Support loading device

Abstract

The invention discloses a support loading device which comprises a fixing base, a plurality of pressing and holding mechanisms connected to the fixing base and a power source, and the pressing and holding mechanisms are coaxially arranged in sequence in the axial direction. Each pressing and holding mechanism comprises a telescopic compression assembly and a transmission unit arranged between the power source and the pressing and holding mechanism, and the power source sequentially drives the compression assemblies of the multiple pressing and holding mechanisms to expand or contract through the transmission units. According to the bracket loading device disclosed by the invention, one-time continuous pressing and holding can be realized in the mounting process of the bracket, so that the bracket loading work is efficiently and consistently completed in an automatic or semi-automatic manner, the problems of diameter shrinkage, non-uniform local stacking and the like of the loaded bracket are avoided, and the assembly efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a stent loading device. Background Art

[0002] Cardiovascular diseases are one of the main causes of death globally. According to data from the World Health Organization, millions of people die from cardiovascular diseases every year. With the changes in modern lifestyles and the poor diet and exercise habits of people, the incidence of cardiovascular diseases has also increased. As a treatment method with advantages such as less trauma, quick recovery, and significant effects, stent interventional therapy is increasingly applied in clinical treatment.

[0003] Stents are usually compressed to a certain extent and loaded into a delivery device. After reaching the lesion site through the path established by a guide wire, they are released to achieve the treatment purpose. The compression and loading of the stent will directly affect the success of the stent release process and the state of the stent after release.

[0004] However, in the prior art, tools such as cable ties are used to manually compress and hold the stent and then load it into the delivery device. There are problems such as stent diameter reduction after loading and uneven local stacking of the stent, and the assembly efficiency is low. Summary of the Invention

[0005] The present invention aims to avoid the problems of stent diameter reduction and uneven local stacking of the stent after manual assembly of the stent.

[0006] The present invention solves its technical problems through the following technical solutions:

[0007] According to a first aspect of the present invention, there is provided a stent loading device, including a fixed seat, a plurality of crimping mechanisms connected to the fixed seat, and a power source. The plurality of crimping mechanisms are coaxially arranged in sequence along the axial direction. The crimping mechanism includes a telescopic compression assembly and a transmission unit disposed between the power source and the crimping mechanism. The power source drives the compression assemblies of the plurality of crimping mechanisms to expand or contract in sequence through the transmission unit.

[0008] Through the above embodiments of the present invention, doctors can achieve one-time continuous crimping during the process of loading the stent, thereby efficiently and consistently completing the stent loading work in an automatic or semi-automatic manner, avoiding problems such as stent diameter reduction and uneven local stacking after loading, and improving the assembly efficiency.

[0009] In some embodiments of the present invention, the power source includes a power wheel rotatably connected to the fixed seat, a plurality of the pressing and holding mechanisms are all arranged inside the power wheel, and the transmission unit is arranged between the power wheel and the pressing and holding mechanisms; the pressing and holding mechanism further includes a transmission disc assembly, the transmission unit is connected to the power wheel and the transmission disc assembly, the transmission disc assembly includes a fixed disc and a driving disc, and the compression assembly is movably connected between the fixed disc and the driving disc.

[0010] In some embodiments of the present invention, the transmission unit includes a transmission member and an elastic member, and the transmission member is used for clamping the driving disc under the drive of the elastic member; a guiding hole is arranged on the inner side wall of the power wheel, the guiding hole is arranged along the radial direction of the power wheel, the transmission member is slidably connected to the guiding hole, and the elastic member is arranged between the bottom wall of the guiding hole and the transmission member, and the elastic member is used for driving the transmission member to move towards the driving disc.

[0011] In some embodiments of the present invention, a clamping groove is arranged on the edge of the driving disc, the transmission member includes a sliding seat and a sliding block arranged on the sliding seat and abutting against the driving disc. When the sliding block is located in the clamping groove and abuts against the side wall of the clamping groove, the driving disc can rotate circumferentially under the drive of the transmission member; an arc-shaped step portion is arranged on the edge of the fixed disc, a sliding groove is arranged on the step portion, and an inclined first guiding surface is arranged on the end surface of the sliding groove. The transmission member further includes a guiding block arranged on the sliding seat and abutting against the fixed disc, and an inclined second guiding surface is arranged on one side of the guiding block facing the first guiding surface. The thickness of the step portion is greater than or equal to the depth of the clamping groove; when the transmission member slides from the sliding groove along the first guiding surface onto the step portion, the sliding block disengages from the clamping groove.

[0012] In some embodiments of the present invention, the fixed seat includes a bottom plate and a mounting plate arranged on one side of the bottom plate. A fixing rod is arranged on the mounting plate, a rotating hole is arranged on the driving disc, and after the fixing rod passes through the rotating hole, it is fixedly connected to the fixed disc. The rotating hole is arranged in an arc shape with the axis of the power wheel as the center; along the direction from near the mounting plate to far from the mounting plate, the circumferential angles of the sliding grooves and the clamping grooves of the plurality of the pressing and holding mechanisms increase in sequence; the differences in the circumferential angles of the sliding grooves and the clamping grooves of the plurality of the pressing and holding mechanisms themselves are the same.

[0013] In some embodiments of the present invention, the compression assembly includes a plurality of compression members. The inner sides of the plurality of compression members are spliced into an equilateral polygon shape. A splicing angle is provided at the tail end of the compression member. The splicing angle includes a first straight edge and a second straight edge arranged at an angle. The first straight edge and the second straight edge respectively extend along the sides of the equilateral polygon formed by splicing the inner sides of the plurality of compression members. A compression plate is provided on the compression member in the direction towards the center of the power wheel.

[0014] In some embodiments of the present invention, a first track groove is provided on the driving disk. The first track groove is arranged along the radial direction of the driving disk. A driving pin is provided on one side of the compression member facing the driving disk. The driving pin is embedded in the first track groove and slides along the first track groove. A second track groove is provided on the fixed disk. The shape of the second track groove is the same as the equilateral polygon formed by splicing the inner sides of the plurality of compression members. A fixing pin is provided on one side of the compression member facing the fixed disk. The fixing pin is embedded in the second track groove and slides along the second track groove.

[0015] In some embodiments of the present invention, the power source includes a plurality of gear disks and a driving member radially arranged on one side of the plurality of pressing and holding mechanisms. The plurality of gear disks are coaxially arranged. The driving member is used to drive the plurality of gear disks to rotate coaxially. The pressing and holding mechanisms correspond to the gear disks one by one. A first tooth portion is provided on the outer edge of the pressing and holding mechanism. A second tooth portion meshing with the first tooth portion is provided on the outer edge of the gear disk.

[0016] In some embodiments of the present invention, the driving member includes an operation disk coaxially arranged with the gear disk. The second tooth portion covers a part of the outer peripheral surface of the gear disk. The second tooth portions of the plurality of gear disks are arranged in a circumferential phase dislocation at a preset phase in sequence.

[0017] In some embodiments of the present invention, the driving member includes a motor and a sensor. The sensor calculates the rotation angle by monitoring the number of teeth passed by the first tooth portion, thereby controlling the start and stop of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0019] Figure 1 is a front structural schematic diagram of the bracket loading device in Embodiment 1 of the present invention;

[0020] Figure 2 is a back structural schematic diagram of the bracket loading device in Embodiment 1 of the present invention;

[0021] Figure 3 is an exploded view of the bracket loading device in Embodiment 1 of the present invention;

[0022] Figure 4 Explosion diagram of the pressing and holding mechanism in Embodiment 1 of the present invention;

[0023] Figure 5 Assembly schematic diagram of the power wheel and the transmission unit in Embodiment 1 of the present invention;

[0024] Figure 6 Structural schematic diagram of the transmission part in Embodiment 1 of the present invention;

[0025] Figure 7 Structural schematic diagram of the compression assembly when it is in the expanded state in Embodiment 1 of the present invention;

[0026] Figure 8 Structural schematic diagram of the compression assembly in Embodiment 1 of the present invention;

[0027] Figure 9 Structural schematic diagram of the bracket loading device in Embodiment 2 of the present invention;

[0028] Figure 10 Structural schematic diagram of the bracket loading device in Embodiment 3 of the present invention.

[0029] The reference signs in the drawings are represented as follows:

[0030] 100, bracket loading device; 10, fixed seat; 11, fixed rod; 12, bottom plate; 13, mounting plate; 14, assembly window; 20, pressing and holding mechanism; 21, compression assembly; 211, compression part; 212, splicing corner; 213, first straight edge; 214, second straight edge; 215, compression plate; 216, driving pin; 217, fixing pin; 22, transmission unit; 221, transmission part; 2211, sliding seat; 2212, sliding block; 2213, guiding block; 2214, second guiding surface; 222, elastic part; 23, transmission disc assembly; 231, fixed disc; 2311, step part; 2312, sliding groove; 2313, first guiding surface; 2314, second track groove; 232, driving disc; 2321, clamping groove; 2322, rotating hole; 2323, first track groove; 24, first tooth part; 30, power source; 31, power wheel; 311, guiding hole; 312, hand wheel; 32, gear disc; 33, second tooth part; 34, driving part; 35, operation disc; 36, motor; 37, sensor; 40, sheath tube. Detailed Description of the Invention

[0031] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0033] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0034] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0035] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0036] It should be noted that the terms "distal end" and "proximal end" are used as orientation terms, which are commonly used terms in the field of interventional medical devices. The "distal end" refers to the end far from the operator during the surgical process, and the "proximal end" refers to the end close to the operator during the surgical process. The axial direction refers to the direction parallel to the line connecting the centers of the distal end and the proximal end of the medical device; the radial direction refers to the direction perpendicular to the above-mentioned axial direction.

[0037] Embodiment 1

[0038] Embodiment 1 of the present application provides a stent loading device 100, as Figures 1 to 8 shown, which includes a fixed seat 10, a plurality of pressing mechanisms 20 connected to the fixed seat 10, and a power source 30. The plurality of pressing mechanisms 20 are coaxially arranged in sequence along the axial direction. The pressing mechanism 20 includes a telescopic compression assembly 21 and a transmission unit 22 arranged between the power source 30 and the pressing mechanism 20. The power source 30 drives the compression assemblies 21 of the plurality of pressing mechanisms 20 to expand or contract in sequence through the transmission unit 22. When the compression assembly 21 expands, the stent can be fed into the gap of the compression assembly 21. When the compression assembly 21 contracts, radial compression of the stent can be achieved.

[0039] In this embodiment, as Figure 3 shown in Figure 4 and

[0040] shown in Figure 5 and Figure 6As shown, the transmission unit 22 includes a transmission member 221 and an elastic member 222. The inner side wall of the power wheel 31 is provided with a guide hole 311, which is arranged along the radial direction of the power wheel 31. The transmission member 221 is slidably connected to the guide hole 311. The elastic member 222 is arranged between the bottom wall of the guide hole 311 and the transmission member 221. The elastic member 222 is used to drive the transmission member 221 to move toward the driving disk 232, that is, the elastic member 222 provides a thrust to move the transmission member 221 toward the driving disk 232. The transmission member 221 is used to clamp the driving disk 232 under the elastic force of the elastic member 222. Among them, the multiple guide holes 311 corresponding to the multiple pressing and gripping mechanisms 20 are arranged at intervals along the axial direction of the power wheel 31. In this embodiment, the elastic member 222 is a spring.

[0041] like Figure 3 and Figure 4 As shown, the edge of the driving disk 232 is provided with a clamping groove 2321, and the clamping groove 2321 is used to adapt the transmission member 221. The transmission member 221 includes a sliding seat 2211 and a sliding block 2212 arranged on the sliding seat 2211 and abutting against the driving disk 232. When the sliding block 2212 is located in the clamping groove 2321 and abuts against the side wall of the clamping groove 2321, the driving disk 232 can rotate in the circumferential direction driven by the transmission member 221. When the driving disk 232 rotates, the driving disk 232 can drive the compression assembly 21 to expand or contract.

[0042] The edge of the fixed disk 231 is provided with a step portion 2311 arranged in an arc shape, and the step portion 2311 extends toward the direction of the driving disk 232. The inner cavity defined by the fixed disk 231, the step portion 2311 and the driving disk 232 is used to assemble the compression assembly 21. Among them, the step portion 2311 is provided with a sliding groove 2312, and the end surface of the sliding groove 2312 is provided with an inclined first guide surface 2313. The transmission member 221 also includes a guide block 2213 arranged on the sliding seat 2211, and the guide block 2213 is used to abut the fixed disk 231. The side of the guide block 2213 facing the first guide surface 2313 is provided with an inclined second guide surface 2214. The first guide surface 2313 and the second guide surface 2214 have the same inclination direction, so that the transmission member 221 can move along the first guide surface 2313 to the outer end surface of the step surface.

[0043] Among them, the thickness of the step portion 2311 is greater than or equal to the groove depth of the clamping groove 2321. Therefore, when the transmission member 221 slides from the sliding groove 2312 along the first guide surface 2313 to the outer end surface of the step, the sliding block 2212 disengages from the clamping groove 2321. At this time, the movement of the sliding block 2212 will not drive the driving disk 232 to rotate.

[0044] The fixed base 10 includes a bottom plate 12 and a mounting plate 13 disposed on one side of the bottom plate 12. A fixing rod 11 is provided on the mounting plate 13. A rotating hole 2322 is provided on the driving disk 232. After the fixing rod 11 passes through the rotating hole 2322, it is fixedly connected to the fixed disk 231. The rotating hole 2322 is arranged in an arc shape centered on the rotating shaft of the power wheel 31. Along the direction from near the mounting plate 13 to far from the mounting plate 13, the circumferential angles of the sliding grooves 2312 and the clamping grooves 2321 of the plurality of pressing mechanisms 20 increase in sequence. Thus, when the power wheel 31 rotates, the compression components 21 of the several sequentially arranged pressing mechanisms 20 can be unfolded in sequence.

[0045] Combined with 3 and Figure 7 As shown, the differences in the circumferential angles between the sliding grooves 2312 and the clamping grooves 2321 of the plurality of pressing mechanisms 20 themselves are the same, so that the compression components 21 of the plurality of pressing mechanisms 20 can be unfolded evenly in sequence. In this embodiment, the bracket loading device 100 includes six groups of compression components 21, and the difference in the circumferential angle between adjacent sliding grooves 2312 is 15 degrees. It should be noted that the number of compression components 21 and the difference in the circumferential angle between adjacent sliding grooves 2312 can be set according to actual needs, and the present application does not specifically limit.

[0046] As Figure 3 and Figure 4 shown, an assembly window 14 is axially provided on the mounting plate 13, and the assembly window 14 communicates with the compression component 21. A plurality of fixing rods 11 are provided on the mounting plate 13, and the plurality of fixing rods 11 are circumferentially spaced around the assembly window 14, and the fixing rods 11 pass through the rotating holes 2322. The rotating holes 2322 and the fixing rods 11 define the axis of rotation of the driving disk 232. So that the driving disk 232 can rotate around the center of the assembly window 14, and the contraction center of the compression component 21 is also located at the center of the assembly window 14.

[0047] Combined with Figure 4 and Figure 8 shown, the compression component 21 includes a plurality of compression members 211. The inner sides of the plurality of compression members 211 are spliced into an equilateral polygon shape. The compression members 211 are arranged in a sheet shape. A splicing angle 212 is provided at the tail end of the compression member 211. An equilateral polygon is defined between the plurality of compression members 211 through the splicing angle 212. The splicing angle 212 includes a first straight side 213 and a second straight side 214 arranged at an angle. The first straight side 213 and the second straight side 214 extend along the sides of the equilateral polygon spliced by the inner sides of the plurality of compression members 211 respectively. In this embodiment, the compression component 21 includes six circumferentially arranged compression members 211.

[0048] Specifically, a compression plate 215 is arranged in the direction of the center of the power wheel 31 for the compression member 211. The end face of the compression plate 215 extends along the axial direction of the drive disk 232. Thus, when a plurality of compression plates 215 converge, the bracket can be pressed and held from the side of the bracket.

[0049] A first track groove 2323 is arranged on the drive disk 232. The first track groove 2323 is arranged radially on the drive disk 232. A drive pin 216 is arranged on the side of the compression member 211 facing the drive disk 232. The drive pin 216 is embedded in the first track groove 2323 and slides along the first track groove 2323. A second track groove 2314 is arranged on the fixed disk 231. The shape of the second track groove 2314 is the same as the equilateral polygon formed by splicing the inner sides of a plurality of compression members 211. A fixed pin 217 is arranged on the side of the compression member 211 facing the fixed disk 231. The fixed pin 217 is embedded in the second track groove 2314 and slides along the second track groove 2314. Under the common limitation of the first track groove 2323 and the second track groove 2314, when the drive disk 232 rotates, it drives a plurality of compression members 211 to expand or contract.

[0050] The specific loading process of this embodiment includes the following three parts: an initial stage, a compression stage, and a release and loading stage.

[0051] Initial stage: The power wheel 31 drives all transmission members 221 and elastic members 222 to rotate (counterclockwise rotation in the figure). When rotating to a certain angle, when the sliding block 2212 of the transmission member 221 contacts the inner wall of the clamping groove 2321 of the drive disk 232, it drives the drive disk 232 to rotate. It should be noted that the angle at which the power wheel 31 starts to drive a single drive disk 232 to rotate is related to the number of groups of the compression assembly 21 and the angle setting of the groove distribution on the fixed disk 231 and the drive disk 232. In this embodiment, its rotation angle is 15 degrees. The compression assembly 21 expands outward under the combined action of the track grooves of the drive disk 232 and the fixed disk 231. When continuing to rotate until the second guiding surface 2214 of the transmission member 221 of each compression assembly 21 is mutually pressed against the first guiding surface 2313 on the side of the sliding groove 2312 of the fixed disk 231, the elastic member 222 contracts, and the sliding block 2212 of the transmission member 221 disengages from the clamping groove 2321 of the drive disk 232. All compression assemblies 21 are in an open state and at the maximum space.

[0052] Compression stage: After placing the stent into the inner cavity of the expanded compression assembly 21 from the assembly window 14, the driving power wheel 31 drives all the transmission parts 221 and elastic parts 222 to rotate in opposite directions (clockwise in the figure). When the second guiding surface 2214 of the transmission part 221 disengages from the first guiding surface 2313 on the fixed disk 231, the elastic part 222 is released, and the transmission part 221 pops out towards the center and makes one end of the sliding block 2212 enter the clamping groove 2321 of the driving disk 232. At this time, multiple transmission parts 221 simultaneously abut against the other side wall of their respective corresponding clamping grooves 2321, so that the power wheel 31 can drive multiple driving disks 232 to rotate together. Under the combined action of the driving disk 232 and the track grooves of the fixed disk 231, the compression assembly 21 contracts inward, thereby completing a one-time crimping of the stent, and simultaneously compressing each position in the axial direction of the stent to the target radial compression size of the stent. The proximal end of the compressed stent is exposed on one side of the assembly window 14. Before sheathing, the proximal end of the stent is first manually loaded into the sheath tube 40.

[0053] Release and loading stage: The driving power wheel 31 drives all the transmission parts 221 and elastic parts 222 to rotate again (counterclockwise in the figure). When the sliding block 2212 of the transmission part 221 contacts the inner wall of the clamping groove 2321 on the driving disk 232 in its rotation direction, the power wheel 31 drives the nearest set of driving disks 232 to rotate together. Under the combined action of the first track groove 2323 and the second track groove 2314 of the driving disk 232 and the fixed disk 231, the compression assembly 21 expands outward. Since the distribution angles of the clamping grooves 2321 of the driving disks 232 and the sliding grooves 2312 of the fixed disk 231 in each compression assembly 21 are in a progressive relationship, at this time, the sliding block 2212 of the transmission part 221 in the next compression assembly 21 does not contact the inner wall of the clamping groove 2321 on the driving disk 232 in its rotation direction, so the compression assembly 21 remains stationary. In this embodiment, the included angle between adjacent sliding grooves 2312 and clamping grooves 2321 in the circumferential direction is progressive at 15 degrees, that is, every time the power wheel 31 rotates 15 degrees, the next set of transmission disk assemblies 23 can be driven to move.

[0054] At this time, since the compression assembly 21 far from the mounting plate 13 is still in a contracted state, the stent is still in a contracted state at this position. At this time, the sheath tube 40 approaches the crimped stent (as Figure 1As shown in the figure, the stent part released after expanding the first compression assembly 21 is received into the sheath tube 40. Then, the driving power wheel 31 drives all the transmission parts 221 and the elastic parts 222 to continue rotating (counterclockwise in the figure). When the next compression assembly 21 expands outward under the combined action of the transmission part 221, the driving disc 232 and the fixed disc 231, the sheath tube 40 continues to be inserted into the inside of the crimping mechanism 20 from the assembly window 14, so as to receive the stent part released after expanding the second compression assembly 21 into the sheath tube 40. Repeat the above steps until the stent is completely loaded into the sheath tube 40 to complete the loading.

[0055] During this entire process, the power wheel 31 drives each group of driving discs 232 to rotate until the second guiding surface 2214 of the transmission part 221 contacts the first guiding surface 2313 on the side of the sliding groove 2312 of the fixed disc 231, causing the corresponding elastic part 222 to contract and making the released compression assembly 21 in the maximum open state.

[0056] In this application, since multiple crimping mechanisms 20 can expand in sequence and contract simultaneously, it enables the doctor to achieve continuous crimping at one time during the stent installation process and gradually load the stent into the sheath, so as to complete the stent loading work efficiently and with consistency in an automatic or semi-automatic manner, thereby avoiding problems such as stent diameter reduction and uneven local stacking after loading, and improving the assembly efficiency.

[0057] Embodiment 2

[0058] Embodiment 3 of the present application provides a stent loading device 100, as Figure 9 shown. The same parts of Embodiment 2 and Embodiment 1 will not be described in detail. The difference between Embodiment 2 and Embodiment 1 lies in the different structure of the power source 30. As Figure 3 shown, the power source 30 includes a plurality of gear discs 32 radially arranged on one side of the plurality of crimping mechanisms 20 and a driving member 34. The driving member 34 includes an operation disc 35 coaxially arranged with the gear discs 32. The plurality of gear discs 32 are coaxially arranged. The operation disc 35 is used to drive the plurality of gear discs 32 to rotate coaxially, and the crimping mechanisms 20 correspond to the gear discs 32 one by one.

[0059] The outer edge of the crimping mechanism 20 is provided with a first tooth part 24. Specifically, the first tooth part 24 is arranged on the outer peripheral surface of the driving disc 232. The outer edge of the gear disc 32 is provided with a second tooth part 33 meshing with the first tooth part 24. The second tooth part 33 covers a part of the outer peripheral surface of the gear disc 32. The second tooth parts 33 of the plurality of gear discs 32 are arranged in a preset phase dislocation along the circumferential direction in sequence. In this embodiment, the second tooth part 33 covers one-sixth of the fan surface of the rotating disc, that is, the circumferential angle of the second tooth part 33 is 60 degrees, and the preset phase difference between the second tooth parts 33 of adjacent gear discs 32 is 15 degrees.

[0060] When the operation panel 35 drives multiple gear discs 32 to rotate simultaneously, due to the phase difference of the second tooth parts 33 of adjacent gear discs 32, the multiple gear discs 32 can drive the corresponding drive discs 232 to rotate in sequence, so that the corresponding compression components 21 are deployed in sequence. When the operation panel 35 drives the multiple gear discs 32 to rotate in opposite directions, the compression components 21 can also contract in sequence to compress the bracket.

[0061] The specific loading process of this embodiment includes the following three parts: initial stage, compression stage, and release and loading stage.

[0062] Initial stage: The operation panel 35 drives multiple gear discs 32 to rotate simultaneously (clockwise rotation in the figure). The drive disc 232 closest to the operation panel 35 in the compression component 21 first meshes and drives the drive disc 232 to rotate (counterclockwise in the figure). The corresponding compression component 21 expands outward under the combined action of the drive disc 232 and the fixed disc 231. The remaining compression components 21 are sequentially engaged with the first tooth parts 24 of the corresponding drive discs 232 according to the distribution of the second tooth parts 33, completing the expansion of the compression components 21.

[0063] When the second tooth part 33 of the gear disc 32 disengages from the first tooth part 24 of the drive disc 232, the compression component 21 expands to the maximum space, and the drive disc 232 stops moving after disengaging. When the last compression component 21 disengages from the gear disc 32, all compression components 21 are in the open state and at the maximum space.

[0064] Compression stage: The operation panel 35 drives multiple gear discs 32 to rotate synchronously (counterclockwise rotation in the figure). The first tooth parts 24 of the drive discs 232 of the multiple compression components 21 closest to the fixed seat 10 first engage with the second tooth parts 33 of the corresponding gear discs 32, thereby driving the drive discs 232 to rotate (clockwise in the figure). The compression component 21 closest to the fixed seat 10 contracts inward under the combined action of its drive disc 232 and the fixed disc 231. The remaining compression components 21 are sequentially engaged with the first tooth parts 24 of the corresponding drive discs 232 according to the distribution of their respective second tooth parts 33, completing the contraction of the compression components 21.

[0065] When the second tooth part 33 of the gear disc 32 disengages from the first tooth part 24 of the drive disc 232, the compression component 21 contracts to the radial compression size of the target bracket. The drive disc 232 stops moving after disengaging. When the last compression component 21 disengages from the gear disc 32, all compression components 21 are at the radial compression size of the target bracket.

[0066] Release and loading stage: The release and loading stage has the same movement pattern as the initial stage. After the compression assembly 21 on the side close to the sheath 40 expands, the sheath 40 approaches the stent, and the stent released by the first compression assembly 21 is received into the sheath 40. The operation disk 35 drives the gear disk 32 to continue rotating, repeating the sheath 40 loading movement until all stents are loaded.

[0067] Embodiment 3

[0068] Embodiment 3 of the present application provides a stent loading device 100, as Figure 10 shown. The similarities between Embodiment 3 and Embodiment 2 will not be elaborated here. The difference between Embodiment 3 and Embodiment 2 lies in the structure of the power source 30. Among them, the driving member 34 includes a motor 36 and a sensor 37. The sensor 37 calculates the rotation angle by monitoring the number of teeth passed by the first tooth portion 24, thereby controlling the start and stop of the motor 36. Both the first tooth portion 24 and the second tooth portion 33 are integral circles in the circumferential direction.

[0069] Among them, the motor 36 drives the gear disk 32 to rotate, and meshes with the first tooth portion 24 of the driving disk 232 through the second tooth portion 33, thereby providing power for the driving disk 232. Each gear disk 32 is provided with a separate motor 36. The motor 36 can start and stop at any angle. The sensor 37 monitors the number of teeth of the first tooth portion 24 on the passing driving disk 232 and converts it into the rotation angle of the driving disk 232 through calculation. To implement the calculation function of the sensor 37, the sensor 37 is also connected to a control system. The control system controls the start and stop and rotation direction of the motor 36 through the signal fed back by the sensor 37, thereby completing the expansion and compression movement of the compression assembly 21.

[0070] In this embodiment, all motors 36 drive the driving disk 232 to rotate, and the compression assembly 21 expands to the maximum state under the combined action of the fixed disk 231 and the driving disk 232. After placing the stent into the multiple crimping mechanisms 20, the motor 36 drives the driving disk 232 to rotate in the reverse direction to compress all the compression assemblies 21. The control system receives the change in the number of teeth of the first tooth portion 24 through the sensor 37, and converts the change in the number of teeth into an angular change, thereby controlling the start and stop of the motor 36 until the stent is compressed to the target size.

[0071] At this time, multiple motors 36 respectively control the corresponding gear disks 32 to control the driving disk 232 to rotate a preset angle, so that the compression assembly 21 expands to the preset size. In this embodiment, the preset angle is 60 degrees. During this process, the sheath 40 is controlled to move towards the stent to complete the stent loading of a single compression assembly 21 segment. When the stent assembly is completed, multiple motors 36 respectively control the corresponding gear disks 32 to rotate until the compression assembly 21 expands to the maximum state.

[0072] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A stent loading device, characterized in that, It includes a fixed seat, a plurality of pressing mechanisms connected to the fixed seat, and a power source. The plurality of pressing mechanisms are coaxially arranged in sequence along the axial direction. The pressing mechanism includes a telescopic compression component and a transmission unit arranged between the power source and the pressing mechanism. The power source drives the compression components of the plurality of pressing mechanisms to expand or contract in sequence through the transmission unit.

2. The stent loading device according to claim 1, wherein The power source includes a power wheel rotatably connected to the fixed seat. The plurality of pressing mechanisms are all arranged inside the power wheel. The transmission unit is arranged between the power wheel and the pressing mechanism. The pressing mechanism further includes a transmission disc assembly. The transmission unit is connected to the power wheel and the transmission disc assembly. The transmission disc assembly includes a fixed disc and a driving disc. The compression component is movably connected between the fixed disc and the driving disc.

3. The stent loading device according to claim 2, wherein, The transmission unit includes a transmission part and an elastic part. The transmission part is used to engage with the driving disc under the drive of the elastic part. A guiding hole is arranged on the inner side wall of the power wheel. The guiding hole is arranged along the radial direction of the power wheel. The transmission part is slidably connected to the guiding hole. The elastic part is arranged between the bottom wall of the guiding hole and the transmission part. The elastic part is used to drive the transmission part to move towards the driving disc.

4. The stent loading device according to claim 3, characterized in that, A clamping groove is arranged on the edge of the driving disc. The transmission part includes a sliding seat and a sliding block arranged on the sliding seat and abutting against the driving disc. When the sliding block is located in the clamping groove and abuts against the side wall of the clamping groove, the driving disc can rotate circumferentially under the drive of the transmission part. An arc-shaped step part is arranged on the edge of the fixed disc. A sliding groove is arranged on the step part. An inclined first guiding surface is arranged on the end surface of the sliding groove. The transmission part further includes a guiding block arranged on the sliding seat and abutting against the fixed disc. An inclined second guiding surface is arranged on the side of the guiding block facing the first guiding surface. The thickness of the step part is greater than or equal to the depth of the clamping groove. When the transmission part slides from the sliding groove along the first guiding surface onto the step part, the sliding block disengages from the clamping groove.

5. The stent loading device according to claim 4, wherein, The fixed seat includes a bottom plate and a mounting plate arranged on one side of the bottom plate. A fixing rod is arranged on the mounting plate. A rotating hole is arranged on the driving disc. The fixing rod passes through the rotating hole and is fixedly connected to the fixed disc. The rotating hole is arranged in an arc shape with the axis of the power wheel as the center. Along the direction from near the mounting plate to far from the mounting plate, the circumferential angles of the sliding grooves and the clamping grooves of the plurality of pressing mechanisms increase in sequence. The differences in the circumferential angles of the sliding grooves and the clamping grooves of the plurality of pressing mechanisms themselves are the same.

6. The stent loading device according to claim 5, wherein The compression assembly includes a plurality of compression members. The inner sides of the plurality of compression members are spliced into an equilateral polygon shape. A splicing angle is provided at the tail end of the compression member. The splicing angle includes a first straight edge and a second straight edge arranged at an angle. The first straight edge and the second straight edge respectively extend along the sides of the equilateral polygon formed by splicing the inner sides of the plurality of compression members. A compression plate is provided on the compression member in the direction towards the center of the power wheel.

7. The stent loading device according to claim 6, wherein A first track groove is provided on the driving disk. The first track groove is arranged along the radial direction of the driving disk. A driving pin is provided on the side of the compression member facing the driving disk. The driving pin is embedded in the first track groove and slides along the first track groove. A second track groove is provided on the fixed disk. The shape of the second track groove is the same as that of the equilateral polygon formed by splicing the inner sides of the plurality of compression members. A fixing pin is provided on the side of the compression member facing the fixed disk. The fixing pin is embedded in the second track groove and slides along the second track groove.

8. The stent loading device according to claim 1, wherein The power source includes a plurality of gear disks radially arranged on one side of the plurality of pressing and holding mechanisms and a driving member. The plurality of gear disks are coaxially arranged. The driving member is used to drive the plurality of gear disks to rotate coaxially. The pressing and holding mechanisms correspond to the gear disks one by one. A first tooth portion is provided on the outer edge of the pressing and holding mechanism. A second tooth portion meshing with the first tooth portion is provided on the outer edge of the gear disk.

9. The stent loading device according to claim 8, wherein, The driving member includes an operation disk coaxially arranged with the gear disk. The second tooth portion covers a part of the outer peripheral surface of the gear disk. The second tooth portions of the plurality of gear disks are sequentially arranged with a preset phase dislocation along the circumferential direction.

10. The stent loading device according to claim 8, wherein, The driving member includes a motor and a sensor. The sensor calculates the rotation angle by monitoring the number of teeth passed by the first tooth portion, so as to control the start and stop of the motor.

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