AU2019100929A4 - Ultrasonic scalpel bit - Google Patents

Abstract

An ultrasonic scalpel bit is disclosed comprising a bit tip (1), a bit bar (2) and a bit body (3), with one end of the bit bar (2) being connected to the bit tip (1), and the other end of the bit bar (2) being connected to the bit body (3). A main body of the bit tip (1) is of a cylindrical structure, a front end of which is tapered. A single or a plurality of spiral bit blades (11) are spirally arranged along the bit tip (1) from the foremost end of the bit tip (1) to form a cutting portion. A cutting blade (12) of the spiral bit blade (11) is of a square or sharp blade structure. The spiral design of the bit tip (1) may assist a surgeon to gradually drill a hole inwardly in a spiral manner in surgery where it is necessary to use an ultrasonic scalpel to drill the hole. This way the drilling operation will be more controllable, thereby improving the safety of the surgery, and reducing the operation intensity of the surgeon. Fig. 2 for publication Fig. 1 31, Fig. 2

Description

ULTRASONIC SCALPEL BIT

FIELD

The present disclosure relates to the technical field of medical instruments, and particularly to an ultrasonic scalpel bit.

DEFINITION

In the present description and claims, the term “comprising” shall be understood to have a broad meaning similar to the term “including” and will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. This definition also applies to variations on the term “comprising” such as “comprise” and “comprises”.

BACKGROUND

In modern society, with the development of medical technologies, orthopedic surgery shows a tendency of diversification. Accordingly, when performing surgery, it is necessary to use different types of scalpel bits for different orthopedic conditions to perform cutting, grinding, scraping, clamping and other operations on an affected area. In surgery, ultrasonic scalpels are typically used to drill soft tissues, hard tissues, and tissues like human tissues. At present, the ultrasonic scalpel bits for drilling holes in the surgery are mostly needle-shaped bits and umbrella-shaped bits. An umbrella-shaped bit is as shown in Fig. 1. These bits can drill the tissues only by means of straight piercing, which requires a great downward pressure during use, has a low efficiency and is difficult to control, and can easily damage the body and cause medical accidents.

The reference to prior art in the background above is not and should not be taken as an acknowledgment or any form of suggestion that the referenced prior art forms part of the common general knowledge in Australia or in any other country.

2019100929 19 Aug 2019

SUMMARY OF THE DISCLOSURE

The present disclosure provides an ultrasonic scalpel bit with a spiral bit blade and chip removal holes, which can help a surgeon to complete a desired drilling operation quickly, safely and in a labor-saving manner.

In order to at least ameliorate to some extent the technical problem mentioned above, the present disclosure proposes an ultrasonic scalpel bit, which comprises a bit tip, a bit bar and a bit body, one end of the bit bar being connected to the bit tip, and the other end of the bit bar being connected to the bit body, wherein a main body of the bit tip is of a cylindrical structure, a front end 10 of which is tapered; and a single or a plurality of spiral bit blades are spirally arranged along the bit tip from the foremost end of the bit tip to form a cutting portion.

In the ultrasonic scalpel bit of the present disclosure, preferably, a conical pointed end is located at the front end of the cylindrical structure, and a cone 15 base of the conical pointed end has a diameter that is larger than the diameter of the cylindrical structure; and the single or the plurality of spiral bit blades are spirally arranged along the conical pointed end from the foremost end of the conical pointed end to form the cutting portion.

In the ultrasonic scalpel bit of the present disclosure, preferably, the 20 cylindrical structure is connected to the conical pointed end through a bevel or a circular arc-shaped face with a smooth transition.

In the ultrasonic scalpel bit of the present disclosure, preferably, a cutting blade of the spiral bit blade is of a square or sharp blade structure.

In the ultrasonic scalpel bit of the present disclosure, preferably, the cutting 25 portion of the bit tip is machined to have a plurality of chip removal holes or grooves evenly distributed in a circumferential direction of the cutting portion.

In the ultrasonic scalpel bit of the present disclosure, preferably, axial centerlines of the chip removal holes or grooves are parallel to an axial centerline of the bit tip.

In the ultrasonic scalpel bit of the present disclosure, preferably, the bit bar is of a hollow structure, the hollow part extends up to the front end of the bit tip, and a water injection hole is provided in a side face of the cylindrical structure of the bit tip or in a side face or the foremost end of the cutting portion.

2019100929 19 Aug 2019

In the ultrasonic scalpel bit of the present disclosure, preferably, the bit bar is connected to the bit tip and the bit body respectively through a bevel or a circular arc-shaped face with a smooth transition.

In the ultrasonic scalpel bit of the present disclosure, preferably, the other end of the bit body is connected to a specific ultrasonic host via an ultrasonic transducer, and the other end of the bit body is provided with connection threads, which are internal or external connection threads.

In the ultrasonic scalpel bit of the present disclosure, preferably, the bit body is further provided with a clamping face.

The ultrasonic scalpel bit has the following beneficial effects:

(1) The ultrasonic scalpel bit of the present disclosure can concentrate all the energy generated by the ultrasonic transducer on the front end portion of the bit, so that the end portion of the bit has the highest energy output, achieving the strongest working effect.

(2) The spiral design of the bit tip of the ultrasonic scalpel bit of the present disclosure can help a surgeon to gradually drill a hole inwardly in a spiral manner in surgery where it is necessary to use an ultrasonic scalpel to drill the hole, so that the drilling operation is more controllable, thereby improving the safety of the surgery, and reducing the operation intensity of the surgeon.

(3) In the ultrasonic scalpel bit of the present disclosure, the spiral design of the bit tip can achieve the advantages of quick screwing and increased holding force. When an implant needs to be removed from a bone, it can be directly removed by the ultrasonic scalpel without using other tools.

(4) The ultrasonic scalpel bit of the present disclosure is additionally provided with chip removal grooves or holes, which allows chips to be discharged from the chip removal grooves or holes during drilling, thereby reducing the resistance to the bit during drilling.

(5) The ultrasonic scalpel bit of the present disclosure is of a hollow structure, and the bit tip is provided with a water injection hole, which can ensure that a perfusate flows out of the bit tip, and facilitates the cooling of a spiral contact face when the bone is cut by the spiral bit blade. In this way, the risk of the surgery is further reduced, and the safety and success rate of surgery are improved.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural view of an umbrella-shaped ultrasonic scalpel bit for drilling a hole in the prior art;

Fig. 2 is a schematic perspective view of an ultrasonic scalpel bit of a first embodiment of the present disclosure;

Fig. 3 is a front view of a bit tip of the ultrasonic scalpel bit of the first embodiment of the present disclosure;

Fig. 4 is a schematic perspective view of an ultrasonic scalpel bit of a second embodiment of the present disclosure;

Fig. 5 is a front view of the ultrasonic scalpel bit of the second embodiment of the present disclosure;

Fig. 6 is a right view of a bit tip of the ultrasonic scalpel bit in Fig. 5;

Fig. 7 is a front view of a bit tip of an ultrasonic scalpel bit of a third embodiment of the present disclosure;

Fig. 8 is a right view of the bit tip of the ultrasonic scalpel bit in Fig. 7;

Fig. 9 is a front view of a bit tip provided with chip removal holes of an ultrasonic scalpel bit of a fourth embodiment of the present disclosure; and

Fig. 10 is a right view of the bit tip in Fig. 9.

In the figures:

- Bit tip; 11 - Spiral bit blade; 12 - Cutting edge; 13 - Chip removal hole or groove; 14 - Water injection hole; 2 - Bit bar; 3 - Bit body; 31 - Connection thread; 32 - Clamping face.

DETAILED DESCRIPTION OF EMBODIMENTS

The technical solution of the present disclosure will be described below in conjunction with the accompanying drawings, and obviously, the described embodiments are part of, not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without any creative effort shall fall within the scope of protection of the present disclosure.

In the description of the present disclosure, it should be noted that the orientation or position relations indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical” “horizontal”, “inner”, “outer”, etc. are based on the orientation or position relation shown in the accompanying drawings and are intended to facilitate the description of the present disclosure and simplify the description only, rather than indicating or implying that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and will not to be interpreted as limiting the present disclosure. In addition, the terms “first”, “second” and “third” are for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that the terms “mounting”, “connecting” and “connection” should be understood in a broad sense, unless otherwise explicitly specified or defined, for example, it may be a fixed connection, a detachable connection or an integrated connection; may be a mechanical connection or an electrical connection; and may be a direct connection or an indirect connection through an intermediate medium, or may be a communication between the interior of two elements. For those of ordinary skill in the art, the specific meaning of the terms mentioned above in the present disclosure should be construed according to specific circumstances.

The disclosure is further described in detail below by particular embodiments and with reference to the accompanying drawings.

Figs. 2 and 3 show an ultrasonic scalpel bit of a first embodiment of the present disclosure. Fig. 2 is a schematic perspective view of the ultrasonic scalpel bit of the embodiment of the present disclosure, and Fig. 3 is a front view of a bit tip in Fig. 2. As shown in Figs. 2 and 3, the ultrasonic scalpel bit of the present disclosure comprises a bit tip 1, a bit bar 2, and a bit body 3. One end of the bit bar 2 is connected to the bit tip 1, and the other end of the bit bar 2 is connected to the bit body 3. The bit body 3 is connected to a specific ultrasonic host via an ultrasonic transducer.

A main body of the bit tip 1 is of a cylindrical structure, the front end of which is tapered. A single or a plurality of spiral bit blades 11 are spirally arranged along the bit tip 1 from the foremost end (pointed end) of the bit tip 1, so as to form a spiral cutting portion. A cutting blade 12 of the spiral bit blade 11 is of a square or sharp blade structure. In the first embodiment of the present disclosure, the bit tip 1 is provided with a single spiral bit blade 11. After the bit tip is screwed in a

2019100929 19 Aug 2019 single direction such that it is pricked into an operation position, the spiral bit blade can be used to hold an operated tissue or the like to complete the subsequent operation, such as pulling. When the spiral bit blade needs to be removed, it can be removed by spirally rotating same in the reverse direction.

The bit bar 2 is of a hollow structure, and the hollow part extends up to the front end of the bit tip 1. A small hole is provided, as a water injection hole 14, in a side face of the cylindrical structure of the bit tip 1 or in a side face of the cutting portion, which facilitates the cooling of a spiral contact face when the bone is cut by the spiral bit blade. The hollow part may also extend directly to the foremost 10 end of the bit tip 1, and the water injection hole 14 is formed in the foremost end of the bit tip 1, as shown in Fig. 3.

One end of the bit bar 2 is connected to the bit tip 1, and the other end of the bit bar 2 is connected to the bit body 3. The bit bar 2 is connected to the bit tip 1 through a bevel or a circular arc-shaped face with a smooth transition, and the bit 15 bar 2 is connected to the bit body 3 also through a bevel or a circular arc-shaped face with a smooth transition. The bit body 3 is further provided, at the end thereof connected to the bit bar 2, with a clamping face 33, and the other end of the bit body 3 is further provided with connection threads, which are internal or external connection threads. In this embodiment, the connection threads are external 20 connection threads. In operation, the connection threads of the bit body 3 can be connected to a specific ultrasonic transducer and are tightened using a corresponding wrench, and the ultrasonic transducer is then connected to a specific ultrasonic host, so that the ultrasonic scalpel bit is ready for operation.

Figs. 4 to 6 show an ultrasonic scalpel bit of a second embodiment of the 25 present disclosure. Fig. 4 is a schematic perspective view of the ultrasonic scalpel bit of the second embodiment of the present disclosure, Fig. 5 is a front view of a bit tip in Fig. 4, and Fig. 6 is a right view of the bit tip of the ultrasonic scalpel bit in Fig. 5. As shown in Figs. 4 and 5, the main body of the bit tip 1 is of a cylindrical structure, the front end of which is a conical pointed end, and the cylindrical 30 structure is connected to a cone base of the conical pointed end through a bevel or a circular arc-shaped face with a smooth transition, the cone base of the conical pointed end has a diameter that is larger than the diameter of the cylindrical structure. A single or a plurality of spiral bit blades 11 are spirally

2019100929 19 Aug 2019 arranged along the conical pointed end of the bit tip 1 from the foremost end of the bit tip 1 to form a cutting portion. In this embodiment, two spiral bit blades 11 are provided. The bit bar 2 is of a hollow structure extending up to the front end of the bit tip 1. A small hole is provided, as a water injection hole 14, in a side face of the cylindrical structure of the bit tip 1 or in a side face of the cutting portion. In this embodiment, a water injection hole 14 is provided in a side face of the cylindrical structure of the bit tip 1.

In this embodiment, a conical pointed end is provided, which increases the length and sharpness of the cutting portion, and two spiral bit blades 11 are 10 provided, such a structure can achieve the advantages of quick screwing and increased holding force. When an implant needs to be removed from a bone, it can be directly removed by the ultrasonic scalpel without using other tools.

Figs. 7 and 8 show an ultrasonic scalpel bit of a third embodiment of the present disclosure, a bit tip of which is provided with chip removal holes. Fig. 7 is 15 a front view of the bit tip provided with chip removal holes of the ultrasonic scalpel bit of the third embodiment of the present disclosure, and Fig. 8 is a right view of the bit tip of the ultrasonic scalpel bit in Fig. 7. As shown in Figs. 7 and 8, the ultrasonic scalpel bit of the third embodiment of the present disclosure is similar to the ultrasonic scalpel bits of the first and second embodiments of the present 20 disclosure. The main body of the bit tip 1 is of a cylindrical structure, the front end of which is a conical pointed end, and the cylindrical structure is connected to a cone base of the conical pointed end through a bevel or a circular arc-shaped face with a smooth transition, and the cone base of the conical pointed end has a diameter that is larger than the diameter of the cylindrical structure. A single or 25 a plurality of spiral bit blades 11 are spirally arranged along the conical pointed end of the bit tip 1 from the foremost end of the bit tip 1 to form a cutting portion. Compared with the first and second embodiments of the present disclosure, the ultrasonic scalpel bit of the third embodiment of the present disclosure is different in that the cutting portion of the bit tip 1 is formed with a plurality of through holes 30 as chip removal holes 13. The plurality of chip removal holes 13 are evenly and circumferentially distributed around an axial centerline of the cutting portion, and axial centerlines of the chip removal holes 13 are parallel to an axial centerline of the bit tip 1.

2019100929 19 Aug 2019

Figs. 9 and 10 show an ultrasonic scalpel bit of a fourth embodiment of the present disclosure. Fig. 9 is a front view of the ultrasonic scalpel bit of the fourth embodiment of the present disclosure, a bit tip of which is provided with chip removal holes, and Fig. 10 is a right view of the bit tip of the ultrasonic scalpel bit 5 in Fig. 9. As shown in Figs. 9 and 10, the ultrasonic scalpel bit of the fourth embodiment of the present disclosure is similar to the ultrasonic scalpel bits of the first and second embodiments of the present disclosure. The main body of the bit tip 1 is of a cylindrical structure, the front end of which is a conical pointed end, and the cylindrical structure is connected to a cone base of the conical 10 pointed end through a bevel or a circular arc-shaped face with a smooth transition, and the cone base of the conical pointed end has a diameter that is larger than the diameter of the cylindrical structure. A single or a plurality of spiral bit blades 11 are spirally arranged along the conical pointed end of the bit tip 1 from the foremost end of the bit tip 1 to form a cutting portion. Compared with the first and 15 second embodiments of the present disclosure, the ultrasonic scalpel bit of the fourth embodiment of the present disclosure is different in that the cutting portion of the bit tip 1 is formed with a plurality of chip removal grooves 13. The plurality ofchip removal grooves 13 are evenly and circumferentially distributed along the outer periphery of the cutting portion, and axial centerlines of the chip removal 20 grooves 13 are parallel to the axial centerline of the bit tip 1. Of course, the axial centerlines of the chip removal grooves 13 and the axial centerline of the bit tip 1 may not be completely parallel but have a certain included angle, and the technical effect of the present disclosure can also be achieved.

In addition, in the ultrasonic scalpel bits involved in the present disclosure, 25 drilling is the main function for the spiral ultrasonic scalpel bits, but the ultrasonic scalpel bits also have the functions of outer scraping and cutting. That is to say, the outer scraping operation is performed by the outwardly-facing reverse blade of the spiral rear portion. In particular, in the third and fourth embodiments of the present disclosure, the outer scraping operation can be realized by means of the 30 rear end of a disk.

The ultrasonic scalpel bit of the present disclosure can concentrate all the energy generated by the ultrasonic transducer on the front end portion of the bit, so that the front end portion of the bit of the tool has the highest energy output,

2019100929 19 Aug 2019 achieving the strongest working effect. In addition, the spiral design of the bit tip can help a surgeon to gradually drill a hole inwardly in a spiral manner in surgery where it is necessary to use an ultrasonic scalpel to drill the hole, so that the drilling operation is more controllable, thereby improving the safety of the surgery, 5 and reducing the operation intensity of the surgeon. In the ultrasonic scalpel bit of the present disclosure, the spiral design of the bit tip can also achieve the advantages of quick screwing and increased holding force. When an implant needs to be removed from a bone, it can be directly removed by the ultrasonic scalpel without using other tools.

In addition, chip removal grooves or holes are additionally provided in the present disclosure, which allows chips to be discharged from the chip removal grooves or holes during drilling, thereby reducing the resistance to the bit during drilling. Moreover, the ultrasonic scalpel bit is of a hollow structure, and the bit tip is provided with a water injection hole, which can ensure that a perfusate flows 15 out of the bit tip, and facilitates the cooling of a spiral contact face when the bone is cut by the spiral bit blade. In this way, the risk of the surgery is further reduced, and the safety and success rate of surgery are improved.

The above various embodiments are merely used for illustrating rather than limiting the technical solutions of the present disclosure. Although the present 20 disclosure has been described in detail with reference to the above various embodiments, those of ordinary skill in the art should understood that the technical solutions specified in the above various embodiments can still be modified, or some or all of the technical features therein can be equivalently substituted; and such modifications or substitutions do not make the essence of 25 the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the present disclosure.

Claims (8)

1. An ultrasonic scalpel bit comprising, a bit tip, a bit bar and a bit body, one end of the bit bar being connected to the bit tip, and the other end of the bit bar being connected to the bit body, wherein a main body of the bit tip is of a cylindrical structure, a front end of which is tapered; and a single or a plurality of spiral bit blades are spirally arranged along the bit tip from the foremost end of the bit tip to form a cutting portion.

2. The ultrasonic scalpel bit according to claim 1, wherein a conical pointed end is located at the front end of the cylindrical structure, a cone base of the conical pointed end having a diameter that is larger than the diameter of the cylindrical structure.

3. The ultrasonic scalpel bit according to claim 2, wherein the cylindrical structure is connected to the conical pointed end through a bevel or a circular arc-shaped face with a smooth transition.

4. The ultrasonic scalpel bit according to any one of claims 1, 2 or 3, wherein a cutting blade of the spiral bit blade is of a square or sharp blade structure.

5. The ultrasonic scalpel bit according to any one of claims 1, 2 or 3, wherein the cutting portion of the bit tip is formed with a plurality of chip removal holes or grooves evenly distributed in a circumferential direction of the cutting portion.

6. The ultrasonic scalpel bit according to claim 5, wherein axial centerlines of the chip removal holes or grooves are substantially parallel to an axial centerline of the bit tip.

7. The ultrasonic scalpel bit according to any one of claims 1, 2, 3 or 6, wherein

2019100929 19 Aug 2019 the bit bar is of a hollow structure, which extends up to the front end of the bit tip, and a water injection hole is provided in a side face of the cylindrical structure of the bit tip or in a side face or the foremost end of the cutting portion.

5 8. The ultrasonic scalpel bit according to any one of claims 1, 2, 3 or 6, wherein the bit bar is connected to the bit tip and the bit body respectively through a bevel or a circular arc-shaped face with a smooth transition.

10 9. The ultrasonic scalpel bit according to any one of claims 1, 2, 3 or 6, wherein the other end of the bit body is connected to a specific ultrasonic host via an ultrasonic transducer, the other end of the bit body being provided with connection threads, which are internal or external connection threads.

10. The ultrasonic scalpel bit according to any one of claims 1, 2, 3 or 6, wherein the bit body is further provided with a clamping face.