Tool for testing recovery force of thrombectomy stent

The flexible fixing structure driven by threaded rods and servo motors solves the problem of insufficient adaptability of existing tooling, realizes stable testing of supports of different sizes, and improves testing accuracy and applicability.

CN224216204UActive Publication Date: 2026-05-08NEUROSAFE MEDICAL CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NEUROSAFE MEDICAL CO LTD
Filing Date
2025-07-15
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing thrombectomy support recovery force testing fixtures are difficult to adapt to thrombectomy supports of different sizes and specifications, resulting in insufficient test applicability and accuracy.

Method used

A test fixture structure including a threaded rod, a mounting plate, a locking plate, and a servo motor was designed. The spacing of the mounting plate is adjusted by driving the threaded rod with the servo motor, and the air pressure is adjusted by using an air chamber and a piston plate to achieve flexible fixation of supports of different sizes.

Benefits of technology

It achieves stable fixation of thrombus picks of different sizes and specifications, avoids crush damage, improves testing accuracy and applicability, and adapts to diverse testing needs.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224216204U_ABST
    Figure CN224216204U_ABST
Patent Text Reader

Abstract

The utility model, which belongs to the technical field of thrombectomy support testing, discloses a thrombectomy support recovery force testing tool comprising a testing tool main body and a testing assembly. The bearing plate is arranged on the testing tool body, and the testing assembly is arranged at the upper end of the testing tool body and located at the upper end of the bearing plate; the rectangular groove is formed in the bearing plate; according to the utility model, the positions of the locking plate and the limiting plate can be flexibly adjusted according to the dimension specification of the thrombectomy bracket during testing through the mounting plates arranged on the two sides of the threaded rod and the locking plate and the limiting plate which can move up and down in the mounting plates, so that the two ends of the bracket are effectively limited, the stability of the bracket in the testing process is guaranteed, and the testing efficiency is improved. The test tool is simple in structure and convenient to operate, the test result is prevented from being influenced by shaking or displacement, the accuracy of the thrombus extraction support recovery force test is ensured, the measured data is more reliable, and the test tool can adapt to supports of different sizes and specifications, so that the applicability of the test tool is remarkably improved, and diversified test requirements can be met.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of thrombectomy support testing technology, specifically relating to a thrombectomy support recovery force testing fixture. Background Technology

[0002] The stent retrieval force testing fixture is a specialized tool used to assess the force required for stent retrieval during the procedure. Its design is based on simulating stent retrieval scenarios in actual surgical operations. A specific structure connects the stent to a force sensor, applying tension under controlled conditions and recording data. The core function of this fixture is to quantify the stent retrieval force, ensuring it meets clinical operational requirements. Excessive retrieval force may lead to vascular damage, while insufficient force may cause stent dislodgement. Its applications focus on medical device research and development and quality control. By testing the retrieval force characteristics of stents of different sizes, it optimizes material formulations and structural designs. In the production stage, it allows for sampling and testing of finished stents to verify their retrieval performance against industry standards, ensuring that the closed-loop structure does not produce a fish-mouth effect or jamming during retrieval, thereby guaranteeing surgical safety and effectiveness.

[0003] Existing thrombectomy force testing fixtures typically constrain both ends of the thrombectomy bracket during use to ensure accuracy. However, their structures are often quite rigid, designed primarily for thrombectomy brackets of specific, fixed sizes. When testing the thrombectomy force of brackets of different sizes, these fixed fixtures reveal insufficient adaptability. Because the structure is difficult to adjust flexibly, it cannot meet the testing requirements of different sized thrombectomy brackets. Consequently, the applicability of the thrombectomy force testing fixture is significantly reduced in practical use when facing diverse thrombectomy bracket sizes, failing to fully realize its testing effectiveness and limiting the comprehensiveness and accuracy of the testing work to some extent. Utility Model Content

[0004] This utility model proposes a tooling for testing the recovery force of a retrieval bracket to solve the problem that existing technologies are difficult to adapt to retrieval brackets of different sizes and specifications.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tooling for testing the recovery force of a thrombectomy bracket, comprising:

[0006] Test fixture main body and test components;

[0007] A support plate is mounted on the main body of the test fixture, and the test components are mounted on the upper part of the main body of the test fixture and located on the upper part of the support plate;

[0008] A rectangular groove is formed inside the support plate, and a threaded rod is rotatably connected inside the rectangular groove. The external threads on both sides of the threaded rod are arranged in opposite directions.

[0009] Two mounting plates are respectively disposed on both sides of the threaded rod. Both mounting plates are provided with mounting grooves, and both mounting grooves are slidably connected with matching locking plates. Both locking plates are provided with limiting plates at their upper ends.

[0010] In a preferred embodiment, both mounting plates are provided with threaded holes adapted to the threaded rod. The two ends of the threaded rod pass through the two threaded holes respectively and are threadedly connected to the sidewalls of the threaded holes.

[0011] To further limit the position of thrombectomy brackets of different sizes and specifications, a drive groove is provided on one side of the rectangular groove, a servo motor is provided in the drive groove, and one end of the threaded rod extends into the drive groove and is set on the output end of the servo motor.

[0012] In a preferred embodiment, the upper end of the test fixture body is provided with a mounting sleeve, and a first electric push rod is provided inside the mounting sleeve. The output end of the first electric push rod extends to the outside and is located on the upper end of the test assembly.

[0013] In a preferred embodiment, fixing bolts are provided through both sides of the mounting plate, and two fixing bolts abut against both sides of the locking plate respectively.

[0014] In a preferred embodiment, the bottom end of the locking plate is provided with a guide rod, and the bottom end of the mounting groove is provided with a guide hole adapted to the guide rod. The bottom end of the guide rod is located in the guide hole and is slidably connected to the side wall of the guide hole.

[0015] To prevent damage to the thrombectomy bracket during testing, the bearing plate is further provided with an air chamber, and each of the two locking plates is provided with a piston chamber. Each of the two piston chambers is provided with a matching first piston plate, and each of the two first piston plates is provided with a positioning plate at its upper end. The upper ends of the two positioning plates extend to the outside and are respectively located at the bottom ends of the two limiting plates.

[0016] In a preferred embodiment, an adjustment groove is provided on one side of the air chamber, and a second electric push rod is provided in the adjustment groove. The output end of the second electric push rod is provided with a second piston plate that is adapted to the adjustment groove. Air guide pipes are provided on both sides of the air chamber, and the two air guide pipes are respectively connected to the two piston chambers.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model, through the mounting plates set on both sides of the threaded rod, and the locking plate and limiting plate that can move up and down within the mounting plates, allows for flexible adjustment of the positions of the locking plate and limiting plate according to the size and specifications of the bolt pick bracket during testing. This effectively limits both ends of the bracket, ensuring the stability of the bracket during testing and preventing the test results from being affected by shaking or displacement. It also ensures the accuracy of the bolt pick bracket recovery force test, making the measurement data more reliable. Furthermore, because it can adapt to brackets of different sizes and specifications, the applicability of this testing fixture is significantly improved, meeting diverse testing needs.

[0019] This invention utilizes an air chamber within a support plate, along with piston chambers and a first piston plate within two locking plates. By adjusting the air pressure within the air chamber, the first piston plate in the piston chamber is driven to move, thereby allowing the limiting plate to apply a limiting force to the thrombectomy bracket in a gentle yet precise manner. This flexible limiting method avoids the damage to the bracket caused by traditional rigid fixing, such as compression and deformation. While ensuring the stability required for testing, it maximizes the preservation of the integrity of the thrombectomy bracket. This testing fixture can be adapted to thrombectomy brackets of different materials and structures, significantly expanding its applicability and providing a more reliable and efficient solution for the performance evaluation of thrombectomy brackets. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main appearance of the structure of this utility model;

[0021] Figure 2 This is a side sectional view of the mounting sleeve of the present invention.

[0022] Figure 3 This is a schematic front cross-sectional view of the support plate of the present invention.

[0023] Figure 4 This is a side cross-sectional view of the support plate of the present invention.

[0024] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0025] In the diagram: 1. Main body of the test fixture; 2. Test component; 3. Bearing plate; 4. Threaded rod; 5. Mounting plate; 6. Locking plate; 7. Limiting plate; 8. Servo motor; 9. Mounting sleeve; 10. First electric push rod; 11. Fixing bolt; 12. Guide rod; 13. First piston plate; 14. Positioning plate; 15. Second electric push rod; 16. Second piston plate; 17. Air guide pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0027] Please see Figure 1-5 This utility model provides a tooling for testing the recovery force of a thrombectomy bracket, comprising:

[0028] Test fixture body 1 and test component 2;

[0029] The support plate 3 is set on the test fixture body 1, and the test component 2 is set on the upper end of the test fixture body 1 and located on the upper end of the support plate 3;

[0030] A rectangular groove is formed inside the bearing plate 3, and a threaded rod 4 is rotatably connected inside the rectangular groove. The external threads on both sides of the threaded rod 4 are arranged in opposite directions.

[0031] Two mounting plates 5 are respectively set on both sides of the threaded rod 4. Both mounting plates 5 are provided with mounting grooves. Both mounting grooves are slidably connected with matching locking plates 6. Both locking plates 6 are provided with limit plates 7 at their upper ends.

[0032] Specifically, such as Figure 3 As shown, both mounting plates 5 are provided with threaded holes that are compatible with the threaded rod 4. The two ends of the threaded rod 4 pass through the two threaded holes respectively and are threadedly connected to the side wall of the threaded hole.

[0033] Its design allows the threaded rod 4, with its external threads on both sides arranged in opposite directions, to move the mounting plates 5 on both sides in opposite directions when it rotates. The distance between the two mounting plates 5 can be adjusted according to the size and specifications of the bolt catcher, thus adapting to bolt catchers of different sizes and specifications, making the bolt catcher recovery force testing fixture more suitable for use.

[0034] Specifically, such as Figure 3 As shown, a drive slot is provided on one side of the rectangular slot, and a servo motor 8 is provided in the drive slot. The servo motor 8 is existing technology and will not be described in detail here. One end of the threaded rod 4 extends into the drive slot and is set on the output end of the servo motor 8.

[0035] Specifically, such as Figure 2 As shown, the upper end of the test fixture body 1 is provided with an installation sleeve 9, and the installation sleeve 9 is provided with a first electric push rod 10. The first electric push rod 10 is existing technology and will not be described in detail here. The output end of the first electric push rod 10 extends to the outside and is set on the upper end of the test assembly 2. When the first electric push rod 10 is started, it will drive the test assembly 2 to move up and down, so that the recovery force test of the bolt pick brackets at different heights can be flexibly performed.

[0036] Specifically, such as Figure 4 As shown, fixing bolts 11 are provided through both sides of the mounting plate 5. The two fixing bolts 11 abut against the two sides of the locking plate 6 respectively. The two fixing bolts 11 can limit the locking plate 6 to different heights, so as to adapt to different sizes and specifications of bolt removal brackets.

[0037] Specifically, such as Figure 3 and Figure 5 As shown, the bottom end of the locking plate 6 is provided with a guide rod 12, and the bottom end of the mounting groove is provided with a guide hole that matches the guide rod 12. The bottom end of the guide rod 12 is located in the guide hole and is slidably connected to the side wall of the guide hole. The guide rod 12, in conjunction with the guide hole, can limit the up and down movement of the locking plate 6, preventing it from shifting its position during movement, thereby ensuring the accuracy of the position limit of the bolt removal bracket. Example 2

[0038] Please see Figure 1-5 This utility model provides a tooling for testing the recovery force of a thrombectomy bracket, comprising:

[0039] Test fixture body 1 and test component 2;

[0040] The support plate 3 is set on the test fixture body 1, and the test component 2 is set on the upper end of the test fixture body 1 and located on the upper end of the support plate 3;

[0041] A rectangular groove is formed inside the bearing plate 3, and a threaded rod 4 is rotatably connected inside the rectangular groove. The external threads on both sides of the threaded rod 4 are arranged in opposite directions.

[0042] Two mounting plates 5 are respectively set on both sides of the threaded rod 4. Both mounting plates 5 are provided with mounting grooves. Both mounting grooves are slidably connected with matching locking plates 6. Both locking plates 6 are provided with limit plates 7 at their upper ends.

[0043] Specifically, such as Figure 3 , Figure 4 and Figure 5 As shown, an air chamber is provided in the bearing plate 3, and a piston chamber is provided in each of the two locking plates 6. A matching first piston plate 13 is provided in each of the two piston chambers. A positioning plate 14 is provided at the upper end of each of the two first piston plates 13. The upper ends of the two positioning plates 14 extend to the outside and are respectively set at the bottom ends of the two limiting plates 7.

[0044] Through its design, by changing the air pressure in the air chamber, the positions of the two first piston plates 13 and the two positioning plates 14 can be flexibly adjusted. This not only allows the two limiting plates 7 to flexibly abut against bolt removal brackets of different sizes and specifications, but this flexible limiting method also avoids the damage such as squeezing and deformation that traditional rigid fixing may cause to the bracket.

[0045] Specifically, such as Figure 3 , Figure 4 and Figure 5 As shown, an adjustment groove is provided on one side of the air chamber, and a second electric push rod 15 is provided in the adjustment groove. The second electric push rod 15 is existing technology and will not be described in detail here. The output end of the second electric push rod 15 is provided with a second piston plate 16 that is adapted to the adjustment groove. Air guide pipes 17 are provided on both sides of the air chamber. The two air guide pipes 17 are respectively connected to the two piston chambers. When the second electric push rod 15 is started, its output end will drive the second piston plate 16 to move. In conjunction with the two air guide pipes 17, the air pressure in the air chamber and the two piston chambers can be changed, thereby driving the two first piston plates 13 to move simultaneously.

[0046] See Figure 1-5 When testing the bolt catcher using the recovery force testing fixture, the servo motor 8 is first activated according to the size specifications of the bolt catcher. The output of the servo motor 8 drives the threaded rod 4 to rotate, which in turn drives the mounting plates 5 on both sides to move in opposite directions. Then, the two ends of the bolt catcher are placed on the upper ends of the two limiting plates 7, and the positions of the two locking plates 6 are adjusted and locked by the fixing bolts 11. This allows for flexible limitation of the position of bolt catchers of different sizes. Next, the second electric push rod 15 is activated. The output of the second electric push rod 15 drives the second piston plate 16 to move, thereby changing the air pressure in the air chamber and the two piston chambers. When the air pressure in the two piston chambers changes, it drives the two first piston plates 13 and the two positioning plates 14 to move upward, which in turn drives the two limiting plates 7 to move upward, fixing the two ends of the bolt catcher. This further improves the flexibility of limiting the position of bolt catchers of different sizes, making the bolt catcher recovery force testing fixture more applicable.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing the recovery force of a thrombec retrieval bracket, characterized in that, include: Test fixture main body (1) and test components (2); The support plate (3) is set on the test fixture body (1), and the test component (2) is set on the upper end of the test fixture body (1) and located on the upper end of the support plate (3); A rectangular groove is formed inside the bearing plate (3), and a threaded rod (4) is rotatably connected inside the rectangular groove. The external threads on both sides of the threaded rod (4) are arranged in opposite directions. Two mounting plates (5) are respectively set on both sides of the threaded rod (4). Both mounting plates (5) are provided with mounting grooves. Both mounting grooves are slidably connected with matching locking plates (6). Both locking plates (6) are provided with limiting plates (7) at their upper ends.

2. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: Both mounting plates (5) are provided with threaded holes that are compatible with the threaded rod (4). The two sections of the threaded rod (4) pass through the two threaded holes respectively and are threadedly connected to the side wall of the threaded hole.

3. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: A drive slot is provided on one side of the rectangular slot, and a servo motor (8) is provided in the drive slot. One end of the threaded rod (4) extends into the drive slot and is set on the output end of the servo motor (8).

4. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: The test fixture body (1) is provided with an installation sleeve (9) at the upper end. The installation sleeve (9) is provided with a first electric push rod (10). The output end of the first electric push rod (10) extends to the outside and is set at the upper end of the test assembly (2).

5. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: The mounting plate (5) is provided with fixing bolts (11) on both sides, and the two fixing bolts (11) abut against the two sides of the locking plate (6).

6. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: The bottom end of the locking plate (6) is provided with a guide rod (12), and the bottom end of the mounting groove is provided with a guide hole that matches the guide rod (12). The bottom end of the guide rod (12) is located in the guide hole and is slidably connected to the side wall of the guide hole.

7. The thrombec retriever recovery force testing fixture according to claim 1, characterized in that: The bearing plate (3) has an air cavity, and the two locking plates (6) each have a piston cavity. The two piston cavities each have a matching first piston plate (13). The upper ends of the two first piston plates (13) each have a positioning plate (14). The upper ends of the two positioning plates (14) extend to the outside and are respectively set at the bottom ends of the two limiting plates (7).

8. The thrombec retriever recovery force testing fixture according to claim 7, characterized in that: An adjustment groove is provided on one side of the air chamber, and a second electric push rod (15) is provided in the adjustment groove. The output end of the second electric push rod (15) is provided with a second piston plate (16) that is adapted to the adjustment groove. Air guide pipes (17) are provided on both sides of the air chamber, and the two air guide pipes (17) are respectively connected to the two piston chambers.