Surgical drill bit capable of preventing bone debris retention

Abstract

The invention discloses a bone scrap retention prevention operation drill bit, and belongs to the technical field of medical instruments, the bone scrap retention prevention operation drill bit comprises a hollow drill bit, a plurality of bone scrap collecting ports are formed in the bottom end of the drill bit in the circumferential direction at equal intervals, a micro spiral conveying shaft is arranged in the drill bit, and a follow-up driving mechanism is assembled between the bottom end of the micro spiral conveying shaft and the drill bit; a plurality of bone chip collecting openings are formed in the bottom end of a drill bit in the circumferential direction at equal intervals, a miniature spiral conveying shaft is arranged in the drill bit, a follow-up driving mechanism is assembled between the miniature spiral conveying shaft and the drill bit, a connecting rod is arranged at the top end of the miniature spiral conveying shaft, and a bone chip collecting box is rotationally arranged on the outer side wall of the miniature spiral conveying shaft; the miniature spiral conveying shaft and the drill bit are driven to rotate, the rotating drill bit cuts bones to form bone holes, bone scraps generated in the cutting process enter the drill bit through the multiple bone scrap collecting openings and are conveyed into the bone scrap collecting box through the rotating miniature spiral conveying shaft, and bone scrap retention can be prevented.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a surgical drill bit for preventing bone fragment retention. Background Technology

[0002] In orthopedic surgery, drilling is one of the core procedures, and its quality directly affects the stability of internal fixation devices and postoperative recovery.

[0003] The surgical drill, as a key instrument, creates bone holes by rotating and cutting the bone.

[0004] Chinese Patent Application No. 202420274646.8 discloses an easy-to-use orthopedic surgical drill, including a drill body, an installation mechanism at the top of the drill body, and a drilling limiting mechanism on the side of the drill body. Before surgery, the orthopedic surgical drill is quickly installed with a drive device through the installation mechanism, and the height of the drilling limiting mechanism is adjusted. During surgery, the drive device drives the drill body to rotate and cut the bone to form a bone hole until it reaches the height limited by the drilling limiting mechanism.

[0005] The aforementioned existing technology has the following problems: During the operation, bone fragments may remain in the spiral grooves of the existing orthopedic surgical drill, causing blockage of the chip removal channel, forcing the operation to be interrupted to clean the drill, prolonging the operation time. At the same time, the retained bone fragments will increase the frictional resistance between the surgical drill and the bone tissue, causing a sudden increase in local temperature, which can easily lead to bone thermal injury.

[0006] In view of this, a surgical drill bit that prevents bone fragment retention was designed to solve the above problems. Summary of the Invention

[0007] To address the problems mentioned in the background section, this invention provides a surgical drill bit designed to prevent bone fragment retention.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a surgical drill bit for preventing bone fragment retention, comprising a hollow drill bit, wherein a plurality of bone fragment collection ports are equally spaced along the circumference at the bottom end of the drill bit, a miniature spiral conveying shaft is provided inside the drill bit, a follow-up drive mechanism is assembled between the bottom end of the miniature spiral conveying shaft and the drill bit, a connecting rod is provided at the top end of the miniature spiral conveying shaft, a bone fragment collection box is rotatably connected to the top end of the drill bit via a bearing, a cleaning port with a valve is fixedly connected to the bottom end of the bone fragment collection box, a connecting port is provided at the top end of the bone fragment collection box, and the top end of the connecting rod extends to the outside through the connecting port.

[0009] Furthermore, the follower drive mechanism includes a lifting channel opened inside the bottom end of the drill bit, a plurality of follower slots opened inside the bottom end of the drill bit, and a follower rod fixed to the bottom end of the micro spiral conveying shaft. The lifting channel is connected to the hollow part inside the drill bit. The plurality of follower slots are arranged at equal intervals along the circumference outside the lifting channel and are connected to the lifting channel. The bottom end of the follower rod extends into the lifting channel and a plurality of follower blocks are fixed at equal intervals along the circumference on the outer wall. The number of follower blocks is the same as the number of follower slots and their positions correspond one-to-one. The plurality of follower blocks extend into the plurality of follower slots respectively.

[0010] Furthermore, a lifting drive mechanism is assembled between the micro spiral conveying shaft and the connecting rod and the bone fragment collection box. The lifting drive mechanism includes a lifting rod fixed between the micro spiral conveying shaft and the connecting rod, and two rotating shafts symmetrically arranged along the central axis of the lifting rod. Two side racks are symmetrically embedded and fixed inside the lifting rod. The two ends of the rotating shafts are rotatably connected to the inner wall of the bone fragment collection box through bearings. Gears are fixedly sleeved on the outside of the rotating shafts, and the gears mesh with the adjacent side racks. The height of the follower groove is greater than that of the follower block, which satisfies the lifting conditions of the micro spiral conveying shaft.

[0011] Furthermore, a rotation drive mechanism is assembled between the two gears and the bone fragment collection box. The rotation drive mechanism includes a push-pull groove and two movable through grooves formed at the top and bottom of the bone fragment collection box. Two push-pull cover plates are symmetrically arranged inside the push-pull grooves. The two push-pull cover plates have arc-shaped grooves on their end walls close to each other. The two arc-shaped grooves form a circular groove that surrounds the connecting rod. The two movable through grooves are symmetrically arranged along the connecting opening and communicate with the push-pull grooves. A fixed rod is fixedly connected inside the movable through groove. A movable block is movably connected to the fixed rod through an opening. A connecting spring is elastically sleeved between the side wall of the movable block and the side wall of the corresponding movable through groove outside the fixed rod. The top of the movable block is fixedly connected to the adjacent push-pull cover plate. An upper rack is fixedly connected to the bottom of the movable block. The upper rack meshes with the adjacent gear.

[0012] Furthermore, a follow-up opening and closing mechanism is assembled between the interior of several of the bone fragment collection ports and the micro spiral conveying shaft. The follow-up opening and closing mechanism includes an annular seat fixedly sleeved on the bottom end of the micro spiral conveying shaft and a blocking arm disposed inside the bone fragment collection port. Several connecting arms are evenly spaced along the circumferential direction on the outer wall of the annular seat. The number of connecting arms is the same as the number of blocking arms and their positions correspond one-to-one. The other end of the connecting arm extends into the interior of the blocking arm. The connecting arm and the annular seat, the connecting arm and the blocking arm, and the other end of the blocking arm and the bone fragment collection port are rotatably connected by a connecting shaft.

[0013] Furthermore, the bone fragment collection port is designed with a convex structure, which cooperates with the sealing arm to close the bone fragment collection port.

[0014] Furthermore, an air duct is fixedly connected to the top of the drill bit, and the air inlet of the air duct extends through the bone fragment collection box to the outside.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention has a plurality of bone chip collection ports evenly spaced along the circumference at the bottom end of the drill bit, and a miniature spiral conveying shaft is provided inside the drill bit. A follow-up drive mechanism is assembled between the miniature spiral conveying shaft and the drill bit. A connecting rod is provided at the top end of the miniature spiral conveying shaft, and a bone chip collection box is rotatably provided on the outer side wall. The connecting rod is rotated by the device, which in turn drives the miniature spiral conveying shaft and the drill bit to rotate. The rotating drill bit cuts the bone to form a bone hole. The bone chips generated during the cutting process enter the interior of the drill bit through the plurality of bone chip collection ports and are transported to the bone chip collection box by the rotating miniature spiral conveying shaft, which can prevent bone chips from being trapped.

[0016] 2. The present invention is equipped with a lifting drive mechanism, which can drive the connecting rod to rise and fall. It can protect the connecting rod in the non-connected state without affecting the connection effect, and avoid wear of the connecting rod affecting the connection effect.

[0017] 3. The present invention is equipped with a follow-up opening and closing mechanism. The lifting and lowering drive mechanism drives the connecting rod to rise and fall at the same time as driving the micro spiral conveying shaft to rise and fall. This enables the follow-up opening and closing mechanism to open several bone chip collection ports during the operation of the surgical drill and close several bone chip collection ports after the operation of the surgical drill, which can prevent dust from entering.

[0018] 4. The present invention is equipped with an air duct, which can be selected for use according to the actual surgical situation. It can provide suction inside the drill bit, help bone chips enter the micro spiral conveyor shaft, absorb the heat of the drilling, avoid bone thermal damage, and assist in cleaning. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention in its unoperated state; Figure 2 For the present invention Figure 1 Enlarged view of the local structure; Figure 3 For the present invention Figure 1 Enlarged view of the local structure; Figure 4 This is a cross-sectional view of the follower drive mechanism of the present invention; Figure 5 This is a cross-sectional view of the surgical state of the present invention; In the diagram: 1. Connecting rod; 2. Bone fragment collection box; 3. Cleaning port with valve; 4. Miniature spiral conveyor shaft; 5. Drill bit; 6. Bone fragment collection port; 7. Connecting port; 101. Follower groove; 102. Lifting through groove; 103. Follower block; 104. Follower rod; 201. Gear; 202. Side rack; 203. Lifting rod; 204. Rotating shaft; 301. Push-pull groove; 302. Movable through groove; 303. Push-pull cover plate; 304. Arc groove; 305. Connecting spring; 306. Fixing rod; 307. Movable block; 308. Upper rack; 401. Ring seat; 402. Connecting arm; 403. Sealing arm; 404. Connecting shaft; 501. Air duct. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 This invention provides the following technical solution: a surgical drill bit for preventing bone fragment retention, comprising a hollow drill bit 5, with a plurality of bone fragment collection ports 6 evenly spaced along the circumference at the bottom end of the drill bit 5, a miniature spiral conveying shaft 4 inside the drill bit 5, a follow-up drive mechanism assembled between the bottom end of the miniature spiral conveying shaft 4 and the drill bit 5, a connecting rod 1 at the top end of the miniature spiral conveying shaft 4, a bone fragment collection box 2 rotatably connected to the top end of the drill bit 5 via a bearing, a cleaning port 3 with a valve fixed to the bottom end of the bone fragment collection box 2, a connecting port 7 at the top end of the bone fragment collection box 2, and the top end of the connecting rod 1 extending to the outside through the connecting port 7.

[0022] In this embodiment, please refer to the appendix. Figures 1-2 Before the surgical drill is used, the connecting rod 1 is connected to the drive device. During the surgical drill operation, the drive device drives the connecting rod 1 to rotate, which in turn drives the micro spiral conveyor shaft 4 to rotate. The micro spiral conveyor shaft 4 drives the follower drive mechanism to rotate, which in turn drives the drill 5 to rotate. The rotating drill 5 cuts the bone to form bone holes. The bone fragments generated during the cutting process enter the drill 5 through several bone fragment collection ports 6 and are transported to the bone fragment collection box 2 by the rotating micro spiral conveyor shaft 4. After the surgical drill operation, the valve with the valve cleaning port 3 is opened to pour out the bone fragments collected in the bone fragment collection box 2, which can prevent bone fragments from being retained.

[0023] Specifically, the follower drive mechanism includes a lifting channel 102 opened inside the bottom end of the drill bit 5, a plurality of follower slots 101 opened inside the bottom end of the drill bit 5, and a follower rod 104 fixed to the bottom end of the micro spiral conveying shaft 4. The lifting channel 102 is connected to the hollow part inside the drill bit 5. The plurality of follower slots 101 are arranged at equal intervals along the circumference outside the lifting channel 102 and are connected to the lifting channel 102. The bottom end of the follower rod 104 extends into the lifting channel 102, and a plurality of follower blocks 103 are fixed at equal intervals along the circumference on the outer wall. The number of follower blocks 103 is the same as the number of follower slots 101 and their positions correspond one-to-one. The plurality of follower blocks 103 extend into the plurality of follower slots 101 respectively.

[0024] In this embodiment, please refer to the appendix. Figure 1 , 3 4. The follower drive mechanism drives the follower rod 104 to rotate through the rotating micro spiral conveying shaft 4. The follower rod 104 drives a number of follower blocks 103 to rotate. The number of follower blocks 103 extend into the interior of a number of follower grooves 101, driving the drill bit 5 to rotate, thereby realizing the function of driving the drill bit 5 to rotate with the micro spiral conveying shaft 4.

[0025] Example 2 The difference between this embodiment and Embodiment 1 is that: Specifically, a lifting drive mechanism is assembled between the miniature spiral conveying shaft 4 and the connecting rod 1 and the bone fragment collection box 2. The lifting drive mechanism includes a lifting rod 203 fixed between the miniature spiral conveying shaft 4 and the connecting rod 1, and two rotating shafts 204 symmetrically arranged along the central axis of the lifting rod 203. Two side racks 202 are symmetrically embedded and fixed inside the lifting rod 203. The two ends of the rotating shafts 204 are rotatably connected to the inner wall of the bone fragment collection box 2 through bearings. A gear 201 is fixedly sleeved on the outside of the rotating shafts 204, and the gear 201 meshes with the adjacent side racks 202. The height of the follower groove 101 is greater than that of the follower block 103, which satisfies the lifting conditions of the miniature spiral conveying shaft 4.

[0026] In this embodiment, please refer to the appendix. Figure 1 and 2 In the initial state of the surgical drill, the connecting rod 1 is located in the bone chip collection box 2. In the pre-operative installation state of the surgical drill, the connecting rod 1 is driven through the connecting port 7 to extend to the outside and connect with the drive device by the lifting drive mechanism. This does not affect the connection of the connecting rod 1, but also protects the connecting rod 1 in the non-installed state, and avoids wear of the connecting rod 1 from affecting the connection effect. The lifting drive mechanism drives two side racks 202 to rise through two opposing rotating gears 201. The two side racks 202 drive the lifting rod 203 to rise, and the lifting rod 203 drives the connecting rod 1 and the miniature spiral conveying shaft 4 to rise, thereby realizing the lifting drive of the connecting rod 1 and the miniature spiral conveying shaft 4. The height of the follower groove 101 is greater than that of the follower block 103, which satisfies the rising condition of the micro screw conveyor shaft 4. The downward drive of connecting rod 1 and miniature spiral conveyor shaft 4 is achieved through the aforementioned reverse motion.

[0027] Specifically, a rotation drive mechanism is assembled between the two gears 201 and the bone fragment collection box 2. The rotation drive mechanism includes a push-pull groove 301 and two movable through grooves 302 formed at the top and bottom of the bone fragment collection box 2. Two push-pull cover plates 303 are symmetrically arranged inside the push-pull groove 301. The two push-pull cover plates 303 are respectively provided with arc-shaped grooves 304 close to each other on their end walls. The two arc-shaped grooves 304 form a circular groove that surrounds the connecting rod 1. The two movable through grooves 302 are symmetrically arranged along the connecting opening 7 and are connected to the connecting opening 7. The push-pull groove 301 is connected, and a fixed rod 306 is fixedly connected inside the movable through groove 302. A movable block 307 is movably connected to the fixed rod 306 through an opening. A connecting spring 305 is elastically sleeved between the fixed rod 306 and the side wall of the movable block 307, which is far away from each other, and the side wall of the corresponding movable through groove 302. The top of the movable block 307 is fixedly connected to the adjacent push-pull cover plate 303. An upper rack 308 is fixedly connected to the bottom of the movable block 307. The upper rack 308 is meshed with the adjacent gear 201.

[0028] In this embodiment, please refer to the appendix. Figure 1 and 2 The two gears 201 are driven to rotate by a rotation drive mechanism; The rotation drive mechanism pulls open the two push-pull cover plates 303, causing the two push-pull cover plates 303 to move away from each other, which drives the two movable blocks 307 to move in the same direction. The two movable blocks 307 drive the two upper racks 308 to move in the same direction. During the movement of the two upper racks 308, they drive the two gears 201 to move towards each other, thereby realizing the rotation drive of the two gears 201, that is, realizing the upward drive of the connecting rod 1 and the micro screw conveyor shaft 4. The reverse motion described above drives the rotation of the two gears 201, thereby driving the descent of the connecting rod 1 and the miniature spiral conveying shaft 4.

[0029] Example 3 The difference between this embodiment and embodiment two is that: Specifically, a follow-up opening and closing mechanism is assembled between the interior of several bone fragment collection ports 6 and the micro spiral conveying shaft 4. The follow-up opening and closing mechanism includes an annular seat 401 fixedly sleeved at the bottom end of the micro spiral conveying shaft 4 and a blocking arm 403 disposed inside the bone fragment collection port 6. Several connecting arms 402 are evenly spaced along the circumferential direction on the outer wall of the annular seat 401. The number of connecting arms 402 is the same as the number of blocking arms 403 and their positions correspond one-to-one. The other end of the connecting arm 402 extends into the interior of the blocking arm 403. A connecting shaft 404 is rotatably connected between the connecting arm 402 and the annular seat 401, between the connecting arm 402 and the blocking arm 403, and between the other end of the blocking arm 403 and the bone fragment collection port 6.

[0030] In this embodiment, please refer to the appendix. Figure 1 , 3 During the ascent of the miniature spiral conveyor shaft 4, it drives the follow-up opening and closing mechanism to open and collect bone fragments; The follow-up opening and closing mechanism drives the ring seat 401 to rise through the rising micro spiral conveying shaft 4. The ring seat 401 drives several connecting arms 402 to rotate and rise along the connecting shaft 404. The several connecting arms 402 drive several sealing arms 403 to rotate and rise along the connecting shaft 404, opening several bone fragment collection ports 6. During the descent of the screw conveyor 4, it drives the follow-up opening and closing mechanism to close, preventing dust from entering the drill bit 5; The follow-up opening and closing mechanism closes the bone fragment collection port 6 through the aforementioned reverse movement.

[0031] Specifically, the bone fragment collection port 6 is designed with a convex structure, which works in conjunction with the sealing arm 403 to seal the bone fragment collection port 6.

[0032] In this embodiment, please refer to the appendix. Figure 1 This can better seal the bone fragment collection port 6 and prevent dust from entering the drill bit 5.

[0033] Example 4 The difference between this embodiment and Embodiment 3 is that: Specifically, the top of the drill bit 5 is fixed with an air duct 501, and the air inlet end of the air duct 501 extends through the bone fragment collection box 2 to the outside.

[0034] In this embodiment, please refer to the appendix. Figure 1 Depending on the actual drilling conditions, it is possible to choose whether to use the air duct 501. The air duct 501 is connected to the suction equipment to provide suction inside the drill bit 5, which helps bone chips enter the micro spiral conveyor shaft 4 while absorbing drilling heat and avoiding bone thermal damage.

[0035] Working principle of this invention: Before the surgical drill is used, the two sliding covers 303 are pulled open. The two sliding covers 303 move away from each other, causing the two movable blocks 307 to move in the same direction. The two movable blocks 307 cause the two upper racks 308 to move in the same direction. During the movement of the two upper racks 308, the two gears 201 move towards each other. The two gears 201 moving towards each other cause the two side racks 202 to rise. The two side racks 202 cause the lifting rod 203 to rise. The lifting rod 203 causes the connecting rod 1 and the miniature spiral conveying shaft 4 to rise. The rising connecting rod 1 gradually extends through the connecting port 7 to the outside. The rising miniature spiral conveying shaft 4 causes the ring seat 401 to rise. The ring seat 401 causes several connecting arms 402 to rotate and rise along the connecting shaft 404. Several connecting arms 402 drive several sealing arms 403 to rotate and rise along the connecting shaft 404, gradually opening several bone fragment collection ports 6 until the two push-pull covers 303 are pulled open to their limit and stop. At this time, the connecting rod 1 extends through the connecting port 7 to the outside. Hold the connecting rod 1 and continue to pull it up. At the same time, release the two push-pull covers 303. The two push-pull covers 303 are reset under the action of the two connecting springs 305 and the two movable blocks 307, wrapping the connecting rod 1 and forming a closed structure inside the bone fragment collection box 2 until the connecting rod 1 is pulled up to its limit and stops. At this time, several follower blocks 103 rise to their limit, several bone fragment collection ports 6 open, connecting the connecting rod 1 to the driving device. The surface of the driving device abuts against the bone fragment collection box 2. During the operation of the surgical drill, the connecting rod 1 is driven to rotate by the drive device. The connecting rod 1 drives the micro spiral conveying shaft 4 to rotate. The micro spiral conveying shaft 4 drives the follower rod 104 to rotate. The follower rod 104 drives several follower blocks 103 to rotate. The several follower blocks 103 extend into several follower grooves 101, driving the drill 5 to rotate. The rotating drill 5 cuts the bone to form bone holes. The bone chips generated during the cutting process enter the drill 5 through several bone chip collection ports 6 and are transported to the bone chip collection box 2 by the rotating micro spiral conveying shaft 4. Choose whether to use the air duct 501 based on the actual drilling situation. The air duct 501 is connected to the suction equipment to provide suction inside the drill bit 5, helping bone chips enter the micro spiral conveyor shaft 4 while absorbing drilling heat to avoid bone thermal damage. After the surgical drill is used, open the valve with valve cleaning port 3 to pour out the bone fragments collected in bone fragment collection box 2, which can prevent bone fragments from being retained. After cleaning the surgical drill bit, disconnect the connecting rod 1 from the drive device, pull the two push-pull covers 303 to their limit, push the connecting rod 1 down, causing the lifting rod 203, the miniature spiral conveying shaft 4, and the follower rod 104 to descend. The lifting rod 203 causes the two side racks 202 to descend, the miniature spiral conveying shaft 4 descends, causing the ring seat 401 to descend, the ring seat 401 causes several connecting arms 402 to rotate and descend along the connecting shaft 404, and the several connecting arms 402 cause several sealing arms 403 to rotate and descend along the connecting shaft 404, gradually closing several bone fragment collection ports 6 until the two side racks 202 mesh with the two gears 201 and stop. Release the two push-pull covers 303, and the two push-pull covers... The cover plate 303 is reset under the action of the two connecting springs 305 resetting and the two movable blocks 307 resetting. During the reset process of the two push-pull cover plates 303, the two upper racks 308 move in the same direction. During the movement of the two upper racks 308, the two gears 201 move in opposite directions. The two gears 201 moving in opposite directions drive the two side racks 202 to descend. The two side racks 202 drive the lifting rod 203 to descend. The lifting rod 203 drives the connecting rod 1 and the micro spiral conveying shaft 4 to descend until they stop at the limit. At this time, the two push-pull cover plates 303 cover the connecting rod 1, so that the inside of the bone fragment collection box 2 forms a closed structure. At the same time, several bone fragment collection ports 6 are closed to prevent dust from entering.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bone chip detent resistant surgical drill bit, characterized by, The utility model provides a bone debris collecting device, including hollow type drill (5), a plurality of bone debris collecting port (6) are opened to drill (5) bottom end along the circumference equidistance, the inside of drill (5) is provided with micro -screw conveying shaft (4), the bottom of micro -screw conveying shaft (4) is equipped with follow -up drive mechanism with drill (5), and the top of micro -screw conveying shaft (4) is provided with connecting rod (1), and the top of drill (5) is rotatably connected with bone debris collecting box (2) through bearing, and the bottom of bone debris collecting box (2) is fixed with valve cleaning mouth (3) with, and the top of bone debris collecting box (2) is provided with communicating port (7), and connecting rod (1) top extends to outside through communicating port (7).

2. A bone chip detent surgical drill bit according to claim 1 wherein: The follow-up drive mechanism includes a lifting channel (102) formed in the inside of the bottom end of the drill (5), a plurality of follow-up grooves (101) formed in the inside of the bottom end of the drill (5), and a follow-up rod (104) fixed to the bottom end of the micro-screw conveying shaft (4). The lifting channel (102) is in communication with the hollow portion inside the drill (5). The plurality of follow-up grooves (101) are arranged equidistantly along the circumference outside the lifting channel (102) and in communication with the lifting channel (102). The bottom end of the follow-up rod (104) extends into the lifting channel (102), and the outside wall is fixed with a plurality of follow-up blocks (103) equidistantly along the circumference. The number of follow-up blocks (103) is the same as the number of follow-up grooves (101) and one-to-one corresponding in position. The plurality of follow-up blocks (103) extend into the plurality of follow-up grooves (101) respectively.

3. A chip-retaining surgical drill bit according to claim 2, wherein: The micro-screw conveying shaft (4) and the connecting rod (1) are assembled with the bone debris collecting box (2) through a lifting drive mechanism. The lifting drive mechanism includes a lifting rod (203) fixed between the micro-screw conveying shaft (4) and the connecting rod (1), and two rotating shafts (204) symmetrically arranged along the central axis of the lifting rod (203). Two side racks (202) are symmetrically embedded in the inside of the lifting rod (203). The two ends of the rotating shaft (204) are rotatably connected to the inner wall of the bone debris collecting box (2) through bearings. The rotating shaft (204) is fixedly sleeved with a gear (201) outside. The gear (201) is in meshing connection with the adjacent side rack (202). The height of the follow-up groove (101) is greater than that of the follow-up block (103), which meets the lifting condition of the micro-screw conveying shaft (4).

4. A chip-retaining surgical drill bit according to claim 3, wherein: Two gears (201) and bone debris collection box (2) are assembled with rotating drive mechanism, the rotating drive mechanism includes the push-pull slot (301) and two movable slots (302) which are opened on the top and bottom of the bone debris collection box (2), the push-pull slot (301) is provided with two push-pull cover plates (303) symmetrically inside, two push-pull cover plates (303) are respectively provided with arc-shaped slots (304) on the mutually close end wall, two arc-shaped slots (304) form a circular groove to wrap the connecting rod (1), two movable slots (302) are symmetrically arranged along the communication port (7) and communicated with the push-pull slot (301), the movable slot (302) is fixedly connected with a fixed rod (306) inside, the fixed rod (306) is movably connected with a movable block (307) through the hole sleeve, the fixed rod (306) is elastically sleeved with a connecting spring (305) between the mutually far apart side wall of the movable block (307) and the corresponding movable slot (302) side wall, the movable block (307) top is fixedly connected with the adjacent push-pull cover plate (303), the movable block (307) bottom is fixedly connected with the upper rack (308), the upper rack (308) is engaged with the adjacent gear (201).

5. A chip-retaining surgical drill bit according to claim 4, wherein: A number of bone debris collection ports (6) are assembled with a follow-up opening and closing mechanism inside the micro-spiral conveying shaft (4), the follow-up opening and closing mechanism includes a ring seat (401) fixedly sleeved on the bottom end of the micro-spiral conveying shaft (4) and a sealing arm (403) arranged inside the bone debris collection port (6), the outer side wall of the ring seat (401) is provided with a plurality of connecting arms (402) at equal intervals along the circumference, the number of connecting arms (402) is the same as that of sealing arms (403) and one-to-one corresponding in position, the other end of the connecting arm (402) extends into the sealing arm (403), the connecting arm (402) and the ring seat (401), the connecting arm (402) and the sealing arm (403) and the other end of the sealing arm (403) and the bone debris collection port (6) are rotatably connected with the connecting shaft (404).

6. A debris entrapment surgical drill bit according to claim 5 wherein: The bone debris collection port (6) is provided with a convex structure, which cooperates with the sealing arm (403) to close the bone debris collection port (6).

7. A debris entrapment surgical drill bit according to claim 6 wherein: The drill bit (5) top is fixedly connected with the air pipe (501), the air pipe (501) air inlet end penetrates the bone debris collection box (2) and extends to the outside.

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