end of the fiber mount (5) is exposed. The fiber mount fixing cover (6) covers the exposed part of the fiber mount (5) and is connected to the fiber mount base (3). Connect the camera device (12) to the rear end of the outer tube (10), connect the eyepiece adapter (11) to the front end of the outer tube (10), connect the outer tube (10) and the handle housing (13), and make the rear end of the outer tube (10) located inside the handle housing (13) and the front end of the outer tube (10) exposed at the front end of the handle housing (13); The rear end of the fiber mount fixing cover (6) and the front end of the outer cylinder (10) are connected by a plug-in structure, and the fiber lens part and the camera part are connected and fixed by a fixing device; after the fiber lens part and the camera part are connected, the rear end of the fiber (1) is close to the eyepiece adapter lens (11).

12. A ductoscope comprising the fiber endoscope and camera connection structure as described in any one of claims 1-9.

Images