Reusable electric swing saw for orthopedic surgery

Abstract

The utility model discloses orthopedic surgery electric swing saw of reusable, include: front swing seat, pipe shell, handle seat, handle shell, battery pack subassembly, front swing seat and pipe shell front port butt joint, swing saw shaft vertical installation is in the front swing seat, saw blade is installed on swing saw shaft upper end through clamping mounting mechanism, pipe shell bottom is opened with threading port, handle seat is installed in threading port outside, be equipped with main plug in handle seat, and motor is connected with main plug through the power supply circuit of threading port, handle shell upper end is sleeved in handle seat outside, and battery pack subassembly is inserted in handle shell from handle shell bottom opening, and install the cover plate on handle shell bottom opening, be equipped with auxiliary plug and power supply button on battery pack subassembly, and auxiliary plug and main plug can butt joint communication, be equipped with start button on handle seat front end, and press down start button can press power supply button, seal pipe shell. The orthopedic surgery electric swing saw can be repeatedly used through high temperature steam disinfection.

Description

Technical Field

[0001] This utility model relates to the field of medical power tools, specifically to a reusable electric oscillating saw for orthopedic surgery. Background Technology

[0002] Electric oscillating saws for orthopedic surgery are used in orthopedic and trauma surgeries, including joint replacement, arthroscopic surgery, joint resection and reconstruction, synovectomy, orthopedic plastic surgery, other joint surgeries, and tumor surgeries. They have a wide range of applications and complex operating methods, requiring performance and operation to meet the needs of various surgeries. Currently available electric oscillating saws for orthopedic surgery suffer from structural limitations that prevent effective protection of electronic components and motors during high-temperature steam sterilization. These components and motors are easily damaged by water ingress, so sterilization is typically limited to wiping the outer surface with alcohol. This results in existing electric oscillating saws being discarded after only a few uses due to ineffective sterilization. There is an urgent need for an electric oscillating saw for orthopedic surgery that can be repeatedly sterilized with high-temperature steam and reused. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electric oscillating saw for orthopedic surgery that can be repeatedly sterilized by high-temperature steam and reused.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a reusable electric oscillating saw for orthopedic surgery, characterized in that it includes: a front swing base, a tube shell, a handle base, a handle shell, and a battery pack assembly. A motor is installed in the tube shell. The front swing base is fixedly connected to the front end of the tube shell. The oscillating saw shaft is rotatably and vertically installed in the front swing base via bearings. The upper and lower ends of the oscillating saw shaft extend out of the front swing base. The saw blade is detachably installed on the upper end of the oscillating saw shaft via a clamping mechanism. The oscillating saw shaft is driven to rotate back and forth by the motor in the tube shell, allowing the saw blade to swing and cut under the drive of the oscillating saw shaft. A wire threading port is provided at the bottom of the tube shell. The handle base is installed on the outside of the wire threading port by screws. A main plug is provided in the handle base. The positive and negative terminals of the motor are connected to the main plug through a power supply circuit passing through the wire threading port. The upper end of the handle shell is fitted onto the outside of the handle base and... The handle base is fixed, and the battery pack assembly is plugged into the handle housing through the bottom opening. A removable cover plate is installed on the bottom opening of the handle housing. The battery pack assembly is equipped with an auxiliary plug and a power button. The auxiliary plug and the main plug can be connected after the battery pack assembly is inserted. A start button that can be manually pressed is located on the front of the handle base. Pressing the start button will press the power button on the battery pack assembly inserted in the handle housing. After the power button is pressed, the battery pack assembly starts to supply power. Electrical energy is transmitted to the motor through the two connected plugs and the power supply circuit. The motor starts to work after being powered on. The rear port of the tube housing is sealed, the joint between the front swing seat and the tube housing is sealed with a sealing ring, the gaps between the upper and lower parts of the swing saw shaft and the front swing seat are sealed with sealing rings, and the wire threading port is sealed with glue after the wire is threaded.

[0005] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery also includes a safety switch assembly. The safety switch assembly is installed in the rear port of the casing, and the installation gap at the rear port of the casing is sealed by a sealing ring. The safety switch assembly is connected to the power supply circuit between the motor and the main plug. The safety switch assembly can be manually operated from the outside. The on / off state of the power supply circuit can be controlled by the safety switch assembly. The motor can only start working after the battery pack assembly is powered on and the power supply circuit is connected through the safety switch assembly.

[0006] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, the safety switch assembly includes: a circular knob housing, a knob seat, and a rotating seat installed in the rear port of the casing. The knob seat is inserted into the knob housing and arranged coaxially with it. The knob seat and the knob housing are fixed together by screws. Four contact pieces are inserted into the knob seat, located at the top, bottom, left, and right of the knob seat respectively. These four contact pieces are used to connect to the motor and the main plug via wires. The rotating seat is rotatably installed in the knob seat and arranged coaxially with it. Two spring plates located inside the four contact pieces are fitted onto the outer wall of the rotating seat. These two spring plates are located on the top and bottom sides of the rotating seat respectively. A useful... The safety knob that drives its rotation is also equipped with three markings: a disconnection marking indicating that the power supply circuit is disconnected, a left connection marking indicating that the power supply circuit is connected, and a right connection marking indicating that the power supply circuit is connected. Initially, the pointer on the safety knob points to the disconnection marking, and the two spring plates only make one-to-one contact with the upper and lower contact plates respectively. After the safety knob is rotated forward by external force, its pointer can point to the left connection marking. After the safety knob is rotated in the reverse direction by external force, its pointer can also point to the right connection marking. When the pointer on the safety knob points to the connection marking, the upper contact plate and the contact plate on one side can be connected by contacting the upper spring plate respectively, and at the same time, the lower contact plate and the contact plate on the other side can be connected by contacting the lower spring plate respectively.

[0007] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery: a limiting groove and three limiting recesses are provided on the knob seat; a limiting protrusion and a ball-loading groove are provided on the rotating seat, located in the limiting groove; a positioning ball with spring force is installed in the ball-loading groove; when the positioning ball is pressed, it can compress the spring and retract into the ball-loading groove without hindering the rotation of the rotating seat; when the safety knob is rotated to the disconnection mark, the positioning ball can be engaged in the middle limiting recess under the action of the spring to position the safety knob; when the safety knob is rotated to the left connection mark, the positioning ball can be engaged in the limiting recess on one side under the action of the spring to position the safety knob; and one end of the limiting groove can be blocked by the limiting protrusion to left limit the safety knob; when the safety knob is rotated to the right connection mark, the positioning ball can be engaged in the limiting recess on the other side under the action of the spring to position the safety knob; and the other end of the limiting groove can be blocked by the limiting protrusion to right limit the safety knob.

[0008] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, the clamping and mounting mechanism comprises the following structure: a lower clamping plate located outside the front swing seat is provided on the upper end of the oscillating saw shaft; a through hole is provided in the oscillating saw shaft and the lower clamping plate; a pressure rod is movably inserted through the through hole of the oscillating saw shaft; an upper clamping plate is provided on the upper end of the pressure rod, which is located above the lower clamping plate; a base is threadedly connected to the lower end of the front swing seat, and sealant is applied to the threaded connection between the two; the lower end of the pressure rod extends into the base; a tensioning sleeve is threadedly connected to the lower end of the pressure rod; and a tensioning sleeve is fitted on the outer side of the tensioning sleeve. The device is equipped with a pressure sleeve. An upper thrust washer is located on the top of the inner wall of the pressure sleeve, and a lower thrust washer is located on the bottom of the outer wall of the tensioning sleeve. A ball bearing is installed between the upper and lower thrust washeres, ensuring that the pressure sleeve can rotate with the swing saw shaft without obstructing the tensioning sleeve when pressed by the two thrust washeres and the ball bearings. A lower support cap is threaded into the bottom opening of the pressure sleeve, supporting the tensioning sleeve as the pressure sleeve moves upward. Guide blocks are located on both sides of the pressure sleeve, and two guide grooves are provided in the base. The two guide blocks are located in the two guide grooves respectively and are guided by their respective guides. The groove provides vertical guidance. A nut collar is fitted onto the outside of the pressure sleeve and threadedly connected to two guide blocks. An outer knob is rotatably fitted onto the outside of the nut sleeve. A lower cap is threaded onto the lower end of the base. The base and lower cap provide axial positioning of the outer knob and nut sleeve. A lower deflector ring is located on the lower part of the outer wall of the nut sleeve, and an upper deflector ring is located on the upper part of the inner wall of the outer knob. An annular cavity exists between the upper and lower deflector rings. A torsion spring is placed in the annular cavity, with one end inserted into the upper deflector ring and the other end inserted into the lower deflector ring. This allows the outer knob to rotate under external force. The nut sleeve is driven to rotate by a torsion spring. After the nut sleeve rotates, it drives two guide blocks to move up and down with the pressure sleeve and the lower support cap. When the external knob is rotated in the forward direction by external force, the pressure sleeve will descend, and the lower support cap will support the tension sleeve, pressure rod, and upper clamping plate to descend, so that the upper clamping plate and the lower clamping plate can clamp the rear end of the saw blade. Then, the pressure sleeve continues to descend and presses the tension sleeve, so that the upper clamping plate and the lower clamping plate can clamp the rear end of the saw blade. When the external knob is rotated in the reverse direction by external force, the pressure sleeve will rise, and the lower support cap will support the tension sleeve, pressure rod, and upper clamping plate to rise, so that the upper clamping plate and the lower clamping plate can release the saw blade.

[0009] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, a locking spring is also provided on the base. The locking spring is located above the nut sleeve. When the external knob is driven to rotate forward by external force until the two clamping plates are clamped, the locking spring can prevent the nut sleeve from loosening by being pressed and deformed by the nut sleeve. This ensures that the nut sleeve can only be driven to rotate in the reverse direction by external force overcoming the frictional resistance.

[0010] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, an annular toothed surface is provided on the base above the outer knob. The lower surface of the annular toothed surface is provided with teeth. A spring groove is provided on the outer knob, in which a spring and a steel ball are placed. The steel ball abuts against the teeth on the annular toothed surface under the push of the spring. When the outer knob rotates, the steel ball will always abut against the teeth on the annular toothed surface and move along the annular toothed surface. After the steel ball and the teeth abut against each other, they can apply a rotational resistance to the outer knob, so that the outer knob cannot rotate freely without the action of external force.

[0011] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, the upper surface of the lower clamping plate is provided with several mounting bosses, and the rear end of the saw blade is provided with mounting holes corresponding to each mounting boss. The rear end of the saw blade can be inserted into each mounting hole for positioning through each mounting boss. A circular groove is provided on the lower end face of the upper clamping plate to avoid each mounting boss. The circular groove does not prevent the upper clamping plate from pressing the saw blade. The cross-section of the mounting boss is tapered, wider at the bottom and narrower at the top, so that the mounting holes on the saw blade can still fit tightly with the mounting boss even after wear and expansion.

[0012] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery also includes a battery guide sleeve that can be fitted onto the bottom opening of the handle housing. When the battery pack assembly is inserted, it can be guided by the battery guide sleeve so that the battery pack assembly can be smoothly inserted into the handle housing without contacting the end face of the bottom opening of the handle housing.

[0013] Furthermore, in the aforementioned reusable electric oscillating saw for orthopedic surgery, the cover plate has the following structure: a cover plate body, in which a turntable and limiting post are installed; a handle for driving the turntable to rotate is installed in a stepped hole on the outer surface of the cover plate body; blind holes for mounting are provided on the side wall of the handle, and steel balls and springs are placed in the blind holes; ball holes are provided on the side wall of the stepped hole of the cover plate body; and convex locking edges are provided on both sides of the turntable. When the handle is driven by external force to rotate the turntable forward to the locking position, the convex locking edges on both sides of the turntable can extend out from both sides of the cover plate body. The handle will be limited by the limiting post and cannot continue to rotate forward. The steel ball will be locked into the ball hole under the action of the spring to position the handle. When the handle is driven to rotate, the steel ball will be pressed back into the blind hole. When the handle is driven to rotate in the opposite direction to the unlock position by external force, the convex locking edges on both sides of the turntable can retract into the cover plate body. The turntable will be limited by the limiting post and cannot continue to rotate in the opposite direction. Locking grooves are provided on the inner walls of both sides of the bottom opening of the handle housing. After the cover plate is placed in the bottom opening of the handle housing, it can be locked in the opening by the two convex locking edges extending out and locking into the two locking grooves.

[0014] The advantages of this invention are as follows: the casing of the electric oscillating saw for orthopedic surgery is waterproof during high-temperature steam sterilization, preventing water damage to the motor. Furthermore, since the electrical components controlling the oscillating saw's operation are integrated into the battery pack, forming a battery pack assembly, the battery pack assembly is removed from the handle casing during sterilization. This effectively prevents water damage to the electrical components during sterilization. Therefore, the electric oscillating saw for orthopedic surgery can be repeatedly sterilized with high-temperature steam and reused. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the reusable electric oscillating saw for orthopedic surgery.

[0016] Figure 2 This is a schematic diagram of the handle base and handle shell.

[0017] Figure 3 This is a schematic diagram of the battery pack assembly.

[0018] Figure 4 This is a schematic diagram of the fuse switch assembly.

[0019] Figure 5 for Figure 1 A magnified structural diagram of point A in the middle.

[0020] Figure 6 This is an exploded view of the fuse switch assembly.

[0021] Figure 7 This is a schematic diagram showing the usage status of the battery guide sleeve.

[0022] Figure 8 This is a schematic diagram of the cover plate.

[0023] Figure 9 This is an exploded view of the cover plate.

[0024] Figure 10 This is a schematic diagram of the clamping and mounting mechanism.

[0025] Figure 11 for Figure 10 A schematic diagram of the structure of the central base.

[0026] Figure 12 for Figure 10 A schematic diagram of the tensioning sleeve.

[0027] Figure 13 for Figure 10 Schematic diagram of the intermediate pressure sleeve.

[0028] Figure 14 for Figure 10 A schematic diagram of the structure of the middle nut sleeve.

[0029] Figure 15 for Figure 10 A schematic diagram of the structure of the inner and outer knobs. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0031] like Figure 1 , Figure 2 , Figure 3As shown, a reusable electric oscillating saw for orthopedic surgery includes: a front swing base 1, a housing 30, a handle base 31, a handle housing 32, and a battery pack assembly 33. A motor 34 is installed in the housing 30. The front swing base 1 is fixedly connected to the front end of the housing 30. The oscillating saw shaft 2 is rotatably and vertically mounted in the front swing base 1 via bearings. The upper and lower ends of the oscillating saw shaft 2 extend out of the front swing base 1. The saw blade 28 is detachably mounted on the upper end of the oscillating saw shaft 2 via a clamping mechanism. The oscillating saw shaft 2 is driven to rotate back and forth by the motor 34 in the housing 30, allowing the saw blade 28 to oscillate and cut under the drive of the oscillating saw shaft 2. Typically, a rotating shaft is installed in the housing 30, and the motor 34 drives the rotating shaft to rotate. A mounting bracket is provided at the front end of the rotating shaft. An eccentric wheel is present, and a swing arm is also installed in the front swing base 1. The front end of the swing arm is engaged with the swing saw shaft, and a swing groove is provided on the rear end of the swing arm. The eccentric wheel is located in the swing groove. After the rotating shaft rotates, the eccentric wheel can drive the swing arm to swing left and right through the swing groove. After the swing arm swings left and right, it can drive the swing saw shaft 2 to rotate back and forth. A wire hole 35 is provided on the bottom of the tube shell 30. The handle base 31 is installed on the outside of the wire hole 35 by screws. A main plug 36 is provided in the handle base 31. The positive and negative terminals of the motor 34 are connected to the main plug 36 through the power supply circuit passing through the wire hole 35. The upper end of the handle shell 32 is fitted onto the outside of the handle base 31 and fixed to the handle base 31. The battery pack assembly 33 can be inserted and removed from the bottom opening of the handle shell 32. The battery pack assembly 33 is inserted into the handle housing 32. A removable cover plate 37 is installed on the bottom opening of the handle housing 32. The battery pack assembly 33 is provided with an auxiliary plug 38 and a power button 39. The auxiliary plug 38 and the main plug 36 can be connected after the battery pack assembly 33 is inserted. A start button 40 is provided on the front end of the handle base 31, which can be manually pressed. By pressing the start button 40, the power button 39 on the battery pack assembly 33 inserted into the handle housing 32 can be pressed. After the power button 39 is pressed, the battery pack assembly 33 starts to supply power. The power is transmitted to the motor 34 through the two connected plugs and the power supply circuit. The motor 34 starts to work after receiving power. The rear port of the housing 30 is sealed. The connection between the front swing base 1 and the tube shell 30 is sealed with a sealing ring; the gaps between the upper and lower parts of the swing saw shaft 2 and the front swing base 1 are sealed with sealing rings; and the wire threading port 35 is sealed with glue after the wire is threaded. The above-mentioned sealing structure makes the tube shell 30 waterproof during the high-temperature steam sterilization of the swing saw, preventing water from entering and damaging the motor. In addition, since the electrical components that control the opening of the swing saw are integrated into the battery pack to form a battery pack assembly 33, the battery pack assembly 33 is removed from the handle shell 32 during the sterilization of the electric swing saw. Thus, by setting the battery pack assembly 33, the electrical components can be effectively prevented from being damaged by water during sterilization. Therefore, the electric swing saw for orthopedic surgery can be repeatedly sterilized with high-temperature steam and reused.

[0032] In this embodiment, as Figure 4 , Figure 5 , Figure 6 As shown, a safety switch assembly 41 is also provided. The safety switch assembly 41 is installed in the rear port of the casing 30, and a sealing ring seals the installation gap at the rear port of the casing 30. The safety switch assembly 41 is connected to the power supply circuit between the motor 34 and the main plug 36. The safety switch assembly 41 can be manually operated from the outside. The on / off state of the power supply circuit can be controlled by the safety switch assembly 41. The motor 34 can only start working after the battery pack assembly 33 is powered on and the power supply circuit is connected through the safety switch assembly 41. The installation of the safety switch assembly 41 makes the use of the oscillating saw safer.

[0033] The structure of the safety switch assembly 41 includes: a circular knob housing 42, a knob base 43, and a rotating base 44, all installed in the rear port of the housing 30. The knob base 43 is inserted into the knob housing 42 and is coaxially arranged with the knob housing 42. The knob base 43 and the knob housing 42 are fixed together by screws. Four contact pieces 46 are inserted into the knob base 43, located at the top, bottom, left, and right of the knob base 43, respectively. The four contact pieces 46 are used to connect to the motor 34 and the main plug 36 via wires. In this embodiment, the motor 34... The positive and negative terminals are connected to the upper and lower contact pieces 46 respectively via wires, and the two connectors of the main plug 36 are connected to the left and right contact pieces 46 respectively via wires; the rotating base 44 is rotatably mounted in the knob base 43 and is arranged coaxially with the knob base 43. Two spring pieces 47 located inside the four contact pieces 46 are clamped on the outer wall of the rotating base 44. The two spring pieces 47 are located on the upper and lower sides of the rotating base 44 respectively. A safety knob 45 for driving its rotation is installed on the rotating base 44, and three markings are also provided, corresponding to the corresponding supply. The circuit is disconnected (marked by indicator 48), and the power supply circuit is connected (marked by indicators 49 and 50). Initially, the pointer on the safety knob 45 points to indicator 48, and the two spring plates 47 only make one-to-one contact with the upper and lower contact plates 46 respectively. After the safety knob 45 is rotated forward by external force, its pointer can point to indicator 49. After the safety knob 45 is rotated in the reverse direction by external force, its pointer can point to indicator 50. In this embodiment, when the pointer on the safety knob 45 points to indicator 49... The upper contact piece 46 and the right contact piece 46 can be connected by contacting the upper spring piece 47, and the lower contact piece 46 and the left contact piece 46 can be connected by contacting the lower spring piece 47, respectively. When the pointer on the safety knob 45 points to the right connection mark 50, the upper contact piece 46 and the left contact piece 46 can be connected by contacting the upper spring piece 47, and the lower contact piece 46 and the right contact piece 46 can be connected by contacting the lower spring piece 47, respectively.

[0034] In this embodiment, a limiting groove 51 and three limiting recesses 64 are provided on the knob seat 43. The rotating seat 44 is provided with a limiting protrusion 52 located in the limiting groove 51 and a ball-loading groove 53. A positioning ball 54 with elastic force provided by a spring is installed in the ball-loading groove 53. When the positioning ball 54 is pressed, it can compress the spring and return to the ball-loading groove 53 without hindering the rotation of the rotating seat 44. When the safety knob 45 is rotated to point to the disconnect mark 48, the positioning ball 54 can be locked into the middle limiting recess 64 under the action of the spring to position the safety knob 45. The safety knob 45 rotates. When the knob is rotated to point to the left connection mark 49, the positioning ball 54, under the action of the spring, can be inserted into the left limiting recess 64 to position the safety knob 45. The right end of the limiting groove 51 can block the limiting protrusion 52 to limit the safety knob 45 to the left. When the safety knob 45 is rotated to point to the right connection mark 50, the positioning ball 54, under the action of the spring, can be inserted into the right limiting recess 64 to position the safety knob 45. The left end of the limiting groove 51 can block the limiting protrusion 52 to limit the safety knob 45 to the right.

[0035] like Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15As shown, the clamping and mounting mechanism is structured as follows: a lower clamping plate 3 is provided on the upper end of the swing saw shaft 2, located outside the front swing seat 1. A through hole is provided in the swing saw shaft 2, vertically penetrating the swing saw shaft 2 and the lower clamping plate 3. A pressure rod 4 is movably inserted through the through hole of the swing saw shaft 2. An upper clamping plate 5 is provided on the upper end of the pressure rod 4, located above the lower clamping plate 3. A base 6 is threadedly connected to the lower end of the front swing seat 1. The lower end of the pressure rod 4 extends into the base 6. A tensioning sleeve 7 is threadedly connected to the lower end of the pressure rod 4. A pressure sleeve 8 is fitted on the outside of the tensioning sleeve 7. An upper thrust washer 9 is provided on the top of the inner wall of the pressure sleeve 8. A lower thrust washer 1 is provided on the bottom of the outer wall of the tensioning sleeve 7. 0. A ball bearing 11 is installed between the upper thrust washer 9 and the lower thrust washer 10, so that when the pressure sleeve 8 presses the tension sleeve 7 through the two thrust washers and the ball bearing 11, it does not hinder the tension sleeve 7 from rotating back and forth with the swing saw shaft 2. A lower support cap 12 is threaded into the bottom opening of the pressure sleeve 8. When the pressure sleeve 8 moves upward, it can lift the tension sleeve 7 through the lower support cap 12. Guide blocks 13 are respectively provided on both sides of the pressure sleeve 8. Two guide grooves 14 are provided in the base 6. The two guide blocks 13 are located in the two guide grooves 14 respectively and are vertically guided by the guide grooves 14 respectively. The nut sleeve 15 is sleeved on the outside of the pressure sleeve 8 and is threaded to the two guide blocks 13 respectively. The outer knob 16 is rotatably fitted onto the outside of the nut sleeve 15. A lower cap 17 is threaded onto the lower end of the base 6. The base 6 and the lower cap 17 can axially limit the outer knob 16 and the nut sleeve 15. A lower deflector ring 18 is provided on the lower part of the outer wall of the nut sleeve 15, and an upper deflector ring 19 is provided on the upper part of the inner wall of the outer knob 16. An annular cavity is left between the upper deflector ring 19 and the lower deflector ring 18. A torsion spring 20 is placed in the annular cavity. One end of the torsion spring 20 is inserted into the upper deflector ring 19, and the other end of the torsion spring 20 is inserted into the lower deflector ring 18, so that when the outer knob 16 is driven to rotate by an external force, it can drive the nut sleeve 15 to rotate through the torsion spring 20. After the female sleeve 15 rotates, it can drive the two guide blocks 13 to move the pressure sleeve 8 and the lower support cap 12 up and down. After the external force drives the outer knob 16 to rotate in the forward direction, the pressure sleeve 8 will descend, and the lower support cap 12 will support the tension sleeve 7, the pressure rod 4, and the upper clamping plate 5 to descend, so that the upper clamping plate 5 and the lower clamping plate 3 can clamp the rear end of the saw blade 28. Then, after the pressure sleeve 8 continues to descend, it can press the tension sleeve 7, so that the upper clamping plate 5 and the lower clamping plate 3 can clamp the rear end of the saw blade 28. After the external force drives the outer knob 16 to rotate in the reverse direction, the pressure sleeve 8 will rise, and the lower support cap 12 will support the tension sleeve 7, the pressure rod 4, and the upper clamping plate 5 to rise, so that the upper clamping plate 5 and the lower clamping plate 3 can release the saw blade 28.

[0036] The clamping and mounting mechanism drives the nut sleeve 15 to rotate via the external knob 16. After the nut sleeve 15 rotates, it drives the pressure sleeve 8 to press the tension sleeve 7. A ball bearing 11 is installed between the pressure sleeve 8 and the tension sleeve 7, so that the pressure sleeve 8 does not affect the operation of the saw blade when it presses. After the pressure sleeve 8 presses the tension sleeve 7 and the pressure rod 4, it can only be depressurized by driving the external knob 16 to rotate the nut sleeve 15. Therefore, without external force to drive the external knob 16 to rotate, the upper clamping plate 5 cannot be pried up by external force acting on the saw blade. Thus, the clamping and mounting mechanism can reliably clamp the saw blade.

[0037] The top of the nut sleeve 15 is blocked and limited, so that after the nut sleeve 15 rotates, it can drive the pressure sleeve 8 to move downward to press the tension sleeve 7. After the two clamping plates clamp the saw blade, the top of the nut sleeve 15 will be limited and locked under the action of the reaction force. In order to prevent the outer knob 16 from being pulled up by the nut sleeve 15 and abutting against the base 6 and getting stuck, the outer knob 16 and the nut sleeve 15 are not directly fixed and driven, but a torsion spring 20 is used for transmission. In this way, after the nut sleeve 15 is limited and locked, the outer knob 16 can still rotate normally.

[0038] In this embodiment, a locking spring 21 is also provided on the base 6. The locking spring 21 is located above the nut sleeve 15. After the external knob 16 is rotated clockwise by external force until the two clamping plates are clamped, the locking spring 21 can prevent the nut sleeve 15 from loosening by being pressed and deformed by the nut sleeve 15. This ensures that the nut sleeve 15 can only be driven to rotate in the opposite direction by external force overcoming the frictional resistance. This arrangement can effectively reduce the impact of the electric swing saw's operating vibration on the nut sleeve 15.

[0039] An annular toothed surface 22 is also provided on the base 6 above the outer knob 16. The lower surface of the annular toothed surface 22 is provided with teeth. A spring groove 23 is provided on the outer knob 16. A spring and a steel ball 25 are placed in the spring groove 23. The steel ball 25 abuts against the teeth on the annular toothed surface 22 under the push of the spring. When the outer knob 16 rotates, the steel ball 25 will always abut against the teeth on the annular toothed surface 22 and move along the annular toothed surface 22. After the steel ball 25 abuts against the teeth, it can apply a rotational resistance to the outer knob 16, so that the outer knob 16 cannot rotate freely without the action of external force.

[0040] The two opposite end faces of the upper thrust washer 9 and the lower thrust washer 10 are respectively set as spherical arc surfaces that can cooperate with the ball bearing 11, which makes the rotation smoother.

[0041] A fixing screw 26, which is screwed into the lower end of the clamping rod 4, is screwed into the tensioning sleeve 7. An anti-loosening screw 27, which is screwed into the lower end of the clamping base 6, is screwed into the lower cap 17. This arrangement is to ensure that the tensioning sleeve 7 and the lower cap 17 can be locked in place during operation and will not loosen.

[0042] Several mounting bosses 24 are provided on the upper surface of the lower clamping plate 3. The rear end of the saw blade 28 is provided with mounting holes corresponding to each mounting boss 24. The rear end of the saw blade 28 can be inserted into each mounting hole through each mounting boss 24 for positioning. A circular groove 29 is provided on the lower end face of the upper clamping plate 5 to avoid each mounting boss 24. The circular groove 29 does not prevent the upper clamping plate 5 from pressing the saw blade 28. The cross-section of the mounting boss 24 is a tapered shape that is wider at the bottom and narrower at the top, so that the mounting holes on the saw blade 28 can still fit tightly with the mounting boss 24 even after wear and expansion.

[0043] To facilitate the installation of the battery pack assembly 33 and to prevent the battery pack assembly 33 from contacting and contaminating the handle housing 32, such as Figure 7 As shown, a battery guide sleeve 62 is also provided, which can be fitted onto the bottom opening of the handle housing 32. When the battery pack assembly 33 is inserted, it can be guided by the battery guide sleeve 62, so that the battery pack assembly 33 can be smoothly inserted into the handle housing 32 without touching the bottom opening end face of the handle housing 32.

[0044] like Figure 8 , Figure 9 As shown, the structure of the cover plate 37 is as follows: a cover plate body 55, in which a turntable 56 and a limiting post 57 are installed; a handle 58 for driving the turntable 56 to rotate is installed in a stepped hole on the outer surface of the cover plate body 55; a blind hole is provided on the side wall of the handle 58, in which a steel ball 59 and a spring are placed; a ball hole 60 is provided on the side wall of the stepped hole of the cover plate body 55; and protruding locking edges 61 are provided on both sides of the turntable 56. When the handle 58 is driven by external force to rotate the turntable 56 forward to the locked position, the protruding locking edges 61 on both sides of the turntable 56 can extend out of both sides of the cover plate body 55, and the turntable 56 will be limited by the limiting post 57. Unable to continue rotating forward, the steel ball 59, under the action of the spring, will be stuck into the ball hole 60 to position the handle 58. When the handle 58 is driven to rotate, the steel ball 59 will be pressed back into the blind hole. When the handle 58 is driven to rotate in the opposite direction to the unlock position by external force, the protruding locking edges 61 on both sides of the turntable 56 can retract into the cover body 55 respectively. The turntable 56 will be limited by the limiting post 57 and will not be able to continue rotating in the opposite direction. Locking grooves 63 are respectively provided on the inner walls of both sides of the bottom opening of the handle housing 32. After the cover plate 37 is placed in the bottom opening of the handle housing 32, it can be extended by the two protruding locking edges 61 and locked into the two locking grooves 63 to lock the cover in the opening.

Claims

1. A reusable electric oscillating saw for orthopedic surgery, characterized in that: include: The system comprises a front swing mount, a tube housing, a handle base, a handle housing, and a battery pack assembly. A motor is installed within the tube housing. The front swing mount is fixedly connected to the front end of the tube housing. The oscillating saw shaft is vertically mounted in the front swing mount via bearings, with its upper and lower ends extending out. The saw blade is detachably mounted on the upper end of the oscillating saw shaft via a clamping mechanism. The oscillating saw shaft is driven to rotate back and forth by the motor in the tube housing, allowing the saw blade to swing and cut under its influence. A cable pass-through port is located at the bottom of the tube housing. The handle housing is screwed to the outside of this port. A main plug is located within the handle housing. The positive and negative terminals of the motor are connected to the main plug via a power supply circuit passing through the cable pass-through port. The upper end of the handle housing is fitted over the outside of the handle housing and fixed thereto. The battery pack assembly is removable through an opening at the bottom of the handle housing. The main and auxiliary plugs are inserted into the handle housing. A removable cover plate is installed on the bottom opening of the handle housing. The battery pack assembly is equipped with an auxiliary plug and a power button. The auxiliary plug and the main plug can be connected after the battery pack assembly is inserted. A start button that can be manually pressed is located on the front of the handle base. By pressing the start button, the power button on the battery pack assembly inserted into the handle housing can be pressed. After the power button is pressed, the battery pack assembly starts to supply power. The power is transmitted to the motor through the two connected plugs and the power supply circuit. The motor starts to work after being powered on. The rear port of the tube housing is sealed, the joint between the front swing seat and the tube housing is sealed with a sealing ring, the gaps between the upper and lower parts of the swing saw shaft and the front swing seat are sealed with sealing rings, and the wire threading port is sealed with glue after the wire is threaded.

2. The reusable electric oscillating saw for orthopedic surgery according to claim 1, characterized in that: A safety switch assembly is also provided. The safety switch assembly is installed in the rear port of the housing. The installation gap at the rear port of the housing is sealed by a sealing ring. The safety switch assembly is connected to the power supply circuit between the motor and the main plug. The safety switch assembly can be manually operated from the outside. The on / off of the power supply circuit can be controlled by the safety switch assembly. The motor can only start working after the battery pack assembly starts to supply power and the power supply circuit is connected through the safety switch assembly.

3. The reusable electric oscillating saw for orthopedic surgery according to claim 2, characterized in that: The structure of the safety switch assembly includes: a circular knob housing, a knob base, and a rotating base, all installed in the rear port of the housing. The knob base is inserted into the knob housing and arranged coaxially with it. The knob base and knob housing are fixed together by screws. Four contact pieces are inserted into the knob base, located at the top, bottom, left, and right of the knob base respectively. These four contact pieces are used to connect to the motor and main plug via wires. The rotating base is rotatably installed in the knob base and arranged coaxially with it. Two spring plates located inside the four contact pieces are fitted onto the outer wall of the rotating base, located at the top and bottom of the rotating base respectively. A safety knob for driving its rotation is installed on the rotating base. There are three indicators: a disconnection indicator for a broken power supply circuit, a left connection indicator for a connected power supply circuit, and a right connection indicator. Initially, the pointer on the safety knob points to the disconnection indicator, and the two spring plates only make one-to-one contact with the upper and lower contact plates. After the safety knob is rotated clockwise by external force, its pointer can point to the left connection indicator. After the safety knob is rotated counterclockwise by external force, its pointer can also point to the right connection indicator. When the pointer on the safety knob points to the connection indicator, the upper contact plate and the contact plate on one side can be connected by contacting the upper spring plate, and at the same time, the lower contact plate and the contact plate on the other side can be connected by contacting the lower spring plate.

4. The reusable electric oscillating saw for orthopedic surgery according to claim 3, characterized in that: The knob base is provided with a limiting groove and three limiting recesses. The rotating base is provided with a limiting protrusion located in the limiting groove and a ball-loading groove. A positioning ball with elastic force provided by a spring is installed in the ball-loading groove. When the positioning ball is pressed, it can compress the spring and retract into the ball-loading groove without hindering the rotation of the rotating base. When the safety knob is rotated to the point of disconnection, the positioning ball can be locked into the middle limiting recess under the action of the spring to position the safety knob. When the safety knob is rotated to the point of left connection, the positioning ball can be locked into the limiting recess on one side under the action of the spring to position the safety knob. Moreover, one end of the limiting groove can limit the safety knob to the left by blocking the limiting protrusion. When the safety knob is rotated to the point of right connection, the positioning ball can be locked into the limiting recess on the other side under the action of the spring to position the safety knob. Moreover, the other end of the limiting groove can limit the safety knob to the right by blocking the limiting protrusion.

5. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3, or 4, characterized in that: The clamping and mounting mechanism is structured as follows: a lower clamping plate is located on the outer side of the front swing seat at the upper end of the swing saw shaft; a through hole is provided in the swing saw shaft, penetrating both the swing saw shaft and the lower clamping plate; a pressure rod is movably inserted through the through hole of the swing saw shaft; an upper clamping plate is provided on the upper end of the pressure rod, positioned above the lower clamping plate; a base is threadedly connected to the lower end of the front swing seat, and sealant is applied to the threaded connection between the two; the lower end of the pressure rod extends into the base; a tensioning sleeve is threadedly connected to the lower end of the pressure rod; a pressure sleeve is fitted on the outer side of the tensioning sleeve; and an upper stop is provided on the top of the inner wall of the pressure sleeve. The push pad has a lower thrust pad on the bottom of the outer wall of the tensioning sleeve. A ball bearing is installed between the upper and lower thrust pads, ensuring that the pressure sleeve can rotate with the swing saw shaft without obstructing the tensioning sleeve when pressed by the two thrust pads and the ball bearings. A lower support cap is threaded into the bottom opening of the pressure sleeve, supporting the tensioning sleeve as it moves upward. Guide blocks are provided on both sides of the pressure sleeve, and two guide grooves are provided in the base. The two guide blocks are located in the two guide grooves and are vertically guided by their respective grooves. The nut collar is fitted onto... The outer side of the pressure sleeve is threadedly connected to two guide blocks respectively. The outer knob is rotatably fitted onto the outer side of the nut sleeve. A lower cap is threadedly connected to the lower end of the base. The base and the lower cap can axially limit the outer knob and the nut sleeve. A lower deflector ring is provided on the lower part of the outer wall of the nut sleeve, and an upper deflector ring is provided on the upper part of the inner wall of the outer knob. An annular cavity is left between the upper and lower deflector rings. A torsion spring is placed in the annular cavity. One end of the torsion spring is inserted into the upper deflector ring, and the other end of the torsion spring is inserted into the lower deflector ring, so that when the outer knob is driven to rotate by external force, it can drive the screw through the torsion spring. When the female sleeve rotates, the nut sleeve rotates, which drives the two guide blocks to move the pressure sleeve and the lower support cap up and down. When the external knob is rotated forward by external force, the pressure sleeve will descend, and the lower support cap will support the tension sleeve, pressure rod, and upper clamping plate to descend, so that the upper clamping plate and the lower clamping plate can clamp the rear end of the saw blade. Then, when the pressure sleeve continues to descend, it can press the tension sleeve, so that the upper clamping plate and the lower clamping plate can clamp the rear end of the saw blade. When the external knob is rotated in the opposite direction by external force, the pressure sleeve will rise, and the lower support cap will support the tension sleeve, pressure rod, and upper clamping plate to rise, so that the upper clamping plate and the lower clamping plate can release the saw blade.

6. The reusable electric oscillating saw for orthopedic surgery according to claim 5, characterized in that: A locking spring is also provided on the base. The locking spring is located above the nut sleeve. When the external knob is driven to rotate forward by external force until the two clamping plates are clamped, the locking spring can prevent the nut sleeve from loosening by being pressed and deformed by the nut sleeve. This means that the nut sleeve can only be driven to rotate in the opposite direction by external force to overcome the frictional resistance.

7. The reusable electric oscillating saw for orthopedic surgery according to claim 5, characterized in that: An annular toothed surface is also provided on the base above the outer knob. The lower surface of the annular toothed surface is provided with teeth. A spring groove is provided on the outer knob, in which a spring and a steel ball are placed. The steel ball abuts against the teeth on the annular toothed surface under the push of the spring. When the outer knob rotates, the steel ball will always abut against the teeth on the annular toothed surface and move along the annular toothed surface. After the steel ball and the teeth abut against each other, they can apply a rotational resistance to the outer knob, so that the outer knob cannot rotate freely without the action of external force.

8. The reusable electric oscillating saw for orthopedic surgery according to claim 5, characterized in that: The upper surface of the lower clamping plate is provided with several mounting bosses. The rear end of the saw blade is provided with mounting holes that correspond one-to-one with each mounting boss. The rear end of the saw blade can be inserted into each mounting hole for positioning through each mounting boss. The lower end face of the upper clamping plate is provided with a circular groove to avoid each mounting boss. The circular groove does not prevent the upper clamping plate from pressing the saw blade. The cross-section of the mounting boss is a cone shape that is wider at the bottom and narrower at the top, so that the mounting holes on the saw blade can still fit tightly with the mounting boss even after wear and expansion.

9. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3, or 4, characterized in that: It also features a battery guide sleeve that can be fitted onto the bottom opening of the handle housing. When the battery pack assembly is inserted, it can be guided by the battery guide sleeve, so that the battery pack assembly can be smoothly inserted into the handle housing without touching the bottom opening end face.

10. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3, or 4, characterized in that: The cover plate has the following structure: a cover plate body, in which a turntable and a limiting post are installed; a handle for driving the turntable to rotate is installed in a stepped hole on the outer surface of the cover plate body; a blind hole for mounting is provided on the side wall of the handle, and a steel ball and a spring are placed in the blind hole; a ball hole is provided on the side wall of the stepped hole of the cover plate body; and convex locking edges are provided on both sides of the turntable. When the handle is driven by external force to rotate the turntable forward to the locking position, the convex locking edges on both sides of the turntable can extend out from both sides of the cover plate body, and the turntable will be limited by the limiting post and cannot continue. As the handle continues to rotate forward, the steel ball, under the action of the spring, will be inserted into the ball hole to position the handle. When the handle is driven to rotate, the steel ball will be pressed back into the blind hole. When the handle is driven to rotate in the opposite direction to the unlocked position by external force, the convex locking edges on both sides of the handle can retract into the cover body, and the handle will be limited by the limiting post and will not be able to continue to rotate in the opposite direction. Locking grooves are provided on the inner walls on both sides of the bottom opening of the handle housing. After the cover plate is placed in the bottom opening of the handle housing, it can be locked in the opening by extending through the two convex locking edges and engaging in the two locking grooves.

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