CN112826432A

CN112826432A - Hysteroscope and sheath body structure

Info

Publication number: CN112826432A
Application number: CN202110018132.7A
Authority: CN
Inventors: 杨翔; 王臣峰; 郝进争; 李强
Original assignee: Shanghai Yodo Medical Technology Co ltd
Current assignee: Shanghai Yodo Medical Technology Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-05-25
Anticipated expiration: 2041-01-07
Also published as: WO2022148024A1; CN112826432B

Abstract

The invention discloses a hysteroscope and a sheath body structure, wherein the hysteroscope comprises the sheath body structure and a hysteroscope main body, and the sheath body structure comprises: an outer sheath; an inner sheath disposed within the outer sheath and forming a flashback gap between the inner sheath and the outer sheath, a distal end of the inner sheath extending outside a distal end of the outer sheath; wherein the distal end of the outer sheath and the inner sheath transition through an arcuate transition structure; wherein the distal end of the outer sheath has a return orifice at a location corresponding to the return gap. The distal sheath and the inner sheath of the sheath body structure of the hysteroscope are connected through the arc-shaped transition structure, so that the distal end of the sheath body structure is provided with the arc-shaped transition structure, and the damage to the uterine cavity in the process of stretching into the uterine cavity can be avoided.

Description

Hysteroscope and sheath body structure

Technical Field

The invention relates to the field of uterine cavity medical treatment, and further relates to a hysteroscope and a sheath body structure.

Background

The hysteroscope is a gynecological surgical instrument, and can be used for directly performing surgical treatment on all uterine cavity space-occupying lesions, endometrial biopsy, adhesion release and mediastinal uterus through the hysteroscope. Currently, surgical instruments used in conjunction with hysteroscopes include electric knife instruments, cold knife instruments, planing knife systems, and the like.

In the existing hysteroscope body structure with an instrument channel, the conventional straight cylinder type sheath has the following defects: firstly, the edge of the sheath is sharp, and sharp cutting injury is formed on the uterine cavity in the process of entering and exiting the uterine cavity, so that complications such as cervical atresia and the like are caused; secondly, a gap often exists between the traditional round sheath and the elliptic mirror body structure, so that the perfusion liquid flowing out of the instrument channel forms short circuit backflow through the gap, and effective circulation in the uterine cavity cannot be effectively formed.

In view of the foregoing, there is a need for an improved endoscope body structure with an instrument channel for a traditional hysteroscope.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a hysteroscope and a sheath structure, wherein a distal sheath and an inner sheath of the sheath structure of the hysteroscope are connected by an arc-shaped transition structure, so that the distal end of the sheath structure has an arc-shaped transition structure, and damage to a uterine cavity during insertion into the uterine cavity can be avoided.

In order to achieve the above object, an object of the present invention is to provide a sheath structure of a hysteroscope, including:

an outer sheath;

an inner sheath disposed within the outer sheath and forming a flashback gap between the inner sheath and the outer sheath, a distal end of the inner sheath extending outside a distal end of the outer sheath; wherein the distal end of the outer sheath and the inner sheath transition through an arcuate transition structure; wherein the distal end of the outer sheath has a return orifice at a location corresponding to the return gap.

Preferably, the inner sheath and the outer sheath are concentrically arranged, and two backflow gaps are correspondingly formed on two sides of the inner sheath.

Preferably, the inner sheath is eccentrically arranged in the channel of the outer sheath, one side of the inner sheath is attached to the outer sheath, and the backflow gap is formed between the other side of the inner sheath and the outer sheath.

Preferably, two backflow gaps are formed between the inner sheath and the outer sheath, the two backflow gaps are separated from each other, and two sets of backflow holes are formed in the outer sheath and respectively correspond to the two backflow gaps.

Preferably, the cross-sectional shape of the distal end of the inner sheath is elliptical, the cross-sectional shape of the distal end of the outer sheath is circular, and the length of the major axis of the elliptical inner sheath is the same as the diameter of the circular outer sheath.

Preferably, the distal end of the outer sheath is circular or elliptical.

Preferably, the arcuate transition structure decreases in size in a direction from the distal end of the outer sheath to the distal end of the inner sheath.

Preferably, the distal end of the outer sheath extends outwardly and is bent to form the arcuate transition structure.

Preferably, the sheath structure of the hysteroscope further comprises a scope body, the scope body is mounted at the lens mounting position at the distal end of the inner sheath of the sheath structure of the hysteroscope, and the scope body is provided with a channel opening corresponding to the instrument channel of the inner sheath.

Preferably, the cross-sectional shape of the distal end of the inner sheath is elliptical.

According to another aspect of the invention, the invention further provides a hysteroscope comprising:

a hysteroscope body;

the sheath structure of the hysteroscope of any one of the above aspects, the sheath structure of the hysteroscope is mounted to the hysteroscope main body;

a channel sealing mechanism of the hysteroscope;

the channel sealing mechanism is arranged between the hysteroscope main body and the working hand piece;

wherein hysteroscope's passageway sealing mechanism includes:

the channel sealing seat comprises a valve seat and a locking seat;

a channel sealing valve mounted between the valve seat and the locking seat;

the channel sealing valve comprises:

a first seal having a first opening;

the first sealing element and the second sealing element are mutually overlapped, the position of the second sealing element corresponding to the first opening protrudes in the direction away from the first sealing element to form a bulge, a buffer cavity is formed between the bulge of the second sealing element and the first sealing element, and the second bulge is provided with a second opening.

Further, the hysteroscope body is provided with a working pipeline;

the hysteroscope further comprises a working instrument adapted to pass through the working hand piece and the channel sealing mechanism;

the working pipeline is internally provided with a second clamping part which is arranged at a preset distance from the channel sealing valve, and at least one part of the second clamping part is positioned on the inlet path of the sleeve; the sleeve passing through the opening of the seal member is contactable with the second detent, the first detent compressing the resilient member as the device body is advanced further, the device body extending beyond the sleeve;

wherein, the work apparatus includes:

the head end of the instrument body is provided with a first clamping part;

a sleeve assembly mounted to a head end of the instrument body, the sleeve assembly including a sleeve and a resilient member, the sleeve surrounding an instrument channel, the instrument body mounted to the instrument channel, and the first detent in contact with the resilient member urging the instrument body to move within the instrument channel relative to the sleeve, the first detent capable of compressing the resilient member;

when the compression amount of the elastic piece is smaller than or equal to a preset value, the head end of the instrument body is positioned in the instrument channel; when the compression amount of the elastic piece is larger than the preset value, the head end of the instrument body extends out of the sleeve.

The hysteroscope and sheath structure provided by the invention has at least one of the following beneficial effects:

1. according to the hysteroscope and the sheath body structure, the distal sheath and the inner sheath of the sheath body structure of the hysteroscope are connected through the arc-shaped transition structure, so that the distal end of the sheath body structure is provided with the arc-shaped transition structure, and the damage to a uterine cavity in the process of extending into the uterine cavity can be avoided.

2. According to the hysteroscope and the sheath body structure provided by the invention, two backflow gaps are formed between the inner sheath and the outer sheath of the hysteroscope, and liquid in the uterine cavity can enter the backflow gaps from two directions and be discharged, so that the discharge of the liquid in the uterine cavity can be accelerated.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

FIG. 1 is a side view of a hysteroscope of a preferred embodiment of the invention;

FIG. 2 is a top view of a hysteroscope of a preferred embodiment of the invention;

FIG. 3 is an enlarged schematic view of the structure at C in FIG. 1;

FIG. 4 is a schematic structural diagram of a first variant embodiment of the enlarged structure at C in FIG. 1;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 7 is a front view of the sheath structure of the hysteroscope of a preferred embodiment of the invention;

FIG. 8 is a cross-sectional view of a second alternative embodiment at A-A in FIG. 1;

FIG. 9 is a cross-sectional view of a second alternative embodiment taken along line B-B of FIG. 1;

FIG. 10 is a front view of the sheath structure of the hysteroscope of a preferred embodiment of the invention;

figure 11 is a front view of a third variant embodiment of the sheath structure of the hysteroscope of the preferred embodiment of the invention;

figure 12 is an exploded view of a hysteroscope of the first preferred embodiment of the invention;

figure 13 is an exploded view of the channel sealing mechanism of the hysteroscope of the first preferred embodiment of the invention;

figure 14 is a side view of the channel sealing valve of the hysteroscope of the first preferred embodiment of the invention;

fig. 15 is a front view of the channel sealing valve of the hysteroscope of the first preferred embodiment of the invention;

FIG. 16 is a schematic structural view of a sleeve assembly of a hysteroscope of a second preferred embodiment of the invention;

figure 17 is a schematic structural view of a variant embodiment of the sleeve assembly of the hysteroscope of the second preferred embodiment of the invention in an unextended state;

figure 18 is a schematic structural view of a variant embodiment of the sleeve assembly of the hysteroscope of the second preferred embodiment of the invention in an extended state.

The reference numbers illustrate:

the hysteroscope comprises an outer sheath 1, a reflux hole 11, an inner sheath 2, an instrument channel 20, a lens mounting position 21, a lighting part 22, a reflux gap 10, an arc transition structure 3, a scope body 4 and a hysteroscope main body 5;

the working channel 10c, the channel sealing mechanism 2c, the channel sealing seat 21c, the valve seat 211c, the mounting groove 2110c, the locking seat 212c, the locking member 2121c, the channel sealing valve 22c, the first sealing member 221c, the first opening 2210c, the first coupling portion 2211c, the second sealing member 222c, the second opening 2220c, the protrusion portion 223c, the buffer cavity 2230c, the second coupling portion 2221c, the connecting member 224c, the locking protrusion 225c, the first position-limiting portion 226c, the second position-limiting portion 227c, the working device 3c, the device body 31c, the working hand 32c, the sleeve assembly 4c, the sleeve 41c, the device channel 40c, the elastic member 42c, the first position-clamping portion 51c, the second position-clamping portion 52c, and the third position-clamping portion 53 c.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Example 1

Referring to the attached drawings 1-11 of the specification, the sheath body structure of the hysteroscope provided by the invention is illustrated, and the outer sheath and the inner sheath at the far end of the sheath body structure of the hysteroscope provided by the invention are in smooth transition through an arc-shaped structure, so that damage to the uterine cavity in the process of extending into the uterine cavity can be reduced, and the use safety performance of the hysteroscope is improved.

Specifically, the sheath body structure of the hysteroscope comprises an outer sheath 1 and an inner sheath 2, wherein the inner sheath 2 is arranged in the outer sheath 1, a backflow gap 10 is formed between the inner sheath 2 and the outer sheath 1, and the distal end of the inner sheath 2 extends to the outer side of the distal end of the outer sheath 1; wherein the cross-sectional shape of the inner sheath 2 is an ellipse, and the distal end of the inner sheath 2 has a lens mounting position 21; wherein the distal end of the inner sheath 2 and the distal end of the outer sheath 1 are transited by an arc transition structure 3.

Referring to the attached fig. 3, the inner sheath 2 protrudes from the outer side of the arc transition structure 3. Referring to fig. 4 of the specification, in a variant embodiment of the invention, the head end of the inner sheath 2 can also be tangent to the curved transition structure 3.

The inner sheath 2 has an instrument channel 20 for passage of instruments. During use, the distal end of the sheath structure of the hysteroscope is adapted to extend into the uterine cavity, and fluid is adapted to enter the uterine cavity through the instrument channel 20, the fluid in the uterine cavity exiting through the return gap 10 between the inner sheath 2 and the outer sheath 1. The distal end of the outer sheath 1 and the distal end of the inner sheath 2 of the sheath body structure of the hysteroscope provided by the invention are transited through the arc-shaped transition structure 3, and the arc-shaped transition structure 3 can enable the connection between the outer sheath 1 and the inner sheath 2 to be transited smoothly, so that the damage to the uterine cavity in the process of extending into the uterine cavity is avoided.

It should be noted that the distal end in the present invention refers to the end extending into or near the uterine cavity during operation, and the proximal end corresponding to the distal end refers to the end held by the operator or the end near the operator.

Referring to the description of fig. 5, 6 and 7, preferably, the inner sheath 2 is concentrically arranged with the outer sheath 1, and two backflow gaps 10 are correspondingly formed on two sides of the inner sheath 2. Two backflow gaps 10 are formed between the inner sheath 2 and the outer sheath 1, the two backflow gaps 10 are separated from each other, and two sets of backflow holes 11 are formed in the outer sheath 1 and respectively correspond to the two backflow gaps 10. It should be noted that the two backflow gaps 10 are independent of each other, and one of them can be selectively used in the backflow process to change the outflow direction of the liquid in the uterine cavity.

Further, the cross-sectional shape of the distal end of the inner sheath 2 is an ellipse, the cross-sectional shape of the distal end of the outer sheath 1 is a circle, and the length of the major axis of the elliptical inner sheath 2 is the same as the diameter of the circular outer sheath 1.

Preferably, the distal end of the outer sheath 1 is rounded. The circular outer sheath 1 and the elliptical inner sheath 2 are concentrically arranged, and two return gaps 10 are formed between the circular outer sheath 1 and the elliptical inner sheath 2. Preferably, the two backflow gaps 10 are symmetrical with respect to the center of the elliptical inner sheath 2 and are located on both sides of the elliptical inner sheath 2.

It should be noted that, through the two backflow gaps 10 disposed on the two sides of the inner sheath 2, the liquid in the uterine cavity can enter the backflow gaps 10 in two directions, respectively, and the discharge efficiency of the liquid in the uterine cavity is improved.

Referring to the attached

drawings

1 and 3 in the specification, the reflux hole 11 is opened at a position corresponding to the reflux gap 10 at the distal end of the sheath 1, and the reflux hole 11 communicates with the reflux gap 10.

In the working process of the sheath body structure of the hysteroscope, liquid enters the uterine cavity through the instrument channel 20 of the inner sheath 2, and the liquid in the uterine cavity enters the backflow gap 10 through the backflow hole 11 on the outer sheath 1 and is discharged outwards through the backflow gap 10, so that the whole liquid circulation is completed.

Correspondingly, because the number of the backflow gaps 10 between the outer sheath 1 and the inner sheath 2 is two, the outer walls of the outer sheath 1 corresponding to the two backflow gaps 10 are respectively provided with the backflow holes 11 in a preset number.

Referring to fig. 8, 9 and 10 of the specification, in a second modified embodiment of the present invention, the inner sheath 2 is eccentrically disposed to the outer sheath 1, that is, the centers of the inner sheath 2 and the outer sheath 1 are offset from each other by a predetermined distance. In the present modified embodiment, one side of the inner sheath 2 is attached to the outer sheath 1, the return gap 10 is formed between the other side of the inner sheath 2 and the outer sheath 1, and one return gap 10 is formed between the inner sheath 2 and the outer sheath 1. It should be noted that, since the inner sheath 2 is eccentrically arranged in the outer sheath 1, a backflow gap 10 formed between the inner sheath 2 and the outer sheath 1 has a larger size, which is more favorable for discharging the liquid in the uterine cavity. It is further noted that the size of the instrument channel 20 can be increased by arranging the inner sheath 2 eccentrically within the outer sheath 1.

Referring to the description of fig. 5, 6 and 7, the cross-sectional shape of the sheath 1 is preferably circular. That is, the cross-sectional shape of the inner sheath 2 is an ellipse, the cross-sectional shape of the outer sheath 1 is a circle, and one reflux gap 10 or two reflux gaps 10 may be formed between the outer sheath 1 and the inner sheath 2. Optionally, when two backflow gaps 10 are formed between the outer sheath 1 and the inner sheath 2, the sizes of the two backflow gaps 10 may be the same or different, and when the sizes of the two backflow gaps are the same, the liquid in the uterine cavity at the two ends of the outer sheath 1 is uniformly discharged outwards; when the sizes of the two backflow gaps are different, the liquid at the two ends of the outer sheath 1 in the uterine cavity can be discharged outwards at a differential speed, and various different use requirements are met.

Alternatively, the cross-sectional shape of the outer sheath 1 can also be elliptical, that is, the distal end of the outer sheath 1 and the distal end of the inner sheath 2 are both elliptical. Preferably, the major axis of the oval shape of the cross section of the outer sheath 1 coincides with the major axis of the oval shape of the cross section of the inner sheath 2. Alternatively, the major axis of the cross-sectional ellipse of the outer sheath 1 can also be perpendicular to the cross-sectional ellipse of the inner sheath 2. The specific angle of arrangement between the outer sheath 1 and the inner sheath 2 should not constitute a limitation of the present invention.

Preferably, the size of the arcuate transition structure 3 decreases gradually from the distal end of the outer sheath 1 to the distal end of the inner sheath 2. That is, the arcuate transition structure 3 is tapered in size in the direction of the sheath structure's penetration into the uterine cavity, so as to facilitate the sheath structure's penetration into the uterine cavity.

Further, in the preferred embodiment, the distal end of the outer sheath 1 extends outwardly and is bent to form the curved transition structure 3. That is, in the preferred embodiment, the arc transition structure 3 is integrally extended from the outer sheath 1, so that the smoothness of the arc transition structure 3 can be increased, and the sheath structure can be conveniently installed.

Referring to the attached figure 7 in the specification, the sheath structure of the hysteroscope further comprises a scope body 4, the scope body 4 is mounted at the lens mounting position 21 of the inner sheath 2 of the sheath structure of the hysteroscope, and the scope body 4 is provided with a channel opening corresponding to the instrument channel 20 of the inner sheath 2.

Preferably, the instrument channel 20 of the inner sheath 2 has a diameter larger than the diameter of the scope body 4.

Referring to the specification and the drawing of fig. 7, the distal end of the inner sheath 2 is provided with an illuminating piece 22, and the illuminating piece 22 is arranged adjacent to the endoscope body 4 and used for illuminating the uterine cavity during use so as to facilitate the examination or operation of the uterine cavity.

Referring to the description of fig. 7 and 10, the instrument channel 20 is circular in shape, respectively. Referring to the description and the attached drawings 11, in a third variant embodiment of the present invention, the instrument channel 20 is an oval shape, and on the premise of the same cross-sectional area, after a round instrument is inserted into the oval instrument channel 20, two water inlet channels are formed between two sides of the instrument and the inner sheath, so that water can be more smoothly introduced.

Example 2

With reference to the accompanying drawings 12 to 15 in the specification, the hysteroscope provided by the invention is illustrated, and the channel sealing mechanism of the hysteroscope provided by the invention can better reduce the outflow of liquid in the working pipeline when the working device 3c passes through, the working device 3c is replaced and the working device 3c is absent, and can keep the liquid pressure in the working pipeline in the use process of the hysteroscope within the range of 80-120 mmHg.

The hysteroscope provided by the invention comprises a hysteroscope main body 5 and the sheath body structure of the hysteroscope in the preferred embodiment.

The hysteroscope also comprises a channel sealing mechanism 2c and a working appliance 3 c. The hysteroscope body 5 is provided with a working pipeline 10 c; the working instrument 3c includes an instrument body and a working hand 32c, the working hand 32c being mounted to the instrument body; the channel sealing mechanism 2c is adapted to be mounted between the working hand piece 32c and the hysteroscope body 5, the instrument body is adapted to be mounted into the working channel 10 c; the channel sealing mechanism 2c can play a role in sealing during the process of the instrument body entering and exiting the working pipeline 10c, and prevent the liquid in the working pipeline 10c from leaking during the process of the instrument body entering and exiting the working pipeline 10 c.

It should be noted that the working device 3c includes, but is not limited to, working devices such as electrodes (ring or needle), surgical devices (forceps, scissors, hooks, shovels, etc.), and planing blades.

Specifically, the passage sealing mechanism 2c includes a passage sealing seat 21c and a passage sealing valve 22c, and the passage sealing valve seat 21c includes a valve seat 211c and a locking seat 212 c; the channel sealing valve 22c is mounted between the valve seat 211c and the locking seat 212 c. The valve seat 211c is adapted to be mounted to the hysteroscope body 5, and the working hand 32c of the working instrument 3c is adapted to be mounted to the locking seat 212 c.

Further, the channel sealing valve 22c comprises a first seal 221c and a second seal 222 c. The first seal 221c has a first opening 2210 c;

the first seal 221c and the second seal 222c are stacked on each other, the second seal 222c protrudes in a direction away from the first seal 221c to form a protrusion 223c corresponding to the position of the first opening 2210c, a buffer cavity 2230c is formed between the protrusion 223c of the second seal 222c and the first seal 221c, and the protrusion 223c has a second opening 2220 c.

It is noted that in the preferred embodiment, the channel sealing valve 22c comprises two seals stacked on top of each other, and during installation and pulling out of the apparatus body, the second opening 2220c of the second seal 222c is in a closed state during the movement of the apparatus body into and out of the first opening 2210c of the first seal 221c, preventing leakage of the liquid in the working channel 10 c. During the process of the instrument body entering and exiting the second seal 222c, the instrument body fills the first opening 2210c of the first seal 221c, effectively preventing liquid from leaking out of the connection of the first seal 221c and the instrument body.

Referring to fig. 15 of the specification, preferably, the second opening 2220c is a line-shaped opening, and the first opening 2210c is a circular opening. The first sealing member 221c and the second sealing member 222c are made of medical silica gel material. The second opening 2220c of the second seal 222c can automatically return to a closed state when there is no ingress or egress of the instrument body.

Preferably, the convex portion 223c of the second seal 222c is a hemispherical convex.

It is noted that the projection 223c of the second seal 222c is capable of forming the buffer cavity 2230c between the first seal 221c and the second seal 222c when the first seal 221c and the second seal 222c are in a stacked state, shortening the distance between the first seal 221c and the second seal 222c, and facilitating the installation of the first seal 221c and the second seal 222 c.

Further, the channel sealing valve 22c further comprises a connector 224c, the connector 224c connects the first seal 221c and the second seal 222c, and the first seal 221c and the second seal 222c can rotate around the connector 224 c.

It should be noted that the first sealing element 221c and the second sealing element 222c are connected by the connecting element 224c, so that the corresponding first sealing element 221c and the corresponding second sealing element 222c are integrated, thereby facilitating assembly during the production process and preventing the loss of the sealing elements.

Preferably, the connecting member 224c, the first sealing member 221c and the second sealing member 222c are integrally connected to each other.

A predetermined position of the first seal 221c extends radially outward to form a first joint portion 2211c, a predetermined position of the second seal 222c extends radially outward to form a second joint portion 2221c, and the first joint portion 2211c corresponds to the second joint portion 2221 c; the first coupling portion 2211c has an axial through hole, and the second coupling portion 2221c has an axial locking projection 225c, and the locking projection 225c is adapted to pass through the through hole.

The locking protrusion 225c passes through the through hole to connect the first combining portion 2211c and the second combining portion 2221c, so that the first sealing member 221c and the second sealing member 222c are kept in a mutually overlapped state during installation, and production and assembly are facilitated.

Referring to fig. 13 of the specification, the valve seat 211c has a mounting groove 2110c, and the channel sealing valve 22c is mounted to the mounting groove 2110 c; the valve seat 211c further has a first and a second position-limiting grooves communicating with the mounting grooves 2110 c.

Further, after the first sealing member 221c and the second sealing member 222c are overlapped, the overlapped connecting member 224c forms a first stopper 226c, and the overlapped first combining portion 2211c and the overlapped second combining portion 2221c form a second stopper 227 c; the first limiting portion 226c and the second limiting portion 227c are respectively adapted to be mounted in a first limiting groove and a second limiting groove of the channel sealing seat 21c of the channel sealing mechanism 2 c.

It should be noted that a connecting line between the first limiting portion 226c and the second limiting portion 227c of the channel sealing valve coincides with an opening length extending direction of the "i" shaped second opening 2220c, and a connecting line between the first limiting groove and the second limiting groove of the valve seat 211c coincides with a connecting line between the first limiting portion 226c and the second limiting portion 227 c. The channel sealing valve 22c can be pre-installed by providing the first and second retaining grooves on the valve seat 211c, which facilitates the assembly of the valve seat 211c with the locking seat 212 c; on the other hand, it is possible to maintain a certain positional relationship between the second seal 222c and the valve seat 211c such that the second opening 2220c of the second seal 222c is vertically mounted to the valve seat 211 c.

Further, the predetermined position of the valve seat 211c has an assembly groove, and the predetermined position of the locking seat 212c has an assembly protrusion adapted to be fitted into the assembly groove.

The number of the fitting grooves of the valve seat 211c is two, and the number of the fitting protrusions of the locking seat 212c is also two, and the two fitting protrusions are respectively fitted with the two fitting grooves; the locking seat 212c has a third fitting groove at a position corresponding to the second position-limiting portion 227c of the channel sealing valve 22c for receiving the locking protrusion 225c passing through the first combining portion 2211 c.

It should be noted that, in the preferred embodiment, the two assembling protrusions and the third assembling grooves of the locking seat 212c are distributed in a triangular shape, and the channel sealing valve 22c can be installed between the valve seat 211c and the locking seat 212c only if the two assembling protrusions correspond to the two assembling grooves and the locking protrusion 225c corresponds to the third assembling groove.

Further, a locking piece 2121c is installed on the locking seat 212c, and the locking piece 2121c can lock the working hand 32c after the working hand 32c is installed on the locking seat 212c, so that the connection stability between the working hand 32c and the locking seat 212c is improved.

Preferably, one end of the locking seat 212c connected to the working hand piece 32c is a tapered groove, one end of the working hand piece 32c connected to the locking seat 212c is a tapered protrusion, and the tapered protrusion of the working hand piece 32c is matched with the tapered groove of the locking seat 212c, so that the tightness of the connection between the locking seat 212c and the working hand piece 32c can be improved.

Further, the valve seat 211c is installed on the hysteroscope main body 5 in a threaded connection manner, one end of the valve seat 211c connected to the hysteroscope main body 5 is provided with an internal thread, and one end of the hysteroscope main body 5 connected to the valve seat 211c is provided with an external thread. The preset position of the valve seat 211c has an installation mark, which is used to enable the linear second opening 2220c to be vertically installed corresponding to the hysteroscope main body 5 in the process of installing the channel sealing mechanism 2c to the hysteroscope main body 5.

It should also be pointed out that the mechanical passage of the locking seat 212c is of non-circular design, ensuring that the working device 3c (e.g. loop, hook) which is not angularly symmetrical can be inserted and withdrawn according to a predetermined angle during the insertion and extraction of the working device 3 c. Accordingly, the customized motor needs to be designed to be non-circular to match the mechanical channel of the locking seat 212c, and has simple structure, low cost and high process stability.

During the insertion of the working device 3c, the second opening 2220c of the second seal 222c is in a closed state during the process of the head end of the device body passing through the first seal 221c, so that the liquid in the working channel 10c can be prevented from leaking during the process of the head end of the device body passing through the first seal 221 c. After the head end of the instrument body passes through the first seal 221c, the instrument body fills the first opening 2210c of the first seal 221c during passage through the second seal 222c, thereby preventing liquid leakage within the working channel 10c during passage of the instrument body through the second seal 222 c.

In the process of withdrawing the working device 3c, after the device body withdraws from the second seal 222c, the second opening 2220c of the second seal 222c is automatically switched to a closed state, and the communication between the working pipeline 10c and the buffer cavity 2230c is cut off; at this time, the instrument body still fills the first opening 2210c of the first seal 221c, and liquid still does not leak. After the instrument body exits the first seal 221c, only a small amount of fluid leaks from within the buffer cavity 2230 c.

Preferably, the end of the working pipe 10c is made of PEEK material, so that the end of the working pipe 10c can be prevented from being damaged in the working process of the working device 3c, and the current can be isolated, thereby preventing the occurrence of leakage accidents.

Example 2c

Referring to fig. 16 of the specification, a second preferred embodiment of the channel sealing mechanism of the hysteroscope provided by the present invention is illustrated, and the channel sealing mechanism of the hysteroscope of the second preferred embodiment is different from the above preferred embodiments in that, in the second preferred embodiment, the sleeve assembly mounted on the working device 3c is further included, and the sleeve assembly can prevent the head end of the working device 3c from contacting the channel sealing mechanism 2c during the process of passing the working device 3c through the channel sealing mechanism 2c, so that the head end of the relatively precise working device 3c can be protected.

Referring to fig. 16 in the specification, in particular, the hysteroscope further includes a sleeve assembly 4c, the sleeve assembly 4c is adapted to be mounted to the instrument body 31c of the working instrument 3c for protecting the head end of the instrument body 31c during mounting of the instrument body 31c of the working instrument 3c to the working channel 10 c.

Further, the sleeve assembly 4c includes a sleeve 41c and an elastic member 42c, the sleeve 41c surrounds and forms an instrument channel 40c, and the elastic member 42c is mounted to the instrument channel 40c of the sleeve 41 c. The tool body 31c of the working tool 3c can be passed through the tool channel 40c to mount the sleeve assembly 4c to the working tool 3 c.

Further, the apparatus body 31c has a first positioning portion 51c, and when the sleeve assembly 4c is mounted on the working apparatus 3c, the first positioning portion 51c can contact with the elastic member 42c, so that the working apparatus 3c can drive the sleeve assembly 4c to move together. When the first capture portion 51c of the device body 31c is not moved in the sleeve 41c to compress the elastic member 42c, the head end of the device body 31c is located in the device channel 40c of the sleeve 41 c; when the first capture portion 51c of the device body 31c moves in the sleeve 41c and compresses the elastic member 42c by a compression amount greater than a preset value, the head end of the device body 31c moves out of the device channel 40c of the sleeve 41 c.

Further, the working channel 10c further has a second positioning portion 52c therein, the second positioning portion 52c is disposed adjacent to and in the same straight line as the channel sealing mechanism 2c, the sleeve 41c of the sleeve assembly 4c can contact with the second positioning portion 52c after passing through the first sealing member 221c and the second sealing member 222c of the channel sealing mechanism 2c, and the second positioning portion 52c can limit the movement depth of the sleeve 41c in the working channel 10c, so that the first positioning portion 51c of the device body 31c can compress the elastic member 42c in the sleeve 41c, and the working device 3c can move to the outside of the device channel 40c of the sleeve 41 c.

Preferably, in the present preferred embodiment, the second opening 2220c of the second seal member 222c of the passage seal mechanism 2c is in a cross shape. Preferably, the first sealing member 221c and the second sealing member 222c are made of medical silicone material.

Aligning the instrument body 31c with the sleeve assembly 41c with the working channel 10c during insertion of the working instrument 3c, the sleeve 41c of the sleeve assembly 4c first contacting the first seal member 221c and the second seal member 222c of the channel sealing mechanism 2c and passing through the first seal member 221c and the second seal member 222c of the channel sealing mechanism 2c in sequence during pushing the instrument body 31c and the sleeve assembly 41c forward; continuing to push the device body 31c of the working device 3c forward, the sleeve 41c contacting the second detent 52c, the sleeve 41c stopping moving in the working channel 10 c; the instrument body 31c is pushed forward, and the head end of the instrument body 31c extends out of the sleeve 41c to work.

It should be noted that the head end of the device body 31c is retained in the sleeve 41c until the sleeve 41c is not in contact with the second capture portion 52c in the working channel 10 c. During the process that the sleeve 41c contacts with the first sealing element 221c and the second sealing element 222c of the channel sealing mechanism 2c and passes through the first sealing element 221c and the second sealing element 222c of the channel sealing mechanism 2c, the head end of the instrument body 31c does not contact with the first sealing element 221c and the second sealing element 222c of the channel sealing mechanism 2c, so that the head end of the instrument body 31c can be effectively protected.

Similarly, during the process of withdrawing the working device 3c, as the device body 31c is withdrawn, the elastic member 42c in the sleeve 41c gradually returns to its original shape, and the head end of the device body 31c gradually enters the sleeve 41 c; as the working device 3c continues to be withdrawn, the head end of the device body passes through the first seal member 221c and the second seal member 222c of the passage seal mechanism 2c under the protection of the sleeve 41c of the sleeve assembly 4c, completing the withdrawal operation of the working device 3 c.

Further, the distance between the second positioning portion 52c and the channel sealing mechanism 2c is greater than the length of the sleeve 41c, and when the sleeve 41c contacts the second positioning portion 52c during the insertion of the working device 3c, the sleeve 41c is completely located between the second positioning portion 52c and the channel sealing mechanism 2c, and the first sealing member 221c of the channel sealing mechanism 2c contacts the device body 31c to prevent the liquid from leaking.

It should be noted that the rear wall of the sleeve 41c is connected to the device body 31c in a sealing manner, so that during the process that the head end of the sleeve 41c contacts with the first sealing member 221c and the second sealing member 222c of the channel sealing mechanism 2c and passes through the channel sealing mechanism 2c, liquid enters the sleeve 41c and leaks through the connection between the sleeve 41c and the working device 3 c. The sealing mechanism at the joint of the sleeve 41c and the working device 3c is a medical silica gel pad.

It should be noted that, during the insertion of the working device, after the sleeve 41c contacts the second positioning portion 52c, the working device 3c is further pushed forward, the sleeve 41c stops moving, and the first positioning portion 51c of the working device 3c compresses the elastic member 42 c. In the process of withdrawing the working device 3c from the working channel 10c, after the elastic member 42c in the sleeve 41c returns to its original length, the first capture portion 51c on the device body 31c contacts the rear wall of the sleeve 41c and can pull the sleeve 41c away through the first seal 221c and the second seal 222c of the channel seal mechanism 2 c.

With reference to the description and to fig. 17 and 18, a variant of the second preferred embodiment of the hysteroscope according to the present invention is illustrated, in which the elastic member 42c of the sleeve assembly 4c and the sleeve 41c are arranged outside the sleeve 41c along a straight line.

Referring to fig. 17 and 18 in the specification, the elastic member 42c is located between the sleeve 41c and the first capture portion 51 c. The device body 31c further includes a third positioning portion 53c, and the third positioning portion 53c is located in the device channel 40c formed by the sleeve 41 c. In other words, the rear wall of the sleeve 41c and the elastic member 42c are respectively located between the third positioning portion 53c and the first positioning portion 51 c.

During the process of extending the working device 3c into the working channel 10c, before the head end of the sleeve 41c is not in contact with the second positioning portion 52c, the first positioning portion 51c pushes the elastic member 42c, the elastic member 42c pushes the sleeve 41c to move synchronously, and the head end of the device body 31c is located in the device channel 40c of the sleeve 41c, so that the head end of the device body 31c can be protected; after the head end of the sleeve 41c contacts the second positioning portion 52c, the device body 31c is pushed forward, the sleeve 41c stops moving, the first positioning portion 51c compresses the elastic member 42c, and the head end of the device body 31c extends out of the sleeve 41 c.

In the process that the working device 3c exits the working channel 10c, the elastic member 42c gradually returns to the original shape along with the exit of the device body 31c, and the head end of the device body 31c moves into the sleeve 41 c. Continuing to withdraw the device body 31c, the third click portion 53c contacts the rear wall of the sleeve 41c and pulls the sleeve 41c to withdraw together.

Example 3c

According to another aspect of the invention, the invention further provides a method of sealing a channel of a hysteroscope, comprising:

during the process of inserting the working device 3c into the working channel 10c, the elastic member 42c is pushed by the first capture portion 51c of the working device 3c to drive the sleeve 41c located outside the working device 3c to move together through the channel sealing mechanism 2c, and during the process of passing the head end of the sleeve 41c through the channel sealing mechanism 2c, the head end of the working device 3c is located inside the sleeve 41 c; wherein the channel sealing means 2c is located in the working channel 10 c;

when the head end of the sleeve 41c passes through the opening 20c of the sealing member 42c and contacts the second positioning portion 52c installed in the working pipe 10c after a predetermined distance, the working device 3c is allowed to move forward relative to the sleeve 41c and extend out of the sleeve 41c, and the first positioning portion 51c compresses the elastic member 42c between the first positioning portion 51c and the sleeve 41 c.

Further, the method for sealing the channel of the hysteroscope further comprises the following steps:

during the process of withdrawing the working device 3c from the working channel 10c, with the withdrawal of the working device 3c, before the elastic member 42c returns to its original shape, a force is applied to the sleeve 41c by the elastic member 42c, so that the head end of the sleeve 41c is kept in contact with the second detent portion 52c, and the head end of the working device 3c enters the sleeve 41 c;

after the elastic member 42c returns to its original shape, the first detent portion 51c or the third detent portion 53c of the working device 3c contacts the rear wall of the sleeve 41c, and pulls the sleeve 41c through the channel sealing mechanism 2c along with the working device 3 c.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. Hysteroscope's sheath body structure, its characterized in that includes:

an outer sheath;

2. The hysteroscope sheath construction of claim 1, wherein the inner sheath is disposed concentrically with the outer sheath.

3. The sheath structure of a hysteroscope according to claim 1, wherein the inner sheath is eccentrically disposed within the channel of the outer sheath, one side of the inner sheath is disposed in abutment with the outer sheath, and the return gap is formed between the other side of the inner sheath and the outer sheath.

4. The sheath structure of hysteroscope according to claim 2, wherein two backflow gaps are formed between the inner sheath and the outer sheath, and the two backflow gaps are separated from each other, and the outer sheath has two sets of backflow holes corresponding to the two backflow gaps.

5. The hysteroscope sheath structure of claim 4, wherein the cross-sectional shape of the distal end of the inner sheath is elliptical, the cross-sectional shape of the distal end of the outer sheath is circular, and the length of the major axis of the elliptical inner sheath is the same as the diameter of the circular outer sheath.

6. A sheath construction for a hysteroscope according to claim 2 or 3, wherein the arcuate transition structure tapers in size in a direction from the distal end of the outer sheath to the distal end of the inner sheath.

7. The hysteroscope sheath construction of claim 6, wherein the distal end of the outer sheath extends outwardly and is bent to form the arcuate transition structure.

8. The sheath structure of a hysteroscope according to claim 1, further comprising a scope body mounted at a lens mounting location distal to the inner sheath of the sheath structure of the hysteroscope, the scope body having a channel opening corresponding to an instrument channel of the inner sheath.

9. Hysteroscope, its characterized in that includes: