CN115005937A

CN115005937A - Rotary grinding system and driving handle thereof

Info

Publication number: CN115005937A
Application number: CN202210924912.2A
Authority: CN
Inventors: 谢磊; 孔令娟; 黄飞虎; 赵承; 刘梦钦; 郭澜涛
Original assignee: Shanghai Hongmai Medical Technology Co ltd
Current assignee: Shanghai Hongmai Medical Technology Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-09-06

Abstract

The invention relates to a rotary grinding system and a driving handle thereof, wherein the driving handle comprises a handle shell, a driving assembly and a telescopic pipe assembly, the driving assembly comprises a support frame and a motor, the support frame can move towards the near end and the far end of the handle shell relative to the handle shell, the motor is connected with the support frame, the telescopic pipe assembly comprises a first guide pipe, a second guide pipe and a transmission pipe, the first guide pipe and the second guide pipe are telescopically nested and connected to form a liquid guide channel, part of the structure of the transmission pipe is positioned in the liquid guide channel, the transmission pipe can rotate under the driving of the motor, the far end of the first guide pipe is relatively fixed with the handle shell, the near end of the second guide pipe is relatively fixed with the support frame, and when the support frame moves relative to the handle shell, the transmission pipe and the second guide pipe both move along the axial direction of the first guide pipe. The rotary grinding system and the driving handle thereof can utilize the liquid guide channel to inject liquid into a relatively moving structural member for cooling in the rotary motion process of the transmission pipe so as to avoid transmission failure.

Description

Rotary grinding system and driving handle thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a rotary grinding system and a driving handle thereof.

Background

Atherosclerosis is mostly seen in lower limb arteries, is characterized by forming fibrolipid plaques in intima and media of arteries and calcified lesions to cause thickening of vessel walls and stenosis of vessel lumens, is mainly distributed in the intima and media of femoropopliteal arteries and below knee arteries, and causes diseases such as limb ischemia, gangrene and the like due to the lesion arterial stenosis and even complete occlusion, and often causes claudication and even amputation if the treatment is not performed in time. Atherosclerotic plaques may exhibit different characteristics depending on the texture of the plaque and calcification, and currently in medical practice, atherectomy devices are often used to pre-treat heavily calcified lesions. The principle of processing by adopting the atherectomy device is that a grinding head of a rotary grinding system is used for high-speed rotary grinding at a vascular lesion, calcified or fibrous lipid plaques are removed, an occluded blood vessel is opened, a smoother blood vessel lumen gain is obtained, and subsequent medicine saccules and stents can be conveniently placed. In interventional therapy of stenoses at intimal openings and bifurcations and stenoses with angles, eccentricities, long sections and spots, orbital atherectomy has become a more clinically applied means for removing atherosclerotic plaques.

In the related technology, the rotary grinding system mainly comprises a control host, a driving handle, a driving shaft and a grinding head positioned at the far end of the driving shaft, wherein the host controls a driving assembly to drive the driving shaft to rotate at a high speed, the grinding head at the far end of the driving shaft is pushed forward to contact and grind to remove lesion, and plaque or calcified lesion is ablated into fine and tiny particles (smaller than the diameter of red blood cells).

However, when the driving handle is electrically driven to drive the driving shaft to rotate, high temperature is easily generated between the relatively moving structural parts, so that transmission failure is caused, and the service life is short.

Disclosure of Invention

Therefore, the rotary grinding system and the driving handle thereof are provided to solve the problem that high temperature is easy to generate during rotary grinding to cause transmission failure.

In one aspect, the present invention provides a drive handle comprising:

a handle housing having opposite proximal and distal ends;

the driving assembly comprises a supporting frame and a motor, the supporting frame is connected with the handle shell and can move towards the near end and the far end of the handle shell relative to the handle shell, and the motor is connected with the supporting frame;

the telescopic pipe assembly comprises a first guide pipe, a second guide pipe and a transmission pipe, wherein the first guide pipe and the second guide pipe are telescopically nested and connected to form a liquid guide channel, part of the transmission pipe is located in the liquid guide channel, the transmission pipe can be driven by a motor to rotate, the far end of the first guide pipe is relatively fixed with the handle shell, the near end of the second guide pipe is relatively fixed with the support frame, and when the support frame moves relative to the handle shell, the transmission pipe and the second guide pipe move along the axial direction of the first guide pipe.

According to the driving handle, part of the structure of the transmission pipe is located in the liquid guide channel, and fluid media such as physiological saline or lubricating liquid can be introduced into the liquid guide channel, so that a good cooling or lubricating effect can be exerted between the transmission pipe and the telescopic pipe assembly, friction between relatively moving structural parts is effectively reduced, the temperature of the relatively moving structural parts is reduced, and transmission failure is avoided.

In another aspect, the present invention provides a rotational atherectomy system comprising the drive handle described above.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that drawings of other embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a rotational atherectomy system in accordance with one embodiment;

FIG. 2 is a cross-sectional view of a drive shaft and a sleeve of an embodiment of a rotational atherectomy system;

FIG. 3 is an exploded view of a drive handle of an embodiment of the rotational atherectomy system;

FIG. 4 is a schematic view of the mounting structure of the drive handle shown in FIG. 3;

FIG. 5 is a partially enlarged view of the structure of part A in FIG. 1;

FIG. 6 is a partially enlarged view of the structure of part B in FIG. 1;

FIG. 7 is an enlarged partial view of the structure of section C of FIG. 1;

FIG. 8 is a cross-sectional view of a knob in a drive handle of an embodiment of the rotational atherectomy system;

FIG. 9 is a perspective view of a drive handle of an embodiment of a rotational atherectomy system showing a motor and drive gear;

fig. 10 is a schematic view of a connection structure of a driving pipe and a driven gear in a driving handle of the rotational grinding system according to an embodiment.

Reference numerals:

100. a rotational milling system; 10. a drive handle; 11. a handle housing; 11a, a first shell; 11b, a second housing; 11c, a track; 11d, a strip-shaped groove; 12. a drive assembly; 121. a support frame; 121a, a liquid storage cavity; 121b, mounting holes; 121c, perforation; 121d, a slot; 122. a motor; 122a, an output shaft of the motor; 122b, a switch; 123. a gear set; 123a, a driving gear; 123b, a driven gear; 123c, a through hole; 123d, a through hole; 124. a bearing; 125. a bearing seat; 13. a telescoping tube assembly; 13a, a liquid guide channel; 131. a drive tube; 131a, splines; 132. a first conduit; 133. a second conduit; 133a, a liquid passing hole; 134. a third conduit; 14. a liquid injection joint; 15. a locking member; 20. a guide wire; 30. a drive shaft; 30a, a grinding head; 40. a sleeve; 50. a knob assembly; 51. a connecting member; 51a, a mounting part; 51b, an annular groove; 52. a knob; 52a, a buckle; 52b, a boss; 52c, a mounting cavity; 53. and (6) pressing a key.

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 following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for illustrative purposes only and do not denote a single embodiment.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

It should be noted that the terms "proximal" and "distal" are used as terms of orientation, which are commonly used in the field of interventional medical devices, wherein "proximal" refers to the end of the device that is closer to the operator and "distal" refers to the end of the device that is farther from the operator. Taking the example of the drive shaft moving along the guide wire, the drive shaft moving along the guide wire means the drive shaft moving axially along the guide wire.

In an embodiment of the invention, the axial direction refers to a direction parallel to a line connecting the center of the distal end and the center of the proximal end of the medical device; radial refers to a direction perpendicular to the axial direction; the circumferential direction is a direction around the axial direction.

Referring to fig. 1 and 2, the present invention provides a rotational atherectomy system 100 comprising a drive handle 10, a guidewire 20, and a drive shaft 30 distally provided with a grater 30 a. The distal end portions of the abrasive tip 30a may be provided with particles (e.g., diamond particles) for increasing friction, and the abrasive tip 30a may also be formed of particles coated on the outer wall of the distal end of the drive shaft 30. Thus, when the grinding head 30a is used for grinding the arteriosclerosis plaque in the diseased blood vessel, the particles at the distal part of the grinding head can also play a good grinding effect.

The proximal ends of the guidewire 20 and drive shaft 30 are both connected to the drive handle 10. The guidewire 20 serves as a structural member for establishing a pathway within the body for guiding the drive shaft 30 into the vessel at a location where rotational atherectomy is desired. Specifically, the driving shaft 30 is sleeved on the guide wire 20, and the driving shaft 30 can rotate around the guide wire 20 by operating the driving handle 10, and the driving shaft 30 moves along the guide wire 20, so that the driving shaft 30 is rotatably ground under the guidance of the guide wire 20. It should be noted that the driving shaft 30 is a flexible pipe, and the lumen of the driving shaft 30 can be passed by the guide wire 20, so as to facilitate the driving shaft 30 to push the grinding head 30a to the position to be ground along the guide wire 20.

Referring to fig. 1 and 3, the drive handle 10 includes a handle housing 11, a drive assembly 12, and a telescoping tube assembly 13. The handle housing 11 is intended to be held by an operator for rotational manipulation. Both the drive assembly 12 and the extension tube assembly 13 are mounted within the handle housing 11.

In some embodiments, the handle housing 11 includes a first housing 11a and a second housing 11b, the first housing 11a and the second housing 11b can be connected by a snap connection, or can be connected by a connecting member 51 such as a screw or a bolt, and the assembly of the driving assembly 12 and the telescopic tube assembly 13 in the driving handle 10 into the handle housing 11 can be facilitated by combining the first housing 11a and the second housing 11 b.

For convenience of explanation, an end of the handle housing 11 facing forward of the operator during the holding use is referred to as a "distal end of the handle housing 11", and correspondingly, an end of the handle housing 11 facing rearward of the operator is referred to as a "proximal end of the handle housing 11".

The driving assembly 12 includes a supporting frame 121 and a motor 122, the supporting frame 121 is connected to the handle housing 11, and the motor 122 is connected to the supporting frame 121. In some embodiments, as shown in fig. 3 and 4, a track 11c for supporting the driving assembly 12 is provided in the handle housing 11, and in particular, the supporting frame 121 is slidably connected with the handle housing 11 through the track 11c, so that the driving assembly 12 can be integrally moved between the proximal end and the distal end of the handle housing 11 relative to the handle housing 11. The rail 11c may be a slide rail, or a slide groove provided in the inner wall of the handle case 11.

As shown in fig. 4 and 5, the telescopic tube assembly 13 includes a driving tube 131, a first guide tube 132 and a second guide tube 133, the driving tube 131 can be rotated by the motor 122, and the driving tube 131 is used for transmitting a torque to the driving shaft 30. Specifically, the proximal end of the driving shaft 30 is connected to the distal end of the transmission tube 131, so that when the transmission tube 131 is rotationally moved by the motor 122, the driving shaft 30 will be rotationally moved by the transmission tube 131, thereby allowing the grinding head 30a to grind the grinding position.

The first conduit 132 and the second conduit 133 are telescopically nested to form the drainage channel 13 a. Part of the structure of the transmission tube 131 is located in the liquid guiding channel 13a, and the liquid guiding channel 13a can be filled with fluid media such as physiological saline or lubricating liquid, so that the physiological saline or the lubricating liquid can exert a good cooling or lubricating effect between the tube members of the telescopic tube assembly 13 (for example, between the transmission tube 131 and the first guide tube 132, or between the first guide tube 132 and the second guide tube 133), friction between the relatively moving structural members is effectively reduced, the temperature of the relatively moving structural members is reduced, and transmission failure of the transmission tube 131 to the driving shaft 30 is avoided.

In some embodiments, as shown in fig. 5, the second conduit 133 is sleeved outside the first conduit 132, specifically, the outer wall of the first conduit 132 is in clearance fit with the inner wall of the second conduit 133, and when the first conduit 132 and the second conduit 133 relatively move telescopically, the liquid guide channel 13a enables the lubricating liquid to enter the clearance between the two, so that when the first conduit 132 and the second conduit 133 relatively move telescopically, the lubricating liquid can exert a good lubricating effect. It should be noted that in other embodiments, the first guide tube 132 is sleeved outside the second guide tube 133, and specifically, the inner wall of the first guide tube 132 is in clearance fit with the outer wall of the second guide tube 133. When the first guide pipe 132 and the second guide pipe 133 relatively move telescopically, the liquid guide channel 13a enables lubricating liquid to enter a gap between the first guide pipe 132 and the second guide pipe 133, so that the lubricating liquid can exert a good lubricating effect when the first guide pipe 132 and the second guide pipe 133 relatively move telescopically.

As shown in fig. 5 and 6, the distal end of the first guide tube 132 is fixed to the handle housing 11, and the proximal end of the second guide tube 133 is fixed to the support frame 121. The support bracket 121 is movable relative to the handle housing 11 toward the proximal and distal ends of the handle housing 11. When the supporting frame 121 moves relative to the handle housing 11, the transmission tube 131 and the second guide tube 133 move along the axial direction of the first guide tube 132 under the driving of the supporting frame 121. Since the proximal end of the driving shaft 30 is connected to the distal end of the transmission tube 131, when the supporting frame 121 moves relative to the handle housing 11, the driving shaft 30 can move towards the distal end and the proximal end relative to the handle housing 11, and then when the rotational grinding system 100 is used for rotationally grinding the vascular lesion, the grinding head 30a on the driving shaft 30 can repeatedly move at the vascular lesion, and finally the plaque or calcified lesion is ablated into fine particles.

It should be noted that, because the first guide tube 132 and the second guide tube 133 forming the liquid guiding channel 13a can perform relative telescopic movement, then, the telescopic tube assembly 13 does not obstruct the axial movement of the driving assembly 12 along the first guide tube 132, so as to ensure that the driving assembly 12 can perform axial movement together with the driving tube 131, and moreover, the telescopic tube assembly 13 can perform a good supporting effect on the driving tube 131 during the telescopic movement, so as to improve the stability of the driving tube 131 driving the driving shaft 30 to perform rotational movement.

As shown in fig. 6, the handle housing 11 is connected to an injection connector 14, the first conduit 132 is provided with a side hole, the injection connector 14 is connected to the side hole, and the injection connector 14 is used for introducing a fluid medium such as physiological saline or a lubricant. It should be noted that the end of the priming connector 14 remote from the first conduit 132 is adapted to be connected to an external priming device, so that the priming device can inject the fluid medium into the first conduit 132 through the priming connector 14.

Taking the fluid medium as physiological saline or lubricating fluid as an example, when the physiological saline or lubricating fluid is injected into the injection joint 14, a part of the physiological saline or lubricating fluid can enter the fluid guide channel 13a through the first conduit 132, and another part of the physiological saline or lubricating fluid flows toward the grinding head 30a along the drive shaft 30. This allows the cooling of the structures such as the first and

second ducts

132 and 133 and the transmission tube 131 inside the handle housing 11, and at the same time, the cooling of the structures such as the drive shaft 30 and the grinding head 30a located outside the handle housing 11. Further, as shown in fig. 2, a sleeve 40 is sleeved on the outside of the driving shaft 30, and the sleeve 40 may be made of teflon. It should be noted that, the proximal end of the cannula 40 is connected to the handle housing 11, and the cannula 40 is sleeved outside the driving shaft 30, so that the driving shaft 30 can be prevented from damaging the blood vessel wall during the rotational abrasion process. In addition, the wrapping of the drive shaft 30 by the sleeve 40 during the rotational grinding process also facilitates the flow of the fluid medium along the drive shaft 30 toward the rotational grinding position to cool the drive shaft 30 and the grinding stones 30 a.

As shown in fig. 7, the supporting frame 121 is formed with a liquid storage cavity 121a, and the liquid guide channel 13a is communicated with the liquid storage cavity 121a, so that the liquid (such as the aforementioned physiological saline or lubricating liquid) injected into the liquid guide channel 13a can enter the liquid storage cavity 121 a. In this embodiment, at least a part of the structure of the motor 122 is accommodated in the liquid storage cavity 121a, and then the liquid in the liquid storage cavity 121a can be used to cool the motor 122, so that the operating temperature of the motor 122 is not too high and is not damaged, and the service life of the driving assembly 12 is prolonged.

Specifically, as shown in fig. 7, a liquid passing hole 133a is formed in a wall of the second conduit 133, and the liquid passing hole 133a connects the liquid guiding channel 13a with the liquid storage cavity 121 a.

Further, the liquid passing holes 133a are plural, so that the efficiency of filling the liquid storage chamber 121a with liquid is improved by the plural liquid passing holes 133 a. The aperture of the liquid passing hole 133a is smaller than or equal to 1mm, so that the phenomenon that a large amount of bubbles are generated in the liquid injection process due to the fact that the liquid passing hole 133a is too large is avoided, and meanwhile, the smaller the aperture of the liquid passing hole 133a is, the lower the influence on the strength of the second conduit 133 is, therefore, the aperture of the liquid passing hole 133a is set to be smaller than or equal to 1mm, and the overall structural strength of the second conduit 133 is favorably maintained.

It should be noted that the proximal end of the second guiding tube 133 is inserted into the supporting frame 121, and the second guiding tube 133 is stably connected to the supporting frame 121. In some embodiments, as shown in fig. 7, the supporting frame 121 is provided with a through hole 121c and a slot 121d, the through hole 121c is communicated with the liquid storage cavity 121a, and the proximal end of the second guiding tube 133 is inserted into the liquid storage cavity 121a through the through hole 121c and then is inserted into the slot 121 d.

Referring again to fig. 1, 3 and 5, in some embodiments, the telescopic tube assembly 13 includes a third guide tube 134, a proximal end of the third guide tube 134 is fixed relative to the handle housing 11, and a distal end of the third guide tube 134 is disposed through the transmission tube 131, so that during the axial movement of the transmission tube 131 along the first guide tube 132, the third guide tube 134 can cooperate with the first guide tube 132 to better support and guide the transmission tube 131, and reduce the possibility of arching of the transmission tube 131 during the axial movement relative to the first guide tube 132, so as to further improve the movement stability of the transmission tube 131.

Further, the distal end of the third guide tube 134 is located in the first guide tube 132, so that a partial structure of the transmission tube 131 is located between the inner wall of the first guide tube 132 and the outer wall of the third guide tube 134, and thus, in the axial movement process of the transmission tube 131 along the first guide tube 132, the support and guide of the first guide tube 132 and the third guide tube 134 can be always obtained, and the motion stability of the transmission tube 131 is effectively improved, so as to facilitate improving the rotational grinding effect.

In some embodiments, the inner wall of at least one of the first conduit 132, the second conduit 133, the drive tube 131, and the third conduit 134 is provided with a lubricious coating. The friction during relative motion between the pipe fitting can be reduced to the setting of lubricated coating, promotes the motion reliability between the pipe fitting. The material of the lubricating coating may be PTFE (polytetrafluoroethylene) or PA (Polyamide).

In some embodiments, the outer wall of at least one of the first conduit 132, the second conduit 133, the driving pipe 131, and the third conduit 134 is coated with a polymer pipe. The friction when relative motion between the pipe fitting can be reduced in the setting of polymer pipe, promotes the motion reliability between the pipe fitting. The material of the polymer tube may be PI (polyimide), PTFE (polytetrafluoroethylene), or PO (Polyolefin).

Referring to fig. 1, 3 and 7, in some embodiments, the driving handle 10 includes a knob assembly 50 connected to the handle housing 11, the knob assembly 50 is connected to the supporting frame 121, the knob assembly 50 has a locking state and an unlocking state with respect to the handle housing 11, when the knob assembly 50 is in the locking state, the knob assembly 50 is fixed with respect to the handle housing 11 to lock the relative position of the supporting frame 121 and the handle housing 11, at this time, the supporting frame 121 cannot move with respect to the handle housing 11, and thus the transmission tube 131 is axially limited to the handle housing 11, so that the grinding head 30a at the distal end of the driving shaft 30 stays at the rotational grinding position and is continuously rotationally ground to remove the lesion at a fixed point.

It will be appreciated that when the knob assembly 50 is in the unlocked state, the knob assembly 50 can be moved relative to the handle housing 11 toward the proximal and distal ends of the handle housing 11 to readjust the honing position of the grater 30 a.

In some embodiments, as shown in fig. 1 and 3, the knob assembly 50 includes a connecting member 51 and a knob 52, the connecting member 51 is slidably connected to the handle housing 11, the handle housing 11 is provided with a strip-shaped groove 11d extending along a length direction thereof, the connecting member 51 has a mounting portion 51a, the mounting portion 51a penetrates through the strip-shaped groove 11d, and the knob 52 is rotatably connected to the mounting portion 51 a. As shown in fig. 7 and 8, the mounting portion 51a is provided with an annular groove 51b on the circumferential side, and the knob 52 is provided with a catch 52a, the catch 52a being engaged with the annular groove 51b so that the knob 52 can rotate relative to the mounting portion 51 a. It should be noted that the knob 52 can also be rotatably connected to the mounting portion 51a by other means, for example, the mounting portion 51a is provided with an external thread, and the knob 52 is provided with an internal thread matching with the external thread, so that the knob 52 is threadedly connected with the mounting portion 51a, and thus the knob assembly 50 can be in the locked state and the unlocked state by rotating the knob 52.

In the embodiment where the knob assembly 50 includes the link 51 and the knob 52, the state of the knob assembly 50 is switched by rotating the knob 52. Specifically, when the knob assembly 50 is in the locked state, the knob 52 provides a locking force such that the link 51 is fixed relative to the handle housing 11, and when the knob assembly 50 is in the unlocked state, the knob 52 releases the locking of the link 51.

The bottom of the knob 52 is provided with a boss 52b, the boss 52b is configured to be able to rotate with the knob 52 to abut against the handle housing 11 to block the connecting member 51 from sliding relative to the handle housing 11, and when the boss 52b is opposed to the strip-shaped groove 11d, the locking of the connecting member 51 is released.

Further, the knob 52 is provided with a mounting cavity 52c, a button 53 is arranged in the mounting cavity 52c, a switch 122b for controlling the motor 122 is arranged at a position of the supporting frame 121 opposite to the button 53, and the button 53 is used for pressing and releasing the switch 122 b.

As shown in fig. 7, the driving assembly 12 includes a gear set 123, and the gear set 123 is used for transmitting the torque output by the motor 122 to the transmission pipe 131. Specifically, the gear shaft may be mounted on the support frame 121.

Further, the gear set 123 includes a driving gear 123a and a driven gear 123b that are engaged with each other, the driving gear 123a is connected with the output shaft 122a of the motor 122, the driven gear 123b is connected with the transmission pipe 131, and a transmission ratio between the driving gear 123a and the driven gear 123b is smaller than 1, so as to increase a rotation speed of the transmission pipe 131, and to improve a rotational efficiency of the driving shaft 30 to a rotational position under the driving of the transmission pipe 131.

Referring to fig. 7 and 9, the output shaft 122a of the motor 122 is a D-shaped shaft, the driving gear 123a is provided with a through hole 123c matched with the D-shaped shaft, the driving gear 123a is radially provided with a through hole 123D communicated with the through hole 123c, and after the driving gear 123a is matched with the output shaft 122a of the motor 122, the driving gear 123a can be locked by a jackscrew penetrating through the through hole 123D, so that the reliability that the output shaft 122a of the motor 122 drives the driving gear 123a to rotate is effectively ensured, and circumferential idling or slip failure is avoided.

It should be noted that the output shaft 122a of the motor 122 may not be a D-shaped shaft, for example, the cross section of the output shaft 122a of the motor 122 is triangular, rectangular or hexagonal, and accordingly, the shape of the through hole 123c on the driving gear 123a matches with the output shaft 122a of the motor 122, and with this arrangement, circumferential idle rotation or slip failure can also be avoided when the output shaft 122a of the motor 122 drives the driving gear 123a to rotate. The connection between the driving gear 123a and the output shaft 122a of the motor 122 is not limited herein.

As shown in fig. 3, 7 and 10, both ends of the driven gear 123b are rotatably connected to the supporting frame 121 through bearings 124, so that the bearings 124 reduce the frictional resistance during the rotation of the driven gear 123 b. Specifically, a mounting hole 121b is formed in the outer side of the supporting frame 121, a bearing 124 on one side of the driven gear 123b is mounted in the mounting hole 121b, a bearing 124 on the other side is mounted in a bearing seat 125, and the bearing seat 125 is connected to the supporting frame 121.

The driven gear 123b may be coupled to an outer wall of the transmission pipe 131 by injection molding. In this embodiment, the outer wall of the transmission pipe 131 may be provided with splines 131a, and the driven gear 123b is injection molded on the outer wall, so that the driven gear 123b is matched with the splines 131a, thereby improving the reliability of torque transmission from the driven gear 123b to the transmission pipe.

Referring again to fig. 1 and 3, in some embodiments, the actuating handle 10 includes a locking member 15, the locking member 15 being disposed at the proximal end of the handle housing 11. In this embodiment, the locking member 15 is used to lock the guide wire 20, so that the guide wire 20 will not move axially and rotate axially with the driving shaft 30 during the rotational grinding process, so that the guide wire 20 can stably guide the driving shaft 30 for rotational grinding, thereby improving the rotational grinding stability. The structure of the locking member 15 is not limited thereto, so long as the locking member 15 can fix the guide wire 20 relative to the handle housing 11 as needed.

It should be noted that, in the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An actuating handle, comprising:

a handle housing having opposite proximal and distal ends;

2. The drive handle of claim 1, wherein the support frame defines a fluid reservoir, at least a portion of the motor is received in the fluid reservoir, and the fluid conducting channel is in communication with the fluid reservoir.

3. The driving handle according to claim 2, wherein a liquid passing hole is formed in a tube wall of the second conduit, and the liquid passing hole communicates the liquid guiding channel with the liquid storage cavity.

4. The driving handle according to claim 3, wherein the liquid passing hole is plural, and the hole diameter of the liquid passing hole is less than or equal to 1 mm.

5. The drive handle of claim 1, wherein the outer wall of the first conduit is a clearance fit with the inner wall of the second conduit, or wherein the inner wall of the first conduit is a clearance fit with the outer wall of the second conduit.

6. The drive handle of claim 1, wherein the extension tube assembly includes a third conduit, a proximal end of the third conduit being fixed relative to the handle housing, a distal end of the third conduit being disposed through the drive tube.

7. The actuating handle of claim 6 wherein the distal end of said third conduit is located within said first conduit.

8. The drive handle of claim 7 wherein an inner wall of at least one of the first conduit, the second conduit, the drive tube and the third conduit is provided with a lubricious coating; and/or the outer wall of at least one of the first guide pipe, the second guide pipe, the transmission pipe and the third guide pipe is coated with a polymer pipe.

9. The drive handle of claim 1, wherein the drive assembly includes a gear set for transferring torque output by the motor to the drive tube.

10. The drive handle of claim 9, wherein the gear set comprises a drive gear and a driven gear that are intermeshed, wherein a gear ratio between the drive gear and the driven gear is less than 1, wherein the drive gear is coupled to an output shaft of the motor, and wherein the driven gear is coupled to the drive tube.

11. The drive handle of claim 1, comprising a knob assembly coupled to the handle housing, the knob assembly being coupled to the support bracket, the knob assembly having a locked state and an unlocked state relative to the handle housing, the knob assembly being fixed relative to the handle housing when the knob assembly is in the locked state to lock the relative position of the support bracket and the handle housing, the knob assembly being movable relative to the handle housing toward the proximal and distal ends of the handle housing when the knob assembly is in the unlocked state.

12. The actuating handle of claim 11, wherein the knob assembly includes a connecting member and a knob, the connecting member is slidably connected to the handle housing, the handle housing is provided with a strip-shaped groove extending along a length direction thereof, the connecting member has an installation portion, the installation portion penetrates out of the strip-shaped groove, the knob is rotatably connected to the installation portion, when the knob assembly is in the locking state, the knob provides a locking force so that the connecting member is relatively fixed to the handle housing, and when the knob assembly is in the unlocking state, the knob releases the locking of the connecting member.

13. The drive handle of claim 12, wherein a bottom of the knob is provided with a boss configured to be rotatable with the knob against the handle housing to block the connector from sliding relative to the handle housing and to unlock the connector when the boss is opposite the bar-shaped groove.

14. The drive handle according to claim 12 or 13, wherein the knob is provided with a mounting cavity, a key is arranged in the mounting cavity, a switch for controlling the motor is arranged at a position of the support frame opposite to the key, and the key is used for pressing and releasing the switch.

15. A rotational atherectomy system comprising the drive handle of any of claims 1 to 14.

16. The rotational atherectomy system of claim 15, comprising a drive shaft, wherein a grinding head is disposed at a distal end of the drive shaft, a proximal end of the drive shaft is connected to a distal end of the drive tube, the handle housing is connected to a filling joint, the first conduit is provided with a side hole, the filling joint is connected to the side hole, the filling joint is used for introducing physiological saline or lubricant, a part of the physiological saline or lubricant introduced from the filling joint can enter the fluid guide channel through the first conduit, and another part of the physiological saline or lubricant can flow along the drive shaft toward the grinding head.