Ring bone drill

Abstract

The present invention discloses a ring-shaped bone drill comprising: a cylindrical drill rod and a ring drill rod, wherein one end of the ring drill rod is welded on a ring surface near one end of the cylindrical drill rod, the center line of the cylindrical drill rod and the center line of the ring drill rod are on the same straight line, a plurality of second cutting knives are arranged on the end surface of one end of the cylindrical drill rod, a slag removal groove is arranged on the outer circumference of the ring drill rod, the slag removal groove is a through groove leading to the inner diameter of the ring drill rod and the other end of the ring drill rod, one end of the slag removal groove in the length direction starts from the outer circumference of the ring drill rod between one end of the ring drill rod and one end of the cylindrical drill rod, and the other end passes through the ring end surface of the other end of the ring drill rod, the circumference of the slag removal groove occupies 1 / 5 to 1 / 4 of the entire circumference of the ring drill rod, a plurality of first cutting knives are arranged on the end surface of the other end of the ring drill rod, the wall thickness d of the ring drill rod is 1 / 7 to 1 / 6 of the diameter of the ring drill rod, and the present invention can drill out a required cylinder on the removed bone at one time.

Description

Technical Field

[0001] The invention relates to a bone drill, in particular to a ring-shaped bone drill used for human surgery. Technical Background

[0002] The existing bone drill is a thin-walled countersink drill, and the drill bit is a thin-walled circular ring drill. During the operation, the patient's bone is first taken out of the body, and the above-mentioned bone drill is used to drill out a cylindrical shape. Although the existing drill bit can trim the outer shape of the taken out bone into a cylindrical shape, the outer cylinder of the bone after trimming often has bone forks, etc., and further trimming is required; and because the end face of the taken out bone is usually an arc shape, after the shape of the taken out bone is trimmed, its end face needs to be trimmed; and most operations are basically completed under an arthroscopy or a similar surgical mirror. During the operation, the doctor can only see the image received by the display screen, and the doctor cannot accurately estimate the depth of the bone drill. Summary of the invention

[0003] The invention of the present application aims to solve the problems existing in the existing bone drills and to provide a ring-shaped bone drill.

[0004] In order to achieve the invention purpose of this application, this application adopts the following technical solutions:

[0005] The present invention discloses a ring-shaped bone drill, which comprises: a cylindrical drill rod and a circular drill rod, wherein: one end of the circular drill rod is welded on a circular surface close to one end of the cylindrical drill rod, the center line of the cylindrical drill rod and the center line of the circular drill rod are on the same straight line, a plurality of second cutting knives are arranged on the end surface of one end of the cylindrical drill rod, a slag removal groove is opened on the outer circumference of the circular drill rod, the slag removal groove is a through groove leading to the inner diameter of the circular drill rod and the other end of the circular drill rod, one end of the slag removal groove in the length direction starts from the outer circumference of the circular drill rod between one end of the circular drill rod and one end of the cylindrical drill rod, and the other end passes through the circular end surface of the other end of the circular drill rod, the circumference of the slag removal groove occupies 1 / 5 to 1 / 4 of the entire circumference of the circular drill rod, a plurality of first cutting knives are arranged on the end surface of the other end of the circular drill rod, and the wall thickness d of the circular drill rod is 1 / 7 to 1 / 6 of the diameter of the circular drill rod.

[0006] The present invention provides a ring-shaped bone drill, wherein: an observation hole is opened on the outer circumference of the ring drill rod corresponding to the circumferential direction of the slag discharge groove, the observation hole is a through hole leading to the inner diameter of the ring drill rod, one end of the observation hole in the length direction starts from the outer circumference of the ring drill rod between one end of the ring drill rod and one end of the cylindrical drill rod, and the other end is close to the end face of the other end of the ring drill rod. The circumference of the observation hole is 1 / 4 to 1 / 3 of the circumference of the slag discharge groove.

[0007] The present invention provides a ring-shaped bone drill, wherein: the axial length of the observation hole in the circular ring drill rod is smaller than the axial length of the slag discharge groove in the circular ring drill rod.

[0008] The present invention provides a ring-shaped bone drill, wherein: the observation hole and the slag discharge groove are both parallel to the center line of the circular ring drill rod.

[0009] A ring-shaped bone drill of the present invention, wherein: six evenly distributed second cutting knives are provided on the end surface of one end of the cylindrical drill rod;

[0010] The present invention provides a ring-shaped bone drill, wherein: there are at least five evenly distributed first cutting knives on the end surface of the other end of the circular ring drill rod.

[0011] The present invention provides a ring-shaped bone drill, wherein: the outer circumference of the other end of the cylindrical drill rod is provided with three tightening surfaces evenly distributed along its circumferential direction; the three claws of the motor clamp the three tightening surfaces to drive the cylindrical drill rod and the ring drill rod to rotate.

[0012] The invention discloses a ring-shaped bone drill, wherein: a guide wire hole is opened at the center of the cylindrical drill rod.

[0013] The present invention provides a ring-shaped bone drill, wherein: the ring-shaped bone drill is made of 465 material specified by ASTM F899 standard.

[0014] Compared with the existing bone drills, the ring-shaped bone drill of the present invention has the following advantages:

[0015] 1. The ring-shaped bone drill of the present invention is composed of a second cutting blade and a first cutting blade. When a doctor performs an orthopedic operation, he can drill out a required cylinder on the removed bone at one time;

[0016] 2. The ring-shaped bone drill of the present invention has a slag discharge groove, and the bone slag cut by the ring-shaped bone drill of the present invention can be discharged from the slag discharge groove. During the bone drilling process, the doctor no longer needs to perform reverse drilling, and the bone slag can be discharged;

[0017] 3. The ring-shaped bone drill of the present invention is designed with an observation hole, so that during the operation, the doctor can timely understand the cutting depth of the ring-shaped bone drill of the present invention on the display screen.

[0018] 4. In the ring-shaped bone drill of the present invention, the wall thickness d of the ring drill rod is 1 / 7 to 1 / 6 of the diameter of the ring drill rod, which is much larger than the thickness of the existing thin-walled countersink drill. In this way, the outer surface of the bone cylinder cut off is smoother and has no bone forks. In addition, the strength, wear resistance and service life of the ring-shaped bone drill are also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic front cross-sectional view of the ring-shaped bone drill of the present invention;

[0020] Pictured Figure 1 Schematic diagram of the top view;

[0021] Figure 3 for Figure 1 A-direction schematic diagram in FIG.

[0022] Figure 4 It is a comparative schematic diagram of taking out a bone from a human body and drilling the bone with the ring-shaped bone drill of the present invention.

[0023] exist Figures 1 to 3 Among them, number 1 is a cylindrical drill rod; number 2 is a slag discharge groove; number 3 is a second cutting tool; number 4 is an annular drill rod; number 5 is a first cutting tool; number 6 is an observation hole; number 7 is a guide wire hole; number 8 is a tightening surface. DETAILED DESCRIPTION

[0024] like Figures 1 to 3 As shown, the annular bone drill of the present invention comprises: a cylindrical drill rod 1 and an annular drill rod 4, one end of the annular drill rod 4 is welded on the annular surface near one end of the cylindrical drill rod 1, the center line of the cylindrical drill rod 1 and the center line of the annular drill rod 4 are on the same straight line, six evenly distributed second cutting knives 3 are arranged on the end surface of one end of the cylindrical drill rod 1, a slag discharge groove 2 is opened on the outer circumference of the annular drill rod 4, and the slag discharge groove 2 is parallel to the center line of the annular drill rod 4, which is a channel leading to the annular drill rod. The inner diameter of the rod 4 and the through groove at the other end of the circular drill rod 4, one end of which in the length direction starts from the outer circumference of the circular drill rod 4 between one end of the circular drill rod 4 and one end of the cylindrical drill rod 1, and the other end passes through the circular end face of the other end of the circular drill rod 4. The circumference of the slag discharge groove occupies 1 / 4 of the entire circumference of the circular drill rod 4. There are at least five evenly distributed first cutting knives 5 on the end face of the other end of the circular drill rod 4. The wall thickness d of the circular drill rod 4 is 1 / 7 to 1 / 6 of the diameter of the circular drill rod 4.

[0025] An observation hole 6 is opened on the outer circumference of the circular drill rod 4 corresponding to the circumferential direction of the slag discharge groove. The observation hole 6 is parallel to the center line of the circular drill rod 4. It is a through hole leading to the inner diameter of the circular drill rod 4. One end of it in the length direction starts from the outer circumference of the circular drill rod 4 between one end of the circular drill rod 4 and one end of the cylindrical drill rod 1, and the other end is close to the end face of the other end of the circular drill rod 4. The axial length of the observation hole 6 on the circular drill rod 4 is smaller than the axial length of the slag discharge groove on the circular drill rod 4, and the circumference of the observation hole 6 is 1 / 3 of the circumference of the slag discharge groove.

[0026] The second cutting blade 3 on the end surface of one end of the cylindrical drill rod 1 extends from the slag discharge groove 2 and one end of the observation hole 6.

[0027] There are three tightening surfaces 8 evenly distributed along the circumference of the other end of the cylindrical drill rod 1. The three claws of the motor clamp the three tightening surfaces 8 to drive the cylindrical drill rod 1 and the circular drill rod 4 to rotate. A guide wire hole 11 is opened in the center of the cylindrical drill rod 1. The circular bone drill is made of 465 material specified in ASTM F899 standard.

[0028] During the operation, the patient's bones are first taken out of the body, and then the ring-shaped bone drill of the present invention is used to Figure 4 The left bone shown is drilled Figure 4 As shown in the right bone, since the annular bone drill of the present invention is composed of the first cutting blade 5 and the second cutting blade 3, the doctor can drill the required cylinder on the removed bone at one time; the outer cylindrical surface and the end surface of the bone do not need to be trimmed again. In addition, during the doctor's drilling process, the slag discharge port 2 discharges the bone slag in the inner diameter of the annular drill rod 4. The doctor can observe the inner diameter of the annular drill rod 4 in time through the observation hole 6 under the operating mirror and accurately estimate the depth of the cut.

[0029] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. A ring-shaped bone drill, comprising: The cylindrical drill rod (1) and the annular drill rod (4) are characterized in that: one end of the annular drill rod (4) is welded on the annular surface near one end of the cylindrical drill rod (1); the center line of the cylindrical drill rod (1) and the center line of the annular drill rod (4) are on the same straight line; a plurality of second cutting knives (3) are provided on the end surface of one end of the cylindrical drill rod (1); a slag removal groove (2) is provided on the outer circumference of the annular drill rod (4); the slag removal groove (2) is a through groove leading to the inner diameter of the annular drill rod (4) and the other end of the annular drill rod (4); One end of the circular drill rod (4) in the length direction starts from the outer circumference of the circular drill rod (4) between one end of the circular drill rod (4) and one end of the cylindrical drill rod (1), and the other end passes through the circular end face of the other end of the circular drill rod (4). The circumference of the slag discharge groove (2) occupies 1 / 5 to 1 / 4 of the entire circumference of the circular drill rod (4). There are a plurality of first cutting knives (5) on the end face of the other end of the circular drill rod (4). The wall thickness d of the circular drill rod (4) is 1 / 7 to 1 / 6 of the diameter of the circular drill rod (4). The annular bone drill is made of 465 material specified in ASTM F899 standard.

2. The ring-shaped bone drill according to claim 1, characterized in that: An observation hole (6) is provided on the outer circumference of the circular drill rod (4) corresponding to the circumferential direction of the slag discharge groove (2). The observation hole (6) is a through hole leading to the inner diameter of the circular drill rod (4). One end of the observation hole (6) in the length direction starts from the outer circumference of the circular drill rod (4) between one end of the circular drill rod (4) and one end of the cylindrical drill rod (1), and the other end is close to the end surface of the other end of the circular drill rod (4). The circumference of the observation hole (6) is 1 / 4 to 1 / 3 of the circumference of the slag discharge groove (2).

3. The ring-shaped bone drill according to claim 2, characterized in that: The axial length of the observation hole (6) on the circular drill rod (4) is smaller than the axial length of the slag discharge groove (2) on the circular drill rod (4).

4. The ring-shaped bone drill according to claim 3, characterized in that: The observation hole (6) and the slag discharge groove (2) are both parallel to the center line of the circular drill rod (4).

5. The ring-shaped bone drill according to claim 4, characterized in that: Six evenly distributed second cutting knives (3) are arranged on the end surface of one end of the cylindrical drill rod (1).

6. The ring-shaped bone drill according to claim 5, characterized in that: At least five evenly distributed first cutting knives (5) are arranged on the end surface of the other end of the circular drill rod (4).

7. The ring-shaped bone drill according to claim 6, characterized in that: On the outer circumference of the other end of the cylindrical drill rod (1) there are three clamping surfaces (8) evenly distributed along the circumferential direction thereof, and the three claws of the motor clamp the three clamping surfaces (8) to drive the cylindrical drill rod (1) and the annular drill rod (4) to rotate.

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