Sealing ring protection sheet for puncture device, end sealing assembly and puncture device

Abstract

The sealing ring protection sheet for the puncture device of the present invention comprises a positioning skirt, a support sheet and a curved surface protection sheet. The upper end of the support sheet is connected to the inner side of the positioning skirt, and the lower end thereof is connected to the upper end of the curved surface protection sheet. A weakened area is provided on the curved surface protection sheet, and the weakened area is a weakened groove arranged on the side of the curved surface protection sheet or a weakened pattern on the back side. An easily deformable area is formed between the weakened groove or the weakened pattern and the bottom edge of the curved surface protection sheet. When the surgical instrument is pulled out, the easily deformable area is deformed first, thereby effectively avoiding the lower end of the curved surface protection sheet from being embedded in the convex step or groove of the surgical instrument, and reducing the resistance when the surgical instrument is pulled out. The puncture device comprising the sealing ring protection sheet for the puncture device of the present invention can ensure that the funnel-shaped sealing ring is not punctured by the surgical instrument during the operation, ensure good sealing, and reduce the resistance during movement, especially reduce the movement resistance when the surgical instrument is pulled out, and well ensure the smoothness of the surgical instrument during movement.

Description

Technical Field

[0001] The invention relates to a surgical instrument, in particular to a sealing ring protection sheet, an end sealing component and a puncture device used in laparoscopic surgery. 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. In the frequent process of surgical instruments entering and exiting, ensuring the dynamic sealing of the trocar is the key to ensuring the smooth progress of the operation. Moreover, during the operation, surgical instruments of various shapes will be used. Therefore, the trocar also needs to be able to adapt to surgical instruments of various shapes to facilitate the entry and exit of the instruments. In addition, the entry and exit process of the instruments needs to maintain low resistance to ensure the smoothness of the instrument movement process.

[0003] In the prior art, the common radial sealing ring is a funnel-shaped sealing ring. In order to ensure that the sealing ring is not punctured by surgical instruments during a long operation, causing leakage, a sealing ring protection sheet is usually installed on the upper part of the funnel-shaped sealing ring, so that when the instrument enters and exits the puncture device, it moves inward along the surface of the protection sheet through the radial sealing ring. The design of the sealing ring protection sheet allows the thickness of the sealing ring to be reduced as much as possible while maintaining the sealing system, thereby reducing the resistance of the sealing ring to the entry and exit of the instrument, but conversely, the sealing ring protection sheet itself will increase the movement resistance to the entry and exit of the instrument. In particular, for special-shaped surgical instruments, such as 7-shaped forceps, or surgical instruments with convex steps or grooves, the protection sheet of the prior art will be embedded in the convex steps or grooves, forming a large resistance when the surgical instrument is inserted or removed.

[0004] Therefore, it is necessary to improve the existing sealing ring protection sheet so as to provide sufficient protection for the sealing ring while further reducing the movement resistance caused by the protection sheet to the entry and exit of the device. Summary of the invention

[0005] The sealing ring protection sheet for the trocar of the present invention has a special design of a weakened area. When the surgical instrument enters the trocar, the superimposed protection sheet can protect the sealing ring. When the surgical instrument is withdrawn, the design of the weakened area makes it very easy to withdraw and flip up the lower end of the protection sheet during the withdrawal of the surgical instrument, thereby effectively avoiding the protection sheet from being embedded in the convex step or groove of the surgical instrument, and greatly reducing the movement resistance when the surgical instrument is pulled out.

[0006] The sealing ring protection sheet for the puncture device of the present invention is characterized in that: the sealing ring protection sheet 2 for the puncture device comprises a positioning skirt 201, a supporting sheet 202 and a curved surface protection sheet 203;

[0007] A. The positioning skirt 201 is a sheet-like structure, on which a positioning hole 201-1 is provided; the inner side of the positioning skirt 201 is connected to the upper end of the supporting sheet 202;

[0008] B. The support sheet 202 is a sheet-like structure, the upper end of which is connected to the inner side of the positioning skirt 201; and the lower end of which is connected to the upper end of the curved surface protection sheet 203;

[0009] C. A weakened area 203 - 1 is provided on the curved surface protection sheet 203 .

[0010] The weakened zone 203-1 can form an easily deformable zone 20-3 at the lower end of the curved protective sheet 203. When the surgical instrument is pulled out, the easily deformable zone 20-3 deforms preferentially, thereby effectively preventing the lower end of the curved protective sheet 203 from being embedded in the convex step or groove of the surgical instrument, thereby reducing the resistance when the surgical instrument is pulled out.

[0011] The weakened area 203-1 is a weakened groove 203-11 disposed on the right side 203-2 of the curved surface protection sheet 203. Of course, the weakened groove 203-11 can also be disposed on the left side of the curved surface protection sheet 203. In practical applications, the easily deformable area 20-3 is placed on the upper part according to the direction of the weakened groove 203-11, and the sealing ring protection sheet 2 for the puncture device is alternately stacked.

[0012] The weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protection sheet 203; the weakened groove 203-11 includes an upper edge line 203-11-1 and a lower edge line 203-11-2, and the upper edge line 203-11-1 and the lower edge line 203-11-2 are in a cross state; the angle α between the lower edge line 203-11-2 and the bottom edge of the curved protection sheet 203 is ≤90°.

[0013] The area between the lower edge line 203 - 11 - 2 and the bottom edge of the curved protection sheet 203 forms the easy-to-deform area 20 - 3 .

[0014] Usually, the weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protective sheet 203, preferably between 1 / 3 and 2 / 3 of the height of the right side 203-2. At this height, the curved protective sheet 203 can protect the sealing ring and make the deformation force of the easy-to-deform area 20-3 small enough. The angle α is ≤ 90°, and the right side of the easy-to-deform area 20-3 forms a triangular area. Under the action of external force, the sharp corner area of ​​the triangular area is very easy to flip up and deform after being stressed, ensuring that the surgical instrument can quickly pass through the sealing ring protective sheet 2 for the puncture and exit the puncture 29.

[0015] The weakened area 203 - 1 is a weakened pattern 203 - 12 disposed on the back side of the curved protection sheet 203 .

[0016] The area between the weakened pattern 203-12 and the bottom edge of the curved protection sheet 203 forms the easily deformed area 20-3. When the surgical instrument is withdrawn, the weakened pattern 203-12 is first deformed by force, thereby driving the easily deformed area 20-3 to deform, and the surgical instrument can withdraw from the puncture device 29 with low resistance.

[0017] The weakened lines 203-12 are strip groove structures. The weakened lines 203-12 can also be corrugated grooves, or multiple parallel strip groove structures and other various specific structures, which the applicant will not give examples one by one here, but they all do not depart from the protection scope of this application.

[0018] The angle β between the weakened pattern 203-12 and the bottom edge of the curved protection sheet 203 is in the range of 10° to 170°. The angle β is preferably in the range of 30° to 60°.

[0019] The depth h of the weakened pattern 203-12 is less than the thickness d of the curved protective sheet 203. Since the depth h of the weakened pattern 30-1 is less than the thickness d of the protective sheet, it can be ensured that when the surgical instrument enters the puncture device 100, the contact surface of the protective sheet 30 is a smooth surface, which protects the sealing ring from being damaged by the surgical instrument and does not cause additional resistance to the entry of the surgical instrument.

[0020] The angle between the curved protection sheet 203 and the support sheet 202 is ≥90°, usually between 90° and 170°.

[0021] Four or more sealing ring protection sheets 2 for puncture devices are alternately stacked and distributed to form a funnel-shaped protection sheet assembly 21.

[0022] Furthermore, the eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees, which can form a funnel-shaped protection sheet assembly 21. The eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees, which can form a symmetrically distributed funnel-shaped structure with good fitting effect on the upper part of the funnel-shaped sealing ring 5. This structure ensures that when the surgical instrument passes through, the contact area between the surgical instrument and the sealing ring 5 is reduced as much as possible due to the funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 alternately stacked, so that while ensuring the sealing performance, the friction resistance of the instrument movement is also reduced as much as possible. This funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 is the best optimized structure.

[0023] The positioning skirt 201 is perpendicular to the support sheet 202. The vertical structure design allows the support sheet 202 to be hung in close contact with the inner wall of the upper pressing plate 1, resulting in a better installation and positioning effect.

[0024] The end sealing assembly 20 comprises the sealing ring protection sheet 2 for the puncture device.

[0025] The end sealing assembly 20 comprises an upper pressing plate 1, a protective sheet 2, a corrugated sealing ring 3, a positioning seat 4, a funnel-shaped sealing ring 5 and a lower pressing plate 6; the eight protective sheets 2 are mounted on the positioning column 1-1 of the upper pressing plate 1 through the positioning holes 201-1, so that two adjacent protective sheets 2 always present the right side 203-2 of the curved protective sheet 203 pressing the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, always keeping the right side 203-2 of the curved protective sheet 203 always in the upper layer, and the left side 203-3 of the curved protective sheet 203 always in the lower layer, and the alternating superposition distribution constitutes an annular funnel-shaped protective sheet assembly 21; the positioning hole 3-1 of the corrugated sealing ring 3 is sleeved on the positioning hole 3-1 of the upper pressing plate 1 On the positioning column 1-1, the annular funnel-shaped protective sheet assembly 21 is installed between the corrugated sealing ring 3 and the upper pressure plate 1; the positioning seat 4 is provided with an upper positioning hole 4-1 and a lower positioning hole 4-2, the positioning column 1-1 of the upper pressure plate 1 is embedded in the upper positioning hole 4-1 of the positioning seat 4, and the protective sheet 2 and the corrugated sealing ring 3 are installed in sequence between the upper pressure plate 1 and the positioning seat 4; the funnel-shaped sealing ring 5 is provided with a positioning hole 5-1, and the lower pressure plate 6 is provided with a positioning column 6-1, the positioning column 6-1 of the lower pressure plate 6 passes through the positioning hole 5-1 of the funnel-shaped sealing ring 5 and is embedded in the lower positioning hole 4-2 of the positioning seat 4, and the funnel-shaped sealing ring 5 is installed between the lower pressure plate 6 and the positioning seat 4.

[0026] The end sealing assembly 20 adopts the annular funnel-shaped protective sheet assembly 21, which not only ensures that the funnel-shaped sealing ring 5 is not punctured by surgical instruments during surgery, but also reduces the resistance during movement, thereby ensuring the smoothness of the movement of surgical instruments.

[0027] The puncture device is characterized in that: the puncture device 29 contains the sealing ring protection sheet 2 used for the puncture device.

[0028] The piercer 29 includes the end sealing assembly 20 .

[0029] The puncture device 29 comprises a sheath tube 100 and a puncture rod 200. The sheath tube 100 comprises an end cap 101 and a sleeve assembly 102. The end sealing assembly 20 is embedded between an upper shell 101-1 and a lower shell 101-2 of the end cap 101.

[0030] The sealing ring protection sheet for the puncture device of the present invention comprises a positioning skirt 201, a support sheet 202 and a curved surface protection sheet 203. The upper end of the support sheet 202 is connected to the inner side of the positioning skirt 201, and the lower end thereof is connected to the upper end of the curved surface protection sheet 203. A weakened area 203-1 is provided on the curved surface protection sheet 203, and the weakened area 203-1 is a weakened groove 203-11 arranged on the side of the curved surface protection sheet 203 or a weakened pattern 203-12 arranged on the back. The easily deformable area 20-3 is formed between the weakened groove 203-11 or the weakened pattern 203-12 and the bottom edge of the curved surface protection sheet 203. When the surgical instrument is pulled out, the easily deformable area 20-3 is deformed first, thereby effectively avoiding the lower end of the curved surface protection sheet 203 from being embedded in the convex step or groove of the surgical instrument, thereby reducing the resistance when the surgical instrument is pulled out. The puncture device including the sealing ring protection sheet for the puncture device of the present invention can ensure that the funnel-shaped sealing ring 5 is not punctured by the surgical instrument during the operation, thereby ensuring good sealing performance, and reduces the resistance during movement, especially reduces the movement resistance when the surgical instrument is pulled out, thereby ensuring the smoothness of the surgical instrument during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of a sealing ring protection sheet for a puncture device of the present invention containing a weakened groove.

[0032] Figure 2 The present invention is a front view of a sealing ring protection sheet for a trocar.

[0033] Figure 2-1 yes Figure 2 Top view of the .

[0034] Figure 2-2 yes Figure 2 Bottom view of .

[0035] Figure 2-3 yes Figure 2 Side view of.

[0036] Figure 2-4 yes Figure 2 Side view of.

[0037] Figure 3 The utility model relates to a protective sheet assembly composed of 8 sealing ring protective sheets for a puncture device of the present invention.

[0038] Figure 3-1 yes Figure 3 Exploded diagram.

[0039] Figure 3-2 yes Figure 3 Bottom view of .

[0040] Figure 3-3 yes Figure 3-2 Exploded diagram.

[0041] Figure 3-4 yes Figure 3 main view.

[0042] Figure 3-5 yes Figure 3 AA section view.

[0043] Figure 4 It is a top view of the end seal assembly of the present invention.

[0044] Figure 4-1 yes Figure 4 main view.

[0045] Figure 4-2 yes Figure 4-1 Bottom view of .

[0046] Figure 4-3 yes Figure 4-1 Schematic diagram of the top view of the three-dimensional structure.

[0047] Figure 4-4 yes Figure 4-1 Schematic diagram of the three-dimensional structure viewed from above.

[0048] Figure 4-5 yes Figure 4 BB cross-sectional view.

[0049] Figure 4-6 yes Figure 4-1 Exploded view from top down.

[0050] Figure 4-7 yes Figure 4-1 Explosion diagram when looking up.

[0051] Figure 5 Yes Figure 4 A schematic structural diagram of the puncture device of the present invention.

[0052] Figure 6 It is a three-dimensional structural schematic diagram of a sealing ring protection sheet for a puncture device of the present invention containing a weakened groove.

[0053] Figure 6-1 yes Figure 6 Rear view stereogram.

[0054] Figure 7 The present invention is a front view of a sealing ring protection sheet for a trocar.

[0055] Figure 7-1 yes Figure 7 Top view of the .

[0056] Figure 7-2 yes Figure 7 Bottom view of .

[0057] Figure 7-3 yes Figure 7 Side view of.

[0058] Figure 7-4 yes Figure 7 Side view of.

[0059] Figure 8 The utility model relates to a protective sheet assembly composed of 8 sealing ring protective sheets for a puncture device of the present invention.

[0060] Figure 8-1 yes Figure 8 Exploded diagram.

[0061] Figure 8-2 yes Figure 8 Bottom view of .

[0062] Figure 8-3 yes Figure 8-2 Exploded diagram.

[0063] Figure 8-4 yes Figure 8 main view.

[0064] Figure 8-5 yes Figure 8 CC cross-sectional view.

[0065] Fig. 9 It is a top view of the end seal assembly of the present invention.

[0066] Figure 9-1 yes Fig. 9 main view.

[0067] Figure 9-2 yes Figure 9-1 Bottom view of .

[0068] Figure 9-3 yes Figure 9-1 Schematic diagram of the top view of the three-dimensional structure.

[0069] Figure 9-4 yes Figure 9-1 Schematic diagram of the three-dimensional structure viewed from above.

[0070] Figure 9-5 yes Fig. 9 DD cross-sectional view.

[0071] Figure 9-6 yes Figure 9-1 Exploded view from top down.

[0072] Figure 9-7 yes Figure 9-1 Explosion diagram when looking up.

[0073] Fig.10 Yes Fig. 9 A schematic structural diagram of the puncture device of the present invention.

[0074] In the above figure:

[0075] 1 is an upper pressure plate, 2 is a sealing ring protection sheet for the puncture device, 3 is a corrugated sealing ring, 4 is a positioning seat, 5 is a funnel-shaped sealing ring, 6 is a lower pressure plate, 9 is a surgical instrument channel, 20 is an end sealing assembly, 21 is a protection sheet assembly, and 29 is a puncture device.

[0076] On the seal protector for the trocar:

[0077] 201 is a positioning skirt, 202 is a supporting sheet, 203 is a curved surface protection sheet, and 20-3 is an easily deformable area.

[0078] 201-1 is a positioning hole.

[0079] 203-1 is a weakened area, 203-2 is the right side of the curved surface protection sheet, and 203-3 is the left side of the curved surface protection sheet.

[0080] 203-11 is a weakened groove, and 203-12 is a weakened pattern.

[0081] 203-11-1 is the top line, and 203-11-2 is the bottom line.

[0082] α is the angle between the lower edge line and the bottom edge of the curved surface protection sheet, and β is the angle between the weakened pattern and the bottom edge of the curved surface protection sheet.

[0083] On the end seal assembly:

[0084] 1-1 is the positioning column of the upper pressure plate, 3-1 is the positioning hole of the corrugated sealing ring, 4-1 is the upper positioning hole on the positioning seat, 4-2 is the lower positioning hole on the positioning seat, 5-1 is the positioning hole on the funnel-shaped sealing ring, and 6-1 is the positioning column on the lower pressure plate.

[0085] On the Trocar:

[0086] 100 is a sheath tube, 200 is a puncture rod; 101 is an end cap, 102 is a sleeve assembly; 101-1 is an upper shell, and 101-2 is a lower shell. DETAILED DESCRIPTION

[0087] Example 1: Sealing ring protection sheet for trocar of the present invention containing weakened groove

[0088] refer to Figures 1 to 3-5 In this embodiment, the sealing ring protection sheet 2 for the puncture device includes a positioning skirt 201, a supporting sheet 202 and a curved surface protection sheet 203.

[0089] The positioning skirt 201 is a sheet-like structure, and a positioning hole 201-1 is provided thereon. The inner side of the positioning skirt 201 is connected to the upper end of the supporting sheet 202. The positioning skirt 201 is perpendicular to the supporting sheet 202.

[0090] The support sheet 202 is a sheet-like structure, and its upper end is connected to the inner side of the positioning skirt 201 ; and its lower end is connected to the upper end of the curved surface protection sheet 203 .

[0091] The curved protection sheet 203 is provided with a weakened area 203 - 1 .

[0092] The weakened zone 203-1 can form an easily deformable zone 20-3 at the lower end of the curved protective sheet 203. When the surgical instrument is pulled out, the easily deformable zone 20-3 deforms preferentially, thereby effectively preventing the lower end of the curved protective sheet 203 from being embedded in the convex step or groove of the surgical instrument, thereby reducing the resistance when the surgical instrument is pulled out.

[0093] refer to Figures 1 to 2-4 In this embodiment, the weakened area 203-1 is a weakened groove 203-11 disposed on the right side 203-2 of the curved surface protection sheet 203. Of course, the weakened groove 203-11 can also be disposed on the left side of the curved surface protection sheet 203. In practical applications, the easily deformable area 20-3 is placed on the upper part according to the direction of the weakened groove 203-11, and the sealing ring protection sheet 2 for the puncture device is alternately stacked.

[0094] The weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protection sheet 203; the weakened groove 203-11 includes an upper edge line 203-11-1 and a lower edge line 203-11-2, and the upper edge line 203-11-1 and the lower edge line 203-11-2 are in a cross state; the angle α between the lower edge line 203-11-2 and the bottom edge of the curved protection sheet 203 is ≤90°.

[0095] The area between the lower edge line 203 - 11 - 2 and the bottom edge of the curved protection sheet 203 forms the easy-to-deform area 20 - 3 .

[0096] refer to Figure 5, usually the weakened groove 203-11 is located in the middle of the right side 203-2 of the curved protective sheet 203, preferably between 1 / 3 and 2 / 3 of the height of the right side 203-2. At this height, the curved protective sheet 203 can protect the sealing ring and make the deformation force of the easy-to-deform area 20-3 small enough. The angle α is ≤ 90°, and the right side of the easy-to-deform area 20-3 forms a triangular area. Under the action of external force, the sharp corner area of ​​the triangular area is very easy to flip up and deform after being stressed, ensuring that the surgical instrument can quickly pass through the sealing ring protective sheet 2 for the puncture and exit the puncture 29.

[0097] The angle α between the curved protection sheet 203 and the support sheet 202 is greater than 90°. In this embodiment, the angle α is between 120° and 170°.

[0098] The positioning skirt 201 is perpendicular to the support sheet 202. The vertical structure design allows the support sheet 202 to be hung in close contact with the inner wall of the upper pressing plate 1, resulting in a better installation and positioning effect.

[0099] In this embodiment, eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees to form a funnel-shaped protection sheet assembly 21. Figure 3 to Figure 3-5 . The eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees, which can form a symmetrically distributed funnel-shaped structure with good fitting effect on the upper part of the funnel-shaped sealing ring 5. This structure ensures that when the surgical instrument passes through, the funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 alternately stacked can reduce the contact area between the surgical instrument and the sealing ring 5 as much as possible, so while ensuring the sealing performance, the friction resistance of the instrument movement is also reduced as much as possible. The funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 is the best optimized structure.

[0100] The easily deformable area 20-3 is formed between the weakened groove 203-11 and the bottom edge of the curved protection sheet 203. When the surgical instrument is pulled out, the easily deformable area 20-3 is deformed first, thereby effectively preventing the lower end of the curved protection sheet 203 from being embedded in the convex step or groove of the surgical instrument, thereby reducing the resistance when the surgical instrument is pulled out.

[0101] Example 2: Sealing ring protection sheet for puncture device of the present invention with weakened lines

[0102] refer to Figure 6 to Figure 8-5 The difference between this embodiment and embodiment 1 is that, in this embodiment, the weakened area 203 - 1 is a weakened pattern 203 - 12 arranged on the back side of the curved protection sheet 203 .

[0103] refer to Figure 6-1 The area between the weakened line 203-12 and the bottom edge of the curved protection sheet 203 forms the easily deformable area 20-3. When the surgical instrument is withdrawn, the weakened line 203-12 is first deformed by force, thereby driving the easily deformable area 20-3 to deform, and the surgical instrument can withdraw from the puncture device 29 with low resistance.

[0104] In this embodiment, the weakened lines 203-12 are strip groove structures. The weakened lines 203-12 can also be corrugated grooves, or multiple parallel strip groove structures and other various specific structures, which the applicant does not give examples one by one here, but they all do not deviate from the protection scope of this application.

[0105] refer to Figure 6-1 The angle β between the weakened pattern 203-12 and the bottom edge of the curved protection sheet 203 is in the range of 10° to 170°. The angle β is preferably in the range of 30° to 60°.

[0106] The depth h of the weakened pattern 203-12 is less than the thickness d of the curved protective sheet 203. Since the depth h of the weakened pattern 30-1 is less than the thickness d of the protective sheet, it can be ensured that when the surgical instrument enters the puncture device 100, the contact surface of the protective sheet 30 is a smooth surface, which protects the sealing ring from being damaged by the surgical instrument and does not cause additional resistance to the entry of the surgical instrument.

[0107] In this embodiment, eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees to form a funnel-shaped protection sheet assembly 21. Figure 8 to Figure 8-5 . The eight sealing ring protection sheets 2 for the puncture device are alternately stacked and distributed along 45 degrees, which can form a symmetrically distributed funnel-shaped structure with good fitting effect on the upper part of the funnel-shaped sealing ring 5. This structure ensures that when the surgical instrument passes through, the funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 alternately stacked can reduce the contact area between the surgical instrument and the sealing ring 5 as much as possible, so while ensuring the sealing performance, the friction resistance of the instrument movement is also reduced as much as possible. The funnel-shaped protection sheet assembly 21 formed by the eight sealing ring protection sheets 2 is the best optimized structure.

[0108] refer to Fig.10 The weakened pattern 203-12 is arranged on the back side of the curved protection sheet 203, so that when the surgical instrument enters, the front side of the curved protection sheet 203 is overlapped to form a complete protection surface, which can better protect the sealing ring 5 from being punctured by the surgical instrument, and the use process is very safe.

[0109] In practical applications, the weakened groove 203-11 and the weakened pattern 203-12 can be simultaneously arranged on the sealing ring protective sheet 2 for the puncture device to further reduce the movement resistance when the surgical instrument is withdrawn. The applicant will not give specific examples here, but they do not deviate from the protection scope of this application.

[0110] Example 3: End seal assembly of the present invention

[0111] refer to Figure 4 to Figure 4-7 The end sealing assembly of the present invention comprises the sealing ring protection sheet 2 for the puncture device described in Example 1, and an annular funnel-shaped protection sheet assembly 21 composed of the sealing ring protection sheet 2 for the puncture device.

[0112] The end sealing assembly 20 comprises an upper pressure plate 1, a protective sheet 2, a corrugated sealing ring 3, a positioning seat 4, a funnel-shaped sealing ring 5 and a lower pressure plate 6. Figure 4-6 and Figure 4-7 .

[0113] The eight protective sheets 2 are installed on the positioning column 1-1 of the upper pressing plate 1 through the positioning holes 201-1, so that the two adjacent protective sheets 2 always present the right side 203-1 of the curved protective sheet 203 pressing the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, and the right side 203-1 of the curved protective sheet 203 is always kept in the upper layer, and the left side 203-3 of the curved protective sheet 203 is always kept in the lower layer, and the alternating superposition distribution forms an annular funnel-shaped protective sheet assembly 21, refer to Figure 3 to Figure 3-5 .

[0114] The positioning hole 3-1 of the corrugated sealing ring 3 is sleeved on the positioning column 1-1 of the upper pressing plate 1, and the annular funnel-shaped protective sheet assembly 21 is installed between the corrugated sealing ring 3 and the upper pressing plate 1. The positioning seat 4 is provided with an upper positioning hole 4-1 and a lower positioning hole 4-2, and the positioning column 1-1 of the upper pressing plate 1 is embedded in the upper positioning hole 4-1 of the positioning seat 4, and the protective sheet 2 and the corrugated sealing ring 3 are sequentially installed between the upper pressing plate 1 and the positioning seat 4. The funnel-shaped sealing ring 5 is provided with a positioning hole 5-1, and the lower pressing plate 6 is provided with a positioning column 6-1. The positioning column 6-1 of the lower pressing plate 6 passes through the positioning hole 5-1 of the funnel-shaped sealing ring 5 and is embedded in the lower positioning hole 4-2 of the positioning seat 4. The funnel-shaped sealing ring 5 is installed between the lower pressing plate 6 and the positioning seat 4, refer to Figure 4 to Figure 4-5 .

[0115] refer to Figure 9 to Figure 9-7 The end sealing assembly of the present invention comprises the sealing ring protection sheet 2 for the puncture device described in Example 2, and an annular funnel-shaped protection sheet assembly 21 composed of the sealing ring protection sheet 2 for the puncture device.

[0116] The end sealing assembly 20 comprises an upper pressure plate 1, a protective sheet 2, a corrugated sealing ring 3, a positioning seat 4, a funnel-shaped sealing ring 5 and a lower pressure plate 6. Figure 9-6 and Figure 9-7 .

[0117] The eight protective sheets 2 are installed on the positioning column 1-1 of the upper pressing plate 1 through the positioning holes 201-1, so that the two adjacent protective sheets 2 always present the right side 203-1 of the curved protective sheet 203 pressing the left side 203-3 of the curved protective sheet 203 of the adjacent protective sheet 2, and the right side 203-1 of the curved protective sheet 203 is always kept in the upper layer, and the left side 203-3 of the curved protective sheet 203 is always kept in the lower layer, and the alternating superposition distribution forms an annular funnel-shaped protective sheet assembly 21, refer to Figure 3 to Figure 3-5 .

[0118] The positioning hole 3-1 of the corrugated sealing ring 3 is sleeved on the positioning column 1-1 of the upper pressing plate 1, and the annular funnel-shaped protective sheet assembly 21 is installed between the corrugated sealing ring 3 and the upper pressing plate 1. The positioning seat 4 is provided with an upper positioning hole 4-1 and a lower positioning hole 4-2, and the positioning column 1-1 of the upper pressing plate 1 is embedded in the upper positioning hole 4-1 of the positioning seat 4, and the protective sheet 2 and the corrugated sealing ring 3 are sequentially installed between the upper pressing plate 1 and the positioning seat 4. The funnel-shaped sealing ring 5 is provided with a positioning hole 5-1, and the lower pressing plate 6 is provided with a positioning column 6-1. The positioning column 6-1 of the lower pressing plate 6 passes through the positioning hole 5-1 of the funnel-shaped sealing ring 5 and is embedded in the lower positioning hole 4-2 of the positioning seat 4. The funnel-shaped sealing ring 5 is installed between the lower pressing plate 6 and the positioning seat 4, refer to Figure 4 to Figure 4-5 , Figure 9 to Figure 9-5 .

[0119] The end sealing assembly 20 adopts the annular funnel-shaped protective sheet assembly 21, which not only ensures that the funnel-shaped sealing ring 5 is not punctured by surgical instruments during surgery, but also reduces the resistance during movement, thereby ensuring the smoothness of the movement of surgical instruments, especially facilitating the insertion and removal of various special-shaped instruments.

[0120] Example 4: The puncture device of the present invention

[0121] refer to Figure 5 and Fig.10 In this embodiment, the puncture device 29 includes the end sealing assembly 20 described in Example 3.

[0122] The puncture device 29 comprises a sheath tube 100 and a puncture rod 200. The sheath tube 100 comprises an end cap 101 and a sleeve assembly 102. The end sealing assembly 20 is embedded between an upper shell 101-1 and a lower shell 101-2 of the end cap 101.

[0123] Regardless of the structure of the puncture rod 200 and the sleeve assembly 102, the core of the puncture device 29 described in this embodiment is that the end sealing assembly 20 of the puncture device 29 adopts an annular funnel-shaped protective sheet assembly 21 composed of the sealing ring protective sheets 2 for the puncture device described in Example 1 and Example 2 alternately stacked.

[0124] Due to the structural design of the weakened area 203-1 on the curved protection sheet 203 of the sealing ring protection sheet 2 of the puncture device, it can ensure that the funnel-shaped sealing ring 5 is not punctured by the surgical instrument during the operation, ensuring good sealing, and reduce the resistance during movement, especially reduce the movement resistance when the surgical instrument is pulled out, thereby ensuring the smoothness of the surgical instrument during movement.

[0125] 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 sealing ring protection sheet for a trocar, characterized in that: The sealing ring protection sheet (2) for the trocar comprises a positioning skirt (201), a supporting sheet (202) and a curved surface protection sheet (203); A. The positioning skirt (201) is a sheet-like structure, and is provided with a positioning hole (201-1); the inner side of the positioning skirt (201) is connected to the upper end of the supporting sheet (202); B. The support sheet (202) is a sheet-like structure, the upper end of which is connected to the inner side of the positioning skirt (201); and the lower end of which is connected to the upper end of the curved surface protection sheet (203); C. A weakened area (203-1) is provided on the curved surface protection sheet (203); the weakened area (203-1) is a weakened groove (203-11) arranged in the middle of the right side (203-2) of the curved surface protection sheet (203) or a weakened pattern (203-12) arranged on the back side of the curved surface protection sheet (203); the angle β between the weakened pattern (203-12) and the bottom edge of the curved surface protection sheet (203) ranges from 10° to 170°; the weakened groove (203-11) includes an upper edge line (203-11-1) and a lower edge line (203-11-2); the upper edge line (203-11-1) and the lower edge line (203-11-2) are in a cross state; the angle α between the lower edge line (203-11-2) and the bottom edge of the curved surface protection sheet (203) is ≤90°.

2. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The weakened pattern (203-12) is in the form of a strip-shaped groove structure.

3. The sealing ring protection sheet for a trocar according to claim 2, characterized in that: The depth h of the weakened pattern (203-12) is less than the thickness d of the curved surface protection sheet (203).

4. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The angle between the curved surface protection sheet (203) and the support sheet (202) is ≥90°.

5. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: Four or more sealing ring protection sheets (2) for puncture devices are alternately stacked and distributed to form a funnel-shaped protection sheet assembly (21).

6. The sealing ring protection sheet for a trocar according to claim 5, characterized in that: The eight sealing ring protection sheets (2) for the puncture device are alternately stacked and distributed along a 45° angle to form a funnel-shaped protection sheet assembly (21).

7. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The positioning skirt (201) is perpendicular to the supporting sheet (202).

8. An end sealing assembly, characterized in that: The end sealing assembly (20) comprises the sealing ring protection sheet (2) for the puncture device according to claim 1.

9. The end seal assembly according to claim 8, characterized in that: The end sealing assembly (20) comprises an upper pressing plate (1), a sealing ring protection sheet (2), a corrugated sealing ring (3), a positioning seat (4), a funnel-shaped sealing ring (5) and a lower pressing plate (6); eight sealing ring protection sheets (2) are mounted on the positioning column (1-1) of the upper pressing plate (1) through the positioning holes (201-1) of the positioning skirt, so that the right side (203-2) of the curved surface protection sheet (203) of two adjacent sealing ring protection sheets (2) always presses the left side (203-3) of the curved surface protection sheet (203) of the adjacent sealing ring protection sheet (2), so that the right side (203-2) of the curved surface protection sheet (203) is always in the upper layer, and the left side (203-3) of the curved surface protection sheet (203) is always in the lower layer, and the alternating superposition distribution forms an annular funnel-shaped protection sheet assembly (21); the positioning hole (3-1) of the corrugated sealing ring (3) is sleeved on the upper pressing plate (1) The annular funnel-shaped protective sheet assembly (21) is mounted on a positioning column (1-1) of the upper pressing plate (1); the annular funnel-shaped protective sheet assembly (21) is mounted between the corrugated sealing ring (3) and the upper pressing plate (1); the positioning seat (4) is provided with an upper positioning hole (4-1) and a lower positioning hole (4-2); the positioning column (1-1) of the upper pressing plate (1) is embedded in the upper positioning hole (4-1) of the positioning seat (4); the sealing ring protective sheet (2) and the corrugated sealing ring (3) are sequentially mounted between the upper pressing plate (1) and the positioning seat (4); the funnel-shaped sealing ring (5) is provided with a positioning hole (5-1); the lower pressing plate (6) is provided with a positioning column (6-1); the positioning column (6-1) of the lower pressing plate (6) passes through the positioning hole (5-1) of the funnel-shaped sealing ring (5) and is embedded in the lower positioning hole (4-2) of the positioning seat (4); the funnel-shaped sealing ring (5) is mounted between the lower pressing plate (6) and the positioning seat (4).

10. A trocar, characterized in that: The puncture device (29) comprises the sealing ring protection sheet (2) for the puncture device according to claim 1.

11. The trocar according to claim 10, characterized in that: The piercer (29) comprises the end sealing assembly (20) according to claim 9.

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