Neuroendoscope abrasive drill with water injection pipe fixing device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a neuroendoscopic abrasive drill with a water injection pipe fixing device, which comprises a handle component, an outer sleeve rod, an abrasive drill, a guide seat and a water injection joint, and the guide seat and the water injection joint are arranged at the front end of the outer sleeve rod. A fixing device is arranged on the outer sleeve rod and comprises a hoop fixedly arranged on the outer sleeve rod in a sleeving mode and a fixing assembly installed on the hoop. The fixing assembly comprises an outer shell, a fixed inner sleeve, a movable sleeve and a nut, the fixed inner sleeve is provided with a center channel for the water injection pipe to penetrate through, elastic grabbing clamps which are annularly and evenly distributed are arranged at one end of the fixed inner sleeve, the movable sleeve is slidably arranged on the fixed inner sleeve in a sleeving mode, and the nut is in threaded connection with the fixed inner sleeve. The nut is screwed to push the movable sleeve to axially move and extrude the elastic gripper, so that the elastic gripper is forced to radially contract, and the water injection pipe is firmly clamped. Adhesive tape is replaced by a mechanical buckle type structure, so that an external water injection pipe is quickly and reliably clamped and released, displacement or falling of a pipeline in an operation is avoided, and the flushing effect and the operation safety are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a neuroendoscopic drill with a water injection tube fixing device. Background Technology

[0002] Neuroendoscopic transnasal surgery is currently the mainstream minimally invasive technique for treating deep skull base lesions such as pituitary adenomas and chordomas. During the procedure, surgeons use a high-speed drill (often rotating at tens of thousands of revolutions per minute) to precisely remove bone from the skull base to expose the lesion. However, if the heat generated by high-speed grinding is not managed promptly, it can easily cause thermal damage to surrounding sensitive structures such as the optic nerve and internal carotid artery. Simultaneously, bone dust, debris, and blood seeping from the drill can diffuse within the narrow nasal working passage, severely contaminating the endoscope or obstructing the surgical field of view, interfering with the surgeon's judgment. Therefore, continuous and effective saline irrigation of the drill tip is essential during the procedure to both cool it and maintain a clear surgical field.

[0003] Currently in clinical practice, doctors typically use an external water inlet tube to provide irrigation water for the drill. Since original factory drills often lack compatible tubing fixing devices, doctors can only temporarily wrap and attach the water inlet tube to the drill's handle or outer rod using medical tape. This method has significant drawbacks: First, the humid environment of nasal surgery can easily cause the tape to lose its adhesiveness due to overflow of irrigation fluid, leading to tube instability, displacement, or detachment, making it impossible to accurately deliver the irrigation fluid to the grinding target. Second, the binding force of the tape is weak; the slender water inlet tube is prone to shaking under the vibration of the drill's high-speed operation, affecting not only the operator's feel but also potentially obstructing the endoscopic view. Although some existing patented technologies (such as Chinese patent publication number CN202322922882.4) have designed water inlet channels and connectors inside the drill, these solutions only address the internal water system structure of the drill, still lacking a matching mechanical fixing device for the external water supply line connected to the water inlet connector. In practical use, the tubing connected to the water injection connector remains suspended and unsupported, forcing doctors to use adhesive tape for additional fixation, which does not fundamentally solve the problem of reliable tubing fixation. Therefore, there is an urgent need to improve the existing technology to address the technical issues of unreliable fixation, easy loosening, and easy shaking of the external water injection tubing connected to the neuroendoscopic drill. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing neuroendoscopic drills where the external water injection tube is not securely fixed and is prone to loosening. This invention provides a neuroendoscopic drill with an integrated mechanical water injection tube fixing device to achieve rapid and stable clamping of the water injection tube, ensuring continuous and precise intraoperative irrigation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A neuroendoscopic drill with a water injection tube fixing device includes a handle assembly, a drive device disposed within the handle assembly, an outer sleeve fixedly connected to the front end of the handle assembly, and a drill coaxially passing through the outer sleeve. A guide seat is provided at the end of the outer sleeve away from the handle assembly, and a water injection connector for supplying fluid to the drill tip is provided on the guide seat. A fixing device is also provided at the end of the outer sleeve near the water injection connector, and the fixing device is used to fix an external water injection tube connected to the water injection connector.

[0007] The fixing device includes a fixing ring and a fixing component. The fixing ring is fixedly sleeved on the outer rod, and the fixing component is installed on the fixing ring.

[0008] The fixing component includes an outer shell, a fixed inner sleeve disposed within the outer shell, a movable sleeve fitted onto the fixed inner sleeve, and a nut; the outer shell is fixedly connected to the fixing ring.

[0009] The fixed inner sleeve is coaxially disposed within the outer shell and is fixedly connected to the outer shell. The fixed inner sleeve has a central channel through which the external water injection pipe passes, and one end of the fixed inner sleeve is provided with a plurality of elastic claw flaps evenly distributed in a ring. The plurality of elastic claw flaps together constitute an elastic gripper.

[0010] The movable sleeve is slidably fitted onto the fixed inner sleeve along the axial direction of the fixed inner sleeve, and the nut is threadedly connected to the fixed inner sleeve; by tightening the nut, the movable sleeve can be pushed to move axially toward the elastic gripper, so that the movable sleeve abuts against and squeezes the elastic gripper, forcing the elastic gripper to contract toward the center to clamp the external water injection pipe.

[0011] Furthermore, the fixed inner sleeve is divided into a gripping section, a smooth section, and a threaded section along the axial direction; the elastic gripper is disposed on the gripping section, the movable sleeve is sleeved on the smooth section, and the nut is threadedly connected to the threaded section.

[0012] Furthermore, the outer shell has an inner cavity for accommodating the fixed inner sleeve, and a connecting seat is provided on the smooth section of the fixed inner sleeve. The fixed inner sleeve is fixedly connected to the outer shell through the connecting seat. A slot is provided on the side wall of the movable sleeve for the connecting seat to pass through. The slot extends along the axial direction of the movable sleeve, and the width of the slot is adapted to the width of the connecting seat, so as to allow the movable sleeve to slide along the axial direction of the smooth section under the limitation of the connecting seat.

[0013] Furthermore, the fixing component also includes a return spring located inside the housing, with one end abutting against the end of the housing near the elastic gripper and the other end abutting against the end of the movable sleeve.

[0014] Furthermore, when the nut is tightened, its end abuts against the end of the movable sleeve away from the return spring, pushing the movable sleeve to slide along the smooth section and compress the return spring; when the movable sleeve moves to the outer periphery of the elastic gripper covering the gripper section, the inner wall of the movable sleeve forces the radial dimension of the elastic gripper to decrease.

[0015] Furthermore, an installation groove is provided on the outer wall of the outer sleeve rod, and the fixing ring is fixedly sleeved and snapped into the installation groove.

[0016] Furthermore, the bottom of the outer casing is provided with a threaded connecting post, and the fixing ring is provided with a mounting seat with an internal threaded hole. The threaded connecting post and the mounting seat are threadedly engaged to realize the fixed connection between the fixing component and the fixing ring.

[0017] Furthermore, the guide seat includes a guide portion and a head, the guide portion being threadedly connected and fixed to the end of the outer sleeve rod; the head is provided with a guide hole for the drill to pass through, the water injection connector is located on the side of the head, and the guide seat has an internal water injection channel connecting the water injection connector and the guide hole.

[0018] This invention discloses a neuroendoscopic drill with a water injection tube fixation device. Its core lies in the integration of a mechanical clamping mechanism consisting of a fixing ring and fixing components onto the outer sleeve. Compared to existing methods relying on adhesive tape for fixation, this invention offers significant advantages: First, the mechanical action of the movable sleeve squeezing the elastic gripper by tightening the nut generates a strong and uniform radial clamping force on the inserted water injection tube, ensuring extremely firm fixation. This effectively resists vibration and traction during surgical procedures, completely eliminating the risk of tube loosening or displacement, and ensuring a continuous, stable, and precise flow of irrigation fluid. Second, the fixation device is simple and intuitive to operate; simply tightening or loosening the nut completes the clamping and release of the water injection tube, eliminating the tedious steps of wrapping and applying adhesive tape, significantly improving the efficiency of surgical preparation and instrument conversion. Finally, the entire fixation device has a compact structure and high integration with the drill body, without increasing the operating volume, avoiding complex internal water circuit designs, reducing manufacturing costs and failure rates, and facilitating disassembly, cleaning, and sterilization, meeting the stringent hygiene requirements for medical devices. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a neuroendoscopic drill with a water injection pipe fixing device according to the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of a neuroendoscopic drill with a water injection tube fixing device according to the present invention.

[0021] Figure 3 This is a partial cross-sectional schematic diagram of the overall structure of the fixing device in this utility model.

[0022] Figure 4 This is a cross-sectional structural diagram of the fixing device in this utility model.

[0023] Figure 5 This is an exploded structural diagram of the fixing device in this utility model.

[0024] The following are the markings in the attached diagram:

[0025] 1. Handle assembly; 11. Drive unit; 2. Outer rod; 21. Mounting slot; 3. Grinding drill; 4. Guide seat; 41. Water injection connector; 42. Guide part; 43. Head; 431. Water injection channel; 5. Fixing device; 51. Fixing ring; 511. Mounting seat; 52. Outer shell; 521. Threaded connecting post; 53. Fixing inner sleeve; 531. Elastic gripper; 532. Smooth section; 533. Threaded section; 54. Movable sleeve; 541. Slotted; 55. Nut; 56. Connecting seat; 57. Return spring; 6. External water injection pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In neuroendoscopic transnasal surgery, cooling and rinsing of the drill is crucial. However, existing adhesive tape fixation methods are prone to failure in humid and high-frequency vibration environments, causing the water injection tube to fall off or shake, affecting the surgical process and safety.

[0029] Based on this, and to improve the problems in related technologies, embodiments of this application provide a neuroendoscopic drill with a water injection tube fixing device, such as... Figures 1 to 5 As shown, the drill mainly consists of a handle assembly 1, a drive unit 11, an outer rod 2, a drill bit 3, a guide seat 4, and a core fixing device 5. The drive unit 11 is located inside the handle assembly 1 and provides power; the outer rod 2 is connected to the front end of the handle, through which the drill bit 3 passes. A guide seat 4 is installed at the end of the outer rod 2, on which a water inlet connector 41 is mounted. To solve the problem of pipe fixing, a fixing device 5 is installed on the outer rod 2 to firmly clamp the external water inlet pipe 6 connected to the water inlet connector 41. This fixing device 5 includes a fixing ring 51 and a fixing assembly. The fixing ring 51 serves as a base fitted onto the outer rod 2, and the fixing assembly is mounted on the ring. The fixing assembly internally includes an outer shell 52, a fixing inner sleeve 53, a movable sleeve 54, and a nut 55. The fixing inner sleeve 53 is fixed inside the outer shell 52, allowing the water inlet pipe to pass through, and its end is equipped with an elastic gripper 531. During operation, tightening the nut 55 pushes the movable sleeve 54 to move axially and squeezes the elastic gripper 531, causing it to contract and clamp the pipeline.

[0030] This technical solution replaces traditional adhesive tape application with a mechanical clamping ring and jaws, using a threaded drive to physically lock the water injection pipe. This structure not only provides extremely high shock and tensile strength, ensuring the water injection pipe does not shift during high-speed drilling, but also ensures a clean appearance and unobstructed view through precise mechanical coordination, avoiding the bulkiness and obstruction of vision caused by wrapped adhesive tape.

[0031] Optionally, in some embodiments, the present invention has implemented a segmented optimization design for the structure of the fixed inner sleeve 53, such as... Figures 3 to 5 As shown, the fixed inner sleeve 53 is divided into a gripping section, a smooth section 532, and a threaded section 533 along the axial direction. The elastic gripping section 531 is located at the foremost end and consists of several slit elastic metal or engineering plastic sheets; the smooth section 532 is located in the middle and has a smooth surface, providing sliding guidance for the movable sleeve 54; the threaded section 533 is located at the end and is used to mate with the nut 55. This segmented design clearly defines the functional areas of each part, making manufacturing and processing more standardized. As an alternative embodiment, those skilled in the art can also design the fixed inner sleeve as a one-piece structure, as long as it meets the requirements of deformable clamping at the front end and threaded drive at the rear end. However, the segmented design has advantages in terms of ease of assembly and maintenance.

[0032] Optionally, in some embodiments, to prevent unnecessary circumferential rotation of the movable sleeve 54 during movement, such as... Figures 3 to 5As shown, the outer shell 52 has an inner cavity to accommodate the fixed inner sleeve 53. A connecting seat 56 is provided on the smooth section 532 of the fixed inner sleeve 53, through which the fixed inner sleeve 53 is relatively fixed to the outer shell 52. Correspondingly, a long, narrow slot 541 is formed on the side wall of the movable sleeve 54. The slot 541 extends axially, and its width precisely matches the width of the connecting seat 56 (i.e., clearance fit). This design uses the connecting seat 56 as a "guide pin" to restrict the rotational freedom of the movable sleeve 54, allowing it to move only in a pure linear motion along the smooth section 532. This not only ensures that the squeezing of the gripper by the movable sleeve 54 is more linear and stable, avoiding wear on the gripper surface due to rotational friction, but also serves as a limit to prevent the movable sleeve from dislodging.

[0033] Optionally, in some embodiments, a return spring 57 is also integrated inside the fixing component. For example... Figure 4 As shown, the return spring 57 is fitted onto the fixed inner sleeve 53 and hidden inside the outer shell 52. One end of it abuts against the front inner wall of the outer shell 52 (near the gripper side), and the other end abuts against the end face of the movable sleeve 54. When the nut 55 is loosened, without the spring, the movable sleeve 54 may get stuck on the gripper due to friction and not retract. The presence of the return spring 57 allows the movable sleeve 54 to be pushed back to its original position by its elasticity the moment the nut is removed, causing the elastic gripper 531 to open automatically and release the water injection tube. This detailed design greatly improves the smoothness of the doctor's operation and achieves a convenient experience of "locking with a twist and opening with a loosening".

[0034] Optionally, in some embodiments, the clamping action is described in detail: when the operator tightens the nut 55, the nut advances forward along the threaded section 533, and its end directly pushes against the rear end of the movable sleeve 54. The movable sleeve 54 overcomes the resistance of the return spring 57 and slides forward along the smooth section 532. When the inner wall of the front end of the movable sleeve 54 moves and covers the outer periphery of the elastic gripper 531, because the inner diameter of the movable sleeve is designed to be slightly smaller than the outer diameter of the gripper when it naturally opens (or in conjunction with a conical design), the movable sleeve will force several elastic claw flaps to move closer to the central axis. This radial contraction force acts evenly on the outer water injection pipe 6 passing through the center, achieving a firm clamping.

[0035] Alternatively, in some embodiments, such as Figure 2 As shown, to ensure a secure connection between the device and the drill body, a mounting groove 21 is pre-milled on the outer wall of the outer sleeve rod 2. The inner diameter of the fixing ring 51 matches the bottom diameter of the mounting groove 21. After being inserted into the groove, the ring is axially limited by the side wall of the mounting groove and cannot slide back and forth. This embedded installation method is more reliable than simple friction clamping and can withstand greater axial tensile force. As an alternative embodiment, those skilled in the art can also use set screws or welding to fix the ring, but the groove fit is more conducive to standardized assembly.

[0036] Alternatively, in some embodiments, such as Figure 4 and Figure 5 As shown, the outer casing 52 and the retaining ring 51 are connected by threads. Specifically, a threaded connecting post 521 with external threads extends from the bottom of the outer casing 52, while the retaining ring 51 has a raised mounting seat 511 with an internal threaded hole. During installation, the retaining component is simply screwed into the mounting seat 511. This modular connection means that the retaining component can be manufactured and replaced as an independent accessory. If the clamping mechanism is damaged, there is no need to replace the entire drill outer sleeve; simply unscrew the old component and replace it with the new one, greatly reducing maintenance costs.

[0037] Alternatively, in some embodiments, such as Figure 2 As shown, the guide seat 4 is designed to complement the overall water system. The guide seat 4 is screwed onto the end of the outer sleeve rod 2, serving to support the drill 3. Its head has a precision guide hole through which the drill 3 passes. The water inlet connector 41 is located on the side, and the water inlet channel formed by the internal drill hole directs the water flow to the guide hole. After the external water inlet pipe 6 is clamped by the fixing device 5, it is connected to the water inlet connector 41. Physiological saline flows through the channel to the surface of the drill, utilizing the centrifugal force of the drill's high-speed rotation to form a water mist, achieving cooling and rinsing.

[0038] The overall working principle of the scheme described in this application embodiment is as follows: During preoperative preparation, the doctor first connects the end of the external water injection pipe 6 to the water injection connector 41 on the guide seat 4. At this time, the pipeline is in a free state. Subsequently, the doctor gently presses the middle section of the water injection pipe 6 into or through the center of the fixing inner sleeve 53 of the fixing device 5. Then, the doctor rotates the nut 55 clockwise, the nut pushes the movable sleeve 54 forward, compresses the return spring 57, and squeezes the elastic clamp 531 to contract, firmly locking the water injection pipe 6 next to the outer rod 2 of the drill. During the operation, no matter how high the drill rotates or moves, the pipeline remains stationary, ensuring a continuous and stable supply of coolant without obstructing the field of vision. After the operation, the nut 55 is loosened counterclockwise, the return spring 57 pushes the movable sleeve 54 back, the clamp is released, and the pipeline can be easily removed for disposal or cleaning.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A neuroendoscopic drill with a water injection tube fixing device, comprising a handle assembly (1), a drive device (11) disposed within the handle assembly (1), an outer sleeve rod (2) fixedly connected to the front end of the handle assembly (1), and a drill (3) coaxially passing through the outer sleeve rod (2); characterized in that, The outer sleeve rod (2) is provided with a guide seat (4) at one end away from the handle assembly (1), and the guide seat (4) is provided with a water injection connector (41) for supplying liquid to the head end of the drill (3); a fixing device (5) is also provided at one end of the outer sleeve rod (2) near the water injection connector (41), and the fixing device (5) is used to fix the external water injection pipe (6) connected to the water injection connector (41). The fixing device (5) includes a fixing ring (51) and a fixing component. The fixing ring (51) is fixedly sleeved on the outer sleeve rod (2), and the fixing component is installed on the fixing ring (51). The fixing assembly includes an outer shell (52), a fixed inner sleeve (53) disposed inside the outer shell (52), a movable sleeve (54) sleeved on the fixed inner sleeve (53), and a nut (55); the outer shell (52) is fixedly connected to the fixing ring (51); The fixed inner sleeve (53) is coaxially disposed inside the outer shell (52) and fixedly connected to the outer shell (52). The fixed inner sleeve (53) has a central channel through which the external water injection pipe (6) passes, and one end of the fixed inner sleeve (53) is provided with a plurality of elastic claws evenly distributed in a ring. The plurality of elastic claws together constitute an elastic gripper (531). The movable sleeve (54) is slidably fitted onto the fixed inner sleeve (53) along the axial direction of the fixed inner sleeve (53), and the nut (55) is threadedly connected to the fixed inner sleeve (53). By tightening the nut (55), the movable sleeve (54) can be pushed to move axially toward the elastic gripper (531), so that the movable sleeve (54) abuts against and squeezes the elastic gripper (531), forcing the elastic gripper (531) to contract toward the center to clamp the external water injection pipe (6).

2. The neuroendoscopic drill with a water injection tube fixation device according to claim 1, characterized in that, The fixed inner sleeve (53) is divided into a gripping section, a smooth section (532) and a threaded section (533) along the axial direction; the elastic gripping clamp (531) is provided on the gripping section, the movable sleeve (54) is sleeved on the smooth section (532), and the nut (55) is threadedly connected to the threaded section (533).

3. A neuroendoscopic drill with a water injection tube fixing device according to claim 2, characterized in that, The outer shell (52) has an inner cavity for accommodating the fixed inner sleeve (53). A connecting seat (56) is provided on the smooth section (532) of the fixed inner sleeve (53). The fixed inner sleeve (53) is fixedly connected to the outer shell (52) through the connecting seat (56). A slot (541) is provided on the side wall of the movable sleeve (54) for the connecting seat (56) to pass through. The slot (541) extends along the axial direction of the movable sleeve (54), and the width of the slot (541) is adapted to the width of the connecting seat (56) so as to allow the movable sleeve (54) to slide along the axial direction of the smooth section (532) under the limitation of the connecting seat (56).

4. A neuroendoscopic drill with a water injection tube fixing device according to claim 3, characterized in that, The fixing component also includes a return spring (57), which is located inside the outer shell (52), with one end abutting against the end of the outer shell (52) near the elastic gripper (531), and the other end abutting against the end of the movable sleeve (54).

5. A neuroendoscopic drill with a water injection tube fixation device according to claim 4, characterized in that, When the nut (55) is tightened, its end abuts against the end of the movable sleeve (54) away from the return spring (57), pushing the movable sleeve (54) to slide along the smooth section (532) and compress the return spring (57); when the movable sleeve (54) moves to the outer periphery of the elastic gripper (531) covering the gripper section, the inner wall of the movable sleeve (54) forces the radial dimension of the elastic gripper (531) to decrease.

6. A neuroendoscopic drill with a water injection tube fixation device according to claim 1, characterized in that, An installation groove (21) is provided on the outer wall of the outer sleeve rod (2), and the fixing ring (51) is fixedly sleeved and snapped into the installation groove (21).

7. A neuroendoscopic drill with a water injection tube fixing device according to claim 1, characterized in that, The bottom of the outer shell (52) is provided with a threaded connecting post (521), and the fixing ring (51) is provided with a mounting seat (511) with an internal thread hole. The threaded connecting post (521) and the mounting seat (511) are threaded together to realize the fixed connection between the fixing component and the fixing ring (51).

8. A neuroendoscopic drill with a water injection tube fixing device according to claim 1, characterized in that, The guide seat (4) includes a guide part (42) and a head (43). The guide part (42) is threadedly connected to the end of the outer sleeve rod (2). The guide seat (4) is provided with a guide hole for the drill (3) to pass through. The water injection connector (41) is located on the side of the head (43). The head (43) has a water injection channel (431) inside that connects the water injection connector (41) and the guide hole.

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