A tubular instrument seal

Abstract

The present invention relates to a sealing member for a tubular instrument, which comprises an upper sealing unit and a lower sealing unit connected below the upper sealing unit; the upper sealing unit includes a fixing part for connecting with the tubular instrument and at least two upper valve flaps arranged on the fixing part and inclined downward; the lower sealing unit includes at least two lower valve flaps inclined upward. For the sealing member for a tubular instrument of the present invention, the upper valve flaps and the lower valve flaps facing opposite directions enable the sealing member to have a bilateral guiding function, and there are guiding structures when the instrument enters and exits the opening and closing seam of the sealing member. Especially when taking specimens, compared with the sealing member without a guiding structure at the flat bottom opening, the sealing member for a tubular instrument of the present invention has less resistance, is easier to take out the specimen, and at the same time reduces the risk of tearing the sealing member.

Description

Technical Field

[0001] The present invention relates to a sealing member for a tubular instrument. Background Art

[0002] At present, most of the air-blocking valves in existing trocars use sealing rings to achieve the sealing effect. However, most sealing rings only have a unilateral guiding function, and it is not smooth enough for instruments to enter and exit through the trocar channel during surgery. Especially when doctors take specimens during surgery, they need to use a greater force to take out the specimens from the puncture channel, and the sealing ring may be torn during the operation, bringing unnecessary trouble to doctors. It can be seen that traditional sealing rings have great disadvantages when instruments enter and exit or specimens are taken out during surgery, which is not conducive to the passage of instruments through the puncture channel or the taking out of specimens. In addition, during the long-term operation of traditional sealing rings, the sealing stability is poor and they cannot be closed. Summary of the Invention

[0003] The purpose of the present invention is to provide a sealing member for a tubular instrument with a simple structure, good sealing effect and bilateral guiding function.

[0004] The purpose of the present invention is achieved through the following technical solutions: A sealing member for a tubular instrument, which includes an upper sealing unit and a lower sealing unit connected below the upper sealing unit;

[0005] The upper sealing unit includes a fixing part for connecting with the tubular instrument and at least two upper valves arranged on the fixing part and inclined downward; the lower sealing unit includes at least two lower valves inclined upward.

[0006] Compared with the prior art, the advantages of the present invention are as follows:

[0007] 1. For this sealing member for a tubular instrument, the upper and lower valves facing in opposite directions enable the sealing member to have a bilateral guiding function, and there are guiding structures when the instrument enters and exits the opening and closing seam of the sealing member. Especially when taking specimens, compared with the sealing member without a guiding structure at the bottom flat opening, the sealing member for a tubular instrument of the present invention has less resistance and is easier to take out the specimen, and at the same time reduces the risk of tearing the sealing member.

[0008] 2. The connection part between the guiding cylinder and the annular fixing disk is a chamfer structure inclined downward, which can reduce the interference of the closing of the valve, reduce the force, and accelerate the closing.

[0009] 3. The groove on the side wall of this sealing member for a tubular instrument enables the upper and lower valves to quickly rebound when the instrument is withdrawn on the one hand, and enables the sealing performance of this sealing member for a tubular instrument to be more stable on the other hand.

[0010] 4. In addition, this sealing member for a tubular instrument also has the advantages of simple structure and good sealing effect. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the cross seal of the present invention.

[0012] Figure 2 is Figure 1 The sectional view of.

[0013] Figure 3 is Figure 1 The top view of.

[0014] Figure 4 It is a three-dimensional view of the cross seal.

[0015] Figure 5 It is a three-dimensional view of the V seal of the present invention.

[0016] Figure 6 It is a schematic diagram of the effect of air pressure on the side wall groove of the cross seal.

[0017] Figure 7 It is a schematic diagram of the effect of air pressure on the side wall groove of the V seal.

[0018] Figure 8 It is a schematic structural diagram of a trocar with a seal for a tubular instrument.

[0019] Figure 9 It is a schematic diagram of the state when the instrument enters the trocar sheath.

[0020] Figure 10 It is a schematic diagram of the state when the instrument leaves the trocar sheath.

[0021] Label description: 1 Seal for tubular instrument, 11 Annular fixing plate, 111 Annular convex edge, 12 Upper valve, 13 Lower valve, 14 Opening and closing seam, 15 Cylindrical body, 16 Groove, 17 Guide tube, 18 Chamfer structure, 21 Puncture needle, 211 Rear cover, 212 Puncture core rod, 22 Trocar sheath, 221 Sealing upper cover, 222 Gas injection valve, 223 Trocar sheath tube, 224 Limiter, 225 O-ring, 3 Instrument, 4 Specimen. Detailed implementation mode

[0022] The content of the present invention will be described in detail below with reference to the accompanying drawings of the specification and embodiments:

[0023] Such as Figures 1 to 7 Shown is a schematic diagram of an embodiment of the seal for a tubular instrument provided by the present invention.

[0024] The seal 1 for a tubular instrument can be used in a tubular instrument.

[0025] The seal 1 for a tubular instrument includes an upper sealing unit and a lower sealing unit connected below the upper sealing unit;

[0026] The upper sealing unit includes a fixing part for connecting with a tubular instrument and at least two upper valve flaps 12 arranged on the fixing part and inclined downward; the upper valve flaps 12 are annularly distributed around the central axis of the tubular instrument (preferably annularly arrayed with a point on the central axis of the tubular instrument as the center of the circle), and the inner edges between the upper valve flaps 12 are closely adjacent to each other to form an upper opening and closing seam;

[0027] The lower sealing unit includes at least two lower valve flaps 13 inclined upward, the lower valve flaps 13 are annularly distributed around the central axis of the tubular instrument (preferably annularly arrayed with a point on the central axis of the tubular instrument as the center of the circle), and the inner edges between the lower valve flaps 13 are closely adjacent to each other and form a lower opening and closing seam communicating with the upper opening and closing seam.

[0028] The upper valve flaps 12 and the lower valve flaps 13 are symmetrically distributed up and down with the cross-section of the tubular instrument as the symmetry plane.

[0029] The inner edge of the upper valve flap 12 is connected to the inner edge of the lower valve flap 13 located below it, so that the upper opening and closing seam and the lower opening and closing seam are connected into one body.

[0030] For the convenience of expression, the seam formed by connecting the upper opening and closing seam and the lower opening and closing seam into one body is collectively called the opening and closing seam 14.

[0031] The inner edge of the upper valve flap 12 is connected to the inner edge of the lower valve flap 13 located below it, so that the upper sealing unit and the lower sealing unit are connected to form one body.

[0032] Both the upper valve flaps 12 and the lower valve flaps 13 can be 4, and both the upper opening and closing seam and the lower opening and closing seam are cross-shaped.

[0033] Both the upper valve flaps 12 and the lower valve flaps 13 can be 2, and both the upper opening and closing seam and the lower opening and closing seam are linear.

[0034] The fact that there are 4 or 2 upper and lower valve flaps respectively is only a common embodiment of the tubular instrument seal 1 of the present invention, and the number of upper and lower valve flaps is not limited to 4 or 2.

[0035] The present invention names the tubular instrument seal 1 with a cross-shaped opening and closing seam 14 as a cross seal. The tubular instrument seal 1 with a linear opening and closing seam 14 is named a V seal. Because of the shape formed by the combination of 2 upper valve flaps 12, its cross-section is V-shaped, so it is named a V seal.

[0036] The tubular instrument seal 1 of the present invention is made of a flexible elastic material, such as silicone rubber, TPE, etc. The upper valve 12 is tilted downward, the lower valve 13 is tilted upward, and the inner edge of the upper valve 12 is connected to the inner edge of the lower valve 13 located below it, so that the side wall of the entire tubular instrument seal 1 will form an inwardly concave groove 16. When the instrument 3 passes through the upper and lower valves, the upper and lower valves will be stretched open when subjected to upward or downward external forces. The presence of the groove 16, on the one hand, allows the upper and lower valves to rebound quickly when the instrument 3 is withdrawn, and on the other hand, it can make the sealing of the tubular instrument seal 1 more stable. Figure 6 、 7 As shown: the side walls of the cross seal (i.e., when there are 4 upper valves 12 and 4 lower valves 13) and the V seal (i.e., when there are 2 upper valves 12 and 2 lower valves 13) are both provided with grooves 16. During the operation, the gas pressure in the puncture sheath 223 passes through the grooves 16 on the side walls of the seal to support the upper and lower valves, thereby achieving the purpose of closing the incision, and its sealing stability is better.

[0037] The lower sealing unit further includes a cylindrical body 15 that passes through the upper and lower parts, and the outer edge of the lower valve 13 is connected to the cylindrical body 15 .

[0038] The fixing portion is an annular fixing disk 11 , and the upper valve 12 is arranged below the annular fixing disk 11 and its outer edge is connected to the annular fixing disk 11 .

[0039] The upper sealing unit also includes a guide cylinder 17 connected between the annular fixing disk 11 and the upper valve 12; the guide cylinder 17 is communicated with the annular fixing disk 11 and its upper end is connected to the annular fixing disk 11, and the upper valve 12 is arranged at the lower end of the guide cylinder 17; the connection between the guide cylinder 17 and the annular fixing disk 11 is a downward-inclined chamfered structure 18.

[0040] like Figure 2 As shown, the annular retaining plate 11 and the upper valve 12 are connected via a guide cylinder 17. The upper end of the guide cylinder 17 is connected to the inner edge of the annular retaining plate 11, and the outer edge of the upper valve 12 is connected to the lower end of the guide cylinder 17. The connection between the guide cylinder 17 and the annular retaining plate 11 is chamfered, which can reduce interference with valve closure, reduce the force applied, and accelerate closure.

[0041] The outer edge of the annular fixing disk 11 is provided with an annular protrusion 111 extending downward.

[0042] The tubular instrument seal 1 of the present invention can be used in most tubular instruments (such as puncture devices) that need to be sealed and inserted into and out of the instrument 3. Figure 8As shown, the puncture device includes a puncture needle 21 and a puncture sheath 22; the puncture needle 21 includes a rear cover 211 with a handle and a puncture core rod 212; the puncture sheath 22 includes a sealing cover 221, an insufflation valve 222, a puncture sheath tube 223, and a stopper 224. Its sealing system includes an O-ring 225. When the tubular instrument seal 1 of the present invention serves as a seal for the puncture device, it can be positioned below the O-ring 225 and, in combination with the O-ring 225, form the sealing system for the puncture sheath 22. When the tubular instrument seal 1 is positioned on the puncture sheath 22, its annular flange 111 is positioned on the puncture sheath 22 and secured by the sealing cover 221 of the puncture sheath 22, thereby securing the tubular instrument seal 1 within the puncture sheath 22. The opening and closing seam 14 of the tubular instrument seal 1 communicates with the instrument access channel of the puncture sheath 22. The instrument 3 or puncture needle 21, which enters through the through-hole in the sealed upper cover 221 of the puncture sheath 22, passes through the O-ring 225, the opening and closing seam 14 of the tubular instrument seal 1, and then enters the human body through the puncture sheath 223. The puncture device with this seal, when used in conjunction with an endoscope, can be used to puncture the human abdomen during surgery and establish an instrument channel. The surgical instrument 3 passes through the puncture channel to perform surgical operations or remove specimens 4.

[0043] When the instrument 3 enters the channel of the puncture sheath 22, the instrument 3 will exert a downward opening force on the upper valve 12 and the lower valve 13 of the tubular instrument seal 1, and the upper valve 12 and the lower valve 13 on the seal will deform downward, and the opening and closing seam 14 will be opened to form a channel for the instrument 3 to enter, so that the instrument 3 can enter smoothly. Figure 9 shown.

[0044] When the instrument 3 is withdrawn, the instrument 3 will exert an upward pulling force on the upper valve 12 and the lower valve 13 of the tubular instrument seal 1. The upper valve 12 and the lower valve 13 on the seal will deform upward to form a channel for the instrument 3 and the specimen 4 to be pulled out, so that the specimen 4 on the instrument 3 can be taken out smoothly. Figure 10 shown.

[0045] The tubular instrument seal 1 of the present invention features upper and lower valves 12 and 13, providing a dual-sided guide mechanism for the instrument 3 as it enters and exits the seal's opening and closing joints 14. The upper valve 12 serves as a downward guide for the instrument 3 during entry, while the lower valve 13 serves as an upward guide for withdrawal. Especially during specimen removal 4, the tubular instrument seal 1 of the present invention offers less resistance than seals with flat bottoms and no guides, making specimen removal easier while also reducing the risk of tearing the seal.

[0046] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. A tubular instrument seal, characterized in that: It includes an upper sealing unit and a lower sealing unit connected below the upper sealing unit; The upper sealing unit includes a fixing part for connecting with a tubular instrument and at least two upper valve flaps (12) arranged on the fixing part and inclined downward; the lower sealing unit includes at least two lower valve flaps (13) inclined upward; The fixing part is an annular fixing disc (11), and the upper valve flaps (12) are arranged below the annular fixing disc (11) and connected to the annular fixing disc (11); The upper sealing unit further includes a guiding cylinder (17) connected between the annular fixing disc (11) and the upper valve flaps (12); the guiding cylinder (17) is communicated with the annular fixing disc (11) and its upper end is connected to the annular fixing disc (11), and the upper valve flaps (12) are arranged at the lower end of the guiding cylinder (17); the connection part between the guiding cylinder (17) and the annular fixing disc (11) is a chamfer structure (18) inclined downward; The outer edge of the annular fixing disc (11) is provided with a downward-extending annular flange (111).

2. The tubular device seal according to claim 1, characterized in that: The upper valve flaps (12) are annularly distributed around the central axis of the tubular instrument, and the inner edges of the upper valve flaps (12) are closely adjacent to each other to form an upper opening and closing seam; The lower valve flaps (13) are annularly distributed around the central axis of the tubular instrument, and the inner edges of the lower valve flaps (13) are closely adjacent to each other and form a lower opening and closing seam communicated with the upper opening and closing seam.

3. The tubular device seal according to claim 2, wherein: The upper valve flaps (12) and the lower valve flaps (13) are symmetrically distributed up and down with the cross-section of the tubular instrument as the symmetry plane.

4. The tubular device seal according to claim 3, wherein: The inner edge of the upper valve flap (12) is connected to the inner edge of the lower valve flap (13) located below it, so that the upper opening and closing seam and the lower opening and closing seam are connected into one body.

5. The tubular device seal according to claim 3 or 4, characterized in that: Both the upper valve flaps (12) and the lower valve flaps (13) are 4, and both the upper opening and closing seam and the lower opening and closing seam are cross-shaped.

6. The tubular device seal according to claim 3 or 4, wherein: Both the upper valve flaps (12) and the lower valve flaps (13) are 2, and both the upper opening and closing seam and the lower opening and closing seam are linear.

7. The tubular instrument seal according to claim 1, wherein: The lower sealing unit further includes a cylinder body (15) penetrating up and down, and the outer edge of the lower valve flap (13) is connected to the cylinder body (15).

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