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 and an instrument tube, wherein the lens seat has a storage space and a first opening penetrating through a side wall of the lens seat, wherein the distal end of the instrument tube extends into the storage space, wherein the distal end of the instrument tube has an inclined portion, wherein the inclined portion extends obliquely in the axial direction and radial direction of the lens seat, wherein the instrument tube has a first state and a second state, wherein in the first state, along the radial direction of the lens seat, the lens seat and the distal end opening of the instrument channel at least partially overlap, and in the second state, along the radial direction of the lens seat, the lens seat and the distal end opening of the instrument channel are displaced and separated, and the instrument tube can be switched between the first state and the second state by rotating the instrument tube, wherein the radial dimension of the insertion part in the first state is relatively small, which is beneficial for probing into a human body cavity, and the distal end opening of the instrument tube in the second state has a relatively large radial dimension, which is beneficial for the insertion and operation of 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, the lens mount having a receiving space and a first opening communicating with the receiving space, wherein the first opening passes through a side wall of the lens mount;

[0008] An instrument tube, the instrument tube having an instrument channel, the distal end of the instrument tube extending into the accommodating space, the distal end of the instrument tube having an inclined portion, the inclined portion extending obliquely in the axial direction of the lens mount and in the radial direction of the lens mount;

[0009] The instrument tube has a first state and a second state. In the first state, along the radial direction of the lens mount, the lens mount and the distal opening of the instrument channel at least partially overlap. In the second state, along the radial direction of the lens mount, the lens mount and the distal opening of the instrument channel are misaligned and separated. The instrument tube is rotatably arranged relative to the lens mount to switch between the first state and the second state.

[0010] Further, the lens mount includes a first part and a second part, the first part is connected to the distal end of the second part, and the radial dimension of the first part is smaller than the radial dimension of the second part; the accommodating space is arranged in the second part, and in the first state, the first part blocks at least part of the distal opening of the instrument channel, and in the second state, the first part avoids the distal opening of the instrument channel.

[0011] Furthermore, a relief recess is provided on the first part, and in the second state, along the radial direction of the lens mount, the relief recess avoids the distal end opening of the instrument tube.

[0012] Furthermore, the instrument tube includes an instrument tube body and a transition piece connected to the instrument tube body, the transition piece is tubular in configuration, the transition piece is glued and fixed to the instrument tube body, and the inclined portion is formed on the transition piece.

[0013] Furthermore, the inclined portion includes a first extension section and a second extension section, the second extension section is connected to the distal end of the first extension section, the first extension section is extended along the axial direction of the lens mount and the radial direction of the lens mount, and the extension direction of the second extension section is parallel to the axial direction of the lens mount.

[0014] Furthermore, the instrument tube further comprises a collar connected to the distal end of the instrument tube to maintain the shape of the distal end opening of the instrument channel.

[0015] Furthermore, the inner wall of the second portion is provided with a first limiting surface, and when the instrument tube is switched from the second state to the first state, the inclined portion is limitedly matched with the first limiting surface.

[0016] Furthermore, the second portion is provided with a second limiting surface at the edge of the first opening, and when the instrument tube is switched from the first state to the second state, the inclined portion is limitedly matched with the second limiting surface.

[0017] Furthermore, the insertion part also includes a sealing member, which is a tubular elastic membrane, a distal end of the sealing member is connected and fixed to the lens holder, and a proximal end of the sealing member is connected and fixed to the instrument tube.

[0018] In a second aspect, the present application also provides an endoscope, comprising the aforementioned insertion portion.

[0019] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0020] In the insertion part and the endoscope of the present application, when the instrument tube is in the first state, based on the shielding effect of the lens holder on the distal end opening of the instrument channel, the lens holder and the distal end of the instrument tube have overlapping parts in the radial direction, and at this time, the distal end of the insertion part has a smaller radial dimension, and the smaller 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 tissues around the cavity, which helps to reduce the pain and discomfort of the patient, making the process of the entire insertion part probing into the human cavity safer and more comfortable; and after the distal end of the insertion part reaches the target position, the operator can rotate the proximal end of the instrument tube at the operating handle, and drive the distal end of the instrument tube to twist, so that the instrument tube is switched from the first state to the second state. In the second state, the inclined portion of the instrument tube extends outwardly through the first opening, so that the entire part of the distal end opening of the instrument channel is exposed, thereby ensuring the radial dimension of the instrument channel, not only reducing the size requirements for the surgical instrument inserted therein, but also facilitating the operator to perform surgical operations. When performing negative pressure suction operations, the larger radial dimension of the instrument channel is also difficult to be blocked, which can effectively control the operation time and reduce the surgical risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is one of the structural schematic diagrams of the insertion part of the embodiment of the present application;

[0023] Figure 2 This is the second structural schematic diagram of the insertion part of the embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of a lens mount according to an embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of an instrument tube according to an embodiment of the present application;

[0026] Figure 5 This is the third structural schematic diagram of the insertion part of the embodiment of the present application.

[0027] In the figure:

[0028] 100, lens mount; 110, first part; 111, avoidance recess; 120, second part; 121, accommodating space; 122, first limiting surface; 123, second limiting surface; 200, instrument tube; 210, instrument tube body; 220, adapter; 221, first extension section; 222, second extension section; 223, mounting section; 230, collar; 240, instrument channel; 300, seal; 400, camera module; 500, light source. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] The present application embodiment discloses an insertion portion and an endoscope. Figures 1 to 5 , 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.

[0032] See also Figure 1 and Figure 2 The 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 accommodating space 121 and a first opening connected to the accommodating space 121, the first opening passes through the side wall of the lens mount 100, the distal end of the instrument tube 200 extends into the accommodating space 121, and the distal end of the instrument tube 200 is located at the position where the first opening is opened in the lens mount 100, the instrument tube 200 has an instrument channel 240, and the instrument channel 240 is used to insert surgical instruments. When the surgical instruments are inserted into the instrument tube 200, the surgical instruments can protrude outward through the distal end opening of the instrument channel 240 and the first opening.

[0033] In the embodiment of the present application, the distal end of the instrument tube 200 is formed with an inclined portion, which extends in the axial direction of the lens holder 100 and in the radial direction of the lens holder 100, so that the entire inclined portion is inclined relative to the axial direction of the lens holder 100. In the embodiment of the present application, the instrument tube 200 has a first state and a second state. In the first state, see Figure 1 , along the longitudinal direction of the lens mount 100, the lens mount 100 and the distal opening of the instrument channel 240 at least partially overlap, that is, the lens mount 100 blocks the distal opening of the instrument channel 240. It should be noted that the lens mount 100 can block the distal opening of the instrument channel 240 by partially blocking the distal opening or completely blocking the distal opening. The embodiment of the present application does not make specific restrictions on this. In the second state, please refer to Figure 2 Along the radial direction of the lens mount 100, the lens mount 100 is misaligned and separated from the distal opening of the instrument channel 240, that is, the distal opening of the instrument channel 240 is in a completely exposed state at this time. When the surgical instrument is extended from the distal opening, the lens mount 100 will not block the surgical instrument. The proximal end of the instrument tube 200 extends to the operating handle of the endoscope. The operator can rotate the proximal end of the instrument tube 200 to realize the rotation of the instrument tube 200 relative to the lens mount 100, thereby realizing the switching of the instrument tube 200 between the first state and the second state.

[0034] Based on the above scheme, when the instrument tube 200 is in the first state, based on the shielding effect of the lens holder 100 on the distal end opening of the instrument channel 240, the lens holder 100 and the distal end of the instrument tube 200 have overlapping parts in the radial direction. At this time, the distal end of the insertion part has a smaller radial dimension. The smaller 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 tissues around the cavity, which helps to reduce the pain and discomfort of the patient, making the entire process of the insertion part probing into the human cavity safer and more comfortable; after the distal end of the insertion part reaches the target position, the operator can rotate the instrument tube to 200 is at the proximal end of the operating handle, and drives the distal end of the instrument tube 200 to twist, so that the instrument tube 200 switches from the first state to the second state. In the second state, the inclined portion of the instrument tube 200 extends outward through the first opening, so that the entire portion of the distal opening of the instrument channel 240 is in an exposed state, thereby ensuring the radial size of the instrument channel 240, which not only reduces the size requirements for the surgical instruments inserted therein, but also facilitates the operator to perform surgical operations. During negative pressure suction operations, the larger radial size of the instrument channel 240 is less likely to be blocked, which can effectively control the operation time and reduce the surgical risk.

[0035] In the examples of this application, please continue to refer to Figure 1The lens mount 100 includes a first part 110 and a second part 120, wherein the first part 110 is connected to the distal end of the second part 120. Exemplarily, the first part 110 and the second part 120 can be integrally formed by injection molding, and the first part 110 can provide an installation basis for the camera module 400 and the light source 500 of the insertion part, that is, the camera module 400 and the light source 500 are arranged on the lens mount 100 to constitute the front end component of the insertion part.

[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, so that it has good obstacle avoidance performance when inserted into the human body cavity, so as to improve the smoothness of the insertion of the insertion part into the human body cavity.

[0037] In the examples of this application, please continue to refer to Figure 1 and Figure 2 The accommodating space 121 is provided in the second part 120. In the first state, the proximal end surface of the first part 110 can play an axial limiting role on the distal end of the instrument tube 200, that is, the first part 110 can block the distal end opening of the instrument channel 240, and the camera module 400 and the distal end of the instrument tube 200 are staggered in the axial direction of the lens holder 100. In the second state, along the radial direction of the lens holder 100, the distal end of the instrument tube 200 is rotated and extended, and the first part 110 avoids the distal end opening of the instrument channel 240, so that the distal end opening of the instrument channel 240 has a larger exposed size, which reduces the size requirements for the surgical instruments placed therein and also facilitates the operator to perform surgical operations.

[0038] In a further technical solution, an avoidance recess 111 is further provided on the first part 110. In the second state, along the radial direction of the lens holder 100, the avoidance recess 111 avoids the distal opening of the instrument tube 200. By setting the avoidance recess 111, the radial dimension of the distal component of the insertion part can be further reduced, thereby making the structure of the distal end of the insertion part more compact, reducing unnecessary space occupation, and facilitating the thinning of the insertion part of the endoscope.

[0039] The inventors found during the research that the instrument tube 200 usually has good flexibility and its radial dimension is usually relatively small. Therefore, when the distal end of the instrument tube 200 is integrally formed with a curved portion, there are difficulties in forming and manufacturing. Based on this situation, please refer to Figure 3 and Figure 4The instrument tube 200 of the embodiment of the present application includes an instrument tube body 210 and an adapter 220 connected to the instrument tube body 210. The adapter 220 is a tubular configuration. The adapter 220 is connected to the front end of the instrument tube body 210. Exemplarily, the adapter 220 can be connected to the front end of the instrument tube body 210 by gluing. The aforementioned inclined portion is formed on the adapter 220. Exemplarily, the inclined portion can be a structural member made of a plastic material, or a structural member made of a polymer material such as polyvinyl chloride or polyurethane. By setting the instrument tube 200 as a split structure, the difficulty of manufacturing the instrument tube 200 can be significantly reduced, and the manufacturing efficiency of the entire insertion portion can be improved.

[0040] For further technical solutions, please continue to refer to Figure 2 , Figure 3 and Figure 4 The inclined portion includes a first extension section 221 and a second extension section 222 connected to the distal end of the first extension section 221. The first extension section 221 extends axially along the lens holder 100 and also extends radially outwardly along the lens holder 100, so that when the instrument tube 200 is in the second state, the inclined portion can protrude outward through the first opening, and the second extension section 222 extends axially along the lens holder 100. In the embodiment of the present application, in order to facilitate the distinction and understanding of the first extension section 221 and the second extension section 222, please refer to Figure 2 and Figure 4 ,by Figure 2 or Figure 4 The middle dotted line serves as the boundary between the first extension section 221 and the second extension section 222. That is to say, the second extension section 222 at the farthest end of the inclined portion extends along the axial direction of the lens holder 100. In this way, even if the inclined portion tilts radially outward to protrude from the first opening, during the surgical operation, the direction of the far end of the instrument tube 200 is consistent with the direction of the camera module 400, and 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, reducing the difficulty and risk of the operation.

[0041] In the examples of this application, please continue to refer to Figure 4 The adapter 220 may further include a mounting section 223, and the adapter 220 may be sleeved on the distal end of the instrument tube body 210 through the mounting section 223. Based on the extension of the mounting section 223 in the axial direction of the instrument tube body 210, the adapter 220 and the instrument tube body 210 may have a larger bonding contact area, thereby ensuring the stability of the connection between the adapter 220 and the instrument tube body 210.

[0042] In a further technical solution, when the adapter 220 is a structural member made of a polymer material such as polyvinyl chloride or polyurethane, the instrument tube 200 may further include a collar 230, which is connected to the distal end of the instrument tube 200. For example, the collar 230 may be bonded and sleeved on the distal end of the second extension section 222 by gluing. The collar 230 may support and shape the distal opening of the instrument channel 240, and may effectively prevent the distal end of the instrument tube 200 from collapsing and occluding when it is obstructed or compressed, thereby ensuring the normal progress of the surgical operation and avoiding the occurrence of unexpected situations.

[0043] In the examples of this application, see Figure 3 The inner wall of the second portion 120 is provided with a first limiting surface 122. When the rotating instrument tube 200 switches from the second state to the first state, since the inclined portion is offset relative to the axial direction of the instrument tube body 210, the inclined portion can cooperate with the first limiting surface 122 to enable the instrument tube 200 to stably switch to the first state, thereby preventing the instrument tube 200 from excessively rotating.

[0044] Likewise, please continue to see Figure 3 The second portion 120 is provided with a second limiting surface 123 at the edge of the first opening. When the rotating instrument tube 200 is switched from the first state to the second state, the inclined portion axially offset relative to the instrument tube body 210 cooperates with the second limiting surface 123 to prevent the instrument tube 200 from excessive rotation.

[0045] In the above scheme, through the setting of the first limit surface 122 and the second limit surface 123, when the operator rotates the proximal end of the instrument tube 200, when the operator rotates the instrument tube 200 forward or reversely until it encounters a large rotational resistance, it means that the instrument tube 200 is now in the exact first state or second state, which can prevent the instrument tube 200 from being in the middle position between the first state and the second state.

[0046] In a further technical solution, the insertion part may further include a seal 300, which is a tubular elastic membrane. The distal end of the seal 300 is connected and fixed to the lens holder 100, and the proximal end of the seal 300 is connected and fixed to the instrument tube 200. Exemplarily, both the distal and proximal ends of the seal 300 may be connected and fixed to the lens holder 100 and the instrument tube 200 by gluing. Through the provision of the seal 300, tissue fluid in the human body can be effectively prevented from escaping outward along the instrument tube 200.

[0047] 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.

[0048] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are 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 "comprise 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 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 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.

[0049] 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 receiving space (121) and a first opening connected to the receiving space (121), the first opening penetrating a side wall of the lens mount (100); An instrument tube (200), the instrument tube (200) having an instrument channel (240), the distal end of the instrument tube (200) extending into the accommodating space (121), the distal end of the instrument tube (200) having an inclined portion, the inclined portion extending obliquely in the axial direction of the lens mount (100) and in the radial direction of the lens mount (100); The instrument tube (200) has a first state and a second state. In the first state, along the radial direction of the lens mount (100), the distal openings of the lens mount (100) and the instrument channel (240) at least partially overlap. In the second state, along the radial direction of the lens mount (100), the distal openings of the lens mount (100) and the instrument channel (240) are displaced and separated. The inclined portion of the instrument tube (200) extends outwardly through the first opening. The instrument tube (200) is rotatably arranged relative to the lens mount (100) to switch between the first state and the second state.

2. The insertion portion according to claim 1, characterized in that: The lens mount (100) comprises a first part (110) and a second part (120), the first part (110) being connected to a distal end of the second part (120), and a radial dimension of the first part (110) being smaller than a radial dimension of the second part (120); The accommodating space (121) is provided in the second portion (120); in the first state, the first portion (110) blocks at least a portion of a distal opening of the instrument channel (240); in the second state, the first portion (110) avoids the distal opening of the instrument channel (240).

3. The insertion portion according to claim 2, characterized in that: The first part (110) is also provided with an avoidance recess (111), and in the second state, along the radial direction of the lens mount (100), the avoidance recess (111) avoids the distal end opening of the instrument tube (200).

4. The insertion portion according to claim 3, characterized in that: The instrument tube (200) comprises an instrument tube body (210) and an adapter (220) connected to the instrument tube body (210); the adapter (220) is tubular in configuration; the adapter (220) is glued and fixed to the instrument tube body (210); and the inclined portion is formed on the adapter (220).

5. The insertion portion according to claim 4, characterized in that: The inclined portion comprises a first extension section (221) and a second extension section (222); the second extension section (222) is connected to the distal end of the first extension section (221); the first extension section (221) is extended along the axial direction of the lens mount (100) and the radial direction of the lens mount (100); and the extension direction of the second extension section (222) is parallel to the axial direction of the lens mount (100).

6. The insertion portion according to claim 5, characterized in that The instrument tube (200) further comprises a collar (230) connected to the distal end of the instrument tube (200) to maintain the shape of the distal end opening of the instrument channel (240).

7. The insertion portion according to any one of claims 2 to 6, characterized in that: The inner wall of the second part (120) is provided with a first limiting surface (122), and when the instrument tube (200) switches from the second state to the first state, the inclined portion and the first limiting surface (122) are limitedly matched.

8. The insertion portion according to claim 7, characterized in that: The second portion (120) is provided with a second limiting surface (123) at the edge of the first opening, and when the instrument tube (200) switches from the first state to the second state, the inclined portion and the second limiting surface (123) are limitedly matched.

9. The insertion portion according to claim 1, characterized in that: It also comprises a sealing member (300), wherein the sealing member (300) is a tubular elastic membrane, the distal end of the sealing member (300) is connected and fixed to the lens holder (100), and the proximal end of the sealing member (300) is connected and fixed to the instrument tube (200).

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

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