Liquid path sealing structure and hysteroscope with same

Abstract

The utility model discloses a liquid path sealing structure which is arranged at the position of a liquid return mechanism of a hysteroscope, the liquid return mechanism comprises an outer sleeve body and an inner sleeve body which is sleeved in the outer sleeve body in a matched mode, and a penetrating channel which penetrates through a first end face and a second end face which are opposite to each other is arranged in the inner sleeve body. The liquid path sealing structure comprises a first sealing piece which is positioned in the outer sleeve body and is in sealing fit with the first end surface of the inner sleeve body; the first sealing piece is provided with a sealing body used for being in sealing fit with the first end face of the inner sleeve body, a conical extending body extending out of the sealing body, stretching into the penetrating channel and a blind hole formed in the extending body and the sealing body at the same time, and an opening of the blind hole is located in the end face, back to the extending body, of the sealing body. Therefore, the plugging smoothness and the sealing effect of an external instrument on the first sealing element are improved. In addition, the utility model also discloses a hysteroscope comprising a handle, an insertion part, a liquid return mechanism and the liquid path sealing structure.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to a liquid channel sealing structure and a hysteroscope having the liquid channel sealing structure. Background Technology

[0002] Minimally invasive surgery is becoming increasingly common in the field of surgery due to its shorter recovery time, shorter operation duration, and lower cost. Minimally invasive surgery is typically performed by inserting instruments through small incisions or artificially created openings in the patient's uterus. Hysteroscopy is one such procedure. Hysteroscopy is primarily used in gynecology, such as fine-needle aspiration of ovarian cysts, pelvic adhesion separation, correction of fallopian tube obstruction, tortuosity, and adhesions, ectopic pregnancy surgery, myomectomy, gynecological tumor surgery, and subtotal and total hysterectomy for benign diseases. Hysteroscopic tubal flushing involves manipulating the uterine cavity with water under hysteroscopic guidance. In this technique, the surgeon inserts the hysteroscope into the woman's vagina and, under visual guidance, injects water into the uterine cavity to clean foreign objects or lesions, or to assist in intrauterine surgery. This method offers the advantages of direct visualization and precision, allowing clear observation of the uterine cavity, and is relatively safe. Therefore, hysteroscopes need to be equipped with water channels.

[0003] However, in existing hysteroscopes, due to the unreasonable design of their water channel sealing structure, there is a risk of water leakage when external instruments pass through the sealing structure from the instrument port at the handle and enter the insertion part. There is also a defect of poor instrument insertion and removal smoothness.

[0004] Therefore, there is an urgent need for a fluid-sealing structure and a hysteroscope with such a fluid-sealing structure to overcome the above-mentioned defects. Utility Model Content

[0005] One objective of this invention is to provide a liquid circuit sealing structure to improve insertion and removal smoothness and sealing effect.

[0006] Another objective of this invention is to provide a hysteroscope that improves insertion and removal smoothness and sealing effect.

[0007] To achieve the above objectives, the fluid sealing structure of this utility model is provided at the fluid return mechanism of a hysteroscope. This fluid return mechanism includes an outer sleeve and an inner sleeve fitted inside the outer sleeve. The inner sleeve has a through-channel penetrating a first end face and a second end face opposite to the inner sleeve. The fluid sealing structure of this utility model includes a first sealing member located within the outer sleeve and sealingly engaging with the first end face of the inner sleeve. The first sealing member has a sealing body for sealingly engaging with the first end face of the inner sleeve, a tapered extension extending from the sealing body into the through-channel, and a blind hole simultaneously formed in both the extension and the sealing body. The opening of the blind hole is located on the end face of the sealing body opposite to the extension.

[0008] Compared with the prior art, the design of "the first sealing element having a sealing body for sealing and engaging with the first end face of the inner sleeve, a tapered extension extending from the sealing body into the through channel, and a blind hole simultaneously opened in both the extension and the sealing body, with the opening of the blind hole located on the end face of the sealing body opposite to the extension" makes the first sealing element duckbill-shaped, and the insertion and removal position of the external instrument to the first sealing element is arranged at the tapered extension; and because the extension is tapered, on the one hand, it better seals the instrument passing through the extension from the side, thus improving the sealing effect; on the other hand, the tapered extension plays a guiding role during the insertion of the instrument, improving the smoothness of insertion and removal.

[0009] Preferably, the extension body has two inner inclined surfaces arranged opposite each other at the position where it surrounds the blind hole, with the center line of the blind hole as the center; the two inner inclined surfaces intersect each other and the line of intersection is perpendicular to the center line of the blind hole.

[0010] Preferably, the outer surface of the extension has two outer inclined surfaces arranged opposite each other with the center line of the blind hole as the center, and the two outer inclined surfaces are arranged in a figure-eight shape; the outer inclined surface on the same side is parallel to the inner inclined surface.

[0011] Preferably, the outer end face of the extension is a plane perpendicular to the center line of the blind hole.

[0012] Preferably, the centerline of the sealing body coincides with the centerline of the blind hole.

[0013] Preferably, the liquid sealing structure of this utility model further includes a second sealing element located inside the outer sleeve. The second sealing element is arranged back-to-back with the first end face of the inner sleeve. The second sealing element is also stacked with the first sealing element. The second sealing element is also provided with a through hole. The through hole is opposite to and communicates with the blind hole along the through-channel direction.

[0014] Preferably, the liquid circuit sealing structure of this utility model further includes an intermediate sealing ring located inside the outer sleeve and sandwiched between the first sealing member and the second sealing member along the through direction of the through channel, wherein the through hole of the second sealing member communicates with the blind hole through the internal space of the intermediate sealing ring.

[0015] To achieve the above objectives, the hysteroscope of this utility model includes a handle, an insertion part, a fluid return mechanism assembled at the handle, and the aforementioned fluid circuit sealing structure. The fluid return mechanism includes an outer sleeve fixed at the handle and an inner sleeve fitted inside the outer sleeve. The interior of the inner sleeve has a through channel penetrating a first end face and a second end face opposite to the inner sleeve, and the proximal end of the insertion part is assembled in the through channel.

[0016] Preferably, the liquid return mechanism further includes a first sealing ring, a second sealing ring, and a third sealing ring that are fitted over the inner sleeve and spaced apart along the through-channel direction. The first sealing ring, the second sealing ring, the outer sleeve, and the inner sleeve together form a first channel, and the second sealing ring, the third sealing ring, the outer sleeve, and the inner sleeve together form a second channel. The side wall of the inner sleeve is provided with a first side hole for communicating the first channel with the through-channel and a second side hole for communicating the second channel with the through-channel.

[0017] Preferably, the outer casing is a cylindrical structure, with the closed end of the cylindrical structure arranged opposite to the first sealing element, and the closed end having a through-hole for an instrument inlet / outlet extending along the through-hole direction.

[0018] Compared with the prior art, the design of "the first sealing element having a sealing body for sealing and engaging with the first end face of the inner sleeve, a tapered extension extending from the sealing body into the through channel, and a blind hole simultaneously opened in both the extension and the sealing body, with the opening of the blind hole located on the end face of the sealing body opposite to the extension" makes the first sealing element duckbill-shaped, and the insertion and removal position of the external instrument to the first sealing element is arranged at the tapered extension; and because the extension is tapered, on the one hand, it better seals the instrument passing through the extension from the side, thus improving the sealing effect; on the other hand, the tapered extension plays a guiding role during the insertion of the instrument, improving the smoothness of insertion and removal. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the hysteroscope of this utility model.

[0020] Figure 2 yes Figure 1 The diagram shown is a three-dimensional exploded view of the hysteroscopy.

[0021] Figure 3 yes Figure 2 A further exploded 3D diagram.

[0022] Figure 4 yes Figure 1 The image shown is a plan view of the hysteroscopy from above.

[0023] Figure 5 It is along Figure 4 Internal view of the section cut along line AA.

[0024] Figure 6 yes Figure 5 Enlarged view of section B.

[0025] Figure 7 This is a perspective view of the first sealing element in the fluid sealing structure of the hysteroscope of this utility model.

[0026] Figure 8 yes Figure 7 The first seal shown is a perspective view at another angle.

[0027] Figure 9 yes Figure 7 The first seal shown is in a plan view viewed from front to back.

[0028] Figure 10 It is along Figure 9 Internal view of the section cut along the DD line.

[0029] Figure 11 This is a three-dimensional view of the outer casing of the hysteroscopic fluid return mechanism of this utility model.

[0030] Figure 12 This is a three-dimensional view of the inner sleeve in the hysteroscopy fluid return mechanism of this utility model. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific implementation examples and accompanying drawings, and the technical solutions of this utility model will be explained. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this utility model. However, this 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 departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Embodiments of this utility model will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Please see Figures 1 to 6 The hysteroscope 100 of this utility model includes a fluid sealing structure 10, a handle 20, an insertion part 30, and a fluid return mechanism 40 assembled at the handle 20. The handle 20 provides a mounting location for the fluid return mechanism 40. Optionally, it can be combined with... Figures 1 to 3 As an example, the return fluid mechanism 40 is built into the handle 20, which hides the return fluid mechanism 40, thus making the hysteroscope 100 of this invention more concise in appearance. Obviously, depending on actual needs, the relationship between the return fluid mechanism 40 and the handle 20 can also be other relationships well known in the art, so it is not considered... Figures 1 to 3 The above is the limit.

[0034] Meanwhile, the return mechanism 40 includes an outer sleeve 41 fixed to the handle 20 and an inner sleeve 42 fitted inside the outer sleeve 41. Optionally, in Figure 6 As an example, the outer sleeve 41 and the inner sleeve 42 are also laterally sealed together. Specifically, the first sealing ring 43, the second sealing ring 44, and the third sealing ring 45, as described below, are used to laterally seal the outer sleeve 41 and the inner sleeve 42 to better prevent liquid leakage from the gap between the outer sleeve 41 and the inner sleeve 42. In addition, the inner sleeve 42 has a through channel 423 that passes through the first end face 421 and the second end face 422 opposite to each other. That is, the first end face 421 and the second end face 422 are opposite to each other, and the through channel 423 passes through the first end face 421 and the second end face 422. The proximal end 31 of the insertion part 30 is fitted into the through channel 423 to meet the need for external instruments to enter the proximal end 31 of the insertion part 30 through the through channel 423.

[0035] The liquid circuit sealing structure 10 is located in the liquid return mechanism 40 and is used to seal the end of the through channel 423 near the first end face 421, and in conjunction with... Figure 3 and Figure 6As an example, the fluid sealing structure 10 includes a first sealing member 11 located inside the outer sleeve 41 and sealingly engaging with the first end face 421 of the inner sleeve 42. The first sealing member 11 has a sealing body 111 for sealingly engaging with the first end face 421 of the inner sleeve 42, a tapered extension 112 extending from the sealing body 111 into the through channel 423, and a blind hole 113 simultaneously formed in both the extension 112 and the sealing body 111. The opening 1131 of the blind hole 113 is located on the end face 1121 of the sealing body 111 facing away from the extension 112, so as to facilitate the operation of external instruments entering the blind hole 113 through the opening 1131 and then passing through the through channel 423 from the extension 112. More specifically, as follows:

[0036] Combination Figure 3 and Figure 6 As an example, the fluid sealing structure 10 also includes a second seal 12 and an intermediate sealing ring 13 located inside the outer sleeve 41. The second seal 12 is arranged back-to-back with the first end face 421 of the inner sleeve 42, and the second seal 12 is also stacked with the first seal 11. The second seal 12 also has a through hole 121, which is opposite to and communicates with the blind hole 113 along the through direction of the through channel 423 (see arrow C). The intermediate sealing ring 13 is sandwiched between the first seal 11 and the second seal 12 along the through direction of the through channel 423. The through hole 121 of the second seal 12 communicates with the blind hole 113 through the internal space 131 of the intermediate sealing ring 13. Therefore, the introduction of the intermediate sealing ring 13 provides space for the second seal 12 to rebound after the external instrument is pulled out, thereby facilitating the rebound and reset of the second seal 12. It should be noted that, depending on actual needs, the liquid sealing structure 10 can also be designed to include only the first sealing element 11, or only the first sealing element 11 and the second sealing element 12. When the liquid sealing structure 10 includes only the first sealing element 11, the first sealing element 11 is directly clamped by the closed end 41a of the outer sleeve 41 (described below) and the inner sleeve 42 in the penetrating direction of the penetrating channel 423. When the liquid sealing structure 10 includes only the first sealing element 11 and the second sealing element 12, both the first sealing element 11 and the second sealing element 12 are directly clamped by the closed end 41a of the outer sleeve 41 and the inner sleeve 42 in the penetrating direction of the penetrating channel 423. When the liquid sealing structure 10 includes the first sealing element 11, the second sealing element 12, and the intermediate sealing ring 13, the first sealing element 11, the intermediate sealing ring 13, and the second sealing element 12 are clamped by the closed end 41a of the outer sleeve 41 and the inner sleeve 42 in the penetrating direction of the penetrating channel 423. Therefore, it is not considered as... Figure 3 and Figure 6 The above is the limit.

[0037] Combination Figure 8 and Figure 10 As an example, the extension 112 has two inner inclined surfaces 1121 arranged opposite each other at the position surrounding the blind hole 113. This design improves the sealing effect of the extension 112 on instruments passing through it and provides better guidance during instrument passage, thereby effectively improving the smoothness of instrument insertion and removal. Alternatively, in... Figure 10 In the example shown, the two inner inclined surfaces 1121 are arranged symmetrically with the center line C of the blind hole 113 as the center; furthermore, the two inner inclined surfaces 1121 intersect each other and the intersection line 1122 is perpendicular to the center line C of the blind hole 113, as shown in the figure. Figure 8 and Figure 10 As shown, this design further improves the sealing effect and the smoothness of insertion and removal.

[0038] Combination Figure 7 , Figure 9 and Figure 10 As an example, the outer surface of the extension 112 has two external bevels 1123 arranged opposite each other with the center line C of the blind hole 113 as the center. The two external bevels 1123 are arranged in a figure-eight shape. This design allows for thinning of the extension 112, making it easier for the instrument to pass through the extension 112. Specifically, in Figure 10 In the middle, as an example, on the same side (see Figure 10 The outer inclined surface 1123 (on the left or right side) and the inner inclined surface 1121 are parallel to each other to ensure the thickness consistency of the extension 112 located between the outer inclined surface 1123 and the inner inclined surface 1121. Additionally, in Figure 10 In this example, the outer end face 1124 of the extension 112 is a plane perpendicular to the center line C of the blind hole 113. This design ensures that external instruments are inserted and removed from the extension 112 in a direction perpendicular to the outer end face 1124 (i.e., along the center line C), thereby improving the smoothness of instrument insertion and removal from the extension 112. Furthermore, in Figure 10 In this example, the centerline of the sealing body 111 coincides with the centerline C of the blind hole 113 to facilitate the manufacturing and processing of the first seal 11.

[0039] Combination Figure 6 and Figure 12 As an example, the return mechanism 40 also includes a first sealing ring 43, a second sealing ring 44, and a third sealing ring 45, which are outer sleeves of the inner sleeve 42 and spaced apart along the through-passage direction of the through-passage 423. The first sealing ring 43, the second sealing ring 44, the outer sleeve 41, and the inner sleeve 42 together form a first channel 46, and the second sealing ring 44, the third sealing ring 45, the outer sleeve 41, and the inner sleeve 42 together form a second channel 47, as shown in the diagram. Figure 6As shown, the inner sleeve 42 has a first side hole 425 for connecting the first channel 46 and the through channel 423, and a second side hole 426 for connecting the second channel 47 and the through channel 423. This design allows liquid entering the second channel 47 from the external inlet 412 of the outer sleeve 41 to first flow into the uterine cavity through the inner tube 30b of the insertion part 30 for appropriate treatment. The treated liquid then flows back from the outer tube 30a of the insertion part 30 to the first channel 46, and then flows out from the return inlet 413 of the outer sleeve 41, thus achieving the purpose of external liquid entering and exiting the uterine cavity. Furthermore, the outer sleeve 41 has a cylindrical structure, with the closed end 41a of the cylindrical structure arranged opposite to the first sealing member 11. The closed end 41a has a through-hole 411 extending along the through direction of the through channel 423, facilitating the entry and exit of external instruments into and out of the hysteroscope 100 of this invention.

[0040] Compared with the prior art, the design of "the first sealing member 11 having a sealing body 111 for sealing and engaging with the first end face 421 of the inner sleeve 42, a tapered extension 112 extending from the sealing body 111 into the through channel 423, and a blind hole 113 simultaneously opened in both the extension 112 and the sealing body 111, with the opening 1131 of the blind hole 113 located on the end face 1121 of the sealing body 111 facing away from the extension 112" makes the first sealing member 11 resemble a duckbill, and arranges the insertion and removal position of the external instrument on the first sealing member 11 at the tapered extension 112; and since the extension 112 is tapered, on the one hand, it better seals the instrument passing through the extension 112 from the side, thus improving the sealing effect; on the other hand, the tapered extension 112 plays a guiding role during the insertion of the instrument, improving the smoothness of insertion and removal.

[0041] It is worth noting that the proximal end 31 of the aforementioned insertion portion 30 refers to the end of the insertion portion 30 closer to the handle 20, while the distal end 32 of the insertion portion 30 refers to the end farther from the handle 30. Furthermore, since the specific structures of both the insertion portion 30 and the handle 20 are well known in the art, they will not be described in detail here. Additionally, when the second seal 12 needs to seal an external instrument passing through the through hole 121, the external instrument inserted into the through hole 121 can be made to have an interference fit with the through hole 121. Finally, the liquid mentioned above can be, but is not limited to, liquid water.

[0042] It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, the embodiments disclosed above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, equivalent variations made within the scope of the claims of this utility model are still within the scope of this utility model.

Claims

1. A liquid circuit sealing structure, characterized in that: The fluid return mechanism of the hysteroscope includes an outer sleeve and an inner sleeve fitted inside the outer sleeve. The inner sleeve has a through channel penetrating a first end face and a second end face opposite to the inner sleeve. The fluid sealing structure includes a first sealing member located inside the outer sleeve and sealingly engaging with the first end face of the inner sleeve. The first sealing member has a sealing body for sealingly engaging with the first end face of the inner sleeve, a tapered extension extending from the sealing body into the through channel, and a blind hole simultaneously opened in both the extension and the sealing body. The opening of the blind hole is located on the end face of the sealing body opposite to the extension.

2. The liquid circuit sealing structure according to claim 1, characterized in that, The extension body has two inner inclined surfaces arranged opposite each other at the position where it encloses the blind hole, with the center line of the blind hole as the center; the two inner inclined surfaces intersect each other and the line of intersection is perpendicular to the center line of the blind hole.

3. The liquid circuit sealing structure according to claim 2, characterized in that, The outer surface of the extension has two external inclined surfaces arranged opposite each other with the center line of the blind hole as the center. The two external inclined surfaces are arranged in a figure-eight shape. The external inclined surface on the same side is parallel to the inner inclined surface.

4. The liquid circuit sealing structure according to claim 2, characterized in that, The outer end face of the extension is a plane perpendicular to the center line of the blind hole.

5. The liquid circuit sealing structure according to claim 1, characterized in that, The centerline of the sealing body coincides with the centerline of the blind hole.

6. The liquid circuit sealing structure according to claim 1, characterized in that, It also includes a second seal located inside the outer sleeve, the second seal being arranged opposite to the first end face of the inner sleeve, the second seal being stacked on top of the first seal, and the second seal having a through hole that is opposite to and communicates with the blind hole along the through-channel direction.

7. The liquid circuit sealing structure according to claim 6, characterized in that, It also includes an intermediate sealing ring located within the outer casing and sandwiched between the first and second seals along the through-channel direction, wherein the through-hole of the second seal communicates with the blind hole via the internal space of the intermediate sealing ring.

8. A hysteroscope, comprising a handle, an insertion portion, and a fluid return mechanism fitted to the handle, the fluid return mechanism comprising an outer sleeve fixed to the handle and an inner sleeve fitted inside the outer sleeve, the inner sleeve having a through channel penetrating a first end face and a second end face opposite to the inner sleeve, the proximal end of the insertion portion being fitted into the through channel, characterized in that, The hysteroscope further includes a fluid sealing structure according to any one of claims 1 to 7.

9. The hysteroscope according to claim 8, characterized in that, The liquid return mechanism further includes a first sealing ring, a second sealing ring, and a third sealing ring that are fitted over the inner sleeve and spaced apart along the through-channel direction. The first sealing ring, the second sealing ring, the outer sleeve, and the inner sleeve together form a first channel, and the second sealing ring, the third sealing ring, the outer sleeve, and the inner sleeve together form a second channel. The side wall of the inner sleeve is provided with a first side hole for communicating the first channel with the through-channel and a second side hole for communicating the second channel with the through-channel.

10. The hysteroscope according to claim 8, characterized in that, The outer casing is a cylindrical structure, with the closed end of the cylindrical structure arranged opposite to the first sealing element, and the closed end having a through-hole for the instrument to enter and exit along the through-hole direction.

Images