Disposable electric bone rasp

Abstract

The invention discloses a disposable electric bone file, comprising an inner knife tube, an outer knife tube, a transmission structure and a connecting piece, the transmission structure comprising an upper transmission shaft and a lower transmission shaft; the outer knife tube is sleeved on the outer circumference of the inner knife tube; the ends of the outer knife tube are respectively extended out from the two ends of the inner knife tube, one end of the inner knife tube is provided with a file head, and the other end is axially fixed with the upper transmission shaft, the connecting piece is sleeved with the outer circumference of the upper transmission shaft and is tooth-shaped connected with the upper transmission shaft, and the upper transmission shaft and the lower transmission shaft realize the axial reciprocating movement of the inner knife tube relative to the outer knife tube through the fitting and extrusion of the contour surface, thereby realizing the function of electric grinding, the inner knife tube is a hollow metal tube, the file head is provided with a suction hole, the connecting piece is provided with an air suction port, the air suction port, the hollow metal tube and the suction port are connected to each other, the invention is connected to the handle of the planing system, and the file is driven to reciprocate by a motor, so as to realize efficient and accurate grinding; when in use, the invention will be connected to a negative pressure suction pump, which can effectively absorb the bone chips ground down.

Description

Technical Field

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

[0002] In arthroscopic surgery, bone files are mainly used to grind the surface of bone tissue to expose the active layer of bone tissue. Currently, most bone files on the market are manual files, which are composed of a stainless steel file head and a handle at the tail. This type of bone file has the advantages of simple structure, effective and low cost. However, this type of bone file also has many disadvantages:

[0003] 1. Manual grinding is required, which has low operating efficiency and greatly prolongs the operation time.

[0004] 2. The reuse of instruments poses a certain risk of cross infection.

[0005] 3. Traditional manual files have no chip removal function, and the bone chips produced by grinding cannot be removed in time. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems and provide a disposable electric bone rasp, comprising an inner blade tube, an outer blade tube, a transmission structure and a connector for connecting a motor drive shaft, wherein the transmission structure comprises a housing, an upper transmission shaft and a lower transmission shaft, wherein the upper transmission shaft is arranged inside the housing, and the housing is fixed with the lower transmission shaft by a buckle;

[0007] The connecting piece is sleeved on the outer circumference of the upper transmission shaft, and the connecting piece and the upper transmission shaft are connected through a tooth shape, and a spring is provided inside the connecting piece to press the end of the upper transmission shaft;

[0008] The outer knife tube is sleeved on the outer circumference of the inner knife tube, and both ends of the inner knife tube extend out of the outer knife tube. A file head is fixed to one end of the inner knife tube, and the outer circumference of the other end of the inner knife tube is axially fixed to the upper transmission shaft. The outer knife tube is connected to the lower transmission shaft through a pin, and the inner knife tube is provided with a waist groove, and the pin is inserted in the waist groove.

[0009] Furthermore, when the connecting member rotates and drives the upper transmission shaft to rotate, the matching contour end surfaces of the upper transmission shaft and the lower transmission shaft fit and squeeze each other to achieve axial reciprocating motion of the inner knife tube relative to the outer knife tube.

[0010] Furthermore, two steel balls are provided between the two contour end surfaces, and two steel ball holes are provided on the contour end surface of the lower transmission shaft. The two steel ball holes are symmetrically arranged with each other, and the two steel balls are respectively fixed in the two steel ball holes.

[0011] Furthermore, the inner blade tube is a hollow metal tube, a suction hole is provided on the surface of the file head, the inner blade tube and the suction hole are interconnected, and the connecting piece is connected to a negative pressure suction pump that can be directly connected to the inner blade tube.

[0012] Furthermore, a magnetic induction component is sleeved on the outer periphery of the upper transmission shaft, and the magnetic induction component is arranged inside the shell, and a magnet for distinguishing specifications is installed inside the magnetic induction component.

[0013] Furthermore, the number of the magnet is at least 1.

[0014] Furthermore, the file head is a sawtooth-shaped file head.

[0015] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: electric grinding can be realized, by connecting to the handle of the planing system, the file is driven to move back and forth by a motor, and the grinding speed can be adjusted, so that efficient and accurate grinding can be achieved; the present invention is a disposable consumable provided in a sterile manner, which can reduce the risk of cross infection; the present invention will be connected to a negative pressure suction pump when in use, which can effectively absorb the bone chips ground down. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall structural diagram of a disposable electric bone rasp of the present invention;

[0017] Figure 2 An internal schematic diagram of the transmission structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the connection between the upper transmission shaft and the lower transmission shaft and other structures of the present invention;

[0019] Figure 4 It is a schematic diagram of the connection between the lower transmission shaft, the outer knife tube and the inner knife tube of the present invention;

[0020] Figure 5 Schematic diagram of the suction hole structure of the file head.

[0021] In the figure, 1. connecting part; 2. transmission structure; 21. upper transmission shaft; 22. lower transmission shaft; 23. housing; 24. steel ball; 3. outer knife tube; 4. inner knife tube; 5. file head; 51. suction hole; 6. magnet; 7. spring; 8. pin; 9. waist groove. DETAILED DESCRIPTION

[0022] A disposable electric bone rasp 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" and the like, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0024] like Figure 1 and 2 As shown, a disposable electric bone rasp comprises a connecting member 1, a magnetic induction member, a transmission structure 2, a knife tube and a rasp head 5 arranged in sequence from left to right. The connecting member 1 is used to connect the motor drive of the planing handle to provide power for the present invention; the magnetic induction member is used to distinguish the product specifications of the present invention by the planing handle and change the rotation speed according to the specifications; the transmission structure 2 is used to fit and extrude the internal contour to realize the reciprocating motion of the rasp head 5; the knife tube is used to connect the transmission structure 2 and the rasp head 5; the rasp head 5 is used to grind the surface of bone tissue.

[0025] refer to Figure 3 The transmission structure includes a shell 23, an upper transmission shaft 21 and a lower transmission shaft 22. The shell 23 is a hollow shell, which is sleeved on the outer circumference of the upper transmission shaft 21 and the lower transmission shaft 22, one end of which is fixed by a snap-on interface extending from the bottom of the lower transmission shaft 22, and the other end is provided with an end cover on the outer circumference of the connecting member 1. The end cover is provided with a snap-on interface matching the shell 23 and is snap-on fixed at the snap-on interface; the knife tube includes an inner knife tube 4 and an outer knife tube 3, one end of the connecting member 1 is connected to the planing handle, and the other end is sleeved on the outer circumference of the upper transmission shaft 21 and connected to the upper transmission shaft 21 through a tooth shape. The specific setting of the tooth shape link is: tooth grooves are arranged at equal intervals on the outer circumference of the connection between the upper transmission shaft 21 and the connecting member 1, and correspondingly, a tooth key is arranged on the inner circumference of the connecting member 1 in cooperation with its tooth groove, and the tooth groove and the tooth key form a tooth shape link that meshes with each other, so that when the connecting member rotates, the meshing of the tooth groove and the tooth key can drive the upper transmission shaft 21 to rotate. The upper transmission shaft 21 is axially fixed to the inner knife tube 4 and is disposed at the outer periphery near the left end, so that the upper transmission shaft 21 can drive the inner knife tube 4 to move axially and can also rotate at the outer periphery of the inner knife tube 4 .

[0026] refer to Figure 4 , the inner knife tube 4 is provided with a waist groove 9, the outer knife tube 3 and the lower transmission shaft 22 at the same position are provided with a through hole, the through hole is provided with a pin 8, the pin 8 passes through the lower transmission shaft 22 and the outer knife tube 3 to fix the two to each other, and the pin 8 passes through the inner knife tube 4 through the waist groove 9. This structural setting makes the outer knife tube 3 and the lower transmission shaft 22 immovable, and the inner knife tube 4 can only reciprocate left and right relative to the outer knife tube 3 and the lower transmission shaft 22.

[0027] The power source of the inner knife tube 4 is the transmission structure 2. The upper transmission shaft 21 and the lower transmission shaft 22 of the transmission structure 2 are provided with two contour surfaces for matching. The contour surface of the lower transmission shaft 22 is fixed. The upper transmission shaft 21 rotates on the outer periphery of the inner knife tube 4 driven by the connecting member 1. Due to the special up and down undulating curved surface of the contour surface, when the contour surface of the upper transmission shaft 21 fits and squeezes with the contour surface of the lower transmission shaft 22, because the lower transmission shaft 22 is fixed and cannot move, the upper transmission shaft 21 performs left and right axial reciprocating motion relative to the lower transmission shaft 22. Since the upper transmission shaft 21 is axially fixed with the inner knife tube 4, the upper transmission shaft 21 drives the inner knife tube 4 to reciprocate relative to the lower transmission shaft 22. Also, because the lower transmission shaft 22 and the outer blade tube 3 are fixed by the pin 8, the inner blade tube 4 reciprocates relative to the outer blade tube 3. The left end of the inner blade tube 4 extends out of the outer blade tube 3 and is connected and fixed with a file head 5. Therefore, when the connecting member 1 is connected to the planing handle, when the connecting member 1 rotates, the file head 5 performs axial reciprocating motion to realize the electric grinding function. The file head 5 is a file head 5 with a serrated structure, which makes the grinding efficiency higher.

[0028] It is worth noting that at the toothed connection between the connecting member 1 and the upper transmission shaft 21, a spring 7 is arranged inside the connecting member 1, one end of the spring 7 is close to the internal end face of the connecting member 1, and the other end of the spring 7 is pressed against the end of the upper transmission shaft 21, so that the contour surfaces of the upper transmission shaft 21 and the lower transmission shaft 22 are always in close contact and extrusion.

[0029] Furthermore, we set two steel balls 24 between the contour surfaces of the upper transmission shaft 21 and the lower transmission shaft 22. Correspondingly, two steel ball holes for placing the steel balls 24 are set on the contour surface of the lower transmission shaft 22. The depth of the steel ball holes is slightly greater than the radius of the steel balls 24. In this way, the position of the steel balls 24 can be fixed without affecting the role played by the steel balls 24. The setting of the steel balls 24 prevents the contour surfaces of the upper transmission shaft 21 and the lower transmission shaft 22 from directly contacting each other, and avoids direct extrusion of the contour surfaces of the upper transmission shaft 21 and the lower transmission shaft 22 when the upper transmission shaft 21 rotates. Since the upper transmission shaft 21 and the lower transmission shaft 22 are made of plastic material, when the two are rubbed at high speed, the temperature will rise rapidly. When the temperature is too high, the upper transmission shaft 21 and the lower transmission shaft 22 will melt.

[0030] The magnetic induction component is arranged inside the housing 23 of the transmission structure 2, and is sleeved on the outer periphery of the upper transmission shaft 21. A plurality of magnet mounting grooves are provided. When the present invention is installed on the handle of the planing system, the handle can sense the number of magnets 6, thereby identifying 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 6 represents the first gear rotation speed, two magnets 6 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 6 of the magnetic induction part and automatically adjusts the rotation speed. The present invention is provided with 4 magnets 6. Of course, more than 4 magnets 6 do not affect the use effect of the present invention. Of course, the magnetic induction function of the present invention is realized by identifying the position and number of magnets 6, and this scheme can also be replaced by realizing it by identifying the magnetic induction intensity.

[0031] refer to Figure 5 The innovation of the present invention also lies in that the inner blade tube 4 is set as a hollow metal tube, and the file head 5 is provided with a suction hole 51. The suction hole 51 and the hollow inner blade tube 4 are connected to each other. When the product of the present invention is used, it will be connected to a negative pressure suction pump, which is connected to the hollow inner blade tube 4, and can suck bone chips out of the human body while grinding.

[0032] It should be noted that the product of the present invention is a disposable consumable provided in a sterile manner, which can reduce 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 electric bone rasp, characterized in that: It includes an inner knife tube, an outer knife tube, a transmission structure and a connector for connecting a motor drive shaft, wherein the transmission structure includes a housing, an upper transmission shaft and a lower transmission shaft, wherein the upper transmission shaft is arranged inside the housing, and the housing is fixed with the lower transmission shaft by buckle; The connecting piece is sleeved on the outer circumference of the upper transmission shaft, and the connecting piece is toothedly connected with the upper transmission shaft, and a spring is provided inside the connecting piece to press the end of the upper transmission shaft; The outer knife tube is sleeved on the outer circumference of the inner knife tube, both ends of the inner knife tube extend out of the outer knife tube, a file head is fixed on one end of the inner knife tube, and the outer circumference of the other end of the inner knife tube is axially fixed to the upper transmission shaft, the inner knife tube is provided with a waist groove, and the outer knife tube and the lower transmission shaft at the same position are provided with a through hole, and the through hole is provided with a pin, which passes through the lower transmission shaft and the outer knife tube to fix the two to each other; When the connecting member rotates and drives the upper transmission shaft to rotate, the matching contour end surfaces of the upper transmission shaft and the lower transmission shaft fit and squeeze each other to achieve axial reciprocating motion of the inner knife tube relative to the outer knife tube.

2. The disposable electric bone rasp according to claim 1, characterized in that: Two steel balls are arranged between the two contour end surfaces, and two steel ball holes are arranged on the contour end surface of the lower transmission shaft. The two steel ball holes are symmetrically arranged with each other, and the two steel balls are respectively fixed in the two steel ball holes.

3. The disposable electric bone rasp according to claim 2, characterized in that: The inner blade tube is a hollow metal tube, a suction hole is provided on the surface of the file head, the inner blade tube and the suction hole are interconnected, and the connecting piece is connected to a negative pressure suction pump that can be directly connected to the inner blade tube.

4. The disposable electric bone rasp according to claim 3, characterized in that: The outer periphery of the upper transmission shaft is sleeved with a magnetic induction component, the magnetic induction component is arranged inside the shell, and a magnet for distinguishing specifications is installed inside the magnetic induction component.

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

6. The disposable electric bone rasp according to claim 1, characterized in that: The file head is a sawtooth structure file head.

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