Puncture cannula with soft gel structure seal

Abstract

The present application provides a kind of puncture cannula with soft glue structure sealing, including sealing upper cover, suspension guide sealing module, sealing lower cover, air valve and puncture cannula, wherein suspension guide sealing module is sealed by sealing upper cover and sealing lower cover and is clamped sealing;The center of the butt joint end of the puncture cannula is provided with a puncture hole and an annular mounting groove around the puncture hole, two groups of guide connection jacks are also provided outside the annular mounting groove and are arranged symmetrically in cross, and relative arrangement is provided with containing notch on the two sides of the position different from guide connection jack and with card slot protection piece at the bottom end of containing notch;And corresponding to the position of containing notch, a clamping lug is provided at the lower end of the sealing lower cover.The present application provides a kind of puncture cannula with soft glue structure sealing, simple structure, compared with traditional rotary sealing structure, greatly reduces the number of parts, and does not need to be connected directly through buckle structure without spring and spring return structure and related rotary groove.

Description

Technical Field

[0001] This invention relates to the field of interventional medical device technology, and in particular to a puncture cannula with a soft rubber structure seal. Background Technology

[0002] A trocar is a commonly used instrument in minimally invasive surgery. The main structure of a trocar consists of two parts: a trocar rod and a trocar cannula. The trocar cannula needs to accommodate the trocar rod, allowing it to enter the body through the cannula. Existing trocar cannulas are mostly quite complex in structure, such as the trocar cannula device for laparoscopic trocars disclosed in CN108309412A and the trocar cannula disclosed in CN113456180B. Both of these trocar cannulas employ complex part-connection structures for their internal sealing components to ensure internal sealing. Such structures are not only expensive but also difficult to assemble. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a puncture cannula with a soft rubber structure seal, thereby solving the problems of complex structure and poor sealing performance of the existing puncture cannula.

[0004] To solve the above-mentioned technical problems, the present invention provides a puncture cannula with a soft rubber structure seal, including a sealing upper cover (10), a floating guide sealing module (20), a sealing lower cover (30), an air shut-off valve (40), and a puncture cannula (50). The floating guide sealing module (20) is connected and clamped by the sealing upper cover (10) and the sealing lower cover (30) for sealing, allowing the floating guide sealing module (20) to float up and down in the space after the sealing upper cover (10) and the sealing lower cover (30) are connected. The puncture cannula (50) has a puncture hole (51) at the center of its connecting end and an annular mounting groove (52) surrounding the puncture hole (51). Outside the annular mounting groove (52)... The side is also provided with two sets of guide connection holes (53) arranged in a cross symmetrical manner, and on both sides different from the guide connection holes (53) are relatively arranged receiving notches (54) and a slot protection member (55) at the bottom of the receiving notch (54); the lower end of the sealing cover (30) is provided with two sets of guide connection columns (31), the guide connection columns (31) correspond to the positions of the guide connection holes (53); and corresponding to the position of the receiving notch (54), the lower end of the sealing cover (30) is provided with a snap-fit ​​ear block (32), the snap-fit ​​ear block (32) is connected in the receiving notch (54), and the snap-fit ​​teeth at the end of the snap-fit ​​ear block (32) are connected to the slot protection member (55).

[0005] The air-locking valve (40) has an annular retaining ring (41) around its outer circumference; and corresponding to the annular retaining ring (41), a first inwardly inclined annular mating surface (42) is provided on the outer periphery of the front end of the air-locking valve (40); the first inwardly inclined annular mating surface (42) and the outwardly inclined annular mating surface (34) on the sealing lower cover (30) are mated and connected to form a seal.

[0006] A sealing ring (33) is also provided at the lower end of the sealing cover (30). The sealing ring (33) is a sloping structure with a high center and a low periphery. The sealing ring (33) is pressed against the inward pressing surface (43) of the air-locking valve (40). The annular support wall (56) formed inside the annular mounting groove (52) of the sealing cover (30) provides support for the bottom of the inward pressing surface (43). While pressing the inward pressing surface (43) against the sealing cover (30), the inward pressing surface (43) of the air-locking valve (40) expands outward, so that the main body of the air-locking valve (40) fits against the inner wall of the puncture sleeve (50), making the air-locking effect of the air-locking valve (40) better.

[0007] The lower end of the snap-fit ​​ear block (32) is provided with a protective panel on the puncture cannula, and the protective panel is L-shaped and integrally connected with the puncture cannula (50).

[0008] The receiving notch (54) is trapezoidal in shape. Correspondingly, the shape of the snap-fit ​​lug (32) is adapted to the shape of the receiving notch (54). When the snap-fit ​​lug (32) is connected to the receiving notch (54), the height of the outer surface of the snap-fit ​​lug (32) is the same as the height of the two side surfaces of the receiving notch (54).

[0009] The guide connecting column (31) is connected to the guide connecting socket (53) by means of guide connection.

[0010] The outer surface of the snap-fit ​​ear block (32) is provided with a corrugated surface.

[0011] There is a gap between the snap-fit ​​lug (32) and the inner surface of the receiving notch (54) to allow the snap-fit ​​lug (32) to deform toward the inner surface of the receiving notch (54) to disengage from the slot protector (55).

[0012] The suspended guide sealing module (20) includes an upper fixing cover (21), a support piece (22), a sealing cap (23), and a lower fixing seat (24). The pleated edge (231) of the sealing cap (23) is clamped and sealed by the sealing upper cover (10) and the sealing lower cover (30). The central ring platform (232) of the sealing cap (23) is clamped by the upper fixing cover (21) and the lower fixing seat (24). The support piece (22) is four-lobed, overlapping each other to form a puncture hole. The support piece (22) is located on the upper surface of the central ring platform (232) and is clamped and fixed together with the central ring platform (232) by the upper fixing cover (21) and the lower fixing seat (24).

[0013] The top of the upper fixing cover (21) is flat, and the middle is cylindrical; the inner side of the sealing upper cover (10) is provided with a first annular protrusion (11) and a second annular protrusion (12) that abut against the upper fixing cover (21), respectively abutting against the inner ring and outer ring of the upper fixing cover (21), and the inner diameter of the first annular protrusion (11) is smaller than the inner diameter of the cylindrical part of the upper fixing cover (21) to support the puncture rod.

[0014] The upper surface of the sealing cover (10) is a concave conical guide surface (13).

[0015] The structure between the pleated edge (231) and the central ring platform (232) of the sealing cap (23) is an n-shaped support sleeve (233), and the inner side of the central ring platform (232) is an inner conical support ring (234), wherein the center of the inner conical support ring (234) is a through hole; the thickness of the central ring platform (232) is greater than the thickness of other parts of the sealing cap (23); the n-shaped support sleeve (233) is pressed down by the sealing cover (10), so that the central ring platform (232) forms a rebound abutment force with the first annular protrusion (11) and the second annular protrusion (12).

[0016] The lower fixing seat (24) is annular, and its height is greater than the axial depth of the inner conical support ring (234), so that the height of the through hole of the inner conical support ring (234) is lower than the height of the bottom surface of the lower fixing seat (24).

[0017] There is an elastic gap between the bottom surface of the lower fixing seat (24) and the sealing lower cover (30), and the size of the gap is not greater than the thickness of the middle ring platform (232).

[0018] The present invention provides a puncture cannula with a soft rubber structure seal. The structure is simple and significantly reduces the number of parts compared with the traditional rotary sealing structure. It does not require snap rings, spring return structures and related rotary grooves. It is directly connected by a snap-fit ​​structure, which can ensure better sealing and connection, greatly reduce production costs, and has great market application value. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of the puncture cannula with a soft rubber seal according to the present invention.

[0020] Figure 2 This is a cross-sectional view of the puncture cannula with a soft rubber seal according to the present invention.

[0021] Figure 3 This is a schematic diagram of the exploded structure of the puncture cannula with a soft rubber seal according to the present invention.

[0022] Figure 4 This is an exploded structural diagram of the sealing upper cover, sealing lower cover, and floating guide sealing module described in this invention.

[0023] Figure 5 This is a schematic diagram of the combined structure of the support sheet of the present invention.

[0024] Figure 6 This is a schematic diagram of the suspended guide sealing module of the present invention.

[0025] Figure 7 This is a schematic diagram of the sealing cap. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0029] This invention provides a puncture cannula with a soft rubber structure seal, including a sealing upper cover 10, a floating guide sealing module 20, a sealing lower cover 30, an air-closing valve 40, and a puncture cannula 50. The floating guide sealing module 20 can seal the sealing cap 23 between the sealing upper cover 10 and the sealing lower cover 30, and allows the floating guide sealing module 20 to float slightly between the sealing upper cover 10 and the sealing lower cover. This allows the puncture rod to be sealed after being inserted into the puncture cannula, and allows the puncture rod to wobble slightly in the radial direction for smoother assembly into the puncture cannula. The floating guide sealing module 20 is mated and clamped by the sealing upper cover 10 and the sealing lower cover 30 for sealing, allowing the floating guide sealing module 20 to float slightly between the sealing upper cover 10 and the sealing lower cover 30. The sealing lower cover 30 floats up and down in the space after docking; the center of the docking end of the piercing sleeve 50 is provided with a piercing hole 51 and an annular mounting groove 52 surrounding the piercing hole 51. On the outside of the annular mounting groove 52, there are two sets of guide connection holes 53 arranged in a cross shape. On both sides opposite to the guide connection holes 53, there are oppositely arranged receiving notches 54 and a slot protection member 55 at the bottom of the receiving notch 54; the lower end of the sealing lower cover 30 is provided with two sets of guide connection columns 31, the guide connection columns 31 correspond to the guide connection holes 53; and corresponding to the position of the receiving notch 54, there is a snap-fit ​​ear block 32 at the lower end of the sealing lower cover 30. The snap-fit ​​ear block 32 is connected in the receiving notch 54, and the snap-fit ​​teeth at the end of the snap-fit ​​ear block 32 are connected to the slot protection member 55. In this embodiment, the sealing lower cover 30 is connected to the guide connection hole 53 and the slot protection member 55 of the puncture sleeve 50 through the guide connection column 31 and the snap-fit ​​ear block 32. The guide connection is used to guide and lock the guide connection column 31 and the guide connection hole 53, and then the connection between the snap-fit ​​ear block 32 and the slot protection member 55 is used to lock and limit the movement to prevent loosening.

[0030] The puncture cannula with a soft rubber structure seal provided in this embodiment of the invention has an extremely simple structure compared with conventional rotary locking puncture cannulas. Furthermore, while simplifying the structure, it can better fix and lock the air-closing valve, avoiding the problem of reduced sealing effect of the air-closing valve due to structural simplification.

[0031] The air-locking valve 40 has an annular retaining ring 41 around its outer circumference; and corresponding to the annular retaining ring 41, a first inwardly inclined annular mating surface 42 is provided on the outer periphery of the front end of the air-locking valve 40; the first inwardly inclined annular mating surface 42 and the outwardly inclined annular mating surface 34 on the sealing lower cover 30 are mated and connected to form a seal.

[0032] A sealing ring 33 is also provided at the lower end of the sealing cover 30. The sealing ring 33 has a sloping structure with a high center and a low periphery. The sealing ring 33 is pressed against the inward pressing surface 43 of the air-locking valve 40. The annular support wall 56 formed inside the annular mounting groove 52 of the sealing cover 30 provides support for the bottom of the inward pressing surface 43. While pressing the inward pressing surface 43 against the sealing cover 30, the inward pressing surface 43 of the air-locking valve 40 expands outward, thereby making the main body of the air-locking valve 40 fit against the inner wall of the puncture sleeve 50, thus improving the air-locking effect of the air-locking valve 40.

[0033] A stepped partition is formed between the first inwardly inclined annular mating surface 42 and the inwardly inclined pressing surface 43 to prevent the deformation caused by the inwardly inclined pressing surface 43 being squeezed from extending to the first inwardly inclined annular mating surface (which would lead to a decrease in the sealing effect). This allows both the first inwardly inclined annular mating surface 42 and the inwardly inclined pressing surface 43 to be connected to the sealing lower cover 30, resulting in a very good sealing effect.

[0034] The lower end of the snap-fit ​​ear block 32 is provided with a protective panel 56 on the puncture sleeve. The protective panel 56 is L-shaped and integrally formed with the puncture sleeve 50. The protective panel 56 can not only improve the support strength of the slot protection component 55, but also make the overall structure of the puncture sleeve 50 more aesthetically pleasing.

[0035] The receiving notch 54 is trapezoidal in shape. Correspondingly, the snap-fit ​​lug 32 is adapted to the shape of the receiving notch 54. When the snap-fit ​​lug 32 is connected to the receiving notch 54, the height of the outer surface of the snap-fit ​​lug 32 is the same as the height of the two side surfaces of the receiving notch 54.

[0036] The guide connecting post 31 is connected to the guide connecting socket 53 via a guide connection. Multiple guide connecting posts 31 employ a foolproof design to prevent installation errors.

[0037] The outer surface of the snap-fit ​​ear block 32 is provided with a corrugated surface, which makes it easy to press the snap-fit ​​ear block 32 by hand, thereby separating the snap-fit ​​ear block 32 from the snap-fit ​​groove protection member 55.

[0038] There is a gap between the snap-fit ​​lug 32 and the inner surface of the receiving notch 54 to allow the snap-fit ​​lug 32 to deform toward the inner surface of the receiving notch 54 to disengage from the slot protector 55.

[0039] The suspended guide sealing module 20 includes an upper fixing cover 21, a support piece 22, a sealing cap 23, and a lower fixing seat 24. The corrugated edge 231 of the sealing cap 23 is sealed by the upper sealing cover 10 and the lower sealing cover 30, and the central annular platform 232 of the sealing cap 23 is held by the upper fixing cover 21 and the lower fixing seat 24. The support piece 22 has four segments that overlap to form piercing holes. The support piece 22 is located on the upper surface of the central annular platform 232 and is held and fixed together with the central annular platform 232 by the upper fixing cover 21 and the lower fixing seat 24. The upper fixing cover 21 is connected to the lower fixing seat 24 via an interference fit through a post and automatically locks in place.

[0040] The top of the upper fixing cover 21 is flat, and the middle is cylindrical; the inner side of the sealing upper cover 10 is provided with a first annular protrusion 11 and a second annular protrusion 12 that abut against the upper fixing cover 21, respectively abutting against the inner ring and outer ring of the upper fixing cover 21, and the inner diameter of the first annular protrusion 11 is smaller than the inner diameter of the cylindrical part of the upper fixing cover 21, so as to support the puncture rod.

[0041] The upper surface of the sealing cover 10 is a concave conical guide surface 13, which can guide the insertion of the puncture rod.

[0042] The structure between the pleated edge 231 and the central ring platform 232 of the sealing cap 23 is an n-shaped support sleeve 233. The inner side of the central ring platform 232 is an inner conical support ring 234, wherein the center of the inner conical support ring 234 is a through hole. The thickness of the central ring platform 232 is greater than the thickness of other parts of the sealing cap 23. The n-shaped support sleeve 233 is pressed down by the sealing cover 10, so that the central ring platform 232 forms a rebound abutment force with the first annular protrusion 11 and the second annular protrusion 12.

[0043] The lower fixing seat 24 is annular, and its height is greater than the axial depth of the inner conical support ring 234, so that the height of the through hole of the inner conical support ring 234 is lower than the height of the bottom surface of the lower fixing seat 24.

[0044] There is an elastic gap between the bottom surface of the lower fixing seat 24 and the sealing lower cover 30, and the size of the gap is not greater than the thickness of the middle ring platform 232.

[0045] The present invention provides a puncture cannula with a soft rubber structure seal. The structure is simple and significantly reduces the number of parts compared with the traditional rotary sealing structure. It does not require snap rings, spring return structures and related rotary grooves. It is directly connected by a snap-fit ​​structure, which can ensure better sealing and connection, greatly reduce production costs, and has great market application value.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A puncture cannula with a soft rubber structure seal, comprising a sealing upper cover (10), a suspended guide sealing module (20), a sealing lower cover (30), an air-closing valve (40), and a puncture cannula (50), characterized in that, in, The suspended guide sealing module (20) is sealed by the sealing upper cover (10) and the sealing lower cover (30), allowing the suspended guide sealing module (20) to float up and down in the space after the sealing upper cover (10) and the sealing lower cover (30) are connected; the center of the docking end of the piercing sleeve (50) is provided with a piercing hole (51) and an annular mounting groove (52) surrounding the piercing hole (51). On the outside of the annular mounting groove (52), there are two sets of guide connection holes (53) arranged in a cross symmetrical manner, and on both sides of the position different from the guide connection holes (53) The sealing lower cover (30) is provided with a receiving notch (54) arranged opposite to each other and a slot protection member (55) at the bottom end of the receiving notch (54); the lower end of the sealing lower cover (30) is provided with two sets of guide connecting columns (31), the guide connecting columns (31) and the guide connecting holes (53) are positioned accordingly; and corresponding to the position of the receiving notch (54), a snap-fit ​​ear block (32) is provided at the lower end of the sealing lower cover (30), the snap-fit ​​ear block (32) is connected in the receiving notch (54), and the snap-fit ​​teeth at the end of the snap-fit ​​ear block (32) are connected to the slot protection member (55); The suspended guide sealing module (20) includes an upper fixing cover (21), a support piece (22), a sealing cap (23), and a lower fixing seat (24). The pleated edge (231) of the sealing cap (23) is clamped and sealed by the sealing upper cover (10) and the sealing lower cover (30). The central ring platform (232) of the sealing cap (23) is clamped by the upper fixing cover (21) and the lower fixing seat (24). The support piece (22) is four-lobed, overlapping each other to form a puncture hole. The support piece (22) is located on the upper surface of the central ring platform (232) and is clamped and fixed together with the central ring platform (232) by the upper fixing cover (21) and the lower fixing seat (24). There is an elastic gap between the bottom surface of the lower fixing seat (24) and the sealing lower cover (30), and the size of the gap is not greater than the thickness of the middle ring platform (232).

2. The puncture cannula according to claim 1, characterized in that, The air-locking valve (40) has an annular retaining ring (41) around its outer circumference; and corresponding to the annular retaining ring (41), a first inwardly inclined annular mating surface (42) is provided on the outer periphery of the front end of the air-locking valve (40); the first inwardly inclined annular mating surface (42) and the outwardly inclined annular mating surface (34) on the sealing lower cover (30) are mated and connected to form a seal.

3. The puncture cannula according to claim 2, characterized in that, A sealing ring (33) is also provided at the lower end of the sealing cover (30). The sealing ring (33) is a sloping structure with a high center and a low periphery. The sealing ring (33) is pressed against the inward pressing surface (43) of the air-locking valve (40). The annular support wall (56) formed inside the annular mounting groove (52) of the sealing cover (30) provides support for the bottom of the inward pressing surface (43). While pressing the inward pressing surface (43) against the sealing cover (30), the inward pressing surface (43) of the air-locking valve (40) expands outward, so that the main body of the air-locking valve (40) fits against the inner wall of the puncture sleeve (50), making the air-locking effect of the air-locking valve (40) better.

4. The puncture cannula according to claim 1, characterized in that, The lower end of the snap-fit ​​ear block (32) is provided with a protective panel on the puncture cannula, and the protective panel is L-shaped and integrally connected with the puncture cannula (50).

5. The puncture cannula according to claim 3, characterized in that, The receiving notch (54) is trapezoidal in shape. Correspondingly, the shape of the snap-fit ​​lug (32) is adapted to the shape of the receiving notch (54). When the snap-fit ​​lug (32) is connected to the receiving notch (54), the height of the outer surface of the snap-fit ​​lug (32) is the same as the height of the two side surfaces of the receiving notch (54).

6. The puncture cannula according to claim 1, characterized in that, The guide connecting column (31) is connected to the guide connecting socket (53) by a guide connection method; The outer surface of the snap-fit ​​ear block (32) is provided with a corrugated surface; There is a gap between the snap-fit ​​lug (32) and the inner surface of the receiving notch (54) to allow the snap-fit ​​lug (32) to deform toward the inner surface of the receiving notch (54) to disengage from the slot protector (55).

7. The puncture cannula according to claim 1, characterized in that, The top of the upper fixing cover (21) is flat, and the middle is cylindrical; the inner side of the sealing upper cover (10) is provided with a first annular protrusion (11) and a second annular protrusion (12) that abut against the upper fixing cover (21), respectively abutting against the inner ring and outer ring of the upper fixing cover (21), and the inner diameter of the first annular protrusion (11) is smaller than the inner diameter of the cylindrical part of the upper fixing cover (21) to support the puncture rod; The upper surface of the sealing cover (10) is a concave conical guide surface (13).

8. The puncture cannula according to claim 1, characterized in that, The structure between the pleated edge (231) and the central ring platform (232) of the sealing cap (23) is an n-shaped support sleeve (233), and the inner side of the central ring platform (232) is an inner conical support ring (234), wherein the center of the inner conical support ring (234) is a through hole; the thickness of the central ring platform (232) is greater than the thickness of other parts of the sealing cap (23); the n-shaped support sleeve (233) is pressed down by the sealing cover (10), so that the central ring platform (232) forms a rebound abutment force with the first annular protrusion (11) and the second annular protrusion (12).

9. The puncture cannula according to claim 8, characterized in that, The lower fixing seat (24) is annular, and its height is greater than the axial depth of the inner conical support ring (234), so that the height of the through hole of the inner conical support ring (234) is lower than the height of the bottom surface of the lower fixing seat (24).

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