Instrument tube near-end mounting structure and endoscope

Abstract

The utility model relates to the technical field of endoscopes, and particularly discloses an instrument tube near-end installation structure and an endoscope, the instrument tube near-end installation structure comprises an instrument mouth, an instrument tube and a spring tube, the instrument mouth is provided with an installation hole, the near end of the instrument tube extends into the installation hole, the spring tube is sleeved on the instrument tube, and the installation hole is formed in the instrument mouth. The near end of the bourdon tube extends into the mounting hole, and the near end of the instrument tube is provided with a part protruding out of the near end of the bourdon tube; according to the scheme, the spring tube is arranged at the near end of the instrument tube in the sleeving mode, an external supporting structure is provided for the near end of the instrument tube, and when the treatment instrument abuts against the inner wall of the instrument tube to enable the instrument tube to have the deformation tendency, the spring tube can effectively restrain deformation of the instrument tube; therefore, collapse or deformation of the instrument tube is avoided, the spring tube can be bent and deformed to a certain extent along with the instrument tube, good adaptability is achieved, and effective supporting of the instrument tube is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an instrument tube proximal end mounting structure and an endoscope. Background Art

[0002] The endoscope includes an operating handle and an insertion part. In actual operation, the traction wheel is driven to rotate by turning the lever on the operating handle to adjust the posture of the curved section of the insertion part, thereby adjusting the direction of the front end module to achieve functions such as fixed-point observation.

[0003] In the related art, the instrument tube of the endoscope is usually made of soft material so that it can be flexibly bent and adapt to the complex structure in the human body. The operating handle is provided with an instrument mouth, and the proximal end of the instrument tube usually needs to be appropriately bent to connect with the instrument mouth. However, when inserting a treatment instrument (such as a biopsy forceps) from the instrument mouth, the treatment instrument is likely to abut against the inner wall of the curved portion of the proximal end of the instrument tube, causing the proximal end of the instrument tube to collapse and deflate. On the one hand, the collapsed and deflated portion of the instrument tube is likely to clamp against the treatment instrument, hindering the insertion or removal of the treatment instrument and affecting the smooth progress of the operation. On the other hand, the collapse and deflation of the instrument tube will cause the permeability of the instrument tube to deteriorate, and the efficiency during negative pressure suction will be reduced. Utility Model Content

[0004] The utility model discloses a proximal end mounting structure of an instrument tube, which is used to solve the technical problem in the related art that the proximal end of the instrument tube is easy to collapse and deflate during the process of inserting a treatment instrument.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] In a first aspect, the present application provides an instrument tube proximal mounting structure, which includes an instrument nozzle, an instrument tube and a spring tube, wherein 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, and the proximal end of the instrument tube has a portion protruding from the proximal end of the spring tube.

[0007] Furthermore, the mounting hole includes a first hole segment and a second hole segment that are connected, wherein the first hole segment is distributed at the proximal end of the second hole segment, and the opening size of the second hole segment is larger than the opening size of the first hole segment, so as to define a first step surface therebetween, the instrument tube extends into the first hole segment, and the spring tube stops at 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 abuts against the second step surface, and the thickness of the first radial protrusion matches the wall thickness of the instrument tube.

[0009] Further, the instrument nozzle is adhesively fixed to the spring tube.

[0010] Further, the proximal end mounting structure of the instrument tube further includes a guide member, the guide members are distributed at the distal end of the instrument nozzle, the spring tube is disposed between the guide member and the instrument nozzle, a guide hole is provided at the proximal end of the guide member, and the distal end of the spring tube extends into the guide hole.

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

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

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

[0014] Further, the spring tube further includes a third helical section connected to the distal end of the second helical section, and the pitch of the third helical section is greater than the pitch of the second helical section.

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

[0016] The technical solution adopted by the present utility model can achieve the following beneficial effects:

[0017] The proximal installation structure of the instrument tube of the present application provides an external support structure for the proximal part of the instrument tube by sleeving a spring tube on the proximal part of the instrument tube. When the treatment instrument abuts against the inner wall of the instrument tube and causes the instrument tube to have a tendency to deform, the spring tube can effectively restrain the deformation of the instrument tube, thereby preventing the instrument tube from collapsing or deforming, ensuring good passability of the instrument channel of the instrument tube, avoiding the situation of pinching the treatment instrument, and ensuring the smooth progress of the operation.

[0018] At the same time, due to its own elastic deformation characteristics, the spring tube can follow the instrument tube to undergo a certain amount of bending deformation, with good adaptability, thereby ensuring that an effective external support is always formed for the instrument tube. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the proximal installation structure of the instrument tube of the embodiment of the present application;

[0021] Figure 2 is a sectional view of the instrument nozzle of the embodiment of the present application;

[0022] Figure 3 is a sectional view of the guide member of the embodiment of the present application;

[0023] Figure 4 is a sectional view of the proximal installation structure of the instrument tube of the embodiment of the present application;

[0024] Figure 5 is a schematic structural diagram of the endoscope of the embodiment of the present application.

[0025] In the figure:

[0026] 10. Operating handle; 20. Insertion part; 100. Instrument nozzle; 110. Installation 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 member; 410. Guide hole; 411. First section guide hole; 412. Second section guide hole; 413. Second radial protrusion; 414. Third step surface. Detailed Embodiments

[0027] 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.

[0028] 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.

[0029] The following is combined with Figures 1 to 5 , the instrument tube proximal installation structure and the endoscope provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0030] See also Figures 1~5 , the embodiment of the present application discloses an instrument tube proximal installation structure, which is applied to an endoscope. Specifically, the endoscope includes an operating handle and an insertion portion connected to the operating handle. The disclosed instrument tube proximal installation structure includes an instrument mouth 100, an instrument tube 200 and a spring tube 300, wherein the instrument mouth 100 is arranged on the operating handle, the distal end of the instrument tube 200 extends to the distal end of the insertion portion, and the proximal end of the instrument tube 200 extends into the operating handle and is connected to the instrument mouth 100. Specifically, please refer to Figure 1 and Figure 2A mounting hole 110 is provided on the instrument mouth 100, the proximal end of the instrument tube 200 extends into the mounting hole 110, the spring tube 300 is sleeved on the proximal tube section of the instrument tube 200, the proximal end of the spring tube 300 also extends into the mounting hole 110, and the proximal end of the instrument tube 200 has a portion protruding from the proximal end of the spring tube 300. Under such a configuration, when the instrument tube 200 is installed and fixed, the installation hole 110 can position and constrain the portion of the instrument tube 200 that protrudes from the proximal end of the spring tube 300 to prevent the proximal end of the instrument tube 200 from jumping. By sleeved with the spring tube 300 on the proximal end of the instrument tube 200, the spring tube 300 can provide an external support structure for the proximal end of the instrument tube 200. When the treatment instrument abuts against the inner wall of the instrument tube 200 and causes the instrument tube 200 to have a deformation tendency, the spring tube 300 can effectively constrain the deformation of the instrument tube 200 in any radial direction, thereby preventing the instrument tube 200 from collapsing or deforming. That is, the existence of the spring tube 300 does not allow the instrument tube 200 to have a tendency to become deflated and deformed, thereby ensuring good passability of the instrument channel of the instrument tube 200, avoiding the situation of clamping the treatment instrument, and ensuring the smooth progress of the operation.

[0031] At the same time, due to its own elastic deformation characteristics, during the installation or use of the instrument tube 200, if the instrument tube 200 undergoes a certain degree of bending deformation, the spring tube 300 can follow the instrument tube 200 to undergo a certain degree of bending deformation, that is, the spring tube 300 has good adaptability with the instrument tube 200, thereby ensuring that effective external support is always formed for the instrument tube 200.

[0032] See also Figure 2 and Figure 3 The mounting hole 110 includes a first hole section 111 and a second hole section 112 that are connected, wherein the first hole section 111 is located at the proximal end of the second hole section 112, and the opening size of the second hole section 112 is larger than the opening size of the first hole section 111, so as to form a first step surface 113 between the two. 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, and 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 on 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 prevent the proximal end of the instrument tube 200 from randomly jumping in the radial direction, thereby improving the stability of the instrument tube 200 docking the instrument nozzle 100.

[0033] Please continue to see Figure 2The instrument mouth 100 is provided with a first radial protrusion 114 at the proximal end of the first hole section 111, and the first radial protrusion 114 has a second step surface 115 facing the distal end of the instrument mouth 100. When the instrument tube 200 extends into the first hole section 111, the proximal end surface of the instrument tube 200 can stop at the second step surface 115, that is, the second step surface 115 can play an axial limiting role for 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 mouth 100 can be achieved by gluing, thereby improving the convenience of installation of the instrument tube 200 and the stability after assembly.

[0034] In a further technical solution, the radially inward protrusion thickness of the first radial protrusion 114 matches the wall thickness of the instrument tube 200. In this way, after the instrument tube 200 is assembled in place, the first radial protrusion 114 has no radially inward protrusion relative to the instrument tube 200, and will not limit the channel size of the instrument channel of the instrument tube 200, thereby reducing the size requirements of the instrument channel for the treatment instrument, that is, the instrument tube can allow larger-sized treatment instruments to pass through; at the same time, the end of the instrument tube 200 also has no radially inward protrusion relative to the first radial protrusion 114, which can avoid the proximal end of the instrument tube 200 from causing obstruction and interference with the treatment instrument during the insertion of the treatment instrument, thereby improving the smoothness of the insertion of the treatment instrument.

[0035] In the embodiment of the present application, the instrument nozzle 100 is glued and fixed to the spring tube 300. For example, when the proximal end of the spring tube 300 stops at the first step surface 113, the instrument nozzle 100 can be glued and fixed to the proximal end of the spring tube 300 by injecting glue into the second hole section 112. This can prevent the spring tube 300 from jumping around on the instrument tube 200 at will, thereby ensuring the certainty of the position of the spring tube 300 relative to the instrument tube 200, even if the spring tube 300 is stably mounted on the proximal end of the instrument tube 200.

[0036] In the examples of this application, see Figure 1 , Figure 3 and Figure 4 The proximal installation structure of the instrument tube may further include a guide 400. When the proximal installation structure of the instrument tube is disposed on the operating handle, the guide 400 is located in the operating handle and is distributed at the distal end of the instrument mouth 100. The spring tube 300 is disposed between the guide 400 and the instrument mouth 100. For example, the proximal end of the spring tube 300 is glued and fixed to the instrument mouth 100, and the distal end of the spring tube 300 is a free end and abuts against the guide 400.

[0037] For further technical solutions, please continue to refer to Figure 3 and Figure 4, a guiding hole 410 is provided at the proximal end of the guiding member 400. The distal end of the spring tube 300 extends into the guiding hole 410. The distal end of the spring tube 300 extending into the guiding hole 410 can prevent the instrument tube 200 from directly contacting the proximal hole edge of the guiding hole 410 and being compressed and collapsed.

[0038] In an alternative embodiment of the present application, the guiding hole 410 includes a first-stage guiding hole 411. The first-stage guiding hole 411 is opened on the proximal side of the guiding member 400. Along the extending direction of the guiding member 400 from the proximal end to the distal end, the first-stage guiding hole 411 is in a flared shape. The distal end of the spring tube 300 can extend into the first-stage guiding hole 411 and abut against the inner wall of the first-stage guiding hole 411. The flared first-stage guiding hole 411 can provide a certain avoidance space for the bent spring tube 300, preventing the proximal hole edge of the first-stage guiding hole 411 from abutting against the spring tube 300 and forcing the spring tube 300 to bend, and ensuring the stable elastic performance of the spring tube 300.

[0039] In a further technical solution, the guiding hole 410 further includes a second-stage guiding hole 412 communicating with the first-stage guiding hole 411. The second-stage guiding hole 412 is distributed at the distal end of the first-stage guiding hole 411. The radial dimension of the second-stage guiding hole 412 matches the radial dimension of the distal part of the spring tube 300. The guiding member 400 is provided with a second radial protrusion 413 in the second-stage guiding hole 412 to form a third step surface 414. The distal end of the spring tube 300 can extend into the second-stage guiding hole 412 and abut against the third step surface 414. Through the restraining action of the second-stage guiding hole 412 and the third step surface 414, a better restraining effect can be exerted on the distal end of the spring tube 300, improving the stability of the spring tube 300 sleeved on the instrument tube 200.

[0040] In an alternative embodiment of the present application, the spring tube 300 is composed of a plurality of spiral units connected in sequence, and the pitch between two adjacent spiral units of the spring tube 300 is the same. In this way, the spring tube 300 has the characteristic of convenient processing.

[0041] In an alternative embodiment of the present application, please refer to Figure 2 , Figure 3 and Figure 4, the bourdon tube 300 may further include a first helical section 310 and a second helical section 320 extending from its proximal end to its distal end. Both the first helical section 310 and the second helical section 320 include a plurality of helical units. The first helical section 310 is located within 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 that of the second helical section 320. In this way, when injecting glue into the mounting hole 110, the gap between the plurality of helical units of the first helical section 310 is larger, and the glue can pass through the gap to fully contact the proximal end of the instrument tube 200, and form a better enveloping effect on the first helical section 310, thereby improving the stability of the connection among the instrument nozzle 100, the instrument tube 200, and the bourdon tube 300.

[0042] In a further technical solution, the bourdon tube 300 may further include a third helical section 330 connected to the distal end of the second helical section 320. The pitch of the third helical section 330 is greater than that of the second helical section 320. With such a setting, when the radial dimensions of the second helical section 320 and the third helical section 330 are the same, the third helical section 330 is more likely to undergo elastic deformation when subjected to an axial force. When assembling the instrument nozzle 100, the instrument tube 200, the bourdon tube 300, and the guide member 400, the instrument tube 200 can be first passed through the guide member 400, and then the bourdon tube 300 is sleeved on the instrument tube 200 from the proximal end of the instrument tube 200. An axial force is applied to the bourdon tube 300 to make the third helical section 330 abut against the guide member 400 and be compressed so that the proximal end of the instrument tube 200 is docked with the instrument nozzle 100. After canceling the axial force applied to the bourdon tube 300, the third helical section 330 can recover its deformation so that the proximal end of the bourdon tube 300 abuts within the mounting hole 110. In this way, the convenience of assembling the proximal mounting structure of the entire instrument tube can be improved, and both ends of the bourdon tube 300 can be subjected to abutting forces.

[0043] The embodiment of the present application also discloses an endoscope. Please refer to Figure 4 and Figure 5 , the disclosed endoscope includes an operation handle 10 and an insertion portion 20 connected to the operation handle 10. The distal end of the instrument tube 200 extends to the distal end of the insertion portion 20, and the proximal end of the instrument tube 200 extends into the operation handle 10 and is docked with the instrument nozzle 100 on the operation handle 10. The bourdon tube 300 is located within the operation handle 10 and is sleeved on the instrument tube 200.

[0044] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that 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, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0045] As described above, the above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model.

Claims

1. An instrument tube proximal end mounting structure, applied to an endoscope, characterized in that: It comprises an instrument mouth (100), an instrument tube (200) and a spring tube (300); wherein: The instrument mouth (100) is provided with a mounting hole (110), the proximal end of the instrument tube (200) extends into the mounting hole (110), the spring tube (300) is sleeved on the instrument tube (200), the proximal end of the spring tube (300) extends into the mounting hole (110), and the proximal end of the instrument tube (200) has a portion protruding from the proximal end of the spring tube (300).

2. The instrument tube proximal end mounting structure according to claim 1, characterized in that: The mounting hole (110) comprises a first hole section (111) and a second hole section (112) which are connected to each other, 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 the opening size of the first hole section (111), so as to define a first step surface (113) therebetween, the instrument tube (200) extends into the first hole section (111), and the spring tube (300) stops at the first step surface (113).

3. The proximal end mounting structure of the instrument tube according to claim 2, characterized in that: The instrument mouth (100) is provided with a first radial protrusion (114) at the proximal end of the first hole section (111) to form a second step surface (115), the instrument tube (200) abuts against the second step surface (115), and the protrusion thickness of the first radial protrusion (114) matches the wall thickness of the instrument tube (200).

4. The instrument tube proximal end mounting structure according to claim 1, characterized in that: The instrument mouth (100) is glued and fixed to the spring tube (300).

5. The instrument tube proximal end mounting structure according to claim 1, characterized in that: The invention also comprises a guide member (400), wherein the guide member (400) is distributed at the distal end of the instrument mouth (100), the spring tube (300) is arranged between the guide member (400) and the instrument mouth (100), a guide hole (410) is arranged at the proximal end of the guide member (400), and the distal end of the spring tube (300) extends into the guide hole (410).

6. The instrument tube proximal end mounting structure according to claim 5, characterized in that: The guide hole (410) comprises a first section guide hole (411), the first section guide hole (411) being opened at the proximal side of the guide member (400), and the first section guide hole (411) being in a constricted shape along the extension direction of the guide member (400) from the proximal end to the distal end, 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).

7. The instrument tube proximal end mounting structure according to claim 6, characterized in that: The guide hole (410) further comprises a second section guide hole (412) connected to the first section guide hole (411); the second section guide hole (412) is located at the distal end of the first section guide hole (411); the guide member (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 at the third step surface (414).

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

9. The instrument tube proximal end mounting structure according to claim 8, characterized in that: The spring tube (300) further comprises a third helical segment (330) connected to the distal end of the second helical segment (320), the pitch of the third helical segment (330) being greater than the pitch of the second helical segment (320).

10. An endoscope, characterized in that: It comprises the proximal end mounting structure of the instrument tube according to any one of claims 1 to 9.

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