Sealing assembly of laparoscope puncture outfit

Abstract

The utility model is applicable to the technical field of medical instruments, and provides a sealing assembly of a laparoscope puncture outfit, which comprises a cylindrical shell, a puncture inlet is arranged at the top of the cylindrical shell, a limit seat is arranged in the cylindrical shell, the limit seat comprises a short tube section, an upper positioning ring and a lower positioning ring, and the upper positioning ring and the lower positioning ring are arranged on the inner wall of the short tube section. Positioning rings are arranged in the cylindrical shell, the annular hollow air bag is arranged between the positioning rings, the diameter of a central inner ring of the annular hollow air bag is smaller than that of a puncture needle, a round rubber mat is further arranged above the limiting seat, a plurality of wire grooves are radially formed in the center of the round rubber mat, and a fixing ring used for pressing the limiting seat is further arranged in the cylindrical shell. The air bag has a certain thickness, the central inner ring of the air bag is in surface contact with the puncture needle, the contact area can be increased, and the sealing effect is improved. In addition, the annular hollow air bag is designed to be of a detachable structure, is installed upwards from the bottom and is locked through the fixing ring, and installation is stable and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a sealing component of a laparoscopic puncture device. Background Art

[0002] Laparoscopic surgery is a minimally invasive procedure that involves making a small incision in the abdomen and inserting a laparoscopic puncture device to introduce a camera and surgical instruments into the abdominal cavity. The laparoscopic puncture device usually consists of a cannula and a retractable puncture needle, which are used to puncture the abdominal wall and enter the abdominal cavity.

[0003] The side wall of the cannula has a negative pressure port, and the top of the cannula is kept as sealed as possible when the puncture needle is inserted. Therefore, in the current structure, there is a detachable sealing component on the top of the cannula. During use, the puncture needle passes through the sealing component and the cannula until the puncture needle penetrates the abdominal cavity. The core component of the current puncture device's sealing component is a rubber pad with a cross-shaped wire groove in the center, forming four rubber flaps. When the puncture needle is inserted into the center of the rubber pad, the rubber flaps deform downward. Since the main body of the puncture needle is tubular, there is still a significant gap between the rubber flaps, and the sealing effect is poor. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a sealing assembly of a laparoscopic puncture device, aiming to solve the above technical problems.

[0005] The utility model adopts the following technical solutions:

[0006] The sealing assembly of the laparoscopic puncture device includes a cylindrical shell, the top of the cylindrical shell is a puncture entrance, a limit seat is arranged in the cylindrical shell, the limit seat includes a short tube section, two upper and lower positioning rings arranged on the inner wall of the short tube section, and an annular hollow airbag arranged between the positioning rings, the central inner ring diameter of the annular hollow airbag is smaller than the diameter of the puncture needle, a circular rubber pad is also arranged above the limit seat, and multiple wire grooves are radiated from the center position of the circular rubber pad, and a fixing ring for pressing the limit seat is also provided in the cylindrical shell.

[0007] Furthermore, an upper ring is provided above the limiting seat in the cylindrical shell, and a pressure ring with an L-shaped cross section is provided between the limiting seat and the upper ring, and the bottom of the pressure ring tightly presses the circular rubber pad.

[0008] Furthermore, the inner ring of the tail of the cylindrical shell is a threaded section, and the fixing ring is screwed into the threaded section and pressed against the bottom of the limiting seat.

[0009] Furthermore, the bottom of the fixing ring has a circle of ribs.

[0010] Furthermore, there are several operating blocks at the bottom of the fixing ring.

[0011] The beneficial effects of the present invention are as follows: First, the present structure is provided with a two-layer sealing structure comprising a rubber pad and an annular hollow airbag. The annular hollow airbag has a certain thickness. When the puncture needle first passes through the rubber pad and then through the annular hollow airbag, the airbag deforms, and the central inner ring of the airbag and the puncture needle form a circular surface contact, thereby increasing the contact area and improving the sealing effect. Moreover, the upper rubber pad has more wire grooves, and after the puncture needle is inserted, the gap between adjacent wire grooves is also smaller. Secondly, the present structure designs the annular hollow airbag as a detachable structure, which is installed from the bottom up and locked with a fixing ring, making installation more stable and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The three-dimensional sealing assembly provided by the embodiment of the utility model Figure 1 ;

[0013] Figure 2 The three-dimensional sealing assembly provided by the embodiment of the utility model Figure 2 ;

[0014] Figure 3 This is a cross-sectional view of the sealing assembly provided by the embodiment of the utility model Figure 1 ;

[0015] Figure 4 This is a cross-sectional view of the sealing assembly provided by the embodiment of the utility model Figure 2 . DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0018] like Figure 1-4 As shown, the sealing assembly of the laparoscopic puncture device provided in this embodiment includes a cylindrical shell 1, the top of the cylindrical shell 1 is a puncture entrance 11, and a limit seat 2 is arranged in the cylindrical shell 1. The limit seat 2 includes a short tube section 21, two upper and lower positioning rings 22 arranged on the inner wall of the short tube section 21, and an annular hollow airbag 23 arranged between the positioning rings 22. The central inner ring diameter of the annular hollow airbag 23 is smaller than the diameter of the puncture needle. A circular rubber pad 3 is also provided above the limit seat 2, and a plurality of wire grooves 31 are radiated from the center position of the circular rubber pad 3. A fixing ring 4 for pressing the limit seat 2 is also provided in the cylindrical shell 1.

[0019] This sealing assembly is installed on the top of the sheath of the laparoscopic trocar. The sealing assembly contains two layers: a rubber pad and an annular hollow balloon. When the puncture needle is not inserted, the rubber pad is closed, providing a certain sealing effect. When the puncture needle is inserted, the needle enters the rubber pad first. Because the upper rubber pad has more grooves than the cross-shaped rubber pad, the gaps between adjacent grooves are smaller after the puncture needle is inserted, resulting in a better sealing effect. As the puncture needle continues to penetrate the annular hollow balloon, the center and outer periphery of the annular hollow balloon expand and deform. Because the annular hollow balloon has a certain thickness, after deformation, the center of the annular hollow balloon and the puncture needle form a circular surface contact, rather than a linear contact. This increases the contact area of ​​the seal and improves the sealing effect. Furthermore, because the annular hollow balloon is a full ring, even if there is slight internal wobbling during insertion of the puncture needle, the annular hollow balloon can adapt to the deformation without affecting the sealing effect.

[0020] As a mounting method, an upper ring 12 is positioned within the cylindrical housing 1, above the stop seat 2. A pressure ring 5 with an L-shaped cross-section is positioned between the stop seat 2 and the upper ring 12. The bottom of the pressure ring 5 tightly presses against the circular rubber pad 3. The top of the L-shaped pressure ring 5 contacts the upper ring 12, and its shape matches the top of the stop seat 2. The inner ring at the rear of the cylindrical housing 1 is threaded, into which the retaining ring 4 is screwed, pressing against the bottom of the stop seat 2. After the retaining ring is screwed in from the bottom, it presses the stop seat upward, thereby securing the stop seat and the rubber pad.

[0021] And the bottom of described fixing ring 4 also has several operating blocks 42. By manually operating a pair of operating blocks, it is easier to rotate fixing ring and complete fixing.

[0022] In addition, the bottom of the fixing ring 4 is further provided with a circle of ribs 41. The function of the ribs is to press the rubber ring at the pipe opening in the pipe sleeve tightly when the sealing assembly is installed in the pipe sleeve.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing assembly of a laparoscopic puncture device, characterized in that: The invention comprises a cylindrical shell (1), the top of the cylindrical shell (1) being a puncture entrance (11), a limiting seat (2) being arranged in the cylindrical shell (1), the limiting seat (2) comprising a short tube section (21), two upper and lower positioning rings (22) arranged on the inner wall of the short tube section (21), and an annular hollow air bag (23) arranged between the positioning rings (22), the central inner ring diameter of the annular hollow air bag (23) being smaller than the diameter of the puncture needle, a circular rubber pad (3) being arranged above the limiting seat (2), a plurality of line grooves (31) being radially opened at the center position of the circular rubber pad (3), and a fixing ring (4) for pressing the limiting seat (2) being also arranged in the cylindrical shell (1).

2. The sealing assembly of the laparoscopic puncture device according to claim 1, characterized in that: An upper ring (12) is located above the limiting seat (2) in the cylindrical shell (1), and a pressure ring (5) with an L-shaped cross section is located between the limiting seat (2) and the upper ring (12). The bottom of the pressure ring (5) tightly presses the circular rubber pad (3).

3. The sealing assembly of the laparoscopic puncture device according to claim 2, characterized in that: The inner ring at the tail of the cylindrical housing (1) is a threaded section, and the fixing ring (4) is screwed into the threaded section and pressed against the bottom of the limiting seat (2).

4. The sealing assembly of the laparoscopic puncture device according to claim 3, characterized in that: The bottom of the fixing ring (4) is further provided with a circle of convex ribs (41).

5. The sealing assembly of the laparoscopic puncture device according to claim 4, characterized in that: The bottom of the fixing ring (4) is also provided with a plurality of operating blocks (42).

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