Sealing-ring protection element for trocar, and end sealing assembly and trocar

Abstract

A sealing-ring protection element (2) for a trocar, and an end sealing assembly (20) comprising the sealing-ring protection element (2). The sealing-ring protection element (2) is a strip-shaped protection element (22) which is made of a flexible and / or elastic material and has a strip-shaped structure; after the strip-shaped protection element (22) is connected to a forming positioning member (21), a cylindrical or cylinder-like structure having a crack (22-21) at the lower portion thereof is formed; and after the sealing-ring protection element (2) is mounted in a funnel-shaped sealing ring (1), protection element bodies (22-2) automatically deform and are then alternately distributed to form a funnel shape, thereby protecting the funnel-shaped sealing ring (1). When a surgical instrument is withdrawn, the width of a single protection element body (22-2) of the sealing-ring protection element (2) is small, and is easily deformed, such that the sealing-ring protection element (2) does not cause obstruction to the movement of the surgical instrument. A trocar (900) comprising the end sealing assembly (20) ensures good puncture resistance, and can also maintain low resistance to movement for a long time, thereby ensuring the smooth progress of a surgical procedure.

Description

Sealing ring protection sheet for trocar, end sealing assembly and trocar Technical Field

[0001] The present invention relates to a surgical instrument, in particular to a sealing ring protective sheet, an end sealing component and a puncture device used in laparoscopic surgery. Background Art

[0002] Laparoscopic surgery is becoming increasingly common, and to prevent nosocomial infections, the use of disposable trocars is also increasing. During the frequent insertion and removal of surgical instruments, ensuring the dynamic sealing of the trocar is crucial for a smooth surgical procedure. Furthermore, a variety of surgical instruments are used during surgery, so the trocar must be adaptable to these various shapes, facilitating their entry and exit. Furthermore, low resistance must be maintained during the insertion and removal process to ensure smooth instrument movement.

[0003] In the prior art, the most common radial sealing ring is a funnel-shaped sealing ring. To ensure that the sealing ring is not punctured by surgical instruments during prolonged surgical procedures, causing leakage, a sealing ring protective 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 protective sheet through the radial sealing ring. The design of the sealing ring protective 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. However, conversely, the sealing ring protective sheet itself will increase the movement resistance of the instrument in and out. In particular, for special-shaped surgical instruments, such as 7-shaped forceps, or surgical instruments with convex steps or grooves, the protective 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.

[0005] Summary of the Invention

[0006] The sealing ring protection sheet for the puncture device of the present invention is designed as a strip-shaped multi-piece protection sheet. The funnel-shaped structure formed by the alternating distribution of the protection sheet after automatic deformation is used to effectively protect the funnel-shaped sealing ring. Since the protection sheet adopts the method of stacking multiple small strips, it can effectively avoid the excessive movement resistance caused by the instrument being embedded in the protection sheet during the entry and exit process, thereby ensuring the smooth progress of the surgical process.

[0007] The sealing ring protection sheet for the trocar of the present invention is characterized in that: the sealing ring protection sheet 2 for the trocar is a strip-shaped protection sheet 22;

[0008] A. The strip-shaped protective sheet 22 is made of a flexible and / or elastic material and has a strip-shaped structure; the strip-shaped protective sheet 22 includes a connecting end 22-1 and a protective sheet 22-2;

[0009] B. The strip-shaped protection sheet 22 includes at least two protection sheets 22-2, and the protection sheets 22-2 are arranged below the connection end 22-1 and distributed along the length direction of the connection end 22-1;

[0010] C. The strip-shaped protective sheet 22 is connected end to end to form a cylindrical or quasi-cylindrical structure with a crack 22-21 at the lower part; after the sealing ring protective sheet 2 for the puncture device is installed in the funnel-shaped sealing ring 1, the protective sheet 22-2 automatically deforms and is alternately distributed to form a funnel shape, which fits with the funnel surface of the funnel-shaped sealing ring 1 to protect the funnel-shaped sealing ring 1.

[0011] The sealing ring protection sheet for the puncture device of the present invention is made of a soft elastic material as a whole. In the unfolded state before assembly, it is a thin strip structure. After the end is connected, it can be rolled into a cylindrical or cylindrical-like structure, such as forming a cylindrical structure around the molded positioning member 21. The crack 22-21 is formed between the protective sheet 22-2 arranged at the lower end of the connecting end 22-1. After the funnel-shaped sealing ring 1 is installed, the protective sheet 22-2 is automatically deformed and alternately distributed to form a funnel shape, which can fit with the funnel surface of the funnel-shaped sealing ring 1 to protect the funnel-shaped sealing ring 1.

[0012] When the instrument enters, since the protective sheet 22-2 fits the funnel-shaped sealing ring 1 along the funnel direction, the instrument can be prevented from directly scratching the funnel-shaped sealing ring 1. When the instrument exits, since the width of the protective sheet 22-2 is very small, it is very easy to deform and will not hinder the movement of the instrument. Therefore, it can well prevent the instrument from being stuck or the movement resistance is large, resulting in poor movement, and clinical use is very convenient. Since the protective sheet 22-2 adopts a thin strip design, it can automatically deform and distribute alternately. Therefore, there is no need to pre-shape the protective sheet 22-2, and it can adapt well to different sealing ring sizes and structures. It has a wide range of applications in actual applications. The integrated design of the connecting end 22-1 can be easily connected and installed with the molded positioning piece 21, effectively solving the problem of the complex assembly process of the current multi-piece protective sheet, and the actual production cost is also very low.

[0013] The strip-shaped protective sheet 22 is a thin, rectangular strip-like structure, with the slits 22-21 distributed along its width. The length of the slits 22-21 is at least 1 / 2 of the width of the rectangular strip. The slits 22-21 are preferably at least 2 / 3 of the width of the rectangular strip. This allows for better automatic deformation and prevents the protective sheet 22-2 from becoming stuck during withdrawal, resulting in excessive resistance to movement.

[0014] The strip-shaped protective sheet 22 includes six or more protective sheets 22-2. To ensure that the protective sheet 22-2 is a small, thin strip structure and achieves the desired protection effect while ensuring good deformation ability and ensuring smooth entry and exit of the device, the number of protective sheets 22-2 can be as large as possible, and generally needs to be at least six or more.

[0015] The shape of the protective sheet 22-2 is a rectangle, a trapezoid, a triangle, or an arc-shaped structure. The shape of the protective sheet 22-2 is usually designed to be a narrow rectangular structure. In actual application, in order to better allow the instrument to be withdrawn and prevent the sharp corners from accidentally catching the instrument, the shape of the protective sheet 22-2 can also be designed to be a trapezoid, an arc-shaped, or other shapes. The applicant only specifically illustrates the above-mentioned shapes. In actual application, those skilled in the art can design different shapes as needed. The applicant does not illustrate them one by one here, but they all do not depart from the scope of protection of this application.

[0016] The end sealing assembly of the present invention comprises the sealing ring protection sheet 2 for the puncture device.

[0017] The end sealing assembly 20 includes a sealing ring protective sheet 2 for the puncture device, a funnel-shaped sealing ring 1 and a molded positioning piece 21; the sealing ring protective sheet 2 for the puncture device is connected to the molded positioning piece 21 through the connecting end 22-1 to form a cylindrical or quasi-cylindrical structure with a crack 22-21 at the lower part; a mounting position 11 is provided in the funnel-shaped sealing ring 1, and the molded positioning piece 21 has a structure matching the mounting position 11 and is embedded in the mounting position 11. The protective sheet 22-2 is automatically deformed and alternately distributed to form a funnel shape, which fits the funnel surface of the funnel-shaped sealing ring 1 to constitute the end sealing assembly 20.

[0018] The connecting end 22-1 is installed around the molded positioning member 21, and the gap 22-21 is formed between the protective sheets 22-2. After the funnel-shaped sealing ring 1 is installed, the protective sheets 22-2 automatically deform and are alternately distributed to form a funnel shape, thereby conforming to the funnel surface of the funnel-shaped sealing ring 1 and protecting the funnel-shaped sealing ring 1. A single piece of the sealing ring protective sheet 2 for the puncture device can be formed around the molded positioning member 21 to form a cylindrical structure, or a plurality of pieces of the sealing ring protective sheet 2 for the puncture device can be formed by sequentially surrounding the molded positioning member 21 to form a cylindrical structure.

[0019] The molded positioning member 21 is provided with an annular positioning groove 21-1. The connecting end 22-1 is a sheet-like, strip-like structure that fits into the annular positioning groove 21-1, forming a cylindrical structure. This embedded connection between the positioning groove and the sheet-like structure is very convenient for installation. Moreover, the molded positioning member 21 can be designed with a smooth outer surface, which ensures a good fit and fixation with the funnel-shaped sealing ring 1.

[0020] The molded positioning member 21 is provided with a positioning pin 21-2, and the connecting end 22-1 is provided with a connecting hole 22-11. The connecting hole 22-11 is embedded in the positioning pin 21-2 to connect the strip-shaped protective sheet 22 to the molded positioning member 21. This connection method of the positioning pin and the connecting hole can effectively prevent the strip-shaped protective sheet 22 from detaching from the molded positioning member 21, and the connection is more secure.

[0021] The applicant only specifically illustrates the two connection methods between the strip-shaped protective sheet 22 and the molded positioning member 21. In actual applications, technicians in this field can also design different connection methods as needed, such as bonding, snap fastening and other methods. The applicant does not give examples one by one here, but they do not deviate from the scope of protection of this application.

[0022] The molded positioning member 21 is made of a rigid medical material. The molded positioning member 21 is typically made of a medical material with a certain degree of rigidity, such as PC or PP. Due to the excellent rigidity of the molded positioning member 21, when inserted into the mounting portion 11, the funnel-shaped sealing ring 1 is made of a soft material. Therefore, the mounting portion 11 can well wrap around the molded positioning member 21, making it less likely to fall out.

[0023] The molded positioning member 21 is an annular structure, a funnel-shaped structure, or an elliptical structure. The molded positioning member 21 can adopt a simple annular structure for ease of installation, or a funnel-shaped structure to adapt to the funnel-shaped sealing portion of the funnel-shaped sealing ring 1 as needed, or can be designed into an elliptical or other shape according to the product appearance requirements. The applicant does not provide examples here, but all of these do not depart from the scope of protection of this application.

[0024] In order to match different installation structures, the end sealing assembly 20 can also be used in conjunction with other connection structures such as a positioning card plate to achieve effective installation of the puncture device of the present invention.

[0025] The trocar of the present invention comprises the sealing ring protection sheet 2 for the trocar.

[0026] The puncture device 900 includes the end sealing assembly 20 .

[0027] The puncture device 900 includes a puncture rod 100 and a puncture sheath 200; the puncture sheath 200 includes an end cap 201 and a sleeve assembly 202, and the end sealing assembly 20 is embedded between the upper shell 201-1 and the lower shell 201-2 of the end cap 201.

[0028] The puncture sheath 200 includes an end cap 201 and a sleeve assembly 202. The sleeve assembly 202 is arranged at the distal end of the end cap 201. The sleeve assembly 202 can be manufactured integrally with the end cap 201, or can be connected into a whole through a detachable connection. The end cap 201 includes an upper shell 201-1 and a lower shell 201-2. A positioning pressure ring 3, the end sealing assembly 20, and an inner cavity seal 4 are sequentially arranged between the upper shell 201-1 and the lower shell 201-2. When the instrument enters, the funnel-shaped sealing ring 1 wraps around the instrument to perform a seal. When the instrument is withdrawn, the inner cavity seal 4 is reset under the action of the intra-abdominal air pressure to achieve a seal.

[0029] Since the puncture device 900 of the present invention is equipped with the end sealing assembly 20 composed of the sealing ring protection sheet for the puncture device of the present invention, it can ensure good puncture resistance and maintain very low movement resistance for a long time during clinical use, and the clinical use process is very safe and convenient.

[0030] The sealing ring protection sheet for the puncture device of the present invention is a strip-shaped protection sheet 22. The strip-shaped protection sheet 22 includes a connecting end 22-1 and a protection sheet 22-2. The strip-shaped protection sheet 22 includes at least a plurality of the protection sheets 22-2. The protection sheets 22-2 are arranged below the connecting end 22-1. The strip-shaped protection sheet 22 is made of a flexible and / or elastic material and has a band-shaped structure. After being connected to the molded positioning member 21, it has a cylindrical or quasi-cylindrical structure with a crack 22-21 at the bottom. After the sealing ring protection sheet 2 for the puncture device is installed in the funnel-shaped sealing ring 1, the protection sheets 22-2 automatically deform and are alternately distributed to form a funnel shape, which fits the funnel surface of the funnel-shaped sealing ring 1 to protect the funnel-shaped sealing ring 1. When the instrument is withdrawn, the protective sheet 22-2 is very small in width and easily deformed, which does not hinder the movement of the instrument. Therefore, it can effectively prevent the instrument from getting stuck or causing poor movement due to high resistance to movement, making clinical use very convenient. The integrated design of the connecting end 22-1 can be easily connected and installed with the molded positioning member 21, effectively solving the problem of complex assembly process of current multi-piece protective sheets, and the actual production cost is very low. The puncture device 900 of the present invention is equipped with the end sealing assembly 20 composed of the sealing ring protective sheet for the puncture device of the present invention. During clinical use, it not only ensures good puncture resistance but also maintains very low movement resistance for a long time, making clinical use very safe and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of the sealing ring protection sheet for the trocar of the present invention when it is unfolded.

[0032] FIG1-1 is a schematic structural diagram of the sealing ring protection sheet for a puncture device of the present invention having a connection hole when unfolded.

[0033] FIG2 is a schematic diagram of the three-dimensional structure of a molded positioning member containing an annular positioning groove.

[0034] Figure 2-1 is a schematic diagram of a strip-shaped protective sheet embedded in a molded positioning piece to form a cylindrical structure.

[0035] Figure 2-2 is a cross-sectional view of Figure 2-1.

[0036] FIG3 is a schematic diagram of the three-dimensional structure of a molded positioning member provided with a positioning pin.

[0037] Figure 3-1 is a schematic diagram of a strip-shaped protective sheet being installed on a molded positioning piece through a connecting hole to form a cylindrical structure.

[0038] FIG4 is a schematic structural diagram of the end sealing assembly of the present invention.

[0039] FIG4-1 is an AA cross-sectional view of FIG4 .

[0040] Figure 4-2 is an enlarged view of point B in Figure 4-1.

[0041] FIG5 is a schematic structural diagram of the puncture sheath of the puncture device of the present invention.

[0042] FIG5-1 is a cross-sectional view of FIG5.

[0043] FIG6 is a schematic structural diagram of the puncture device of the present invention.

[0044] In the figure above: 1 is the funnel-shaped sealing ring, 2 is the sealing ring protection sheet for the trocar, 3 is the positioning pressure ring, 4 is the lumen seal, 20 is the end seal assembly, 100 is the trocar, 200 is the puncture sheath, 201 is the end cap, 202 is the cannula assembly, and 900 is the trocar; 201-1 is the upper shell, 201-2 is the lower shell. 11 is the mounting position, 21 is the molded positioning member, 22 is the strip-shaped protection sheet; 21-1 is the annular positioning groove, 21-2 is the positioning pin, 22-1 is the connecting end, 22-2 is the protection sheet; 22-11 is the connecting hole, and 22-21 is the slit. DETAILED DESCRIPTION

[0045] Example 1: Sealing ring protection sheet for puncture device of the present invention

[0046] 1 and 1 - 1 , in this embodiment, the sealing ring protection sheet 2 for the puncture device is a strip-shaped protection sheet 22 .

[0047] The strip-shaped protective sheet 22 is made of a flexible and / or elastic material and has a strip-shaped structure; the strip-shaped protective sheet 22 includes a connecting end 22 - 1 and a protective sheet 22 - 2 .

[0048] 1 and 1-1 , the strip-shaped protection sheet 22 includes at least two protection sheets 22 - 2 . The protection sheets 22 - 2 are disposed below the connection end 22 - 1 and distributed along the length direction of the connection end 22 - 1 .

[0049] Referring to Figures 2-1 and 3-1, the strip-shaped protective sheet 22 is connected end to end to form a cylindrical or quasi-cylindrical structure with a crack 22-21 at the lower part; after the sealing ring protective sheet 2 for the puncture device is installed in the funnel-shaped sealing ring 1, the protective sheet 22-2 automatically deforms and is alternately distributed to form a funnel shape, which fits with the funnel surface of the funnel-shaped sealing ring 1 to protect the funnel-shaped sealing ring 1.

[0050] The strip-shaped protective sheet 22 is a thin, rectangular strip-like structure, with the slits 22-21 distributed along its width. The length of the slits 22-21 is at least 1 / 2 of the width of the rectangular strip. The slits 22-21 are preferably at least 2 / 3 of the width of the rectangular strip. This allows for better automatic deformation and prevents the protective sheet 22-2 from becoming stuck during withdrawal, resulting in excessive resistance to movement.

[0051] The strip-shaped protective sheet 22 includes six or more protective sheets 22-2. To ensure that the protective sheet 22-2 is a small, thin strip structure and achieves the desired protection effect while ensuring good deformation ability and ensuring smooth entry and exit of the device, the number of protective sheets 22-2 can be as large as possible, and generally needs to be at least six or more.

[0052] The shape of the protective sheet 22-2 is a rectangle, a trapezoid, a triangle, or an arc-shaped structure. The shape of the protective sheet 22-2 is usually designed to be a narrow rectangular structure. In actual application, in order to better allow the instrument to be withdrawn and prevent the sharp corners from accidentally catching the instrument, the shape of the protective sheet 22-2 can also be designed to be a trapezoid, an arc-shaped, or other shapes. The applicant only specifically illustrates the above-mentioned shapes. In actual application, those skilled in the art can design different shapes as needed. The applicant does not illustrate them one by one here, but they all do not depart from the scope of protection of this application.

[0053] The sealing ring protection sheet for the puncture device of this embodiment is made of a soft elastic material as a whole. In the unfolded state before assembly, it is a thin strip structure. After the end is connected, it can be rolled into a cylindrical or cylindrical-like structure, such as forming a cylindrical structure around the molded positioning member 21. The crack 22-21 is formed between the protective sheet 22-2 arranged at the lower end of the connecting end 22-1. After the funnel-shaped sealing ring 1 is installed, the protective sheet 22-2 is automatically deformed and alternately distributed to form a funnel shape, which can fit with the funnel surface of the funnel-shaped sealing ring 1 to protect the funnel-shaped sealing ring 1.

[0054] When the instrument enters, since the protective sheet 22-2 fits the funnel-shaped sealing ring 1 along the funnel direction, the instrument can be prevented from directly scratching the funnel-shaped sealing ring 1. When the instrument exits, since the width of the protective sheet 22-2 is very small, it is very easy to deform and will not hinder the movement of the instrument. Therefore, it can well prevent the instrument from being stuck or the movement resistance is large, resulting in poor movement, and clinical use is very convenient. Since the protective sheet 22-2 adopts a thin strip design, it can automatically deform and distribute alternately. Therefore, there is no need to pre-shape the protective sheet 22-2, and it can adapt well to different sealing ring sizes and structures. It has a wide range of applications in actual applications. The integrated design of the connecting end 22-1 can be easily connected and installed with the molded positioning piece 21, effectively solving the problem of the complex assembly process of the current multi-piece protective sheet, and the actual production cost is also very low.

[0055] Example 2: The trocar end sealing assembly of the present invention

[0056] 2 to 4-2 , in this embodiment, the end sealing assembly 20 includes the sealing ring protection sheet 2 for the puncture device described in Example 1.

[0057] The end sealing assembly 20 includes a sealing ring protection sheet 2 for the puncture device, a funnel-shaped sealing ring 1 and a molded positioning member 21.

[0058] Referring to Figures 2-1 and 3-1, the sealing ring protection sheet 2 for the puncture device is installed around the molded positioning piece 21 through the connecting end 22-1 and is connected to the molded positioning piece 21 to form a cylindrical or quasi-cylindrical structure with a crack 22-21 at the lower part; a mounting position 11 is provided in the funnel-shaped sealing ring 1, and the molded positioning piece 21 has a structure matching the mounting position 11 and is embedded in the mounting position 11. The protective sheet 22-2 is automatically deformed and alternately distributed to form a funnel shape, which fits with the funnel surface of the funnel-shaped sealing ring 1 to constitute the end sealing assembly 20 to protect the funnel-shaped sealing ring 1, refer to Figures 4 to 4-2.

[0059] A single piece of the sealing ring protection sheet 2 for the puncture device may be wrapped around the molded positioning piece 21 to form a cylindrical structure, or a plurality of sealing ring protection sheets 2 for the puncture device may be wrapped around the molded positioning piece 21 in sequence to form a cylindrical structure.

[0060] Referring to Figures 2 through 2-2, the molded positioning member 21 is provided with an annular positioning groove 21-1. The connecting end 22-1 is a sheet-like, strip-like structure that is embedded within the annular positioning groove 21-1, forming a cylindrical structure. This embedded connection between the positioning groove and the sheet-like structure is very convenient for installation, and the molded positioning member 21 can be designed with a smooth outer surface, ensuring a good fit and fixation with the funnel-shaped sealing ring 1.

[0061] 3 and 3-1 , the molded positioning member 21 is provided with a positioning pin 21-2, and the connecting end 22-1 is provided with a connecting hole 22-11. The connecting hole 22-11 is embedded in the positioning pin 21-2 to connect the strip-shaped protective sheet 22 to the molded positioning member 21. This method of connecting the positioning pin and the connecting hole can effectively prevent the strip-shaped protective sheet 22 from detaching from the molded positioning member 21, and the connection is more secure.

[0062] The applicant only specifically illustrates the two connection methods between the strip-shaped protective sheet 22 and the molded positioning member 21. In actual applications, technicians in this field can also design different connection methods as needed, such as bonding, snap fastening and other methods. The applicant does not give examples one by one here, but they do not deviate from the scope of protection of this application.

[0063] In this embodiment, the molded positioning member 21 is made of a rigid medical material. The molded positioning member 21 is typically made of a medical material with a certain degree of rigidity, such as PC or PP. Due to the excellent rigidity of the molded positioning member 21, when inserted into the mounting portion 11, the mounting portion 11 can well wrap around the molded positioning member 21, making it less likely to fall out, as the funnel-shaped sealing ring 1 is made of a soft material.

[0064] In this embodiment, the molded positioning member 21 adopts a simple annular structure for easy installation. The molded positioning member 21 can also be an annular structure, a funnel-shaped structure, or an elliptical structure. Alternatively, the molded positioning member 21 can be a funnel-shaped structure to match the funnel-shaped sealing portion of the funnel-shaped sealing ring 1 as needed, or can be designed into an elliptical or other shape according to the product appearance requirements. The applicant does not provide examples here, but they do not depart from the scope of protection of this application.

[0065] In order to match different installation structures, the end sealing assembly 20 can also be used in conjunction with other connection structures such as positioning card plates to achieve effective installation in the puncture device of the present invention. The applicant does not give specific examples here, but they do not depart from the scope of protection of this application.

[0066] Example 3: The trocar of the present invention

[0067] 5 and 6 , in this embodiment, the puncture device 900 includes the end sealing assembly 20 described in Example 2.

[0068] The puncture device 900 includes a puncture rod 100 and a puncture sheath 200; the puncture sheath 200 includes an end cap 201 and a sleeve assembly 202, and the end sealing assembly 20 is embedded between the upper shell 201-1 and the lower shell 201-2 of the end cap 201.

[0069] Referring to Figure 4-1, the puncture sheath 200 includes an end cap 201 and a sleeve assembly 202. The sleeve assembly 202 is arranged at the distal end of the end cap 201. The sleeve assembly 202 can be manufactured integrally with the end cap 201, or can be connected into a whole through a detachable connection. The end cap 201 includes an upper shell 201-1 and a lower shell 201-2. A positioning pressure ring 3, the end sealing assembly 20, and an inner cavity seal 4 are sequentially arranged between the upper shell 201-1 and the lower shell 201-2. When the instrument enters, the funnel-shaped sealing ring 1 wraps around the instrument to perform a seal. When the instrument is withdrawn, the inner cavity seal 4 is reset under the action of the intra-abdominal air pressure to achieve a seal.

[0070] Since the puncture device 900 of the present invention is equipped with the end sealing assembly 20 composed of the sealing ring protection sheet for the puncture device of the present invention, it can ensure good puncture resistance and maintain very low movement resistance for a long time during clinical use, and the clinical use process is very safe and convenient.

[0071] It should be noted that the structures disclosed and described herein may be replaced by other structures with equivalent effects, and the embodiments described herein are not the only structures for implementing the present invention. Although preferred embodiments of the present invention have been described and illustrated herein, those skilled in the art will readily appreciate that these embodiments are merely illustrative and that numerous variations, modifications, and substitutions may be made by those skilled in the art without departing from the present invention. Therefore, the scope of protection of the present invention should be defined in accordance with the spirit and scope of the appended claims.

Claims

1. A sealing ring protection sheet for a trocar, characterized in that: The sealing ring protection sheet (2) for the trocar is a strip-shaped protection sheet (22); A. The strip-shaped protective sheet (22) is made of a flexible and / or elastic material and has a strip-shaped structure; the strip-shaped protective sheet (22) comprises a connecting end (22-1) and a protective sheet (22-2); B. The strip-shaped protection sheet (22) contains at least two protection sheets (22-2), and the protection sheets (22-2) are arranged below the connection end (22-1) and distributed along the length direction of the connection end (22-1); C. The strip-shaped protective sheet (22) is connected end to end to form a cylindrical or quasi-cylindrical structure with a crack (22-21) at the bottom; after the sealing ring protective sheet (2) for the puncture device is installed in the funnel-shaped sealing ring (1), the protective sheet (22-2) automatically deforms and is alternately distributed to form a funnel shape, which fits the funnel surface of the funnel-shaped sealing ring (1) to protect the funnel-shaped sealing ring (1).

2. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The strip-shaped protection sheet (22) is a thin rectangular strip-shaped structure, the cracks (22-21) are distributed along the width direction, and the length of the cracks (22-21) is not less than 1 / 2 of the width of the rectangular strip-shaped structure.

3. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The strip-shaped protection sheet (22) contains more than 6 protection sheets (22-2).

4. The sealing ring protection sheet for a trocar according to claim 1, characterized in that: The shape of the protection sheet (22-2) is a rectangle, a trapezoid, a triangle, or an arc structure.

5. 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.

6. The end seal assembly according to claim 5, characterized in that: The end sealing assembly (20) comprises a sealing ring protection sheet (2) for a puncture device, a funnel-shaped sealing ring (1) and a molded positioning piece (21); the sealing ring protection sheet (2) for a puncture device is connected to the molded positioning piece (21) through the connecting end (22-1) to form a cylindrical or quasi-cylindrical structure with a crack (22-21) at the bottom; a mounting position (11) is provided in the funnel-shaped sealing ring (1), and the molded positioning piece (21) has a structure matching the mounting position (11) and is embedded in the mounting position (11); the protection sheet (22-2) is automatically deformed and alternately distributed to form a funnel shape, which fits the funnel surface of the funnel-shaped sealing ring (1) to form the end sealing assembly (20).

7. The sealing ring protection sheet for a trocar according to claim 6, characterized in that: The molding positioning piece (21) is provided with an annular positioning groove (21-1), the connecting end (22-1) is a sheet-shaped or belt-shaped structure, and the connecting end (22-1) is embedded in the annular positioning groove (21-1) to form a cylindrical structure.

8. The sealing ring protection sheet for a trocar according to claim 6, characterized in that: The molding positioning piece (21) is provided with a positioning pin (21-2), and the connecting end (22-1) is provided with a connecting hole (22-11). The connecting hole (22-11) is embedded in the positioning pin (21-2) to realize the connection between the strip-shaped protective sheet (22) and the molding positioning piece (21).

9. The sealing ring protection sheet for a trocar according to claim 6, characterized in that: The molded positioning piece (21) is made of a rigid medical material.

10. The sealing ring protection sheet for a trocar according to claim 6, characterized in that: The molding positioning member (21) is an annular structure, a funnel-shaped structure, or an elliptical structure.

11. A trocar, characterized in that: The puncture device (900) comprises the sealing ring protection sheet (2) for the puncture device according to claim 1.

12. The trocar according to claim 11, characterized in that: The piercer (900) comprises the end sealing assembly (20) according to claim 5.

13. The trocar according to claim 13, characterized in that: The puncture device (900) comprises a puncture rod (100) and a puncture sheath tube (200); the puncture sheath tube (200) comprises an end cover (201) and a sleeve assembly (202); the end sealing assembly (20) is embedded between an upper shell (201-1) and a lower shell (201-2) of the end cover (201).

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