High-stability surgical swing saw

Abstract

The high-stability surgical swing saw comprises a swing saw body and a saw blade assembly, a power assembly, a transmission assembly and a driving assembly are arranged in the swing saw body, the saw blade assembly is installed on the swing saw body and comprises an upper cover, a base, a driving rod, a fixing frame and a saw blade head, and the upper cover and the base are installed together in a combined mode. A mounting cavity is formed between the upper cover and the base, the fixing frame is fixed in the mounting cavity, a movable limiting groove is formed in the position, corresponding to the driving rod and the saw blade head, of the fixing frame, the elliptical 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. A mounting disc is axially fixed to the working end of the driving assembly, an eccentric shaft is eccentrically fixed to the mounting disc, and the eccentric shaft penetrates through the eccentric through hole; according to 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 surgical oscillating saws, and more specifically to a high-stability surgical oscillating saw. Background Art

[0002] An oscillating saw is a surgical tool equipped with a power source used in plastic surgery, which is also referred to as a sagittal saw in some literature; it is mainly composed of a handpiece, which contains a motor and a drive control circuit that controls the action of the motor; the head of this tool extends forward and distally from the handpiece, and a vibrating shaft is installed inside. 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 to cut the tissue being acted on. A drive mechanism is provided inside the housing, which generates power, and this power causes the vibrating shaft and the attached saw blade to move back and forth in a manner that the saw blade is fixed to the vibrating shaft. When the saw is actuated by the drive mechanism in this way, the saw teeth will move in a right / left / right / left pattern close to the tissue they are cutting, and because 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 saw blades adapted thereto can effectively cut bone, these components also have some limitations. Many oscillating saws on the market are equipped with flat saw blades, which not only produce left and right swings but also vibrate in the up and down directions, inevitably rubbing the material surface of the multiple slots of the resection guide. This repeated contact will cause the material defining the slots to wear, and may eventually cause the width of these slots to be too large and no longer accurately define the expected cutting line. Once the resection guide encounters this situation, it needs to be replaced; at the same time, if the cutting saw blade is close to the resection guide and repeatedly contacts it, it will cause the resection guide to The saw blade is not easy to move, which is not conducive to precise cutting. In addition, the weight of the saw blade itself will generate a certain swing inertia during the swinging process, and the saw blade will generate some vibration when it separates from the surface after rubbing against the surface of the resection guide device. This method will generate relatively high vibration due to high-frequency impact during the operation of the swing saw. These vibrations will be transmitted to the surgeon's hand holding the saw through the saw blade. Therefore, the surgeon needs to use some force to resist these vibrations to ensure that the handpiece can be firmly held, which may cause great physical and mental fatigue for the surgeon. The utility model proposes a new solution to the above problems. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a high-stability surgical oscillating saw to solve the technical problems mentioned in the background technology.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A high-stability surgical oscillating saw comprises an oscillating saw body and a saw blade assembly, wherein a power assembly, a transmission assembly and a drive assembly are arranged in the oscillating saw body, the saw blade assembly is mounted on the oscillating saw body, and the saw blade assembly is transmission-connected to the power assembly through the drive assembly and the transmission assembly, the saw blade assembly comprises an upper cover, a base, a drive rod, a fixed frame and a saw blade head, the upper cover and the base are assembled and installed together, and an installation cavity is formed between the upper cover and the base, the fixed frame is fixed in the installation cavity, and a movable limiting groove is provided on the fixed frame corresponding to the position of the drive rod and the saw blade head, an elliptical eccentric through hole is arranged at one end of the drive rod, the drive rod is located in the movable limiting groove, and the other end of the drive rod is rotationally connected to one end of the saw blade head through a pin shaft, a mounting disk is axially fixed to the working end of the drive assembly, an eccentric shaft is eccentrically fixed on the mounting disk, and the eccentric shaft passes through the eccentric through hole.

[0007] Preferably, a tool fixing assembly is provided on the oscillating saw body, and the tool fixing assembly includes a mounting seat, a spring, and a pressure head. The mounting seat is bolted to the oscillating saw body, and the spring is arranged in the mounting seat. A mounting hole is provided at the bottom of the mounting seat, and the top end of the pressure head passes through the mounting hole and is fixed on the spring, and the bottom end of the pressure head presses the saw blade assembly onto the oscillating saw body.

[0008] In any of the above schemes, it is preferred that the movable limiting groove is tadpole-shaped, and the head of the movable limiting groove is used to install one end of the driving rod, and the tail of the movable limiting groove is open-shaped, and the tail of the movable limiting groove is used to install the saw blade head.

[0009] In any of the above schemes, it is preferred that the driving rod includes a connecting rod, an elliptical driving plate, and a Y-shaped rod, the elliptical eccentric through hole is arranged on the elliptical driving plate, the connecting rod is provided with two groups, and the two groups of connecting rods are symmetrically arranged on the elliptical driving plate along the center line of the mounting cavity, one end of the connecting rod is rotatably connected to the elliptical driving plate, the other end of the connecting rod is rotatably connected to the Y-shaped rod, and one end of the Y-shaped rod is rotatably connected to the saw blade head.

[0010] In any of the above schemes, preferably, auxiliary grooves are respectively provided on the inner sides of the upper cover and the base at positions corresponding to the rotation axis of the Y-shaped rod.

[0011] In any of the above solutions, preferably, one end of the upper cover and the base is respectively provided with a positioning notch.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] The design of the saw blade assembly in the utility model is that the saw blade head cuts hard tissue by reciprocating oscillation. At this time, only the saw blade head and the driving rod perform cutting movement in the installation cavity, and the oscillation mass and the lever arm are greatly reduced, thereby reducing the vibration of the tool itself to the surgeon's hand holding the saw. The upper cover and the base remain relatively still with the oscillating saw body. The saw blade assembly solves the problem of inaccurate cutting path caused by additional impact of the saw blade head on the cutting guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a high-stability surgical oscillating saw of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0016] Figure 3 is a structural schematic diagram of a saw blade assembly;

[0017] Figure 4 Another structural schematic diagram of the driving rod.

[0018] Description of the numbers in the figure:

[0019] 1. Oscillating saw body; 2. Saw blade assembly; 101. Power assembly; 102. Transmission assembly; 103. Drive assembly; 201. Upper cover; 202. Base; 203. Drive rod; 204. Fixed frame; 205. Saw blade head; 206. Movable limit groove; 207. Eccentric through hole; 10301. Eccentric shaft; 104. Tool fixing assembly; 10401. Mounting seat; 10402. Spring; 10403. Pressure head; 20301. Connecting rod; 20302. Oval drive plate; 20303. Y-shaped rod; 208. Auxiliary groove; 209. Positioning notch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figures 1 to 4A high-stability surgical oscillating saw comprises an oscillating saw body 1 and a saw blade assembly 2. The oscillating saw body 1 is provided with a power assembly 101, a transmission assembly 102, and a drive assembly 103. The saw blade assembly 2 is mounted on the oscillating saw body 1, and the saw blade assembly 2 is connected to the power assembly 101 through the drive assembly 103 and the transmission assembly 102. The saw blade assembly 2 comprises an upper cover 201, a base 202, a drive rod 203, a fixing frame 204, and a saw blade head 205. The upper cover 201 and the base 202 are assembled and installed together, and the upper cover 201 and the base 202 are connected to the power assembly 101 through the drive assembly 103 and the transmission assembly 102. An installation cavity is formed therebetween, the fixing frame 204 is fixed in the installation cavity, and the fixing frame 204 is provided with a movable limiting groove 206 corresponding to the position of the driving rod 203 and the saw blade head 205, one end of the driving rod 203 is provided with an elliptical eccentric through hole 207, the driving rod 203 is located in the movable limiting groove 206, and the other end of the driving rod 203 is rotatably connected to one end of the saw blade head 205 through a pin shaft, and the working end of the driving assembly 103 is axially fixed with a mounting disk, and an eccentric shaft 10301 is eccentrically fixed on the mounting disk, and the eccentric shaft 10301 passes through the eccentric through hole 207.

[0023] In this embodiment, a tool fixing assembly 104 is provided on the oscillating saw body 1, and the tool fixing assembly 104 includes a mounting seat 10401, a spring 10402, and a pressing head 10403. The mounting seat 10401 is bolted to the oscillating saw body 1, and the spring 10402 is arranged in the mounting seat 10401. A mounting hole is opened at the bottom of the mounting seat 10401. The top end of the pressing head 10403 passes through the mounting hole and is fixed on the spring 10402. The bottom end of the pressing head 10403 presses the saw blade assembly 2 onto the oscillating saw body 1.

[0024] In this embodiment, the movable limiting groove 206 is tadpole-shaped, and the head of the movable limiting groove 206 is used to install one end of the driving rod 203, and the tail of the movable limiting groove 206 is open-shaped, and the tail of the movable limiting groove 206 is used to install the saw blade head 205.

[0025] In this embodiment, the driving rod 203 includes a connecting rod 20301, an elliptical driving plate 20302, and a Y-shaped rod 20303. The elliptical eccentric through hole 207 is arranged on the elliptical driving plate 20302. There are two groups of connecting rods 20301. The two groups of connecting rods 20301 are symmetrically arranged on the elliptical driving plate 20302 along the center line of the mounting cavity. One end of the connecting rod 20301 is rotatably connected to the elliptical driving plate 20302, and the other end of the connecting rod 20301 is rotatably connected to the Y-shaped rod 20303. One end of the Y-shaped rod 20303 is rotatably connected to the saw blade head 205.

[0026] In this embodiment, auxiliary grooves 208 are respectively formed on the inner sides of the upper cover 201 and the base 202 at positions corresponding to the rotation axis of the Y-shaped rod 20303 .

[0027] In this embodiment, a positioning notch 209 is disposed at one end of the upper cover 201 and the base 202 .

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

[0029] After the saw blade assembly 2 is taken out, it will be installed at the corresponding position of the oscillating saw body 1. The driving rod through hole in the saw blade assembly 2 is placed in the eccentric rotating mechanism corresponding to the oscillating saw body. The saw blade head and the driving 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 body. After the oscillating saw starts working, when the eccentric rotating mechanism moves, it will only move the driving rod left and right. Since the driving rod through hole is installed in the installation cavity, the driving rod will reciprocate and swing; the saw blade head cuts hard tissue by reciprocating and swinging. At this time, only the saw blade head and the driving rod make cutting movements in the installation cavity, and its swing mass and force arm are greatly reduced, reducing the vibration of the tool itself on the surgeon's hand holding the tool. The upper cover and the base remain relatively stationary with the oscillating saw body, and the saw blade assembly solves the problem of inaccurate cutting path caused by additional impact of the saw blade head on the cutting guide device.

[0030] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A high-stability surgical oscillating saw, comprising an oscillating saw body (1) and a saw blade assembly (2), wherein the oscillating saw body (1) is provided with a power assembly (101), a transmission assembly (102), and a drive assembly (103), wherein the saw blade assembly (2) is mounted on the oscillating saw body (1), and the saw blade assembly (2) is connected to the power assembly (101) through the drive assembly (103) and the transmission assembly (102), and characterized in that: The saw blade assembly (2) comprises an upper cover (201), a base (202), a driving rod (203), a fixing frame (204), and a saw blade head (205); the upper cover (201) and the base (202) are assembled and installed together, and an installation cavity is formed between the upper cover (201) and the base (202); the fixing frame (204) is fixed in the installation cavity, and the fixing frame (204) is provided with a position corresponding to the driving rod (203) and the saw blade head (205). A movable limiting groove (206), one end of the driving rod (203) is provided with an elliptical eccentric through hole (207), the driving rod (203) is located in the movable limiting groove (206), the other end of the driving rod (203) is rotatably connected to one end of the saw blade head (205) through a pin shaft, and a mounting disk is axially fixed to the working end of the driving assembly (103), an eccentric shaft (10301) is eccentrically fixed on the mounting disk, and the eccentric shaft (10301) passes through the eccentric through hole (207).

2. A high stability surgical oscillating saw according to claim 1, characterized in that: The oscillating saw body (1) is provided with a tool fixing assembly (104), which comprises a mounting seat (10401), a spring (10402), and a pressure head (10403). The mounting seat (10401) is bolted to the oscillating saw body (1), the spring (10402) is arranged in the mounting seat (10401), a mounting hole is provided at the bottom of the mounting seat (10401), the top end of the pressure head (10403) passes through the mounting hole and is fixed on the spring (10402), and the bottom end of the pressure head (10403) presses the saw blade assembly (2) onto the oscillating saw body (1).

3. The high stability surgical oscillating saw according to claim 1, characterized in that: The movable limiting groove (206) is tadpole-shaped, and the head of the movable limiting groove (206) is used to install one end of the driving rod (203), and the tail of the movable limiting groove (206) is open-shaped, and the tail of the movable limiting groove (206) is used to install the saw blade head (205).

4. The high stability surgical oscillating saw according to claim 3, characterized in that: The driving rod (203) comprises a connecting rod (20301), an elliptical driving plate (20302), and a Y-shaped rod (20303); the elliptical eccentric through hole (207) is arranged on the elliptical driving plate (20302); two groups of connecting rods (20301) are arranged, and the two groups of connecting rods (20301) are symmetrically arranged on the elliptical driving plate (20302) along the center line of the installation cavity; one end of the connecting rod (20301) is rotatably connected to the elliptical driving plate (20302), and the other end of the connecting rod (20301) is rotatably connected to the Y-shaped rod (20303); one end of the Y-shaped rod (20303) is rotatably connected to the saw blade head (205).

5. The high stability surgical oscillating saw according to claim 4, characterized in that: Auxiliary grooves (208) are respectively provided on the inner sides of the upper cover (201) and the base (202) at positions corresponding to the rotation axis of the Y-shaped rod (20303).

6. The high stability surgical oscillating saw according to claim 1, characterized in that: One end of the upper cover (201) and the base (202) is respectively provided with a positioning notch (209).

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