Stay wire structure of medical catheter

Abstract

The utility model discloses a medical catheter's stay wire structure relates to medical catheter field, including main catheter body, the one end of said main catheter body is provided with the end clamping groove, the inside edge of end clamping groove is connected with the metal blocking ring in clamping, the side edge of metal blocking ring is evenly inserted with the fixed screw rod, the fixed screw rod is fixed in the end clamping groove. A connecting wire is horizontally embedded in the inner side wall of the main catheter body, movable sleeves are horizontally and symmetrically embedded in the inner side wall of the main catheter body, supporting metal strips are evenly embedded in the inner side wall of the main catheter body, penetrating through holes are symmetrically formed in the side edges of the metal blocking ring, multilateral clamping grooves are symmetrically formed in one side edge of the metal blocking ring, and clamping grooves are formed in the other side edge of the metal blocking ring. A polygonal inserting block is fixedly arranged at one end of the connecting wire, an annular blocking and clamping structure is adopted so that the connecting position of the end cannot fall off during pulling, follow-up use cannot be affected, meanwhile, an inner supporting structure is reinforced so that the catheter can have certain supporting force during use, and the supporting effect of pulling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical catheter technology, specifically a pull-wire structure for a medical catheter. Background Technology

[0002] Medical catheters often require bending control during use. This bending control is generally achieved by tightening and loosening the pull cord located in the distal bending section of the corresponding catheter body. The pull cords can be installed in pairs, located on opposite sides of the distal bending section radially. Tightening one pull cord and loosening the other will cause the distal bending section to bend towards the tightened side. One end of the pull cord is glued to the distal end of the distal bending section to form a complete catheter for use.

[0003] The current adhesive-based fixing method for conduits makes the wire fixation ineffective, causing them to fall off when pulled, rendering the entire conduit unusable. Furthermore, the wire connection cannot achieve a more effective and stable installation, affecting the stability of subsequent conduit use. Utility Model Content

[0004] The purpose of this invention is to provide a pull-string structure for medical catheters, in order to solve the problems mentioned in the background art, where the current adhesive-based fixing method for catheters results in poor fixation of the pull-string, causing it to fall off when pulled, rendering the entire catheter unusable, and failing to achieve a more effective and stable installation effect in the pull-string connection, thus affecting the stability of subsequent catheter use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pull-wire structure for a medical catheter includes a main tube body. One end of the main tube body has an end-clamping groove. A metal blocking ring is clamped to the inner side of the end-clamping groove. Fixing screws are evenly inserted into the side of the metal blocking ring. A connecting wire is horizontally embedded in the inner wall of the main tube body. A movable sleeve is horizontally and symmetrically embedded in the inner wall of the main tube body. Supporting metal strips are evenly embedded in the inner wall of the main tube body. Through holes are symmetrically opened on the side of the metal blocking ring. Polygonal grooves are symmetrically opened on one side of the metal blocking ring. A polygonal insert is fixedly provided at one end of the connecting wire. An inner clamping groove is opened on the inner side of the polygonal insert. An end-clamping block is fixedly welded to one end of the connecting wire. An end screw hole is opened at the end of the polygonal insert away from the connecting wire.

[0007] In a preferred embodiment of this utility model, the end-locking groove is opened at one open end of the main tube body, and the end-locking groove is opened in a ring shape, with the depth of the end-locking groove being consistent with the thickness of the metal blocking ring.

[0008] In a preferred embodiment of this utility model: one side of the metal blocking ring is flush with one end of the main tube body, there are four fixing screws, and the four fixing screws are all inserted into the inner side of the through hole in a one-to-one correspondence, and the extension end of the fixing screw is inserted into the center of the inner side of the polygonal slot.

[0009] In a preferred embodiment of this utility model, the connecting wire is made of high-strength fine steel wire and is horizontally inserted into the inner side of the movable sleeve. The movable sleeve is made of soft rubber material and the inner wall of the movable sleeve is made of smooth material.

[0010] As a preferred embodiment of the present invention: there are multiple supporting metal strips, and the multiple supporting metal strips are arranged in parallel at equal intervals. The multiple supporting metal strips are arranged in a ring on the inner side wall of the main tube body. The extension end of the through hole extends into the interior of the polygonal slot to maintain a continuous connection. The polygonal slot is polygonal in shape.

[0011] In a preferred embodiment of this utility model: the polygonal insert has the same shape as the polygonal slot, and each polygonal insert is inserted into the inner side of the polygonal slot. One end of the connecting wire is inserted into the inner side of the polygonal insert, the end locking block is locked into the inner side of the inner locking groove, the end screw hole is opened at the center of one end of the polygonal insert, and the extension end of the fixing screw is threadedly fixedly connected to the inner side of the end screw hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention involves horizontally inserting multiple connecting wires into the interior of a movable sleeve. The smooth inner wall of the sleeve allows for smoother, unobstructed movement of the connecting wires. A polygonal insert at one end is then inserted into a polygonal slot. A fixing screw passes through the through-hole, and the extended end is threaded into the end screw hole for secure installation. A metal retaining ring is then embedded in the end slot, completing the overall installation. In subsequent use, when extending and inserting the main tube at one end, multiple directions are used... After the connecting wire is pulled, the main tube body flips in the direction of the pull, and the connecting wire in the other direction is released, allowing the main tube body to bend. The internal support metal strip increases the overall rigidity of the main tube body, preventing it from deforming under pressure due to its softness. The metal blocking ring prevents the connecting wire from detaching and falling off. The ring-shaped blocking structure prevents the end connection from falling off during pulling, thus ensuring it won't affect subsequent use. At the same time, the reinforced internal support structure provides the tube with sufficient support during use, meeting the support requirements for pulling. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 A three-dimensional structural diagram of a drawstring structure for a medical catheter;

[0016] Figure 2 A three-dimensional cross-sectional schematic diagram showing the connection details of a pull wire structure for a medical catheter;

[0017] Figure 3 A schematic diagram showing the three-dimensional connection details of the metal blocking ring in the drawstring structure of a medical catheter;

[0018] Figure 4 A structural schematic diagram showing the connection details of a metal blocking ring in the front cross-section of a pull wire structure for a medical catheter;

[0019] Figure 5 This is a structural schematic diagram showing the front cross-sectional view of the connection details of a polygonal insert block in the drawstring structure of a medical catheter.

[0020] In the diagram: 1. Main tube body; 2. End clamping groove; 3. Metal blocking ring; 4. Fixing screw; 5. Connecting wire; 6. Movable sleeve; 7. Supporting metal strip; 8. Through hole; 9. Polygonal clamping groove; 10. Polygonal insert; 11. Inner clamping groove; 12. End clamping block; 13. End screw hole. Detailed Implementation

[0021] Please see Figure 1-5 In this embodiment of the present invention, a pull-wire structure for a medical catheter includes a main tube body 1. One end of the main tube body 1 has an end-clamping groove 2, which is located at an open end of the main tube body 1 and is annular in shape. The depth of the end-clamping groove 2 is consistent with the thickness of a metal blocking ring 3. A metal blocking ring 3 is clamped to the inner side of the end-clamping groove 2. Fixing screws 4 are evenly inserted into the side of the metal blocking ring 3. One side of the metal blocking ring 3 is flush with one end of the main tube body 1. There are four fixing screws 4. All components are connected in a one-to-one through-hole 8. The extension end of the fixing screw 4 is inserted into the center of the polygonal slot 9. A connecting wire 5 is horizontally embedded in the inner wall of the main tube 1. A movable sleeve 6 is horizontally and symmetrically embedded in the inner wall of the main tube 1. The connecting wire 5 is made of high-strength fine steel wire and is horizontally inserted into the inner side of the movable sleeve 6. The movable sleeve 6 is made of soft rubber and has a smooth inner wall. Support metal is evenly embedded in the inner wall of the main tube 1. The metal blocking ring 3 has symmetrical through holes 8 on its side and polygonal slots 9 symmetrically opened on one side of the metal blocking ring 3. Multiple supporting metal strips 7 are arranged parallel to each other at equal intervals, forming a ring on the inner wall of the main tube 1. The extension end of the through hole 8 extends into the polygonal slot 9 to maintain connection. The polygonal slot 9 is polygonal in shape. One end of the connecting wire 5 is fixedly fitted with a polygonal insert 10. The inner wall of the polygonal insert 10 has an inner locking groove 11 for connection. One end of the wire 5 is fixedly welded with an end clamping block 12. The polygonal plug 10 has an end screw hole 13 at the end away from the connecting wire 5. The polygonal plug 10 adopts the same shape as the polygonal slot 9, and each polygonal plug 10 is inserted into the inner side of the polygonal slot 9. One end of the connecting wire 5 is inserted into the inner side of the polygonal plug 10. The end clamping block 12 is clamped into the inner side of the inner clamping groove 11. The end screw hole 13 is opened at the center of one end of the polygonal plug 10, and the extension end of the fixing screw 4 is threadedly fixedly connected to the inner side of the end screw hole 13.

[0022] The working principle of this utility model is as follows:

[0023] Multiple connecting wires 5 are horizontally inserted into the interior of the movable sleeve 6. Because the inner wall of the movable sleeve 6 is made of a smooth material, the connecting wires 5 move smoothly and without resistance when pulled in and out of the sleeve. Then, one end of the polygonal insert 10 is inserted into the polygonal slot 9. After the fixing screw 4 passes through the through hole 8, the extended end is threaded and fixed inside the end screw hole 13, thus securing the polygonal insert 10. Finally, the metal retaining ring 3 is fixedly embedded inside the end slot 2. The installation process is integrated. During subsequent use, when one end of the main tube 1 is extended and inserted, the main tube 1 is pulled in the direction of the pull by the multi-directional connecting wires 5. This causes the main tube 1 to rotate in the direction of the pull, while the connecting wires 5 in the other directions are released, allowing the main tube 1 to bend. The internal support metal strip 7 increases the overall rigidity of the main tube 1, preventing it from deforming and becoming unable to withstand force when squeezed. The metal blocking ring 3 prevents the connecting wires 5 from detaching and falling off.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drawstring structure for a medical catheter, comprising a main tube body (1), characterized in that, One end of the main tube (1) is provided with an end clamping groove (2), and a metal blocking ring (3) is clamped on the inner side of the end clamping groove (2). Fixed screws (4) are evenly inserted on the side of the metal blocking ring (3). A connecting wire (5) is horizontally embedded in the inner wall of the main tube (1). A movable sleeve (6) is horizontally and symmetrically embedded in the inner wall of the main tube (1). A supporting metal strip (7) is evenly embedded in the inner wall of the main tube (1). A through hole (8) is symmetrically opened on the side of the metal blocking ring (3). A polygonal clamping groove (9) is symmetrically opened on one side of the metal blocking ring (3). A polygonal plug (10) is fixedly provided at one end of the connecting wire (5). An inner clamping groove (11) is opened on the inner side of the polygonal plug (10). An end clamping block (12) is fixedly welded to one end of the connecting wire (5). An end screw hole (13) is opened at the end of the polygonal plug (10) away from the connecting wire (5).

2. The drawstring structure of a medical catheter according to claim 1, characterized in that, The end-locking groove (2) is opened at one open end of the main tube body (1), and the end-locking groove (2) is opened in a ring shape. The depth of the end-locking groove (2) is set to be consistent with the thickness of the metal blocking ring (3).

3. The drawstring structure of a medical catheter according to claim 1, characterized in that, One side of the metal blocking ring (3) is flush with one end of the main tube (1). There are four fixing screws (4), and the four fixing screws (4) are all inserted into the inner side of the through hole (8) in a one-to-one correspondence. The extension end of the fixing screw (4) is inserted into the center of the inner side of the polygonal slot (9).

4. The drawstring structure of a medical catheter according to claim 1, characterized in that, The connecting wire (5) is made of high-strength fine steel wire and is horizontally inserted into the inner side of the movable sleeve (6). The movable sleeve (6) is made of soft rubber material and the inner wall of the movable sleeve (6) is made of smooth material.

5. The drawstring structure of a medical catheter according to claim 1, characterized in that, The number of the supporting metal strips (7) is multiple, and the multiple supporting metal strips (7) are arranged in parallel at equal intervals. The multiple supporting metal strips (7) are arranged in a ring on the inner side wall of the main tube body (1). The extension end of the through hole (8) extends into the interior of the polygonal slot (9) to maintain a connection. The polygonal slot (9) is polygonal in shape.

6. The drawstring structure of a medical catheter according to claim 1, characterized in that, The polygonal plug (10) adopts the same shape as the polygonal slot (9), and each polygonal plug (10) is inserted into the inner side of the polygonal slot (9) in a corresponding manner. One end of the connecting wire (5) is inserted into the inner side of the polygonal plug (10), and the end snap-fit ​​block (12) is snap-fitted into the inner side of the inner snap-fit ​​groove (11). The end screw hole (13) is opened at the center of one end of the polygonal plug (10), and the extension end of the fixing screw (4) is threaded and fixedly connected to the inner side of the end screw hole (13).

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