Bone crushing device

Abstract

The application provides a bone crushing device, which comprises a shell, a first bone crushing structure and a second bone crushing structure, the shell is internally provided with a bone crushing channel, the bone crushing channel has an inlet end and an outlet end, the first bone crushing structure is arranged on the side wall of the bone crushing channel, the first bone crushing structure has a plurality of first hinge teeth, and each first hinge tooth is arranged towards the inner side of the bone crushing channel; the second bone crushing structure is rotatably connected to the side wall of the bone crushing channel, the second bone crushing structure has a plurality of second hinge teeth, and the second hinge teeth and the first hinge teeth are alternately arranged; when the second bone crushing structure rotates, the second hinge teeth can form a shearing action with the first hinge teeth. The bone crushing device of the application drives the second hinge teeth to form shearing with the first hinge teeth through the rotation of the second bone crushing structure, so as to refine the bone material to be crushed, thereby obtaining bone graft particles meeting the requirements of reimplantation. Compared with the traditional bone rongeur, the bone crushing device of the application is simpler to operate, more convenient to use, faster to obtain bone graft particles and higher in efficiency.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and more specifically, relates to a bone-crushing device. Background Technology

[0002] In the surgical treatment of various scoliosis and kyphosis deformities, correcting the deformity is the first step to surgical success, while a robust internal fixation system is the key to surgical success. A robust internal fixation system initially relies on the fixation of the spinal screw-rod system, but maintaining the long-term corrective effect depends on bone graft fusion between the vertebral bodies and between the posterior laminae of the spine. Therefore, during the surgical procedure, it is often necessary to implant a large amount of autologous bone and / or allogeneic bone between the osteotomy gaps and / or between the posterior laminae of the spine to promote bony fusion between the vertebral bodies fixed in the osteotomy gaps and / or long segments, ensuring the stability of the fixed spinal segment structure, firmly maintaining the corrective effect, and reducing the risk of pseudoarthrosis and screw / rod breakage during mid- to long-term follow-up.

[0003] Whether it's intervertebral bone grafting or posterior interlaminar bone grafting, appropriately sized bone graft particles promote faster absorption and fusion by the body. However, the autologous bone blocks removed during surgery using bone chisels or ultrasonic bone scalpels are often large and uneven in size. Furthermore, due to the large number of bone blocks required, surgeons often need to spend considerable time and effort using bone forceps to break the bone blocks into small particles before reinserting them into the implant, resulting in a significant waste of surgical time and manpower in obtaining the bone graft particles. Additionally, because the bone graft particles are manually trimmed, it's difficult to obtain appropriately sized and uniform particles, which is detrimental to the body's absorption and fusion of the bone graft particles. Summary of the Invention

[0004] The purpose of this application is to provide a bone fragmentation device to solve the technical problems of low efficiency, cumbersome operation, and time consumption in the prior art when obtaining bone graft particles during surgery.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A bone-crushing device is provided, comprising a housing, a first bone-crushing structure, and a second bone-crushing structure. The housing contains a bone-crushing channel with an inlet and an outlet. The first bone-crushing structure is disposed on the sidewall of the bone-crushing channel and has a plurality of first hinge teeth, each of which is arranged facing inwards towards the bone-crushing channel. The second bone-crushing structure is rotatably connected to the sidewall of the bone-crushing channel and has a plurality of second hinge teeth, which are alternately arranged with the first hinge teeth. When the second bone-crushing structure rotates, the second hinge teeth can perform a shearing action with the first hinge teeth.

[0007] As a further improvement to the above technical solution:

[0008] It also includes a shear interval adjustment structure disposed on the side wall of the bone fragmentation channel, the second bone fragmentation structure being mounted on the shear interval adjustment structure, the second bone fragmentation structure being able to move along the length or width direction of the bone fragmentation channel to adjust the shear interval formed by the second hinge tooth and the first hinge tooth.

[0009] The shearing interval adjustment structure includes an adjustment hole provided on the side wall of the bone fragment channel, and a limiting member installed on the second bone fragment structure. The second bone fragment structure is rotatably installed on the adjustment hole, and the limiting member is used to limit the second bone fragment structure to a predetermined position in the adjustment hole.

[0010] The second bone-crushing structure includes a rotating shaft, with each of the second hinge teeth spaced apart from each other on the rotating shaft about its axial direction, and the rotating shaft being rotatably mounted in the adjustment hole.

[0011] The first bone fragmentation structure includes a base mounted on the housing, a bone fragmentation channel extending through the base, and each of the first hinge teeth connected to the base and arranged facing the inside of the bone fragmentation channel.

[0012] The housing includes a top cover, a middle section of the housing, and a base connected in sequence. The bone fragmentation channel is located in the middle section of the housing. The top cover is hinged to the first end of the middle section of the housing, and the base is hinged to the second end of the middle section of the housing.

[0013] It also includes a sieve bone member detachably connected to the base, the sieve bone member being located at the outlet end of the bone fragmentation channel.

[0014] It also includes a bone container detachably connected to the base, the bone container being located below the bone sieve.

[0015] The top cover is also provided with a bone-pressing structure, which includes a telescopic drive member that is telescopically connected to the top cover and a bone-pressing member that is pulverizedly connected to the telescopic drive member. The bone-pressing member is located at the inlet end of the bone-crushing channel.

[0016] It also includes a drive device, which is connected in a transmission manner to the second bone fragment structure and is detachably connected to the second bone fragment structure.

[0017] The beneficial effects of the bone-crushing device provided in this application are as follows:

[0018] This application provides a bone-crushing device, comprising a housing, a first bone-crushing structure, and a second bone-crushing structure. The housing contains a bone-crushing channel with an inlet and an outlet. The first bone-crushing structure is disposed on the sidewall of the bone-crushing channel and has multiple first hinge teeth, each facing inwards towards the bone-crushing channel. The second bone-crushing structure is rotatably connected to the sidewall of the bone-crushing channel and has multiple second hinge teeth, which are alternately arranged with the first hinge teeth. When the second bone-crushing structure rotates, the second hinge teeth can shear against the first hinge teeth. The housing serves as the mounting base for the first and second bone-crushing structures. A bone-crushing channel penetrates the housing. Specifically, the bone-crushing channel can be a horizontal channel or a vertical channel. When the bone-crushing channel is vertical, its upper end is the inlet end, and its lower end is the outlet end. The aggregate to be crushed falls out of the bone-crushing channel along the direction of gravity after being crushed by the first and second bone-crushing structures. The sidewall of the bone fragmentation channel is provided with multiple first hinge teeth, and the second bone fragmentation structure is provided with multiple second hinge teeth. When the second bone fragmentation structure rotates, it drives the second hinge teeth to perform a circular motion. When the second hinge teeth pass through the first hinge teeth that are arranged alternately with them, the second hinge teeth and the first hinge teeth form a shearing action, shearing and crushing the aggregate to be crushed, so that large pieces of aggregate to be crushed are broken into bone graft particles that meet the requirements for replantation.

[0019] The bone-crushing device of this application, through the rotation of the second bone-crushing structure, drives the second hinge tooth to form a shearing action with the first hinge tooth, thereby refining the bone material to be crushed and obtaining bone graft particles that meet the requirements for reimplantation. Compared with traditional bone-crushing forceps, the bone-crushing device of this application is simpler to operate, more convenient to use, and obtains bone graft particles faster and more efficiently. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the main structure of the bone-crushing device provided in this application;

[0022] Figure 2 A first cross-sectional structural schematic diagram of the bone-crushing device provided in this application;

[0023] Figure 3 A side view of the bone-crushing device provided in this application;

[0024] Figure 4 A second cross-sectional view of the bone-crushing device provided in this application;

[0025] Figure 5 A first three-dimensional structural schematic diagram of the bone-crushing device provided in this application;

[0026] Figure 6 A second three-dimensional structural schematic diagram of the bone-crushing device provided in this application;

[0027] Figure 7 A third perspective structural diagram of the bone-crushing device provided in this application;

[0028] Figure 8 A schematic diagram of the bone-crushing device provided in this application in its first usage state.

[0029] Figure 9 A schematic diagram of the second usage state of the bone-crushing device provided in this application;

[0030] Figure 10 A schematic diagram of the first disassembled structure of the bone-crushing device provided in this application;

[0031] Figure 11 A schematic diagram of the second disassembled structure of the bone-crushing device provided in this application;

[0032] Figure 12 A three-dimensional structural diagram of the first and second bone-fragmenting structures of the bone-fragmenting device provided in this application;

[0033] Figure 13 A top view of the first and second bone-fragmenting structures of the bone-fragmenting device provided in this application;

[0034] Figure 14 A three-dimensional structural diagram of the first bone-crushing structure of the bone-crushing device provided in this application;

[0035] Figure 15 A first cross-sectional view of the first bone-crushing structure of the bone-crushing device provided in this application;

[0036] Figure 16 A second cross-sectional view of the first bone-crushing structure of the bone-crushing device provided in this application;

[0037] Figure 17 A top view schematic diagram of the first bone-crushing structure of the bone-crushing device provided in this application;

[0038] Figure 18 A three-dimensional structural diagram of the second bone-crushing structure of the bone-crushing device provided in this application;

[0039] Figure 19 A top view schematic diagram of the second bone-crushing structure of the bone-crushing device provided in this application;

[0040] Figure 20 A side view of the second bone-crushing structure of the bone-crushing device provided in this application;

[0041] Figure 21 A schematic diagram of the first shearing zone of the bone-crushing device provided in this application;

[0042] Figure 22 A schematic diagram of the second shearing zone of the bone-crushing device provided in this application;

[0043] Figure 23 A schematic diagram of the third shearing zone of the bone-crushing device provided in this application;

[0044] Figure 24 A schematic diagram of the fourth shearing zone of the bone-crushing device provided in this application;

[0045] Figure 25 A schematic diagram of the fifth shearing zone of the bone-crushing device provided in this application;

[0046] Figure 26 This is a schematic diagram of the sixth shearing zone of the bone-crushing device provided in this application.

[0047] The following are the labeling elements in the figure:

[0048] 1. Shell; 11. Bone fragmentation channel; 12. Top cover; 13. Middle section of shell; 14. Base; 2. First bone fragmentation structure; 21. First hinge tooth; 22. Base; 3. Second bone fragmentation structure; 31. Second hinge tooth; 32. Rotating shaft; 4. Adjustment hole; 5. Limiting component; 6. Bone sieve component; 7. Bone container; 8. Bone pressing structure; 81. Telescopic drive component; 82. Bone pressing component; 9. Drive device; 10. Bearing. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0050] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0053] like Figures 1 to 5 As shown, this application provides a bone-crushing device, including a housing 1, a first bone-crushing structure 2, and a second bone-crushing structure 3. The housing 1 is provided with a bone-crushing channel 11, which has an inlet end and an outlet end. The first bone-crushing structure 2 is disposed on the side wall of the bone-crushing channel 11 and has a plurality of first hinge teeth 21, each of which is arranged facing the inner side of the bone-crushing channel 11. The second bone-crushing structure 3 is rotatably connected to the side wall of the bone-crushing channel 11 and has a plurality of second hinge teeth 31, which are arranged alternately with the first hinge teeth 21. When the second bone-crushing structure 3 rotates, the second hinge teeth 31 can form a shearing action with the first hinge teeth 21.

[0054] The shell 1 serves as the mounting base for the first bone-crushing structure 2 and the second bone-crushing structure 3. A bone-crushing channel 11 penetrates the shell 1. Specifically, the bone-crushing channel 11 can be a horizontal channel or a vertical channel. When the bone-crushing channel 11 is a vertical channel, its upper end is the inlet end, and its lower end is the outlet end. After being crushed by the first bone-crushing structure 2 and the second bone-crushing structure 3, the aggregate falls out of the bone-crushing channel 11 along the direction of gravity.

[0055] The sidewall of the bone fragmentation channel 11 is provided with multiple first hinge teeth 21, and the second bone fragmentation structure 3 is provided with multiple second hinge teeth 31. When the second bone fragmentation structure 3 rotates, it drives the second hinge teeth 31 to perform circular motion. When the second hinge teeth 31 pass through the first hinge teeth 21 that are arranged alternately with them, the second hinge teeth 31 and the first hinge teeth 21 form a shearing action, shearing and crushing the aggregate to be crushed, so that large pieces of aggregate to be crushed are crushed into bone graft particles that meet the requirements for replantation.

[0056] The bone-crushing device of this application, through the rotation of the second bone-crushing structure 3, drives the second hinge tooth 31 to form a shearing action with the first hinge tooth 21, thereby refining the bone material to be crushed and obtaining bone graft particles that meet the requirements for reimplantation. Compared with traditional bone-crushing forceps, the bone-crushing device of this application is simpler to operate, more convenient to use, and obtains bone graft particles faster and more efficiently.

[0057] In one embodiment of this application, a shear interval adjustment structure is further provided on the side wall of the bone fragmentation channel 11. The second bone fragmentation structure 3 is installed on the shear interval adjustment structure. The second bone fragmentation structure 3 can move along the length or width direction of the bone fragmentation channel 11 to adjust the shear interval formed by the second hinge tooth 31 and the first hinge tooth 21.

[0058] The shearing range refers to the area within which the second bone-crushing structure 3 extends into the first bone-crushing structure 2 during operation of the bone-crushing device, and the first hinge tooth 21 and the second hinge tooth 31 can form a shearing action. The installation position of the second bone-crushing structure 3 is adjusted by the shearing range adjustment structure, thereby changing the shearing depth and frequency between the second bone-crushing structure 3 and the first hinge tooth 21. A larger shearing range results in a greater shearing depth and frequency, leading to more complete shearing of the aggregate and finer bone particles. Conversely, a smaller shearing range results in a lower shearing rate of the aggregate and coarser bone particles.

[0059] Since both the first bone fragment structure 2 and the second bone fragment structure 3 are spatial solid structures, this range is actually a spatial range. For ease of explanation and analysis, this range can also be projected as a planar range along the rotation axis of the second bone fragment structure 3 using a projection method.

[0060] like Figure 21 As shown, the second bone fragment structure 3 is installed in the central initial position, with a shearing interval of a0. When the second bone fragment structure 3 can move along the length direction (i.e., the vertical direction) of the bone fragment channel 11... Figure 22 As shown, when the second bone fragment structure 3 moves upward, the shearing interval is a1. The portion of the second bone fragment structure 3 protruding beyond the first bone fragment structure 2 increases, increasing the contact area between the second bone fragment structure 3 and the aggregate to be crushed. This increases the initial amount of bone fragments formed by the aggregate passing through the second bone fragment structure 3, which helps the shearing interval to shear the bone fragments, resulting in finer bone particles after crushing. Figure 23 As shown, when the second bone fragment structure 3 moves downward, the shearing interval is a2. The second bone fragment structure 3 is trapped in the first bone fragment structure 2, and the contact area between the second bone fragment structure 3 and the aggregate to be crushed is reduced, resulting in coarser crushed bone particles and a slower crushing speed.

[0061] like Figure 24As shown, the second bone fragment structure 3 is installed in the central initial position, with a shearing interval of a3. The second bone fragment structure 3 can move along the width direction (i.e., the horizontal direction) of the bone fragment channel 11. Figure 25 As shown, when the second bone fragmentation structure 3 moves closer to the side where the aggregate to be crushed enters the first bone fragmentation structure 2, the shearing interval is a4. The shearing depth and shearing frequency of the second bone fragmentation structure 3 and the first bone fragmentation structure 2 are greater. After adjustment by the shearing interval adjustment structure, finer crushed bone particles are obtained. Figure 26 As shown, when the second bone fragmentation structure 3 moves away from the side where the aggregate to be crushed enters the first bone fragmentation structure 2, the shear depth between the second bone fragmentation structure 3 and the first bone fragmentation structure 2 is smaller, and the shearing frequency is lower. After adjustment by the shear interval adjustment structure, relatively coarse crushed bone particles are obtained.

[0062] like Figure 10 and Figure 11 ,as well as Figures 21 to 26 As shown, in one embodiment of this application, the shear interval adjustment structure includes an adjustment hole 4 provided on the side wall of the bone fragment channel 11, and a limiting member 5 installed on the second bone fragment structure 3. The second bone fragment structure 3 is rotatably installed on the adjustment hole 4, and the limiting member 5 is used to limit the second bone fragment structure 3 to a predetermined position in the adjustment hole 4.

[0063] The adjustment hole 4 is a waist-shaped hole to facilitate adjustment of the installation position of the second bone fragment structure 3. Specifically, the adjustment hole 4 can be located on the housing 1 or on the first bone fragment structure 2. The limiting member 5 is installed on the second bone fragment structure 3 to ensure that the second bone fragment structure 3 can rotate normally and to limit the installation position of the second bone fragment structure 3 so that the second bone fragment structure 3 maintains normal operation in the predetermined position.

[0064] The limiting member 5 can specifically be a lock nut. The second fragmentation structure 3 is rotatably connected to the limiting member 5 via a mounting bearing 10. The limiting member 5 is installed at one or both ends of the second fragmentation structure 3, clamping the second fragmentation structure 3 to limit it to a predetermined position in the adjusting hole 4, and maintaining the rotation of the second fragmentation structure 3 relative to the limiting member 5 via the bearing 10. The bearing 10 can specifically be a thrust ball bearing, an angular contact ball bearing, etc. Thrust ball bearings and angular contact ball bearings can withstand axial loads, or simultaneously withstand radial and axial loads.

[0065] In other embodiments, the limiting member 5 may specifically be a movable bearing seat, and the shearing interval formed by the second hinge tooth 31 and the first hinge tooth 21 can be adjusted by adjusting the installation position of the bearing seat.

[0066] like Figures 18 to 20As shown, in one embodiment of this application, the second bone fragmentation structure 3 includes a rotating shaft 32, and each second hinge tooth 31 is connected to the rotating shaft 32 at intervals around the axial direction of the rotating shaft 32. The rotating shaft 32 is rotatably mounted in the adjustment hole 4.

[0067] The rotating shaft 32 serves as the mounting carrier for the second hinge tooth 31, and its rotation drives the second hinge tooth 31 to perform circular motion. Both ends of the rotating shaft 32 are rotatably mounted on the adjustment holes 4. The axial direction of the rotating shaft 32 is perpendicular to the length direction of the bone fragmentation channel 11 (from the inlet end to the outlet end).

[0068] The second reamer tooth 31 is a moving cutting tooth used to cut the aggregate to be crushed. Each second reamer tooth 31 is connected to the cylindrical surface of the rotating shaft 32 at intervals around its axial direction. The second reamer teeth 31 can also be arranged in a spiral pattern on the cylindrical surface of the rotating shaft 32. The second reamer teeth 31 have sharp cutting tips and sharp cutting edges. Specifically, the rake angle of the second reamer tooth 31 ranges from -5° to 5°; the clearance angle ranges from 5° to 30°; the principal cutting edge angle ranges from 30° to 90°; the secondary cutting edge angle ranges from 10° to 15°; and the inclination angle ranges from -10° to 0°.

[0069] Due to the structural characteristics of the first bone fragmentation structure 2 and the second bone fragmentation structure 3, after the crushed aggregate falls into the bone fragmentation channel 11, it first contacts the second bone fragmentation structure 3. The rotation of the second bone fragmentation structure 3 engages the aggregate to be crushed and drags it into the shearing zone for crushing. In addition to shearing with the first hinge tooth 21, the second hinge tooth 31 can also scrape the aggregate to be crushed with its sharp tip when the aggregate just contacts the second hinge tooth 31 (i.e., before the second hinge tooth 31 enters the shearing zone), pre-peeling off some bone fragments so that it can enter the shearing zone for further shearing and crushing.

[0070] like Figures 14 to 17 As shown, in one embodiment of this application, the first bone fragmentation structure 2 includes a base 22 installed on the housing 1, a bone fragmentation channel 11 extending through the base 22, and each first hinge tooth 21 connected to the base 22 and arranged facing the inner side of the bone fragmentation channel 11.

[0071] The base 22 serves as the mounting carrier for the first hinge tooth 21. The base 22 can be a mounting component independent of the housing 1, or it can be detachably connected to the housing 1. Alternatively, the base 22 can be an integrally connected component to the housing 1.

[0072] The first reamer tooth 21 is fixedly connected to the base 22. The first reamer tooth 21 is a fixed cutting tooth used to cooperate with the second reamer tooth 31 to cut the aggregate to be crushed. The first reamer tooth 21 and the second reamer tooth 31 are arranged alternately, and when the rotating shaft 32 rotates, the second reamer tooth 31 passes through the gap between each of the first reamer teeth 21. The first reamer tooth 21 also has a sharp cutting tip and a sharp cutting edge. Specifically, the rake angle of the first reamer tooth 21 is between -5° and 5°; the clearance angle of the first reamer tooth 21 is between 5° and 30°; the principal rake angle of the first reamer tooth 21 is between 30° and 90°; the secondary rake angle of the first reamer tooth 21 is between 10° and 15°; and the inclination angle of the first reamer tooth 21 is between -10° and 0°.

[0073] In one embodiment of this application, the front cutting surface of the first hinge tooth 21 in the top row is an oblique cutting surface. The lower end of the oblique cutting surface is located on the side close to the bone fragment channel 11, and the upper end of the oblique cutting surface is located on the side away from the bone fragment channel 11. The oblique cutting surface can act as a stop for the aggregate to be crushed, preventing larger bone fragments from entering the shearing zone and causing jamming between the first hinge tooth 21 and the second hinge tooth 31.

[0074] like Figure 8 and Figure 9 As shown, in one embodiment of this application, the housing 1 includes a top cover 12, a housing middle section 13 and a base 14 connected in sequence. The bone fragmentation channel 11 is disposed in the housing middle section 13. The top cover 12 is hinged to the first end of the housing middle section 13 and the base 14 is hinged to the second end of the housing middle section 13.

[0075] The top cover 12 is located at the upper end (inlet end) of the bone crushing channel 11, which is also the first end of the middle section 13 of the shell; the base 14 is located at the lower end (outlet end) of the bone crushing channel 11, which is also the second end of the middle section 13 of the shell. The top cover 12 and the middle section 13 of the shell are hinged together by a first hinge, which allows the top cover 12 to rotate around the first hinge to open the top cover 12, facilitating the feeding of the aggregate to be crushed into the inlet end of the bone crushing channel 11. The base 14 and the middle section 13 of the shell are hinged together by a second hinge, which allows the top cover 12 and the middle section 13 of the shell to rotate together around the second hinge to open the base 14, facilitating the removal of the sieve bone component 6 from the base 14.

[0076] like Figure 9 and Figure 10 As shown, in one embodiment of this application, a sieve bone member 6 is detachably connected to the base 14 and is located at the outlet end of the bone fragmentation channel 11.

[0077] The bone sieve 6 is used to screen the bone graft particles that fall from the outlet of the bone crushing channel 11 into the bone sieve 6. Specifically, the bottom of the bone sieve 6 is a screen for screening the bone graft particles. The screen mesh size should be selected as 2mm x 2mm, 3mm x 3mm, etc., to screen out bone graft particles of the size of mung beans or rice grains (2mm-3mm), so as to obtain bone graft particles that meet the requirements of bone grafting and are relatively uniform in size. The screened bone graft particles fall into the bone collection dish 7 below. Bone graft particles that do not pass through the screen remain on top of the screen. The bone graft particles remaining on top of the screen can be poured back into the inlet of the bone crushing channel 11 for further crushing to make full use of the bone material.

[0078] like Figure 10 As shown, the sieve member 6 is inserted into and connected to the base 14. The sieve member 6 can be inserted into or removed from the base 14, and it also has the advantages of easy disassembly, storage, and cleaning. In other embodiments, the sieve member 6 is connected to the base 14 by snap-fit, nesting, or other connection methods, which is also an embodiment in which the sieve member 6 is detachably connected to the base 14, and is also within the scope of protection of this application.

[0079] like Figure 10 As shown, in one embodiment of this application, the sieve member 6 further includes a baffle connected above the sieve screen. The baffle increases the accommodating space above the sieve screen, facilitating the collection of sheared bone particles and accommodating bone particles that have not passed through the sieve screen.

[0080] like Figure 10 and Figure 11 As shown, in one embodiment of this application, a bone container 7 is detachably connected to the base 14 and is located below the bone sieve 6.

[0081] The bone-holding dish 7 is a container for receiving bone graft particles, and the bone graft particles sieved by the bone-sieving component 6 fall into the bone-holding dish 7. Specifically, one side of the base 14 has an opening through which the bone-holding dish 7 is inserted into or removed from the base 14.

[0082] like Figure 2 and Figure 10 As shown, in one embodiment of this application, the top cover 12 is further provided with a bone-pressing structure 8. The bone-pressing structure 8 includes a telescopic drive member 81 that is telescopically connected to the top cover 12 and a bone-pressing member 82 that is pulverically connected to the telescopic drive member 81. The bone-pressing member 82 is located at the inlet end of the bone-crushing channel 11.

[0083] The compression structure 8 is used to compress the aggregate to be crushed placed at the inlet end of the aggregate crushing channel 11, making the aggregate to be crushed adhere tightly to the first aggregate crushing structure 2 and the second aggregate crushing structure 3, preventing the second aggregate crushing structure 3 from spinning freely. The telescopic drive component 81 can specifically be a screw threadedly connected to the top cover 12, which drives the compression component 82 to rise and fall by rotating the screw. In other embodiments, the telescopic drive component 81 can also be an electric push rod, a hydraulic / pneumatic cylinder, etc. The compression component 82 is specifically a pressure plate used to press against the aggregate to be crushed. By applying pressure to the aggregate to be crushed through the compression component 82, the aggregate to be crushed adheres tightly to the first aggregate crushing structure 2 and the second aggregate crushing structure 3.

[0084] like Figure 6 and Figure 7 As shown, in one embodiment of this application, a driving device 9 is further included. The driving device 9 is connected to the second bone fragment structure 3 in a transmission manner and is detachably connected to the second bone fragment structure 3.

[0085] The drive unit 9 is used to drive the second bone fragmentation structure 3. Specifically, the drive unit 9 can be a manually driven handle, crank wheel, etc. Figure 5 As shown, one end of the rotating shaft 32 is provided with a connecting thread, and the crank handle / rocker wheel is provided with a corresponding threaded hole. One end of the rotating shaft 32 is threadedly connected to the crank handle / rocker wheel. By manually turning the crank handle / rocker wheel, the rotating shaft 32 is driven to rotate, thereby realizing the operation of the second bone-crushing structure 3. After use, the crank handle / rocker wheel can be removed from the rotating shaft 32 for easy storage and cleaning of the bone-crushing device.

[0086] The drive unit 9 can also be an electric bone drill, an electric motor, etc. For example... Figure 5 As shown, one end of the rotating shaft 32 has a clamping surface parallel to the axial direction of the rotating shaft 32. The drill chuck of the electric bone drill is clamped on the clamping surface. The rotation of the electric bone drill drives the rotating shaft 32 to rotate, realizing the operation of the second bone fragmentation structure 3. After use, the drill chuck can be released and the electric bone drill can be removed from the rotating shaft 32 for easy storage and cleaning of the bone fragmentation device.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bone-crushing device, characterized in that, The device includes a shell (1), a first bone-fragmenting structure (2), and a second bone-fragmenting structure (3). The shell (1) has a bone-fragmenting channel (11) with an inlet and an outlet. The first bone-fragmenting structure (2) is located on the side wall of the bone-fragmenting channel (11) and has multiple first hinge teeth (21), each of which is arranged facing the inside of the bone-fragmenting channel (11). The second bone-fragmenting structure (3) is rotatably connected to the side wall of the bone-fragmenting channel (11) and has multiple second hinge teeth (31), which are arranged alternately with the first hinge teeth (21). When the second bone-fragmenting structure (3) rotates, the second hinge teeth (31) can form a shearing action with the first hinge teeth (21). It also includes a shear interval adjustment structure disposed on the side wall of the bone fragmentation channel (11), the second bone fragmentation structure (3) is installed on the shear interval adjustment structure, the second bone fragmentation structure (3) can move along the length direction of the bone fragmentation channel (11) to adjust the shear interval formed by the second hinge tooth (31) and the first hinge tooth (21); the bone fragmentation channel (11) is a vertical channel, and the length direction of the bone fragmentation channel (11) is vertical; When the second bone fragment structure (3) moves upward, the portion of the second bone fragment structure (3) protruding from the first bone fragment structure (2) increases, the contact area between the second bone fragment structure (3) and the aggregate to be crushed increases, and the amount of initial bone fragmentation of the aggregate to be crushed increases after passing through the second bone fragment structure (3), so as to obtain finer crushed bone particles. When the second bone fragment structure (3) moves downward, the second bone fragment structure (3) sinks into the first bone fragment structure (2), and the contact area between the second bone fragment structure (3) and the aggregate to be crushed decreases, so as to obtain coarser crushed bone particles.

2. The bone-crushing device as described in claim 1, characterized in that, The shearing interval adjustment structure includes an adjustment hole (4) on the side wall of the bone fragment channel (11) and a limiting member (5) installed on the second bone fragment structure (3). The second bone fragment structure (3) is rotatably installed on the adjustment hole (4), and the limiting member (5) is used to limit the second bone fragment structure (3) to a predetermined position in the adjustment hole (4).

3. The bone-crushing device as described in claim 2, characterized in that, The second bone fragmentation structure (3) includes a rotating shaft (32), and each of the second hinge teeth (31) is connected to the rotating shaft (32) at intervals around the axial direction of the rotating shaft (32), and the rotating shaft (32) is rotatably mounted in the adjustment hole (4).

4. The bone-crushing device as described in claim 1, characterized in that, The first bone fragment structure (2) includes a base (22) installed on the housing (1), the bone fragment channel (11) is provided through the base (22), and each of the first hinge teeth (21) is connected to the base (22) and is arranged facing the inside of the bone fragment channel (11).

5. The bone-crushing device according to any one of claims 1 to 4, characterized in that, The housing (1) includes a top cover (12), a middle section (13) and a base (14) connected in sequence. The bone fragmentation channel (11) is located in the middle section (13). The top cover (12) is hinged to the first end of the middle section (13), and the base (14) is hinged to the second end of the middle section (13).

6. The bone-crushing device as described in claim 5, characterized in that, It also includes a sieve bone member (6) detachably connected to the base (14), the sieve bone member (6) being located at the outlet end of the bone fragment channel (11).

7. The bone-crushing device as described in claim 6, characterized in that, It also includes a bone container (7) detachably connected to the base (14), the bone container (7) being located below the bone sieve (6).

8. The bone-crushing device as described in claim 5, characterized in that, The top cover (12) is also provided with a bone-pressing structure (8), which includes a telescopic drive (81) that is telescopically connected to the top cover (12) and a bone-pressing component (82) that is pulverizedly connected to the telescopic drive (81). The bone-pressing component (82) is located at the inlet end of the bone-crushing channel (11).

9. The bone-crushing device according to any one of claims 1 to 4, characterized in that, It also includes a drive device (9), which is connected to the second bone fragment structure (3) in a transmission manner and is detachably connected to the second bone fragment structure (3).

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