A disposable bendable electric bone drill

Abstract

The invention discloses a disposable bendable electric bone drill, comprising an inner knife tube and an outer knife tube. The inner knife tube is arranged inside the outer knife tube, one end of which is connected with a connecting part for connecting a motor driving shaft, and the other end is cut into a flexible metal tube by laser, a drill bit is clamped at the end of the flexible metal tube, and the outer knife tube is arranged on the outer periphery of the inner knife tube. At one end of the drill bit, the outer knife tube is provided with a bending part, a knife hole is provided at the end of the bending part, and an outer knife seat and an adjusting part are provided at the other end of the outer knife tube. The adjusting part comprises a shell, an adjusting wrench and a spring. The adjusting wrench comprises a clamping block and a wrench. The spring, the outer knife seat and the clamping block are sequentially arranged inside the shell, and the clamping block is matched with the outer knife seat. When the wrench is turned, the inner knife tube moves relative to the outer knife tube. The arrangement of the bending part of the invention enables accurate drilling and positioning at various parts of the joint without making multiple access incisions during surgery; the arrangement of the adjusting part realizes the storage and release functions of the drill bit, and avoids damage caused by misoperation.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a disposable bendable electric bone drill. Background Art

[0002] Bone drills are used to drill holes or locate holes in bone tissue during bone and joint surgery. The front part is the cutting edge of the drill bit, and the tail end is a straight rod that can be directly connected to the motor.

[0003] Most existing bone drills are reusable straight drill bits, which have the following disadvantages:

[0004] 1. The operating range of arthroscopic surgery is narrow, and it is difficult for straight drill bits to drill and locate holes in certain narrow or cornered areas. It is often necessary to change the angle of the instrument and make a new entry incision, which not only increases the difficulty of the operation and prolongs the operation time, but also causes more damage to the patient.

[0005] 2. The existing drill bit is made of stainless steel after heat treatment, which has high hardness and rigidity, and there is a risk of breakage or chipping during surgery.

[0006] 3. Existing drill bits are all reusable instruments, which pose a risk of cross infection. The present invention provides a sterile disposable consumable, ensuring the safety of the product.

[0007] 4. The existing drill bit lacks a blade protection mechanism, and it is very easy to pierce surrounding tissues when inserted into the human body, causing harm to the human body. Summary of the invention

[0008] The purpose of the present invention is to solve the above problems and provide a disposable bendable electric bone drill, comprising an inner knife tube and an outer knife tube, one end of the inner knife tube is provided with a connecting portion connected to a motor drive shaft, the other end of the inner knife tube is a flexible metal tube, a drill bit is clamped at the end of the flexible metal tube, and a limit block is provided at the rear end of the drill bit;

[0009] The outer knife tube is arranged on the outer periphery of the inner knife tube, and the outer knife tube is provided with a bending portion at the outer periphery of the flexible metal tube, and a knife hole for extending the drill bit is provided at the end of the bending portion, and the outer knife tube is provided with an adjustment portion at the outer periphery of the other end away from the knife hole to enable the inner knife tube to extend and retract relative to the outer knife tube.

[0010] Furthermore, the adjustment part includes a shell, a spring and an adjusting wrench, the outer knife tube is provided with an outer knife seat inside the shell, the outer knife seat is matched with the adjusting wrench, and the outer knife seat is provided between the spring and the adjusting wrench, and the spring is clamped between the inner end of the shell and the outer knife seat.

[0011] Furthermore, the adjusting wrench is provided with a wrench and a clamping block, the wrench and the clamping block are fixedly connected, the shell is provided with a slot, the wrench extends out of the shell through the slot, the clamping block is arranged inside the shell, and the clamping block is arranged in cooperation with the outer tool holder; the outer tool holder is provided with a first clamping position and a second clamping position on the matching surface with the clamping block.

[0012] Furthermore, when the wrench is pulled downward, the clamping block pushes the outer tool holder, and the clamping block is clamped in the second clamping position, and the drill bit extends out of the tool hole; when the wrench is pulled back upward, the wrench drives the clamping block to rotate, the spring squeezes the outer tool holder so that the clamping block is clamped in the second clamping position, and the drill bit retracts into the outer tool tube.

[0013] Furthermore, a cylindrical protrusion is extended from the other end surface of the outer tool seat away from the clamping block along the outer circumference of the outer tool tube in the direction of the connecting portion, the cylindrical protrusion extends out of the shell, and the spring is sleeved on the outer circumference of the cylindrical protrusion.

[0014] Furthermore, a magnetic induction portion is sleeved on the outer circumference of the inner knife tube, and the magnetic induction portion is arranged between the shell and the connecting portion, and a magnet is installed in the magnetic induction portion.

[0015] Furthermore, the number of the magnet is at least 1.

[0016] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: providing a bone drill with multi-angle bending, so that during surgery, there is no need to make multiple access incisions, and accurate drilling and positioning can be performed in various parts of the joint; the present invention redesigns the drill bit structure, adopts a hollow metal tube structure in the middle, and through laser cutting, the metal tube can be bent at multiple angles, which greatly enhances the toughness of the drill bit and effectively reduces the risk of drill bit breakage; the present invention is a disposable consumable provided in a sterile manner, which can ensure the safety of the product and avoid the risk of cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing the internal structure of a disposable bendable electric bone drill according to the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram after the wrench is pulled down;

[0019] Figure 3 It is a schematic diagram of the positions of the outer tool holder and the clamping block when the wrench is not turned in the present invention;

[0020] Figure 4 This is a schematic diagram of the positions of the outer tool holder and the clamping block after the wrench is pulled down according to the present invention.

[0021] In the figure, 1, connecting part; 2, inner tool tube; 3, flexible metal tube; 4, drill bit; 5, limit block; 6, outer tool tube; 7, outer tool holder; 8, cylindrical protrusion; 9, spring; 10, housing; 11, clamping block; 12, wrench; 13, magnet. DETAILED DESCRIPTION

[0022] A disposable bendable electric bone drill of the present invention will be described in more detail below in conjunction with a schematic diagram, in which a preferred embodiment of the present invention is shown. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the present invention.

[0023] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating 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 cannot be understood as limiting the specific scope of protection of the present invention.

[0024] like Figure 1 and Figure 2 As shown, a disposable bendable electric bone drill includes a connecting part 1 connected to a motor drive shaft, a magnetic sensing part for identifying specifications of an installed product, an inner knife tube 2 connected to the connecting part 1, an outer knife tube 6 sleeved on the outer periphery of the inner knife tube 2, and an adjusting part for adjusting the positional relationship between the inner knife tube 2 and the outer knife tube.

[0025] One end of the inner knife tube 2 is connected and fixed to the above-mentioned connecting part 1, and the other end is a flexible metal tube 3 cut by laser, and a drill bit 4 is provided at the mouth of the flexible metal tube 3; the outer knife tube is a bent metal tube without a cutting edge, and a knife hole is provided at the mouth of the tube. When not in use, the internal flexible metal tube 3 and the drill bit 4 are stored in the outer knife tube 6. When it is needed, the drill bit 4 is extended out of the drilling hole through the adjustment part to release the drill bit 4. A limit block 5 is provided at the tail end of the drill bit 4. The diameter of the limit block 5 is larger than the diameter of the drilling hole to prevent the drill 4 from falling off.

[0026] Furthermore, the present invention has redesigned the structure of the drill bit 4. The front edge of the drill bit 4 can achieve extremely high hardness after heat treatment to meet the needs of drilling. A hollow metal tube structure is adopted in the middle part, and the metal tube can be bent at multiple angles through laser cutting, which greatly enhances the toughness of the drill bit 4 and effectively reduces the risk of the drill bit 4 breaking. Of course, the shape of the drill bit 4 is not unique, and the shape of the drill bit 4 can be changed according to the needs. For example, the drill bit 4 in this embodiment is in the shape of a pointed drill. If a larger hole needs to be drilled, the pointed drill can also be modified into a twist drill without affecting the use effect of the present invention. Similarly, the embodiment of the present invention achieves the feature of being bendable through the laser cutting process, and this feature can also be achieved through other solutions, such as connecting the bending part with a hose or using a gear transmission method.

[0027] The adjustment part is fixed to the outer periphery of the outer knife tube 6, that is, the inner knife tube 2 and the outer knife tube 6 both pass through the adjustment part, and the adjustment part includes a shell 10, a spring 9 and an adjustment wrench. The adjustment wrench includes a wrench 12 and a clamping block 11 that are connected and fixed to each other. The left end of the outer knife tube 6 passes through the adjustment part and an outer knife seat 7 is provided inside the adjustment part. The outer knife seat 7, the spring 9 and the clamping block 11 are all provided inside the shell 10, and the outer knife seat 7 is provided between the spring 9 and the clamping block 11. A cylindrical protrusion 8 is integrally fixed on the left end face of the outer knife seat 7, and the other end of the cylindrical protrusion 8 extends out of the shell 10 and is flush with the end of the outer knife tube 6. The spring 9 is sleeved on the outer periphery of the cylindrical protrusion 8 to prevent the spring 9 from being too active, causing position deformation, and losing its function.

[0028] refer to Figure 3 and Figure 4 The outer tool holder 7 and the clamping block 11 are matched and arranged, and the surface where the outer tool holder 7 and the clamping block 11 match is a slope, which slopes toward the bottom. The place where the clamping block 11 matches the slope is set in an arc, and the slope is provided with a first clamping position and a second clamping position, and the first clamping position and the second clamping position are concave arc pits. When the arc head of the clamping block 11 is stuck in the arc pit, the arc pit can relatively fix the clamping block 11, and accordingly, the state of the outer tool holder 7 is fixed, so the two clamping positions are used to fix the state of the adjustment part after adjustment. The wrench 12 extends out of the housing 10 through the preset slot of the housing 10.

[0029] When starting to work, pull the wrench 12 downward, the wrench 12 drives the clamping block 11 to rotate, and because of the slope, the outer tool holder 7 is squeezed to move to the left, and the outer tool holder 7 moves to the left, driving the outer tool tube 6 to move to the left relative to the inner tool tube 2, and squeezes the spring 9. When the arc head of the clamping block 11 rotates to the second clamping position, the clamping block 11 and the outer tool holder 7 are stuck to form a fixed state. At this time, since the outer tool tube 6 moves to the left relative to the inner tool tube 2, the drill bit 4 at the end of the flexible metal tube 3 of the inner tool tube 2 is able to extend out of the drilling hole, and the limit block of the drill bit is stuck in the drilling hole of the inner tool tube 2, so that the drill bit 4 will not shake easily.

[0030] When work is not needed, the wrench 12 is pulled back upwards, and the wrench 12 drives the clamping block 11 to rotate, and the arc head disengages from the second clamping position. Due to the setting of the slope, a gap is formed between the clamping block 11 and the outer tool holder 7. Under the rebound force of the spring 9, the outer tool holder moves to the right, driving the outer tool tube 6 to move to the right relative to the inner tool tube 2. When the clamping block 11 rotates to the first clamping position of the outer tool holder 7, the clamping block 11 and the outer tool holder 7 are stuck to form a fixed state. At this time, since the outer tool tube 6 moves to the right relative to the inner tool tube 2, the drill bit 4 that extends out of the drilling hole retracts into the drilling hole to prevent misoperation and damage to people or property caused by the drill bit 4.

[0031] The present invention is also provided with a magnetic induction part, and a plurality of magnet installation slots are provided in the magnetic induction part. The present invention is provided with 4 slots. When the present invention is installed on the handle of the planing system, the handle can sense the number of magnets 13, so as to identify the specifications of the installed product of the present invention. The rotation speeds required by the specifications of different products of the present invention are different. For example, one magnet 13 represents the first gear rotation speed, two magnets 13 represent the second gear rotation speed, and so on. Therefore, when the present invention is installed on the handle, the handle senses the number of magnets 13 in the magnetic induction part and automatically adjusts the rotation speed. Of course, the magnetic induction function of the present invention is realized by identifying the position and number of magnets 13. This scheme can also be replaced by realizing it by identifying the magnetic induction intensity, which does not affect the use effect of the present invention.

[0032] It is worth mentioning that the present invention is a disposable consumable provided in a sterile manner, which can ensure the safety of the product and avoid the risk of cross infection.

[0033] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A disposable bendable electric bone drill, characterized in that: It comprises an inner knife tube and an outer knife tube, one end of the inner knife tube is provided with a connecting portion connected to a motor drive shaft, the other end of the inner knife tube is a flexible metal tube, a drill bit is clamped at the end of the flexible metal tube, and a limit block is provided at the rear end of the drill bit; The outer knife tube is arranged on the outer periphery of the inner knife tube, the outer knife tube is provided with a bending portion at the outer periphery of the flexible metal tube, the end of the bending portion is provided with a knife hole for the drill bit to extend, and the outer knife tube is provided with an adjustment portion at the outer periphery of the other end away from the knife hole to enable the inner knife tube to extend and retract relative to the outer knife tube; The adjusting part comprises a shell, a spring and an adjusting wrench, the outer knife tube is provided with an outer knife seat inside the shell, the outer knife seat is arranged in cooperation with the adjusting wrench, and the outer knife seat is arranged between the spring and the adjusting wrench, and the spring is clamped between the inner end of the shell and the outer knife seat; The adjusting wrench is provided with a wrench and a clamping block, the wrench and the clamping block are fixedly connected, the shell is provided with a slot, the wrench extends out of the shell through the slot, the clamping block is arranged inside the shell, and the clamping block is arranged in cooperation with the outer tool holder; the outer tool holder is provided with a first clamping position and a second clamping position on the matching surface with the clamping block.

2. The disposable bendable electric bone drill according to claim 1, characterized in that: When the wrench is pulled downward, the clamping block pushes the outer tool holder, and the clamping block is clamped in the second clamping position, and the drill bit extends out of the tool hole; when the wrench is pulled back upward, the wrench drives the clamping block to rotate, the spring squeezes the outer tool holder so that the clamping block is clamped in the second clamping position, and the drill bit retracts into the outer tool tube.

3. The disposable bendable electric bone drill according to claim 2, characterized in that: A cylindrical protrusion is extended from the other end surface of the outer knife seat away from the clamping block along the outer circumference of the outer knife tube in the direction of the connecting portion. The cylindrical protrusion extends out of the shell, and the spring is sleeved on the outer circumference of the cylindrical protrusion.

4. The disposable bendable electric bone drill according to claim 3, characterized in that: The outer circumference of the inner knife tube is also sleeved with a magnetic induction part, which is arranged between the shell and the connecting part, and a magnet is installed in the magnetic induction part.

5. The disposable bendable electric bone drill according to claim 4, characterized in that: The number of the magnet is at least one.

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