Tapered tubular otologic burr

Abstract

The present utility model relates to the technical field of medical instruments. Disclosed is a tapered tubular otologic burr, aiming to solve the technical problem of limitation of surgical visual fields caused by the same diameter of the proximal end and the distal end of a cutter rod in the same step section in existing otologic burrs. The tapered tubular otologic burr comprises a grinding head, a cutter rod assembly, and a cutter holder; the grinding head is connected to a connecting rod; the cutter rod assembly is arranged around the connecting rod; the cutter rod assembly comprises a connecting rod supporting member, a grinding head supporting member, an inner cutter rod, a positioning sheet, and an outer cutter rod which are sequentially arranged around the connecting rod from inside to outside; the outer cutter rod has a proximal end and a distal end which are opposite to each other; and the outer cutter rod is uniformly tapered from the proximal end to the distal end. According to the tapered tubular otologic burr provided by the present utility model, the surgical visual field can be improved, the water leakage probability of the burr is reduced, and the bounce of the cutter rod is avoided.

Description

A tapered tubular ear drill Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a tapered tubular ear drill. Background Art

[0002] During otologic surgery, a medical burr is often used to remove bone tissue from the patient's ear. For example, during otologic surgery, a power handle drives the burr to grind the relevant tissue within the ear. A typical otologic burr consists of a grinding head, a locking device, and a power handle. The locking device connects and locks the grinding head and power handle.

[0003] At present, the structure of ear drilling equipment has been basically fixed, and research and development mainly focuses on the problems encountered by doctors during actual operations, and makes targeted improvements.

[0004] For example, after it was put into actual use, some doctors reported the problem of limited surgical field of view. As shown in Figure 1, Figure 1 shows an ear drill in the prior art, whose tool rod assembly is overall in the shape of a stepped cylinder. In actual work, since the proximal and distal ends of the tool rod in the same step section have the same diameter, part of the surgical field of view is blocked by the tool rod body; on the other hand, the process steps required to obtain the tool rod assembly of this structure are relatively large, and the cost is relatively high.

[0005] Utility Model Content

[0006] The utility model aims to provide a tapered tubular otology drill to solve the technical problem of limited surgical field of view caused by the same diameter of the proximal and distal ends of the shank in the same step section in the existing otology drill.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The utility model provides a tapered tubular ear drill, comprising a grinding head, a cutter bar assembly and a cutter seat, wherein the grinding head is connected to a connecting rod, and the cutter bar assembly is arranged around the connecting rod;

[0009] The tool rod assembly includes a connecting rod support, a grinding head support, an inner tool rod, a positioning plate and an outer tool rod, which are arranged in sequence from the inside to the outside around the connecting rod. The outer tool rod has relative proximal and distal ends, and is arranged in a uniform tapered shape from the proximal end to the distal end.

[0010] The technical effect of adopting the above technical solution is: by making the outer knife rod evenly tapered from the proximal end to the distal end, compared with the setting where the proximal and distal ends of the knife rod have the same diameter, it can provide a better surgical field of view to ensure the safety of the operation; in addition, setting the number of layers of the knife rod to two layers can reduce the weld leakage caused by welding compared with the existing technology.

[0011] Optionally or preferably, a water inlet hole is provided on the outer wall of the outer cutter bar, and a fluid channel is formed between the inner cutter bar and the outer cutter bar, and the fluid channel is used to allow water from the water inlet hole to flow out from the grinding head after passing through the fluid channel.

[0012] Optionally or preferably, the positioning piece is a semi-tubular spring piece, and the positioning piece is arranged between the inner tool rod and the outer tool rod and close to the grinding head.

[0013] The technical effect of adopting the above technical solution is: by providing a positioning piece, the inner knife rod and the outer knife rod are limited, thereby avoiding the large vibration caused by the knife rod bouncing and ensuring the safety of the operation.

[0014] Optionally or preferably, the diameter of the outer knife rod at the proximal end is 3.5 mm, and the diameter of the outer knife rod at the distal end is 2.2 mm.

[0015] Based on the above technical solution, the present invention can at least produce the following technical effects:

[0016] (1) The tapered tubular ear drill provided by the present invention has an outer blade that is uniformly tapered from the proximal end to the distal end. Compared with a configuration in which the proximal and distal ends of the blade have the same diameter, the transition is smoother and a better surgical field of view is provided, thereby ensuring the safety of the operation.

[0017] (2) The number of layers of the shank is set to two from four in the prior art, which can reduce the weld leakage caused by welding;

[0018] (3) By adding a positioning plate between the inner and outer knife rods, the inner and outer knife rods can be limited, thereby avoiding large vibrations caused by the knife rods bouncing and ensuring the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a front view of a conventional otology drill bar assembly;

[0020] FIG2 is a front view of the utility model of the tapered tubular ear drill;

[0021] FIG3 is a front view of the tool bar assembly of the tapered tubular otology drill of the present invention;

[0022] FIG4 is a side view of the tool bar assembly of the tapered tubular otology drill of the present invention;

[0023] FIG5 is a front cross-sectional view of the tool bar assembly of the tapered tubular otology drill of the present invention;

[0024] FIG6 is a partial enlarged schematic diagram of portion A in FIG5 ;

[0025] FIG7 is a partial enlarged schematic diagram of portion B in FIG5 .

[0026] In the figure: 1. Grinding head; 11. Connecting rod; 2. Tool bar assembly; 21. Connecting rod support; 22. Grinding head support; 23. Inner tool bar; 24. Positioning piece; 25. Outer tool bar; 26. Fluid channel; 27. Water inlet hole; 3. Tool holder. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0028] Example

[0029] Please refer to Figures 2 and 3, which show a tapered tubular ear drill, including a grinding head 1, a cutter bar assembly 2 and a cutter seat 3; wherein the grinding head 1 is connected to a connecting rod 11, and the cutter bar assembly 2 is arranged around the connecting rod 11.

[0030] Please refer to Figures 4 to 7. In this embodiment, the tool rod assembly 2 includes a connecting rod support 21, a grinding head support 22, an inner tool rod 23, a positioning piece 24 and an outer tool rod 25, which are arranged around the connecting rod 11 from the inside to the outside; wherein the connecting rod support 21 and the grinding head support 22 are respectively used to achieve the limiting fixation and support of the connecting rod 11 and the grinding head 1.

[0031] In this embodiment, the outer knife rod 25 has relative proximal and distal ends. The proximal and distal ends refer to the end closer to the user as the proximal end and the end farther from the user as the distal end.

[0032] Furthermore, the outer knife rod 25 is configured to be uniformly tapered from its proximal end to the distal end, and the outer knife rod 25 is integrally formed and has a tapered tubular shape; being configured as the above-mentioned tapered tubular shape, the diameter of the outer knife rod 25 gradually and uniformly decreases from the proximal end to the distal end, and the transition is smooth, which can expand the user's surgical field of view.

[0033] As an optional embodiment, the diameter of the proximal end of the outer blade rod 25 is 3.5 mm, and the diameter of the distal end is 2.2 mm.

[0034] In this embodiment, a water inlet hole 27 is provided on the outer wall of the outer knife rod 25, and a fluid channel 26 is formed between the inner knife rod 23 and the outer knife rod 25. In actual work, surgical water can enter the fluid channel 26 through the water inlet hole 27 and flow out at the grinding head 1 to flush the surgical site.

[0035] A positioning piece 24 is provided between the inner tool rod 23 and the outer tool rod 25 and near the grinding head 1. The positioning piece 24 is used to limit the inner tool rod 23 and the outer tool rod 25 to avoid large vibrations caused by tool rod bouncing.

[0036] In this embodiment, the positioning piece 24 is a semi-tubular spring piece, and its cross-sectional shape is shown in FIG. 4 . It can be understood that the water from the water inlet 27 can flow out from the area of ​​the fluid channel 26 that is not blocked by the positioning piece 24 .

[0037] In actual work, the grinding head 1 and the knife rod assembly 3 are fixed in the knife seat 3. Before the operation, the knife seat 3 is connected to the power handle, and the two are locked by the locking device. The power handle provides the grinding head 1 with the power required for the operation.

[0038] Since this solution does not involve improvements to the tool holder 3, the tool holder 3 will not be described in detail. It should be understood that the grinding head 1 and tool rod assembly 2 of this solution can be used with any tool holder 3 and power handle of any known structure to achieve the grinding function.

[0039] The utility model provides a tapered tubular otology drill. Compared with the existing otology drill shown in FIG1 , the utility model has an outer blade 25 formed into an integral tapered tubular shape, so that its diameter gradually and evenly decreases from the proximal end to the distal end. As the outer blade 25 approaches the center, the light at the grinding head 1 is less blocked by the blade, thereby making the blade transition smoother and expanding the surgical field of view.

[0040] By changing the number of layers of the shank from four to two, the phenomenon of weld leakage caused by welding is reduced;

[0041] In addition, a positioning piece 24 is provided between the inner knife rod 23 and the outer knife rod 25 to limit the inner and outer knife rods, thereby avoiding large vibrations caused by the knife rods bouncing and ensuring the safety of the operation.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tapered tubular ear drill, comprising a grinding head (1), a tool rod assembly (2) and a tool holder (3), characterized in that: The grinding head (1) is connected to a connecting rod (11), and the knife bar assembly (2) is arranged around the connecting rod (11); The tool rod assembly (2) comprises a connecting rod support (21), a grinding head support (22), an inner tool rod (23), a positioning plate (24) and an outer tool rod (25) which are arranged in sequence from the inside to the outside around the connecting rod (11); the outer tool rod (25) has a proximal end and a distal end opposite to each other; and the outer tool rod (25) is arranged in a uniform tapered shape from the proximal end to the distal end.

2. The tapered tubular ear bur according to claim 1, characterized in that: The outer wall of the outer blade rod (25) is provided with a water inlet hole (27), and a fluid channel (26) is formed between the inner blade rod (23) and the outer blade rod (25). The fluid channel (26) is used to allow water from the water inlet hole (27) to flow out from the grinding head (1) through the fluid channel (26).

3. The tapered tubular ear bur according to claim 1, characterized in that: The positioning piece (24) is a semi-tubular spring piece, and the positioning piece (24) is arranged between the inner knife rod (23) and the outer knife rod (25) and close to the grinding head (1).

4. The tapered tubular ear bur according to claim 1, characterized in that: The outer knife rod (25) has a proximal end diameter of 3.5 mm and a distal end diameter of 2.2 mm.

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