Swing saw blade with sheath and swing saw device

Abstract

The utility model discloses a pendulum saw blade with a sheath and a pendulum saw device, and the pendulum saw blade with the sheath comprises a saw blade assembly which comprises a main body part and a saw cutting part connected with one end of the main body part; the protective sheath is provided with an upper plate and a lower plate, a containing cavity is defined by the upper plate and the lower plate, the main body part is arranged in the containing cavity in a swinging mode, the sawing part extends out of one end of the containing cavity, the upper plate and / or the lower plate are / is provided with a chip removal groove, the chip removal groove communicates with the containing cavity and the external environment, and the chip removal groove is formed in the end, close to the sawing part, of the protective sheath and is close to the side wall of the protective sheath. According to the technical scheme, the possibility that swing of the saw blade assembly is blocked in the cutting process is reduced.

Description

Technical Field

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

[0002] In orthopedic surgery, an oscillating saw device is often used to saw bone tissue.

[0003] An oscillating saw device generally includes an oscillating saw blade with a sheath and a driving handle. The oscillating saw blade with a sheath includes a sheath and a saw blade assembly arranged in the sheath. The sheath has a receiving cavity. The tail end of the saw blade assembly is connected to the driving handle inside the receiving cavity. The front end of the saw blade assembly has saw teeth. The driving handle drives the saw blade assembly to perform high-frequency reciprocating swings, thereby causing the saw teeth to move back and forth to achieve cutting of bone tissue.

[0004] However, in the process of cutting bone tissue, bone chips produced by cutting often jump into the receiving cavity, which can easily cause the saw blade assembly to be obstructed from swinging or even stuck. Utility Model Content

[0005] The main purpose of the utility model is to provide a sheathed swing saw blade, aiming to reduce the possibility of the saw blade assembly being blocked from swinging during the cutting process.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a sheathed swing saw blade, comprising:

[0007] The saw blade assembly comprises a main body and a sawing portion connected to one end of the main body;

[0008] The sheath comprises an upper plate and a lower plate, wherein the upper plate and the lower plate together form a receiving cavity, wherein the main body is swingably disposed in the receiving cavity, and the sawing portion extends out from one end of the receiving cavity, wherein the upper plate and / or the lower plate are provided with a chip groove, wherein the chip groove connects the receiving cavity and the external environment, and wherein the chip groove is disposed at one end of the sheath close to the sawing portion and close to the side wall of the sheath.

[0009] Optionally, the chip removal groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove are arranged at intervals along the width direction of the sheath.

[0010] Optionally, the distance between the first sub-groove and the second sub-groove decreases from an end close to the sawing portion to an end far from the sawing portion.

[0011] Optionally, the chip removal groove further includes a third sub-groove connected to the first sub-groove, the third sub-groove extending along the length direction of the sheath and arranged on a side of the first sub-groove away from the sawing portion; and / or,

[0012] The chip removal groove further includes a fourth sub-groove communicated with the second sub-groove, wherein the fourth sub-groove extends along the length direction of the sheath and is disposed on a side of the second sub-groove away from the sawing portion.

[0013] Optionally, both the first sub-groove and the second sub-groove extend along the length direction of the sheath.

[0014] Optionally, the width of the main body increases from an end close to the sawing portion to an end away from the sawing portion, and the main body at most blocks one of the first sub-groove and the second sub-groove inside the accommodating cavity.

[0015] Optionally, the upper plate and the lower plate are stacked, the saw blade assembly is arranged between the upper plate and the lower plate, and the sheath further comprises:

[0016] A sheath frame is fixedly connected to the upper plate and the lower plate. Two sheath frames are provided, each of which is fixedly connected to the upper plate and the lower plate. The two sheath frames and the upper plate and the lower plate together surround the receiving cavity.

[0017] Optionally, the sheath is provided with a positioning hole, the positioning hole passes through the upper plate, the lower plate and any one of the sheath frames, and the positioning hole is used to connect with a driving handle to fix the sheath.

[0018] Optionally, a driving end is provided at one end of the main body away from the sawing portion, and a mounting hole is provided at the driving end. The mounting hole is used for driving and connecting with a driving handle, and avoidance holes are provided on the upper plate and the lower plate corresponding to the mounting hole, and the diameter of the avoidance hole is larger than the diameter of the mounting hole.

[0019] The utility model also provides a swing saw device, comprising:

[0020] The above-mentioned sheathed oscillating saw blade; and

[0021] A driving handle drives and connects the saw blade assembly.

[0022] A sheathed swinging saw blade in a technical solution of an embodiment of the utility model includes a saw blade assembly and a sheath, the sheath is provided with a receiving cavity, the main body of the saw blade assembly can swing inside the receiving cavity, and the sawing part of the saw blade assembly is arranged outside the receiving cavity. When the main body swings back and forth, it drives the sawing part to swing back and forth, thereby realizing sawing of bone tissue. The sawing part will produce bone chips when sawing bone tissue, and the bone chips can easily enter the interior of the receiving cavity during the vibration. The sheath in this scheme has an upper plate and a lower plate, and the upper plate and the lower plate are combined to form a receiving cavity. A chip groove can be set on the upper plate or the lower plate, or on both the upper plate and the lower plate. The chip groove is set at one end of the sheath close to the sawing part, and the chip groove is close to the side walls on both sides of the sheath. When the bone chips enter the interior of the receiving cavity, under the influence of factors such as gravity and air flow, part of the bone chips can leave through the opening of the receiving cavity itself, and part of the bone chips can leave the receiving cavity through the chip groove, so that the bone chips entering the receiving cavity have a greater possibility of being discharged from the receiving cavity, reducing the possibility and amount of accumulation of bone chips in the receiving cavity, thereby avoiding the problem of obstruction of the swing of the saw blade assembly caused by the accumulation of bone chips, making the swing of the saw blade assembly smoother, and the temperature rise of the saw blade assembly during the swing process is smaller, which prolongs the service life of the saw blade assembly. On the other hand, the chip groove is easy to process, with fewer processing steps, reducing the difficulty of making the sheath, and improving the production efficiency of the sheathed swing saw blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of a sheathed swing saw blade of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the lower plate of the sheath of the sheathed swing saw blade of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the upper plate of the sheath of the sheathed swing saw blade of the utility model;

[0027] Figure 4 It is a partial structural schematic diagram of an embodiment of a sheathed swing saw blade of the utility model;

[0028] Figure 5 It is a structural schematic diagram of a saw blade assembly of a sheathed swing saw blade of the utility model;

[0029] Figure 6The utility model is a schematic diagram of the structure of the sheath frame of the sheath of the sheathed swing saw blade.

[0030] Description of Figure Numbers:

[0031] Label name Label name 100 Sheath 101 Positioning hole 110 Lower plate 111 Avoidance hole 112 Chip flute 1121 First subslot 1122 Second subslot 1123 The third subslot 1124 Fourth subslot 120 Sheath frame 200 Saw blade assembly 210 Main body 211 Mounting holes 220 Sawing Department 130 Upper board

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model provides a sheathed swing saw blade.

[0038] Reference Figure 1 and Figure 5 , Figure 1 This is a schematic structural diagram of an embodiment of a sheathed swing saw blade of the utility model. Figure 5 It is a structural schematic diagram of the saw blade assembly of the sheathed swing saw blade of the utility model.

[0039] In an embodiment of the utility model, the sheathed oscillating saw blade comprises:

[0040] The saw blade assembly 200 includes a main body 210 and a sawing portion 220 connected to one end of the main body 210;

[0041] The sheath 100 comprises an upper plate 130 and a lower plate 110, which together form a receiving chamber, wherein a main body 210 can be swung in the receiving chamber, and a sawing portion 220 extends from one end of the receiving chamber, wherein the upper plate 130 and / or the lower plate 110 are provided with a chip groove 112, which connects the receiving chamber with the external environment, and the chip groove 112 is provided at one end of the sheath 100 close to the sawing portion 220 and close to the side wall of the sheath 100.

[0042] A sheathed swing saw blade in a technical solution of an embodiment of the utility model includes a saw blade assembly 200 and a sheath 100. The sheath 100 is provided with a receiving cavity. The main body 210 of the saw blade assembly 200 can swing inside the receiving cavity. The sawing part 220 of the saw blade assembly 200 is arranged outside the receiving cavity. When the main body 210 swings back and forth, it drives the sawing part 220 to swing back and forth, thereby realizing sawing of bone tissue. The sawing portion 220 will generate bone chips when sawing bone tissue, and the bone chips can easily enter the interior of the receiving cavity during the vibration. The sheath 100 in this solution has an upper plate 130 and a lower plate 110, and the upper plate 130 and the lower plate 110 together form a receiving cavity. The upper plate 130 and the lower plate 110 can be provided with a chip groove 112, or the upper plate 130 and the lower plate 110 can be provided with a chip groove 112. The chip groove 112 is arranged at one end of the sheath 100 close to the sawing portion 220, and the chip groove 112 is close to the side walls on both sides of the sheath 100. When the bone chips enter the interior of the receiving cavity, Affected by factors such as gravity and air flow, part of the bone chips can leave the receiving chamber through the opening of the receiving chamber itself, and part of the bone chips can leave the receiving chamber through the chip groove 112, so that the bone chips entering the receiving chamber have a greater possibility of being discharged from the receiving chamber, reducing the possibility and amount of accumulation of bone chips in the receiving chamber, thereby avoiding the problem of obstruction of the swing of the saw blade assembly 200 caused by the accumulation of bone chips, making the swing of the saw blade assembly 200 smoother, the temperature rise of the saw blade assembly 200 during the swing process is smaller, and the service life of the saw blade assembly 200 is extended. On the other hand, the chip groove 112 is easy to process, with fewer processing steps, reducing the difficulty of manufacturing the sheath 100, and improving the production efficiency of the sheathed swing saw blade.

[0043] Optionally, the chip groove 112 includes a first sub-groove 1121 and a second sub-groove 1122 , and the first sub-groove 1121 and the second sub-groove 1122 are arranged at intervals along the width direction of the sheath 100 .

[0044] Reference Figure 2 In this embodiment, the chip removal groove 112 includes a first sub-groove 1121 and a second sub-groove 1122. The first sub-groove 1121 and the second sub-groove 1122 are spaced apart along the width direction of the sheath 100. By utilizing the two sub-grooves for chip removal, the bone chips are more efficiently discharged from the interior of the receiving cavity, thereby further reducing the possibility of bone chips accumulating inside the receiving cavity.

[0045] Optionally, the distance between the first sub-groove 1121 and the second sub-groove 1122 decreases from an end close to the sawing portion 220 to an end far from the sawing portion 220 .

[0046] Reference Figure 2In the present embodiment, since the saw blade assembly 200 swings inside the accommodating cavity, when the chip groove 112 is arranged closer to the sheath frame 120, the chip groove 112 is less likely to be blocked by the saw blade assembly 200, but at the same time, the strength of the sheath 100 itself is also damaged. Therefore, the first sub-groove 1121 and the second sub-groove 1122 in the present embodiment are arranged in a figure eight shape. At a position close to the sawing portion 220, the spacing between the first sub-groove 1121 and the second sub-groove 1122 is the largest. Along the direction away from the sawing portion 220, the spacing between the first sub-groove 1121 and the second sub-groove 1122 gradually decreases, which can not only prevent the chip groove 112 from being blocked by the saw blade assembly 200 as much as possible, but also ensure the strength of the sheath 100.

[0047] Optionally, the chip groove 112 further includes a third sub-groove 1123 connected to the first sub-groove 1121, the third sub-groove 1123 extends along the length direction of the sheath 100, and is arranged on a side of the first sub-groove 1121 away from the sawing portion 220; and / or,

[0048] The chip groove 112 further includes a fourth sub-groove 1124 communicating with the second sub-groove 1122 . The fourth sub-groove 1124 extends along the length direction of the sheath 100 and is disposed on a side of the second sub-groove 1122 away from the sawing portion 220 .

[0049] Reference Figure 2 In this embodiment, the chip groove 112 also includes a third sub-groove 1123. At a position far away from the sawing part 220, the swinging range of the saw blade assembly 200 is small, and the chip groove 112 is not easily blocked by the saw blade assembly 200. Therefore, a third sub-groove 1123 extending along the length direction of the sheath 100 is provided. The third sub-groove 1123 is connected to the first sub-groove 1121. On the one hand, the size of the chip groove 112 is enlarged, which is beneficial to the discharge of bone chips. On the other hand, the processing difficulty is low and the strength damage to the sheath 100 is also small.

[0050] Reference Figure 2 In this embodiment, the chip groove 112 also includes a fourth sub-groove 1124. At a position far away from the sawing portion 220, the saw blade assembly 200 has a smaller swinging range, and the chip groove 112 is not easily blocked by the saw blade assembly 200. Therefore, a fourth sub-groove 1124 extending along the length direction of the sheath 100 is provided. The fourth sub-groove 1124 is connected to the second sub-groove 1122. On the one hand, the size of the chip groove 112 is enlarged, which is beneficial to the discharge of bone chips. On the other hand, the processing difficulty is low, and the strength damage to the sheath 100 is also small.

[0051] Optionally, both the first sub-groove 1121 and the second sub-groove 1122 extend along the length direction of the sheath 100 .

[0052] In this embodiment, the first sub-groove 1121 and the second sub-groove 1122 both extend along the length direction of the sheath 100, have a simple structure, and are easy to manufacture, thereby improving the processing efficiency of the upper plate 130 and the lower plate 110, thereby improving the production efficiency of the sheathed oscillating saw blade.

[0053] Optionally, the width of the main body 210 increases from one end close to the sawing portion 220 to one end away from the sawing portion 220 , and the main body 210 at most blocks one of the first sub-groove 1121 and the second sub-groove 1122 inside the receiving cavity.

[0054] Combination Figure 4 and Figure 5 In this embodiment, the saw blade assembly 200 includes a main body 210 and a sawing part 220. The main body 210 has a first end and a second end. The first end of the main body 210 is connected to the driving handle, and the second end of the main body 210 is connected to the sawing part 220. When the first end of the main body 210 is driven to rotate by the driving handle, the second end of the main body 210 will swing, thereby driving the sawing part 220 to swing. Specifically in this embodiment, since the first end of the main body 210 is closer to the swing center than the second end of the main body 210, the movement path of the first end of the main body 210 is shorter than the movement path of the second end of the main body 210. Therefore, the width of the first end of the main body 210 is greater than the width of the second end of the main body 210, which can reduce the obstruction of the sheath skeleton 120 to the second end of the main body 210, so that the main body 210 can obtain a larger swing angle. When the main body 210 is in the middle of the accommodating cavity, the main body 210 neither blocks the first sub-groove 1121 nor the second sub-groove 1122. When the main body 210 swings to block the first sub-groove 1121, the second sub-groove 1122 is completely unblocked. When the main body 210 swings to block the second sub-groove 1122, the first sub-groove 1121 is completely unblocked. This ensures that no matter how the main body 210 moves, there is always a chip groove 112 for discharging bone chips, thereby avoiding poor chip removal of the chip groove 112 due to obstruction of the sawing component, further improving the chip removal effect, and reducing the possibility of the sawing component being obstructed from swinging.

[0055] Optionally, the upper plate 130 and the lower plate 110 are stacked, the saw blade assembly 200 is disposed between the upper plate 130 and the lower plate 110, and the sheath 100 further includes:

[0056] The sheath frame 120 is fixedly connected to the upper plate 130 and the lower plate 110. There are two sheath frames 120, each of which is fixedly connected to the upper plate 130 and the lower plate 110. The two sheath frames 120, the upper plate 130 and the lower plate 110 together surround a receiving cavity.

[0057] Combination Figure 1 , Figure 4 and Figure 6In this embodiment, the sheath 100 includes an upper plate 130, a lower plate 110 and two sheath frames 120. The sheath frame 120 connects the upper plate 130 and the lower plate 110, and can be arranged between the upper plate 130 and the lower plate 110, or can be arranged on both sides of the upper plate 130 and the lower plate 110 so that the upper plate 130 and the lower plate 110 have a certain gap. The sheath frame 120 and the upper plate 130, the sheath frame 120 and the lower plate 110 can be fixed by welding or bonding, etc. The space surrounded by the upper plate 130, the lower plate 110 and the two sheath frames 120 is the receiving cavity, so that the entire sheath 100 has a simple structure, is easy to implement, and has low manufacturing difficulty. Specifically in this embodiment, the assembly process of the sheathed swing saw blade is: first, the two sheath frames 120 and the lower plate 110 are welded, then the saw blade assembly 200 is placed between the two sheath frames 120, and finally the upper plate 130 is buckled on the two sheath frames 120 and welded and fixed. The sheath frame 120 is arranged between the upper plate 130 and the lower plate 110, and the structure is simpler, and it is more convenient to manufacture. It is also convenient to design the thickness of the sheath frame 120 according to the thickness of the saw blade assembly 200. Specifically, in this embodiment, the sheath frame 120 is plate-shaped. The upper plate 130 and the lower plate 110 are connected by the sheath frame 120, and the strength of the sheath frame 120 can be designed separately. When the saw blade assembly 200 swings between the upper plate 130 and the lower plate 110 with a large amplitude, even if the saw blade assembly 200 hits the sheath frame 120, it is not easy to cause damage to the sheath frame 120, thereby reducing the possibility of damage to the sheath 100 and extending the service life of the sheath 100. On the other hand, by adjusting the structure of the sheath frame 120, it is easy to change the distance between the upper plate 130 and the lower plate 110, so that the accommodating cavity has sufficient space for the saw blade assembly 200 to swing. This can not only reduce the situation where the saw blade assembly 200 is obstructed from swinging and extend the service life of the saw blade assembly 200, but also enable the saw blade assembly 200 to swing smoothly and improve the cutting effect on bone tissue.

[0058] Optionally, the sheath 100 is provided with a positioning hole 101 , which passes through the upper plate 130 , the lower plate 110 and any sheath frame 120 , and the positioning hole 101 is used to connect with a driving handle to fix the sheath 100 .

[0059] Please refer to the figure. In this embodiment, a positioning hole 101 is provided on the sheath 100. The driving handle can be connected by screwing or clamping, so that the sheath 100 and the driving handle are fixed to prevent the sheath 100 from moving, thereby improving the safety of the operator when using the sawing device and the safety when sawing bone tissue. Specifically in this embodiment, the sheath 100 is provided with two positioning holes 101, and the two positioning holes 101 are symmetrically arranged. One positioning hole 101 passes through a sheath frame 120, so that the sheath 100 is evenly stressed when fixed and is not easily driven to move.

[0060] Optionally, a driving end is provided at one end of the main body 210 away from the sawing portion 220, and a mounting hole 211 is provided at the driving end. The mounting hole 211 is used to connect with the driving handle. The upper plate 130 and the lower plate 110 are provided with avoidance holes 111 corresponding to the mounting holes 211, and the diameter of the avoidance holes 111 is larger than the diameter of the mounting holes 211.

[0061] Combination Figures 1 to 4 In this embodiment, the first end of the main body 210 is the driving end, and the driving end is provided with a mounting hole 211. The driving handle drives the saw blade assembly 200 through the mounting hole 211, so that the saw blade assembly 200 can swing around the swing center. Specifically, in this embodiment, the driving end of the saw blade assembly 200 is provided with seven mounting holes 211, and the seven mounting holes 211 are distributed in an array around the swing center to ensure that the driving handle drives the saw blade assembly 200 to swing stably, so that the driving end of the saw blade assembly 200 is more evenly stressed, and the service life of the saw blade assembly 200 is extended. Avoidance holes 111 are provided on the upper plate 130 and the lower plate 110 corresponding to the mounting holes 211. When the saw blade assembly 200 is driven to swing by the driving handle, the driving member of the driving handle will be inserted into the mounting hole 211 and drive the mounting hole 211 to swing around the swing center. Therefore, the diameter of the avoidance hole 111 needs to be larger than the diameter of the mounting hole 211, so that the avoidance hole 111 provides sufficient activity space for the driving member of the driving handle. If the avoidance hole 111 is the same size as the mounting hole 211, the avoidance hole 111 will jam the driving component of the driving handle and fail to drive the saw blade assembly 200 to swing, or the driving component may damage the connection structure between the driving handle and the positioning hole 101 of the sheath 100, causing the sheath 100 to swing together.

[0062] The utility model also provides a swing saw device, comprising:

[0063] The above-mentioned sheathed oscillating saw blade; and

[0064] The driving handle drives the saw blade assembly 200 .

[0065] The oscillating saw device includes a sheathed oscillating saw blade and a driving handle. The specific structure of the sheathed oscillating saw blade refers to the above-mentioned embodiment. Since the oscillating saw device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, by adopting the above-mentioned sheathed oscillating saw blade, when the driving handle drives the saw blade assembly 200 to saw bone tissue, it is not easy for the sheath 100 to be damaged or the saw blade assembly 200 to overheat, which can improve the safety of the operator using the oscillating saw device and also improve the safety of orthopedic surgery.

[0066] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sheathed oscillating saw blade, characterized in that: include: The saw blade assembly comprises a main body and a sawing portion connected to one end of the main body; A protective sheath, comprising an upper plate and a lower plate, wherein the upper plate and the lower plate together form a receiving cavity, wherein the main body is swingably disposed in the receiving cavity, wherein the sawing portion extends out from one end of the receiving cavity, wherein the upper plate and / or the lower plate is provided with a chip removal groove, wherein the chip removal groove communicates with the receiving cavity and an external environment, and wherein the chip removal groove is disposed at one end of the protective sheath close to the sawing portion and close to a side wall of the protective sheath; The chip groove includes a first sub-groove and a second sub-groove, the first sub-groove and the second sub-groove are spaced apart along the width direction of the sheath, and the spacing between the first sub-groove and the second sub-groove decreases from one end close to the sawing part to one end away from the sawing part.

2. The sheathed oscillating saw blade according to claim 1, characterized in that: The chip removal groove further includes a third sub-groove connected to the first sub-groove, the third sub-groove extending along the length direction of the sheath and arranged on a side of the first sub-groove away from the sawing portion; and / or, The chip removal groove further includes a fourth sub-groove communicated with the second sub-groove, wherein the fourth sub-groove extends along the length direction of the sheath and is disposed on a side of the second sub-groove away from the sawing portion.

3. The sheathed oscillating saw blade according to claim 1, characterized in that: The first sub-groove and the second sub-groove both extend along the length direction of the sheath.

4. The sheathed oscillating saw blade according to any one of claims 1 to 3, characterized in that: The width of the main body increases from an end close to the sawing portion to an end far from the sawing portion, and the main body at most blocks one of the first sub-groove and the second sub-groove inside the receiving cavity.

5. The sheathed oscillating saw blade according to claim 1, characterized in that: The upper plate and the lower plate are stacked, the saw blade assembly is arranged between the upper plate and the lower plate, and the sheath further comprises: A sheath frame is fixedly connected to the upper plate and the lower plate. Two sheath frames are provided, each of which is fixedly connected to the upper plate and the lower plate. The two sheath frames and the upper plate and the lower plate together surround the receiving cavity.

6. The sheathed oscillating saw blade according to claim 5, characterized in that: The sheath is provided with a positioning hole, the positioning hole passes through the upper plate, the lower plate and any one of the sheath frames, and the positioning hole is used to connect with a driving handle to fix the sheath.

7. The sheathed oscillating saw blade according to claim 6, characterized in that: A driving end is provided at one end of the main body away from the sawing portion, and a mounting hole is provided at the driving end. The mounting hole is used for driving and connecting with a driving handle, and avoidance holes are provided on the upper plate and the lower plate corresponding to the mounting hole, and the diameter of the avoidance hole is larger than the diameter of the mounting hole.

8. A swing saw device, characterized in that: include: The sheathed oscillating saw blade according to any one of claims 1 to 7; as well as A driving handle drives and connects the saw blade assembly.

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