Integrated electric bone saw for operation

Abstract

The utility model relates to the technical field of medical instruments, in particular to an integrated electric bone saw for surgery, which comprises a knife saw component, a supporting component, a transmission component and a handheld component, the handheld component comprises a shell and a motor, an eccentric shaft is arranged at the output end of a rotating shaft of the motor, and the eccentric shaft and the rotating shaft are eccentrically arranged; a water injection pipe is arranged in the shell and tightly attached to the outer wall of the motor. The transmission assembly comprises a transmission shaft and a reciprocating conversion piece, the transmission shaft is connected with the knife saw assembly, the reciprocating conversion piece is connected with the transmission shaft and the eccentric shaft, and the motor rotates to drive the transmission shaft to slide in the supporting assembly in a reciprocating mode through the reciprocating conversion piece. The bone saw can be used as a disposable surgical instrument and is discarded after being used, the handheld assembly does not need to be disinfected and reused, the risk of cross infection is avoided, due to the integrated design, the assembly time of the saw blade is shortened, the fault risk is effectively reduced, disinfection and operation are facilitated, and the clean and sterile state of a surgical area can be kept.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an integrated electric bone saw for surgery. Background Technology

[0002] An electric bone saw is an orthopedic surgical instrument primarily used for bone cutting and repair surgery. Driven by an electric motor, it uses a high-speed rotating saw blade to cut bone tissue. The electric bone saw mainly consists of an electric motor, saw blade, handle, and control system. The electric motor provides power to drive the saw blade for cutting; the saw blade is the key component for cutting bone and is usually made of high-hardness materials, offering good wear resistance and cutting performance; the handle is the part operated by the surgeon, and a well-designed handle provides a comfortable grip and flexible operation; the control system controls the operation of the electric bone saw, including functions such as start, stop, and speed adjustment.

[0003] The saw blade of the existing electric bone saw is connected to the motor through some transmission components. However, the motor is often not located in the handle. Before use, the saw blade needs to be assembled and connected to the handle. The handle is usually reused, which poses a risk of cross-infection. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an integrated electric bone saw for surgery, which can be used as a disposable surgical instrument and discarded after use. There is no need to disinfect and reuse the handheld components, thus avoiding the risk of cross-infection. In addition, the integrated design reduces the assembly time of the saw blade, effectively reducing the risk of failure, facilitating disinfection and operation, and helping to maintain the cleanliness and sterility of the surgical area.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] An integrated electric bone saw for surgery includes a saw assembly, a support assembly, a transmission assembly, and a handheld assembly. The handheld assembly includes a housing and a motor installed inside the housing. The output end of the motor's shaft has an eccentric shaft, which is eccentrically positioned relative to the shaft. A water injection pipe is installed inside the housing and is tightly attached to the outer wall of the motor. The transmission assembly includes a drive shaft and a reciprocating conversion component. The drive shaft passes through the support assembly and is connected to the saw assembly. The reciprocating conversion component is connected to both the drive shaft and the eccentric shaft. The rotation of the motor drives the drive shaft to slide back and forth within the support assembly via the reciprocating conversion component.

[0007] Furthermore, the reciprocating conversion component includes a reciprocating drive body and a bearing. The reciprocating drive body is rotatably mounted inside the housing. The end of the reciprocating drive body facing the motor has a U-shaped receiving cavity. The bearing is installed in the receiving cavity, and the eccentric shaft is inserted into the bearing. A connector is also fixed on the reciprocating drive body, and a connecting frame is connected to the transmission shaft. The connecting frame is sleeved on the connector.

[0008] Furthermore, a mounting base is installed inside the housing, and the transmission component is fixedly inserted into the mounting base; a pin is installed on the mounting base, and the reciprocating drive body is rotatably mounted on the pin.

[0009] Furthermore, the saw assembly includes a saw blade and a saw blade holder, the saw blade being inserted into the saw blade holder, and the end of the saw blade holder away from the saw blade having a connecting shaft, the connecting shaft being connected to a drive shaft.

[0010] Furthermore, the saw blade holder has a first flat surface on both sides, and a sleeve is fitted on the saw blade holder. The gap between the inner wall of the sleeve and the outer wall of the saw blade holder forms a first water injection channel. Water in the first water injection channel is sprayed onto the saw blade, and the first water injection channel is connected to a water injection pipe.

[0011] Furthermore, the support assembly includes a support outer tube and a water passage pipe. The water passage pipe is sleeved on the drive shaft, and the support outer tube is sleeved on the water passage pipe and the sleeve. One side of the outer wall of the water passage pipe has a second flat surface. The gap between the second flat surface and the inner wall of the support outer tube forms a second water injection channel. The second water injection channel is connected to the first water injection channel.

[0012] Furthermore, the outer support tube has a stepped hole at the end away from the saw blade, and the gap in the stepped hole forms a water injection cavity. One end of the water injection cavity is connected to the second water injection channel, and the other end is connected to the water injection pipe.

[0013] Furthermore, the outer support tube has a water injection hole that communicates with the water injection cavity. An adapter is installed on the outer support tube at the water injection hole. The adapter is hollow inside, and both the water injection tube and the water injection cavity are connected to the interior of the adapter.

[0014] Furthermore, a sealing groove is provided on the second flat surface of the water pipe away from the saw blade, and a sealing element is sleeved on the drive shaft to seal the end of the water injection chamber away from the saw blade.

[0015] Furthermore, the supporting outer tube has a third flat surface, which is close to the saw blade.

[0016] This utility model discloses an integrated electric bone saw for surgical use. The motor is installed inside the housing of the handheld component. A reciprocating conversion mechanism converts the unidirectional rotation of the motor shaft into the reciprocating movement of the transmission shaft, which in turn drives the saw blade holder and saw blade to move back and forth, thus achieving the cutting of bone tissue. The saw blade assembly, transmission assembly, and motor are sequentially connected to form an integrated design, allowing it to be used as a disposable surgical instrument. It is sterilely packaged and discarded after use, eliminating the need for sterilization and reuse of the handheld component, thus avoiding the risk of cross-infection. Furthermore, the integrated design reduces saw blade assembly time, effectively reducing the risk of malfunction, facilitating sterilization and operation, and helping to maintain a clean and sterile surgical area. In this application, a water injection pipe is installed close to the outer wall of the motor. This allows water to be injected into the support assembly and sprayed onto the cutting area for cooling and rinsing. It also absorbs the heat generated by the motor during operation. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the integrated electric bone saw for surgical use according to this utility model.

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the integrated electric bone saw for surgical use according to this utility model;

[0020] Figure 4 This is an enlarged structural diagram of the mounting base;

[0021] Figure 5 This is an enlarged schematic diagram of the water pipe structure;

[0022] Figure 6 This is an enlarged schematic diagram of the structure supporting the outer tube;

[0023] Figure 7 This is an enlarged structural schematic diagram of the seal;

[0024] Figure 8 This is an enlarged structural schematic diagram of the reciprocating drive body;

[0025] The components include: outer shell 110, motor 120, eccentric shaft 121, mounting base 130, pin 131, saw blade 210, saw blade seat 220, first flat surface 221, connecting shaft 230, sleeve 240, transmission shaft 310, connecting frame 311, reciprocating drive body 321, connector 3211, mounting hole 3212, bearing 322, support outer tube 410, water injection hole 411, third flat surface 412, water pipe 420, second flat surface 421, sealing groove 422, water injection pipe 510, adapter 520, sealing element 600, sealing tube 610, sealing sleeve 620, receiving cavity 010, bottom cavity wall 011, inclined wall 012, first arc-shaped wall 013, second arc-shaped wall 014, and water injection cavity 020. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0027] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0028] Please refer to Figures 1-8 :

[0029] This application discloses an integrated electric bone saw for surgery, comprising a saw assembly, a support assembly, a transmission assembly, and a handheld assembly. The handheld assembly includes a housing 110 and a motor 120 mounted within the housing 110. The output end of the motor 120's shaft has an eccentric shaft 121, which is eccentrically positioned relative to the shaft. A water injection pipe 510 is disposed within the housing 110 and is tightly attached to the outer wall of the motor 120. The transmission assembly includes a drive shaft 310 and a reciprocating converter. The drive shaft 310 passes through the support assembly and is connected to the saw assembly. The reciprocating converter is connected to both the drive shaft 310 and the eccentric shaft 121. The rotation of the motor 120 drives the drive shaft 310 to reciprocate within the support assembly via the reciprocating converter.

[0030] In this application, the motor 120 is installed inside the housing 110 of the handheld component. A reciprocating conversion mechanism converts the unidirectional rotation of the motor 120's shaft into the reciprocating movement of the transmission shaft 310, thereby driving the saw blade holder and saw blade to move back and forth to cut bone tissue. The saw blade assembly, transmission assembly, and motor 120 are sequentially connected to form an integrated design, allowing it to be used as a disposable surgical instrument. It is sterile packaged and discarded after use, eliminating the need for sterilization and reuse of the handheld component, thus avoiding the risk of cross-infection. Furthermore, the integrated design reduces saw blade assembly time, effectively lowering the risk of malfunction, facilitating sterilization and operation, and helping to maintain a clean and sterile surgical area. In this application, the water injection pipe 510 is installed close to the outer wall of the motor 120. This allows water to be injected into the support assembly and sprayed onto the cutting position for cooling and rinsing. It also absorbs the heat generated by the motor 120 during operation.

[0031] The reciprocating conversion component includes a reciprocating drive body 321 and a bearing 322. The reciprocating drive body 321 is rotatably mounted within the housing 110. Please refer to... Figure 8 The reciprocating drive body 321 has a U-shaped cavity 010 at one end facing the motor 120. A bearing 322 is installed inside the cavity 010, and an eccentric shaft 121 is inserted into the bearing 322. A connector 3211 is also fixed to the reciprocating drive body 321, and a connecting frame 311 is connected to the drive shaft 310, with the connecting frame 311 sleeved on the connector 3211. The cavity wall of the cavity 010 includes a bottom cavity wall 011 and two side cavity walls, located at opposite ends of the bottom cavity wall 011. To minimize interference, a first arc-shaped wall 013 connects the side cavity walls and the bottom cavity wall 011. The side cavity walls include an inclined wall 012 (higher on the outside, lower on the inside) and a second arc-shaped wall 014. The inclination of the inclined wall 012 is 5–20°, preferably 15°. The second arc-shaped wall 014 is located at the opening of the cavity 010. The first arc-shaped wall 013, the inclined wall 012, and the second arc-shaped wall 014 are connected in sequence to form a smooth wall surface.

[0032] In use, the motor 120 rotates, and driven by the shaft of the motor 120, the eccentric shaft 121 rotates eccentrically relative to the shaft. During this process, the eccentric shaft 121 has displacement in the vertical direction (perpendicular to the center line of the shaft). The bearing 322 is installed in the receiving cavity 010, and the reciprocating movement of the eccentric shaft 121 in the vertical direction is transmitted by the bearing 322 to the reciprocating drive body 321 to reciprocate in the vertical direction. The reciprocating movement of the reciprocating drive body 321 in the vertical direction will pull the transmission shaft 310 to reciprocate through the connecting frame 311, thereby driving the saw blade holder 220 and the saw blade 210 to reciprocate, realizing the cutting of bone tissue. Using the bone saw of this application, whether the bone saw is held horizontally, vertically, or at an angle, the cut bone tissue is subjected to uniform force, the saw cut surface is neat and stable, which can improve the treatment effect of bone tissue grinding or repair, the wound heals faster, and can also effectively control the depth and width of the saw cut.

[0033] A mounting base 130 is installed inside the outer casing 110, and the transmission component is fixedly inserted into the mounting base 130. A pin 131 is mounted on the mounting base 130, and the reciprocating drive 321 is rotatably mounted on the pin 131. Specifically, the reciprocating drive 321 has a mounting hole 3212, and the pin 131 passes through the mounting hole 3212. Preferably, the center point of the mounting hole 3212 is the intersection of the center line of the connector 3211 in the vertical direction and the center line of the receiving cavity 010. The mounting base 130 is connected to the housing of the motor 120, and the connection is sealed with glue.

[0034] The saw assembly includes a saw blade 210 and a saw blade holder 220. The saw blade 210 is inserted into the saw blade holder 220. The end of the saw blade holder 220 away from the saw blade 210 has a connecting shaft 230, which is connected to the drive shaft 310.

[0035] The saw blade holder 220 has a first flat surface 221 on both sides. A sleeve 240 is fitted onto the saw blade holder 220. The gap between the inner wall of the sleeve 240 and the outer wall of the saw blade holder 220 forms a first water injection channel. Water in the first water injection channel is sprayed onto the saw blade 210. The first water injection channel is connected to the water injection pipe 510. The support assembly includes a support outer pipe 410 and a water passage pipe 420. The water passage pipe 420 is fitted onto the drive shaft 310. The support outer pipe 410 is fitted onto the water passage pipe 420 and the sleeve 240. A second flat surface 421 is located on one side of the outer wall of the water passage pipe 420. The gap between the second flat surface 421 and the inner wall of the support outer pipe 410 forms a second water injection channel. The second water injection channel is connected to the first water injection channel. The outer support tube 410 has a stepped hole at the end away from the saw blade 210. The gap in the stepped hole forms a water injection chamber 020. One end of the water injection chamber 020 is connected to the second water injection channel, and the other end is connected to the water injection pipe 510. The outer support tube 410 has a water injection hole 411, which is connected to the water injection chamber 020. An adapter 520 is installed on the outer support tube 410 at the water injection hole 411. The adapter 520 is hollow inside, and both the water injection pipe 510 and the water injection chamber 020 are connected to the interior of the adapter 520.

[0036] Water is injected into the water injection pipe 510. The injected water passes through the water injection pipe 510, the adapter 520, the water injection chamber 020, the second water injection channel, and the first water injection channel in sequence, and is sprayed from the first water injection channel onto the saw blade 210 to achieve cooling and rinsing of the cutting position.

[0037] To improve the sealing performance inside the bone saw, a sealing groove 422 is provided on the second flat surface 421 of the water pipe 420 away from the saw blade 210. A sealing element 600 is sleeved on the drive shaft 310, sealing the end of the water injection cavity 020 away from the saw blade 210. The sealing element 600 includes a sealing tube 610 and a sealing sleeve 620. One end of the sealing tube 610 is located inside the water injection cavity 020 and inserted into the sealing sleeve 620, while the other end extends out of the water pipe 420 and is fixedly connected to the mounting base 130. The sealing sleeve 620 is located inside the water injection cavity 020, with one end sleeved on the drive shaft 310 and the other end sleeved on the sealing tube 610.

[0038] To facilitate the movement of the saw blade 210 in bone tissue, the outer support tube 410 has a third flat surface 412, which is close to the saw blade 210.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An integrated electric bone saw for surgical use, characterized in that, The device includes a saw assembly, a support assembly, a transmission assembly, and a handheld assembly. The handheld assembly includes a housing and a motor installed inside the housing. The output end of the motor's shaft has an eccentric shaft, which is eccentrically positioned relative to the shaft. A water injection pipe is installed inside the housing and is tightly attached to the outer wall of the motor. The transmission assembly includes a drive shaft and a reciprocating conversion component. The drive shaft passes through the support assembly and is connected to the saw assembly. The reciprocating conversion component is connected to both the drive shaft and the eccentric shaft. The rotation of the motor drives the drive shaft to slide back and forth within the support assembly via the reciprocating conversion component.

2. The integrated electric bone saw for surgery according to claim 1, characterized in that, The reciprocating conversion component includes a reciprocating drive body and a bearing. The reciprocating drive body is rotatably mounted inside the housing. The end of the reciprocating drive body facing the motor has a U-shaped receiving cavity. The bearing is installed in the receiving cavity, and the eccentric shaft is inserted into the bearing. A connector is also fixed on the reciprocating drive body. A connecting frame is connected to the transmission shaft, and the connecting frame is sleeved on the connector.

3. The integrated electric bone saw for surgery according to claim 2, characterized in that, A mounting base is installed inside the housing, and the transmission component is fixedly inserted into the mounting base; a pin is installed on the mounting base, and the reciprocating drive body is rotatably mounted on the pin.

4. The integrated electric bone saw for surgery according to claim 1, characterized in that, The saw assembly includes a saw blade and a saw blade holder. The saw blade is inserted into the saw blade holder, and the end of the saw blade holder away from the saw blade has a connecting shaft, which is connected to a drive shaft.

5. The integrated electric bone saw for surgery according to claim 4, characterized in that, The saw blade holder has a first flat surface on both sides. A sleeve is fitted on the saw blade holder. The gap between the inner wall of the sleeve and the outer wall of the saw blade holder forms a first water injection channel. Water in the first water injection channel is sprayed onto the saw blade. The first water injection channel is connected to a water injection pipe.

6. The integrated electric bone saw for surgery according to claim 5, characterized in that, The support assembly includes a support outer tube and a water passage tube. The water passage tube is sleeved on the drive shaft. The support outer tube is sleeved on the water passage tube and the sleeve. One side of the outer wall of the water passage tube has a second flat surface. The gap between the second flat surface and the inner wall of the support outer tube forms a second water injection channel. The second water injection channel is connected to the first water injection channel.

7. The integrated electric bone saw for surgery according to claim 6, characterized in that, The outer support tube has a stepped hole at the end away from the saw blade. The gap in the stepped hole forms a water injection cavity. One end of the water injection cavity is connected to the second water injection channel, and the other end is connected to the water injection pipe.

8. The integrated electric bone saw for surgery according to claim 7, characterized in that, The outer support tube has a water injection hole that communicates with the water injection cavity. An adapter is installed on the outer support tube at the water injection hole. The adapter is hollow inside, and both the water injection tube and the water injection cavity are connected to the interior of the adapter.

9. The integrated electric bone saw for surgery according to claim 8, characterized in that, A sealing groove is provided on the second flat surface of the water pipe away from the saw blade, and a sealing element is sleeved on the drive shaft to seal the end of the water injection chamber away from the saw blade.

10. The integrated electric bone saw for surgery according to claim 6, characterized in that, The outer support tube has a third flat surface, which is close to the saw blade.

Images