Front end component, insertion part, endoscope and front end component assembling method

Abstract

The invention provides a front-end component, an insertion part, an endoscope and a front-end component assembling method, relates to the technical field of endoscopes, and solves the problem that in the prior art, a front-end component is prone to water seepage in a dispensing process. The receiving piece is provided with a mounting hole penetrating from the near end to the far end, and the receiving piece is provided with a mounting area on the side of the mounting hole; the instrument tube extends from the near end to the far end and comprises a first tube and a second tube in butt joint with the far end face of the first tube, at least part of the tube section of the second tube is arranged in the mounting hole in a penetrating mode, and an annulus is formed between the second tube 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 annular space so as to adhere and fix the second pipe and the mounting hole and block the annular space so that the liquid can be prevented from leaking to the near end through the annular space. According to the invention, the instrument tube is formed by the tubes with different bonding properties, so that the tube with better bonding property and the receiving piece are bonded and fixed through the bonding agent and the annular space is blocked, and a stable sealing structure can be formed.

Description

Technical Field

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

[0002] A handheld medical endoscope usually consists of a handle and an insertion portion connected to the handle for inserting into the natural body cavity. The insertion portion includes a camera assembly and a lighting assembly located at the distal end. The instrument tube extends from the handle and passes through the inside of the insertion portion to expose at the distal end face, for establishing a channel for passing water and / or gas and / or for the instrument to shuttle through.

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

[0004] Currently, there are two common manufacturing methods for the front-end component: First, after the instrument tube, the camera assembly, and the lighting assembly are assembled with the front-end seat, a dispensing process is used to apply glue at the mating gaps to prevent water from leaking through the mating gaps around the instrument tube. Due to the small space at the distal end of the insertion portion, the mating gaps around the instrument tube are very small, and there are often defects such as incomplete filling of the glue in the gaps, which not only easily causes water leakage problems but also causes unstable connection of the instrument tube. The latter problem will further exacerbate the water leakage problem. Especially when a non-sticky glue material is selected for the instrument tube to cause less friction for the shuttling instrument, the mating gaps are even more difficult to seal, and the water leakage situation will become more intractable. Therefore, in the clinical trial or manufacturing process, the problem of water leakage at the distal end of the insertion portion often occurs. At the same time, precisely because the space at the distal end of the insertion portion is small, water leakage is very likely to cause the situation of no light and no shadow, or the situation where water blocks the lens.

[0005] Second, after the instrument tube, the camera assembly, and the lighting assembly are positioned, they are assembled together by an integral injection molding process. This manufacturing method makes the distal end face of the front-end component a whole, and generally there will be no problem of gap water leakage that appears in the first manufacturing method. However, this manufacturing method has a complex process, and the manufacturing cost is much higher than that of the first method. Summary of the Invention

[0006] The purpose of the present invention is to design a front-end component, an insertion portion, an endoscope, and a method for assembling the front-end component to solve the problem of easy water leakage of the front-end component under the dispensing process.

[0007] The present invention is achieved by the following technical solutions: 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 which 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 which is 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 the second tube 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 seals the annulus to prevent liquid from leaking to the proximal end through the annulus.

[0008] 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 a receiving component of the front end component, and the camera lighting module is installed in the installation area where the receiving component is set.

[0009] The present invention provides an endoscope, which includes the above-mentioned insertion portion.

[0010] The present invention provides a method for assembling a front end component, and the method is for assembling the front end component; the method comprises the following steps: installing the second tube into the mounting hole; passing a mandrel through the second tube; Filling the adhesive in the trough to a level not exceeding the proximal end of the second tube; The first sleeve is placed on the mandrel and axially moved from a first axial position outside the groove to a second axial position inside the groove, so that the distal end of the expanded diameter section contacts the groove bottom and forms a seal with the groove bottom; The first tube is further moved axially from the second axial position to the 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; The adhesive is allowed to cure and the mandrel is removed.

[0011] The present invention has the following advantages and beneficial effects: In the present invention, the instrument tube is axially butted by pipe fittings with two bonding characteristics. The second tube that is easier to bond is arranged on the distal side and used to bond and fix with the mounting hole of the receiving part, which can ensure that the adhesive in the annulus bonds and fixes the second tube and the mounting hole more firmly together without detachment, forming a more stable sealing structure in the annulus to effectively prevent liquid from entering the annulus and leaking proximally, and can solve the problem of easy water seepage of the front-end component to a certain extent. The first tube with poorer adhesiveness is arranged on the proximal side, and its low-friction characteristic can be used to provide a smooth feel for the instrument shuttling through it. Therefore, the front-end component using a dual-material instrument tube can ensure good distal sealing while taking into account the smoothness of instrument operation in the case of using the dispensing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of an endoscope; Figure 2 shows the structure of the distal side of the front-end component; Figure 3 shows the structure of the proximal side of the front-end component; Figure 4 shows the longitudinal sectional structure of the receiving part; Figure 5 shows the longitudinal sectional structure of the insertion part where the first tube and the third tube are sleeved separately; Figure 6 is Figure 5 an enlarged view of part A in; Figure 7 shows the situation where the first tube is in the first axial position during the axial butt joint of the first tube and the second tube; Figure 8 shows the situation where the first tube is in the second axial position during the axial butt joint of the first tube and the second tube; Figure 9 is Figure 8 an enlarged view of part B in; Figure 10 shows the situation where a mandrel is inserted into the second tube; Figure 11 is Figure 10 an enlarged view of part C in; Figure 12 shows the structure of the integrally formed first tube and third tube.

[0014] The markings in the figure are as follows: 1000, insertion part; 100, receiving part; 100a, distal seat; 100b, circuit board; 101, mounting hole; 101a, first through hole; 101b, second through hole; 1011, counterbore; 1011a, bottom of the groove; 102, mounting area; 200, instrument tube; 201, first tube; 202, second tube; 203, third tube; 203a, drum-shaped section; 2031, straight section; 2032, enlarged diameter section; 2033, window; 2034, deformation groove; 300, camera illumination module; 400, annulus; 500, adhesive; 600, snake bone; 2000, mandrel; 3000, handle. Detailed implementation manners

[0015] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0016] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0017] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means that the related objects before and after are in an "or" relationship. In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0018] In the embodiments of this application, "proximal end" and "distal end" refer to the relative distances of each component from the user in the usage environment. Among them, 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".

[0019] The present invention provides a front-end member, an insertion portion, an endoscope, and a method for assembling the front-end member. The front-end member uses a dual-material tube with different bonding properties as the instrument tube 200. Let the tube with better bonding performance be assembled with the mounting hole 101 of the receiving member 100 and seal the assembly gap with the adhesive 500. Let the tube with worse bonding performance but better lubricity be used as the main channel of the instrument tube 200 to provide a low-friction guiding ability for the instrument, which can ensure good sealing at the distal end while also taking into account the smoothness of instrument operation.

[0020] The following combines the attached Figures 1 - 12 , and through specific embodiments and their application scenarios, a front-end member, an insertion portion, an endoscope, and a method for assembling the front-end member provided by this application are described in detail.

[0021] On the one hand, the present invention provides a front-end member. The front-end member is a part of the insertion portion 1000 of the endoscope, as Figures 2 - 12 shown: The front-end member includes a receiving member 100, an instrument tube 200 installed on the receiving member 100, and an adhesive 500 that bonds and fixes the instrument tube 200 to the receiving member 100. At the same time, the adhesive 500 also serves to seal the assembly gap between the instrument tube 200 and the receiving member 100 to prevent liquid from leaking from their assembly gap to the proximal end.

[0022] An installation hole 101 is provided inside the receiving member 100. The installation hole 101 axially penetrates the receiving member 100 from the proximal end to the distal end for passing through the instrument tube 200. An installation area 102 is also provided inside the receiving member 100 on the side of the installation hole 101, and the installation area 102 is used for installing the camera illumination module 300.

[0023] The channel inside the instrument tube 200 serves as a channel for the instrument to shuttle through, and in some cases, also serves as a circulation channel for water or gas. The instrument tube 200 axially extends from the proximal end to the distal end and terminates at the distal end face of the receiving member 100. The instrument tube 200 includes a first tube 201 and a second tube 202 with equal inner diameters. The distal end face of the first tube 201 is axially butted against the proximal end face of the second tube 202, and a necessary seal is formed at the butting position to prevent substances inside and outside the instrument tube 200 from leaking through the butting seam. At least a part of the second tube 202 is inserted into the installation hole 101, and an annular space (annular space 400) is formed between the second tube 202 and the installation hole 101, and the annular space 400 is used to accommodate the adhesive 500.

[0024] The first tube 201 has a lower surface energy compared to the second tube 202, making the first tube 201 more difficult to bond. At the same time, the first tube 201 has a lower friction coefficient compared to the second tube 202. The material of the first tube 201 can be PTFE (polytetrafluoroethylene) or FEP (fluorinated ethylene propylene copolymer) or HDPE (high density polyethylene), and the material of the second tube 202 can be stainless steel or titanium alloy or rubber.

[0025] The adhesive 500 is filled in the annular space 400 to bond and fix the second tube 202 and the installation hole 101 together. At the same time, after the adhesive 500 cures, it will seal the annular space 400 to prevent liquid from leaking proximally through the annular space 400.

[0026] In some embodiments, such as Figure 3 and Figure 4 shown, the receiving member 100 includes a distal seat 100a and a circular circuit board 100b installed on the proximal step of the distal seat 100a. The installation hole 101 includes a first through hole 101a provided in the distal seat 100a and a second through hole 101b provided at an eccentric position on the circuit board 100b. The distal end of the second through hole 101b is butted against the proximal end of the first through hole 101a. Of course, the receiving member 100 can also only include the distal seat. In this case, the distal seat itself provides a complete installation hole for installing the second tube 202, and the circuit board 100b will be designed as a semi-circular board and is roughly positioned by being stuck on the instrument tube 200 through the inner arc groove.

[0027] In some embodiments, the second tube 202 can be as Figure 6is completely located within the mounting hole 101 as shown. Of course, in some other embodiments, the proximal end of the second tube 202 may also extend beyond the proximal end of the mounting hole 101.

[0028] In this embodiment, the instrument tube 200 is axially butted by two pipe fittings with different bonding characteristics. The second tube 202 with easier bonding property is arranged on the distal side and used to bond and fix with the mounting hole 101 of the receiving member 100, which can ensure that the adhesive 500 located in the annulus 400 bonds and fixes the second tube 202 and the mounting hole 101 more firmly together without detachment, forming a more stable sealing structure in the annulus 400 to effectively prevent liquid from entering the annulus 400 and leaking proximally, and can solve the problem of water seepage at the front-end assembly to a certain extent. The first tube 201 with poorer bonding property is arranged on the proximal side, and its low-friction property can provide a smooth feel for the instrument shuttling through it. Therefore, the front-end component of the dual-material instrument tube 200 can ensure good distal sealing while taking into account the smoothness of instrument operation when using the dispensing process.

[0029] According to some alternative embodiments, referring to Figure 5 , the distal end of the first tube 201 of the instrument tube 200 on the proximal side extends into the mounting hole 101. Meanwhile, the adhesive 500 circumferentially wraps the first tube 201 within the mounting hole 101 to radially limit the distal end of the first tube 201 to prevent the first tube 201 from displacing and affecting 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 within the mounting hole 101, the adhesive 500 in the mounting hole 101 can be used to wrap the part of the first tube 201 extending into the mounting hole 101, preventing the first tube 201 from radially displacing and ensuring the docking quality of the first tube 201 and the second tube 202 at the docking location.

[0030] According to some alternative embodiments, as Figure 4 shown, the proximal end of the mounting hole 101 provided in the receiving member 100 is radially enlarged to form a sink 1011.

[0031] In this embodiment and some other embodiments, the sink 1011 is provided at the second through hole 101b provided in the circuit board 100b.

[0032] As Figure 5 , Figure 6 , Figures 10 - 12 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, and the distal end of the third tube 203 axially extends beyond the distal end of the first tube 201.

[0033] Exemplarily, the third tube 203 is fixedly welded or press-fitted or adhesively fixed to the first tube 201 or integrally formed as shown in Figure 12 .

[0034] When the first tube 201 is axially butted against the second tube 202, the distal end of the third tube 203 is located within the sink groove 1011 and abuts against the bottom 1011a of the sink groove 1011, and a seal is formed at the abutting portion between the distal end of the third tube 203 and the bottom 1011a. The third tube 203 undergoes elastic deformation due to axially abutting against the bottom 1011a, such that a drum-shaped section 203a that is radially outwardly curved and in an elastically deformed state is formed from the distal end to the proximal end of the third tube 203.

[0035] The distal end of the third tube 203 has a certain distance from the outer peripheral surface of the second tube 202, such that a gap is formed between the distal end of the third tube 203 and the outer peripheral surface of the second tube 202.

[0036] The adhesive 500 fills the inner and outer sides of the drum-shaped section 203a and maintains the elastically deformed state of the drum-shaped section 203a, such that the adhesive 500 located on the inner and outer sides of the drum-shaped section 203a and the drum-shaped section 203a form a curved hook structure.

[0037] In this embodiment, a gap is formed between the distal end of the third tube 203 and the outer peripheral surface of the second tube 202 such that the adhesive 500 can axially flow from the sink groove 1011 towards the distal end when being pushed by the third tube 203.

[0038] In this embodiment, the material of the third tube 203 may be the same as or different from that of the first tube 201.

[0039] In this embodiment, the sink groove 1011 provided at the proximal end of the mounting hole 101 provides a certain radial space and an axially limiting portion for the third tube 203 sleeved on the first tube 201. During the process of the first tube 201 approaching each other axially and butting against the second tube 202, the third tube 203 can be blocked when the distal end contacts the bottom 1011a of the sink groove 1011, such that the third tube 203 can radially bend outwardly to form the drum-shaped section 203a. In this way, the drum-shaped section 203a will form a circle of hook structures with the adhesive 500, which can effectively prevent the first tube 201 from axially retreating towards the proximal end and radially displacing.

[0040] According to some alternative embodiments, as shown in Figure 5 and Figure 6 , the bottom 1011a of the sink groove 1011 is provided as an inner arc surface that gradually expands in diameter from the distal end to the proximal end.

[0041] The third tube 203 includes a straight section 2031 fixedly sleeved on the first tube 201 and a diameter-expanded 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.

[0042] Exemplarily, the straight section 2031 of the third tube 203 and the first tube 201 can be sleeved separately as shown in Figures 5 - 11 , and the sleeved part of the straight section 2031 of the third tube 203 and the first tube 201 is connected by means of fusion fixing, interference fit or adhesive fixing. The straight section 2031 of the third tube 203 and the first tube 201 can also be integrally formed as shown in Figure 12 .

[0043] The diameter-expanded section 2032 expands in diameter from the distal end of the straight section 2031 towards the distal side, so that the inner diameter of the diameter-expanded section 2032 is larger than the inner diameter of the straight section 2031. As shown in Figure 6 , when the first tube 201 and the second tube 202 are axially butted, the distal end of the diameter-expanded section 2032 abuts against the bottom 1011a of the sunk groove 1011, so that the part of the diameter-expanded section 2032 between the distal end and the proximal end bends radially outwards to form a drum-shaped section 203a.

[0044] In this embodiment, before the first tube 201 and the second tube 202 are axially butted, the adhesive 500 is injected into the sunk groove 1011 from the near port of the sunk groove 1011 by means of dispensing and pre-set in the sunk groove 1011.

[0045] Referring sequentially to Figure 7 , Figure 9 and Figure 6 , during the process of the first tube 201 axially butting the second tube 202, the distal end of the diameter-expanded section 2032 points to the bottom 1011a of the groove. When the distal end of the diameter-expanded section 2032 contacts the bottom 1011a, it forms a seal with the bottom 1011a to separate the inner and outer sides of the diameter-expanded section 2032. After that, when the distal end of the diameter-expanded section 2032 is guided by the bottom 1011a, it can move from a first radial position away from the axis to a second radial position close to the axis to gradually form a drum-shaped section 203a, and then the adhesive 500 located inside the diameter-expanded section 2032 is pushed by the third tube 203 to flow towards the distal end to gradually fill the annular space 400.

[0046] In this embodiment, when the bottom 1011a of the sinking groove 1011 is designed as an inner arc surface whose diameter gradually expands from the distal end to the proximal end, the bottom 1011a can provide a clear guidance towards the axis for the distal end of the third pipe 203, so that the distal end of the expanded diameter section 2032 of the third pipe 203 can move closer 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 when the expanded diameter section 2032 gradually invades the sinking groove 1011, the adhesive 500 located inside the expanded diameter section 2032 has a better converging effect and a pushing effect towards the distal end, enabling the adhesive 500 to move better towards the distal end of the annulus 400, ensuring the filling effect of the adhesive 500 around the second pipe 202, and finally obtaining a more stable plugging and sealing structure.

[0047] According to some alternative embodiments, as Figure 12 shown, the third pipe 203 is provided with a window 2033 on the circumferential wall of its expanded diameter section 2032, and the window 2033 is arranged adjacent to the distal end of the expanded diameter section 2032. As Figure 5 , Figure 6 and Figure 10 , Figure 11 shown, when the first pipe 201 and the second pipe 202 are axially butted, the distal end of the expanded diameter section 2032 abuts against the bottom 1011a of the sinking groove 1011 to form a drum-shaped section 203a. At this time, the window 2033 is filled with the adhesive 500, and the periphery of the window 2033 fits against the bottom 1011a for sealing, so that the adhesive 500 located inside and outside the drum-shaped section 203a will not flow through the window 2033.

[0048] In this embodiment, the window 2033 provided on the circumferential wall of the expanded diameter section 2032 can enable the adhesive 500 to be fully filled into the window 2033 during the process of the expanded diameter section 2032 invading the sinking groove 1011. After the first pipe 201 and the second pipe 202 are butted, when the expanded diameter section 2032 forms a drum-shaped section 203a, the adhesive 500 existing in the window 2033 will provide an anchor point for the drum-shaped section 203a, which can effectively prevent the first pipe 201 from retreating axially towards the proximal end and radial displacement.

[0049] According to some alternative embodiments, as Figure 9 shown, the outer circumferential surface of the third pipe 203 is provided with a circumferentially extending deformation groove 2034 at the connection of the expanded diameter section 2032 and the straight section 2031. When the expanded diameter section 2032 of the third pipe 203 forms a drum-shaped section 203a, the expanded diameter section 2032 turns radially outwards relative to the straight section 2031, so that the deformation groove 2034 becomes a contact seam as Figure 6 shown. In this embodiment, the deformation groove 2034 provided on the outer circumferential surface of the third pipe 203 at the connection of the expanded diameter section 2032 and the straight section 2031 is beneficial to the deformation of the expanded diameter section 2032.

[0050] According to some alternative embodiments, as Figure 6 shown, while the straight section 2031 of the third tube 203 is sleeved on the first tube 201, 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 butted, the distal end of the straight section 2031 of the third tube 203 is also sleeved on the second tube 202 at the same time. The adhesive 500 located in the sinking groove 1011 wraps the straight section 2031 and surrounds the butting seam between the first tube 201 and the second tube 202.

[0051] In this embodiment, the straight section 2031 sleeved on the second tube 202 is wrapped by the adhesive 500 to clamp the third tube 203 in the radial direction, so that the third tube 203 is well-positioned in the radial direction, thereby ensuring that it is more difficult for the first tube 201 to have a radial displacement relative to the second tube 202.

[0052] According to some other alternative embodiments, as Figure 10 and Figure 11 shown, while the straight section 2031 of the third tube 203 is sleeved on the first tube 201, the distal end of the straight section 2031 of the third tube 203 is located on the proximal side of the distal end of the first tube 201, so that a region with a generally triangular longitudinal section is formed between the expanded diameter section 2032 of the third tube 203 and the outer peripheral surface of the first tube 201. In the case where the first tube 201 and the second tube 202 are axially butted, the butting seam between the first tube 201 and the second tube 202 is located in the sinking groove 1011. The adhesive 500 located inside the drum-shaped section 203a surrounds the butting seam between the first tube 201 and the second tube 202, and at the same time fills the triangular region formed between the expanded diameter section 2032 and the outer peripheral surface of the first tube 201.

[0053] In this embodiment, by using the adhesive 500 to fill the triangular region between the expanded diameter section 2032 and the first tube 201 and surround the butting seam between the first tube 201 and the second tube 202, good radial positioning can be provided for the first tube 201 to ensure that it is more difficult for the first tube 201 to have a radial displacement relative to the second tube 202.

[0054] On the other hand, the present invention provides an assembly method for a front-end member, which assembles the front-end member in some of the above embodiments; the method includes the following steps: Step S1, installing the second tube 202 into the installation hole 101 provided in the receiving member 100; Step S2, referring to Figure 10 , passing the mandrel 2000 through the second tube 202, so that the proximal end of the mandrel 2000 extends beyond the proximal end of the second tube 202, and the mandrel 2000 supports the second tube 202 from the inside and maintains the position of the second tube 202 in the installation hole 101 to form a stable annular space 400.

[0055] Step S3: A certain amount of adhesive 500 is filled into the glue reservoir between the sunken groove 1011 and the outer peripheral surface of the second tube 202 in a dotting manner, such that the adhesive 500 does not exceed the proximal end of the second tube 202.

[0056] Step S4: The first tube 201 is sleeved on the mandrel 2000, and the first tube 201 is pushed to move axially from a first axial position outside the sunken groove 1011 as shown in Figure 7 to a second axial position inside the sunken groove 1011 as shown in Figure 8 so that the distal end of the expanded diameter section 2032 of the third tube 203 contacts the bottom 1011a of the groove and forms a seal with the bottom 1011a of the groove. Step S5: The first tube 201 continues to move axially from the second axial position as shown in Figure 8 to a third axial position as shown in Figure 5 so that the distal end of the expanded diameter section 2032 of the third tube 203 moves from a first radial position as shown in Figure 8 to a second radial position as shown in Figure 5 under the guiding action of the bottom 1011a of the groove to form a drum-shaped section 203a. During this period, the third tube 203 is used to push the adhesive 500 located inside the expanded diameter section 2032 to flow towards the distal end to gradually fill the annulus 400.

[0057] Step S6: After the adhesive 500 is cured, the mandrel 2000 is removed. Among them, the adhesive 500 can be a UV photosensitive adhesive. When the adhesive 500 needs to be cured, ultraviolet rays are irradiated on the adhesive 500 to enable the adhesive 500 to be quickly cured.

[0058] On the other hand, the present invention provides an insertion part 1000. As shown in Figure 1 and Figure 5 , the insertion part 1000 includes a snake bone 600, a camera illumination module 300, and a front end member in any of the above embodiments. The distal end of the first snake bone segment of the snake bone 600 is fixedly connected to the proximal end of the receiving member 100 of the front end member, and the camera illumination module 300 is installed at the installation area 102 provided on the receiving member 100.

[0059] On the other hand, the present invention provides an endoscope. As shown in Figure 1 , the endoscope includes the insertion part 1000 and a handle 3000 in the above embodiment, and the proximal end of the insertion part 1000 is connected to the handle 3000.

[0060] The endoscope involved in the embodiments of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not make specific limitations on the types of endoscopes.

[0061] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0062] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0063] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A front end component, characterized in that: include: A receiving member (100) 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 a camera lighting module (300) on the side of the mounting hole (101); An instrument tube (200) extending from the proximal end to the 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 inserted into the mounting hole (101) and forms an annulus (400) between the second tube (201) 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); The adhesive (500) is filled in the annulus (400) to bond and fix the second tube (202) and the mounting hole (101), and seal the annulus (400) to prevent liquid from leaking to the proximal end through the annulus (400).

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) wraps the first tube (201) circumferentially within the mounting hole (101) to limit the radial position of the first tube (201).

3. A front end component according to claim 1 or 2, characterized in that: 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) protruding from the distal end of the first tube (201) and abutting against the bottom (1011a) of the trough (1011) to form a seal, the third tube (203) forms a radially outwardly curved drum section (203a) in an elastically deformed state from its distal end to its proximal end, and a gap is 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).

4. A front end component according to claim 3, characterized in that: The sink groove (1011) is used to pre-place 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 with 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), and the drum-shaped section (203a) is formed on the expanded diameter section (2032); In the process of the first tube (201) being axially butted against 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) through the third tube (203) to flow toward the distal end to gradually fill the annulus (400).

5. A front end component according to claim 4, characterized in that: The peripheral wall of the diameter expansion section (2032) is provided with a window (2033); when the diameter expansion 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.

6. A front end component according to claim 4, 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 on the inner side of the drum-shaped section (203a) surrounds the joint between the first tube (201) and the second tube (202).

7. A front end component according to claim 3, 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) arranged on the distal seat (100a) and a second through hole (101b) arranged on the circuit board (100b) and docked with the proximal end of the first through hole (101a); and the sink (1011) is arranged in the second through hole (101b).

8. An insertion 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 7; 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 with the receiving component (100).

9. An endoscope, characterized in that: It comprises the insertion part as claimed in claim 8.

10. A method for assembling a front end component, characterized in that: Assembling the front end member according to any one of claims 4 to 6; 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 trough (1011) with the adhesive (500) 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 groove (1011) to a second axial position inside the groove (1011), so that the distal end of the expanded diameter section (2032) contacts the groove bottom (1011a) and forms a seal with the groove bottom (1011a); The first tube (201) is further moved axially from the second axial position to a third axial position, so that the distal end of the expanded diameter section (2032) moves from a first radial position away from the axis to a 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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