Sealing device and abdominal cavity puncture outfit
By designing a sealing device including a shell, an elastomer and a film body, the problems of sealing instability and gas leakage in the prior art are solved, and efficient sealing and stable operation are achieved, which is suitable for abdominal puncture devices.
Patent Information
- Application Number
- CN202311398951.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-26
- Publication Date
- 2025-04-29
AI Technical Summary
When the sealing device of existing abdominal puncture devices is inserted and removed by medical devices of different diameters, the insertion and removal force is unstable, and the four interlaced gaskets cannot be completely sealed, resulting in gas leakage.
A sealing device including a shell, an elastomer and a film body is designed. The shell is a cylindrical structure, the elastic body is columnar and has a central channel. The film body passes through the channel and is fixed at the upper and lower ends of the shell. The film body is squeezed into a sealed state by the elastic body when there is no rod. After the rod is passed, the rod is sealed and joined to its outer surface.
It realizes efficient sealing of the sealing device, stable operating pressure, avoids gas leakage, and is suitable for inserting and unplugging medical devices of different diameters, improving the stability of surgical operations.
Smart Images
Figure CN119896519A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure relate to the technical field of medical devices, and in particular to a sealing device and an abdominal puncture device. Background Art
[0002] Abdominal puncture devices are used in minimally invasive medical surgeries. In the prior art, the sealing gasket of the sealing device of the puncture device is composed of a single gasket or four identical thin rubber gaskets stacked in an interlaced manner. When a single gasket is used, since the diameter of its central hole is a fixed size, when medical devices of different diameters pass through this gasket, the insertion and extraction forces are different. When inserting a medical device with a large diameter, the insertion and extraction force is too large. When inserting a medical device with a small diameter, the insertion and extraction force is too small. This will affect the surgeon's operation. When a seal formed by stacking four identical gaskets in an interlaced manner is used, since the structure cannot be completely sealed at the overlapping part, some gas leakage will occur. Summary of the invention
[0003] The present disclosure is proposed to alleviate or solve at least one aspect or at least one point of the above problems.
[0004] According to one aspect of an embodiment of the present disclosure, a sealing device is provided, comprising:
[0005] A shell, the shell being a cylindrical structure and defining a cylindrical inner wall;
[0006] An elastic body is disposed in a space defined by the cylindrical inner wall of the housing, the elastic body is columnar and has a passage therein that passes through the center line of the column; and
[0007] a thin film body, the thin film body comprising a film body cylindrical portion passing through the channel, the upper end of the thin film body being fixed to the upper end of the shell, and the lower end of the thin film body being fixed to the lower end of the shell,
[0008] in:
[0009] The membrane cylindrical part of the thin film body allows a rod to pass through. When no rod passes through, the membrane cylindrical part is suitable for being squeezed by the elastomer and in a closed sealing state. When a rod passes through, the membrane cylindrical part is squeezed by the elastomer and is suitable for sealing and engaging the outer surface of the rod.
[0010] According to another aspect of the embodiments of the present disclosure, a abdominal puncture device is provided, comprising: a housing; and the aforementioned sealing device, wherein the sealing device is suitable for being fixed in the housing.
[0011] The sealing device disclosed in the present invention has the characteristics of reliable sealing, stable operating pressure and simple structural design. It is applied in the abdominal puncture device to facilitate stable operation of medical personnel during surgery. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic perspective view of a sealing device according to an exemplary embodiment of the present disclosure;
[0013] Figure 2 is a schematic exploded view of a sealing device according to an exemplary embodiment of the present disclosure;
[0014] Figure 3 is a schematic cross-sectional view of a sealing device according to an exemplary embodiment of the present disclosure, wherein the sealing device is installed in a cannula of a abdominal puncture device;
[0015] Figure 4 It is a schematic cross-sectional view of the cooperation between the sealing device and the sleeve according to an exemplary embodiment of the present disclosure, and the elastic body is removed for the convenience of showing the structure;
[0016] Figure 5 FIG. 4 is a schematic exploded view of a abdominal puncture device according to an exemplary embodiment of the present disclosure.
[0017] In the figure:
[0018] 1. Shell; 1A, upper positioning hole; 1B, lower positioning hole;
[0019] 2. Elastomer;
[0020] 3. Thin film body; 3A. Cylindrical portion of the film body; 3B. Laterally extending upper portion; 3C. Laterally extending lower portion;
[0021] 4. Upper cover; 4A. Upper positioning column;
[0022] 5. Lower cover; 5A. Lower positioning column;
[0023] 6. Casing;
[0024] 7. Sealing ring. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present disclosure.
[0026] The embodiment of the present disclosure provides a sealing device, such as Figure 1-5 As shown, the sealing device comprises a housing 1 , an elastic body 2 and a film body 3 .
[0027] like Figure 2 and Figure 3As shown, the shell 1 is a cylindrical structure, which is defined by a cylindrical inner wall, and the elastomer 2 is arranged in the space defined by the cylindrical inner wall of the shell 1, and the elastomer 2 is cylindrical and has a channel running through the center line of the cylinder. Although the channel here is not explicitly shown, as can be understood, it can be a slit structure passing through the elastomer 2, and the slit structure is sealed based on the elasticity of the elastomer 2 (when the elastomer is squeezed by the cylindrical inner wall of the shell 1). In the present disclosure, as mentioned later, for example, when the outer peripheral surface of the elastomer is circular in cross section, the center line of the cylinder is the center axis of the cylinder, and for another example, when the outer peripheral surface of the elastomer is a regular polygon in cross section, the center line of the cylinder is the center axis of the regular prism.
[0028] In the present disclosure, the cross-sectional shape of the cylindrical inner wall of the housing 1 and the cross-sectional shape of the outer peripheral surface of the elastic body 2 are configured so that the elastic body 2 in the housing 1 is substantially uniformly pressed radially inward in the circumferential direction by the cylindrical inner wall.
[0029] In a further embodiment, the cross-sectional shape of the cylindrical inner wall of the housing 1 is the same as or similar to the cross-sectional shape of the outer peripheral surface of the elastic body 2 .
[0030] In a further embodiment, the cross-sectional shape of the cylindrical inner wall of the shell 1 and the cross-sectional shape of the outer peripheral surface of the elastomer 2 are circular or regular polygons (such as regular hexagons, regular octagons, etc.); or the cross-sectional shape of the cylindrical inner wall of the shell 1 is circular, and the cross-sectional shape of the outer peripheral surface of the elastomer 2 is a regular polygon (such as regular hexagons, regular octagons, etc.).
[0031] like Figure 3 As shown, the film body 3 includes a film body cylindrical portion 3A passing through the channel. Figure 2 and Figure 3 In the figure, the membrane cylindrical portion 3A appears to have a larger diameter, but Figure 2 and Figure 3 Only the wrinkles formed when the film 3 is in the slit structure because the elastomer 2 is also squeezed are shown. In practice, even if there are so many wrinkles, the film cylindrical portion 3A is squeezed in the circumferential direction and in the radially inward direction so that the channel of the film cylindrical portion 3A is squeezed and closed. More specifically, the film cylindrical portion 3A allows a rod-shaped object (not shown) to pass through. When no rod-shaped object passes through, the film cylindrical portion 3A is suitable for being squeezed by the elastomer 2 and being in a closed sealing state. When a rod-shaped object passes through, the film cylindrical portion 3A is squeezed by the elastomer and is suitable for sealing and engaging the outer surface of the rod-shaped object.
[0032] In the present disclosure, the length of the membrane cylindrical portion may be short or long, depending on the shape of the inner edge of the channel of the elastic body.
[0033] like Figure 2 and Figure 3As shown, the upper end of the film body 3 is fixed to the upper end of the shell 1, and the lower end of the film body 3 is fixed to the lower end of the shell 1. The upper and lower ends of the film body 3 are fixed, so that the position of the film body relative to the elastic body 2 is fixed, and in the case where a rod-shaped object passes through the film body cylindrical portion 3A later, the film body 3 will not be separated from the channel of the elastic body 2. In the present disclosure, the fixing method that can fix the position of the film body cylindrical portion 3A of the film body 3 relative to the position of the elastic body 2 is within the protection scope of the present disclosure.
[0034] In this disclosure, upper end means that a component is closer to Figure 5 The lower end indicates that a component is closer to the upper cover 4. Figure 5 The lower left end of the trocar.
[0035] In an optional embodiment, if Figure 3 As shown, the upper end of the film body 3 covers the upper end of the elastic body 2 and is fixed to the upper end of the housing 1 , and the lower end of the film body 3 covers the lower end of the elastic body 2 and is fixed to the lower end of the housing 1 .
[0036] In an optional embodiment, if Figure 2 As shown, the upper end of the film body 3 is provided with an annular laterally extending upper portion 3B, and the lower end of the film body 3 is provided with an annular laterally extending lower portion 3C. The laterally extending upper portion 3B of the film body 3 is fixed to the upper end of the shell 1, and the laterally extending lower portion 3C of the film body 3 is fixed to the lower end of the shell 1.
[0037] In an optional embodiment, the laterally extending upper portion 3B of the film body 3 covers the upper end of the elastomer 2, and the laterally extending upper portion 3B of the film body 3 is fixed to the upper end of the shell 1, and the laterally extending lower portion 3C of the film body 3 covers the lower end of the elastomer 2, and the laterally extending lower portion 3C of the film body 3 is fixed to the lower end of the shell 1.
[0038] like Figures 1 to 5 As shown, the sealing device is also provided with an annular upper cover 4 and an annular lower cover 5, both of which are hollow rings, wherein the upper cover 4 covers the upper end of the shell 1 to fix the upper end of the film body 3 to the upper end of the shell 1, and the lower cover 5 covers the lower end of the shell 1 to fix the lower end of the film body 3 to the lower end of the shell 1.
[0039] In an optional embodiment, the sealing device is only provided with an annular upper cover 4 , the upper end of the film body 3 is provided with an annular laterally extending upper portion 3B, and the laterally extending upper portion 3B of the film body 3 is fixed to the upper end of the housing 1 via the upper cover 4 .
[0040] In an optional embodiment, the sealing device is only provided with an annular lower cover 5 , and the lower end of the film body 3 is provided with an annular laterally extending lower portion 3C, and the laterally extending lower portion 3C of the film body 3 is fixed to the lower end of the housing 1 via the lower cover 5 .
[0041] In the present disclosure, the film body 3 may be elastic or inelastic, both of which are within the protection scope of the present disclosure.
[0042] The fixed connection between the upper cover or the lower cover and the housing 1 is described below by way of example.
[0043] In an optional embodiment, when both the annular upper cover 4 and the annular lower cover 5 are provided, at least one upper positioning hole 1A extending along the axial direction of the housing 1 is provided in the wall portion of the housing 1 at the upper end of the housing 1 (see Figure 2 and Figure 3 ), at least one lower positioning hole 1B extending along the axial direction of the housing 1 is provided in the wall of the housing 1 at the lower end of the housing 1 (see Figure 3 ); Accordingly, the upper cover 4 is provided with at least one upper positioning column 4A on the side facing the housing 1 (see Figure 2 and Figure 3 ), the upper positioning column 4A is fixed in the corresponding upper positioning hole 1A; the lower cover 5 is provided with at least one lower positioning column 5A on the side facing the housing 1 (see Figure 2 and Figure 3 ), the lower positioning column 5A is fixed in the corresponding lower positioning hole 1B.
[0044] In an optional embodiment, the upper positioning hole 1A includes a plurality of upper positioning holes 1A spaced apart in the circumferential direction; the upper positioning post 4A includes a plurality of upper positioning posts 4A adapted to be respectively fixed in the corresponding upper positioning holes; the lower positioning hole 1B includes a plurality of lower positioning holes 1B spaced apart in the circumferential direction; and the lower positioning post 5A includes a plurality of lower positioning posts 5A adapted to be respectively fixed in the corresponding lower positioning holes 1B.
[0045] For example, Figure 2 and Figure 3 As shown, the upper cover 4 is provided with four upper positioning columns 4A spaced apart in the circumferential direction, and the lower cover 5 is provided with four positioning columns 5A spaced apart in the circumferential direction. Accordingly, four upper positioning holes 1A extending along the axial direction of the shell are provided at the upper end of the shell in the wall portion of the shell, and four lower positioning holes 1B extending along the axial direction of the shell are provided at the lower end of the shell in the wall portion of the shell. The four upper positioning columns 4A are fixed in the corresponding four upper positioning holes 1A, and the four lower positioning columns 5A are fixed in the corresponding four lower positioning holes 1B.
[0046] In an optional embodiment, the positioning column is fixed in the corresponding positioning hole by interference fit.
[0047] In an optional embodiment, the upper positioning hole 1A and the corresponding lower positioning hole 1B are connected to each other in the axial direction of the housing 1, such as Figure 3The upper positioning hole 1A and the corresponding lower positioning hole 1B may not penetrate each other in the axial direction of the housing 1, or the two may not be aligned in the axial direction, which are all within the protection scope of the present disclosure.
[0048] In an optional embodiment, the upper end of the film body 3 is provided with an annular transversely extending upper portion, the transversely extending upper portion 3B of the film body 3 is fixed to the upper end of the housing 1 via the upper cover 4, and the upper positioning column 4A passes through the transversely extending upper portion 3B of the film body 3. The lower end of the film body 3 is provided with an annular transversely extending lower portion 3C, the transversely extending lower portion 3C of the film body 3 is fixed to the lower end of the housing 1 via the lower cover 5, and the lower positioning column 5A passes through the transversely extending lower portion 3C of the film body 3.
[0049] In an optional embodiment, the upper end of the film body 3 covers the upper end of the elastomer 2 and is fixed to the upper end of the shell 1, the lower end of the film body 3 covers the lower end of the elastomer 2 and is fixed to the lower end of the shell 1, the positioning column of the upper cover 4 passes through the upper end of the film body 3 covering the elastomer 2, and the positioning column of the lower cover 5 passes through the lower end of the film body 3 covering the elastomer 2.
[0050] In an optional embodiment, although not shown, an upper gasket is provided between the upper cover 4 and the upper end of the housing 1, and the upper gasket is used to fix or squeeze the upper end of the film body 3. A lower gasket is provided between the lower cover 5 and the lower end of the housing 1, and the lower gasket is used to fix or squeeze the lower end of the film body 3.
[0051] In an optional embodiment, the upper cover 4 or the lower cover 5 can be fixed to the housing 1 by means of screws or buckles.
[0052] In an optional embodiment, the end of the positioning column is configured as a pointed tip to help pierce the film body 3 and thus facilitate fixing the film body 3 on the housing 1 .
[0053] like Figure 3-Figure 5 As shown, the embodiment of the present disclosure also provides a abdominal puncture device, which includes the sealing device and the housing 6 described above, and of course other existing structures as shown in the figure. Figure 3 and Figure 4 As shown, the sealing device is fixed in the housing 6.
[0054] In an optional embodiment, the outer wall of the housing 1 of the sealing device is provided with a step, and a sealing ring 7 is sleeved on the step (see Figure 2 ), the housing 6 of the trocar may be provided with a sealing structure (not shown) for pressing against a sealing ring.
[0055] In an optional embodiment, the elastomer 2 is made of an elastic material, such as a silicone elastomer.
[0056] In an optional embodiment, the film body 3 is made of rubber or thermoplastic elastomer, such as thermoplastic polyurethane (TPU) or polyvinyl chloride (PVC).
[0057] The following is an exemplary description of the working principle of the present invention:
[0058] The sealing device includes a shell 1, an elastomer 2 and an elastic film body 3, wherein the film cylindrical portion of the film body 3 allows a rod-shaped object to pass through, and when no rod-shaped object passes through, the film cylindrical portion of the film body 3 is squeezed by the elastomer 2 and is in a closed sealing state, and when a rod-shaped object passes through, the film cylindrical portion of the film body 3 is squeezed by the elastomer 2 and seals the outer surface of the rod-shaped object.
[0059] The elastomer 2 in the sealing device is located in the shell 1. In the initial state, that is, when no rod-shaped object passes through, the elastomer 2 radially squeezes the membrane cylinder 3A of the film body 3 located therein, so that the membrane cylinder 3A of the film body 3 located in the channel of the elastomer 2 is squeezed and is in a closed sealing state.
[0060] When in use, the rod (surgical instrument) needs to pass through the sealing device of the trocar and then enter the patient's body. When the rod passes through the sealing device, the rod passes through the middle position of the film body 3 (i.e., the position defined by the film body cylinder 3A). At this time, the rod applies a certain pressure to the film body 3 in both the axial and radial directions, thereby squeezing the elastic body 2, so that the elastic body 2 is squeezed and deformed radially outward, so that the rod passes through the film body cylinder 3A of the film body 3 and enters the body. At this time, the film body cylinder 3A of the film body 3 is squeezed by the elastic body 2 to seal and engage the outer surface of the rod.
[0061] After the rod-shaped object passes through the sealing device, the elastic body 2 of the sealing device is deformed radially inward (toward the center), and at this time, an extruded film cylinder 3A is formed in the direction of the central axis to play a blocking role.
[0062] When the rod-shaped object is taken out from the trocar, the rod-shaped object passes through the middle channel of the thin film 3 or the film body cylinder 3A, and the rod-shaped object again applies pressure to the thin film 3 in the axial and radial directions, thereby squeezing the elastic body 2, so that the elastic body 2 is squeezed and deformed radially outward, so that the rod-shaped object passes through the film body cylinder 3A of the thin film 3 and is taken out from the body. In this process, the film body cylinder 3A of the thin film 3 is squeezed by the elastic body 2 to seal and engage the outer surface of the rod-shaped object.
[0063] After being taken out, the elastic body 2 releases the squeezing of the rod-shaped object, so that the elastic body 2 is deformed radially inward (center direction), and squeezes the membrane cylinder 3A of the thin film body 3, so that the central channel defined by the membrane cylinder 3A is in a closed state, and plays a sealing and blocking role at the entrance of the trocar. That is, when the rod-shaped object is taken out of the trocar, the sealing device can be quickly closed, thereby maintaining the air pressure in the patient's body and ensuring the smooth progress of the operation.
[0064] Based on the above, the present disclosure proposes the following technical solutions:
[0065] 1. A sealing device, comprising:
[0066] A shell, the shell being a cylindrical structure and defining a cylindrical inner wall;
[0067] An elastic body is disposed in a space defined by the cylindrical inner wall of the housing, the elastic body is columnar and has a passage therein that passes through the center line of the column; and
[0068] a thin film body, the thin film body comprising a film body cylindrical portion passing through the channel, the upper end of the thin film body being fixed to the upper end of the shell, and the lower end of the thin film body being fixed to the lower end of the shell,
[0069] in:
[0070] The membrane cylindrical part of the thin film body allows a rod to pass through. When no rod passes through, the membrane cylindrical part is suitable for being squeezed by the elastomer and in a closed sealing state. When a rod passes through, the membrane cylindrical part is squeezed by the elastomer and is suitable for sealing and engaging the outer surface of the rod.
[0071] 2. The sealing device according to item 1, wherein:
[0072] The upper end of the film body covers the upper end of the elastic body and is fixed to the upper end of the shell, and the lower end of the film body covers the lower end of the elastic body and is fixed to the lower end of the shell.
[0073] 3. The sealing device according to item 1, wherein:
[0074] The upper end of the film body is provided with an annular transversely extending upper portion, the lower end of the film body is provided with an annular transversely extending lower portion, the transversely extending upper portion of the film body is fixed to the upper end of the shell, and the transversely extending lower portion of the film body is fixed to the lower end of the shell.
[0075] 4. The sealing device according to claim 3, wherein:
[0076] The laterally extending upper portion of the film body covers the upper end of the elastic body and is fixed to the upper end of the shell, and the laterally extending lower portion of the film body covers the lower end of the elastic body and is fixed to the lower end of the shell.
[0077] 5. The sealing device according to any one of 1 to 4, further comprising:
[0078] An annular upper cover and / or an annular lower cover, wherein the upper cover covers the upper end of the shell to fix the upper end of the film body to the upper end of the shell, and the lower cover covers the lower end of the shell to fix the lower end of the film body to the lower end of the shell.
[0079] 6. The sealing device according to 5, wherein:
[0080] The sealing device is provided with an upper cover, the upper end of the film body is provided with an annular transversely extending upper portion, and the transversely extending upper portion of the film body is fixed to the upper end of the housing via the upper cover; and / or
[0081] The sealing device is provided with a lower cover, the lower end of the film body is provided with an annular laterally extending lower portion, and the laterally extending lower portion of the film body is fixed to the lower end of the shell via the lower cover.
[0082] 7. The sealing device according to 5, wherein:
[0083] The sealing device is provided with an upper cover, and at least one upper positioning hole extending along the axial direction of the shell is provided in the wall portion of the shell at the upper end of the shell, and the upper cover is provided with at least one upper positioning column on the side facing the shell, and the upper positioning column is suitable for being fixed in the corresponding upper positioning hole; and / or
[0084] The sealing device is provided with a lower cover, and at least one lower positioning hole extending along the axial direction of the shell is provided in the wall portion of the shell at the lower end of the shell, and the lower cover is respectively provided with at least one lower positioning column on the side facing the shell, and the lower positioning column is suitable for being fixed in the corresponding lower positioning hole.
[0085] 8. The sealing device according to item 7, wherein:
[0086] The positioning column is suitable for being fixed in the corresponding positioning hole in an interference fit manner.
[0087] 9. The sealing device according to item 7, wherein:
[0088] The sealing device is provided with an upper cover, the upper end of the film body is provided with an annular transversely extending upper portion, the transversely extending upper portion of the film body is fixed to the upper end of the shell via the upper cover, and the upper positioning post passes through the transversely extending upper portion of the film body, and / or the sealing device is provided with a lower cover, the lower end of the film body is provided with an annular transversely extending lower portion, the transversely extending lower portion of the film body is fixed to the lower end of the shell via the lower cover, and the lower positioning post passes through the transversely extending lower portion of the film body; or
[0089] The sealing device is provided with an upper cover and a lower cover, the upper end of the film body covers the upper end of the elastomer and is fixed to the upper end of the shell, the lower end of the film body covers the lower end of the elastomer and is fixed to the lower end of the shell, the positioning column of the upper cover passes through the upper end of the film body covering the elastomer, and the positioning column of the lower cover passes through the lower end of the film body covering the elastomer.
[0090] 10. The sealing device according to item 7, wherein:
[0091] At least one of the positioning posts is provided with a pointed end or a narrowed end at its end.
[0092] 11. The sealing device according to item 7, wherein:
[0093] The sealing device is provided with an upper cover and a lower cover, and the upper positioning hole and the corresponding lower positioning hole are connected to each other in the axial direction of the shell.
[0094] 12. The sealing device according to item 7, wherein:
[0095] The sealing device is provided with an upper cover, the upper positioning hole comprises a plurality of upper positioning holes spaced apart in the circumferential direction, and the upper positioning column comprises a plurality of upper positioning columns adapted to be respectively fixed in the corresponding upper positioning holes; and / or
[0096] The sealing device is provided with a lower cover, the lower positioning hole comprises a plurality of lower positioning holes spaced apart in the circumferential direction, and the lower positioning column comprises a plurality of lower positioning columns adapted to be respectively fixed in the corresponding upper positioning holes.
[0097] 13. The sealing device according to 5, wherein:
[0098] An upper gasket is provided between the upper cover and the upper end of the shell, and the upper gasket is used to fix or squeeze the upper end of the film body; and / or
[0099] A lower gasket is arranged between the lower cover and the lower end of the shell, and the lower gasket is used to fix or squeeze the lower end of the film body.
[0100] 14. The sealing device according to 5, wherein:
[0101] The upper cover and / or the lower cover are fixed to the housing by means of screws or buckles.
[0102] 15. The sealing device according to item 1, wherein:
[0103] The film is made of rubber or thermoplastic elastomer; and / or
[0104] The elastomer is a silicone elastomer.
[0105] 16. The sealing device according to item 1, wherein:
[0106] The cross-sectional shape of the cylindrical inner wall of the shell and the cross-sectional shape of the outer peripheral surface of the elastic body are configured so that the elastic body in the shell is substantially uniformly pressed radially inward in the circumferential direction by the cylindrical inner wall.
[0107] 17. The sealing device according to 16, wherein:
[0108] The cross-sectional shape of the cylindrical inner wall of the housing is the same as or similar to the cross-sectional shape of the outer peripheral surface of the elastic body.
[0109] 18. The sealing device according to 16, wherein:
[0110] The cross-sectional shape of the cylindrical inner wall of the shell and the cross-sectional shape of the outer peripheral surface of the elastic body are circular or regular polygonal; or
[0111] The cross-sectional shape of the cylindrical inner wall of the shell is circular, and the cross-sectional shape of the outer peripheral surface of the elastic body is a regular polygon.
[0112] 19. A abdominal puncture device, comprising:
[0113] shell;
[0114] A sealing device according to any one of 1-18, wherein the sealing device is suitable for being fixed within the housing.
[0115] 20. The abdominal puncture device according to 19, wherein:
[0116] The outer wall of the housing of the sealing device is provided with a step, a sealing ring is sleeved on the step, and the outer shell of the trocar is provided with a sealing structure for pressing the sealing ring.
[0117] While embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealing device, comprising: A shell, the shell being a cylindrical structure and defining a cylindrical inner wall; An elastic body is disposed in a space defined by the cylindrical inner wall of the housing, the elastic body is columnar and has a passage therein that passes through the center line of the column; and a thin film body, the thin film body comprising a film body cylindrical portion passing through the channel, the upper end of the thin film body being fixed to the upper end of the shell, and the lower end of the thin film body being fixed to the lower end of the shell, in: The membrane cylindrical part of the thin film body allows a rod to pass through. When no rod passes through, the membrane cylindrical part is suitable for being squeezed by the elastomer and in a closed sealing state. When a rod passes through, the membrane cylindrical part is squeezed by the elastomer and is suitable for sealing and engaging the outer surface of the rod.
2. The sealing device according to claim 1, wherein: The upper end of the film body covers the upper end of the elastic body and is fixed to the upper end of the shell, and the lower end of the film body covers the lower end of the elastic body and is fixed to the lower end of the shell.
3. The sealing device according to claim 1, wherein: The upper end of the film body is provided with an annular transversely extending upper portion, the lower end of the film body is provided with an annular transversely extending lower portion, the transversely extending upper portion of the film body is fixed to the upper end of the shell, and the transversely extending lower portion of the film body is fixed to the lower end of the shell.
4. The sealing device according to claim 3, wherein: The laterally extending upper portion of the film body covers the upper end of the elastic body and is fixed to the upper end of the shell, and the laterally extending lower portion of the film body covers the lower end of the elastic body and is fixed to the lower end of the shell.
5. The sealing device according to any one of claims 1 to 4, further comprising: An annular upper cover and / or an annular lower cover, wherein the upper cover covers the upper end of the shell to fix the upper end of the film body to the upper end of the shell, and the lower cover covers the lower end of the shell to fix the lower end of the film body to the lower end of the shell.
6. The sealing device according to claim 5, wherein: The sealing device is provided with an upper cover, the upper end of the film body is provided with an annular transversely extending upper portion, and the transversely extending upper portion of the film body is fixed to the upper end of the housing via the upper cover; and / or The sealing device is provided with a lower cover, the lower end of the film body is provided with an annular laterally extending lower portion, and the laterally extending lower portion of the film body is fixed to the lower end of the shell via the lower cover.
7. The sealing device according to claim 5, wherein: The sealing device is provided with an upper cover, and at least one upper positioning hole extending along the axial direction of the shell is provided in the wall portion of the shell at the upper end of the shell, and the upper cover is provided with at least one upper positioning column on the side facing the shell, and the upper positioning column is suitable for being fixed in the corresponding upper positioning hole; and / or The sealing device is provided with a lower cover, and at least one lower positioning hole extending along the axial direction of the shell is provided in the wall portion of the shell at the lower end of the shell, and the lower cover is respectively provided with at least one lower positioning column on the side facing the shell, and the lower positioning column is suitable for being fixed in the corresponding lower positioning hole.
8. The sealing device according to claim 7, wherein: The positioning column is suitable for being fixed in the corresponding positioning hole in an interference fit manner.
9. The sealing device according to claim 7, wherein: The sealing device is provided with an upper cover, the upper end of the film body is provided with an annular transversely extending upper portion, the transversely extending upper portion of the film body is fixed to the upper end of the shell via the upper cover, and the upper positioning post passes through the transversely extending upper portion of the film body, and / or the sealing device is provided with a lower cover, the lower end of the film body is provided with an annular transversely extending lower portion, the transversely extending lower portion of the film body is fixed to the lower end of the shell via the lower cover, and the lower positioning post passes through the transversely extending lower portion of the film body; or The sealing device is provided with an upper cover and a lower cover, the upper end of the film body covers the upper end of the elastomer and is fixed to the upper end of the shell, the lower end of the film body covers the lower end of the elastomer and is fixed to the lower end of the shell, the positioning column of the upper cover passes through the upper end of the film body covering the elastomer, and the positioning column of the lower cover passes through the lower end of the film body covering the elastomer.
10. The sealing device according to claim 7, wherein: At least one of the positioning posts is provided with a pointed end or a narrowed end at its end.
11. The sealing device according to claim 7, wherein: The sealing device is provided with an upper cover and a lower cover, and the upper positioning hole and the corresponding lower positioning hole are connected to each other in the axial direction of the shell.
12. The sealing device according to claim 7, wherein: The sealing device is provided with an upper cover, the upper positioning hole comprises a plurality of upper positioning holes spaced apart in the circumferential direction, and the upper positioning column comprises a plurality of upper positioning columns adapted to be respectively fixed in the corresponding upper positioning holes; and / or The sealing device is provided with a lower cover, the lower positioning hole comprises a plurality of lower positioning holes spaced apart in the circumferential direction, and the lower positioning column comprises a plurality of lower positioning columns adapted to be respectively fixed in the corresponding upper positioning holes.
13. The sealing device according to claim 5, wherein: An upper gasket is provided between the upper cover and the upper end of the shell, and the upper gasket is used to fix or squeeze the upper end of the film body; and / or A lower gasket is arranged between the lower cover and the lower end of the shell, and the lower gasket is used to fix or squeeze the lower end of the film body.
14. The sealing device according to claim 5, wherein: The upper cover and / or the lower cover are fixed to the housing by means of screws or buckles.
15. The sealing device according to claim 1, wherein: The film is made of rubber or thermoplastic elastomer; and / or The elastomer is a silicone elastomer.
16. The sealing device according to claim 1, wherein: The cross-sectional shape of the cylindrical inner wall of the shell and the cross-sectional shape of the outer peripheral surface of the elastic body are configured so that the elastic body in the shell is substantially uniformly pressed radially inward in the circumferential direction by the cylindrical inner wall.
17. The sealing device according to claim 16, wherein: The cross-sectional shape of the cylindrical inner wall of the housing is the same as or similar to the cross-sectional shape of the outer peripheral surface of the elastic body.
18. The sealing device according to claim 16, wherein: The cross-sectional shape of the cylindrical inner wall of the shell and the cross-sectional shape of the outer peripheral surface of the elastic body are circular or regular polygonal; or The cross-sectional shape of the cylindrical inner wall of the shell is circular, and the cross-sectional shape of the outer peripheral surface of the elastic body is a regular polygon.
19. A abdominal puncture device, comprising: shell; The sealing device according to any one of claims 1-18, wherein the sealing device is suitable for being fixed in the housing.
20. The abdominal puncture device according to claim 19, wherein: The outer wall of the housing of the sealing device is provided with a step, a sealing ring is sleeved on the step, and the outer shell of the trocar is provided with a sealing structure for pressing the sealing ring.