Ultrasonic bone grinding knife and ultrasonic bone grinding device

Abstract

The ultrasonic bone grinding knife comprises a knife handle, a knife rod and a knife head which are arranged in sequence, the knife rod comprises a first transmission part, a middle transmission part and a second transmission part which are arranged in sequence, and a spiral groove is formed in the middle transmission part; the spiral groove is used for converting axial vibration of the first transmission part into composite motion of reciprocating linear motion of the second transmission part in the axial direction and reciprocating rotary motion around the axis of the second transmission part, the cutter handle is arranged on the first transmission part, and the cutter head is arranged on the second transmission part. The tool bit can achieve the bone grinding action through the reciprocating linear motion along the axis of the tool bit and can also achieve the bone grinding action through the reciprocating rotary motion around the axis of the tool bit, the high-speed rotary bone grinding of an abrasive drill in the prior art can be completely replaced, and the bone grinding effect of the high-speed abrasive drill is achieved; in addition, the phenomenon that in the prior art, the abrasive drill winds the soft tissue of the human body is avoided, the occurrence probability of medical negligence is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to an ultrasonic bone grinding knife and a bone grinding device. Background Art

[0002] With the advancement of medical technology, minimally invasive surgery under perforaminal endoscopy has been widely used in orthopedic clinics. The existing power tools under perforaminal endoscopy mainly use high-speed grinding drills to grind bone tissue through the high-speed rotation of the drill bit. Since the grinding drill is in a high-speed rotation state, it is easy for the grinding drill to entangle the human soft tissue, produce a traction effect, cause bleeding, affect the surgical field of view, and easily cause medical accidents, resulting in low safety of bone grinding surgery. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an ultrasonic bone grinding knife and an ultrasonic bone grinding device, which can replace the high-speed grinding drill, avoid the occurrence of the grinding drill entangled in human soft tissue, and improve the safety of bone grinding surgery.

[0004] To achieve the above-mentioned purpose, the present invention provides an ultrasonic bone grinding knife, comprising a knife handle, a knife rod and a knife head arranged in sequence, the knife rod comprising a first transmission part, an intermediate transmission part and a second transmission part arranged in sequence, the intermediate transmission part is provided with a spiral groove, the spiral groove is used to convert the axial vibration of the first transmission part into a composite motion of reciprocating linear motion of the second transmission part along its axial direction and reciprocating rotational motion around its axis, the knife handle is arranged on the first transmission part, and the knife head is arranged on the second transmission part.

[0005] In one embodiment of the present invention, a plurality of the spiral grooves are provided, and the plurality of the spiral grooves are arranged axially on the intermediate transmission portion, and the spiral directions of the plurality of the spiral grooves are consistent.

[0006] In one embodiment of the present invention, the cutter head is provided with cutting teeth, the direction in which the cutter rod points to the cutter head is a first direction, and the cutting teeth extend from the end of the cutter head along the first direction.

[0007] In one embodiment of the present invention, a plurality of cutting teeth are provided, and the plurality of cutting teeth are arranged in a ring shape. The direction in which the cutter head points to the cutter rod is the second direction. An accommodating groove is provided at the axis of the cutting teeth arranged in a ring shape, and the accommodating groove extends from the center of the cutting tooth along the second direction.

[0008] In one embodiment of the present invention, the radially inward direction of the cutter head is a third direction, and the cutting teeth extend from an end of the cutter head along a superimposed direction of the first direction and the third direction.

[0009] On the other hand, an ultrasonic bone grinding device is provided, comprising a percutaneous foraminal endoscope, a vibration mechanism and the above-mentioned ultrasonic bone grinding knife, wherein the handle of the ultrasonic bone grinding knife is connected to the output shaft of the vibration mechanism, and the percutaneous foraminal endoscope is slidably mounted on the ultrasonic bone grinding knife.

[0010] In one embodiment of the present invention, it also includes an adapter sleeve, one end of which is in contact with or separated from the intervertebral foraminal mirror, and the other end of which is connected to the vibration mechanism. The handle of the ultrasonic bone grinder and the output shaft of the vibration mechanism are transmission-connected in the adapter sleeve.

[0011] In one embodiment of the present invention, the intervertebral foraminal endoscope includes an endoscope base and a working sleeve, wherein the working sleeve is arranged on the endoscope base, the blade rod of the ultrasonic bone grinder can be slidably passed through the endoscope base and the working sleeve, and the blade head of the ultrasonic bone grinder extends outside the working sleeve.

[0012] In one embodiment of the present invention, an optical base is provided on the hole mirror base, an optical input end and an optical output end are provided on the optical base, an optical collection part is provided on one end of the working sleeve close to the cutter head, and the optical input end and the optical output end are both connected to the optical collection part.

[0013] In one embodiment of the present invention, a first liquid inlet and a first liquid outlet are provided on the aperture mirror base, a second liquid inlet and a second liquid outlet are provided at the end of the working sleeve, a liquid inlet passage and a liquid outlet passage are provided inside the working sleeve, the first liquid inlet is connected to the second liquid outlet through the liquid inlet passage, and the first liquid outlet is connected to the second liquid inlet through the liquid outlet passage.

[0014] The above technical solution of the present invention has the following advantages compared with the prior art:

[0015] The ultrasonic bone grinding knife described in the present invention is provided with a spiral groove on the intermediate transmission part. Under the action of the spiral groove, the intermediate transmission part converts the vibration of the vibration mechanism into a composite motion of the second transmission part along its axial direction and reciprocating rotation around the axis of the intermediate transmission part. The composite motion is transmitted to the cutter head through the second transmission part. The cutter head can not only realize the bone grinding action by reciprocating linear motion along its axis, but also by reciprocating rotation motion around its axis. It can completely replace the high-speed rotation bone grinding of the grinding drill in the prior art, achieve the bone grinding effect of the high-speed grinding drill, and avoid the occurrence of the phenomenon of the grinding drill entangled with the human soft tissue in the prior art, reduce the probability of medical accidents, and improve the safety of bone grinding surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic structural diagram of the ultrasonic bone grinding knife of the present invention;

[0018] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0019] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0020] Figure 4 It is a schematic structural diagram of the cutting teeth of the ultrasonic bone grinder of the present invention;

[0021] Figure 5 Schematic diagram of the structure of the ultrasonic bone grinding device of the present invention (without the ultrasonic bone grinding knife installed);

[0022] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point C in the middle;

[0023] Figure 7 It is a partial cross-sectional structural schematic diagram of the ultrasonic bone grinding device of the present invention (with an ultrasonic bone grinding knife installed);

[0024] Figure 8 yes Figure 7 A partial enlarged schematic diagram of point D in the middle;

[0025] Fig. 9 yes Figure 7 A partial enlarged schematic diagram of point E in the middle.

[0026] Description of the Figures in the Specification:

[0027] 1. Tool handle; 2. Tool rod; 3. Tool head; 4. First transmission part; 5. Intermediate transmission part; 6. Second transmission part; 7. Spiral groove; 8. Cutting teeth; 9. Accommodating groove; 10. Intervertebral foraminal mirror; 11. Vibration mechanism; 12. Adapter sleeve; 13. Foraminal mirror base; 14. Working sleeve; 15. Optical base; 16. Optical input end; 17. Optical output end; 18. Optical collection part; 19. First liquid inlet; 20. First liquid outlet; 21. Second liquid inlet; 22. Second liquid outlet; 23. Liquid inlet passage; 24. Liquid outlet passage; 25. Step shaft; 26. Penetration cavity; 27. Through cavity; 28. Assembly part. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] Reference Figure 1 to Figure 4 As shown, the ultrasonic bone grinding knife of the present invention comprises a handle 1, a knife rod 2 and a knife head 3 which are arranged in sequence. The knife rod 2 comprises a first transmission part 4, an intermediate transmission part 5 and a second transmission part 6 which are arranged in sequence. The intermediate transmission part 5 is provided with a spiral groove 7, which is used to convert the axial vibration of the first transmission part 4 into a composite motion of the reciprocating linear motion of the second transmission part 6 along its axial direction and the reciprocating rotational motion around its axis. The handle 1 is arranged on the first transmission part 4, and the knife head 3 is arranged on the second transmission part 6.

[0031] The ultrasonic bone grinding knife of the present application converts the axial vibration of the knife rod 2 into a composite motion of reciprocating linear motion along the axial direction of the knife rod 2 and reciprocating rotational motion around the axis of the knife rod 2, so as to avoid the occurrence of the phenomenon of the grinding drill being entangled in the human soft tissue, reduce the probability of medical accidents, and improve the safety of bone grinding surgery. Specifically, Figure 1 As shown, the ultrasonic bone grinding knife of the present application includes a blade head 3, a blade handle 1 and a blade rod 2. The blade rod 2 is located between the blade head 3 and the blade handle 1. The blade head 3 is used to cut bone tissue, and the blade handle 1 is used to achieve a transmission connection between the ultrasonic bone grinding knife and the vibration mechanism 11. Further, the blade rod 2 includes a first transmission part 4, an intermediate transmission part 5 and a second transmission part 6. The first transmission part 4 is used to connect with the vibration mechanism 11, the intermediate transmission part 5 realizes the switching between the first transmission part 4 and the second transmission part 6, and the second transmission part 6 is used to realize the switching between the blade head 3 and the intermediate transmission part 5. Furthermore, as Figure 3As shown, the intermediate transmission part 5 of the present application is provided with a spiral groove 7, and the spiral groove 7 includes a plurality of sub-spiral grooves 7, and the plurality of sub-spiral grooves 7 are spirally arranged around the axis of the intermediate transmission part 5, and a spiral wall is formed between two adjacent sub-spiral grooves 7. When the vibration of the vibration mechanism 11 is transmitted to the first transmission part 4 through the tool handle 1, the first transmission part 4 has a reciprocating linear motion along its axial direction, and the first transmission part 4 transmits its reciprocating linear motion to the intermediate transmission part 5. Under the action of the spiral wall, the vibration of the intermediate transmission part 5 along its axial direction is converted into a composite motion of reciprocating linear motion along its axial direction and reciprocating rotational motion around its axis. Since the second transmission part 6 is connected to the intermediate transmission part 5, the movement of the second transmission part 6 includes reciprocating linear motion along its axial direction and reciprocating rotational motion around its axis. Among them, the reciprocating rotational motion around its axis on the second transmission part 6 is a reciprocating rotational motion with a preset angle, and the preset angle of the reciprocating rotational motion is small, and the preset angle is related to the spiral angle of the spiral groove 7 and the amplitude of the vibration mechanism 11. Furthermore, the second transmission part 6 transmits the composite motion to the cutter head 3, thereby realizing the composite motion of the cutter head 3, and then realizing the bone grinding action through the cutter head 3. The reciprocating linear motion along the axis of the intermediate transmission part 5 of the present application is the main cutting motion of bone grinding, and the reciprocating rotational motion with a preset angle around the axis of the intermediate transmission part 5 is the auxiliary motion of bone grinding. Under the composite motion of the main cutting motion and the auxiliary motion, the high-speed rotational motion of the prior art is replaced. In addition, the reciprocating rotational motion around the axis of the cutter head 3 can reduce the resistance to bone grinding and improve the efficiency of bone grinding.

[0032] The intermediate transmission part 5 of the ultrasonic bone grinding knife of the present application is provided with a spiral groove 7. Under the action of the spiral groove 7, the intermediate transmission part 5 converts the vibration of the vibration mechanism 11 into a composite motion of the reciprocating linear motion of the second transmission part 6 along its axial direction and the reciprocating rotation around the axis of the intermediate transmission part 5. The composite motion is transmitted to the cutter head 3 through the second transmission part 6. The cutter head 3 can not only realize the bone grinding action through the reciprocating linear motion along its axis, but also realize the bone grinding action through the reciprocating rotation motion around its axis. It can completely replace the high-speed rotation bone grinding of the grinding drill in the prior art, achieve the bone grinding effect of the high-speed grinding drill, and avoid the occurrence of the phenomenon of the grinding drill entangled with the human soft tissue in the prior art, reduce the probability of medical accidents, and improve the safety of bone grinding surgery.

[0033] In one embodiment, a plurality of spiral grooves 7 are provided, and the plurality of spiral grooves 7 are arranged axially on the intermediate transmission part 5 , and the spiral directions of the plurality of spiral grooves 7 are consistent.

[0034] like Figure 1As shown, a plurality of spiral grooves 7 are provided on the intermediate transmission part 5 of the present application, and these spiral grooves 7 can be arranged axially on the intermediate transmission part 5, which is equivalent to connecting a plurality of spiral grooves 7 in series. The rotation angle of the reciprocating rotational motion of the intermediate transmission part 5 around its axis can be amplified by the spiral grooves 7 connected in series, that is, the preset angle. The specific number of spiral grooves 7, the spiral angle of the spiral grooves 7 and the amplitude of the vibration mechanism 11 are designed according to actual needs to determine a suitable preset angle.

[0035] In one embodiment, the cutter head 3 is provided with cutting teeth 8 , the direction in which the cutter rod 2 points toward the cutter head 3 is a first direction, and the cutting teeth 8 extend from the end of the cutter head 3 along the first direction.

[0036] like Figure 2 As shown, the blade head 3 of the present application is provided with cutting teeth 8, and bone tissue is cut by the cutting teeth 8. Further, the direction in which the blade rod 2 points to the blade head 3 is defined as a first direction, and the extending direction of the cutting teeth 8 is along the first direction. Therefore, the cutting teeth 8 are not provided on the cylindrical side of the blade head 3, which can avoid the occurrence of the cutting teeth 8 on the cylindrical side entanglement with human soft tissue, further improving the safety of the operation.

[0037] In one embodiment, a plurality of cutting teeth 8 are provided, and the plurality of cutting teeth 8 are arranged in a ring shape. The direction in which the cutter head 3 points to the cutter rod 2 is the second direction. An accommodating groove 9 is provided at the axis of the cutting teeth 8 arranged in a ring shape, and the accommodating groove 9 extends from the center of the cutting teeth 8 along the second direction.

[0038] The opposite direction of the first direction is defined as the second direction, that is, the direction from the cutter head 3 to the cutter bar 2 is defined as the second direction. Figure 2 As shown, the cutting teeth 8 of the present application include a plurality of cutting teeth 8, which are arranged in a ring shape around the axis of the cutter head 3. The cutting efficiency can be improved by cutting bone tissue with the cutting teeth 8 arranged in a ring shape. The middle of the cutting teeth 8 arranged in a ring shape is a cavity, and the cavity extends from the cutting teeth 8 along the second direction to form a receiving groove 9, such as Figure 8 As shown, the bone chips generated during the bone grinding process are accommodated by the accommodating groove 9 to facilitate the removal of the chips during the bone grinding process.

[0039] In one embodiment, the radially inward direction of the cutter head 3 is the third direction, and the cutting teeth 8 extend from the end of the cutter head 3 along the superimposed direction of the first direction and the third direction.

[0040] The direction from the shank 2 to the cutter head 3 is the first direction D2, the radially inward direction of the shank 2 is the third direction D1, and the superimposed direction D1 of the first direction and the third direction is as shown in FIG. Figure 4As shown, the extending direction of the cutting teeth 8 is along the superposition direction D, that is, not only are the cutting teeth 8 not arranged on the cylindrical side of the blade head 3, but the cutting teeth 8 are also arranged to have an inclination angle radially inward, so as to further avoid the occurrence of the cutting teeth 8 being entangled with the soft tissue of the human body, thereby improving the safety of the operation.

[0041] In one embodiment, a mounting portion is provided on the knife handle 1 , and the mounting portion is at a preset distance from the end of the knife handle 1 .

[0042] like Figure 1 As shown, the handle 1 is provided with an assembly portion 28, which is a flat-mouth structure. When the ultrasonic bone grinder needs to be connected to the vibration mechanism 11, the torque wrench is clamped on the flat-mouth structure to facilitate the threaded connection of the handle 1 with the output shaft of the ultrasonic bone grinder. Further, the assembly portion 28 has a preset distance from the end of the handle 1 to reserve a corresponding operating space for the wrench, which facilitates the cooperation between the wrench and the flat mouth.

[0043] In one embodiment, a stepped shaft 25 is provided between the tool handle 1 and the tool rod 2, and the stepped shaft 25 is used to amplify the amplitude of the vibration of the tool rod 2 along its axial direction.

[0044] like Figure 1 As shown, a stepped shaft 25 is provided between the tool handle 1 and the tool rod 2. The vibration on the output shaft of the vibration mechanism 11 is transmitted to the tool handle 1, and the vibration on the tool handle 1 is transmitted to the tool rod 2. Due to the presence of the stepped shaft 25, the vibration on the tool handle 1 will be correspondingly amplified along the axial direction of the tool rod 2 due to the reduction of the cross-sectional area of ​​the tool rod 2 after passing through the stepped shaft 25, so as to improve the bone grinding efficiency.

[0045] Embodiment 2

[0046] Provided is an ultrasonic bone grinding device, which includes a percutaneous foraminal endoscope 10, a vibration mechanism 11 and an ultrasonic bone grinding knife. The handle 1 of the ultrasonic bone grinding knife is connected to the output shaft of the vibration mechanism 11, and the percutaneous foraminal endoscope 10 is slidably mounted on the ultrasonic bone grinding knife.

[0047] The present application also proposes an ultrasonic bone grinding device including the ultrasonic bone grinding knife. The ultrasonic bone grinding device including the ultrasonic bone grinding knife can effectively avoid the occurrence of the cutting teeth 8 being entangled with human soft tissue, thereby improving the safety of surgery. Specifically, Figure 5 and Figure 7As shown, the ultrasonic bone grinding device includes an ultrasonic bone grinding knife, a percutaneous endoscopic lens 10 and a vibration mechanism 11. The vibration mechanism 11 is used to provide a bone grinding power source for the ultrasonic bone grinding knife, and the output shaft of the vibration mechanism 11 is drivingly connected to the handle 1 of the ultrasonic bone grinding knife. Specifically, the output shaft of the vibration mechanism 11 is threadedly connected to the handle 1 of the ultrasonic bone grinding knife, so that the vibration mechanism 11 can transmit the vibration generated by it to the ultrasonic bone grinding knife, and then grind the bone tissue through the ultrasonic bone grinding knife. Furthermore, the intervertebral foraminal mirror 10 can be slidably mounted on the ultrasonic bone grinder. When the vibration mechanism 11 is working, the ultrasonic bone grinder can perform reciprocating linear motion along its axial direction in the intervertebral foraminal mirror 10, so that the reciprocating linear motion of the intermediate transmission part 5 along its axial direction can be converted into a composite motion of the reciprocating linear motion of the second transmission part 6 along its axial direction and the reciprocating rotational motion of the second transmission part 6 around its axis through the spiral groove 7 on the intermediate transmission part 5 of the ultrasonic bone grinder. The composite motion is transmitted to the cutter head 3 through the second transmission part 6. The cutter head 3 can not only realize the bone grinding action through the reciprocating linear motion along its axis, but also realize the bone grinding action through the reciprocating rotational motion around its axis, which can completely replace the high-speed rotation bone grinding of the grinding drill in the prior art, thereby avoiding the occurrence of the grinding drill entangled with the human soft tissue in the prior art, reducing the probability of medical accidents and improving the safety of surgery.

[0048] In one embodiment, it also includes an adapter sleeve 12, one end of which is in contact with or separated from the intervertebral foraminal mirror 10, and the other end of the adapter sleeve 12 is connected to the vibration mechanism 11, and the handle 1 of the ultrasonic bone grinder and the output shaft of the vibration mechanism 11 are transmission-connected in the adapter sleeve 12.

[0049] The ultrasonic bone grinding device of the present application further includes an adapter sleeve 12. Specifically, Figure 5 and Figure 7As shown, the adapter sleeve 12 is arranged between the intervertebral foraminal endoscope 10 and the vibration mechanism 11, that is, one end of the adapter sleeve 12 is in contact with or separated from the intervertebral foraminal endoscope 10, and the other end of the adapter sleeve 12 is connected to the vibration mechanism 11. Furthermore, when the user rotates or moves the vibration mechanism 11, the vibration mechanism 11 can drive the ultrasonic bone grinder to rotate or move axially in the intervertebral foraminal endoscope 10. During this process, the end of the adapter sleeve 12 away from the vibration mechanism 11 is in contact with or separated from the top surface of the intervertebral foraminal endoscope 10. Furthermore, since power transmission needs to be achieved between the vibration mechanism 11 and the ultrasonic bone grinder, a through cavity 27 is provided in the adapter sleeve 12, and the handle 1 of the ultrasonic bone grinder and the output shaft of the vibration mechanism 11 are located in the through cavity 27, and the handle 1 of the ultrasonic bone grinder and the output shaft of the vibration mechanism 11 are connected in a transmission manner (threaded connection) in the through cavity 27, so as to transmit the vibration of the vibration mechanism 11 to the shank 2 of the ultrasonic bone grinder through the handle 1, thereby achieving the reciprocating linear motion of the first transmission part 4 on the shank 2 along its axial direction. Among them, the adapter sleeve 12 can protect the connection between the handle 1 of the ultrasonic bone grinder and the output shaft of the vibration mechanism 11 inside it.

[0050] In one embodiment, the intervertebral foraminal endoscope 10 includes an endoscope base 13, on which a working sleeve 14 is provided. The blade rod 2 of the ultrasonic bone grinder can be slidably inserted into the endoscope base 13 and the working sleeve 14, and the blade head 3 of the ultrasonic bone grinder extends to the outside of the working sleeve 14.

[0051] The present application realizes the sliding support of the ultrasonic bone grinding knife through the intervertebral foraminal mirror base 13 of the intervertebral foraminal mirror 10. Specifically, Figure 7 As shown, the intervertebral foraminal endoscope 10 includes an endoscope base 13, an adapter sleeve 12 is arranged between the vibration mechanism 11 and the endoscope base 13 of the intervertebral foraminal endoscope 10, a working sleeve 14 is arranged on the end of the endoscope base 13 away from the adapter sleeve 12, and a through cavity 26 is arranged in the endoscope base 13 and the working sleeve 14. Fig. 9 As shown, the ultrasonic bone grinder can be slidably inserted into the through-hole 26 of the aperture mirror base 13 and the working sleeve 14. Further, the blade rod 2 of the ultrasonic bone grinder can be slidably inserted into the through-hole 26 of the aperture mirror base 13 and the working sleeve 14, so that the blade rod 2 of the ultrasonic bone grinder can be driven by the vibration mechanism 11 to slide in the intervertebral foraminal mirror 10. In addition, the blade head 3 of the ultrasonic bone grinder extends outside the working sleeve 14, so that the blade head 3 can grind the bone tissue.

[0052] In one embodiment, an optical base 15 is provided on the aperture mirror base 13, an optical input end 16 and an optical output end 17 are provided on the optical base 15, an optical collection part 18 is provided on one end of the working sleeve 14 close to the cutter head 3, and the optical input end 16 and the optical output end 17 are both connected to the optical collection part 18.

[0053] The intervertebral foraminal endoscope 10 of the present application collects images of the bone grinding position of the head of the blade 3 through the optical collection unit 18. Specifically, Figure 7 As shown, an optical base 15 is provided on the foraminal mirror base 13 of the intervertebral foraminal mirror 10, and an optical collecting part 18 is provided at the end of the working sleeve 14, that is, the end of the working sleeve 14 close to the cutter head 3. The optical collecting part 18 includes an image collecting unit and a lighting unit. The image collecting unit is used to collect the image at the cutter head 3, and the lighting unit is used to illuminate the cutter head 3; an optical input end 16 is provided on the optical base 15, and the optical input end 16 is connected to the optical collecting part 18, so as to transmit the light source to the lighting unit, and illuminate the light through the lighting unit, and then collect the image at the position of the cutter head 3 through the image collecting unit; an optical output end 17 is also provided on the optical base 15, and the optical output end 17 is connected to the optical collecting part 18, so as to transmit the image at the position of the cutter head 3 collected by the image collecting unit to the optical output end 17, and then transmit the image to the display system through the optical output end 17, and the image at the position of the cutter head 3 is displayed in real time through the display system, which is convenient for doctors to perform surgery.

[0054] In one embodiment, a first liquid inlet 19 and a first liquid outlet 20 are provided on the aperture mirror base 13, a second liquid inlet 21 and a second liquid outlet 22 are provided at the end of the working sleeve 14, a liquid inlet passage 23 and a liquid outlet passage 24 are provided in the working sleeve 14, the first liquid inlet 19 is connected to the second liquid outlet 22 through the liquid inlet passage 23, and the first liquid outlet 20 is connected to the second liquid inlet 21 through the liquid outlet passage 24.

[0055] The ultrasonic bone grinding device of the present application realizes cooling of the cutter head 3 during the bone grinding process through the liquid inlet passage 23 and the liquid outlet passage 24 on the intervertebral foraminal mirror 10. Specifically, Figure 5 and Figure 6As shown, a first liquid inlet 19 is provided on the aperture mirror base 13, a liquid inlet passage 23 is provided on the working sleeve 14, and a second liquid outlet 22 is provided at the end of the working sleeve 14. One end of the liquid inlet passage 23 is connected to the first liquid inlet 19, and the other end of the liquid inlet passage 23 is connected to the second liquid outlet 22. The coolant enters the liquid inlet passage 23 through the first liquid inlet 19 under positive pressure drive, and then flows to the position of the cutter head 3 through the second liquid outlet 22 to cool the cutter head 3. Furthermore, a second liquid inlet 21 is provided at the end of the working sleeve 14, a liquid outlet passage 24 is provided on the working sleeve 14, a first liquid outlet 20 is provided on the aperture mirror base 13, one end of the liquid outlet passage 24 is connected to the second liquid inlet 21, and the other end of the liquid outlet passage 24 is connected to the first liquid outlet 20. The coolant enters the liquid outlet passage 24 through the second liquid inlet 21 under negative pressure drive, and then flows out through the first liquid outlet 20, so as to discharge the coolant after heat exchange. The coolant is preferably physiological saline.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An ultrasonic bone grinder, characterized in that: The invention comprises a tool handle (1), a tool rod (2) and a tool head (3) which are arranged in sequence, wherein the tool rod (2) comprises a first transmission part (4), an intermediate transmission part (5) and a second transmission part (6) which are arranged in sequence, wherein the intermediate transmission part (5) is provided with a spiral groove (7), and the spiral groove (7) is used to convert the axial vibration of the first transmission part (4) into a composite motion of the second transmission part (6) along its axial direction and reciprocating rotational motion around its axis, wherein the tool handle (1) is arranged on the first transmission part (4), and the tool head (3) is arranged on the second transmission part (6).

2. The ultrasonic bone grinder according to claim 1, characterized in that: A plurality of the spiral grooves (7) are provided, and the plurality of the spiral grooves (7) are arranged along the axial direction on the intermediate transmission part (5), and the spiral directions of the plurality of the spiral grooves (7) are consistent.

3. The ultrasonic bone grinder according to claim 1, characterized in that: The cutter head (3) is provided with cutting teeth (8), the direction in which the cutter rod (2) points towards the cutter head (3) is a first direction, and the cutting teeth (8) extend from the end of the cutter head (3) along the first direction.

4. The ultrasonic bone grinder according to claim 3, characterized in that: A plurality of cutting teeth (8) are provided, and the plurality of cutting teeth (8) are arranged in a ring shape. The direction in which the cutter head (3) points to the cutter rod (2) is a second direction. An accommodating groove (9) is provided at the axis of the cutting teeth (8) arranged in a ring shape, and the accommodating groove (9) extends from the center of the cutting teeth (8) along the second direction.

5. The ultrasonic bone grinder according to claim 3, characterized in that: The radially inward direction of the cutter head (3) is a third direction, and the cutting teeth (8) extend from the end of the cutter head (3) along the superimposed direction of the first direction and the third direction.

6. An ultrasonic bone grinding device, characterized in that: The invention comprises a percutaneous foraminal mirror (10), a vibration mechanism (11) and an ultrasonic bone grinder as claimed in any one of claims 1 to 5, wherein the handle (1) of the ultrasonic bone grinder is connected to the output shaft of the vibration mechanism (11), and the percutaneous foraminal mirror (10) is slidably mounted on the ultrasonic bone grinder.

7. The ultrasonic bone grinding device according to claim 6, characterized in that: It also comprises an adapter sleeve (12), one end of which is in contact with or separated from the intervertebral foraminal mirror (10), and the other end of which is connected to the vibration mechanism (11); the handle (1) of the ultrasonic bone grinding knife and the output shaft of the vibration mechanism (11) are transmission-connected in the adapter sleeve (12).

8. The ultrasonic bone grinding device according to claim 6, characterized in that: The intervertebral foraminal endoscope (10) comprises an endoscope base (13) and a working sleeve (14), wherein the working sleeve (14) is arranged on the endoscope base (13), the blade rod (2) of the ultrasonic bone grinder can be slidably inserted into the endoscope base (13) and the working sleeve (14), and the blade head (3) of the ultrasonic bone grinder extends to the outside of the working sleeve (14).

9. The ultrasonic bone grinding device according to claim 8, characterized in that: An optical base (15) is arranged on the aperture mirror base (13), and an optical input end (16) and an optical output end (17) are arranged on the optical base (15); an optical collection portion (18) is arranged on one end of the working sleeve (14) close to the cutter head (3), and both the optical input end (16) and the optical output end (17) are connected to the optical collection portion (18).

10. The ultrasonic bone grinding device according to claim 8, characterized in that: The aperture mirror base (13) is provided with a first liquid inlet (19) and a first liquid outlet (20); the end of the working sleeve (14) is provided with a second liquid inlet (21) and a second liquid outlet (22); a liquid inlet passage (23) and a liquid outlet passage (24) are provided in the working sleeve (14); the first liquid inlet (19) is connected to the second liquid outlet (22) through the liquid inlet passage (23); and the first liquid outlet (20) is connected to the second liquid inlet (21) through the liquid outlet passage (24).

Images