Osteotome for operation

Abstract

The utility model relates to the technical field of orthopedic surgical instruments, in particular to a surgical osteotome which comprises a saw blade component and a transmission shaft connected with the saw blade component, the saw blade component comprises a saw blade with sawteeth, a saw blade seat and a saw handle, the saw blade is inserted into the saw blade seat, the saw handle is sleeved on the outer side of the saw blade seat, and the transmission shaft is connected with the saw blade component. And the transmission shaft is connected with the saw blade seat. According to the bone knife, the saw blade is inserted into the saw blade seat, and then the saw blade seat is sleeved with the saw handle, so that the installation stability of the saw blade can be enhanced, the strength of the saw blade assembly can be enhanced, and the problem that the integrally-formed bone knife saw blade is prone to being broken in use is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic surgical instruments, in particular to a bone knife for surgery. Background Art

[0002] Orthopedics is one of the most common departments in major hospitals, mainly studying the anatomy, physiology and pathology of the musculoskeletal system, and using drugs, surgery and physical methods to maintain and develop the normal shape and function of this system. Surgery is the main treatment method in orthopedics, and bone saws are commonly used medical devices in orthopedic surgeries. Through bone saws, the bones at the part to be excised can be effectively excised.

[0003] For the traditional bone saw blade, the tooth part and the handle part are integrally formed. For example, a multifunctional special orthopedic saw for orthopedic surgery disclosed in Chinese Patent CN117717389A is easy to break at the connection between the tooth part and the handle part of the saw blade during use, resulting in the suspension of the surgery or other injuries to the patient, increasing the surgical risk. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a bone knife for surgery, which can not only enhance the stability of the saw blade installation, but also enhance the strength of the saw knife assembly, and avoid the problem that the integrally formed bone saw blade is easy to break during use.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] The bone knife for surgery includes a saw knife assembly and a transmission shaft connected to the saw knife assembly. The saw knife assembly includes a saw blade with saw teeth, a saw blade seat and a saw handle. The saw blade is inserted into the saw blade seat, the saw handle is sleeved outside the saw blade seat, and the transmission shaft is connected to the saw blade seat.

[0007] For the bone knife adopting the above technical scheme, the saw blade is inserted into the saw blade seat, and then the saw handle is sleeved on the saw blade seat, which can not only enhance the stability of the saw blade installation, but also enhance the strength of the saw knife assembly, and avoid the problem that the integrally formed bone saw blade is easy to break during use.

[0008] In some embodiments, the saw blade seat has a socket, and one end of the saw blade is inserted into the socket; the saw blade has a limiting strip, and the saw blade seat has a clamping groove, and the limiting strip is embedded in the clamping groove.

[0009] In some embodiments, at least one side of the saw blade seat has a first flat side, and there is a first water injection channel between the first flat side and the inner wall of the saw handle.

[0010] In some embodiments, an outer tube is sleeved on the transmission shaft, and there is a second water injection channel between the outer tube and the transmission shaft, and the second water injection channel is communicated with the first water injection channel.

[0011] In some embodiments, the bone knife further includes a transfer component for driving the saw blade assembly to perform a reciprocating telescopic motion. The transfer component includes a reciprocating conversion member, a first bearing, and an eccentric input shaft. The reciprocating conversion member is rotatable. The first bearing is installed inside the reciprocating conversion member. The eccentric input shaft includes a main shaft and an eccentric column fixed at one end of the main shaft. The eccentric column is eccentrically arranged with respect to the main shaft. The eccentric column is inserted into the first bearing. The reciprocating conversion member is connected to the transmission shaft. The main shaft and the transmission shaft are eccentrically arranged. The transmission shaft and the main shaft are respectively located on opposite sides of the reciprocating conversion member. The reciprocating conversion member cooperates with the first bearing to convert the one-way rotation of the eccentric input shaft into the reciprocating telescopic motion of the transmission shaft.

[0012] In some embodiments, a connection block is fixed at one end of the transmission shaft away from the saw blade assembly. The connection block has a connection groove. The reciprocating conversion member has a connection post at a position corresponding to the connection groove. The connection post is embedded in the connection groove.

[0013] In some embodiments, the end of the reciprocating conversion member facing the eccentric input shaft has a connection frame. The outer wall of the first bearing fits against the inner wall of the connection frame.

[0014] In some embodiments, the bone knife further includes a front housing, a rear housing, and a spiral water cooling sleeve. The rear housing is sleeved on the spiral water cooling sleeve. There is a third water injection channel between the spiral water cooling sleeve and the inner wall of the rear housing. One end of the front housing is inserted into the rear housing. The front housing has a water injection cavity. The water injection cavity is communicated with the third water injection channel. The outer tube is inserted into the front housing. The second water injection channel is communicated with the water injection cavity.

[0015] In some embodiments, a support tube is sleeved on the transmission shaft. The support tube is located inside the outer tube. One side of the support tube has a second flat side. The gap between the second flat side and the inner wall of the outer tube forms a part of the second water injection channel.

[0016] In some embodiments, a sealing bushing is inserted into the interior of the end of the support tube away from the saw blade assembly. The end of the sealing bushing away from the saw blade assembly is sealingly connected to the inner wall of the front housing. A closed tube is also arranged inside the end of the support tube away from the saw blade assembly. One end of the closed tube is sleeved on the transmission shaft, and the other end is sleeved on the sealing bushing.

[0017] The bone saw of the present utility model drives the main shaft in the eccentric input shaft to perform a one-way rotational movement under the action of a driving motor. During this process, the reciprocating conversion member cooperates with the first bearing to convert the one-way rotation of the eccentric input shaft into the reciprocating telescopic movement of the transmission shaft, which is used for sawing and grinding bone tissue. Moreover, the force on the bone tissue position processed by the saw blade is uniform, the saw cut wound surface is neat, effectively improving the processing effect of bone tissue grinding or repair, and also facilitating the control of the depth and width of the saw cut. For the bone saw of the present utility model, water is injected into the spiral channel of the spiral water-cooling sleeve through an external water injection mechanism. The injected water flows into the water injection through groove through the spiral channel, and then into the water injection cavity, enters the second water injection channel inside the outer tube, then enters the first water injection channel inside the saw handle, and finally flows out from the end face of the saw blade seat, which is used for flushing and cooling the sawing position to improve the surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the surgical bone saw of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged structural schematic diagram of part A in

[0020] Figure 3 is Figure 2 an enlarged structural schematic diagram of part B in

[0021] Figure 4 is a structural schematic diagram of the surgical bone saw of the present utility model;

[0022] Figure 5 is a structural schematic diagram of the saw blade assembly;

[0023] Figure 6 is an enlarged structural schematic diagram of the reciprocating conversion member;

[0024] Figure 7 is an enlarged structural schematic diagram of the front housing;

[0025] Figure 8 is an enlarged structural schematic diagram of the eccentric input shaft;

[0026] Figure 9 is an enlarged structural schematic diagram of the support tube;

[0027] Among them, there are saw blade 110, limit strip 111, saw blade seat 120, saw blade insertion end 1201, shaft insertion end 1202, insertion slot 121, card slot 122, first flat square 123, saw handle 130, transmission shaft 200, connection block 210, connection slot 211, outer tube 310, stepped hole 311, support tube 320, second flat square 321, reciprocating conversion part 410, connection column 411, connection frame 412, mounting hole 413, pin shaft 414, first bearing 420, eccentric input shaft 430, main shaft 431, eccentric column 432, front housing 510, water injection cavity 511, water injection through groove 512, rear housing 520, spiral water cooling sleeve 530, spiral channel 531, interface pipe 540, second bearing 550, sealing bushing 610, closed pipe 620, first water injection channel 001, second water injection channel 002, bottom groove wall 041, side groove wall 042, inclined plane section 0421, arc section 0422, circular arc section 043. Detailed implementation manners

[0028] The following specific embodiments are used to illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the diagrams provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the diagrams will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the diagrams may be omitted.

[0029] In the diagrams of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the diagrams, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the diagrams are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] Please refer to Figures 1-9 , the bone scalpel for surgery of the present utility model includes a saw blade assembly and a transmission shaft 200 connected to the saw blade assembly. The saw blade assembly includes a saw blade 110 with serrations, a saw blade seat 120 and a saw handle 130. The saw blade 110 is inserted into the saw blade seat 120, the saw handle 130 is sleeved outside the saw blade seat 120, and the transmission shaft 200 is connected to the saw blade seat 120.

[0031] Through the above technical solution, the saw blade 110 is inserted into the saw blade seat 120, and then the saw handle 130 is sleeved on the saw blade seat 120, so that the saw blade 110 is stably and firmly installed and not easily broken. It can not only enhance the stability of the installation of the saw blade 110, but also enhance the strength of the saw blade assembly, avoiding the problem that the integrally formed bone saw blade is easily broken during use.

[0032] Please refer to Figure 5 In this embodiment, the saw blade seat 120 has a plug-in groove 121, and one end of the saw blade 110 is inserted into the plug-in groove 121. The plug-in groove 121 is a strip-shaped sheet groove that penetrates through a section of the saw blade seat 120. The saw blade 110 has a limit strip 111, and the saw blade seat 120 has a card slot 122. The card slot 122 communicates with the plug-in groove 121, and the limit strip 111 is embedded in the card slot 122. In order to strengthen the stable and firm installation of the saw blade 110, multiple limit strips 111 can be provided, and the same number of card slots 122 are correspondingly provided. The multiple card slots 122 can be equidistantly arranged on the opposite sides or the same side of the plug-in groove 121.

[0033] In this embodiment, at least one side of the saw blade seat 120 has a first flat side 123. The first flat side 123 penetrates through one end of the saw blade seat 120 where the saw blade 110 is inserted. There is a first water injection channel 001 between the first flat side 123 and the inner wall of the saw handle 130. The first water injection channel 001 runs through the entire saw handle 130. The saw blade seat 120 includes a saw blade insertion end 1201 and a shaft insertion end 1202. The first flat side 123 runs through the entire saw blade insertion end 1201. The outer diameter of the shaft insertion end 1202 is smaller than the outer diameter of the saw blade insertion end 1201. Two first flat sides 123 can be provided, respectively located on the opposite sides of the saw blade insertion end 1201, so as to form a more unobstructed gap with the inner wall of the saw handle 130 to constitute the first water injection channel 001. Water is injected into the first water injection channel 001, and the injected water flows out from the end face of the saw blade 110 insertion end, for flushing and cooling the sawing position.

[0034] In this embodiment, an outer tube 310 is sleeved on the transmission shaft 200. There is a second water injection channel 002 between the outer tube 310 and the transmission shaft 200. The second water injection channel 002 communicates with the first water injection channel 001.

[0035] In this embodiment, the bone knife further includes a transfer component for driving the saw blade assembly to perform reciprocating telescopic motion. The transfer component includes a reciprocating conversion member 410, a first bearing 420, and an eccentric input shaft 430. The first bearing 420 is installed inside the reciprocating conversion member 410. The reciprocating conversion member 410 is connected to the transmission shaft 200. Specifically, a connection block 210 is fixed to one end of the transmission shaft 200 away from the saw blade assembly. The connection block 210 has a connection groove 211, and the connection groove 211 is arranged in an inverted buckle manner. The reciprocating conversion member 410 has a connection column 411 at a position corresponding to the connection groove 211, and the connection column 411 is embedded in the connection groove 211. By embedding the connection column 411 into the connection groove 211 on the connection block 210, the connection between the reciprocating conversion member 410 and the transmission shaft 200 is realized. Please refer to Figure 8 , the eccentric input shaft 430 includes a main shaft 431 and an eccentric column 432 fixed to one end of the main shaft 431. The eccentric column 432 is eccentrically arranged with respect to the main shaft 431. The eccentric column 432 is inserted into the first bearing 420. The main shaft 431 is eccentrically arranged with respect to the transmission shaft 200. The transmission shaft 200 and the main shaft 431 are respectively located on opposite sides of the reciprocating conversion member 410. The reciprocating conversion member 410 cooperates with the first bearing 420 to convert the one-way rotation of the eccentric input shaft 430 into the reciprocating telescopic motion of the transmission shaft 200.

[0036] Please refer to Figure 6 , in this embodiment, one end of the reciprocating conversion member 410 facing the eccentric input shaft 430 has a connection frame 412 for installing the first bearing 420. The frame of the connection frame 412 can be U-shaped or C-shaped. The outer wall of the first bearing 420 is attached to the inner wall of the connection frame 412. In this embodiment, in order to better realize the transmission of force and convert the one-way rotation of the eccentric input shaft 430 into the reciprocating telescopic motion of the transmission shaft 200, it is preferably that the vertical center line of the connection column 411 is perpendicular to the horizontal center line of the connection frame 412. The reciprocating conversion member 410 has a mounting hole 413 located at the intersection of the vertical center line of the connection column 411 and the horizontal center line of the connection frame 412. A pin shaft 414 is inserted through the mounting hole 413, and the reciprocating conversion member 410 is rotatably mounted on the pin shaft 414, and the pin shaft 414 is fixed to the front housing 510.

[0037] In this embodiment, the interior of the connection frame 412 has a bottom groove wall 041 and two side groove walls 042 provided at opposite ends of the bottom groove wall 041. There is an arc section 043 between the side groove walls 042 and the bottom groove wall 041. The side groove walls 042 have an inclined surface section 0421 and an arc section 0422, and the inclined surface section 0421 is located between the arc section 043 and the arc section 0422.

[0038] In this embodiment, an interface pipe 540 is sleeved outside the main shaft 431 of the eccentric input shaft 430, and a second bearing 550 is installed between the main shaft 431 and the interface pipe 540.

[0039] The other end of the main shaft 431 in the eccentric input shaft 430 is used to connect with the rotating shaft of an external driving motor. When the driving motor is started to rotate, it drives the main shaft 431 to rotate, and then drives the eccentric column 432 to perform eccentric rotation. During this process, the eccentric column 432 has reciprocating movement in the vertical direction. Under the action of the first bearing 420, it drives the connecting frame 412 to reciprocate in the vertical direction. The reciprocating conversion member 410 is rotatably installed on the pin shaft 414, so that the connecting column 411 makes reciprocating movement, pulls the transmission shaft 200 to make reciprocating movement, and then drives the saw blade assembly to perform reciprocating telescopic movement in the outer tube 310 for sawing and grinding bone tissue. Under such reciprocating telescopic movement, whether the bone knife is held vertically or obliquely, the position of the bone tissue processed by the saw blade 110 is uniformly stressed, the saw cut wound surface is neat, effectively improving the processing effect of bone tissue grinding or repair, and also facilitating the control of the depth and width of the saw cut.

[0040] In this embodiment, in order to prevent the wheel surface of the first bearing 420 from interfering with the inner wall of the connecting frame 412 with an inclination angle change during the transmission process, inclined plane segments 0421 with a higher outer side and a lower inner side are symmetrically arranged at both ends of the bottom groove wall 041. The slope of the inclined plane segment 0421 is 5 - 20°. In order to fully avoid interference, an arc segment 043 is provided between the lower end of the inclined plane segment 0421 and the bottom groove wall 041. In order to reduce the resistance of surface-to-surface contact during the movement process, and at the same time avoid transmission gaps and reduce the vibration caused by crosstalk to improve the transmission quality, an arc segment 0422 communicating with the opening of the connecting frame 412 is provided at the higher end of the inclined plane segment 0421.

[0041] In this embodiment, the bone knife further includes a front housing 510, a rear housing 520 and a spiral water cooling sleeve 530. The rear housing 520 is sleeved on the spiral water cooling sleeve 530. There is a third water injection channel between the outer wall of the spiral water cooling sleeve 530 and the inner wall of the rear housing 520. Specifically, a spiral channel 531 is provided on the outer wall of the spiral water cooling sleeve 530. The spiral channel and the inner wall of the rear housing 520 are hermetically formed into the third water injection channel. One end of the front housing 510 is inserted into the rear housing 520. The front housing 510 has a water injection cavity 511, and the water injection cavity 511 is communicated with the third water injection channel. Specifically, a water injection through groove 512 is provided on the front housing 510. The water inlet end of the water injection through groove 512 is communicated with the third water injection channel, and the water outlet end of the water injection through groove is communicated with the water injection cavity 511. The outer tube 310 is inserted into the front housing 510 and sealed with glue. The second water injection channel 002 is communicated with the water injection cavity 511. Specifically, a stepped hole 311 is provided inside one end of the outer tube 310 inserted into the front housing 510. One end of the stepped hole 311 is communicated with the hollow interior of the outer tube 310, and the other end of the stepped hole 311 is communicated with the water injection cavity 511.

[0042] Please refer to Figure 9, in this embodiment, in order to further enhance the rigidity strength of the transmission shaft 200, a support pipe 320 is sleeved on the transmission shaft 200. The support pipe 320 is located inside the outer pipe 310. One side of the support pipe 320 has a second flat side 321, and the gap between the second flat side 321 and the inner wall of the outer pipe 310 forms a part of the second water injection channel 002.

[0043] In this embodiment, a sealing bushing 610 is inserted into the inner part of the end of the support pipe 320 far from the saw blade assembly. The end of the sealing bushing 610 far from the saw blade assembly is hermetically connected to the inner wall of the front housing 510 by glue. A closing pipe 620 is further arranged inside the end of the support pipe 320 far from the saw blade assembly. One end of the closing pipe 620 is sleeved on the transmission shaft 200, and the other end is sleeved on the sealing bushing 610.

[0044] For the bone saw of the present utility model, water is injected into the spiral channel 531 of the spiral water-cooling sleeve 530 through an external water injection mechanism. The injected water flows into the water injection through groove 512 via the spiral channel 531, and then into the water injection cavity 511, enters the second water injection channel 002 inside the outer pipe 310, then enters the first water injection channel 001 inside the saw handle 130, and finally flows out from the end face of the saw blade seat 120, so as to flush and cool the sawing position and improve the surgical efficiency.

[0045] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A surgical osteotome, characterized in that: It comprises a saw blade assembly and a transmission shaft connected to the saw blade assembly, wherein the saw blade assembly comprises a saw blade with saw teeth, a saw blade seat and a saw handle, wherein the saw blade is inserted into the saw blade seat, the saw handle is sleeved on the outer side of the saw blade seat, and the transmission shaft is connected to the saw blade seat; The bone knife also includes an adapter assembly that drives the saw blade assembly to perform reciprocating and telescopic motion. The adapter assembly includes a reciprocating conversion member, a first bearing and an eccentric input shaft. The reciprocating conversion member is capable of rotating. The first bearing is installed in the reciprocating conversion member. The eccentric input shaft includes a main shaft and an eccentric column fixed to one end of the main shaft. The eccentric column is eccentrically arranged with the main shaft. The eccentric column is inserted in the first bearing. The reciprocating conversion member is connected to the transmission shaft. The main shaft is eccentrically arranged with the transmission shaft. The transmission shaft and the main shaft are respectively located on opposite sides of the reciprocating conversion member. The reciprocating conversion member cooperates with the first bearing to convert the unidirectional rotation of the eccentric input shaft into reciprocating and telescopic motion of the transmission shaft.

2. The surgical osteotome according to claim 1, characterized in that: The saw blade seat has an inserting groove, and one end of the saw blade is inserted in the inserting groove; the saw blade is provided with a limiting strip, and the saw blade seat has a clamping groove, and the limiting strip is embedded in the clamping groove.

3. The surgical osteotome according to claim 1, characterized in that: At least one side of the saw blade seat is provided with a first flat square, and a first water injection channel is provided between the first flat square and the inner wall of the saw handle.

4. The surgical osteotome according to claim 3, characterized in that: An outer tube is sleeved on the transmission shaft, a second water injection channel is provided between the outer tube and the transmission shaft, and the second water injection channel is communicated with the first water injection channel.

5. The surgical osteotome according to claim 4, characterized in that: A connecting block is fixed to one end of the transmission shaft away from the saw blade assembly. The connecting block has a connecting groove. The reciprocating conversion member has a connecting column at a position corresponding to the connecting groove. The connecting column is embedded in the connecting groove.

6. The surgical osteotome according to claim 5, characterized in that: The reciprocating conversion member has a connecting frame at one end facing the eccentric input shaft, and the outer wall of the first bearing is in contact with the inner wall of the connecting frame.

7. The surgical osteotome according to claim 6, characterized in that: The bone cutter also includes a front shell, a rear shell and a spiral water-cooling jacket. The rear shell is sleeved on the spiral water-cooling jacket. A third water injection channel is provided between the spiral water-cooling jacket and the inner wall of the rear shell. One end of the front shell is inserted into the rear shell. A water injection cavity is provided in the front shell. The water injection cavity is connected to the third water injection channel. The outer tube is inserted into the front shell. The second water injection channel is connected to the water injection cavity.

8. The surgical osteotome according to claim 7, characterized in that: A support tube is sleeved on the transmission shaft, and the support tube is located inside the outer tube. One side of the support tube has a second flat square, and the gap between the second flat square and the inner wall of the outer tube constitutes a part of the second water injection channel.

9. The surgical osteotome according to claim 8, characterized in that: A sealing bushing is inserted into the interior of the end of the support tube away from the saw blade assembly, and the end of the sealing bushing away from the saw blade assembly is sealed with the inner wall of the front shell body. A closing tube is also arranged in the end of the support tube away from the saw blade assembly, one end of the closing tube is sleeved on the transmission shaft, and the other end is sleeved on the sealing bushing.

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