CN114948104B

CN114948104B - Anti-clogging medical shaver

Info

Publication number: CN114948104B
Application number: CN202210567009.5A
Authority: CN
Inventors: 郭毅军; 郭以宏
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2024-12-06
Anticipated expiration: 2042-05-24
Also published as: CN114948104A

Abstract

The invention discloses an anti-blocking medical planing device which comprises a planing tool, a planing handle, a planing tool driving device and a planing handle, wherein the planing tool comprises an outer cutter assembly and an inner cutter assembly, the inner cutter assembly is arranged in the outer cutter assembly, the planing tool comprises a chip removing component, the chip removing component is arranged in an inner cutter tube and comprises a mandrel and spiral blades which are arranged on the outer peripheral surface of the mandrel and extend along the spiral direction, and the planing handle further comprises a second output part which is used for driving the chip removing component to rotate in the forward direction to drive tissues in the inner cutter assembly to be conveyed from front to back. The anti-blocking medical planing device is characterized in that the inner cutter tube is internally provided with the chip removing part, the chip removing part and the inner cutter tube form a spiral conveying mechanism, cut tissues enter the inner cutter tube from the inner cutting window, and the cut tissues axially move along the inner cutter tube until reaching the suction hole under the pushing of the spiral blade, so that the planing tool can be effectively prevented from being blocked in an operation, and the operation efficiency is improved.

Description

Anti-blocking medical planing device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anti-blocking medical planing device.

Background

The medical planing device is applied to the surgical operation to realize the cutting treatment of soft tissues. The prior medical planing device comprises a planing tool and a planing handle, wherein the planing tool generally comprises an outer cutter tube and an inner cutter tube arranged in the outer cutter tube, the front end of the outer cutter tube is provided with an outer cutter window, the side edge of the outer cutter window is provided with a plurality of outer cutter teeth, the front end of the inner cutter tube is provided with an inner cutter window, and the side edge of the inner cutter window is provided with a plurality of inner cutter teeth. When the inner cutter tube rotates relative to the outer cutter tube, the outer cutter teeth and the inner cutter teeth move relatively to cut off tissues extending into the outer cutting window, the tissues are sucked into the inner cutting window, and the chips are sucked out through the vacuum system, so that the cutting purpose is achieved. The planing handle comprises a shell and a cutter driving device which is arranged in the shell and is used for driving the inner cutter tube to rotate.

The medical planing device with the structure is easy to occur the conditions that the planing tissue is cut continuously, the fascia tissue is wound around the cutter head, and the tissue is blocked at the joint of the cutter head and the cutter tube or at the middle and rear parts of the cutter tube when the fascia tissue with stronger toughness in an operation area or a large amount of tissue is needed to be planed in a short time. Because the cutter can not effectively cut off tissues and timely suck and remove the cut tissues, after the cutter is blocked, the planing capability of the cutter is thoroughly lost, and only the inner cutter is taken out and the blocked tissues in the cutter tube are cleaned, so that the situation not only affects the operation efficiency, but also can easily bring bacterial pollution to the operation and affects the user experience.

Disclosure of Invention

Aiming at the prior art, the technical problem to be solved by the invention is to provide an anti-blocking medical planing device, which can avoid blocking a cutter in operation and improve operation efficiency.

In order to solve the technical problems, the anti-blocking medical planing device comprises a planing tool, a planing handle, a planing tool driving device and a planing assembly, wherein the planing tool comprises an outer cutter assembly and an inner cutter assembly, the inner cutter assembly is arranged in the outer cutter assembly, the planing handle comprises a shell and a cutter driving device arranged in the shell, the cutter driving device comprises a first output part used for driving the inner cutter assembly to rotate in the forward direction and/or the reverse direction, the planing tool further comprises a chip removing assembly, the chip removing assembly comprises a chip removing part, the chip removing part is arranged in the inner cutter assembly, the chip removing part comprises a mandrel and a spiral blade which is arranged on the outer circumferential surface of the mandrel and extends in the spiral direction, and the planing handle further comprises a second output part used for driving the chip removing part to rotate in the forward direction so as to drive tissues in the inner cutter assembly to be conveyed from front to back.

The anti-blocking medical planing device is characterized in that the inner cutter assembly is internally provided with the chip removing part, the chip removing part comprises the mandrel and the helical blade, the chip removing part and the inner cutter assembly form a spiral conveying mechanism, cut tissues enter the inner cutter assembly from the inner cutting window, and the cut tissues axially move along the inner cutter assembly until reaching the suction hole under the pushing of the helical blade, so that the blocking of the planing blade can be effectively avoided in an operation, and the operation efficiency is improved.

In one embodiment, the helical blade comprises a first section of helical blade and the remaining section of helical blade, the outer diameter edge of the first section of helical blade being provided with a cutting edge which cooperates with the inner wall of the inner knife assembly to sever tissue.

In one embodiment, at least one chip breaking dividing groove is arranged on the outer diameter edge of the first section of spiral blade at intervals along the spiral direction so as to divide the cutting edge into at least two sections.

In one embodiment, the chip breaking dividing groove is V-shaped.

In one embodiment, a rear groove wall of the chip breaking dividing groove in the forward rotation direction is inclined to a rear side of the spindle in the forward rotation direction relative to an axis of the spindle so that the rear groove wall intersects with a surface of the first segment helical blade to form a cutting edge.

In one embodiment, the pitch of the first segment of helical blades is less than the pitch of the remaining segments of helical blades.

In one embodiment, the outer diameter of the first helical blade gradually increases from the front end to the rear end and then gradually decreases.

In one embodiment, the remaining section of helical blades includes a second section of helical blades positioned forward of the first section of helical blades, the trailing end of the second section of helical blades being connected to the leading end of the first section of helical blades.

In one embodiment, the second helical blade has an outer diameter that gradually increases from the leading end to the trailing end.

In one embodiment, the remaining section of helical blades includes a third section of helical blade located rearward of the first section of helical blade, the forward end of the third section of helical blade being connected to the rearward end of the first section of helical blade.

In one embodiment, the second output part rotates forward and reverse synchronously with the forward and reverse rotation of the first output part, the chip ejection assembly further includes a second interface connected with the chip ejection member, the second output part is combined with the second interface to transmit forward rotation torque to the chip ejection member when the second output part rotates in the forward direction, and the second output part is separated from the second interface to not transmit reverse torque when the second output part rotates in the reverse direction.

In one embodiment, the second output part has a cylindrical surface extending along a radial direction, the second interface includes at least two interface grooves arranged at intervals along a rotation direction of the second output part, a groove wall of the interface groove includes a working surface, a sliding surface and a transition surface, the working surface is an arc surface matched with the cylindrical surface, a rear end of the working surface of one interface groove along a forward rotation direction is connected with a front end of the sliding surface of the working surface of one interface groove along the forward rotation direction, and a front end of the working surface of one interface groove along the forward rotation direction is connected with a rear end of the sliding surface of the next interface groove along the forward rotation direction along the transition surface along the forward rotation direction.

In one embodiment, the inner cutter assembly comprises an inner cutter tube and an inner cutter handle connected with the rear end of the inner cutter tube, a first interface is arranged at the rear end of the inner cutter handle, the chip removal assembly further comprises a unidirectional rotation pushing sleeve, the unidirectional rotation pushing sleeve is rotatably arranged in the rear end of the inner cutter handle, a second interface is arranged at the rear end of the unidirectional rotation pushing sleeve, and the unidirectional rotation pushing sleeve is in transmission connection with the mandrel.

In one embodiment, the inner cutter assembly further comprises a connecting sleeve and an elastic reset component, the connecting sleeve is arranged in the unidirectional rotation pushing sleeve and is connected with the unidirectional rotation pushing sleeve, the connecting sleeve and the unidirectional rotation pushing sleeve synchronously rotate and can axially slide relative to the unidirectional rotation pushing sleeve, the front end of the connecting sleeve is in transmission connection with the rear end of the chip removing piece, and the elastic reset component is used for resetting the unidirectional rotation pushing sleeve.

In one embodiment, the unidirectional rotation pushing sleeve is provided with a sliding groove extending along the axial direction, the connecting sleeve is provided with a sliding pin extending along the radial direction, and the sliding pin is inserted into the sliding groove.

In one embodiment, the second output part comprises a pin shaft and a sliding bearing sleeved on the pin shaft, and the outer circumferential surface of the sliding bearing is the cylindrical surface.

The advantageous effects of the additional technical features of the present invention will be described in the detailed description section of the present specification.

Drawings

FIG. 1 is a perspective view of a medical planing operation device according to an embodiment of the present invention;

FIG. 2 is a front view of a planing tool of the medical planing operation device shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of the outer cutter assembly of the planing tool of FIG. 2;

FIG. 5 is an enlarged partial schematic view of the portion N in FIG. 4;

FIG. 6 is a perspective view of the inner cutter assembly of the planing tool of FIG. 2;

FIG. 7 is an enlarged partial schematic view of H in FIG. 6;

FIGS. 8 and 9 are schematic views of the mating of the outer and inner cutter heads;

FIG. 10 is a front view of the inner shank of the inner knife assembly shown in FIG. 6;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a front view of the chip ejection member of the planing tool of FIG. 2;

FIG. 13 is an enlarged partial schematic view of FIG. 10 at C;

FIG. 14 is a perspective view of the chip ejection member of the planing tool shown in FIG. 2;

FIGS. 15 and 16 are partial enlarged schematic views of FIG. 12 at D, E, respectively;

FIG. 17 is an enlarged schematic view of a portion taken along F in FIG. 3;

FIG. 18 is a partially enlarged schematic illustration of FIG. 3 at G;

FIG. 19 is a partial cross-sectional view of the medical planing operation device shown in FIG. 1;

FIG. 20 is an enlarged partial schematic view of the portion I of FIG. 19;

FIG. 21 is a cross-sectional view taken along line E-E of FIG. 19;

FIG. 22 is an enlarged schematic view taken along J in FIG. 21;

FIG. 23 is a front view of a unidirectional rotating sleeve;

FIG. 24 is a cross-sectional view taken along line C-C of FIG. 23;

fig. 25 is a perspective view of the connection sleeve;

fig. 26 is a front view of the connection sleeve;

FIG. 27 is a cross-sectional view taken along line D-D of FIG. 24;

fig. 28 is a perspective view of the tool drive arrangement (with the motor removed);

Fig. 29 is a cross-sectional view of the tool drive arrangement shown in fig. 28 (with the motor removed).

Reference numerals illustrate:

1. Planing tool; 11, an outer cutter tube; 111, an outer cutter bar; 113, outer cutter head, 112, outer cutter teeth, 112a, outer cutting window, 112b, tooth tip, 112c, tooth flank, 112d, tooth bottom, 112e, outer cutting edge, 112f, first chip breaker, 112g, third chip breaker, 112h, outer rear cutting edge, 12, outer cutter head, 13, first seal, 14, inner cutter tube, 141, inner cutter bar, 143, inner cutter head, 142, inner cutter tooth, 142a, inner cutting window, 142b, tooth tip, 142c, tooth flank, 142d, tooth bottom, 142e, inner cutting edge, 142f, second chip breaker, 142g, fourth chip breaker, 142h, inner rear cutting edge, 142i, circular arc, 15, inner cutter head, 151, suction hole, 152, inner cutter tube securing hole, 153, U-shaped notch, 16, chip breaker, 161, mandrel, 161a, positioning portion, 161b, tab, 163, first segment helical blade, 163a, 163b, 163, groove, 163b, rotor segment, 163c, inner cutting edge, 142b, 17 f, second helical groove, 17 b, second helical groove, 171, 17, 172, 17, 172, 152, 153, 17, 16, 161, the magnet respectively magnet the magnet respectively the magnet, b rotor groove the magnet respectively the 17 the magnet respectively the 17 b the 17 the outer the 17 the.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily apparent, a more particular description of the invention briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present invention and that the present invention may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Fig. 1 is a perspective view of a medical planing operation device according to an embodiment of the present invention. As shown in fig. 1, the medical planing operation device according to one embodiment of the present invention includes a planing tool 1 and a planing handle 2, wherein the planing tool 1 is used for a soft tissue cutting process, the planing handle 2 is connected to the planing tool 1, and the planing handle 2 mainly provides power for the operation of the planing tool 1 and sucks and discharges the cut tissue.

Fig. 2 is a front view of the planing tool 1 of the medical planing operation apparatus shown in fig. 1, and fig. 3 is a sectional view taken along the line A-A of fig. 2. As shown in fig. 2 and 3, the planing tool 1 as an example comprises an outer cutter assembly, an inner cutter assembly and a chip removal assembly.

Fig. 4 is a perspective view of the outer cutter assembly of the planing tool 1 shown in fig. 3, and fig. 5 is a partially enlarged schematic view of fig. 4 at N. As shown in fig. 2-4, the outer cutter assembly comprises an outer cutter tube 11 and an outer cutter handle 12, wherein the rear end of the outer cutter tube 11 is inserted into an outer cutter tube fixing hole fixed at the front end of the outer cutter handle 12, an outer cutter window 112a is arranged at the front end of the outer cutter tube 11, a plurality of outer cutter teeth 112 are arranged on two side edges of the outer cutter window 112a, and tooth tips 112b, tooth side surfaces 112c and tooth bottom surfaces 112d of the outer cutter teeth 112 intersect with the inner wall surface of the outer cutter head 113 to form an outer cutting edge 112e. The outer cutter tube 11 as an example includes an outer cutter bar 111 and an outer cutter head 113, the front end of the outer cutter bar 111 is fixedly connected (e.g. welded, bonded) with the rear end of the outer cutter head 113, the rear end of the outer cutter bar 111 is inserted and fixed in an outer cutter tube fixing hole of the outer cutter handle 12, and an outer cutter window 112a is provided on the outer cutter head 113.

The outer cutter handle 12 is a tubular structure extending along the axial direction, at least one sealing ring mounting groove is arranged on the outer peripheral surface of the outer cutter handle 12, a first sealing ring 13 (see fig. 3) is arranged in the sealing ring mounting groove, and the sealing ring 13 is used for sealing a gap between the outer cutter handle 12 and the housing 21 of the planing handle 2 so as to prevent liquid from entering the housing 21 through the gap. In order to ensure the stability and reliability of the inner cutter assembly and the chip removal assembly relative to the outer cutter assembly during operation, the front section and the rear section of the outer cutter handle 12 are respectively provided with two first sealing rings 13, so that good sealing performance and stability between the installation positions of the planing cutter 1 and the planing handle 2 can be ensured.

Fig. 6 is a perspective view of the inner cutter assembly of the planing tool 1 shown in fig. 2, and fig. 7 is a partially enlarged schematic view of fig. 6 at H. As shown in connection with fig. 2, 3, 6 and 7, the inner knife assembly is disposed within the outer knife assembly and is rotatable in forward and reverse directions relative to the outer knife assembly, with "forward" and "reverse" being relative rotational directions, i.e., the "forward" direction may be clockwise, then the "reverse" direction may be counter-clockwise, and the "forward" direction may also be counter-clockwise, then the "reverse" direction may be clockwise. The inner cutter assembly comprises an inner cutter tube 14 and an inner cutter handle 15, wherein the rear end of the inner cutter tube 14 is connected with the inner cutter handle 15, an inner cutting window 142a is arranged at the front end of the inner cutter tube 14, a plurality of inner cutter teeth 142 are arranged on two side edges of the inner cutting window 142a, and tooth tips 142b, tooth side surfaces 142c and tooth bottom surfaces 142d of the inner cutter teeth 142 are intersected with the outer wall surface of the inner cutter head 143 to form an inner cutting edge 142e. The inner cutter tube 14 as an example includes an inner cutter bar 141 and an inner cutter bit 143, the front end of the inner cutter bar 141 is fixedly connected (e.g., welded, bonded) to the rear end of the inner cutter bit 143, the rear end of the inner cutter bar 141 is connected to the inner cutter handle 15, and an inner cutting window 142a is provided on the inner cutter bit 143.

Preferably, at least one first chip breaker 112f is provided on the tooth bottom surface and/or the tooth side surface of the outer cutter tooth 112, dividing the outer cutting edge 112e into at least two segments, and/or at least one second chip breaker 142f is provided on the tooth side surface and/or the tooth side surface of the inner cutter tooth 142, dividing the inner cutting edge 142e into at least two segments. In this way, when the outer cutting edge 112e and the inner cutting edge 142e relatively rotate to cut, the outer cutting edge 112e and/or the inner cutting edge 142e are/is divided into at least two sections, so that the tissue can be cut into multiple sections along the axial direction, the tissue volume is reduced, and the tissue can be sucked into the inner cutter tube 14 conveniently, and meanwhile, the resistance of the outer cutting edge 112e and the inner cutting edge 142e relatively rotate is reduced, the tissue can be cut more easily, and the cutting efficiency is improved. Preferably, the first chip breaker 112f and the second chip breaker 142f are staggered in the axial direction, which may further increase chip breaking cutting performance. As an example, the first chip breaker 112f is provided on the tooth bottom surface of the outer cutter tooth 112 (see fig. 5), and the second chip breaker 142f is provided on the tooth side surface of the inner cutter tooth 142 (see fig. 7).

Preferably, the heights of the first chip breaker grooves 112f formed in the same outer cutter tooth 112 are different, and the heights of the second chip breaker grooves 142f formed in the same inner cutter tooth 142 are different, so that the strength of the cutter tooth can be ensured, and the chip breaking effect can be increased.

Preferably, the tooth tip, tooth flank, and tooth bottom surface of the outer cutter tooth 112 are inclined outwardly at a first camber angle, and the flute bottom surface of the first chip breaker 112f is inclined outwardly at a second camber angle (see fig. 5), which is greater than the first camber angle, such that the cutting edge formed by the intersection of the flute bottom surface of the first chip breaker 112f and the inner wall surface of the outer cutter head 113 is sharper. Alternatively, the second camber angle may be equal to the first camber angle.

Preferably, the tooth tip, tooth flank, and tooth bottom surface of the inner cutter tooth 142 are inclined inward at a first inward inclination angle, and the groove bottom surface of the second chip breaker groove 142f is inclined inward at a second inward inclination angle that is greater than the first inward inclination angle (see fig. 7), such that a cutting edge formed by the intersection of the groove bottom surface of the second chip breaker groove 142f and the outer wall surface of the inner cutter bit 143 is sharper. Alternatively, the second camber angle may also be equal to the second camber angle.

Preferably, the top surface of the rear edge of the outer cutting window 112a intersects the inner wall surface of the outer cutter head 113 to form an outer rear cutting edge 112h (see fig. 5), and the top surface of the rear edge of the inner cutting window 142a intersects the outer wall surface of the inner cutter head 143 to form an inner rear cutting edge 142h. The outer trailing cutting edge 112h cooperates with the inner trailing cutting edge 142h to sever tissue behind the cutting window (see fig. 7). Preferably, at least one third chip breaker 112g is provided on the top surface of the rear edge of the outer cutting window 112a, the at least one third chip breaker 112g divides the outer rear cutting edge 112h into at least two segments, at least one fourth chip breaker 142g is provided on the top surface of the rear edge of the inner cutting window 142a, and the at least one fourth chip breaker 142g divides the inner rear cutting edge 142h into at least two segments. In this way, when the outer rear cutting edge 112h and the inner rear cutting edge 142h relatively rotate to cut, the outer rear cutting edge 112h and/or the inner rear cutting edge 142h are/is divided into at least two sections, so that tissues can be cut into a plurality of sections along the axial direction, the volume of the tissues is reduced, and the tissues can be conveniently sucked into the inner cutter tube 14, and meanwhile, the resistance when the outer rear cutting edge 112h and the inner rear cutting edge 142h relatively rotate is reduced, the tissues are cut into more easily, and the cutting efficiency is improved.

As shown in fig. 8 and 9, when the high elastic tissue such as fascia is cut, the inner cutter tooth 142 starts cutting into and grasping the tissue, the tissue grasped when continuing to rotate is pressed between the inner cutter tooth 142 and the outer cutter tooth 112, and when the inner cutter tooth 142 rotates to approach the bottoms of the inner cutter tooth 142 and the outer cutter tooth 112, the final cutting and separation of the tissue is completed by the outer cutting bottom edge and the inner cutting bottom edge, and since the outer cutting edge 112e is divided into a plurality of segments by the first chip breaker groove 112f, the inner cutting edge 142e is divided into a plurality of segments by the second chip breaker groove 142f, the high elastic tissue such as fascia is cut more easily, and the high elastic tissue is cut more easily by the negative pressure suction edge portion in the cutter, thereby improving the planing efficiency.

Fig. 10 is a front view of the inner handle 15 of the inner cutter assembly shown in fig. 6, and fig. 11 is a cross-sectional view taken along line B-B of fig. 10. As shown in fig. 10 and 11, the inner cutter handle 15 is of an approximately cylindrical structure extending in the axial direction, and an inner cutter tube fixing hole 152 is provided in the center of the front end of the inner cutter handle 15, and the rear end of the inner cutter tube 14 is inserted and fixed in the inner cutter tube fixing hole 152. The middle part of the inner cutter handle 15 is provided with a suction hole 151 penetrating in the radial direction, and the suction hole 151 communicates with the inner cutter tube fixing hole 152. During shaving, the tissue in the inner cutter tube 14 enters the suction hole 151 and is then discharged through the suction passage 211 provided in the housing 21 of the shaving handle 2. The rear end of the inner cutter tube 14 is provided with a cylindrical interface portion, and the interface portion is provided with a first interface which is matched with a first output portion of the cutter driving device. The cutter driving device drives the inner cutter handle 15 to rotate forward and/or rotate reversely through the first output part and the first interface, namely, the cutter driving device can rotate unidirectionally and also can rotate reciprocally, and soft tissues are cut through the cooperation of the inner cutter teeth 142 and the outer cutter teeth 112. As an example, the first interface includes at least one pair (two pairs in the present embodiment) of U-shaped notches 153 provided at the rear end of the inner cutter tube 14, and two U-shaped notches 153 of each pair of U-shaped notches 153 are arranged 180 ° in the rotation direction.

As shown in fig. 3, the chip removing assembly includes a chip removing member 16 and a second interface, the chip removing member 16 is provided in the inner cutter tube 14, the chip removing member 16 includes a spindle 161 and a helical blade provided on an outer circumferential surface of the spindle 161 and extending in a helical direction, and the second interface is for transmitting a forward rotation torque in cooperation with a second output portion of the planing handle 2. The chip removing part 16 and the inner cutter tube 14 form a spiral conveying mechanism, when the chip removing assembly works, cut tissues enter the inner cutter tube 14 from the inner cutting window 142a, and the tissue is pushed by the spiral blade to axially move along the inner cutter tube 14 until reaching the suction hole 151, so that the planing tool can be effectively prevented from being blocked in the operation.

As shown in connection with fig. 2,3, 12-16, the helical blades include a first segment of helical blades 163 and the remaining segment of helical blades, the outer diameter edge of the first segment of helical blades 163 is provided with a cutting edge 163a, and the cutting edge 163a cooperates with the inner wall of the inner cutter tube 14 to sever tissue. In this way, the chip ejection member 16 cuts the tissue with the cutting edge 163a during the conveyance of the tissue, facilitating the conveyance of the tissue to the suction hole 151. By way of example, the first helical blade 163 has at least one chip-breaking dividing groove 163b spaced apart in the helical direction on the outer diameter edge thereof to divide the cutting edge 163a into at least two sections, so that the cutting edge 163a more easily cuts into tissue, which is advantageous in increasing cutting efficiency. As an example, the chip breaking dividing groove 163b is V-shaped. Preferably, a rear side groove wall 163c of the chip breaking dividing groove 163b in the forward rotation direction is inclined to the rear side with respect to the axis of the spindle 161 so that the rear side groove wall 163c intersects the surface of the first-stage helical blade 163 to form a cutting edge 163d, and tissue in the helical groove formed by the first-stage helical blade 163 can be minced. Moreover, at least one chip breaking dividing groove 163b is formed on the first section of the spiral blade 163 in a spiral shape with a certain angle along the axial line, so that a sharp cutting edge 163d is formed, and the effect of continuous cutting in the rotating process is achieved.

Preferably, the pitch of the first section of helical blades 163 is smaller than the pitch of the remaining sections of helical blades, such that tissue is compressed after entering the first section of helical blades 163, allowing more tissue to enter between the first section of helical blades 163 and the inner wall of the inner cutter tube 14, increasing cutting efficiency.

Preferably, the outer diameter of the first section of helical blade 163 is gradually increased from the front end to the rear end and then gradually decreased, so that the tissue entering between the first section of helical blade 163 and the inner wall of the inner cutter tube 14 is gradually compressed and then gradually loosened, and the chip removing member 16 is prevented from being stuck by the tissue under the condition of ensuring the cutting effect.

Referring to fig. 17, the front end of the first-stage helical blade 163 is close to the rear end of the inner cutting window 142a or protrudes beyond the rear end of the inner cutting window 142 a. Because tissue is mainly jammed near the rear end of the inner cutting window 142a, the front end of the first-stage helical blade 163 is brought close to the rear end of the inner cutting window 142a or protrudes beyond the rear end of the inner cutting window 142a, and the tissue near the rear end of the inner cutting window 142a can be cut.

Preferably, as seen in fig. 13, the remaining section of the helical blade includes a second section of the helical blade 164 located in front of the first section of the helical blade 163, and the rear end of the second section of the helical blade 164 is connected to the front end of the first section of the helical blade 163. The second-stage helical blade 164 mainly guides the tissue cut by the cutter head backward to the first-stage helical blade 163. Preferably, the outer diameter of the second section of helical blades 164 increases from the leading end to the trailing end, allowing tissue sliding back along the second section of helical blades 164 to pool at this section.

Preferably, the remaining spiral blades include a third spiral blade 165 located behind the first spiral blade 163, a front end of the third spiral blade 165 is connected to a rear end of the first spiral blade 163, and a rear end of the third spiral blade 165 extends to the suction hole 151. The cut tissue is delivered to the suction hole 151 by the third helical blade 165.

As shown in fig. 17, the front end of the inner cutter 143 has a circular arc portion 142i, a positioning hole is formed in an inner wall of the circular arc portion 142i, a positioning portion 161a that mates with the positioning hole is formed in the front end of the mandrel 161, and the positioning portion 161a is inserted into the positioning hole (see fig. 17) to axially and radially position the front end of the chip removing member 16. Preferably, the thickness of the circular arc portion 142i is greater than the thickness of the rest of the inner cutter 143 to increase strength.

As shown in fig. 18, a bearing 191 is disposed on the inner knife handle 15 at the rear side of the suction hole 151, the rear end of the mandrel 161 passes through the bearing 191 and is in transmission connection with the second interface, a second sealing ring 192 is disposed at the front side of the bearing 191, the second sealing ring 192 is used for preventing cutting tissues and cooling liquid in operation from entering the rear end, a clamping spring 193 is disposed at the rear side, and the clamping spring 193 is used for fixing the position of the bearing 191. Axial and radial positioning of the rear end of the mandrel 161 is achieved by bearings 191.

When the chip removing part 16 rotates, the cooling liquid is driven to flow (the chip removing part 16 rotates in one direction in the inner cutter tube 14 to form a pumping effect), and a negative pressure area is further formed in the inner cutter tube 14 by reinforcing, so that the inner cutter head 143 and the inner cutter tube 14 obtain larger suction force, and the cutting and suction capability of tissues is further enhanced. When the planing tool 1 is installed on the planing handle 2 and connected with the negative pressure suction pipe, the negative pressure switch control valve is opened to start operation, under the combined action of the suction force formed by the additional fluid flow formed by the suction negative pressure and the chip removing piece 16, the human tissue which is planed by the operation quickly enters the suction hole 151 of the outer cutter handle 12 through the inner cutter pipe 14, and further enters the negative pressure suction channel 211 through the negative pressure suction switch control valve, so that the human tissue is quickly discharged, and the operation is completed.

In this embodiment, since the inner cutter assembly requires forward and reverse reciprocal rotation, the first output portion of the cutter driving device outputs forward rotational torque and reverse rotational torque, and the chip ejection member 16 is rotatable only in the forward direction, the second interface and the second output portion are configured such that when the second output portion rotates in the forward direction, the second output portion is coupled to the second interface to transmit the forward rotational torque to the chip ejection member 16, and when the second output portion rotates in the reverse direction, the second output portion is decoupled from the second interface to not transmit the reverse torque.

As shown in fig. 19-22, the chip ejection assembly further includes a unidirectional rotation sleeve 17 as an example, the unidirectional rotation sleeve 17 is rotatably disposed in the rear end of the inner shank 15, the rear end of the unidirectional rotation sleeve 17 is provided with the second interface, and the unidirectional rotation sleeve 17 is in transmission connection with the spindle 161.

As shown in fig. 23 and 24, the second interface includes at least two interface grooves 171 arranged at intervals along the rotation direction, the groove wall of the interface groove 171 includes a working surface 171a, a sliding surface 171b and a transition surface 171c, the working surface 171a is an arc surface matching with the cylindrical surface 262a of the second output part, the rear end of the working surface 171a of one interface groove 171 along the forward rotation direction is connected with the front end of the sliding surface 171b thereof along the forward rotation direction, and the front end of the working surface 171a of one interface groove 171 along the forward rotation direction is connected with the rear end of the sliding surface 171b of the next interface groove 171 along the forward rotation direction through the transition surface 171 c. When the second output part rotates in the forward direction, the cylindrical surface 262a of the second output part is combined with the working surface 171a of the second interface to transmit forward rotation torque to the chip removing part 16 to drive the chip removing part 16 to rotate in the forward direction, and when the second output part rotates in the reverse direction, the working surface 171a slides along the sliding surface 171b to finally slide into the other interface groove 171, so that reverse torque is not transmitted, the chip removing part 16 keeps intermittent forward rotation, and high-frequency intermittent backward powerful chip breaking and chip removing are realized.

As shown in fig. 19-27, the inner cutter assembly of the chip removing assembly further includes a connecting sleeve 18 as an example, the connecting sleeve 18 is disposed in the unidirectional rotation pushing sleeve 17 and connected with the unidirectional rotation pushing sleeve 17, the connecting sleeve 18 rotates synchronously with the unidirectional rotation pushing sleeve 17 and can slide axially relative to the unidirectional rotation pushing sleeve 17, a front end of the connecting sleeve 18 is in transmission connection with a rear end of the chip removing member 16, and an elastic restoring member is used for restoring the unidirectional rotation pushing sleeve 17, and the elastic restoring member is a spring 183 as an example.

As an example, the unidirectional rotation sleeve 17 is provided with an axially extending chute 172, the connection sleeve 18 is provided with a radially extending slide pin 182, and the slide pin 182 is inserted into the chute 172. The unidirectional rotation push sleeve 17 is provided with a mounting hole 173 extending along the axial direction, and the spring 183 and the connecting sleeve 18 are mounted in the mounting hole 173. The front end of the connecting sleeve 18 is provided with a connecting port 181 connected with the chip removing member 16, the connecting port 181 is a polygonal hole, and the rear end of the mandrel 161 is provided with a polygonal joint 161b matched with the connecting port 181.

As shown in fig. 19 to 22, the shaving handle 2 includes a housing 21 and a cutter driving device provided in the housing 21, an insertion port into which an outer handle of the shaving cutter is inserted is provided at a front end of the housing 21, a suction passage 211 is further provided on the housing 21, and a switch control valve 212 for opening and closing the suction passage 211 is provided on the suction passage 211. One end of the suction channel 211 is opposite to the suction hole of the inner handle, and the other end is connected to a negative pressure system (not shown) through a negative pressure suction pipe 213.

The tool driving device includes a first output portion including two driving claws 251b arranged at 180 ° in a rotation direction and a second output portion. The second output part comprises a pin shaft 261 extending along the radial direction and a sliding bearing 262, two ends of the pin shaft 261 are respectively fixed on the two driving claws 251b, the sliding bearing 262 is sleeved on the pin shaft 261, and the outer circumferential surface of the sliding bearing 262 is the cylindrical surface 262a.

When the driving pawl 251b rotates in the forward direction, the slide bearing 262 has an interaction force with the working surface 171a of the interface groove 171, rotates in the forward direction together with the driving pawl 251b, and simultaneously rotates in the forward direction together with the chip removing member 16, and the tissue chip is broken and strongly transferred backward to the suction channel 211. When the driving pawl 251b rotates reversely, the slide bearing 262 slides rearward along the slide surface 171b of the interface groove 171, the spring 183 is compressed by the reaction force of the slide surface 171b, the one-way rotation push sleeve 17 slides leftward, and the slide bearing 262 on the right end surface of the one-way rotation push sleeve 17 is kept to slide continuously due to the interaction, at this time, the chip removing member 16 is kept in a non-rotating or intermittent micro-rotating state due to the fact that the chip removing member cannot receive the effective driving of the torque and the negative pressure suction of the inner cutter tube 14 reacts. When the handle is moved to the next forward rotation cycle, the chip ejection member 16 enters the next cycle for continuous forward rotation, and for continuous chip breaking and strong suction chip ejection.

The motor 22 typically outputs high revolution, low torque power, which must be converted to meet the demands of the medical planing tool 1 for operation at low revolution, high torque and flexible input power with overload constraints. As shown in fig. 28-29, the tool driving device further comprises a gearbox and a magnetic transmission device, wherein the output shaft of the motor 22 is connected with the input end of the gearbox, the output end of the gearbox is connected with the input end of the magnetic transmission device, and the output end of the magnetic transmission device is connected with the driving claw 251 b. The power output by the motor 22 is coupled to the gearbox and further output to the magnetic drive, ultimately outputting power to the inner cutter assembly and chip ejection member 16. Because the spindle 161 of the chip removing member 16 has a small diameter and a long length, and has relatively low strength, the chip removing member 16 is prevented from being rigidly connected with the motor 22 by adopting a magnetic transmission device, which is beneficial to prolonging the service life of the product. As an example, the speed reducer 23 is a planetary speed reducer 23, and the reduction ratio may be up to 2 to 10 times.

As shown in fig. 29, the magnetic transmission device comprises an input magnetic rotor assembly 24 and an output magnetic rotor assembly 25, wherein the input magnetic rotor assembly 24 is in transmission connection with the output shaft of the motor 22, and the output magnetic rotor assembly 25 is connected with the first output part. The input magnetic rotor assembly 24 comprises an input magnetic pole bushing 241 and an input magnet 242, wherein the input magnetic pole bushing 241 comprises a cylindrical main body part and a shaft part extending forwards from the front end surface of the main body part, the input magnet 242 is arranged in the main body part, the output magnetic rotor assembly 25 comprises an output magnetic pole bushing 251 and an output magnet 252, the rear end of the output magnetic pole bushing 251 is sleeved on the shaft part, the output magnet 252 is arranged in the rear end of the output magnetic pole bushing 251, and the front end of the output magnetic pole bushing 251 is provided with the first output part. Compared with direct rigid connection, the magnetic flexible connection transmission between the two magnetic rings can effectively eliminate the influence of inertia under the high-frequency reciprocating rotation of 1-5 HZ, so that the power output to the spiral chip cleaner and the inner cutter bit 143 is more stable, the effect of flexible power transmission is achieved, and in addition, when the torque is transmitted through the magnetism of the two magnetic rings, the magnetic flexible connection transmission device has an overload protection function when abnormal overload is encountered, the overload protection can be effectively carried out on the spiral chip cleaner and the cutter, the service life is prolonged, and the use effect is ensured. Moreover, through the penetrability effect of magnetic force of the magnetic ring, the input magnetic pole bushing 241 can be designed to be totally enclosed, physiological saline in the cutter and tissues cut in operation can be totally isolated, and the physiological saline can not enter into structures such as a reduction gearbox and a micro motor 22, so that the sealing performance of a handle is facilitated, and the service life is prolonged and the later maintenance performance is improved.

The cutter driving device further comprises a positioning sleeve 27 for positioning the inner cutter assembly, the positioning sleeve 27 can be arranged in the front end of the output magnetic pole bushing 251 in an interference fit mode, a through hole for the second output part to pass through is formed in the positioning sleeve 27, and the front end face of the positioning sleeve 27 can axially limit the inner cutter assembly, so that the cutter driving device has the advantages of being simple in structure, stable in driving and convenient to install. An end face pressure bearing is arranged between the positioning sleeve 27 and the front end of the shaft part, and the positioning sleeve 27 is propped against the end face pressure bearing backwards, so that interference between the inner cutter assembly and the front end of the shaft part in the rotating process is avoided.

The medical chip removal device in the embodiment has the following beneficial effects:

1. the inner knife assembly is provided with the chip removing piece for sucking, cutting and conveying the shaved tissues, the first section of spiral blade is provided with the chip breaking dividing groove, the tissues can be effectively sucked into the inner knife tube, the tissues are cut in the connecting area of the inner knife head and the inner knife tube, the tissues are pushed to the suction hole through the spiral chip removing structure, and the tissues further enter the negative pressure suction channel through the negative pressure suction switch control valve, so that the tissues are rapidly discharged, and the operation is completed. The problem of cutter blockage is avoided, and the cutting efficiency is improved. And when the chip removing piece rotates, the cooling liquid is driven to flow to form a reinforced negative pressure area, and the cutter head and the cutter tube obtain larger suction force.

2. The chip removing piece is connected with the pushing sleeve pin shaft of the planing handle and the sliding bearing structure through structures such as a connecting sleeve at the tail end of the inner cutter handle, a one-way rotating pushing sleeve and the like, so that one-way rotating power is obtained. The chip removing part and the inner cutter tube assembly share one motor, so that the chip removing function is added, and meanwhile, the power mechanism is changed slightly, and the cost is reduced.

3. In the scheme, the cutting edge parts of the inner cutter head and the outer cutter head are provided with the chip breaking structures which are staggered in position and mutually meshed, so that all the cutting areas of the cutting edge parts are integrated into zero, the tissue is easy to cut off and suck, and the cutting and sucking capacity to the tissue is further enhanced.

In conclusion, this scheme can effectively promote planer tool cutting, chip breaking efficiency, has powerful chip breaking and pumps the characteristics of chip removal, can effectively avoid the planer tool to block up in the operation, can very big save operation time, guarantees doctor's operation rhythm, will promote doctor's experience sense to the product by a wide margin.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. An anti-clogging medical planing device comprising:

The planing tool comprises an outer tool assembly and an inner tool assembly, wherein the inner tool assembly is arranged in the outer tool assembly;

A planing handle comprising a housing and a cutter driving device disposed within the housing, the cutter driving device comprising a first output for driving the inner cutter assembly in forward and/or reverse rotation;

the planing tool is characterized by further comprising:

The chip removing assembly comprises a chip removing piece, wherein the chip removing piece is arranged in the inner cutter assembly and comprises a mandrel and helical blades which are arranged on the peripheral surface of the mandrel and extend along the helical direction;

The planing handle also comprises a second output part, wherein the second output part is used for driving the chip removing piece to rotate in the forward direction so as to drive tissues in the inner knife assembly to be conveyed from front to back;

The spiral blade comprises a first section of spiral blade and other sections of spiral blades, wherein the outer diameter edge of the first section of spiral blade is provided with a cutting edge which is matched with the inner wall of the inner cutter assembly to cut off tissues, at least one chip breaking dividing groove is arranged on the outer diameter edge of the first section of spiral blade at intervals along the spiral direction to divide the cutting edge into at least two sections, and the rear groove wall of the chip breaking dividing groove along the forward rotation direction is inclined towards the rear side of the forward rotation direction relative to the axis of the mandrel so that the rear groove wall intersects with the surface of the first section of spiral blade to form a cutting edge.

2. The anti-jam medical shaving apparatus of claim 1 wherein the pitch of the first segment of helical blades is less than the pitch of the remaining segments of helical blades.

3. The anti-clogging medical shaving apparatus of claim 1, wherein the outer diameter of the first section of helical blades gradually increases from the front end to the rear end and then gradually decreases.

4. The anti-clogging medical shaving apparatus of claim 1, wherein the remaining section of the helical blades include a second section of the helical blade located in front of the first section of the helical blade, a rear end of the second section of the helical blade being connected to a front end of the first section of the helical blade, an outer diameter of the second section of the helical blade being gradually increased from the front end to the rear end, the remaining section of the helical blade including a third section of the helical blade located behind the first section of the helical blade, a front end of the third section of the helical blade being connected to a rear end of the first section of the helical blade.

5. The anti-jam medical planing device according to any one of claims 1 to 4, wherein the second output portion rotates forward or reverse in synchronization with the forward or reverse rotation of the first output portion, the chip ejection assembly further comprising a second interface connected to the chip ejection member, the second output portion being coupled to the second interface to transmit forward rotation torque to the chip ejection member when the second output portion rotates forward, and the second output portion being decoupled from the second interface to not transmit reverse torque when the second output portion rotates in reverse.

6. The anti-clogging medical shaving apparatus of claim 5, wherein the second output portion has a cylindrical surface extending in a radial direction, the second interface includes at least two interface grooves arranged at intervals along a rotation direction of the second output portion, a groove wall of the interface groove includes a working surface, a sliding surface, and a transition surface, the working surface is an arc surface mated with the cylindrical surface, a rear end of the working surface of one of the interface grooves along the forward rotation direction is connected to a front end of the sliding surface thereof along the forward rotation direction, and a front end of the working surface of one of the interface grooves along the forward rotation direction is connected to a rear end of the sliding surface of the next interface groove along the forward rotation direction through the transition surface.

7. The anti-clogging medical planing device according to claim 5, wherein the inner cutter assembly comprises an inner cutter tube and an inner cutter handle connected with the rear end of the inner cutter tube, the rear end of the inner cutter handle is provided with a first interface, the chip removal assembly further comprises a unidirectional rotation pushing sleeve rotatably arranged in the rear end of the inner cutter handle, the rear end of the unidirectional rotation pushing sleeve is provided with the second interface, and the unidirectional rotation pushing sleeve is in transmission connection with the mandrel.