Locking mechanism and medical instrument coating equipment

Abstract

The utility model discloses a locking mechanism and coating equipment of a medical instrument. The locking mechanism has a first locking mode and a second locking mode and comprises a central pipe, a lock cap and a lock cylinder, the central pipe is provided with a pipe cavity and a lock groove communicated with the pipe cavity, in the first locking mode, the pipe cavity is used for allowing the first pipe body to penetrate through and can tightly hold the first pipe body, and in the second locking mode, the pipe cavity is used for allowing the second pipe body to penetrate through and can tightly hold the second pipe body. The pipe diameter of the second pipe body is smaller than that of the first pipe body; the protective sleeve and the central pipe are coaxially arranged; the central pipe is sleeved with the lock cap. And the lock cylinder can extend into the pipe cavity from the locking groove under the pushing of the lock cap in the second locking mode so as to clamp the second pipe body. The locking mechanism can lock pipe bodies with different diameters according to requirements, operation is convenient, the using number of the locking mechanism can be reduced, the structure of the device can be simplified, and production and machining are convenient.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a locking mechanism and a coating device for medical devices. Background Technology

[0002] Balloon catheter intervention has become one of the main methods for treating cardiovascular diseases worldwide. To ensure good passage of the balloon within the blood vessel, a coating is applied to the balloon and its shaft using a coating device. During coating, clamps are typically used to hold the balloon's shaft or the mandrel through which the balloon is inserted. However, clamps can only hold one shaft or one mandrel, making operation inconvenient and increasing the number of clamps required. Utility Model Content

[0003] Therefore, it is necessary to provide a coating device for a locking mechanism and a medical device to address the above-mentioned technical problems.

[0004] According to this utility model, a locking mechanism is provided, having a first locking mode and a second locking mode, the locking mechanism comprising:

[0005] The central tube has a cavity and a locking groove communicating with the cavity. In the first locking mode, the cavity is used for the first tube body to pass through and can hold the first tube body. In the second locking mode, the cavity is used for the second tube body to pass through, and the diameter of the second tube body is smaller than the diameter of the first tube body.

[0006] A locking cap, fitted onto the outside of the central tube; and

[0007] In the second locking mode, the lock cylinder can extend from the lock groove into the tube cavity under the push of the lock cap to clamp the second tube body.

[0008] The locking mechanism has a first locking mode and a second locking mode. In the first locking mode, the larger diameter first tube body, such as the rod of a balloon catheter, can be clamped by the lumen of the central tube. In the second locking mode, the smaller diameter second tube body (such as the mandrel through which the balloon catheter is inserted) can be locked into the lumen of the central tube by the cooperation of the locking core and the locking cap. The locking mechanism of this invention can lock tube bodies of different diameters as needed, which is convenient to operate, can reduce the number of locking mechanisms used, simplifies the structure of the device, and facilitates production and processing.

[0009] In one embodiment, the lumen includes a first cavity segment and a second cavity segment arranged coaxially, the first cavity segment and the second cavity segment communicating with each other, and the second cavity segment communicating perpendicularly with the locking groove and being configured as a conical hole.

[0010] In one embodiment, the angle between the generatrix of the second cavity segment and the central axis is less than or equal to 5°.

[0011] In one embodiment, a guide section is provided on the side of the second cavity that is away from the first cavity.

[0012] In one embodiment, the lock cap is screwed to the center tube, wherein, in the second locking mode, when the lock cap is rotated for assembly, the inner surface of the lock cap can push against the lock cylinder.

[0013] In one embodiment, the lock cap has a mating surface for pushing the lock cylinder, and the mating surface is a smooth surface.

[0014] In one embodiment, the outer peripheral surface of the lock cap is provided with an anti-slip portion.

[0015] In one embodiment, the lock cylinder is a ball that can slide in the lock groove.

[0016] In one embodiment, the locking mechanism further has at least one of the following features:

[0017] The locking mechanism also includes a protective sleeve, which is coaxially arranged with the central tube and connected to the locking cap;

[0018] The locking mechanism also includes a seal, which is located on the outer circumferential surface of the central tube and outside the lock cap.

[0019] According to the present invention, a coating device for a medical device is provided, comprising a coating body, a rotating mechanism and a locking mechanism as described above, wherein the rotating mechanism is rotatably disposed on the coating body and connected to the central tube of the locking mechanism.

[0020] The coating equipment for the aforementioned medical device has a locking mechanism with a first locking mode and a second locking mode. In the first locking mode, the larger diameter first tube body, such as the rod of a balloon catheter, can be clamped by the lumen of the central tube. In the second locking mode, the smaller diameter second tube body (such as the mandrel through which the balloon catheter is inserted) can be locked into the lumen of the central tube by the cooperation of the locking core and the locking cap. The locking mechanism of this invention can lock tube bodies of different diameters according to needs, which is convenient for operation, can also reduce the number of locking mechanisms used, can simplify the structure of the device, and facilitate production and processing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the locking mechanism provided in one embodiment of this application.

[0022] Figure 2 for Figure 1 An exploded view of the provided locking mechanism.

[0023] Figure 3 for Figure 1 A top view of the provided locking mechanism.

[0024] Figure 4for Figure 3 The provided locking mechanism is shown in cross-sectional view at point AA.

[0025] Figure 5 for Figure 1 A schematic diagram showing the engagement of the provided locking mechanism with the first tube body in the first locking mode.

[0026] Figure 6 for Figure 1 A schematic diagram showing the engagement of the provided locking mechanism with the second tube body in the second locking mode.

[0027] The labels in the attached diagram are explained as follows:

[0028] 10. Locking mechanism; 100. Central tube; 100a. First tube section; 100b. Second tube section; 100c. Third tube section; 110. Tube cavity; 111. First cavity section; 112. Second cavity section; 113. Guide section; 120. Lock groove; 200. Protective sleeve; 210. Receiving groove; 220. Through hole; 300. Lock cap; 300a. Mating surface; 310. Anti-slip part; 400. Lock cylinder; 500. Sealing element; A. First tube body; B. Second tube body. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] like Figures 1 to 4 As shown, one embodiment of this application provides a locking mechanism 10, which has... Figure 5 The first locking mode shown and Figure 6 The second locking mode shown includes a central tube 100, a locking cap 300, and a locking cylinder 400. The central tube 100 has a cavity 110 and a locking groove 120 communicating with the cavity 110. In the first locking mode, the cavity 110 is used for the first tube A to pass through and can hold the first tube A. In the second locking mode, the cavity 110 is used for the second tube B to pass through, and the diameter of the second tube B is smaller than the diameter of the first tube A. The locking cap 300 is sleeved on the outside of the central tube 100. In the second locking mode, the locking cylinder 400 can extend from the locking groove 120 into the cavity 110 under the push of the locking cap 300 to clamp the second tube B.

[0031] The locking mechanism 10 can be applied in the field of medical device manufacturing, for example, to clamp and fix the balloon catheter during the coating process. Of course, the locking mechanism 10 can also be applied in other related fields that require clamping different tube bodies.

[0032] The following description uses a balloon catheter as an example to illustrate the working process of the locking mechanism 10. The balloon catheter includes a rod and a balloon, with the balloon located at the distal end of the rod. It should be noted that the terms "distal" and "proximal" throughout the text are used only to indicate relative position. "Distal" refers to the end of the component that enters the patient's body first and / or is further from the operator during normal operation, while "proximal" refers to the end that enters the patient's body later and / or is closer to the operator.

[0033] Before applying the coating to the balloon catheter, the locking mechanism 10 can be installed on the coating equipment. Specifically, the central tube 100 of the locking mechanism 10 is connected to the rotating mechanism of the coating equipment. The rotating mechanism can drive the locking mechanism 10 to rotate, allowing the balloon catheter to rotate during coating, which facilitates uniform coating. The rotating mechanism also includes an air passage that blows air into the rod of the balloon catheter, inflating the balloon and facilitating coating.

[0034] When coating the balloon of the balloon catheter, first insert the proximal end of the rod (i.e., the first tube A mentioned above) into the lumen 110 of the central tube 100. The lumen 110 of the central tube 100 then holds the rod tightly, at which point the locking mechanism 10 is in the first locking mode. Then, air is blown into the rod of the balloon catheter through the air passage of the rotating mechanism to inflate the balloon, facilitating the coating process. After the balloon coating is complete, the air passage is disconnected, and the rod is pulled away from the central tube 100.

[0035] When coating the balloon catheter shaft, first insert the balloon catheter onto the mandrel, then insert the proximal end of the mandrel into the lumen 110 of the central tube 100; then adjust the locking cap 300 to push the locking cylinder 400, causing the locking cylinder 400 to extend from the locking groove 120 into the lumen 110, thereby clamping the mandrel (i.e., the second tube body B mentioned above). At this time, the locking mechanism 10 is in the second locking mode. Afterwards, coat the balloon catheter shaft. Once the shaft coating is complete, adjust the locking cap 300 to loosen the locking cylinder 400 from the mandrel, and then remove the mandrel.

[0036] The locking mechanism 10 provided in this embodiment has two locking modes: a first locking mode and a second locking mode. In the first locking mode, the larger diameter first tube body A, such as the rod of a balloon catheter, can be held in place by the lumen 110 of the central tube 100. In the second locking mode, the smaller diameter second tube body B (such as the mandrel through which the balloon catheter is inserted) can be locked in the lumen 110 of the central tube 100 by the cooperation of the locking core 400 and the locking cap 300. Therefore, the locking mechanism 10 can lock tube bodies of different diameters as needed, which is convenient for operation, reduces the number of locking mechanisms 10 used, simplifies the structure of the device, and facilitates production and processing.

[0037] The central tube 100 is used to lock the first tube A and to allow the second tube B to pass through. In one embodiment, as... Figure 2 As shown, the central tube 100 includes a first tube segment 100a, a second tube segment 100b, and a third tube segment 100c connected in sequence. The first tube segment 100a is located outside the locking cap 300 and is connected to the rotating mechanism of the coating equipment. The second tube segment 100b and the third tube segment 100c are both located inside the locking cap 300. The second tube segment 100b is connected to the locking cap 300, and the third tube segment 100c communicates with the locking groove 120.

[0038] As an example, the first pipe section 100a can be screwed to the rotating mechanism of the coating equipment, facilitating the assembly and disassembly of the locking mechanism 10. Specifically, the outer circumferential surface of the first pipe section 100a is provided with threads for screwing into the rotating mechanism.

[0039] As an example, the second pipe section 100b is screwed to the locking cap 300. Specifically, the outer circumferential surface of the second pipe section 100b is provided with threads, and the inner circumferential surface of the locking cap 300 is provided with threads that are compatible with the threads of the second pipe section 100b.

[0040] In one embodiment, such as Figure 4 As shown, the lumen 110 includes a first segment 111 and a second segment 112 coaxially arranged. The first segment 111 and the second segment 112 communicate with each other, and the second segment 112 communicates with the locking groove 120 and is designed as a conical hole. The rod of the balloon catheter has a certain degree of elasticity, and the conical hole can be used to form a tapered locking effect on the rod. After the balloon is coated, it is easy to pull the rod away from the central tube 100. As an example, the first segment 111 can penetrate the entire first tube segment 100a and a part of the second tube segment 100b near the first tube segment 100a, and the second lumen 110 can penetrate the entire third tube segment 100c and another part of the second tube segment 100b.

[0041] The diameter of the second cavity 112 is related to the direction in which the rod is pushed into the cavity 110 of the central tube 100. If we follow... Figure 4As shown, when the rod is pushed in from bottom to top, the diameter of the second cavity 112 gradually decreases from bottom to top; when the rod is pushed in from top to bottom, the diameter of the second cavity 112 gradually decreases from top to bottom.

[0042] Optionally, the angle between the generatrix of the second cavity 112 and the central axis is less than or equal to 5°, for example, 5°, 4°, 3°, 2°, 1°, etc. This setting effectively locks the balloon catheter body, ensuring it does not detach at 25 atmospheres. It should be noted that a conical surface is a curved surface formed by rotating a straight line (generatrix) around an axis that intersects it. For a conical orifice, its generatrix is ​​the corresponding portion of the straight line of rotation forming the surface of the conical orifice on the conical orifice.

[0043] Optionally, such as Figure 4 As shown, a guide section 113 is also provided on the side of the second cavity 112 away from the first cavity 111. The guide section 113 facilitates the insertion of the proximal end of the rod into the cavity 110 of the central tube 100. The aperture of the guide section 113 decreases in size along the direction closer to the second cavity 112.

[0044] like Figure 4 As shown, in some embodiments of this application, the lock cap 300 is screwed to the center tube 100. In the second locking mode, when the lock cap 300 is rotated for assembly, the inner surface of the lock cap 300 can push against the lock cylinder 400. This assembly method of the lock cap 300 and the center tube 100 allows for continuous adjustment of the length of the lock cylinder 400 extending into the lock groove 120, adjustment of the clamping force on the second tube B, and clamping of second tubes B of different sizes.

[0045] As an example, the inner circumferential surface of the lock cap 300 is provided with threads, and the outer circumferential surface of the center tube 100 is provided with threads that are compatible with the threads of the lock cap 300.

[0046] Optionally, such as Figure 4 As shown, the lock cap 300 has a mating surface 300a for pushing the lock cylinder 400, and the mating surface 300a is a smooth surface. This design allows the lock cap 300 to stably push the lock cylinder 400, preventing jamming between the lock cap 300 and the lock cylinder 400. The mating surface 300a can be a beveled surface or a convex arc surface.

[0047] Optionally, such as Figure 1 As shown, the outer peripheral surface of the lock cap 300 is provided with an anti-slip portion 310. The anti-slip portion 310 facilitates the screwing of the lock cap 300. The anti-slip portion 310 can be an anti-slip coating, an anti-slip pattern, or an anti-slip protrusion, etc. For example, multiple anti-slip protrusions are provided circumferentially on the outer peripheral surface of the lock cap 300, and each anti-slip protrusion extends axially along the lock cap 300. This application does not limit the scope of the application.

[0048] like Figure 2 As shown, in some embodiments of this application, the lock cylinder 400 is a ball that can slide in the lock groove 120. This configuration allows the lock cylinder 400 to slide smoothly in the lock groove 120 under the push of the lock cap 300, facilitating the lock cylinder 400 to press against the second tube B.

[0049] It should be noted that the lock cylinder 400 can be placed in the lock groove 120 of the central tube 100 only in the second locking mode; or it can be placed in the lock groove 120 of the central tube 100 in both the first and second locking modes. However, in this embodiment, the thread on the lock cap 300 that connects to the central tube 100 must be long enough so that even in the first locking mode, the lock cap 300 has enough threads to connect to the central tube 100, thereby ensuring the connection strength between the lock cap 300 and the central tube 100.

[0050] Optionally, the length of the lock groove 120 along the radial direction of the central tube 100 is less than the diameter of the lock cylinder 400. This arrangement allows the lock cylinder 400 to enter the cavity 110 of the central tube 100 under the push of the lock cap 300, thereby effectively compressing the second tube body B.

[0051] like Figures 1 to 4 As shown, in some embodiments of this application, the locking mechanism 10 further includes a protective sleeve 200, which is coaxially arranged with the central tube 100 and connected to the locking cap 300. During coating, the locking mechanism 10 needs to be placed in the working chamber of the coating equipment, where a light source is usually provided. Different light sources will cause different temperatures in the working chamber. When the temperature of the working chamber is high, the protective sleeve 200 can provide heat insulation protection for the uncoated balloon.

[0052] In one embodiment, such as Figure 4 As shown, the protective sleeve 200 has a receiving groove 210 and a through hole 220 communicating with the receiving groove 210. The receiving groove 210 is used to receive a part of the central tube 100, and the through hole 220 is used for the rod or mandrel to pass through. The protective sleeve 200 with this structure can reduce the axial length of the locking mechanism 10, making the structure of the locking mechanism 10 more compact.

[0053] Regarding the shape of the through hole 220, it may include a small diameter section, a transition section and a large diameter section connected in sequence. The diameter of the small diameter section is smaller than the diameter of the large diameter section. The small diameter section is close to the receiving groove 210. This application does not limit this.

[0054] like Figure 1 and Figure 4As shown, in some embodiments of this application, the locking mechanism 10 further includes a seal 500, which is disposed on the outer peripheral surface of the central tube 100 and located outside the locking cap 300. The seal 500 is disposed between the central tube 100 and the rotating mechanism of the coating equipment to seal the gap between the central tube 100 and the rotating mechanism of the coating equipment, thereby preventing gas leakage during the coating of the balloon.

[0055] Optionally, the seal 500 can be a sealing ring, such as a rubber sealing ring. Optionally, the outer peripheral surface of the first pipe segment 100a of the central pipe 100 has a groove, and the seal 500 can be placed in the groove.

[0056] On the other hand, another embodiment of this application provides a coating device for a medical device, the coating device including a coating body, a rotating mechanism and a locking mechanism 10 as described above, the rotating mechanism being rotatably disposed on the coating body and connected to the central tube 100 of the locking mechanism 10.

[0057] This coating device can coat interventional medical devices (such as balloon catheters) to improve their transcatheter mobility within blood vessels. The following description uses a balloon catheter as an example to illustrate how the locking mechanism 10 of the coating device is used:

[0058] Before applying the coating to the balloon catheter, the locking mechanism 10 can be installed on the coating equipment. Specifically, the central tube 100 of the locking mechanism 10 is connected to the rotating mechanism of the coating equipment. The rotating mechanism can drive the locking mechanism 10 to rotate, allowing the balloon catheter to rotate during coating, which facilitates uniform coating. The rotating mechanism includes an air passage that blows air into the rod of the balloon catheter, inflating the balloon and facilitating coating.

[0059] When coating the balloon of the balloon catheter, first insert the proximal end of the rod (i.e., the first tube A mentioned above) into the lumen 110 of the central tube 100. The lumen 110 of the central tube 100 then holds the rod tightly, at which point the locking mechanism 10 is in the first locking mode. Then, air is blown into the rod of the balloon catheter through the air passage of the rotating mechanism to inflate the balloon, facilitating the coating process. After the balloon coating is complete, the air passage is disconnected, and the rod is pulled away from the central tube 100.

[0060] When coating the balloon catheter shaft, first insert the balloon catheter onto the mandrel, then insert the proximal end of the mandrel into the lumen 110 of the central tube 100. Next, adjust the locking cap 300, which will push the locking cylinder 400, causing the locking cylinder 400 to extend from the locking groove 120 into the lumen 110, thereby clamping the mandrel (i.e., the second tube body B mentioned above). At this point, the locking mechanism 10 is in the second locking mode. Afterward, coat the balloon catheter shaft. Once the shaft coating is complete, adjust the locking cap 300 to loosen the locking cylinder 400 from the mandrel, and then directly pull out the mandrel.

[0061] The locking mechanism 10 provided in this embodiment has two locking modes: a first locking mode and a second locking mode. In the first locking mode, the larger diameter first tube body A, such as the rod of a balloon catheter, can be held in place by the lumen 110 of the central tube 100. In the second locking mode, the smaller diameter second tube body B (such as the mandrel through which the balloon catheter is inserted) can be locked in the lumen 110 of the central tube 100 by the cooperation of the locking core 400 and the locking cap 300. Therefore, the locking mechanism 10 can lock tube bodies of different diameters as needed, which is convenient for operation, reduces the number of locking mechanisms 10 used, simplifies the structure of the device, and facilitates production and processing.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A locking mechanism, characterized in that, Having a first locking mode and a second locking mode, the locking mechanism (10) includes: The central tube (100) has a cavity (110) and a locking groove (120) communicating with the cavity (110). In the first locking mode, the cavity (110) is used for the first tube body (A) to pass through and can hold the first tube body (A). In the second locking mode, the cavity (110) is used for the second tube body (B) to pass through, and the diameter of the second tube body (B) is smaller than the diameter of the first tube body (A). A locking cap (300) is fitted onto the outside of the central tube (100); and In the second locking mode, the lock cylinder (400) can extend from the lock groove (120) into the cavity (110) under the push of the lock cap (300) to clamp the second tube body (B).

2. The locking mechanism according to claim 1, characterized in that, The cavity (110) includes a first cavity segment (111) and a second cavity segment (112) arranged coaxially. The first cavity segment (111) communicates with the second cavity segment (112), and the second cavity segment (112) communicates perpendicularly with the locking groove (120) and is set as a conical hole.

3. The locking mechanism according to claim 2, characterized in that, The angle between the generatrix of the second cavity segment (112) and the central axis is less than or equal to 5°.

4. The locking mechanism according to claim 2, characterized in that, The second cavity (112) is further provided with a guide section (113) on the side away from the first cavity (111).

5. The locking mechanism according to claim 1, characterized in that, The lock cap (300) is screwed to the center tube (100), wherein, in the second locking mode, when the lock cap (300) is rotated for assembly, the inner surface of the lock cap (300) can push against the lock cylinder (400).

6. The locking mechanism according to claim 5, characterized in that, The lock cap (300) has a mating surface (300a) for pushing the lock cylinder (400), and the mating surface (300a) is a smooth surface.

7. The locking mechanism according to claim 5, characterized in that, The outer peripheral surface of the lock cap (300) is provided with an anti-slip part (310).

8. The locking mechanism according to claim 1, characterized in that, The lock cylinder (400) is a ball that can slide in the lock groove (120).

9. The locking mechanism according to any one of claims 1 to 8, characterized in that, The locking mechanism (10) also has at least one of the following features: The locking mechanism (10) further includes a protective sleeve (200), which is coaxially arranged with the central tube (100) and connected to the locking cap (300); The locking mechanism (10) further includes a sealing element (500), which is disposed on the outer peripheral surface of the central tube (100) and located outside the locking cap (300).

10. A coating device for a medical device, characterized in that, It includes a coating body, a rotating mechanism and a locking mechanism (10) as described in any one of claims 1 to 9, wherein the rotating mechanism is rotatably disposed on the coating body and connected to the central tube (100) of the locking mechanism (10).

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