Proximal end mounting structure of instrument channel and endoscope

Abstract

Provided is a proximal end mounting structure of an instrument channel and an endoscope. The proximal end mounting structure of the instrument channel comprises an instrument nozzle, an instrument channel, and a spring tube. The instrument nozzle is provided with a mounting hole, the proximal end of the instrument channel extends into the mounting hole, and the instrument channel is sleeved with the spring tube; the proximal end of the spring tube extends into the mounting hole, and the proximal end of the instrument channel is provided with a portion protruding from the proximal end of the spring tube. In the above solutions, by sleeving the proximal end portion of the instrument channel with the spring tube, an external support structure is provided for the proximal end portion of the instrument channel. When a treatment instrument abuts against the inner wall of the instrument channel to induce the instrument channel to have a deformation trend, the spring tube can effectively constrain the deformation of the instrument channel, thereby preventing the instrument channel from collapsing or deforming. In addition, the spring tube can follow the instrument channel to bend and deform to a certain extent, and has good adaptability, thereby ensuring effective support for the instrument channel.

Description

Instrument tube proximal end mounting structure and endoscope TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, and particularly relates to an instrument tube proximal end mounting structure and an endoscope. BACKGROUND

[0002] An endoscope comprises an operation handle and an insertion part. In actual operation, a pulling lever on the operation handle is actuated to drive a traction wheel to rotate, so as to adjust the posture of a bending section of the insertion part, thereby adjusting the orientation of a front end module and realizing functions such as fixed-point observation.

[0003] In related technologies, the instrument tube of an endoscope is usually made of soft material, so as to be flexible and adapt to complex structures in the human body. An instrument nozzle is arranged on the operation handle, and the proximal end of the instrument tube usually needs to be appropriately bent to be connected to the instrument nozzle. However, when a treatment instrument (for example, a biopsy forceps) is inserted from the instrument nozzle, the treatment instrument is easily abutted against the inner wall of the bent part of the proximal end of the instrument tube, and the proximal end part of the instrument tube is collapsed and shrunk. On the one hand, the collapsed and shrunk part of the instrument tube is easily clamped against the treatment instrument, which hinders the insertion or removal of the treatment instrument and affects the smooth progress of the operation. On the other hand, the collapse and shrink of the instrument tube will cause poor passability of the instrument tube and reduce the efficiency of negative pressure suction. Utility model content

[0004] The present application discloses an instrument tube proximal end mounting structure to solve the technical problem that the proximal end of the instrument tube in related technologies is easily collapsed and shrunk during insertion of a treatment instrument.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides an instrument tube proximal end mounting structure, which comprises an instrument nozzle, an instrument tube and a spring tube. The instrument nozzle is provided with a mounting hole. The proximal end of the instrument tube extends into the mounting hole. The spring tube is sleeved on the instrument tube. The proximal end of the spring tube extends into the mounting hole. The proximal end of the instrument tube has a part protruding from the proximal end of the spring tube.

[0007] Further, the mounting hole comprises a first hole section and a second hole section which are in communication. The first hole section is distributed at the proximal end of the second hole section. The opening size of the second hole section is greater than that of the first hole section, so as to define a first step surface therebetween. The instrument tube extends into the first hole section. The spring tube abuts against the first step surface.

[0008] Further, the instrument nozzle is provided with a first radial protrusion at the proximal end of the first hole section to form a second step surface, the instrument tube is stopped against the second step surface, and the protrusion thickness of the first radial protrusion matches the wall thickness of the instrument tube.

[0009] Further, the instrument nozzle is glued and fixed with the spring tube.

[0010] Further, the instrument tube proximal end mounting structure further comprises a guide, the guide is distributed at the distal end of the instrument nozzle, the spring tube is arranged between the guide and the instrument nozzle, the proximal end of the guide is provided with a guide hole, and the distal end of the spring tube extends into the guide hole.

[0011] Further, the guide hole comprises a first section guide hole, the first section guide hole is opened at the proximal end side of the guide, and along the extension direction of the guide from the proximal end to the distal end, the first section guide hole is in the shape of a neck, and the distal end of the spring tube can extend into the first section guide hole and abut against the inner wall of the first section guide hole.

[0012] Further, the guide hole further comprises a second section guide hole in communication with the first section guide hole, the second section guide hole is distributed at the distal end of the first section guide hole, the guide is provided with a second radial protrusion at the second section guide hole to form a third step surface, and the distal end of the spring tube can extend into the second section guide hole and stop against the third step surface.

[0013] Further, the spring tube comprises a first spiral section and a second spiral section extending from the proximal end to the distal end of the spring tube, the first spiral section is located in the mounting hole, and the pitch of the first spiral section is greater than the pitch of the second spiral section.

[0014] Further, the spring tube further comprises a third spiral section connected at the distal end of the second spiral section, and the pitch of the third spiral section is greater than the pitch of the second spiral section.

[0015] In the second aspect, the application further provides an endoscope comprising the aforementioned instrument tube proximal end mounting structure.

[0016] The technical scheme adopted by the application can achieve the following beneficial effects:

[0017] The instrument tube proximal end mounting structure of the present application provides an external support structure for the proximal end of the instrument tube by sleeving a spring tube on the proximal end portion of the instrument tube. When the treatment instrument abuts against the inner wall of the instrument tube and tends to deform the instrument tube, the spring tube can effectively constrain the deformation of the instrument tube, thereby avoiding the collapse or deformation of the instrument tube, ensuring the good passability of the instrument channel of the instrument tube, avoiding the situation of clamping the treatment instrument, and ensuring the smooth progress of the operation.

[0018] Meanwhile, due to the elastic deformation characteristics of the spring tube, the spring tube can follow the bending deformation of the instrument tube and has good adaptability, thereby ensuring that the instrument tube is always effectively externally supported. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Fig. 1 is a structural schematic view of the instrument tube proximal end mounting structure of the embodiment of the present application;

[0021] Fig. 2 is a cutaway schematic view of the instrument nozzle of the embodiment of the present application;

[0022] Fig. 3 is a cutaway schematic view of the guide of the embodiment of the present application;

[0023] Fig. 4 is a cutaway schematic view of the instrument tube proximal end mounting structure of the embodiment of the present application;

[0024] Fig. 5 is a structural schematic view of the endoscope of the embodiment of the present application.

[0025] In the drawings:

[0026] 10, operating handle; 20, insertion portion; 100, instrument nozzle; 110, mounting hole; 111, first hole section; 112, second hole section; 113, first step surface; 114, first radial protrusion; 115, second step surface; 200, instrument tube; 300, spring tube; 310, first spiral section; 320, second spiral section; 330, third spiral section; 400, guide; 410, guide hole; 411, first section guide hole; 412, second section guide hole; 413, second radial protrusion; 414, third step surface. DETAILED DESCRIPTION

[0027] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0028] The terms "first", "second", and the like 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 interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0029] The instrument tube proximal end mounting structure and endoscope provided by the embodiments of the present application will be described in detail below in combination with the specific embodiments and application scenarios of the present application.

[0030] Please refer to FIG. 1~FIG. 5, the embodiment of the application discloses a kind of instrument tube proximal end mounting structure, it is applied to endoscope, specifically, endoscope includes operating handle and the insertion part of connection operating handle, the instrument tube proximal end mounting structure disclosed includes instrument mouth 100, instrument tube 200 and spring pipe 300, wherein, instrument mouth 100 is located on operating handle, the distal end of instrument tube 200 extends to the distal end of insertion part, the proximal end of instrument tube 200 extends to operating handle, and it is opposite with instrument mouth 100.Specifically, please refer to FIG. 1 and FIG. 2, installation hole 110 is provided on instrument mouth 100, the proximal end of instrument tube 200 extends to installation hole 110, spring pipe 300 is sleeved on the proximal end tube section of instrument tube 200, the proximal end of spring pipe 300 also extends to installation hole 110, and the proximal end of instrument tube 200 has the part of protruding from the proximal end of spring pipe 300.Such arrangement, when installing and fixing instrument tube 200, installation hole 110 can be positioned and constrained to the part of protruding from the proximal end of spring pipe 300 of instrument tube 200, avoid the proximal end of instrument tube 200 to occur to jump, by spring pipe 300 being sleeved on the proximal end portion of instrument tube 200, spring pipe 300 can provide an external support structure for the proximal end of instrument tube 200, when treatment instrument and the inner wall of instrument tube 200 are resisted and promote instrument tube 200 to have deformation tendency, spring pipe 300 can effectively constrain the deformation of instrument tube 200 in any radial direction, to avoid the collapse or deformation of instrument tube 200, that is, the existence of spring pipe 300 does not allow instrument tube 200 to have the tendency of collapse and deformation, to ensure that the instrument channel of instrument tube 200 is good passability, avoid the situation of clamping and resisting treatment instrument, ensure the smooth progress of operation.

[0031] At the same time, due to the elastic deformation characteristics of spring pipe 300, during the installation or use of instrument tube 200, if instrument tube 200 is bent and deformed to a certain extent, spring pipe 300 can follow instrument tube 200 to bend and deform to a certain extent, that is, spring pipe 300 and instrument tube 200 have good adaptability, to ensure that instrument tube 200 is always effectively externally supported.

[0032] Please refer to FIG. 2 and FIG. 3, the mounting hole 110 comprises a first hole section 111 and a second hole section 112 which are connected in communication, wherein the first hole section 111 is distributed at the proximal end of the second hole section 112, the opening size of the second hole section 112 is larger than that of the first hole section 111, so as to form a first step surface 113 between them. In the embodiment of the present application, the opening size of the second hole section 112 is larger than the radial size of the spring tube 300, the radial size of the spring tube 300 is larger than the radial size of the first hole section 111, the proximal end of the spring tube 300 can be located in the second hole section 112 and stop against the aforementioned first step surface 113, the opening size of the first hole section 111 matches the radial size of the proximal end of the instrument tube 200, the proximal end of the instrument tube 200 extends into the first hole section 111, and the first hole section 111 can constrain the proximal end of the instrument tube 200 to avoid the arbitrary jumping of the proximal end of the instrument tube 200 in the radial direction, thereby improving the stability of the instrument tube 200 docking the instrument nozzle 100.

[0033] Please continue to refer to FIG. 2, the instrument nozzle 100 is provided with a first radial protrusion 114 at the proximal end of the first hole section 111, the first radial protrusion 114 has a second step surface 115 facing the distal end of the instrument nozzle 100, when the instrument tube 200 extends into the first hole section 111, the proximal end face of the instrument tube 200 can stop against the second step surface 115, that is, the second step surface 115 can play an axial limiting role on the instrument tube 200, when the proximal end of the instrument tube 200 abuts against the second step surface 115, the connection and fixation of the instrument tube 200 and the instrument nozzle 100 can be realized by means of gluing, so as to improve the installation convenience and stability after assembly of the instrument tube 200.

[0034] In a further technical solution, the radial inward protrusion thickness of the first radial protrusion 114 matches the wall thickness of the instrument tube 200, so that after the instrument tube 200 is assembled in place, the first radial protrusion 114 has no radial inward protruding part relative to the instrument tube 200, which does not reduce the channel size of the instrument channel of the instrument tube 200, reduces the size requirement of the instrument channel on the treatment instrument, that is, the instrument tube can allow a larger size treatment instrument to pass; at the same time, the end of the instrument tube 200 also has no radial inward protruding part relative to the first radial protrusion 114, which can avoid the proximal end face of the instrument tube 200 causing blocking interference to the treatment instrument during the placement of the treatment instrument, and improve the smoothness of the placement of the treatment instrument.

[0035] In the embodiment of the present application, the instrument mouth 100 is glued and fixed with the spring tube 300. Exemplarily, when the proximal end of the spring tube 300 abuts against the first step surface 113, the instrument mouth 100 can be glued and fixed with the proximal end of the spring tube 300 by injecting glue into the second hole section 112, so that the spring tube 300 can be prevented from moving randomly on the instrument tube 200, and the position of the spring tube 300 relative to the instrument tube 200 is ensured to be certain, that is, the spring tube 300 is stably sleeved on the proximal end of the instrument tube 200.

[0036] In the embodiment of the present application, referring to FIGS. 1, 3 and 4, the instrument tube proximal end mounting structure can further include a guide 400. When the instrument tube proximal end mounting structure is arranged in the operating handle, the guide 400 is arranged in the operating handle and distributed at the distal end of the instrument mouth 100. The spring tube 300 is arranged between the guide 400 and the instrument mouth 100. Exemplarily, the proximal end of the spring tube 300 is glued and fixed with the instrument mouth 100, and the distal end of the spring tube 300 is a free end and abuts against the guide 400.

[0037] In a further technical solution, referring to FIGS. 3 and 4, the proximal end of the guide 400 is provided with a guide hole 410, and the distal end of the spring tube 300 extends into the guide hole 410. The distal end of the spring tube 300 extends into the guide hole 410, so that the instrument tube 200 can be prevented from being directly in contact with the proximal hole edge of the guide hole 410 and being pressed to collapse.

[0038] In an optional embodiment of the present application, the guide hole 410 includes a first section guide hole 411. The first section guide hole 411 is arranged on the proximal end side of the guide 400 and extends from the proximal end to the distal end of the guide 400. The first section guide hole 411 is in the shape of a necking, and the distal end of the spring tube 300 can extend into the first section guide hole 411 and abut against the inner wall of the first section guide hole 411. The first section guide hole 411 in the shape of a necking can provide a certain avoiding space for the spring tube 300 in a curved state, so that the proximal hole edge of the first section guide hole 411 is prevented from abutting against the spring tube 300 and forcing the spring tube 300 to be bent, and the stable elastic performance of the spring tube 300 is ensured.

[0039] In a further technical solution, the guide hole 410 further comprises a second section guide hole 412 in communication with the first section guide hole 411, the second section guide hole 412 is distributed at the distal end of the first section guide hole 411, the radial dimension of the second section guide hole 412 matches the radial dimension of the distal end portion of the spring tube 300, the guide piece 400 is provided with a second radial protrusion 413 in the second section guide hole 412 to form a third step surface 414, the distal end of the spring tube 300 can extend into the second section guide hole 412 and stop against the third step surface 414. Through the constraint effect of the second section guide hole 412 and the third step surface 414, the distal end of the spring tube 300 can be better constrained, and the stability of the spring tube 300 sleeved on the instrument tube 200 is improved.

[0040] In an optional embodiment of the present application, the spring tube 300 is composed of a plurality of helical units connected in sequence, and the pitches between two adjacent helical units of the spring tube 300 are the same, so that the spring tube 300 has the characteristics of convenient processing.

[0041] In an optional embodiment of the present application, please refer to FIG. 2, FIG. 3 and FIG. 4, the spring tube 300 can further comprise a first helical section 310 and a second helical section 320 extending from the proximal end to the distal end thereof, the first helical section 310 and the second helical section 320 both comprise a plurality of helical units, the first helical section 310 is located in the mounting hole 110, and the second helical section 320 is located outside the mounting hole 110, the pitch of the first helical section 310 is greater than the pitch of the second helical section 320, so that when injecting glue into the mounting hole 110, the gaps between the plurality of helical units of the first helical section 310 are larger, the glue can fully contact the proximal end portion of the instrument tube 200 through the gaps, and a better enveloping effect is formed on the first helical section 310, thereby improving the stability of the connection among the instrument nozzle 100, the instrument tube 200 and the spring tube 300.

[0042] In a further technical solution, the spring tube 300 can further include a third spiral section 330 connected to the distal end of the second spiral section 320, the third spiral section 330 having a larger pitch than the second spiral section 320. In this way, when the second spiral section 320 and the third spiral section 330 have the same radial dimension, the third spiral section 330 is more likely to elastically deform when subjected to an axial force. When assembling the instrument mouth 100, the instrument tube 200, the spring tube 300, and the guide 400, the instrument tube 200 can be first inserted through the guide 400, and then the spring tube 300 can be sleeved on the instrument tube 200 from the proximal end of the instrument tube 200. An axial force is applied to the spring tube 300, so that the third spiral section 330 abuts against the guide 400 and can be compressed to enable the proximal end of the instrument tube 200 to abut against the instrument mouth 100. When the axial force applied to the spring tube 300 is removed, the third spiral section 330 can recover from the deformation, so that the proximal end of the spring tube 300 abuts against the mounting hole 110. In this way, the convenience of assembling the proximal end mounting structure of the instrument tube can be improved, and the both ends of the spring tube 300 can be subjected to abutting forces.

[0043] The endoscope disclosed in the embodiments of the present application includes an operating handle 10 and an insertion portion 20 connected to the operating handle 10. The distal end of the instrument tube 200 extends to the distal end of the insertion portion 20, the proximal end of the instrument tube 200 extends into the operating handle 10 and abuts against the instrument mouth 100 on the operating handle 10, and the spring tube 300 is located in the operating handle 10 and sleeved on the instrument tube 200.

[0044] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or devices that comprise a list of elements do not include only those elements, but also other elements that are not expressly listed, or other elements that are inherent in such processes, methods, articles, or devices. Without more limitations, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0045] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A proximal instrument tube mounting structure for use in endoscopes, characterized in that, The utility model provides an instrument mouth (100), instrument tube (200) and spring tube (300) including, wherein: The instrument tube (200) of near end extends to the mounting hole (110) inside, the spring tube (300) is set on the instrument tube (200), the near end of spring tube (300) extends to the mounting hole (110) inside, and the near end of instrument tube (200) has the part of protruding from the near end of spring tube (300).

2. The instrument tube proximal end mounting structure according to claim 1, characterized by The mounting hole (110) includes the first hole section (111) and the second hole section (112) of intercommunication, wherein, the first hole section (111) distributes in the near end of second hole section (112), the opening size of second hole section (112) is greater than the opening size of first hole section (111), to define first step surface (113) between the two, the instrument tube (200) extends to the first hole section (111) inside, and the spring tube (300) stops at first step surface (113).

3. The instrument tube proximal end mounting structure according to claim 2, characterized by The instrument mouth (100) is provided with first radial protrusion (114) to form second step surface (115) in the near end of first hole section (111), the instrument tube (200) stops at second step surface (115), and the protruding thickness of first radial protrusion (114) is matched with the wall thickness of instrument tube (200).

4. The instrument tube proximal end mounting structure according to claim 1, characterized by The instrument mouth (100) and spring tube (300) are glued and fixed.

5. The instrument tube proximal end mounting structure according to Claim 1, wherein Still including guide piece (400), the guide piece (400) distributes in the distal end of instrument mouth (100), the spring tube (300) is located between guide piece (400) and instrument mouth (100), and the near end of guide piece (400) is provided with guide hole (410), and the distal end of spring tube (300) extends to the guide hole (410) inside.

6. The instrument tube proximal end mounting structure according to claim 5, characterized by The guide hole (410) includes first section guide hole (411), the first section guide hole (411) is opened in the near end side of guide piece (400), along the extension direction of guide piece (400) from the near end to the distal end, the first section guide hole (411) is in the shape of necking, and the distal end of spring tube (300) can extend to the first section guide hole (411) and abuts to the inner wall of first section guide hole (411).

7. The instrument tube proximal end mounting structure according to claim 6, characterized by The guide hole (410) also includes the second section guide hole (412) of intercommunication with first section guide hole (411), and the second section guide hole (412) distributes in the distal end of first section guide hole (411), and the second radial protrusion (413) of guide piece (400) is provided with in the second section guide hole (412) to form third step surface (414), and the distal end of spring tube (300) can extend to the second section guide hole (412) and stop at third step surface (414).

8. The instrument tube proximal end mounting structure according to any one of claims 1 to 7, characterized by The spring tube (300) comprises a first spiral section (310) and a second spiral section (320) extending from a proximal end to a distal end thereof, the first spiral section (310) is located in the mounting hole (110), and a pitch of the first spiral section (310) is greater than a pitch of the second spiral section (320).

9. The instrument tube proximal end mounting structure according to claim 8, characterized by The spring tube (300) further comprises a third spiral section (330) connected to a distal end of the second spiral section (320), and a pitch of the third spiral section (330) is greater than the pitch of the second spiral section (320).

10. An endoscope characterized by comprising: An instrument tube proximal end mounting structure comprising any one of claims 1-9.

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