Sheathed reciprocating saw blades and medical reciprocating saws

Abstract

This utility model discloses a sheathed reciprocating saw blade and a medical reciprocating saw, relating to the field of medical device technology. The sheathed reciprocating saw blade includes: a saw blade assembly comprising a saw blade body and saw teeth located on one side of the saw blade body; and a sheath assembly having a receiving cavity and a notch communicating with the receiving cavity. The saw blade body is disposed within the receiving cavity and can move linearly back and forth along its length, with the saw teeth extending from the notch. The outer wall of the sheath assembly has a chip-receiving groove. The technical solution provided by this utility model reduces bone damage to the bone wound surface during the saw blade's cutting of bone tissue.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a sheathed reciprocating saw blade and a medical reciprocating saw. Background Technology

[0002] A reciprocating saw is a commonly used orthopedic surgical cutting tool. It generally includes a drive handle and a saw blade. The saw blade has teeth on one side. The drive handle drives the saw blade to make linear reciprocating motion, thereby sawing bone tissue.

[0003] However, during the sawing process of cutting bone tissue, bone fragments will continuously fill the space between the saw blade and the bone wound on both sides of the saw blade, increasing the friction between the saw blade and the bone tissue, which makes the bone wound prone to thermal damage. Utility Model Content

[0004] The main purpose of this invention is to propose a sheathed reciprocating saw blade and a medical reciprocating saw, which aims to reduce bone damage to the bone wound surface during the saw blade's cutting of bone tissue.

[0005] To achieve the above objectives, the present invention provides a sheathed reciprocating saw blade comprising:

[0006] A saw blade assembly includes a saw blade body and saw teeth disposed on one side of the saw blade body;

[0007] The sheath assembly has a receiving cavity and a notch communicating with the receiving cavity. The saw blade body is disposed in the receiving cavity and can move back and forth linearly along its own length direction. The saw teeth extend out from the notch.

[0008] The outer wall of the sheath assembly is provided with a chip-collecting groove.

[0009] In one embodiment, a plurality of chip-collecting grooves are provided at intervals along the length direction of the sheath assembly; and / or,

[0010] Multiple chip-collecting grooves are spaced apart along the width direction of the sheath assembly.

[0011] In one embodiment, the sheath assembly has a front section and a rear section connected to each other, the notch extending from one end of the front section away from the rear section to one end of the front section connecting to the rear section, and the chip-receiving groove is provided in the front section; and / or,

[0012] The chip groove is connected to the receiving cavity.

[0013] In one embodiment, the sheath assembly includes two stacked sheath plates, which together form the receiving cavity, and at least one of the sheath plates is provided with the chip-receiving groove.

[0014] In one embodiment, the saw blade body is provided with a clearance hole extending along its own length direction, and the sheath assembly further includes a connecting structure, which passes through the clearance hole and connects the two sheath plates.

[0015] In one embodiment, each of the sheath plates has a protrusion that protrudes toward the other sheath plate, and the protrusions of the two sheath plates are connected one-to-one to form the connection structure.

[0016] In one embodiment, the sheath assembly further includes:

[0017] The first frame is fixedly connected to the two sheath plates and extends from the rear end to the front end along the length direction of the sheath plates;

[0018] The second frame is disposed opposite to the first frame and fixedly connected to the two sheath plates. The first frame, the second frame, and the two sheath plates together surround and form the receiving cavity.

[0019] The two sheath plates have corresponding notches at their front ends, and the second frame extends from the rear end of the sheath plate along the length of the sheath plate to the edge of the notch, so that the notch forms the gap.

[0020] In one embodiment, the first frame is disposed between the two sheath plates; and / or,

[0021] The second frame is located between the two sheath plates.

[0022] In one embodiment, the rear end of the sheath assembly is provided with a first snap-fit ​​structure for detachably connecting to the drive handle; and / or,

[0023] The saw blade body has a second snap-fit ​​structure at its rear end, which is used to detachably connect to the reciprocating shaft of the drive handle.

[0024] This utility model also proposes a medical reciprocating saw, comprising:

[0025] The aforementioned reciprocating saw blade with sheath; and

[0026] Drive the handle to drive the saw blade assembly.

[0027] The sheathed reciprocating saw blade of this utility model includes a saw blade assembly and a sheath assembly. The saw blade body of the saw blade assembly is located in the receiving cavity of the sheath assembly, and the saw teeth extend to the outside from the notch. The linear reciprocating movement of the saw blade body within the receiving cavity drives the linear reciprocating movement of the external saw teeth, thereby achieving the sawing function. During the sawing of bone tissue, the stationary sheath assembly separates the internal saw blade body from the bone tissue, ensuring that only the saw teeth of the saw blade assembly contact the bone tissue, while the saw blade body does not contact the bone wound surfaces on both sides. This reduces friction between the saw blade and the bone tissue, thereby reducing thermal damage to the bone wound surface during sawing, reducing the temperature rise of the saw blade assembly, and extending the service life of the saw blade assembly. The outer wall of the sheath assembly is provided with a chip-collecting groove, which can collect bone chips, reducing the accumulation of bone chips between the saw blade and the bone tissue, thereby reducing sawing resistance and improving sawing efficiency. In addition, after sawing stops and the saw blade leaves the bone tissue, the bone chips in the chip-collecting groove can be removed together with the saw blade, making it easy to clean the sawed area and shortening the operation time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the sheathed reciprocating saw blade provided by this utility model;

[0030] Figure 2 This is a cross-sectional view of an embodiment of the sheathed reciprocating saw blade provided by this utility model;

[0031] Figure 3 An exploded view of an embodiment of the sheathed reciprocating saw blade provided by this utility model.

[0032] Explanation of icon numbers:

[0033] 100. Saw blade assembly; 110. Saw blade body; 111. Clearance hole; 112. Second snap-fit ​​structure; 120. Saw teeth;

[0034] 200, Sheath assembly; 201, Front section; 202, Rear section; 203, First snap-fit ​​structure; 210, Sheath plate; 211, Chip groove; 212, Notch; 220, First skeleton; 230, Second skeleton; 240, Connecting structure; 241, Protrusion.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, or a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] This utility model proposes a reciprocating saw blade with a sheath.

[0041] Please see Figure 1 , Figure 1This is a schematic diagram of an embodiment of the sheathed reciprocating saw blade provided by this utility model.

[0042] In one embodiment of this utility model, the sheathed reciprocating saw blade includes:

[0043] The saw blade assembly 100 includes a saw blade body 110 and a saw tooth portion 120 disposed on one side of the saw blade body 110;

[0044] The sheath assembly 200 has a receiving cavity and a notch communicating with the receiving cavity. The saw blade body 110 is located in the receiving cavity and moves back and forth in a straight line along its own length direction. The saw teeth 120 protrude from the notch.

[0045] The outer wall of the sheath assembly 200 is provided with a chip groove 211.

[0046] The sheathed reciprocating saw blade of this utility model includes a saw blade assembly 100 and a sheath assembly 200. The saw blade body 110 of the saw blade assembly 100 is disposed in the receiving cavity of the sheath assembly 200, and the saw teeth 120 extend to the outside from the notch. The linear reciprocating movement of the saw blade body 110 within the receiving cavity drives the linear reciprocating movement of the external saw teeth 120, thereby realizing the sawing function. During the sawing of bone tissue, the fixed sheath assembly 200 separates the internal saw blade body 110 from the bone tissue, so that only the saw teeth 120 of the saw blade assembly 100 contact the bone tissue, while the saw blade body 110 does not contact the bone wound surfaces on both sides. This reduces the friction between the saw blade and the bone tissue, thereby reducing thermal damage to the bone wound surface during sawing, reducing the temperature rise of the saw blade assembly 100, and extending the service life of the saw blade assembly 100. The outer wall of the sheath assembly 200 is provided with a chip-collecting groove 211, which can collect bone chips, reducing the accumulation of bone chips between the saw blade and the bone tissue, thereby reducing sawing resistance and improving sawing efficiency. In addition, after sawing stops and the saw blade leaves the bone tissue, the bone chips in the chip-collecting groove 211 can be removed together with the saw blade, making it easy to clean the sawed area and shorten the operation time.

[0047] In one embodiment, a plurality of chip-receiving grooves 211 are provided at intervals along the length of the sheath assembly 200; and / or,

[0048] Multiple chip grooves 211 are provided at intervals along the width direction of the sheath assembly 200.

[0049] Reference Figure 1 In the embodiments of this utility model, along the length direction of the saw blade body 110, that is, along the length direction of the sheath assembly 200, a plurality of chip-collecting grooves 211 are provided on the outer wall of the sheath assembly 200, which increases the space for collecting bone chips, so that the sheath assembly 200 can collect more bone chips, further reducing sawing resistance and facilitating cleaning of the sawing area.

[0050] In the embodiments of this utility model, along the width direction of the saw blade body 110, that is, along the width direction of the sheath assembly 200, a plurality of chip-collecting grooves 211 are provided on the outer wall of the sheath assembly 200, which increases the space for collecting bone chips, enabling the sheath assembly 200 to collect more bone chips, further reducing sawing resistance and facilitating cleaning of the sawing area.

[0051] In one embodiment, the sheath assembly 200 has a front section 201 and a rear section 202 connected to each other, a notch extending from one end of the front section 201 away from the rear section 202 to one end of the front section 201 connected to the rear section 202, a chip groove 211 is provided in the front section 201; and / or, the chip groove 211 communicates with the receiving cavity.

[0052] Reference Figure 1 In an embodiment of this utility model, the sheath assembly 200 has a front section 201 and a rear section 202. Figure 1 The middle dotted line separates the front section 201 and the rear section 202. The notch extends along the length of the sheath assembly 200 from the front end of the front section 201 to the rear end. During the sawing process of the sawing part sawing bone tissue, most of the bone chips generated are located in the front section 201 of the sheath assembly 200. The chip collection groove 211 is set in the front section 201 of the sheath assembly 200. This can not only ensure the receiving effect of the chip collection groove 211 and collect as many bone chips as possible, but also reduce the impact of the groove on the strength of the sheath assembly 200 and ensure the service life of the sheath assembly 200.

[0053] In an embodiment of this utility model, the chip groove 211 connects the receiving cavity and the external environment. During the sawing process of the saw cutting part cutting bone tissue, some bone chips may enter the interior of the receiving cavity through the notch. By connecting the chip groove 211 with the receiving cavity, the bone chips in the receiving cavity can leave through the chip groove 211. That is, the chip groove 211 can also realize the chip removal function, avoid the accumulation of a lot of bone chips in the receiving cavity, reduce the influence of bone chips in the receiving cavity on the linear reciprocating motion of the saw blade assembly 100, and thus improve the smoothness of the linear reciprocating motion of the saw blade assembly 100.

[0054] In one embodiment, the sheath assembly 200 includes two stacked sheath plates 210, which together form a receiving cavity, and at least one of the sheath plates 210 is provided with a chip groove 211.

[0055] In an embodiment of this utility model, the sheath assembly 200 includes two stacked sheath plates 210, and a chip-receiving groove 211 may be provided on only one of the sheath plates 210, as shown in the figure. Figure 3 This ensures the strength of the sheath assembly 200; alternatively, chip grooves 211 can be provided on both sheath plates 210, allowing the sheath assembly 200 to hold more bone chips, further reducing sawing resistance and facilitating cleaning of the sawing area.

[0056] In one embodiment, the saw blade body 110 is provided with a clearance hole 111 extending along its own length direction, and the sheath assembly 200 further includes a connecting structure 240, which passes through the clearance hole 111 and connects two sheath plates 210.

[0057] Combination Figures 1 to 3 In this embodiment of the invention, the two sheath plates 210 are connected by a connecting structure 240, which improves the rigidity and strength of the sheath assembly 200 and reduces the possibility of deformation or damage to the sheath assembly 200. Since the saw blade body 110 moves linearly back and forth within the receiving cavity, a clearance hole 111 is provided on the saw blade body 110 to avoid the connecting structure 240. The connecting structure 240 passes through the clearance hole 111 to prevent interference between the saw blade body 110 and the connecting structure 240 during linear back and forth movement. The connecting structure 240 can be implemented using screws, rivets, or other methods. Specifically, in this embodiment, multiple connecting structures 240 are provided along the length of the saw blade body 110, and a clearance hole 111 is provided on the saw blade body 110 corresponding to each connecting structure 240.

[0058] In one embodiment, each sheath plate 210 is provided with a protrusion 241 protruding toward the other sheath plate 210, and the protrusions 241 of the two sheath plates 210 are connected one-to-one to form a connection structure 240.

[0059] Combination Figures 1 to 3 In this embodiment of the invention, each sheath plate 210 is stamped with a protrusion 241. When two sheath plates 210 are joined together, the protrusions 241 on each sheath plate 210 protrude towards the interior of the receiving cavity, so that the protrusions 241 on the two sheath plates 210 abut against each other in a one-to-one manner. The two abutting protrusions 241 are then welded together to form a connecting structure 240. In this embodiment, the connecting structure 240 does not require additional parts, reducing the number of components that make up the sheath assembly 200 and improving the convenience of assembling the sheath assembly 200.

[0060] Specifically, in this embodiment, the center lines of the multiple protrusions 241 on the sheath plate 210 are staggered from the center lines of the multiple chip grooves 211, which ensures the rigidity and strength of the sheath assembly 200, reduces the possibility of deformation or damage to the sheath assembly 200, and extends the service life of the sheathed reciprocating saw blade.

[0061] In one embodiment, the sheath assembly 200 further includes:

[0062] The first frame 220 is fixedly connected to the two sheath plates 210 and extends from the rear end to the front end along the length direction of the sheath plates 210;

[0063] The second frame 230 is disposed opposite to the first frame 220 and fixedly connected to the two sheath plates 210. The first frame 220, the second frame 230 and the two sheath plates 210 together surround and form a receiving cavity.

[0064] Among them, the front ends of the two sheath plates 210 are provided with corresponding notches 212, and the second frame 230 extends from the rear end to the edge of the notch 212 along the length direction of the sheath plate 210, so that a notch is formed at the notch 212.

[0065] Combination Figures 1 to 3 In this embodiment of the invention, the sheath assembly 200 further includes a first frame 220 and a second frame 230. The first frame 220 and the second frame 230 are arranged opposite each other along the width direction of the sheath plate 210. Both the first frame 220 and the second frame 230 are fixedly connected to the two sheath plates 210, so that the first frame 220, the second frame 230, and the two sheath plates 210 together surround and form a receiving cavity. The first frame 220 can be disposed between the two sheath plates 210 or on the outside of the two sheath plates 210; similarly, the second frame 230 can also be disposed between the two sheath plates 210 or on the outside of the two sheath plates 210. Furthermore, a notch 212 is provided at the front end of the two sheath plates 210, and the second frame 230 extends from the rear end of the sheath plate 210 to the edge of the notch 212, thereby forming a notch at the notch 212 for the serrated portion 120 to extend out. In this embodiment, the structures of the components of the sheath assembly 200 are relatively simple and the processing difficulty is low.

[0066] In one embodiment, the first frame 220 is disposed between the two sheath plates 210; and / or,

[0067] The second frame 230 is located between the two sheath plates 210.

[0068] In an embodiment of this utility model, the first frame 220 is disposed between two sheath plates 210, and the second frame 230 is also disposed between two sheath plates 210. The first frame 220 and the second frame 230 have the same thickness and are separated by two sheath plates 210. During assembly, the first frame 220 and the second frame 230 can be placed on one sheath plate 210 and welded and fixed first, and then the other sheath plate 210 can be covered and welded and fixed, which facilitates assembly and improves the manufacturing efficiency of sheathed reciprocating saw blades.

[0069] In one embodiment, the rear end of the sheath assembly 200 is provided with a first snap-fit ​​structure 203, the first snap-fit ​​structure 203 being used for detachable connection with the drive handle; and / or,

[0070] The rear end of the saw blade body 110 is provided with a second snap-fit ​​structure 112, which is used to detachably connect with the reciprocating shaft of the drive handle.

[0071] Reference Figure 1 In this embodiment of the invention, the rear end of the sheath assembly 200 is provided with a first snap-fit ​​structure 203, allowing the sheath assembly 200 to be detachably connected to the drive handle. The first snap-fit ​​structure 203 can be implemented using a snap-fit, bayonet, quick connector, or other similar method. The rear end of the saw blade body 110 is provided with a second snap-fit ​​structure 112, allowing the saw blade body 110 to be detachably connected to the reciprocating shaft of the drive handle. The second snap-fit ​​structure 112 can be implemented using a snap-fit, quick connector, or other similar method. The detachable connection between the saw blade body 110 and the drive handle facilitates the replacement of different saw blades in the medical reciprocating saw. The detachable connection between the sheath assembly 200, the saw blade body 110, and the drive handle achieves a detachable connection between the entire sheathed reciprocating saw blade and the drive handle, facilitating the replacement of different specifications and sizes of sheathed reciprocating saw blades according to different surgical needs.

[0072] In embodiments of this utility model, the saw blade body 110 and the saw tooth portion 120 can be integrally formed, or they can be separately formed and then connected into one piece by snap-fitting, welding, or other methods. Specifically, in this embodiment, the saw tooth portion 120 and the saw blade body 110 are separately formed. A mounting groove is provided on the side of the saw tooth portion 120 that is away from its own saw teeth. After the saw tooth portion 120 is snapped into the edge of the saw blade body 110 through the mounting groove, the saw tooth portion 120 and the saw blade body 110 are then welded and fixed.

[0073] This utility model also proposes a medical reciprocating saw, comprising:

[0074] The aforementioned reciprocating saw blade with sheath; and

[0075] Drive handle, drive connected saw blade assembly 100.

[0076] The specific structure of the sheathed reciprocating saw blade is as described in the above embodiments. Since this medical reciprocating saw adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0077] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A reciprocating saw blade with a sheath, characterized in that, include: A saw blade assembly includes a saw blade body and saw teeth disposed on one side of the saw blade body; The sheath assembly has a receiving cavity and a notch communicating with the receiving cavity. The saw blade body is disposed in the receiving cavity and can move back and forth linearly along its own length direction. The saw teeth extend out from the notch. The outer wall of the sheath assembly is provided with a chip-collecting groove.

2. The sheathed reciprocating saw blade as described in claim 1, characterized in that, The chip-collecting grooves are provided at intervals along the length direction of the sheath assembly; and / or Multiple chip-collecting grooves are spaced apart along the width direction of the sheath assembly.

3. The sheathed reciprocating saw blade as described in claim 1, characterized in that, The sheath assembly has a front section and a rear section connected to each other, the notch extends from one end of the front section away from the rear section to one end of the front section connected to the rear section, and the chip-receiving groove is provided in the front section; and / or The chip groove is connected to the receiving cavity.

4. The sheathed reciprocating saw blade as described in claim 1, characterized in that, The sheath assembly includes two stacked sheath plates, which together form the receiving cavity, and at least one of the sheath plates is provided with the chip-receiving groove.

5. The sheathed reciprocating saw blade as described in claim 4, characterized in that, The saw blade body is provided with a clearance hole extending along its own length direction, and the sheath assembly also includes a connecting structure, which passes through the clearance hole and connects the two sheath plates.

6. The sheathed reciprocating saw blade as described in claim 5, characterized in that, Each of the sheath plates has a protrusion that protrudes toward the other sheath plate, and the protrusions of the two sheath plates are connected one-to-one to form the connection structure.

7. The sheathed reciprocating saw blade as described in claim 4, characterized in that, The sheath assembly also includes: The first frame is fixedly connected to the two sheath plates and extends from the rear end to the front end along the length direction of the sheath plates; The second frame is disposed opposite to the first frame and fixedly connected to the two sheath plates. The first frame, the second frame, and the two sheath plates together surround and form the receiving cavity. The two sheath plates have corresponding notches at their front ends, and the second frame extends from the rear end of the sheath plate along the length of the sheath plate to the edge of the notch, so that the notch forms the gap.

8. The sheathed reciprocating saw blade as described in claim 7, characterized in that, The first frame is disposed between the two sheath plates; and / or, The second frame is located between the two sheath plates.

9. The sheathed reciprocating saw blade as described in claim 1, characterized in that, The rear end of the sheath assembly is provided with a first snap-fit ​​structure, which is used for detachable connection with the drive handle; and / or, The saw blade body has a second snap-fit ​​structure at its rear end, which is used to detachably connect to the reciprocating shaft of the drive handle.

10. A medical reciprocating saw, characterized in that, include: Sheathed reciprocating saw blade as described in any one of claims 1 to 9; as well as Drive the handle to drive the saw blade assembly.

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