Active bending pipe and insertion part of endoscope and endoscope

Abstract

The utility model provides an active bending tube and an insertion part of an endoscope and the endoscope, and relates to the technical field of endoscopes, the active bending tube is provided with a traction rope installation combination and a deformation gap, the traction rope installation combination comprises a plurality of traction rope installation parts which are distributed along the axial direction of the active bending tube, and the deformation gap is formed between the traction rope installation parts. The traction rope is used for installing an endoscope in a penetrating mode in the axial direction of the driving bending pipe; the deformation gap is formed in the near end of the active bending pipe and used for providing deformation allowance in the installation process of the active bending pipe and the passive bending section of the insertion part. And in the circumferential direction of the active bending pipe, the deformation gap and the traction rope mounting combination are distributed in a staggered manner. Compared with the prior art, the active bending pipe has the advantage that the damage resistance of the active bending pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an active bending tube of an endoscope, an insertion part and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device, which usually includes an insertion part, an operating handle and a display device connected in sequence. The insertion part can be inserted into the human body, and the internal tissues of the human body can be observed through the lighting module and the camera module at its distal end, so as to help doctors determine the location of the lesion in the patient's body and the tissue structure characteristics of the lesion location. In the prior art, the insertion part includes a passive bending section and an active bending tube connected to the distal end of the passive bending section. The active bending tube is driven to bend by controlling the lever on the operating handle. The active bending tube is usually bent by a snake-bone structure, and an instrument tube and a wiring harness connecting the lighting module and the camera module are arranged in the snake-bone structure.

[0003] In the related art, a deformation gap is often constructed at the proximal end of the active bending tube and the passive bending section to reduce the difficulty of deformation and improve assembly efficiency. However, in actual use, the active bending tube with the deformation gap is prone to damage. Utility Model Content

[0004] The utility model aims to design an active bending tube, an insertion part and an endoscope of an endoscope, which have the advantage of improving the anti-damage performance of the active bending tube.

[0005] The utility model is realized by the following technical solutions:

[0006] An active bending tube is applied to the insertion part of an endoscope, wherein the active bending tube has a traction rope installation combination and a deformation gap, wherein:

[0007] The traction rope installation assembly comprises a plurality of traction rope installation parts distributed along the axial direction of the active bending tube, and is used to pass the traction rope for installing the endoscope along the axial direction of the active bending tube;

[0008] The deformation gap is provided at the proximal end of the active bending tube, and is used to provide a deformation margin during the installation process of the active bending tube and the passive bending section of the insertion part;

[0009] In the circumferential direction of the active bending tube, the deformation gap and the traction rope installation assembly are staggered and distributed.

[0010] In a second aspect, the present application provides an insertion portion, comprising the active bending tube described in the first aspect of the present application.

[0011] In a third aspect, the present application provides an endoscope, comprising the insertion portion described in the second aspect of the present application.

[0012] The utility model has the following advantages and beneficial effects:

[0013] After a deformation gap is opened on the active bending tube, a stress-bearing area will be generated around the deformation gap on the active bending tube, and after the traction rope mounting portion and the deformation gap are staggered, when the endoscope is used and the traction rope is pulled, the traction rope mounting portion will be subjected to external force. At this time, the stress distribution path of the traction rope mounting portion formed along the axial direction of the active bending tube will avoid the stress-bearing area formed around the deformation gap, so that the deformation gap and the stress distribution path are staggered.

[0014] On this basis, during the use of the endoscope, after the active bending tube is bent by the traction of the traction rope, the active bending tube is not easily damaged, thereby improving the damage resistance of the active bending tube during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the insertion part in the embodiment of the present application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the insertion part in the embodiment of the present application. Figure 2 ;

[0018] Figure 3 It is a front schematic diagram for demonstrating the positional relationship between the deformation gap and the traction rope mounting portion in the embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of the active bending tube used in the embodiment of the present application;

[0020] Figure 5 yes Figure 4 A magnified view of part A in FIG.

[0021] Figure 6 It is a partial exploded view used to illustrate the connection relationship between the proximal end of the active bending tube and the distal end of the passive bending section in the embodiment of the present application.

[0022] The markings in the figure are:

[0023] 100, active bending tube; 110, traction rope installation assembly; 111, traction rope installation part; 120, deformation gap; 121, straight gap section; 122, arc transition end; 130, first bending section; 131, snake bone joint; 140, second bending section; 141, bending gap; 142, first bending gap; 143, second bending gap; 150, connecting section; 151, sleeve part; 152, bending part; 160, clamping part; 200, passive bending section; 300, hinged structure. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] The technical solutions disclosed in various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0027] In the related art, a plurality of deformation slits 120 extending along the length direction of the active bending tube 100 are generally provided in the circumferential direction of the proximal end of the active bending tube 100, so that the proximal end of the active bending tube 100 can be more easily deformed by the deformation slits 120 to adapt to the docking structure at the distal end of the passive bending section 200, thereby achieving quick assembly. However, the active bending tube 100 with the above-mentioned deformation slits 120 is often found to be easily damaged during the use of the endoscope.

[0028] After research, the inventors found that the above problems are mainly caused by the arrangement of the deformation gap 120 on the force distribution path of the active bending tube 100. Specifically, there are some force-bearing areas on the active bending tube 100. For example, when the active bending tube 100 needs to be actively bent during the use of the endoscope, the traction rope is first pulled, and the traction rope is installed in the active bending tube 100 through the traction rope installation part 111, and the extension direction of the traction rope is limited. Therefore, when the traction rope is pulled, it will cause the active bending tube 100 to deform, so that the active bending tube 100 is subjected to force and forms a force distribution path along the axial direction of the active bending tube 100. The deformation gap 120 is usually arranged on this force distribution path, so it is easy to cause structural damage to the active bending tube 100.

[0029] It should be noted that in the embodiments of the present application, "proximal end" and "distal end" refer to the distance between the endoscope and its accessories and 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".

[0030] In order to solve the above problems, an embodiment of the present application provides an active bending tube 100 which is applied to the insertion part of an endoscope.

[0031] Please attend Figure 1 to Figure 6 The active bending tube 100 disclosed in the embodiment of the present application includes a traction rope installation assembly 110 and a deformation gap 120, wherein:

[0032] The traction rope installation assembly 110 includes a plurality of traction rope installation parts 111 distributed along the axial direction of the active bending tube 100. The traction rope in the endoscope can be inserted into the plurality of traction rope installation parts 111 along the axial direction of the active bending tube 100, and the active bending tube 100 can be bent and deformed when the traction rope is pulled.

[0033] The deformation slit 120 is provided at the proximal end of the active bending tube 100. The extension direction of the deformation slit 120 is the same as the extension direction of the active bending tube 100 when it is in a straight line. The deformation slit 120 is used to provide a deformation margin when the proximal end of the active bending tube 100 is connected to the passive bending section 200 of the insertion part. Exemplarily, the deformation slit 120 has a variety of structural forms, such as the open slit shown in the drawings of the present application, or the closed strip slit. In fact, the closed strip slit can also achieve the effect of compensating for the anti-damage characteristics, because the rigidity and strength of the closed strip slit are greater after the opening, but the deformation characteristics of the closed strip slit are lower than those of the open slit. In order to adapt to the bending of the active bending tube 100 in the present application, it is preferred to set the deformation slit 120 as an open slit. That is, after the deformation slit 120 is provided at the proximal end of the active bending tube 100, it can undergo elastic deformation itself so as to adapt to the docking with the passive bending section 200.

[0034] In this embodiment, the traction rope installation part 111 is an installation groove recessed into the active bending tube 100, that is, two adjacent parallel slits are cut into the tube wall of the active bending tube 100, and then the tube wall between the two adjacent parallel slits is pushed into the active bending tube 100 by external force, thereby forming an installation groove for the traction rope to pass through. In some other embodiments, the traction rope installation part 111 can be installed on the outer wall of the active bending tube 100, and a plurality of traction rope installation parts 111 are evenly distributed along the axial direction of the active bending tube 100. At the same time, in order to facilitate the insertion of the traction rope, the traction rope installation part 111 can be set as a circular ring.

[0035] In the circumferential direction of the active bending tube 100, the deformation gap 120 and the traction rope installation combination 110 are staggered, that is, the deformation gap 120 and the multiple traction rope installation parts 111 are staggered. After such arrangement, when using the endoscope, the traction rope is pulled, so that the traction rope installation part 111 is subjected to force and drives the active bending tube 100 to deform. At this time, the position of the traction rope installation part 111 will be subjected to force, and since the deformation gap 120 is staggered with the traction rope installation part 111, the force area around the deformation gap 120 will be staggered with the force area around the traction rope installation part 111, that is, the position of the deformation gap 120 is not on the force distribution path of the traction rope installation part 111, thereby improving the damage resistance of the active bending tube 100 after the deformation gap 120 is opened.

[0036] like Figure 2 , 3As shown, the active bending tube 100 has a first bending section 130, and the first bending section 130 includes a plurality of serpentine joints 131 connected along its axial direction, each serpentine joint 131 is tubular, and two adjacent serpentine joints 131 are rotationally matched through a hinge structure 300. In the embodiment of the present application, the hinge structure 300 is riveted, that is, lugs are provided on two opposite wall surfaces of the serpentine joints 131, and the lugs between the two adjacent serpentine joints 131 are rotationally connected by riveting. In some other embodiments, a hanging shaft is provided on one serpentine joint 131, and a groove for rotationally matching with the hanging shaft is provided on another adjacent serpentine joint 131, and the mutual rotation between the two adjacent serpentine joints 131 can be achieved by buckling the hanging shaft into the groove.

[0037] Specifically, in the circumferential direction of the active bending tube 100, the deformation gap 120 and the hinge structure 300 are also staggered. After the hinge structure 300 is provided on the active bending tube 100, a stress area is also generated near the hinge structure 300. After the deformation gap 120 and the hinge structure 300 are staggered, when the endoscope is used, the traction rope is pulled to cause the first bending section 130 to bend and deform, and the hinge structure 300 located on the first bending section 130 is the stress area. At this time, the stress area around the deformation gap 120 is staggered with the stress area around the hinge structure 300, so that the deformation gap 120 is not on the stress distribution path on the hinge structure 300, further improving the damage resistance of the active bending tube 100 after the deformation gap 120 is opened.

[0038] In this embodiment, the active bending tube 100 further has a second bending section 140, and the second bending section 140 includes a plurality of bending slits 141 distributed along its axial direction. The bending slits 141 are used to achieve bending action when the second bending section 140 is subjected to an axial external force, that is, when the second bending section 140 is bent, the existence of the bending slits 141 provides bending space for the bending action of the second bending section 140. Specifically, the plurality of bending slits 141 include a first bending slit 142 and a second bending slit 143 that are relatively distributed along the radial direction of the second bending section 140, and the first bending slit 142 and the second bending slit 143 are alternately distributed along the axial direction of the second bending section 140. With such an arrangement, the second bending section 140 can achieve multi-angle bending in its own circumferential direction, thereby improving the bending applicability of the active bending tube 100.

[0039] It is worth noting that in this embodiment, from the distal end to the proximal end of the active bending tube 100, the first bending section 130 and the second bending section 140 are connected in sequence, and the deformation gap 120 is provided at the proximal end of the second bending section 140; since the first bending section 130 is close to the distal end in the use environment, the first bending section 130 needs to meet a stronger bending performance, and the first bending section 130 adopts a hinged structure 300, which can make its own bending performance better. In addition, since the second bending section 140 is close to the proximal end in the use environment, it does not need too strong bending performance itself, but is closer to the deformation gap 120 than the first bending section 130, so it needs to have better structural strength; therefore, the second bending section 140 adopts a cutting structure, that is, a bending gap 141 is provided in itself, so as to meet the structural strength while balancing the strength requirements of the active bending tube 100 after the deformation gap 120 is provided at the proximal end.

[0040] On this basis, in this embodiment, combined with the attached Figure 4 In the circumferential direction of the active bending tube 100, the ends of the first bending slit 142 and the ends of the second bending slit 143 are both staggered with the deformation slit 120. In some other embodiments, it can be set that only the end of the first bending slit 142 and the deformation slit 120 are staggered in the circumferential direction of the active bending tube 100, or it can be set that only the end of the second bending slit 143 and the deformation slit 120 are staggered in the circumferential direction of the active bending tube 100. That is, after the first bending slit 142 and / or the second bending slit 143 are staggered with the hinge structure 300, the stress area around the deformation slit 120 will be staggered with the stress area around the first bending slit 142 and / or the second bending slit 143, so that the deformation slit 120 is not on the stress distribution path of the first bending slit 142 and / or the second bending slit 143, and the damage resistance of the active bending tube 100 after the deformation slit 120 is opened is further improved.

[0041] like Figure 4 , 5 As shown, the active bending tube 100 includes a connecting section 150 disposed at its proximal end, and the connecting section 150 is used to connect with the distal end of the passive bending section 200. Specifically, the connecting section 150 includes a sleeve portion 151 and a curved portion 152 disposed at the distal end of the sleeve portion 151. In this embodiment, the connecting section 150 defines a sleeve space in the sleeve portion 151 through the curved portion 152, that is, a sleeve space for the distal end of the passive bending section 200 to be inserted is formed inside the curved portion 152 and the sleeve portion 151, and the sleeve portion 151 is sleeved on the distal end of the passive bending section 200, and the distal end of the passive bending section 200 is located inside the sleeve portion 151.

[0042] In some other embodiments, the connecting section 150 defines a socket position outside the socket portion 151 through the curved portion 152, that is, a socket position for the distal end of the passive bending section 200 to be inserted is formed on the curved portion 152 and the socket portion 151, and the socket portion 151 is located inside the distal end of the passive bending section 200. That is, the diameter of the connecting section 150 can be adaptively adjusted according to the distal end diameter of the passive bending section 200, so as to realize different connection modes and improve the connection adaptability between the active bending tube 100 and the passive bending section 200.

[0043] Reference Figure 5 , the deformation gap 120 extends from the sleeve part 151 to the curved part 152, that is, a part of the seam of the deformation gap 120 is on the curved part 152; the purpose of such a setting is that after the deformation gap 120 is opened, most of the stress-bearing area around the deformation gap 120 is concentrated on the sleeve part 151, which will make the structural stability of the sleeve part 151 itself poor; and the seam of the deformation gap 120 close to the end is a region with greater stress, so extending the far end of the deformation gap 120 to the curved part 152 can make the stress after the deformation gap 120 is opened distributed on the curved part 152, so that the external force on the sleeve part 151 itself is reduced, and the stress-bearing area on the sleeve part 151 is relatively reduced, thereby improving the overall structural stability of the connecting section 150.

[0044] On this basis, the deformation gap 120 includes a straight gap section 121 and an arc-shaped transition end 122, and the arc-shaped transition end 122 is connected to the end of the straight gap section 121, that is, the arc-shaped transition end 122 is the distal end of the deformation gap 120; wherein the straight gap section 121 is opened on the sleeve portion 151 along the axial direction of the sleeve portion 151, and the arc-shaped transition end 122 is opened at the proximal end of the curved portion 152. 122 is the area with the greatest stress in the entire deformation gap 120. Therefore, opening the arc-shaped transition end 122 on the bending portion 152 can reduce the stress area of ​​the sleeve portion 151 after the deformation gap 120 is opened, compared with opening the arc-shaped transition end 122 on the sleeve portion 151. This allows the bending portion 152, which has a relatively complete and stable structure, to bear part of the stress generated after the deformation gap 120 is opened, thereby further improving the overall structural stability of the connecting section 150 after the deformation gap 120 is opened.

[0045] Combination Figure 5 , 6The proximal end of the active bending tube 100 has a clamping portion 160, which is used to clamp and cooperate with the distal end of the passive bending section 200; in the present embodiment, if the bending portion 152 and the sleeve portion 151 form a sleeve space into which the distal end of the passive bending section 200 can be inserted, the clamping portion 160 is configured as a first blocking piece arranged circumferentially along the sleeve portion 151 and recessed into the sleeve portion 151, and correspondingly, a clamping groove that is clamped with the first blocking piece is opened on the circumference of the distal end of the passive bending section 200; in some other embodiments, if the bending portion 152 and the sleeve portion 151 form a sleeve position into which the distal end of the passive bending section 200 can be inserted, the clamping portion 160 is configured as a second blocking piece arranged circumferentially along the sleeve portion 151 and protruding out of the sleeve portion 151, and similarly, a clamping groove that is clamped with the second blocking piece is opened on the circumference of the distal end of the passive bending section 200. By the engagement between the engaging portion 160 and the engaging groove, the connecting section 150 of the active bending tube 100 and the distal end of the passive bending section 200 are not easily separated in the axial direction, so that the connecting section 150 on the active bending tube 100 and the distal end of the passive bending section 200 can be more tightly connected.

[0046] On this basis, in the circumferential direction of the proximal end of the active bending tube 100, the clamping portion 160 is not only staggered with the deformation gap 120, but also evenly distributed with the deformation gap 120; after such arrangement, the stress-bearing area around the deformation gap 120 will be staggered with the stress-bearing area around the clamping portion 160, further improving the anti-damage performance of the active bending tube 100 after the deformation gap 120 is opened.

[0047] The embodiment of the present application further provides an insertion portion, which includes the active bending tube 100 mentioned in any of the above solutions. The insertion portion of this embodiment has the beneficial effects of the above active bending tube 100, which will not be repeated here.

[0048] The embodiment of the present application further provides an endoscope, which includes the aforementioned insertion portion of the endoscope. The endoscope of this embodiment has the beneficial effects of the aforementioned insertion portion and the active bending tube 100, which will not be described in detail here.

[0049] The endoscope in the embodiment of the present application may be a gastroscope, a colonoscope, a laryngoscope, a fiber bronchoscope, etc. The embodiment of the present application does not specifically limit the type of the endoscope.

[0050] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. An active bending tube of an endoscope, applied to the insertion portion of an endoscope, characterized in that: The active bending tube (100) comprises a traction rope installation assembly (110) and a deformation gap (120), wherein: The traction rope installation assembly (110) comprises a plurality of traction rope installation parts (111) distributed along the axial direction of the active bending tube (100), and is used for passing a traction rope for installing an endoscope along the axial direction of the active bending tube (100); The deformation gap (120) is opened at the proximal end of the active bending tube (100) and is used to provide a deformation margin during the installation process of the active bending tube (100) and the passive bending section (200) of the insertion part; In the circumferential direction of the active bending tube (100), the deformation gap (120) and the traction rope installation assembly (110) are staggeredly distributed; The active bending tube (100) comprises a connecting section (150) arranged at its proximal end, the connecting section (150) comprising a sleeve portion (151) and a curved portion (152) arranged at the distal end of the sleeve portion (151), the connecting section (150) defining a sleeve space inside the sleeve portion (151) through the curved portion (152), or defining a sleeve position outside the sleeve portion (151), so as to be sleeved and matched with the distal end of the passive bending section (200); The deformation gap (120) extends from the sleeve portion (151) to the bending portion (152); The deformation gap (120) comprises a straight gap section (121) and an arc-shaped transition end (122), wherein the arc-shaped transition end (122) is connected to the end of the straight gap section (121); wherein the straight gap section (121) is opened at the sleeve portion (151), and the arc-shaped transition end (122) is opened at the proximal end of the curved portion (152).

2. The active bending tube of an endoscope according to claim 1, characterized in that: The active bending tube (100) comprises a first bending section (130), the first bending section (130) comprises a plurality of snake bone nodes (131) distributed along its axial direction, adjacent snake bone nodes (131) are rotationally matched via a hinge structure (300), and in the circumferential direction of the active bending tube (100), the deformation gap (120) and the hinge structure (300) are staggeredly distributed; And / or, the active bending tube (100) further comprises a second bending section (140), the second bending section (140) comprises a plurality of bending slits (141) distributed along its axial direction, the bending slits (141) being used to realize bending action when the second bending section (140) is subjected to an axial external force; the plurality of bending slits (141) comprises a first bending slit (142) and a second bending slit (143) which are relatively distributed along the radial direction of the second bending section (140), the first bending slit (142) and the second bending slit (143) being alternately distributed along the axial direction of the second bending section (140); in the circumferential direction of the active bending tube (100), at least one of the end of the first bending slit (142) and the end of the second bending slit (143) is staggered with the deformation slit (120).

3. The active bending tube of an endoscope according to claim 2, characterized in that: In the direction from the distal end to the proximal end of the active bending tube (100), the first bending section (130) and the second bending section (140) are connected in sequence, and the deformation gap (120) is arranged at the proximal end of the second bending section (140).

4. An active bending tube for an endoscope according to any one of claims 1 to 3, characterized in that: The proximal end of the active bending tube (100) has a clamping portion (160), and the clamping portion (160) is used to be clamped and matched with the passive bending section (200); in the circumferential direction of the active bending tube (100), the clamping portion (160) and the deformation gap (120) are staggered.

5. The active bending tube of an endoscope according to claim 4, characterized in that: The deformation gap (120) and the clamping portion (160) are evenly distributed in the proximal circumferential direction of the active bending tube (100).

6. An insertion portion, characterized in that: An active bending tube (100) comprising any one of claims 1 to 5.

7. An endoscope, characterized in that: It comprises the insertion part as claimed in claim 6.

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