CN215424913U

CN215424913U - Saw blade of swing saw and swing saw

Info

Publication number: CN215424913U
Application number: CN202120381020.3U
Authority: CN
Inventors: 胡森元; 王朋鹤; 孟天宇
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2022-01-07
Anticipated expiration: 2031-02-20

Abstract

The utility model provides a saw blade of a swing saw and the swing saw, and belongs to the technical field of bone cutting instruments. The swing saw blade comprises a saw blade main body and saw teeth, wherein the front end of the saw blade main body is arc-shaped, and the circle center of the front end is superposed with the swing center of the saw blade main body; the saw teeth are arranged along the arc-shaped front end, the tooth root of each saw tooth is provided with a chip groove, each chip groove is arc-shaped, two ends of each chip groove penetrate through two sides of the saw blade main body, and the circle center of each chip groove is superposed with the swing center of the saw blade main body; the sawtooth is double-row sawtooth, and adjacent sawtooth staggers the setting. The utility model can ensure that the sawteeth at all positions are uniformly stressed in the process of osteotomy, can ensure higher osteotomy efficiency and can also avoid uneven wear of the front-end sawteeth. Meanwhile, the chip grooves are formed in the roots of the saw teeth and can be discharged from the two sides of the saw blade main body, so that the broken bone pieces generated in the osteotomy process can be conveniently discharged, and the bone pieces are prevented from remaining in the body.

Description

Saw blade of swing saw and swing saw

Technical Field

The utility model belongs to the technical field of osteotomy instruments, and particularly relates to a saw blade of a swing saw and the swing saw.

Background

At present, a swing saw needs to be used for cutting bones of a distal femur and a proximal tibia to match with a prosthesis in an articular operation, a saw blade of a conventional swing saw is usually rectangular, saw teeth are linearly arranged, and only the saw teeth on two sides are stressed when the swing saw is started, so that the conditions that the saw teeth on two sides are easy to wear and the saw teeth in the middle are not worn easily occur; in addition, the side surface of the conventional saw blade is not provided with sawteeth, the bone cutting efficiency is low, and the saw blade is provided with yin and yang teeth, so that the chips are not convenient to remove.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a saw blade of an oscillating saw and an oscillating saw, which not only facilitate the removal of bone fragments generated during the process of osteotomy of a joint, but also ensure the uniform stress of the saw teeth during the use process, thereby preventing the occurrence of uneven wear of the saw teeth.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a swing saw blade comprises a saw blade main body and saw teeth,

the front end of the saw blade main body is arc-shaped, and the circle center of the front end is superposed with the swing center of the saw blade main body;

the saw teeth are arranged along the arc-shaped front end, chip grooves are formed in the tooth roots of the saw teeth, the chip grooves are arc-shaped, two ends of each chip groove penetrate through two sides of the saw blade main body, and the circle centers of the chip grooves are overlapped with the swing center of the saw blade main body;

the sawtooth is double-row sawtooth, and adjacent sawtooth staggers the setting.

As a preferable scheme of the oscillating saw blade, the saw blade body is provided with two chip grooves which are symmetrically arranged on the upper surface and the lower surface of the saw blade body.

As a preferable scheme of the oscillating saw blade, the saw blade body is further provided with a plurality of parallel grooves, and the grooves are formed along the length direction of the saw blade body and communicated with the chip grooves.

As a preferable scheme of the saw blade of the oscillating saw, a through hole is formed in the tail end, far away from the chip groove, of the groove, and the through hole is perpendicular to the saw blade body.

As a preferable embodiment of the oscillating saw blade, a plurality of grooves are formed on both the upper surface and the lower surface of the blade body.

As a preferable scheme of the oscillating saw blade, the groove on the upper surface of the blade body and the groove on the lower surface of the blade body are arranged in a staggered manner.

As a preferable mode of the oscillating saw blade, the cross-sectional shape of the chip groove is a circular arc.

As a preferable scheme of the oscillating saw blade, two ends of the chip groove are gradually enlarged openings towards the outer side.

As a preferable scheme of the oscillating saw blade, the saw blade main body includes an extension part and a head part, one end of the extension part is connected with the head part, the other end of the extension part is connected with the oscillating saw, the head part is of an expanded structure, and the distance between two sides of any position of the head part is larger than the distance between two sides of the extension part.

An oscillating saw is provided with the oscillating saw blade.

According to the utility model, the front end of the saw blade main body is arc-shaped, and the circle center of the front end is superposed with the swing center of the saw blade main body, so that uniform stress of sawteeth at each position can be ensured in the osteotomy process, higher osteotomy efficiency can be ensured, and uneven wear of the sawteeth at the front end can be avoided. Meanwhile, the chip grooves are formed in the roots of the saw teeth and can be discharged from the two sides of the saw blade main body, so that the broken bone pieces generated in the osteotomy process can be conveniently discharged, and the bone pieces are prevented from remaining in the body.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a front view of an oscillating saw blade according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the oscillating saw blade of FIG. 1 taken along the line A-A;

FIG. 3 is a front view of another embodiment of an oscillating saw blade.

Description of reference numerals:

1. a saw blade body; 2. saw teeth; 3. a chip groove; 4. a groove; 5. a through hole;

11. an extension portion; 12. a head portion; 111. and fixing the clamping groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail with reference to [ F1] in conjunction with examples.

As shown in fig. 1-2, the present embodiment provides an oscillating saw blade, which includes a blade body 1 and saw teeth 2, wherein the front end of the blade body 1 is arc-shaped, and the center of the front end coincides with the swing center of the blade body 1; the saw teeth 2 are arranged along the front end of the circular arc shape, the tooth root of the saw teeth 2 is provided with a chip groove 3, the chip groove 3 is in the shape of the circular arc, two ends of the chip groove 3 penetrate through two sides of the saw blade main body 1, and the circle center of the chip groove 3 coincides with the swing center of the saw blade main body 1. In this embodiment, the front end of saw bit main part 1 is arc to the centre of a circle of front end and the coincidence of the swing center of saw bit main part 1 can guarantee to guarantee that the sawtooth 2 atress of each position is even at the osteotomy in-process, can enough guarantee higher osteotomy efficiency, can also avoid the inhomogeneous wearing and tearing of front end sawtooth 2. Meanwhile, the chip grooves 3 are formed in the roots of the saw teeth 2, the chip grooves 3 can be discharged from the two sides of the saw blade main body 1, the broken bone pieces generated in the process of cutting the bone can be conveniently discharged, and the bone fragments are prevented from remaining in the body.

The saw teeth 2 are double rows of saw teeth. The adjacent sawteeth 2 are staggered up and down, and the sawteeth 2 are triangular sawteeth.

In this embodiment, the number of the chip removal grooves 3 is two, the chip removal grooves are symmetrically arranged on the upper surface and the lower surface of the saw blade main body 1, and the tooth root of each row of the saw teeth 2 is provided with the corresponding chip removal groove 3, so that the chip removal effect is ensured.

In the present embodiment, the cross section of the chip discharge groove 3 is arc-shaped, so the bottom of the chip discharge groove 3 is smooth, has no dead angle, is easy to discharge bone chips, is difficult to generate bone chip residue, and ensures good chip discharge effect.

In the embodiment, the two ends of the chip discharge groove 3 are gradually opened towards the outer side, so that the larger outlet and the smaller resistance are ensured when the bone chips are discharged, and the chips are easily discharged.

The saw blade main body 1 is also provided with a plurality of parallel grooves 4, and the grooves 4 are formed along the length direction of the saw blade main body 1 and communicated with the chip grooves 3. The bone chips in the chip removal groove 3 can be discharged outwards along the groove 4, a chip removal channel is added, and the chip removal effect is better. In this embodiment, the groove 4 has a size of 2mm wide and 0.5mm deep. In other embodiments, the groove 4 may also be of other dimensions.

In other embodiments, as shown in fig. 3, the end of the recess 4 remote from the junk slots 3 is provided with a through hole 5, the through hole 5 being arranged perpendicular to the blade body 1. Through setting up this through-hole 5, recess 4 can continuously outwards chip removal, is favorable to arranging the bone bits to the place far away from the operation position, changes to wash and scrub the bone bits, avoids the bone bits to remain in vivo.

A plurality of grooves 4 are provided on both the upper and lower surfaces of the blade body 1. The groove 4 on the upper surface of the saw blade body 1 and the groove 4 on the lower surface of the saw blade body 1 are arranged in a staggered manner. For example three or more grooves 4 per face. More chip removal can be realized to a plurality of recesses 4, and what the setting stagger of recess 4 of upper surface and recess 4 of lower surface can avoid saw bit main part 1 to have recess 4's position too weak, guarantees that the saw bit has sufficient intensity.

In this embodiment, the saw blade body 1 includes an extension portion 11 and a head portion 12, one end of the extension portion 11 is connected to the head portion 12, and the other end of the extension portion 11 is connected to the oscillating saw, and specifically, the other end of the extension portion 11 is provided with a fixing slot 111 connected to the oscillating saw. The head 12 of the saw blade body 1 is an expanded structure, and the distance between two sides of any position of the head 12 is larger than the distance between two sides of the extension part 11. The expanding structure of the head 12 can increase the number of the saw teeth 2 and improve the bone cutting efficiency.

The embodiment also provides the swing saw, which is provided with the swing saw blade, has a better chip removal effect, can ensure that the saw teeth 2 are uniformly stressed, and has high bone cutting efficiency and long service life.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an oscillating saw blade, includes saw blade main part (1) and sawtooth (2), its characterized in that:

the front end of the saw blade main body (1) is arc-shaped, and the circle center of the front end is superposed with the swing center of the saw blade main body (1);

the saw teeth (2) are arranged along the arc-shaped front end, a chip groove (3) is formed in the tooth root of each saw tooth (2), each chip groove (3) is arc-shaped, two ends of each chip groove (3) penetrate through two sides of the saw blade main body (1), and the circle center of each chip groove (3) is superposed with the swing center of the saw blade main body (1);

the sawteeth (2) are double-row sawteeth, and the adjacent sawteeth (2) are arranged in a staggered manner.

2. The oscillating saw blade of claim 1, wherein: the two chip grooves (3) are symmetrically arranged on the upper surface and the lower surface of the saw blade main body (1).

3. The oscillating saw blade of claim 2, wherein: the saw blade is characterized in that the saw blade main body (1) is further provided with a plurality of grooves (4) which are parallel to each other, and the grooves (4) are formed in the length direction of the saw blade main body (1) and communicated with the chip grooves (3).

4. The oscillating saw blade of claim 3, wherein: the tail end of the groove (4) far away from the chip groove (3) is provided with a through hole (5), and the through hole (5) is vertical to the saw blade main body (1).

5. The oscillating saw blade of claim 3, wherein: the upper surface and the lower surface of the saw blade main body (1) are provided with a plurality of grooves (4).

6. The oscillating saw blade of claim 5, wherein: the groove (4) on the upper surface of the saw blade main body (1) and the groove (4) on the lower surface of the saw blade main body (1) are arranged in a staggered mode.

7. The oscillating saw blade according to claim 1 or 2, wherein: the cross section of the chip groove (3) is arc-shaped.

8. The oscillating saw blade of claim 7, wherein: the two ends of the chip groove (3) are provided with gradually-expanding openings towards the outer side.

9. The oscillating saw blade of claim 1, wherein: saw bit main part (1) includes extension (11) and head (12), extension (11) one end with head (12) are connected, extension (11) other end is connected with the pendulum saw, head (12) are the enlarged structure, the interval of the both sides of the optional position of head (12) all is greater than the interval of the both sides of extension (11).

10. An oscillating saw, characterized in that: an oscillating saw blade according to any of claims 1 to 9.