Front end member, insertion portion, endoscope, and front end member assembly method

Abstract

The present invention provides a front end component, an insertion portion, an endoscope, and a front end component assembly method, which relates to the field of endoscope technology and solves the problem of water seepage in the front end component under the glue dispensing process in the prior art. The receiving part of the present invention is provided with a mounting hole that passes through from the proximal end to the distal end, and the receiving part is provided with a mounting area on the side of the mounting hole; the instrument tube extends from the proximal end to the distal end, and includes a first tube and a second tube that is connected to the distal end of the first tube, and at least part of the second tube section is passed through the mounting hole and forms an annulus between it and the mounting hole; wherein, the first tube has a lower friction coefficient and a lower surface energy than the second tube; the adhesive is filled in the annulus to bond and fix the second tube and the mounting hole, and to seal the annulus to prevent liquid from leaking to the proximal end through the annulus. The present invention uses tubes with different adhesive properties to form the instrument tube, so that the tube with better adhesiveness is bonded and fixed to the receiving part by the adhesive and the annulus is sealed, so as to form a stable sealing structure.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a front end component, an insertion portion, an endoscope, and an assembling method of the front end component. Background Art

[0002] A handheld medical endoscope typically consists of a handle and an insertion section connected to the handle for insertion into a natural body cavity. The insertion section includes a camera assembly and an illumination assembly at the distal end. An instrument tube extends from the handle and runs along the interior of the insertion section until it is exposed at the distal end, creating a channel for water and / or air flow and / or for the passage of instruments.

[0003] The instrument tube passes through the sides of the camera assembly and the lighting assembly and is installed together on the front end seat to form a front end assembly.

[0004] Currently, there are two common manufacturing methods for front-end components:

[0005] 1. After the instrument tube, camera assembly, and lighting assembly are assembled with the front-end seat, glue is applied to the fitting gap using a dispensing process to prevent water from leaking through the fitting gap around the instrument tube. Due to the small space at the distal end of the insertion part, the fitting gap around the instrument tube is very small. The glue often fails to completely fill the gap, resulting in defects. This not only easily leads to water seepage, but also to unstable connections of the instrument tube, which in turn exacerbates the water seepage problem. In particular, when a non-adhesive material is used for the instrument tube to create less friction for the shuttle instrument, the fitting gap becomes more difficult to seal, and water seepage becomes even more problematic. Therefore, water seepage at the distal end of the insertion part is a common problem during clinical trials or manufacturing processes. Furthermore, precisely because the distal end of the insertion part has a small space, water seepage can easily lead to a situation where there is no light or shadow, or water blocks the lens.

[0006] Second, after the instrument tube, camera assembly, and lighting assembly are positioned, they are assembled using a one-piece injection molding process. This manufacturing method ensures that the distal end of the front-end assembly is a single piece, generally eliminating the gap seepage problem seen in the first manufacturing method. However, this manufacturing method is complex and the manufacturing cost is much higher than the first method. Summary of the Invention

[0007] The purpose of the present invention is to design a front end component, an insertion portion, an endoscope and a front end component assembly method to solve the problem that the front end component is prone to water seepage during the dispensing process.

[0008] The present invention is achieved through the following technical solutions:

[0009] The present invention provides a front end component, including a receiving part, an instrument tube and an adhesive; the receiving part is provided with a mounting hole that passes through from the proximal end to the distal end, and the receiving part is also provided with a mounting area for mounting a camera lighting module on the side of the mounting hole; the instrument tube extends from the proximal end to the distal end, including a first tube and a second tube connected to the distal end of the first tube, at least part of the second tube is passed through the mounting hole and forms an annulus between it and the mounting hole; wherein, the first tube has a lower friction coefficient and lower surface energy than the second tube; the adhesive is filled in the annulus to bond and fix the second tube and the mounting hole, and seal the annulus to prevent liquid from leaking to the proximal end through the annulus.

[0010] The present invention provides an insertion part, which includes a snake bone, a camera lighting module and the above-mentioned front end component; the distal end of the snake bone is connected to the proximal end of the receiving component of the front end component, and the camera lighting module is installed in the installation area where the receiving component is set.

[0011] The present invention provides an endoscope, which includes the above-mentioned insertion portion.

[0012] The present invention provides a method for assembling a front end component, which is directed to assembling the front end component and comprises the following steps:

[0013] installing the second tube into the mounting hole;

[0014] passing a mandrel through the second tube;

[0015] Filling the trough with the adhesive to a level that does not exceed the proximal end of the second tube;

[0016] Sleeving the first tube onto the mandrel and axially moving the first tube from a first axial position outside the sink to a second axial position inside the sink, so that the distal end of the expanded diameter section contacts the bottom of the sink and forms a seal with the bottom of the sink;

[0017] The first tube is further moved axially from the second axial position to a third axial position, so that the distal end of the expanded diameter section moves from the first radial position away from the axis to the second radial position close to the axis under the guidance of the groove bottom to form a drum-shaped section, and the adhesive located inside the expanded diameter section is pushed by the third tube to flow toward the distal end to gradually fill the annulus;

[0018] The adhesive is allowed to cure and the mandrel is removed.

[0019] The present invention has the following advantages and beneficial effects:

[0020] In the present invention, the instrument tube is formed by axially connecting two tubes with different adhesive properties. The second tube, which is easier to bond, is placed on the distal end and used to bond and fix it to the mounting hole of the receiver. This ensures that the adhesive in the annulus more firmly bonds and fixes the second tube to the mounting hole without detaching, forming a more stable sealing structure in the annulus to effectively prevent liquid from entering the annulus and leaking toward the proximal end, which can, to a certain extent, solve the problem of water seepage in the front-end component. The first tube, which has poorer adhesive properties, is placed on the proximal end and can utilize its low friction properties to provide a smooth feel for the instrument passing through it. Therefore, the front-end component using a double-material instrument tube can ensure good sealing at the distal end while taking into account the smooth operation of the instrument using a dispensing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the structure of an endoscope;

[0023] Figure 2 The structure of the distal end side of the front end member is shown;

[0024] Figure 3 The structure of the proximal end side of the front end member is shown;

[0025] Figure 4 Shows the longitudinal section structure of the receiving member;

[0026] Figure 5 The longitudinal section structure of the insertion portion in which the first tube and the third tube are separately sleeved is shown;

[0027] Figure 6 yes Figure 5 Enlarged view of part A in the middle;

[0028] Figure 7 The figure shows a situation in which the first tube is in a first axial position during the axial docking process between the first tube and the second tube;

[0029] Figure 8 The figure shows a situation in which the first tube is in the second axial position during the axial docking process between the first tube and the second tube;

[0030] Figure 9 yes Figure 8 Enlarged view of middle part B;

[0031] Figure 10The second tube is shown with the mandrel inserted into it;

[0032] Figure 11 yes Figure 10 Enlarged view of the middle C section;

[0033] Figure 12 The structure of the first tube and the third tube formed integrally is shown.

[0034] The following are marked in the figure:

[0035] 1000, insertion part;

[0036] 100, receiving element; 100a, remote base; 100b, circuit board; 101, mounting hole; 101a, first through hole; 101b, second through hole; 1011, sink; 1011a, bottom of the sink; 102, mounting area;

[0037] 200, instrument tube; 201, first tube; 202, second tube; 203, third tube; 203a, drum-shaped section; 2031, straight section; 2032, expanded diameter section; 2033, window; 2034, deformation groove;

[0038] 300, camera lighting module;

[0039] 400, annulus;

[0040] 500, adhesive;

[0041] 600, snake bones;

[0042] 2000, mandrel;

[0043] 3000. Handle. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0045] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0046] The terms "first," "second," and so forth in the specification and claims of this application are used to distinguish similar objects, not to describe a specific order or precedence. It should be understood that such terms are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein. Furthermore, the objects distinguished by "first," "second," and so forth generally refer to a class and do not limit the number of objects. For example, the first object can be one or more. Furthermore, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects are in an "or" relationship. It should also be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be understood broadly. For example, they can mean fixed, removable, or integral; mechanically or electrically connected; directly or indirectly through an intermediary. A person of ordinary skill in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0048] The present invention provides a front end component, an insertion portion, an endoscope, and a method for assembling the front end component. The front end component uses a double tube with different bonding properties as the instrument tube 200, allowing the tube with better bonding performance to be assembled with the mounting hole 101 of the receiving component 100 and the assembly gap to be sealed by the adhesive 500, and allowing the tube with worse bonding performance but better lubricity to serve as the main channel of the instrument tube 200 to provide low-friction guiding capability for the instrument, which can ensure good sealing of the distal end while taking into account the smoothness of the instrument operation.

[0049] The following is combined with Figures 1-12 , a front end component, an insertion portion, an endoscope and a front end component assembly method provided in this application are described in detail through specific embodiments and their application scenarios.

[0050] In one aspect, the present invention provides a front end member, which is a component of the insertion portion 1000 of an endoscope, such as Figure 2-Figure 12 As shown:

[0051] The front end member includes a receiver 100, an instrument tube 200 mounted on the receiver 100, and an adhesive 500 that bonds and secures the instrument tube 200 to the receiver 100. The adhesive 500 also seals the assembly gap between the instrument tube 200 and the receiver 100, preventing liquid from leaking proximally from the gap.

[0052] The receiving member 100 is provided with a mounting hole 101, which runs through the receiving member 100 axially from the proximal end to the distal end for inserting the instrument tube 200. The receiving member 100 is also provided with a mounting area 102 located on the side of the mounting hole 101 for installing the camera lighting module 300.

[0053] The internal passageway of the instrument tube 200 serves as a channel for the shuttle of instruments and, in some cases, also for the circulation of water or gas. The instrument tube 200 extends axially from the proximal end to the distal end, terminating at the distal end of the receiver 100. The instrument tube 200 comprises a first tube 201 and a second tube 202 of equal inner diameter. The distal end of the first tube 201 axially abuts the proximal end of the second tube 202, forming a necessary seal at the abutment to prevent leakage of materials inside and outside the instrument tube 200 through the abutment seam. At least a portion of the second tube 202 extends through the mounting hole 101, forming an annular space (annulus 400) between the second tube 202 and the mounting hole 101. This annulus 400 is used to accommodate the adhesive 500.

[0054] First tube 201 has a lower surface energy than second tube 202, making it more difficult to bond. Furthermore, first tube 201 has a lower coefficient of friction than second tube 202. First tube 201 can be made of PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene propylene copolymer), or HDPE (high-density polyethylene), while second tube 202 can be made of stainless steel, titanium alloy, or rubber.

[0055] The adhesive 500 fills the annulus 400 to bond and fix the second pipe 202 and the mounting hole 101 together. At the same time, after curing, the adhesive 500 will seal the annulus 400 to prevent liquid from leaking to the proximal end through the annulus 400.

[0056] In some embodiments, as Figure 3 and Figure 4As shown, the receiving member 100 includes a distal base 100a and a circular circuit board 100b mounted on a proximal step of the distal base 100a. The mounting hole 101 includes a first through-hole 101a provided in the distal base 100a and a second through-hole 101b provided eccentrically on the circuit board 100b, with the distal end of the second through-hole 101b abutting the proximal end of the first through-hole 101a. Of course, the receiving member 100 may also include only the distal base. In this case, the distal base itself provides a complete mounting hole for mounting the second tube 202, while the circuit board 100b is designed as a half-moon-shaped plate, which is roughly positioned on the instrument tube 200 by means of an inner arc groove.

[0057] In some embodiments, the second tube 202 may be Figure 6 As shown in FIG, the second tube 202 is completely located in the mounting hole 101. Of course, in other embodiments, the proximal end of the second tube 202 may also exceed the proximal end of the mounting hole 101.

[0058] In this embodiment, the instrument tube 200 is constructed by axially butting two tubes with different adhesive properties. The second tube 202, which is more easily bonded, is positioned at the distal end and used to bond and secure it to the mounting hole 101 of the receiver 100. This ensures that the adhesive 500 in the annulus 400 secures the second tube 202 to the mounting hole 101 more firmly, preventing it from separating. This creates a more stable seal within the annulus 400, effectively preventing liquid from entering the annulus 400 and leaking proximally. This, to a certain extent, addresses the issue of water seepage in the front-end assembly. The first tube 201, with its less adhesive properties, is positioned at the proximal end, leveraging its low-friction properties to provide a smooth feel for instruments traversing it. Therefore, the front-end assembly of the dual-material instrument tube 200 can ensure good distal sealing while ensuring smooth instrument operation using a dispensing process.

[0059] According to some optional embodiments, reference Figure 5 The distal end of the first tube 201 located on the proximal side of the instrument tube 200 extends into the mounting hole 101. Simultaneously, the adhesive 500 circumferentially wraps around the first tube 201 within the mounting hole 101, radially limiting the distal end of the first tube 201 and preventing displacement of the first tube 201, which could affect the coaxiality of the first tube 201 and the second tube 202. In this embodiment, when the distal end of the first tube 201 is located in the mounting hole 101, the adhesive 500 in the mounting hole 101 can be used to wrap around the portion of the first tube 201 extending into the mounting hole 101, preventing radial displacement of the first tube 201 and ensuring the quality of the connection between the first tube 201 and the second tube 202.

[0060] According to some optional embodiments, Figure 4 As shown, the proximal end of the mounting hole 101 provided in the receiving member 100 is radially enlarged to form a recessed groove 1011 .

[0061] In this embodiment and some other embodiments, the sink 1011 is provided at the second through hole 101 b provided on the circuit board 100 b.

[0062] like Figure 5 、 Figure 6 、 Figure 10-12 As shown, the instrument tube 200 includes a first tube 201, a second tube 202 and a third tube 203. The third tube 203 has a certain elasticity and is fixedly sleeved on the first tube 201. The distal end of the third tube 203 extends axially beyond the distal end of the first tube 201.

[0063] For example, the third tube 203 and the first tube 201 are fixed by welding, interference fitting, adhesive bonding or the like. Figure 12 As shown in the figure, it is integrally formed.

[0064] When the first tube 201 and the second tube 202 are axially connected, the distal end of the third tube 203 is located within the recessed groove 1011 and abuts the groove bottom 1011a of the recessed groove 1011, forming a seal at the contact point between the distal end of the third tube 203 and the groove bottom 1011a. Due to the axial contact with the groove bottom 1011a, the third tube 203 elastically deforms, forming a radially outwardly curved drum-shaped section 203a from its distal end to its proximal end.

[0065] The distal end of the third tube 203 is at a certain distance from the outer circumference of the second tube 202 , so that a gap is formed between the distal end of the third tube 203 and the outer circumference of the second tube 202 .

[0066] The adhesive 500 fills the inner and outer sides of the drum-shaped segment 203a and maintains the elastic deformation of the drum-shaped segment 203a, so that the adhesive 500 located inside and outside the drum-shaped segment 203a and the drum-shaped segment 203a form a curved hooking structure.

[0067] In this embodiment, a gap is formed between the distal end of the third tube 203 and the outer circumferential surface of the second tube 202 so that the adhesive 500 can flow axially from the sink 1011 to the distal end when pushed by the third tube 203 .

[0068] In this embodiment, the material of the third tube 203 may be the same as or different from that of the first tube 201 .

[0069] In this embodiment, the recessed groove 1011 provided at the proximal end of the mounting hole 101 provides radial space and an axial stop for the third tube 203, which is sleeved onto the first tube 201. As the first tube 201 and the second tube 202 axially converge, the third tube 203 is blocked when its distal end contacts the bottom 1011a of the recessed groove 1011, allowing the third tube 203 to bend radially outward to form a drum-shaped segment 203a. This drum-shaped segment 203a forms a hooking structure with the adhesive 500, effectively preventing the first tube 201 from axially retreating proximally and from radially displacing.

[0070] According to some optional embodiments, Figure 5 and Figure 6 As shown, the bottom 1011a of the sink 1011 is configured as an inner arc surface with a diameter gradually expanding from the distal end to the proximal end.

[0071] The third tube 203 includes a straight section 2031 fixedly sleeved on the first tube 201 and an enlarged diameter section 2032 connected to the straight section 2031. The inner diameter of the straight section 2031 is equal to or slightly smaller than the outer diameter of the first tube 201.

[0072] For example, the straight section 2031 of the third tube 203 and the first tube 201 can be as follows Figure 5-Figure 11 As shown in the figure, the straight section 2031 of the third tube 203 is connected to the sleeve portion of the first tube 201 by welding, interference fitting or bonding. The straight section 2031 of the third tube 203 and the first tube 201 can also be connected as shown in the figure. Figure 12 As shown in the figure, it is integrally formed.

[0073] The diameter expansion section 2032 expands from the distal end of the straight section 2031 toward the distal end, so that the inner diameter of the diameter expansion section 2032 is larger than the inner diameter of the straight section 2031. Figure 6 As shown, when the first tube 201 and the second tube 202 are axially connected, the distal end of the expanded diameter section 2032 abuts against the groove bottom 1011a of the sink 1011, so that the part of the expanded diameter section 2032 between the distal end and the proximal end is radially bent outward to form a drum-shaped section 203a.

[0074] In this embodiment, before the first tube 201 and the second tube 202 are axially connected, the adhesive 500 is injected from the proximal end of the sink 1011 by dispensing and pre-placed in the sink 1011 .

[0075] Reference in order Figure 7 、 Figure 9 and Figure 6In the process of the first pipe 201 axially docking with the second pipe 202, the distal end of the expanded diameter section 2032 points to the groove bottom 1011a, and the distal end of the expanded diameter section 2032 forms a seal with the groove bottom 1011a when in contact with the groove bottom 1011a to separate the inner and outer sides of the expanded diameter section 2032. Afterwards, the distal end of the expanded diameter section 2032 can be guided by the groove bottom 1011a from the first radial position away from the axis to the second radial position close to the axis to gradually form a drum-shaped section 203a, and then the adhesive 500 located on the inner side of the expanded diameter section 2032 is pushed toward the distal end through the third pipe 203 to gradually fill the annulus 400.

[0076] In this embodiment, the bottom 1011a of the trough 1011 is designed to be an inner arc surface that gradually expands from the distal end to the proximal end. The bottom 1011a can provide a clear guide toward the axis for the distal end of the third tube 203, so that the distal end of the expanded diameter section 2032 of the third tube 203 can move close to the axis to gradually form a drum-shaped section 203a. In this way, the inner volume of the drum-shaped section 203a can be effectively controlled, so that in the process of the expanded diameter section 2032 gradually invading the trough 1011, the adhesive 500 located on the inner side of the expanded diameter section 2032 has a better convergence effect and a pushing effect toward the distal end, so that the adhesive 500 can better move toward the distal end of the annulus 400, ensuring the filling effect of the adhesive 500 around the second tube 202, and finally obtaining a more stable sealing structure.

[0077] According to some optional embodiments, Figure 12 As shown, the third tube 203 is provided with a window 2033 on the peripheral wall of the expanded diameter section 2032 thereof, and the window 2033 is provided adjacent to the distal end of the expanded diameter section 2032. Figure 5 、 Figure 6 and Figure 10 、 Figure 11 As shown, when the first tube 201 and the second tube 202 are axially connected, the distal end of the expanded diameter section 2032 abuts against the bottom 1011a of the sink 1011 to form a drum-shaped section 203a. At this time, the window 2033 is filled with adhesive 500, and the periphery of the window 2033 is sealed against the bottom 1011a, so that the adhesive 500 located inside and outside the drum-shaped section 203a will not flow through the window 2033.

[0078] In this embodiment, the window 2033 provided on the peripheral wall of the expanded diameter section 2032 allows the adhesive 500 to be fully filled into the window 2033 during the process of the expanded diameter section 2032 penetrating the sink 1011. After the first tube 201 and the second tube 202 are docked, the expanded diameter section 2032 forms a drum-shaped section 203a. The adhesive 500 in the window 2033 provides an anchor point for the drum-shaped section 203a, effectively preventing the first tube 201 from retreating axially toward the proximal end and from displacing radially.

[0079] According to some optional embodiments, Figure 9 As shown, the outer circumferential surface of the third tube 203 is provided with a circumferentially extending deformation groove 2034 at the connection between the expanded diameter section 2032 and the straight section 2031. When the expanded diameter section 2032 of the third tube 203 forms the drum section 203a, the expanded diameter section 2032 is radially folded outward relative to the straight section 2031, so that the deformation groove 2034 becomes as shown in FIG. Figure 6 In this embodiment, the deformation groove 2034 provided on the outer circumference of the third tube 203 at the connection between the expanded diameter section 2032 and the straight section 2031 is conducive to the deformation of the expanded diameter section 2032.

[0080] According to some optional embodiments, Figure 6 As shown, the straight section 2031 of the third tube 203 is sleeved onto the first tube 201, and the straight section 2031 extends beyond the distal end of the first tube 201 along the axis. When the first tube 201 and the second tube 202 are axially connected, the distal end of the straight section 2031 of the third tube 203 is also sleeved onto the second tube 202. The adhesive 500 in the sink 1011 wraps around the straight section 2031 and surrounds the joint between the first tube 201 and the second tube 202.

[0081] In this embodiment, the straight section 2031 sleeved on the second tube 202 is wrapped with adhesive 500 to clamp the third tube 203 in the radial direction, so that the third tube 203 is well limited in position, thereby ensuring that the first tube 201 is less likely to be radially displaced relative to the second tube 202.

[0082] According to some other optional embodiments, Figure 10 and Figure 11 As shown, the straight section 2031 of the third tube 203 is sleeved onto the first tube 201, with the distal end of the straight section 2031 of the third tube 203 located proximal to the distal end of the first tube 201. This creates a roughly triangular area in longitudinal cross-section between the expanded diameter section 2032 of the third tube 203 and the outer circumference of the first tube 201. When the first tube 201 and the second tube 202 are axially butted together, the joint between the first and second tubes 201, 202, is located within the recessed groove 1011. The adhesive 500 located inside the drum-shaped section 203a surrounds the joint between the first and second tubes 201, 202, and also fills the triangular area formed between the expanded diameter section 2032 and the outer circumference of the first tube 201.

[0083] In this embodiment, adhesive 500 is used to fill the triangular area between the expanded diameter section 2032 and the first tube 201 and surround the joint between the first tube 201 and the second tube 202, thereby providing good radial limitation for the first tube 201 and ensuring that the first tube 201 is less likely to be radially displaced relative to the second tube 202.

[0084] In another aspect, the present invention provides a method for assembling a front end component, which is for assembling the front end components in some of the above embodiments; the method comprises the following steps:

[0085] Step S1, installing the second tube 202 into the installation hole 101 provided in the receiving member 100;

[0086] Step S2, reference Figure 10 , passing the core rod 2000 through the second tube 202 so that the proximal end of the core rod 2000 exceeds the proximal end of the second tube 202, so that the core rod 2000 supports the second tube 202 from the inside and maintains the position of the second tube 202 in the mounting hole 101 to form a stable annulus 400.

[0087] In step S3 , a certain amount of adhesive 500 is added to the adhesive reservoir between the sink 1011 and the outer peripheral surface of the second tube 202 by dispensing, so that the adhesive 500 does not exceed the proximal end of the second tube 202 .

[0088] Step S4: put the first tube 201 onto the core rod 2000, and push the first tube 201 from the Figure 7 The first axial position shown outside the sink 1011 is moved axially to Figure 8 The second axial position shown is located in the sink 1011, so that the distal end of the expanded diameter section 2032 of the third tube 203 contacts the bottom 1011a of the sink and forms a seal with the bottom 1011a;

[0089] Step S5, the first tube 201 is further axially moved from Figure 8 The second axial position shown is moved to Figure 5 The third axial position shown in FIG. 1 is such that the distal end of the expanded diameter section 2032 of the third tube 203 is guided by the groove bottom 1011a from the bottom 1011a. Figure 8 The first radial position shown is moved to Figure 5 The second radial position shown forms the drum section 203 a , during which the adhesive 500 located inside the expanded diameter section 2032 is pushed by the third tube 203 to flow toward the distal end to gradually fill the annulus 400 .

[0090] Step S6: After the adhesive 500 is cured, the core rod 2000 is removed. The adhesive 500 may be a UV photosensitive adhesive. When the adhesive 500 needs to be cured, the adhesive 500 is irradiated with ultraviolet light to quickly cure the adhesive 500.

[0091] On the other hand, the present invention provides an inserting portion 1000, such as Figure 1 and Figure 5As shown, the insertion portion 1000 includes a serpentine 600, a camera and lighting module 300, and a front end member according to any of the above embodiments. The distal end of the first serpentine segment of the serpentine 600 is fixedly connected to the proximal end of the receiving member 100 of the front end member, and the camera and lighting module 300 is installed in the installation area 102 provided on the receiving member 100.

[0092] In another aspect, the present invention provides an endoscope, such as Figure 1 As shown, the endoscope includes the insertion portion 1000 and the handle 3000 in the above embodiment, and the proximal end of the insertion portion 1000 is connected to the handle 3000 .

[0093] The endoscope involved in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose any specific restrictions on the type of endoscope.

[0094] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0095] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0096] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A front end member for an endoscope, characterized in that: include: A receiving member (100) is provided with a mounting hole (101) extending from the proximal end to the distal end, and the receiving member (100) is further provided with a mounting area (102) for mounting the camera lighting module (300) on the side of the mounting hole (101); An instrument tube (200) extends from a proximal end to a distal end, comprising a first tube (201) and a second tube (202) connected to the distal end of the first tube (201), wherein at least a portion of the second tube (202) is passed through the mounting hole (101) and forms an annulus (400) between the second tube (202) and the mounting hole (101); wherein the first tube (201) has a lower friction coefficient and a lower surface energy than the second tube (202); Adhesive (500) is filled in the annulus (400) to bond and fix the second tube (202) and the mounting hole (101), and to seal the annulus (400) to prevent liquid from leaking to the proximal end through the annulus (400); The proximal end of the mounting hole (101) is configured as a sink (1011); The instrument tube (200) further comprises a third tube (203) fixedly sleeved on the first tube (201), the distal end of the third tube (203) extending beyond the distal end of the first tube (201) and contacting the bottom (1011a) of the trough (1011) to form a seal, the third tube (203) forming a radially outwardly curved drum section (203a) in an elastically deformed state from its distal end to its proximal end, and a gap being formed between the distal end of the third tube (203) and the outer peripheral surface of the second tube (202) for allowing the adhesive (500) to flow axially from the trough (1011) to the distal end; The adhesive (500) fills the inner and outer sides of the drum-shaped segment (203a) and maintains the elastically deformed shape of the drum-shaped segment (203a).

2. A front end component according to claim 1, characterized in that: The distal end of the first tube (201) is located in the mounting hole (101), and the adhesive (500) circumferentially wraps the first tube (201) within the mounting hole (101) to limit the radial position of the first tube (201).

3. A front end component according to claim 1, characterized in that: The sink groove (1011) is used for pre-setting the adhesive (500), and the bottom (1011a) of the sink groove (1011) is configured as an inner arc surface that gradually expands in diameter from the distal end to the proximal end; The third tube (203) comprises a straight section (2031) fixedly sleeved on the first tube (201) and an expanded diameter section (2032) connected to the straight section (2031) and having an inner diameter greater than that of the straight section (2031); the drum section (203a) is formed on the expanded diameter section (2032); In the process of the first tube (201) axially docking the second tube (202), the distal end of the expanded diameter section (2032) points to the groove bottom (1011a), and when the distal end of the expanded diameter section (2032) contacts the groove bottom (1011a), it can be guided by the groove bottom (1011a) to move from a first radial position away from the axis to a second radial position close to the axis to gradually form the drum-shaped section (203a), and can form a seal with the groove bottom (1011a), and then push the adhesive (500) located on the inner side of the expanded diameter section (2032) toward the distal end through the third tube (203) to gradually fill the annulus (400).

4. A front end component according to claim 3, characterized in that: A window (2033) is provided on the peripheral wall of the diameter-expanding section (2032); when the diameter-expanding section (2032) forms the drum-shaped section (203a), the peripheral edge of the window (2033) is sealed against the groove bottom (1011a), and the window (2033) is filled with the adhesive (500); And / or, the outer peripheral surface of the third tube (203) is provided with a circumferentially extending deformation groove (2034) at the connection between the expanded diameter section (2032) and the straight section (2031); And / or, the straight section (2031) and the first tube (201) are fixed by welding, interference fit, adhesive fixation, or integrally formed; And / or, the material of the first tube (201) is PTFE, FEP or HDPE, and the material of the second tube (202) is stainless steel, titanium alloy or rubber.

5. A front end component according to claim 3, characterized in that: The distal end of the straight segment (2031) is sleeved on the second tube (202), and the adhesive (500) located in the sink (1011) wraps the straight segment (2031) and surrounds the joint between the first tube (201) and the second tube (202); Alternatively, the distal end of the straight section (2031) is located on the proximal side of the distal end of the first tube (201), and the adhesive (500) located inside the drum-shaped section (203a) surrounds the joint between the first tube (201) and the second tube (202).

6. The front end component according to claim 1, characterized in that: The receiving member (100) comprises a distal seat (100a) and a circuit board (100b) mounted on the distal seat (100a); the mounting hole (101) comprises a first through hole (101a) provided on the distal seat (100a) and a second through hole (101b) provided on the circuit board (100b) and docked with the proximal end of the first through hole (101a); and the sink (1011) is provided in the second through hole (101b).

7. An inserting portion, characterized in that: The invention comprises a snake bone (600), a camera lighting module (300) and a front end component according to any one of claims 1 to 6; the distal end of the snake bone (600) is connected to the proximal end of a receiving component (100) of the front end component, and the camera lighting module (300) is installed at an installation area (102) provided on the receiving component (100).

8. An endoscope, characterized in that: The invention comprises the insertion portion according to claim 7.

9. A method for assembling a front end component, characterized in that: Assembling the front end component according to any one of claims 3 to 5; The following steps are involved: Installing the second tube (202) into the installation hole (101); Passing a mandrel (2000) through the second tube (202); Filling the adhesive (500) into the trough (1011) to a level that does not exceed the proximal end of the second tube (202); The first tube (201) is sleeved onto the core rod (2000) and axially moved from a first axial position outside the trough (1011) to a second axial position inside the trough (1011), so that the distal end of the expanded diameter section (2032) contacts the trough bottom (1011a) and forms a seal with the trough bottom (1011a); The first tube (201) is further moved axially from the second axial position to the third axial position, so that the distal end of the expanded diameter section (2032) moves from the first radial position away from the axis to the second radial position close to the axis under the guidance of the groove bottom (1011a) to form a drum-shaped section (203a), and the adhesive (500) located inside the expanded diameter section (2032) is pushed by the third tube (203) to flow toward the distal end to gradually fill the annulus (400); After the adhesive (500) is cured, the core rod (2000) is removed.

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