Insertion unit and endoscope

Abstract

The present application discloses an insertion part and an endoscope, and relates to the technical field of medical devices. The insertion part disclosed in the present application is used for an endoscope, and the insertion part includes a front end seat, an instrument tube, and an active bending section. The distal end of the instrument tube is fixedly mounted on the front end seat, and the instrument tube applies a traction force to the front end seat. The front end seat is pre-tightened and abuts against the distal end of the active bending section through the traction of the instrument tube; the insertion part also includes at least one elastic member, and the first abutting surface of the front end seat and / or the second abutting surface of the active bending section are provided with the elastic member, and in the circumferential direction of the insertion part, the elastic member is located on the offset side of the instrument tube. The above scheme can optimize the force distribution between the front end seat and the active bending section.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an insertion portion and an endoscope. Background Art

[0002] With the continuous development of medical technology, endoscopes have been widely used in the diagnosis and treatment of diseases. In the process of using an endoscope, the direction of the front end can be adjusted by bending the insertion part to obtain image information of the target part.

[0003] In the related art, a traction force can be applied to the front seat of the front assembly through the instrument tube to pre-tighten the front seat and the distal end of the active bending section to achieve fixed assembly of the two. However, when the insertion part of this structural layout is actually used, the front seat and the active bending section are prone to relative deflection, and even obvious mechanical damage may occur at the joint between the two. Summary of the invention

[0004] The embodiments of the present application provide an insertion portion and an endoscope, which can optimize the force distribution between the front end seat and the active bending section.

[0005] In order to solve the above problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an insertion portion for an endoscope. The insertion portion includes a front end seat, an instrument tube, and an active bending section, wherein the distal end of the instrument tube is fixedly mounted on the front end seat, the instrument tube applies a traction force to the front end seat, and the front end seat is pre-tightened and abuts against the distal end of the active bending section through the traction of the instrument tube;

[0007] The insertion portion further comprises at least one elastic member, the first abutting surface of the front end seat and / or the second abutting surface of the active bending section are provided with the elastic member, and in the circumferential direction of the insertion portion, the elastic member is located on the offset side of the instrument tube.

[0008] In a second aspect, an embodiment of the present application provides an endoscope, comprising a handle and the insertion portion described in the first aspect of the embodiment of the present application, wherein the handle is connected to the insertion portion.

[0009] The technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

[0010] In the insertion portion and endoscope disclosed in the embodiments of the present application, an elastic member is arranged between the front end seat and the active bending section and on the offset side of the instrument tube. During the pre-tightening abutment between the front end seat and the active bending section, the elastic member can consume part of the force exerted on the front end seat on the offset side of the instrument tube through elastic deformation, thereby alleviating the problem of uneven force distribution between the front end seat and the distal end of the active bending section and avoiding relative deviation between the two.

[0011] At the same time, the elastic member is squeezed between the front end seat and the active bending section to store energy. The elastic characteristics of the elastic member determine that it will apply a rebound force to the front end seat or the distal end of the active bending section by releasing energy, thereby strengthening the pre-tightening effect between the front end seat and the active bending section.

[0012] Compared with the related art, the insertion part disclosed in the embodiment of the present application can avoid relative deflection between the two, thereby improving the coaxiality of the insertion part and preventing mechanical damage due to stress concentration. At the same time, the rebound characteristics of the elastic part can enhance the pre-tightening effect between the front end seat and the active bending section, thereby improving the assembly reliability between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0014] In the attached picture:

[0015] Figure 1 It is a schematic diagram of the structure of the insertion part disclosed in some embodiments of the present application;

[0016] Figure 2 It is a structural schematic diagram of the insertion part disclosed in the first embodiment of the present application (with the front end seat hidden) and a partial enlarged diagram of the A portion thereof;

[0017] Figure 3 It is a schematic diagram of the structure of the distal snake bone disclosed in the first embodiment of the present application;

[0018] Figure 4 This is a schematic diagram of the structure of the distal snake bone disclosed in the second embodiment of the present application;

[0019] Figure 5 This is a schematic diagram of the structure of the distal snake bone disclosed in the third embodiment of the present application;

[0020] Figure 6 This is a schematic diagram of the structure of the distal snake bone disclosed in the fourth embodiment of the present application;

[0021] Figure 7 This is a schematic diagram of the structure of the distal snake bone disclosed in the fifth embodiment of the present application;

[0022] Figure 8 This is a schematic diagram of the structure of the distal snake bone disclosed in the sixth embodiment of the present application;

[0023] Fig. 9 This is a schematic diagram of the layout of the elastic member in the insertion part disclosed in the seventh embodiment of the present application;

[0024] Fig.10 This is a schematic diagram of the layout of the elastic members in the insertion part disclosed in the eighth embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100-front end assembly, 110-front end seat, 111-main body, 111a-first step portion, 112-partition plate, 120-camera, 130-light source, 140-circuit board,

[0027] 200-active bending section, 210-distal snake bone, 211-second step portion, 212-second abutment surface, 220-connecting snake bone,

[0028] 300a-first elastic member, 300b-second elastic member, 310-notch, 320-support arm,

[0029] C-deformation gap, 400-instrument tube, R-traction rope. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0031] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories 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".

[0032] The technical solutions disclosed in various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0033] In the related art, the inventors used the method of pre-tightening the instrument tube to apply traction to the front seat through the instrument tube, thereby pre-tightening the front seat against the distal end of the active bending section to improve the assembly efficiency of the insertion part. However, in actual use of endoscopes based on the above technology, it was found that the front assembly and the distal end of the active bending section were prone to relative deviation, which can be manifested at least in the poor coaxiality of the insertion part. At the same time, there was obvious mechanical damage at the joint between the front seat and the distal end of the active bending section.

[0034] After further research, the inventors found that the above problem is caused by the offset setting of the instrument tube in the front seat. Specifically, in view of the structural layout of the front assembly, the instrument tube needs to be arranged away from the central axis of the insertion part, that is, it is offset in the front seat, and the instrument tube needs to apply traction to the front seat. The traction force is an offset force relative to the front seat. When the front seat is pulled and pre-tightened and fixed at the far end of the active bending section, the force distribution of the two at the joint is not uniform, resulting in relative deflection; at the same time, because of the uneven force distribution between the two, the part with greater force is prone to mechanical damage due to stress concentration.

[0035] In this regard, some embodiments of the present application provide an insertion portion for an endoscope.

[0036] See also Figures 1 to 10 The insertion portion disclosed in the embodiment of the present application includes a front end seat 110, an instrument tube 400 and an active bending section 200. The distal end of the instrument tube 400 is fixedly mounted on the front end seat 110. The instrument tube 400 applies traction force to the front end seat 110. The front end seat 110 is pre-tightened and abuts against the distal end of the active bending section 200 through the traction of the instrument tube 400.

[0037] Specifically, the insertion part includes a front end assembly 100, and a front end seat 110 is the basic structure of the front end assembly 100, which provides a mounting base for the camera 120, the light source 130 and the circuit board 140, and of course, it can also protect these structures. Of course, the front end seat 110 is also the mounting base of the far end of the instrument tube 400.

[0038] The camera 120 can be arranged on one side of the front end face of the front end seat 110 to photograph the target part (e.g., lesion) when the insertion portion enters the human body cavity. The light source 130 is also arranged on one side of the front end face of the front end group, which can illuminate the area facing the front end assembly 100. The circuit board 140 can supply power to the camera 120 and the light source 130, and is also used to achieve signal interaction. The instrument tube 400 is used to deliver the treatment instrument into the human body cavity and to aspirate tissue fluid.

[0039] The structures of the front end assembly 100 can be processed and assembled in a variety of ways, such as Figure 2 As shown, the front seat 110 includes a main body 111 and a partition 112. The partition 112 can isolate an installation space inside the main body 111. The camera 120, the light source 130, the circuit board 140 and the distal end of the instrument tube 400 can all be arranged in the installation space. The main body 111, the partition 112, the camera 120, the light source 130, the circuit board 140 and the distal end of the instrument tube 400 are integrally formed by injecting glue into the installation space. In another embodiment, the front assembly 100 and the distal end of the instrument tube 400 can be processed and assembled by integral injection molding.

[0040] Regarding the active bending section 200, which serves as the bending action body 111 of the insertion part, it can adopt a snake-bone structure or an integrally cut structure, and the embodiments of the present application do not limit its type.

[0041] In the embodiment of the active bending section 200 having a snake-bone structure, the front seat 110 is pre-tightened and abutted against the distal side of the distal snake bone 210; the active bending section 200 also includes a plurality of connecting snake bones 220 that are rotatably connected in sequence, and the connecting snake bone 220 at the front end is rotatably connected to the distal snake bone 210 and rotates with the distal snake bone 210. Specifically, the active bending section 200 realizes bending action by pulling the traction rope R.

[0042] It can be understood that since the instrument tube 400 is fixedly connected to the front end seat 110, the instrument tube 400 can transmit the force to the front end seat 110. In the embodiment of the present application, the instrument tube 400 is suitable for bearing the traction force F (see the dotted arrow in the figure), and by transmitting the traction force F to the front end seat 110, during the assembly process of the front end assembly 100 and the active bending section 200, the front end seat 110 and the distal end of the active bending section 200 are brought close to each other, and the proximal end side of the front end seat 110 is pulled to abut against the distal end of the active bending section 200. Of course, in the process of transmitting the traction force F to the front end seat 110, the traction force F may be lost, that is, the force on the front end seat 110 is less than the traction force F or is approximately the traction force F, but for the convenience of writing, the following description is still based on the front end seat 110 receiving the traction force F.

[0043] It should be noted that the traction force F that the instrument tube 400 of the embodiment of the present application is suitable for bearing can make the front end seat 110 pre-tighten and abut against the distal end of the active bending section 200, and specifically can achieve the effect of pre-tightening and fixing the proximal side of the front end seat 110 and the distal end of the active bending section 200, so that the two can withstand a certain external force at the joint without separation, that is, the traction force F makes the proximal side of the front end seat 110 and the distal end of the active bending section 200 have a certain connection reliability. Of course, the instrument tube 400 can be pre-tightened on its proximal side, so that the instrument tube 400 can maintain a relatively tensioned state and ensure that it can always pull the front end seat 110 to pre-tighten and abut against the distal end of the active bending section 200.

[0044] Based on the above analysis, it can be known that when the front end component 100 of the embodiment of the present application is assembled with the active bending section 200, when the instrument tube 400 is inserted into the active bending section 200, the traction force F can be applied to the front end seat 110 by pulling the instrument tube 400, and the front end seat 110 can be pulled to be pre-tightened and abutted against the distal end of the active bending section 200. Of course, during the pulling process, the alignment of the front end seat 110 and the active bending section 200 can be adjusted in time.

[0045] At the same time, in an embodiment of the present application, the insertion portion also includes at least one elastic member (including the first elastic member 300a and / or the second elastic member 300b shown in the accompanying drawings), the first abutting surface of the front end seat 110 and / or the second abutting surface 212 of the active bending section 200 are provided with an elastic member, and in the circumferential direction of the insertion portion, the elastic member is located on the offset side of the instrument tube 400.

[0046] It can be understood that the insertion portion may include multiple elastic members or only one elastic member; in the abutment surface of the front end seat 110 and the abutment surface of the active bending section 200, only one of them may be provided with an elastic member, or both of them may be provided with elastic members, such as Figure 2 As shown, the elastic member is disposed on the second abutment surface 212 of the active bending section 200. The first abutment surface of the front end seat 110 refers to the abutment surface pre-tightened against the active bending section 200, and the second abutment surface 212 of the active bending section 200 refers to the abutment surface pre-tightened against the front end seat 110.

[0047] Under this structural layout, the elastic member can play an elastic supporting role between the relative abutting surfaces of the front end seat 110 and the active bending section 200 .

[0048] Specifically, in the process of the instrument tube 400 pulling the front end seat 110, the side of the front end seat 110 where the instrument tube 400 is offset will first squeeze the elastic member. As the traction force F of the instrument tube 400 continues to increase, the elastic member is compressed, and the elastic member absorbs part of the traction force F received by the front end seat 110 on the offset side of the instrument tube 400 through elastic deformation to store energy. It can be seen that the elastic member can consume part of the force received by the front end seat 110 on the offset side of the instrument tube 400, thereby alleviating the problem of uneven force distribution between the front end seat 110 and the distal end of the active bending section 200 to a certain extent, thereby avoiding relative deviation between the two.

[0049] At the same time, since the elastic member is squeezed between the front end seat 110 and the distal end of the active bending section 200 to store energy, the elastic characteristics of the elastic member determine that it will apply a rebound force to the front end seat 110 or the distal end of the active bending section 200 by releasing energy. In the case where the front end seat and the active bending section are pre-tightened and abutted, the pre-tightening effect between the front end seat 110 and the active bending section 200 includes not only the traction force applied by the instrument tube 400 to the front end seat 110, but also the rebound force of the elastic member. This can significantly improve the abutment stability between the front end seat 110 and the distal end of the active bending section 200.

[0050] Compared with the related art, the insertion portion disclosed in the embodiment of the present application sets an elastic member between the abutting surfaces of the front end seat 110 and the active bending section 200. The elastic member plays an elastic supporting role between the front end seat 110 and the active bending section 200 and is located on the offset side of the instrument tube 400, which can alleviate the problem of uneven force between the two, thereby improving the coaxiality of the insertion portion and preventing mechanical damage due to stress concentration; at the same time, the rebound characteristics of the elastic member can further strengthen the pre-tightening effect between the front end seat 110 and the active bending section 200, thereby improving the abutment stability between the two, that is, improving the assembly reliability between the two.

[0051] In the embodiments of the present application, there may be various types of elastic members. For example, the elastic member may be an independent component such as a spring.

[0052] In another embodiment, Figure 2 and Figure 3 As shown, the elastic member is integrally formed with the front end seat 110 or the active bending section 200, which can reduce the number of components of the insertion portion and the processing and assembly steps. At the same time, the elastic member integrally formed with the front end seat 110 or the active bending section 200 has better installation strength.

[0053] Furthermore, if Figure 2 and Figure 3 As shown, a deformation gap C is provided between the elastic member and the front end seat 110 or the active bending section 200. It can be understood that the deformation gap C can reduce the rigidity of the elastic member and avoid rigid contact between the elastic member and the abutting surface of the front end seat 110 or the active bending section 200, so that the elastic member is easier to achieve elastic deformation and play an elastic supporting role in the pre-tightening installation process of the front end seat 110 and the active bending section 200.

[0054] Optionally, the deformation gap C can be formed by laser cutting, which can significantly improve processing efficiency and reduce costs.

[0055] like Figure 4 , Figure 5 and Figure 7 As shown, in some embodiments of the present application, the elastic member is provided with a notch 310, and the notch 310 is connected to the deformation gap C. In such a layout, the notch 310 makes the elastic member an open structure, which can further reduce the rigidity of the elastic member, so that it is easier to achieve elastic deformation. Figure 3 As shown, the elastic member is a closed structure.

[0056] In an open elastic member, the structural characteristics of the elastic member may be different depending on the different locations of the notch 310. Figure 4 As shown, the notch 310 is disposed adjacent to the second abutment surface 212 of the active bending section 200, so that the elastic member includes a support arm 320; Figure 5 As shown, the notch 310 is disposed in the middle of the elastic member, and the notch 310 and the deformation gap C define two oppositely disposed support arms 320 on the elastic member.

[0057] In the embodiments of the present application, there are various layouts of the elastic members, such as Figure 3 to Figure 5 As shown, at least one elastic member includes a first elastic member 300a disposed on a first radial line l of the insertion portion, and the first radial line l of the insertion portion passes through the axis of the insertion portion and the axis of the instrument tube 400, so that it can play an elastic supporting role at the maximum bias force component of the traction force F applied by the instrument tube 400; Figure 6 and Figure 7 As shown, at least one elastic member includes a plurality of second elastic members 300b disposed on both sides of the first radial line l of the insertion portion, so that the plurality of second elastic members 300b on both sides of the first radial line l together play an elastic supporting role, reducing the stress loss of a single second elastic member 300b; Figure 8 As shown, a first elastic member 300a and a second elastic member 300b are provided simultaneously in the circumferential direction of the insertion portion.

[0058] It should be noted that the second elastic member 300b can share the pre-tightening and pressing effect on the first elastic member 300a, thereby preventing the first elastic member 300a from being damaged due to stress concentration.

[0059] like Figure 5 As shown, in some embodiments of the present application, the two arms 320 of the first elastic member 300a are arranged symmetrically with respect to the first radial line 1. With such an arrangement, the two arms 320 can evenly share the force while playing the role of elastic support together, and can avoid the relative deflection problem at the first elastic member 300a when the front end seat 110 and the active bending section 200 are pre-tightened and abutted.

[0060] and / or, if Fig.10 As shown, in some embodiments of the present application, in the same second elastic member 300b, the arm 320 close to the first radial line l is higher than the arm 320 away from the first radial line l; the first radial line l passes through the axis of the insertion portion and the axis of the instrument tube 400.

[0061] It should be noted that Fig.10 A schematic diagram of the layout of elastic members in an insertion portion is shown, wherein the elastic members are located in the circumference of the front end seat 110 or the active bending section 200. In order to easily reflect the differences between different elastic members, they are displayed in a two-dimensional plane.

[0062] It can be understood that, in the circumferential direction of the insertion portion and in the direction away from the first radial line l, the bias force component of the traction force of the instrument tube 400 pulling the front end seat 110 will gradually decrease, that is, in the same second elastic member 300b, the support arm 320 closer to the first radial line l is subjected to a greater pre-tightening pressure, and the support arm 320 farther away from the first radial line l is subjected to a smaller pre-tightening pressure. In this regard, there is a height difference between the two support arms 320 in the second elastic member 300b of this embodiment, and the support arm 320 closer to the first radial line l can be earlier between the front end seat 110 and the active bending The elastic support function is realized between the front end seat 110 and the active bending section 200, and the bias force component of the traction force F can be consumed by a larger elastic deformation. The support arm 320 away from the first radial line l can realize the elastic support function between the front end seat 110 and the active bending section 200 later, and the bias force component of the traction force F can be consumed by a smaller elastic deformation. This obviously helps to make the two support arms 320 of the second elastic member 300b share the force evenly during the pre-tightening abutment between the front end seat 110 and the active bending section 200, thereby avoiding the relative deflection problem at the second elastic member 300b.

[0063] As Figure 8 and Fig. 9 As shown, there are multiple elastic members, and the number or cross-sectional area of ​​the deformation gaps C in the elastic members gradually decreases in the circumferential direction of the insertion portion and in the direction away from the first radial line 1 of the insertion portion.

[0064] It should be noted that Fig. 9 A schematic diagram of the layout of elastic members in an insertion portion is shown, wherein the elastic members are located in the circumference of the front end seat 110 or the active bending section 200. In order to easily reflect the differences between different elastic members, they are displayed in a two-dimensional plane.

[0065] It can be understood that in the elastic part integrally formed with the front end seat 110 or the active bending section 200, the size of the deformation gap C is directly related to the stiffness of the elastic part. The closer the elastic part is to the first radial line l, the more deformation gaps C there are and the larger the cross-sectional area is, and the smaller the overall stiffness is. This is beneficial for consuming a larger bias force component in the traction force through a larger elastic deformation. The farther the elastic part is from the first radial line l, the fewer deformation gaps C there are and the smaller the cross-sectional area is, and the larger the overall stiffness is, which can be used to consume a smaller bias force component in the traction force. This is beneficial for improving the balance of the force distribution of different elastic parts in the circumferential direction of the insertion portion, thereby preventing relative deviation between the front end seat 110 and the active bending section 200.

[0066] like Figure 4 , Figure 5 and Figure 7As shown, in some embodiments of the present application, in the axial direction of the insertion portion, the deformation gap C is at least partially disposed below the corresponding abutment surface of the front end seat 110 or the active bending section 200. It can be understood that under this structural layout, when the front end seat 110 and the active bending section 200 are pre-tightened and abutted, the elastic member will be below the abutment surface when it is pressed into the deformation gap C, such as Figure 4 , Figure 5 and Figure 7 As shown, the support arm 320 will be pressed outside the second abutment surface 212, so as to avoid the elastic member from forming a bulge between the first abutment surface of the front end seat 110 and the second abutment surface 212 of the active bending section 200, thereby ensuring that the abutment surfaces therebetween are smoothly abutted to enhance the stability and reliability of the abutment between the two.

[0067] like Figure 2 As shown, in some embodiments of the present application, a first step portion 111a is provided at the proximal end of the front end seat 110, a second step portion 211 is provided at the distal end of the active bending section 200, and an elastic member is provided on the step surface of the first step portion 111a and / or the step surface of the second step portion 211.

[0068] It is understood that only one of the first step portion 111a and the second step portion 211 may be provided with an elastic member, such as Figure 2 As shown, the elastic member is disposed on the step surface of the second step portion 211 ; of course, the first step portion 111 a and the second step portion 211 may also be provided with elastic members.

[0069] Under such a layout, the front end seat 110 and the active bending section 200 can achieve a pre-tightened abutment and matching relationship of the front end seat 110 against the distal end of the active bending section 200 through the axial abutment of the first step portion 111a and the second step portion 211, that is, the first abutment surface of the front end seat 110 includes the step surface of the first step portion 111a, and the second abutment surface 212 of the active bending section 200 includes the step surface of the second step portion 211. At the same time, the cooperation of the first step portion 111a and the second step portion 211 ensures that the front end seat 110 and the distal end of the active bending section 200 are sleeved and matched, and the radial separation between the front end seat 110 and the active bending section 200 can be prevented. Of course, in other embodiments, the distal end of the active bending section 200 can be directly inserted into the front end seat 110 to achieve a sleeve fit.

[0070] like Figure 8 As shown, in some embodiments of the present application, there are multiple elastic members, and the height of the elastic members gradually decreases in the circumferential direction of the insertion portion and in the direction away from the first radial line l of the insertion portion; the first radial line l passes through the axis of the insertion portion and the axis of the instrument tube 400. For example, Figure 8In the illustrated embodiment, the height of the first elastic member 300a located on the first radial line 1 is h1, and the height of the second elastic members 300b on both sides thereof is h2, and h2 is smaller than h1.

[0071] It can be understood that in the circumferential direction of the insertion portion and in the direction away from the first radial line l, the bias force component of the traction force F of the instrument tube 400 pulling the front end seat 110 will gradually decrease. In this embodiment, there is a height difference between the elastic members distributed in the circumferential direction of the insertion portion. The elastic members closer to the first radial line l of the insertion portion can achieve elastic support between the front end seat 110 and the active bending section 200 earlier, and can consume the bias force component of the traction force F through a larger elastic deformation. Compared with the elastic members farther away from the first radial line l, they can achieve elastic support between the front end seat 110 and the active bending section 200 later, and can consume the bias force component of the traction force F through a smaller elastic deformation. This obviously helps to evenly share the force between different elastic members during the pre-tightening abutment between the front end seat 110 and the active bending section 200, thereby avoiding the problem of relative deflection in the circumferential direction of the insertion portion.

[0072] In this embodiment, the elastic member may be an independent component such as a spring.

[0073] And / or, in some embodiments of the present application, there are multiple elastic members, and the stiffness of the elastic members gradually increases in the circumferential direction of the insertion portion and in the direction of the first radial line l away from the insertion portion; the first radial line l passes through the axis of the insertion portion and the axis of the instrument tube 400.

[0074] It can be understood that in the circumferential direction of the insertion portion and in the direction away from the first radial line l, the bias force component of the traction force F pulled by the instrument tube 400 on the front end seat 110 will gradually decrease. In this embodiment, under such a layout, the elastic member closer to the first radial line l has a smaller stiffness, which can consume a larger bias force component of the traction force F through a larger elastic deformation, and the elastic member farther away from the first radial line l has a larger stiffness, which is used to consume a smaller bias force component in the traction force F. This is beneficial to improving the balance of the force distribution of different elastic members in the circumferential direction of the insertion portion, thereby preventing relative deviation between the front end seat 110 and the active bending section 200.

[0075] In this embodiment, the elastic member may be an independent component such as a spring.

[0076] like Figure 3 to Figure 8 As shown, in some embodiments of the present application, at least one elastic member includes a first elastic member 300a arranged on the first radial line l of the insertion part, and / or at least one elastic member includes a plurality of second elastic members 300b arranged on both sides of the first radial line l of the insertion part, and the plurality of second elastic members 300b are symmetrically distributed relative to the first radial line l; the first radial line l passes through the axis of the insertion part and the axis of the instrument tube 400.

[0077] It can be understood that in an embodiment in which multiple second elastic members 300b are symmetrically distributed relative to the first radial line l, the second elastic members 300b can evenly share the pre-tightening and pressing effect between the front end seat 110 and the active bending section 200 on both sides of the first radial line l, which is beneficial to optimize the balance of force distribution of the insertion part in the circumferential direction, thereby preventing relative deviation between the front end seat 110 and the active bending section 200.

[0078] See also Figures 1 to 10 An embodiment of the present application further provides an endoscope, which includes a handle and an insertion portion mentioned in any of the aforementioned schemes. In this way, the endoscope has the beneficial effects of the aforementioned insertion portion, which will not be repeated here.

[0079] Among them, the handle is connected to the insertion part. In a specific installation process, by pulling the instrument tube 400, a traction force F can be applied to the front end seat 110 to pull the front end seat 110 and pre-tighten it against the distal end of the active bending section 200. At the same time, the instrument tube 400 is extended and arranged in the insertion part, and its proximal end extends into the handle. In an embodiment of the present application, the proximal end of the instrument tube 400 can be pre-tightened and installed in the handle to make the instrument tube 400 in a relatively tensioned state, thereby ensuring that the front end seat 110 is always subjected to the traction force F and pre-tightened against the distal end of the active bending section 200.

[0080] Of course, it is worth mentioning that the instrument tube 400 of the endoscope is made of a flexible material, and even if a traction force F is applied to the front end seat 110 in the embodiment of the present application, it can still adapt to the bending movement of the insertion portion.

[0081] When the front end seat 110 and the active bending section 200 are pre-tightened and abutted, the elastic member will play an elastic supporting role between the front end seat 110 and the active bending section 200 and on the offset side of the instrument tube 400, effectively avoiding relative deflection between the two and improving the assembly reliability between the two.

[0082] The endoscope 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 the endoscope.

[0083] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0084] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An insertion portion for an endoscope, characterized in that: The insertion portion includes a front end seat, an instrument tube and an active bending section, the distal end of the instrument tube is fixedly mounted on the front end seat, the instrument tube can apply traction to the front end seat, and the front end seat is pre-tightened and abuts against the distal end of the active bending section through the traction of the instrument tube; The insertion portion further comprises at least one elastic member, the first abutting surface of the front end seat and / or the second abutting surface of the active bending section are provided with the elastic member, and in the circumferential direction of the insertion portion, the elastic member is located on the offset side of the instrument tube.

2. The insertion portion according to claim 1, characterized in that: The elastic member is integrally formed with the front end seat or the active bending section, and a deformation gap is provided between the elastic member and the front end seat or the active bending section.

3. The insertion portion according to claim 2, characterized in that: The elastic member is provided with a notch, and the notch is communicated with the deformation gap.

4. The insertion portion according to claim 3, characterized in that: The notch and the deformation gap define two oppositely disposed supporting arms of the elastic member; The at least one elastic member includes a first elastic member arranged on a first radial line of the insertion portion, the two arms of the first elastic member are symmetrically arranged relative to the first radial line, and / or the at least one elastic member includes a plurality of second elastic members arranged on both sides of the first radial line of the insertion portion, in the same second elastic member, the arm close to the first radial line is higher than the arm away from the first radial line; the first radial line passes through the axis of the insertion portion and the axis of the instrument tube.

5. The insertion portion according to claim 2, characterized in that: There are multiple elastic members, and the number or cross-sectional area of ​​the deformation gaps in the elastic members gradually decreases in the circumferential direction of the insertion portion and in the direction away from the first radial line of the insertion portion; the first radial line passes through the axis of the insertion portion and the axis of the instrument tube.

6. The insertion portion according to claim 2, characterized in that: In the axial direction of the insertion portion, the deformation gap is at least partially arranged below the corresponding abutment surface of the front end seat or the active bending section.

7. The insertion portion according to any one of claims 1 to 6, characterized in that: A first step portion is provided at the proximal end of the front end seat, a second step portion is provided at the distal end of the active bending section, and the elastic member is provided on the step surface of the first step portion and / or the step surface of the second step portion.

8. The insertion portion according to any one of claims 1 to 6, characterized in that: There are multiple elastic members, and their heights gradually decrease and / or their stiffness gradually increases in the circumferential direction of the insertion portion and in the direction away from the first radial line of the insertion portion; the first radial line passes through the axis of the insertion portion and the axis of the instrument tube.

9. The insertion portion according to any one of claims 1 to 6, characterized in that: The at least one elastic member includes a first elastic member arranged on a first radial line of the insertion portion, and / or the at least one elastic member includes a plurality of second elastic members arranged on both sides of a first radial line of the insertion portion, and the plurality of second elastic members are symmetrically distributed relative to the first radial line; the first radial line passes through the axis of the insertion portion and the axis of the instrument tube.

10. An endoscope, characterized in that: The invention comprises a handle and the insertion part according to any one of claims 1 to 9, wherein the handle is connected to the insertion part.

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