Slotting abrasive drill and surgical knife

Abstract

The utility model relates to the field of medical equipment, and discloses a slotting abrasive drill and a surgical knife, the slotting abrasive drill comprises a knife head assembly and a front outer tube; the tool bit assembly comprises a grinding head and a grinding handle, and the grinding head is arranged at one end of the grinding handle; a connecting pipe is arranged at one end of the front outer pipe, at least part of the structure of the grinding handle is rotatably installed in the connecting pipe, a flat structure extending in the axial direction is arranged on the outer side wall of the connecting pipe, and the outer diameter of at least part of the structure of the end, close to the grinding head, of the connecting pipe is smaller than the diameter of the grinding head. The flat structure is arranged on the connecting pipe of the front outer pipe, and the outer diameter of the connecting pipe is designed to be small, so that when the abrasive drill is used for slotting the bone tissue of a patient, the front outer pipe does not interfere with a titanium plate implanted into the bone tissue of the patient and does not interfere with a notch of the bone tissue of the patient, the slotting operation can be normally implemented, and the working efficiency of the abrasive drill is improved. And the operation quality and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, and relates to a kind of slotting drill and surgical cutter. BACKGROUND

[0002] The grinding head is one of the common surgical cutters in orthopedic surgery. During the operation, the doctor can grind the bone tissue of the patient through the grinding head. The existing surgical grinding head, such as the eccentric reciprocating drill for surgery disclosed in application No. 201820834086.1, includes a grinding drill device and a reciprocating device. The grinding drill device includes a grinding head and a support rod. The grinding head is arranged in the support rod through a grinding handle. The reciprocating device is used to drive the grinding head to rotate.

[0003] However, in some specific orthopedic surgeries, the implantation of titanium plates is often involved. For example, in spinal surgery, the stability of the bone tissue can be enhanced by implanting a titanium plate. Figure 1 As shown in the figure, since the front rod part of the existing grinding handle is relatively thick, the front rod part of the handle is prone to interfere with the implanted titanium plate when the grinding head is fed. In addition, when a deeper slot needs to be opened, since the diameter of the cutting head of the grinding head is smaller than the diameter of the front rod part of the handle, the front rod part of the handle interferes with the slot of the patient's bone tissue, causing the slotting to fail. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a slotting drill and surgical cutter to solve the problem that the front rod part of the existing grinding handle is relatively thick, causing the handle to interfere with the titanium plate and / or slot when the grinding head is fed.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In a first aspect, the present application provides a slotting drill, which comprises:

[0007] A cutting head assembly, which comprises a grinding head and a grinding handle, and the grinding head is arranged at one end of the grinding handle; and

[0008] A front outer tube, one end of which is provided with a connecting tube, at least part of the structure of the grinding handle is rotatably mounted in the connecting tube, the outer side wall of the connecting tube is provided with a flat structure extending in the axial direction, and the outer diameter of at least part of the structure of the connecting tube close to the grinding head is smaller than the diameter of the grinding head.

[0009] In a possible implementation, a water injection passage is arranged in the front outer tube, a water outlet is formed in the connecting tube and communicates with the water injection passage, the water outlet is arranged at a position of the connecting tube which is not flat, and a water inlet is formed in the front outer tube and communicates with the water passage.

[0010] In a possible implementation, the front outer tube is provided with a flow guide groove extending in the axial direction, the flow guide groove is arranged at a position where the connecting tube is not flat, one end of the flow guide groove is connected with the water outlet, and the other end faces the grinding head.

[0011] In a possible implementation, the slotted grinding drill further comprises a transmission shaft, the transmission shaft is rotatably installed in the front outer tube, and one end of the transmission shaft is in transmission connection with the end of the grinding handle away from the grinding head.

[0012] In a possible implementation, the slotted grinding drill further comprises a first support sleeve, the first support sleeve is installed in the front outer tube, and the transmission shaft penetrates through the first support sleeve.

[0013] In a possible implementation, the outer side wall of the first support sleeve is provided with an injection level, the injection level extends in the axial direction of the first support sleeve, and the injection level and part of the inner wall of the front outer tube enclose an injection passage.

[0014] In a possible implementation, the outer diameter of the connecting tube gradually decreases from the end close to the front outer tube to the end close to the grinding head.

[0015] In a possible implementation, the slotted grinding drill further comprises a second support sleeve, at least part of the structure of the second support sleeve is installed in the connecting tube, and the grinding handle penetrates through the second support sleeve.

[0016] In a possible implementation, the slotted grinding drill further comprises a rear shell, the front outer tube is installed on the rear shell, and a transmission mechanism for driving the transmission shaft to rotate is installed in the rear shell.

[0017] Second aspect. The application provides a surgical cutter, comprising a handle and the slotted grinding drill according to any one of the first aspect, and the slotted grinding drill is detachably installed on the handle.

[0018] The application has the following beneficial effects:

[0019] 1. According to the application, the flat structure is arranged on the connecting tube of the front outer tube, and the outer diameter of the connecting tube is designed to be small, so that when the grinding drill is used to groove the bone tissue of a patient, the front outer tube does not interfere with the titanium plate implanted in the bone tissue of the patient, and does not interfere with the slot of the bone tissue of the patient, so that the grooving operation can be normally implemented, and the quality and efficiency of the operation are improved.

[0020] 2. According to the technical scheme of the application, the slotted grinding drill can provide cooling water for the implementation of the operation, so as to effectively cool the grinding head and the bone tissue polished by the patient, and improve the quality and efficiency of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0022] Figure 1 is a schematic view of the present application for showing background art;

[0023] Figure 2 is a structural schematic view of a slotted abrasive drill in the embodiments of the present application;

[0024] Figure 3 is a partial sectional view of a slotted abrasive drill in the embodiments of the present application;

[0025] Figure 4 is an enlarged schematic view of A in the embodiments of the present application; Figure 2

[0026] Explanation of reference numerals: 100, tool head assembly; 110, abrasive head; 120, abrasive handle; 200, front outer tube; 210, connecting tube; 220, flat structure; 230, water injection passage; 240, water outlet; 250, water inlet; 260, flow guide groove; 300, transmission shaft; 400, first support sleeve; 500, second support sleeve; 600, rear housing. DETAILED DESCRIPTION

[0027] The advantages and effects of the present application can be understood by those skilled in the art from the content disclosed in the present specification. It should be noted that the drawings provided in the following embodiments are only used for exemplary illustration, and the representation is only a schematic view, not a physical drawing, and should not be understood as a limitation on the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] ​In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] like Figures 2-4 As shown in the figure, this application provides a grooving drill, which includes a cutting head assembly 100 and a front outer tube 200. The cutting head assembly 100 includes a grinding head 110 and a grinding shank 120. The grinding shank 120 has a rod-shaped structure, and the grinding head 110 has a spherical structure. The surface of the grinding head 110 has grinding grooves, and the grinding head 110 is fixed to one end of the grinding shank 120. A connecting tube 210 is integrally formed at one end of the front outer tube 200, and at least a portion of the structure of the grinding shank 120 is rotatably mounted within the connecting tube 210. Flat structures 220 extending axially are provided on both sides of the outer wall of the connecting tube 210, and the outer diameter of at least a portion of the structure of the connecting tube 210 near the end of the grinding head 110 is smaller than the diameter of the grinding head 110.

[0031] By using the above technical solution, a flat structure 220 is provided on the connecting tube 210 of the anterior outer tube 200, and the outer diameter of the connecting tube 210 is designed to be small, so that when the drill is slotting the patient's bone tissue, the anterior outer tube 200 will not interfere with the titanium plate implanted in the patient's bone tissue, nor with the slot of the patient's bone tissue, so that the slotting operation can be carried out normally, improving the quality and efficiency of the surgery.

[0032] In one possible embodiment, the outer diameter of the connecting tube 210 gradually decreases from the end near the front outer tube 200 to the end near the grinding head 110. This arrangement minimizes the outer diameter of the front end of the connecting tube 210, preventing interference between the connecting tube 210 and the titanium plate and / or the groove, while still ensuring a good connection to the front outer tube 200 and providing stable support for the cutting head assembly 100.

[0033] In a possible embodiment, the front outer tube 200 is provided with a water injection channel 230, the connecting tube 210 is provided with a water outlet 240 which is in communication with the water injection channel 230, the water outlet 240 is arranged on the connecting tube 210 at a position where the flat structure 220 is not located, that is, the design position of the water outlet 240 does not overlap with the design position of the flat structure 220, and the front outer tube 200 is provided with a water inlet 250 which is in communication with the water injection channel. By such an arrangement, the slotted burr can provide cooling water for the implementation of the operation, so as to effectively cool the burr head 110 and the bone tissue of the patient to be polished, and improve the quality and efficiency of the operation.

[0034] In a possible embodiment, the front outer tube 200 is provided with a water injection channel 230, the connecting tube 210 is provided with a water outlet 240 which is in communication with the water injection channel 230, the water outlet 240 is arranged on the connecting tube 210 at a position where the flat structure 220 is not located, that is, the design position of the water outlet 240 does not overlap with the design position of the flat structure 220, and the front outer tube 200 is provided with a water inlet 250 which is in communication with the water injection channel. By such an arrangement, the slotted burr can provide cooling water for the implementation of the operation, so as to effectively cool the burr head 110 and the bone tissue of the patient to be polished, and improve the quality and efficiency of the operation.

[0035] In a possible embodiment, the slotted burr further comprises a transmission shaft 300, the transmission shaft 300 is rotatably installed in the front outer tube 200, and one end of the transmission shaft 300 is in transmission connection with the end of the burr handle 120 which is away from the burr head 110. Specifically, the burr handle 120 and the transmission shaft 300 can be in transmission connection through a key connection. By arranging the transmission shaft 300, the burr handle 120 can drive the burr head 110 to rotate.

[0036] In a possible embodiment, the slotted burr further comprises a first support sleeve 400, the first support sleeve 400 is fixedly installed in the front outer tube 200, and the transmission shaft 300 penetrates the first support sleeve 400. In addition, the outer diameter of the first support sleeve 400 is equal to the inner diameter of the front outer tube 200. By arranging the first support sleeve 400, the transmission shaft 300 can be supported, so that the transmission shaft 300 can rotate more stably.

[0037] In a possible embodiment, the outer side wall of the first support sleeve 400 is provided with an injection level which extends along the axial direction of the first support sleeve 400, and the injection level and part of the inner wall of the front outer tube 200 enclose the water injection channel 230. By the cooperation of the injection level and the front outer tube 200, the water injection channel 230 is formed.

[0038] In a possible embodiment, the slotted burr further comprises a second support sleeve 500, at least a part of the structure of the second support sleeve 500 is fixedly installed in the connecting pipe 210, and the grinding handle 120 penetrates through the second support sleeve 500. By arranging the second support sleeve 500, the grinding handle 120 can be supported, so that the grinding handle 120 can rotate more stably, thereby reducing the risk of shaking of the grinding head 110 when grinding the bone tissue of the patient, and improving the safety of the operation.

[0039] In a possible embodiment, the slotted burr further comprises a rear housing 600, the front outer pipe 200 is fixedly installed on the rear housing 600 away from the connecting pipe 210, and the rear housing 600 is installed with a transmission mechanism for driving the transmission shaft 300 to rotate. The transmission mechanism can be a gear transmission structure, a connecting rod transmission structure, etc., which are all embodied in the prior art, and will not be described in detail in the present embodiment. In addition, the transmission mechanism can also directly adopt a motor, and the output shaft of the motor is connected with one end of the transmission shaft 300, so as to drive the transmission shaft 300 to rotate by the motor.

[0040] Embodiment two

[0041] The present application provides a surgical cutter, which comprises a handle and a slotted burr as described in embodiment one, and the slotted burr is detachably installed on the handle. The specific structure of the slotted burr is referred to embodiment one. Since the surgical cutter adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one.

[0042] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application. The technical, shape and structure parts not described in detail in the present application are all known technologies.

Claims

1. A grooving drill, characterized in that, The grooving drill includes: A cutting head assembly (100), the cutting head assembly (100) including a grinding head (110) and a grinding shank (120), the grinding head (110) being disposed at one end of the grinding shank (120); and A front outer tube (200) is provided with a connecting tube (210) at one end. At least a portion of the structure of the grinding shank (120) is rotatably installed in the connecting tube (210). The outer side wall of the connecting tube (210) is provided with a flat structure (220) extending axially. The outer diameter of at least a portion of the structure of the connecting tube (210) near the grinding head (110) is smaller than the diameter of the grinding head (110).

2. The grooving drill according to claim 1, characterized in that, The front outer pipe (200) is provided with a water injection passage (230), and the connecting pipe (210) is provided with a water outlet (240) communicating with the water injection passage (230). The water outlet (240) is located at the position of the non-flat structure (220) on the connecting pipe (210), and the front outer pipe (200) is provided with a water inlet (250) communicating with the water passage.

3. The grooving drill according to claim 2, characterized in that, The front outer tube (200) is provided with a guide groove (260) extending along the axial direction. The guide groove (260) is located on the non-flat structure (220) of the connecting pipe (210). One end of the guide groove (260) is connected to the water outlet (240), and the other end faces the grinding head (110).

4. The grooving drill according to claim 2, characterized in that, The grooving drill also includes a drive shaft (300), which is rotatably mounted inside the front outer tube (200), and one end of the drive shaft (300) is connected to the end of the grinding shank (120) away from the grinding head (110).

5. The grooving drill according to claim 4, characterized in that, The grooving drill also includes a first support sleeve (400), which is installed inside the front outer tube (200), and the drive shaft (300) passes through the first support sleeve (400).

6. The grooving drill according to claim 5, characterized in that, The outer wall of the first support sleeve (400) is provided with a water injection surface, which extends along the axial direction of the first support sleeve (400) and forms a water injection passage (230) with part of the inner wall of the front outer tube (200).

7. The grooving drill according to any one of claims 1-6, characterized in that, The outer diameter of the connecting pipe (210) gradually decreases from the end near the front outer pipe (200) to the end near the grinding head (110).

8. The grooving drill according to any one of claims 1-6, characterized in that, The grooving drill also includes a second support sleeve (500), at least a portion of which is installed inside the connecting pipe (210), and the grinding shank (120) passes through the second support sleeve (500).

9. The grooving drill according to any one of claims 4-6, characterized in that, The slotting drill also includes a rear housing (600), the front outer tube (200) is mounted on the rear housing (600), and a transmission mechanism for driving the drive shaft (300) to rotate is installed inside the rear housing (600).

10. A surgical instrument, characterized in that, The surgical instrument includes a handle and a grooving drill as described in any one of claims 1-9, the grooving drill being detachably mounted on the handle.

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