Sealer for puncture outfit and puncture outfit

Abstract

The sealer for the puncture outfit comprises a shell and a sealing piece arranged in the shell, the sealing piece comprises a first fixing part, a second fixing part and a sealing part, the sealing part is provided with a sealing hole for an instrument to penetrate through, and the sealing hole comprises a small-aperture end and a large-aperture end; one end of the first fixing part is connected to the small-aperture end, and the other end of the first fixing part is fixed to the shell; one end of the second fixing part is connected to the large-aperture end, and the other end of the second fixing part is fixed to the shell. According to the sealer for the puncture device and the puncture device provided by the utility model, the first fixing part and the second fixing part at the sealing hole are fixedly arranged, so that the structure at the sealing hole is relatively fixed, and large displacement and deformation are avoided, and therefore, the sealing element can be prevented from being folded, the service life of the sealing element is prolonged, and the probability of damage of the sealing element is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and more specifically, relates to a sealer for a puncture device and a puncture device. Background Art

[0002] The current punctures in the medical device market are mainly divided into two types: reusable punctures and disposable punctures. Reusable punctures are generally made of stainless steel metal materials and silicone rubber parts with sealing functions. During the repeated washing and elimination process, the inadequate cleaning of the complex internal structure will increase the risk of cross infection for patients and doctors. At the same time, the silicone rubber parts with sealing functions are prone to damage during repeated use, which will have a great impact on their sealing performance and life. Most disposable punctures are made of plastic parts. The common punctures on the market, whether reusable or disposable, have a narrow range of compatible diameters. Although there are puncture products on the market that claim to have a wider range of adaptability, the optimal diameter span that is usually supported is about 2mm. During the use of traditional disposable punctures with a larger adaptation span, when adapting to large-sized instruments, their sealing function parts are prone to damage due to large deformation, thereby affecting their sealing performance. In severe cases, it may affect the establishment of pneumoperitoneum, leading to surgical risks.

[0003] A common solution for traditional puncture devices is to reduce the caliber size of the sealing functional parts to achieve backward compatibility. This solution not only easily causes the risk of damage to the sealing functional parts, resulting in failure of the sealing performance, but also due to the large adaptation span of the sealing functional parts, when using large-diameter instruments, there is a problem of a sharp increase in resistance during the removal process due to the reversal of force on the sealing functional parts, resulting in folding, etc., which affects the use to a certain extent. Utility Model Content

[0004] The purpose of the embodiments of the utility model is to provide a sealer for a puncture device and a puncture device, so as to solve the technical problem that the seal in the prior art is easy to be folded and broken and loses effectiveness.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a sealer for a puncture device, including a shell and a seal arranged in the shell, the seal including a first fixing part, a second fixing part and a sealing part, the sealing part has a sealing hole for the instrument to pass through, and the sealing hole includes a small-diameter end and a large-diameter end; one end of the first fixing part is connected to the small-diameter end, and the other end of the first fixing part is fixed to the shell; one end of the second fixing part is connected to the large-diameter end, and the other end of the second fixing part is fixed to the shell.

[0006] In the above scheme, the sealer includes a shell and a seal, and the seal includes a sealing part, a first fixing part and a second fixing part. The sealing part is for the instrument to pass through and is sealed with the instrument. A sealing hole is opened on the sealing part to seal with the instrument. The first fixing part is connected to the small-diameter end of the sealing hole, and the second fixing part is connected to the large-diameter end of the sealing hole. The first fixing part and the second fixing part are both fixed to the shell. Since the hole wall of the sealing hole and the instrument have an interference fit when the instrument is inserted into the sealing hole, the seal is easily folded outward by the force of the instrument when the instrument is pulled out. By fixing the first fixing part and the second fixing part at the sealing hole, the structure at the sealing hole is relatively fixed and will not undergo large displacement and deformation, thereby preventing the seal from folding, extending the service life of the seal, and reducing the probability of seal damage.

[0007] Optionally, a fixing member is further included for pressing and fixing the other end of the first fixing portion to the shell.

[0008] In the above scheme, the first fixing part can be clamped and fixed by setting the fixing piece to prevent the small aperture end of the first fixing part and the sealing part from shifting and folding, thereby achieving a fixed connection between the first fixing part and the shell.

[0009] Optionally, the fixing piece is annular.

[0010] In the above scheme, by setting the fixing piece in a ring shape, the fixing piece can be close to the shape of the first fixing part and can press various circumferential parts of the first fixing part, so that the fixed connection between the first fixing part and the shell is more stable and the sealing part is less likely to fold.

[0011] Optionally, a first positioning portion is provided at one end of the first fixing portion connected to the shell, and a second positioning portion is provided on the shell, and the first positioning portion and the second positioning portion cooperate with each other for positioning.

[0012] In the above solution, the first fixing portion and the housing can be positioned circumferentially by plugging and fitting the first positioning portion and the second positioning portion, thereby preventing the first fixing portion from rotating circumferentially relative to the housing.

[0013] Optionally, the first fixing portion includes a plurality of connecting ribs spaced apart along the circumference of the sealing hole, one end of each of the connecting ribs is connected to the sealing portion, and the other end of each of the connecting ribs is connected to the shell.

[0014] In the above solution, by setting the first fixing part as a plurality of connecting ribs, the connecting ribs connect the shell and the sealing part, so that the shell and the sealing part can be connected without other fixing structures to fix the shell and the sealing part, and the structure is simpler.

[0015] Optionally, a plurality of guide portions arranged along the circumference of the sealing hole are provided on the inner side of the large-diameter end.

[0016] In the above scheme, multiple guide parts are arranged at circumferential intervals. When the instrument is pulled out, each guide part moves relative to the instrument. Compared with the annular guide part, negative pressure inside the sealing part can be avoided, and the friction between the instrument and the guide part can be reduced, making the instrument easier to pull out.

[0017] Optionally, the outer side surface of the sealing portion has a plurality of reinforcing ribs arranged along the extension direction of the sealing hole.

[0018] In the above scheme, the structural strength of the sealing part can be improved by setting the reinforcing ribs. When the instrument is pulled out, the sealing part is less likely to turn outward, and the sealing hole always remains the inner side of the sealing part, which can extend the service life of the seal.

[0019] Optionally, the shell includes a first shell and a second shell arranged in sequence, the seal is fixedly arranged in the second shell, the first shell has a guide hole, the axis of the guide hole coincides with the axis of the sealing hole, the guide hole extends close to the large aperture end, and the guide hole allows instruments to pass through.

[0020] In the above scheme, the housing includes a first housing and a second housing, the sealing member is arranged in the second housing, and the first housing and the second housing are connected to each other, so that the sealing member is more convenient to assemble and fix. Moreover, a guide hole is also arranged on the first housing, which can guide the instrument so that the instrument can smoothly enter the sealing member.

[0021] Optionally, the guide hole includes a first hole segment and a second hole segment connected to each other, the inner diameter of the first hole segment gradually decreases from the first hole segment to the second hole segment, the inner diameter of the second hole segment remains unchanged, and the first shell abuts against the inner wall of the sealing part at one end of the second hole segment away from the first hole segment.

[0022] In the above scheme, the instrument can be gradually guided to the second hole section through the first hole section, so that the instrument can smoothly enter the sealing member. By setting the end of the second hole section away from the first hole section to abut against the inner wall of the sealing portion, it is equivalent to limiting the inner wall of the sealing portion in the first direction, and when the instrument is pulled out along the second direction, the inner wall of the sealing portion can be prevented from turning outward.

[0023] The utility model also provides a puncture device, comprising a puncture sleeve and the above-mentioned puncture device sealer.

[0024] In the above scheme, the sealer for the puncture device includes a shell and a seal, and the seal includes a sealing part, a first fixing part and a second fixing part. The sealing part is for the instrument to pass through and is sealed with the instrument. A sealing hole is opened on the sealing part to seal with the instrument. The first fixing part is connected to the small-diameter end of the sealing hole, and the second fixing part is connected to the large-diameter end of the sealing hole, and the first fixing part and the second fixing part are both fixed to the shell. Since the hole wall of the sealing hole and the instrument have an interference fit when the instrument is inserted into the sealing hole, the seal is easily folded outward by the force of the instrument when the instrument is pulled out. By fixing the first fixing part and the second fixing part at the sealing hole, the structure at the sealing hole is relatively fixed, and no large displacement and deformation will occur, thereby preventing the seal from folding, extending the service life of the seal, and reducing the probability of seal damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A front view of a first trocar sealing adapter structure provided in an embodiment of the utility model;

[0027] Figure 2 A cross-sectional view of a first trocar sealing transition structure provided in an embodiment of the utility model;

[0028] Figure 3 A three-dimensional structural diagram of a first trocar sealer provided in an embodiment of the utility model;

[0029] Figure 4 for Figure 3 Exploded structure diagram;

[0030] Figure 5 A cross-sectional view of a first sealing member provided in an embodiment of the utility model (the fixing portion is not shown);

[0031] Figure 6 A cross-sectional view of a second sealing member provided in an embodiment of the utility model (the fixing portion is not shown);

[0032] Figure 7 A three-dimensional structural diagram of a third sealing member provided in an embodiment of the utility model;

[0033] Figure 8 An exploded structural diagram of a second trocar sealing transition structure provided by an embodiment of the utility model;

[0034] Fig. 9 A cross-sectional view of a second trocar sealing adapter structure provided in an embodiment of the utility model Figure 1 ;

[0035] Fig.10 A cross-sectional view of a second trocar sealing adapter structure provided in an embodiment of the utility model Figure 2 ;

[0036] Fig.11 A cross-sectional view of a third puncture device sealing transition structure provided in an embodiment of the utility model.

[0037] Among them, the reference numerals in the figure are:

[0038] 100-shell; 1-first shell; 11-first skirt; 12-first barrel; 13-first snap-fit ​​portion; 14-third positioning portion; 15-guide hole; 151-first hole section; 152-second hole section; 2-second shell; 21-second skirt; 22-second barrel; 23-second snap-fit ​​portion; 24-fourth positioning portion; 3-third shell; 31-sealing ring; 4-sealing member; 41-sealing portion; 412-guide portion; 413-sealing hole; 414-reinforcing rib; 42-first fixing portion; 421-connecting rib; 422-first positioning portion; 44-second fixing portion; 5-fixing member; 6-valve core; 7-air blocking cap. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] The current punctures in the medical device market are mainly divided into two types: reusable punctures and disposable punctures. Reusable punctures are generally made of stainless steel metal materials and silicone rubber parts with sealing functions. During the repeated washing and elimination process, the inadequate cleaning of the complex internal structure will increase the risk of cross infection for patients and doctors. At the same time, the silicone rubber parts with sealing functions are prone to damage during repeated use, which will have a great impact on their sealing performance and life. Most disposable punctures are made of plastic parts. The common punctures on the market, whether reusable or disposable, have a narrow range of compatible diameters. Although there are puncture products on the market that claim to have a wider range of adaptability, the optimal diameter span that is usually supported is about 2mm. During the use of traditional disposable punctures with a larger adaptation span, when adapting to large-sized instruments, their sealing function parts are prone to damage due to large deformation, thereby affecting their sealing performance. In severe cases, it may affect the establishment of pneumoperitoneum, leading to surgical risks.

[0044] A common solution for traditional puncture devices is to reduce the caliber size of the sealing functional parts to achieve backward compatibility. This solution not only easily causes the risk of damage to the sealing functional parts, resulting in failure of the sealing performance, but also due to the large adaptation span of the sealing functional parts, when using large-diameter instruments, there is a problem of a sharp increase in resistance during the removal process due to the reversal of force on the sealing functional parts, resulting in folding, etc., which affects the use to a certain extent.

[0045] In order to alleviate the above technical problems, the utility model proposes a sealer for a puncture device and a puncture device. Specifically, the sealer for a puncture device includes a housing 100 and a seal 4. The seal 4 includes a sealing portion 41 for the instrument to pass through. By respectively providing a first fixing portion 42 and a second fixing portion 44 at both ends of the sealing portion 41, and connecting the first fixing portion 42 and the second fixing portion 44 to the housing 100, both ends of the seal 4 can be connected to the housing 100. When the instrument is pulled out, the seal 4 will not be folded under the restriction of the first fixing portion 42 and the second fixing portion 44.

[0046] The sealer for the puncture device provided in the embodiment of the utility model is now described.

[0047] Please also read Figures 1 to 5The sealer for the puncture device includes a shell 100 and a seal 4 arranged in the shell 100, the seal 4 includes a first fixing portion 42, a second fixing portion 44 and a sealing portion 41, the sealing portion 41 has a sealing hole 413 for the instrument to pass through, and the sealing hole 413 includes a small aperture end and a large aperture end; one end of the first fixing portion 42 is connected to the small aperture end, and the other end of the first fixing portion 42 is fixed to the shell 100; one end of the second fixing portion 44 is connected to the large aperture end, and the other end of the second fixing portion 44 is fixed to the shell 100.

[0048] The sealing member 4 is disposed inside the housing 100, and the sealing member 4 is fixedly connected to the housing 100. Specifically, the sealing member 4 includes a first fixing portion 42, a second fixing portion 44, and a sealing portion 41. The sealing portion 41 has a sealing hole 413, one end of the sealing hole 413 has a larger inner diameter, and this end of the sealing hole 413 is called a large-aperture end, and the other end of the sealing hole 413 has a smaller inner diameter, and this end of the sealing hole 413 is called a small-aperture end. When the instrument is inserted into the sealing hole 413, the instrument is inserted from the large-aperture end of the sealing hole 413 to the small-aperture end. The small-aperture end of the sealing hole 413 and the instrument can be in a matching manner such as an interference fit, so that the instrument and the small-aperture end of the sealing portion 41 are sealed and connected.

[0049] The first fixing portion 42 is connected to the small-diameter end, the second fixing portion 44 is connected to the large-diameter end, and the end of the first fixing portion 42 away from the sealing portion 41 and the end of the second fixing portion 44 away from the sealing portion 41 are both fixedly connected to the housing 100. In this way, the two ends of the sealing portion 41 are respectively fixed to the housing 100 by the first fixing portion 42 and the second fixing portion 44. When the instrument is pulled out, even if the instrument has a certain force on the small-diameter end, the sealing portion 41 will not be folded to the hole wall of the sealing hole 413 facing outwards. Under the restriction of the first fixing portion 42 and the second fixing portion 44, the sealing portion 41 always maintains the hole wall of the sealing hole 413 facing inwards.

[0050] The sealer for the puncture device in the above embodiment includes a housing 100 and a seal 4, wherein the seal 4 includes a sealing portion 41, a first fixing portion 42 and a second fixing portion 44, wherein the sealing portion 41 is for the instrument to pass through and is sealed with the instrument, and a sealing hole 413 is provided on the sealing portion 41 for sealing with the instrument, wherein the first fixing portion 42 is connected to the small-diameter end of the sealing hole 413, and the second fixing portion 44 is connected to the large-diameter end of the sealing hole 413, and the first fixing portion 42 and the second fixing portion 44 are both fixed to the housing 100. Since the hole wall of the small-diameter end of the sealing hole 413 is interference-fitted with the instrument when the instrument is inserted into the sealing hole 413, the seal 4 is easily folded outward by the force of the instrument when the instrument is pulled out, and the first fixing portion 42 and the second fixing portion 44 at the sealing hole 413 are fixedly arranged, so that the structure at the sealing hole 413 is relatively fixed, and no large displacement and deformation will occur, thereby preventing the seal 4 from folding, extending the service life of the seal 4, and reducing the probability of damage to the seal 4.

[0051] In some embodiments of the present invention, please refer to Figures 2 to 4 The puncture sealer further includes a fixing member 5 for pressing and fixing the other end of the first fixing portion 42 to the housing 100. The other end of the first fixing portion 42 is the end of the first fixing portion 42 away from the sealing portion 41. It can be understood that the first fixing portion 42 is formed by radially extending outward from the outer side of the sealing portion 41, and the radially outermost end of the first fixing portion 42 is the other end of the first fixing portion 42. When the sealing member 4 is installed, the first fixing portion 42 of the sealing member 4 is arranged close to the housing 100, and the fixing member 5 presses the sealing member 4 to the housing 100, that is, the first fixing portion 42 is clamped and fixed between the housing 100 and the fixing member 5.

[0052] By setting the fixing member 5, the first fixing part 42 can be clamped and fixed to prevent the small-aperture end of the first fixing part 42 and the sealing part 41 from shifting and folding, thereby achieving a fixed connection between the first fixing part 42 and the housing 100.

[0053] In some embodiments, see Figure 3 and Figure 4 , the fixing member 5 is annular. The first fixing portion 42 is formed by radially extending outward from the outer side of the sealing portion 41, and at least part of the first fixing portion 42 is semi-annular or annular. It should be noted that when the fixing member 5 is annular, it can be a closed annular structure, or an open annular structure, or an annular structure formed by a combination of multiple sections. By setting the fixing member 5 to be annular, the shape of the fixing member 5 can be close to that of the first fixing portion 42, and various circumferential parts of the first fixing portion 42 can be pressed, so that the fixed connection between the first fixing portion 42 and the shell 100 is more stable, and the sealing portion 41 is less likely to fold.

[0054] In some embodiments, the first fixing portion 42 and the housing 100 are fixed by gluing to enhance the connection strength between the first fixing portion 42 and the housing 100 .

[0055] In some embodiments, the first fixing portion 42 and the fixing member 5 are fixed by gluing to enhance the connection strength between the first fixing portion 42 and the fixing member 5 .

[0056] In some embodiments of the present invention, please refer to Figure 4 The first fixing portion 42 is provided with a first positioning portion 422 at one end connected to the housing 100, and the housing 100 is provided with a second positioning portion, and the first positioning portion 422 and the second positioning portion cooperate with each other for positioning. One of the first positioning portion 422 and the second positioning portion is a convex structure, and the other is a concave structure. When the first positioning portion 422 and the second positioning portion cooperate with each other for positioning, the first positioning portion 422 and the second positioning portion are plugged and matched, thereby realizing the circumferential positioning of the first fixing portion 42 and the housing 100, and the circumferential direction is the same as the circumferential direction of the sealing hole 413.

[0057] Through the plug-in cooperation between the first positioning portion 422 and the second positioning portion, the circumferential positioning of the first fixing portion 42 and the housing 100 can be achieved, thereby preventing the first fixing portion 42 from circumferentially rotating relative to the housing 100 .

[0058] In some embodiments, there are multiple first positioning portions 422 , which are spaced apart along the circumference of the first fixing portion 42 , and there are multiple second positioning portions, which are spaced apart along the circumference of the housing 100 .

[0059] In some embodiments of the present invention, please refer to Figure 3 and Figure 4 The first fixing portion 42 includes a plurality of connecting ribs 421 spaced apart along the circumference of the sealing hole 413, one end of each connecting rib 421 is connected to the sealing portion 41, and the other end of each connecting rib 421 is connected to the housing 100. The plurality of connecting ribs 421 are spaced apart along the circumference of the sealing hole 413, and the connecting ribs 421 are arranged in a long strip shape, one end of the connecting rib 421 in the length direction is connected to the sealing portion 41, and the other end of the connecting rib 421 in the length direction is connected to the housing 100.

[0060] By configuring the first fixing portion 42 to be a plurality of connecting ribs 421, the connecting ribs 421 connect the shell 100 and the sealing portion 41, thereby enabling connection between the shell 100 and the sealing portion 41, without the need for other fixing structures to fix the shell 100 and the sealing portion 41, and thus the structure is simpler.

[0061] In some embodiments, a plurality of connection ribs 421 are arranged at equal intervals along the circumference of the sealing hole 413 , so that the connection structure between the housing 100 and the sealing portion 41 is arranged symmetrically, and each connection rib 421 is subjected to more uniform force.

[0062] In some embodiments of the present invention, please refer to Figure 5 and Figure 6 A plurality of guide portions 412 arranged along the circumference of the sealing hole 413 are provided on the inner side of the large-aperture end. Each guide portion 412 is formed by extending from the large-aperture end of the sealing hole 413 toward the center of the sealing hole 413. When the instrument is inserted, the plurality of guide portions 412 guide the instrument together, and when the instrument is inserted from the large-aperture end, it can be better aligned with the center of the small-aperture end, making it easier to insert the instrument into the small-aperture end.

[0063] Multiple guide portions 412 are arranged at circumferential intervals, so that when the instrument is inserted, the sealing portion 41 is in a non-sealed state. When the instrument is pulled out, each guide portion 412 moves relative to the instrument. Compared with the annular guide portion 412, negative pressure inside the sealing portion 41 can be avoided, and the friction between the instrument and the guide portion 412 can be reduced, making it easier to pull out the instrument.

[0064] In some embodiments, see Figure 5 , two circumferentially adjacent guide portions 412 are staggered in the axial direction of the sealing portion 41. In two circumferentially adjacent guide portions 412, the circumferentially adjacent side surfaces are referred to as adjacent side surfaces of the two guide portions 412. When the two guide portions 412 are staggered in the axial direction of the sealing portion 41, that is, the two adjacent side surfaces are staggered in the axial direction. In this way, when the instrument is pulled out, different axial positions of the instrument contact different guide portions 412, making it easier to pull out the instrument. In some other embodiments, the guide portion 412 is fixed in the sealing portion 41 and extends spirally around the central axis of the sealing portion 41. This spiral extension method can make the guide portion have a better guiding effect.

[0065] In some embodiments of the present invention, please refer to Figure 7 The outer side surface of the sealing portion 41 has a plurality of reinforcing ribs 414 arranged along the extension direction of the sealing hole 413. The side of the sealing portion 41 having the sealing hole 413 is the inner side surface of the sealing portion 41, and the side of the sealing portion 41 facing away from the sealing hole 413 is the outer side surface of the sealing portion 41. The extension direction of the sealing hole 413 can be understood as the extension direction of the hole wall of the sealing hole 413. For example, the sealing hole 413 is conical, and the outer side surface of the sealing portion 41 is also conical, and the extension direction of the sealing hole 413 can be understood as the generatrix of the conical surface. The length direction of the reinforcing ribs 414 is parallel to the length direction of the generatrix of the conical surface.

[0066] The structural strength of the sealing portion 41 can be improved by providing the reinforcing ribs 414. When the instrument is pulled out, the sealing portion 41 is less likely to turn outward, and the sealing hole 413 always remains on the inner side of the sealing portion 41, which can extend the service life of the sealing member 4.

[0067] In some embodiments, the reinforcing ribs 414 are evenly spaced along the circumference of the outer side surface of the sealing portion 41 , so that the circumferential structural strength of the sealing portion 41 is more uniform.

[0068] In some embodiments of the present invention, please participate in Figure 1 , Figure 2 and Figure 8 The housing 100 includes a first housing 1 and a second housing 2 which are arranged in sequence, and a sealing member 4 is fixedly arranged in the second housing 2. The first housing 1 has a guide hole 15, and the axis of the guide hole 15 coincides with the axis of the sealing hole 413. The guide hole 15 extends close to the large-diameter end of the sealing portion 41, and the guide hole 15 allows the instrument to pass through. When inserting the instrument, the end of the instrument first enters the interior of the first housing 1 through the guide hole 15, and then enters the sealing hole 413 of the sealing member 4 under the guidance of the guide hole 15, so that the instrument and the small-diameter end of the sealing member 4 form a seal.

[0069] The housing 100 includes a first housing 1 and a second housing 2, the sealing member 4 is disposed in the second housing 2, and the first housing 1 and the second housing 2 are connected to each other, so that it is more convenient to assemble and fix the sealing member 4. In addition, a guide hole 15 is also provided on the first housing 1, which can guide the instrument so that the instrument can enter the sealing member 4 smoothly.

[0070] In some embodiments of the present invention, please refer to Figure 2 and Fig.11 The guide hole 15 includes a first hole section 151 and a second hole section 152 connected to each other. The inner diameter of the first hole section 151 gradually decreases from the first hole section 151 to the second hole section 152. The inner diameter of the second hole section 152 remains unchanged, and the end of the second hole section 152 away from the first hole section 151 abuts against the inner wall of the sealing portion 41. The insertion direction of the instrument is the first direction. In the first direction, the inner diameter of the first hole section 151 gradually decreases. The end of the second hole section 152 away from the first hole section 151 abuts against the inner wall of the sealing portion 41. The inner wall of the sealing portion 41 can be understood as the hole wall of the sealing hole 413.

[0071] The instrument can be gradually guided to the second hole section 152 through the first hole section 151, so that the instrument can smoothly enter the sealing member 4. By setting the end of the second hole section 152 away from the first hole section 151 to abut against the inner wall of the sealing portion 41, it is equivalent to limiting the inner wall of the sealing portion 41 in the first direction, and when the instrument is pulled out along the second direction, the inner wall of the sealing portion 41 can be prevented from turning outward.

[0072] In some embodiments of the utility model, please refer to 2, the first shell 1 includes a first barrel portion 12 and a first skirt portion 11 formed by radially extending outward from one end of the first barrel portion 12, and the second shell 2 includes a second barrel portion 22 and a second skirt portion 21 formed by radially extending outward from one end of the second barrel portion 22. The first barrel portion 12 is arranged inside the second barrel portion 22. Among them, the sealing portion 41 is arranged between the first barrel portion 12 and the second barrel portion 22. The second fixing portion 44 is sandwiched between the first skirt portion 11 and the second skirt portion 21, so that the second fixing portion 44 is fixed to the shell 100.

[0073] In some embodiments, see Fig. 9 The first shell 1 and the second shell 2 are connected by snapping, which facilitates the installation and removal of the first shell 1 and the second shell 2. The first shell 1 is provided with a first snapping portion 13, and the second shell 2 is provided with a second snapping portion 23, and the first snapping portion 13 and the second snapping portion 23 are snapped with each other.

[0074] In some embodiments, see Fig.10 The first housing 1 is provided with a third positioning portion 14, and the second housing 2 is provided with a fourth positioning portion 24. The third positioning portion 14 and the fourth positioning portion 24 are plugged and positioned with each other, so that the first housing 1 and the second housing 2 will not move relative to each other in the circumferential direction. One of the third positioning portion 14 and the fourth positioning portion 24 is a convex structure, and the other is a concave structure.

[0075] In some embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 8 The housing 100 further includes a third housing 3, which is arranged on the periphery of the seal 4 and is used to protect the seal 4. The third housing 3 can be fixedly connected to the first housing 1 or the second housing 2. A sealing ring 31 is arranged on the periphery of the third housing 3 for sealing connection between the sealer and the puncture sleeve. Specifically, the puncture sleeve is sleeved on the periphery of the sealer for the puncture device, and the sealing ring 31 is arranged between the inner peripheral wall of the puncture sleeve and the outer peripheral wall of the third housing 3 to achieve a sealed connection between the puncture device and the puncture sleeve.

[0076] In some embodiments of the present invention, please refer to Figure 8 The sealer for the puncture device also includes an air valve core 6, which can be arranged on the third shell 3 to control the air path.

[0077] In some embodiments of the present invention, please refer to Figure 8 The sealer for the puncture device further includes an air blocking cap 7 , which is used to seal the first shell 1 and the second shell 2 .

[0078] The utility model also provides a puncture device, which includes the puncture device sealer in any of the above embodiments and a puncture sleeve. The puncture sleeve is sleeved on the outer periphery of the puncture device sealer, and a sealing ring 31 can be arranged between the puncture sleeve and the sealer to achieve a sealed connection.

[0079] The puncture device provided by the utility model adopts the above-mentioned puncture device sealer, which includes a shell 100 and a seal 4, wherein the seal 4 includes a sealing portion 41, a first fixing portion 42 and a second fixing portion 44. The sealing portion 41 is for the instrument to pass through and is sealed with the instrument. A sealing hole 413 is provided on the sealing portion 41 for sealing with the instrument. The first fixing portion 42 is connected to a small-aperture end of the sealing hole 413, and the second fixing portion 44 is connected to a large-aperture end of the sealing hole 413, and both the first fixing portion 42 and the second fixing portion 44 are fixed to the shell 100. Since the hole wall of the sealing hole 413 has an interference fit with the instrument when the instrument is inserted into the sealing hole 413, the sealing member 4 is easily folded outward by the force of the instrument when the instrument is pulled out. By fixing the first fixing portion 42 and the second fixing portion 44 at the sealing hole 413, the structure at the sealing hole 413 is relatively fixed and will not undergo large displacement and deformation, thereby preventing the sealing member 4 from folding, extending the service life of the sealing member 4, and reducing the probability of damage to the sealing member 4.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealer for a puncture device, characterized in that: The invention comprises a shell (100) and a sealing member (4) arranged in the shell (100), wherein the sealing member (4) comprises a first fixing portion (42), a second fixing portion (44) and a sealing portion (41), wherein the sealing portion (41) has a sealing hole (413) for an instrument to pass through, and the sealing hole (413) comprises a small-diameter end and a large-diameter end; one end of the first fixing portion (42) is connected to the small-diameter end, and the other end of the first fixing portion (42) is fixed to the shell (100); one end of the second fixing portion (44) is connected to the large-diameter end, and the other end of the second fixing portion (44) is fixed to the shell (100).

2. The trocar sealer according to claim 1, wherein: It also includes a fixing member (5) for pressing and fixing the other end of the first fixing portion (42) to the housing (100).

3. The trocar sealer according to claim 2, wherein: The fixing member (5) is ring-shaped.

4. The trocar sealer according to claim 1, wherein: One end of the first fixing portion (42) connected to the housing (100) is provided with a first positioning portion (422), and the housing (100) is provided with a second positioning portion, and the first positioning portion (422) and the second positioning portion cooperate with each other for positioning.

5. The trocar sealer according to claim 1, wherein: The first fixing portion (42) comprises a plurality of connecting ribs (421) arranged at intervals along the circumference of the sealing hole (413), one end of each connecting rib (421) being connected to the sealing portion (41), and the other end of each connecting rib (421) being connected to the shell (100).

6. The trocar sealer according to claim 5, characterized in that: A plurality of guide portions (412) arranged along the circumference of the sealing hole (413) are provided on the inner side of the large-diameter end.

7. The trocar sealer according to claim 5, characterized in that: The outer side surface of the sealing portion (41) has a plurality of reinforcing ribs (414) arranged along the extending direction of the sealing hole (413).

8. The sealer for a trocar according to any one of claims 1 to 4, characterized in that: The shell (100) comprises a first shell (1) and a second shell (2) which are arranged in sequence, the sealing member (4) is fixedly arranged in the second shell (2), the first shell (1) has a guide hole (15), the axis of the guide hole (15) coincides with the axis of the sealing hole (413), the guide hole (15) extends close to the large-diameter end, and the guide hole (15) allows instruments to pass through.

9. The trocar sealer according to claim 8, wherein: The guide hole (15) comprises a first hole section (151) and a second hole section (152) which are connected to each other, the inner diameter of the first hole section (151) gradually decreases in a direction from the first hole section (151) to the second hole section (152), the inner diameter of the second hole section (152) remains unchanged, and the first housing (1) abuts against the inner wall of the sealing portion (41) at one end of the second hole section (152) away from the first hole section (151).

10. A trocar, characterized in that: The puncture device comprises a puncture sleeve and a puncture device sealer according to any one of claims 1 to 9.

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