Swing saw blade and swing saw

Abstract

The utility model discloses a saw blade of a swing saw and the swing saw. The saw blade of the swing saw comprises a saw blade body, the cutting part is used for cutting bone tissues and is arranged at one end of the saw blade body; the bone chip discharging channel is used for discharging crushed bone chips, an inlet of the bone chip discharging channel is formed in the position, close to the cutting part, of the surface of the saw blade body, and the bone chip discharging channel extends on the surface of the saw blade body in the direction away from the cutting part and forms an outlet; broken bone chips can be discharged through the bone chip discharging channel. According to the technical scheme, heat generated in the process of cutting the bone tissue of the human body is reduced, damage to the bone tissue of the human body caused by excessive heat generated in the cutting process is effectively avoided, and then it is guaranteed that the human body joint prosthesis is effectively combined with the reserved bone of the human body after being implanted.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an oscillating saw blade and an oscillating saw. Background Art

[0002] When joint diseases cannot be effectively treated with medication, artificial joint replacement becomes an option for improving joint-related health. During artificial joint replacement surgery, the diseased or damaged joint is surgically removed. Joint replacement surgical tools, including an electric oscillating saw for osteotomy, are used. The use of an oscillating saw greatly facilitates the surgeon's surgical procedures.

[0003] However, the forms and performance of oscillating saws on the market vary greatly. The biggest common disadvantage is that when using an oscillating saw to cut human bone tissue, the friction between the saw blade and the human bone tissue will generate a large amount of heat, causing the human bone cells and bone tissue in contact with the saw blade to suffer thermal damage, which in turn leads to the failure of the connection between the human joint prosthesis and the retained bone after implantation (especially non-bone cement fixed prostheses), causing the artificial joint prosthesis to loosen after implantation, seriously affecting the service life and performance of the joint prosthesis. This problem has a more obvious impact on the performance of non-bone cement fixed (biological fixation) joint prostheses. In order to increase the survival rate of artificial joint prostheses, solving the problem of saw blade heating during the cutting process of electric oscillating saws has become a key technical indicator in artificial joint prosthesis replacement surgery.

[0004] Therefore, it is necessary to propose an oscillating saw blade to solve the problem of damage to human bone tissue caused by heat during the cutting process of the existing oscillating saw. Utility Model Content

[0005] The utility model provides an oscillating saw blade to solve the problem that a large amount of heat is generated during the cutting process of human bone tissue by the existing oscillating saw, resulting in bone tissue damage, and further causing failure in the connection between the human joint prosthesis and the retained bone after implantation.

[0006] In order to solve the above technical problems and achieve the purpose of the present invention, the present invention provides a swing saw blade, comprising:

[0007] Saw blade body;

[0008] a cutting portion for cutting bone tissue, the cutting portion being disposed at one end of the saw blade body;

[0009] A bone chip discharge channel for discharging bone chips, wherein the entrance of the bone chip discharge channel is arranged on the surface of the saw blade body near the cutting portion, and the bone chip discharge channel extends on the surface of the saw blade body in a direction away from the cutting portion and forms an outlet, and bone chips can be discharged through the bone chip discharge channel.

[0010] Preferably, the bone chip discharge channel includes a first channel side wall and a second channel side wall arranged opposite to each other, and the first channel side wall and the second channel side wall include multiple connected bone chip collecting walls, and the bone chip collecting wall has a concave surface. When the oscillating saw is in the swinging state, the broken bone chips alternately enter the bone chip collecting walls in the first channel side wall and the second channel side wall, and are finally discharged from the outlet of the bone chip discharge channel.

[0011] Preferably, the concave surface includes an arc segment extending from the surface of the saw blade body to the edge of the saw blade body, and the bone chip collecting wall also includes a blocking wall connected to the arc segment, and the extension direction of the blocking wall is basically parallel to the extension direction of the cutting part. When the saw blade is in the swinging state, the broken bone chips are collected by the arc segment and accumulated on the blocking wall.

[0012] Preferably, the first channel side wall and the second channel side wall are staggered at a certain distance, so that when the saw blade swings, the broken bone chips in the upper bone chip collecting wall can enter the opposite lower bone chip collecting wall.

[0013] Preferably, the first channel side wall and the second channel side wall each include four sections of bone chip collecting walls.

[0014] Preferably, the cutting portion includes a row of upper saw teeth and a row of lower saw teeth, the upper saw teeth and the lower saw teeth are arranged alternately, and a chip groove is provided between any two adjacent saw teeth of the upper saw teeth and the lower saw teeth, and the chip groove is used to discharge bone chips cut by the saw.

[0015] Preferably, one or two bone chip discharge channels are provided on the upper surface of the saw blade body.

[0016] Preferably, the bone chip discharge channel is provided on both the upper surface and the lower surface of the saw blade body.

[0017] Preferably, a positioning portion for connecting to a driving member is provided on one end of the saw blade body away from the cutting portion.

[0018] In order to achieve the purpose of the present invention, the present invention further provides an oscillating saw, comprising any one of the oscillating saw blades provided by the present invention.

[0019] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0020] The utility model provides an oscillating saw blade, comprising a saw blade body, a cutting portion, and a bone chip discharge channel; the cutting portion is used to cut bone tissue and is arranged at one end of the saw blade body; the bone chip discharge channel is used to discharge bone chips, and the inlet of the bone chip discharge channel is arranged on the surface of the saw blade body near the cutting portion, and the bone chip discharge channel extends on the surface of the saw blade body in a direction away from the cutting portion and forms an outlet, so that bone chips can be discharged through the bone chip discharge channel. The utility model avoids the accumulation of bone chips in the cutting portion by providing the bone chip discharge channel, thereby reducing the generation of heat, and the bone chip discharge channel extends on the surface of the saw blade body. When the oscillating saw is working, some bone chips will be scattered on the contact surface between the saw blade body and the osteotomy plate, and the bone chips will roll between the two relatively moving surfaces, thereby converting the sliding friction between the saw blade body and the osteotomy plate into rolling friction, further reducing the generation of heat, and effectively preventing the excessive heat generated during the cutting process from damaging the human bone tissue, thereby ensuring the effective combination between the human joint prosthesis and the retained bone after implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of an oscillating saw blade according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the working state of an oscillating saw blade according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 100 - saw blade body; 110 - cutting portion; 111 - chip discharge groove; 120 - bone chip discharge channel; 121 - first channel side wall; 122 - second channel side wall; 123 - bone chip collection wall; 123A - concave surface; 123B - blocking wall; 130 - positioning portion;

[0025] 20-Osteotomy plate. DETAILED DESCRIPTION

[0026] The following is a further detailed description of an oscillating saw blade and an oscillating saw proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0027] See also Figure 1-Figure 2 , Figure 1 This is a schematic structural diagram of an oscillating saw blade according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the working state of an oscillating saw blade according to an embodiment of the present invention, wherein the oscillating saw blade comprises:

[0028] Saw blade body 100;

[0029] a cutting portion 110 for cutting bone tissue, the cutting portion 110 being disposed at one end of the saw blade body 100;

[0030] A bone chip discharge channel 120 is provided for discharging bone chips. The entrance of the bone chip discharge channel 120 is arranged on the surface of the saw blade body 100 near the cutting portion 110. The bone chip discharge channel 120 extends on the surface of the saw blade body 100 in a direction away from the cutting portion 110 and forms an outlet. Bone chips can be discharged through the bone chip discharge channel 120.

[0031] The present invention prevents bone chips from accumulating on the cutting portion 110 by providing the bone chip discharge channel 120, thereby reducing heat generation. The bone chip discharge channel 120 extends on the surface of the saw blade body 100. When the oscillating saw is working, some bone chips will be scattered on the contact surface between the saw blade body 100 and the osteotomy plate 20. The bone chips roll between the two relatively moving surfaces, thereby converting the sliding friction between the saw blade body 100 and the osteotomy plate 20 into rolling friction, further reducing heat generation, and effectively avoiding damage to human bone tissue caused by excessive heat generated during the cutting process, thereby ensuring effective combination between the human joint prosthesis and the retained bone after implantation.

[0032] In some embodiments, the bone chip discharge channel 120 includes a first channel side wall 121 and a second channel side wall 122 arranged opposite to each other. The first channel side wall 121 and the second channel side wall 122 include multiple connected bone chip collecting walls 123. The bone chip collecting wall 123 has a concave surface 123A. When the oscillating saw is in the swinging state, the broken bone chips alternately enter the bone chip collecting wall 123 in the first channel side wall 121 and the second channel side wall 122, and are finally discharged from the outlet of the bone chip discharge channel 120.

[0033] In the above embodiment, when the oscillating saw blade is in working condition, the cutting portion 110 swings back and forth along the extension direction of the cutting portion 110, and the bone chips move relative to the oscillating saw blade due to inertia, and are collected by the concave surface 123A on the first channel side wall 121 to the bone chip collecting wall 123 of the first channel side wall 121, and then during the next swing of the oscillating saw blade, are collected by the concave surface 123A of the second channel side wall 122 to the bone chip collecting wall 123 of the second channel side wall 122. The bone chips alternately enter the bone chip collecting walls 123 of the first channel side wall 121 and the second channel side wall 122, and are finally discharged from the outlet of the bone chip discharge channel 120.

[0034] In some embodiments, the concave surface 123A includes an arc segment extending from the surface of the saw blade body 100 to the edge of the saw blade body 100, and the bone chip collecting wall 123 also includes a blocking wall 123B connected to the arc segment. The extension direction of the blocking wall 123B is basically parallel to the extension direction of the cutting part 110. When the saw blade is in the swinging state, the broken bone chips are collected by the arc segment and accumulated on the blocking wall 123B.

[0035] In the above embodiment, the arc segment extends from the surface of the saw blade body 100 to the edge of the saw blade body 100, so that the concave surface 123A can collect more bone chips, thereby improving the chip discharge capacity of the bone chip discharge channel 120. When the oscillating saw blade is in working condition, the bone chips are collected by the arc segment to the blocking wall 123B due to inertia. The blocking wall 123B is basically parallel to the extension direction of the cutting part 110, so that the bone chips can be accumulated on the blocking wall 123B, so that the oscillating saw blade can move from the previous bone chip collection wall 123 relative to the saw blade body 100 to the next bone chip collection wall 123 when it swings next time.

[0036] In some embodiments, the first channel side wall 121 and the second channel side wall 122 are staggered by a certain distance, so that when the saw blade swings, the broken bone chips in the upper bone chip collecting wall 123 can enter the opposite lower bone chip collecting wall 123.

[0037] In the above embodiment, the first channel side wall 121 and the second channel side wall 122 are staggered by a certain distance. Figure 1 The first channel side wall 121 and the second channel side wall 122 are staggered by half the axial length of the bone chip collecting wall 123 of the saw blade body 100, so that the bone chip collecting wall 123 of the first channel side wall 121 and the bone chip collecting wall 123 of the second channel side wall 122 are staggered on the surface of the saw blade body 100.

[0038] In some embodiments, each of the first channel sidewall 121 and the second channel sidewall 122 includes four sections of the bone chip collecting wall 123 .

[0039] In some embodiments, the cutting portion 110 includes a row of upper teeth and a row of lower teeth, the upper teeth and the lower teeth are staggered, and a chip groove 111 is provided between any two adjacent teeth of the upper teeth and the lower teeth, and the chip groove 111 is used to discharge bone chips cut by the saw.

[0040] See also Figure 1 In the above embodiment, a chip groove 111 is provided between two adjacent saw teeth to improve the chip removal ability of the cutting portion 110, thereby preventing bone fragments from accumulating in the cutting portion 110 and reducing heat generation. This can effectively prevent excessive heat generated during the cutting process from damaging human bone tissue, thereby ensuring effective bonding between the human joint prosthesis and the retained bone after implantation.

[0041] In some embodiments, one or two bone chip discharge channels 120 are provided on the upper surface of the saw blade body 100. In other embodiments, other numbers of bone chip discharge channels 120 may be provided on the upper surface of the saw blade body 100, without specific limitation, to improve the chip discharge capability of the oscillating saw blade and reduce heat generation.

[0042] In some embodiments, one or two bone chip discharge channels 120 are provided on the upper surface of the saw blade body 100 .

[0043] Additionally, a positioning portion 130 for connecting to a driving member is provided on the other end of the saw blade body 100 away from the cutting portion 110 .

[0044] See also Figure 2 , Figure 2This is a schematic diagram of an oscillating saw blade in operation according to one embodiment of the present invention. When sawing bone, the oscillating saw blade uses an osteotomy plate 20 to maintain the blade's vertical position. However, since the surgeon's body and the osteotomy plate 20 are not integral, the saw blade and the central square hole of the osteotomy plate 20 cannot be completely parallel during operation. Therefore, when sawing bone, the saw blade tilts vertically, generating friction between the plate 20 and the blade. The greater the tilt, the greater the friction and the greater the heat generated. The oscillating saw blade provided by the present invention is provided with a bone chip discharge channel on the surface of the saw blade, and the bone chip discharge channel 120 extends on the surface of the saw blade body 100. When the oscillating saw is working, some bone chips will be scattered on the contact surface between the saw blade body 100 and the osteotomy plate 20, and the bone chips will roll between the two relatively moving surfaces, thereby converting the sliding friction between the saw blade body 100 and the osteotomy plate 20 into rolling friction, ensuring smoother osteotomy and less heat generation, and effectively avoiding damage to human bone tissue caused by excessive heat generated during the cutting process, thereby ensuring effective combination between the human joint prosthesis and the retained bone after implantation.

[0045] An embodiment of the present invention further provides an oscillating saw, comprising the oscillating saw blade provided by any of the above embodiments of the present invention.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] In the description of the present invention, it should be understood that the terms "center," "height," "thickness," "up," "down," "vertical," "horizontal," "top," "bottom," "inside," "outside," "axial," "radial," "circumferential," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0049] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0050] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A swing saw blade, characterized in that: include: Saw blade body; a cutting portion for cutting bone tissue, the cutting portion being disposed at one end of the saw blade body; A bone chip discharge channel for discharging bone chips, wherein the entrance of the bone chip discharge channel is arranged on the surface of the saw blade body near the cutting portion, and the bone chip discharge channel extends on the surface of the saw blade body in a direction away from the cutting portion and forms an outlet, and bone chips can be discharged through the bone chip discharge channel.

2. The oscillating saw blade according to claim 1, wherein: The bone chip discharge channel includes a first channel side wall and a second channel side wall arranged opposite to each other, and the first channel side wall and the second channel side wall include multiple connected bone chip collecting walls, and the bone chip collecting wall has a concave surface. When the oscillating saw is in the swinging state, the broken bone chips alternately enter the bone chip collecting walls in the first channel side wall and the second channel side wall, and are finally discharged from the outlet of the bone chip discharge channel.

3. The oscillating saw blade according to claim 2, wherein: The concave surface includes an arc segment extending from the surface of the saw blade body to the edge of the saw blade body, and the bone chip collection wall also includes a blocking wall connected to the arc segment. The extension direction of the blocking wall is basically parallel to the extension direction of the cutting part. When the saw blade is in the swinging state, the broken bone chips are collected by the arc segment and accumulated on the blocking wall.

4. The oscillating saw blade according to claim 2, wherein: The first channel side wall and the second channel side wall are staggered at a certain distance, so that when the saw blade swings, the broken bone chips in the upper bone chip collecting wall can enter the opposite lower bone chip collecting wall.

5. The oscillating saw blade according to claim 4, wherein: The first channel side wall and the second channel side wall each include four sections of bone debris collecting walls.

6. The oscillating saw blade according to claim 1, wherein: The cutting portion includes a row of upper saw teeth and a row of lower saw teeth, the upper saw teeth and the lower saw teeth are arranged in an alternating manner, and a chip discharge groove is provided between any two adjacent saw teeth of the upper saw teeth and the lower saw teeth, and the chip discharge groove is used to discharge the bone chips cut by the saw.

7. The oscillating saw blade according to claim 1, wherein: One or two bone chip discharge channels are provided on the upper surface of the saw blade body.

8. The oscillating saw blade according to claim 1, wherein: The bone chip discharge channel is provided on the upper surface and the lower surface of the saw blade body.

9. The oscillating saw blade according to claim 1, wherein: A positioning portion for connecting to a driving member is provided on one end of the saw blade body away from the cutting portion.

10. An oscillating saw, characterized in that: The invention comprises an oscillating saw blade according to any one of claims 1 to 9.

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