Sheathed oscillating saw blade and oscillating saw device

Abstract

The utility model discloses a sheathed swing saw blade and a swing saw device, wherein the sheathed swing saw blade comprises: a saw blade assembly, comprising a main body and a sawing portion connected to one end of the main body; a sheath plate, comprising an upper plate and a lower plate stacked, the saw blade assembly being arranged between the upper plate and the lower plate; and a frame assembly, fixedly connected to the upper plate and the lower plate, the frame assembly and the upper plate and the lower plate jointly surround and form a receiving cavity, the main body is swingably arranged in the receiving cavity, and the sawing portion extends from one end of the receiving cavity. The technical solution of the utility model solves the problem that the sheath is easily damaged.

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. The 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 disposed in the sheath. The tail end of the saw blade assembly is connected to the driving handle. The front end of the saw blade assembly has saw teeth. The driving handle drives the saw blade assembly to reciprocate at high frequencies, so that the saw teeth move back and forth to achieve cutting of bone tissue.

[0003] In the existing sheathed oscillating saw blade, the sheath is generally composed of two cover plates, one of which is bent at both sides and welded to the other cover plate, so that a cavity is formed between the two cover plates, and the saw blade assembly moves in the cavity.

[0004] However, the cover plate is relatively thin, and the saw blade assembly swings widely between the two cover plates, which can easily cause the bent portion to crack and cause damage to the sheath. Utility Model Content

[0005] The main purpose of the utility model is to provide a sheathed swing saw blade, aiming to solve the problem that the sheath is easily damaged.

[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] A sheath plate, comprising an upper plate and the lower plate which are stacked, the saw blade assembly being arranged between the upper plate and the lower plate; and

[0009] The skeleton component is fixedly connected to the upper plate and the lower plate. The skeleton component and the upper plate and the lower plate together surround a receiving cavity. The main body is swingably disposed in the receiving cavity, and the sawing portion extends from one end of the receiving cavity.

[0010] Optionally, the skeleton component extends from the rear end to the front end along the length direction of the sheath plate.

[0011] Optionally, the skeleton assembly includes a pair of sheath skeletons arranged opposite to each other, each of the sheath skeletons is fixedly connected to the upper plate and the lower plate; or each of the sheath skeletons is fixedly arranged between the upper plate and the lower plate.

[0012] Optionally, the sheath skeleton extends along the length direction of the sheath plate.

[0013] Optionally, a pair of the sheath frames and the sheath plates are assembled to form a sheath, the sheath is provided with a positioning hole, the positioning hole passes through the sheath plate and any of the sheath frames, and the sheath is connected to the driving handle through the positioning hole.

[0014] Optionally, the sheath is provided with a plurality of the positioning holes, and each of the sheath frames is penetrated by at least one of the positioning holes.

[0015] Optionally, the sheath frame is provided with an arc-shaped groove, and the arc-shaped groove is provided on a side of the sheath frame facing the main body.

[0016] 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 connection with a driving handle, and the sheath plate is provided with an avoidance hole corresponding to the mounting hole, and the diameter of the avoidance hole is larger than the diameter of the mounting hole.

[0017] Optionally, the main body portion and the sawing portion are integrally formed.

[0018] The utility model also provides a swing saw device, comprising:

[0019] The above-mentioned sheathed oscillating saw blade; and

[0020] A driving handle drives and connects the saw blade assembly.

[0021] A sheathed swing saw blade in a technical solution of an embodiment of the utility model includes a saw blade assembly, a sheath plate and a frame assembly, the sheath plate includes an upper plate and a lower plate that are stacked, the frame assembly, the upper plate and the lower plate surround and form a receiving cavity, the main body of the saw blade assembly is swingably arranged in the receiving cavity, so that the frame assembly, the upper plate and the lower plate form a sheath of the sheathed swing saw blade. The upper plate and the lower plate are connected by the frame assembly, and the strength of the frame assembly can be designed separately. When the saw blade assembly swings between the two sheath plates with a large amplitude, even if the saw blade assembly hits the frame assembly, it is not easy to cause damage to the frame assembly, thereby reducing the possibility of damage to the sheath and extending the service life of the sheath. On the other hand, in the prior art, the cover plate is bent to form the structural form of the sheath. In order to ensure the rigidity of the sheath after molding, the bending height of the cover plate is relatively low, and the distance between the two cover plates is narrow. The saw blade assembly can easily rub against the cover plate, resulting in obstruction of swinging. However, in the present solution, it is easy to change the distance between the upper plate and the lower plate by adjusting the structure of the skeleton assembly, so that there is sufficient space in the receiving cavity for the saw blade assembly to swing. This can not only reduce the situation where the saw blade assembly is obstructed in swinging and extend the service life of the saw blade assembly, but also make the saw blade assembly swing smoothly, thereby improving the cutting effect on bone tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of a sheathed swing saw blade of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 It is a partial structural schematic diagram of the sheath of the sheathed swing saw blade of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the sheath frame of the sheath of the sheathed swing saw blade of the utility model;

[0027] Figure 5 It is a structural schematic diagram of a sheath plate of a sheath of a sheathed swing saw blade of the utility model;

[0028] Figure 6 It is a structural schematic diagram of the saw blade assembly of the sheathed swing saw blade of the utility model.

[0029] Description of Figure Numbers:

[0030] Label name Label name 100 Sheath 101 Positioning hole 110 Sheath plate 111 Avoidance hole 120 Skeleton Components 121 Sheath frame 1211 Arc groove 200 Saw blade assembly 210 Main body 211 Mounting holes 220 Sawing Department

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The utility model provides a sheathed swing saw blade.

[0037] Reference Figures 1 to 3 and Figure 6 , Figure 1 This is a schematic structural diagram of an embodiment of a sheathed swing saw blade of the utility model. Figure 2 for Figure 1 A partial enlarged view of the middle A. Figure 3 This is a partial structural diagram of the sheath of the sheathed swing saw blade of the utility model. Figure 6 It is a structural schematic diagram of the saw blade assembly of the sheathed swing saw blade of the utility model.

[0038] In an embodiment of the utility model, the sheathed oscillating saw blade comprises:

[0039] The saw blade assembly 200 includes a main body 210 and a sawing portion 220 connected to one end of the main body 210;

[0040] The sheath plate 110 includes an upper plate and a lower plate which are stacked, and the saw blade assembly 200 is disposed between the upper plate and the lower plate; and

[0041] The skeleton assembly 120 is fixedly connected to the upper plate and the lower plate. The skeleton assembly 120 and the upper plate and the lower plate together surround a receiving cavity. The main body 210 is swingably disposed in the receiving cavity, and the sawing portion 220 extends from one end of the receiving cavity.

[0042] A sheathed swing saw blade in a technical solution of an embodiment of the utility model includes a saw blade assembly 200, a sheath plate 110 and a skeleton assembly 120. The sheath plate 110 includes an upper plate and a lower plate arranged in layers. The skeleton assembly 120, the upper plate and the lower plate surround and form a receiving cavity. The main body 210 of the saw blade assembly 200 is swingably arranged in the receiving cavity, so that the skeleton assembly 120, the upper plate and the lower plate form a sheath 100 of the sheathed swing saw blade. The two sheath plates 110 are connected by the skeleton assembly 120, and the strength of the skeleton assembly 120 can be designed separately. When the saw blade assembly 200 swings between the two sheath plates 110 with a large amplitude, even if the saw blade assembly 200 hits the skeleton assembly 120, it is not easy to cause damage to the skeleton assembly 120, thereby reducing the possibility of damage to the sheath 100 and extending the service life of the sheath 100. On the other hand, in the prior art, the cover plate is bent to form the structural form of the sheath 100. In order to ensure the rigidity of the sheath 100 after molding, the bending height of the cover plate is relatively low, and the spacing between the two cover plates is narrow. The saw blade assembly 200 can easily rub against the cover plate, resulting in obstruction of swinging. However, in the present solution, by adjusting the structure of the skeleton assembly 120, it is easy to change the spacing between the upper plate and the lower plate, 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, thereby improving the cutting effect on bone tissue.

[0043] Optionally, the skeleton component 120 extends from the rear end to the front end along the length direction of the sheath plate. It should be noted that the front end in the present invention refers to the end close to the sawing part, and the rear end refers to the end away from the sawing part. The skeleton component 120 extends from the rear end to the front end of the sheath plate, which is beneficial to strengthen the strength of the sheath.

[0044] Optionally, the skeleton assembly 120 includes a pair of sheath skeletons 121 disposed opposite to each other, and each sheath skeleton 121 is fixedly connected to the upper plate and the lower plate.

[0045] Please refer to Figure 3In this embodiment, the skeleton assembly 120 includes two sheath skeletons 121, which are arranged opposite to each other along the width direction of the sheath plate 110. Each sheath skeleton 121 is connected to the two sheath plates 110. The sheath skeleton 121 can be arranged between the upper plate and the lower plate, or can be arranged on both sides of the upper plate and the lower plate so that there is a certain gap between the upper plate and the lower plate. The sheath skeleton 121 and the sheath plate 110 can be fixed by welding or bonding. The space surrounded by the two sheath skeletons 121 and the two sheath plates 110 is the receiving cavity, which makes the entire sheath 100 simple in structure, easy to implement, and low in manufacturing difficulty.

[0046] Optionally, the sheath skeleton 121 extends along the length direction of the sheath plate 110 .

[0047] In this embodiment, the sheath skeleton 121 is in the shape of an elongated strip, extending along the length direction of the sheath plate 110, extending from one end of the sheath plate 110 close to the main body 210 of the saw blade assembly 200 to the other end of the sheath plate 110 close to the sawing part 220. The connection range between the sheath skeleton 121 and the sheath plate 110 is large, thereby improving the strength of the sheath 100 and extending the service life of the sheath 100.

[0048] Optionally, each sheath frame 121 is fixed between the upper plate and the lower plate.

[0049] In this embodiment, the sheath frame 121 is arranged between the upper plate and the lower plate, and the assembly process of the sheathed swing saw blade is: first, two sheath frames 121 and a sheath plate 110 are welded, and then the saw blade assembly 200 is placed between the two sheath frames 121, and finally another sheath plate 110 is buckled on the two sheath frames 121 and welded and fixed. The sheath frame 121 is arranged between the sheath plates 110, and the structure is simpler, which is more convenient in manufacturing, and it is also convenient to design the thickness of the sheath frame 121 according to the thickness of the saw blade assembly 200. Specifically, in this embodiment, the sheath frame 121 is plate-shaped.

[0050] Optionally, a pair of sheath frames 121 and sheath plates 110 are assembled to form a sheath 100 . The sheath 100 is provided with a positioning hole 101 . The positioning hole 101 passes through the sheath plate 110 and any sheath frame 121 . The sheath 100 is connected to the driving handle through the positioning hole 101 .

[0051] Please refer to Figure 1 In this embodiment, a positioning hole 101 is provided on the sheath 100, and 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 improving the safety when sawing bone tissue.

[0052] Optionally, the sheath 100 is provided with a plurality of positioning holes 101 , and each sheath frame 121 is penetrated by at least one positioning hole 101 .

[0053] Please combine Figure 1 and Figure 3 In this embodiment, the sheath 100 is provided with a plurality of positioning holes 101, which are arranged at intervals, and the sheath 100 can be fixed more securely through the plurality of positioning holes 101. Specifically in this embodiment, the sheath 100 is provided with two positioning holes 101, which are symmetrically arranged, and one positioning hole 101 passes through one sheath frame 121, so that the sheath 100 is evenly stressed when fixed and is not easily driven to move.

[0054] Optionally, the sheath frame 121 is provided with an arc-shaped groove 1211 , and the arc-shaped groove 1211 is provided on a side of the sheath frame 121 facing the main body 210 .

[0055] Please combine Figure 3 and Figure 4 In this embodiment, each sheath frame 121 is provided with an arc groove 1211. The arc grooves 1211 of the two arc frames are opposite to each other to form a circular cavity, which corresponds to the outer peripheral shape of the driving end of the main body 210 of the saw blade assembly 200 and is slightly larger than the outer peripheral size of the driving end. It can not only form a limiting effect on the saw blade assembly 200 to prevent the saw blade assembly 200 from shaking randomly in the accommodating cavity, but also ensure that the saw blade assembly 200 swings well.

[0056] 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 for driving and connecting with a driving handle, and the sheath plate 110 is provided with an avoidance hole 111 corresponding to the mounting hole 211, and the diameter of the avoidance hole 111 is larger than the diameter of the mounting hole 211.

[0057] Please combine Figure 1 , Figure 5 and Figure 6In this embodiment, a driving end is provided at one end of the main body 210 away from the sawing part 220, and a mounting hole 211 is provided at the driving end. 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 circumference of 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. The sheath plate 110 is provided with an avoidance hole 111 corresponding to the mounting hole 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.

[0058] Optionally, the main body portion 210 and the sawing portion 220 are integrally formed.

[0059] In this embodiment, the main body 210 and the sawing part 220 are integrally formed, and the connection between the main body 210 and the sawing part 220 is tighter. When the sawing part 220 saws bone tissue, it is less likely that the saw blade assembly 200 will break.

[0060] The utility model also provides a swing saw device, comprising:

[0061] The above-mentioned sheathed oscillating saw blade; and

[0062] The driving handle drives the saw blade assembly 200 .

[0063] 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.

[0064] 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 sheath plate, comprising an upper plate and a lower plate which are stacked, wherein the saw blade assembly is arranged between the upper plate and the lower plate; as well as A skeleton component, wherein the skeleton component extends from the rear end to the front end along the length direction of the sheath plate and is fixedly connected to the upper plate and the lower plate. The skeleton component and the upper plate and the lower plate together surround a receiving cavity, the main body can be swingably disposed in the receiving cavity, and the sawing portion extends from one end of the receiving cavity.

2. The sheathed oscillating saw blade according to claim 1, characterized in that: The frame assembly includes a pair of sheath frames arranged opposite to each other, each of the sheath frames is fixedly connected to the upper plate and the lower plate; or each of the sheath frames is fixedly arranged between the upper plate and the lower plate.

3. The sheathed oscillating saw blade according to claim 2, characterized in that: The sheath frame extends along the length direction of the sheath plate.

4. The sheathed oscillating saw blade according to claim 3, characterized in that: A pair of the sheath frames and the sheath plates are assembled to form a sheath. The sheath is provided with a positioning hole, which passes through the sheath plate and any of the sheath frames. The sheath is connected to the driving handle through the positioning hole.

5. The sheathed oscillating saw blade according to claim 4, characterized in that: The sheath is provided with a plurality of positioning holes, and each of the sheath frames is penetrated by at least one positioning hole.

6. The sheathed oscillating saw blade according to claim 2, characterized in that: The sheath frame is provided with an arc groove, and the arc groove is arranged on a side of the sheath frame facing the main body.

7. The sheathed oscillating saw blade according to claim 1, 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 connection with a driving handle, and an avoidance hole is provided on the sheath plate corresponding to the mounting hole, and a diameter of the avoidance hole is larger than a diameter of the mounting hole.

8. The sheathed oscillating saw blade according to claim 1, characterized in that: The main body and the sawing portion are integrally formed.

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

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