Endoscope and insertion assembly thereof

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an endoscope and an insertion assembly thereof. The insertion assembly comprises an insertion part and a traction rope, the traction rope penetrates through the insertion part, the insertion part comprises an insertion section and an active bending section, the active bending section is arranged at the far end of the insertion section, the traction rope comprises a rigid section and a flexible section, the rigidity of the rigid section is larger than that of the flexible section, and the far end of the rigid section is located in the insertion section. The far end of the rigid section is connected with the far end of the active bending section through the flexible section, the near end of the rigid section can be connected with a driving assembly of the endoscope, and the driving assembly can drive the rigid section to move in the axial direction of the insertion section so as to transmit pushing force or pulling force applied by the driving assembly to the rigid section. After the structure of the embodiment is adopted, the friction force needing to be overcome in the process that the active bending section recovers to the straight state from the bending state can be reduced, and therefore the risk that the active bending section cannot completely recover to the straight state can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to an endoscope and an insertion assembly thereof. Background Art

[0002] When diagnosing and treating lesions in the patient's body, an endoscope is usually required. The endoscope includes an operating handle and an insertion part. During specific operation, by controlling the operating handle, the active bending section at the distal end of the insertion part can be pulled by a traction rope to achieve bending action, thereby changing the direction of the distal end of the insertion part to facilitate the insertion part to enter the natural cavity of the human body.

[0003] At present, the active bending section of the insertion part of some endoscopes can only achieve unilateral bending. The active bending section is bent by pulling the traction rope backwards through the operating handle; after releasing the traction rope, the active bending section will recover from the bent state to the straight state by its own elasticity. During this process, the active bending section will pull the traction rope forward. However, when using the current endoscope, the inventor found that after releasing the traction rope, the active bending section cannot completely recover to the straight state. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an endoscope and an insertion assembly thereof, which can reduce the risk that the active bending section cannot be completely restored to a straight state after the traction rope is released.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides an insertion assembly of an endoscope, comprising an insertion portion and a traction rope, wherein the traction rope is inserted into the insertion portion, the insertion portion comprises an insertion section and an active bending section, and the active bending section is arranged at the distal end of the insertion section.

[0007] The traction rope includes a rigid section and a flexible section. The rigidity of the rigid section is greater than that of the flexible section. The distal end of the rigid section is located in the insertion section, and the distal end of the rigid section is connected to the distal end of the active bending section through the flexible section. The proximal end of the rigid section can be connected to the driving assembly of the endoscope, and the driving assembly can drive the rigid section to move axially along the insertion section to transmit the thrust or pull applied by the driving assembly to the rigid section.

[0008] In a second aspect, an embodiment of the present application provides an endoscope comprising the above-mentioned insertion assembly.

[0009] In the embodiment of the present application, the traction rope includes a rigid section and a flexible section, the rigidity of the rigid section is greater than that of the flexible section, and the distal end of the rigid section is located within the insertion section, that is, at least part of the rigid section is located within the insertion section. Since the rigid section has greater rigidity and can transmit the pulling force or thrust applied by the driving assembly of the endoscope, when the insertion assembly of the embodiment of the present application is specifically used, if the active bending section is to be restored to a straight state from a bent state, the rigid section of the traction rope can no longer be pulled, but the rigid section can be pushed. Since the rigid section has greater rigidity and can transmit thrust, the rigid section will not bend under the action of the thrust. In this way, the rigid section will move toward the distal end of the insertion part under the action of the thrust. At this time, the friction force generated by the rigid section during movement is overcome by the thrust, rather than by the active bending section relying on its own elasticity. The elasticity of the active bending section itself only needs to overcome the friction force generated by the part of the traction rope located on the distal side of the rigid section during movement. It can be seen that after adopting the structure of this embodiment, the friction that the active bending section needs to overcome in the process of recovering from a bent state to a straight state can be reduced, thereby reducing the risk that the active bending section cannot be completely restored to a straight state. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the endoscope disclosed in the embodiment of the present application;

[0011] Figure 2 It is a structural schematic diagram of the insertion assembly disclosed in the embodiment of the present application;

[0012] Figure 3 A cross-sectional view of an insertion assembly disclosed in an embodiment of the present application;

[0013] Figure 4 This is a schematic diagram of the structure of the traction rope disclosed in the embodiment of the present application.

[0014] Description of reference numerals:

[0015] 100, insertion part; 110, insertion section; 111, through hole; 120, active bending section; 200, traction rope; 210, rigid section; 220, flexible section; 300, harness structure; 310, harness hole; 400, operating handle. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are 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 creative work are within the scope of protection of this application.

[0017] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0018] The endoscope and its insertion assembly provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0019] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components 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".

[0020] The inventor has discovered that the traction rope of the current endoscope is passed through the insertion portion, and the traction rope may come into contact with the inner wall of the insertion portion or other components in the insertion portion when being pulled forward or backward, which will cause friction between the traction rope and the components in contact with it. In other words, the active bending section needs to overcome the above-mentioned friction force when it pulls the traction rope forward by relying on its own elasticity. When the force applied by the active bending section to the traction rope is less than the friction force, the active bending section will not be able to drive the traction rope to continue to move forward, which will cause the active bending section to be unable to return to a straight state.

[0021] In addition, since the rigidity of the traction rope of the current endoscope is relatively small, when the traction rope is pushed, the traction rope is easily bent and deformed and becomes redundant in the insertion part. Therefore, the current endoscope can only move forward by releasing the traction rope and using the elasticity of the active bending section. The forward movement here refers to: moving in the direction close to the distal end of the insertion part; the backward movement refers to: moving in the direction close to the proximal end of the insertion part.

[0022] like Figures 2 to 4As shown, the embodiment of the present application discloses an insertion assembly of an endoscope, including an insertion portion 100 and a traction rope 200, wherein the traction rope 200 is inserted into the insertion portion 100, and the insertion portion 100 includes an insertion section 110 and an active bending section 120, wherein the active bending section 120 is arranged at the distal end of the insertion section 110. Optionally, the active bending section 120 may be an integrally cut structure, and the integrally cut structure may enable the active bending section 120 to have good elasticity, so that the active bending section 120 can stably pull the traction rope 200 forward during the process of restoring from a bent state to a straight state, and / or the active bending section 120 may also be an elastic tube section, which also has good elasticity, for example, the active bending section 120 may include a plurality of condyles hinged in series, and an elastic member may be arranged between two adjacent condyles at this time, and when the active bending section 120 is bent, the elastic member undergoes elastic deformation.

[0023] The traction rope 200 includes a rigid section 210 and a flexible section 220. The rigidity of the rigid section 210 is greater than that of the flexible section 220. The distal end of the rigid section 210 is located in the insertion section 110, and the distal end of the rigid section 210 is connected to the distal end of the active bending section 120 through the flexible section 220. The proximal end of the rigid section 210 can be connected to the drive assembly of the endoscope, and the drive assembly can drive the rigid section 210 to move along the axial direction of the insertion section 110 to transmit the thrust or tension applied by the drive assembly to the rigid section 210. Specifically, when the drive assembly drives the rigid section 210 to move in a direction away from the distal end of the insertion portion 100, the drive assembly applies a tension to the rigid section 210, thereby driving the active bending section 120 to bend; when the drive assembly drives the rigid section 210 to move in a direction close to the distal end of the insertion portion 100, the drive assembly applies a thrust to the rigid section 210, and the active bending section 120 gradually returns to a straight state.

[0024] In the embodiment of the present application, the traction rope 200 includes a rigid section 210 and a flexible section 220. The rigidity of the rigid section 210 is greater than that of the flexible section 220. The distal end of the rigid section 210 is located within the insertion section 110. That is, at least part of the rigid section 210 is located within the insertion section 110. Since the rigid section 210 has a large rigidity and the rigid section 210 can transmit the pulling force or thrust applied by the driving component of the endoscope, when the insertion component of the embodiment of the present application is specifically used, if the active bending section 120 is to be restored to a straight state from a bent state, the traction rope can be no longer pulled. The rigid section 210 of the traction rope 200 is not moved, but pushed. Since the rigid section 210 has a large rigidity and can transmit thrust, the rigid section 210 will not bend under the thrust. In this way, the rigid section 210 will move toward the distal end of the insertion part 100 under the thrust. At this time, the friction generated by the rigid section 210 during movement is overcome by the thrust, rather than by the active bending section 120 relying on its own elasticity. The elasticity of the active bending section 120 itself only needs to overcome the friction generated by the part of the traction rope 200 located on the distal side of the rigid section 210 during movement. It can be seen that after adopting the structure of this embodiment, the friction that the active bending section 120 needs to overcome in the process of restoring from a bent state to a straight state can be reduced, thereby reducing the risk that the active bending section 120 cannot be completely restored to a straight state.

[0025] It should be noted that the insertion section 110 of the present application may be hard, in which case the endoscope may be a rigid endoscope; or the insertion section 110 may be a passive bending section, in which case the passive bending section may have greater rigidity, in which case the endoscope may be a flexible endoscope.

[0026] In order to further prevent the rigid section 210 from bending and deforming when being pushed, in an optional embodiment, the insertion section 110 has a wire harness structure 300, and the wire harness structure 300 is provided with a wire harness hole 310, which penetrates the wire harness structure 300 along the axial direction of the insertion section 110, and at least a portion of the rigid section 210 is penetrated in the wire harness hole 310. In this embodiment, the insertion section 110 has a wire harness structure 300, and the wire harness structure 300 is provided with a wire harness hole 310, and at least a portion of the rigid section 210 is penetrated in the wire harness hole 310, so that the inner wall of the wire harness structure 300 can stop and limit the rigid section 210 to prevent the rigid section 210 from bending and deforming, thereby further reducing the risk that the active bending section 120 cannot be completely restored to a straight state.

[0027] In some embodiments, the harness structure 300 can be formed by partially recessing the side wall of the insertion section 110. However, forming the harness structure 300 in this way will make the processing of the insertion assembly more complicated. In order to simplify the processing of the insertion assembly, in an optional embodiment, the harness structure 300 includes a harness tube, which is arranged along the extension direction of the rigid section 210. That is, the axis of the harness tube is parallel to the extension direction of the rigid section 210, and at least a portion of the rigid section 210 is inserted into the harness tube. In this embodiment, the harness structure 300 includes a harness tube, and at least a portion of the rigid section 210 is inserted into the harness tube. The rigid section 210 can be stopped and limited by the inner wall of the harness tube. In this way, it is only necessary to install the harness tube in the insertion section 110 without recessing the side wall 110 of the insertion section inward, which can simplify the processing of the insertion assembly. Optionally, the harness structure 300 may be connected to the inner wall of the insertion section 110 by welding, riveting, etc.; or, the harness structure 300 may also be connected to other components in the insertion section 110, which is not limited in the present application.

[0028] In order to locate the cable bundle tube at a preset position in the insertion section 110, in an optional embodiment, the insertion section 110 is provided with at least two through holes 111 spaced apart along the extension direction of the cable bundle tube, the through holes 111 penetrate from the outer circumference of the insertion section 110 to the inner circumference of the insertion section 110, each through hole 111 is opposite to the cable bundle tube, and the through holes 111 and the cable bundle tube are located on the same side of the insertion section 110. In this embodiment, at least two through holes 111 are provided on the insertion section 110 and are spaced apart along the extension direction of the cable bundle. The through holes 111 are opposite to the cable bundle, and the through holes 111 and the cable bundle are located on the same side of the insertion section 110. That is, the through holes 111 correspond to the preset positions of the cable bundle. In this way, when installing the cable bundle, it is only necessary to make the cable bundle and each through hole 111 opposite to each other. At this time, the human eye can observe different parts of the cable bundle through each through hole 111. At this time, the cable bundle is located at the preset position in the insertion section 110, which facilitates the installation of the cable bundle.

[0029] In another optional embodiment, the inner wall of the insertion section 110 is provided with a positioning groove (not shown in the figure), the positioning groove extends along the extension direction of the rigid section 210, and a portion of the cable harness tube in its own circumferential direction is positioned in the positioning groove. In this embodiment, the inner wall of the insertion section 110 is provided with a positioning groove, and a portion of the cable harness tube is positioned in the positioning groove, that is, the positioning groove is located at a preset position of the cable harness tube, so when installing the cable harness tube, it is only necessary to insert the cable harness tube into the positioning groove, and the cable harness tube is now located at a preset position in the insertion section 110, thereby facilitating the installation of the cable harness tube.

[0030] In some embodiments, a portion of the flexible segment 220 may be located in the harness hole 310. During the bending process of the active bending segment 120, the rigid segment 210 will move away from the distal end of the insertion portion 100. At this time, the rigid segment 210 will axially jump relative to the harness structure 300, thereby driving the flexible segment 220 to axially jump relative to the harness structure 300, which may cause the distal hole edge of the harness structure 300 to wear the flexible segment 220.

[0031] In order to reduce the risk of the flexible section 220 being worn by the distal hole edge of the harness structure 300, in an optional embodiment, the distal end of the rigid section 210 axially extends beyond the harness hole 310. In this embodiment, the distal end of the rigid section 210 axially extends beyond the harness hole 310. Since the flexible section 220 is disposed at the distal end of the rigid section 210, the flexible section 220 is located outside the harness hole 310. Thus, when the active bending section 120 bends, the flexible section 220 may not enter the harness hole 310, which can prevent the flexible section 220 from being worn by the hole edge of the harness hole 310 to a certain extent.

[0032] In an optional embodiment, when the traction rope 200 pulls the active bending section 120 to bend to the extreme position, the distal end surface of the rigid section 210 is flush with or exceeds the distal hole edge of the cable hole 310. In this embodiment, after the traction rope 200 pulls the active bending section 120 to bend to the extreme position, the traction rope 200 will not continue to move in the direction away from the distal end of the insertion portion 100. In this case, the distal end surface of the rigid section 210 is still flush with or exceeds the distal hole edge of the cable hole 310, that is, the rigid section 210 is still outside the cable hole 310, so that the flexible section 220 can be prevented from contacting the distal hole edge of the cable hole 310 during the movement, thereby preventing the distal hole edge of the cable hole 310 from wearing the flexible section 220.

[0033] like Figure 1 As shown, the embodiment of the present application also discloses an endoscope, including the insertion assembly described in any of the above embodiments. Since the endoscope of the embodiment of the present application includes the insertion assembly of any of the above embodiments, the endoscope of the embodiment of the present application also has the beneficial effects possessed by the above embodiments, and for the sake of simplicity, the present application will not elaborate on them.

[0034] The endoscope referred to in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose any specific restrictions on the type of endoscope.

[0035] In an optional embodiment, the endoscope further includes an operating handle 400, in which a driving assembly is provided, and the driving assembly includes a slider, which is fixedly connected to the proximal end of the rigid section 210, and the slider can slide relative to the operating handle 400 to pull or push the rigid section 210. Optionally, the slider can move axially relative to the operating handle 400, and when the slider moves along the proximal end close to the operating handle 400, the slider pulls the rigid section 210; when the slider moves along the proximal end away from the operating handle 400, the slider slides and pushes the rigid section 210. Of course, in addition to the slider, a traction wheel can also be used to drive the rigid section 210 to move.

[0036] It should be noted that the present application does not limit the driving method of the slider. For example, the slider can be driven to move manually, such as by providing an operating handle on the slider, with one end of the operating handle extending out of the operating handle 400, and the slider is moved by the operating handle 400; or a driving device can be provided to drive the slider to move.

[0037] The above embodiments of the present application focus on 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. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. An insertion assembly for an endoscope, characterized in that: The invention comprises an insertion part (100) and a traction rope (200), wherein the traction rope (200) is inserted into the insertion part (100), and the insertion part (100) comprises an insertion section (110) and an active bending section (120), wherein the active bending section (120) is arranged at the distal end of the insertion section (110). The traction rope (200) includes a rigid section (210) and a flexible section (220), the rigid section (210) has a stiffness greater than that of the flexible section (220), the distal end of the rigid section (210) is located in the insertion section (110), and the distal end of the rigid section (210) is connected to the distal end of the active bending section (120) through the flexible section (220), the proximal end of the rigid section (210) can be connected to a driving component of an endoscope, and the driving component can drive the rigid section (210) to move axially along the insertion section (110) to transmit the thrust or pull applied by the driving component to the rigid section (210).

2. The insert assembly according to claim 1, characterized in that The insertion section (110) has a wiring harness structure (300) therein, and the wiring harness structure (300) is provided with a wiring harness hole (310), the wiring harness hole (310) penetrates the wiring harness structure (300) along the axial direction of the insertion section (110), and at least a portion of the rigid section (210) is penetrated in the wiring harness hole (310).

3. The insert assembly according to claim 2, characterized in that The wire harness structure (300) comprises a wire harness tube, which is arranged along the extension direction of the rigid section (210), and at least a portion of the rigid section (210) is inserted into the wire harness tube.

4. The insert assembly according to claim 3, characterized in that The insertion section (110) is provided with at least two through holes (111) spaced apart along the extension direction of the cable harness tube, the through holes (111) extending from the outer circumference of the insertion section (110) to the inner circumference of the insertion section (110), each of the through holes (111) being opposite to the cable harness tube, and the through holes (111) and the cable harness tube being located on the same side of the insertion section (110).

5. The insert assembly according to claim 3, characterized in that The inner wall of the insertion section (110) is provided with a positioning groove, the positioning groove extends along the extension direction of the rigid section (210), and a portion of the cable harness tube in its circumferential direction is positioned in the positioning groove.

6. An insert assembly according to any one of claims 2 to 5, characterized in that The distal end of the rigid section (210) axially extends beyond the harness hole (310).

7. The insert assembly according to claim 6, characterized in that When the traction rope (200) pulls the active bending section (120) to bend to the extreme position, the distal end surface of the rigid section (210) is flush with or exceeds the distal hole edge of the cable hole (310).

8. The insert assembly according to claim 1, characterized in that The active bending section (120) is an integrally cut structure; and / or the active bending section (120) is an elastic tube section.

9. An endoscope, characterized in that: Comprising an insert assembly as claimed in any one of claims 1 to 8.

10. The endoscope according to claim 9, characterized in that The endoscope also includes an operating handle (400), wherein the driving assembly is disposed inside the operating handle (400), and the driving assembly includes a slider, wherein the slider is fixedly connected to the proximal end of the rigid section (210), and the slider can slide relative to the operating handle (400) to pull or push the rigid section (210).

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