Mechanical iris structure for balloon crimping

Abstract

The utility model provides a kind of for balloon pressure holds the mechanical iris structure, it is related to medical instrument technical field, including top disc: locking cooperation structure and several keyways are arranged on top disc;Turntable: handle and several guide structures are arranged on turntable, turntable can be rotated compared with top disc;Blade: blade sets several groups, and the space for pressure holds balloon is enclosed, blade is provided with upper guide body and lower guide body. The opening and closing control of mechanical iris is realized using the way of slide rail guidance, the stepless change of blade center maximum diameter can be realized by rotating bottom disc handle, locking body can be used to fix turntable, avoid blade to occur tiny radial rebound or sliding, leading to the problem that aperture gradually increases, pressure holds force drops, with good reliability. Scale indication is arranged on bottom disc, the size of blade center maximum diameter can be provided in real time.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a mechanical iris structure for balloon compression. Background Technology

[0002] In the field of interventional medical devices, balloon catheters are key instruments widely used in surgeries such as angioplasty, stent implantation, and valve replacement. Before being delivered to the target location, the balloon needs to be squeezed to minimize its outer diameter, thus facilitating smooth passage through the vascular pathway and reducing trauma. Traditional balloon squeezing methods often rely on manual operation or simple mechanical tools, resulting in low efficiency, poor consistency, and potential damage to the balloon material. With the development of high-precision interventional surgery, higher demands are placed on the uniformity, symmetry, and repeatability of balloon squeezing.

[0003] To improve the quality of balloon compression, mechanical iris structures are increasingly being introduced into the balloon compression process. These devices use a rotating adjusting ring to drive blades to synchronously contract or expand radially, thereby applying uniform radial pressure to the centrally located balloon to complete the compression or expansion operation. This type of mechanical structure has improved the consistency and efficiency of compression to a certain extent and has become one of the important tools in balloon pretreatment.

[0004] Existing mechanical iris-type pressure gripping devices still have several significant drawbacks.

[0005] Traditional pressure-gripping devices often employ pin-hole adjustment, where the blade center size depends on the position and number of pin holes, making stepless size adjustment difficult. Iris structures with stepless adjustment often lack an effective locking mechanism during pressure gripping. After rotating the adjustment ring to retract the blade to the target diameter, the blade mechanism relies solely on the self-locking action of the threads or friction pairs to maintain its position. However, under continuous pressure, especially when handling high-strength balloon materials or maintaining pressure for extended periods, the blade may experience slight radial rebound or slippage, leading to a gradual increase in aperture and a decrease in gripping force. This instability directly affects gripping quality, causing uneven balloon folds, poor stent attachment, and even premature balloon detachment during delivery, posing surgical risks.

[0006] Furthermore, most devices lack precise diameter indication functionality. Operators typically rely on experience or external measuring tools to determine the current aperture size, making it impossible to obtain the actual diameter value formed by the center of the blade in real time and intuitively during the compression process. This results in insufficient precision in compression size control, especially in applications with strict requirements for balloon diameter (such as matching pre-dilation balloons with stents, and staged dilation of valve balloons), where dimensional deviations can easily affect surgical outcomes. In addition, due to the lack of scale markings, it is difficult to achieve repeatable compression diameters between different operators or between different operations, reducing the consistency and reliability of the process.

[0007] In summary, existing mechanical iris-type balloon gripping devices have significant shortcomings in diameter indication and position fixation, which limits their application in high-precision interventional procedures. To address these deficiencies, this application is proposed. Utility Model Content

[0008] The purpose of this invention is to provide a mechanical iris structure for balloon gripping that enables stepless adjustment of the blade center diameter and has reliable locking capability, thereby improving the controllability and reliability of balloon gripping.

[0009] To solve the above problems, this utility model provides a mechanical iris structure for balloon compression, including a top plate: the top plate is provided with a locking fit structure and several keyways;

[0010] Turntable: The turntable is equipped with a handle and several guide structures, and the turntable can rotate relative to the top plate;

[0011] Blades: Several sets of blades are arranged to form a space for pressing and gripping the balloon. Each blade is equipped with an upper guide body and a lower guide body. The upper and lower guide bodies cooperate with the keyway on the top plate and the guide structure on the turntable, respectively. Rotating the turntable allows the diameter of the space enclosed by the blades to be adjusted steplessly.

[0012] Chassis: The chassis and top plate are assembled to form a space for accommodating the blades and turntable;

[0013] Locking body: The locking body can cooperate with the locking mechanism to lock the position of the turntable.

[0014] The top plate and the bottom plate can be connected by means such as bolts, snap-fit, or adhesive to form a cylindrical integral structure. From top to bottom, the components are top plate, blades, turntable, and bottom plate. A circular through hole is provided in the center of the top plate.

[0015] To overcome the problem of real-time acquisition of the blade center size in the use of traditional iris structures, this solution can determine the required size based on scale indications, improving the accuracy and repeatability of the structure's use. According to one embodiment of this utility model, a scale area is provided on the chassis, and the scale area is located around the movement path of the handle.

[0016] According to one embodiment of the present invention, the upper guide body and the lower guide body are respectively a cylindrical guide post and a guide block, and the guide structure is a guide groove for accommodating the guide block.

[0017] The maximum diameter of the blade center can be infinitely varied by rotating the base handle. The blades are installed between the turntable and the top plate, arranged closely around the circumference. The guide blocks at the bottom of the blades are fitted into the guide grooves of the turntable, and the guide posts at the top of the blades are fitted into the keyways of the top plate. By rotating the turntable by rotating the handle, the movement trajectory of the blades is restricted by the direction of the grooves on the turntable and the top plate. The blades follow the rotation, forming a regular N-gon (depending on the number of blades).

[0018] Optionally, the blades are provided in 3 to 18 groups.

[0019] Preferably, six sets of blades are provided.

[0020] According to one embodiment of the present invention, the locking and engaging structure includes a limiting groove, and the locking body can be inserted into the limiting groove to lock the position of the handle.

[0021] Optionally, the locking body and the handle can be detachably connected by a plug-in or snap-fit ​​method.

[0022] Preferably, the locking body includes a pin that can be inserted into a limiting groove, the limiting groove extending along the movement path of the handle, the pin being interference-fitted with the limiting groove, and the handle being provided with a locking hole for the pin to pass through.

[0023] The handle is limited by a locking body to fix the blade.

[0024] According to one embodiment of the present invention, the end of the pin is provided with a tapered (or wedge-shaped) portion to facilitate insertion into the limiting groove.

[0025] According to one embodiment of the present invention, a top plate protrusion is provided on the outer circle of the top plate in a radial direction, a limiting groove is provided on the top plate protrusion, and the handle moves above the top plate protrusion.

[0026] According to one embodiment of the present invention, the chassis is provided with a limiting notch, and the handle moves within the limiting notch to limit the movable range of the handle and facilitate the positioning and installation of the turntable during production.

[0027] According to one embodiment of the present invention, the top plate and / or the bottom plate are provided with a hollowed-out portion. Several sets of hollowed-out portions can be provided, which can not only save materials and reduce weight, but also make the internal structure visible, which is convenient for use, assembly and maintenance.

[0028] The beneficial effects of this utility model are that by setting blades with guide posts and guide blocks, the movement trajectory of the blades is restricted by the groove direction of the turntable and the top plate. The opening and closing control of the mechanical iris is realized by using a slide rail guide. By rotating the base handle, the maximum diameter of the blade center can be infinitely changed, improving controllability. After the blade adjustment is completed, the turntable can be fixed by the locking body to fix the size of the maximum diameter of the blade center, avoiding the problem of the blade experiencing slight radial rebound or sliding, which would cause the aperture to gradually increase and the gripping force to decrease. It has good reliability.

[0029] This solution features a scale indicator on the chassis that provides real-time information on the maximum diameter of the blade center, ensuring precise control of the gripping dimensions and improving the repeatability of balloon gripping. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 A schematic diagram of the overall structure of the mechanical iris structure used for balloon compression;

[0032] Figure 2 Another perspective structural diagram of the mechanical iris structure used for balloon compression;

[0033] Figure 3 A schematic diagram of the exploded structure of the mechanical iris structure used for balloon compression;

[0034] Figure 4 This is a magnified view of a portion of the scale area;

[0035] Figure 5 This is a schematic diagram of the chassis structure;

[0036] Figure 6 This is a schematic diagram of the turntable structure;

[0037] Figure 7 This is a schematic diagram of the blade structure;

[0038] Figure 8 This is a schematic diagram of the top plate structure;

[0039] In the figure: blade 1, guide post 1-1, guide block 1-2; turntable 2, guide groove 2-1, handle 2-2, locking hole 2-3, top plate 3, top plate protrusion 3-1, limit groove 3-2, keyway 3-3, base plate 4, scale area 4-1, locking body 5, hollow part 6. Detailed Implementation

[0040] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0041] Example 1:

[0042] A mechanical iris structure for balloon compression, such as Figures 1-8 It includes blade 1, turntable 2, top plate 3, bottom plate 4, and locking body 5.

[0043] The top plate 3 and the bottom plate 4 can be connected by means such as bolts, snap-fit, or adhesive. The bottom plate 4 and the top plate 3 are assembled to form a space for accommodating the blade 1 and the turntable 2, forming a cylindrical integral structure. The product consists of the top plate 3, blade 1, turntable 2 and bottom plate 4 from top to bottom. The top plate 3 has a circular through hole in the center for inserting the balloon.

[0044] like Figure 7 Several sets of blades 1 are arranged to form a space for pressing and gripping the balloon. Blade 1 has a triangular structure and is installed between turntable 2 and top plate 3, arranged closely along the circumference. Blade 1 is provided with an upper guide body and a lower guide body. The upper guide body and the lower guide body cooperate with the keyway 3-3 on the top plate 3 and the guide structure on the turntable 2, respectively. In this embodiment, the upper guide body and the lower guide body are cylindrical guide post 1-1 and guide block 1-2, respectively. Preferably, the guide block 1-2 is square. The guide block 1-2 at the lower part of blade 1 is assembled in the guide groove 2-1 of the turntable, and the guide post 1-1 at the upper part of blade is assembled in the keyway 3-3 of the top plate.

[0045] The blade 1 is set with 3 to 18 groups, preferably with 6 groups.

[0046] like Figure 6 The turntable 2 is equipped with a handle 2-2 and several guide structures. The turntable 2 can rotate relative to the top plate 3. The guide structure is a guide groove 2-1 for accommodating the guide block 1-2. It is a rectangular long groove distributed in a regular N-gon (N can be 3-18). The inner wall of the guide groove can be coated with an oil film or lubricating coating to reduce sliding friction. The handle 2-2 is provided with a locking hole 2-3 for the pin shaft to pass through. The turntable 2 is provided with a through hole in the center.

[0047] Rotating the turntable 2 via the handle 2-2 restricts the movement trajectory of blade 1 by the slot direction of turntable 2 and top plate 3, causing the blade to rotate and form a regular N-sided space (depending on the number of blades).

[0048] like Figure 8 The top plate 3 is provided with a locking fit structure and several keyways 3-3. The number of keyways corresponds to the number of blades. The keyways and the guide posts of the blades are matched in shape and size. The inner wall of the keyway can be coated with an oil film or lubricating coating to reduce sliding friction. The locking fit structure includes a limiting groove 3-2. The outer circle of the top plate 3 is provided with a top plate protrusion 3-1 protruding in the radial direction. The limiting groove 3-2 is provided on the top plate protrusion 3-1. The handle moves above the top plate protrusion 3-1. The locking body 5 can be inserted into the limiting groove 3-2 to lock the position of the handle 2-2.

[0049] The chassis 4 is provided with a limiting notch 4-2, and the handle 2-2 moves within the limiting notch 4-2 to limit the movable range of the handle 2-2 and facilitate the positioning and installation of the turntable 2 during production.

[0050] The guide posts 1-1 on the upper and lower surfaces of the blade match the dimensions of the keyway 3-3 on the top plate, and the guide block 1-2 matches the dimensions and shape of the square guide groove 2-1 on the turntable 2. When the iris structure moves, the guide post 1-1 slides along the keyway 3-3, and the guide block 1-2 slides synchronously along the square guide groove 2-1. To ensure lubrication, the guide posts and guide blocks can be coated with oil film or lubricating coating to reduce sliding friction. Rotating the turntable 2 allows the diameter of the space enclosed by the blade 1 to be adjusted steplessly.

[0051] Locking body 5 is used to lock the position of turntable 2.

[0052] Optionally, the locking body 5 and the handle 2-2 can be detachably connected by a plug-in or snap-fit ​​connection.

[0053] In this embodiment, the locking body 5 and the handle 2-2 are connected by a plug-in joint. The locking body 5 includes a pin that can be inserted into the limiting groove 3-2. The limiting groove 3-2 extends along the movement path of the handle 2-2. The end of the pin is provided with a tapered (or wedge-shaped) part to facilitate insertion into the limiting groove 3-2. After the pin is inserted into the limiting groove 3-2, it is press-fitted with it. The handle 2-2 is provided with a locking hole 2-3 for the pin to pass through. The handle is limited by the locking body 5 to fix the blade.

[0054] Example 2:

[0055] Based on Example 1, in this example, in order to overcome the problem of real-time acquisition of the center size of the blade in the use of traditional iris structures, this solution can determine the required size according to the scale indication, thereby improving the accuracy and repeatability of the structure.

[0056] like Figure 2 , Figure 4 , Figure 5The chassis 4 is provided with a scale area 4-1, which is located around the movement path of the handle 2-2. The scale represents the diameter of the center of the iris structure blade. The scale is designed according to the variation law of the maximum diameter of the blade rotation. It is preferably located on the lower side of the handle 2-2. Indicator lines can be set on the handle 2-2 for easy comparison of the scale.

[0057] During use, the doctor first places the balloon at the center of the blade of the mechanical iris structure before the operation, adjusts the center size of the blade by sliding the handle on the base plate, and aligns the scale indicator of the handle with the required scale value on the base plate according to the theoretical size of the balloon diameter. At this point, the stepless adjustment of the center diameter of the blade is completed. The handle and the top plate are fixed by the pin to lock the diameter size, and the doctor can then carry out other procedures or verifications.

[0058] Example 3:

[0059] Based on Example 1 or 2, such as Figure 5 , Figure 8 The top plate 3 and the bottom plate 4 are provided with hollow parts 6. Several sets of hollow parts 6 can be set, which can not only save materials and reduce weight, but also make the internal structure visible, which is convenient for use, assembly and maintenance.

[0060] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A mechanical iris structure for balloon compression, characterized in that: include: Top plate (3): The top plate (3) is provided with a locking fit structure and several keyways (3-3); Turntable (2): The turntable (2) is equipped with a handle (2-2) and several guide structures, and the turntable (2) can rotate relative to the top plate (3); Blade (1): Several sets of blades (1) are set to form a space for pressing the balloon. The blade (1) is provided with an upper guide body and a lower guide body. The upper guide body and the lower guide body cooperate with the keyway (3-3) on the top plate (3) and the guide structure on the turntable (2) respectively. Rotating the turntable (2) allows the diameter of the space formed by the blade (1) to be adjusted steplessly. Chassis (4): The chassis (4) is assembled with the top plate (3) to form a space for accommodating the blade (1) and the turntable (2); Locking body (5): Locking body (5) can cooperate with locking mechanism to lock the position of turntable (2).

2. The mechanical iris structure for balloon compression according to claim 1, characterized in that: The chassis (4) is provided with a scale area (4-1), which is located around the movement path of the handle (2-2).

3. The mechanical iris structure for balloon gripping according to claim 1 or 2, characterized in that: The upper guide body and the lower guide body are respectively a cylindrical guide post (1-1) and a guide block (1-2), and the guide structure is a guide groove (2-1) for accommodating the guide block (1-2).

4. The mechanical iris structure for balloon gripping according to claim 1 or 2, characterized in that: The locking mechanism includes a limiting groove (3-2), and the locking body (5) can be inserted into the limiting groove (3-2) to lock the position of the handle (2-2).

5. The mechanical iris structure for balloon compression according to claim 4, characterized in that: The locking body (5) includes a pin that can be inserted into a limiting groove (3-2), the limiting groove (3-2) extends along the movement path of the handle (2-2), the pin is interference-fitted with the limiting groove (3-2), and the handle (2-2) is provided with a locking hole (2-3) for the pin to pass through.

6. The mechanical iris structure for balloon compression according to claim 5, characterized in that: The end of the pin is provided with a tapered part, which facilitates insertion into the limiting groove (3-2).

7. The mechanical iris structure for balloon compression according to claim 5 or 6, characterized in that: The top plate (3) has a radially protruding top plate protrusion (3-1) on its outer circle, and a limiting groove (3-2) is provided on the top plate protrusion (3-1).

8. The mechanical iris structure for balloon compression according to claim 5 or 6, characterized in that: The chassis (4) is provided with a limiting notch (4-2), and the handle (2-2) moves within the limiting notch (4-2).

9. The mechanical iris structure for balloon gripping according to claim 1, characterized in that: The top plate (3) and / or bottom plate (4) are provided with hollowed-out parts.

10. The mechanical iris structure for balloon compression according to claim 1, characterized in that: The blades (1) are arranged in 3 to 18 groups.

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