Hysteroscope

Abstract

The invention discloses a hysteroscope. The hysteroscope comprises an insertion part, a handle and a liquid return mechanism, the liquid return mechanism comprises an outer sleeve body fixed to the handle and an inner sleeve body sleeved with the outer sleeve body, a penetrating channel penetrating through the first end face and the second end face, opposite to each other, of the inner sleeve body is formed in the inner sleeve body, and the penetrating channel comprises a first inserting cavity and a second inserting cavity which are in butt joint and communicated. The insertion part comprises an outer tube and an inner tube, the near end of the outer tube is inserted into the second insertion cavity, and the near end of the inner tube extends out of the near end of the outer tube and is inserted into the first insertion cavity; a notch is formed in the side wall of the near end of the outer tube and / or the inner tube; a lateral through hole and a clamping structure clamped with the notch are arranged on the side wall of the inner sleeve body, and the lateral through hole further penetrates through the clamping structure and is communicated with the notch; the far end of the inner tube is provided with a flat tube section, and the flatness of the flat tube section changes in the direction away from the inner sleeve body. On one hand, the notch of the insertion part integrates the clamping function and the liquid passing function, and on the other hand, the defect that the liquid passing gap is insufficient is overcome.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a hysteroscope. Background Art

[0002] Minimally invasive surgical procedures are becoming more and more common in the surgical field due to the shorter recovery time, shorter duration of surgery, and low cost. Minimally invasive surgical procedures are usually performed by inserting instruments through small portals or artificially created openings in the patient. Hysteroscopic surgery is one of them. Hysteroscopy is mainly used in gynecology, such as fine needle aspiration of ovarian cysts, pelvic adhesion separation, fallopian tube obstruction, torsion, adhesion correction, ectopic pregnancy surgery, uterine myoma removal, gynecological tumor surgery, subtotal and total hysterectomy for benign diseases, etc.

[0003] Among them, in the existing hysteroscope, since its insertion part includes an outer tube, an inner tube placed inside the outer tube, and a camera module, a certain gap needs to be reserved between the inner tube and the outer tube, and the gap is generally used to reflux the liquid in the uterine cavity. Since the size specifications of the outer tube are subject to national standards, manufacturers cannot arbitrarily change the inner and outer diameters of the outer tube. In addition, since the insertion part, the outer tube, and the inner tube are all straight tubes, and the camera module occupies a certain gap between the outer tube and the inner tube, there is insufficient space left for liquid reflux.

[0004] In addition, in the existing hysteroscope, lateral holes need to be opened on its outer tube, inner tube and end seal sleeve body so that the end seal sleeve body can be connected with the internal space of the inner tube and the gap between the outer tube and the inner tube respectively through the lateral holes; after the end seal sleeve body is respectively inserted into the proximal ends of the outer tube and the inner tube, the outer tube and the inner tube can also rotate relative to the end seal sleeve body, thereby causing the lateral through holes on the end seal sleeve body and the lateral holes of the outer tube and the inner tube to be misaligned, thereby increasing the assembly complexity among the end seal sleeve body, the outer tube and the inner tube.

[0005] In addition, in the existing hysteroscope, the channel opened by its end cap for docking and communicating with the internal space of the inner tube runs through the first end face and the second end face opposite to the end cap, so that the instrument that penetrates along the inner tube and then extends from the channel into the uterine cavity is greatly restricted by the end cap, thereby causing the movement range of the instrument in the uterine cavity to be small.

[0006] Therefore, there is an urgent need for a hysteroscope to overcome one or more of the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a hysteroscope, which, on the one hand, enables the notch of the insertion part to integrate the functions of snap connection and liquid passage to simplify the assembly complexity, and on the other hand, solves the defect of insufficient liquid passage gap.

[0008] To achieve the above-mentioned purpose, the hysteroscope of the present invention includes an insertion part, a handle and a liquid return mechanism. The liquid return mechanism includes an outer sleeve fixed to the handle and an inner sleeve fitted inside the outer sleeve, the inner sleeve has a through channel penetrating the first end face and the second end face of the inner sleeve, and the through channel includes a first insertion cavity and a second insertion cavity that are connected to each other; the insertion part includes an outer tube and an inner tube, each of which is a long strip, the proximal end of the outer tube is inserted into the second insertion cavity, the inner tube is placed inside the outer tube, and the proximal end of the inner tube also extends out of the proximal end of the outer tube and is inserted into the first insertion cavity. An insertion cavity; a notch is provided on the side wall of the proximal end of the outer tube and / or the inner tube, and the notch extends along the length direction of the outer tube or the inner tube where the notch is located and penetrates the end wall of the proximal end where the notch is located; a lateral through hole and a clamping structure protruding in the through channel and used for clamping with the notch are provided on the side wall of the inner sleeve body, and the lateral through hole also penetrates the clamping structure and is connected with the notch; the distal end of the inner tube has a flat tube section, and the flatness of the flat tube section is arranged to change in the direction away from the inner sleeve body.

[0009] Compared with the prior art, the invention has the following arrangement: "a notch is provided on the side wall of the proximal end of the outer tube and / or the inner tube, and the notch extends along the length direction of the outer tube or the inner tube where the notch is located and penetrates the end wall of the proximal end where the notch is located". Therefore, after the proximal end of the outer tube and / or the inner tube is inserted into the inner sleeve, the notch is engaged by the engaging structure and cannot rotate relative to the inner sleeve. Thus, the outer tube or the inner tube where the notch is located is in a position to be correctly connected with the inner sleeve, thus simplifying the assembly process. In addition, the notch can be used to achieve liquid communication between the inner sleeve and the outer tube or the inner tube where the notch is located. At the same time, the inner tube has a flat tube section whose flatness changes in the direction away from the inner sleeve, so that there is a more sufficient gap between the flat tube section and the instrument and between the flat tube section and the distal end of the outer tube, thereby solving the defect of insufficient liquid communication gap.

[0010] Preferably, the flatness of the flat tube segments increases in a direction away from the inner sleeve body.

[0011] Preferably, the flat tube section curves and extends away from the inner sleeve to form a curved structure.

[0012] Preferably, the cross section of the inner tube between the proximal end of the inner tube and the flat tube section is a symmetrical structure.

[0013] Preferably, the cross section of the flat tube section is an asymmetric structure in the flat direction.

[0014] Preferably, the distal end of the inner tube further has a flat straight tube section connected to the end of the flat tube section.

[0015] Preferably, the cross section of the flat straight tube section is an asymmetric structure in the flat direction.

[0016] Preferably, the side wall of the proximal end of the outer tube or the inner tube where the notch is located is further provided with an inclined surface adjacent to the end wall surface and used to expand the notch, and an arc-shaped transition surface used to smoothly transition between the end wall surface and the inclined surface.

[0017] Preferably, the liquid return mechanism further includes a first sealing ring, a second sealing ring and a third sealing ring which are arranged on the outer sleeve and spaced apart along the penetration direction of the through channel, the first sealing ring, the second sealing ring, the outer sleeve and the inner sleeve together enclose a first channel, the second sealing ring, the third sealing ring, the outer sleeve and the inner sleeve together enclose a second channel; the snap-fitting structures are respectively protruded in the first insertion cavity and the second insertion cavity, and the snap-fitting structures on the first insertion cavity and the second insertion cavity each correspond to the lateral through hole; the lateral through hole corresponding to the snap-fitting structure on the first insertion cavity enables the first channel to be connected with the notch on the inner tube; the lateral through hole corresponding to the snap-fitting structure on the second insertion cavity enables the second channel to be connected with the notch on the outer tube.

[0018] Preferably, the outer sleeve is a cylindrical structure, the closed end of the cylindrical structure is arranged opposite to the first end face of the inner sleeve, and the closed end is penetrated by a device entry and exit channel extending along the penetration direction of the through channel.

[0019] Preferably, the hysteroscope of the present invention also includes a liquid circuit sealing structure, which includes a first sealing member located in the outer sleeve and sealingly matched with the first end face of the inner sleeve, the first sealing member having a sealing body for sealingly matching with the first end face of the inner sleeve, a tapered extension body extending from the sealing body and extending into the through channel, and a blind hole simultaneously opened in both the extension body and the sealing body, the orifice of the blind hole being located on the end face of the sealing body facing away from the extension body.

[0020] Preferably, the extension body has two inner inclined surfaces arranged opposite to each other with the hole center line of the blind hole as the center at the position for surrounding the blind hole.

[0021] Preferably, the two inner inclined surfaces intersect each other and the intersection line is perpendicular to the center line of the blind hole.

[0022] Preferably, the outer side surface of the extension body has two outer inclined surfaces which are arranged opposite to each other with the hole center line of the blind hole as the center, and the two outer inclined surfaces are arranged in an "eight" shape.

[0023] Preferably, the outer bevel and the inner bevel on the same side are parallel to each other.

[0024] Preferably, the outer end surface of the extension body is a plane perpendicular to the center line of the blind hole.

[0025] Preferably, the liquid circuit sealing structure also includes a second seal located in the outer sleeve, the second seal is arranged back to back with the first end face of the inner sleeve, the second seal is also arranged in a stacked manner with the first seal, and the second seal is also provided with a connecting through hole, and the connecting through hole is opposite to the blind hole along the penetrating direction of the through channel.

[0026] Preferably, the liquid circuit sealing structure also includes an intermediate sealing ring located in the outer casing, the intermediate sealing ring is clamped between the first sealing member and the second sealing member along the penetration direction of the through channel, and the connecting through hole of the second sealing member is connected to the blind hole via the internal space of the intermediate sealing ring.

[0027] Preferably, the hysteroscope of the present invention also includes a distal end, which includes a distal end body, a distal end channel opened in the distal end body and passing through the first end face of the distal end body, a sleeve cavity opened in the distal end body and used to expand the distal end of the distal end channel adjacent to the first end face, and an annular sunken ring groove opened on the side wall of the distal end body; the distal end channel extends in a direction close to the second end face of the distal end body, and the distal end channel also passes through a side wall of the distal end body adjacent to the second end face, so that a distal end breach open from the side is surrounded on the side wall; the flat tube section of the inner tube is matingly inserted into the sleeve cavity; an outer tube breach extending along the length direction of the outer tube and passing through the end wall surface of the distal end of the outer tube is provided on the side wall of the distal end of the outer tube, and the outer tube breach is matingly engaged with the sunken ring groove.

[0028] Preferably, the tip further comprises an expansion notch opened in the tip body and used to expand the tip channel to the end of the second end face of the tip body, and the expansion notch also penetrates the second end face of the tip body and the one side wall.

[0029] Preferably, the end body has a curved surface for defining the expansion gap, the curved surface is arranged to be laterally convex toward the center direction of the second end face of the end body, and the curved surface is arranged to be convex toward the center direction of the second end face of the end body in the cross-sectional direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a stereoscopic view of the hysteroscope of the present invention.

[0031] Figure 2 yes Figure 1 Magnified view of part B.

[0032] Figure 3yes Figure 1 The hysteroscope is shown in a plan view from above.

[0033] Figure 4 is along Figure 3 Internal view of the section taken along the mid-CC line.

[0034] Figure 5 yes Figure 4 Enlarged view of part D.

[0035] Figure 6 yes Figure 4 Enlarged view of part E.

[0036] Figure 7 It is a perspective view of the insertion portion of the hysteroscope of the present invention.

[0037] Figure 8 yes Figure 7 Enlarged view of part F.

[0038] Fig. 9 yes Figure 7 Enlarged view of section G.

[0039] Fig.10 yes Figure 7 Plan view along the direction indicated by arrow A.

[0040] Fig.11 yes Figure 7 A perspective view of the inner tube in the insert is shown.

[0041] Fig.12 yes Fig.11 Magnified view of section H.

[0042] Fig.13 yes Fig.11 Enlarged view of part I.

[0043] Fig.14 yes Fig.11 A plan view of the inner tube is shown.

[0044] Fig.15 is along Fig.14 Internal view cut along the mid-JJ line.

[0045] Fig.16 is along Fig.14 Internal view cut along the KK line showing the inserted instrument.

[0046] Fig.17 is along Fig.14 The mid-LL line is cut and shows an internal view of the inserted instrument.

[0047] Fig.18It is a stereoscopic view of the outer casing of the liquid return mechanism in the hysteroscope of the present invention.

[0048] Fig.19 It is a plan view of the inner casing of the liquid return mechanism in the hysteroscope of the present invention viewed along the penetrating direction of the penetrating channel.

[0049] Fig. 20 is along Fig.19 Internal view of the mid-MM line section.

[0050] Fig.21 A three-dimensional view of the first sealing member of the fluid path sealing structure in the hysteroscope of the present invention.

[0051] Fig. 22 yes Fig.21 A perspective view of the first seal shown at another angle.

[0052] Fig.23 yes Fig.21 The first seal is shown in a plan view from front to back.

[0053] Fig.24 is along Fig.23 Internal view of the section taken along the midline NN.

[0054] Fig.25 It is a stereoscopic view of the tip of the hysteroscope of the present invention.

[0055] Fig.26 yes Fig.25 The tip is shown in a plan view viewed from the side.

[0056] Fig. 27 yes Fig.25 The tip is shown in plan view from front to back.

[0057] Fig.28 is along Fig. 27 Internal view cut along the midline OO.

[0058] Fig.29 yes Fig.25 A stereoscopic view of the tip shown at another angle. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with specific implementation examples and the accompanying drawings, and the technical solutions of the present invention are explained. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are explained to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. Embodiments of the present invention are now described with reference to the accompanying drawings, and similar element numbers in the accompanying drawings represent similar elements.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The hysteroscope 100 of the present invention comprises an insertion portion 10, a handle 20 and a liquid return mechanism 30. The liquid return mechanism 30 comprises an outer sleeve 31 fixed to the handle 20 and an inner sleeve 32 fitted inside the outer sleeve 31. Figure 5 As an example, the outer sleeve 31 and the inner sleeve 32 are also sealed in the lateral direction, specifically, the outer sleeve 31 and the inner sleeve 32 are sealed laterally by means of the first sealing ring 33, the second sealing ring 34 and the third sealing ring 35 described below, so as to better prevent the liquid from leaking from the gap between the outer sleeve 31 and the inner sleeve 32; in addition, the inner sleeve 32 has a through channel 323 (see FIG. 323 ) penetrating the first end face 321 and the second end face 322 of the inner sleeve 32. Fig. 20 ), the through channel 323 includes a first insertion cavity 3231 and a second insertion cavity 3232 that are connected to each other.

[0062] The insertion portion 10 comprises an outer tube 11 and an inner tube 12, each of which is in the shape of a long strip. The proximal end 11a of the outer tube 11 is inserted into the second insertion cavity 3232; the inner tube 12 is placed in the outer tube 11, and the proximal end 12a of the inner tube 12 also extends out of the proximal end 11a of the outer tube 11 and is inserted into the first insertion cavity 3231. Figure 5 As shown, the outer tube 11, the inner tube 12 and the inner sleeve 32 form a fluid flow loop for the fluid to enter and exit the uterine cavity. In addition, a notch 112 is provided on the side wall 111 of the proximal end 11a of the outer tube 11. The notch 112 extends along the length direction of the outer tube 11 where the notch 112 is located (see the direction indicated by arrow A and the opposite direction) and penetrates the end wall 113 of the proximal end 11a where the notch 112 is located. Fig. 9 A notch 122 is also provided on the side wall 121 of the proximal end 12a of the inner tube 12. The notch 122 also extends along the length direction of the inner tube 12 and penetrates the end wall 123 of the proximal end 12a. Fig. 9 Obviously, according to actual needs, it is also possible to open the gap 112 only in the outer tube 11 or the gap 122 in the inner tube 12, so it is not necessary to Fig. 9 Limits shown.

[0063] Recombination Fig. 20 , a lateral through hole 325 and a snap-fit ​​structure 326 protruding from the through channel 323 and used to snap-fit ​​with the notch 112 (122) are provided on the side wall 324 of the inner sleeve body 32, and the lateral through hole 325 also penetrates the snap-fit ​​structure 325 and communicates with the notch 112 (112); since the accompanying drawings show that the outer tube 11 is provided with a notch 112 and the inner tube 12 is provided with a notch 122, correspondingly, the snap-fit ​​structure 326 is respectively protruding from the first insertion cavity 3231 and the second insertion cavity 3232, and the snap-fit ​​structures 326 on the first insertion cavity 3231 and the second insertion cavity 3232 each correspond to a lateral through hole 325; such a design satisfies that the internal space of the inner tube 12 is communicated with the second channel 37 described below through the notch 122 on the inner tube 12 and the corresponding lateral through hole 325, and then the second channel 37 is connected to the liquid inlet external interface 312 (see FIG. 31 ) provided on the outer sleeve body 31 Fig.18 ) is required to be connected, and the gap between the outer tube 11 and the inner tube 12 is connected to the first channel 37 described below through the notch 112 on the outer tube 11 and the corresponding lateral through hole 325, and then the first channel 36 is connected to the liquid return external interface 313 (see Fig.18 )The need for connectivity.

[0064] Combined with Fig.11 , Fig.12 and Fig.14As an example, the distal end 12b of the inner tube 12 has a flat tube section 124, and the flatness of the flat tube section 124 changes in the direction away from the inner sleeve 32; alternatively, as an example, the flatness of the flat tube section 124 increases in the direction away from the inner sleeve 32; obviously, according to actual needs, the flatness of the flat tube section 124 can also be arranged to decrease in the direction away from the inner sleeve 32. It should be noted that the flatness at this time refers to the cross section 1241 of the flat tube section 124 (see Fig.16 ) in one direction to the other direction, for example, Fig.16 In the figure, flatness is the ratio of D1 to D2, that is, D1 divided by D2; since D1 is greater than D2, the value of flatness is greater than 1; the greater the ratio of D1 to D2, the greater the flatness. More specifically, as follows:

[0065] Combination Fig.11 , Fig.12 and Fig.14 As an example, the flat tube section 124 curves away from the inner sleeve 32 to form a curved structure, preferably a slightly curved structure, which allows the tube diameter to be thinner, while achieving a three-way comprehensive balance between a thinner tube diameter and better realization of the return water function and component layout; for example, Fig.10 In the embodiment, since the flat tube section 124 is displaced upward relative to the proximal end 12a of the inner tube 12, more sufficient space is left below the flat tube section 124 and the outer tube 11 for arranging components (such as a camera module), thus facilitating the assembly operation of the camera module. Fig.16 As an example, the cross section 1241 of the flat tube section 124 is in the flat direction (see Fig.16 The flat tube section 124 is asymmetrical in structure (in the vertical direction), and such a design makes one side of the flat tube section 124 flatter than the other side. Fig.16 The lower side of the flat pipe section 124 is made flatter relative to the upper side.

[0066] Recombination Fig.11 , Fig.12 and Fig.14 As an example, the distal end 12b of the inner tube 12 further has a flat straight tube section 125 connected to the end of the flat tube section 124; optionally, as an example, the flat straight tube section 125 and the flat tube section 124 together form an integrated structure to simplify the manufacturing process of the inner tube 12; in addition, with the help of the flat straight tube section 125, it is convenient for the inner tube 12 to be connected with the tip head 50 described below (see Fig.25 ) of the plug-in assembly; in addition, combined with Fig.17 As an example, the cross section 1251 of the flat straight tube section 125 is in the flat direction (see Fig.17The flat straight tube section 125 is an asymmetric structure in the vertical direction. This design makes one side of the flat straight tube section 125 flatter than the other side. Fig.17 The lower side of the flat straight tube section 125 is made flatter relative to the upper side. It is additionally explained that the flatness of the flat straight tube section 125 is the ratio of D3 to D4.

[0067] like Fig.15 As shown, as an example, the cross section 12c of the inner tube 12 located between the flat tube section 124 and the proximal end 12a of the inner tube 12 is a symmetrical structure to facilitate the manufacturing and processing of the inner tube 12; in addition, the cross section 12c is a circular ring, which can obviously be an elliptical ring or a regular polygonal ring according to actual needs, so it is not necessary to Fig.15 Limits shown.

[0068] like Fig. 9 As shown, as an example, the notch 122 on the inner tube 12 extends linearly along the length direction of the inner tube 12 to simplify the manufacturing process of the notch 122 on the inner tube 12; in addition, the side wall 121 of the proximal end 12a of the inner tube 12 is provided with an inclined surface 126 adjacent to the end wall surface 123 of the proximal end 12a and used to expand the notch 122, so as to improve the convenience of assembly and disassembly operations between the inner tube 12 and the inner sleeve body 32 by means of the design of the inclined surface 126. Specifically, Fig. 9 As an example, a curved transition surface 127 is provided on the side wall 121 of the proximal end 12a of the inner tube 12 for smoothly transitioning the end wall surface 123 of the proximal end 12a and the inclined surface 126, further improving the smoothness of the assembly and disassembly operation between the inner tube 12 and the inner sleeve body 32.

[0069] For example Fig. 9 As shown, as an example, the notch 112 on the outer tube 11 extends linearly along the length direction of the outer tube 11 to simplify the manufacturing process of the notch 112 on the outer tube 11; in addition, the side wall 111 of the proximal end 11a of the outer tube 11 is provided with an inclined surface 114 adjacent to the end wall surface 113 of the proximal end 11a and used to expand the notch 112, so as to improve the convenience of assembly and disassembly operations between the outer tube 11 and the inner sleeve 32 by means of the design of the inclined surface 114. Specifically, Fig. 9 As an example, a side wall 111 of the proximal end 11a of the outer tube 11 is provided with an arcuate transition surface 115 for smoothly transitioning the end wall surface 113 of the proximal end 11a and the inclined surface 114, further improving the smoothness of the assembly and disassembly operation between the outer tube 11 and the inner sleeve body 32.

[0070] like Figure 5As shown, as an example, the liquid return mechanism 30 further includes a first sealing ring 33, a second sealing ring 34 and a third sealing ring 35 which are arranged in a spaced relationship along the through direction (indicated by arrow A) of the through channel 323. The first sealing ring 33, the second sealing ring 34, the outer casing 31 and the inner casing 32 together enclose a first channel 36, and the second sealing ring 34, the third sealing ring 35, the outer casing 31 and the inner casing 32 together enclose a second channel 37. Figure 5 As shown. In addition, Fig. 20 Since the engaging structures 326 are respectively protruded in the first insertion cavity 3231 and the second insertion cavity 3232, and the engaging structures 326 on the first insertion cavity 3231 and the second insertion cavity 3232 respectively correspond to the lateral through holes 325; therefore, the lateral through holes 325 corresponding to the engaging structures 325 on the first insertion cavity 3231 (see Fig. 20 The lateral through hole 325 at the right position in the middle) connects the first channel 36 with the notch 122 on the inner tube 12; the lateral through hole 325 corresponding to the snap-fit ​​structure 326 on the second insertion cavity 3232 (see Fig. 20 The lateral through hole 325 at the left side of the middle makes the second channel 37 communicate with the notch 112 on the outer tube 11. The purpose of this design is to allow the liquid from the outside to enter the second channel 37 from the liquid inlet external interface 312 of the outer shell 31 to first flow into the uterine cavity from the inner tube 12 of the insertion part 10 to perform corresponding treatment operations on the uterine cavity; and the treated liquid then flows back from the outer tube 11 of the insertion part 10 to the first channel 36, and then flows out from the liquid return external interface 313 of the outer shell 31, so as to achieve the purpose of external liquid entering and flowing out of the uterine cavity. In addition, combined with Fig.18 As an example, the outer casing 31 is a cylindrical structure, the closed end 31a of the cylindrical structure is arranged opposite to the first end surface 321 of the inner casing 32, and the closed end 31a is provided with an instrument inlet and outlet channel 311 extending along the through direction of the through channel 323, so as to facilitate the external instrument 200 (see Fig.16 and Fig.17 ) Operation of entering and exiting the hysteroscope 100 of the present invention from the instrument entry and exit channel 311.

[0071] Combination Figure 4 , Figure 5 and Fig. 22As an example, the hysteroscope 100 of the present invention also includes a liquid circuit sealing structure 40, which includes a first sealing member 41 located in the outer sleeve 31 and sealingly matched with the first end face 321 of the inner sleeve 32, the first sealing member 41 has a sealing body 411 for sealingly matching with the first end face 321 of the inner sleeve 32, an extension body 412 extending from the sealing body 411 and extending into the through channel 323 and having a conical shape, and a blind hole 413 simultaneously opened in both the extension body 412 and the sealing body 411, the orifice 4131 of the blind hole 413 is located on the end face 4121 of the sealing body 411 facing away from the extension body 412; so as to facilitate the operation of an external instrument 200 entering the blind hole 413 from the orifice 4131 and then penetrating into the through channel 323 from the extension body 412, so as to meet the need of inserting the instrument 200 into the inner tube 12. Among them, the first sealing member 40 includes a sealing body 411 and a tapered extension body 412 extending from the sealing body 411 and extending into the through channel 323, so that the device 200 passing through the extension body 412 can be better sealed from the side, thereby improving the sealing effect; on the other hand, the tapered extension body 412 plays a guiding role during the insertion of the device 200, thereby improving the smoothness of insertion and removal. In addition, the more specific structure of the liquid path sealing structure 40 is described below.

[0072] like Figure 5As shown, as an example, the liquid circuit sealing structure 40 also includes a second sealing member 42 and an intermediate sealing ring 43 located in the outer sleeve 31. The second sealing member 42 is arranged opposite to the first end face 321 of the inner sleeve 32, and the second sealing member 42 is also arranged in a stacked manner with the first sealing member 41; the second sealing member 42 is also provided with a connecting through hole 421, and the connecting through hole 421 is opposite to the blind hole 413 along the through direction of the through channel 323 (as indicated by arrow A) and is connected to each other; and the intermediate sealing ring 43 is sandwiched between the first sealing member 41 and the second sealing member 42 along the through direction of the through channel 323, and the connecting through hole 421 of the second sealing member 42 is connected to the blind hole 413 by means of the internal space 431 of the intermediate sealing ring 43; therefore, with the introduction of the intermediate sealing ring 43, a rebound space is provided for the second sealing member 42 after the external device 200 is pulled out, so that the rebound reset of the second sealing member 42 is more convenient. It should be noted that, according to actual needs, the liquid circuit sealing structure 40 can also be designed to include only the first sealing member 41, or only the first sealing member 41 and the second sealing member 42; when the liquid circuit sealing structure 40 includes only the first sealing member 41, the first sealing member 41 is directly clamped by the closed end 31a of the outer sleeve 31 and the inner sleeve 32 in the penetration direction of the through-channel 323; when the liquid circuit sealing structure 40 includes only the first sealing member 41 and the second sealing member 42, the first sealing member 41 and the second sealing member 42 are directly clamped by the closed end 31a of the outer sleeve 31 and the inner sleeve 32 in the penetration direction of the through-channel 323; when the liquid circuit sealing structure 40 includes the first sealing member 41, the second sealing member 42 and the intermediate sealing ring 43, at this time, the first sealing member 41, the intermediate sealing ring 43 and the second sealing member 42 are clamped by the closed end 31a of the outer sleeve 31 and the inner sleeve 32 in the penetration direction of the through-channel 323; therefore, it is not necessary to Figure 5 Limits shown.

[0073] Combination Fig. 22 and Fig.24 As an example, the extension body 412 has two inner inclined surfaces 4121 arranged opposite to each other with the hole center line C1 of the blind hole 413 as the center at the position of the blind hole 413. This design makes the extension body 412 have a better sealing effect on the instrument 200 passing through the extension body 412, and on the other hand, provides a better guiding effect during the process of the instrument 200 passing through, thereby effectively improving the smoothness of the insertion and removal of the instrument 200. Optionally, Fig.24 As an example, the two inner inclined surfaces 4121 are symmetrically arranged with the hole center line C1 of the blind hole 413 as the center; in addition, the two inner inclined surfaces 4121 intersect each other and the intersection line 4122 is perpendicular to the hole center line C1 of the blind hole 413, as shown in FIG. Fig. 22 and Fig.24 As shown; this design can further improve the sealing effect and the smoothness of plugging and unplugging.

[0074] Combination Fig.21 , Fig.23 and Fig.24 As an example, the outer side surface of the extension body 412 has two outer inclined surfaces 4123 arranged opposite to each other with the hole center line C1 of the blind hole 413 as the center, and the two outer inclined surfaces 4123 are arranged in an "eight" shape; such a design can thin the extension body 412, so that the instrument 200 can save more effort when passing through the extension body 412. Specifically, Fig.24 As an example, the same side (see Fig.24 The outer bevel 4123 and the inner bevel 4121 are parallel to each other to ensure the thickness consistency between the outer bevel 4123 and the inner bevel 4121 of the extension body 412. Fig.24 As an example, the outer end surface 4124 of the extension body 412 is a plane perpendicular to the hole center line C1 of the blind hole 413. This design is used to ensure that the external instrument 200 can be inserted and removed from the extension body 412 in a direction perpendicular to the outer end surface 4124 (i.e., in the direction of the hole center line C1), thereby more effectively improving the smoothness of the insertion and removal of the instrument 200 from the extension body 412. Fig.24 As an example, the center line of the sealing body 411 coincides with the center line C1 of the blind hole 413 to facilitate the manufacturing of the first sealing member 41 .

[0075] like Figure 1 , Figure 3 and Figure 4 As shown, as an example, the hysteroscope 100 of the present invention further includes a tip 50, and then combined with Figure 2 , Figure 6 , Fig.25 and Fig.26 The first end 50 includes an end body 51 and an end channel 52 opened in the end body 51; the end body 51 has a first end face 511 and a second end face 512 arranged opposite to each other. The end channel 52 penetrates the first end face 511 of the end body 51, and extends toward the direction close to the second end face 512 of the end body 51. The end channel 52 also penetrates a side wall 513 of the end body 51 adjacent to the second end face 512, so that a side end opening 514 is formed on the side wall 513 and is open from the side. Therefore, under the action of the end opening 514, the instrument 200 extending from the end channel 52 to the end body 51 is not restricted by the side wall 513 where the end opening 514 is located, so that the instrument 200 extending from the end channel 52 to the end body 51 can move unconstrained on the side wall 513, thereby making the operation space of the instrument 200 large. In addition, the more specific structure of the tip 50 is described below:

[0076] like Figure 2 and Fig.25 As shown, as an example, the tip 50 further includes an expansion notch 55 opened in the tip body 51, and the expansion notch 55 is used to expand the end of the tip channel 52 adjacent to the second end surface 512, and the expansion notch 55 also penetrates the second end surface 512 and the side wall 513; therefore, with the help of the expansion notch 55, on the one hand, the movement range of the instrument 200 extending from the tip body 51 can be increased, and on the other hand, it is more convenient to extend the instrument 200 from the tip body 51 or pull it out from the tip body 51. Specifically, in combination with Fig.25 and Fig.26 As an example, the end body 51 has a curved surface 515 for defining the expansion gap 55, and the curved surface 515 is arranged to be laterally convex toward the center direction C2 of the second end surface 512 close to the end body 51, for example, Fig.26 In the embodiment, the curved surface 515 is arranged to be upwardly convex toward the center direction C2 of the second end surface 512 close to the end body 51, so that Fig.26 The instrument 200 extending from the end body 51 can also bend downward to further increase the range of motion of the instrument 200 extending from the end body 51 and effectively reduce damage to the human body; Fig. 27 As an example, the curved surface 515 is in the cross-sectional direction (i.e. Fig. 27 In the plane direction where the device 200 is located, it is arranged to protrude in the center direction C2 of the second end surface 512 close to the end body 51, so that it can provide a guiding effect for the device 200 during the process of the device 200 extending out of the end body 51.

[0077] Combination Figure 6 , Fig.28 and Fig.29 As an example, the tip 50 further includes a sleeve cavity 53 opened in the tip body 51, and the sleeve cavity 53 is used to expand the tip channel 52 adjacent to the end of the first end surface 511 of the tip body 51; the flat straight tube section 125 of the inner tube 12 is inserted into the sleeve cavity 53 in a matching manner; so as to improve the assembly reliability of the tip body 51 and the distal end 12b of the inner tube 12. Specifically, Fig.29 In the embodiment, as an example, the sleeve cavity 53 is flat, and the position 521 of the end channel 52 for corresponding communication with the sleeve cavity 53 is flat, so as to better match the profile of the distal end 12b of the inner tube 12. It is understandable that when the distal end 12b of the inner tube 12 does not have the flat straight tube section 125, the flat tube section 124 is inserted into the sleeve cavity 53 in a matching manner, so it is not necessary to Figure 6 Limits shown.

[0078] Combination Fig.26 and Fig.29 As an example, the front end 50 further includes an annular sinking groove 54 formed on the side wall of the end body 51; Figure 8The side wall of the distal end 11b of the outer tube 11 is provided with an outer tube break 117 extending along the length direction of the outer tube 11 and penetrating the end wall surface 116 of the distal end 11b of the outer tube 11. The outer tube break 117 is engaged with the sinking annular groove 54. Figure 2 so that the assembled end body 51 and the distal end 11b of the outer tube 11 are flush with each other in the lateral direction, avoiding the uneven defects in the lateral direction, thus making the front end 50 neater. Specifically, combined with Fig.26 and Fig.29 As an example, the sinking annular groove 54 includes a first groove section 541 adjacent to the first end surface 511 of the end body 51, a second groove section 542 adjacent to the second end surface 512 of the end body 51, and a third groove section 543 connected between the first groove section 541 and the second groove section 542. The second groove section 542 and the third groove section 543 are both arranged opposite to the end opening 514, and the first groove section 541 is arranged on the same side as the end opening 514. For example, Fig.26 In the embodiment, the first groove section 541 and the end opening 514 are both arranged upward. Fig.26 As an example, the first groove section 541 and the second groove section 542 are both curved, and the third groove section 543 is straight; such a design can increase the engagement circumference between the terminal body 51 and the distal end 11b of the outer tube 11, thereby improving the stability of the assembly between the terminal body 51 and the distal end 11b of the outer tube 11.

[0079] Combination Figure 2 , Figure 6 and Figure 8 As an example, a water return hole 118a and a filling hole 118b are provided on the side wall of the distal end 11b of the outer tube 11, which are arranged opposite to the outer tube rupture 117, so that the liquid in the uterine cavity can be refluxed by means of the water return hole 118a, and the glue can be poured into the distal end 11b of the outer tube 11 by means of the filling hole 118b, so as to better fix the tip 50 and the distal end 11b of the outer tube 11 together; optionally, in combination with Figure 2 , Figure 6 and Figure 8 As an example, the water return holes 118a are in two groups, and the filling holes 118b are in one group. The water return holes 118a are located between the filling holes 118b and the notch 112 of the outer tube 11, but this is not limited thereto.

[0080] Compared with the prior art, the proximal end 11a (12a) of the outer tube 11 and / or the inner tube 12 is provided with a notch 112 (122) on the side wall 111 (121), and the notch 112 (122) extends along the length direction of the outer tube 11 or the inner tube 12 where the notch 112 (122) is located and penetrates the end wall surface 113 (123) of the proximal end 11a (12a) where the notch 112 (122) is located. After being inserted into the inner sleeve body 32, the notch 112 (122) is engaged by the engaging structure 325 and cannot rotate relative to the inner sleeve body 32, so that the outer tube 11 or the inner tube 12 where the notch 112 (122) is located is in a position that is correctly connected to the inner sleeve body 32, thereby simplifying the assembly process; in addition, with the help of the notch 112 (122), the inner sleeve body 32 and the outer tube 11 or the inner tube 12 where the notch 112 (122) is located can communicate with the liquid. At the same time, with the help of the flat tube section 124 with a flatness that changes in the direction away from the inner sleeve body 32 at the distal end 12b of the inner tube 12, there is a more sufficient gap between the flat tube section 124 and the instrument 200 and between the flat tube section 124 and the distal end 11b of the outer tube 11, thereby solving the defect of insufficient liquid communication gap.

[0081] It is worth noting that the distal ends 11b (12b) of the outer tube 11 and the inner tube 12 refer to the ends away from the handle 20, while the proximal ends 11a (12a) of the outer tube 11 and the inner tube 12 refer to the ends close to the handle 20. In addition, when the second sealing member 42 needs to seal the external device 200 passing through the connecting through hole 421, the external device 200 inserted in the through hole 421 can be made to have an interference fit with the connecting through hole 421. Finally, the liquid mentioned above can be liquid water but is not limited thereto.

[0082] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. At the same time, what is disclosed above is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A hysteroscope, comprising an insertion portion, a handle and a liquid return mechanism; the liquid return mechanism comprises an outer sleeve fixed to the handle and an inner sleeve fitted inside the outer sleeve, the inner portion of the inner sleeve having a through passage penetrating through a first end face and a second end face of the inner sleeve, the through passage comprising a first insertion cavity and a second insertion cavity connected to each other; the insertion portion comprises an outer tube and an inner tube, each of which is an elongated strip, the proximal end of the outer tube being inserted into the second insertion cavity, the inner tube being placed inside the outer tube, the proximal end of the inner tube also extending out of the proximal end of the outer tube and being inserted into the first insertion cavity; characterized in that A notch is provided on the side wall of the proximal end of the outer tube and / or the inner tube, and the notch extends along the length direction of the outer tube or the inner tube where the notch is located and penetrates the end wall surface of the proximal end where the notch is located; a lateral through hole and a clamping structure protruding in the through channel and used for clamping with the notch are provided on the side wall of the inner sleeve body, and the lateral through hole also penetrates the clamping structure and is connected with the notch; the distal end of the inner tube has a flat tube section, and the flatness of the flat tube section is arranged to change in the direction away from the inner sleeve body.

2. The hysteroscope according to claim 1, characterized in that: The flatness of the flat tube segment is arranged to increase in a direction away from the inner sleeve body; the flat tube segment curves away from the inner sleeve body to form a curved structure; the cross-section of the inner tube located between the proximal end of the inner tube and the flat tube segment is a symmetrical structure, and the cross-section of the flat tube segment in the flattening direction is an asymmetrical structure.

3. The hysteroscope according to claim 1, characterized in that: The distal end of the inner tube also has a flat straight tube section connected to the end of the flat tube section; the cross section of the flat straight tube section is an asymmetric structure in the flat direction.

4. The hysteroscope according to claim 1, characterized in that: The side wall of the proximal end of the outer tube or the inner tube where the notch is located is also provided with an inclined surface adjacent to the end wall surface and used to expand the notch, and an arc-shaped transition surface used to make a smooth transition between the end wall surface and the inclined surface.

5. The hysteroscope according to claim 1, characterized in that: The liquid return mechanism further comprises a first sealing ring, a second sealing ring and a third sealing ring which are arranged on the outer sleeve and spaced apart along the through direction of the through passage, wherein the first sealing ring, the second sealing ring, the outer sleeve and the inner sleeve together enclose a first passage, and the second sealing ring, the third sealing ring, the outer sleeve and the inner sleeve together enclose a second passage; the engaging structures are respectively convexly arranged in the first insertion cavity and the second insertion cavity, and the engaging structures on the first insertion cavity and the second insertion cavity each correspond to the lateral through hole; The lateral through hole corresponding to the snap-fit ​​structure on the first insertion cavity enables the first channel to communicate with the notch on the inner tube; the lateral through hole corresponding to the snap-fit ​​structure on the second insertion cavity enables the second channel to communicate with the notch on the outer tube.

6. The hysteroscope according to claim 5, characterized in that: The outer sleeve is a cylindrical structure, the closed end of the cylindrical structure is arranged opposite to the first end face of the inner sleeve, and the closed end is penetrated by a device entry and exit channel extending along the penetration direction of the through channel.

7. The hysteroscope according to claim 1, characterized in that: It also includes a liquid circuit sealing structure, which includes a first sealing member located in the outer sleeve and sealingly matched with the first end face of the inner sleeve, the first sealing member has a sealing body for sealingly matching with the first end face of the inner sleeve, an extension body extending from the sealing body and extending into the through channel and having a conical shape, and a blind hole simultaneously opened in both the extension body and the sealing body, the orifice of the blind hole being located on the end face of the sealing body facing away from the extension body.

8. The hysteroscope according to claim 7, characterized in that: The extension body has two inner bevels arranged opposite to each other with the center line of the blind hole as the center at the position for enclosing the blind hole; the two inner bevels intersect each other and the intersection line is perpendicular to the center line of the blind hole; the outer side surface of the extension body has two outer bevels arranged opposite to each other with the center line of the blind hole as the center, and the two outer bevels are arranged in an "eight" shape; the outer bevel and the inner bevel on the same side are parallel to each other; the outer end surface of the extension body is a plane perpendicular to the center line of the blind hole.

9. The hysteroscope according to claim 7, characterized in that: The liquid circuit sealing structure also includes a second seal and an intermediate sealing ring located in the outer sleeve; the second seal is arranged back to back with the first end face of the inner sleeve, and the second seal is also arranged in a stacked manner with the first seal, and the second seal is also provided with a connecting through hole, and the connecting through hole is opposite to the blind hole along the penetration direction of the through channel; the intermediate sealing ring is clamped between the first seal and the second seal along the penetration direction of the through channel, and the connecting through hole of the second seal is connected with the blind hole by means of the internal space of the intermediate sealing ring.

10. The hysteroscope according to claim 1, characterized in that: The terminal head also includes a terminal body, a terminal channel opened in the terminal body and penetrating the first end face of the terminal body, a sleeve cavity opened in the terminal body and used to expand the end of the terminal channel adjacent to the first end face, an annular sunken ring groove opened on the side wall of the terminal body, and an expansion notch opened in the terminal body and used to expand the end of the terminal channel adjacent to the second end face of the terminal body; the terminal channel extends in a direction close to the second end face of the terminal body, and the terminal channel also penetrates a side wall of the terminal body adjacent to the second end face, so that the side wall surrounds a A laterally open end breach; the expanded breach also penetrates the second end face of the end body and the side wall of one side; the end body has a curved surface for defining the expanded breach, the curved surface is arranged to convex laterally toward the center direction of the second end face of the end body, and the curved surface is arranged to convex toward the center direction of the second end face of the end body in the cross-sectional direction; the flat tube section of the inner tube is fittedly inserted into the sleeve cavity; an outer tube breach is provided on the side wall of the distal end of the outer tube, extending along the length direction of the outer tube and penetrating the end wall surface of the distal end of the outer tube, and the outer tube breach is fitted in engagement with the sinking annular groove.

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