CN213129768U

CN213129768U - Ultrasonic bone knife

Info

Publication number: CN213129768U
Application number: CN202021570925.7U
Authority: CN
Inventors: 郭毅军; 彭海波
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-05-07
Anticipated expiration: 2030-07-31

Abstract

The utility model provides an ultrasonic bone grinding knife, which comprises a knife bar and a knife head connected with the front end of the knife bar, wherein the rear end of the knife bar is provided with a connecting part for connecting a power handle, and the knife head and the knife bar are integrally formed; the tool bit includes the first grinding portion that links to each other with the cutter arbor and connects the second grinding portion at first grinding portion front end, first grinding portion is cylindrical structure or the conical structure of first grinding portion for diameter reduces gradually from the past to the back, the conical structure of second grinding portion for diameter crescent from the past to the back, all be provided with on the outer wall of first grinding portion and second grinding portion and grind the bone tooth. The utility model discloses, cutter arbor and tool bit integrated into one piece have both reduced two parts and have connected the energy loss that the face caused, have also improved machining efficiency, through conical tool bit structure, can increase the contact surface gradually when lieing in the contact of bone tissue, enlarge the grinding scope gradually, realize the gradual grinding of bone tissue, reduce the impact, avoid the damage to other bone tissues.

Description

Ultrasonic bone knife

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to supersound bone knife.

Background

The ultrasonic osteotome cutting or crushing principle is that a high-frequency electric signal is converted into high-frequency mechanical vibration under the action of an energy transducer structure in a handle, and then a cutter head impacts osseous tissues at high speed through an amplification vibration displacement structure to realize cutting or crushing of the osseous tissues; the existing cutter bar and a cutter head at the front end of the cutter bar are usually processed separately and then assembled together, and energy loss is usually caused on the connecting surface of two parts in the using process, so that the cutting efficiency of the ultrasonic bone knife is reduced. The ultrasonic cutter head basically realizes the cutting or the crushing of bones by impacting bone tissues at high speed through a cutting edge with a smaller size or other shapes; the traditional ultrasonic knife head has fewer types and can not meet the requirements of operations.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art not enough, the utility model aims at providing an ultrasonic bone grinding sword, enlarge the grinding scope gradually, realize the gradual grinding of bone tissue.

In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:

an ultrasonic bone grinding knife comprises a knife bar and a knife head connected to the front end of the knife bar, wherein the rear end of the knife bar is provided with a connecting part used for connecting a power handle, and the knife head and the knife bar are integrally formed; the tool bit includes the first grinding portion that links to each other with the cutter arbor and connects the second grinding portion at first grinding portion front end, first grinding portion is cylindrical structure or the conical structure of first grinding portion for diameter reduces gradually from the past to the back, the conical structure of second grinding portion for diameter crescent from the past to the back, all be provided with on the outer wall of first grinding portion and second grinding portion and grind the bone tooth.

Cutter arbor and tool bit integrated into one piece had both reduced the energy loss that two parts were connected the face and were caused, had also improved machining efficiency, through conical tool bit structure, can crescent contact surface when lieing in the contact of bone tissue, enlarge the grinding scope gradually, realized the gradual grinding of bone tissue, reduced the impact, avoided the damage to other bone tissues.

Optionally, the burr teeth are of a knurled structure.

Optionally, the first grinding portion is of a cylindrical configuration having a diameter greater than the diameter of the front portion of the tool holder, and the rear end of the second grinding portion has the same diameter as the first grinding portion.

Optionally, the first grinding part is a conical structure with a diameter gradually decreasing from front to back, the bone grinding teeth are rows of knurled teeth spirally distributed along the axial direction of the cutter head, and each row of knurled teeth is continuous on the outer wall of the first grinding part and the outer wall of the second grinding part.

Optionally, the front end surface of the cutter head is a plane or a convex cambered surface; the ultrasonic bone grinding knife further comprises a water injection channel which penetrates through the knife bar and the knife head along the axial direction of the knife bar, and the front end of the water injection channel penetrates out of the front end face of the knife head along the axial direction.

Optionally, the cutter bar comprises a rod part and a cutter body connected to the rear end of the rod part, and the connecting part is arranged on the cutter body; the diameter of the knife body is larger than that of the rod part, and the connecting part of the knife body and the rod part is in arc transition.

Optionally, the rod portion is of an equal-diameter structure or a reducing structure in which the diameter of the rod portion gradually increases from front to back, and the rod portion and the first grinding portion are in circular arc transition.

Optionally, a flat structure for transmitting the torsion is arranged on the knife body.

Optionally, the rear portion of the blade body is a connecting portion, and an external thread is arranged on the connecting portion.

Optionally, the tool bar further comprises a joint connected to the rear end of the tool body, the front and rear parts of the joint are provided with external threads, the front part of the joint extends into a threaded hole formed in the rear end of the tool body and is in threaded connection with the tool body, and the rear part of the joint forms the connecting part.

As mentioned above, the utility model has the advantages that: the utility model discloses, cutter arbor and tool bit integrated into one piece have both reduced two parts and have connected the energy loss that the face caused, have also improved machining efficiency, through conical tool bit structure, can increase the contact surface gradually when lieing in the contact of bone tissue, enlarge the grinding scope gradually, realize the gradual grinding of bone tissue, reduce the impact, avoid the damage to other bone tissues.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is an enlarged view of the cutter head of FIG. 1;

fig. 5 is a schematic structural diagram of another embodiment of the present invention;

FIG. 6 is a front view of FIG. 5;

fig. 7 is a cross-sectional view of fig. 6.

Part number description:

1-a cutter bar; 11-a stem portion; 12-a blade body; 13-a water injection channel; 14-flat position structure; 15-a threaded hole; 2-a cutter head; 21-a first grinding section; 22-a second grinding section; 23-grinding bone and teeth; 3-a linker; 31-central hole.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

The front and rear positions in this embodiment are such that the side facing the patient is the front and the side facing away from the patient is the rear when the osteotome is in operation.

Example 1

As shown in fig. 1 to 4, the ultrasonic osteotome in this example comprises a blade bar 1 and a blade head 2, wherein the rear end of the blade bar 1 has a connecting portion for connecting a power handle, and the blade head 2 is connected to the front end of the blade bar 1, in this example, the blade head 2 and the blade bar 1 are integrated, i.e. formed integrally, and the connecting portion between the blade bar 1 and the blade head 2 can be in smooth transition.

The tool bit 2 comprises a second grinding part 22 and a first grinding part 21 which are connected into a whole in a front-back mode, the front end face of the second grinding part 22 is the front end face of the tool bit 2, the rear end of the second grinding part 22 is connected with the front end of the first grinding part 21, and the rear end of the first grinding part 21 is connected with the tool bar 1; the diameter of the second grinding part 22 is gradually increased from the front to the back, the diameter of the first grinding part 21 is gradually decreased from the front to the back, the diameter of the back end of the second grinding part 22 is equal to that of the front end of the first grinding part 21, and bone grinding teeth 23 are arranged on the outer walls (namely the side walls) of the second grinding part 22 and the first grinding part 21. The second grinding part 22 and the first grinding part 21 are both in a conical structure, and the section of the second grinding part and the section of the first grinding part along the axial direction are in an isosceles trapezoid shape.

Cutter arbor 1 and tool bit 2 integrated into one piece had both reduced the energy loss that two part connection faces and caused, had also improved machining efficiency, through the 2 structures of tool bit of biconical, can crescent contact surface when lieing in the contact of bone tissue, enlarge the grinding scope gradually, realized the gradual grinding of bone tissue, reduce the impact, avoided the damage to other bone tissues.

In one embodiment, the grinding teeth 23 are knurled, and the knurls are distributed on the tapered surfaces of the second grinding portion 22 and the first grinding portion 21.

Specifically, the bone grinding teeth 23 are rows of knurled teeth spirally distributed along the axial direction of the cutter head 2, and each row of knurled teeth is continuous on the outer walls of the second grinding part 22 and the first grinding part 21, that is, the same row of knurled teeth on the outer walls of the second grinding part 22 and the first grinding part 21 are corresponding and continuous, as shown in fig. 4.

Wherein the taper of the second grinding part 22 and the first grinding part 21 may be the same, or the taper of the second grinding part 22 and the first grinding part 21 may be different.

In this example, the front end surface of the cutter head 2 is a plane or a convex cambered surface; for cooling or cleaning, a water injection channel 13 is axially and penetratingly arranged at the center of the cutter bar 1, and the front end of the water injection channel 13 axially penetrates out of the front end surface of the cutter head 2 along the cutter bar 1. The front end of the water injection channel 13 penetrates out of the front end of the cutter head 2 along the axial direction, so that cooling liquid can directly act on the cutter head 2, and the cooling effect is good.

The cutter bar 1 comprises a rod part 11 and a cutter body 12, the front end of the rod part 11 is connected with the cutter head 2, the rear end of the rod part 11 is connected with the cutter body 12, and the connecting part is arranged on the cutter body 12; the diameter of the blade body 12 is larger than that of the rod part 11, an amplitude amplifying structure is formed again on the basis that the amplitude of the amplitude-variable rod is amplified, and the joint A of the blade body 12 and the rod part 11 is in arc transition, so that stress concentration is avoided.

Wherein, the blade 12 is provided with a flat structure 14 for transmitting torque force, so that the tool can be clamped and screwed, and can be screwed or unscrewed when being connected with a power handle. The rod part 11 is a reducing structure with a diameter gradually increasing from front to back, and the rod part 11 and the back part of the first grinding part 21 are in circular arc transition, as shown at B in fig. 2.

In one embodiment, the rear portion of blade 12 is a coupling portion that is externally threaded to facilitate coupling to a power handle.

In another embodiment, the tool bar 1 further includes a joint 3 connected to the rear end of the tool body 12, the front and rear portions of the joint 3 are provided with external threads (i.e., stud structure), the rear end of the tool body 12 is provided with a threaded hole 15, the front portion of the joint 3 extends into the threaded hole 15 and is in threaded connection with the tool body 12, and the rear external threads of the joint 3 form the connecting portion for connecting a power handle.

Wherein, connect 3 along the axial to seted up centre bore 31, centre bore 31 and water injection channel 13 intercommunication to power handle water injection from the rear.

Example 2

As shown in fig. 5 to 7, this example is different from embodiment 1 in that the first grinding part 21 has a cylindrical structure, the length of the first grinding part 21 is longer than that of the second grinding part 22, and knurled teeth on the outer circumferential surface of the first grinding part 21 and the tapered surface of the second grinding part 22 are separately formed; the rod 11 of the tool holder 1 has a front-rear equal-diameter structure, and the rest is the same as that of embodiment 1.

Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides an supersound bone knife, includes the cutter arbor and connects the tool bit at the cutter arbor front end, the cutter arbor rear end has the connecting portion that are used for connecting power handle, its characterized in that: the cutter head and the cutter bar are integrally formed; the tool bit includes the first grinding portion that links to each other with the cutter arbor and connects the second grinding portion at first grinding portion front end, first grinding portion is cylindrical structure or for the toper structure that reduces to the back diameter in the past gradually, the toper structure that the second grinding portion is diameter crescent from the past to the back, all be provided with on the outer wall of first grinding portion and second grinding portion and grind the bone tooth.

2. The ultrasonic osteotome defined in claim 1 wherein: the bone grinding teeth are in a reticulate pattern knurling structure.

3. The ultrasonic osteotome defined in claim 1 wherein: the first grinding part is of a cylindrical structure, the diameter of the first grinding part is larger than that of the front part of the cutter rod, and the diameter of the rear end of the second grinding part is the same as that of the first grinding part.

4. The ultrasonic osteotome defined in claim 1 wherein: the first grinding part is of a conical structure with the diameter gradually reduced from front to back, the bone grinding teeth are multiple rows of knurled teeth spirally distributed along the axial direction of the cutter head, and each row of knurled teeth is continuous on the outer walls of the first grinding part and the second grinding part.

5. The ultrasonic osteotome defined in claim 1 wherein: the front end surface of the cutter head is a plane or a convex cambered surface; the ultrasonic bone grinding knife further comprises a water injection channel which penetrates through the knife bar and the knife head along the axial direction of the knife bar, and the front end of the water injection channel penetrates out of the front end face of the knife head along the axial direction.

6. The ultrasonic osteotome defined in any one of claims 1-5 wherein: the cutter bar comprises a rod part and a cutter body connected to the rear end of the rod part, and the connecting part is arranged on the cutter body; the diameter of the knife body is larger than that of the rod part, and the connecting part of the knife body and the rod part is in arc transition.

7. The ultrasonic osteotome defined in claim 6 wherein: the rod part is of an equal-diameter structure or is of a reducing structure with the diameter gradually increasing from front to back, and the rod part and the first grinding part are in circular arc transition.

8. The ultrasonic osteotome defined in claim 6 wherein: the knife body is provided with a flat position structure for transmitting torsion.

9. The ultrasonic osteotome defined in claim 6 wherein: the rear portion of the knife body is a connecting portion, and external threads are arranged on the connecting portion.

10. The ultrasonic osteotome defined in claim 6 wherein: the cutter bar further comprises a connector connected to the rear end of the cutter body, external threads are arranged on the front portion and the rear portion of the connector, the front portion of the connector extends into a threaded hole formed in the rear end of the cutter body and is in threaded connection with the cutter body, and the rear portion of the connector forms the connecting portion.