Porous micro-fracture planetary drill bit

Abstract

A porous micro-fracture planetary drill bit relates to the field of medical equipment and comprises an outer pipe, a driving shaft, a transmission assembly and a plurality of drill bit bodies. The driving shaft and the plurality of drill bit bodies are arranged in the outer pipe in a penetrating manner; the transmission assembly is in transmission connection with the drill bit bodies at the same time. The drive shaft is connected with one of the multiple drill bit bodies, and the drive shaft is matched with the transmission assembly so as to transmit torque to each drill bit body. By means of the structural design of the drill bit, a plurality of holes which are evenly distributed and consistent in depth can be obtained at the same time, bone walls are not prone to being formed, iatrogenic fractures caused by overlapping of drilling positions and angles are not prone to being caused, and therefore the treatment effect can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of medical equipment, and in particular to a porous micro-fracture planetary drill bit. Background Art

[0002] Articular cartilage injury is a common disease in joint surgery. Articular cartilage injury is caused by multiple factors such as mechanical trauma or inflammation. Due to the lack of blood vessels in cartilage tissue and the weak repair ability of nerves and chondrocytes, the repair and treatment of articular cartilage is still one of the problems that need to be solved urgently in clinical practice. Microfracture is a minimally invasive surgical technique performed under full arthroscopy. At present, microfracture hand awls are often used to create microfractures on the exposed subchondral bone sclerosis surface to allow bone marrow components to overflow and promote articular surface cartilage repair. In arthroscopic surgery, the drilling depth is about 3mm, and the drilling spacing is controlled to be 3-4mm. Due to the mechanical action of the hand awl, the bone is compacted to form a closed "bone wall", which affects the entry and exit of active bone marrow cells. In addition, the 3mm shallow bone marrow channel fails to obtain deep bone marrow, thus affecting the clinical efficacy. In addition, cartilage repair usually requires the formation of multiple microfractures in the cartilage defect area. The current hand awl is not convenient for controlling the angle, spacing, and depth, which can easily cause microfracture fragmentation, damage to the mechanical structure of the subchondral bone, and form iatrogenic fractures. Summary of the invention

[0003] The objects of the present invention include, for example, providing a porous microfracture planetary drill bit, which can simultaneously obtain multiple holes with uniform distribution and consistent depth, is not easy to form bone walls, and is not easy to cause iatrogenic fractures due to overlapping drilling positions and angles, thereby effectively improving the treatment effect.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a porous microfracture planetary drill bit, comprising an outer tube, a drive shaft, a transmission assembly and a plurality of drill bit bodies, wherein:

[0006] The drive shaft and the multiple drill bit bodies are both inserted into the outer tube; the transmission assembly is simultaneously transmission-connected to the multiple drill bit bodies; the drive shaft is connected to one drill bit body among the multiple drill bit bodies, and the drive shaft cooperates with the transmission assembly to transmit torque to each of the drill bit bodies respectively.

[0007] In an optional embodiment, the transmission assembly includes a plurality of transmission gears, and the plurality of transmission gears are respectively connected to the plurality of drill bit bodies one by one, and the corresponding two transmission gears are meshed; when the drive shaft drives one of the drill bit bodies to rotate, the remaining drill bit bodies rotate with the cooperation of the plurality of transmission gears.

[0008] In an optional embodiment, one of the multiple transmission gears is a driving gear, and the remaining transmission gears are driven gears, and all the driven gears are meshed with the driving gear; the drive shaft is connected to the drill bit body on which the driving gear is installed.

[0009] In an optional embodiment, a plurality of the driven gears are arranged at intervals around the axis of the driving gear.

[0010] In an optional embodiment, at least two driven gears among the plurality of driven gears have a spacing in the axial direction of the drive shaft.

[0011] In an optional embodiment, the drive shaft includes a first shaft body, a first serpentine hose and a second shaft body, the first shaft body, the first serpentine hose and the second shaft body are connected in sequence, the first shaft body is used to transmit torque to the second shaft body through the first serpentine hose; the second shaft body is connected to one drill bit body among the multiple drill bit bodies.

[0012] In an optional embodiment, the transmission assembly also includes multiple transmission shafts and multiple second serpentine hoses, the multiple transmission shafts are connected to the multiple second serpentine hoses one-to-one, the multiple second serpentine hoses are connected to the multiple drill bit bodies one-to-one, and the transmission gears are installed on the corresponding transmission shafts; the second serpentine hoses are used to transmit the torque of the transmission shaft to the corresponding drill bit body.

[0013] In an optional embodiment, a portion of the outer tube is configured as a deformable tube body with an adjustable angle; the position of the first snake-bone hose or the second snake-bone hose corresponds to the position of the deformable tube body.

[0014] In an optional embodiment, the porous microfracture planetary drill bit also includes a carrier, the multiple drill bit bodies are mounted on the carrier, each of the drill bit bodies is rotatably connected to the carrier, and each of the drill bit bodies is relatively fixed to the carrier in its own axial direction; the drive shaft is rotatably matched with the carrier; the carrier and the outer tube are slidably matched in the extension direction of the outer tube, and the carrier and the outer tube are relatively fixed in the circumferential direction of the outer tube.

[0015] In an optional embodiment, a plurality of guide bars are provided on the tube wall of the outer tube, and the plurality of guide bars are arranged at intervals around the axis of the outer tube; the carrier is located in the area surrounded by the plurality of guide bars and is simultaneously engaged with the plurality of guide bars, and the carrier and the guide bars are slidably engaged in the extension direction of the guide bars.

[0016] The beneficial effects of the embodiments of the present invention include, for example:

[0017] In summary, the porous microfracture planetary drill bit provided in this embodiment can connect the drive shaft to a power source such as a motor, and after the outer tube is placed in the set position of the target to be treated with the arthroscopy, the motor is started, and the motor transmits the torque to one of the multiple drill bit bodies, driving the drill bit body to rotate, and, with the cooperation of the transmission assembly, the torque can be transmitted to each of the remaining drill bit bodies respectively, so that multiple drill bit bodies can be driven to rotate at the same time through a drive shaft, and multiple drill bit bodies are in contact with cartilage, and drilling operations in multiple positions can be performed at the same time, which is highly efficient. The relative positions of multiple drill bit bodies are fixed, and the relative positions of multiple holes are fixed during drilling, and there is no need to repeat multiple positioning, and it is not easy to overlap or misalign the holes, etc., which improves the drilling quality and is not easy to cause iatrogenic fractures. In addition, the drilling method is not easy to compact bone, and it is not easy to have bone walls. The entry and exit of active bone marrow cells are convenient, and the treatment effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a porous micro-fracture planetary drill bit according to an embodiment of the present application;

[0020] Figure 2 A schematic cross-sectional view of a porous micro-fracture planetary drill bit according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a hidden housing of a porous micro-fracture planetary drill bit according to an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the cooperation between the transmission assembly and the drill body of an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a housing according to an embodiment of the present application;

[0024] Figure 6 A schematic diagram of a modified example of a porous micro-fracture planetary drill bit according to an embodiment of the present application;

[0025] Figure 7 For the corresponding Figure 6 A cross-sectional schematic diagram of

[0026] Figure 8 This is a schematic diagram of the cooperation between the transmission assembly and the drill body of a modified example of the embodiment of the present application.

[0027] icon:

[0028] 100-outer tube; 110-guide strip; 120-observation window; 130-through hole; 200-drive shaft; 210-first shaft body; 220-first snake-bone hose; 230-second shaft body; 300-transmission assembly; 310-driving gear; 320-driven gear; 330-transmission shaft; 340-second snake-bone hose; 400-drill body; 500-carrier; 510-outer tube; 520-first end cover; 530-second end cover; 540-guide groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] In the prior art, microfracture surgery uses a hand awl to punch holes, forming one hole at a time, which is inefficient. In addition, due to the mechanical action of the hand awl, the bone is compacted, forming a closed "bone wall", which affects the entry and exit of active bone marrow cells. The depth of the hole obtained by the hand awl is shallow, and the deep bone marrow cannot be obtained, thus affecting the clinical efficacy. In some clinical treatment scenarios, microfracture surgery is performed by drilling, generally using one drill bit, which is inefficient and inconvenient to position. When multiple holes need to be drilled, dislocation or overlap is prone to occur, causing iatrogenic fractures.

[0036] In view of this, the designer provides a porous microfracture planetary drill, which can obtain multiple holes at the same time, has high drilling efficiency, high quality, and high efficiency of microfracture surgery.

[0037] Please refer to Figure 1-Figure 5 The present embodiment provides a porous microfracture planetary drill bit, comprising an outer tube 100, a drive shaft 200, a transmission assembly 300 and a plurality of drill bit bodies 400. The drive shaft 200 and the plurality of drill bit bodies 400 are both disposed in the outer tube 100; the transmission assembly 300 is simultaneously connected to the plurality of drill bit bodies 400; the drive shaft 200 is connected to one of the plurality of drill bit bodies 400, and the drive shaft 200 cooperates with the transmission assembly 300 to transmit torque to each drill bit body 400 respectively.

[0038] As described above, the porous microfracture planetary drill bit provided in this embodiment works as follows:

[0039] The front end of the outer tube 100 can be placed into the set position of the target to be treated with the arthroscopy, and then the drive shaft 200 can be connected to a power source device such as a motor, and the motor can be started. The motor transmits torque to one of the multiple drill bit bodies 400 to drive the drill bit body 400 to rotate. In addition, with the cooperation of the transmission assembly 300, the torque can be transmitted to each of the remaining drill bit bodies 400. In this way, multiple drill bit bodies 400 can be driven to rotate at the same time through a drive shaft 200. Multiple drill bit bodies 400 are in contact with cartilage. When the drill bit body 400 rotates, an external force is applied to make the motor, the drive shaft 200 and the multiple drill bit bodies 400 have an axial movement tendency, that is, the drill bit body 400 moves toward the inside of the cartilage, so that drilling operations at multiple positions can be performed simultaneously, and the drilling efficiency is high. Since the relative positions of the multiple drill bit bodies 400 are fixed, the relative positions of the multiple holes are fixed during drilling, and repeated positioning is not required, and holes are not likely to overlap or misalign, thereby improving the drilling quality and not causing iatrogenic fractures. In addition, the drilling method is not likely to compact the bone and form bone walls, and the active cells of the bone marrow can enter and exit easily, thereby achieving good treatment effects.

[0040] The following embodiments illustrate the details of the porous micro-fracture planetary drill bit of the present application by way of examples.

[0041] Please refer to Figure 1-Figure 5 In this embodiment, optionally, the porous microfracture planetary drill bit includes an outer tube 100, a drive shaft 200, a transmission assembly 300, a plurality of drill bit bodies 400 and a carrier 500. The carrier 500 is installed inside the outer tube 100, and the carrier 500 and the outer tube 100 can be slidably matched and the two will not rotate relative to each other. The drive shaft 200 and the plurality of drill bit bodies 400 can be rotatably mounted on the carrier 500, and the drive shaft 200 and the drill bit body 400 will not slide relative to the carrier 500 in the extension direction of the outer tube 100. The transmission assembly 300 is connected to the plurality of drill bit bodies 400. The drive shaft 200 is connected to one of the plurality of drill bit bodies 400, and can directly drive one drill bit body 400 to rotate, thereby driving the remaining drill bit bodies 400 to rotate together through a plurality of transmission assemblies 300, thereby realizing the function of drilling multiple holes at the same time.

[0042] In the present embodiment, optionally, the outer tube 100 can be set as a hose, or part of the outer tube 100 can be set as a bendable tube body. For example, in the present embodiment, part of the outer tube 100 is set as a bendable tube body, which can be called a deformable tube body. By bending the deformable tube body, the direction of the front end of the outer tube 100 can be adjusted, thereby changing the drilling direction of multiple drill bit bodies 400, which can adapt to drilling requirements at different angles.

[0043] Please combine Figure 1 and Figure 5 At the same time, a plurality of guide bars 110 are arranged on the wall of the outer tube 100, and the plurality of guide bars 110 are evenly spaced around the axis of the outer tube 100. For example, in this embodiment, the number of guide bars 110 is four, and observation windows 120 are formed between adjacent guide bars 110 in the circumferential direction of the outer tube 100, and the observation windows 120 are connected to the lumen of the outer tube 100. The carrier 500 is located at the observation window 120, so that the position of the carrier 500 can be directly observed from the observation window 120, thereby obtaining the positions of the plurality of drill bit bodies 400, so as to know whether the drilling operation is carried out smoothly.

[0044] In addition, in order to improve the stability of the drill bit body 400, a plurality of through holes 130 may be provided at the front end of the outer tube 100. The number of the through holes 130 is equal to the number of the drill bit bodies 400. Each drill bit body 400 may extend out of the front end of the outer tube 100 or retract into the outer tube 100 through the through hole 130.

[0045] Please refer to Figure 1 and Figure 3Optionally, the carrier 500 includes an outer tube 510, a first end cap 520 and a second end cap 530. The outer tube 510 is generally a circular tube. Four guide grooves 540 are arranged on the outer circumference of the outer tube 510. The four guide grooves 540 are parallel and evenly spaced around the axis of the outer tube 510. The outer tube 510 is located in the area surrounded by the four guide bars 110. The four guide grooves 540 are respectively engaged with the four guide bars 110. In this way, the carrier 500 can slide along the guide bars 110, but will not rotate around its own axis relative to the outer tube 100. The first end cap 520 and the second end cap 530 are both connected to the outer tube 510 and respectively close the two axial ports of the outer tube 510. In this way, an installation chamber is formed inside the carrier 500, which can accommodate the transmission assembly 300 and the drill body 400.

[0046] At the same time, a plurality of first positioning holes are provided on the first end cover 520, and a plurality of second positioning holes are provided on the second end cover 530. The number of the first positioning holes and the second positioning holes is equal and they are matched one by one. Each first positioning hole is coaxial with the corresponding second positioning hole, and the first positioning holes and the second positioning holes matched with each other are provided for the installation of a drill body 400. For example, the drill body 400 can be rotatably matched with the first positioning hole and the second positioning hole at the same time through a bearing, so that the drill body 400 can only rotate relative to the carrier 500, and will not slide in the axial direction of the drill body 400 relative to the carrier 500.

[0047] It should be understood that the number of the first positioning holes and the number of the second positioning holes can be 5 or 7, etc.

[0048] In addition, the arrangement of the plurality of first positioning holes and the plurality of second positioning holes can be designed to be the same, for example, one of the plurality of first positioning holes is located in the middle, and the remaining first positioning holes are distributed around the first positioning hole in the middle and are evenly spaced. In this way, the arrangement of the plurality of drill bit bodies 400 is determined, with one drill bit body 400 in the middle and the remaining drill bit bodies 400 distributed around, which facilitates the arrangement of the transmission assembly 300 and the plurality of drill bit bodies 400, reasonably utilizes the internal space of the outer tube 100, improves the compactness of the structure, reduces the diameter of the outer tube 100, and facilitates drilling in a narrow space.

[0049] In addition, the first end cap 520 and the second end cap 530 can be detachably connected to the outer cylinder 510 to facilitate assembly.

[0050] Please refer to Figure 1 and Figure 3In this embodiment, optionally, the drive shaft 200 includes a first shaft body 210, a first snake-bone hose 220 and a second shaft body 230. The first shaft body 210, the first snake-bone hose 220 and the second shaft body 230 are connected in sequence, and the first shaft body 210 is used to transmit torque to the second shaft body 230 through the first snake-bone hose 220; the second shaft body 230 is connected to one of the multiple drill body 400. For example, the second shaft body 230 can be connected to the drill body 400 located in the middle, or the second shaft body 230 is directly set as an integrated structure with the drill body 400 located in the middle. When in use, the first shaft body 210 can be connected to a power source such as a motor to achieve power input. By setting the first snake-bone hose 220, and the position of the first snake-bone hose 220 corresponds to the position of the deformed tube body, when adjusting the front end direction of the outer tube 100, the first snake-bone hose 220 is adaptively bent, thereby adjusting the front end position of multiple drill bit bodies 400, and drilling can be performed from different directions. At the same time, the first snake-bone hose 220 contacts the inner tube wall of the outer tube 100, and the inner tube wall of the outer tube 100 plays a role in limiting the axial compression of the first snake-bone hose 220. When the axial force is applied to the motor, the axial force can be transmitted to the carrier 500 through the first shaft body 210, the first snake-bone hose 220 and the second shaft body 230, and then the carrier 500 simultaneously drives the multiple drill bit bodies 400 to move axially to achieve drilling.

[0051] Please combine Figure 1 and Figure 4 In this embodiment, the transmission assembly 300 optionally includes a plurality of transmission gears, the number of which is equal to the number of the drill bit bodies 400, which may be 5 or 7, etc., wherein the transmission gear connected to the middle drill bit body 400 may be referred to as a driving gear 310, and the transmission gears connected to the drill bit bodies 400 around the drill bit bodies may be referred to as driven gears 320. All driven gears 320 are arranged around the driving gear 310 and are all meshed with the driving gear 310. The second shaft 230 is connected to the drill bit body 400 in the middle, and when the drill bit body 400 in the middle rotates, all the drill bit bodies 400 around the drill bit bodies can be driven to rotate through the driven gears 320. Furthermore, when the number of drill bit bodies 400 is large, in order to improve the compactness of the structure and avoid an increase in the outer diameter of the outer tube 100, some of the driven gears 320 can be arranged to have a spacing in the axial direction of the outer tube 100. In this way, the plurality of driven gears 320 are not all distributed in the same circumferential direction of the outer tube 100, but are distributed at multiple axial positions of the outer tube 100. No space needs to be reserved in the circumferential direction between adjacent driven gears 320, thereby reducing the outer diameter of the outer tube 100.

[0052] Please combine Figure 6-Figure 8It should be understood that in other embodiments, the angle of the drill body 400 can be adjusted by the structural design of the transmission assembly 300. For example, the transmission assembly 300 further includes a plurality of transmission shafts 330 and a plurality of second serpentine hoses 340. The number of the transmission shafts 330 and the number of the second serpentine hoses 340 are equal to the number of the drill body 400. Each transmission shaft 330 is connected to a drill body 400 through a corresponding second serpentine hose 340, and the transmission gear is installed on the corresponding transmission shaft 330. In this way, when the angle of the outer tube 100 is adjusted, each second serpentine hose 340 can bend adaptively, thereby achieving the angle adjustment of the drill body 400.

[0053] The porous microfracture planetary drill provided in this embodiment realizes the drilling requirements of uniform distribution and consistent depth through multiple transmission gears. Through the rotation of a driving shaft 200, multiple drill bodies 400 can work simultaneously, and multiple holes can be drilled at the same time, with high efficiency, high quality and good treatment effect. In addition, with the snake bone hose, it can realize angle drilling and has strong adaptability.

[0054] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A porous microfracture planetary drill bit, characterized in that: It comprises an outer tube (100), a drive shaft (200), a transmission assembly (300) and a plurality of drill bit bodies (400), wherein: The drive shaft (200) and the plurality of drill bit bodies (400) are both inserted into the outer tube (100); the transmission assembly (300) is simultaneously transmission-connected to the plurality of drill bit bodies (400); the drive shaft (200) is connected to one drill bit body (400) among the plurality of drill bit bodies (400), and the drive shaft (200) cooperates with the transmission assembly (300) to transmit torque to each of the drill bit bodies (400) respectively.

2. The porous microfracture planetary drill bit according to claim 1, characterized in that: The transmission assembly (300) comprises a plurality of transmission gears, and the plurality of transmission gears are respectively connected to the plurality of drill bit bodies (400) in a one-to-one correspondence, and two corresponding transmission gears are meshed; when the drive shaft (200) drives one of the drill bit bodies (400) to rotate, the remaining drill bit bodies (400) rotate in cooperation with the plurality of transmission gears.

3. The porous microfracture planetary drill bit according to claim 2, characterized in that: One of the plurality of transmission gears is a driving gear (310), and the other transmission gears are driven gears (320), and all the driven gears (320) are meshed with the driving gear (310); the drive shaft (200) is connected to the drill body (400) on which the driving gear (310) is installed.

4. The porous microfracture planetary drill bit according to claim 3, characterized in that: The plurality of driven gears (320) are arranged at intervals around the axis of the driving gear (310).

5. The porous microfracture planetary drill bit according to claim 4, characterized in that: At least two driven gears (320) among the plurality of driven gears (320) have a spacing in the axial direction of the drive shaft (200).

6. The porous microfracture planetary drill bit according to claim 2, characterized in that: The driving shaft (200) comprises a first shaft body (210), a first snake-bone hose (220) and a second shaft body (230); the first shaft body (210), the first snake-bone hose (220) and the second shaft body (230) are connected in sequence; the first shaft body (210) is used to transmit torque to the second shaft body (230) through the first snake-bone hose (220); and the second shaft body (230) is connected to one drill bit body (400) among the multiple drill bit bodies (400).

7. The porous microfracture planetary drill bit according to claim 2, characterized in that: The transmission assembly (300) further comprises a plurality of transmission shafts (330) and a plurality of second serpentine hoses (340), wherein the plurality of transmission shafts (330) are connected to the plurality of second serpentine hoses (340) in a one-to-one correspondence, and the plurality of second serpentine hoses (340) are connected to the plurality of drill bit bodies (400) in a one-to-one correspondence, and the transmission gear is mounted on the corresponding transmission shaft (330); the second serpentine hose (340) is used to transmit the torque of the transmission shaft (330) to the corresponding drill bit body (400).

8. The porous microfracture planetary drill bit according to claim 6 or 7, characterized in that: Part of the outer tube (100) is configured as a deformable tube body with an adjustable angle; the position of the first snake-bone hose (220) or the second snake-bone hose (340) corresponds to the position of the deformable tube body.

9. The porous microfracture planetary drill bit according to claim 1, characterized in that: The porous microfracture planetary drill bit also includes a carrier (500), the plurality of drill bit bodies (400) are all mounted on the carrier (500), each of the drill bit bodies (400) is rotatably connected to the carrier (500), and each of the drill bit bodies (400) is relatively fixed to the carrier (500) in its own axial direction; the drive shaft (200) is rotatably matched with the carrier (500); the carrier (500) is slidably matched with the outer tube (100) in the extension direction of the outer tube (100), and the carrier (500) and the outer tube (100) are relatively fixed in the circumferential direction of the outer tube (100).

10. The porous microfracture planetary drill bit according to claim 9, characterized in that: A plurality of guide bars (110) are arranged on the tube wall of the outer tube (100), and the plurality of guide bars (110) are arranged at intervals around the axis of the outer tube (100); the carrier (500) is located in an area surrounded by the plurality of guide bars (110) and is simultaneously engaged with the plurality of guide bars (110); the carrier (500) and the guide bars (110) are slidably engaged in the extension direction of the guide bars (110).

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