A catheter connection device

Abstract

The utility model relates to a kind of conduit connecting devices, including connector, the diameter of the both ends of the central hole of connector is big, the diameter of middle is small, first conduit head and second conduit head are inserted in the both ends of connector, the inner end of first conduit head and second conduit head respectively extends into the middle of central hole and is tightly matched with the hole wall of central hole, the both ends of the central hole of connector are all screw set with threaded sleeve, the inner hole of two threaded sleeves is respectively tightly matched with first conduit head and second conduit head.The utility model provides a new medical conduit connecting mode, and the connecting mode structure is simple, and it is convenient to operate.

Description

Technical Field

[0001] This utility model relates to a catheter connection device, which belongs to the category of medical devices. Background Technology

[0002] Medical catheters are thin tubes made of medical-grade materials and have a wide range of applications in the medical field. Common medical catheters include infusion catheters, hemodialysis catheters, angiography catheters, catheters for endovascular interventional therapy, gastrointestinal catheters, respiratory catheters, urinary system catheters, nervous system catheters, and surgical drainage tubes. When using medical catheters, it is usually necessary to connect different medical catheters together.

[0003] In existing technologies, adhesives are commonly used to connect medical catheters. This method is convenient for connection but inconvenient for removal. It can connect different medical catheters together, but it is inconvenient to separate them when the connection is no longer needed. Existing technologies also use medical catheter connectors to connect medical catheters, but existing connectors have complex structures. Utility Model Content

[0004] The purpose of this invention is to provide a catheter connection device to solve the problem of complex structures in existing medical catheter connectors. This invention provides a new method for connecting medical catheters.

[0005] To solve the above problems, the catheter connection device involved in this utility model adopts the following technical solution: a catheter connection device, including a connector, the diameter of the two ends of the central hole of the connector is larger than the diameter in the middle, a first catheter head and a second catheter head are inserted into the two ends of the connector, the inner ends of the first catheter head and the second catheter head respectively extend into the middle of the central hole and are tightly fitted with the hole wall of the central hole, and threaded sleeves are threaded on both ends of the central hole of the connector, and the inner holes of the two threaded sleeves are tightly fitted with the first catheter head and the second catheter head respectively.

[0006] The middle part of the central hole is divided into two conical surfaces, and the outer end of the conical surface is a flared end.

[0007] The inner wall of the threaded sleeve is tapered, and the smaller diameter end of the tapered hole wall of the threaded sleeve extends into the connector.

[0008] The portion of the threaded sleeve that extends into the central hole has U-shaped notches on its peripheral wall, with the opening of the U-shaped notches located on the end face of the threaded sleeve.

[0009] The inner ends of the first and second catheter tips of this invention extend into the center of the central hole and are tightly fitted with the hole wall. Both ends of the central hole of the connector are threaded with threaded sleeves, and the inner holes of the two threaded sleeves are tightly fitted with the first and second catheter tips, respectively. This invention can tightly connect the first and second catheter tips together by sequentially fitting the central hole wall with the first and second catheter tips and by fitting the threaded sleeves with the first and second catheter tips. To separate the first and second catheter tips, simply screw the threaded sleeve towards the end furthest from the central hole, and then manually pull out the first and second catheter tips. The structure is simple and the operation is convenient. This invention also provides a new method for connecting medical catheters. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 for Figure 1 The left view; Figure 3 for Figure 2 Schematic diagram of AA section in the middle; Figure 4 for Figure 1 A schematic diagram of the connector structure in the diagram; Figure 5 for Figure 4 The left view; Figure 6 for Figure 5 Schematic diagram of the BB cross section in the middle; Figure 7 for Figure 1 A schematic diagram of the threaded sleeve in the diagram.

[0011] The diagram is labeled as follows: 1. Connector, 2. Large diameter section, 3. Small diameter section, 4. First guide tube head, 5. Second guide tube head, 6. Threaded sleeve, 7. U-shaped notch. Detailed Implementation

[0012] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0013] Specific embodiments of the catheter connection device involved in this utility model are described below. Figures 1-7 The connector 1 is hollow and has a central hole with a larger diameter at both ends and a smaller diameter in the middle. The larger diameter section is called the large-diameter section 2, and the smaller diameter section is called the small-diameter section 3. The small-diameter section 3 is located in the middle of the connector 1, and the two large-diameter sections 2 are located at the left and right ends of the small-diameter section 3, respectively. A first catheter head 4 and a second catheter head 5 are inserted into both ends of the connector 1. The inner ends of the first catheter head 4 and the second catheter head 5 extend into the middle of the central hole and fit tightly against the hole wall to achieve a seal. The ends of the tube head 5 are tightly fitted with the bore walls of the small diameter section 3, thus connecting the first guide tube head 4 and the second guide tube head 5 together with the connector 1. Both ends of the central hole of the connector 1 are threaded with threaded sleeves 6, which are screwed into the two large diameter sections 2 respectively. Tightening the threaded sleeves 6 fixes them in the connector 1. The inner holes of the two threaded sleeves 6 are tightly fitted with the first guide tube head 4 and the second guide tube head 5 respectively. Thus, the parts of the first guide tube head 4 and the second guide tube head 5 near their ends are tightly fitted with the inner holes of the two threaded sleeves 6, further improving the firmness of the connection between the first guide tube head 4 and the second guide tube head 5.

[0014] In use, first loosen the two threaded sleeves 6, and insert the first guide head 4 and the second guide head 5 into the central hole of the connector 1 through the two threaded sleeves 6 respectively, so that the ends of the first guide head 4 and the second guide head 5 extend into the small-diameter section 3 of the central hole. The first guide head 4 and the second guide head 5 are connected together by the connector 1 through a tight fit between the ends of the first guide head 4 and the wall of the small-diameter section 3. Next, tighten the two threaded sleeves 6, so that the portions of the first guide head 4 and the second guide head 5 near their ends are tightly fitted into the inner holes of the two threaded sleeves 6, thus connecting the first guide head 4 and the second guide head 5 more tightly. To separate the first guide head 4 and the second guide head 5, loosen the threaded sleeves 6 and pull the first guide head 4 and / or the second guide head 5 out of the central hole of the connector 1.

[0015] Specifically, the central hole is divided into two conical sections in the middle, which bisect the small-diameter section 3. The outer end of each conical section is a flared end, and the opposite end is a constricted end. This can be understood as the small-diameter section 3 being divided into two symmetrical conical holes, with larger radii at both ends and smaller radii in the middle, exhibiting a constricting tendency from both ends towards the middle. Thus, by inserting the first guide head 4 and / or the second guide head 5 into the connector 1 and forcefully pushing them towards the middle of the central hole, bringing the ends of the first guide head 4 and / or the second guide head 5 as close as possible to the constricted end of the conical surface, a more secure and tight fit between the first guide head 4 and / or the second guide head 5 and the connector 1 can be achieved. Furthermore, when it is necessary to pull out the first catheter head 4 and / or the second catheter head 5 from the connector 1, a certain force is applied to pull the first catheter head 4 and / or the second catheter head 5 away from the connector 1. When the ends of the first catheter head 4 and / or the second catheter head 5 leave the constricted end of the conical surface, the friction between the outer wall of the end of the first catheter head 4 and / or the second catheter head 5 and the inner wall of the small diameter section 3 will gradually decrease. It is not necessary to continuously apply too much force to pull out the first catheter head 4 and / or the second catheter head 5, which saves time and effort and is convenient to operate.

[0016] Specifically, the inner wall of the threaded sleeve 6 is tapered, and the smaller diameter end of the tapered hole of the threaded sleeve 6 extends into the connector 1. That is, the end of the threaded sleeve 6 that extends into the connector 1 is the constricted end, and the end that extends out of the connector 1 is the flared end. In this way, when the first guide head 4 and the second guide head 5 are connected together by the connector 1, the constricted end of the threaded sleeve 6 fits tightly with the first guide head 4 and the second guide head 5, improving the tightness of the fit. When it is necessary to pull out the first guide head 4 and / or the second guide head 5 from the connector 1, a certain force is applied to pull the first guide head 4 and / or the second guide head 5 away from the connector 1. After the end of the first guide head 4 and / or the second guide head 5 passes through the constricted end of the threaded sleeve 6, it is not necessary to continuously apply too much force to pull out the first guide head 4 and / or the second guide head 5, which saves time and effort and is convenient to operate.

[0017] Specifically, the peripheral wall of the portion of the threaded sleeve 6 that extends into the central hole is provided with a U-shaped notch 7, the opening of which is located on the end face of the threaded sleeve 6. When the first guide head 4 and / or the second guide head 5 are inserted into the connector 1 through the threaded sleeve 6, the outer wall of the first guide head 4 and / or the second guide head 5 presses against the inner wall of the threaded sleeve 6, causing the U-shaped notch 7 to expand, facilitating the insertion of the first guide head 4 and / or the second guide head 5 and positioning the two connected together. When the first guide head 4 and / or the second guide head 5 are pulled out of the connector 1, the outer wall of the first guide head 4 and / or the second guide head 5 rubs against the inner wall of the threaded sleeve 6, causing the U-shaped notch 7 to contract. A slightly larger force is required to pull out the first guide head 4 and / or the second guide head 5. Therefore, the U-shaped notch 7 also serves to prevent accidental removal, preventing the first guide head 4 and / or the second guide head 5 from being accidentally knocked out of the connector 1 during use.

[0018] In the above embodiment, the middle part of the central hole is divided into two conical surfaces, and the outer end of the conical surface is a flared end. This is an optimized technical solution. In other embodiments, the middle part of the central hole can also be a cylindrical hole with the same radius everywhere.

[0019] In the above embodiment, the inner hole wall of the threaded sleeve is tapered, and the small-diameter end of the tapered hole wall of the threaded sleeve extends into the connector. This is an optimized technical solution. In other embodiments, the inner hole wall of the threaded sleeve can also be cylindrical with the same radius everywhere.

[0020] In the above embodiment, a U-shaped notch is provided on the peripheral wall of the portion of the threaded sleeve that extends into the central hole. This is an optimized technical solution. In other embodiments, the U-shaped notch may not be provided, but instead, anti-slip textures may be provided on the inner wall of the portion of the threaded sleeve that extends into the central hole.

[0021] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of this utility model. Any equivalent substitutions and modifications or partial substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A conduit connection device, characterized in that, The connector includes a central hole with a larger diameter at both ends and a smaller diameter in the middle. A first guide tube and a second guide tube are inserted into both ends of the connector. The inner ends of the first guide tube and the second guide tube extend into the middle of the central hole and are tightly fitted with the hole wall of the central hole. Threaded sleeves are screwed onto both ends of the central hole of the connector, and the inner holes of the two threaded sleeves are tightly fitted with the first guide tube and the second guide tube, respectively.

2. The catheter connection device according to claim 1, characterized in that, The middle part of the central hole is divided into two conical surfaces, and the outer end of the conical surface is a flared end.

3. The catheter connection device according to claim 2, characterized in that, The inner wall of the threaded sleeve is tapered, and the smaller diameter end of the tapered hole wall of the threaded sleeve extends into the connector.

4. The catheter connection device according to claim 3, characterized in that, The portion of the threaded sleeve that extends into the central hole has U-shaped notches on its peripheral wall, with the opening of the U-shaped notches located on the end face of the threaded sleeve.

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