A surgical drill

Abstract

The invention discloses a surgical burr, comprising a shank assembly, a shank, a locking mechanism and a power handle, wherein the power handle is aligned with the shank assembly and extends into the locking mechanism; the power handle comprises a handle shell, a handle inner shell located inside the handle shell, a connecting seat located at the front end of the handle shell and a handle tail located at the end of the handle shell, and the shank and the connecting seat are sealed and matched; a driving member is arranged in the handle inner shell, a cleaning channel is arranged in the handle inner shell and at the end of the driving member, a water inlet groove is arranged on the outer surface of the handle inner shell, a liquid supply assembly is arranged at the handle tail, and the cleaning channel is connected to the liquid supply assembly through a one-way valve. The device improves the structure of the liquid supply channel, the structure of the locking mechanism and the structure of the motor position on the power handle, and the improved burr has significantly reduced water leakage, and the connection between the burr and the power handle is more stable, thereby extending the service life of the burr.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a surgical bur. Background Art

[0002] In orthopedic surgery, bone tissue of patients is often removed by medical drills. Although the structure of the drill equipment has been basically fixed and has been in use for many years, doctors still encounter many problems that affect the operation during the actual operation, such as water leakage of the equipment, rust of the motor, and loose connection between the grinding head and the power handle. Among them, water leakage of the equipment may affect other medical devices used in the operation, rust of the motor will affect the service life of the motor, and the stable connection between the grinding head and the power handle is related to whether the target lesion can be accurately ground. Therefore, it is necessary to continuously improve the spinal drill equipment. Summary of the invention

[0003] The object of the present invention is to provide a surgical bur to solve the problems of unstable connection of components and short service life of existing surgical burs.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a surgical burr, comprising a shank assembly, a shank, a locking mechanism and a power handle, the power handle being aligned with the shank assembly and extending into the locking mechanism;

[0005] The power handle comprises a handle shell, a handle inner shell located inside the handle shell, a connecting seat located at the front end of the handle shell, and a handle tail located at the end of the handle shell, and the knife handle is sealed with the connecting seat;

[0006] A driving part is arranged in the inner shell of the handle, a cleaning channel is arranged in the inner shell of the handle and at the end of the driving part, a water inlet groove is arranged on the outer surface of the inner shell of the handle, a liquid supply assembly is arranged at the tail of the handle, the cleaning channel is connected with the liquid supply assembly through a one-way valve, a water outlet hole is arranged in the locking mechanism, and the liquid supply assembly, the water inlet groove, the connecting seat and the water outlet hole form a cooling channel for the flow of the medium.

[0007] Furthermore, the locking mechanism includes a snap-fit ​​structure and an elastic component arranged on the connecting seat, and a shell is provided at the end of the knife rod assembly. The shell is provided with a blocking portion that snaps with the snap-fit ​​structure and a spherical recessed portion that abuts against the elastic component.

[0008] Furthermore, the elastic component includes a spherical steel ball and a spring abutting against the spherical steel ball, and the spring is located inside the connecting seat.

[0009] Furthermore, a connecting shaft is provided inside the connecting seat, and the connecting shaft is connected to the tool handle in an aligned and matched manner.

[0010] Furthermore, a sealing ring is provided on the knife handle, and the knife handle and the connecting seat are sealed and connected by the sealing ring.

[0011] Furthermore, a liquid inlet hole is provided at the front end of the connecting seat, and a cleaning agent injection device can be connected to the liquid inlet hole. The one-way valve is connected to the liquid supply component. The liquid inlet hole, the cleaning channel, the one-way valve and the liquid supply component form a cleaning path for the flow of the cleaning agent, and the cleaning path is opposite to the flow direction of the cooling channel.

[0012] Furthermore, the water inlet groove has a spiral structure.

[0013] Furthermore, a cable sleeve is provided on the handle tail of the power handle.

[0014] The present invention has the following beneficial effects: the surgical bur provided by the present invention has a stable and reliable structure, good performance and long service life. The coolant flows through the provided cooling channel to cool the drive member and the grinding head respectively. At the same time, the provided cleaning channel can be used to maintain the drive member to avoid rust and extend the service life of the device. Moreover, the cleaning channel is connected to the liquid supply component through a one-way valve, and the used detergent can flow out directly through the liquid supply component. Therefore, the setting of the detergent channel will not significantly increase the volume of the handle. In addition, through the structural design of the locking mechanism, the sealing ring at the joint between the bur and the power handle will not be scratched when unlocked, and water leakage will not occur in the case of long-term use. At the same time, the locking mechanism can provide axial and circumferential locking at the same time, so that the connection between the bur and the power handle is more stable and the performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a cross-sectional view of the present invention;

[0017] Figure 3 for Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0018] Figure 4 This is a cross-sectional view of the power handle in this application;

[0019] Figure 5 It is a schematic diagram of the structure of the knife bar assembly (including part of the locking assembly) in the present invention;

[0020] Figure 6 For the present invention Figure 6 A structural diagram of the power handle (including part of the locking assembly);

[0021] Figures 1 to 6The reference numerals shown in the figures represent respectively: 1- knife bar assembly, 11- knife handle, 2- locking assembly, 21- water outlet, 22- sealing ring, 23- blocking part, 24- spherical recessed part, 3- power handle, 31- handle outer shell, 32- handle inner shell, 321- driving member, 322- one-way valve, 323- cleaning channel, 324- connecting shaft, 33- handle tail, 331- cable sleeve, 332- liquid supply device, 34- connecting seat, 341- elastic device, 342- clamping structure. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, a surgical burr includes a shank assembly 1, a shank 11, a locking mechanism 2 and a power handle 3, wherein the power handle 3 is aligned with the shank assembly 1 and extends into the locking mechanism 2. The shank assembly 1 includes a burr at the front end, through which the bone tissue at the surgical site is ground.

[0024] The power handle 3 includes a handle outer shell 31, a handle inner shell 32 located inside the handle outer shell 31, a connection seat 34 located at the front end of the handle outer shell 31, and a handle tail 33 located at the end of the handle outer shell 31. The handle 11 is sealed with the connection seat 34. Specifically, a sealing ring 22 is provided on the handle 11, and the handle 11 and the connection seat 34 are sealed and connected by the sealing ring 22. When plugging and unplugging, the sealing ring 22 and the inner wall of the connection seat 34 can be evenly stressed, so that it is not easy to deform under long-term use, and water seepage will not occur, which can significantly improve the problem of water seepage. A connecting shaft 324 is provided inside the connection seat 34, and the connecting shaft 324 is connected to the handle 11 in a aligning and matching manner.

[0025] A driving member 321 is provided in the handle inner shell 32. The driving member 321 adopts a motor. A cleaning channel 323 is provided in the handle inner shell 32 and at the end of the driving member 321. A water inlet groove is provided on the outer surface of the handle inner shell 32. The water inlet groove has a spiral structure. A liquid supply component 332 is provided at the tail 33 of the handle. The cleaning channel 323 is connected to the liquid supply component 332 through a one-way valve 322. A water outlet hole 21 is provided in the locking mechanism 2. The liquid supply component 332, the water inlet groove, the connecting seat 34 and the water outlet hole 21 form a cooling channel for the flow of the medium. During the operation, physiological saline enters the water inlet groove on the handle inner shell 32 through the liquid supply component 332, and finally flows out from the front end of the tool rod assembly 1 close to the grinding head. On the one hand, it cools down the high-speed running motor, and on the other hand, it cools down the working grinding head. The flow path of the physiological saline can be referred to. Figure 3 and Figure 4Path A. The coolant flows through the provided cooling channel to cool the driving member 321 and the grinding head respectively. Meanwhile, the driving member 321 can be maintained through the provided cleaning channel 323 to avoid rust and extend the service life of the device.

[0026] Since the power handle 3 is reusable, it is necessary to disinfect the power handle 3 after each operation. In the present application, a flow channel for a detergent is provided for disinfection and sterilization. Specifically, a liquid inlet is provided at the front end of the connecting seat 34, and a detergent injection device can be connected to the liquid inlet. The one-way valve 322 is connected toward the liquid supply component 332. The liquid inlet, the cleaning channel 323, the one-way valve 322 and the liquid supply component 332 form a cleaning path for the flow of the detergent. The cleaning path is opposite to the flow direction of the cooling channel. After each sterilization, a detergent injection device is connected from the front end of the connecting seat 34 to inject a biocompatible detergent into the motor. On the one hand, it can take away the residual water vapor from the sterilization. On the other hand, the detergent contains lubricating oil, which flows through the rotor and bearings of the motor to maintain the motor. The used detergent flows out through the cleaning channel 323, the one-way valve 322 and the liquid supply component 332. The path can be referred to. Figure 4 Path B is shown. The cleaning channel 323 is connected to the liquid supply assembly 332 through the one-way valve 322, and the used cleaning agent can flow out directly through the liquid supply assembly 332, so the setting of the cleaning agent channel will not significantly increase the volume of the handle.

[0027] like Figures 5 and 6 As shown, the locking mechanism 2 includes a clamping structure 342 and an elastic component 341 arranged on a connecting seat 34, and a housing is arranged at the end of the shank assembly 1, and a blocking portion 23 that is clamped with the clamping structure 342 and a spherical recessed portion 24 that abuts against the elastic component 341 are arranged on the housing. The elastic component 341 includes a spherical steel ball and a spring that abuts against the spherical steel ball, and the spring is located inside the connecting seat 34. When connected, the power handle 3 and the shank assembly 1 are aligned and extended into the locking mechanism. At this time, the handle 11 is aligned and connected with the connecting shaft 324, and the power handle 3 is rotated 90° clockwise or counterclockwise relative to the shank assembly 1, so that the clamping structure 342 is engaged with the blocking portion 23, and the elastic component 341 is clamped into the spherical recessed portion 24, and the spherical recessed portion 24 is pressed axially forward under the action of elasticity. The locking mechanism 2 can provide axial and circumferential locking at the same time, so that the connection between the grinding drill and the power handle 3 is more stable.

[0028] The device improves the structure of the liquid supply channel, the structure of the locking mechanism 2, and the structure of the motor position on the power handle 3. The improved auger has significantly reduced water leakage, and the connection between the auger and the power handle 3 is more stable. It is not easy to loosen even after long-term and multiple uses. After each use, a biocompatible cleaning and maintenance agent can be used to maintain the motor to prevent the motor from rusting and extend the service life of the motor.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A surgical bur, characterized in that: include: A knife bar assembly (1), a knife handle (11), a locking mechanism (2) and a power handle (3), wherein the power handle (3) is aligned with the knife bar assembly (1) and extends into the locking mechanism (2); The power handle (3) comprises a handle outer shell (31), a handle inner shell (32) located inside the handle outer shell (31), a connecting seat (34) located at the front end of the handle outer shell (31), and a handle tail (33) located at the end of the handle outer shell (31), and the knife handle (11) is sealed and matched with the connecting seat (34); A driving member (321) is arranged in the handle inner shell (32); a cleaning channel (323) is arranged in the handle inner shell (32) and at the end of the driving member (321); a water inlet groove is arranged on the outer surface of the handle inner shell (32); a liquid supply component (332) is arranged at the tail (33) of the handle; the cleaning channel (323) is communicated with the liquid supply component (332) through a one-way valve (322); a water outlet hole (21) is arranged in the locking mechanism (2); and the liquid supply component (332), the water inlet groove, the connecting seat (34) and the water outlet hole (21) form a cooling channel for the flow of the medium; The front end of the connecting seat (34) is provided with a liquid inlet hole, and a cleaning agent injection device can be connected to the liquid inlet hole. The one-way valve (322) is connected to the liquid supply component (332). The liquid inlet hole, the cleaning channel (323), the one-way valve (322) and the liquid supply component (332) form a cleaning path for the flow of the cleaning agent, and the cleaning path is opposite to the flow direction of the cooling channel.

2. The surgical burr according to claim 1, characterized in that: The locking mechanism (2) comprises an elastic component (341) and a snap-fit ​​structure (342) arranged on the connecting seat (34); a shell is arranged at the end of the knife rod component (1); and a blocking portion (23) snap-fitted with the snap-fit ​​structure (342) and a spherical recessed portion (24) abutting against the elastic component (341) are arranged on the shell.

3. The surgical burr according to claim 2, characterized in that: The elastic component (341) comprises a spherical steel ball and a spring abutting against the spherical steel ball, and the spring is located inside the connecting seat (34).

4. The surgical burr according to claim 1, characterized in that: A connecting shaft (324) is arranged inside the connecting seat (34), and the connecting shaft (324) is connected to the knife handle (11) in a matching manner.

5. The surgical burr according to claim 4, characterized in that: The knife handle (11) is provided with a sealing ring (22), and the knife handle (11) and the connecting seat (34) are sealed and connected via the sealing ring (22).

6. The surgical burr according to any one of claims 1 to 5, characterized in that: The water inlet groove has a spiral structure.

7. The surgical burr according to claim 6, characterized in that: A cable sleeve is also provided on the handle tail (33) of the power handle (3).

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