Pressure-resistant sealing ring for trocar, trocar sheath and trocar

Abstract

The pressure-resistant sealing ring of the present invention comprises an incision, a supporting surface, an end sealing surface and a reset mechanism. The central part of the supporting surface is provided with an incision, and the edge of the supporting surface is connected to the end sealing surface. The reset mechanism is arranged on the outer side of the supporting inclined surface, and the reset mechanism usually realizes the reset support of the supporting inclined surface by mutually cooperating positioning edges with a certain height. The mutually cooperating positioning edges have mutually cooperating matching surfaces. When the instrument is removed, the incision is closed, the positioning edges return to the initial position, the matching surfaces are close to each other, forming a surface contact to prevent displacement in the height direction, and under the action of the intra-abdominal static pressure, the matching surfaces are mutually supported, and under the reinforced support of the positioning edges, the incision is not easy to be misplaced, so that the sealing performance of the pressure-resistant sealing ring under high static pressure state can be better guaranteed. Therefore, the puncture device of the present invention containing the pressure-resistant sealing ring of the present invention also has good stable sealing performance under high static pressure state.

Description

Technical Field

[0001] The invention relates to a laparoscopic surgical instrument, in particular to a pressure-resistant sealing ring of a puncture device used in laparoscopic surgery, and a puncture device sheath tube and a puncture device containing the pressure-resistant sealing ring. Background Art

[0002] Laparoscopic surgery has been used more and more widely. In order to avoid nosocomial infection, the use of disposable trocars in laparoscopic surgery is also increasing. According to different surgical requirements, the types of surgical instruments passing through the trocar are increasing, and the shapes are becoming more and more complex. During the use of the trocar, the component that contacts the surgical instrument most frequently is the sealing ring. In order to ensure the smoothness of the operation, silicone materials are often used in the design of the trocar to make the sealing ring to reduce the movement resistance of the instrument.

[0003] However, since the silicone material is very soft, while it reduces the resistance to movement, the positioning ability of the incision of the sealing ring is relatively weak. When the static pressure in the abdominal cavity is high, such as reaching 4KPa, the incision of the silicone sealing ring may be dislocated. Especially when the silicone sealing ring contains lubricating fluid, the incision of the silicone sealing ring is prone to dislocation, resulting in reduced sealing performance and even sealing failure. In severe cases, the operation will be interrupted, causing clinical accidents.

[0004] This patent application is a further improvement on the sealing ring in the puncture device of the prior art, so as to improve the sealing stability of the sealing ring under a higher intra-abdominal static pressure state, better prevent the sealing failure of the sealing ring under a higher intra-abdominal static pressure state, and ensure the smooth progress of the operation. Summary of the invention

[0005] The pressure-resistant sealing ring for the puncture device of the present invention is characterized in that a reset mechanism including a positioning edge is provided on the outer side of the sealing ring support surface, and the mutual support between the mating surfaces of the positioning edge makes it difficult for the incision of the sealing ring to be misplaced even under a high intra-abdominal static pressure state, thereby effectively preventing the sealing failure of the sealing ring under a high intra-abdominal static pressure state.

[0006] The pressure-resistant sealing ring for the trocar of the present invention is characterized in that: the pressure-resistant sealing ring 1 comprises a cutout 11, a support surface 12, an end sealing surface 13 and a reset mechanism 20;

[0007] A. The incision 11 through which surgical instruments can pass is provided at the central part of the support surface 12;

[0008] B. The reset mechanism 20 is arranged on the support surface 12;

[0009] C. The cutout 11 is provided at the central portion of the support surface 12 , and the edge of the support surface 12 is connected to the end sealing surface 13 .

[0010] When the instrument enters, the reset mechanism 20 can expand outwardly without hindering the movement of the instrument. When the instrument is withdrawn, the reset mechanism 20 returns to the supporting state and can provide support for the supporting surface 12, so that the incision 11 is not easily dislocated and can maintain good sealing performance even under higher intra-abdominal static pressure conditions.

[0011] The reset mechanism 20 is arranged outside the support surface 12. The reset mechanism 20 is preferably arranged outside the support surface 12, so that the inner side of the pressure-resistant sealing ring 1 can be kept smooth and the reset mechanism 20 is prevented from hindering the in and out movement of the instrument.

[0012] The reset mechanism 20 includes a positioning edge 20 - 1 .

[0013] Each of the reset devices 20 includes at least one pair of mutually cooperating positioning edges 20 - 1 .

[0014] The height of the mating surface 20 - 11 of the positioning edge 20 - 1 is not less than 0.3 mm.

[0015] The reset mechanism 20 is usually implemented by the mutually cooperating positioning edges 20-1 with a certain height to realize the reset support of the support surface 12. The mutually cooperating positioning edges 20-1 each have a mutually cooperating mating surface 20-11, and the mating surface 20-11 has a certain height, and the height is usually above 0.3mm, which has a good supporting effect. When the instrument is removed, the incision 11 is closed, the positioning edges 20-1 return to the initial position, and the mating surfaces 20-11 are close to each other. When the intra-abdominal static pressure is high, such as reaching 4KPa, under the action of the intra-abdominal static pressure, the mating surfaces 20-11 are mutually supported to form a surface contact, which is not easy to shift in the height direction. Under the reinforced support of the positioning edges 20-1, the incision 11 is not easy to be misplaced, so that the sealing of the pressure-resistant sealing ring 1 under the high static pressure state can be better guaranteed.

[0016] The positioning rib 20 - 1 is integrally manufactured with the support surface 12 . Usually, the positioning rib 20 - 1 is directly integrally manufactured on the outer side of the support surface 12 , and can move along with the movement of the support surface 12 .

[0017] The pressure-resistant sealing ring 1 has at least one cutout 11. The pressure-resistant sealing ring 1 has at least one cutout 11 for the passage of instruments. In order to reduce the movement resistance of instruments when passing through, a plurality of cutouts 11 can be provided, and the cutouts 11 are arranged in different directions so that instruments can enter and exit more conveniently.

[0018] The pressure-resistant sealing ring 1 comprises two cutouts 11, and the two cutouts 11 are arranged in a cross pattern. When an instrument enters, the cutouts 11 open to four sides at the same time, so that instruments of any shape can enter and exit easily, and the movement resistance is very small.

[0019] The support surface 12 of the pressure-resistant sealing ring 1 forms four pairs of supporting inclined surfaces 12-1 along the two cross-shaped incisions 11; each pair of the supporting inclined surfaces 12-1 is connected to each other, and a connecting edge 12-11 is formed at the connection point, and the supporting inclined surface 12-1 is recessed toward the inner side of the sealing ring 1 along the connecting edge 12-11; the connecting edge 12-11 forms an instrument contact edge 12-3 on the inner side, and the contact edge 12-3 protrudes inward to reduce the contact area between the instrument and the sealing ring 1; the outer side of the supporting inclined surface 12-1 is symmetrically distributed with the positioning edges 20-1 of the reset mechanism 20 along both sides of the connecting edge 12-11, and the position of the positioning groove 20-2 formed between the positioning edges 20-1 coincides with the connecting edge 12-11 and is arranged on the outer side of the supporting inclined surface 12-1.

[0020] When the instrument enters, the support slope 12-1 moves outward and expands, and the incision 11 opens to all sides at the same time, and the positioning edge 20-1 arranged on the outside of the support slope 12-1 also moves outward accordingly. Since the instrument only contacts the front end of the contact edge 12-3 formed on the inner side of the connecting edge 12-11, the contact area is very small, and the movement friction is very small. The instrument can smoothly enter the body from the incision 11 to maintain low movement resistance. When the instrument is removed, the support slope 12-1 quickly sinks inward along the connecting edge 12-11, so that the incision 11 quickly returns to the closed state, and the positioning edge 20-1 also moves inward accordingly, and the return returns to the reset support state. Under the action of intra-abdominal static pressure, the mating surfaces 20-11 fit together to form a surface contact, which provides a good support for the incision 11. Even if the pressure is high, due to the good support between the mating surfaces 20-11, the incision 11 is not easy to be misaligned with each other, thereby effectively ensuring that the incision 11 can remain closed even under high pressure, thereby having a good clinical sealing effect.

[0021] The pressure-resistant sealing ring 1 comprises three cutouts 11, and the three cutouts 11 are arranged at the apex in a Y-shaped cross. When the instrument enters, the cutouts 11 open in three directions of the Y-shaped shape at the same time, which can also ensure very low movement resistance.

[0022] The support surface 12 of the pressure-resistant sealing ring 1 forms three pairs of supporting inclined surfaces 12-1 along the three Y-shaped crossed cutouts 11; each pair of the supporting inclined surfaces 12-1 is connected to each other, and a connecting ridge 12-11 is formed at the connection point, and the supporting inclined surface 12-1 is recessed toward the inner side of the sealing ring 1 along the connecting ridge 12-11; the connecting ridge 12-11 forms an instrument contact ridge 12-3 on the inner side, and the contact ridge 12-3 bulges inward to reduce the contact area between the instrument and the sealing ring 1; the outer side of the supporting inclined surface 12-1 is symmetrically distributed with the positioning ridges 20-1 of the reset mechanism 20 along both sides of the connecting ridge 12-11, and the position of the positioning groove 20-2 formed between the positioning ridges 20-1 coincides with the connecting ridge 12-11 and is arranged on the outer side of the supporting inclined surface 12-1.

[0023] When the instrument enters, the support slope 12-1 moves outward and expands, and the incision 11 expands in three directions along the Y-shaped structure. The positioning edge 20-1 arranged on the outside of the support slope 12-1 also moves outward accordingly. Since the instrument only contacts the front end of the contact edge 12-3 formed on the inner side of the connecting edge 12-11, the contact area is very small, and the movement friction is very small. The instrument can smoothly enter the body from the incision 11 to maintain low movement resistance. When the instrument is removed, the support slope 12-1 quickly sinks inward along the connecting edge 12-11, so that the incision 11 quickly returns to the closed state, and the positioning edge 20-1 also moves inward accordingly, and returns to the reset support state. Under the action of intra-abdominal static pressure, the mating surfaces 20-11 fit each other to form a surface contact mode, which provides a good support for the incision 11. Even if the pressure is high, due to the good support between the mating surfaces 20-11, the incisions 11 are not easily misaligned, thereby effectively ensuring that the incisions 11 can remain closed even under high pressure, thereby having a good clinical sealing effect.

[0024] Moreover, the Y-shaped structure is a three-way structure that cooperates with each other. It has a better spatial fixing effect than the cross structure and has better stability for sealing rings with large diameters.

[0025] The pressure-resistant sealing ring 1 further comprises a sealing convex edge 14 ; the sealing convex edge 14 is arranged on the inner side of the end sealing surface 13 and protrudes upward. The sealing convex edge 14 can further enhance the sealing effect of the end of the pressure-resistant sealing ring 1 .

[0026] The sealing flange 14 is an annular structure, and a guide angle 14 - 1 is provided on the raised edge of the sealing flange 14 .

[0027] The pressure-resistant sealing ring 1 also includes a flange 15, a flange reinforcement rib 16, and a mounting groove 17; the flange 15 is arranged on the outer side of the end sealing surface 13 and protrudes downward; the flange reinforcement rib 16 is arranged below the flange 15 and connected to the flange 15; a mounting groove 17 is formed between the sealing convex edge 14, the end sealing surface 13, the flange 15 and the flange reinforcement rib 16; the central part of the support surface 12 is connected to the incision 11, and the edge of the support surface 12 is sequentially connected to the sealing convex edge 14, the end sealing surface 13, the flange 15, and the flange reinforcement rib 16. Due to the presence of the flange reinforcement rib 16, the embracing force of the pressure-resistant sealing ring 1 during installation is increased, thereby greatly increasing the resistance of the pressure-resistant sealing ring 1 when it falls off, which can better prevent the pressure-resistant sealing ring 1 from slipping off, and is safer to use clinically.

[0028] The flange reinforcement rib 16 is provided with an installation notch 16-2. The installation notch 16-2 can make the installation process more convenient.

[0029] The end sealing surface 13, the flange 15 and the flange reinforcement rib 16 are all annular structures.

[0030] The pressure-resistant sealing ring 1 is made of medical elastic material. In particular, the pressure-resistant sealing ring 1 can be made of medical silicone, which ensures low movement resistance and provides a good static pressure stability through the reset mechanism 20. The medical material also has good clinical biosafety.

[0031] The sheath tube of the puncture device of the present invention contains the pressure-resistant sealing ring 1.

[0032] The sheath tube 100 is composed of an end sealing component 101 and a sleeve component 102 .

[0033] The bushing assembly 102 includes the pressure-resistant sealing ring 1 , the bushing cover 2 , the bushing 3 , the bushing sleeve 4 and the switch 5 .

[0034] Furthermore, the pressure-resistant sealing ring 1 is embedded and fixed in the end of the sleeve 3 by a concave-convex fit between the sleeve cover 2 and the sleeve outer sleeve 4, wherein the convex step 2-1 on the sleeve cover 2 is embedded in the connecting groove 4-1 of the sleeve outer sleeve 4; the mounting groove 17 of the pressure-resistant sealing ring 1 forms a matching seal with the sealing convex step 3-1 of the sleeve 3; the flange 15 of the pressure-resistant sealing ring 1 and the strength weak area 16-1 of the connecting area between the flange 15 and the flange reinforcement rib 16 are pressed by the outer wall 2-2 of the sleeve cover 2; the flange reinforcement rib 16 of the pressure-resistant sealing ring 1 is installed in the gap between the sleeve cover 2 and the sleeve outer sleeve 4.

[0035] The puncture device of the present invention comprises a sheath tube 100 of the puncture device. Further, the puncture device 900 is composed of the sheath tube 100 and the puncture rod 200.

[0036] The pressure-resistant sealing ring of the present invention comprises a cutout 11, a support surface 12, an end sealing surface 13 and a reset mechanism 20. The central part of the support surface 12 is provided with the cutout 11, and the edge of the support surface 12 is connected to the end sealing surface 13. The reset mechanism 20 is arranged on the outer side of the support surface 12, and the reset mechanism 20 is usually implemented by the mutually cooperating positioning ribs 20-1 with a certain height to realize the reset support of the support surface 12. The mutually cooperating positioning ribs 20-1 each have a mutually cooperating mating surface 20-11, and the mating surface 20-11 has a certain height, and usually the height is above 0.3mm, which has a good supporting effect. When the instrument is removed, the incision 11 is closed, the positioning edge 20-1 returns to the initial position, and the mating surfaces 20-11 are close to each other. When the intra-abdominal static pressure is high, such as reaching 4KPa, under the action of the intra-abdominal static pressure, the mating surfaces 20-11 are mutually supported and form surface contact, which is not easy to shift in the height direction. Under the reinforced support of the positioning edge 20-1, the incision 11 is not easy to be misplaced, so that the sealing performance of the pressure-resistant sealing ring 1 under high static pressure can be better guaranteed. The puncture device of the present invention containing the pressure-resistant sealing ring of the present invention also has good stable sealing performance under high static pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional structural schematic diagram of the pressure-resistant sealing ring of the present invention with a cross-shaped incision.

[0038] Figure 1-1 yes Figure 1 Enlarged view of point A.

[0039] Figure 1-2 yes Figure 1 main view.

[0040] Figure 1-3 yes Figure 1-2 BB cross-sectional view.

[0041] Figure 1-4 It is a schematic structural diagram of the pressure-resistant sealing ring of the present invention when the cutout is opened.

[0042] Figure 1-5 It is a schematic structural diagram of the sheath tube of the present invention containing a cross-shaped incision pressure-resistant sealing ring.

[0043] Figure 1-6 The present invention is a schematic structural diagram of a puncture device having a cross-shaped incision pressure-resistant sealing ring.

[0044] Figure 2 It is a three-dimensional structural schematic diagram of the pressure-resistant sealing ring of the present invention with a Y-shaped incision.

[0045] Figure 2-1 yes Figure 2 Enlarged view of point C.

[0046] Figure 2-2 yes Figure 2 Top view of the .

[0047] Figure 2-3 yes Figure 2-2 DD cross-sectional view.

[0048] Figure 2-4 It is a schematic structural diagram of the sheath tube of the present invention including a Y-shaped incision pressure-resistant sealing ring.

[0049] Figure 2-5 It is a schematic structural diagram of the puncture device of the present invention including a Y-shaped incision pressure-resistant sealing ring.

[0050] In the above figure:

[0051] 100 is the puncture sheath of the present invention, 101 is the end sealing assembly of the puncture sheath of the present invention, 102 is the sleeve assembly of the puncture sheath of the present invention, 200 is the puncture rod of the puncture of the present invention, and 900 is the puncture of the present invention.

[0052] 1 is a pressure-resistant sealing ring for the trocar of the present invention, 2 is a sleeve cover, 3 is a sleeve, 4 is a sleeve jacket, and 5 is a switch.

[0053] 11 is a cutout, 12 is a supporting surface, 13 is an end sealing surface, 14 is a sealing protrusion, 15 is a flange, 16 is a flange reinforcement rib, 17 is a mounting groove, and 20 is a reset mechanism.

[0054] 12-1 is a supporting slope, 12-11 is a connecting edge, and 12-3 is a contact edge.

[0055] 14-1 is the guide angle on the sealing protrusion.

[0056] 16-2 is the notch of the flange reinforcement rib.

[0057] 20-1 is a positioning edge, and 20-11 is a matching surface.

[0058] 2-1 is a convex step on the casing cover, and 2-2 is an outer wall of the casing cover.

[0059] 3-1 is the sealing convex step of the casing.

[0060] 4-1 is the connection groove of the casing outer sleeve DETAILED DESCRIPTION

[0061] Example 1: Pressure-resistant sealing ring of the present invention with a cross-shaped cutout

[0062] refer to Figure 1 to Figure 1-4 The pressure-resistant sealing ring 1 of this embodiment includes a cutout 11 , a supporting surface 12 , an end sealing surface 13 and a reset mechanism 20 .

[0063] The incision 11 through which surgical instruments can pass is provided in the central portion of the support surface 12 .

[0064] The cutout 11 is disposed at a central portion of the support surface 12 , and the edge of the support surface 12 is connected to the end sealing surface 13 .

[0065] In this embodiment, the reset mechanism 20 is arranged outside the support surface 12. The reset mechanism 20 is preferably arranged outside the support surface 12, so that the inner side of the pressure-resistant sealing ring 1 can be kept smooth and the reset mechanism 20 is prevented from hindering the in and out movement of the instrument.

[0066] The reset mechanism 20 includes a positioning edge 20 - 1 .

[0067] In this embodiment, each of the reset devices 20 includes a pair of positioning edges 20 - 1 that cooperate with each other.

[0068] The height of the mating surface 20 - 11 of the positioning edge 20 - 1 is not less than 0.3 mm.

[0069] The reset mechanism 20 is usually composed of mutually cooperating positioning edges 20-1 with a certain height to realize the reset support of the support surface 12. The mutually cooperating positioning edges 20-1 each have a mutually cooperating mating surface 20-11, and the mating surface 20-11 has a certain height, usually a height of more than 0.3 mm, which has a good supporting effect.

[0070] In this embodiment, the positioning edge 20-1 and the support surface 12 are made of medical silicone. Usually, the positioning edge 20-1 is directly and integrally manufactured on the outer side of the support surface 12, and can move well along with the movement of the support surface 12. The medical silicone material provides a good static pressure stability through the reset mechanism 20 while ensuring low movement resistance, and the medical silicone material also has very good clinical biological safety.

[0071] refer to Figure 1 In this embodiment, the pressure-resistant sealing ring 1 includes two cutouts 11, and the two cutouts 11 are arranged in a cross pattern. When an instrument enters, the cutouts 11 open to four sides at the same time, so that instruments of any shape can enter and exit easily, and the movement resistance is very small.

[0072] refer to Figure 1 and Figure 1-1 The support surface 12 of the pressure-resistant sealing ring 1 forms four pairs of supporting inclined surfaces 12-1 along the two cross-shaped incisions 11; each pair of the supporting inclined surfaces 12-1 is connected to each other, and a connecting ridge 12-11 is formed at the connection point, and the supporting inclined surface 12-1 is recessed toward the inner side of the sealing ring 1 along the connecting ridge 12-11; the connecting ridge 12-11 forms an instrument contact ridge 12-3 on the inner side, and the contact ridge 12-3 bulges inward to reduce the contact area between the instrument and the sealing ring 1; the outer side of the supporting inclined surface 12-1 is symmetrically distributed with the positioning ridges 20-1 of the reset mechanism 20 along both sides of the connecting ridge 12-11, and the position of the positioning groove 20-2 formed between the positioning ridges 20-1 coincides with the connecting ridge 12-11 and is arranged on the outer side of the supporting inclined surface 12-1.

[0073] refer to Figure 1-4When the instrument enters, the support slope 12-1 moves outward and expands, and the incision 11 opens to all sides at the same time, and the positioning edge 20-1 arranged on the outside of the support slope 12-1 also moves outward accordingly. Since the instrument only contacts the front end of the contact edge 12-3 formed on the inner side of the connecting edge 12-11, the contact area is very small, and the movement friction is very small. The instrument can smoothly enter the body from the incision 11 to maintain low movement resistance. When the instrument is removed, the support slope 12-1 quickly sinks inward along the connecting edge 12-11, so that the incision 11 quickly returns to the closed state, and the positioning edge 20-1 also moves inward accordingly, and the return returns to the reset support state. Under the action of intra-abdominal static pressure, the mating surfaces 20-11 fit together to form a surface contact mode, which is not easy to shift in the height direction, and provides a good support for the incision 11. Even if the pressure is high, due to the good support between the mating surfaces 20-11, the incision 11 is not easy to be dislocated with each other, thereby effectively ensuring that the incision 11 can remain closed even under high pressure, thereby having a good clinical sealing effect.

[0074] refer to Figure 1-3 In this embodiment, the pressure-resistant sealing ring 1 further comprises a sealing convex edge 14; the sealing convex edge 14 is arranged on the inner side of the end sealing surface 13 and protrudes upward. The sealing convex edge 14 can further enhance the end sealing effect of the pressure-resistant sealing ring 1.

[0075] The sealing flange 14 is an annular structure, and a guide angle 14 - 1 is provided on the raised edge of the sealing flange 14 .

[0076] The pressure-resistant sealing ring 1 also includes a flange 15, a flange reinforcement rib 16, and a mounting groove 17; the flange 15 is arranged on the outer side of the end sealing surface 13 and protrudes downward; the flange reinforcement rib 16 is arranged below the flange 15 and connected to the flange 15; a mounting groove 17 is formed between the sealing convex edge 14, the end sealing surface 13, the flange 15 and the flange reinforcement rib 16; the central part of the support surface 12 is connected to the incision 11, and the edge of the support surface 12 is sequentially connected to the sealing convex edge 14, the end sealing surface 13, the flange 15, and the flange reinforcement rib 16. Due to the presence of the flange reinforcement rib 16, the embracing force of the pressure-resistant sealing ring 1 during installation is increased, thereby greatly increasing the resistance of the pressure-resistant sealing ring 1 when it falls off, which can better prevent the pressure-resistant sealing ring 1 from slipping off, and is safer to use clinically.

[0077] The end sealing surface 13, the flange 15 and the flange reinforcement rib 16 are all annular structures. The flange reinforcement rib 16 is provided with an installation notch 16-2. The installation notch 16-2 can make the installation process more convenient.

[0078] The pressure-resistant sealing ring of this embodiment forms a good supporting and fixing effect on the supporting edge 12 through the mutually cooperating positioning edges 20-1, effectively ensuring that the incision 11 can remain closed even under higher pressure, thereby having a good clinical sealing effect.

[0079] Example 2: Pressure-resistant sealing ring of the present invention with a Y-shaped cutout

[0080] refer to Figure 2 to Figure 2-3 The difference between this embodiment and embodiment 1 is that, in this embodiment, the incision 11 is a Y-shaped incision.

[0081] refer to Figure 2 and Figure 2-1 In this embodiment, the pressure-resistant sealing ring 1 includes three cutouts 11, and the three cutouts 11 are arranged at the apex in a Y-shaped cross. When the instrument enters, the cutouts 11 open in three directions of the Y-shaped shape at the same time, which can also ensure very low movement resistance.

[0082] refer to Figure 2 and Figure 2-2 The support surface 12 of the pressure-resistant sealing ring 1 forms three pairs of supporting inclined surfaces 12-1 along the three Y-shaped cross cuts 11; each pair of the supporting inclined surfaces 12-1 is connected to each other, and a connecting ridge 12-11 is formed at the connection point, and the supporting inclined surface 12-1 is recessed toward the inner side of the sealing ring 1 along the connecting ridge 12-11; the connecting ridge 12-11 forms an instrument contact ridge 12-3 on the inner side, and the contact ridge 12-3 bulges inward to reduce the contact area between the instrument and the sealing ring 1; the outer side of the supporting inclined surface 12-1 is symmetrically distributed with the positioning ridges 20-1 of the reset mechanism 20 along both sides of the connecting ridge 12-11, and the position of the positioning groove 20-2 formed between the positioning ridges 20-1 coincides with the connecting ridge 12-11 and is arranged on the outer side of the supporting inclined surface 12-1.

[0083] When the instrument enters, the support slope 12-1 moves outward and expands, and the incision 11 expands in three directions along the Y-shaped structure. The positioning edge 20-1 arranged on the outside of the support slope 12-1 also moves outward accordingly. Since the instrument only contacts the front end of the contact edge 12-3 formed on the inner side of the connecting edge 12-11, the contact area is very small, and the movement friction is very small. The instrument can smoothly enter the body from the incision 11 to maintain low movement resistance. When the instrument is removed, the support slope 12-1 quickly sinks inward along the connecting edge 12-11, so that the incision 11 quickly returns to the closed state, and the positioning edge 20-1 also moves inward accordingly, and returns to the reset support state. Under the action of intra-abdominal static pressure, the mating surfaces 20-11 fit each other to form a surface contact mode, which is not easy to shift in the height direction, and forms a good support effect for the incision 11. Even if the pressure is high, due to the good support between the mating surfaces 20-11, the incisions 11 are not easily misaligned, thereby effectively ensuring that the incisions 11 can remain closed even under high pressure, thereby having a good clinical sealing effect.

[0084] Moreover, the Y-shaped structure is a three-way structure that cooperates with each other and has a better spatial fixing effect than the cross structure. Therefore, compared with Example 1, the pressure-resistant sealing ring of this embodiment has better stability under large diameter conditions.

[0085] Example 3: Sheath of the trocar of the present invention

[0086] refer to Figure 1-5 The sheath tube 100 of the puncture device contains the pressure-resistant sealing ring 1 described in Example 1.

[0087] refer to Figure 2-4 The sheath tube 100 of the puncture device contains the pressure-resistant sealing ring 1 described in Example 2.

[0088] The sheath tube 100 is composed of an end sealing component 101 and a sleeve component 102 .

[0089] The bushing assembly 102 includes the pressure-resistant sealing ring 1 , the bushing cover 2 , the bushing 3 , the bushing sleeve 4 and the switch 5 .

[0090] Furthermore, the pressure-resistant sealing ring 1 is embedded and fixed in the end of the sleeve 3 by a concave-convex fit between the sleeve cover 2 and the sleeve outer sleeve 4, wherein the convex step 2-1 on the sleeve cover 2 is embedded in the connecting groove 4-1 of the sleeve outer sleeve 4; the installation groove 17 of the pressure-resistant sealing ring 1 forms a matching seal with the sealing convex step 3-1 of the sleeve 3; the flange 15 of the pressure-resistant sealing ring 1 is pressed by the outer wall 2-2 of the sleeve cover 2; and the flange reinforcement rib 16 of the pressure-resistant sealing ring 1 is installed in the gap between the sleeve cover 2 and the sleeve outer sleeve 4.

[0091] Since the installation groove 17 of the pressure-resistant sealing ring 1 forms a matching seal with the sealing convex step 3-1 of the sleeve 3; the flange 15 of the pressure-resistant sealing ring 1 is pressed by the outer wall 2-2 of the sleeve cover 2; the flange reinforcement rib 16 of the pressure-resistant sealing ring 1 is installed in the gap between the sleeve cover 2 and the sleeve sleeve 4; in particular, the presence of the flange reinforcement rib 16 increases the embracing force of the pressure-resistant sealing ring 1 during installation, thereby greatly increasing the resistance of the pressure-resistant sealing ring 1 when it falls off.

[0092] Since the sheath tube of the trocar of the present embodiment contains the pressure-resistant sealing ring 1, it can maintain a good and stable sealing effect even under a relatively high pressure.

[0093] Example 4: The puncture device of the present invention

[0094] refer to Figure 1-6 The puncture device 900 of the present invention comprises the pressure-resistant sealing ring 1 described in Example 1.

[0095] refer to Figure 2-5 The puncture device 900 of the present invention comprises the pressure-resistant sealing ring 1 described in Example 2.

[0096] The puncture device 900 is composed of a sheath tube 100 and a puncture rod 200. On the basis of Example 3 and Example 4, the puncture rod 200 is added, and a complete puncture device is obtained. Regardless of the structure of the puncture rod 200, the core of the puncture device 900 of the present invention is that the sleeve assembly 102 of the sheath tube 100 contains the pressure-resistant sealing ring 1 of the present invention. Since the reset mechanism 20 is provided in the pressure-resistant sealing ring 1 of the present invention, the mutual support of the positioning edge 20-1 makes it difficult for the incision 11 to be misplaced even under a higher intra-abdominal static pressure state, so the puncture device 900 of the present invention has excellent good and stable sealing performance under high intra-abdominal static pressure.

[0097] It should be noted that the structures disclosed and described herein can be replaced by other structures with the same effect, and the embodiments introduced in the present invention are not the only structures for implementing the present invention. Although the preferred embodiments of the present invention have been introduced and described herein, it is clear to those skilled in the art that these embodiments are only examples, and those skilled in the art can make countless changes, improvements and substitutions without departing from the present invention. Therefore, the protection scope of the present invention should be limited according to the spirit and scope of the claims attached to the present invention.

Claims

1. A pressure-resistant sealing ring for a trocar, characterized in that: The pressure-resistant sealing ring (1) comprises a cutout (11), a supporting surface (12), an end sealing surface (13) and a reset mechanism (20); A. The incision (11) through which surgical instruments can pass is arranged at the central part of the support surface (12); B. The reset mechanism (20) is arranged on the outer side of the support surface (12); each reset mechanism (20) comprises at least one pair of mutually cooperating positioning edges (20-1); C. The central portion of the support surface (12) is provided with the cutout (11), and the edge of the support surface (12) is connected to the end sealing surface (13); D. The mutually cooperating positioning edges (20-1) have mutually cooperating mating surfaces (20-11). When the instrument is removed, the incision (11) is closed, the positioning edges (20-1) return to their initial positions, and the mating surfaces (20-11) are close to each other. Under the action of intra-abdominal static pressure, the mating surfaces (20-11) fit and support each other to form surface contact. Under the reinforced support of the positioning edges (20-1), the incision (11) is not easy to be misplaced, thereby ensuring the sealing performance of the pressure-resistant sealing ring (1) under high static pressure conditions.

2. The pressure-resistant sealing ring according to claim 1, characterized in that: The height of the matching surface (20-11) of the positioning edge (20-1) is not less than 0.3 mm.

3. The pressure-resistant sealing ring according to claim 1, characterized in that: The positioning edge (20-1) and the supporting surface (12) are manufactured as a whole.

4. The pressure-resistant sealing ring according to claim 1, characterized in that: The pressure-resistant sealing ring (1) contains at least one cutout (11).

5. The pressure-resistant sealing ring according to claim 4, characterized in that: The pressure-resistant sealing ring (1) comprises two cutouts (11), and the two cutouts (11) are arranged in a cross shape.

6. The pressure-resistant sealing ring according to claim 5, characterized in that: The support surface (12) of the pressure-resistant sealing ring (1) forms four pairs of support inclined surfaces (12-1) along the two cross-shaped cutouts (11); each pair of the support inclined surfaces (12-1) are connected to each other, and a connecting ridge (12-11) is formed at the connection point; the support inclined surfaces (12-1) are recessed toward the inner side of the sealing ring (1) along the connecting ridge (12-11); the connecting ridge (12-11) forms an instrument contact ridge (12-3) on the inner side. The contact ridge (12-3) protrudes inwardly to reduce the contact area between the device and the sealing ring (1); the positioning ridges (20-1) of the reset mechanism (20) are symmetrically distributed on the outer side of the supporting inclined surface (12-1) along both sides of the connecting ridge line (12-11); the position of the positioning groove (20-2) formed between the positioning ridges (20-1) coincides with the connecting ridge line (12-11) and is arranged on the outer side of the supporting inclined surface (12-1).

7. The pressure-resistant sealing ring according to claim 4, characterized in that: The pressure-resistant sealing ring (1) comprises three cutouts (11), and the three cutouts (11) cross in a Y shape at the apex.

8. The pressure-resistant sealing ring according to claim 7, characterized in that: The support surface (12) of the pressure-resistant sealing ring (1) forms three pairs of support inclined surfaces (12-1) along the three cutouts (11) that cross in a Y shape; each pair of the support inclined surfaces (12-1) are connected to each other, and a connecting ridge (12-11) is formed at the connection; the support inclined surfaces (12-1) are recessed toward the inner side of the sealing ring (1) along the connecting ridge (12-11); the connecting ridge (12-11) forms an instrument contact ridge (12-3) on the inner side. The contact ridge (12-3) protrudes inwardly to reduce the contact area between the device and the sealing ring (1); the positioning ridges (20-1) of the reset mechanism (20) are symmetrically distributed on the outer side of the supporting inclined surface (12-1) along both sides of the connecting ridge line (12-11); the position of the positioning groove (20-2) formed between the positioning ridges (20-1) coincides with the connecting ridge line (12-11) and is arranged on the outer side of the supporting inclined surface (12-1).

9. The pressure-resistant sealing ring according to claim 1, characterized in that: The pressure-resistant sealing ring (1) also comprises a sealing convex edge (14); the sealing convex edge (14) is arranged on the inner side of the end sealing surface (13) and protrudes upward.

10. The pressure-resistant sealing ring according to claim 9, characterized in that: The sealing convex edge (14) is an annular structure, and a guide angle (14-1) is provided on the raised edge of the sealing convex edge (14).

11. The pressure-resistant sealing ring according to claim 9, characterized in that: The pressure-resistant sealing ring (1) also includes a flange (15), a flange reinforcement rib (16), and a mounting groove (17); the flange (15) is arranged on the outer side of the end sealing surface (13) and protrudes downward; the flange reinforcement rib (16) is arranged below the flange (15) and connected to the flange (15); a mounting groove (17) is formed between the sealing convex edge (14), the end sealing surface (13), the flange (15) and the flange reinforcement rib (16); the central part of the supporting surface (12) is connected to the cutout (11), and the edge of the supporting surface (12) is sequentially connected to the sealing convex edge (14), the end sealing surface (13), the flange (15), and the flange reinforcement rib (16).

12. The pressure-resistant sealing ring according to claim 11, characterized in that: The flange reinforcement rib (16) is provided with a mounting notch (16-2).

13. The pressure-resistant sealing ring according to claim 11, characterized in that: The end sealing surface (13), the flange (15) and the flange reinforcement rib (16) are all annular structures.

14. The pressure-resistant sealing ring according to claim 1, characterized in that: The pressure-resistant sealing ring (1) is integrally made of medical elastic material.

15. A sheath tube (100) of a puncture device, characterized in that: The sheath tube (100) of the trocar contains the pressure-resistant sealing ring (1) for the trocar according to claim 1.

16. A trocar (900), characterized in that: The puncture device (900) comprises the sheath tube (100) of the puncture device according to claim 15.

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