Orthopedic surgery electric swing saw capable of being repeatedly used

Abstract

The reusable electric swing saw comprises a front swing seat, a tube shell, a handle seat, a handle shell and a battery pack assembly, the front swing seat is in butt joint with a front end opening of the tube shell, a swing saw shaft is vertically installed in the front swing seat, a saw blade is installed at the upper end of the swing saw shaft through a clamping installation mechanism, a threading opening is formed in the bottom of the tube shell, and the handle seat and the handle shell are arranged in the threading opening. The handle seat is installed on the outer side of the threading opening, a main plug is arranged in the handle seat, the motor is connected with the main plug through a power supply circuit penetrating through the threading opening, the handle seat is sleeved with the upper end of the handle shell, the battery pack assembly is inserted into the handle shell from an opening in the bottom of the handle shell, and a sealing cover plate is installed on the opening in the bottom of the handle shell. The battery pack assembly is provided with an auxiliary plug and a power supply button, the auxiliary plug and the main plug can be communicated in a butt joint mode, a starting button is arranged at the front end of the handle seat, and the power supply button can be pressed by pressing the starting button so as to seal the tube shell. The electric swing saw for the orthopedic surgery can be repeatedly disinfected by high-temperature steam and can be repeatedly used.

Description

Technical Field

[0001] The present invention relates to the field of medical electric tools, in particular to a reusable electric oscillating saw for orthopedic surgery. Background Art

[0002] Orthopedic electric oscillating saws are used in orthopedic and trauma surgeries, including artificial joint replacement, arthroscopic surgery, joint resection and reconstruction surgery, synovectomy, orthopedic plastic surgery, other joint surgeries, and tumor surgery. Oscillating saws have a wide range of applications and complex methods, and their performance and operation must meet the needs of various surgeries. Due to structural reasons, the electric oscillating saws currently on the market cannot effectively protect the electronic components and motors during high-temperature steam sterilization. These components and motors are easily damaged by water, so they are usually disinfected only by wiping the outer surface of the electric oscillating saw with alcohol. As a result, existing electric oscillating saws for orthopedic surgery cannot be effectively disinfected after a few uses and must be discarded. There is an urgent need for an electric oscillating saw for orthopedic surgery that can be repeatedly sterilized with high-temperature steam and is reusable. Summary of the Invention

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

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a reusable electric oscillating saw for orthopedic surgery, characterized in that: it includes: a front oscillating seat, a tube shell, a handle seat, a handle shell, and a battery pack assembly. A motor is installed in the tube shell, and the front oscillating seat is fixed relative to the front end of the tube shell. The oscillating saw shaft is rotatably installed vertically in the front oscillating seat through a bearing. The upper and lower ends of the oscillating saw shaft extend out of the front oscillating seat respectively, and the saw blade is detachably installed on the upper end of the oscillating saw shaft through a clamping mounting mechanism. The oscillating saw shaft is driven to rotate back and forth by the motor in the tube shell, so that the saw blade can swing and saw under the drive of the oscillating saw shaft. A threading port is opened on the bottom of the tube shell, and the handle seat is installed on the outside of the threading port by screws. A main plug is provided in the handle seat, and the positive and negative poles of the motor are connected to the main plug through the power supply circuit passing through the threading port. The upper end of the handle shell is sleeved on the outside of the handle seat, and is connected to the The handle seat is fixed, and the battery pack assembly can be plugged into the handle shell from the bottom opening of the handle shell. A removable cover plate is installed on the bottom opening of the handle shell. The battery pack assembly is provided with an auxiliary plug and a power supply button. The auxiliary plug and the main plug can be connected to each other after the battery pack assembly is installed. A start button exposed to the outside and can be pressed manually is provided on the front end of the handle seat. By pressing the start button, the power button on the battery pack assembly inserted in the handle shell can be pressed. The battery pack assembly starts to supply power after the power button is pressed, and the electric energy is transmitted to the motor through the two relatively connected plugs and the power supply circuit. The motor starts to work after it is energized; the rear port of the tube shell is sealed, the joint between the front swing seat and the tube shell 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 respectively, and the threading port is sealed with glue after the threading is completed.

[0005] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: a safety switch assembly is also provided, the safety switch assembly is installed in the rear port of the tube shell, the installation gap of the rear port of the tube shell 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 and off of the power supply circuit can be controlled by the safety switch assembly, and the motor can only start working after the battery pack assembly starts supplying power and the power supply circuit is connected through the safety switch assembly.

[0006] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: the structure of the safety switch assembly includes: a circular knob shell installed in the rear port of the tube shell, a knob seat, and a rotating seat, the knob seat is inserted into the knob shell and is coaxially arranged with the knob shell, the knob seat and the knob shell are fixed by screws, four contact pieces are inserted into the knob seat, the four contact pieces are respectively located at the upper, lower, left and right sides of the knob seat, the four contact pieces are used to be connected to the motor and the main plug through wires, the rotating seat is rotatably installed in the knob seat, and is coaxially arranged with the knob seat, two spring pieces located inside the four contact pieces are clamped on the outer wall of the rotating seat, the two spring pieces are respectively located at the upper and lower sides of the rotating seat, and a The safety knob used to drive its rotation is also provided with three marks, namely the disconnect mark corresponding to the disconnection of the power supply circuit, the left connection mark corresponding to the connection of the power supply circuit, and the right connection mark. Initially, the pointer on the safety knob points to the disconnect mark, and the two spring pieces only contact the upper and lower contact pieces one-to-one respectively; after the safety knob is driven by external force to rotate forward, the pointer on it can point to the left connection mark, and after the safety knob is driven by external force to rotate reversely, the pointer on it can also point to the right connection mark. When the pointer on the safety knob points to the connection mark, the upper contact piece and the contact piece on one side can be connected by contacting the upper spring piece respectively, and at the same time, the lower contact piece and the contact piece on the other side can be connected by contacting the lower spring piece respectively.

[0007] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: a limiting long groove and three limiting recessed holes are provided on the knob seat, a limiting protrusion and a ball loading groove located in the limiting long groove are provided on the rotating seat, a positioning ball provided with elastic force by a spring is installed in the ball loading groove, and the positioning ball can compress the spring and return to the ball loading groove after being pressed without hindering the rotation of the rotating seat, when the safety knob is rotated to point to the disconnection mark, the positioning ball can be clamped into the middle limiting recessed hole under the action of the spring to position the safety knob, when the safety knob is rotated to point to the left connection mark, the positioning ball can be clamped into the limiting recessed hole on one side under the action of the spring to position the safety knob, and one end of the limiting long groove can limit the safety knob to the left by blocking the limiting protrusion, and when the safety knob is rotated to point to the right connection mark, the positioning ball can be clamped into the limiting recessed hole on the other side under the action of the spring to position the safety knob, and the other end of the limiting long groove can limit the safety knob to the right by blocking the limiting protrusion.

[0008] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: the structure of the clamping and mounting mechanism is as follows: a lower splint located on the outer side of the front oscillating seat is provided on the upper end of the oscillating saw shaft, a through hole vertically penetrating the oscillating saw shaft and the lower splint is provided in the oscillating saw shaft, a pressure rod is movably passed through the through hole of the oscillating saw shaft, an upper splint is provided on the upper end of the pressure rod, the upper splint is located above the lower splint, a base is threadedly connected to the lower end of the front oscillating seat, and sealing glue is applied at the threaded connection between the two, the lower end of the pressure rod extends into the base, and a tensioning sleeve is threadedly connected to the lower end of the pressure rod, and the tensioning sleeve is threaded on the outer side. The side sleeve is provided with a pressing sleeve, an upper thrust washer is provided on the top of the inner wall of the pressing sleeve, and a lower thrust washer is provided on the bottom of the outer wall of the tensioning sleeve. A ball is installed between the upper thrust washer and the lower thrust washer, so that when the pressing sleeve presses the tensioning sleeve through the two thrust washers and the ball, it will not hinder the tensioning sleeve from rotating back and forth with the swing saw shaft. A lower supporting cap is threadedly connected in the bottom opening of the pressing sleeve, and the tensioning sleeve can be supported by the lower supporting cap when the pressing sleeve moves upward. Guide blocks are respectively provided on both sides of the pressing sleeve, and two guide grooves are provided in the base. The two guide blocks are respectively located in the two guide grooves and are respectively affected by the guide blocks. The nut sleeve is sleeved on the outside of the pressing sleeve and is threadedly connected to the two guide blocks respectively. The outer knob is rotatably sleeved on the outside of the nut sleeve. A lower cover cap is threadedly connected to the lower end of the base. The base and the lower cover cap can axially limit the outer knob and the nut sleeve. A lower shift ring is provided on the lower part of the outer wall of the nut sleeve, and an upper shift 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 shift rings, and a torsion spring is placed in the annular cavity. One end of the torsion spring is inserted in the upper shift ring, and the other end of the torsion spring is inserted in the lower shift ring, so that the outer knob can be driven to rotate by external force. The nut sleeve is driven to rotate by the torsion spring, and the nut sleeve can drive the two guide blocks to move up and down with the pressure sleeve and the lower supporting cap after rotation. After the outer knob is driven by external force to rotate forward, the pressure sleeve will drop, and the lower supporting cap will support the tightening sleeve, the pressure rod, and the upper splint to drop, so that the upper splint and the lower splint can clamp the rear end of the saw blade, and then the pressure sleeve can continue to drop to press the tightening sleeve, so that the upper splint and the lower splint can clamp the rear end of the saw blade; after the outer knob is driven by external force to rotate reversely, the pressure sleeve will rise, and the lower supporting cap will support the tightening sleeve, the pressure rod, and the upper splint to rise, so that the upper splint and the lower splint can release the saw blade.

[0009] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: a locking spring is also provided on the base, and the locking spring is located above the nut sleeve. After the outer knob is driven by external force to rotate forward until the two splints are clamped, the locking spring can prevent the nut sleeve from loosening by being pressed and deformed by the nut sleeve, so that the nut sleeve can only be driven to rotate in the opposite direction after the friction resistance is overcome by external force.

[0010] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: an annular tooth surface is also provided on the base and located above the outer knob, the lower surface of the annular tooth surface is provided with teeth, a spring groove is provided on the outer knob, a spring and a steel ball are placed in the spring groove, the steel ball is pressed against the teeth on the annular tooth surface under the push of the spring, and when the outer knob rotates, the steel ball will always press against the teeth on the annular tooth surface and move along the annular tooth surface, and after the steel ball and the teeth press against each other, they can apply a rotational resistance to the outer knob, so that the outer knob cannot rotate freely without external force.

[0011] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: a plurality of mounting bosses are provided on the upper surface of the lower splint, and mounting holes corresponding to each mounting boss are provided on the rear end of the saw blade, and the rear end of the saw blade can be inserted into each mounting hole through each mounting boss for positioning, and a circular groove is provided on the lower end surface of the upper splint for avoiding each mounting boss, and the circular groove does not hinder the upper splint from pressing the saw blade, and the cross-section of the mounting boss is a cone that is wide at the bottom and narrow at the top, so that the mounting hole on the saw blade can still fit tightly with the mounting boss after it is worn and expanded.

[0012] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery is provided with a battery guide sleeve that can be clamped on the bottom opening of the handle shell. The battery pack assembly can be guided by the battery guide sleeve when inserted, so that the battery pack assembly does not touch the end face of the bottom opening of the handle shell and can be smoothly inserted into the handle shell.

[0013] Furthermore, the aforementioned reusable electric oscillating saw for orthopedic surgery, wherein: the structure of the cover plate is: a cover plate body, a turntable and a limit column are installed in the cover plate body, a rotary handle for driving the turntable to rotate is installed in the stepped hole on the outer surface of the cover plate body, a mounting blind hole is provided on the side wall of the rotary handle, a steel ball and a spring are placed in the mounting 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 respectively provided on both sides of the turntable. When the rotary 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 respectively extend out of the two sides of the cover plate body, and the turntable The disk will be limited by the limiting column and cannot continue to rotate forward. The steel ball will be stuck in 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 installation blind hole. When the handle is driven by external force to rotate the turntable in the opposite direction to the unlocked position, the convex locking edges on both sides of the turntable can be retracted into the cover plate body respectively, and the turntable will be limited by the limiting column and cannot continue to rotate in the opposite direction; locking grooves are respectively provided on the inner walls on both sides of the bottom opening of the handle shell; after the cover plate is placed in the bottom opening of the handle shell, it can be locked in the opening through the two convex locking edges.

[0014] The advantages of the present invention are as follows: the tube shell in the electric oscillating saw for orthopedic surgery can be well waterproof when the oscillating saw is sterilized with high-temperature steam, so that the motor will not be damaged by water. In addition, since the electrical components for controlling the start of the oscillating saw are integrated into the battery pack to form a battery pack assembly, the battery pack assembly will be removed from the handle shell when the electric oscillating saw is sterilized. Therefore, by providing the battery pack assembly, the electrical components can be effectively prevented from being damaged by water during disinfection. Therefore, the electric oscillating saw for orthopedic surgery can be repeatedly sterilized with high-temperature steam and used repeatedly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a structural diagram of the handle base and the handle shell.

[0017] Figure 3 A schematic diagram of the battery pack assembly.

[0018] Figure 4 It is a structural diagram of the safety switch assembly.

[0019] Figure 5 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 6 Exploded view of the safety switch assembly.

[0021] Figure 7 This is a schematic diagram of the battery guide sleeve in use.

[0022] Figure 8 Schematic diagram of the structure of the cover plate.

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

[0024] Figure 10 Schematic diagram of the structure of the clamping and mounting mechanism.

[0025] Figure 11 for Figure 10 Schematic diagram of the structure of the middle base.

[0026] Figure 12 for Figure 10 Schematic diagram of the structure of the middle tensioning sleeve.

[0027] Figure 13 for Figure 10 Schematic diagram of the structure of the medium voltage sleeve.

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

[0029] Figure 15 for Figure 10 Schematic diagram of the structure of the middle and outer knobs. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below 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 oscillating seat 1, a tube shell 30, a handle seat 31, a handle shell 32, and a battery pack assembly 33. A motor 34 is installed in the tube shell 30. The front oscillating seat 1 is fixedly connected to the front end of the tube shell 30. The oscillating saw shaft 2 is rotatably installed vertically in the front oscillating seat 1 through a bearing. The upper and lower ends of the oscillating saw shaft 2 extend out of the front oscillating seat 1 respectively. The saw blade 28 is detachably installed on the upper end of the oscillating saw shaft 2 through a clamping mounting mechanism. The oscillating saw shaft 2 is driven to rotate back and forth by the motor 34 in the tube shell 30, so that the saw blade 28 can swing and saw under the drive of the oscillating saw shaft 2. Usually, a rotating shaft is installed in the tube shell 30, and the motor 34 drives the rotating shaft to rotate. A device is provided on the front end of the rotating shaft. There is an eccentric wheel, and a rocker arm is also installed in the front rocker seat 1. The front end of the rocker arm is clamped with the rocker saw shaft, and a rocker slot is provided on the rear end of the rocker arm. The eccentric wheel is located in the rocker slot. After the rotating shaft rotates, the eccentric wheel can drive the rocker arm to swing left and right through the rocker slot. After the rocker arm swings left and right, it can drive the rocker saw shaft 2 to rotate back and forth; a threading port 35 is provided on the bottom of the tube shell 30, and the handle seat 31 is installed on the outside of the threading port 35 by screws. A main plug 36 is provided in the handle seat 31, and the positive and negative poles of the motor 34 are connected to the main plug 36 through the power supply circuit passing through the threading port 35. The upper end of the handle shell 32 is mounted on the outside of the handle seat 31 and is fixed to the handle seat 31. The battery pack assembly 33 is pluggable from the bottom opening of the handle shell 32. It is inserted into the handle shell 32, and a detachable cover plate 37 is installed on the bottom opening of the handle shell 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 to each other after the battery pack assembly 33 is inserted. A start button 40 exposed to the outside and capable of being pressed manually is provided on the front end of the handle seat 31. By pressing the start button 40, the power button 39 on the battery pack assembly 33 inserted in the handle shell 32 can be pressed. After the power button 39 is pressed, the battery pack assembly 33 starts to supply power, and the electric energy is transmitted to the motor 34 through the two relatively connected plugs and the power supply circuit. The motor 34 starts to work after being energized; the rear port of the tube shell 30 is sealed The joint between the front swing seat 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 seat 1 are sealed by sealing rings respectively, and the threading port 35 is sealed by glue after the threading is completed. The above-mentioned sealing structure allows the tube shell 30 to be well waterproof when the swing saw is sterilized with high-temperature steam, so that the motor will not be damaged by water. 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 will be removed from the handle shell 32 when the electric swing saw is sterilized. Therefore, by setting the battery pack assembly 33, the electrical components can be effectively avoided from being damaged by water during disinfection. Therefore, the electric swing saw for orthopedic surgery can be repeatedly sterilized with high-temperature steam and used repeatedly.

[0032] In this embodiment, if 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 tube housing 30. The installation gap of the rear port of the tube housing 30 is sealed by a sealing ring. 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 power supply circuit can be turned on and off by the safety switch assembly 41. The motor 34 can only start working after the battery pack assembly 33 starts supplying power and the power supply circuit is connected by the safety switch assembly 41. The installation of the safety switch assembly 41 makes the use of the swing saw safer.

[0033] The structure of the safety switch assembly 41 includes: a circular knob housing 42 installed in the rear port of the tube shell 30, a knob seat 43, and a rotating seat 44. The knob seat 43 is inserted into the knob housing 42 and is coaxially arranged with the knob housing 42. The knob seat 43 and the knob housing 42 are fixed by screws. Four contact pieces 46 are inserted into the knob seat 43. The four contact pieces 46 are respectively located at the top, bottom, left and right of the knob seat 43. The four contact pieces 46 are used to connect to the motor 34 and the main plug 36 through wires. In this embodiment, the motor 34 The positive and negative poles are connected to the upper and lower contact pieces 46 respectively through wires, and the two connectors of the main plug 36 are connected to the left and right contact pieces 46 respectively through wires; the rotating seat 44 is rotatably installed in the knob seat 43 and is coaxially arranged with the knob seat 43. Two spring pieces 47 located inside the four contact pieces 46 are clamped on the outer wall of the rotating seat 44. The two spring pieces 47 are located on the upper and lower sides of the rotating seat 44 respectively. A safety knob 45 for driving its rotation is installed on the rotating seat 44, and three marks are also provided, which correspond to the supply The disconnect mark 48 of the power circuit is disconnected, and the left connection mark 49 and the right connection mark 50 of the corresponding power supply circuit are connected. Initially, the pointer on the safety knob 45 points to the disconnect mark 48, and the two spring pieces 47 only make one-to-one contact with the upper and lower contact pieces 46 respectively; after the safety knob 45 is driven by external force to rotate forward, the pointer on it can point to the left connection mark 49, and after the safety knob 45 is driven by external force to rotate reversely, the pointer on it can also point to the right connection mark 50. In this embodiment, when the pointer on the safety knob 45 points to the left connection mark 49, , the upper contact piece 46 and the right contact piece 46 can be connected by contacting the upper spring piece 47 respectively, 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 respectively, 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 limited long groove 51 and three limited recessed holes 64 are provided on the knob seat 43. A limited protrusion 52 and a ball-loading groove 53 are provided on the rotating seat 44. A positioning ball 54 with elastic force provided by a spring is installed in the ball-loading groove 53. After the positioning ball 54 is pressed, the spring can be compressed and returned 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 stuck in the middle of the limited recessed hole 64 under the action of the spring to position the safety knob 45. The safety knob 45 is rotated When it points to the left connection mark 49, the positioning ball 54 can be snapped into the limiting recess 64 on the left side under the action of the spring to position the safety knob 45, and the right end of the limiting long 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 can be snapped into the limiting recess 64 on the right side under the action of the spring to position the safety knob 45, and the left end of the limiting long 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 structure of the clamping and mounting mechanism is as follows: a lower splint 3 located on the outside of the front swing seat 1 is provided on the upper end of the swing saw shaft 2, a through hole vertically penetrating the swing saw shaft 2 and the lower splint 3 is provided in the swing saw shaft 2, a pressure rod 4 is movably inserted in the through hole of the swing saw shaft 2, an upper splint 5 is provided on the upper end of the pressure rod 4, the upper splint 5 is located above the lower splint 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 sleeved 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, and a lower thrust washer 1 is provided on the bottom of the outer wall of the tensioning sleeve 7 0, a ball 11 is installed between the upper thrust washer 9 and the lower thrust washer 10, so that when the pressing sleeve 8 presses the tensioning sleeve 7 through the two thrust washers and the ball 11, it can not hinder the tensioning sleeve 7 from rotating back and forth with the swing saw shaft 2. A lower supporting cap 12 is threadedly connected in the bottom opening of the pressing sleeve 8. When the pressing sleeve 8 moves upward, the tensioning sleeve 7 can be supported by the lower supporting cap 12. Guide blocks 13 are respectively provided on both sides of the pressing sleeve 8. Two guide grooves 14 are provided in the base 6. The two guide blocks 13 are respectively located in the two guide grooves 14 and are respectively vertically guided by the guide grooves 14. The nut sleeve 15 is sleeved on the outside of the pressing sleeve 8 and is threaded with the two guide blocks 13 respectively. The outer knob 16 is rotatably mounted on the outer side of the nut sleeve 15, and a lower cap 17 is threadedly connected on 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 shift ring 18 is provided on the lower part of the outer wall of the nut sleeve 15, and an upper shift 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 shift ring 19 and the lower shift ring 18, and a torsion spring 20 is placed in the annular cavity. One end of the torsion spring 20 is inserted in the upper shift ring 19, and the other end of the torsion spring 20 is inserted in the lower shift ring 18, so that the outer knob 16 can be driven to rotate by an external force to drive the nut sleeve 15 to rotate through the torsion spring 20, and the screw After the female sleeve 15 rotates, it can drive the two guide blocks 13 to move up and down with the pressure sleeve 8 and the lower supporting cap 12. After the outer knob 16 is driven by external force to rotate forward, the pressure sleeve 8 will drop, and the lower supporting cap 12 will support the tightening sleeve 7, the pressure rod 4, and the upper splint 5 to drop, so that the upper splint 5 and the lower splint 3 can clamp the rear end of the saw blade 28, and then the pressure sleeve 8 continues to drop. It can press the tightening sleeve 7 so that the upper splint 5 and the lower splint 3 can clamp the rear end of the saw blade 28; after the outer knob 16 is driven by external force to rotate reversely, the pressure sleeve 8 will rise, and the lower supporting cap 12 will support the tightening sleeve 7, the pressure rod 4, and the upper splint 5 to rise, so that the upper splint 5 and the lower splint 3 can release the saw blade 28.

[0036] The clamping installation mechanism drives the nut sleeve 15 to rotate through the outer knob 16. After the nut sleeve 15 rotates, it drives the pressure sleeve 8 to press the tensioning sleeve 7. A ball 11 is installed between the pressure sleeve 8 and the tensioning sleeve 7, so that the pressure sleeve 8 will not affect the operation of the saw blade when it is pressed. After the pressure sleeve 8 compresses the tensioning sleeve 7 and the pressure rod 4, it can only be decompressed by driving the outer knob 16 to rotate with the nut sleeve 15. Therefore, in the absence of external force to drive the outer knob 16 to rotate, the upper clamping plate 5 cannot be pried up by external force acting on the saw blade, so that the clamping installation mechanism can reliably clamp the saw blade.

[0037] The top of the nut sleeve 15 will be blocked and limited, so that after the nut sleeve 15 rotates, it can drive the pressing sleeve 8 to move downward and compress the tensioning sleeve 7. After the two splints clamp the saw blade, the top of the nut sleeve 15 will be limited and clamped under the action of the reaction force. In order to prevent the outer knob 16 from being lifted up by the nut sleeve 15 and stuck against the base 6, the outer knob 16 and the nut sleeve 15 are not directly fixed and transmitted, but are transmitted by a torsion spring 20. In this way, after the nut sleeve 15 is limited and clamped, the outer knob 16 can still rotate normally.

[0038] In this embodiment, a locking spring 21 is also provided on the base 6. This spring is located above the nut housing 15. When the outer knob 16 is rotated forward by an external force until the two clamping plates are clamped, the locking spring 21 is pressed and deformed by the nut housing 15, preventing the nut housing 15 from loosening. This prevents the nut housing 15 from rotating in the reverse direction only after external force overcomes the frictional resistance. This arrangement effectively reduces the impact of the electric oscillating saw's operating vibrations on the nut housing 15.

[0039] An annular tooth surface 22 is also provided on the base 6 and is located above the outer knob 16. The lower surface of the annular tooth 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 is pushed against the teeth on the annular tooth surface 22. When the outer knob 16 rotates, the steel ball 25 will always be in contact with the teeth on the annular tooth surface 22 and move along the annular tooth surface 22. After the steel ball 25 and the teeth are in contact, they can apply a rotational resistance to the outer knob 16, so that the outer knob 16 cannot rotate freely without external force.

[0040] The opposite end surfaces of the upper thrust washer 9 and the lower thrust washer 10 are respectively configured to be spherical arc surfaces that can cooperate with the ball 11, so that the rotation can be smoother.

[0041] The tightening sleeve 7 is screwed with a fixing screw 26 for tightening the lower end of the pressure rod 4. The lower cover 17 is screwed with a locking screw 27 for tightening the lower end of the base 6. This arrangement is for the tightening sleeve 7 and the lower cover 17 to be locked and not loose during work.

[0042] Several mounting bosses 24 are provided on the upper surface of the lower splint 3, and mounting holes corresponding to the mounting bosses 24 are provided on the rear end of the saw blade 28. The rear end of the saw blade 28 can be inserted into the mounting holes through the mounting bosses 24 for positioning. A circular groove 29 is provided on the lower end surface of the upper splint 5 for avoiding the mounting bosses 24. The circular groove 29 does not hinder the upper splint 5 from pressing the saw blade 28. The cross-section of the mounting boss 24 is a cone that is wide at the bottom and narrow at the top, so that the mounting hole on the saw blade 28 can still fit tightly with the mounting boss 24 after it is worn and expanded.

[0043] In order to facilitate the installation of the battery pack assembly 33 and prevent the battery pack assembly 33 from contacting and contaminating the handle shell 32, as shown in FIG. Figure 7 As shown, there is also a battery guide sleeve 62 that can be clamped on the bottom opening of the handle shell 32. The battery pack assembly 33 can be guided by the battery guide sleeve 62 when inserted, so that the battery pack assembly 33 does not touch the end face of the bottom opening of the handle shell 32 and can be smoothly inserted into the handle shell 32.

[0044] like Figure 8 、 Figure 9 As shown, the structure of the cover plate 37 is as follows: a cover plate body 55, a turntable 56 and a limiting column 57 are installed in the cover plate body 55, a rotary handle 58 for driving the turntable 56 to rotate is installed in the stepped hole on the outer surface of the cover plate body 55, a mounting blind hole is provided on the side wall of the rotary handle 58, a steel ball 59 and a spring are placed in the mounting blind hole, a ball hole 60 is provided on the side wall of the stepped hole of the cover plate body 55, and convex locking edges 61 are respectively provided on both sides of the turntable 56. When the rotary handle 58 is driven by external force to rotate the turntable 56 forward to the locking position, the convex locking edges 61 on both sides of the turntable 56 can respectively extend out of the two sides of the cover plate body 55, and the turntable 56 will be limited by the limiting column 57. When the handle 58 is driven to rotate, the steel ball 59 will be pressed back into the installation blind hole. When the handle 58 is driven by external force to rotate the turntable 56 in the opposite direction to the unlocked position, the convex locking edges 61 on both sides of the turntable 56 can be retracted into the cover plate body 55 respectively, and the turntable 56 will be limited by the limiting column 57 and cannot continue to rotate in the opposite direction; locking grooves 63 are respectively provided on the inner walls on both sides of the bottom opening of the handle shell 32; after the cover plate 37 is placed in the bottom opening of the handle shell 32, it can be locked in the opening through the two convex locking edges 61.

Claims

1. A reusable electric oscillating saw for orthopedic surgery, characterized by: include: The front swing seat, tube shell, handle seat, handle shell, battery pack assembly, a motor is installed in the tube shell, the front swing seat is fixed relative to the front end of the tube shell, the swing saw shaft is rotatably installed vertically in the front swing seat through a bearing, the upper and lower ends of the swing saw shaft extend out of the front swing seat respectively, the saw blade is detachably installed on the upper end of the swing saw shaft through a clamping mounting mechanism, the swing saw shaft is driven to rotate back and forth by the motor in the tube shell, so that the saw blade can swing and saw under the drive of the swing saw shaft, a wire threading port is opened on the bottom of the tube shell, the handle seat is installed on the outside of the wire threading port by screws, a main plug is provided in the handle seat, the positive and negative poles of the motor are connected to the main plug through the power supply circuit passing through the wire threading port, the upper end of the handle shell is sleeved on the outside of the handle seat and is fixed to the handle seat, and the battery pack assembly is pluggable from the bottom opening of the handle shell. It is inserted into the handle shell, and a removable cover plate is installed on the bottom opening of the handle shell. The battery pack assembly is provided with an auxiliary plug and a power supply button. The auxiliary plug and the main plug can be connected to each other after the battery pack assembly is inserted. A start button exposed to the outside and can be pressed manually is provided on the front end of the handle seat. By pressing the start button, the power supply button on the battery pack assembly inserted in the handle shell can be pressed. The battery pack assembly starts to supply power after the power supply button is pressed, and the electric energy is transmitted to the motor through the two relatively connected plugs and the power supply circuit. The motor starts to work after it is energized; the rear port of the tube shell is sealed, the joint between the front swing seat and the tube shell 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 respectively, and the threading port is sealed with glue after the threading is completed.

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 tube shell. The installation gap of the rear port of the tube shell 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 and 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 supplying 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 installed in the rear port of the tube shell, a knob seat, and a rotating seat. The knob seat is inserted into the knob housing and is coaxially arranged with the knob housing. The knob seat and the knob housing are fixed by screws. Four contact pieces are inserted into the knob seat. The four contact pieces are respectively located at the upper, lower, left and right of the knob seat. The four contact pieces are used to connect to the motor and the main plug through wires. The rotating seat is rotatably installed in the knob seat and is coaxially arranged with the knob seat. Two spring pieces located inside the four contact pieces are clamped on the outer wall of the rotating seat. The two spring pieces are respectively located on the upper and lower sides of the rotating seat. A safety knob for driving its rotation is installed on the rotating seat. Three identification marks are provided, namely the disconnection mark corresponding to the disconnection of the power supply circuit, the left connection mark and the right connection mark corresponding to the connection of the power supply circuit. Initially, the pointer on the safety knob points to the disconnection mark, and the two spring pieces only contact the upper and lower contact pieces one-to-one respectively; after the safety knob is driven by external force to rotate forward, the pointer on it can point to the left connection mark, and after the safety knob is driven by external force to rotate reversely, the pointer on it can also point to the right connection mark. When the pointer on the safety knob points to the connection mark, the upper contact piece and the contact piece on one side can be connected by contacting the upper spring piece respectively, and at the same time, the lower contact piece and the contact piece on the other side can be connected by contacting the lower spring piece respectively.

4. The reusable electric oscillating saw for orthopedic surgery according to claim 3, characterized in that: When the safety knob is rotated to point to the connection mark of the left, the positioning ball can be stuck in the limiting concave hole on one side under the action of the spring to position the safety knob. One end of the limiting long slot can block the limiting protrusion to limit the safety knob to the left. When the safety knob is rotated to point to the connection mark of the right, the positioning ball can be stuck in the limiting concave hole on the other side under the action of the spring to position the safety knob. The other end of the limiting long slot can block the limiting protrusion to limit the safety knob to the right.

5. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3 or 4, characterized in that: The structure of the clamping installation mechanism is as follows: a lower splint located on the outside of the front swing seat is provided on the upper end of the swing saw shaft, a through hole vertically penetrating the swing saw shaft and the lower splint is provided in the swing saw shaft, a pressure rod is movably inserted in the through hole of the swing saw shaft, an upper splint is provided on the upper end of the pressure rod, the upper splint is located above the lower splint, a base is threadedly connected to the lower end of the front swing seat, and sealing glue is applied at the threaded connection between the two, the lower end of the pressure rod extends into the base, a tightening sleeve is threadedly connected to the lower end of the pressure rod, a pressing sleeve is sleeved on the outside of the tightening sleeve, and an upper stop is provided on the top of the inner wall of the pressing sleeve. A push washer is provided on the bottom of the outer wall of the tensioning sleeve, and a ball is installed between the upper thrust washer and the lower thrust washer, so that when the pressure sleeve presses the tensioning sleeve through the two thrust washers and the ball, it will not hinder the tensioning sleeve from rotating back and forth with the swing saw shaft. A lower supporting cap is threadedly connected in the bottom opening of the pressure sleeve, and the tensioning sleeve can be supported by the lower supporting cap when the pressure sleeve moves upward. Guide blocks are respectively provided on both sides of the pressure sleeve, and two guide grooves are provided in the base. The two guide blocks are respectively located in the two guide grooves and are respectively vertically guided by the guide grooves. The nut collar is sleeved on The outer side of the pressing sleeve is threadedly connected with the two guide blocks respectively. The outer knob can be rotatably sleeved on the outer side of the nut sleeve. A lower cover cap is threadedly connected to the lower end of the base. The base and the lower cover cap can axially limit the outer knob and the nut sleeve. A lower shift ring is provided on the lower part of the outer wall of the nut sleeve, and an upper shift ring is provided on the upper part of the inner wall of the outer knob. An annular cavity is left between the upper shift ring and the lower shift ring. A torsion spring is placed in the annular cavity, one end of the torsion spring is inserted in the upper shift ring, and the other end of the torsion spring is inserted in the lower shift ring, so that the outer knob can be driven to rotate by external force to drive the nut through the torsion spring When the female sleeve rotates, the nut sleeve can drive the two guide blocks to move up and down with the pressure sleeve and the lower supporting cap. After the outer knob is driven by external force to rotate forward, the pressure sleeve will drop, and the lower supporting cap will support the tightening sleeve, the pressure rod, and the upper splint to drop, so that the upper splint and the lower splint can clamp the rear end of the saw blade. Then the pressure sleeve can continue to drop and press the tightening sleeve, so that the upper splint and the lower splint can clamp the rear end of the saw blade. After the outer knob is driven by external force to rotate reversely, the pressure sleeve will rise, and the lower supporting cap will support the tightening sleeve, the pressure rod, and the upper splint to rise, so that the upper splint and the lower splint 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, which is located above the nut sleeve. When the outer knob is driven by external force to rotate forward until the two clamps are clamped, the locking spring can prevent the nut sleeve from loosening by being pressed and deformed by the nut sleeve, so that the nut sleeve can only be driven to rotate in the opposite direction after the friction resistance is overcome by external force.

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

8. The reusable electric oscillating saw for orthopedic surgery according to claim 5, characterized in that: Several mounting bosses are provided on the upper surface of the lower splint, and mounting holes corresponding to the mounting bosses are provided on the rear end of the saw blade. The rear end of the saw blade can be inserted into the mounting holes through the mounting bosses for positioning. Circular grooves are provided on the lower end surface of the upper splint for avoiding the mounting bosses. The circular grooves do not hinder the upper splint from pressing the saw blade. The cross-section of the mounting boss is conical with a wider bottom and a narrower top, so that the mounting hole on the saw blade can still fit tightly with the mounting boss after it is worn and expanded.

9. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3 or 4, characterized in that: A battery guide sleeve is also provided which can be clipped onto the bottom opening of the handle shell. The battery guide sleeve can be used to guide the battery pack assembly when it is inserted, so that the battery pack assembly does not touch the end face of the bottom opening of the handle shell and can be smoothly inserted into the handle shell.

10. The reusable electric oscillating saw for orthopedic surgery according to claim 1, 2, 3 or 4, characterized in that: The structure of the closing cover plate is as follows: a cover plate body, a turntable and a limiting column are installed in the cover plate body, a rotary handle for driving the turntable to rotate is installed in the stepped hole on the outer surface of the cover plate body, a mounting blind hole is provided on the side wall of the rotary handle, a steel ball and a spring are placed in the mounting 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 respectively provided on both sides of the turntable. When the rotary 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 of the two sides of the cover plate body respectively, and the turntable will be limited by the limiting column and cannot continue to move. When the forward rotation continues, the steel ball will be stuck in 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 installation blind hole. When the handle is driven by external force to rotate the turntable in the opposite direction to the unlocked position, the convex locking edges on both sides of the turntable can be retracted into the cover plate body respectively, and the turntable will be limited by the limiting column and cannot continue to rotate in the opposite direction; locking grooves are respectively provided on the inner walls on both sides of the bottom opening of the handle shell; after the cover plate is placed in the bottom opening of the handle shell, it can be locked in the opening through the two convex locking edges.

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