Drainage bag connector and disposable drainage bag thereof

Abstract

The utility model discloses a drainage bag joint and a disposable drainage bag thereof, the drainage bag joint is of an injection molding integrated structure, and the drainage bag joint is provided with a first connecting end and a second connecting end along the length direction of the drainage bag joint; the first connecting end is used for being fixedly connected with a liquid storage bag, and the second connecting end is used for being fixedly connected with a transmission catheter. The first connecting end comprises a body pipe extending lengthwise and a wing part integrally arranged on the outer side wall of the body pipe; each wing part comprises connecting sheets which are symmetrically arranged on the two sides of the body pipe, and each connecting sheet is provided with two welding planes which are opposite to each other. According to the drainage bag connector and the disposable drainage bag thereof, the manufacturing process of the drainage bag can be simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of medical supplies, and in particular to a drainage bag connector and a disposable drainage bag thereof. Background Art

[0002] Peritoneal dialysis uses the properties of the peritoneum as a semi-permeable membrane. The prepared dialysate is regularly and regularly infused into the patient's peritoneal cavity through a catheter by gravity. Due to the concentration gradient difference of solutes on both sides of the peritoneum, the solutes on the high-concentration side move to the low-concentration side (diffusion effect); water moves from the low-osmotic side to the high-osmotic side (osmotic effect). The peritoneal dialysis fluid is continuously replaced to achieve the purpose of removing metabolic products and toxic substances in the body and correcting water and electrolyte imbalance.

[0003] When the connector used in the waste liquid drainage bag of the existing peritoneal dialysis is inserted into the bag end of the waste liquid bag for welding, the film layers on the upper and lower sides of the connector tube need to face each other and wrap the connector tube during the docking process. At this time, if the position accuracy of the connector tube is insufficient or the accuracy of the welding head itself decreases, it is easy to cause the two film layers to form a docking gap near the connector tube when docking, and an effective seal cannot be formed, which leads to the production of defective products. As a follow-up, the connector tube of the existing waste liquid bag is bonded by glue when connecting the PVC catheter. Its assembly process is also relatively complicated and requires manual operation, which not only affects the manufacturing efficiency, but also restricts the manufacturing cost. Utility Model Content

[0004] In view of the above-mentioned deficiencies, one object of the present application is to provide a novel drainage bag connector and a disposable drainage bag thereof, so as to simplify the manufacturing process of the drainage bag and reduce the manufacturing cost.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A drainage bag connector, the drainage bag connector is an injection-molded integral structure, and has a first connection end and a second connection end along its length direction; the first connection end is used for fixedly connecting to a liquid storage bag, and the second connection end is used for fixedly connecting to a transmission catheter;

[0007] The first connecting end comprises a longitudinally extending main body tube and a wing portion integrally arranged on the outer side wall of the main body tube; the wing portion comprises connecting sheets symmetrically arranged on both sides of the main body tube, and the connecting sheets have two opposite welding planes.

[0008] As a preferred aspect, the outer wall of the main body tube is further provided with two or more connecting protrusions arranged along the length direction; the connecting protrusions protrude from the outer wall surface of the main body tube; and a filling groove is formed between two adjacent connecting protrusions.

[0009] As a preferred aspect, the width of the connecting protrusion along the length direction of the main body tube is 0.5 mm to 2 mm; the height of the connecting protrusion protruding from the outer wall of the main body tube is 0.05 mm to 1 mm.

[0010] As a preferred aspect, the connecting protrusion ring is distributed between the connecting sheets on both sides of the main body tube, and one end of the connecting protrusion ring extends continuously from one connecting sheet to another connecting sheet.

[0011] As a preferred aspect, the main body tube is provided with two or more wing portions in the length direction thereof; and the connecting sheets of the two wing portions have the same shape.

[0012] As a preferred aspect, the spacing distance between two adjacent wings is between 3 mm and 15 mm.

[0013] As a preferred aspect, the thickness of the connecting sheet is 0.01-1.5 mm, and the length in the radial direction is 0.5-10 mm; the length of the connecting sheet along the length direction of the main body tube is 1 mm-10 mm.

[0014] As a preferred aspect, the connecting sheet has an inner end connected to the main body tube and an outer end away from the main body tube; the thickness of the connecting sheet gradually decreases from the inner end to the outer end.

[0015] As a preferred aspect, the outer end is provided with convex parts and concave parts which are arranged alternately along the length direction of the main body tube.

[0016] A disposable drainage bag, comprising:

[0017] A fluid storage bag for collecting the discharged drainage fluid;

[0018] A drainage bag connector as described above, wherein the first connecting end of the drainage bag connector is fixedly connected to the liquid storage bag;

[0019] The transmission catheter has one end connected to a connecting joint and the other end fixedly sleeved outside the second connecting end of the drainage bag joint.

[0020] As a preferred aspect, the bag connecting end of the liquid storage bag has relatively connected bag opening films; the first connecting end and the wing are welded between the bag opening films, and the connecting sheet is laid flat between the two bag opening films.

[0021] As a preferred aspect, the bag connecting end has at least one welding strip for welding the bag opening membrane relative to each other; the number of the wings is equal to the number of the welding strips, and they are aligned one by one in the width direction of the liquid storage bag.

[0022] As a preferred aspect, one end of the transmission conduit is non-adhesively fitted onto the second connection end.

[0023] As a preferred aspect, the second connection end is provided with at least one vertical step facing the first connection end; the vertical step is fixedly sleeved inside the transmission conduit.

[0024] As a preferred aspect, the second connecting end is provided with a reduced diameter portion and an expanded portion; the reduced diameter portion is located on a side of the expanded portion close to the first connecting end, and an annular interface between the reduced diameter portion and the expanded portion forms the vertical step.

[0025] As a preferred aspect, the length of the reduced diameter portion is greater than one third of the inner diameter of the transmission conduit. Beneficial Effects

[0026] The drainage bag connector of the present application is provided with wings, and two bag opening films are covered on the main body tube and span the main body tube, and are covered on the wings on both sides of the main body tube. Even if there is a docking gap between the two bag opening films, the corresponding docking gap can be filled by the presence of the wings. Of course, because of the presence of the wings, the two bag opening films do not need to be tightly docked on one side of the main body tube, and only need to keep the two close to the surface of the wings for welding. In this way, the docking position requirements for the entire drainage bag connector are lower, and a higher yield can be obtained, and correspondingly, the welding and sealing quality is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 This is a schematic diagram of the structure of a disposable drainage bag provided by an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a disposable drainage bag provided by another embodiment of the present application;

[0030] Figure 3 yes Figure 1 Schematic diagram of the liquid storage bag structure;

[0031] Figure 4 yes Figure 3 A three-dimensional structural diagram of the drainage bag connector;

[0032] Figure 5 yes Figure 4 Front view of the drainage bag connector;

[0033] Figure 6 yes Figure 5 AA section view and partial enlarged view;

[0034] Figure 7 Yes Figure 4 Schematic diagram of six different cross-sectional shapes of the connecting sheet;

[0035] Figure 8 Available in 4 different shapes Figure 2 Schematic diagram of the structure of the middle drainage bag connector;

[0036] Fig. 9 yes Figure 3 A schematic cross-sectional view of the connection between the middle connecting sheet and the bag opening film;

[0037] Fig.10 It is a schematic diagram comparing the cross-sections of the connecting sheet before and after welding with the bag opening film;

[0038] Fig.11 yes Figure 1 A schematic diagram of a cross-sectional structure of a connection between a drainage bag connector and a transmission catheter;

[0039] Fig.12 It is a schematic diagram of the cross-sectional structure of the connection between the drainage bag connector and the transmission catheter provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] like Figures 1 to 12 As shown, a drainage bag connector 5 is provided in an embodiment of the present application, and the drainage bag connector 5 is an injection-molded one-piece structure, which has a first connection end 502 and a second connection end 501 along its length direction; the first connection end 502 is used to fix the connection to the liquid storage bag 6, and the second connection end 501 is used to fix the connection to the transmission catheter 3.

[0044] The first connecting end 502 includes a longitudinally extending main body tube 51 and a wing portion 52 integrally arranged on the outer side wall of the main body tube 51; the wing portion 52 includes connecting sheets 521 symmetrically arranged on both sides of the main body tube 51, and the connecting sheets 521 have two oppositely facing welding planes 527. The longitudinal extension direction is the length direction of the drainage bag connector 5.

[0045] The drainage bag connector 5 can be used to manufacture a disposable drainage bag. The disposable drainage bag is used to discharge urine, wound drainage fluid, bleeding or effusion, and its liquid storage bag 6 can also be called a waste liquid bag, which is in an empty flat state before use, and the drainage fluid is drained into the liquid storage bag 6 for storage during use.

[0046] Thus, the present application also provides a disposable drainage bag, comprising: a liquid storage bag 6, a drainage bag connector 5; and a transmission catheter 3. The liquid storage bag 6 is used to collect the drained drainage liquid. The first connection end 502 of the drainage bag connector 5 is fixedly connected to the liquid storage bag 6; one end of the transmission catheter 3 is connected to a connection connector 10, and the other end is fixedly sleeved outside the second connection end 501 of the drainage bag connector 5.

[0047] The connection connector 10 comprises a Luer connector, such as Figure 1 Female Luer connector as shown or Figure 2 Male Luer connector as shown. Figure 1 As shown, the connection joint can also be detachably covered with a protective cap 8. The protective cap 8 can be detachably covered on the dialysis Luer connector 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, which covers the dialysis Luer connector 15 to prevent the connection joint from being contaminated. The protective cap 8 has a pull ring, and the user can pull the protective cap 8 off the connection joint with the pull ring. The connection joint can be used to connect a drainage tube.

[0048] In this embodiment, the transmission conduit 3 is made of non-PVC material, and a liquid stop clamp may be provided thereon. Specifically, the material of the transmission conduit 3 includes a base material and an elastic material; the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE.

[0049] like Figure 1 , Figure 2 As shown, the disposable drainage bag includes a liquid storage bag 6 and a drainage bag connector 5 fixedly connected to one end of the liquid storage bag 6. One end of the liquid storage bag 6 connected to the drainage bag connector 5 is a bag connection end 61. The drainage bag connector 5 is an injection molded one-piece structure. The drainage bag connector 5 is made of non-PVC material. Specifically, the material of the drainage bag connector 5 includes a base material and an elastic material. Among them, the base material and the elastic material are the main component materials of the drainage bag connector 5, and the weight percentage of the base material and the elastic material is more than 50%; the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS.

[0050] In this embodiment, the disposable drainage bag has a bag connection end 61 welded and fixed to the first connection end 502. The drainage bag connector 5 is connected to the center of the bag connection end 61. The drainage bag connector 5 is fixedly connected to the transmission catheter 3. The tube end 31 of the transmission catheter 3 is non-adhesive and fitted outside the drainage bag connector 5. The non-adhesive fixed connection method can use a machine to automatically cold-insert the tube end onto the outside of the drainage bag connector 5, without manual squeezing and applying glue, thereby improving manufacturing efficiency. It has been verified that the existing manual glue-applying and squeezing manufacturing method has an approximate efficiency of about 2,500 pieces per 8 hours for a single worker, while the mechanical automatic cold-insertion manufacturing method of this embodiment can produce more than 9,000 pieces per 8 hours for a single worker, and the connection efficiency between the connector and the transmission catheter is increased by more than 3 times, which can significantly improve manufacturing efficiency.

[0051] like Figures 4 to 7 As shown, the drainage bag connector 5 extends along its length direction H; the drainage bag connector 5 has a second connection end 501 connected to the transmission catheter 3 and a first connection end 502 connected to the liquid storage bag 6. The main material of the drainage bag connector 5 and the transmission catheter 3 in this embodiment is the same, so that when the two are connected, they can form a fitting sealing structure due to the similar materials to avoid connection leakage. The second connection end 501 is provided with at least one vertical step 54 facing the first connection end 502. The vertical step 54 is fixedly sleeved inside the transmission catheter 3.

[0052] like Figure 4 , Figure 5As shown, the second connection end 501 is provided with a reduced diameter portion 56 and an expanded portion 55. The reduced diameter portion 56 is located on a side of the expanded portion 55 close to the first connection end 502, and the annular interface between the reduced diameter portion 56 and the expanded portion 55 forms a vertical step 54. Fig.11 , Fig.12 As shown, relying on the structure of the vertical step 54, the reduced diameter portion 56 and the expansion portion 55, the tube end 31 of the transmission catheter 3 is non-adhesively attached to the outside of the second connection end 501 of the drainage bag connector 5. Among them, the outer diameter of the reduced diameter portion 56 is larger than the inner diameter of the transmission catheter 3. Furthermore, when the tube end 31 of the transmission catheter 3 is retracted corresponding to the first sleeve portion 412 of the reduced diameter portion 56, it is still in a state of being expanded by the reduced diameter portion 56, and is closely attached to the outer wall of the reduced diameter portion 56 (non-adhesive attachment), thereby improving the connection strength and ensuring the sealing performance.

[0053] Specifically, the width of the vertical step 54 is between 1 and 20 mm. Through the vertical step 54, a hooking structure can be formed for the tube end 31 of the transmission conduit 3. The transmission conduit 3 shrinks and changes diameter when it passes through the vertical step 54 under the condition of its own elastic recovery, and then the vertical step 54 hooks the transmission conduit 3, forming a stop for the transmission conduit 3. Fig. 9 , Fig.10 As shown, the stability of the connection is ensured by forming a physical hooking structure based on the close connection between the two.

[0054] The outer edge of the end of the drainage bag connector 5 has an end chamfer 551 to reduce the outer diameter of the end to be smaller than the inner diameter of the transmission catheter 3. The diameter of the port of the end chamfer 551 is smaller than the inner diameter of the transmission catheter 3. In this way, when pushing and pushing, the end of the drainage bag connector 5 is conveniently inserted into the tube end 31 of the transmission catheter 3 by relying on the end chamfer 551, and the tube end 31 of the transmission catheter 3 is gradually expanded by insertion. Of course, the outermost (facing Figure 3 The expansion portion 55 (which is the lowest when in the embodiment of the present invention) is preferably a conical structure to facilitate squeezing in and expanding the tube end 31 of the transmission conduit 3.

[0055] The connection length between the tube end 31 of the transmission catheter 3 and the second connection end 501 is greater than the length of the expansion portion 55. Specifically, the connection length between the tube end 31 of the transmission catheter 3 and the second connection end 501 is 5 mm to 30 mm. When the transmission catheter 3 is connected to the drainage bag connector 5, the expansion portion 55 is sleeved in the tube end 31 of the transmission catheter 3. The tube end 31 of the transmission catheter 3 and the second connection end 501 are connected by cold plugging.

[0056] like Fig.11As shown, the pipe end 31 of the transmission conduit 3 mainly includes a first sleeve portion 312 sleeved outside the reduced diameter portion 56 and a second sleeve portion 311 sleeved on the expansion portion 55, wherein the inner diameter of the first sleeve portion 312 is larger than the inner diameter of the transmission conduit 3 (non-pipe end portion), that is, the first sleeve portion 312 is still in a state of being enlarged by the reduced diameter portion 56 to ensure that the two are tightly sealed. The second sleeve portion 311 is sleeved outside the expansion portion 55 and is tightly attached to the outer wall of the expansion portion 55.

[0057] In order to form an effective physical hooking structure, the length of the reduced diameter portion 56 is greater than one third of the inner diameter of the transmission conduit 3, that is, L≥D / 3, where L is the length of the reduced diameter portion 56 and D is the inner diameter of the transmission conduit 3 (in a natural state without sleeves). For example, when the inner diameter of the transmission conduit 3 is 6 mm, the length of the reduced diameter portion 56 is greater than 2 mm.

[0058] The expansion portion 55 is a cylindrical or conical structure. Fig.12 As shown, the drainage bag connector 5 may have a plurality of vertical steps 54 to form a multi-level hooking structure to ensure the connection strength between the transmission catheter 3 and the corresponding drainage bag connector 5. Furthermore, the expansion portion 55 is provided with 1, 2, or 3, and the reduction portion 56 is provided with 1, 2, or 3. Fig.10 In the illustrated embodiment, there are two vertical steps 54 (54a, 54b), two expansion parts 55 (55a, 55b), and two reduced diameter parts 56 (56a, 56b), and the transmission conduit 3 is sleeved on the vertical steps 54 (54a, 54b), the expansion parts 55 (55a, 55b), and the reduced diameter parts 56 (56a, 56b) to form a secondary hooking structure.

[0059] In the existing connection process that lacks the wing 52, it is easy to produce seam gaps when the two bag films 611 are connected on both sides of the joint of the single tube body, especially at the connection position of the bag films 611, which leads to a higher defective rate. This requires that the welding position of the joint of the single tube structure is very precise to avoid the generation of seam gaps and ensure that the two bag films 611 and the single tube form a complete circular sealing structure.

[0060] like Figures 4 to 8 As shown, the drainage bag connector 5 includes a main body tube 51 and a wing 52 arranged on the side wall of the main body tube 51. The wing 52 is integrally arranged on the main body tube 51, and is integrally formed with the main body tube 51 by injection molding. The bag connection end 61 has a relatively connected bag opening film 611. The main body tube 51 and the wing 52 are fixedly clamped between two bag opening films 611a and 611b. The wing 52 is laid flat between the two bag opening films 611a and 611b. The wing 52 extends in a radial direction. The wing 52 is laid flat between the two bag opening films 611 so that the two bag opening films 611 are distributed on both sides of the wing 52 in a mirror-symmetrical manner, thereby ensuring the welding sealing quality.

[0061] In order to form a better connection quality, the connecting sheet 521 has two opposite welding planes 527. When the wing 52 is laid flat between the two bag films 611a and 611b, the bag films 611 can be directly attached to the welding planes 527, and the two melt during welding to form a connecting weld. The connecting sheet 521 provides a welding plane 527 instead of an uneven welding surface. This can adapt to the thin sheet characteristics of the connecting sheet 521 itself. It can be directly fused with the bag film 611 by attaching during the welding process, and it is easy to manufacture. The welding plane 527 can be as follows: Figure 7 The inclined plane shown can also be Figure 7 The vertical plane shown.

[0062] The bag connection end 61 and the first connection end 502 of the drainage bag connector 5 can be welded by power frequency pulse welding (also known as power frequency heating welding). With the presence of the wing 52, the drainage bag connector 5 is located between the two bag opening films 611 and then welded once to achieve a disposable drainage bag seal and a fixed connection between the liquid storage bag 6 and the drainage bag connector 5. The sealing strip 65 that seals the bag connection end 61 is formed by welding.

[0063] like Fig. 9 , Fig.10 As shown, the wing 52 is partially melted and integrated with the film layer during welding, and then the wing 52 has a fusion portion 525 fused with the bag opening film 611. The wing 52 ( Fig.10 The connecting sheet 5211 in the embodiment is compared with the wing portion 52 ( Fig.10 The area or radial length of the connecting sheet 5212 in the middle is reduced. During the welding process, the wing 52 will lose some area, and the lost area of ​​the wing 52 will melt with the bag opening film 611 to form an integrated structure, which not only improves the connection area between the disposable drainage bag and the drainage bag connector 5 as a whole, but also ensures the bonding strength between the two, ensures the connection stability between the drainage bag connector 5 and the disposable drainage bag, and will not cause the problem of falling off. Fig.10 It can be seen from the diagram that the area or radial length of the connection sheet 5211 retained after welding is reduced compared to the connection sheet 5212 in the unconnected state.

[0064] The drainage bag connector 5 of this embodiment is provided with a wing 52, and two bag opening films 611a, 611b are covered on the main body tube 51 and span the main body tube 51, and the wings 52 are covered on both sides of the main body tube 51. Even if there is a docking gap between the two bag opening films 611a, 611b, the corresponding docking gap can be filled by the existence of the wing 52. Of course, because of the existence of the wing 52, the two bag opening films 611 do not need to be tightly docked on one side of the main body tube 51, and they can be welded by keeping them close to the surface of the wing 52. In this way, the docking position requirements for the entire drainage bag connector 5 are lower, and a higher yield can be obtained, and correspondingly, the welding and sealing quality is higher.

[0065] In this embodiment, the wing 52 includes connecting sheets 521 (521a, 521b) distributed on both sides of the main body tube 51, and the connecting sheets 521 are in a sheet structure. In the non-assembled state, the connecting sheets 521a and 521b are symmetrically distributed on both sides of the main body tube 51. The thickness of the connecting sheet 521 is 0.01-1.5 mm, and the length along the radial direction is 1-10 mm. The length L1 of the connecting sheet 521 along the length direction H of the main body tube is 1-10 mm, and preferably, the length L1 is 3-8 mm. Among them, there can be more than 2 connecting sheets 521, which are symmetrically distributed. The main body tube 51 is provided with two or more wing portions 52 along the length direction H thereof. Preferably, the connecting sheets 521 of the two wing portions 52 have the same shape. The connecting sheet 521 has an inner end connected to the main body tube 51 and an outer end away from the main body tube 51 . To fill the joint gap of the bag opening film 611 , the thickness of the connecting sheet 521 gradually decreases from the inner end to the outer end.

[0066] In this embodiment, the shape of the connecting sheet (longitudinal section, Figure 5 The cross-section in the view shown in FIG. 5 is a rectangle. The connecting sheet 521 has various shapes. For example, in other Figure 8 In the embodiments shown in a, b, c, and d, the outer edge of the connecting sheet 521 may be serrated. In this case, the outer end of the connecting sheet 521 is provided with convex portions and concave portions arranged alternately along the length direction H of the main tube. The convex portions and concave portions may be arranged alternately at equal intervals or irregularly. Each convex portion and concave portion may be the same or different. Of course, it is preferred that the convex portions and concave portions have the same shape. Similarly, the cross-sectional shapes of the connecting sheets 521 of different wing portions 52 may also be different, such as Figure 7 As shown, the cross-section of the connecting sheet 521 is a triangular spike shape, a rectangle, an irregular shape, etc., and the present application does not impose any limitation thereto.

[0067] In a disposable drainage bag, if a smooth main body tube is directly welded to the bag connection end 61, part of the outer wall of the main body tube melts during the welding process and fuses with the bag mouth film 611 of the bag connection end 61, and the melted part of the main body tube material easily overflows to form undesirable protruding foreign matter, which affects the welding quality on the inner side of the bag mouth film 611 and causes poor sealing.

[0068] like Figure 5 As shown, in order to ensure the connection quality between the first connection end 502 and the bag connection end 61, the first connection end 502 is further provided with a connection protrusion 58 on the outer wall of the main body tube 5151, and the connection protrusion 58 protrudes from the outer wall surface of the main body tube 51. The width W2 of the connection protrusion 58 along the length direction H of the main body tube is 0.5mm to 2mm. The height of the connection protrusion 58 protruding from the outer wall surface of the main body tube 51 is 0.05mm to 1mm. The connection protrusion 58 is distributed between the connection sheets 521 on both sides of the main body tube 51, and one end of the connection protrusion 58 extends continuously from one connection sheet 521a to another connection sheet 521b. With the connection sheet 521 as the symmetrical interface, the connection protrusion 58 is distributed on both sides of the connection sheet 521 in mirror symmetry.

[0069] Specifically, the outer wall area of ​​the main body tube 51 corresponding to the wing 52 is the connection area, and the length of the connection area along the length direction H is equal to the length of the wing 52 along the length direction H, both of which are L1. Two or more connecting protrusions 58 are arranged and distributed in the connection area along the length direction H, and the interval between two adjacent connecting protrusions 58 is 0.5mm to 2mm. A filling groove 585 is formed between two adjacent connecting protrusions 58. Among the multiple connecting protrusions 58, one connecting protrusion 58 is aligned with one side edge of the connecting sheet 521, and the other connecting protrusion 58 is aligned with the other side edge of the connecting sheet 521. In the embodiment with multiple wing portions 52 on the main body tube 51, as Figure 3 As shown, the main body tube 51 has two wings 52 (two pairs of connecting sheets 521 ), and correspondingly, the main body tube 51 has two connecting areas correspondingly provided with connecting protruding rings 58 .

[0070] By providing connecting convex rings 58 arranged at intervals and forming filling grooves 585 between the connecting convex rings 58, the connecting convex rings 58 are first melted and overflow to the sides into the filling grooves 585 during the welding process. In this way, it is difficult to form protruding foreign objects in the connection area to affect the welding quality. The height of the connecting convex ring 58 is gradually reduced under high-temperature welding, and gradually becomes flush with the overflow filling grooves 585 to form a flat joining surface, which is welded and fused with the bag mouth film 611 to form a connection structure with better welding quality. This connection structure can reduce the welding accuracy requirements for the drainage bag joint 5 and the welding head, provide a connection structure with better quality, and reduce the difficulty of the processing and manufacturing process.

[0071] like Figures 1 to 3As shown, the bag connection end 61 has at least one welding strip 570 for welding the bag opening film 611 relative to each other; the number of the wings 52 is equal to the number of welding strips 570, and they are aligned one by one in the width direction of the disposable drainage bag. The welding strips 570 are arranged from the disposable drainage bag in the width (facing the Figure 3 The bag connection end 61 and the drainage bag connector 5 are welded to form the welding strip 570. The width W1 of the welding strip 570 in the length direction H of the main body tube 51 is 0.3 to 1 times the length L1 of the connecting sheet 521. Preferably, the width W1 of the welding strip 570 in the length direction H of the main body tube 51 is equal to the length L1 of the connecting sheet 521, and of course, the two are also equal to the length of the connecting area along the length direction H.

[0072] On the disposable drainage bag, after welding, the connecting protruding ring 58 is roughly flush with the filling groove 585, forming a welding surface that is roughly flat with the bag opening film, and then the welding strip 570 on the main body tube 51 is a continuous weld along the length direction H, and no interval welds are formed due to the spaced connecting protruding rings 58, forming a connection structure with excellent sealing performance on the small-sized drainage bag connector 5. Similarly, the welding strip 570 on the connecting sheet is also a continuous weld along the length direction H.

[0073] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is set forth to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in the specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly set forth in the specification in a similar manner.

[0074] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0075] It should be understood that the above description is for illustration and not for limitation. By reading the above description, many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by these claims. For the purpose of comprehensiveness, all articles and references, including the disclosures of patent applications and announcements, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to abandon the subject matter, nor should it be considered that the inventor has not considered the subject matter as part of the disclosed utility model subject matter.

Claims

1. A drainage bag connector, characterized in that: The drainage bag connector is an injection-molded integral structure, and has a first connection end and a second connection end along its length direction; the first connection end is used to fix the connection to the liquid storage bag, and the second connection end is used to fix the connection to the transmission catheter; The first connecting end comprises a longitudinally extending main body tube and a wing portion integrally arranged on the outer side wall of the main body tube; the wing portion comprises connecting sheets symmetrically arranged on both sides of the main body tube, and the connecting sheets have two opposite welding planes.

2. The drainage bag connector according to claim 1, characterized in that: The outer wall of the main body tube is also provided with two or more connecting protruding rings arranged along the length direction; the connecting protruding rings protrude from the outer wall surface of the main body tube; and a filling groove is formed between two adjacent connecting protruding rings.

3. The drainage bag connector according to claim 2, characterized in that: The width of the connecting protruding ring along the length direction of the main body tube is between 0.5 mm and 2 mm; the height of the connecting protruding ring protruding from the outer wall surface of the main body tube is between 0.05 mm and 1 mm.

4. The drainage bag connector according to claim 2, characterized in that: The connecting protruding ring is distributed between the connecting thin sheets on both sides of the main body tube, and one end of the connecting protruding ring continuously extends from one connecting thin sheet to another connecting thin sheet.

5. The drainage bag connector according to claim 1, characterized in that: The main body tube is provided with two or more wing parts in the length direction thereof; the connecting sheets of the two wing parts have the same shape.

6. The drainage bag connector according to claim 5, characterized in that: The spacing distance between two adjacent wing portions is between 3 mm and 15 mm.

7. The drainage bag connector according to claim 1, characterized in that: The thickness of the connecting sheet is 0.01-1.5 mm, and the length in the radial direction is 0.5-10 mm; the length of the connecting sheet along the length direction of the main body tube is 1 mm-10 mm.

8. The drainage bag connector according to claim 1, characterized in that: The connecting sheet has an inner end connected to the main body tube and an outer end away from the main body tube; the thickness of the connecting sheet gradually decreases from the inner end to the outer end.

9. The drainage bag connector according to claim 8, characterized in that: The outer end is provided with convex parts and concave parts which are arranged alternately along the length direction of the main body tube.

10. A disposable drainage bag, characterized in that: include: A fluid storage bag for collecting the discharged drainage fluid; The drainage bag connector according to any one of claims 1 to 9, wherein the first connecting end of the drainage bag connector is fixedly connected to the liquid storage bag; The transmission catheter has one end connected to a connecting joint and the other end fixedly sleeved outside the second connecting end of the drainage bag joint.

11. The disposable drainage bag according to claim 10, characterized in that: The bag connecting end of the liquid storage bag has relatively connected bag opening films; the first connecting end and the wing portion are welded between the bag opening films, and the connecting sheet is laid flat between the two bag opening films.

12. The disposable drainage bag according to claim 11, characterized in that: The bag connecting end has at least one welding strip for welding the bag opening membrane relative to each other; the number of the wing parts is equal to the number of the welding strips, and they are aligned one by one in the width direction of the liquid storage bag.

13. The disposable drainage bag according to claim 10, characterized in that: One end of the transmission conduit is non-adhesively fitted onto the second connection end.

14. The disposable drainage bag according to claim 10, characterized in that: The second connection end is provided with at least one vertical step facing the first connection end; the vertical step is fixedly sleeved inside the transmission conduit.

15. The disposable drainage bag according to claim 14, characterized in that: The second connecting end is provided with a reduced diameter portion and an expanded portion; the reduced diameter portion is located on a side of the expanded portion close to the first connecting end, and an annular interface between the reduced diameter portion and the expanded portion forms the vertical step.

16. The disposable drainage bag according to claim 15, characterized in that: The length of the reduced diameter portion is greater than one third of the inner diameter of the transmission conduit.

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