CN219763491U - Integrated medical cutter and surgical instrument - Google Patents

Abstract

The utility model relates to an integrated medical cutter and a surgical instrument, which comprises a supporting component, a cutter bar and a positioning component, wherein the supporting component is used for being connected with a power handle, the cutter bar is rotatably arranged on the supporting component in a penetrating mode, one end of the cutter bar is provided with a cutting edge section, the cutting edge section penetrates through one end of the supporting component, the other end of the cutter bar is provided with a power connecting section, the power connecting section penetrates through the other end of the supporting component and is in transmission connection with the power handle, the positioning component is arranged between the supporting component and the cutter bar, and the positioning component is used for limiting the cutter bar in the supporting component in the axial direction. The integrated medical cutter is simple to install, small in size and convenient to operate, and a doctor can operate by adopting a pen.

Description

Integrated medical cutter and surgical instrument

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an integrated medical cutter and a surgical instrument.

Background

Medical cutters are often used for operation in orthopedic or surgical operations such as spinal surgery, arthroscopic surgery, joint replacement surgery, craniotomy, otorhinolaryngological surgery, transnasal craniotomy, laparoscopic surgery, cosmetic micro-plastic surgery, and the like. With the development of surgical operations, particularly minimally invasive operations, surgical instruments are also evolving towards lighter weight, ease of installation, and automation.

The traditional medical cutter needs to be installed in the chuck or other intermediate pieces firstly, then the chuck or the intermediate piece is connected with the power handle, and before the cutter bar is installed in the chuck or the intermediate piece, the cutter bar can be installed in the chuck or the intermediate piece only after the chuck or the intermediate piece is adjusted by adopting a key accessory matched with the cutter bar, so that the installation is complicated, and when the cutter bar with different types is replaced in an operation, the operation is prolonged, and the infection risk of a patient is increased. Moreover, the traditional clamping head or the middle piece has larger volume and heavier weight, is inconvenient to operate in the operation, and is inconvenient to perform high-precision minimally invasive operation.

Disclosure of Invention

Based on this, it is necessary to provide an integrated medical cutter and surgical instrument, and the installation of integrated medical cutter is simple, and small in size, doctor can adopt the operation of holding a pen, simple operation.

In one aspect the present utility model provides an integrated medical cutter comprising:

the support assembly is used for being connected with the power handle; the method comprises the steps of,

the cutter bar is rotatably arranged on the supporting component in a penetrating manner, one end of the cutter bar is provided with a cutting edge section, the cutting edge section penetrates through one end of the supporting component, the other end of the cutter bar is provided with a power connecting section, and the power connecting section penetrates through the other end of the supporting component and is in transmission connection with the power handle; the method comprises the steps of,

the positioning assembly is arranged between the supporting assembly and the cutter bar and is used for limiting the cutter bar to the supporting assembly in the axial direction.

The technical scheme of the utility model is further described as follows:

in one embodiment, the support assembly includes:

the support piece is sleeved outside the cutter bar; the method comprises the steps of,

the support handle body, support the handle body cover and locate outside the support piece, the periphery side of support handle body is equipped with the connection structure who is used for dismantling with the power handle and connects.

In one embodiment, the support member includes a connection section penetrating through the support handle body and a body section exposed out of the support handle body, a fastening groove is formed on the outer peripheral side of the connection section, a fastening rib is formed on the inner wall of the support handle body, and the fastening rib is clamped in the fastening groove.

In one embodiment, a first external thread is provided on the outer peripheral side of the support member, the support shank is provided with a first internal thread connected with the first external thread, and the rotation direction of the first external thread and the rotation direction of the first internal thread are opposite to the rotation direction of the cutter bar.

In one embodiment, the support member is provided with a support boss, and a limit step surface is formed on the inner wall of the support handle body and is abutted to the support boss.

In one embodiment, the cutter bar further comprises a main body section and a boss section which are connected, the main body section is connected with the cutting edge section, the boss section is connected with the power connection section and protrudes radially relative to the main body section, a positioning step surface is formed on the inner wall of the supporting component, the positioning step surface is abutted to one end, close to the main body section, of the boss section, and the positioning component is abutted to one end, away from the main body section, of the boss section.

In one embodiment, the positioning assembly comprises:

the positioning sliding sleeve is arranged between the power connecting section and the supporting component, and is abutted with one end, far away from the main body section, of the boss section; the method comprises the steps of,

the positioning retaining sleeve is connected with the supporting component, and the positioning retaining sleeve is abutted to one end, away from the boss section, of the positioning sliding sleeve.

In one embodiment, the positioning assembly further comprises an anti-friction member disposed between the positioning sleeve and the boss section.

In one embodiment, the anti-friction member comprises a thrust bearing or a friction pad.

In one embodiment, the positioning sliding sleeve is provided with a positioning protrusion protruding along the radial direction, the inner wall of the supporting handle body is provided with a positioning groove, and the positioning protrusion is arranged in the positioning groove.

In one embodiment, a flexible inner tube is provided between the body section and the support assembly; and/or a sliding sleeve is arranged between the boss section and the supporting component.

In one embodiment, the connecting structure comprises a positioning key arranged on the outer peripheral side of the supporting component; the positioning key is used for being inserted into the positioning groove of the power handle; and/or the connecting structure comprises a ring groove arranged on the outer peripheral side of the supporting component, and the ring groove is used for being matched with the ball component of the power handle.

In one embodiment, the integrated medical cutter further comprises a sealing ring sleeved on the outer peripheral side of the support assembly.

On the other hand, the utility model also provides a surgical instrument which comprises the power handle and the integrated medical cutter, wherein the power handle is connected with the supporting component and is used for driving the cutter bar to rotate.

According to the integrated medical cutter and the surgical instrument, the cutter bar is rotatably arranged in the supporting component in a penetrating mode, the integrated medical cutter can be quickly mounted on the power handle through the connecting structure on the supporting component, compared with a traditional cutter which is required to be connected to the power handle through the clamping head or the handle, the integrated medical cutter can be quickly mounted without using additional parts, the operation is more convenient, and due to the fact that the supporting component is integrated with the connecting structure, the integral size of the integrated medical cutter is smaller, a doctor can adopt a pen-holding type operation, the operation flexibility is greatly improved, the doctor can realize fine microscopic operation in a small area, and the fine degree of the doctor operation is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a medical milling cutter of a first embodiment;

FIG. 2 is an exploded view of the medical milling cutter shown in FIG. 1;

FIG. 3 is a top view of the medical milling cutter shown in FIG. 1;

FIG. 4 is a partial cross-sectional view of the medical milling cutter shown in FIG. 3, taken at section A-A;

FIG. 5 is an elevation view of the medical milling cutter shown in FIG. 1;

FIG. 6 is a partial cross-sectional view of the medical milling cutter shown in FIG. 5, taken at section B-B;

FIG. 7 is a schematic view showing the structure of a cutter bar according to the first embodiment;

FIG. 8 is a schematic structural view of the support assembly of the first embodiment;

FIG. 9 is a structural exploded view of the support assembly shown in FIG. 8;

FIG. 10 is a schematic view of the structure of the support handle of the first embodiment;

FIG. 11 is a structural cross-sectional view of the support shank shown in FIG. 10;

FIG. 12 is a schematic view of the positioning sleeve according to the first embodiment;

FIG. 13 is a schematic view showing the force applied to the medical milling cutter according to the first embodiment during milling;

FIG. 14 is a structural exploded view of a surgical instrument according to one embodiment;

fig. 15 is a schematic structural view of a medical bone drill of a second embodiment;

FIG. 16 is an exploded view of the structure of the medical bone drill shown in FIG. 15;

FIG. 17 is a top view of the medical bone drill shown in FIG. 15;

FIG. 18 is a partial cross-sectional view of the medical bone drill shown in FIG. 17, taken at section A-A;

FIG. 19 is an elevation view of the medical bone drill shown in FIG. 15;

FIG. 20 is a partial cross-sectional view of the medical bone drill shown in FIG. 19, taken at section B-B;

FIG. 21 is a schematic view showing the structure of a cutter bar according to a second embodiment;

fig. 22 is a schematic structural view of a support member of the second embodiment;

FIG. 23 is a schematic view of the structure of the support handle of the second embodiment;

FIG. 24 is a schematic view of the support shank shown in FIG. 23 from another perspective;

FIG. 25 is a structural cross-sectional view of the support shank shown in FIG. 24;

FIG. 26 is a schematic structural view of a positioning sleeve according to a second embodiment;

FIG. 27 is a schematic view of the force applied to the integrated medical tool during milling according to the second embodiment;

fig. 28 is a structural exploded view of the surgical instrument of the second embodiment.

Reference numerals illustrate:

1. a medical milling cutter; 11. a support; 111. a body section; 112. a connection section; 113. a support boss; 114. a fastening groove; 115. positioning the step surface; 12. a support handle body; 121. a first step surface; 122. a second step surface; 123. a ring groove; 124. anti-skid lines; 125. fastening the convex ribs; 127. a positioning groove; 13. a cutter bar; 131. a blade section; 132. a power connection section; 133. a main body section; 134. a land section; 151. a flexible inner tube; 152. a sliding sleeve; 153. positioning a sliding sleeve; 154. positioning a blocking sleeve; 155. a friction pad; 156. positioning the bulge; 16. a seal ring; 17. a positioning key; 2. medical bone drill; 21. a support; 213. a support boss; 214. a first external thread; 215. positioning the step surface; 22. a support handle body; 221. limiting step surfaces; 223. a ring groove; 224. anti-skid lines; 225. a first internal thread; 227. a positioning groove; 23. a cutter bar; 231. a blade section; 232. a power connection section; 233. a main body section; 234. a land section; 251. a flexible inner tube; 252. a sliding sleeve; 253. positioning a sliding sleeve; 254. positioning a blocking sleeve; 255. a thrust bearing; 256. positioning the bulge; 26. a seal ring; 27. a positioning key; 3. a power handle.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

The integrated medical cutter of the present utility model is further described below by taking a medical milling cutter and a medical bone drill as examples, and it should be noted that the integrated medical cutter of the present utility model is not limited to the medical milling cutter and the medical bone drill, but may be other surgical cutters.

First embodiment

Specifically, referring to fig. 1 and 2, the medical milling cutter 1 of an embodiment includes a support assembly, a cutter bar 13 and a positioning assembly, wherein the support assembly is used for supporting the cutter bar 13 and the positioning assembly, and a connection structure for detachably connecting with a power handle is disposed on an outer peripheral side of the support assembly. The cutter arbor 13 rotationally wears to locate supporting component, and the one end of cutter arbor 13 is equipped with cutting edge section 131, and cutting edge section 131 is equipped with the milling edge, and cutting edge section 131 wears in supporting component. The other end of the cutter bar 13 is provided with a power connecting section 132, and the power connecting section 132 penetrates through the supporting component and is used for being in transmission connection with the power handle. The locating component is arranged between the supporting component and the cutter bar 13, and the locating component is used for limiting the cutter bar in the supporting component in the axial direction.

According to the medical milling cutter 1, the cutter bar 13 is rotatably arranged in the supporting component in a penetrating mode, and the connecting structure is arranged on the supporting component, so that the medical milling cutter 1 can be quickly installed on the power handle through the connecting structure on the supporting component.

Referring to fig. 3 to 6, specifically, in the present embodiment, the support assembly includes a support 11 and a support handle 12, wherein the support 11 is sleeved outside the cutter bar 13, the support handle 12 is sleeved outside the support 11, the support handle 12 is thermally inlaid and fixed with the support 11, and the connection structure is disposed on the outer peripheral side of the support handle 12. Wherein, the hot-inlaid fixation means that the supporting piece 11 and the supporting handle body 12 are integrally formed through injection molding or hot-inlaid.

Preferably, in the present embodiment, the material of the supporting member 11 is a metal material such as stainless steel, so as to increase the supporting performance of the supporting member 11 on the cutter bar 13 and prevent the cutter bar 13 from breaking during high-speed movement. The material of the support handle body 12 is a polymer plastic material, for example, a polymer plastic material such as PEI, ABS, PC, and when manufacturing, the support 11 is used as an insert of the injection support handle body 12, before injection molding, the support 11 is put into a mold for manufacturing the support handle body 12, and then a plastic material is injected into the mold, so that the plastic material is solidified to form the support handle body 12, and the support handle body 12 and the support 11 are fastened and connected into a whole. The support piece 11 through injection molding or hot insert integrated into one piece is connected more firmly with the support handle body 12, can bear bigger cutting reaction force, has guaranteed that supporting component has better intensity and wearability for the handle of a knife of high-speed rotation, has guaranteed the good support to cutter arbor 13, in addition through injection molding or hot insert integrated into one piece, can realize that the support piece 11 is fixed as an organic whole with the support handle body 12 can directly form the inner chamber structure and the connection structure of outer peripheral face of support handle body 12 through the mould, has avoided needing later processing to more do benefit to supporting component's mass production, improved production efficiency.

Further, referring to fig. 8 and 9, the supporting member 11 includes a connecting section 112 penetrating through the supporting handle 12 and a body section 111 exposed outside the supporting handle 12, a fastening groove 114 is formed on an outer peripheral side of the connecting section 112, a fastening rib 125 is formed on an inner wall of the supporting handle 12, and the fastening rib 125 is disposed in the fastening groove 114. By penetrating the connecting section 112 of the support 11 into the support shank 12, a radial fixation of the support 11 to the support shank 12 is achieved. Meanwhile, the fastening groove 114 is formed in the connecting section 112, when the support handle body 12 is injection molded, the fastening ribs 125 can be formed on the inner wall of the support handle body 12, and the fastening ribs 125 can be embedded into the fastening groove 114, so that circumferential fixation of the support piece 11 and the support handle body 12 is realized, relative rotation of the support piece 11 and the support handle body 12 under the influence of high-speed rotation is avoided, and the connection stability of the support piece 11 and the support handle body 12 is improved. Preferably, the outer circumferential side of the supporting member 11 is provided with a plurality of fastening grooves 114, and correspondingly, the inner wall of the supporting handle body 12 is formed with a plurality of fastening ribs 125, thereby further improving the circumferential positioning of the supporting member 11 and the supporting handle body 12.

Further, referring to fig. 6, the connection section 112 is provided with a supporting boss 113, and a limiting step surface is formed on the inner wall of the supporting handle 12 and abuts against the supporting boss 113 to axially fix the supporting member 11. Specifically, when the support handle body 12 is formed by injection molding or hot inlaying, the limiting step surface comprises a first step surface 121 and a second step surface 122 which are formed on the inner wall of the support handle body 12 at intervals, the first step surface 121 is abutted with one end of the support boss 113, and the second step surface 122 is abutted with the other end of the support boss 113, so that the axial fixation of the support piece 11 and the support handle body 12 is realized, and the connection stability of the support piece 11 and the support handle body 12 is further improved.

Specifically, referring to fig. 4 and 7, the cutter bar 13 includes a body section 133 and a boss section 134, the body section 133 is connected with the blade section 131, the boss section 134 connects the body section 133 with the power connection section 132, and the boss section 134 protrudes radially from the body section 133. The inner wall of the support piece 11 is provided with a positioning step surface 115, the positioning step surface 115 is abutted with one end, close to the main body section 133, of the boss section 134, and the positioning assembly is abutted with one end, far away from the main body section 133, of the boss section 134, so that axial limiting of the cutter bar 13 is achieved.

Specifically, referring to fig. 4 and 6, the positioning assembly includes a positioning slide sleeve 153 and a positioning stop sleeve 154, wherein the positioning slide sleeve 153 is disposed between the tool bar 13 and the support shank 12, and the positioning slide sleeve 153 abuts an end of the boss section 134 remote from the main body section 133. The positioning sleeve 154 is connected with the support handle body 12, and the positioning sleeve 154 is abutted with one end of the positioning sliding sleeve 153 away from the boss section 134, so that the positioning sliding sleeve 153 is limited in the support handle body 12.

Specifically, the cutter bar 13 is penetrated into the supporting component, so that the radial positioning of the cutter bar 13 is realized. Meanwhile, the positioning step surface 115 and the positioning sliding sleeve 153 are respectively abutted with two ends of the boss section 134 of the cutter bar 13, so that the axial positioning of the cutter bar 13 is realized, radial runout and axial runout of the cutter bar 13 rotating at high speed are avoided, the stability of the medical milling cutter 1 during milling is improved, and the milling effect is improved.

Further, referring to fig. 10 to 12, the positioning sliding sleeve 153 is provided with a positioning protrusion protruding along a radial direction, the inner wall of the support handle body 12 is provided with a positioning groove 127, and the positioning protrusion is arranged in the positioning groove 127, so that the positioning sliding sleeve 153 and the support handle body 12 are positioned circumferentially, and the positioning sliding sleeve 153 is prevented from rotating relative to the support handle body 12 under the driving of the cutter bar 13. Preferably, at least two positioning protrusions are disposed on the outer peripheral side of the positioning sliding sleeve 153, at least two positioning grooves 127 are disposed on the inner wall of the support handle body 12, and the positioning protrusions are disposed in the positioning grooves 127 in a one-to-one correspondence manner, so as to improve the circumferential positioning effect of the positioning sliding sleeve 153 and the support handle body 12.

Preferably, the positioning retaining sleeve 154 is in threaded connection with the support handle body 12, so that the positioning retaining sleeve 154 is relatively fixed with the support handle body 12, and further, the positioning retaining sleeve 154 and one end far away from the positioning sliding sleeve 153 are provided with avoiding grooves, so that the positioning retaining sleeve 154 is prevented from interfering with an output assembly when the cutter bar 13 is matched with the output assembly of the power handle.

With continued reference to fig. 4 and 6, a sliding sleeve 152 is provided between the land 134 of the knife bar 13 and the support 11. Preferably, the sliding sleeve 152 and the positioning sliding sleeve 153 are made of copper alloy materials with wear resistance and self-lubrication characteristics, so that the cutter bar 13 can serve as a sliding bearing to reduce rotation resistance of the cutter bar 13 rotating at a high speed while providing better radial positioning and axial positioning for the cutter bar 13, and the cutter bar 13 can rotate smoothly at a high speed relative to the support piece 11 and the support handle body 12.

Further, a flexible inner tube 151 is provided between the main section 133 of the cutter bar 13 and the support 11. An anti-friction member is provided between the positioning slide 153 and the boss section 134 to reduce wear between the positioning slide 153 and the boss section 134, preferably the anti-friction member is a friction washer 155. Preferably, the flexible inner tube 151 and the friction pad 155 are made of a polymer material with wear resistance and self-lubricating property. The friction pad 155 can effectively avoid friction loss between the boss 134 of the cutter bar 13 rotating at high speed and the end of the positioning sliding sleeve 153. The flexible inner tube 151 can radially support the cutter bar 13 and simultaneously can absorb shock to the cutter bar 13, so that the cutter bar 13 made of metal material is prevented from being directly collided with the supporting piece 11 made of metal material to cause damage. Preferably, the flexible inner tube 151 can be fixed by injection molding or hot-inlay outside the main section 133 of the cutter bar 13 or in the inner wall of the support 11.

Referring to fig. 13, the medical milling cutter 1 is mainly subjected to a milling reaction force F in the opposite direction of the milling direction, i.e., in the radial direction of the cutter bar 13, when milling bone tissue during surgery. According to the medical milling cutter 1 disclosed by the utility model, the flexible inner tube 151, the sliding sleeve 152, the positioning sliding sleeve 153 and the positioning step surface 115 can provide better radial positioning and axial positioning for the cutter bar 13, so that the slender rod-shaped cutter bar 13 can bear larger radial milling reaction force F without breaking and loosening, and the support handle body 12 and the support piece 11 which are integrally formed by hot inlaying have good structural stability, so that the medical milling cutter 1 is ensured to have good milling performance on bone tissues in an operation.

Further, when the medical milling cutter 1 is mounted to the power handle, the support shank 12 is penetrated into the power handle, thereby radially positioning the medical milling cutter 1. Further, referring to fig. 3 and 4, the connecting structure includes a positioning key 17 provided on the outer peripheral side of the support handle body 12; the positioning key 17 is used for being inserted into a positioning groove of the power handle, so that the circumferential positioning of the medical milling cutter 1 is realized. Further, in the present embodiment, the connection structure further includes a ring groove 123 provided at the outer circumferential side of the support handle body 12, the ring groove 123 being for cooperation with the ball assembly of the power handle. Specifically, the ball assembly can be embedded into the annular groove 123, so that the axial positioning of the medical milling cutter 1 is realized to lock the medical milling cutter 1 and the power handle, and the quick connection of the medical milling cutter 1 and the power handle is realized. The ball assembly can also be withdrawn from the ring groove 123 to unlock the medical milling cutter 1 to quickly separate the medical milling cutter 1 from the power handle.

With continued reference to fig. 4, the medical milling cutter 1 further includes a sealing ring 16, and the sealing ring 16 is sleeved outside the support handle body 12. Specifically, the sealing ring 16 is used for filling a fit gap between the supporting handle body 12 and the power handle, so that the supporting handle body 12 and the power handle form a sealing connection, and meanwhile, the sealing ring 16 can provide a certain damping effect, and the medical milling cutter 1 is prevented from being loose due to vibration of the medical milling cutter 1. Preferably, the support handle body 12 is sleeved with at least two sealing rings 16 at intervals along the axial direction, so that the sealing and damping effects are improved. Preferably, the sealing ring 16 is an O-ring rubber.

Further, referring to fig. 8, the outer peripheral side of the support handle body 12 is further provided with anti-slip lines 124 to facilitate the operator's insertion and extraction of the support handle body 12 into and from the power handle.

Second embodiment

Referring to fig. 15 and 16, the medical bone drill 2 of an embodiment includes a support assembly, a cutter bar 23 and a positioning assembly, wherein the support assembly is used for supporting the cutter bar 23 and the positioning assembly, and a connection structure for detachably connecting with a power handle is disposed on an outer peripheral side of the support assembly. The cutter bar 23 rotatably penetrates through the supporting component, one end of the cutter bar 23 is provided with a cutting edge section 231, the cutting edge section 131 is provided with a drilling edge, and the cutting edge section 231 penetrates through the supporting component. The other end of the cutter bar 23 is provided with a power connection section 232, and the power connection section 232 penetrates through the supporting component and is used for being in transmission connection with the power handle. The locating component is arranged between the supporting component and the cutter bar 23, and the locating component is used for limiting the cutter bar in the supporting component in the axial direction.

According to the medical bone drill 2, the cutter bar 23 is rotatably arranged in the supporting component in a penetrating mode, the connecting structure is arranged on the supporting component, so that the medical bone drill 2 can be quickly installed on the power handle through the connecting structure on the supporting component.

Referring to fig. 17 to 20, specifically, in the present embodiment, the support assembly includes a support 21 and a support shank 22, wherein the support 21 is sleeved outside the cutter bar 23, the support shank 22 is sleeved outside the support 21 and the support shank 22 is in threaded connection with the support 21, so that the support shank 22 and the support 21 are separable, and the medical bone drill 2 is more flexible to assemble and convenient to assemble. Further, a connection structure is provided on the outer peripheral side of the support handle 22.

Referring to fig. 22 and 23, in the present embodiment, preferably, the outer circumferential side of the support 21 is provided with a first external thread 214, the support shank 22 is provided with a first internal thread 225 connected to the first external thread 214, and the rotation direction of the first external thread 214 and the rotation direction of the first internal thread 225 are opposite to the rotation direction of the cutter bar 23. Namely, the first external thread 214 and the first internal thread 225 are both reverse threads, so that when the cutter bar 23 runs at a high speed in the forward direction, the combination of the support piece 21 and the support handle body 22 is always acted by the action force which gradually tends to tighten the threads, so that the support piece 21 and the support handle body 22 cannot be loosened gradually along the circumferential direction, and the structural reliability of the medical bone drill is ensured.

Preferably, in the present embodiment, the material of the supporting member 21 is a metal material such as stainless steel, so as to increase the supporting performance of the supporting member 21 on the cutter bar 23 and prevent the cutter bar 23 from breaking during high-speed movement. The material of the support handle 22 is a polymer plastic material, for example, a polymer plastic material such as PEI, ABS, PC.

Further, referring to fig. 20 to 22, the supporting member 21 is provided with a supporting boss 213, and the inner wall of the supporting handle 22 can be formed with a limiting step surface 221, and the limiting step surface 221 abuts against the supporting boss 213, so that the axial fixation of the supporting member 21 and the supporting handle 22 is realized, and the connection stability of the supporting member 21 and the supporting handle 22 is further improved.

Specifically, referring to fig. 18 and 21, the cutter bar 23 includes a body section 233 and a boss section 234, the body section 233 is connected with the blade section 231, the boss section 234 connects the body section 233 with the power connection section 232, and the boss section 234 protrudes radially from the body section 233. The inner wall of the support 21 is formed with a positioning step surface 215, and the positioning step surface 215 abuts against one end of the boss section 234 near the main body section 233. The positioning assembly abuts against one end, away from the main body section 233, of the boss section 234, so that axial limiting of the cutter bar 23 is achieved.

Further, with continued reference to fig. 18 and 20, the positioning assembly includes a positioning slide 253 and a positioning stop 254, wherein the positioning slide 253 is disposed between the knife bar 23 and the support shank 22, and the positioning slide 253 abuts an end of the boss section 234 remote from the main body section 233. The positioning retaining sleeve 254 is connected with the support handle body 22, and the positioning retaining sleeve 254 is abutted with one end of the positioning sliding sleeve 253, which is far away from the boss section 234, so that the positioning sliding sleeve 253 is limited in the support handle body 22.

Specifically, the cutter bar 23 is penetrated into the supporting component, so that the radial positioning of the cutter bar 23 is realized. Meanwhile, the positioning step surface 215 and the positioning sliding sleeve 253 are respectively abutted against the two ends of the boss section 234 of the cutter bar 23, so that the axial positioning of the cutter bar 23 is realized, the radial runout and the axial runout of the cutter bar 23 which rotate at high speed are avoided, the stability of the medical bone drill 2 during drilling is improved, and the drilling effect is improved.

Further, referring to fig. 24 to 26, the positioning sliding sleeve 253 is provided with a positioning protrusion 256 protruding in a radial direction, the inner wall of the support handle body 22 is provided with a positioning groove 227, and the positioning protrusion 256 is arranged in the positioning groove 227, so that the positioning sliding sleeve 253 and the support handle body 22 are circumferentially positioned, and the positioning sliding sleeve 253 is prevented from rotating relative to the support handle body 22 under the driving of the cutter bar 23. Preferably, at least two positioning protrusions 256 are disposed on the outer peripheral side of the positioning sliding sleeve 253, at least two positioning grooves 227 are disposed on the inner wall of the support handle 22, and the positioning protrusions 256 are disposed in the positioning grooves 227 in a one-to-one correspondence manner, so that the circumferential positioning effect of the positioning sliding sleeve 253 and the support handle 22 is improved.

Preferably, the positioning retaining sleeve 254 is in threaded connection with the support handle 22, so that the positioning retaining sleeve 254 and the support handle 22 are relatively fixed, and further, an avoidance groove is formed at one end of the positioning retaining sleeve 254 far away from the positioning sliding sleeve 253, so that the positioning retaining sleeve 254 is prevented from interfering with an output assembly of the power handle when the cutter bar 23 is matched with the output assembly.

With continued reference to fig. 18 and 20, a sliding sleeve 252 is provided between the boss section 234 of the knife bar 23 and the support 21. Preferably, the sliding sleeve 252 and the positioning sliding sleeve 253 are made of copper alloy materials with wear resistance and self-lubrication characteristics, so that the cutter bar 23 can be used as a sliding bearing to reduce rotation resistance when the cutter bar 23 is positioned in a radial direction and an axial direction, and the cutter bar 23 can rotate at a high speed and smoothly relative to the support piece 21 and the support handle body 22.

Further, a flexible inner tube 251 is provided between the main body section 233 of the knife bar 23 and the support 21. Preferably, the flexible inner tube 251 is made of a polymer material which is wear-resistant and has self-lubricating properties. The flexible inner tube 251 can radially support the cutter bar 23 and simultaneously can absorb shock to the cutter bar 23, so that the cutter bar 23 made of metal material is prevented from being directly collided with the supporting piece 21 made of metal material to cause damage. Preferably, the flexible inner tube 251 can be fixed by injection molding or hot-inlay outside the body section 233 of the knife bar 23 or in the inner wall of the support 21.

Referring to fig. 27, the medical bone drill 2 is mainly subjected to a drilling force F in a direction opposite to a drilling direction, i.e., in an axial direction of the cutter bar 23, when milling bone tissue during an operation. Preferably, referring to fig. 18 and 20, an anti-friction member is disposed between the positioning sliding sleeve 153 and the boss section 134, so as to reduce abrasion between the positioning sliding sleeve 153 and the boss section 134, preferably, in this embodiment, the anti-friction member is a thrust bearing 255, the thrust bearing 255 can enable the medical bone drill 2 to still operate smoothly, stably and reliably under the condition of bearing a large axial drilling force, and the operation process is not easy to generate heat and vibrate, so that good drilling performance of the medical bone drill 2 on bone tissues in operation is ensured.

Further, when the medical bone drill 2 is mounted to the power handle, the support shank 22 is penetrated into the power handle, thereby radially positioning the medical bone drill 2. Further, referring to fig. 17 and 18, the connecting structure includes a positioning key 27 provided on the outer peripheral side of the support handle 22; the positioning key 27 is used for being inserted into a positioning groove of the power handle, so that the circumferential positioning of the medical bone drill 2 is realized. Further, in the present embodiment, the connection structure further includes a ring groove 223 provided at the outer circumferential side of the support handle body 22, the ring groove 223 being for cooperation with the ball assembly of the power handle. Specifically, the ball assembly can be embedded in the annular groove 223, so that the medical bone drill 2 is axially positioned to lock the medical bone drill 2 and the power handle, and the medical bone drill 2 and the power handle are quickly connected. The ball assembly can also be withdrawn from the annular groove 223 to unlock the medical bone drill 2 to quickly separate the medical bone drill 2 from the power handle.

With continued reference to fig. 18, the medical bone drill 2 further includes a seal ring 26, the seal ring 26 being disposed about the support shank 22. Specifically, the sealing ring 26 is used for filling the fit clearance between the supporting handle body 22 and the power handle, so that the supporting handle body 22 and the power handle form a sealing connection, and meanwhile, the sealing ring 26 can provide a certain damping effect, so that the medical bone drill 2 is prevented from being loose due to vibration of the medical bone drill 2. Preferably, the support shank 22 is axially and alternately sleeved with at least two sealing rings 26, thereby improving sealing and damping effects. Preferably, the seal 26 is an O-ring rubber.

Further, referring to fig. 23, the outer peripheral side of the support handle body 22 is further provided with anti-slip lines 224 to facilitate the operator's insertion and extraction of the support handle body 22 into and from the power handle.

Referring to fig. 14 and 28, another aspect of the present utility model further provides a surgical instrument, where the surgical instrument according to one embodiment includes a power handle 3 and the integrated medical knife according to any one of the above embodiments, the power handle 3 is connected to the support handle body, and the power handle is used to drive a knife bar of the integrated medical knife to rotate.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. 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 utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" 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 used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (12)

1. An integrated medical cutter, comprising:

the support assembly is used for being connected with the power handle;

the cutter bar is rotatably arranged on the supporting component in a penetrating manner, one end of the cutter bar is provided with a cutting edge section, the cutting edge section penetrates through one end of the supporting component, the other end of the cutter bar is provided with a power connecting section, and the power connecting section penetrates through the other end of the supporting component and is in transmission connection with the power handle; the method comprises the steps of,

the positioning assembly is arranged between the supporting assembly and the cutter bar and is used for limiting the cutter bar to the supporting assembly in the axial direction.

2. The integrated medical cutter according to claim 1, wherein the cutter bar further comprises a main body section and a boss section which are connected, the main body section is connected with the blade section, the boss section is connected with the power connection section and protrudes radially relative to the main body section, a positioning step surface is formed on the inner wall of the supporting component, the positioning step surface is abutted with one end, close to the main body section, of the boss section, and the positioning component is abutted with one end, far away from the main body section, of the boss section.

3. The integrated medical cutter of claim 2, wherein the positioning assembly comprises:

the positioning sliding sleeve is arranged between the power connecting section and the supporting component, and is abutted with one end, far away from the main body section, of the boss section; the method comprises the steps of,

the positioning retaining sleeve is connected with the supporting component, and the positioning retaining sleeve is abutted to one end, away from the boss section, of the positioning sliding sleeve.

4. The integrated medical cutter of claim 3, wherein the positioning assembly further comprises an anti-friction member disposed between the positioning sleeve and the boss section.

5. The integrated medical cutter of claim 4, wherein the anti-friction member comprises a thrust bearing or a friction pad.

6. The integrated medical cutter according to claim 3, wherein the positioning sliding sleeve is provided with a positioning protrusion protruding along the radial direction, the inner wall of the supporting component is provided with a positioning groove, and the positioning protrusion is arranged in the positioning groove.

7. The integrated medical cutter of claim 6, wherein a flexible inner tube is disposed between the body section and the support assembly; and/or a sliding sleeve is arranged between the boss section and the supporting component.

8. The integrated medical cutter of claim 1, wherein the support assembly comprises:

the support piece is sleeved outside the cutter bar; the method comprises the steps of,

the support handle body, support the handle body cover and locate outside the support piece, the periphery side of support handle body is equipped with the connection structure who is used for dismantling with the power handle and connects.

9. The integrated medical cutter according to claim 8, wherein the supporting member comprises a connecting section penetrating through the supporting handle body and a body section exposed out of the supporting handle body, a fastening groove is formed on the outer peripheral side of the connecting section, a fastening convex rib is formed on the inner wall of the supporting handle body, and the fastening convex rib is clamped in the fastening groove.

10. The integrated medical cutter according to claim 8, wherein a first external thread is provided on an outer peripheral side of the support member, the support shank is provided with a first internal thread connected to the first external thread, and a rotation direction of the first external thread and a rotation direction of the first internal thread are opposite to a rotation direction of the cutter bar.

11. The integrated medical cutter according to claim 10, wherein the support member is provided with a support boss, and the inner wall of the support handle body is formed with a limit step surface, and the limit step surface abuts against the support boss.

12. A surgical instrument comprising a powered handle and an integrated medical cutter according to any one of claims 1-11, the powered handle being coupled to the support assembly and driving rotation of the cutter bar.