CN115475008A - Multiplication mechanism and blood vessel intervention equipment - Google Patents

Multiplication mechanism and blood vessel intervention equipment Download PDF

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Publication number
CN115475008A
CN115475008A CN202210938378.0A CN202210938378A CN115475008A CN 115475008 A CN115475008 A CN 115475008A CN 202210938378 A CN202210938378 A CN 202210938378A CN 115475008 A CN115475008 A CN 115475008A
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Prior art keywords
platform
disposed
seat
connection
sliding
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CN202210938378.0A
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CN115475008B (en
Inventor
杨新健
王坤
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Shanghai Shenji Medical Technology Co ltd
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Shanghai Shenji Medical Technology Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/30—Surgical robots
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0116—Steering means as part of the catheter or advancing means; Markers for positioning self-propelled, e.g. autonomous robots
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/30—Surgical robots
    • A61B2034/301—Surgical robots for introducing or steering flexible instruments inserted into the body, e.g. catheters or endoscopes

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Robotics (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

The invention provides a multiplication mechanism and blood vessel intervention equipment, and belongs to the technical field of medical instruments. The invention can fully utilize the strokes of the first platform and the second platform and increase the propelling distance of the catheter under the condition of reducing the length and the size of the equipment, so that the vascular interventional equipment can be used for more types of interventional operations, the application range is wider, and meanwhile, the size of the vascular interventional equipment is smaller, more space does not need to be occupied, and the operation is more convenient.

Description

Multiplication mechanism and blood vessel intervention equipment
Technical Field
The invention relates to the technical field of medical instruments, in particular to a multiplication mechanism and vascular intervention equipment.
Background
In the treatment of cardiovascular diseases using vascular interventional devices such as surgical robots, etc., during the vascular interventional procedure, it is necessary to use a sheath catheter such as a long sheath and an inner catheter such as a balloon catheter, etc., the sheath catheter and the inner catheter are often used in a nested manner, the outer diameter of the inner catheter is small, the inner diameter of the sheath catheter is large, the inner catheter can be inserted into the sheath catheter, the sheath catheter can provide a predetermined path in the body, and then the inner catheter is fed into the sheath catheter, and in general, the inner catheter is longer than the sheath catheter in order to enable the thinner inner catheter to enter a smaller blood vessel.
When the automatic propelling of pipe is carried out to application vascular intervention equipment, must control the propulsion of sheath pipe and inner catheter respectively, in the nested formula propulsion process of pipe, sheath pipe and inner catheter need keep tandem relative position, and the propulsion distance of inner catheter need be greater than the propulsion distance of sheath pipe, consequently, vascular intervention equipment need have sufficient stroke scope to satisfy the propulsion of inner catheter, just so lead to vascular intervention equipment's size often bigger, need occupy great space, very influence the operation.
At present, in order to reduce the size of equipment, some vascular intervention equipment can limit the propelling distance of an inner catheter, so that the automatic propelling of the catheter can be realized, the operation range is limited, and operations with focus on coronary artery can be performed only, and the application range of the equipment is greatly limited due to the short propelling distance of the inner catheter.
Disclosure of Invention
The technical problem solved by the invention is how to reduce the size of the vascular access device while increasing the catheter advancement distance.
In order to solve the above problems, the present invention provides a multiplication mechanism for pushing a sheath catheter and/or an inner catheter, wherein at least a portion of the inner catheter is inserted into the sheath catheter along a first direction, the multiplication mechanism includes a fixed base, a first platform and a second platform, the first platform is disposed on the fixed base and slidably connected to the fixed base along the first direction, the second platform is disposed on the first platform and slidably connected to the first platform along the first direction, the first platform is used for fixing the sheath catheter, and the second platform is used for fixing the inner catheter.
Optionally, the fixed base includes a base body and a first chute, the first chute is disposed on a side end surface of the base body facing the first platform, the first platform includes a first platform body and a first slide rail, the first slide rail is disposed on a side end surface of the first platform body facing the fixed base, and the first slide rail is matched with the first chute.
Optionally, the multiplication mechanism further includes a first driving structure disposed between the fixed base and the first platform and configured to drive the first platform to move along the first direction.
Optionally, the first driving structure includes a first lead screw and a first lead screw seat, the first lead screw is disposed on a side end surface of the base body facing the first table body, the first lead screw seat is disposed on a side end surface of the first table body facing the base body, and the first lead screw is in threaded connection with the first lead screw seat.
Optionally, the second platform includes a second platform body and a connecting seat, and the connecting seat is disposed on the second platform body and is used for being slidably connected with the first platform body.
Optionally, the first platform further includes a second slide rail, the second slide rail is disposed on an end surface of the first platform body, the end surface being far away from the second platform, one part of the connecting seat is connected to the second platform body, and the other part of the connecting seat is used for being slidably connected to the second slide rail.
Optionally, the first table body includes a strip-shaped groove structure, the strip-shaped groove structure is arranged along the first direction, the connecting seat includes a seat body, a connecting portion and a second sliding groove, the connecting portion is arranged on the seat body and used for passing through the strip-shaped groove structure to be connected with the second table body, and the second sliding groove is arranged on the seat body and connected with the second sliding rail in a sliding manner.
Optionally, the first platform further includes a limiting plate, the limiting plate is disposed on the first platform body and located on one side of the strip-shaped groove structure, and the limiting plate is used for limiting the connecting portion to move in a direction perpendicular to the first direction.
Optionally, the multiplication mechanism further comprises a second driving structure, and the second driving structure is arranged on the first table body and is in driving connection with the connecting seat.
Compared with the prior art, the invention has the following beneficial effects:
the first platform is arranged on the fixed base and is in sliding connection with the fixed base along the first direction, the second platform is arranged on the first platform and is in sliding connection with the fixed base along the first direction, the first platform is used for fixing the sheath catheter, the second platform is used for fixing the inner catheter, at least one part of the inner catheter penetrates through the sheath catheter along the first direction, when the first platform slides on the fixed base along the first direction, the sheath catheter, the second platform and the inner catheter can be driven to move, pushing of the sheath catheter and the inner catheter can be achieved, when the second platform slides on the first platform along the first direction, the inner catheter can be driven to move to further push the inner catheter, therefore, under the condition that the length size of the device is reduced, the stroke of the first platform and the stroke of the second platform are fully utilized, the pushing distance of the catheter is increased, the blood vessel interventional device can be used for interventional operations of more types, the application range is wider, meanwhile, the size of the blood vessel interventional device is smaller, more space does not need to be occupied, and the operation is more convenient.
Another object of the present invention is to provide a vascular access device that solves the problem of how to reduce the size of the vascular access device while increasing the catheter advancement distance.
In order to solve the above problems, the technical solution of the present invention is realized as follows:
a vascular access device comprising a multiplication mechanism as described above.
The vascular access device and the multiplication mechanism have the same advantages compared with the prior art, and are not described in detail here.
Drawings
FIG. 1 is a schematic structural diagram of a vascular access device and catheter in an embodiment of the present invention;
FIG. 2 is an enlarged view of the embodiment of the present invention at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a vascular access device in an embodiment of the present invention;
FIG. 4 is an enlarged view of the embodiment of the present invention at B in FIG. 3;
FIG. 5 is an enlarged view of the embodiment of the present invention at C in FIG. 3;
FIG. 6 is a schematic structural diagram of another perspective of a vascular access device in an embodiment of the present invention;
FIG. 7 is an enlarged view of the embodiment of the present invention at D in FIG. 6;
fig. 8 is a structural schematic diagram of another view of the vascular access device in the embodiment of the present invention;
FIG. 9 is an enlarged view of the embodiment of the present invention shown in FIG. 8 at E.
Description of reference numerals:
1. a fixed base; 11. a base body; 12. a first chute; 2. a first platform; 21. a first stage body; 211. a strip-shaped groove structure; 22. a first slide rail; 23. a second slide rail; 24. a limiting plate; 3. a second platform; 31. a second stage body; 32. a connecting seat; 321. a base body; 322. a connecting portion; 323. a second chute; 4. a first drive structure; 41. a first lead screw; 5. a second drive structure; 100. a sheath catheter; 200. an inner conduit.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it is to be understood that the forward direction of "X" in the drawings represents the left direction, and correspondingly, the reverse direction of "X" represents the right direction; the forward direction of "Y" represents forward, and correspondingly, the reverse direction of "Y" represents rearward; the forward direction of "Z" represents the upward direction, and correspondingly, the reverse direction of "Z" represents the downward direction, and the directions or positional relationships indicated by the terms "X", "Y", "Z", etc. are based on the directions or positional relationships shown in the drawings of the specification, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular direction, be constructed and operated in a particular direction, and thus should not be construed as limiting the present invention.
The terms "first" and "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In order to solve the above problem, an embodiment of the present invention provides a multiplication mechanism for pushing a sheath catheter 100 and/or an inner catheter 200, wherein the inner catheter 200 is at least partially inserted into the sheath catheter 100 along a first direction, and includes a fixed base 1, a first platform 2 and a second platform 3, the first platform 2 is disposed on the fixed base 1 and is slidably connected with the fixed base 1 along the first direction, the second platform 3 is disposed on the first platform 2 and is slidably connected with the first platform 2 along the first direction, the first platform 2 is used for fixing the sheath catheter 100, and the second platform 3 is used for fixing the inner catheter 200.
As shown in fig. 1 and 3, the fixed base 1 is a supporting structure for supporting the first platform 2 and the second platform 3, and may be a structure fixed at a certain surgical position and may also be a structure such as a mechanical arm of a surgical robot system, when the mechanical arm moves to a predetermined surgical position, the fixed base can stay at a predetermined position and can be kept at a fixed posture, the fixed base 1 and the first platform 2 and the second platform 3 can be slidably connected by a sliding pair, a sliding slot, a roller, or other structures, the sheath catheter 100 and the inner catheter 200 can be respectively fixed on the first platform 2 and the second platform 3 by a clamp or other structures, and the first platform 2 and the second head can also be provided with a fixing seat for fixing the sheath catheter 100 and the inner catheter 200.
In this embodiment, fixed baseplate 1 is for carrying on the bearing structure on surgical robot system arm, and bearing structure can be for surgical robot system's arm axial rotation to when carrying out the pipe propelling movement, can adjust the propelling movement angle of first platform 2 and second platform 3 according to vascular trend, make the pipe propelling movement more smooth-going.
Fixing seats are respectively arranged at the middle positions of the front parts of the first platform 2 and the second platform 3, for convenience of description, the fixing seats can be respectively called as a first fixing seat and a second fixing seat, the first fixing seat and the second fixing seat are arranged in the front and back direction along the first direction, the rear part of the sheath catheter 100 is fixed on the first fixing seat, the rear part of the inner catheter 200 is fixed on the second fixing seat, and the front part of the inner catheter 200 is sleeved in the sheath catheter 100.
It should be noted that, in order to push the inner catheter 200 smoothly in the sheath catheter 100, the clamping height of the inner catheter 200 on the second fixing seat and the clamping height of the sheath catheter 100 on the first fixing seat should be consistent.
As shown in fig. 1, the first direction in this embodiment is the Y-axis direction, and the clamping height of the inner catheter 200 on the second fixing base and the clamping height of the sheath catheter 100 on the first fixing base are the distances from the respective clamping points to the upper end surface of the first platform 2 in the Z-axis direction.
In this way, by arranging the first platform 2 on the fixed base 1 and slidably connecting with the first platform 2 along the first direction, arranging the second platform 3 on the first platform 2 and slidably connecting with the first platform along the first direction, wherein the first platform 2 is used for fixing the sheath catheter 100, the second platform 3 is used for fixing the inner catheter 200, at least a part of the inner catheter 200 penetrates through the sheath catheter 100 along the first direction, when the first platform 2 slides on the fixed base 1 along the first direction, the sheath catheter 100, the second platform 3 and the inner catheter 200 can be driven to move, so that the sheath catheter 100 and the inner catheter 200 can be pushed, and when the second platform 3 slides on the first platform 2 along the first direction, the inner catheter 200 can be driven to move so as to further push the inner catheter 200, therefore, the stroke of the first platform 2 and the second platform 3 can be fully utilized under the condition of reducing the length and size of the device, the pushing distance of the catheter can be increased, so that the vascular device can be used for more types of operations, is wider in application range, and the size of the vascular interventional device occupies less space, and is more convenient for operation.
Optionally, the fixed base 1 includes a base body 11 and a first sliding groove 12, the first sliding groove 12 is disposed on a side end surface of the base body 11 facing the first platform 2, the first platform 2 includes a first platform 21 and a first sliding rail 22, the first sliding rail 22 is disposed on a side end surface of the first platform 21 facing the fixed base 1, and the first sliding rail 22 is matched with the first sliding groove 12.
As shown in fig. 1, 3 and 4, the first sliding groove 12 may be directly disposed on the base body 11, or may be fixed on the base body 11 by welding, riveting or bolting using a slider with a groove structure, a notch of the first sliding groove 12 may face the first platform 2, or may face both sides of the base body 11, accordingly, the first sliding rail 22 may be fixed on the first platform 21 by welding, riveting or bolting, and the first sliding rail 22 may be disposed on an end surface of the first platform 21 facing the fixed base 1, or may be disposed on both sides of the first platform 21.
In this embodiment, because other structures need to be installed between the first platform 2 and the fixed base 1, therefore, the first platform 21 adopts a structure in which the bottom is provided with an installation space, the first platform 21 is composed of a top plate, a surrounding plate, a rib plate, and a bottom plate, and the like, wherein the surrounding plate is formed by surrounding a front side plate, a left side plate, a rear side plate, and a right side plate, and may be formed as an integral body, and may also be connected by welding, riveting, or bolting, and the like, the top plate is disposed above the surrounding plate to form a table top of the first platform 2, the rib plate is disposed along the length direction of the first platform 2, the plurality of rib plates are disposed along the width direction of the first platform 2 at intervals to separate the bottom space of the first platform 2 into a plurality of installation spaces, the bottom plate may be disposed in plurality, and the plurality of bottom plates may be connected with the side plate and the rib plate of the surrounding plate, respectively, thereby capping part or all of the installation spaces.
Note that the longitudinal direction of the first platform 2 is the Y-axis direction, the width direction of the first platform 2 is the X-axis direction, and if a bottom plate needs to be provided in the installation space where the first chute 12 and the first slide rail 22 are installed, a space for the slider to move needs to be provided in the bottom plate in the installation space.
The first sliding groove 12 is a sliding block with a sliding groove, the sliding block is fixed on the end face, facing the first platform 2, of the base body 11 through a bolt, the first sliding rail 22 is arranged on the side face of the rib plate of the first platform body 21, so that the bottom of the first platform body 21 can be close to the upper end face of the base body 11 as far as possible, and the overall height of the device is reduced.
It should be noted that, in order to prevent the first platform 2 from shaking left and right on the fixed base 1, at least two sets of the first slide rail 22 and the first slide groove 12 should be provided, and the two sets of the first slide rail 22 and the first slide groove 12 are provided at intervals along the width direction of the first platform 2, preferably, the first slide groove 12 may adopt a structure with a cross-sectional shape similar to a C shape, and the cross-sectional shape of the first slide rail 22 is matched with the structure, so that the first slide rail 22 is not easily separated from the first slide groove 12, and the first platform 2 slides more stably.
Optionally, the multiplication mechanism further comprises a first driving structure 4, and the first driving structure 4 is disposed between the fixed base 1 and the first platform 2 and is used for driving the first platform 21 to move along the first direction.
As shown in fig. 3, 5, 6 and 8, the first driving structure 4 is disposed in the installation space of the first platform 2, may be disposed outside the two sets of first slide rails 22 and the first sliding grooves 12, or may be disposed in the middle of the two sets of first slide rails 22 and the first sliding grooves 12, and the first driving structure 4 may be a screw rod structure, a small cylinder, a small oil cylinder, or the like, which is not limited herein.
In this embodiment, since the second platform 3 is further mounted on the first platform 2, and the second platform 3 needs to move relative to the first platform 2 along the first direction, and the second driving structure 5 needs to be disposed at the bottom of the first platform 2 for driving the second platform 3 to move, in order to prevent the first driving structure 4 and the second driving structure 5 from interfering with each other, the first driving structure 4 may be disposed in the middle of the installation space of the first platform 2 and between the two sets of first sliding rails 22 and the first sliding grooves 12, so that when the first driving structure 4 drives the first platform 2 to move, the first platform 21 is more uniformly stressed, and the two sets of first sliding rails 22 and the first sliding grooves 12 slide more smoothly.
Optionally, the first driving structure 4 includes a first lead screw 41 and a first lead screw 41 seat (not shown), the first lead screw 41 is disposed on a side end surface of the base body 11 facing the first table body 21, the first lead screw 41 seat is disposed on a side end surface of the first table body 21 facing the base body 11, and the first lead screw 41 is in threaded connection with the first lead screw 41 seat.
As shown in fig. 5, 6 and 8, in this embodiment, the first driving structure 4 is a structure composed of a first lead screw 41 and a first lead screw 41 seat, the first lead screw 41 is disposed in the middle of the installation space of the first platform 2 and is connected to the motor through a transmission member, the first lead screw 41 seat is disposed on the base body 11 and located between the two sliders, a screw hole is disposed on the first lead screw 41 seat, the first lead screw 41 passes through the screw hole and is connected to the first lead screw 41 seat through a thread, and the first platform 21 is driven to slide along the first direction by the rotation of the lead screw driven by the motor.
Compared with the structure of a small air cylinder or a small oil cylinder, the structure of the first driving structure 4 is composed of the first lead screw 41 and the first lead screw 41 seat, when the equipment is shut down due to an accident, the first lead screw 41 can be rapidly rotated in a manual mode for emergency treatment, and the safety of the equipment can be improved.
Alternatively, the second platform 3 includes a second platform body 31 and a connecting seat 32, and the connecting seat 32 is provided on the second platform body 31 and is used for slidably connecting with the first platform body 21.
As shown in fig. 1, 3, 6 and 7, in this embodiment, the second platform 31 is disposed on the first platform 21, and a gap is left between the bottom of the second platform and the first platform 21 to facilitate the second platform 31 to move along the first direction relative to the first platform 21, the second platform 31 has a structure similar to the first platform 21 and a bottom mounting space for mounting a corresponding structure, and the difference is that in order to make the clamping height of the second fixing seat mounted on the second platform 3 closer to the clamping height of the first fixing seat mounted on the first platform 2 as much as possible, the middle portion of the second platform 31 is in a downward concave shape, so that the mounting space at the bottom of the second platform 3 is located at two sides, the connection seat 32 is disposed at the bottom of the second platform 31 and can be fixed by welding, riveting or bolting, and the connection is not limited herein, and the second platform 31 is slidably connected to the first platform 21 through the connection seat 32.
It should be noted that the connection seat 32 may be disposed on two sides of the bottom of the second platform 31, and is wound from the bottom of the side plate of the first platform 21 to the installation space at the bottom of the first platform 2 to be slidably connected with the first platform 21, the connection seat 32 may also be disposed at the middle position of the bottom of the second platform 31, and a moving space is disposed on the top plate of the first platform 21, and the connection seat 32 passes through the moving space on the top plate of the first platform 21 to enter the installation space at the bottom of the first platform 2 to be slidably connected with the first platform 21, and may be specifically disposed as required, which is not limited herein.
Optionally, the first platform 2 further includes a second slide rail 23, the second slide rail 23 is disposed on a side end surface of the first platform 21 away from the second platform 3, the first platform 21 includes a strip-shaped groove structure 211, the strip-shaped groove structure 211 is disposed along the first direction, the connection seat 32 includes a seat body 321, a connection portion 322 and a second slide groove 323, the connection portion 322 is disposed on the seat body 321 and is used for passing through the strip-shaped groove structure 211 to be connected with the second platform 31, and the second slide groove 323 is disposed on the seat body 321 and is slidably connected with the second slide rail 23.
As shown in fig. 2, fig. 6, fig. 7, fig. 8, and fig. 9, in this embodiment, since structures such as handrails are further disposed on two sides of the first platform 2, in order to make the bottom of the second platform 31 approach the top of the first platform 21 as much as possible, reduce the height of the device, and make full use of the width space of the device, the width of the second platform 31 may be set to be slightly larger than the width of the first platform 21, a strip-shaped groove structure 211 along the first direction is disposed on a side plate of the first platform 21, the connecting seat 32 is fixed at the bottom of the side plate of the second platform 31 by bolts and penetrates through the strip-shaped groove structure 211 to extend into the installation space on two sides of the bottom of the first platform 2, a second slide rail 23 is disposed on an inner wall of the side plate of the first platform 21, a second slide groove 323 is disposed on the connecting seat 32, the second slide rail 23 is matched with a second slide sleeve to realize the sliding connection between the second platform 3 and the first platform 2, and the structures, the number and the arrangement manners of the second slide rail 23 and the second slide rail 323 are no longer similar to the first slide rail 22 and the first slide groove 12, and are no longer described herein.
It should be noted that the connecting seat 32 is composed of a seat body 321, a connecting portion 322, a second sliding groove 323, and the like, the seat body 321 may be a block-shaped or plate-shaped structure, the second sliding groove 323 may be directly disposed on the seat body 321, or a slider with a groove structure may be fixed on the seat body 321 by welding, riveting, or bolt connection, and the connecting portion 322 is connected to the bottom of the side plate of the second platform 31 and needs to penetrate through the strip-shaped groove structure 211 on the side plate of the first platform 21 to extend into the installation space on both sides of the bottom of the first platform 2, so that the connecting portion 322 needs to be provided with at least one bend.
In addition, in order to facilitate driving the second platform 3 to move, the threaded sleeve of the second driving structure 5 may be disposed on the seat body 321 of the connecting seat 32, and the screw rod is engaged with the threaded sleeve to drive the connecting seat 32 to drive the second platform 3 to slide along the first direction relative to the first platform 2.
Optionally, the first platform 2 further includes a limiting plate 24, the limiting plate 24 is disposed on the first platform 21 and located on one side of the strip-shaped groove structure 211, and the limiting plate 24 is configured to limit the connecting portion 322 from moving in a direction perpendicular to the first direction.
As shown in fig. 2, 6, 7, 8 and 9, in this embodiment, in order to improve the stability of the sliding of the second platform 3 along the first direction and prevent the second platform from swaying left and right or pitching up and down, a position limiting plate 24 may be provided at a position corresponding to the strip-shaped groove structure 211 inside the side plate of the first platform 21.
Illustratively, taking the connecting seat 32 on the left side of the second platform 3 as an example, the limiting plate 24 may be a plate material with an L-shaped cross section, the L-shaped plate is fixed on the inner wall of the side plate of the first platform 21 by bolts and forms a channel structure with an L-shaped cross section with the strip-shaped groove structure 211, accordingly, the connecting part 322 of the connecting seat 32 is configured to have a U-shaped structure, the right part of the U-shaped structure is accommodated in the L-shaped channel structure, the left part of the U-shaped structure is located outside the side plate of the first platform 21 and is connected with the bottom of the side plate of the second platform 31, and by accommodating the right part of the U-shaped structure in the L-shaped channel structure, the connecting seat 32 can be limited from shaking in the direction perpendicular to the first direction.
It should be noted that, when the position-limiting plate 24 is disposed on the inner wall of the side plate of the first platform 21, the second slide rail 23 may be disposed on the side plate of the first platform 21 at a position below the position-limiting plate 24, or the second slide rail 23 may be disposed on an end surface of the position-limiting plate 24 facing the seat 321, and may be disposed specifically as needed, which is not limited herein.
Optionally, the multiplying mechanism further comprises a second driving structure 5, and the second driving structure 5 is disposed on the first table body 21 and is in driving connection with the connecting seat 32.
As shown in fig. 7 and 9, in the present embodiment, the second driving structure 5 has a similar structure to the first driving structure 4, except that, since the second platform 3 itself has a certain length, in order to prevent the second platform 3 from separating from the first platform 2, the maximum driving distance of the second driving structure 5 should be the difference between the lengths of the first platform 2 and the second platform 3, so that the effective driving distance can be utilized to the maximum extent, the motor and transmission members of the second driving structure 5, etc. may be disposed at the installation space at the front side of the bottom of the first platform 2, and in addition, in order not to interfere with the first driving structure 4, the second driving structure 5 should be disposed at the installation space at both sides of the bottom of the first platform 2, and the second driving structure 5 may be provided with a plurality of sets as needed.
Another embodiment of the present invention provides a vascular access device including a multiplication mechanism as above.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications are intended to fall within the scope of the invention.

Claims (10)

1. A multiplying mechanism for pushing a sheath catheter (100) and/or an inner catheter (200), wherein the inner catheter (200) is at least partially arranged in the sheath catheter (100) along a first direction, the multiplying mechanism is characterized by comprising a fixed base (1), a first platform (2) and a second platform (3), the first platform (2) is arranged on the fixed base (1) and is in sliding connection with the fixed base (1) along the first direction, the second platform (3) is arranged on the first platform (2) and is in sliding connection with the first platform (2) along the first direction, the first platform (2) is used for fixing the sheath catheter (100), and the second platform (3) is used for fixing the inner catheter (200).
2. Multiplication mechanism according to claim 1, wherein the fixed base (1) comprises a base body (11) and a first sliding groove (12), the first sliding groove (12) is disposed on a side end face of the base body (11) facing the first platform (2), the first platform (2) comprises a first platform body (21) and a first sliding rail (22), the first sliding rail (22) is disposed on a side end face of the first platform body (21) facing the fixed base (1), and the first sliding rail (22) is matched with the first sliding groove (12).
3. Multiplication mechanism according to claim 2, further comprising a first drive structure (4), the first drive structure (4) being arranged between the fixed base (1) and the first platform (2) and being configured to drive the first stage body (21) to move in the first direction.
4. The multiplication mechanism according to claim 3, wherein the first drive structure (4) comprises a first lead screw (41) and a first lead screw seat, the first lead screw (41) is disposed on a side end surface of the base body (11) facing the first table body (21), the first lead screw seat is disposed on a side end surface of the first table body (21) facing the base body (11), and the first lead screw (41) is in threaded connection with the first lead screw seat.
5. Multiplication mechanism according to claim 2, wherein the second platform (3) comprises a second platform body (31) and a connection seat (32), the connection seat (32) being provided on the second platform body (31) and being intended for sliding connection with the first platform body (21).
6. The multiplication mechanism according to claim 5, wherein the first platform (2) further comprises a second slide rail (23), the second slide rail (23) is disposed on an end surface of the first platform body (21) away from the second platform (3), a part of the connection seat (32) is connected with the second platform body (31), and another part of the connection seat (32) is used for being slidably connected with the second slide rail (23).
7. The multiplication mechanism according to claim 6, wherein the first table body (21) comprises a strip-shaped groove structure (211), the strip-shaped groove structure (211) is disposed along the first direction, the connection seat (32) comprises a seat body (321), a connection portion (322) and a second sliding groove (323), the connection portion (322) is disposed on the seat body (321) and is used for passing through the strip-shaped groove structure (211) to connect with the second table body (31), and the second sliding groove (323) is disposed on the seat body (321) and is slidably connected with the second sliding rail (23).
8. The multiplication mechanism according to claim 7, wherein the first platform (2) further comprises a limiting plate (24), the limiting plate (24) is disposed on the first platform (21) and located at one side of the strip-shaped groove structure (211), and the limiting plate (24) is used for limiting the connection part (322) from moving along a direction perpendicular to the first direction.
9. Multiplication mechanism according to any one of claims 5 to 8, further comprising a second drive structure (5), the second drive structure (5) being arranged on the first table body (21) and being in driving connection with the connection seat (32).
10. A vascular access device comprising a multiplication mechanism according to any one of claims 1 to 9.
CN202210938378.0A 2022-08-05 2022-08-05 Multiplication mechanism and vascular intervention equipment Active CN115475008B (en)

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