Insertion portion and endoscope

Abstract

The present invention relates to the technical field of endoscopes, and specifically discloses an insertion part and an endoscope, wherein the insertion part comprises a lens seat, an instrument tube and a cylindrical film, wherein the lens seat has a receiving hole, the distal end of the instrument tube extends into the receiving hole, the cylindrical film connects the lens seat and the instrument tube, and the instrument tube has a first state and a second state, wherein in the first state, the distal end of the instrument tube is hidden in the receiving hole, and in the second state, the distal end of the instrument tube extends out of the receiving hole, and the cylindrical film is configured to shorten axially when the instrument tube is twisted, so as to drive the instrument tube to switch from the first state to the second state; the radial dimension of the insertion part in the first state is relatively small, which is conducive to probing into a human body cavity, and after the insertion part reaches the target position, the operator twists the proximal end of the instrument tube, and drives the entire instrument tube to twist, and the cylindrical film shortens axially, so that the instrument tube moves axially and switches to the second state, thereby facilitating surgical operations by surgical instruments.

Description

Technical Field

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

[0002] An endoscope is a medical device that inserts an insertion part into the human body and observes the internal tissues of the human body through a camera module at the distal end of the insertion part. It can help doctors determine the location of lesions in the patient's body and the tissue structure characteristics of the lesion location. An 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 active bending section of the insertion part, thereby adjusting the direction of the distal module to achieve fixed-point observation and other functions.

[0003] In the related art, the insertion portion of the endoscope is limited by the narrow operating environment of the endoscope, so the outer diameter of the insertion portion must be maintained at a certain size. If the size of the insertion portion is large, it may encounter greater obstacles during the insertion process. When encountering a curved or narrow cavity, scratches or crushing injuries are more likely to occur, increasing the patient's pain and stress response; if the size of the insertion portion is small, the size of the instrument tube inserted therein is smaller. The smaller instrument tube size means that only surgical instruments of specific sizes and types can pass through, which puts higher requirements on the surgical instruments inserted in the instrument tube. During suction operations, smaller instrument tubes are more likely to be blocked by tissue fragments, blood or other fluids, requiring additional cleaning and unblocking steps, thereby prolonging the operation time and increasing risks. Summary of the invention

[0004] The present invention discloses an insertion part and an endoscope to solve the above technical problems existing in the related art.

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

[0006] In a first aspect, the present application provides an insertion portion, the insertion portion comprising:

[0007] A lens mount, wherein the lens mount has a receiving hole penetrating the lens mount;

[0008] an instrument tube, the distal end of which extends into the receiving hole;

[0009] A cylindrical film, wherein the cylindrical film is a structural member made of a non-elastic material, the distal end of the cylindrical film is connected to the lens holder, and the proximal end of the cylindrical film is connected to the instrument tube;

[0010] The instrument tube has a first state and a second state. In the first state, the distal end of the instrument tube is hidden in the accommodating hole. In the second state, the distal end of the instrument tube extends out of the accommodating hole. The tubular film is configured to shorten axially when the instrument tube is twisted, so as to drive the instrument tube to switch from the first state to the second state.

[0011] Furthermore, a first adapter is provided at the proximal end of the lens mount, and a second adapter is provided at the distal end of the instrument tube. The first adapter and the second adapter are both annular structures, and both ends of the tubular film are respectively connected to the first adapter and the second adapter.

[0012] Furthermore, the first adapter is integrally formed with the lens mount, or a portion of the first adapter is embedded in the accommodating hole, and the first adapter is glued and fixed to the lens mount; and / or the second adapter is glued and fixed to the instrument tube.

[0013] Furthermore, a diameter of the second adapter is greater than a diameter of the first adapter.

[0014] Furthermore, a first gap is provided between the inner wall of the tubular film and the outer wall of the first adapter.

[0015] Furthermore, the lens mount includes a first part and a second part, the first part is connected to the distal end of the second part, the radial dimension of the first part is smaller than the radial dimension of the second part, and in a first direction, the radial dimension of the first part gradually increases to be connected to the second part, and the accommodating hole runs through the first part and the second part.

[0016] Furthermore, the accommodating hole passes through the distal wall of the first part and the side wall of the first part, and the lens mount also has an elastic skin covering the circumference of the first part, and the elastic skin is configured to apply elastic constraints to the distal end of the instrument tube when the instrument tube is in the second state.

[0017] Further, in the first state, along the axial direction of the lens mount, the portion of the tubular film distributed on the first adapter has a first extension length, and a second gap is provided between the proximal end of the first adapter and the distal end of the second adapter, and the first extension length is greater than the second extension length of the second gap in the axial direction of the lens mount.

[0018] Further, in the first state, the distal end portion of the instrument tube is hidden in the second portion, and in the second state, alternatively, the distal end wall of the instrument tube protrudes from the distal end wall of the first portion.

[0019] In a second aspect, the present application also provides an endoscope, comprising the aforementioned insertion portion.

[0020] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0021] In the insertion part and the endoscope of the present application, in the initial state, the cylindrical film is not deformed, the instrument tube is in the first state, the distal end of the instrument tube is hidden in the receiving hole of the lens holder, and the radial dimension of the distal end of the insertion part is small, which is conducive to the insertion into the human body cavity. The small radial dimension makes it easier for the insertion part to pass through the narrow or curved cavity of the human body, reducing the friction and pressure on the surrounding tissues of the cavity, which helps to reduce the pain and discomfort of the patient, making the entire insertion part The process of inserting the human body cavity is safer and more comfortable;

[0022] After the distal end of the insertion portion reaches the target position, the proximal end of the instrument tube can be twisted, and the distal end of the instrument tube can be twisted. Since the position of the lens seat remains unchanged, the tubular film is twisted and deformed along with the instrument tube. Since the tubular film is a structural member made of non-elastic material, wrinkles are generated in the tubular film during this process and the axial dimension is reduced, thereby driving the distal end of the instrument tube to protrude outward and be in the second state of being extended and exposed. The radial dimension of the instrument tube protruding outward relative to the lens seat is smaller than the radial dimension of the lens seat, so that the instrument tube can reach a narrower cavity and provide stable support performance for the surgical operation of the surgical instrument, thereby ensuring the smooth progress of the surgical operation.

[0023] At the same time, in the embodiment of the present application, a cylindrical film is used to connect the lens seat and the distal end of the instrument tube, and the connection method is simpler. Moreover, compared with the driving method of applying a thrust from the proximal end of the instrument tube to extend the instrument tube out of the lens seat, the method of deforming the cylindrical film and pulling the instrument tube to extend outward directly acts on the distal end of the instrument tube. Therefore, it can more effectively overcome the deformation problem caused by factors such as the material of the instrument tube or the shape of the cavity, making the extension method of the distal end of the instrument tube more direct and effective, that is, it can effectively improve the stability of the instrument tube relative to the lens seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic structural diagram of the insertion portion of an embodiment of the present application when the instrument tube is in a first state;

[0026] Figure 2 is a schematic cross-sectional view of an insertion portion of an embodiment of the present application;

[0027] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0028] Figure 4 It is a schematic structural diagram of the insertion portion of an embodiment of the present application when the instrument tube is in the second state.

[0029] In the figure:

[0030] 100, lens mount; 110, first part; 120, second part; 130, accommodating hole; 140, first adapter; 200, instrument tube; 210, second adapter; 300, tubular film; 400, camera module; 500, light source; 600a, first gap; 600b, second gap. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] 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.

[0033] The present application discloses an insertion portion and an endoscope. Figures 1 to 4 , the insertion part and the endoscope provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0034] See also Figure 1 and Figure 2The embodiment of the present application discloses an insertion portion, which includes a lens mount 100 and an instrument tube 200, wherein the lens mount 100 has a receiving hole 130 that passes through the lens mount 100. Exemplarily, the receiving hole 130 passes through the lens mount 100 along the axial direction of the lens mount 100. The receiving hole 130 is used to receive the distal end of the instrument tube 200, that is, the distal end of the instrument tube 200 extends into the receiving hole 130. The instrument tube 200 has an instrument channel that passes through it along its axial direction. The instrument channel is used to accommodate and penetrate surgical instruments during surgical operations. When surgical instruments are inserted into the instrument tube 200, the surgical instruments can protrude outward through the distal end opening of the instrument channel.

[0035] See also Figure 3 and Figure 4 The lens holder 100 includes a first portion 110 and a second portion 120, wherein the first portion 110 is connected to the distal end of the second portion 120. For example, the first portion 110 and the second portion 120 may be integrally formed by injection molding, and the accommodating hole 130 passes through the first portion 110 and the second portion 120. In order to facilitate the distinction between the first portion 110 and the second portion 120, Figure 1 and Figure 4 The middle dotted line is a dividing line between the first portion 110 and the second portion 120 .

[0036] In the embodiment of the present application, the radial dimension of the first part 110 is smaller than the radial dimension of the second part 120. For example, along the extension direction of the lens holder 100 from its distal end to its proximal end, the radial dimension of the first part 110 gradually increases to connect with the second part 120. That is to say, the radial dimension of the first part 110 in the axial direction of the lens holder 100 is gradual. The accommodating hole 130 axially penetrates the distal end wall of the first part 110 and the side wall of the first part 110 to form a side opening. The first part 110 can provide an installation basis for the camera module 400 and the light source 500 of the endoscope, that is, the camera module 400 and the light source 500 are arranged in the first part 110 of the lens holder 100 to constitute the front end component of the insertion part. In the initial state, that is, when the instrument tube 200 is in the first state, the distal end of the instrument tube 200 extends to the second part 120 of the lens holder 100.

[0037] The lens holder 100 adopts a structural design with a small front end and a large rear end. The camera module 400 and the light source 500 are arranged in the first part 110 at the front end, and the distal end of the instrument tube 200 is accommodated in the second part 120. This layout can prevent the distal end of the instrument tube 200 from extending to the first part 110 and occupying a large radial space together with the first part 110, thereby making the radial size of the distal end of the front end component, i.e., the first part 110, smaller, thereby facilitating the distal end of the insertion portion to penetrate into the human body cavity, reducing friction and pressure on the surrounding tissues of the cavity, and helping to reduce the patient's pain and discomfort.

[0038] During the research process, the inventors found that in the endoscopes of related technologies, the radial dimension of the instrument tube is usually smaller than the radial dimension of the lens seat, and the distal end of the instrument tube usually extends to the distal wall of the lens seat, or is embedded in the lens seat. The position reached by the lens seat is often the position that the distal end of the instrument tube can reach, which makes it difficult for the instrument tube to penetrate into a narrower cavity. Even if the surgical instruments placed in the instrument tube can be inserted into the narrower cavity, they often lack the stable support provided by the instrument tube, resulting in inconvenient operation of the surgical instruments and low surgical efficiency.

[0039] Based on the above situation, in an embodiment of the present application, the insertion part may further include a cylindrical film 300, which is disposed at the distal end of the insertion part. Specifically, the cylindrical film 300 is a structural member made of a non-elastic material. Exemplarily, the cylindrical film 300 may be a structural member made of polyethylene or polypropylene. The distal end of the cylindrical film 300 is connected to the lens holder 100, and the proximal end of the cylindrical film 300 is connected to the instrument tube 200. In the embodiment itself, the instrument tube 200 has a first state and a second state. In the first state, the distal end of the instrument tube 200 is hidden in the receiving hole 130. In the second state, the distal end of the instrument tube 200 extends out and is exposed to the receiving hole 130. The cylindrical film 300 is configured to follow the instrument tube 200 to twist and deform, and then shorten axially, so as to drive the instrument tube 200 to switch from the first state to the second state. It should be noted that in the embodiment of the present application, please refer to Figure 2 The instrument tube 200 in the second state extends outward relative to the lens mount 100 , which means that the instrument tube 200 in the second state has a portion protruding from the distal end wall of the lens mount 100 .

[0040] Based on the above technical solution, in the initial state of the insertion portion of the embodiment of the present application, the cylindrical film 300 is not deformed, and the instrument tube 200 is in the first state. The distal end of the instrument tube 200 is hidden in the accommodating hole 130 of the lens holder 100. At this time, the radial dimension of the distal end of the insertion portion is smaller, which is conducive to probing into the human body cavity. The smaller radial dimension makes it easier for the insertion portion to pass through the narrow or curved cavity of the human body, reducing the friction and pressure on the surrounding tissues of the cavity, helping to reduce the patient's pain and discomfort, and making the entire process of the insertion portion probing into the human body cavity safer and more comfortable.

[0041] After the distal end of the insertion portion reaches the target position, the operator can twist the proximal end of the instrument tube 200 at the operating handle and drive the distal end of the instrument tube 200 to twist. Since the position of the lens mount 100 remains unchanged, the cylindrical film 300 is twisted and deformed following the instrument tube 200. Since the cylindrical film 300 is a structural member made of non-elastic material, the cylindrical film 300 generates wrinkles in this process, and the axial dimension is reduced with the portion connected to the lens mount 100 as a fixed point, thereby pulling and driving the distal end of the instrument tube 200 to protrude out of the lens mount 100. That is, the instrument tube 200 is in the second state at this time, and the radial dimension of the instrument tube 200 extending outward relative to the lens mount 100 is smaller than the radial dimension of the lens mount 100, so that the instrument tube 200 can reach a narrower cavity and provide stable support performance for the surgical operation of the surgical instrument, thereby ensuring the smooth progress of the surgical operation.

[0042] At the same time, in the embodiment of the present application, a cylindrical film 300 is used to connect the lens holder 100 and the distal end of the instrument tube 200, and the connection method is simpler. Moreover, compared with the driving method of applying a thrust from the proximal end of the instrument tube 200 to extend the instrument tube 200 out of the lens holder 100, the method of twisting and deforming the cylindrical film 300 and pulling the instrument tube 200 outward directly acts on the distal end of the instrument tube 200. Therefore, it can more effectively overcome the deformation problem caused by factors such as the material or cavity shape of the instrument tube 200, making the extension method of the distal end of the instrument tube 200 more direct and effective, that is, it can effectively improve the stability of the instrument tube 200 relative to the lens holder 100.

[0043] Please continue to see Figure 1, a first adapter 140 is provided at the proximal end of the lens holder 100. For example, the first adapter 140 is an annular structure. The first adapter 140 and the lens holder 100 are integrally formed, or a portion of the first adapter 140 is embedded in the receiving hole 130 and is glued and fixed to the lens holder 100. The distal end of the instrument tube 200 is movably inserted into the first adapter 140. A second adapter 210 is provided at the distal end of the instrument tube 200. For example, the second adapter 210 is an annular structure. The second adapter 210 can be sleeved on the instrument tube 200 and connected and fixed by glue. In the embodiment of the present application, the first adapter 140 and the second adapter 210 together serve as the installation base of the cylindrical film 300. For example, the two ends of the cylindrical film 300 can be connected and fixed to the first adapter 140 and the second adapter 210 by glue sealing.

[0044] The inventors discovered during the research that if the cylindrical film 300 is in contact with the outer wall of the instrument tube 200 when it is just shrinking and deforming, as the instrument tube 200 continues to be twisted, the cylindrical film 300 will tightly wrap around the outside of the instrument tube 200. In this way, the resistance to axial contraction of the cylindrical film 300 is relatively large, making it difficult for the instrument tube 200 to effectively extend axially.

[0045] Based on the above situation, in the embodiments of this application, please refer to Figure 2 and Figure 3 The diameter of the second adapter 210 is greater than the diameter of the first adapter 140. With this arrangement, when the operator twists the instrument tube 200, there is a large radial deformation space between the cylindrical film 300 and the outer wall of the instrument tube 200, making it difficult for the twisted and deformed cylindrical film 300 to be tightly wound around the outer wall of the instrument tube 200, so as to avoid the resistance to the axial contraction of the cylindrical film 300, so that the cylindrical film 300 can stably drive the instrument tube 200 to extend out of the lens holder 100.

[0046] In a further technical solution, a first gap 600a is provided between the inner wall of the cylindrical film 300 and the outer wall of the first adapter 140. Based on the existence of the first gap 600a, when the operator twists the instrument tube 200, the portion of the cylindrical film 300 distributed on the first adapter 140 will be axially shortened and gradually adhere to the outer wall of the first adapter 140. At this time, this method can also prevent the deformed portion of the cylindrical film 300 from being attached to the instrument tube 200 too early and hindering the instrument tube 200 from extending to the distal end.

[0047] As can be seen from the foregoing, the accommodating hole 130 not only penetrates the distal end wall of the first part 110, but also penetrates the side wall of the first part 110 to form a side opening. In a further technical solution, the lens holder 100 further has an elastic skin (not shown) covering the circumference of the first part 110. For example, the elastic skin can be a structural member made of silicone rubber or polyurethane material. When the instrument tube 200 is in the first state, the elastic skin can cover the distal opening of the accommodating hole 130 to prevent debris such as gravel in the human body from entering the instrument tube 200 through the distal opening and blocking the instrument tube 200. When switching from the first state to the second state, the distal end of the instrument tube 200 can prop up the elastic skin outward and be exposed. At this time, the elastic skin applies elastic constraints to the instrument tube 200 to prevent the instrument tube 200 from bending on the side of the side opening, thereby increasing the stability of the distal end of the instrument tube 200 at the lens holder 100, and making the direction of the distal end of the instrument tube 200 consistent with the direction of the camera module 400. In this way, the action area of ​​the surgical instrument is always within the shooting range of the camera module 400, so that the operator can intuitively see the actual action position of the surgical instrument during the operation, thereby reducing the difficulty and risk of the operation.

[0048] In some embodiments of this application, please continue to refer to Figure 2 In the first state, along the axial direction of the lens holder 100, the portion of the tubular film 300 distributed on the first adapter 140 has a first extension length, and a second gap 600b is provided between the proximal end of the first adapter 140 and the distal end of the second adapter 210, and the first extension length is greater than the second extension length of the second gap 600b in the axial direction of the lens holder 100. Under such a configuration, the main area where the torsional deformation of the instrument tube 200 occurs corresponds to the first adapter 140, thereby preventing it from being tightly wrapped around the outer wall of the instrument tube 200 and limiting the axial movement of the instrument tube 200.

[0049] The embodiment of the present application further discloses an endoscope, which includes an operating handle and an insertion portion, wherein the proximal end of the insertion portion is connected to the operating handle.

[0050] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment 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 reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0051] The above description is only a specific implementation mode 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 covered by the protection scope of the present invention.

Claims

1. An insertion portion, characterized in that: include: A lens mount (100), the lens mount (100) comprising a first portion (110) and a second portion (120), the first portion (110) being connected to a distal end of the second portion (120), the radial dimension of the first portion (110) being smaller than the radial dimension of the second portion (120), and in a first direction, the radial dimension of the first portion (110) gradually increases so as to be connected to the second portion (120), the lens mount (100) having a receiving hole (130) penetrating the first portion (110) and the second portion (120); An instrument tube (200), the distal end of the instrument tube (200) extending into the accommodating hole (130); A cylindrical film (300), wherein the cylindrical film (300) is a structural member made of a non-elastic material, the distal end of the cylindrical film (300) is connected to the lens holder (100), and the proximal end of the cylindrical film (300) is connected to the instrument tube (200); The instrument tube (200) has a first state and a second state. In the first state, the distal end of the instrument tube (200) is hidden in the receiving hole (130) of the second part (120). In the second state, the distal end of the instrument tube (200) extends out of the receiving hole (130). The tubular film (300) is configured to shorten axially when the instrument tube (200) is twisted, so as to drive the instrument tube (200) to switch from the first state to the second state.

2. The insertion portion according to claim 1, characterized in that: A first adapter (140) is provided at the proximal end of the lens holder (100), and a second adapter (210) is provided at the distal end of the instrument tube (200); the first adapter (140) and the second adapter (210) are both annular structures, and two ends of the tubular film (300) are respectively connected to the first adapter (140) and the second adapter (210).

3. The insertion portion according to claim 2, characterized in that: The first adapter (140) and the lens mount (100) are integrally formed, or a portion of the first adapter (140) is embedded in the accommodating hole (130), and the first adapter (140) and the lens mount (100) are glued and fixed; and / or the second adapter (210) and the instrument tube (200) are glued and fixed.

4. The insertion portion according to claim 2, characterized in that: The diameter of the second adapter (210) is greater than the diameter of the first adapter (140).

5. The insertion portion according to claim 2, characterized in that: A first gap (600a) is provided between the inner wall of the cylindrical film (300) and the outer wall of the first adapter (140).

6. The insertion portion according to claim 5, characterized in that The radial dimension of the first portion (110) gradually increases to connect to the second portion (120).

7. The insertion portion according to claim 6, characterized in that The accommodating hole (130) passes through the distal end wall of the first part (110) and the side wall of the first part (110), and the lens mount (100) also has an elastic skin covering the circumference of the first part (110), and the elastic skin is configured to apply an elastic constraint to the distal end of the instrument tube (200) when the instrument tube (200) is in a second state.

8. The insertion portion according to claim 6, characterized in that: In the first state, along the axial direction of the lens mount (100), the portion of the tubular film (300) distributed on the first adapter (140) has a first extension length, and a second gap (600b) is provided between the proximal end of the first adapter (140) and the distal end of the second adapter (210), and the first extension length is greater than a second extension length of the second gap (600b) in the axial direction of the lens mount (100).

9. The insertion portion according to claim 8, characterized in that: In the first state, the distal end portion of the instrument tube (200) is hidden in the second portion (120), and in the second state, the distal end wall of the instrument tube (200) protrudes from the distal end wall of the first portion (110).

10. An endoscope, characterized in that: It comprises the insertion part described in any one of claims 1 to 9.

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