Support loading device
By designing a support loading device and adopting an automated traction and limiting structure, the problems of existing support loading devices requiring two people to operate and the sheath tube being easily moved have been solved, thereby improving production efficiency and finished product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-27
AI Technical Summary
The existing support loading device requires two people to operate, which is cumbersome and inefficient. In addition, the sheath tube is easy to move, which affects production efficiency and finished product quality.
Design a support loading device, including an inlet sheath, a limiting structure, a loader and a drive assembly. The drive assembly drives a lead screw structure to achieve automated traction, reducing manual intervention, and a limiting structure is set on the outer periphery of the inlet sheath to prevent the sheath from moving.
It enables automated traction for single-person operation, improves production efficiency, reduces sheath movement during support loading, and enhances finished product quality.
Smart Images
Figure CN224039415U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially, a kind of support loading device. BACKGROUND
[0002] In the field of cardiovascular intervention therapy, the pre-loading of metal stents is a key process in the production of instruments. The traditional traction wire loading process widely used in the industry has a significant technical bottleneck, which requires two operators to work together to manually pull the 20mm-150mm long nickel-titanium alloy stent into the 1mm-3mm diameter sheath delivery system after pre-bending treatment using 0.1mm-0.3mm diameter high molecular traction wire (usually PTFE material). This process requires high skill and environmental conditions for the operators.
[0003] With the development of drug-eluting stents towards small caliber (≤2.25mm) and the large-scale application of bioabsorbable stents (usually PLGA material), the defects of the traditional traction loading process are amplified geometrically. Statistics show that the manual loading failure rate of stents with a diameter of less than 2.0mm has exceeded the 25% warning line, and the fragility of absorbable stents has resulted in a loading breakage rate of up to 30%. This directly leads to an increase of 15 dollars in QC cost (Quality Control cost) per stent for production enterprises, a 40% decrease in production line efficiency, and a serious restriction on the industrialization process of new stents. Secondly, during stent loading, the sheath is prone to move, affecting the stent loading efficiency and product quality.
[0004] Therefore, there is an urgent need for a stent loading device to solve the above technical problems. INVENTION CONTENTS
[0005] The utility model aims at providing a kind of stent loading device, to solve the problem that one person needs to be pulled, another person observes the loading process when using existing loading device, operation is cumbersome, loading process is slow, and sheath is prone to axial movement during stent loading process, leading to low production efficiency. The stent loading device can realize automatic traction, avoid the movement of introduction sheath during stent loading process, and effectively improve production efficiency.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A stent loading device comprises:
[0008] An introduction sheath is provided with a limiting structure on the outer periphery side;
[0009] A loader is sleeved on the introduction sheath at the first end, and one end of the limiting structure is fixedly connected with the loader;
[0010] a driving assembly is arranged at one end of the introducing sheath tube, the driving assembly comprises a driving member and a screw structure connected with an output shaft of the driving member;
[0011] a traction wire is arranged in the introducing sheath tube and the loader, a first end of the traction wire is connected with a nut member of the screw structure, and a second end of the traction wire is connected with a support.
[0012] In some possible implementation manners, the material of the traction wire is nylon or polytetrafluoroethylene.
[0013] In some possible implementation manners, the screw structure comprises the nut member and a screw rod member, the nut member is matched with the screw rod member through balls, the screw rod member is connected with the output shaft of the driving member, the nut member is detachably provided with a sliding block, and the traction wire is arranged in a guide hole of the sliding block.
[0014] In some possible implementation manners, the screw rod member is provided with a scale, and the scale is arranged along the length direction of the screw rod member.
[0015] In some possible implementation manners, the limiting structure comprises a limiting block and a compression soft block, the limiting block is provided with an elongated groove for accommodating the introducing sheath tube, the compression soft block is arranged at the end of the two side walls of the elongated groove and is compressed to the introducing sheath tube, and the limiting block is fixedly connected with the loader.
[0016] In some possible implementation manners, the driving member is controlled to be turned on and turned off through a foot pedal.
[0017] In some possible implementation manners, the second end of the loader is provided with a tapered guide inlet, the large end of the guide inlet is arranged away from the introducing sheath tube, the inner diameter of the large end is greater than the outer diameter of the support, and the inner diameter of the small end of the guide inlet is smaller than the inner diameter of the introducing sheath tube.
[0018] In some possible implementation manners, the material of the loader is a transparent material.
[0019] In some possible implementation manners, the material of the loader is polymethyl methacrylate or glass.
[0020] In some possible implementation manners, the loader is fixedly arranged in a limiting groove structure.
[0021] The utility model discloses the beneficial effects of:
[0022] The support loading device of the utility model, through setting drive assembly, drive piece drive screw rod structure action, screw rod structure converts rotary motion into linear motion, namely, nut piece drives traction silk to move along axial direction, traction silk drives support to enter into lead-in sheath, only one person is needed to observe loading process, reduce the number of workers, realize automatic traction, effectively improve production efficiency;Through setting limiting structure on the outer circumferential side of lead-in sheath, avoid support in the process of loading, lead-in sheath produces axial and radial movement, improve the stability of lead-in sheath when support loading, further improve support loading efficiency and finished product quality. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the structure schematic diagram of the support loading device of an embodiment provided by the utility model embodiment;
[0024] Figure 2 It is the schematic diagram when the support provided by the utility model embodiment passes through loader and is introduced into lead-in sheath;
[0025] Figure 3 It is the structure schematic diagram of the support loading device of another embodiment provided by the utility model embodiment;
[0026] Figure 4 It is the assembly schematic diagram of limiting structure and lead-in sheath provided by the utility model embodiment.
[0027] In the drawing:
[0028] 100, lead-in sheath;200, loader;310, drive piece;321, nut piece;322, screw rod piece;410, limiting block;411, long strip recess;420, compression soft block;430, first pressing block;500, scale;600, sliding block;700, footboard;800, support;900, traction silk;1000, second pressing block;1100, limiting groove structure. DETAILED DESCRIPTION
[0029] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all structures.
[0030] In the description of the utility model, unless another definite provision and limit, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element internal communication or two element mutual action relationship.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0031] In the utility model, unless another definite provision and limit, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.
[0032] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0033] The embodiment provides a stent loading device, which aims to solve the problems that one person needs to pull and another person needs to observe the loading process when using the existing loading device, the operation is cumbersome, the loading process is slow, and the sheath is prone to move during the stent loading process, resulting in low production efficiency.The stent loading device can realize automatic traction, avoid axial and radial movement of the introduction sheath during the stent loading process, and effectively improve the production efficiency.
[0034] As Figures 1 to 4As shown, the stent loading device includes a lead-in sheath 100, a loader 200, a driving assembly, and a traction wire 900. The outer peripheral side of the lead-in sheath 100 is provided with a limiting structure, which can function to fix and support the lead-in sheath 100 and can be understood as a base of the lead-in sheath 100; the first end of the loader 200 is sleeved on the lead-in sheath 100, and one end of the limiting structure is fixedly connected with the loader 200; the driving assembly is arranged at one end of the lead-in sheath 100 in a spaced manner, and the driving assembly includes a driving member 310 and a lead screw structure in transmission connection with the output shaft of the driving member 310. The driving member 310 can be selected from a motor. The traction wire 900 is arranged through the lead-in sheath 100 and the loader 200, the first end of the traction wire 900 is connected with the nut member 321 of the lead screw structure, and the second end of the traction wire 900 is connected with the stent 800. In this embodiment, the material of the traction wire 900 is nylon or polytetrafluoroethylene. In other embodiments, the traction wire 900 can also be selected from other materials such as polypropylene. The setting can be made according to the needs.
[0035] The stent loading device described above, by arranging the driving assembly, the driving member 310 drives the lead screw structure to act, the lead screw structure converts the rotary motion into linear motion, so that the nut member 321 drives the traction wire 900 to move in the axial direction, the traction wire 900 drives the stent 800 to enter the lead-in sheath 100, only one person is needed to observe the loading process, the number of workers is reduced, automatic traction is realized, and the production efficiency is effectively improved; by arranging the limiting structure on the outer peripheral side of the lead-in sheath 100, the axial and radial movement of the lead-in sheath 100 during the loading of the stent 800 is avoided, the stability of the lead-in sheath 100 during the loading of the stent 800 is improved, and the loading efficiency and the quality of the finished product of the stent 800 are further improved.
[0036] Optionally, the lead screw structure includes a nut member 321 and a screw rod member 322, the nut member 321 is matched with the screw rod member 322 through balls, the screw rod member 322 is in transmission connection with the output shaft of the driving member 310, the sliding block 600 is detachably installed on the nut member 321, and the traction wire 900 is arranged through and fixed in the guide hole of the sliding block 600. The driving member 310 drives the screw rod member 322 to rotate, the screw rod member 322 drives the nut member 321 to move, the nut member 321 converts the rotary motion of the screw rod member 322 into linear motion, and further drives the traction wire 900 to move; the arrangement of the sliding block 600 facilitates the quick connection of the nut member 321 and the traction wire 900, and at the same time, the detachable connection of the sliding block 600 and the nut member 321 facilitates quick disassembly and assembly.
[0037] As a preferred, the screw rod member 322 is provided with a scale 500, and the scale 500 is arranged in the length direction of the screw rod member 322. In this way, the position of the sliding block 600 can be judged by observing the scale 500, and the advancing distance of the traction wire 900 is determined, which assists in timely understanding the loading process of the stent 800 to precisely control the loading process of the stent 800.
[0038] Referring to Figure 3 and Figure 4 In this embodiment, the limiting structure includes a limiting block 410 and a soft pressing block 420. The limiting block 410 is provided with a long slot 411 for accommodating the introducer sheath 100. The soft pressing block 420 is arranged at the end of the two side walls of the long slot 411 and is pressed against the introducer sheath 100. On the one hand, the soft pressing block 420 can cooperate with the limiting block 410 to limit the introducer sheath 100. On the other hand, the soft pressing block 420 has a certain elasticity, which can avoid deformation of the introducer sheath 100 due to excessive pressing force. As a preferred, the long slot 411 is provided as an arc-shaped slot, which matches the shape of the introducer sheath 100. Alternatively, referring to Figure 1 , the limiting structure can also include two first pressing blocks 430 symmetrically arranged and fixedly connected with the loader 200. The two first pressing blocks 430 are respectively pressed against the two sides of the introducer sheath 100. When assembled, the first pressing block 430 located at the bottom of the introducer sheath 100 can be connected with the external supporting assembly. Optionally, the first pressing block 430 includes a plurality of pressing rods spaced from each other and connected by a threaded member.
[0039] Optionally, the opening and closing of the driving member 310 are controlled by a foot pedal 700. The use of the foot pedal switch simplifies the operation process and can avoid direct contact with the control switch by hand, thereby improving the safety of use.
[0040] As a preferred, the second end of the loader 200 is provided with a tapered guide inlet. The large end of the guide inlet is arranged away from the introducer sheath 100 and has an inner diameter larger than the outer diameter of the stent 800. The inner diameter of the small end of the guide inlet is smaller than the inner diameter of the introducer sheath 100. By arranging the tapered guide inlet at the second end of the loader 200, and arranging the large end of the guide inlet away from the introducer sheath 100 and having an inner diameter larger than the outer diameter of the stent 800, the end of the stent 800 gradually shrinks when guiding the stent 800, thereby reducing the resistance when the stent 800 enters the loader 200 and reducing the damage to the coating of the stent 800 during loading. The open-loop structure will not be folded. At the same time, the inner diameter of the small end of the guide inlet is smaller than the inner diameter of the introducer sheath 100, which can effectively control the shape of the stent 800 entering the introducer sheath 100, so that the stent 800 is more easily loaded into the introducer sheath 100.
[0041] As a preferred, the material of the loader 200 is transparent. In this way, the loading process of the stent 800 can be observed. Optionally, the material of the loader 200 is polymethyl methacrylate or glass. In other embodiments, the loader 200 can also be made of other transparent high molecular materials, such as polycarbonate.
[0042] Optionally, referring to Figure 1 and Figure 2The second pressing block 1000 is arranged on both sides of the part of the introduction sheath tube 100 on which the loader 200 is sleeved, and is used for fixing the loader 200. When assembled, the second pressing block 1000 at the bottom of the loader 200 can be assembled and fixed with an external support assembly. The second pressing block 1000 can prevent the loader 200 from moving radially, and can also ensure that the introduction sheath tube 100 and the loader 200 are on the same axis, so that the loading process is stable and reliable. It should be noted that the size of the second pressing block 1000 can be set as required. Alternatively, see Figure 3 The loader 200 is fixedly installed in the limiting groove structure 1100, so that relative movement between the loader 200 and the limiting groove structure 1100 is avoided. For example, the loader 200 can be arranged on the limiting groove structure 1100 by welding or bonding. It can be understood that the limiting groove structure 1100 is used for fixing and supporting the loader 200, and the limiting groove structure 1100 can be connected with the limiting block 410 as an integrated structure.
[0043] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A stent loading device, characterized by, The utility model relates to a kind of medical device, including: Leading sheath (100), the outer peripheral side of leading sheath (100) is provided with limiting structure; Loader (200), the first end of loader (200) is sleeved on leading sheath (100), and one end of the limiting structure is fixedly connected with loader (200); Driving assembly, interval is provided in one end of leading sheath (100), and the driving assembly includes driving member (310) and screw structure connected with the output shaft of driving member (310); Traction wire (900), pass through leading sheath (100) and loader (200), the first end of traction wire (900) is connected with the nut piece (321) of screw structure, and the second end of traction wire (900) is connected with support (800).
2. The stent loading device of claim 1, wherein, The material of the traction wire (900) is nylon or polytetrafluoroethylene.
3. The stent loading device of claim 1, wherein, The screw structure includes the nut piece (321) and screw rod piece (322), the nut piece (321) is matched with the screw rod piece (322) by ball, the screw rod piece (322) is transmission connected with the output shaft of driving member (310), and the nut piece (321) is detachably installed with sliding block (600), and the traction wire (900) is fixedly arranged in the guide hole of sliding block (600).
4. The stent loading device of claim 3, wherein, The screw rod piece (322) is provided with scale (500), and the scale (500) is arranged along the length direction of the screw rod piece (322).
5. The stent loading device of claim 1, wherein, The limiting structure includes limiting block (410) and compression soft block (420), the limiting block (410) is provided with long slot (411) for accommodating leading sheath (100), the compression soft block (420) is arranged in the end of both side walls of long slot (411) and is compressed to leading sheath (100), and the limiting block (410) is fixedly connected with loader (200).
6. The stent loading device of claim 1, wherein, The opening and closing of the driving member (310) are controlled by foot pedal (700).
7. The stent loading device of claim 1, wherein, The second end of the loader (200) is provided with a tapered guide inlet, the large end of the guide inlet is away from the leading sheath (100) and the inner diameter of the large end is larger than the outer diameter of the support (800), and the inner diameter of the small end of the guide inlet is smaller than the inner diameter of the leading sheath (100).
8. The stent loading device of claim 7, wherein, The material of the loader (200) is transparent material.
9. The stent loading device of claim 8, wherein, The material of the loader (200) is polymethyl methacrylate or glass.
10. The stent loading device of claim 7, wherein, The loader (200) is fixedly installed in the limiting groove structure (1100).