Swing saw assembly and swing saw device

Abstract

The application discloses a swing saw assembly and a swing saw device. The swing saw assembly comprises a sheath plate and a swing saw blade. The sheath plate has a front end and a rear end, the front end and the rear end are formed through a receiving cavity, and the front end has an opening. The width of the rear end is greater than that of the front end. The swing saw blade comprises a main body and a tool bit. The main body is swingably arranged in the receiving cavity. One end of the main body is connected with the tool bit and passes through the opening, so that the tool bit is located outside the receiving cavity. Thus, compared with the swing saw assembly in the prior art, the front end of the sheath plate of the swing saw assembly has a smaller width, can be closer to the surgical incision, reduces the shielding and interference on the surrounding tissues, and is beneficial to fine operation in a narrow space.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a swing saw assembly and a swing saw device. Background Technology

[0002] In orthopedic surgery, a oscillating saw is typically used to cut bone tissue. An oscillating saw generally consists of an oscillating saw assembly and a drive assembly. The drive assembly drives the oscillating saw blade of the oscillating saw assembly to oscillate back and forth at high frequency, thereby cutting the bone tissue. The oscillating saw assembly generally includes a sheath plate and an oscillating saw blade; part of the oscillating saw blade is oscillatingly mounted inside the sheath plate, while the other part is located outside the sheath plate. However, in related technologies, the sheath plate is relatively large, resulting in a large overall size of the oscillating saw assembly, which is inconvenient for operators. Utility Model Content

[0003] This application provides a oscillating saw assembly and oscillating saw device to solve at least one of the above-mentioned technical problems.

[0004] In a first aspect, embodiments of this application provide a oscillating saw assembly, including:

[0005] A sheath plate having a front end and a rear end, the front end and the rear end communicating to form a receiving cavity, the front end having an opening, and the width of the rear end being greater than the width of the front end; and

[0006] The oscillating saw blade includes a main body and a blade head. The main body is oscillatingly disposed within the receiving cavity. One end of the main body extends through the opening and connects to the blade head, so that the blade head is located outside the receiving cavity.

[0007] In some embodiments, the width of the main body gradually decreases from the main body portion toward the blade head.

[0008] In some embodiments, the width of the front end is not less than 14 mm and not more than 23 mm, and the width of the rear end is not less than 26 mm and not more than 28 mm.

[0009] In some embodiments, the connection between the front end and the rear end of the sheath plate along its width direction is an arc-shaped transition.

[0010] In some embodiments, the sheath plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate cooperating to form the receiving cavity, the front end of the first cover plate cooperating with the front end of the second cover plate to form the front end, and the rear end of the first cover plate cooperating with the rear end of the second cover plate to form the rear end.

[0011] The first cover plate and the second cover plate are integrally formed or the first cover plate and the second cover plate are welded together and fixed.

[0012] In some embodiments, a support frame is also included, which is disposed between the first cover plate and the second cover plate. The support frame, the first cover plate, and the second cover plate cooperate to form a solder receiving groove, which is located outside the receiving cavity.

[0013] In some embodiments, the solder receiving groove is located at the front end, and there are multiple solder receiving grooves. The solder receiving grooves are provided on opposite sides of the front end along the width direction of the sheath plate.

[0014] In some embodiments, the support frame includes a welded section and a support section connected together, the welded section being recessed relative to the support section, the connection between the welded section and the support section being an arc-shaped transition connection, and the welded section, the first cover plate, and the second cover plate cooperating to form the solder receiving groove.

[0015] In some embodiments, the solder receiving groove extends along the length of the sheath plate, and the sheath plate is further provided with a plurality of welding holes located at the front end, each of the welding holes penetrating the first cover plate, the support frame and the second cover plate.

[0016] Secondly, this application provides a swing saw device, which includes a drive component and a swing saw component according to any of the above embodiments. The drive component is tractively connected to the swing saw blade to drive the swing saw blade to swing.

[0017] The oscillating saw assembly and device provided in this application include a sheath plate and an oscillating saw blade. The sheath plate has a front end and a rear end, which are connected to form a receiving cavity. The front end has an opening, and the width of the rear end is greater than the width of the front end. The oscillating saw blade includes a main body and a blade head. The main body is oscillatingly disposed within the receiving cavity, and one end of the main body extends through the opening and connects to the blade head, so that the blade head is located outside the receiving cavity. Thus, compared with the oscillating saw assemblies in related technologies, the front end of the sheath plate of the oscillating saw assembly of this application has a smaller width, which allows it to be closer to the surgical incision, reducing obstruction and interference to surrounding tissues, and facilitating precise operations in confined spaces. In addition, the larger width of the rear end helps to increase the contact area between the rear end and the drive assembly, thereby enhancing the structural strength and connection stability of the oscillating saw device and ensuring that it is not easily deformed or loosened during high-frequency oscillation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the oscillating saw assembly provided in an embodiment of this application.

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of section II.

[0021] Figure 3 for Figure 1 A schematic diagram of the exploded structure of the oscillating saw assembly.

[0022] Figure 4 for Figure 3 A schematic diagram of the supporting skeleton.

[0023] Explanation of icon numbers:

[0024] 10. Oscillating saw assembly; 100. Sheath plate; 101. Receiving cavity; 102. Opening; 103. Solder receiving groove; 104. Welding hole; 110. Front end; 120. Rear end; 130. First cover plate; 140. Second cover plate; 200. Oscillating saw blade; 210. Main body; 220. Blade head; 300. Support frame; 310. Welding section; 320. Support section.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In orthopedic surgery, a oscillating saw is typically used to cut bone tissue. An oscillating saw generally consists of an oscillating saw assembly and a drive assembly. The drive assembly drives the oscillating saw blade of the oscillating saw assembly to oscillate back and forth at high frequency, thereby cutting the bone tissue. The oscillating saw assembly generally includes a sheath plate and an oscillating saw blade; part of the oscillating saw blade is oscillatingly mounted inside the sheath plate, while the other part is located outside the sheath plate. However, in related technologies, the sheath plate is relatively large, resulting in a large overall size of the oscillating saw assembly, which is inconvenient for operators.

[0031] In view of this, please refer to Figures 1 to 3 This application provides an oscillating saw assembly 10, which includes a sheath plate 100 and an oscillating saw blade 200. The sheath plate 100 has a front end portion 110 and a rear end portion 120, which communicate to form a receiving cavity 101. The front end portion 110 has an opening 102, and the width of the rear end portion 120 is greater than the width of the front end portion 110. The oscillating saw blade 200 includes a main body portion 210 and a blade head 220. The main body portion 210 is oscillatingly disposed within the receiving cavity 101, and one end of the main body portion 210 extends through the opening 102 and connects to the blade head 220, so that the blade head 220 is located outside the receiving cavity 101. Thus, compared with oscillating saw assemblies in the related art, the front end portion 110 of the sheath plate 100 of the oscillating saw assembly 10 of this application has a smaller width, which allows it to be closer to the surgical incision, reducing obstruction and interference to surrounding tissues, and facilitating delicate operations in confined spaces.

[0032] In addition, the rear end 120 has a larger width, which helps to increase the contact area between the rear end 120 and the drive component, thereby enhancing the structural strength and connection stability of the oscillating saw device and ensuring that it is not easily deformed or loosened during high-frequency oscillation.

[0033] In some embodiments, the width of the main body 210 gradually decreases from the main body 210 toward the blade head 220. Specifically, the width of the main body 210 of the oscillating saw blade 200 gradually decreases from the end furthest from the blade head 220 toward the end connected to the blade head 220, forming a tapered transition structure. This not only reduces the overall weight of the oscillating saw blade 200 but also reduces resistance during movement, improves oscillation response speed and energy efficiency, and allows the main body 210 to fit the narrower sheath plate 100 at the front end 110, further reducing the envelope size of the front working area of ​​the oscillating saw assembly 10.

[0034] The oscillating saw blade 200 can be made of metal materials, such as stainless steel or titanium alloy, to ensure that it maintains sufficient rigidity and fatigue strength during high-frequency reciprocating oscillation.

[0035] The overall outline of the main body 210 can be roughly plate-shaped. By selecting a reasonable thickness and designing the planar dimensions, the main body 210 can reduce the overall weight of the oscillating saw blade 200 while ensuring sufficient strength, making it easier to operate and reducing the burden during the operation.

[0036] The blade head 220 has multiple serrations at the end opposite to the main body 210. These serrations can be arranged sequentially along the edge of the blade head 220, and the spacing and height of the serrations can be adjusted according to actual application requirements. A reasonable arrangement of serrations can effectively disperse cutting force, reduce tissue damage caused by excessive local pressure, and at the same time reduce the wear rate of the serrations, extending their service life.

[0037] In some embodiments, the width of the front end portion 110 is not less than 14 mm and not more than 23 mm. For example, the width of the front end portion 110 can be, but is not limited to, 14 mm, 16 mm, 18 mm, 20 mm, or 23 mm. Thus, the narrower size design of the front end portion 110 effectively reduces the space occupied by the oscillating saw assembly 10 in the surgical area, facilitating access to the target bone tissue in orthopedic surgery, such as for space-constrained minimally invasive surgical procedures. This helps reduce pressure and interference with surrounding soft tissues, improving the visibility of the surgical field and the degree of freedom of operation. The width of the front end portion 110 within the aforementioned range allows for miniaturization of the front-end structure while maintaining structural rigidity, contributing to improved surgical precision.

[0038] In some embodiments, the width of the rear end portion 120 is not less than 26 mm and not more than 28 mm. For example, the width of the rear end portion 120 can be, but is not limited to, 26 mm, 27 mm, or 28 mm. Thus, the rear end portion 120 has a relatively large width, and the width dimension of the rear end portion 120 is set in the range of 26 mm to 28 mm, providing sufficient mounting area and mechanical support for the connection between the sheath plate 100 and the drive assembly, thereby enhancing the vibration resistance and connection reliability of the overall structure.

[0039] In some embodiments, the sheath plate 100 has arc-shaped transitions on both sides along its width, at the junction of the front end 110 and the rear end 120. This makes the shape change between the front end 110 and the rear end 120 smoother, avoiding sharp edges or abrupt cross-sections, effectively reducing the risk of stress concentration, and improving the structural durability of the sheath plate 100 under high-frequency oscillation conditions. The arc-shaped contour also improves the smoothness of the outer surface of the oscillating saw assembly 10, reducing the possibility of snagging or scraping with surrounding tissues during surgery, which helps ensure surgical safety. The symmetrically arranged arc-shaped transition structures on both sides enhance the mechanical symmetry of the overall structure, making the load transfer more uniform and helping to maintain the trajectory stability of the oscillating saw blade 200 in reciprocating motion.

[0040] Please see Figure 2 and Figure 3 In some embodiments, the sheath plate 100 includes a first cover plate 130 and a second cover plate 140. The first cover plate 130 may be disposed opposite to the second cover plate 140. The first cover plate 130 and the second cover plate 140 cooperate to form a receiving cavity 101. For example, the first cover plate 130 and the second cover plate 140 are connected along a peripheral region and enclose to form a receiving cavity 101 with an opening 102. The front end of the first cover plate 130 cooperates with the front end of the second cover plate 140 to form a front end portion 110, and the rear end of the first cover plate 130 cooperates with the rear end of the second cover plate 140 to form a rear end portion 120.

[0041] In some embodiments, the first cover plate 130 and the second cover plate 140 are integrally formed. For example, the first cover plate 130 and the second cover plate 140 can be manufactured using processes such as stamping, precision casting, powder metallurgy sintering, or chemical etching, which helps to improve the overall mechanical strength and sealing performance of the sheath plate 100. The integrally formed structure also avoids assembly errors, ensures the accuracy of the internal dimensions and surface finish of the receiving cavity 101, and is beneficial to the smooth operation of the oscillating saw blade 200 during high-frequency oscillation.

[0042] In some embodiments, the first cover plate 130 and the second cover plate 140 are welded together. The first cover plate 130 and the second cover plate 140 are each independently manufactured and formed, and then connected by welding after assembly. The welding method can be laser welding or resistance welding. During welding, heat is applied to the edge mating surfaces of the first cover plate 130 and the second cover plate 140, causing them to locally melt and fuse. After cooling, a dense metallurgical bonding layer is formed, ensuring that the connection between the first cover plate 130 and the second cover plate 140 has sufficient tensile strength and shear resistance.

[0043] The oscillating saw assembly 10 also includes a support frame 300, which is disposed between the first cover plate 130 and the second cover plate 140. The support frame 300 not only serves as a positioning and reinforcing component of the welded structure, but also improves the overall rigidity and torsional resistance of the sheath plate 100. Furthermore, it can effectively suppress deformation when the rear end 120 bears the vibration load transmitted by the drive assembly.

[0044] The support frame 300, the first cover plate 130, and the second cover plate 140 cooperate to form a solder receiving groove 103, which is located outside the receiving cavity. During the manufacturing process of the sheath plate 100, the first cover plate 130, the second cover plate 140, and the support frame 300 are connected by laser welding or resistance welding. The molten solder flows into the solder receiving groove 103 and solidifies, forming a strong structural connection. This effectively prevents solder from overflowing into the receiving cavity 101 and affecting the freedom of movement of the oscillating saw blade 200 or causing jamming. The solder receiving groove 103 is positioned to avoid the movement path of the oscillating saw blade 200, ensuring that the welding process does not affect the precision and cleanliness of the internal moving parts.

[0045] The solder receiving tank 103 can be located at the front end 110, which facilitates precise positioning and reliable connection of the front end structure during manufacturing and assembly, ensuring the relative stability of the first cover plate 130, the second cover plate 140, and the support frame 300. After welding, the cured solder forms a continuous connecting layer in the solder receiving tank 103, significantly enhancing the overall structural rigidity and connection strength of the front end 110, and also improving the mechanical stability of the front end 110 under high-frequency reciprocating oscillation conditions, effectively suppressing fretting wear and structural loosening caused by vibration, while improving fatigue resistance and extending the service life of the oscillating saw assembly 10.

[0046] Multiple solder receiving grooves 103 are provided along the width direction of the sheath plate 100, on both opposite sides of the front end 110. During the welding process, molten solder fills the solder receiving grooves 103 on both sides, and after solidification, forms a continuous and stable welded joint, effectively enhancing the bonding strength between the first cover plate 130, the second cover plate 140, and the support frame 300. The layout of multiple solder receiving grooves 103 significantly improves the overall rigidity and torsional resistance of the sheath plate 100, enabling it to maintain structural stability when subjected to the dynamic load generated by the high-frequency reciprocating oscillation of the swing saw blade 200, reducing vibration deformation, and preventing cracking or loosening due to weak local connections.

[0047] The solder receiving groove 103 extends along the length of the sheath plate 100. During welding, molten solder uniformly fills the solder receiving groove 103 along the length, forming a continuous and dense weld, which significantly enhances the structural connection strength between the first cover plate 130, the second cover plate 140, and the support frame 300. Furthermore, it facilitates the uniform distribution of welding heat input, reduces local overheating or welding deformation, and improves assembly accuracy. Simultaneously, the solder receiving groove 103 extending along the length and the welding section 310 of the support frame 300 work together to make it easier for the solder to achieve full wetting and stable formation under capillary action and gravity, avoiding solder accumulation or voids.

[0048] The support frame 300 includes a welded section 310 and a support section 320 connected to each other. The welded section 310 serves as the connection area between the support frame 300 and the cover plate structure of the sheath plate 100, providing a welding interface to ensure a firm connection between the first cover plate 130, the second cover plate 140, and the support frame 300. The support section 320 undertakes the main structural support function, located outside the receiving cavity 101 or extending to the rear end 120, to enhance the overall rigidity and deformation resistance of the sheath plate 100.

[0049] The welding section 310 is recessed relative to the support section 320, forming a recessed area lower than the surface of the support section 320 in terms of spatial structure. This provides a dedicated space for the welding process, allowing molten solder to flow and fill within a controllable range. For example, the welding section 310, the first cover plate 130, and the second cover plate 140 cooperate to form a solder receiving groove 103.

[0050] The connection between the welding section 310 and the support section 320 is an arc-shaped transition. This not only reduces stress concentration but also improves the fluidity of the solder in the molten state, promoting thorough wetting and dense filling of the solder within the weld tank. This arc-shaped transition structure avoids solder flow obstruction caused by sharp or right-angle connections, effectively preventing the formation of dead corners or pores within the solder receiving tank 103. The reduction in porosity and pores significantly improves the density and mechanical strength of the weld joint, reducing the risk of weld cracking due to defect propagation under high-frequency vibration environments.

[0051] The sheath plate 100 also has multiple welding holes 104 located at the front end 110, each welding hole 104 penetrating through the first cover plate 130, the support frame 300, and the second cover plate 140. The presence of the welding holes 104 provides a precise process channel for laser welding, resistance spot welding, or micro-beam plasma welding, allowing the solder or welding energy to directly act on the contact interface between the first cover plate 130, the support frame 300, and the second cover plate 140, forming a local fusion or penetration connection. The multiple welding holes 104 improve the welding density and structural reliability of the connection area, enhancing the overall rigidity and vibration resistance of the front end 110 under high-frequency reciprocating oscillation conditions. At the same time, the hole wall of the welding hole 104 forms a metallurgical bond with the solder, further improving the interlayer connection strength and preventing structural loosening or delamination caused by vibration or impact.

[0052] This application embodiment also provides a swing saw device, which includes a drive component and a swing saw assembly 10 as described in any of the above embodiments. The drive component is disposed at one end of the sheath plate 100 or integrated with the sheath plate 100. The output end of the drive component is connected to the main body 210 of the swing saw blade 200 through a transmission mechanism, transmitting the driving force to the swing saw blade 200. The transmission mechanism can adopt an eccentric connecting rod, a flexible transmission shaft, an electromagnetic drive module, or a gear rocker structure to convert the rotational motion or reciprocating linear motion generated by the drive component into high-frequency reciprocating oscillation of the swing saw blade 200 around a fulcrum. The drive component provides a stable and controllable power output, adjusting the oscillation frequency and amplitude to adapt to the cutting requirements of bone tissues with different hardness. The sheath plate 100 constrains and guides the movement path of the swing saw blade 200, preventing the blade head 220 from lateral displacement or vibration during oscillation, thereby improving cutting accuracy and operational safety.

[0053] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0054] The above are merely preferred embodiments of this application and are 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 oscillating saw assembly, characterized in that, include: A sheath plate having a front end and a rear end, the front end and the rear end being connected to form a receiving cavity, and the front end having an opening, the width of the rear end being greater than the width of the front end; as well as The oscillating saw blade includes a main body and a blade head. The main body is oscillatingly disposed within the receiving cavity. One end of the main body extends through the opening and connects to the blade head, so that the blade head is located outside the receiving cavity.

2. The oscillating saw assembly according to claim 1, characterized in that, The width of the main body gradually decreases from the direction of the cutter head.

3. The oscillating saw assembly according to claim 1, characterized in that, The width of the front end is not less than 14 mm and not more than 23 mm, and the width of the rear end is not less than 26 mm and not more than 28 mm.

4. The oscillating saw assembly according to claim 1, characterized in that, Both sides of the sheath plate along its width direction, at the connection between the front end and the rear end, are connected in an arc-shaped transition.

5. The oscillating saw assembly according to claim 1, characterized in that, The sheath plate includes a first cover plate and a second cover plate, which cooperate to form the receiving cavity. The front end of the first cover plate cooperates with the front end of the second cover plate to form the front end, and the rear end of the first cover plate cooperates with the rear end of the second cover plate to form the rear end. The first cover plate and the second cover plate are integrally formed or the first cover plate and the second cover plate are welded together and fixed.

6. The oscillating saw assembly according to claim 5, characterized in that, It also includes a support frame, which is disposed between the first cover plate and the second cover plate. The support frame, the first cover plate and the second cover plate cooperate to form a solder receiving groove, which is located outside the receiving cavity.

7. The oscillating saw assembly according to claim 6, characterized in that, The solder receiving groove is located at the front end, and there are multiple solder receiving grooves. The solder receiving grooves are provided on both opposite sides of the front end along the width direction of the sheath plate.

8. The oscillating saw assembly according to claim 6, characterized in that, The support frame includes a welded section and a support section connected to each other. The welded section is recessed relative to the support section. The connection between the welded section and the support section is an arc-shaped transition. The welded section, the first cover plate, and the second cover plate cooperate to form the solder receiving groove.

9. The oscillating saw assembly according to claim 6, characterized in that, The solder receiving groove extends along the length of the sheath plate, and the sheath plate is also provided with a plurality of welding holes located at the front end, each of the welding holes penetrating the first cover plate, the support frame and the second cover plate.

10. A swing saw device, characterized in that, include: The oscillating saw assembly according to any one of claims 1 to 9; as well as A drive assembly is connected to the oscillating saw blade to drive the oscillating saw blade to oscillate.

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