Endoscope instrument sealing assembly and endoscope

Abstract

The utility model relates to the field of endoscopes, and specifically to an endoscope instrument sealing assembly and an endoscope. An endoscope instrument sealing assembly comprises: a mounting base, a working channel is provided on the mounting base, and the distal end of the working channel is connected to a working channel tube; and a sealing member, which is arranged on the working channel; the sealing member comprises an instrument sealing part, an instrument channel hole is provided on the instrument sealing part, the instrument channel hole is for the instrument to pass through and forms a seal with the outer peripheral surface of the instrument, and an escape space is provided on the distal side of the instrument sealing part, and the escape space provides a movable space for the deflection of the instrument sealing part. The utility model mainly solves the technical problem that the endoscope is prone to failure of the anti-leakage structure when the instrument inserted in the endoscope deflects.

Description

Technical Field

[0001] The utility model relates to the field of endoscopes, in particular to an endoscope instrument sealing component and an endoscope. Background Art

[0002] With the rapid development of science and medical technology, the use of endoscopes for minimally invasive or non-invasive medical examinations and treatments has become widely popular. The insertion tube of the endoscope can pass through the natural cavity of the human body or the minimally invasive surgical channel to reach a specific location.

[0003] Since natural cavities or organs are usually in a collapsed state, such as the female uterus, bladder, ureter, etc., an endoscope is required to provide an injection channel through which the perfusion fluid is injected to expand the collapsed organ or natural cavity. After the organ or cavity is expanded, the camera module and lighting module of the endoscope can observe the real-time image of the human tissue more clearly to check whether there is any disease. If a disease is found, the instrument can be inserted through the working channel in the insertion tube of the endoscope to take a biopsy or treatment.

[0004] The smaller the outer diameter of the insertion part of the endoscope, the less pain the patient will suffer, so endoscopes usually use the working channel as an injection or return channel at the same time. Especially when used in gynecological hysteroscopes, in order to quickly inflate the uterus, it is usually necessary to provide a pressure of 80-100 mmHg to inject the perfusion fluid into the uterine cavity through the distal end of the working channel. Under this perfusion fluid pressure, the leakage-proof performance of the proximal end of the working channel becomes a design difficulty for the endoscope. Especially after the instrument enters the endoscope and the instrument deflects to a certain angle, the seal in the endoscope that is used to abut against the outer peripheral surface of the instrument to achieve sealing is prone to deformation, resulting in leakage of the perfusion fluid. How to maintain the effectiveness and reliability of the leakage-proof structure when the instrument deflects is a difficult problem that needs to be solved at present. Utility Model Content

[0005] The utility model mainly solves the technical problem that the anti-leakage structure of the endoscope is prone to failure when an instrument inserted in the endoscope is deflected.

[0006] In a first aspect, the utility model provides an instrument sealing assembly for an endoscope.

[0007] An endoscope instrument sealing assembly, comprising:

[0008] A mounting base, wherein a working channel is provided on the mounting base, and a connecting structure for connecting a working channel tube is provided at a distal end of the working channel;

[0009] and a sealing member, wherein the sealing member is arranged on the working channel; the sealing member comprises an instrument sealing portion, wherein the instrument sealing portion is provided with an instrument channel hole, wherein the instrument channel hole is used for the instrument to pass through and forms a seal with the outer peripheral surface of the instrument, and an escape space is provided on the distal side of the instrument sealing portion, wherein the escape space provides a movable space for the deflection of the instrument sealing portion.

[0010] Optionally, the seal includes a base connecting part, a middle part and an instrument sealing part, and the base connecting part, the middle part and the instrument sealing part are arranged in sequence from the outside to the inside along the radial direction of the working channel. The base connecting part is fixed on the mounting base, and a thinning area is provided on the seal. The thickness of the thinning area is smaller than that of the instrument sealing part. The material of the seal is elastic material, and the middle part is formed by the thinning area.

[0011] Optionally, the middle part is annular, the radial outer side of the middle part is connected to the base connecting part, the radial inner side of the middle part is connected to the instrument sealing part, the deformation resistance of the middle part is weaker than that of the instrument sealing part, and a groove is provided on the surface of the distal side and / or the surface of the proximal side of the seal, and the groove forms the thinned area on the seal.

[0012] Optionally, the mounting base includes a connecting seat and a pressure cover, the working channel tube is connected to the connecting seat, the pressure cover presses the base connecting part toward the connecting seat along the axial direction of the working channel, and the working channel includes a first channel arranged on the connecting seat and a second channel arranged on the pressure cover; the pressure cover is provided with an annular positioning boss at one end close to the seal, the proximal side surface of the seal is provided with the groove, the positioning boss is embedded in the groove on the distal end face of the seal and is radially positioned with the seal.

[0013] Optionally, the outer contour of the sealing portion of the instrument is cylindrical.

[0014] Optionally, the distal end of the instrument sealing portion protrudes beyond the distal end surface of the middle portion, and / or the proximal end of the instrument sealing portion protrudes beyond the proximal end surface of the middle portion.

[0015] Optionally, a one-way valve is included, which is arranged on the distal side of the sealing member, wherein the one-way valve has a cavity inside, the distal end of the instrument sealing portion extends into the cavity, and there is a radial gap between the cavity wall and the instrument sealing portion.

[0016] Optionally, the axial dimension of the instrument channel hole is 2 mm to 5 mm.

[0017] Optionally, both the proximal and distal ends of the instrument channel hole are provided with chamfers, and the chamfers are used to guide the instrument to enter and exit the instrument channel hole.

[0018] In a second aspect, the utility model provides an endoscope.

[0019] An endoscope, comprising:

[0020] an insertion tube, the insertion tube being used to be inserted into a target location;

[0021] a working channel tube, the working channel tube being disposed within the insertion tube;

[0022] A handle, the handle comprising a handle shell and an instrument sealing assembly, the instrument sealing assembly is arranged in the handle shell, the instrument sealing assembly is the instrument sealing assembly described in any one of the above items, and the proximal end of the working channel tube is connected to the working channel.

[0023] Beneficial effects of the utility model:

[0024] The instrument sealing assembly in the present application includes a seal, which includes an instrument sealing part. An avoidance space is provided on the distal side of the instrument sealing part, and the avoidance space provides a movable space for the swing of the instrument sealing part. Therefore, when the instrument swings, that is, when an angle appears with the axis of the working channel, the instrument sealing part can follow the swing of the instrument, thereby helping to avoid the instrument squeezing the instrument channel hole on the instrument sealing part and destroying the seal between the instrument and the instrument sealing part, which is beneficial to avoid failure of the anti-leakage structure of the endoscope.

[0025] Furthermore, the middle part of the seal is connected between the base connecting part and the instrument sealing part. After the instrument passes through the instrument channel hole on the instrument sealing part and forms a seal with the instrument channel hole, the seal can block the working channel to prevent the perfusion fluid from leaking from the working channel, thereby forming a liquid-leakage-proof structure; at the same time, since the deformation resistance of the middle part is weaker than that of the instrument sealing part, the instrument sealing part can more freely follow the deflection of the instrument, which is beneficial to reduce or avoid the damage of its own deformation to the seal between the instrument and the instrument sealing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of an instrument sealing assembly of an endoscope in the utility model;

[0027] Figure 2 yes Figure 1 AA section view;

[0028] Figure 3 yes Figure 1 The structural breakdown diagram of

[0029] Figure 4 is a perspective view of a one-way valve of an instrument sealing assembly;

[0030] Figure 5 yes Figure 4 The main view;

[0031] Figure 6 yes Figure 5 BB cross-sectional view;

[0032] Figure 7 yes Figure 5 Left view of

[0033] Figure 8 is a schematic diagram of the structure of a seal in an instrument sealing assembly;

[0034] Fig. 9 yes Figure 8 Right view of;

[0035] Fig.10 is a schematic structural diagram of a sealing member in another embodiment of an instrument sealing assembly of an endoscope;

[0036] Fig.11 It is a schematic structural diagram of a seal in another embodiment of an instrument sealing assembly of an endoscope.

[0037] List of feature names corresponding to the reference numerals in the figure:

[0038] 100. Installing a substrate;

[0039] 110, connecting seat; 111, anti-fouling rib; 112, clamping protrusion; 113, accommodating cavity; 114, stage;

[0040] 120, gland; 121, limit groove; 122, card slot; 123, positioning boss;

[0041] 130, working channel; 131, first channel; 132, second channel; 133, plug-in hole section;

[0042] 200, one-way valve; 210, main body; 211, inclined surface; 212, slit; 220, flange; 221, annular boss; 230, avoidance space;

[0043] 300, sealing member; 310, base connecting portion; 320, instrument sealing portion; 321, instrument channel hole; 322, chamfer; 330, middle portion; 340, first groove; 350, second groove;

[0044] 400. Working channel tube. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments use associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0046] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0047] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0048] The "proximal end" and "distal end" that appear in this article are conventional terms in the medical field. For a device to be operated, the proximal end is the end close to the device operator, and the distal end is the end away from the device operator. Figure 1 The proximal and distal ends are indicated by arrows.

[0049] In the embodiment of the utility model, the avoidance space on the distal side of the instrument sealing part can make the instrument sealing part swing more freely when the instrument swings, so as to avoid the instrument squeezing the instrument channel hole and causing the seal to deform, thereby destroying the seal between the instrument and the instrument channel hole. In addition, the seal 300 is provided with a base connecting part 310 connected to the mounting base 100, and an intermediate part 330 connected between the base connecting part 310 and the instrument sealing part 320. The intermediate part 330 can deform more easily than the instrument sealing part 320, which is conducive to better avoiding the lateral squeezing of the instrument sealing part 320 when the instrument deflects, causing the instrument sealing part 320 to deform and cause the anti-leakage structure to fail.

[0050] Embodiment of the instrument sealing assembly of the endoscope in the utility model:

[0051] Please refer to Figure 1 The instrument sealing assembly of the endoscope includes a mounting base 100, a one-way valve 200 and a sealing member 300, wherein the mounting base 100 includes a connecting seat 110 and a pressure cover 120, and the one-way valve 200 and the sealing member 300 are fixed on the mounting base 100 by the pressure cover 120.

[0052] A working channel 130 is provided on the mounting base 100, and instruments such as biopsy forceps, scissors, foreign body forceps, etc. that are compatible with the endoscope can pass through the working channel 130 and enter the working channel tube 400 on the endoscope, and then extend from the distal end of the insertion tube of the endoscope through the working channel tube 400 to perform related operations. In addition, the portion of the working channel 130 located on the distal side of the seal can also be used for the passage of perfusion liquid. When in use, according to different operating steps or usage scenarios, the working channel 130 may only be used for the passage of instruments, or may only be used for the passage of perfusion liquid, or may be used for the passage of perfusion liquid while allowing instruments to pass. Corresponding to the connecting seat 110 and the pressure cover 120, the working channel 130 includes a first channel 131 arranged on the connecting seat 110 and a second channel 132 arranged on the pressure cover 120.

[0053] The connection base 110 can be connected to the working channel tube 400, which is arranged in the insertion tube of the endoscope to provide an insertion channel for the instrument and / or an infusion or outflow channel for the infusion fluid. The distal end of the working channel 130 is provided with a connection structure for connecting the working channel tube 400, please refer to Figure 2 In one embodiment, a plug hole section 133 is provided at the distal end of the working channel 130, and the connection structure is a plug structure formed by the plug hole section 133. The inner diameter of the plug hole section 133 is larger than the inner diameter of the adjacent part, and the inner wall of the working channel tube 400 is coplanar with the inner wall of the smaller diameter part of the plug hole section 133, which is conducive to the smooth entry and exit of the instrument. In order to ensure the sealing performance, a seal can be formed between the working channel tube 400 and the mounting base 100 by bonding, setting a sealing ring, etc. In some other embodiments, the connection structure at the distal end of the working channel 130 for connecting the working channel tube 400 can also be other structural forms, such as a flange structure.

[0054] The gland 120 is detachably assembled on the connection seat 110, and the connection form is not limited. In one embodiment, the outer circumferential surface of the connection seat 110 is provided with an anti-fool rib 111 and a clamping protrusion 112, and the gland 120 is provided with a limiting groove 121 and a clamping groove 122. The anti-fool rib 111 and the limiting groove 121 extend along the axial direction of the working channel 130 to achieve the circumferential positioning of the gland 120 and the connection seat 110, and the clamping protrusion 112 and the clamping groove 122 can be connected in a buckle form to fix the gland 120 to the connection seat 110. By providing the limiting groove 121 and the clamping groove 122, it is convenient to quickly and accurately install the gland 120.

[0055] In order to realize the installation of the one-way valve 200 and the sealing member 300, the proximal end of the connection seat 110 is provided with a receiving cavity 113 and a stage 114. The receiving cavity 113 can accommodate the main body 210 of the one-way valve 200, and the stage 114 forms a supporting surface facing the proximal end, which can support the flange portion 220 of the proximal end of the one-way valve 200. At the same time, the radial outer portion of the sealing member 300 can be supported on the flange portion 220 of the one-way valve 200. After the gland 120 is installed on the connection seat 110, the sealing member 300 and the one-way valve 200 can be pressed and fixed on the connection seat 110 by the gland 120.

[0056] In one embodiment, the one-way valve 200 is a duckbill one-way valve, which can be made of elastic materials such as silicone, natural or synthetic rubber, polyurethane, acrylate, etc., and its structure is as follows: Figures 3 to 6 As shown, the whole is a hollow structure with a cavity inside, and an opening is provided at the proximal end of the cavity. The two opposite sides of the distal end of the main body 210 are inclined surfaces 211, forming a flat shape, and a "I"-shaped slit 212 is provided on the distal end surface of the one-way valve 200. When no instrument is inserted into the endoscope, the perfusion liquid enters the proximal end of the working channel tube 400 through the injection channel of the endoscope (the injection channel can be formed by the cavity between the working channel tube and the insertion tube) under the action of external pressure, and then flows from the proximal opening of the working channel tube 400 to the accommodating cavity 113 on the connecting seat 110. The accommodating cavity 113 is filled with perfusion liquid, and the perfusion liquid compresses the flat part of the one-way valve 200. The slit 212 is tightly closed, which can prevent the perfusion liquid from flowing into the second channel 132 on the gland 120, and realize the waterproof sealing function when no instrument is inserted. Under the same perfusion liquid pressure, in order to make the slit 212 of the one-way valve 200 close more tightly, the inclination angle α of the inclined surface 211 on the one-way valve 200 may be less than 45°.

[0057] In order to prevent the perfusion liquid from leaking from the mating end faces of the connecting seat 110 and the one-way valve 200, an annular boss 221 is designed on the distal end face of the flange portion 220. The annular boss 221 can be pressed and flattened by the sealing member 300 and the gland 120 to achieve sealing of the end face here and prevent the perfusion liquid from leaking.

[0058] Those skilled in the art will appreciate that in some other embodiments, the one-way valve 200 may also be replaced with other structures. For example, the main body 210 of the one-way valve 200 may be a hemispherical membrane, and a cross slit may be provided on the hemispherical membrane, which can also satisfy the function of allowing the normal passage of the instrument and the function of blocking the reverse flow of the perfusion fluid.

[0059] The sealing member 300 is disposed on the working channel 130. In a specific embodiment, as Figure 2 and Figure 3As shown, the seal 300 can be disposed between the connection seat 110 and the gland 120, and is located at the proximal side of the one-way valve 200. In some other embodiments, the seal 300 can also be disposed at other positions of the working channel 130, for example, at the proximal opening of the working channel 130. The structural design of the seal 300 in the present application can prevent the seal between the seal 300 and the instrument from failing when the instrument passing through the seal 300 deflects.

[0060] Specifically, the sealing member 300 can be integrally formed of an elastic material such as silicone, natural or synthetic rubber, polyurethane, acrylate, etc. Figure 2 , Figure 3 , Figure 8 and Fig. 9 The sealing member 300 is a rotating body structure, and may include a base connecting portion 310, an instrument sealing portion 320, and an intermediate portion 330. The base connecting portion 310, the intermediate portion 330, and the instrument sealing portion 320 are sequentially arranged from outside to inside along the radial direction of the working channel 130. It should be noted that the base connecting portion 310, the intermediate portion 330, and the instrument sealing portion 320 may be aligned along the axial direction of the working channel 130, or may have a staggered amount along the axial direction of the working channel 130.

[0061] The base connection portion 310 of the seal 300 is located radially outside the seal 300, and can be fixed on the mounting base 100, for example, by being pressed and fixed by the gland 120. In some other embodiments, the base connection portion 310 can also be fixed to the mounting base 100 in other ways, such as being sleeved on the outer peripheral surface of the mounting base 100 and fixed, or being fixed to the proximal end surface of the mounting base 100 by end surface bonding.

[0062] The instrument sealing portion 320 is provided with an instrument channel hole 321, which is used for the instrument to pass through and forms a seal with the outer peripheral surface of the instrument. The hole wall shape of the instrument channel hole 321 can be cylindrical, which can be close to the outer peripheral surface of the instrument. In one embodiment, the proximal and distal ends of the instrument channel hole 321 are both provided with chamfers 322, which are used to guide the instrument in and out of the instrument channel hole 321, facilitate the smooth entry and exit of the instrument, help avoid jamming, and help reduce the driving of the seal 300 when the instrument moves, so as to better avoid the deformation of the seal 300 and the leakage of the perfusion liquid.

[0063] The middle part 330 is annular, the radial outer side of the middle part 330 is connected to the base connecting part 310, and the radial inner side of the middle part 330 is connected to the instrument sealing part 320. The deformation resistance of the middle part 330 is weaker than that of the instrument sealing part 320. In one embodiment, a thinning area is provided on the seal 300, and the thickness of the thinning area is less than that of the adjacent part. The material of the seal 300 is an elastic material, and the middle part 330 is formed by the thinning area. The side of any side of the thinning area can be a straight side perpendicular to the axis of the working channel 130, or it can be an inclined side arranged obliquely relative to the axis of the working channel 130. A first groove 340 is provided on the surface of the distal end side of the seal 300, and the first groove 340 is an annular groove. The annular groove can be a full circle annular groove or a local groove, such as two or more annular grooves arranged at intervals along the circumference of the seal 300, so that a thinning area is formed on the seal 300. In some other embodiments, the change of deformation resistance can also be achieved by material difference.

[0064] In some other embodiments, a second groove 350 may be provided on the surface of the proximal end of the seal 300, and the second groove 350 may be an annular groove, such as Fig.11 The second groove 350 may also be a circular groove, such as Figure 8 and Fig.10 Please refer to Figure 2 and Figure 3 , a circular groove is arranged on the proximal side surface of the seal 300, and a ring-shaped positioning boss 123 is arranged on one end of the gland 120 close to the seal 300, and the positioning boss 123 is embedded in the second groove 350 on the distal end surface of the seal 300 and positioned radially with the seal 300, so that the positioning of the seal 300 can be easily achieved, and the rapid assembly of the instrument sealing assembly can be facilitated. The thickness of the base connecting portion 310 can also be the same as the thickness of the middle portion 330, and can also be less than the thickness of the middle portion 330, as long as the seal 300 can be fixed to the mounting base 100. Of course, those skilled in the art can understand that the seal 300 is a sealing structure, and the base connecting portion 310 should also form a seal with the mounting base 100. When the instrument is not inserted, the space on both sides of the axial direction of the seal 300 can only be connected through the instrument channel hole 321, that is, the seal 300 can play an isolation role.

[0065] In other embodiments, the first groove 340 may be provided on the surface of both the distal end side and the proximal end side of the seal 300 , and the first groove 340 may be used to weaken the anti-deformation capability of the middle portion 330 .

[0066] The distal end of the instrument sealing portion 320 is provided with an escape space 230, and the escape space 230 can provide a movable space for the swing of the instrument sealing portion 320. Figure 2 The distal end of the instrument sealing part 320 extends into the cavity of the one-way valve 200, and the cavity forms an escape space 230. There is a radial interval between the cavity wall and the instrument sealing part 320, which facilitates the movement of the instrument sealing part 320 under the drive of the instrument.

[0067] When the instrument inserted into the seal 300 is deflected to a certain angle during operation, the middle part 330 can be deformed because the deformation resistance of the middle part 330 is weaker than that of the instrument sealing part 320, while the instrument sealing part 320 of the seal 300 can swing with the instrument and still maintain close contact with the outer peripheral surface of the instrument, preventing the pressurized liquid in the working channel 130 from spraying out from between the instrument and the seal 300, avoiding splashing onto the hands or body of the doctor or operator to cause infection, which is beneficial to protecting the safety of the doctor or operator.

[0068] In one embodiment, the outer contour of the instrument sealing portion 320 is cylindrical, which is more stable and can better avoid deformation due to the action of the instrument. In addition, in order to better ensure the seal between the instrument and the sealing member 300, in a specific embodiment, the axial dimension of the instrument channel hole 321 is 2 mm to 5 mm, which can form a longer sealing matching length with the instrument.

[0069] In order to achieve the above-mentioned sealing fitting length, in a specific embodiment, please refer to Figure 8 and Fig.10 , the distal end of the instrument sealing portion 320 protrudes from the distal end surface of the middle portion 330. In another embodiment, please refer to Fig.11 The distal end of the instrument sealing portion 320 protrudes from the distal end surface of the middle portion 330 , and the proximal end of the instrument sealing portion 320 protrudes from the proximal end surface of the middle portion 330 .

[0070] Above Fig.10 The structure of the seal shown is similar to Figure 8 In comparison, the basic thickness of the seal 300 is thinner, so the groove 340 on the distal end side of the seal 300 can be omitted. Fig.10 In the embodiment, the outer peripheral surface of the instrument sealing portion 320 of the seal 300 has a taper, forming a frustum structure whose diameter gradually decreases from the proximal end to the distal end, which facilitates the movement of the instrument sealing portion 320 and enables the proximal end of the instrument sealing portion 320 to have a higher deformation resistance.

[0071] When an instrument is inserted into the endoscope, the instrument can be inserted through the second channel 132 on the gland 120, and then pass through the instrument channel hole 321 on the seal 300, the slit 212 of the one-way valve 200, and the first channel 131 on the connector 110 to enter the working channel tube 400. At this time, the slit 212 on the one-way valve 200 opens, and the perfusion liquid enters the one-way valve 200. Since the instrument channel hole 321 of the seal 300 is tightly interference-fitted with the instrument, the perfusion liquid can no longer continue to flow to the proximal end of the working channel 130, thereby achieving a waterproof sealing function when the instrument is inserted. Since the seal 300 is provided with an intermediate portion 330, when the instrument swings, the intermediate portion 330 can more easily undergo elastic deformation relative to the instrument sealing portion 320, so that the instrument sealing portion 320 follows the swing of the instrument and its own deformation is small, and it can still maintain a seal with the instrument, thereby achieving a sealing and waterproof function when the instrument swings.

[0072] Embodiments of the endoscope in the utility model:

[0073] The endoscope includes an insertion tube and a handle. The insertion tube is used to be inserted into a target position. The insertion tube is led out from the distal end of the handle, and the handle can drive the insertion tube to move. The endoscope also includes a working channel tube 400, which is arranged in the insertion tube and is used to provide an insertion channel for the instrument. Those skilled in the art should understand that the specific connection structure between the insertion tube, the handle and the working channel tube 400 can adopt an existing structure in the relevant technology, which will not be described in detail here.

[0074] The handle includes a handle housing and an instrument sealing assembly, and the instrument sealing assembly is arranged in the handle housing, and the instrument sealing assembly is any of the instrument sealing assemblies described above. The proximal end of the working channel tube 400 is connected to the working channel 130 of the instrument sealing assembly, and the instrument can pass through the mounting base 100 and enter the working channel tube 400. The instrument channel hole 321 on the seal 300 can form a seal with the outer peripheral surface of the instrument, thereby blocking the working channel 130, and preventing the perfusion liquid from leaking from the working channel 130 while achieving the insertion of the instrument. In addition, the working channel tube 400 can form a first injection channel, and a second injection channel can be formed between the inner tube wall of the insertion tube and the instrument. When in use, one of the first injection channel and the second injection channel can be used as a liquid inlet channel, and the other as a liquid discharge channel. The structure of the first injection channel and the second injection channel can adopt the existing structure in the relevant technology, which will not be described in detail here.

[0075] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An instrument sealing assembly for an endoscope, characterized in that: include: A mounting base, wherein a working channel is provided on the mounting base, and a connecting structure for connecting a working channel tube is provided at a distal end of the working channel; and a sealing member, wherein the sealing member is arranged on the working channel; the sealing member comprises an instrument sealing portion, wherein the instrument sealing portion is provided with an instrument channel hole, wherein the instrument channel hole is used for the instrument to pass through and forms a seal with the outer peripheral surface of the instrument, and an escape space is provided on the distal side of the instrument sealing portion, wherein the escape space provides a movable space for the deflection of the instrument sealing portion.

2. The instrument sealing assembly according to claim 1, wherein: The seal comprises a base connecting portion, a middle portion and an instrument sealing portion, wherein the base connecting portion, the middle portion and the instrument sealing portion are arranged in sequence from outside to inside along the radial direction of the working channel, the base connecting portion is fixed on the mounting base, a thinning area is provided on the seal, the thickness of the thinning area is smaller than that of the instrument sealing portion, the seal is made of an elastic material, and the middle portion is formed by the thinning area.

3. The instrument sealing assembly according to claim 2, characterized in that: The middle part is annular, the radial outer side of the middle part is connected to the base connecting part, and the radial inner side of the middle part is connected to the instrument sealing part. The deformation resistance of the middle part is weaker than that of the instrument sealing part. A groove is provided on the surface of the distal side and / or the surface of the proximal side of the seal, and the groove forms the thinned area on the seal.

4. The instrument sealing assembly according to claim 3, characterized in that: The mounting base includes a connecting seat and a pressure cover, the working channel tube is connected to the connecting seat, the pressure cover presses the base connecting part toward the connecting seat along the axial direction of the working channel, and the working channel includes a first channel arranged on the connecting seat and a second channel arranged on the pressure cover; the pressure cover is provided with an annular positioning boss at one end close to the seal, the proximal side surface of the seal is provided with the groove, the positioning boss is embedded in the groove on the distal end face of the seal and is radially positioned with the seal.

5. The instrument sealing assembly according to any one of claims 1 to 4, characterized in that: The outer contour of the sealing part of the instrument is cylindrical.

6. The instrument sealing assembly according to any one of claims 2 to 4, characterized in that: The distal end of the instrument sealing portion protrudes from the distal end surface of the middle portion, and / or the proximal end of the instrument sealing portion protrudes from the proximal end surface of the middle portion.

7. The instrument sealing assembly according to claim 5, characterized in that: It comprises a one-way valve, which is arranged on the distal end side of the sealing element. The one-way valve has a cavity inside, the distal end of the instrument sealing part extends into the cavity, and there is a radial interval between the cavity wall of the cavity and the instrument sealing part.

8. The instrument sealing assembly according to claim 5, wherein: The axial dimension of the instrument channel hole is 2 mm to 5 mm.

9. The instrument sealing assembly according to any one of claims 1 to 4, characterized in that: The proximal end and the distal end of the instrument channel hole are both provided with chamfers, and the chamfers are used to guide the instrument to enter and exit the instrument channel hole.

10. An endoscope, characterized in that: include: an insertion tube, the insertion tube being used to be inserted into a target location; a working channel tube, the working channel tube being disposed within the insertion tube; A handle, comprising a handle shell and an instrument sealing assembly, wherein the instrument sealing assembly is disposed in the handle shell, and the instrument sealing assembly is the instrument sealing assembly described in any one of claims 1 to 9, wherein the proximal end of the working channel tube is connected to the working channel.

Images