Connecting structure for puncture outfit and puncture outfit

Abstract

The invention relates to the technical field of medical instruments, and discloses a connecting structure for a puncture outfit and the puncture outfit. The connecting structure comprises a sleeve assembly and a sealing assembly which are sequentially arranged in the first direction; the sleeve assembly comprises a sleeve and a flange arranged at one end of the sleeve. The sealing assembly comprises a base, the base is provided with a containing groove, the containing groove is used for containing the flange, and the two opposite inner side walls of the containing groove in the first direction abut against the flange; the base is rotated relative to the flange in the second direction, the flange can be moved out of the containing groove through the groove opening of the containing groove, and the second direction is parallel to the circumferential direction of the sleeve. According to the connecting structure for the puncture outfit and the puncture outfit, the disassembly process and the assembly process between the sleeve assembly and the sealing assembly can be convenient.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a connection structure for a puncture device and a puncture device. Background Art

[0002] When performing abdominal surgery on a patient, it is necessary to first establish a surgical channel between the abdominal cavity and the outside world so that surgical instruments can enter the abdominal cavity through the surgical channel to perform surgery. This process requires the use of a puncture device.

[0003] When establishing a surgical channel, you need to first insert the puncture needle of the puncture device into the sleeve assembly of the puncture device, and then insert the puncture needle and the sleeve assembly into the abdominal cavity together. After the sleeve assembly is inserted to the specified depth, the puncture needle is pulled out, and the sleeve assembly forms a surgical channel.

[0004] In order to improve the sealing between the puncture needle and the sleeve assembly, the puncture device also includes a sealing assembly arranged between the puncture needle and the sleeve assembly. However, the connection structure between the sleeve assembly and the sealing assembly in the traditional puncture device is relatively complicated, and the disassembly and assembly processes are relatively inconvenient. Summary of the invention

[0005] The present application provides a connection structure for a puncture device and a puncture device, which can facilitate the disassembly and assembly processes between a sleeve assembly and a sealing assembly.

[0006] In a first aspect, an embodiment of the present application provides a connection structure for a trocar, comprising a sleeve assembly and a sealing assembly sequentially arranged along a first direction;

[0007] The sleeve assembly comprises a sleeve and a flange arranged at one end of the sleeve;

[0008] The sealing assembly comprises a base, the base is provided with a receiving groove, the receiving groove is used to receive the flange, and the two inner side walls of the receiving groove opposite to each other along the first direction are both against the flange; wherein,

[0009] The flange can be moved out of the receiving groove through the notch of the receiving groove by rotating the base relative to the flange in a second direction, and the second direction is parallel to the circumferential direction of the sleeve.

[0010] The connection structure for the puncture device provided in the embodiment of the present application has the beneficial effect that: the sleeve assembly includes a sleeve and a flange provided at one end of the sleeve, the sealing assembly includes a base, the base is provided with a receiving groove, the receiving groove is used to accommodate the flange, and the two inner side walls of the receiving groove opposite to each other along the first direction are both against the flange. In this way, when the sleeve assembly and the sealing assembly need to be disassembled, the base only needs to be rotated relative to the flange in the second direction, so that the flange can be moved out of the receiving groove through the notch of the receiving groove, so that the sleeve assembly and the sealing assembly can be disassembled; when the sleeve assembly and the sealing assembly need to be assembled together, the base only needs to be rotated relative to the flange in the direction opposite to the second direction, so that the flange can enter the receiving groove through the notch of the receiving groove, and the base can be limited to move relative to the flange in a direction parallel to the first direction, and the base can be limited to rotate relative to the flange in the circumferential direction of the sleeve, so that the sleeve assembly and the sealing assembly are assembled together. The connection structure provided in the embodiment of the present application can make the disassembly process and assembly process between the sleeve assembly and the sealing assembly more convenient.

[0011] In some embodiments, the sealing assembly includes an elastic portion connected to the base, the elastic portion having a free end, and the free end abuts against the flange to limit the base from rotating relative to the flange along the circumferential direction of the sleeve.

[0012] In some embodiments, a avoidance hole is provided on the base, the elastic part is located in the avoidance hole, the avoidance hole penetrates the groove wall of the accommodating groove along the radial direction of the sleeve, and the elastic part abuts against the flange along the radial direction of the sleeve.

[0013] In some embodiments, the elastic portion extends along the second direction, and an end of the elastic portion facing away from the second direction is connected to the base, and an end of the elastic portion facing the second direction is the free end.

[0014] In some embodiments, the flange is provided with a first limiting groove, and the free end is provided with a first stop portion, the first stop portion is located in the first limiting groove and abuts against the side wall of the first limiting groove to limit the base from rotating relative to the flange along the circumferential direction of the sleeve.

[0015] In some embodiments, the direction of the notch of the accommodating groove is opposite to the second direction; the flange is provided with a first limiting portion, the first limiting portion is abutted against an end of the base facing away from the second direction, and the first stop portion is abutted against the inner side wall of the first limiting groove facing away from the second direction.

[0016] In a second aspect, an embodiment of the present application provides a puncture device, the puncture device comprising:

[0017] The connection structure as described in the first aspect;

[0018] A poking card assembly is inserted into the sealing assembly and the sleeve assembly in sequence along a third direction, and the third direction is opposite to the first direction.

[0019] In some embodiments, the poking card assembly includes an annular wall body and a poking card body, the annular wall body penetrates into the sealing assembly along the third direction, one end of the poking card body is located inside the annular wall body, and the other end of the poking card body extends out of the annular wall body and penetrates into the sleeve assembly along the third direction.

[0020] In some embodiments, the puncture card assembly is provided with a main channel; the puncture device also includes a guide assembly arranged in the main channel, the guide assembly includes a main body, the main body is provided with a sub-channel and a channel outlet, the sub-channel is used for surgical instruments to pass through, and the main channel and the sub-channel are connected through the channel outlet.

[0021] In some embodiments, the guide assembly also includes a sealing door, one end of which is rotatably connected to the main body; the guide assembly also includes an opening and closing elastic member and a handle, and the main body and the sealing door are both connected to the opening and closing elastic member, so that the sealing door cover is arranged at the channel outlet, and by rotating the sealing door along a fourth direction relative to the main body, the opening and closing elastic member can be compressed and the sealing door can be moved away from the channel outlet, and the handle is connected to the sealing door, and the handle is used to drive the sealing door to rotate relative to the main body along the fourth direction.

[0022] In some embodiments, the card poking assembly is provided with an assembly hole penetrating the inner wall of the main channel, the sealing door is located in the main channel, and the handle is rotatably passed through the assembly hole and connected to the sealing door.

[0023] In some embodiments, the handle is provided with a third limiting groove located in the main channel, and the main body is provided with a third limiting portion, and the third limiting portion is located in the third limiting groove to limit the movement of the handle in a direction away from the main body.

[0024] In some embodiments, the guide assembly also includes a second sealing member, which is sleeved on the main body along the first direction, and the second sealing member is provided with a protrusion and an opening, the protrusion is abutted against the sealing door, the sealing door cover is provided on the opening, and the channel outlet is located in the space enclosed by the sealing door and the second sealing member.

[0025] The beneficial effects of the puncture device provided in the present application compared with the prior art, as well as the beneficial effects of the connection structure for the puncture device provided in the present application compared with the prior art, will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic diagram of the assembly structure of a puncture device in one of the embodiments of the present application;

[0028] Figure 2 yes Figure 1 The exploded structural diagram of the trocar shown;

[0029] Figure 3 yes Figure 1 A schematic diagram of the assembly structure of the connection structure in the puncture device shown;

[0030] Figure 4 yes Figure 3 A schematic diagram of a first state of an assembly process in the connection structure shown;

[0031] Figure 5 yes Figure 3 A schematic diagram of a second state of the assembly process in the connection structure shown;

[0032] Figure 6 yes Figure 3 A schematic diagram of a partial structure of a sleeve assembly in the connection structure shown;

[0033] Figure 7 yes Figure 3 A schematic diagram of the exploded structure of the sealing assembly in the connection structure shown;

[0034] Figure 8 yes Figure 3 A schematic structural diagram of a base in the sealing assembly shown;

[0035] Fig. 9 yes Figure 8 A schematic structural diagram of the base from another perspective shown;

[0036] Fig.10 yes Figure 8 A schematic diagram of a partial structure of the base shown in another perspective;

[0037] Fig.11 yes Figure 8A structural schematic diagram of the base shown in another perspective;

[0038] Fig.12 yes Figure 3 A schematic diagram of the assembly structure of the sealing component in the connection structure shown;

[0039] Fig.13 yes Figure 3 A cross-sectional view of the connection structure shown;

[0040] Fig.14 yes Figure 1 A schematic diagram of the assembly structure of the puncture assembly and the guide assembly in the puncture device shown;

[0041] Fig.15 yes Figure 1 A partial cross-sectional view of the trocar shown;

[0042] Fig.16 yes Fig.12 The exploded structural diagram of the poking card assembly and the guide assembly shown;

[0043] Fig.17 yes Fig.16 A schematic diagram of the structure of the guide assembly shown;

[0044] Fig.18 yes Fig.17 a cross-sectional view of the guide assembly shown;

[0045] Fig.19 yes Fig.14 A schematic diagram of the assembly process of the stamping assembly and the guide assembly shown;

[0046] Fig. 20 yes Fig.16 A schematic diagram of the structure of the handle in the guide assembly shown;

[0047] Fig.21 yes Fig.17 A schematic structural diagram of a main body member in the guide assembly shown;

[0048] Fig. 22 yes Fig.17 A schematic diagram of the structure of the sealing door in the guide assembly shown;

[0049] Fig.23 yes Fig.17 A schematic diagram of the exploded structure of the guide assembly shown;

[0050] Fig.24 yes Fig.17 A schematic structural diagram of a second sealing member in the guide assembly shown;

[0051] Fig.25 yes Fig.18A schematic diagram of the structure of the protective cover in the guide assembly is shown.

[0052] The meanings of the marks in the figure are:

[0053] 100. Trocar;

[0054] 10. Sleeve assembly;

[0055] 11. sleeve; 12. flange; 121. first limiting groove; 122. first limiting portion; 123. first inclined surface;

[0056] 20. Sealing assembly;

[0057] 21. Base; 210. Connecting portion; 211. Accommodating groove; 212. Avoidance hole; 213. Mounting hole; 214. Card slot; 215. Second limiting groove;

[0058] 22, elastic portion; 221, free end; 222, first stopper; 223, second inclined surface;

[0059] 23. first sealing member; 231. second limiting portion; 232. first annular portion; 233. opening and closing structure; 234. second annular portion;

[0060] 24. Cover plate; 241. Buckle; 242. Connecting elastic member;

[0061] 30. Card stamping assembly;

[0062] 31. annular wall body; 32. card body; 33. main channel; 34. assembly hole;

[0063] 40. Guide assembly;

[0064] 41. Main body; 411. Sub-channel; 412. Channel outlet; 413. Third limiting portion; 414. Equal-diameter cylindrical surface; 415. Variable-diameter cylindrical surface;

[0065] 42. Sealing door; 421. Insertion part;

[0066] 43. Opening and closing elastic member;

[0067] 44. handle; 441. third limiting groove; 442. plug-in portion;

[0068] 45. second sealing member; 451. raised portion; 452. opening;

[0069] 46, protective cover; 461, leaf petals;

[0070] 47. Fixed ring;

[0071] 48. The third seal. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0073] 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.

[0074] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] References to "one embodiment", "some embodiments" or "an embodiment" described in the specification of this application mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some other embodiments", "in some other embodiments", etc., which appear at different places in this specification, do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, particular features, structures or characteristics may be combined in any suitable manner.

[0076] In order to illustrate the technical solution of the present application, a description is given below with reference to specific drawings and embodiments.

[0077] The connection structure between the sleeve assembly and the sealing assembly in a traditional puncture device is generally provided with a latch or a buckle, and the disassembly and assembly processes thereof both require the disassembly and installation of the latch or the buckle, which is inconvenient to operate.

[0078] To solve the above problems, please refer to Figure 1 , Figure 2 and Figure 3 In the first aspect, the embodiment of the present application provides a connection structure for a puncture device 100, the connection structure comprising a sleeve assembly 10 and a sealing assembly 20 arranged in sequence along a first direction, the first direction being a direction along the central axis of the connection structure, that is, approximately Figure 1 , Figure 2 and Figure 3In the bottom-up direction.

[0079] Please refer to Figure 6 The sleeve assembly 10 includes a sleeve 11 and a flange 12 arranged at one end of the sleeve 11.

[0080] It is understandable that the sleeve 11 and the flange 12 can be integrally formed, such as integrally injection molded or integrally machined; or, the sleeve 11 and the flange 12 are connected by bonding, welding, clamping or screw connection. The sleeve 11 can be made of metal or plastic, and the flange 12 can be arranged on the end face or outer circumference of the sleeve 11.

[0081] Please refer to Figure 7 and Figure 8 The sealing assembly 20 includes a base 21, which can be sleeved on one end of the sleeve 11. The base 21 is provided with a receiving groove 211, which can be provided on the inner wall of the base 21. When the sealing assembly 20 and the sleeve assembly 10 are installed, the receiving groove 211 is used to accommodate the flange 12. The base 21 is sleeved on one end of the sleeve 11 with the flange 12, and the two inner side walls of the receiving groove 211 opposite to each other along the first direction are both against the flange 12.

[0082] It can be understood that since the two inner side walls of the accommodating groove 211 opposite to each other along the first direction are both in abutment with the flange 12, the movement of the flange 12 relative to the accommodating groove 211 along the first direction is limited, thereby limiting the movement of the sleeve assembly 10 relative to the sealing assembly 20 along the first direction.

[0083] Please refer to Figure 4 and Figure 5 It can also be understood that when the sleeve assembly 10 and the sealing assembly 20 need to be separated, it is only necessary to manually rotate the base 21 relative to the flange 12 in the second direction by external force, and the second direction is parallel to the circumferential direction of the sleeve 11, so that the flange 12 moves out of the receiving groove 211 through the notch of the receiving groove 211, and the sleeve assembly 10 and the sealing assembly 20 can be separated. When the sleeve assembly 10 and the sealing assembly 20 need to be assembled, it is only necessary to first dock the sealing assembly 20 and the sleeve assembly 10 together (such as Figure 4 The sealing assembly 20 and the sleeve assembly 10 are aligned in the direction indicated by the arrow in the middle), and then the base 21 is manually moved relative to the flange 12 in the direction opposite to the second direction (such as Figure 5 The sleeve assembly 10 and the sealing assembly 20 are assembled by rotating the sleeve assembly 10 (in the direction indicated by the arrow in the middle) so that the flange 12 enters the receiving groove 211 through the notch of the receiving groove 211, and the inner side walls of the receiving groove 211 opposite to each other along the first direction are both against the flange 12, so that the sleeve assembly 10 and the sealing assembly 20 can be assembled. In this way, the disassembly process and the assembly process between the sleeve assembly 10 and the sealing assembly 20 can be more convenient.

[0084] The connection structure for the puncture device 100 provided in the embodiment of the present application, when the sleeve assembly 10 and the sealing assembly 20 need to be disassembled, the base 21 only needs to be rotated relative to the flange 12 in the second direction, so that the flange 12 can be moved out of the receiving groove 211 through the notch of the receiving groove 211, so that the sleeve assembly 10 and the sealing assembly 20 can be disassembled; when the sleeve assembly 10 and the sealing assembly 20 need to be assembled together, the base 21 only needs to be rotated relative to the flange 12 in the direction opposite to the second direction, so that the flange 12 can enter the receiving groove 211 through the notch of the receiving groove 211, so that the base 21 can be restricted from moving relative to the flange 12 in a direction parallel to the first direction, and the base 21 can be restricted from rotating relative to the flange 12 in the circumferential direction of the sleeve 11, so that the sleeve assembly 10 and the sealing assembly 20 can be assembled together. The connection structure provided in the embodiment of the present application can make the disassembly process and assembly process between the sleeve assembly 10 and the sealing assembly 20 more convenient.

[0085] Optionally, in the absence of external force, the friction between the inner wall of the accommodating groove 211 and the flange 12 can limit the rotation of the flange 12 relative to the accommodating groove 211 along the circumferential direction of the sleeve 11, thereby limiting the rotation of the sleeve assembly 10 relative to the sealing assembly 20 along the circumferential direction of the sleeve 11.

[0086] In this embodiment, the base 21 includes a connecting portion 210 , which protrudes from the first sleeve 11 in the direction away from the first direction. The receiving groove 211 is provided in the connecting portion 210 , and the length direction of the receiving groove 211 is parallel to the circumferential direction of the first sleeve 11 .

[0087] Please refer to Figure 6 , Figure 8 and Fig. 9 In some embodiments, the sealing assembly 20 includes an elastic portion 22, which is connected to the base 21. The elastic portion 22 has a free end 221, which abuts against the flange 12 to limit the base 21 from rotating relative to the flange 12 along the circumferential direction of the sleeve 11.

[0088] By adopting the above solution, the rotation of the base 21 relative to the flange 12 along the circumferential direction of the sleeve 11 can be further restricted by the friction force between the free end 221 and the flange 12 .

[0089] In this embodiment, the elastic portion 22 is connected to the connecting portion 210 .

[0090] Optionally, the elastic part 22 may be made of plastic, rubber or silicone, etc. The elastic part 22 and the connecting part 210 may be integrally formed, such as integral injection molding or integral machining; or, the elastic part 22 and the connecting part 210 may be connected by bonding, welding, clamping or screwing.

[0091] Please refer to Figure 4 , Figure 8 and Fig. 9 In some embodiments, a avoidance hole 212 is provided on the base 21, and the elastic portion 22 is located in the avoidance hole 212. The avoidance hole 212 penetrates the groove wall of the accommodating groove 211 along the radial direction of the sleeve 11, and the elastic portion 22 is abutted against the flange 12 along the radial direction of the sleeve 11.

[0092] By adopting the above solution, the space occupied by the base 21 and the elastic part 22 can be reduced, that is, the structure of the sealing assembly 20 can be made more compact.

[0093] Please refer to Fig. 9 Optionally, the elastic part 22 extends along the second direction, and the end of the elastic part 22 facing away from the second direction is connected to the base 21, and the end of the elastic part 22 facing the second direction is a free end 221. This arrangement can make the elastic part 22 occupy a smaller space and can tightly abut the flange 12.

[0094] Please refer to Figure 4 , Figure 8 , Fig. 9 and Fig.10 In order to further limit the rotation of the base 21 relative to the flange 12 along the circumferential direction of the sleeve 11 after the sleeve assembly 10 and the sealing assembly 20 are assembled together, in some embodiments, the flange 12 is provided with a first limiting groove 121, and the free end 221 is provided with a first stop portion 222. The first stop portion 222 is located in the first limiting groove 121 and abuts against the side wall of the first limiting groove 121 to limit the rotation of the base 21 relative to the flange 12 along the circumferential direction of the sleeve 11.

[0095] By adopting the above solution, the first stopper 222 can abut against the side wall of the first limiting groove 121 to limit the rotation of the base 21 relative to the flange 12 along the circumferential direction of the sleeve 11 .

[0096] It is understandable that when the sleeve assembly 10 and the sealing assembly 20 need to be disassembled, it is only necessary to press or push the elastic portion 22 first so that the first stop portion 222 moves out of the first limiting groove 121, and then rotate the base 21 along the second direction relative to the flange 12, so that the flange 12 can be moved out of the accommodating groove 211 through the notch of the accommodating groove 211.

[0097] Please continue to refer to Figure 4 , Figure 8 , Fig. 9 and Fig.10In some embodiments, the direction of the notch of the accommodating groove 211 is opposite to the second direction; the flange 12 is provided with a first limiting portion 122, the first limiting portion 122 is abutted against an end of the base 21 facing away from the second direction, and the first stopping portion 222 is abutted against the inner side wall of the first limiting groove 121 facing away from the second direction.

[0098] By adopting the above solution, after the sleeve assembly 10 and the sealing assembly 20 are assembled together, the base 21 can be further restricted from rotating relative to the flange 12 in a direction opposite to the second direction.

[0099] In order to facilitate the first stop portion 222 to enter the first limiting groove 121 when assembling the sleeve assembly 10 and the sealing assembly 20, optionally, a first inclined surface 123 is provided at the end of the flange 12 facing the second direction, and the distance between the end of the first inclined surface 123 facing the second direction and the first sleeve 11 is smaller than the distance between the end of the first inclined surface 123 facing away from the second direction and the first sleeve 11; by rotating the base 21 relative to the flange 12 in a direction opposite to the second direction, the first stop portion 222 can slide along the first inclined surface 123 into the first limiting groove 121.

[0100] Optionally, the end of the first stopper 222 facing away from the second direction is provided with a second inclined surface 223, and the distance between the end of the second inclined surface 223 facing the second direction and the first sleeve 11 is smaller than the distance between the end of the second inclined surface 223 facing away from the second direction and the first sleeve 11, and by rotating the base 21 relative to the flange 12 in a direction opposite to the second direction, the second inclined surface 223 and the first inclined surface 123 can be brought into contact and slide relative to each other, and the first stopper 222 can slide into the first limiting groove 121. With such a configuration, it is more convenient to make the first stopper 222 enter the first limiting groove 121 when the sleeve assembly 10 and the sealing assembly 20 are assembled.

[0101] Please refer to Figure 4 and Figure 8 In some embodiments, the number of flanges 12 is at least two, and at least two flanges 12 are spaced apart along the circumference of the first sleeve 11 , and the number of accommodating grooves 211 is equal to the number of flanges 12 .

[0102] By adopting the above solution, the tightness of the connection between the sleeve assembly 10 and the sealing assembly 20 can be improved after the sleeve assembly 10 and the sealing assembly 20 are assembled together.

[0103] Optionally, the number of the connecting portions 210 and the number of the elastic portions 22 are both equal to the number of the flanges 12 .

[0104] Please refer to Figure 4 , Figure 7 , Fig.11 and Fig.12 In some embodiments, the sealing assembly 20 further includes a first sealing member 23 and a cover plate 24. The base 21 is provided with a mounting hole 213. The first sealing member 23 is located in the mounting hole 213. The cover plate 24 is covered on the first sealing member 23, and the cover plate 24 is detachably connected to the base 21.

[0105] By adopting the above solution, the sealing assembly 20 can have better sealing performance.

[0106] Specifically, the cover plate 24 and the base 21 can be connected by clamping, screw connection or bolt connection. The first sealing member 23 can be a cross sealing ring, and an opening and closing structure 233 is provided in the middle of the first sealing member 23.

[0107] It is understandable that when the card poking assembly 30 or the puncture needle is inserted into the sleeve 11, the opening and closing structure 233 of the cross sealing ring will be poked open.

[0108] In this embodiment, the cover plate 24 is provided with a buckle 241, and the base 21 is provided with a slot 214 that is engaged with the buckle 241. Such an arrangement can make it more convenient to connect the cover plate 24 and the base 21.

[0109] Optionally, four buckles 241 are arranged at intervals, and the number of the slots 214 is equal to the number of the buckles 241 .

[0110] In order to limit the first seal 23 from rotating relative to the base 21 along the circumferential direction of the first sleeve 11, optionally, the first seal 23 is provided with a second limiting portion 231, and the base 21 is provided with a second limiting groove 215, and the second limiting portion 231 is located in the second limiting groove 215 to limit the first seal 23 from rotating relative to the base 21 along the circumferential direction of the first sleeve 11.

[0111] The sizes of the second limiting groove 215 can be set to two or more.

[0112] Please refer to Fig.13 Optionally, the first sealing member 23 includes a first annular portion 232 and a second annular portion 234, the first annular portion 232 is in close contact with the outer wall of the card body 32 or the puncture needle to form a seal, and the second annular portion 234 is in contact with the inner wall of the sleeve 11 to form a seal.

[0113] Please refer to Figure 1 and Figure 2 In the second aspect, the embodiment of the present application provides a puncture device 100, which includes the connection structure and the card punching assembly 30 as in the first aspect. The card punching assembly 30 sequentially penetrates the sealing assembly 20 and the sleeve assembly 10 along a third direction, and the third direction is opposite to the first direction. The third direction can be approximately Figure 1 and Figure 2In the top-to-bottom direction.

[0114] The puncture device 100 provided in the embodiment of the present application, when it is necessary to disassemble the sleeve assembly 10 and the sealing assembly 20, it is only necessary to rotate the base 21 relative to the flange 12 in the second direction, so that the flange 12 can be moved out of the receiving groove 211 through the notch of the receiving groove 211, so that the sleeve assembly 10 and the sealing assembly 20 can be disassembled; when it is necessary to assemble the sleeve assembly 10 and the sealing assembly 20 together, it is only necessary to rotate the base 21 relative to the flange 12 in the direction opposite to the second direction, so that the flange 12 can enter the receiving groove 211 through the notch of the receiving groove 211, so that the base 21 can be restricted from moving in a direction parallel to the first direction relative to the flange 12, and the base 21 can be restricted from rotating in the circumferential direction of the sleeve 11 relative to the flange 12, so that the sleeve assembly 10 and the sealing assembly 20 can be assembled together. The puncture device 100 provided in the embodiment of the present application can make the disassembly process and assembly process between the sleeve assembly 10 and the sealing assembly 20 more convenient.

[0115] Please refer to Figure 1 , Figure 2 , Fig.14 and Fig.15 In some embodiments, the poking card assembly 30 includes an annular wall body 31 and a poking card body 32. The annular wall body 31 penetrates into the sealing assembly 20 along a third direction, one end of the poking card body 32 is located inside the annular wall body 31, and the other end of the poking card body 32 extends out of the annular wall body 31 and penetrates into the sleeve assembly 10 along the third direction.

[0116] By adopting the above scheme, the inner diameter of the sleeve 11 corresponding to the puncture card body 32 is further reduced, and the inner diameter of the sleeve 11 is smaller than the diameter of the annular wall body 31. The inner diameter of the portion of the sleeve 11 inserted into the abdominal wall only needs to be slightly larger than the diameter of the puncture card body 32 and smaller than the diameter of the annular wall body 31. This can make the size of the sleeve 11 smaller, thereby reducing the diameter of the puncture device 100 and the size of the surgical incision.

[0117] It can be understood that after the other end of the card body 32 extends out of the annular wall body 31 and penetrates into the sleeve assembly 10 along the third direction, the annular wall body 31 contacts and seals with the second annular portion 234 on the cross sealing ring.

[0118] Please refer to Fig.16 , Fig.17 , Fig.18 and Fig.19In some embodiments, the puncture assembly 30 is provided with a main channel 33; the puncture device 100 also includes a guide assembly 40 arranged in the main channel 33, the guide assembly 40 includes a main body 41, the main body 41 is provided with a sub-channel 411 and a channel outlet 412, the sub-channel 411 is used for surgical instruments to pass through, and the main channel 33 and the sub-channel 411 are connected through the channel outlet 412.

[0119] By adopting the above solution, surgical instruments can enter the main channel 33 of the puncture card assembly 30 more conveniently.

[0120] It is understandable that the sub-channel 411 can accommodate rigid or flexible surgical instruments, and multiple sub-channels 411 can be arranged at intervals, such as 2, 3, 4, 5 or 6, and each channel can accommodate a surgical instrument. The surgical instrument can be inserted into the sub-channel 411 from the upper entrance of the guide assembly 40, and then pass through the main channel 33 of the puncture card assembly 30 until it enters the abdominal cavity. The puncture card body 32 has multiple main channels 33 corresponding to the sub-channels 411 to accommodate the surgical instrument.

[0121] Optionally, please also refer to Fig.24 and Fig.25 The guide assembly 40 includes a protective cover 46, a fixing ring 47 and a third sealing member 48. The protective cover 46 is fixed to the main body 41 through the fixing ring 47. The protective cover 46 is provided with a closable leaf 461. The third sealing member 48 is provided between the main body 41 and the card punching assembly 30. Such an arrangement can improve the sealing performance of the guide assembly 40.

[0122] It is understandable that the protective cover 46 may have a plurality of lobes 461. In this embodiment, the protective cover has four lobes 461, and each lobe 461 covers a sub-channel 411. When no surgical instrument is inserted, the lobes 461 are in a horizontal state, shielding the sub-channel 411 to prevent foreign matter from falling into the sub-channel 411. When the surgical instrument is inserted, no matter where the instrument enters the sub-channel 411, the lobes 461 can be poked open to enter the sub-channel 411. The third sealing member 48 may be a sealing ring.

[0123] Please refer to Fig.16 , Fig.17 and Fig.18In some embodiments, the guide assembly 40 also includes a sealing door 42, one end of which is rotatably connected to the main body 41; the guide assembly 40 also includes an opening and closing elastic member 43 and a handle 44, and the main body 41 and the sealing door 42 are both connected to the opening and closing elastic member 43, so that the sealing door 42 covers the channel outlet 412, and by rotating the sealing door 42 along the fourth direction relative to the main body 41, the opening and closing elastic member 43 can be compressed and the sealing door 42 can be moved away from the channel outlet 412, and the handle 44 is connected to the sealing door 42, and the handle 44 is used to drive the sealing door 42 to rotate relative to the main body 41 along the fourth direction.

[0124] By adopting the above scheme, when no surgical instrument passes through the main channel 33 and the sub-channel 411, the main channel 33 and the sub-channel 411 can be isolated by the sealing door 42, thereby improving the sealing performance of the puncture device 100 and ensuring the air-tightness during the puncture process. Without sacrificing the guiding function of the insertion of the medical instrument, the risk of foreign matter falling into the main channel 33 through the channel outlet 412 can be eliminated to a great extent. When the surgical instrument is stuck between the sealing door 42 and cannot be moved, the sealing door 42 can be driven to rotate by the handle 44 to move the sealing door 42 away from the channel outlet 412.

[0125] It should be noted that the opening and closing elastic member 43 may be a spring, a torsion spring, or elastic rubber, etc. When no surgical instrument enters the main passage 33, the sealing door 42 remains closed under the action of the torsion spring opening and closing elastic member 43, preventing the gas in the abdominal cavity from escaping through the passage outlet 412. When the surgical instrument enters the sub-passage and continues to go deeper downward, it will push open the sealing door 42, and then continue to go deeper downward into the main passage 33, and finally enter the abdominal cavity.

[0126] It is understandable that the sealing door 42 may be provided with a rotating shaft (not shown in the figure), and the handle 44 is connected to the rotating shaft.

[0127] Optionally, the inner wall surface of the sub-channel 411 includes an equal diameter cylindrical surface 414 and a variable diameter cylindrical surface 415 which are arranged in sequence along the first direction, the equal diameter cylindrical surface 414 and the variable diameter cylindrical surface 415 are arranged coaxially, and one end of the equal diameter cylindrical surface 414 facing the third direction defines a channel outlet 412. With such an arrangement, during the process of inserting the surgical instrument into the sub-channel 411, the surgical instrument can gradually slide along the variable diameter cylindrical surface 415 toward the center of the equal diameter cylindrical surface 414 and enter the main channel 33 from the channel outlet 412.

[0128] Please refer to Fig.19Optionally, the poking card assembly 30 is provided with an assembly hole 34 penetrating the inner wall of the main channel 33, the sealing door 42 is located in the main channel 33, and the handle 44 rotatably passes through the assembly hole and is connected to the sealing door 42. Such a configuration can make the handle 44 occupy a smaller space, thereby reducing the space occupied by the poking card assembly 30 and the guide assembly 40.

[0129] The handle 44 is provided with a sealing ring, which is located between the card body 32 and the main body 41 to prevent the escape of intra-abdominal gas. During installation, the sealing ring is first assembled on the handle 44, and then the sealing door 42 and the handle 44 are inserted into the assembly hole 34 of the card body 32, and finally the guide assembly 40 is inserted into the card body 32.

[0130] Please refer to Fig. 20 and Fig.21 Optionally, the handle 44 is provided with a third limiting groove 441 located in the main passage 33, and the main body 41 is provided with a third limiting portion 413, and the third limiting portion 413 is located in the third limiting groove 441 to limit the movement of the handle 44 in a direction away from the main body 41. Such a configuration can prevent the handle 44 from being disconnected from the sealing door 42 due to movement in a direction away from the main body 41.

[0131] Specifically, the third limiting groove 441 may be an annular groove.

[0132] Please refer to Fig. 22 Optionally, the rotating shaft of the sealing door 42 is provided with an inserting portion 421, and the handle 44 is provided with an inserting portion 442 that is inserted and matched with the inserting portion 421. In this way, the sealing door 42 and the handle 44 can be connected together more conveniently.

[0133] Specifically, the insertion portion 421 may be a hole or a slot, and the insertion portion 442 may be a block or the like.

[0134] Please refer to Fig.23 and Fig.24 In order to prevent the sealing door 42 from being unable to cover the channel outlet 412 when a slight deflection occurs due to processing and assembly gaps, in some embodiments, the guide assembly 40 also includes a second sealing member 45, which is sleeved on the main member 41 along the first direction, and the second sealing member 45 is provided with a protrusion 451 and an opening 452, the protrusion 451 is abutted against the sealing door 42, the sealing door 42 is covered on the opening 452, and the channel outlet 412 is located in the space enclosed by the sealing door 42 and the second sealing member 45.

[0135] By adopting the above solution, when the sealing door 42 is slightly deflected due to processing and assembly clearance, the protrusion 451 can still be in close contact with the sealing door 42, thereby preventing the main channel 33 and the sub-channel 411 from being connected.

[0136] It should be noted that the material of the second sealing member 45 can be rubber, silicone or other elastic materials, and the protrusion 451 can be set to be thinner and softer. The inner surface shape of the second sealing member 45 is the same as the outer surface shape of the corresponding position of the main body 41, so that the second sealing member 45 can be sleeved on the main body 41, and the sealing door 42 contacts the second sealing member 45 to form a seal.

[0137] It can be understood that when a plurality of sub-channels 411 are provided, the number of the protrusions 451 and the number of the openings 452 are equal to the number of the sub-channels 411 .

[0138] Please refer to Figure 1 , Figure 2 and Figure 7 In some embodiments, the sealing assembly 20 is provided with a connecting elastic member 242, which is connected to the base 21, and the connecting elastic member 242 is pressed against the surface of the poking card assembly 30 facing the first direction to limit the movement of the poking card assembly 30 relative to the base 21 along the first direction.

[0139] By adopting the above solution, the card poking assembly 30 can be better restricted from moving relative to the base 21 along the first direction.

[0140] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A connection structure for a trocar, characterized in that: The connection structure comprises a sleeve assembly and a sealing assembly arranged in sequence along a first direction; The sleeve assembly comprises a sleeve and a flange arranged at one end of the sleeve; The sealing assembly comprises a base, the base is provided with a receiving groove, the receiving groove is used to receive the flange, and the two inner side walls of the receiving groove opposite to each other along the first direction are both against the flange; wherein, The flange can be moved out of the receiving groove through the notch of the receiving groove by rotating the base relative to the flange in a second direction, and the second direction is parallel to the circumferential direction of the sleeve.

2. The connection structure according to claim 1, characterized in that: The sealing assembly comprises an elastic part connected to the base, and the elastic part has a free end, and the free end abuts against the flange to limit the base from rotating relative to the flange along the circumferential direction of the sleeve.

3. The connection structure according to claim 2, characterized in that: The base is provided with an avoidance hole, the elastic part is located in the avoidance hole, the avoidance hole penetrates the groove wall of the accommodating groove along the radial direction of the sleeve, and the elastic part abuts against the flange along the radial direction of the sleeve.

4. The connection structure according to claim 3, characterized in that: The elastic portion extends along the second direction, and one end of the elastic portion facing away from the second direction is connected to the base, and one end of the elastic portion facing the second direction is the free end.

5. The connection structure according to claim 2, characterized in that: The flange is provided with a first limiting groove, and the free end is provided with a first stop portion, the first stop portion is located in the first limiting groove and abuts against the side wall of the first limiting groove to limit the base from rotating relative to the flange along the circumferential direction of the sleeve.

6. The connection structure according to claim 5, characterized in that: The direction of the notch of the accommodating groove is opposite to the second direction; the flange is provided with a first limiting portion, the first limiting portion is abutted against an end of the base facing away from the second direction, and the first stopping portion is abutted against the inner side wall of the first limiting groove facing away from the second direction.

7. A trocar, characterized in that: The trocar comprises: The connection structure according to any one of claims 1 to 6; A poking card assembly is inserted into the sealing assembly and the sleeve assembly in sequence along a third direction, and the third direction is opposite to the first direction.

8. The trocar according to claim 7, characterized in that: The poking card assembly includes an annular wall body and a poking card body, the annular wall body penetrates the sealing assembly along the third direction, one end of the poking card body is located inside the annular wall body, and the other end of the poking card body extends out of the annular wall body and penetrates the sleeve assembly along the third direction.

9. The trocar according to claim 7, characterized in that: The puncture card assembly is provided with a main channel; the puncture device also includes a guide assembly arranged in the main channel, the guide assembly includes a main body, the main body is provided with a sub-channel and a channel outlet, the sub-channel is used for surgical instruments to pass through, and the main channel and the sub-channel are connected through the channel outlet.

10. The trocar according to claim 9, characterized in that: The guide assembly also includes a sealing door, one end of which is rotatably connected to the main body; the guide assembly also includes an opening and closing elastic member and a handle, and the main body and the sealing door are both connected to the opening and closing elastic member, so that the sealing door cover is arranged at the channel outlet, and by rotating the sealing door along a fourth direction relative to the main body, the opening and closing elastic member can be compressed and the sealing door can be moved away from the channel outlet, and the handle is connected to the sealing door, and the handle is used to drive the sealing door to rotate relative to the main body along the fourth direction.

11. The trocar according to claim 10, characterized in that: The poking card assembly is provided with an assembly hole penetrating the inner wall of the main channel, the sealing door is located in the main channel, and the handle can rotatably pass through the assembly hole and be connected to the sealing door.

12. The trocar according to claim 11, characterized in that: The handle is provided with a third limiting groove located in the main channel, and the main body is provided with a third limiting portion, and the third limiting portion is located in the third limiting groove to limit the movement of the handle in a direction away from the main body.

13. The trocar according to any one of claims 9 to 12, characterized in that: The guide assembly also includes a second sealing member, which is sleeved on the main body along the first direction. The second sealing member is provided with a protrusion and an opening. The protrusion is abutted against the sealing door. The sealing door cover is arranged on the opening, and the channel outlet is located in the space enclosed by the sealing door and the second sealing member.

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