Trocar seal ring protection sheet, end seal assembly and trocar

Abstract

The trocar sealing ring protective sheet of the present invention includes a positioning skirt, a support sheet, and a curved surface protective sheet. The upper end of the support sheet is connected to the inside of the positioning skirt, and the lower end is connected to the upper end of the curved surface protective sheet. The curved surface protective sheet is provided with weakened regions, which are weakened grooves on the side of the curved surface protective sheet or weakened patterns on the back of the curved surface protective sheet. An easily deformed region is formed between the weakened grooves or weakened patterns and the bottom edge of the curved surface protective sheet. When surgical instruments are removed, deformation occurs preferentially in the easily deformed region, thereby effectively preventing the lower end of the curved surface protective sheet from getting caught on the protruding or recessed grooves of the surgical instruments and reducing resistance during removal of the surgical instruments. A trocar including the trocar sealing ring protective sheet of the present invention can ensure good sealing performance to prevent the funnel-shaped sealing ring from being broken by surgical instruments during surgery, while also reducing resistance during movement, especially when removing surgical instruments, effectively ensuring smooth movement of the surgical instruments.

Description

[Technical field]

[0001] The present invention relates to surgical instruments, and more particularly to a sealing ring protector for a trocar, an end seal assembly, and a trocar used in laparoscopic surgery. [Background technology]

[0002] Laparoscopic surgery is becoming more and more widely applied. To avoid iatrogenic infection, the use of disposable trocars in laparoscopic surgery is also becoming more common. Ensuring the dynamic sealing of the trocar during frequent insertion and removal of surgical instruments is the key to smooth operation. Since various shapes of surgical instruments are used during surgery, trocars are required to be able to accommodate various shapes of surgical instruments and to facilitate insertion and removal of the instruments. In addition, to ensure smooth instrument movement, low resistance must be maintained when inserting and removing the instruments.

[0003] In the prior art, the general-purpose radial seal ring is a funnel-type seal ring. In order to prevent the seal ring from being broken by surgical instruments during a long operation and leaking, a seal ring protection sheet is generally attached to the top of the funnel-type seal ring, so that when the instrument enters or leaves the trocar, it moves inward along the surface of the protection sheet and passes through the radial seal ring. The design of the seal ring protection sheet allows the thickness of the seal ring to be reduced as much as possible while maintaining the sealing property, thereby reducing the resistance that the seal ring exerts on the entry and exit of the instrument. However, the seal ring protection sheet itself may increase the movement resistance of the instrument when it enters or exits. In particular, in the case of an irregularly shaped surgical instrument such as a seven-shaped forceps or a surgical instrument with a convex step or a concave groove, the protection sheet of the prior art gets caught on the convex step or the concave groove, which brings about a large resistance when the surgical instrument is inserted or removed.

[0004] Therefore, there is a need to improve the conventional sealing ring protective sheet so as to provide sufficient protection for the sealing ring while further reducing the movement resistance that the protective sheet exerts on the ingress and egress of an instrument. Summary of the Invention

[0005] The special design of the weakened area of ​​the trocar sealing ring protective sheet of the present invention allows the laminated protective sheet to protect the sealing ring when the surgical instrument is inserted into the trocar, and the weakened area design allows the lower end of the protective sheet to be pulled and turned over easily during the process of removing the surgical instrument, thereby effectively preventing the protective sheet from getting caught on the protruding or recessed groove of the surgical instrument and effectively reducing the movement resistance when the surgical instrument is removed.

[0006] The present invention provides a protective sheet 2 for a sealing ring for a trocar, which includes a positioning skirt 201, a support sheet 202 and a curved surface protective sheet 203, characterized in that: A. the positioning skirt 201 is a sheet-like structure having a positioning hole 201-1, and the inner side of the positioning skirt 201 is connected to the upper end of the support sheet 202; B. the support sheet 202 is a sheet-like structure having an upper end connected to the inner side of the positioning skirt 201 and a lower end connected to the upper end of the curved surface protective sheet 203; and C. the curved surface protective sheet 203 is provided with a weakened area 203-1.

[0007] The weakened region 203-1 can form an easily deformable region 20-3 at the lower end of the curved protective sheet 203, and when a surgical instrument is removed, deformation movement occurs preferentially in the easily deformable region 20-3, thereby effectively preventing the lower end of the curved protective sheet 203 from getting caught on the convex steps or concave grooves of the surgical instrument, and reducing the resistance when the surgical instrument is removed.

[0008] The weakened area 203-1 is a weakened groove 203-11 provided on the right side 203-2 of the curved surface protection sheet 203. Of course, the weakened groove 203-11 may be provided on the left side of the curved surface protection sheet 203. In practical application, the easily deformable area 20-3 may be arranged on the upper side according to the direction of the weakened groove 203-11, and the trocar sealing ring protection sheets 2 may be alternately stacked.

[0009] The weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protection sheet 203, and includes an upper edge line 203-11-1 and a lower edge line 203-11-2 which intersect with each other, and the included angle α between the lower edge line 203-11-2 and the bottom edge of the curved protection sheet 203 is ≦90°.

[0010] The region between the lower edge line 203-11-2 and the bottom side of the curved surface protection sheet 203 is formed as the easily deformable region 20-3.

[0011] The weakening groove 203-11 is generally located in the middle of the right side 203-2 of the curved surface protection sheet 203, and is preferably located in the range of 1 / 3 to 2 / 3 of the height of the right side 203-2. At this height, the protective effect of the curved surface protection sheet 203 on the seal ring can be guaranteed, and the deformation force of the easily deformable region 20-3 can be sufficiently reduced. By making the included angle α≦90°, a substantially triangular region is formed on the right side of the easily deformable region 20-3, and when an external force is applied, the tip corner region of the triangular region is very easily bounced up and deformed, so that the surgical instrument can quickly pass over the trocar seal ring protection sheet 2 and exit from the trocar 29.

[0012] The weakened area 203 - 1 is a weakened pattern 203 - 12 provided on the rear surface of the curved surface protection sheet 203 .

[0013] The area between the weakened pattern 203-12 and the bottom side of the curved protective sheet 203 is formed as the easily deformable area 20-3. When a surgical instrument is removed, the weakened pattern 203-12 is first deformed by the force, and then the easily deformable area 20-3 is deformed in conjunction with the weakened pattern 203-12, so that the surgical instrument can be removed from the trocar 29 with low resistance.

[0014] The weakening pattern 203-12 is a strip-shaped groove structure, but it may also be a wave-shaped groove, a plurality of parallel strip-shaped groove structures, etc. Although the applicant does not provide examples here, none of them depart from the scope of protection of the present application.

[0015] The included angle β between the weakened pattern 203-12 and the bottom side of the curved surface protection sheet 203 is within a range of 10° to 170°, and preferably within a range of 30° to 60°.

[0016] The depth h of the weakened pattern 203-12 is smaller than the thickness d of the curved protective sheet 203. By making the depth h of the weakened pattern 203-12 smaller than the thickness d of the protective sheet, it is ensured that when a surgical instrument is inserted into the trocar 100, the contact surface with the protective sheet 30 is a smooth surface, and the protective sealing ring will not be broken by the surgical instrument, and will not cause extra resistance to the insertion of the surgical instrument.

[0017] The angle between the curved surface protection sheet 203 and the support sheet 202 is ≧90°, and generally within the range of 90° to 170°.

[0018] A funnel-shaped protection sheet assembly 21 can be constructed by distributing four or more of the trocar sealing ring protection sheets 2 in an alternating layered manner.

[0019] Furthermore, the funnel-shaped protective sheet assembly 21 can be formed by distributing the eight trocar sealing ring protective sheets 2 so as to be alternately stacked at 45°. By distributing the eight trocar sealing ring protective sheets 2 so as to be alternately stacked at 45°, a funnel-shaped structure having a good bonding action, which is symmetrically distributed, can be well formed on the top of the funnel-shaped seal ring 5. In this structure, when a surgical instrument passes through, the funnel-shaped protective sheet assembly 21 formed by alternately stacking the eight sealing ring protective sheets 2 reduces the contact area between the surgical instrument and the seal ring 5 as much as possible, thereby ensuring sealing and reducing the frictional resistance of the instrument movement as much as possible. The funnel-shaped protective sheet assembly 21 formed from the eight sealing ring protective sheets 2 is an optimized structure.

[0020] The positioning skirt 201 is perpendicular to the support sheet 202. Due to the design of the perpendicular structure, the support sheet 202 can be attached to the inner wall of the upper push plate 1 and hung, so that the effect of mounting and positioning is improved.

[0021] The end seal assembly 20 includes the trocar seal ring protective sheet 2.

[0022] The end seal assembly 20 includes an upper press plate 1, a protective sheet 2, a corrugated seal ring 3, a positioning seat 4, a funnel-shaped seal ring 5, and a lower press plate 6, and the eight protective sheets 2 are attached to the positioning pillars 1-1 of the upper press plate 1 by the positioning holes 201-1 so that the right side 203-2 of the curved protective sheet 203 always presses the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, so that the right side 203-2 of the curved protective sheet 203 is always located in the upper layer and the left side 203-3 of the curved protective sheet 203 is always located in the lower layer. Thus, the eight protective sheets 2 are distributed alternately in layers to form an annular funnel-shaped protective sheet assembly 21, and the positioning holes 3-1 of the corrugated seal ring 3 are positioned in the positioning pillars 1-1 of the upper press plate 1 so that the two adjacent protective sheets 2 are always in a state where the right side 203-2 of the curved protective sheet 203 is always located in the upper layer and the left side 203-3 of the curved protective sheet 203 is always located in the lower layer. 1-1, the annular funnel-shaped protective sheet assembly 21 is attached between the corrugated seal ring 3 and the upper push plate 1, an upper positioning hole 4-1 and a lower positioning hole 4-2 are provided in the positioning seat 4, the positioning pillar 1-1 of the upper push plate 1 is fitted into the upper positioning hole 4-1 of the positioning seat 4, the protective sheet 2 and the corrugated seal ring 3 are attached in order between the upper push plate 1 and the positioning seat 4, a positioning hole 5-1 is provided in the funnel-shaped seal ring 5, a positioning pillar 6-1 is provided on the lower push plate 6, the positioning pillar 6-1 of the lower push plate 6 passes through the positioning hole 5-1 of the funnel-shaped seal ring 5 and is fitted into the lower positioning hole 4-2 of the positioning seat 4, and the funnel-shaped seal ring 5 is attached between the lower push plate 6 and the positioning seat 4.

[0023] Since the end seal assembly 20 employs the annular funnel-shaped protective sheet assembly 21, it is ensured that the funnel-shaped seal ring 5 will not be broken by surgical instruments during surgery, and the resistance during movement is also reduced, effectively ensuring the smooth movement of surgical instruments.

[0024] The trocar 29 is characterized by including the trocar seal ring protective sheet 2.

[0025] The trocar 29 includes the end seal assembly 20 .

[0026] The trocar 29 includes a sheath tube 100 and a puncture rod 200. The sheath tube 100 includes an end cover 101 and a sleeve assembly 102. The end seal assembly 20 is fitted between an upper case 101-1 and a lower case 101-2 of the end cover 101.

[0027] The trocar sealing ring protective sheet of the present invention includes a positioning skirt 201, a support sheet 202, and a curved surface protective sheet 203. The upper end of the support sheet 202 is connected to the inside of the positioning skirt 201, and the lower end is connected to the upper end of the curved surface protective sheet 203. The curved surface protective sheet 203 is provided with a weakened area 203-1, which is a weakened groove 203-11 provided on the side of the curved surface protective sheet 203 or a weakened pattern 203-12 provided on the back side of the curved surface protective sheet 203. The easily deformed area 20-3 is formed between the weakened groove 203-11 or the weakened pattern 203-12 and the bottom side of the curved surface protective sheet 203. When a surgical instrument is removed, a deformation movement occurs preferentially in the easily deformed area 20-3, thereby effectively avoiding the lower end of the curved surface protective sheet 203 from being caught in the convex step or concave groove of the surgical instrument, and reducing the resistance when the surgical instrument is removed. A trocar including the trocar sealing ring protective sheet of the present invention can ensure good sealing properties so that the funnel-shaped sealing ring 5 is not broken by surgical instruments during surgery, and can also reduce resistance during movement, particularly when removing surgical instruments, effectively ensuring smooth movement of the surgical instruments. [Brief description of the drawings]

[0028] [Figure 1] FIG. 2 is a schematic perspective view of the structure of a sealing ring protection sheet for a trocar according to the present invention, which includes weakened grooves. [Diagram 2] FIG. 2 is a front view of the trocar sealing ring protective sheet of the present invention. [Figure 2-1] FIG. 3 is a top view of FIG. 2. [Figure 2-2] FIG. 3 is a bottom view of FIG. 2. [Figure 2-3] FIG. 3 is a side view of FIG. 2. [Figure 2-4] FIG. 3 is a side view of FIG. 2. [Diagram 3] This is a protective sheet assembly consisting of eight of the trocar sealing ring protective sheets of the present invention. [Figure 3-1] FIG. 4 is an exploded view of FIG. [Figure 3-2] FIG. 4 is a bottom view of FIG. [Figure 3-3] This is an exploded view of Figure 3-2. [Diagram 3-4] FIG. 4 is a front view of FIG. [Figure 3-5] 4 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 2 is a top view of the end seal assembly of the present invention. [Figure 4-1] FIG. 5 is a front view of FIG. [Figure 4-2] FIG. 4-1 is a bottom view. [Figure 4-3] FIG. 4-1 is a schematic perspective view of the top structure of FIG. [Figure 4-4] FIG. 4-1 is a schematic perspective view of the bottom surface of FIG. [Figure 4-5] 5 is a cross-sectional view of FIG. 4 taken along line B-B. [Figure 4-6] FIG. 4-1 is an exploded top view of FIG. [Diagram 4-7] FIG. 4-1 is an exploded bottom view of the exploded view. [Diagram 5] FIG. 5 is a schematic diagram of the structure of the trocar of the present invention including FIG. 4. [Figure 6] FIG. 2 is a schematic perspective view of the structure of a sealing ring protection sheet for a trocar according to the present invention, which includes weakened grooves. [Figure 6-1] FIG. 7 is a rear perspective view of FIG. 6. [Figure 7] FIG. 2 is a front view of the trocar sealing ring protective sheet of the present invention. [Figure 7-1] FIG. 8 is a top view of FIG. [Figure 7-2] FIG. 8 is a bottom view of FIG. [Figure 7-3] FIG. 8 is a side view of FIG. [Figure 7-4] FIG. 8 is a side view of FIG. [Figure 8] This is a protective sheet assembly consisting of eight of the trocar sealing ring protective sheets of the present invention. [Figure 8-1] FIG. 9 is an exploded view of FIG. 8. [Figure 8-2] FIG. 9 is a bottom view of FIG. [Figure 8-3] This is an exploded view of Figure 8-2. [Figure 8-4] FIG. 9 is a front view of FIG. 8. [Figure 8-5] 9 is a cross-sectional view taken along CC in FIG. 8 . [Figure 9] FIG. 2 is a top view of the end seal assembly of the present invention. [Figure 9-1] FIG. 10 is a front view of FIG. [Figure 9-2] FIG. 9-1 is a bottom view. [Figure 9-3] FIG. 9-1 is a schematic top perspective view of the structure. [Figure 9-4] FIG. 9-1 is a schematic diagram of a perspective structure as viewed from below. [Figure 9-5] FIG. 10 is a cross-sectional view taken along the line DD in FIG. [Figure 9-6] FIG. 9-1 is an exploded top view of FIG. [Figure 9-7] FIG. 9-1 is an exploded bottom view of FIG. [Figure 10] FIG. 10 is a schematic diagram of the structure of the trocar of the present invention, including FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] <Example 1: Protective sheet for a sealing ring for a trocar according to the present invention including weakened grooves> 1 to 3-5, in this embodiment, the trocar sealing ring protection sheet 2 includes a positioning skirt 201, a support sheet 202 and a curved surface protection sheet 203. As shown in FIG.

[0030] The positioning skirt 201 is a sheet-like structure with a positioning hole 201-1. The inner side of the positioning skirt 201 is connected to the upper end of the support sheet 202. The positioning skirt 201 is perpendicular to the support sheet 202.

[0031] The support sheet 202 has a sheet-like structure, the upper end of which is connected to the inside of the positioning skirt 201 and the lower end of which is connected to the upper end of the curved surface protection sheet 203 .

[0032] The curved surface protection sheet 203 is provided with a weakened area 203-1.

[0033] The weakened region 203-1 can form an easily deformable region 20-3 at the lower end of the curved protective sheet 203, and when a surgical instrument is removed, deformation movement occurs preferentially in the easily deformable region 20-3, thereby effectively preventing the lower end of the curved protective sheet 203 from getting caught on the convex steps or concave grooves of the surgical instrument, and reducing the resistance when the surgical instrument is removed.

[0034] 1 to 2-4, in this embodiment, the weakened area 203-1 is a weakened groove 203-11 provided on the right side 203-2 of the curved surface protection sheet 203. Of course, the weakened groove 203-11 may be provided on the left side of the curved surface protection sheet 203, and in practical application, the easily deformable area 20-3 may be disposed on the upper side according to the direction of the weakened groove 203-11, and the trocar sealing ring protection sheets 2 may be alternately stacked.

[0035] The weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protection sheet 203, and includes an upper edge line 203-11-1 and a lower edge line 203-11-2 which intersect with each other, and the included angle α between the lower edge line 203-11-2 and the bottom edge of the curved protection sheet 203 is ≦90°.

[0036] The region between the lower edge line 203-11-2 and the bottom side of the curved surface protection sheet 203 is formed as the easily deformable region 20-3.

[0037] 5, the weakening groove 203-11 is generally located in the middle of the right side 203-2 of the curved surface protection sheet 203, preferably in the range of 1 / 3 to 2 / 3 of the height of the right side 203-2, at which height the curved surface protection sheet 203 can ensure the protection effect of the curved surface protection sheet 203 on the sealing ring and can sufficiently reduce the deformation force of the easily deformable region 20-3. By making the included angle α≦90°, a substantially triangular region is formed on the right side of the easily deformable region 20-3, and when an external force is applied, the tip corner region of the triangular region is very easily bounced up and deformed, so that the surgical instrument can quickly pass over the trocar sealing ring protection sheet 2 and exit from the trocar 29.

[0038] The included angle α between the curved surface protection sheet 203 and the support sheet 202 is greater than 90°, and in this embodiment, the included angle α is in the range of 120° to 170°.

[0039] The positioning skirt 201 is perpendicular to the support sheet 202. Due to the design of the perpendicular structure, the support sheet 202 can be attached to the inner wall of the upper push plate 1 and hung, so that the effect of mounting and positioning is improved.

[0040] Please refer to FIG. 3 to FIG. 3-5. In this embodiment, the eight trocar seal ring protection sheets 2 are distributed so as to be alternately stacked at 45° to form a funnel-shaped protection sheet assembly 21. The eight trocar seal ring protection sheets 2 are distributed so as to be alternately stacked at 45° to form a funnel-shaped structure having a good bonding action symmetrically distributed on the upper part of the funnel-shaped seal ring 5. In this structure, when a surgical instrument passes through, the funnel-shaped protection sheet assembly 21 formed by alternately stacking the eight seal ring protection sheets 2 reduces the contact area between the surgical instrument and the seal ring 5 as much as possible, so that the sealing property is guaranteed and the frictional resistance of the instrument movement is also reduced as much as possible. The funnel-shaped protection sheet assembly 21 formed from the eight seal ring protection sheets 2 is an optimized structure.

[0041] The easily deformable region 20-3 is formed between the weakened groove 203-11 and the bottom side of the curved surface protection sheet 203. When a surgical instrument is removed, a deformation movement occurs preferentially in the easily deformable region 20-3, which effectively prevents the lower end of the curved surface protection sheet 203 from getting caught on the protruding step or recessed groove of the surgical instrument, thereby reducing the resistance when the surgical instrument is removed. <Example 2: Trocar sealing ring protective sheet of the present invention including weakened patterns>

[0042] 6 to 8-5, the present embodiment differs from the first embodiment in that the weakened area 203-1 in the present embodiment is a weakened pattern 203-12 provided on the rear surface of the curved surface protection sheet 203. As shown in FIG.

[0043] 6-1, the area between the weakened pattern 203-12 and the bottom side of the curved protective sheet 203 is formed as the easily deformable area 20-3. When a surgical instrument is removed, the weakened pattern 203-12 is first deformed by a force, and then the easily deformable area 20-3 is deformed in conjunction with the weakened pattern 203-12, so that the surgical instrument can be removed from the trocar 29 with low resistance.

[0044] In this embodiment, the weakening pattern 203-12 is a strip-shaped groove structure, but it may also be a wave-shaped groove structure, a plurality of parallel strip-shaped groove structures, etc. Here, the applicant does not provide examples, but all of them do not deviate from the scope of protection of the present application.

[0045] Referring to FIG. 6-1, the included angle β between the weakened pattern 203-12 and the bottom side of the curved surface protection sheet 203 is in the range of 10° to 170°. The included angle β is preferably in the range of 30° to 60°.

[0046] The depth h of the weakened pattern 203-12 is smaller than the thickness d of the curved protective sheet 203. By making the depth h of the weakened pattern 30-1 smaller than the thickness d of the protective sheet, it is ensured that when a surgical instrument is inserted into the trocar 100, the contact surface with the protective sheet 30 is a smooth surface, and the protective sealing ring will not be broken by the surgical instrument, and will not cause extra resistance to the insertion of the surgical instrument.

[0047] 8 to 8-5, in this embodiment, the eight trocar seal ring protection sheets 2 are alternately stacked at 45° to form a funnel-shaped protection sheet assembly 21. The eight trocar seal ring protection sheets 2 are alternately stacked at 45° to form a funnel-shaped structure with good symmetrical bonding on the top of the funnel-shaped seal ring 5. In this structure, when a surgical instrument passes through, the funnel-shaped protection sheet assembly 21 formed by alternately stacking the eight seal ring protection sheets 2 reduces the contact area between the surgical instrument and the seal ring 5 as much as possible, ensuring sealing and reducing the frictional resistance of the instrument movement as much as possible. The funnel-shaped protection sheet assembly 21 formed from the eight seal ring protection sheets 2 is an optimized structure.

[0048] 10, the weakened pattern 203-12 is provided on the back surface of the curved surface protection sheet 203. In this way, when a surgical instrument is inserted, the front surface of the curved surface protection sheet 203 is laminated to form a complete protective surface, so that the sealing ring 5 can be better protected from being broken by the surgical instrument, and the safety during use is very high.

[0049] In practical application, the weakened grooves 203-11 and the weakened patterns 203-12 may be provided together on the trocar sealing ring protective sheet 2, so as to further reduce the movement resistance when the surgical instrument is removed. Here, the applicant does not give further concrete examples, but any of them do not depart from the scope of protection of the present application. <Example 3 End seal assembly of the present invention>

[0050] 4 to 4-7, the end seal assembly of the present invention includes the trocar seal ring protective sheet 2 described in Example 1, and an annular funnel-shaped protective sheet assembly 21 consisting of the trocar seal ring protective sheet 2.

[0051] 4-6 and 4-7, the end seal assembly 20 includes an upper pressure plate 1, a protective sheet 2, a corrugated seal ring 3, a positioning seat 4, a funnel-shaped seal ring 5 and a lower pressure plate 6.

[0052] 3 to 3-5, the eight protective sheets 2 are attached to the positioning columns 1-1 of the upper press plate 1 by the positioning holes 201-1 so that the right side 203-2 of the curved protective sheet 203 always presses the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, so that the right side 203-2 of the curved protective sheet 203 is always located in the upper layer and the left side 203-3 of the curved protective sheet 203 is always located in the lower layer.By distributing the protective sheets in this manner so as to be stacked alternately, a ring-shaped funnel-shaped protective sheet assembly 21 is formed.

[0053] Please refer to Figures 4 to 4-5. The positioning hole 3-1 of the corrugated seal ring 3 is fitted into the positioning pillar 1-1 of the upper press plate 1, and the annular funnel-shaped protective sheet assembly 21 is attached between the corrugated seal ring 3 and the upper press plate 1. The positioning seat 4 is provided with an upper positioning hole 4-1 and a lower positioning hole 4-2, the positioning pillar 1-1 of the upper press plate 1 is fitted into the upper positioning hole 4-1 of the positioning seat 4, and the protective sheet 2 and the corrugated seal ring 3 are attached in order between the upper press plate 1 and the positioning seat 4. The funnel-shaped seal ring 5 is provided with a positioning hole 5-1, the lower press plate 6 is provided with a positioning pillar 6-1, the positioning pillar 6-1 of the lower press plate 6 passes through the positioning hole 5-1 of the funnel-shaped seal ring 5 and is fitted into the lower positioning hole 4-2 of the positioning seat 4, and the funnel-shaped seal ring 5 is attached between the lower press plate 6 and the positioning seat 4.

[0054] 9 to 9-7, the end seal assembly of the present invention includes the trocar seal ring protective sheet 2 described in Example 2, and an annular funnel-shaped protective sheet assembly 21 consisting of the trocar seal ring protective sheet 2.

[0055] 9-6 and 9-7, the end seal assembly 20 includes an upper pressure plate 1, a protective sheet 2, a corrugated seal ring 3, a positioning seat 4, a funnel-shaped seal ring 5 and a lower pressure plate 6.

[0056] 3 to 3-5, the eight protective sheets 2 are attached to the positioning columns 1-1 of the upper press plate 1 by the positioning holes 201-1 so that the right side 203-2 of the curved protective sheet 203 always presses the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, so that the right side 203-2 of the curved protective sheet 203 is always located in the upper layer and the left side 203-3 of the curved protective sheet 203 is always located in the lower layer.By distributing the protective sheets in this manner so as to be stacked alternately, a ring-shaped funnel-shaped protective sheet assembly 21 is formed.

[0057] Please refer to Figures 4 to 4-5 and Figures 9 to 9-5. The positioning hole 3-1 of the corrugated seal ring 3 is fitted into the positioning pillar 1-1 of the upper press plate 1, and the annular funnel-shaped protective sheet assembly 21 is attached between the corrugated seal ring 3 and the upper press plate 1. The positioning seat 4 is provided with an upper positioning hole 4-1 and a lower positioning hole 4-2, the positioning pillar 1-1 of the upper press plate 1 is fitted into the upper positioning hole 4-1 of the positioning seat 4, and the protective sheet 2 and the corrugated seal ring 3 are attached in order between the upper press plate 1 and the positioning seat 4. The funnel-shaped seal ring 5 is provided with a positioning hole 5-1, the lower press plate 6 is provided with a positioning pillar 6-1, the positioning pillar 6-1 of the lower press plate 6 is fitted into the lower positioning hole 4-2 of the positioning seat 4 through the positioning hole 5-1 of the funnel-shaped seal ring 5, and the funnel-shaped seal ring 5 is attached between the lower press plate 6 and the positioning seat 4.

[0058] Because the end seal assembly 20 employs the annular funnel-shaped protective sheet assembly 21, it is ensured that the funnel-shaped seal ring 5 will not be broken by surgical instruments during surgery, and the resistance during movement is also reduced, effectively ensuring the smooth movement of surgical instruments, which is particularly beneficial for the insertion and removal of various irregularly shaped instruments. <Example 4 Trocar of the present invention>

[0059] 5 and 10, in this embodiment, the trocar 29 includes the end seal assembly 20 described in the third embodiment.

[0060] The trocar 29 includes a sheath tube 100 and a puncture rod 200. The sheath tube 100 includes an end cover 101 and a sleeve assembly 102. The end seal assembly 20 is fitted between an upper case 101-1 and a lower case 101-2 of the end cover 101.

[0061] Regardless of the structure of the puncture rod 200 and sleeve assembly 102 used, the core of the trocar 29 in this embodiment is that an annular funnel-shaped protective sheet assembly 21 is used in the end seal assembly 20 of the trocar 29, which is constructed by alternately stacking the trocar seal ring protective sheets 2 described in Examples 1 and 2.

[0062] The structural design of the weakened area 203-1 in the curved protective sheet 203 of the trocar sealing ring protective sheet 2 can ensure good sealing performance to prevent the funnel-shaped sealing ring 5 from being broken by surgical instruments during surgery, and can also reduce resistance during movement, especially when removing surgical instruments, thereby effectively ensuring smooth movement of the surgical instruments.

[0063] It should be noted that structures having the same other effects can be used instead of the structures disclosed and described in this specification, and the embodiments given in this specification are not the only structures for realizing the present invention. Although preferred embodiments of the present invention have been given and described in this specification, it is obvious to those skilled in the art that these embodiments are merely for illustrative purposes. Those skilled in the art may make various changes, improvements and substitutions without departing from the present invention. Therefore, the scope of protection of the present invention is limited by the spirit and scope of the appended claims of the present invention. [Explanation of symbols]

[0064] In the figure 1: upper push plate, 2: trocar seal ring protective sheet, 3: corrugated seal ring, 4: positioning seat, 5: funnel-shaped seal ring, 6: lower push plate, 9: surgical instrument channel, 20: end seal assembly, 21: protective sheet assembly, 29: trocar. Trocar seal ring protection sheet 201: positioning skirt, 202: support sheet, 203: curved surface protection sheet, 20-3: easily deformable region. 201-1: Positioning hole. 203-1: Weakened area, 203-2: Right side of curved surface protection sheet, 203-3: Left side of curved surface protection sheet. 203-11: Weakened groove, 203-12: Weakened pattern. 203-11-1: Top line, 203-11-2: Bottom line. α: the included angle between the bottom edge line and the bottom edge of the curved protection sheet, β: the included angle between the weakening pattern and the bottom edge of the curved protection sheet. In the end seal assembly 1-1: positioning post of upper pressure plate, 3-1: positioning hole of corrugated seal ring, 4-1: upper positioning hole in positioning seat, 4-2: lower positioning hole in positioning seat, 5-1: positioning hole in funnel-shaped seal ring, 6-1: positioning post of lower pressure plate. In trocar 100: sheath tube, 200: puncture rod, 101: end cover, 102: sleeve assembly, 101-1: upper case, 101-2: lower case.

Claims

1. A trocar sealing ring protective sheet (2), Positioning skirt (201), support sheet (202), and curved surface protection sheet (203) Including, A. The positioning skirt (201) is a sheet having a positioning hole (201-1). The inner side of the positioning skirt (201) is the support sheet (202). It is connected to the top B. The support sheet (202) is a sheet-like structure, and the support sheet (202) The upper end is connected to the inside of the positioning skirt (201), and the support sheet (20 2) is connected to the upper end of the curved surface protection sheet (203); C. The curved protective sheet (203) is an asymmetric sheet structure with respect to a plane including the center line of the positioning hole (201-1) and perpendicular to the positioning skirt (201) and the support sheet (202), the right side (203-2) and the left side (203-3) being located on the right side and the left side of the plane, respectively, and having different sizes, and the curved protective sheet (203) is curved in a direction connecting the upper surface and the lower surface of the sheet structure; The right side (203-2) further includes: An upper side (203-11) arranged toward the support sheet (202); Adjacent to the upper side (203-11) and spaced apart from the support sheet (202), The lower side (203-12) and A base edge adjacent to the lower edge (203-12), The intersection of the upper side (203-11) and the lower side (203-12) defines a weakened region (203-1) by forming a groove recessed in a direction toward the plane, and the trocar sealing ring protective sheet During use of the trocar seal ring protective sheet (2), a surgical instrument may be removed from the trocar seal ring protective sheet (2). When the curved protective sheet (203) is removed, the curved protective sheet (203) below the weakened area (203-1) The region (20-3) is deformed, The region (20-3) is defined by the lower side (203-12) and the base side. Protective sheet for sealing rings for trocars.

2. The included angle α between the lower side (203-12) and the bottom side of the curved surface protection sheet (203) is less than or equal to 90°; The trocar sealing ring protective sheet according to claim 1 .

3. The curved surface protection sheet (203) has a front surface and a back surface, the surgical instrument is inserted through the front surface, and the weakened area (203-1) of the curved surface protection sheet (203) includes a straight line pattern (203-12) provided on the back surface of the curved surface protection sheet (203). The trocar sealing ring protective sheet according to claim 1 .

4. The linear pattern (203-12) is a strip-shaped groove structure; The trocar sealing ring protective sheet according to claim 3.

5. The included angle β between the linear pattern (203-12) and the base of the curved surface protection sheet (203) is within the range of 10° to 170°; The trocar sealing ring protective sheet according to claim 3.

6. The depth h of the linear pattern (203-12) is smaller than the thickness d of the curved surface protection sheet (203); The trocar sealing ring protective sheet according to claim 3.

7. The included angle between the curved surface protection sheet (203) and the support sheet (202) is 90° or more; The trocar sealing ring protective sheet according to claim 1 .

8. A funnel-shaped protective sheet assembly (21) including four or more of the trocar sealing ring protective sheets (2) according to claim 1, wherein the four or more trocar sealing ring protective sheets (2) are arranged in an alternating stack. Funnel-shaped protective sheet assembly.

9. It is formed by stacking eight of the trocar sealing ring protective sheets (2) alternately at 45° intervals. The funnel-shaped protective sheet assembly according to claim 8.

10. The positioning skirt (201) is perpendicular to the support sheet (202). The trocar sealing ring protective sheet according to claim 1 .

11. 8. An end seal assembly (20), comprising a trocar sealing ring protective sheet (2) according to claim 1.

12. The end seal assembly (20) includes an upper push plate (1), a trocar seal ring protection sheet (2), a corrugated seal ring (3), a positioning seat (4), a funnel-shaped seal ring (5), and a lower push plate (6). The eight trocar sealing ring protective sheets (2) are attached to the positioning pillars (1-1) of the upper push plate (1) by the positioning holes (201-1) so that the right side (203-2) of the curved surface protective sheet (203) of each of the two adjacent trocar sealing ring protective sheets (2) always presses the left side (203-3) of the curved surface protective sheet (203) of the adjacent trocar sealing ring protective sheet (2), and the right side (203-2) of the curved surface protective sheet (203) is always located in the upper layer, and the left side (203-3) of the curved surface protective sheet (203) is always located in the lower layer, thereby forming an annular funnel-shaped protective sheet assembly (21); The positioning hole (3-1) of the corrugated seal ring (3) is fitted into the positioning post (1-1) of the upper push plate (1), and the annular funnel-type protective sheet assembly (21) is attached between the corrugated seal ring (3) and the upper push plate (1), The positioning seat (4) is provided with an upper positioning hole (4-1) and a lower positioning hole (4-2), the positioning post (1-1) of the upper push plate (1) is fitted into the upper positioning hole (4-1) of the positioning seat (4), and the trocar seal ring protective sheet (2) and the corrugated seal ring (3) are attached in order between the upper push plate (1) and the positioning seat (4); A positioning hole (5-1) is provided in the funnel-shaped seal ring (5), a positioning pillar (6-1) is provided in the lower push plate (6), the positioning pillar (6-1) of the lower push plate (6) passes through the positioning hole (5-1) of the funnel-shaped seal ring (5) and is fitted into the lower positioning hole (4-2) of the positioning seat (4), and the funnel-shaped seal ring (5) is attached between the lower push plate (6) and the positioning seat (4). The end seal assembly of claim 11.

13. A trocar (29), comprising a trocar sealing ring protective sheet (2) according to claim 1.

14. The trocar (29) includes an end seal assembly (20) as recited in claim 11. The trocar of claim 13.

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