Intravascular ultrasound pullback device and system

Abstract

The application relates to an intravascular ultrasound withdrawal device and system. The intravascular ultrasound withdrawal device is used for realizing the withdrawal of a catheter in a blood vessel and comprises a base, a power source assembly and a transmission assembly. The power source assembly and the transmission assembly are assembled on the base, and the power source assembly is used for providing power for the transmission assembly. The transmission assembly comprises a first transmission part, a second transmission part and a clutch mechanism. The first transmission part is connected with the power source assembly, the clutch mechanism is connected between the first transmission part and the second transmission part, and the second transmission part is used for driving the catheter to perform a withdrawal movement. The clutch mechanism comprises a first sleeve, a second sleeve and an operating part. The joint surface of the first sleeve and the second sleeve comprises an inclined surface. The operating part is used for controlling the relative rotation of the first sleeve and the second sleeve, so that the first sleeve and the second sleeve are aligned or staggered, thereby enabling the transmission connection or transmission disconnection of the first transmission part and the second transmission part. Smooth switching between manual and automatic can be realized.

Description

[0001] The present application is a division of the parent application (invention name: intravascular ultrasound pullback device and system, application date: September 27, 2021, application number: 202111136817.8). TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, in particular to an intravascular ultrasound pullback device and system. BACKGROUND

[0003] The intravascular ultrasound pullback device can play the role of catheter push-pull movement, thereby meeting the necessary requirements of the intravascular ultrasound pullback device for axial imaging of blood vessels. In clinical applications, the intravascular ultrasound pullback device needs to meet the switching between the manual mode and the automatic mode.

[0004] Currently, the manual and automatic switching of the intravascular ultrasound pullback device on the market is realized by an electromagnetic clutch or a mechanical clutch and an unlocking mechanism.

[0005] The mechanical clutch includes a toothed engagement or a bevel gear engagement. The unlocking mechanism has a multi-link mechanism, which directly separates the mechanical clutch by using a yoke and rotates and separates the rotor of the mechanical clutch by using a swing rod.

[0006] The multi-link mechanism requires high production and manufacturing, and is prone to jamming during assembly, which is difficult to debug and has low efficiency.

[0007] The swing rod driving mechanical clutch rotor rotation separation method has a simple structure, fewer parts, and simple assembly, but the single-sided guidance is prone to cause the clutch to disengage and the engagement movement to be unstable, or the entire intravascular ultrasound pullback device to move and transmit stably, and the resistance is large, which is not good for user experience.

[0008] Although the electromagnetic clutch is convenient to assemble, it needs circuit control, increases the design cost of the circuit, and is prone to heat, thereby affecting the use of the product. SUMMARY

[0009] To solve the technical problem of the intravascular ultrasound pullback device in the related art in the motion transmission stability between automatic switching and manual switching, the present application provides an intravascular ultrasound pullback device and system.

[0010] In a first aspect, the present application provides an intravascular ultrasound pullback device for realizing the pullback of a catheter in a blood vessel, comprising a base, a power source assembly, and a transmission assembly, the power source assembly and the transmission assembly being assembled on the base, the power source assembly being configured to provide power for the transmission assembly;

[0011] The transmission assembly comprises a first transmission part, a second transmission part and a clutch mechanism; the first transmission part is connected with the power source assembly; the clutch mechanism is connected between the first transmission part and the second transmission part; and the second transmission part is used to drive the conduit to retract;

[0012] The clutch mechanism comprises a first sleeve, a second sleeve and an operating part; the first sleeve is connected with the first transmission part; and the second sleeve is connected with the second transmission part; the first sleeve and the second sleeve are coaxially arranged; and the interface between the first sleeve and the second sleeve comprises an inclined surface;

[0013] The operating part is used to control the relative rotation of the first sleeve and the second sleeve, so as to align or stagger the first sleeve and the second sleeve, thereby enabling the transmission connection or disconnection of the first transmission part and the second transmission part.

[0014] Optionally, the power source assembly comprises a motor; the first transmission part comprises a motor gear, a clutch gear, a first transmission member, a clutch upper shaft, a clutch intermediate shaft and a first spring;

[0015] The motor drives the motor gear to rotate; the clutch gear is engaged with the motor gear; the clutch gear is rigidly connected with the clutch upper shaft; the first spring is sleeved on the outer circumferential side of the clutch upper shaft; the clutch upper shaft is circumferentially limited with the clutch intermediate shaft; the clutch intermediate shaft is in transmission connection with the first transmission member; and the first transmission member is in transmission connection with the second transmission part.

[0016] Optionally, the second transmission part comprises a second transmission member, a clutch lower shaft, a retraction lower gear and a rack;

[0017] The second transmission member is in transmission connection with the first transmission part; the second transmission member is connected with the clutch lower shaft; the retraction lower gear is arranged on the clutch lower shaft; and the retraction lower gear is engaged with the rack.

[0018] Optionally, the first transmission part and the second transmission part are connected through gear transmission; or the first transmission part and the second transmission part are connected through friction wheel transmission.

[0019] Optionally, the operating part comprises a connecting rod, a guide shaft and a second spring; the second spring is sleeved on the guide shaft; the guide shaft is arranged on the connecting rod; and the guide shaft extends along the movement direction of the connecting rod;

[0020] One end of the connecting rod is rotatably fixed; and the other end of the connecting rod is connected with the first sleeve, so as to control the relative approach or separation of the first sleeve and the second sleeve.

[0021] Optionally, the operation component further comprises a button arranged on the connecting rod for pressing to control movement of the connecting rod.

[0022] Optionally, the intravascular ultrasound pullback device further comprises a displacement sensor arranged on the base, the displacement sensor being configured to detect displacement of the first sleeve relative to the second sleeve in the vertical direction.

[0023] Optionally, the inclined surface comprises a helical inclined surface, an angle of lead of the helical inclined surface being greater than or equal to 20° and less than or equal to 40°.

[0024] Optionally, the angle of lead of the helical inclined surface is greater than or equal to 30° and less than or equal to 35°.

[0025] Optionally, the intravascular ultrasound pullback device further comprises a sensor assembly for detecting a motion state and / or a working state of the intravascular ultrasound pullback device.

[0026] Optionally, the sensor assembly comprises an encoding detection assembly, the encoding detection assembly comprising a code disc arranged on the second transmission part and a reading head arranged on the base, the encoding detection assembly being configured to feedback a pullback speed and distance of the intravascular ultrasound pullback device.

[0027] Optionally, the sensor assembly comprises a motion detection assembly, the motion detection assembly being mounted on the base; the motion detection assembly comprising a motion detection member arranged on a motion path of the operation component for detecting a motion state of the operation component.

[0028] Optionally, the sensor assembly comprises a clutch detection assembly, the clutch detection assembly being configured to detect relative approaching or moving away of the first sleeve and the second sleeve; the clutch detection assembly being arranged on the base or the clutch detection assembly being arranged on the second sleeve.

[0029] In a second aspect, the embodiments of the present application further provide an intravascular ultrasound pullback system, the intravascular ultrasound pullback system comprising a base and the above-mentioned intravascular ultrasound pullback device, the intravascular ultrasound pullback device being mounted on the base.

[0030] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following advantages:

[0031] The intravascular ultrasound device provided by the embodiment of the present application is used for realizing the retraction of the catheter in the blood vessel, and comprises a base, a power source assembly and a transmission assembly. The transmission assembly comprises a first transmission part, a second transmission part and a clutch mechanism. The clutch mechanism comprises a first sleeve, a second sleeve and an operating part. The operating part is used for controlling the relative rotation of the first sleeve and the second sleeve, so as to align or stagger the first sleeve and the second sleeve, thereby realizing the transmission connection or transmission disconnection of the first transmission part and the second transmission part. By controlling the relative rotation of the first sleeve and the second sleeve through the operating part, the first sleeve and the second sleeve are made to approach or move away from each other, thereby realizing the power transmission of the power source assembly to the first transmission part, and the power transmission of the first transmission part to the second transmission part. Alternatively, the movement of the second transmission part is realized through manual control, and then the intravascular ultrasound device is smoothly switched between manual and automatic, thereby meeting the diversified use requirements of the user. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0034] Figure 1 The structural schematic diagram of the intravascular ultrasound device provided by the embodiment of the present application is shown in the figure.

[0035] Figure 2 The partial exploded view of the intravascular ultrasound device provided by the embodiment of the present application is shown in the figure.

[0036] Figure 3 The structural schematic diagram of the alignment of the first sleeve and the second sleeve provided by the embodiment of the present application is shown in the figure.

[0037] Figure 4 The structural schematic diagram of the staggering of the first sleeve and the second sleeve provided by the embodiment of the present application is shown in the figure.

[0038] Figure 5 The structural schematic diagram of the first sleeve and the second sleeve provided by the embodiment of the present application is shown in the figure.

[0039] Figure 6 The sectional view of the intravascular ultrasound device provided by the embodiment of the present application is shown in the figure.

[0040] Figure 7 The structural schematic diagram of the pressing state of the connecting rod provided by the embodiment of the present application is shown in the figure.

[0041] Figure 8 A structure schematic diagram of a connecting rod original state provided by the embodiment of the application;

[0042] Figure 9 and Figure 10 A force decomposition schematic diagram of an intravascular ultrasound withdrawal device provided by the embodiment of the application.

[0043] Reference signs:

[0044] 1, an intravascular ultrasound withdrawal device; 100, a power source assembly; 200, a transmission assembly; 400, a rack; 600, a base;

[0045] 110, a motor;

[0046] 210, a first transmission part; 211, a first transmission member; 212, a clutch upper shaft; 213, a clutch intermediate shaft; 214, a first spring; 215, a bearing limiting ring; 216, a first pin; 217, a first bearing; 218, a clutch gear; 219, a motor gear;

[0047] 220, a second transmission part; 221, a second transmission member; 222, a clutch lower shaft; 223, a withdrawal lower gear;

[0048] 230, a clutch mechanism; 231, a first sleeve; 232, a second sleeve; 233, an operating part; 2331, a connecting rod; 2332, a guide shaft; 2333, a second spring; 2334, a flat washer; 2335, a button;

[0049] 310, a code disc; 320, a reading head; 510, a motion detection member. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described below in a clear and complete manner with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0051] Reference Figures 1 to 10 The embodiment of the application provides an intravascular ultrasound withdrawal device 1 for realizing withdrawal of a catheter in a blood vessel, which comprises a base 600, a power source assembly 100 and a transmission assembly 200. The power source assembly 100 and the transmission assembly 200 are assembled on the base 600, and the power source assembly 100 is configured to provide power for the transmission assembly 200.

[0052] ReferenceFigure 3 and Figure 4 The transmission assembly 200 comprises a first transmission part 210, a second transmission part 220 and a clutch mechanism 230; the first transmission part 210 is connected with the power source assembly 100, the clutch mechanism 230 is connected between the first transmission part 210 and the second transmission part 220, and the second transmission part 220 is used to drive the catheter to move back.

[0053] The clutch mechanism 230 comprises a first sleeve 231, a second sleeve 232 and an operating part 233; the first sleeve 231 is connected with the first transmission part 210, and the second sleeve 232 is connected with the second transmission part 220; the first sleeve 231 and the second sleeve 232 are coaxially arranged, and the interface between the first sleeve 231 and the second sleeve 232 comprises an inclined surface; the operating part 233 is used to control the relative rotation of the first sleeve 231 and the second sleeve 232, so as to align or stagger the first sleeve 231 and the second sleeve 232, thereby enabling the transmission connection or transmission disconnection of the first transmission part 210 and the second transmission part 220.

[0054] The application further provides an intravascular ultrasound retraction system, which comprises a base and the intravascular ultrasound retraction device 1. The intravascular ultrasound retraction device 1 is installed on the base. The intravascular ultrasound retraction device 1 is connected with the base (not shown in the figure) of the intravascular ultrasound retraction system through the second transmission part 220.

[0055] By using the intravascular ultrasound retraction device 1 provided by the application, the relative approach of the first sleeve 231 and the second sleeve 232 is controlled by the operating part 233, so that the first sleeve 231 and the second sleeve 232 are aligned, thereby enabling the transmission connection of the first transmission part 210 and the second transmission part 220. Then, the power is transmitted to the first transmission part 210 by the power source assembly 100, the first transmission part 210 transmits the power to the second transmission part 220, so that the intravascular ultrasound retraction device 1 can move relative to the base of the intravascular ultrasound retraction system, thereby realizing the retraction of the catheter in the blood vessel driven by the intravascular ultrasound retraction device 1.

[0056] The so-called transmission connection means that the power provided by the power source assembly 100 can be transmitted to the second transmission part 220 via the first transmission part 210, and the so-called transmission disconnection means that the power provided by the power source assembly 100 cannot be transmitted to the second transmission part 220 via the first transmission part 210, that is, the connection relationship between the first transmission part 210 and the second transmission part 220 is disconnected.

[0057] Continuing to refer to Figure 3 and Figure 4, by operating the component 233 to control the first sleeve 231 and the second sleeve 232 to move away from each other, so that the first sleeve 231 and the second sleeve 232 are staggered, so that the first transmission part 210 and the second transmission part 220 are disconnected, thereby realizing the movement of the intravascular ultrasound withdrawal device 1 relative to the base by manual control to drive the catheter to withdraw in the blood vessel.

[0058] In summary, by using the transmission connection or transmission disconnection between the first transmission part 210 and the second transmission part 220, the intravascular ultrasound withdrawal device 1 is smoothly switched between manual operation and automatic control, thereby more accurately controlling the movement of the intravascular ultrasound withdrawal device 1 and meeting the diversified use requirements in clinical application.

[0059] Reference Figure 5 , the first sleeve 231 is circumferentially limited by the outer circumferential surface of the second sleeve 232, and the interface of the first sleeve 231 and the second sleeve 232 is a bevel, which includes a helical bevel. The first sleeve 231 has a helical bevel, and the second sleeve 232 also has a helical bevel, and the two helical bevels are symmetrically distributed and cooperate with each other. So that the first sleeve 231 moves around the helical bevel of the second sleeve 232 during rotation, and ensures that the movement of the first sleeve 231 is smooth and smooth.

[0060] When the helical bevels of the first sleeve 231 and the second sleeve 232 are aligned, the movement of the power source assembly 100 is transmitted smoothly, and at this time it is in the automatic withdrawal mode. When the helical bevels of the first sleeve 231 and the second sleeve 232 are staggered, the movement of the power source assembly 100 is interrupted, and at this time it is in the manual withdrawal mode.

[0061] On the one hand, the first sleeve 231 and the second sleeve 232 are driven to rotate and separate by the operating component 233, the helical bevels of the first sleeve 231 and the second sleeve 232 are symmetrically double-guided, the number of parts is reduced, and the whole intravascular ultrasound withdrawal device 1 is simple in structure; on the other hand, the helical bevels realize the switching between automatic withdrawal and manual withdrawal, improve the smoothness of the movement between manual withdrawal and automatic withdrawal, and improve the user's experience,

[0062] Among them, the number of bevels of the first sleeve 231 and the second sleeve 232 can be 2 or 3, and the number can be set as required without limitation, as long as the number of bevels of the first sleeve 231 and the second sleeve 232 corresponds.

[0063] Further, the helical slope has a lead angle greater than or equal to 20° and less than or equal to 40°. The lead angle, also known as the thread angle, is the angle between the circumferential line of the thread and the helical line. The helical slope has a lead angle greater than or equal to 20°, so that the user can switch between manual and automatic retraction with less force, and the relative movement of the first sleeve 231 and the second sleeve 232 is more stable and smooth.

[0064] In a specific embodiment, the helical slope has a lead angle greater than or equal to 30° and less than or equal to 35°. The helical slope has a lead angle greater than or equal to 30°, so that the user can switch between manual and automatic retraction with less force, and the relative movement of the first sleeve 231 and the second sleeve 232 is more stable and smooth. The helical slope has a lead angle less than or equal to 35°, so that the first sleeve 231 and the second sleeve 232 do not slip during the manual and automatic retraction switching.

[0065] Reference Figure 6 The power source assembly 100 includes a motor 110. The first transmission part 210 includes a gear set, a first transmission member 211, a clutch upper shaft 212, a clutch intermediate shaft 213, and a first spring 214. The gear set includes a motor gear 219 and a clutch gear 218 that mesh with each other. The motor gear 219 and the clutch gear 218 mesh to form a gear set transmission. The motor 110 includes a reduction motor. The reduction motor transmits rotary motion to the motor gear 219, and the motor gear 219 transmits rotary motion to the clutch gear 218. The clutch gear 218 is rigidly connected to the clutch upper shaft 212, and the clutch upper shaft 212 is circumferentially limited by the clutch intermediate shaft 213, so as to facilitate the transmission of motion.

[0066] Specifically, the clutch upper shaft 212 is provided with a flat position, the clutch intermediate shaft 213 is provided with a groove, and the flat position of the clutch upper shaft 212 matches the groove of the clutch intermediate shaft 213, so as to achieve the circumferential limitation of the clutch upper shaft 212 and the clutch intermediate shaft 213, and further transmit rotary motion from the clutch upper shaft 212 to the clutch intermediate shaft 213.

[0067] The first spring 214 is sleeved on the outer circumferential side of the clutch upper shaft 212, and the clutch gear 218 can make the first sleeve 231 rotate downward along the interface with the second sleeve 232 under the restoring force of the first spring 214, so as to continue the transmission of motion. The first spring 214 plays a resetting role, and the force transmission between the first sleeve 231 and the second sleeve 232 is relatively stable.

[0068] The clutch intermediate shaft 213 is in transmission connection with the first transmission member 211, and the clutch intermediate shaft 213 is fixedly connected with the first transmission member 211 through a set screw. The first transmission member 211 is in transmission connection with the second transmission part 220, so as to achieve the transmission of motion.

[0069] The first transmission part 210 further comprises a bearing limiting ring 215, a first pin 216, a first bearing 217 and a second bearing. The first bearing 217 and the second bearing are assembled on the first sleeve 231, and the bearing limiting ring 215 is used for limiting and fixing the first bearing 217; the clutch intermediate shaft 213 is configured to rotate relative to the first sleeve 231. In this way, the first transmission part 210 is avoided from being over-constrained when being relatively far away from the second transmission part 220. The first pin 216 is in interference fit with the first sleeve 231, and can provide movement support for the first transmission part 210.

[0070] The second transmission part 220 comprises a second transmission member 221, a clutch lower shaft 222 and a gear and rack assembly. The gear and rack assembly comprises a retracting lower gear 223 and a rack. The second transmission member 221 is in transmission connection with the first transmission member 211, and the first transmission member 211 and the second transmission member 221 can be connected through gear transmission. Of course, the first transmission member 211 and the second transmission member 221 can also be connected through friction wheel transmission.

[0071] The transmission connection between the first transmission member 211 and the second transmission member 221 can be in the form of gear meshing or friction wheel, both of which can realize the transmission of movement. Of course, the transmission mode between the first transmission member 211 and the second transmission member 221 is not limited to the above two modes, and other modes for realizing the transmission of movement between the first transmission member 211 and the second transmission member 221 can also be applied to the embodiments of the present application.

[0072] The second transmission member 221 is connected with the clutch lower shaft 222, and is fixed on the clutch lower shaft 222 through a set screw. The retracting lower gear 223 is arranged on the clutch lower shaft 222, and the other end of the clutch lower shaft 222 has a square flat position, and the clutch lower shaft 222 and the retracting lower gear 223 are fixedly connected through a screw and the square flat position. Thus, the transmission of the entire rotary motion is realized.

[0073] The retracting lower gear 223 is in meshing connection with the rack, and the retracting lower gear 223 is in transmission connection with the rack arranged on the base, so as to realize the conversion of rotary motion into linear motion, and meet the requirement of the intravascular ultrasound system for automatic retracting motion.

[0074] The operation member 233 is used for controlling the relative rotation of the first sleeve 231 and the second sleeve 232, so as to align or stagger the first sleeve 231 and the second sleeve 232. The first sleeve 231 can rotate relative to the second sleeve 232, and the second sleeve 232 is fixed; the second sleeve 232 can rotate relative to the first sleeve 231, and the first sleeve 231 is fixed; or both the first sleeve 231 and the second sleeve 232 can rotate.

[0075] Specifically, the second sleeve 232 is fixed on the base 600, and the first sleeve 231 can be rotated and separated relative to the first sleeve 231 and moved along the vertical direction under the action of the operating member 233, wherein when the first transmission member 211 and the second transmission member 221 are connected through gear transmission, the depth of engagement of the two gears (i.e. the distance of engagement of the two gears along the vertical direction) can be obtained by measurement before the intravascular ultrasound withdrawal device 1 is assembled. A displacement sensor (not shown in the figure) is arranged on the base 600, and the displacement of the first sleeve 231 relative to the second sleeve 232 along the vertical direction is detected by the displacement sensor. By comparing the displacement of the first sleeve 231 obtained with the depth of engagement of the two gears, it can be known whether the two gears are in a fully engaged state, an incompletely engaged state or a disengaged state.

[0076] For example, if it is detected that the displacement of the first sleeve 231 is zero, it indicates that the two gears are in a fully engaged state. If the displacement is about half the depth, it indicates that it is in an incompletely engaged state. At this time, manual withdrawal or automatic withdrawal operation should not be performed, and the withdrawal operation should be stopped and the problem should be promptly investigated. After the problem is solved, the withdrawal operation can be performed again.

[0077] The displacement sensor is any one of a potentiometer type displacement sensor, a photoelectric type displacement sensor or a laser displacement sensor. For example, the laser displacement sensor is arranged on the base 600 and located above the first sleeve 231. The laser displacement sensor is internally composed of a processor unit, a echo processing unit, a laser emitter, a laser receiver and the like. The laser displacement sensor emits one million laser pulses per second to the first sleeve 231 through the laser emitter and returns to the receiver. The processor calculates the time required for the laser pulse to encounter the first sleeve 231 and return to the receiver, thereby calculating the distance value, so as to calculate the displacement.

[0078] Reference Figure 1 and Figure 2 The operating member 233 includes a connecting rod 2331, a guide shaft 2332 and a second spring 2333. The second spring 2333 is sleeved on the guide shaft 2332, and the guide shaft 2332 is arranged on the connecting rod 2331 and extends along the movement direction of the connecting rod 2331. One end of the connecting rod 2331 is rotatably fixed, and the other end of the connecting rod 2331 is connected with the first sleeve 231 for controlling the relative approach or separation of the first sleeve 231 and the second sleeve 232.

[0079] The operation component 233 further comprises a button 2335 arranged on the connecting rod 2331 for pressing the control of the movement of the connecting rod 2331. The button 2335 comprises a silica gel button protruding from the connecting rod 2331, so that the user can press the silica gel button conveniently, provide the comfort of user pressing, and further make the user experience better, and also facilitate the control of the movement of the connecting rod 2331.

[0080] The intravascular ultrasound retrieval device 1 further comprises a rack 400, and the base 600 is mounted on the rack 400. The connecting rod 2331 is assembled on the rack 400 by screws. The operation component 233 further comprises a second pin and a flat washer 2334. The connecting rod 2331 is sleeved on the second pin, and the silica gel button is sleeved on the connecting rod 2331. The guide shaft 2332 passes through the second spring 2333, the flat washer 2334 and the connecting rod 2331 in sequence, and is fixedly assembled on the base 600 by two screws, for guiding and assisting the reset of the swinging movement of the connecting rod 2331.

[0081] Reference Figure 7 When the user presses the connecting rod 2331, the connecting rod 2331 swings around the fixed fulcrum. In the process of swinging, the connecting rod 2331 compresses the second spring 2333, so that the first sleeve 231 rotates around the second sleeve 232.

[0082] In the process of rotating, the second sleeve 232 rises on the helical slope of the first sleeve 231, and after the second sleeve 232 rises by a distance, the first transmission member 211 and the second transmission member 221 are disengaged, so that the power transmission of the power source assembly 100 is interrupted. At this time, the intravascular ultrasound retrieval device 1 can be manually operated to make the intravascular ultrasound retrieval device 1 perform the withdrawal movement.

[0083] Reference Figure 8 When the user releases the connecting rod 2331, the connecting rod 2331 is reset under the compression force of the second spring 2333, and drives the first sleeve 231 to reset and rotate. In this way, in the process of rotating, the second sleeve 232 descends along the helical slope of the first sleeve 231. The first transmission member 211 and the second transmission member 221 are in contact, and the power transmission of the power source assembly 100 continues. At this time, the movement of the intravascular ultrasound retrieval device 1 can be controlled by the power source assembly 100.

[0084] The connecting rod 2331 moves in the first direction, the first sleeve 231 rotates in the first direction, and the first sleeve 231 reciprocates up and down in a direction perpendicular to the first direction. The first direction is the direction of the pressing force F1.

[0085] Reference Figure 9 And Figure 10When the pressing force F1 is released, the resistance F2 of the second spring 2333 forces the connecting rod 2331 to return to its original position, and the connecting rod 2331 provides a part of the circumferential force to rotate the first sleeve 231 during the returning process. At the same time, the first sleeve 231 moves downward under the action of the elastic force F6, and the helical surface of the second sleeve 232 is in contact with the helical surface of the first sleeve 231, so that the first transmission member 211 and the second transmission member 221 are in contact, and the power of the power source assembly 100 continues to be transmitted to the second transmission member 221. The manual retraction movement is converted into automatic retraction movement.

[0086] When the pressing force F1 is released, the resistance F2 of the second spring 2333 forces the connecting rod 2331 to return to its original position, and the connecting rod 2331 provides a part of the circumferential force to rotate the first sleeve 231 during the returning process. At the same time, the first sleeve 231 moves downward under the action of the elastic force F6, and the helical surface of the second sleeve 232 is in contact with the helical surface of the first sleeve 231, so that the first transmission member 211 and the second transmission member 221 are in contact, and the power of the power source assembly 100 continues to be transmitted to the second transmission member 221. The manual retraction movement is converted into automatic retraction movement.

[0087] In this way, the swinging movement of the connecting rod 2331 is realized, so that the short operation stroke is converted into the long working stroke. The layout space of the intravascular ultrasound retraction device 1 is effectively utilized, and the size of the intravascular ultrasound retraction device 1 is reduced. Under the action of the swinging movement of the connecting rod 2331, the helical surface of the first sleeve 231 is guided by the helical surface of the second sleeve 232 to perform helical lifting movement around the central axis of the second sleeve 232.

[0088] In a specific embodiment, the intravascular ultrasound retraction device 1 further comprises a sensor assembly for detecting the movement state of the intravascular ultrasound retraction device 1. In this way, the relative rotation of the first sleeve 231 and the second sleeve 232 is controlled by the operating part 233, so that the first sleeve 231 and the second sleeve 232 are close to or away from each other, thereby realizing the power transmission of the power source assembly 100 to the first transmission part 210, and the first transmission part 210 transmits the power to the second transmission part 220. Alternatively, the movement of the second transmission part 220 is realized by manual control, and then the intravascular ultrasound retraction device 1 is smoothly switched between manual and automatic, meeting the diversified use needs of users. And the sensor assembly can timely feedback the movement state and / or working state of the intravascular ultrasound retraction device 1, so that the process of automatic control or manual control is more accurate, and the situation of speed jump and motion transmission mutation is avoided.

[0089] The sensor assembly can timely feedback the motion state or working state of the intravascular ultrasound withdrawal device 1, so that the automatic control or manual control process is more accurate, and the jump of speed and the mutation of motion transmission are avoided. Of course, the sensor assembly can also timely feedback the motion state and working state of the intravascular ultrasound withdrawal device 1, so as to realize more accurate operation.

[0090] The motion state of the intravascular ultrasound withdrawal device 1 refers to the withdrawal speed and distance of the intravascular ultrasound withdrawal device 1, and the working state of the intravascular ultrasound withdrawal device 1 refers to whether the intravascular ultrasound withdrawal device 1 is in an automatic working state or a manual working state. Specifically, the sensor assembly can detect the withdrawal speed of the intravascular ultrasound withdrawal device 1, ensure that the withdrawal speed of the intravascular ultrasound withdrawal device 1 is uniform and stable during the withdrawal process, and avoid the occurrence of speed jump. At the same time, the sensor assembly can also control the stroke of the withdrawal, so as to avoid the situation that the intravascular ultrasound withdrawal device 1 collides with the structural member during the withdrawal process. The sensor assembly can also detect whether the actual motion parameters of the intravascular ultrasound withdrawal device 1 meet the control requirements, so as to ensure the stability of the withdrawal process. The sensor assembly can also detect the motion state of the operating part 233, so as to monitor the switching of the automatic control state or the manual control state of the intravascular ultrasound withdrawal device 1, and determine whether the intravascular ultrasound withdrawal device 1 is in an automatic working state or a manual working state. The sensor assembly can also detect whether the first sleeve 231 and the second sleeve 232 are in a staggered state or an aligned state, so as to feedback whether the intravascular ultrasound withdrawal device 1 is in an automatic working state or a manual working state. Specifically, when it is detected that the first sleeve 231 and the second sleeve 232 are in a staggered state, it indicates that the intravascular ultrasound withdrawal device 1 is in a manual control working state at this time, and vice versa, when it is detected that the first sleeve 231 and the second sleeve 232 are in an aligned state, it indicates that the intravascular ultrasound withdrawal device 1 is in an automatic control working state at this time.

[0091] In summary, by using the transmission connection or transmission disconnection between the first transmission part 210 and the second transmission part 220, the intravascular ultrasound withdrawal device 1 can be smoothly switched between manual operation and automatic control, so as to more accurately control the motion of the intravascular ultrasound withdrawal device 1, and meet the diversified use requirements in clinical application. And by setting the sensor assembly, the motion state of the intravascular ultrasound withdrawal device 1 can be quickly feedback, and the accuracy of motion control can be improved.

[0092] Reference Figure 7 and Figure 8The sensor assembly comprises a motion detection assembly 500 mounted on the base 600 for detecting the motion state of the connecting rod 2331. The motion detection assembly 500 comprises a motion detection piece 510 arranged on the motion path of the operating member 233. The motion detection piece 510 is arranged on the motion path of the connecting rod 2331. The motion detection piece 510 comprises a lever. The connecting rod 2331 can make reciprocating swing motion, and the motion detection piece 510 is arranged on the motion path of the connecting rod 2331. When the connecting rod 2331 swings, the motion detection piece 510 can be triggered by the connecting rod 2331, so as to make the motion detection assembly 500 feedback a circuit control signal.

[0093] The motion detection assembly 500 detects the motion state of the connecting rod 2331, and judges whether the first sleeve 231 and the second sleeve 232 in the clutch mechanism 230 are misaligned or aligned through the motion state of the connecting rod 2331, and then timely feedbacks a circuit control signal and issues a circuit control command.

[0094] Under normal circumstances, the connecting rod 2331 is not subjected to pressing force, the first sleeve 231 and the second sleeve 232 are attached and aligned, the motion detection assembly 500 is pressed by the connecting rod 2331, so as to trigger a circuit control signal and feedback a circuit control signal to a control system. When the connecting rod 2331 is pressed, the first sleeve 231 and the second sleeve 232 are misaligned, the motion detection assembly 500 is reset, a switch circuit signal is disconnected, and the control system judges the state of the first sleeve 231 and the second sleeve 232, i.e. whether in misaligned state or aligned state, according to the circuit signal, and determines the working state of the intravascular ultrasound withdrawal device 1.

[0095] The motion detection assembly 500 further comprises a micro switch. The micro switch comprises three pins, i.e. a pin A, a pin B and a pin C. The pin C is a common terminal, the pin A and the pin C form a circuit loop when not triggered, and the pin B and the pin C form a circuit loop when triggered.

[0096] The sensor assembly further comprises a clutch detection assembly (not shown in the figure), which is configured to detect the relative approach or distance of the first sleeve 231 and the second sleeve 232. The clutch detection assembly is arranged on the base 600. Of course, the clutch detection assembly can also be arranged on the second sleeve 232. The clutch detection assembly comprises a micro switch, and the detection principle is consistent with that of the motion detection assembly 500. The clutch detection piece of the clutch detection assembly is arranged on the motion path of the first sleeve 231, and the micro switch can be automatically controlled and safety protected, so as to improve the control precision of the clutch detection assembly.

[0097] The retraction movement of the intravascular ultrasound retraction device 1 in the automatic operation mode is not allowed to be disconnected between the first transmission part 210 and the second transmission part 220. Once the disconnection occurs, the automatic operation mode must be controlled to stop immediately. Similarly, the retraction movement of the intravascular ultrasound retraction device 1 in the manual operation mode is not allowed to be in the state of automatically triggered by power. Therefore, in order to ensure the safety and effectiveness of the intravascular ultrasound retraction device 1 during the switching process between automatic and manual operation, a clutch detection assembly is set to detect the transmission state between the first transmission part 210 and the second transmission part 220. Once the clutch detection assembly detects the state change of the first transmission part 210 and the second transmission part 220, it can timely feedback the circuit signal to the control system, and the control system issues the corresponding control command.

[0098] Reference Figure 6 The sensor assembly further comprises a code detection assembly 300, the clutch lower shaft 222 is fixedly assembled on the base 600 through two bearings, and the code detection assembly 300 is arranged on the second transmission part 220 to monitor and feedback the parameters of the retraction movement. The code detection assembly 300 is arranged on the clutch lower shaft 222.

[0099] The code detection assembly 300 comprises a code disc 310 and a reading head 320, and the code detection assembly 300 is configured to feedback the retraction speed and distance of the intravascular ultrasound retraction device 1 in real time. The code detection assembly 300 arranged on the clutch lower shaft 222 monitors the retraction speed of the intravascular ultrasound retraction device 1, ensures that the retraction speed is uniform and stable during the retraction process, and avoids the occurrence of speed jump.

[0100] In a specific embodiment, the code detection assembly 300 can also be arranged in the second transmission part 220 to detect whether the actual movement parameters of the intravascular ultrasound retraction device 1 meet the control requirements.

[0101] The intravascular ultrasound retraction device 1 further comprises an electronic limit switch arranged on the base 600 to control the stroke of the retraction and avoid the situation that the retraction process collides with other structural components.

[0102] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0103] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, which modifications and changes are to be understood as intended to be encompassed by the general scope of the application. Accordingly, the application is not to be limited to the above described or illustrated embodiments, but is intended to encompass all embodiments consistent with the principles of the application.

Claims

1. An intravascular ultrasound retraction device, characterized in that, include: A base, a power source assembly, and a transmission assembly, wherein the power source assembly and the transmission assembly are mounted on the base, and the power source assembly is used to provide power to the transmission assembly; The transmission assembly includes a first transmission part, a second transmission part, and a clutch mechanism; the first transmission part is connected to the power source assembly, the clutch mechanism is connected between the first transmission part and the second transmission part, and the second transmission part is used to drive the guide tube to perform a retracting movement; The clutch mechanism includes a first sleeve, a second sleeve, and an operating component. The first sleeve is connected to the first transmission part, and the second sleeve is connected to the second transmission part. The first sleeve and the second sleeve are coaxially arranged, and the contact surface of the first sleeve and the second sleeve includes an inclined surface. The operating component is used to control the relative rotation of the first sleeve and the second sleeve so that the first sleeve and the second sleeve are aligned or staggered, thereby connecting or disconnecting the transmission of the first transmission part and the second transmission part. The power source assembly includes a motor; The first transmission unit includes a motor gear, a clutch gear, a first transmission component, a clutch upper shaft, a clutch intermediate shaft, and a first spring; The motor drives the motor gear to rotate, the clutch gear meshes with the motor gear, the clutch gear is rigidly connected to the upper clutch shaft, the first spring is sleeved on the outer circumference of the upper clutch shaft, the upper clutch shaft is circumferentially limited by the clutch intermediate shaft, the clutch intermediate shaft is driven by the first transmission component, the first transmission component is driven by the second transmission part, the upper clutch shaft is provided with a flat part, the clutch intermediate shaft is provided with a groove, and the flat part of the upper clutch shaft matches the groove of the clutch intermediate shaft; The second transmission unit includes a second transmission component, a lower clutch shaft, a lower retraction gear, and a rack; The second transmission component is connected to the first transmission part. The second transmission component is fixed on the lower clutch shaft by a set screw. The other end of the lower clutch shaft has a square flat part. The lower clutch shaft is fixedly connected to the lower retraction gear by screws and the square flat part. The lower retraction gear meshes with the rack.

2. The intravascular ultrasound retraction device according to claim 1, characterized in that, The first transmission unit further includes a bearing retaining ring, a first pin, a first bearing, and a second bearing. The first bearing and the second bearing are assembled on the first sleeve. The bearing retaining ring is used to limit and fix the first bearing. The first pin is interference-fitted with the first sleeve to provide motion support for the first transmission unit.

3. The intravascular ultrasound retraction device according to claim 1, characterized in that, The operating component includes a connecting rod, a guide shaft, and a second spring. The second spring is sleeved on the guide shaft, and the guide shaft is disposed on the connecting rod, extending along the movement direction of the connecting rod. One end of the connecting rod is rotatably fixed, and the other end of the connecting rod is connected to the first sleeve to control the relative approach or distance between the first sleeve and the second sleeve. The operating component also includes a button, which is disposed on the connecting rod for pressing to control the movement of the connecting rod; the button includes a silicone button that protrudes from the connecting rod.

4. The intravascular ultrasound retraction device according to claim 3, characterized in that, The operating component also includes a second pin and a flat washer, the connecting rod is sleeved on the second pin, the silicone button is sleeved on the connecting rod, and the guide shaft passes through the second spring, the flat washer and the connecting rod in sequence.

5. The intravascular ultrasound retraction device according to claim 1, characterized in that, The intravascular ultrasound retraction device also includes a displacement sensor, which is disposed on the base and configured to detect the vertical displacement of the first sleeve relative to the second sleeve. The displacement sensor is any one of a potentiometer-type displacement sensor, a photoelectric displacement sensor, or a laser displacement sensor.

6. The intravascular ultrasound retraction device according to claim 5, characterized in that, The laser displacement sensor is mounted on the base and is located above the first sleeve.

7. The intravascular ultrasound retraction device according to claim 3, characterized in that, It also includes a frame, the base is mounted on the frame, and the connecting rod is assembled to the frame by screws.

8. The intravascular ultrasound retraction device according to claim 1, characterized in that, The intravascular ultrasound retraction device further includes a sensor assembly for detecting the motion state and / or operating state of the intravascular ultrasound retraction device; the sensor assembly includes a motion detection assembly; the motion detection assembly includes a motion detection element disposed on the motion path of the operating component for detecting the motion state of the operating component; the motion detection assembly further includes a micro switch.

9. The intravascular ultrasound retraction device according to claim 8, characterized in that, The sensor assembly includes an encoding detection assembly, which includes a code disk and a reader. The code disk is disposed on the second transmission part, and the reader is disposed on the base. The encoding detection assembly is used to provide feedback on the retraction speed and distance of the intravascular ultrasound retraction device. The encoding detection assembly is disposed on the clutch lower shaft.

10. The intravascular ultrasound retraction device according to claim 8, characterized in that, The sensor assembly includes a clutch detection assembly configured to detect whether the first sleeve and the second sleeve are relatively close or far apart; the clutch detection assembly is disposed on the base, or the clutch detection assembly is disposed on the second sleeve; the clutch detection assembly includes a micro switch.

11. The intravascular ultrasound retraction device according to claim 1, characterized in that, It also includes an electronic limit switch, which is mounted on the base to control the retraction stroke.

12. An intravascular ultrasound withdrawal system, characterized in that, The intravascular ultrasound retraction system includes a base and an intravascular ultrasound retraction device as described in any one of claims 1 to 11, wherein the intravascular ultrasound retraction device is mounted on the base.

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