Electric tool for U-shaped osteotomy operation in bone surgery

Abstract

The utility model relates to the field of bone surgery tools, in particular to an electric tool for a U-shaped osteotomy operation in bone surgery, which comprises a main body frame and is characterized in that a U-shaped saw blade guide groove for accommodating a U-shaped saw blade is arranged on the main body frame; a U-shaped saw blade is movably arranged in the U-shaped saw blade guide groove, sawteeth are arranged on one side face of the U-shaped saw blade, and the sawteeth all protrude out of the U-shaped saw blade guide groove. The shaft cavity is arranged on the main body frame on one side of the opening of the U-shaped saw blade guide groove; the motor is adopted to drive the driving device, the driving device drives the U-shaped saw blade to reciprocate, and the U-shaped saw blade cuts sclerotin, so that the physical output of a surgeon is small, the requirement on the operation proficiency of the surgeon is low, the operation time can be shortened, the wound exposure is reduced, the risk of complications in the perioperative period is reduced, and the recovery of a patient is accelerated.

Description

Technical Field

[0001] The utility model relates to the field of bone surgery tools, in particular to an electric tool used for U-shaped osteotomy surgery in bone surgery. Background Art

[0002] Conventional orthopedic osteotomy surgical tools include manually operated osteotomes, osteotome cutters, bone saws, and various power tools. Common power tools include pneumatic tools driven by compressed gas and electric tools driven by motors. Pneumatic surgical tools use compressed gas to blow the impeller to rotate, and then convert the impeller's rotational motion into the oscillating or reciprocating motion of the osteotomy saw blade through mechanisms such as bevel gears, worm gears, cam gears, and column cams. Electric surgical tools operate similarly, except that the rotation of the pneumatic tool's impeller is replaced by the rotation of the motor's rotor. Regardless of the power source, the orthopedic osteotomy surgical tool performs linear motion and forms a straight osteotomy plane.

[0003] In some special cases, surgeons are required to create special shapes, such as U-shaped bone grooves or osteotomy surfaces, for example, the implantation of special-shaped orthopedic implants, i.e., the implantation of intramedullary stabilization columns of joint prostheses, or the removal of special-shaped bone tissue lesions, i.e., the removal of residual bone cement in the medullary cavity during joint revision surgery. In these cases, the pneumatic and electric surgical tools currently used in clinical practice are no longer suitable, and orthopedic surgeons can often only use traditional surgical instruments such as osteotomies and bone knives for operations. The operations have poor precision, the surgeons consume a lot of physical energy, and the operation time is often prolonged, resulting in prolonged wound exposure time and increased blood loss, which ultimately leads to an increased risk of perioperative complications, which is not conducive to accelerated recovery of patients. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an electric tool for U-shaped osteotomy surgery in orthopedics, which can perform U-shaped osteotomy surgery and can save time and effort to chisel out a U-shaped bone groove on the bone surface.

[0005] The utility model discloses an electric tool for U-shaped osteotomy in bone surgery, comprising a main frame, characterized in that a U-shaped saw blade guide groove is provided on the main frame, a U-shaped saw blade is movably matched and provided in the U-shaped saw blade guide groove, and saw teeth are provided on one side surface of the U-shaped saw blade, and the saw teeth all protrude from the U-shaped saw blade guide groove;

[0006] The U-shaped saw blade is connected to a driving device for driving the U-shaped saw blade to perform U-shaped reciprocating motion.

[0007] Preferably, the driving device comprises a driving wheel, and each end of the driving wheel is eccentrically provided with a tenon;

[0008] Both ends of the U-shaped saw blade are provided with mortise and tenon grooves, and the mortises on both ends of the driving wheel are matched and arranged in the two mortise and tenon grooves respectively;

[0009] The driving wheel is connected to a motor, which drives the driving wheel to rotate around the central axis of the driving wheel. The tenon on one end of the driving wheel pulls the U-shaped saw blade toward the driving wheel, and the tenon on the other end of the driving wheel pushes the U-shaped saw blade away from the driving wheel, driving the U-shaped saw blade to move back and forth in the U-shaped saw blade guide groove.

[0010] Preferably, the central axes of the two tenons are arranged in centrosymmetry with respect to the central axis of the driving wheel.

[0011] Preferably, it also includes an axial cavity, which is arranged on the main frame on one side of the opening of the U-shaped saw blade guide groove, and both ends of the U-shaped saw blade guide groove are connected to the axial cavity; the driving wheel is arranged in the axial cavity.

[0012] Preferably, a discharge through hole for discharging bone chips is provided in the area between the U-shaped saw blade guide groove and the shaft cavity.

[0013] Preferably, the tenon is a cylindrical tenon.

[0014] Preferably, the mortise and tenon groove is arc-shaped at both ends, and the length of the mortise and tenon groove is greater than the diameter of the driving wheel.

[0015] Preferably, the depth of the U-shaped saw blade guide groove is greater than the depth of the shaft cavity.

[0016] Preferably, the distance between two adjacent saw teeth on the U-shaped saw blade is smaller than the radius of the driving wheel.

[0017] Preferably, a reinforcing rib for reinforcing the overall rigidity of the main frame is provided on the main frame between the discharge through hole and the shaft cavity, and the serrations protrude from the reinforcing rib.

[0018] The utility model adopts a motor-driven driving device, which drives the U-shaped saw blade to reciprocate. The U-shaped saw blade cuts the bone, and the surgeon consumes less physical energy. It avoids the disadvantages of traditional bone knives and bone chisels that rely on knocking to cut and chisel the bone, such as iatrogenic fractures. The surgical accuracy is improved, and the requirements for the surgeon's surgical proficiency are low. It can shorten the operation time, reduce wound exposure, and thus reduce the risk of perioperative complications, which is conducive to the patient's accelerated recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the main frame of the utility model.

[0020] Figure 2 This is a schematic diagram of the back side of the main frame of the present invention.

[0021] Figure 3 It is a schematic diagram of the left side of the main frame of the utility model.

[0022] Figure 4It is a schematic diagram of the right side of the main frame of the utility model.

[0023] Figure 5 This is a schematic diagram of the saw blade of the present invention.

[0024] Figure 6 It is a schematic diagram of the front and both side end faces of the driving wheel of the utility model.

[0025] Figure 7 This is a front view of the tenon grooves at both ends of the U-shaped saw blade of the present invention after being engaged with the tenons.

[0026] Figure 8 It is a front schematic diagram of the present utility model.

[0027] Figure 9 It is a left side schematic diagram of the present utility model.

[0028] Figure 10 It is a schematic diagram of the right side of the present invention.

[0029] Figure markings: 1-main frame; 2-axial cavity; 3-reinforcement rib; 4-tenon cavity; 6-U-shaped saw blade guide groove; 7-guide groove outer wall; 8-guide groove inner wall; 9-discharge through hole; 10-saw blade; 11-saw teeth; 12-tenon groove; 14-driving wheel; 15-tenon. DETAILED DESCRIPTION

[0030] The utility model discloses an electric tool for U-shaped osteotomy in bone surgery, comprising a main frame 1, characterized in that a U-shaped saw blade guide groove 6 is provided on the main frame 1, a U-shaped saw blade 10 is movably matched and provided in the U-shaped saw blade guide groove 6, and saw teeth 11 are provided on one side surface of the U-shaped saw blade 10, and the saw teeth 11 all protrude from the U-shaped saw blade guide groove 6;

[0031] The U-shaped saw blade 10 is connected to a driving device for driving the U-shaped saw blade 10 to perform U-shaped reciprocating motion.

[0032] The driving device includes a driving wheel 14, and a tenon 15 is eccentrically provided at both ends of the driving wheel 14;

[0033] Both ends of the U-shaped saw blade 10 are provided with a mortise and tenon groove 12, and the tenons 15 on both ends of the driving wheel 14 are matched and arranged in the two mortise and tenon grooves 12 respectively;

[0034] The drive wheel 14 is connected to a motor, which drives the drive wheel 14 to rotate about its central axis. A tenon 15 on one end of the drive wheel 14 pulls the U-shaped saw blade 10 toward the drive wheel 14, while a tenon 15 on the other end of the drive wheel 14 pushes the U-shaped saw blade 10 away from the drive wheel 14, thereby driving the U-shaped saw blade 10 to reciprocate within the U-shaped saw blade guide groove 6. The drive device drives the U-shaped saw blade 10 to reciprocate, and the U-shaped saw blade 10 cuts bone, which reduces the surgeon's physical exertion and avoids iatrogenic fractures and other drawbacks caused by traditional osteotome and osteotome cutting and chiseling by hammering.

[0035] The central axes of the two tenons 15 are arranged in central symmetry with respect to the central axis of the driving wheel 14, so that the U-shaped saw blade 10 runs smoothly, which is beneficial to improving the accuracy of the operation and has low requirements on the doctor's surgical proficiency.

[0036] It also includes an axial cavity 2, which is arranged on the main frame 1 on the opening side of the U-shaped saw blade guide groove 6, and both ends of the U-shaped saw blade guide groove 6 are connected to the axial cavity 2; the driving wheel 14 is arranged in the axial cavity 2, which is conducive to convenient operation of the doctor.

[0037] A discharge through hole 9 for discharging bone chips is provided in the area between the U-shaped saw blade guide groove 6 and the shaft cavity 2 .

[0038] The tenon 15 is a cylindrical tenon 15 , which is beneficial to improving the stability of the operation of the utility model.

[0039] The mortise and tenon groove 12 is arc-shaped at both ends, and the length of the mortise and tenon groove 12 is greater than the diameter of the driving wheel 14 .

[0040] The depth of the U-shaped saw blade guide groove 6 is greater than the depth of the shaft cavity 2 .

[0041] The distance between two adjacent saw teeth 11 on the U-shaped saw blade 10 is smaller than the radius of the driving wheel 14 .

[0042] A reinforcing rib is provided on the main frame 1 between the discharge through hole 9 and the shaft cavity 2 for reinforcing the overall rigidity of the main frame 1 , and the serrations 11 protrude from the reinforcing rib. Example

[0043] The main frame 1 is a rigid integrated structure; the shaft cavity 2 and the U-shaped saw blade guide groove 6 have two intersections, the cavity between the intersections is the shaft cavity 2, and the two cavities outside the intersections are the tenon cavities 4.

[0044] like Figure 1As shown, the main frame 1 includes an axial cavity 2 machined thereon for accommodating a driving wheel 14, a tenon cavity 4 for accommodating a cylindrical tenon 15, a U-shaped saw blade guide groove 6 for placing a U-shaped saw blade 10, and a discharge through-hole 9 for discharging bone chips; the main frame 1 parts on the inner and outer sides of the U-shaped saw blade guide groove 6 form a guide groove inner wall 8 and a guide groove outer wall 7 respectively; the main frame 1 part between the discharge through-hole 9 and the axial cavity 2 forms a reinforcing rib 3.

[0045] like Figure 2 As shown, since the shaft cavity 2, the tenon cavity 4, and the U-shaped saw blade guide groove 6 are all processed on the front side of the main frame 1 and do not pass through the main frame 1, only the discharge through hole 9 is visible in the back view of the main frame 1.

[0046] like Figure 3 As shown, the reinforcing rib 3, the tenon cavity 4 and the guide groove outer wall 7 can be seen on the left side of the main frame 1. Since the depth and curvature radius of the shaft cavity 2 and the tenon cavity 4 are the same, the left side view only shows the tenon cavity 4 on the left side of the main frame 1.

[0047] like Figure 4 As shown, the reinforcing rib 3, the tenon cavity 4 and the guide groove outer wall 7 can be seen on the right side of the main frame 1. Since the depth and curvature radius of the shaft cavity 2 and the tenon cavity 4 are the same, the right side view only shows the tenon cavity 4 on the right side of the main frame 1.

[0048] like Figure 5 As shown, the saw blade is a strip-shaped flexible structure that can be bent into a U shape; one side of the saw blade is provided with saw teeth 11, and both ends are provided with mortise and tenon grooves 12.

[0049] like Figure 6 As shown, the driving wheel 14 is cylindrical, and tenons 15 are eccentrically provided at both ends thereof; wherein the projections of the tenons 15 on the cross section of the driving wheel 14 are symmetrically distributed on both sides of the long axis of the driving wheel 14 .

[0050] like Figure 7 As shown, the saw blade is bent into a U shape, and the tenon grooves 12 on both sides thereof are engaged with the tenons 15 respectively.

[0051] like Figure 8 As shown, Figure 7 After the middle saw blade and the drive wheel 14 are connected, they are placed in the main frame 1 as a whole to form a front view of the utility model; wherein the saw blade is located in the U-shaped saw blade guide groove 6, the drive wheel 14 is located in the shaft cavity 22, and the eccentrically arranged tenon 15 is located in the tenon cavity 4; wherein the eccentrically arranged tenon 15 on one end of the drive wheel 14 is located in a high position, and the tenon groove 12 engaged therewith is also located in a high position, and the eccentrically arranged tenon 15 on the other end of the drive wheel 14 is located in a low position, and the tenon groove 12 engaged therewith is also located in a low position.

[0052] like Figure 9As shown in the left side view of the present invention, the tenon 15 on the right side of the driving wheel 14 is located in the tenon cavity 4, which is engaged with the tenon groove 12 on the right side of the saw blade and is located in a low position.

[0053] like Figure 10 As shown in the right side view of the present invention, the tenon 15 on the left side of the driving wheel 14 is located in the tenon cavity 4, which is engaged with the tenon groove 12 on the left side of the saw blade and is located in a high position.

[0054] When the drive wheel 14 rotates in one direction, the tenon 15 at one end thereof rotates from a low position to a high position, and the tenon groove 12 engaged therewith is also raised to a high position, i.e., one end of the saw blade is pulled upward. Simultaneously, the tenon 15 at the other end of the drive wheel 14 rotates from a high position to a low position, and the tenon groove 12 engaged therewith is also pressed down to a low position, i.e., the other end of the saw blade is pressed downward. In this way, the saw blade can reciprocate in the U-shaped saw blade guide groove 6, and the saw teeth 11 can cut the bone in contact with this reciprocating motion.

Claims

1. An electric tool for U-shaped osteotomy in orthopedics, comprising a main frame, characterized in that: The main frame is provided with a U-shaped saw blade guide groove, in which a U-shaped saw blade is movably matched and arranged, and one side surface of the U-shaped saw blade is provided with saw teeth, and the saw teeth all protrude from the U-shaped saw blade guide groove; The U-shaped saw blade is connected to a driving device for driving the U-shaped saw blade to perform U-shaped reciprocating motion.

2. The electric tool for U-shaped osteotomy surgery according to claim 1, characterized in that: The driving device includes a driving wheel, and each end of the driving wheel is eccentrically provided with a tenon; Both ends of the U-shaped saw blade are provided with mortise and tenon grooves, and the mortises on both ends of the driving wheel are matched and arranged in the two mortise and tenon grooves respectively; The driving wheel is connected to a motor, which drives the driving wheel to rotate around the central axis of the driving wheel. The tenon on one end of the driving wheel pulls the U-shaped saw blade toward the driving wheel, and the tenon on the other end of the driving wheel pushes the U-shaped saw blade away from the driving wheel, driving the U-shaped saw blade to move back and forth in the U-shaped saw blade guide groove.

3. The electric tool for U-shaped osteotomy surgery in orthopedic surgery according to claim 2, characterized in that: The central axes of the two tenons are arranged in centrosymmetry with respect to the central axis of the driving wheel.

4. The electric tool for U-shaped osteotomy in orthopedic surgery according to claim 2, characterized in that: It also includes an axial cavity, which is arranged on the main frame on one side of the U-shaped saw blade guide groove opening, and both ends of the U-shaped saw blade guide groove are connected to the axial cavity; the driving wheel is arranged in the axial cavity.

5. The electric tool for U-shaped osteotomy in orthopedic surgery according to claim 4, characterized in that: A discharge through hole for discharging bone chips is provided in the area between the U-shaped saw blade guide groove and the shaft cavity.

6. The electric tool for U-shaped osteotomy surgery in orthopedic surgery according to claim 5, characterized in that: The tenon is a cylindrical tenon.

7. The electric tool for U-shaped osteotomy in orthopedic surgery according to claim 6, characterized in that: The mortise and tenon grooves are arc-shaped at both ends, and the length of the mortise and tenon grooves is greater than the diameter of the driving wheel.

8. The electric tool for U-shaped osteotomy surgery in orthopedic surgery according to claim 7, characterized in that: The depth of the U-shaped saw blade guide groove is greater than the depth of the shaft cavity.

9. The electric tool for U-shaped osteotomy in orthopedic surgery according to claim 8, characterized in that: The distance between two adjacent saw teeth on the U-shaped saw blade is smaller than the radius of the driving wheel.

10. The electric tool for U-shaped osteotomy surgery in orthopedic surgery according to claim 9, characterized in that: A reinforcing rib for reinforcing the overall rigidity of the main frame is provided on the main frame between the discharge through hole and the shaft cavity, and the serrations protrude from the reinforcing rib.

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