Sealing cap with return structure

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a sealing cap with a return structure. The utility model provides a sealing cap with a return structure, which aims at providing a sealing cap capable of reducing the influence of air leakage caused by the fatigue of an elastic material in the prior art, and comprises a cap main body and a mounting ring connected to the cap main body, one end of the cap main body is provided with a sealing assembly capable of being opened or closed, and the other end of the cap main body is provided with a return structure. The sealing cap further comprises restoring structures which can exert restoring force for closing the sealing assembly on the sealing assembly after deformation, the restoring structures are symmetrically connected to the two sides of the sealing assembly, the restoring structures provide resilience force for the sealing assembly, the anti-deformation working pressure of the sealing assembly is reduced, the resilience efficiency is improved, and the use durability of the sealing cap is improved. And the guide rib capable of generating mechanical interaction with the return structure is also arranged, so that the probability that the sealing cap is punctured by an instrument and the sealing cap is broken by stress is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a sealing cap with a recovery structure used for a puncture device. Background Art

[0002] In laparoscopic surgery, it is often used in conjunction with a trocar. The introduction of instruments and tools into the abdominal cavity and the formation of pressure in the abdominal cavity are mainly completed by the sealing cap. The sealing cap is connected to the trocar sleeve and is used to maintain pneumoperitoneum during the operation of the abdominal surgical instrument. The sealing cap is generally made of silicone material for resettable deformation. With the frequent entry and exit of surgical instruments, the silicone material is prone to fatigue, which causes the rebound to fail to be in place and causes air leakage.

[0003] For example, a Chinese invention patent discloses a disposable puncture device [application number: CN201010193536.1]. The invention includes a puncture sleeve, an air-blocking sealing ring, a puncture device body, an air injection valve, a self-adjusting sealing cap, an air-blocking sealing sheet, a locking fixed cover, an elastic sealing cap, an upper fixed ring, a lower fixed ring, a flat sealing sheet, a pressing ring, a puncture positioning guide cover, a puncture cone and a puncture positioning cover; wherein the self-adjusting sealing cap is a straight cap structure, which is pressed and positioned and installed by cooperating with the positioning boss on the puncture device body through the positioning groove.

[0004] Although the invention adopts multiple sealing devices such as air-blocking sealing rings, air-blocking sealing sheets, elastic sealing caps, flat sheet sealing rings, etc. to ensure the sealing effect, the sealing device on the puncture device sleeve still adopts conventional means, and is pressed and positioned and installed through the positioning groove and the positioning boss on the puncture device body. The silicone material will produce fatigue during use, so there is still a problem of easy rebound and leakage. Summary of the invention

[0005] The purpose of the utility model is to provide a sealing cap with a recovery structure in view of the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sealing cap with a restoring structure comprises a cap body and a mounting ring connected to the cap body, one end of the cap body is provided with a sealing component that can be opened or closed, and also comprises a restoring structure that can apply a restoring force to the sealing component to close the sealing component after deformation, and the restoring structure is symmetrically connected on both sides of the sealing component.

[0008] A sealing cap with a restoring structure as described above, preferably, the restoring structure includes a restoring base, one end of which is connected to the side of the sealing component, and the other end of the restoring base can be pressed against the inner wall of the puncture device sleeve sleeved on the outside of the sealing component by moving the restoring base, and the restoring effect of the sealing component is produced by giving a reaction force to the restoring base by squeezing the inner wall.

[0009] Preferably, the reset base as described above can specifically adopt the following structure: one end of it is an arc surface, and the other end is an elastic sheet structure with an outwardly protruding inclined surface. The outwardly protruding inclined surface fits on the inner wall of the puncture tube and is squeezed to provide a certain restoring force after being assembled to the puncture tube.

[0010] As another optional method, the reset base as described above can also adopt a reset protrusion structure, the length direction of the reset protrusion is perpendicular to the opening direction of the sealing assembly, one end of the reset protrusion is fixedly connected to the lower edge of the outer side of the sealing assembly, and the other end abuts against the inner wall of the puncture device sleeve.

[0011] As another optional manner, the reset base may also be a plurality of reset springs with mutually parallel axis lines, one end of the reset spring is fixedly connected to the outside of the sealing component, and the other end is pressed onto the inner wall of the puncture device sleeve.

[0012] As described above, the sealing cap with a restoring structure, the reset base also includes a protective guide structure arranged on the sealing component and protruding from the inner surface of the sealing component, which is used to guide the position and direction of the instrument during insertion to reduce the risk of puncturing the sealing component.

[0013] In a sealing cap with a restoring structure as described above, the protective guide structure includes at least two symmetrically arranged guide ribs, and the contact surface of the guide ribs with the sealing assembly in the opening direction of the sealing assembly is completely covered by the reset base when the sealing assembly is in an open state, that is, the reset base can completely withstand the squeezing force of the guide ribs on the sealing assembly, thereby increasing the structural stability and preventing the sealing assembly from being ruptured due to uneven force after the guide ribs act on the sealing assembly.

[0014] A sealing cap with a restoring structure as described above, wherein the sealing assembly includes at least two symmetrical sealing surfaces and sealing skirts connected thereto, wherein the guide rib is in the shape of a raised arc disc structure with a certain thickness, and the guide rib side surfaces on both sides of the protrusion are perpendicular to the inner surface of the sealing surface.

[0015] In the sealing cap with a restoring structure as described above, the closest horizontal straight line distance between the protruding parts of the symmetrical guide ribs is smaller than the width of the sealing strip formed by the sealing skirt, ensuring that the instrument can contact the guide ribs in advance when inserted.

[0016] In order to improve the overall strength, the mounting ring, cap body, sealing assembly, restoring structure and guide ribs are integrally formed of elastic material.

[0017] Compared with the existing technology, the advantages of the utility model are:

[0018] 1. The sealing cap provided by the utility model adopts a recovery structure to provide the sealing component with a rebound force, thereby reducing the anti-deformation working pressure of the sealing component, improving the rebound efficiency, and increasing the durability of the sealing cap.

[0019] The sealing cap provided by the utility model is provided with a guide structure, and the restoring structure can withstand the extrusion of the guide structure, thereby reducing the probability of the sealing cap being punctured by an instrument and the sealing cap being broken by stress.

[0020] The sealing cap provided by the utility model adopts an integrated molding manufacturing process, which improves the overall strength and reduces the risk of breakage during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0023] Figure 3 It is a structural schematic diagram of another perspective of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the utility model in the installed state;

[0025] In the figure: mounting ring 1, cap body 2, sealing assembly 3, sealing curved surface 31, inner surface 31a, sealing skirt 32, recovery structure 4, protective guide structure 5, guide rib 51, reset base 41, elastic sheet structure 411, guide rib side 511, puncture device sleeve a. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Embodiment 1: The utility model is a sealing cap installed in a trocar sleeve, combined with Figure 1 As shown, the cap body is mainly composed of a cap body 2 and a mounting ring 1 connected to the cap body 2. A sealing assembly 3 that can be opened or closed is provided at one end of the cap body 2, and a recovery structure 4 is connected to the sealing assembly 3 in a bilaterally symmetrical manner.

[0028] As a preferred embodiment, the restoring structure 4 includes a reset base 41, one end of which is connected to the side of the sealing component 3. The opening and closing of the sealing component 3 causes the reset base 41 to be displaced and squeezed so that the other end of the reset base 41 is pressed against the inner wall of the puncture sleeve a which is sleeved on the outside of the sealing component 3.

[0029] During use, the utility model inserts the instrument into the sealing cap through the top of the puncture sleeve, the sealing cap is squeezed, the sealing assembly 3 is opened to the surroundings and wraps the instrument, the sealing assembly 3 is opened to squeeze the reset base 41 connected thereto, the reset base 41 is deformed after being squeezed and acts on the inner wall of the puncture sleeve a, the inner wall of the puncture sleeve a provides a reaction force as a rebound force which is transmitted to the sealing assembly 3 through the reset base 41, plays an auxiliary sealing role when the instrument is working, and reduces the working pressure of the sealing assembly 3; when the instrument is pulled out, the rebound force helps the sealing assembly 3 to rebound into place.

[0030] As a preferred method for facilitating production, Figure 1 and 3 As shown, the reset base 41 includes an elastic sheet structure 411 with an arc surface at one end and an inclined slope at the other end. The raised slope is squeezed and fitted on the inner wall of the puncture tube a after assembly. The reset base 41 interacts mechanically with the sealing component 3 through the arc surface and interacts mechanically with the inner wall of the puncture tube a through the raised slope.

[0031] In order to reduce the risk of instruments puncturing the sealing cap, the sealing component 3 is further provided with a protective guide structure 5 protruding from the inner surface of the sealing component 3 .

[0032] like Figure 2 , 4 As shown, the protective guide structure 5 includes at least two symmetrically arranged guide ribs 51, and the contact surface of the guide rib 51 with the sealing component 3 during the opening process of the sealing component 3 is completely covered by the reset base 41 in the opening direction of the sealing component 3, that is, it is ensured that the reset base can fully withstand the squeezing force of the guide rib 51 on the sealing component 3, increase the structural stability, and prevent the sealing component 3 from being broken due to uneven force after the guide rib 51 acts on the sealing component 3.

[0033] As a common trocar sealing cap structure, the sealing assembly 3 includes at least two symmetrical sealing curved surfaces 31 and corresponding bottom sealing skirts 32 connected thereto. The sealing curved surfaces 31 drive the bottom sealing skirt 32 to move away from or closer to achieve the opening and closing of the bottom.

[0034] As a preferred solution, the guide rib 51 is shaped as a raised arc disc structure with a certain thickness, and the side surfaces 511 on both sides of the raised structure are perpendicular to the inner surface 31 a of the sealing curved surface 31 .

[0035] The closest horizontal straight-line distance between the protruding parts of each symmetrical guide rib 51 is smaller than the width of the sealing strip formed by the sealing skirt 32, ensuring that when the instrument is inserted toward the bottom, it can contact the reinforcing ribs to produce a guiding effect before the sealing component 3, thereby reducing the risk of the side of the sealing component 3 being punctured.

[0036] In order to further increase the strength of the sealing cap, the sealing cap structure can be integrally formed using elastic materials such as silicone.

[0037] Embodiment 2: The same parts as Embodiment 1 are not described again. As another common implementation, the reset base 41 may include a reset protrusion, the length direction of which is perpendicular to the opening direction of the sealing component 3, one end of which is fixedly connected to the lower edge of the outer side of the sealing component 3, and the other end of which is against the inner wall of the puncture sleeve a. When the sealing component 3 is opened, the protrusion is squeezed, and the protrusion is transmitted to the inner wall of the puncture sleeve a, thereby receiving a reaction force and transmitting it to the sealing component 3 to generate a rebound force.

[0038] Embodiment 3: The same parts as Embodiment 1 are not described again. As an easily conceivable method, the reset base 41 can also adopt a plurality of reset springs with mutually parallel axis lines, one end of which is fixedly connected to the outside of the sealing component 3, and the other end is pressed on the inner wall of the puncture device sleeve a, and the sealing component 3 is opened to squeeze the spring to generate a rebound force.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although the present invention uses more terms such as mounting ring 1, cap body 2, sealing assembly 3, sealing curved surface 31, inner surface 31a, sealing skirt 32, recovery structure 4, protective guide structure 5, guide rib 51, reset base 41, elastic sheet structure 411, guide rib side 511, trocar sleeve a, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A sealing cap with a recovery structure, comprising a cap body (2) and a mounting ring (1) connected to the cap body (2), wherein one end of the cap body (2) is provided with a sealing component (3) that can be opened or closed, and characterized in that: It also comprises a restoring structure (4) which can exert a restoring force on the sealing component (3) to close the sealing component (3) after deformation, and the restoring structure (4) is symmetrically connected to two sides of the sealing component (3).

2. A sealing cap with a recovery structure as claimed in claim 1, characterized in that: The restoring structure (4) comprises a reset base (41), one end of which is connected to the side of the sealing component (3), and the other end of the reset base (41) can be pressed against the inner wall of the puncture device sleeve (a) sleeved on the outside of the sealing component (3) by moving the reset base (41).

3. A sealing cap with a recovery structure as claimed in claim 2, characterized in that: The resetting base (41) comprises an elastic sheet structure (411) having an arc surface at one end and an outwardly protruding inclined surface at the other end, wherein the outwardly protruding inclined surface is pressed and fitted on the inner wall of the trocar sleeve (a).

4. A sealing cap with a recovery structure as claimed in claim 2, characterized in that: The reset base (41) comprises a reset protrusion, the length direction of which is perpendicular to the opening direction of the sealing assembly (3), one end of which is fixedly connected to the lower edge of the outer side of the sealing assembly (3), and the other end of which abuts against the inner wall of the puncture device sleeve (a).

5. The sealing cap with a recovery structure as claimed in claim 2, characterized in that: The reset base (41) comprises a plurality of reset springs whose axes are parallel to each other, one end of the reset spring is fixedly connected to the outside of the sealing component (3), and the other end is pressed onto the inner wall of the trocar sleeve (a).

6. The sealing cap with a recovery structure as claimed in claim 1, characterized in that: It also includes a protective guide structure (5) which is arranged on the sealing component (3) and protrudes from the inner surface of the sealing component (3).

7. A sealing cap with a recovery structure as claimed in claim 6, characterized in that: The protective guide structure (5) comprises at least two symmetrically arranged guide ribs (51); the projection of the contact surface of the guide rib (51) with the sealing component (3) in the opening direction of the sealing component (3) is completely covered by the reset base (41) during the opening process of the sealing component (3).

8. A sealing cap with a recovery structure as claimed in claim 7, characterized in that: The sealing assembly (3) comprises at least two symmetrical sealing curved surfaces (31) and corresponding bottom sealing skirts (32) connected thereto, the sealing curved surfaces (31) driving the bottom sealing skirt (32) to move to achieve opening and closing of the bottom, the guide rib (51) being in the shape of a raised circular arc disc structure having a certain thickness, and the side surfaces (511) on both sides of the raised surface are perpendicular to the inner surface (31a) of the sealing curved surface (31).

9. The sealing cap with a recovery structure as claimed in claim 7, characterized in that: The closest horizontal straight line distance of the protruding portion of the guide rib (51) is smaller than the width of the sealing strip formed by the sealing skirt (32).

10. The sealing cap with a recovery structure as claimed in claim 6, characterized in that: The mounting ring (1), the cap body (2), the sealing assembly (3), the return structure (4), and the guide structure (5) are integrally formed.

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