CN220558057U - Medical reciprocating saw blade - Google Patents

Abstract

The application relates to a medical reciprocating saw blade, which is connected to a reciprocating saw handle and comprises a handle and at least two saw blade bodies. Each saw blade body is provided with a connecting part and a cutting part deviating from the connecting part, each saw blade body extends along the axial direction of the handle part, each saw blade body is sequentially arranged at intervals in parallel and is connected to one end of the handle part through the corresponding connecting part, the cutting part is provided with a plurality of saw teeth which are sequentially arranged, and the outline of the cutting part is arc-shaped. Because the contour of each cutting part is designed to be arc-shaped, compared with the linear edge shape design mode in the related art, when the contour of each cutting part is in primary contact with the outer surface of bone tissue, the contour of each cutting part is tangent to the bone tissue, the pressure intensity at the tangent point is higher, the contour of each cutting part can easily enter the bone tissue, a certain positioning function is realized on the saw blade after the tangent point enters the bone tissue, the saw blade is accurate and reliable, the error can be reduced to the minimum, the parallelism of the sawed groove is higher, and compared with the anastomosis degree of the prosthesis, the sawed groove of the cutter in the related art is higher.

Description

Medical reciprocating saw blade

Technical Field

The application relates to the technical field of medical instruments, in particular to a medical reciprocating saw blade.

Background

In orthopedic surgery, a medical reciprocating saw is a commonly used tool for sawing bone, for reciprocating over bone tissue, to cut a recess that accommodates a prosthesis, to facilitate implantation of the prosthesis. In the related art, a medical reciprocating saw includes a reciprocating saw handle and a saw blade. The reciprocating saw handle is connected with the saw blade and used for clamping the saw blade and accessing external power to drive the saw blade to perform high-frequency reciprocating motion so as to realize the cutting of bone tissues. However, in the initial stage of cutting bone tissue, the saw blade easily shifts and slides on the surface of bone tissue during the initial contact of bone tissue, resulting in deviation of the shape of the groove cut on bone tissue from the preset shape, and a low degree of fit of the groove with the prosthesis.

Disclosure of Invention

Based on this, it is necessary to overcome the drawbacks of the prior art and to provide a medical reciprocating saw blade which is capable of improving the machining quality of the grooves so that the degree of anastomosis with the prosthesis is higher.

A medical reciprocating saw blade connected to a reciprocating saw handle, the medical reciprocating saw blade comprising a handle and at least two blade bodies; each saw blade body is provided with a connecting part and a cutting part deviating from the connecting part, each saw blade body extends along the axial direction of the handle part, the saw blade bodies are sequentially arranged at intervals in parallel and are connected to one end of the handle part through the connecting parts, the cutting part is provided with a plurality of saw teeth which are sequentially arranged, and the outline of the cutting part is arc-shaped.

In one of the embodiments, the edge profile of the blade body is circular arc or elliptical arc shaped.

In one embodiment, at least one of the teeth is bent toward either side of the blade body.

In one embodiment, the saw teeth bent toward one side of the saw blade body are first teeth, the saw teeth bent toward the other side of the saw blade body are second teeth, and the first teeth and the second teeth are sequentially and alternately arranged on the saw blade body.

In one embodiment, the first tooth positions of two adjacent blade bodies are correspondingly arranged, and the second tooth positions of two adjacent blade bodies are correspondingly arranged.

In one embodiment, the saw blade body is provided in two, and the saw teeth of the two saw blade bodies are bent towards each other and are sequentially and alternately arranged.

In one embodiment, the blade body is provided in two; the saw blade comprises a saw blade body, wherein saw teeth which are bent towards the other saw blade body on each saw blade body are set to be third teeth, saw teeth which are not bent on each saw blade body are set to be fourth teeth, and the third teeth and the fourth teeth are sequentially and alternately arranged on the saw blade body; the third tooth of each blade body is disposed in correspondence with the fourth tooth position of the other blade body, and the fourth tooth of each blade body is disposed in correspondence with the third tooth position of the other blade body.

In one embodiment, a first mounting groove is formed in one end, connected with the saw blade body, of the handle part, and the saw blade body stretches into the first mounting groove to be connected with the handle part by laser welding; and/or the saw blade body is provided with a second mounting groove, the handle part is provided with an inserting part which stretches into the second mounting groove, and the inserting part stretches into the second mounting groove and is connected by adopting laser welding.

In one embodiment, a first mounting plate is arranged at one end of the handle, at least two first mounting grooves which are sequentially arranged at intervals are formed in the first mounting plate, and the first mounting grooves penetrate through two opposite plate surfaces of the first mounting plate; the first mounting plate is provided with bosses located between two adjacent saw blade bodies, and the bosses are respectively abutted to the two saw blade bodies.

In one embodiment, the shank portion is provided with a mounting hole at an end thereof remote from the blade body for connection with the reciprocating saw handle.

According to the medical reciprocating saw blade, the contour of each cutting part is designed to be arc-shaped, compared with the linear edge shape design mode in the related art, when the medical reciprocating saw blade is in primary contact with the outer surface of bone tissue, the contour of each cutting part is tangential to the bone tissue, the pressure intensity at the cutting point is higher than that of the cutting part, the medical reciprocating saw blade can easily enter the bone tissue, and after the cutting point enters the bone tissue, the medical reciprocating saw blade has a certain positioning function, so that sawing is more accurate and reliable, sawing errors are reduced to the minimum, and the parallelism of grooves sawed is higher, and compared with the anastomosis degree of a prosthesis, the grooves sawed by a cutter in the related art are higher.

Drawings

Fig. 1 is a schematic structural view of a medical reciprocating saw blade according to an embodiment of the present application.

Fig. 2 is another view block diagram of the structure shown in fig. 1.

Fig. 3 is a view of still another view of the structure of fig. 1.

Fig. 4 is a view of a structure of fig. 1.

Fig. 5 is a schematic view of a medical reciprocating saw blade according to another embodiment of the present application.

Fig. 6 is another view block diagram of the structure shown in fig. 5.

Fig. 7 is a schematic view of a medical reciprocating saw blade according to yet another embodiment of the present application.

Fig. 8 is another view block diagram of the structure shown in fig. 7.

Fig. 9 is a view of still another view of the structure of fig. 7.

Fig. 10 is a block diagram of a single blade body in the configuration shown in fig. 7.

10. A handle; 11. a first mounting plate; 111. a first mounting groove; 112. welding seams; 113. a boss; 12. a second mounting plate; 121. a mounting hole; 13. a transition section; 20. a saw blade body; 21. saw teeth; 211. a first tooth; 212. a second tooth; 213. a third tooth; 214. and a fourth tooth.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

Referring to fig. 1 or fig. 7, fig. 1 and fig. 7 respectively show schematic structural diagrams of a medical reciprocating saw blade according to two different embodiments of the present application, and the medical reciprocating saw blade according to one embodiment of the present application is connected to a reciprocating saw handle (not shown in the drawings), and includes: handle 10 and at least two blade bodies 20. Wherein, every saw blade body 20 has connecting portion and the cutting portion that deviates from the connecting portion, and each saw blade body 20 extends along the axial direction of stalk portion 10, and each saw blade body is parallel interval in proper order and is connected in the one end of stalk portion 10 through respective connecting portion, and the cutting portion is equipped with a plurality of saw teeth 21 that arrange in proper order, and the profile of cutting portion is the arcuation.

According to the medical reciprocating saw blade, the contour of each cutting part is designed to be arc-shaped, compared with the linear edge shape design mode in the related art, when the medical reciprocating saw blade is in primary contact with the outer surface of bone tissue, the contour of each cutting part is tangential to the bone tissue, the pressure intensity at the cutting point is higher than that of the cutting part, the medical reciprocating saw blade can easily enter the bone tissue, and after the cutting point enters the bone tissue, the medical reciprocating saw blade has a certain positioning function, so that sawing is more accurate and reliable, sawing errors are reduced to the minimum, and the parallelism of grooves sawed is higher, and compared with the anastomosis degree of a prosthesis, the grooves sawed by a cutter in the related art are higher.

Referring to fig. 1 and 7, in one embodiment, the edge profile of the blade body 20 is circular or elliptical. Specifically, in this embodiment, the edge profile of the saw blade body 20 is designed to be a semi-circular arc shape, when the saw blade body is primarily contacted with bone tissue, the edge profile of the saw blade body 20 is tangent to the bone tissue, the pressure at the tangent point is strong, the saw blade is easier to enter the bone tissue, and after the tangent point enters the bone tissue, a certain positioning function is achieved on the saw blade, so that sawing is more accurate and reliable, sawing errors are further reduced to the minimum, and the parallelism of the sawed grooves is higher, and compared with the anastomosis degree of the prosthesis, the grooves sawed by the cutter in the related art are higher.

In one embodiment, the number of blade bodies 20 may be one, two, three or more. Wherein, the number of the saw blade bodies 20 is at least two, and all the saw blade bodies 20 are arranged in parallel and at intervals in sequence. In addition, at least one of the teeth 21 is bent toward either side of the blade body 20. Thus, in use, the reciprocating saw handle drives the handle 10 in motion, the handle 10 driving all of the blade body 20 on its end to reciprocate to chip bone tissue reciprocally. Particularly, when the blade body 20 is provided in at least two and sequentially connected to the handle 10 in parallel at intervals, and the saw teeth 21 are bent toward either side of the blade body 20, the width of the contact area with bone tissue is greater with respect to the single blade body 20, so that a groove of a desired width can be formed by one sawing, and bone fragments generated during the sawing can be discharged outwardly through the interval between the adjacent two blade bodies 20. And then can cut out the recess of implantation prosthesis high-efficiently, efficiency improves, safe and reliable more, and the operation is more convenient.

It should be noted that, the bending of the saw teeth 21 in the bending direction of any side surface of the saw blade body 20 may be to bend the saw teeth 21 in a fold line manner, bend the saw teeth 21 in an arc manner, or bend the saw teeth 21 in other manners, which can be flexibly adjusted and set according to actual requirements. Since the saw teeth 21 are bent towards the side of the blade body 20, i.e. the saw teeth 21 are not in the same plane as the side of the blade body 20, but are tilted towards the side of the blade body 20, the width of the contact area with bone tissue is larger, which is advantageous for forming grooves of a desired width by one sawing.

In some embodiments, the angle at which the teeth 21 are bent toward either side of the blade body 20 is acute, specifically, for example, 10 ° -60 °, with the greater the angle, the greater the width of the contact area with bone tissue; conversely, when the angle is smaller, the width of the contact area with the bone tissue is correspondingly smaller. When the angle is close to 90 deg., the cutting effect on bone tissue will be reduced as the saw teeth 21 are close to perpendicular to the side of the blade body 20 and thus close to parallel to the bone tissue.

The size of the groove formed on the bone tissue is correspondingly set according to the size of the prosthesis to be implanted, and when the size of the prosthesis is increased, the size of the groove is correspondingly increased; as the size of the prosthesis decreases, the size of the recess correspondingly decreases. In general, the width of the majority of the prostheses is, for example, designed to be 2mm to 5mm, in particular, for example, 3mm to 3.5mm, so that the width of the contact area of the respective blade body 20 of the medical reciprocating saw with bone tissue is, for example, controlled to be 3mm to 3.5mm, so that a single cutting of bone tissue to form the recess can be achieved.

In this embodiment, the two saw blade bodies 20 are disposed in parallel at a distance of W, for example, 3mm to 3.5mm, and the distance of the two side surfaces of the two saw blade bodies 20 facing away from each other is controlled to 3mm to 3.5mm, corresponding to the width of the bone tissue contacting area. Of course, as the width dimension of the recess increases, i.e., as the width dimension of the area of contact with bone tissue is required to be greater than 3.5mm, the number of blade bodies 20 increases accordingly.

Referring to fig. 1-4, fig. 2-4 show three different view angle block diagrams of the structure of fig. 1, respectively. In one embodiment, the teeth 21 of the blade body 20 bent toward one of the sides are provided as first teeth 211, and the teeth 21 of the blade body 20 bent toward the other side are provided as second teeth 212. The first teeth 211 and the second teeth 212 are sequentially alternately arranged on the blade body 20. In this way, since the saw blade body 20 is provided with the first teeth 211 bent alternately toward one side and the second teeth 212 bent toward the other side, respectively, it is possible to advantageously increase the width of the contact area with the bone tissue and to improve sawing efficiency.

The first teeth 211 and the second teeth 212 may be alternately arranged according to 1-to-1 arrangement, in other words, one second tooth 212 is arranged after each first tooth 211 is arranged, or may be alternately arranged according to 2-to-2 arrangement, in other words, two second teeth 212 are arranged after each two first teeth 211 are arranged, or may be alternately arranged according to 1-to-2 arrangement, in other words, two second teeth 212 are arranged after each first tooth 211 is arranged, or may be arranged according to other arrangements, which will not be described herein.

Referring to fig. 1-4, in one embodiment, the first teeth 211 of two adjacent blade bodies 20 are positioned to correspond to each other and the second teeth 212 of two adjacent blade bodies 20 are positioned to correspond to each other. In this way, the spacing between two adjacent blade bodies 20 is sufficiently large relative to the arrangement of the first teeth 211 and the second teeth 212, so that a sufficiently large chip space is available for better chip removal.

Of course, the saw teeth 21 of two adjacent saw blade bodies 20 may have no obvious position correspondence, may be flexibly arranged in other manners, and may be specifically adjusted and set according to actual requirements, which is not described herein.

Referring to fig. 5 and 6, fig. 5 is a schematic structural view of a medical reciprocating saw blade according to another embodiment of the present application. Fig. 6 shows another view block diagram of the structure shown in fig. 5. In one embodiment, the blade body 20 is provided in two, and the respective saw teeth 21 of the two blade bodies 20 are bent toward each other and are alternately arranged in sequence. Therefore, the high cutting efficiency of bone tissues can be realized, and meanwhile, the chip removing space is large enough, so that the chip removing performance is not affected.

It should be noted that bending each of the saw teeth 21 of the two blade bodies 20 toward each other means that each of the saw teeth 21 of one of the blade bodies 20 is bent toward the other blade body 20, and each of the saw teeth 21 of the other blade body 20 is bent toward one of the blade bodies 20.

It should be further noted that, the respective saw teeth 21 of the two saw blade bodies 20 are alternately arranged in turn means that each saw tooth 21 of one saw blade body 20 corresponds to the spaced position of the adjacent two saw teeth 21 on the other saw blade body 20; similarly, each of the teeth 21 of the other blade body 20 corresponds to the spaced apart location of two adjacent teeth 21 on one of the blade bodies 20.

Referring now to fig. 7-10, fig. 8 and 9 illustrate two different perspective structural views of the structure of fig. 7, respectively, and fig. 10 illustrates a structural view of a single blade body 20 in the structure of fig. 7. In one embodiment, the blade body 20 is provided in two. The saw teeth 21 of each blade body 20, which are bent toward the other blade body 20, are provided with third teeth 213, and the saw teeth 21 of each blade body 20, which are not bent, are provided with fourth teeth 214. The third teeth 213 and the fourth teeth 214 are sequentially alternately arranged on the blade body 20.

Note that, the sequential alternating arrangement of the third teeth 213 and the fourth teeth 214 is similar to the sequential alternating arrangement of the first teeth 211 and the second teeth 212, and will not be described herein.

Referring to fig. 7-10, in one embodiment, the third tooth 213 of each blade body 20 is positioned corresponding to the fourth tooth 214 of the other blade body 20, and the fourth tooth 214 of each blade body 20 is positioned corresponding to the third tooth 213 of the other blade body 20. Therefore, the high cutting efficiency of bone tissues can be realized, and meanwhile, the chip removing space is large enough, so that the chip removing performance is not affected.

Referring to fig. 7 to 10, in one embodiment, the third tooth 213 and the fourth tooth 214 of each blade body 20 are alternately arranged one after another in sequence, and the third tooth 213 of each blade body 20 corresponds to the fourth tooth 214 of the other blade body 20. Therefore, when the bone tissue is cut, the cutting efficiency is higher, the stress of the bone tissue is more balanced, the parallelism of the sawed grooves is higher, and compared with the matching degree of the prosthesis, the sawed grooves of the cutter in the related art are higher. In addition, the chip removal space is large enough, and the chip removal performance is not affected.

It should be noted that the connection between the blade body 20 and the handle 10 in this embodiment includes, but is not limited to, welding, bonding, clamping, or fastening using screws, pins, rivets, etc., which are not limited herein. Likewise, the connection between the handle 10 and the handle of the reciprocating saw may be configured in various manners according to actual needs, and will not be described herein.

Referring to fig. 1, 3 and 4, in one embodiment, a first mounting groove 111 is formed at an end of the shank portion 10 connected to the blade body 20, and the blade body 20 is inserted into the first mounting groove 111 to be connected to the shank portion 10 by laser welding, and a weld 112 is formed on the shank portion 10. And/or the blade body 20 is provided with a second mounting groove, and the shank 10 is provided with an insertion portion extending into the second mounting groove, into which the insertion portion extends and is connected by laser welding. In this way, a quick and stable connection of the blade body 20 to the shank 10 can be achieved and reliability is ensured by laser welding.

In one embodiment, since the blade body 20 is in the shape of a sheet, the first mounting grooves 111 formed in the handle 10 are correspondingly formed as strip-shaped holes, for example, two strip-shaped holes are formed at intervals, so that the two blade bodies 20 can be mounted, and the processing and the assembly are convenient and easy to implement.

Referring to fig. 1, 3 and 4, in one embodiment, a handle 10 is provided with a first mounting plate 11 at one end. At least two first mounting grooves 111 are formed in the first mounting plate 11 at intervals in sequence, and the first mounting grooves 111 penetrate through two opposite plate surfaces of the first mounting plate 11. In this way, since the end of the handle 10 is provided as the first mounting plate 11, it is convenient to mount at least two saw blade bodies 20 in at least two first mounting grooves 111 respectively, and after mounting, the saw blade bodies 20 can be arranged at intervals in parallel, and the stability is good.

Referring to fig. 1, 3 and 4, in one embodiment, the first mounting plate 11 is provided with a boss 113 between two adjacent blade bodies 20. The bosses 113 are respectively abutted against the two blade bodies 20. In this manner, the boss 113 enhances the stability of the blade body 20 on the shank 10, allowing for adequate stability during cutting of bone tissue.

It should be noted that, the "boss 113" may be "a part of the first mounting plate 11", that is, the "boss 113" is integrally formed with "other parts of the first mounting plate 11"; or a separate member which is separable from the other portion of the first mounting plate 11, i.e., the boss 113 may be manufactured separately and then combined with the other portion of the first mounting plate 11 into a single body.

Referring to fig. 1, in one embodiment, the shank 10 is provided at the other end with a mounting hole 121 and is mounted to the reciprocating saw handle through the mounting hole 121. Specifically, the second mounting plate 12 is provided at the other end of the shank 10, and the mounting hole 121 is provided in the second mounting plate 12. Alternatively, the plate surface of the second mounting plate 12 is parallel to the blade body 20 and perpendicular to the plate surface of the first mounting plate 11.

Referring to fig. 1, in one embodiment, the handle 10 further includes a transition 13 connected between the first mounting plate 11 and the second mounting plate 12. The cross-sectional dimension of the transition portion 13 gradually changes from one end to the other end thereof, so as to realize stable connection with the first mounting plate 11 and the second mounting plate 12 respectively.

Referring to fig. 1-4, in one embodiment, a medical reciprocating saw includes a saw blade of any of the embodiments described above, and further includes a reciprocating saw handle to which the saw blade is coupled.

According to the medical reciprocating saw, the contour of each cutting part is designed to be arc-shaped, compared with the linear edge shape design mode in the related art, when the contour of each cutting part is in primary contact with the outer surface of bone tissue, the contour of each cutting part is tangent to the bone tissue, the pressure intensity at the cutting point is higher than that of the cutting part, the cutting part can easily enter the bone tissue, and after the cutting point enters the bone tissue, the saw blade can be positioned to a certain degree, so that the saw cutting is more accurate and reliable, the saw cutting error is reduced to the minimum, the parallelism of the saw cutting groove is higher, and the matching degree of the saw cutting groove of a cutter in the related art is higher.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A medical reciprocating saw blade connected to a reciprocating saw handle, characterized in that the medical reciprocating saw blade comprises a handle and at least two blade bodies; each saw blade body is provided with a connecting part and a cutting part deviating from the connecting part, each saw blade body extends along the axial direction of the handle part, the saw blade bodies are sequentially arranged at intervals in parallel and are connected to one end of the handle part through the connecting parts, the cutting part is provided with a plurality of saw teeth which are sequentially arranged, and the outline of the cutting part is arc-shaped.

2. The medical reciprocating saw blade of claim 1, wherein an edge profile of said blade body is rounded or elliptically rounded.

3. The medical reciprocating saw blade of claim 1, wherein at least one of said teeth is bent toward either side of said blade body.

4. A medical reciprocating saw blade according to claim 3, wherein the teeth of said blade body bent towards one of the sides are provided with first teeth, the teeth of said blade body bent towards the other side are provided with second teeth, said first teeth and said second teeth being alternately arranged in sequence on said blade body.

5. The medical reciprocating saw blade of claim 4, wherein said first tooth positions of adjacent two of said blade bodies are disposed in correspondence and said second tooth positions of adjacent two of said blade bodies are disposed in correspondence.

6. The medical reciprocating saw blade according to claim 1, wherein said blade body is provided in two, and each of the teeth of said two blade bodies is bent in a direction toward each other and is alternately arranged in turn.

7. The medical reciprocating saw blade of claim 1, wherein said blade body is provided in two; the saw blade comprises a saw blade body, wherein saw teeth which are bent towards the other saw blade body on each saw blade body are set to be third teeth, saw teeth which are not bent on each saw blade body are set to be fourth teeth, and the third teeth and the fourth teeth are sequentially and alternately arranged on the saw blade body; the third tooth of each blade body is disposed in correspondence with the fourth tooth position of the other blade body, and the fourth tooth of each blade body is disposed in correspondence with the third tooth position of the other blade body.

8. The medical reciprocating saw blade according to claim 1, wherein a first mounting groove is formed in one end of the handle connected with the saw blade body, and the saw blade body extends into the first mounting groove to be connected with the handle by laser welding; and/or the saw blade body is provided with a second mounting groove, the handle part is provided with an inserting part which stretches into the second mounting groove, and the inserting part stretches into the second mounting groove and is connected by adopting laser welding.

9. The medical reciprocating saw blade according to claim 8, wherein a first mounting plate is arranged at one end of the handle, at least two first mounting grooves which are sequentially arranged at intervals are arranged on the first mounting plate, and the first mounting grooves penetrate through two opposite plate surfaces of the first mounting plate; the first mounting plate is provided with bosses located between two adjacent saw blade bodies, and the bosses are respectively abutted to the two saw blade bodies.

10. The medical reciprocating saw blade according to any one of claims 1-9, wherein an end of said handle portion remote from said blade body is provided with a mounting hole for connection with said reciprocating saw handle.