Endoscope

Abstract

The utility model discloses an endoscope. The endoscope comprises an endoscope body and an insertion assembly, the insertion assembly comprises a snake bone structure and a head end structure, and the snake bone structure comprises a snake bone body arranged in an annular shape and a front connecting ring arranged at the front end of the snake bone body; the head end structure is connected with the snake bone structure and comprises a head end main body and an inserting part arranged at the rear end of the head end main body, and the head end main body protrudes out of the inserting part in the radial direction of the snake bone main body; and at least part of the inserting part is inserted into the inner side of the front connecting ring and is adhered and fixed with the front connecting ring. According to the technical scheme, the insertion assembly is more convenient and reliable to assemble, the outer diameter of the head end structure can be set to be smaller, the small-size insertion assembly is more beneficial to improving the using effect, and the using effect of the endoscope can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an endoscope. Background Art

[0002] The endoscope insertion assembly includes a head end, a snake bone assembly, and a hose. Among them, for the insertion assembly, the smaller the outer diameter, the larger the working channel, and the better for clinical use. Therefore, under the premise of ensuring performance and life, how to design a smaller endoscope plug-in part is a difficulty. The small-size design is bound to increase the difficulty of the assembly process. The current conventional connection structure between the head end and the snake bone assembly is to apply glue to the outer ring of the front connecting ring of the snake bone assembly and install it into the head end. Since the overall length of the head end is relatively long, the installation length of the image sensor, optical fiber, etc. fixed on the head end is relatively long, which makes assembly inconvenient and easily causes the front connecting ring of the snake bone to be unable to be assembled into place with the head end, thus affecting the quality and use effect of the entire insertion assembly. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is that the traditional setting mode of the insertion component makes the installation length of the head end and the snake bone component too long during assembly, which makes the assembly inconvenient and affects the quality and use effect of the entire insertion component.

[0004] In order to solve the above technical problems, the utility model provides an endoscope, comprising an endoscope body and an insertion component arranged at the front end of the endoscope body, wherein the insertion component comprises:

[0005] The snake bone structure comprises a snake bone main body arranged in a ring shape and a front connecting ring arranged at the front end of the snake bone main body, and the rear end of the insertion component is connected to the endoscope main body;

[0006] The head end structure is connected to the snake bone structure, and includes a head end body and a plug-in portion provided at the rear end of the head end body. In the radial direction of the snake bone body, the head end body is provided to protrude from the plug-in portion.

[0007] Wherein, at least a part of the plug-in portion is plugged into the inner side of the front connecting ring and is bonded and fixed to the front connecting ring.

[0008] Optionally, the snake-bone structure further includes a rear connecting ring arranged at the rear end of the snake-bone body, the outer diameter of the rear connecting ring is consistent with the outer diameter of the front connecting ring, and the front connecting ring, the snake-bone body and the rear connecting ring are all coaxially arranged.

[0009] Optionally, the plug-in portion includes a plug-in ring provided at the rear end of the head end body, and a first stop portion and a second stop portion provided at the outer peripheral side of the plug-in ring;

[0010] The front connecting ring is sleeved on the outer peripheral side of the plug-in ring, and the front connecting ring has a first abutment portion and a second abutment portion, the first stop portion and the first abutment portion form a stop fit along the axial direction of the plug-in ring, and the second stop portion and the second abutment portion form a stop fit along the circumferential direction of the plug-in ring.

[0011] Optionally, the first stop portion includes a first boss protruding from the outer peripheral side of the plug-in ring, the first boss extending along the circumference of the plug-in ring and having a front side surface and a rear side surface relatively spaced apart along the axial direction of the plug-in ring, and the front end face of the front connecting ring forms the first abutting portion, and when the front end face of the front connecting ring abuts against the rear side face of the first boss, the head end structure and the snake bone structure are plugged into place.

[0012] Optionally, in the axial direction along the plug-in ring, the first boss and the head end body are spaced apart, and the space between the first boss and the head end component forms a first accommodating groove; the insertion component also includes a restraining structure, which is arranged corresponding to the first accommodating groove, and in the radial direction along the snake bone body, the restraining structure is not protruding from the plug-in ring; or, the height of the restraining structure protruding from the plug-in ring is less than 0.3 mm.

[0013] Optionally, the snake-bone structure further comprises a sleeve mounted on the outside of the snake-bone body, a front end of the sleeve is accommodated in the first receiving groove, and the restraint structure is mounted on the outside of the sleeve and accommodated in the first receiving groove.

[0014] Optionally, the restraining structure includes a strapping tape and a sealing glue wrapped around the outside of the strapping tape, the strapping tape is wrapped around the front end of the kit and is located in the first receiving groove, and the sealing glue is not protruding from the plug-in ring; or, the height of the sealing glue protruding from the plug-in ring is less than 0.3 mm.

[0015] Optionally, the second stop portion includes a second boss protruding from the outer peripheral side of the plug-in ring, the second boss is extended along the axial direction of the plug-in ring, and the second abutment portion includes a limiting groove provided on the front connecting ring, and the limiting groove is clamped on both sides of the second boss along the circumference of the plug-in ring.

[0016] Optionally, the plug-in ring is provided with a plurality of second accommodating grooves arranged at intervals along its circumference, the notches of the plurality of second accommodating grooves are all arranged outwardly and are all extended along the axial direction of the plug-in ring, and the head end body is provided with a plurality of through holes that are arranged one-to-one corresponding to the plurality of accommodating grooves.

[0017] Optionally, the insertion component also includes an instrument cavity, and a protective ring sleeved on the front end of the instrument cavity, the head end structure is provided with a connecting cavity that passes through the head end body and the plug-in part, the protective ring is plugged into the inner side of the connecting cavity, and a avoidance notch is formed on one side of the connecting cavity, and the avoidance notch is located on the plug-in part.

[0018] The technical solution provided by the utility model has the following advantages:

[0019] The endoscope provided by the utility model comprises an endoscope body and an insertion component, wherein the insertion component comprises a serpentine structure and a head end structure, wherein the serpentine structure is arranged in an annular shape, and an inner ring side thereof can be provided for optical fiber, instrument cavity, etc. to pass therethrough, and a front connecting ring is arranged at the front end of the serpentine body, and the front connecting ring is connected with the head end structure to connect the serpentine structure and the head end structure, and the head end structure comprises two parts, namely a head end body and a plug-in portion, wherein the head end body is located at the front end of the insertion component, and an image sensor, an optical fiber, an instrument cavity, etc. are all fixed on the head end body to better obtain image information in the patient's body, and the head end structure is connected to the serpentine structure via the plug-in portion, and the serpentine structure and the head end structure are connected at the front end of the serpentine body. When the overall length of the head end structure remains unchanged, the connection length between the snake-bone structure and the plug-in part is relatively shortened, the assembly length is shorter, and the assembly is more convenient. Similarly, the image sensor, optical fiber and instrument cavity are connected and fixed to the head end body, the assembly length is also relatively shorter, and the assembly is obviously easier to operate. In addition, the plug-in part is arranged to be non-protruding from the head end body. When the head end structure and the snake-bone structure are connected, since the plug-in part is plugged into the inner side of the snake-bone structure and the outer diameter is smaller than the outer diameter of the head end body, it can better ensure that the outer diameter after connection with the snake-bone structure will not be larger than the outer diameter of the head end body. Therefore, the outer diameter of the head end structure can be set smaller, and the small-sized insertion component is more conducive to improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of an insertion assembly provided by the utility model;

[0022] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the insertion assembly described in;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of detail A;

[0024] Figure 4 for Figure 1 A schematic diagram of an exploded structure of the insertion assembly;

[0025] Figure 5 for Figure 1 A partial enlarged structural diagram of the insertion assembly (without the kit) described in the figure;

[0026] Figure 6 for Figure 1 A schematic diagram of the structure of the head end structure described in;

[0027] Figure 7 for Figure 1 A schematic diagram of the decomposed structure of the snake bone body described in .

[0028] Description of reference numerals:

[0029] 100-insertion component; 1-snake bone structure; 11-snake bone body; 111-snake bone ring; 112-wire rope; 113-braided sleeve; 12-front connecting ring; 121-first abutment portion; 122-second abutment portion; 1221-limiting groove; 13-kit; 14-rear connecting ring; 2-head end structure; 21-head end body; 22-plug-in portion; 221-plug-in ring; 222-first stop portion; 2221-first boss; 223-second stop portion; 2231-second boss; 214-first accommodating groove; 215-second accommodating groove; 216-connecting cavity; 217-avoidance gap; 3-restraint structure; 31-binding belt; 32-sealing glue; 4-instrument cavity; 5-protective ring; 6-image sensor. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0033] The utility model provides an endoscope, which includes an endoscope body and an insertion component 100 arranged at the front end of the endoscope body. The endoscope is inserted into a patient's body through the insertion component 100 for detection and treatment, and the insertion component 100 is a flexible and bendable insertion component 100.

[0034] Specifically, see Figures 1 to 4 The insertion component 100 includes a serpentine structure 1 and a head end structure 2, wherein the serpentine structure 1 includes a serpentine body 11 arranged in a ring shape, and a front connecting ring 12 arranged at the front end of the serpentine body 11, and the rear end of the insertion component 100 is connected to the endoscope body; the head end structure 2 is connected to the serpentine structure 1, and the head end structure 2 includes a head end body 21, and a plug-in portion 22 arranged at the rear end of the head end body 21, and in the radial direction along the serpentine body 11, the head end body 21 is protruding from the plug-in portion 22; wherein, at least a portion of the plug-in portion 22 is plugged into the inner side of the front connecting ring 12 and is bonded and fixed to the front connecting ring 12.

[0035] In this embodiment, combined with Figure 3 and Figure 4As shown, the serpentine structure 1 is arranged in a ring shape, and the inner ring side of the serpentine structure 1 can be used for the optical fiber, the instrument cavity 4, etc. to pass through it. A front connecting ring 12 is arranged at the front end of the serpentine body 11, and the front connecting ring 12 is connected to the head end structure 2 to connect the serpentine structure 1 and the head end structure 2. The head end structure 2 includes two parts: a head end body 21 and a plug-in part 22. The head end body 21 is located at the front end of the insertion component 100. The image sensor 6, the optical fiber and the instrument cavity 4 are all fixed on the head end body 21 to better obtain the image information in the patient's body. The head end structure 2 is connected to the serpentine structure 1 through the plug-in part 22. When the overall length of the head end structure 2 remains unchanged, the serpentine The connection length between the bone structure 1 and the plug-in portion 22 is relatively shortened, the assembly length is shorter, and the assembly is more convenient. Similarly, the image sensor 6, the optical fiber and the instrument cavity 4 are connected and fixed to the head end body 21, and the assembly length is also relatively shorter, and the assembly is obviously easier to operate; and the plug-in portion 22 is arranged not to protrude from the head end body 21. When the head end structure 2 and the snake bone structure 1 are connected, since the plug-in portion 22 is plugged into the inner side of the snake bone structure 1 and the outer diameter is smaller than the outer diameter of the head end body 21, it can better ensure that the outer diameter after connection with the snake bone structure 1 will not be larger than the outer diameter of the head end body 21. Therefore, the outer diameter of the head end structure 2 can be set smaller, and the small-sized insertion component 100 is more conducive to improving the use effect.

[0036] It should be noted that when the insertion assembly 100 is in normal use, the end of the insertion assembly 100 close to the patient is the front end, and the end facing away from the patient is the rear end. The head end body 21 is located at the front end of the insertion assembly 100 to carry the image sensor 6 and other detection devices, so that the detection devices can be closer to the affected area, thereby achieving a better detection effect. If there is no special description of the description of the orientation in this utility model, it is referred to as such.

[0037] Among them, Figure 7 As shown in the figure, the snake bone body 11 is an existing structure, and the snake bone body 11 includes a plurality of snake bone circles 111 arranged in parallel, two steel wire ropes 112 connecting the plurality of snake bone circles 111, and a braided sleeve 113 sleeved on the outside of the plurality of snake bone circles 111, and the braided sleeve 113 is made of stainless steel. The entire snake bone body 11 can be bent and deformed, thereby driving the head end structure 2 to change direction and move.

[0038] Furthermore, if Figure 7As shown in the figure, the snake bone body 11 is roughly arranged in a circular ring shape, and the shape of the front connecting ring 12 is adapted to the shape of the snake bone body 11 so as to be connected and fixed to the front end of the snake bone body 11, and preferably the outer diameter of the front connecting ring 12 is consistent with the outer diameter of the snake bone body 11, so that the dimensions of the entire snake bone structure 1 are more consistent, which is convenient for assembly and also makes the formed insertion component 100 smoother during plugging.

[0039] For the head end structure 2, the head end body 21 is located at the front end of the insertion assembly 100 so as to be closest to the patient's affected area. Figure 3 and Figure 4 As shown, the insertion component 100 may also include an image sensor 6, an optical fiber and an instrument cavity 4, etc. The image sensor 6 and the instrument cavity 4 can be fixed on the head end body 21, and the detection end face of the image sensor 6 is close to or flush with the front end face of the head end body 21, so that the image sensor 6 can be closer to the affected part and can better obtain image information of the affected part; at the same time, the instrument cavity 4 can be provided for the treatment instrument to be inserted into the affected part for treatment.

[0040] In order to make the connection between the head end structure 2 and the snake bone structure 1 more reliable, the Figure 5 and Figure 6 As shown, the plug-in portion 22 includes a plug-in ring 221 arranged at the rear end of the head end body 21, and a first stop portion 222 and a second stop portion 223 arranged on the outer peripheral side of the plug-in ring 221; the front connecting ring 12 is sleeved on the outer peripheral side of the plug-in ring 221, and the front connecting ring 12 has a first abutment portion 121 and a second abutment portion 122, the first stop portion 222 and the first abutment portion 121 form a stop fit along the axial direction of the plug-in ring 221, and the second stop portion 223 and the second abutment portion 122 form a stop fit along the circumferential direction of the plug-in ring 221. The first stop portion 222 and the first abutting portion 121 form an abutment fit along the axial direction of the plug-in ring 221 to better limit the relative position of the front connecting ring 12 and the plug-in portion 22 along the axial direction of the plug-in ring 221; the second stop portion 223 and the second abutting portion 122 cooperate to limit the relative position of the plug-in ring 221 and the front connecting ring 12 along the circumferential direction, thereby ensuring the accurate relative position of the head end structure 2 and the snake bone structure 1. Then, the plug-in ring 221 and the front connecting ring 12 can be bonded at the joint of the plug-in ring 221 and the front connecting ring 12 by glue, thereby preventing the plug-in ring 221 and the front connecting ring 12 from falling off, so as to completely fix the plug-in ring 221 and the front connecting ring 12.

[0041] Preferably, if Figure 6As shown in , the first stop portion 222 includes a first boss 2221 protruding from the outer peripheral side of the plug-in ring 221, the first boss 2221 is extended along the circumference of the plug-in ring 221, and has a front side surface and a rear side surface that are relatively spaced along the axial direction of the plug-in ring 221, and the front end surface of the front connecting ring 12 forms the first abutting portion 121. When the front end surface of the front connecting ring 12 abuts against the rear side surface of the first boss 2221, the head end structure 2 and the snake bone structure 1 are plugged in place. And the diameter of the circumference of the outer side surface of the first boss 2221 is still smaller than the outer diameter of the head end body 21, so as to ensure that the overall size of the head end structure 2 will not increase.

[0042] Preferably, combined Figure 5 and Figure 6 As shown in , the second stop portion 223 includes a second boss 2231 protruding from the outer peripheral side of the plug-in ring 221, the second boss 2231 is extended along the axial direction of the plug-in ring 221, and the second abutment portion 122 includes a limiting groove 1221 provided on the front connecting ring 12, and the limiting groove 1221 is clamped on both sides of the second boss 2231 along the circumferential direction of the plug-in ring 221. Further preferably, the second boss 2231 can be extended backward from the first boss 2221 along the axial direction of the plug-in ring 221, so that the strength is better and the assembly joint of the plug-in ring 221 and the front connecting ring 12 is only limited to the plug-in portion 22, so that the assembly length is shorter and the assembly is more convenient.

[0043] There may be a plurality of second bosses 2231, which are arranged at intervals along the circumference of the plug-in ring 221. Correspondingly, there are a plurality of limiting grooves 1221, which are arranged one-to-one with the plurality of second bosses 2231, so that the limiting effect along the circumference is better.

[0044] Moreover, since the first boss 2221 and the head end body 21 are spaced apart in the axial direction of the plug ring 221, the first receiving groove 214 is formed between the first boss 2221 and the head end assembly. Specifically, the first receiving groove 214 is formed between the front end surface of the first boss 2221 and the rear end surface of the head end body 21. Figure 3 and Figure 5As shown, the insertion component 100 also includes a restraining structure 3, which can be used to assist in connecting and fixing the snake bone structure 1 and the head end structure 2. The restraining structure 3 is arranged corresponding to the first accommodating groove 214, and in the radial direction along the snake bone body 11, the restraining structure 3 is arranged not to protrude from the plug-in ring 221; or, the height of the restraining structure 3 protruding from the plug-in ring 221 is less than 0.3 mm, thereby making the overall maximum outer diameter of the insertion component 100 smaller and providing better comfort for patients during testing.

[0045] Specifically, the snake-bone structure 1 also includes a sleeve 13 sleeved on the outside of the snake-bone body 11, and the sleeve 13 can cover the snake-bone body 11 for better protection. The front end of the sleeve 13 is configured in a constricted shape to be accommodated in the first receiving groove 214, and the restraining structure 3 is sleeved on the outside of the sleeve 13 and accommodated in the first receiving groove 214, and the sleeve 13 can be fixed by the restraining structure 3. By pre-forming the first receiving groove 214 on the plug-in ring 221, the restraining structure 3 has enough accommodation space when fixing the sleeve 13, so as not to increase the overall maximum outer diameter of the insertion component 100, so that the connection and fixation of the insertion component 100 at various locations is more convenient and reliable, and the size of the insertion component 100 is smaller.

[0046] Preferably, if Figure 4 As shown in , the binding structure 3 includes a strapping belt 31 and a sealing glue 32 wrapped around the outside of the strapping belt 31. The strapping belt 31 is wound around the front end of the kit 13 and is located in the first receiving groove 214. The strapping belt 31 is a thin steel wire. After the kit 13 is installed, it is wound around the outside of the kit 13 along the first receiving groove 214, and then the outside of the steel wire is covered by the sealing glue 32, so that the overall outside gap is smaller, and the insertion component 100 is prevented from easily storing debris. Moreover, the sealing glue 32 is not protruding from the plug-in ring 221; or, the height of the sealing glue 32 protruding from the plug-in ring 221 is less than 0.3mm, so that the volume of the entire insertion component 100 is smaller, which can better meet the needs of miniaturized insertion components 100.

[0047] Moreover, in order to facilitate the installation of components such as the image sensor 6 and the optical fiber, the plug-in ring 221 is also provided with a plurality of second receiving grooves 215 arranged at intervals along the circumference thereof, the notches of the plurality of second receiving grooves 215 are all arranged outwardly and are all extended along the axial direction of the plug-in ring 221, and the head end body 21 is provided with a plurality of through holes arranged in a one-to-one correspondence with the plurality of the receiving grooves. For example, when installing the image sensor 6, the image sensor 6 can be extended from the rear end of the second receiving groove 215 to pass through the second receiving groove 215 and be inserted into one of the through holes, thereby being fixed on the head end body 21. Specifically, the image sensor 6 can be bonded to the corresponding through hole by glue. Since the notch of the second receiving groove 215 is outwardly facing, when plugging the image sensor 6, the operator can more easily observe the position and plugging status of the image sensor 6, and the bonding place between the image sensor 6 and the head end body 21 is more easily observed, so that overflow of glue can be effectively avoided, and the bonding effect is also better.

[0048] In addition, combined Figure 3 , Figure 4 and Figure 7 As shown, the insertion assembly 100 also includes an instrument cavity 4 and a protective ring 5 sleeved on the front end of the instrument cavity 4. The instrument cavity 4 is extended along the axial direction of the plug-in ring 221 so as to allow the instrument to penetrate therein and extend out of the head end body 21 to treat the affected area. Among them, a connecting cavity 216 is provided on the head end structure 2, which passes through the head end body 21 and the plug-in part 22. The protective ring 5 is plugged into the inner side of the connecting cavity 216, and a avoidance notch 217 is formed on one side of the connecting cavity 216. The avoidance notch 217 is located on the plug-in part 22. The instrument cavity 4 can be better exposed through the avoidance notch 217, which is easier to observe during assembly and more convenient to assemble.

[0049] Moreover, if Figure 4 As shown in the figure, the snake bone structure 1 also includes a rear connecting ring 14 arranged at the rear end of the snake bone body 11, the outer diameter of the rear connecting ring 14 is consistent with the outer diameter of the front connecting ring 12, and the front connecting ring 12, the snake bone body 11 and the rear connecting ring 14 are all coaxially arranged, with a compact structure, more convenient assembly, and smoother insertion into the patient's body.

[0050] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. An endoscope, comprising an endoscope body and an insertion assembly provided at the front end of the endoscope body, characterized in that: The insert assembly comprises: The snake bone structure comprises a snake bone main body arranged in a ring shape and a front connecting ring arranged at the front end of the snake bone main body, and the rear end of the insertion component is connected to the endoscope main body; The head end structure is connected to the snake bone structure, and includes a head end body and a plug-in portion provided at the rear end of the head end body. In the radial direction of the snake bone body, the head end body is provided to protrude from the plug-in portion. Wherein, at least a part of the plug-in portion is plugged into the inner side of the front connecting ring and is bonded and fixed to the front connecting ring.

2. The endoscope according to claim 1, wherein: The snake bone structure also includes a rear connecting ring arranged at the rear end of the snake bone body, the outer diameter of the rear connecting ring is consistent with the outer diameter of the front connecting ring, and the front connecting ring, the snake bone body and the rear connecting ring are all coaxially arranged.

3. The endoscope according to claim 1, wherein: The plug-in portion comprises a plug-in ring arranged at the rear end of the head end body, and a first stop portion and a second stop portion arranged at the outer peripheral side of the plug-in ring; The front connecting ring is sleeved on the outer peripheral side of the plug-in ring, and the front connecting ring has a first abutment portion and a second abutment portion, the first stop portion and the first abutment portion form a stop fit along the axial direction of the plug-in ring, and the second stop portion and the second abutment portion form a stop fit along the circumferential direction of the plug-in ring.

4. The endoscope according to claim 3, wherein: The first stop portion includes a first boss protruding from the outer peripheral side of the plug-in ring, the first boss extending along the circumference of the plug-in ring and having a front side surface and a rear side surface relatively spaced apart along the axial direction of the plug-in ring, and the front end surface of the front connecting ring forms the first abutting portion, and when the front end surface of the front connecting ring abuts against the rear side surface of the first boss, the head end structure and the snake bone structure are plugged into place.

5. The endoscope according to claim 4, characterized in that In the axial direction of the plug-in ring, the first boss and the head end body are spaced apart, and the space between the first boss and the head end component forms a first accommodating groove; the insertion component also includes a restraining structure, which is arranged corresponding to the first accommodating groove, and in the radial direction along the snake bone body, the restraining structure is not protruding from the plug-in ring; or, the height of the restraining structure protruding from the plug-in ring is less than 0.3 mm.

6. The endoscope according to claim 5, characterized in that The snake-bone structure also includes a sleeve mounted on the outside of the snake-bone body, a front end of the sleeve is accommodated in the first receiving groove, and the restraint structure is mounted on the outside of the sleeve and accommodated in the first receiving groove.

7. The endoscope according to claim 6, characterized in that The restraining structure includes a strapping belt and a sealing glue wrapped around the outside of the strapping belt. The strapping belt is wrapped around the front end of the kit and is located in the first receiving groove. The sealing glue is not protruding from the plug-in ring; or, the height of the sealing glue protruding from the plug-in ring is less than 0.3 mm.

8. The endoscope according to claim 3, wherein: The second stop portion includes a second boss protruding on the outer peripheral side of the plug-in ring, the second boss is extended along the axial direction of the plug-in ring, and the second abutment portion includes a limiting groove provided on the front connecting ring, and the limiting groove is clamped on both sides of the second boss along the circumference of the plug-in ring.

9. The endoscope according to claim 3, characterized in that: The plug-in ring is provided with a plurality of second accommodating grooves arranged at intervals along its circumference, the notches of the plurality of second accommodating grooves are all arranged outwardly and are all extended along the axial direction of the plug-in ring, and the head end body is provided with a plurality of through holes which are arranged in a one-to-one correspondence with the plurality of accommodating grooves.

10. The endoscope according to claim 1, wherein: The insertion component also includes an instrument cavity and a protective ring sleeved on the front end of the instrument cavity. The head end structure is provided with a connecting cavity that passes through the head end body and the plug-in part. The protective ring is plugged into the inner side of the connecting cavity, and a avoidance notch is formed on one side of the connecting cavity. The avoidance notch is located on the plug-in part.

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