Detachable saw blade for surgical swing saw

Abstract

The detachable saw blade for the surgical swing saw comprises a saw blade assembly used for being installed on a swing saw body, the saw blade assembly comprises an upper cover, a base, a driving rod, a fixing frame and a saw blade head, the upper cover and the base are combined and installed together, an installation cavity is formed between the upper cover and the base, and the fixing frame is fixed in the installation cavity. A movable limiting groove is formed in the position, corresponding to the driving rod and the saw blade head, of the fixing frame, an elliptic eccentric through hole is formed in one end of the driving rod, the driving rod is located in the movable limiting groove, and the other end of the driving rod is rotationally connected to one end of the saw blade head through a pin shaft; an eccentric shaft is eccentrically fixed on the mounting disc and penetrates through the eccentric through hole; due to the design of the saw blade assembly, the problem that the cutting path is inaccurate due to the fact that the saw blade head additionally impacts the cutting operation guiding device is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of saw blades, and more specifically, to a detachable saw blade for a surgical oscillating saw. Background Art

[0002] An oscillating saw is a surgical tool equipped with a power source and used in plastic surgery, and is also called a sagittal saw in some documents; it mainly consists of a handheld part, and the handheld part contains a motor and a drive control circuit for controlling the operation of the motor inside; the head of this tool extends forward and distally from the handheld part and is internally equipped with a vibrating shaft. The saw blade can be detachably mounted on the vibrating shaft, and the distal front edge of the saw blade has exposed saw teeth, which are used for cutting the tissue being acted on. A drive mechanism is provided inside the housing, and this mechanism generates power, which causes the vibrating shaft and the attached saw blade to move back and forth in such a way that the saw blade is fixed on the vibrating shaft. When the saw is actuated by the drive mechanism in this way, the saw teeth will closely adhere to the tissue they are cutting and move in a right / left / right / left pattern. Since the surgeon holds the saw and applies forward pressure, the saw teeth cut and separate the hard tissue that the saw blade is acting on during the movement.

[0003] Although many standard oscillating saws and their adapted saw blades can effectively cut bones, these components also have some limitations. Many commercially available oscillating saws are equipped with flat saw blades, which not only produce left - right oscillations but also generate up - down vibrations. Inevitably, they will friction the material surface of multiple grooves of the resection guide device, which may cause the width of these grooves to be too large and no longer be able to precisely define the expected cutting line. Once this situation occurs in the resection guide device, it needs to be replaced; at the same time, if the cutting saw blade closely adheres to and repeatedly contacts the resection guide device, it will cause the resection guide device to move, which is disadvantageous for precise cutting; in addition, due to the weight of the saw blade itself, a certain swing inertia will be generated during the swinging process, and some vibrations will be generated when the saw blade separates from the surface after friction with the surface of the resection guide device. In this way, relatively high vibrations will be generated due to high - frequency impacts during the operation of the oscillating saw, and these vibrations will be transmitted to the hand of the surgeon holding the saw through the saw blade. Therefore, the surgeon needs to use some force to resist these vibrations to ensure that the handheld part can be firmly held. This may cause great physical and mental fatigue to the surgeon. The utility model proposes a new solution to the above problems. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a detachable saw blade for a surgical oscillating saw to solve the technical problems mentioned in the background art.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A detachable saw blade for a surgical oscillating saw, comprising a saw blade assembly for mounting onto an oscillating saw body. The saw blade assembly includes an upper cover, a base, a drive rod, a fixing bracket, and a saw head. The upper cover and the base are assembled together, and an installation cavity is formed between the upper cover and the base. The fixing bracket is fixed in the installation cavity, and the fixing bracket is provided with movable limiting grooves corresponding to the positions of the drive rod and the saw head. One end of the drive rod is provided with an elliptical eccentric through hole, the drive rod is located in the movable limiting groove, and the other end of the drive rod is rotatably connected to one end of the saw head through a pin shaft. An installation disk is axially fixed to the working end of the oscillating saw body, and an eccentric shaft is eccentrically fixed to the installation disk. The eccentric shaft passes through the eccentric through hole.

[0007] Preferably, the movable limiting groove is tadpole-shaped, and the head of the movable limiting groove is used for installing one end of the drive rod. The tail of the movable limiting groove is open, and the tail of the movable limiting groove is used for installing the saw head.

[0008] In any of the above solutions, preferably, the drive rod includes a connecting rod, an elliptical drive piece, and a Y-shaped rod. The elliptical eccentric through hole is arranged on the elliptical drive piece. There are two groups of connecting rods, and the two groups of connecting rods are symmetrically arranged on the elliptical drive piece along the center line of the installation cavity. One end of the connecting rod is rotatably connected to the elliptical drive piece, and the other end of the connecting rod is rotatably connected to the Y-shaped rod. One end of the Y-shaped rod is rotatably connected to the saw head.

[0009] In any of the above solutions, preferably, auxiliary grooves are respectively arranged on the inner sides of the upper cover and the base corresponding to the rotation axis position of the Y-shaped rod.

[0010] In any of the above solutions, preferably, positioning notches are respectively arranged at one ends of the upper cover and the base.

[0011] In any of the above solutions, preferably, the upper cover and the base are assembled by a snap-fit method.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] In the present utility model, due to the design of the saw blade assembly, the saw head performs cutting on hard tissues through reciprocating yawing. At this time, only the saw head and the drive rod perform cutting movement in the installation cavity, and their yawing mass and moment arm are greatly reduced, reducing the vibration caused by the tool itself to the hand of the surgeon holding the saw. The upper cover and the base remain relatively stationary with respect to the oscillating saw body, and the saw blade assembly solves the problems of additional impact on the cutting guide device caused by the saw head and inaccurate cutting paths; moreover, the saw blade assembly adopts a combined design, and the normal use of the saw blade assembly can be maintained by regularly replacing the saw head, reducing the use cost. Description of the Drawings

[0014] Figure 1 This is the overall structural schematic diagram of a detachable saw blade for a surgical oscillating saw of the present utility model;

[0015] Figure 2 This is the structural schematic diagram of the saw blade assembly;

[0016] Figure 3 This is the structural schematic diagram of Embodiment 2.

[0017] Explanation of the reference numerals in the figure:

[0018] 1. Saw blade assembly; 101. Upper cover; 102. Base; 103. Drive rod; 104. Fixed frame; 105. Saw blade head; 106. Movable limit groove; 107. Eccentric through hole; 10301. Connecting rod; 10302. Oval drive piece; 10303. Y-shaped rod; 108. Auxiliary groove; 109. Positioning notch. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1:

[0021] Please refer to Figures 1 to 3, A detachable saw blade for a surgical oscillating saw, including a saw blade assembly 1 for mounting onto the oscillating saw body. The saw blade assembly 1 includes an upper cover 101, a base 102, a drive rod 103, a fixing bracket 104, and a saw head 105. The upper cover 101 and the base 102 are assembled and installed together, and an installation cavity is formed between the upper cover 101 and the base 102. The fixing bracket 104 is fixed in the installation cavity, and the fixing bracket 104 is provided with a movable limiting groove 106 corresponding to the positions of the drive rod 103 and the saw head 105. One end of the drive rod 103 is provided with an elliptical eccentric through hole 107. The drive rod 103 is located in the movable limiting groove 106. The other end of the drive rod 103 is rotatably connected to one end of the saw head 105 through a pin shaft. An installation disk is axially fixed at the working end of the oscillating saw body, and an eccentric shaft is eccentrically fixed on the installation disk. The eccentric shaft passes through the eccentric through hole 107; after the saw blade assembly 1 is taken out, it will be installed at the corresponding position of the oscillating saw body. The drive rod through hole in the saw blade assembly 1 is placed into the corresponding eccentric rotary mechanism of the oscillating saw body. The saw head and the drive rod are firmly clamped by the upper cover and the base. After the saw blade assembly is clamped, it remains relatively stationary with respect to the oscillating saw body. After the oscillating saw starts to work, when the eccentric rotary mechanism moves, only the drive rod will be moved left and right. Since the drive rod through hole is installed in the installation cavity, the drive rod will perform reciprocating deflection;

[0022] In this embodiment, the movable limiting groove 106 is tadpole-shaped, and the head of the movable limiting groove 106 is used to install one end of the drive rod 103. The tail of the movable limiting groove 106 is open, and the tail of the movable limiting groove 106 is used to install the saw head 105; the movable limiting groove 106 is used to limit the movement range of the drive rod 103, thereby preventing the drive rod 103 from swinging too much.

[0023] Embodiment 2:

[0024] In this embodiment, the drive rod 103 includes a connecting rod 10301, an elliptical drive piece 10302, and a Y-shaped rod 10303. The elliptical eccentric through hole 107 is provided on the elliptical drive piece 10302. There are two groups of connecting rods 10301, and the two groups of connecting rods 10301 are symmetrically arranged on the elliptical drive piece 10302 along the center line of the installation cavity. One end of the connecting rod 10301 is rotatably connected to the elliptical drive piece 10302, and the other end of the connecting rod 10301 is rotatably connected to the Y-shaped rod 10303. One end of the Y-shaped rod 10303 is rotatably connected to the saw head 105; by using the cooperation of the connecting rod 10301 with the elliptical drive piece 10302 and the Y-shaped rod 10303, the swing amplitude of the drive rod 103 is further reduced, making the saw blade assembly 1 vibrate less during use.

[0025] In this embodiment, auxiliary grooves 108 are respectively provided on the inner sides of the upper cover 101 and the base 102 corresponding to the rotation axis positions of the Y-shaped rod 10303; the auxiliary grooves 108 can assist in positioning the movement range of the rotation axis.

[0026] In this embodiment, positioning notches 109 are respectively provided at one ends of the upper cover 101 and the base 102; the positioning and installation of the saw blade assembly 1 are completed by using the positioning notches 109, improving the installation efficiency.

[0027] In this embodiment, the upper cover 101 and the base 102 are assembled by snap fit; through the above design, disassembly and assembly are facilitated.

[0028] The working process of the present utility model is as follows:

[0029] After the saw blade assembly 1 is taken out, it will be installed at the corresponding position of the oscillating saw main body. The drive rod through hole in the saw blade assembly 1 is placed into the corresponding eccentric rotary mechanism of the oscillating saw main body. The saw blade head and the drive rod are firmly clamped by the upper cover and the base. After the saw blade assembly is clamped, it remains relatively stationary with the oscillating saw main body. After the oscillating saw starts to work, when the eccentric rotary mechanism moves, only the drive rod will move left and right. Since the drive rod through hole is installed in the installation cavity, the drive rod will reciprocate and swing; the saw blade head cuts the hard tissue through reciprocating swing. At this time, only the saw blade head and the drive rod perform cutting movement in the installation cavity, and their swing mass and moment arm are greatly reduced, reducing the vibration caused by the tool itself to the hand of the surgeon holding the saw. The upper cover and the base remain relatively stationary with the oscillating saw main body, and the saw blade assembly solves the problem of the saw blade head causing additional impact on the cutting guide device and inaccurate cutting path.

[0030] The above is only the preferred specific embodiment of the present utility model; however, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and its improvement concept of the present utility model, makes equivalent replacement or change, and should be covered by the protection scope of the present utility model.

Claims

1. A detachable saw blade for a surgical oscillating saw, comprising a saw blade assembly (1) for being mounted onto an oscillating saw main body, characterized in that: The saw blade assembly (1) includes an upper cover (101), a base (102), a driving rod (103), a fixing frame (104), and a saw blade head (105). The upper cover (101) and the base (102) are assembled and installed together, and an installation cavity is formed between the upper cover (101) and the base (102). The fixing frame (104) is fixed in the installation cavity, and the fixing frame (104) is provided with a movable limiting groove (106) corresponding to the positions of the driving rod (103) and the saw blade head (105). One end of the driving rod (103) is provided with an elliptical eccentric through hole (107). The driving rod (103) is located in the movable limiting groove (106). The other end of the driving rod (103) is rotatably connected to one end of the saw blade head (105) through a pin shaft. An installation disk is axially fixed to the working end of the swing saw body, and an eccentric shaft is eccentrically fixed on the installation disk. The eccentric shaft passes through the eccentric through hole (107).

2. The detachable saw blade for a surgical reciprocating saw according to claim 1, characterized in that: The movable limiting groove (106) is tadpole-shaped. The head of the movable limiting groove (106) is used to install one end of the driving rod (103). The tail of the movable limiting groove (106) is of an open type, and the tail of the movable limiting groove (106) is used to install the saw blade head (105).

3. The detachable saw blade for a surgical oscillating saw according to claim 2, wherein: The driving rod (103) includes a connecting rod (10301), an elliptical driving piece (10302), and a Y-shaped rod (10303). The elliptical eccentric through hole (107) is arranged on the elliptical driving piece (10302). There are two groups of connecting rods (10301). The two groups of connecting rods (10301) are symmetrically arranged on the elliptical driving piece (10302) along the center line of the installation cavity. One end of the connecting rod (10301) is rotatably connected to the elliptical driving piece (10302), and the other end of the connecting rod (10301) is rotatably connected to the Y-shaped rod (10303). One end of the Y-shaped rod (10303) is rotatably connected to the saw blade head (105).

4. A detachable saw blade for a surgical oscillating saw according to claim 3, characterized in that: Auxiliary grooves (108) are respectively formed in the inner sides of the upper cover (101) and the base (102) corresponding to the rotation axis positions of the Y-shaped rod (10303).

5. A detachable saw blade for a surgical oscillating saw according to claim 1, characterized in that: Positioning notches (109) are respectively arranged at one ends of the upper cover (101) and the base (102).

6. The detachable saw blade for a surgical oscillating saw according to claim 1, characterized in that: The upper cover (101) and the base (102) are assembled and installed in a snap-fit manner.

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