Hysteroscope and liquid path sealing structure thereof

Abstract

The utility model discloses a hysteroscope and a liquid path sealing structure thereof, the liquid path sealing structure is arranged at the position of a liquid return mechanism of the hysteroscope, the liquid return mechanism comprises an outer sleeve body and an inner sleeve body sleeved in the outer sleeve body, and a through channel penetrating through a first end face and a second end face of the inner sleeve body is arranged in the inner sleeve body. The liquid path sealing structure comprises a first sealing piece and a second sealing piece which are sleeved in the outer sleeve body in a sealing fit mode, the first sealing piece is further in sealing fit with the first end face of the inner sleeve body, and the second sealing piece is opposite to the first end face of the inner sleeve body and is stacked with the first sealing piece. A first groove and a second groove are formed in the first sealing piece, the first groove and the penetrating channel are arranged in a face-to-face mode, the first groove is further communicated with the penetrating channel, the second groove and the second sealing piece are arranged in a face-to-face mode, and the second groove is further not communicated with the first groove; a through hole opposite to the second groove and communicated with the second groove is formed in the second sealing piece; therefore, the sealing performance is stable and reliable, and the plugging smoothness of the instrument is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of medical instruments, in particular to a kind of hysteroscope and its liquid path sealing structure. BACKGROUND

[0002] Due to shorter recovery time, shorter duration of surgery and low cost, minimally invasive surgical procedures have become increasingly common in the field of surgical procedures. Minimally invasive surgical procedures are typically performed by inserting instruments through small access ports or artificially formed openings in patients. Hysteroscopy is one of them, hysteroscopy, mainly applied in gynecology, such as fine needle puncture of ovarian cyst, separation of pelvic adhesion, treatment of tubal obstruction, distortion and adhesion, ectopic pregnancy surgery, uterine fibroid removal, gynecological tumor surgery, subtotal hysterectomy and total hysterectomy for benign diseases, etc. Water passage under hysteroscopy is a technique that operates through water flow guided by hysteroscopy. In this technique, the physician will insert the hysteroscope into the vagina of the female, and through visual guidance, water flow is injected into the uterine cavity to clean the foreign matter or lesion site in the uterine cavity, or to assist in uterine cavity surgery. This method has the advantages of being intuitive and accurate, and can clearly observe the situation in the uterine cavity, and the operation is relatively safe. Therefore, hysteroscope needs to be equipped with waterway.

[0003] However, in the existing hysteroscope, due to the unreasonable design of the sealing structure of the waterway, there is a risk of water leakage in the process of the external instrument passing through the sealing structure from the instrument port of the handle to the insertion part, and there is also the defect of poor instrument insertion and removal smoothness.

[0004] Therefore, a hysteroscope and its liquid path sealing structure are needed to overcome the above-mentioned defects. UTILITY MODEL CONTENT

[0005] The purpose of the utility model is to provide a liquid path sealing structure of hysteroscope to ensure stable and reliable sealing performance and good instrument insertion and removal smoothness.

[0006] Another purpose of the utility model is to provide a hysteroscope to ensure stable and reliable sealing performance and good instrument insertion and removal smoothness.

[0007] To achieve the above-mentioned purpose, the liquid path sealing structure of the hysteroscope of the present invention is provided at the liquid return mechanism of the hysteroscope. The liquid return mechanism comprises an outer shell and an inner shell that fits inside the outer shell, the interior of the inner shell having a through-channel that passes through the first end face and the second end face of the inner shell. The liquid path sealing structure comprises a first seal and a second seal that fit inside the outer shell in a sealing manner, the first seal also sealingly fits with the first end face of the inner shell, the second seal faces away from the first end face of the inner shell and is stacked with the first seal; the first seal is provided with a first groove and a second groove that correspond to the through-channel along the through-channel direction, the first groove is arranged facing the through-channel, the first groove is also connected to the through-channel, the second groove is arranged facing the second seal, and the second groove is also not connected to the first groove; the second seal is provided with a through hole, the through hole is arranged opposite to and communicates with the second groove along the through-channel direction.

[0008] Preferably, projections of the first groove and the second groove in the thickness direction of the first sealing member are arranged crosswise.

[0009] Preferably, the projections of the first groove and the second groove in the thickness direction of the first sealing member are arranged in a cross shape.

[0010] Preferably, the first groove and the second groove are both straight grooves; and the distance between the first groove and the second groove ranges from 0.2 to 0.8 mm.

[0011] Preferably, the through hole of the second sealing member is a circular hole.

[0012] Preferably, the liquid circuit sealing structure of the present invention also includes an intermediate sealing ring located in the inner sleeve and clamped between the first sealing member and the second sealing member along the penetration direction of the through channel, and the through hole of the second sealing member is connected to the second groove via the internal space of the intermediate sealing ring.

[0013] Compared to the prior art, the through hole in the second seal cooperates with the first and second grooves in the first seal, which are arranged in opposite directions and are not interconnected. This reduces the thickness of the first seal where external instruments are inserted and removed. This ensures a good seal both after insertion and removal of external instruments, while also ensuring smooth insertion and removal of external instruments. Furthermore, the fluid path sealing structure of the present invention has the advantage of being simple in structure.

[0014] To achieve the above-mentioned objectives, the hysteroscope of the present invention comprises a handle, an insert portion whose proximal end is mounted on the handle, a liquid return mechanism mounted on the handle, and the aforementioned liquid circuit sealing structure. The liquid return mechanism comprises an outer shell fixed to the handle and an inner shell fitted within the outer shell, the inner shell having a through passage extending through the first and second end surfaces of the inner shell, and the proximal end of the insert portion is further mounted within the through passage.

[0015] Compared with the prior art, since the hysteroscope of the present invention includes the aforementioned liquid path sealing structure, the hysteroscope of the present invention also has the aforementioned beneficial effects.

[0016] Preferably, the through channel is trumpet-shaped at a position adjacent to the first end surface of the inner sleeve.

[0017] Preferably, the liquid return mechanism further includes a first sealing ring and a second sealing ring which are arranged on the outer sleeve of the inner sleeve and are spaced apart along the penetrating 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 first sealing member, the outer sleeve and the inner sleeve together enclose a second channel. The side wall of the inner sleeve is provided with a first side hole for connecting the first channel with the through channel and a second side hole for connecting the second channel with the through channel.

[0018] Preferably, the outer shell is bent radially inward at the end away from the insertion portion to form a blocking ring, and the outer shell is equipped with an instrument guide extending from the blocking ring to the outer shell, and the instrument guide has a guide opening extending therethrough, and the guide opening corresponds to the through hole along the penetrating direction of the through channel, and the instrument guide is also clamped between the second sealing member and the blocking ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure shows the interior of a hysteroscope having a fluid path sealing structure according to the present invention, cut along upper and lower planes passing through the center line of the insertion portion.

[0020] Figure 2 yes Figure 1 Internal view of the liquid return mechanism and liquid circuit sealing structure assembled together.

[0021] Figure 3 yes Figure 2 Internal view of the first seal in .

[0022] Figure 4 yes Figure 3 A perspective view of the first seal is shown.

[0023] Figure 5 yes Figure 4 The first sealing member is shown in a plan view along its thickness direction.

[0024] Figure 6 yes Figure 2 A perspective view of the second seal in FIG.

[0025] Figure 7 yes Figure 6 The second sealing member is shown in a plan view along its thickness direction.

[0026] Figure 8 yes Figure 2 A three-dimensional view of the inner sleeve in FIG. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with specific implementation examples and the accompanying drawings, and the technical solutions of the utility model 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 this field without making creative work are within the scope of protection of this application. The specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Many specific details are explained in the following description to facilitate a full understanding of the utility model. However, the utility model 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 utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The embodiments of the utility model are now described with reference to the accompanying drawings, and similar element numbers in the accompanying drawings represent similar elements.

[0028] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0029] See also Figure 1 and Figure 2 The hysteroscope 100 of the present invention comprises a liquid path sealing structure 10, a handle 20, an inserting portion 30 and a liquid return mechanism 40. The liquid return mechanism 40 is assembled at the handle 20, and the handle 20 provides a place for assembling the liquid return mechanism 40; Figure 1As an example, the liquid return mechanism 40 is built into the handle 20, and the handle 20 hides the liquid return mechanism 40, thereby making the appearance of the hysteroscope 100 of the present invention more concise; obviously, according to actual needs, the relationship between the liquid return mechanism 40 and the handle 20 can also be other, so it is not used in this example. Figure 1 At the same time, the liquid return mechanism 40 comprises an outer casing 41 fixed to the handle 20 and an inner casing 42 fitted within the outer casing 41, a reliable option is, Figure 1 and Figure 2 As an example, the outer sleeve 41 and the inner sleeve 42 are also sealed laterally, specifically by means of the first seal 11, the second seal 12, the first sealing ring 43, and the second sealing ring 44 described below, to better prevent liquid leakage from the gap between the outer sleeve 41 and the inner sleeve 42. The inner sleeve 42 has a through-channel 423 extending through the first end face 421 and the second end face 422 of the inner sleeve 42. The proximal end 31 of the insertion portion 30 is assembled on the handle 20 and is also assembled in the through-channel 423 to meet the need for external instruments to enter the proximal end 31 of the insertion portion 30 through the through-channel 423. It should be noted that the proximal end 31 of the insertion portion 30 herein refers to the end of the insertion portion 30 close to the handle 20, and the distal end 32 of the insertion portion 30 refers to the end away from the handle 30. In addition, since the specific structures of the insertion portion 30 and the handle 20 are well known in the art, they will not be described in detail here. More specifically, as follows:

[0030] like Figures 1 to 2 As shown, as an example, the fluid circuit sealing structure 10 includes a first seal 11 and a second seal 12 that are sealed and fitted within an outer sleeve 41. The first seal 11 also seals and fits with the first end surface 421 of the inner sleeve 42 to prevent liquid from leaking between the first seal 11 and the first end surface 421 of the inner sleeve 42. The second seal 12 faces away from the first end surface 421 of the inner sleeve 42 and is stacked with the first seal 11 to ensure that external instruments pass through the second seal 12 before passing through the first seal 11 during insertion.

[0031] Among them, the first sealing member 11 is provided with a first groove 111 and a second groove 112 corresponding to the through channel 423 along the through direction of the through channel 423 (see double arrow A), the first groove 111 is arranged facing the through channel 423, and the first groove 111 is also connected to the through channel 423; the second groove 112 is arranged facing the second sealing member 12, and the second groove 112 is not connected to the first groove 111, so that the position 113 of the first sealing member 11 where the external instrument is inserted and removed is thinned by means of the second groove 112 and the first groove 111 (see Figure 3), thereby ensuring that external instruments have good sealing performance after insertion and removal. The second sealing member 12 is provided with a through hole 121, which is arranged opposite to and communicates with the second groove 112 along the through direction of the through channel 423, to ensure that external instruments can be correctly inserted into the position 113 of the first sealing member 11 thinned by the first groove 111 and the second groove 112 along the through hole 121 of the second sealing member 12, thereby improving the reliability and smoothness of the insertion and removal operation of external instruments in the hysteroscope 100 of the present invention. Specifically, Figure 5 As an example, the projections of the first groove 111 and the second groove 112 in the thickness direction of the first seal 11 are arranged crosswise. Figure 5 In the thickness direction of the first seal 11, the projections of the first groove 111 and the second groove 112 are arranged in a cross shape. This design makes the position 113 of the first seal 11 where external instruments are inserted and removed exactly at the overlap of the first groove 111 and the second groove 112, thereby more effectively thinning the position 113, further improving the smoothness of the insertion and removal operation of external instruments, as well as the sealing reliability after insertion and removal. More specifically, Figures 3 to 5 As an example, the first groove 111 and the second groove 112 are both straight grooves, so as to facilitate the manufacturing and processing of the first groove 111 and the second groove 112 at the first sealing member 11; obviously, according to actual needs, the shapes of the first groove 111 and the second groove 112 at the first sealing member 11 can also be other, so it is not used herein. Figures 3 to 5 The following are the limits. Figure 3 As an example, the distance D between the first groove 111 and the second groove 112 ranges from 0.2 to 0.8 mm, so that the distance D is smaller than the groove depth P1 of the first groove 111 and smaller than the groove depth P2 of the second groove 112. That is, the thickness of the position where the first seal 11 separates the first groove 111 and the second groove 112 (for example, the position 113 for plugging and unplugging external instruments) is much smaller than the groove depth P1 of the first groove 111 and the groove depth P2 of the second groove 112, so that the smoothness of plugging and unplugging external instruments at the position 113 can be further improved, and the sealing reliability of the position 113 after the external instrument is inserted or unplugged can be effectively improved.

[0032] like Figure 6 and Figure 7 As shown, as an example, the through hole 121 of the second sealing member 12 is a circular hole, so that the through hole 121 is easy to be processed and manufactured at the second sealing member 12, and it is also easy to insert or remove the second sealing member 12 along the through hole 121 by external instruments; obviously, according to actual needs, the shape of the through hole 121 of the second sealing member 12 can also be other, so it is not shown in FIG. Figure 6 and Figure 7It should be noted that, since the second sealing member 12 also needs to seal the external device passing through the through hole 121 , the external device passing through the through hole 121 is made to have an interference fit with the through hole 121 .

[0033] like Figure 1 and Figure 2 As shown, as an example, the liquid circuit sealing structure 10 further includes an intermediate sealing ring 13 located in the inner sleeve 42 and sandwiched between the first sealing member 11 and the second sealing member 12 along the penetration direction of the through channel 423. The through hole 121 of the second sealing member 12 is connected to the second groove 112 by means of the internal space 131 of the intermediate sealing ring 13; therefore, with the introduction of the intermediate sealing ring 13, a rebound space is provided for the first sealing member 11 and the second sealing member 12 after the external instrument is pulled out, thereby better facilitating the rebound and reset of the first sealing member 11 and the second sealing member 12.

[0034] Another example Figure 1 and Figure 2 As shown, as an example, the position 4231 of the through-channel 423 adjacent to the first end face 421 of the inner sleeve 42 is trumpet-shaped, so that the external instrument passing through the position 113 of the first sealing member 11 can more smoothly enter the proximal end 31 of the insertion portion 30 by means of the trumpet shape. In addition, the end of the outer sleeve 41 away from the insertion portion 30 is radially bent inward to form a blocking ring 411. The outer sleeve 41 is equipped with an instrument guide 47 extending from the blocking ring 411 to the outer sleeve 41. The instrument guide 47 is provided with a guide port 471 extending therethrough. The guide port 471 corresponds to the through hole 121 along the through-channel 423. The instrument guide 47 is also sandwiched between the second sealing member 12 and the blocking ring 411. Figure 1 and Figure 2 As shown, it is possible to better introduce external instruments into the hysteroscope 100 of the present invention for insertion and removal operations.

[0035] For example Figure 1 and Figure 2 As shown, as an example, the liquid return mechanism 40 further includes a first sealing ring 43 and a second sealing ring 44 that are arranged in a spaced relationship along the through-going direction of the through-channel 423. The first sealing ring 43, the second sealing ring 44, the outer casing 41 and the inner casing 42 together enclose a first channel 45; the second sealing ring 44, the first sealing element 11, the outer casing 41 and the inner casing 42 together enclose a second channel 46. The side wall 424 of the inner casing 42 is provided with a first side hole 425 (see FIG. 1 ) for connecting the first channel 45 with the through-channel 423. Figure 8) and a second side hole 426 for connecting the second channel 46 with the through channel 423; the purpose of this design is to allow the liquid from the outside to enter the second channel 46 from the second interface 413 of the outer shell 41 to first flow into the uterine cavity from the inner tube 30a of the insertion part 30, so as to perform corresponding treatment operations on the uterine cavity; and the treated liquid will then flow back to the first channel 45 from the outer tube 30b of the insertion part 30, and then flow out from the first interface 412 of the outer shell 41, thereby achieving the purpose of external liquid entering and flowing out of the uterine cavity.

[0036] Compared to the prior art, the through hole 121 on the second seal 12 cooperates with the first groove 111 and the second groove 112 on the first seal 11, which are arranged in opposite directions and are not interconnected. This reduces the thickness of the first seal 11 at the location 113 where external instruments are inserted and removed. This ensures a good seal after both insertion and removal of external instruments, while also ensuring smooth insertion and removal of external instruments. Furthermore, the fluid path sealing structure 10 has the advantage of a simple structure.

[0037] It is worth noting that the above-mentioned liquid can be water, etc., but is not limited thereto. In addition, the aforementioned first groove 111 and the second groove 112 are not connected to each other, which means that they are separated by the corresponding positions of the first sealing member 11 to prevent the liquid from flowing between the first groove 111 and the second groove 112. In addition, although Figure 1 and Figure 2 The first sealing member 11 and the second sealing member 12 are shown to be sealedly matched with the side wall of the outer shell 41, but the present invention is not limited thereto.

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics 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 that fall 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 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 liquid circuit sealing structure of a hysteroscope, provided at a liquid return mechanism of the hysteroscope, the liquid return mechanism comprising an outer sleeve and an inner sleeve fitted inside the outer sleeve, the interior of the inner sleeve having a through channel penetrating the first end face and the second end face of the inner sleeve, the liquid circuit sealing structure comprising a first seal and a second seal fitted inside the outer sleeve in a sealing manner, the first seal also sealingly fitting with the first end face of the inner sleeve, the second seal facing away from the first end face of the inner sleeve and being stacked with the first seal, characterized in that: The first sealing member is provided with a first groove and a second groove corresponding to the through-channel along the through-channel direction. The first groove is arranged facing the through-channel and is also communicated with the through-channel. The second groove is arranged facing the second sealing member and is not communicated with the first groove. The second sealing member is provided with a through hole. The through hole is arranged opposite to and communicated with the second groove along the through-channel direction.

2. The liquid circuit sealing structure according to claim 1, characterized in that: Projections of the first groove and the second groove in the thickness direction of the first sealing member are arranged crosswise.

3. The liquid circuit sealing structure according to claim 1, characterized in that: Projections of the first groove and the second groove in the thickness direction of the first sealing member are arranged in a cross shape.

4. The liquid circuit sealing structure according to claim 1, characterized in that: The first groove and the second groove are both straight grooves; the distance between the first groove and the second groove ranges from 0.2 to 0.8 mm.

5. The liquid circuit sealing structure according to claim 1, characterized in that: The through hole of the second sealing member is a circular hole.

6. The liquid circuit sealing structure according to claim 1, characterized in that: It also includes an intermediate sealing ring located in the inner sleeve and sandwiched between the first sealing member and the second sealing member along the penetrating direction of the through channel. The through hole of the second sealing member is connected to the second groove via the internal space of the intermediate sealing ring.

7. A hysteroscope, comprising a handle, an insertion portion whose proximal end is assembled on the handle, and a liquid return mechanism assembled on the handle, wherein the liquid return mechanism comprises an outer shell fixed to the handle and an inner shell fitted inside the outer shell, the inner shell having a through passage passing through the first end face and the second end face of the inner shell, the proximal end of the insertion portion being further assembled in the through passage, characterized in that: The hysteroscope further comprises a liquid circuit sealing structure according to any one of claims 1 to 6.

8. The hysteroscope according to claim 7, characterized in that: The through passage is trumpet-shaped at a position adjacent to the first end surface of the inner sleeve.

9. The hysteroscope according to claim 7, characterized in that: The liquid return mechanism further includes a first sealing ring and a second sealing ring which are arranged on the outer sleeve of the inner sleeve and are spaced apart along the penetrating 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 first sealing member, the outer sleeve and the inner sleeve together enclose a second channel. The side wall of the inner sleeve is provided with a first side hole for connecting the first channel with the through-channel and a second side hole for connecting the second channel with the through-channel.

10. The hysteroscope according to claim 7, characterized in that: The outer shell is bent radially inward at the end away from the insertion portion to form a blocking ring. The outer shell is equipped with an instrument guide extending from the blocking ring to the outer shell. The instrument guide has a guide opening extending therethrough. The guide opening corresponds to the through hole along the penetrating direction of the through channel. The instrument guide is also clamped between the second sealing member and the blocking ring.

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