CN211271019U

CN211271019U - Minimally invasive scalpel blade, scalpel and scalpel assembly

Info

Publication number: CN211271019U
Application number: CN201920919218.5U
Authority: CN
Inventors: 高尚聚; 李严; 邵苍
Original assignee: Hebei Ruihe Medical Equipment Co ltd
Current assignee: Hebei Ruihe Medical Equipment Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-08-18
Anticipated expiration: 2029-06-18

Abstract

The utility model provides a minimally invasive surgical blade, belonging to the technical field of surgical instruments, comprising a blade main body, wherein both sides are provided with cutting edges, and the middle part is provided with a through hole which penetrates through the blade main body along the length direction of the blade main body and is used for penetrating a guide wire; the tip end of the blade main body is divided into two parts by the through hole; and the connecting part is connected with one end of the blade body, which is far away from the tip end, and is used for being connected with the tool handle. The utility model provides a minimally invasive scalpel and a minimally invasive scalpel assembly. The minimally invasive scalpel assembly comprises a minimally invasive scalpel blade; and one end of the protective sleeve is provided with a sleeve body used for containing the blade main body, the other end of the protective sleeve is provided with a fixing piece used for fixing the connecting part, and the fixing piece can loosen the connecting part when the minimally invasive surgery blade is subjected to pulling force deviating from the supporting plate. The utility model provides a minimal access surgery blade, scalpel and scalpel subassembly has effectively improved skin incision's regularity.

Description

Minimally invasive scalpel blade, scalpel and scalpel assembly

Technical Field

The utility model belongs to the technical field of surgical instruments, more specifically say, relate to a minimal access surgery blade, scalpel and scalpel subassembly.

Background

The scalpel refers to a special knife which consists of a blade and a handle and is used for cutting human or animal body tissues, and is an indispensable important surgical tool in surgical operations. The minimally invasive surgery is generally positioned by a guide wire, and a scalpel is needed to cut the skin along the guide wire after the positioning, but the existing scalpel is simple in structure, multiple knives need to be cut along the guide wire during the cutting, and the cut is irregular.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a minimal access surgery blade, scalpel and scalpel subassembly aims at solving scalpel simple structure, need follow seal wire cutting multitool during the incision, and the uneven technical problem of incision.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a minimally invasive surgical blade comprising: the blade comprises a blade main body, wherein cutting edges are arranged on two sides of the blade main body, and a through hole which penetrates through the blade main body along the length direction of the blade main body and is used for penetrating a guide wire is arranged in the middle of the blade main body; the tip end of the blade main body is divided into two parts by the through hole; and

and the connecting part is connected with one end of the blade main body, which is far away from the tip end, and is used for being connected with the tool handle.

Further, the length direction of the connecting part and the length direction of the blade main body form an obtuse angle.

Further, the connecting portion is located at one side of the through hole.

Further, the connecting portion is integrally formed with the blade body.

The utility model provides a minimal access surgery blade's beneficial effect lies in: compared with the prior art, the utility model discloses minimal access surgery blade has set up the through-hole that runs through blade main part length direction at the middle part of blade main part, can penetrate the free end of seal wire in the through-hole during the use, and the blade main part carries out the incision operation to skin along the seal wire, and only carry out once the cutting can, need not to cut the multitool, has ensured notched neat greatly. The cutting edges are arranged on the two sides of the blade main body, so that the skin on the two sides of the guide wire can be cut simultaneously, the operation speed of skin cutting is improved, the cutting times are reduced, and the cutting regularity is further improved.

The utility model also provides a minimal access surgery sword, include:

the connecting part of the minimally invasive surgical blade is provided with a mounting hole; and

the knife handle is provided with a convex block inserted in the mounting hole.

The utility model provides a minimal access surgery sword's beneficial effect lies in: compared with the prior art, the utility model discloses minimal access surgery sword has adopted above-mentioned minimal access surgery blade, has set up the through-hole that runs through blade main part length direction at the middle part of blade main part, can penetrate the free end of seal wire in the through-hole during the use, and the blade main part carries out incision operation to skin along the seal wire, and only carry out once cut can, need not to cut multitool, has ensured notched neat greatly. The cutting edges are arranged on the two sides of the blade main body, so that the skin on the two sides of the guide wire can be cut simultaneously, the operation speed of skin cutting is improved, the cutting times are reduced, and the cutting regularity is further improved.

The utility model also provides a minimal access surgery sword subassembly, include:

the minimally invasive surgical blade; and

one end of the protective sleeve is provided with a sleeve body used for containing the blade main body, the other end of the protective sleeve is provided with a fixing piece used for fixing the connecting portion, and the fixing piece can loosen the connecting portion when the minimally invasive surgery blade is subjected to pulling force deviating from the fixing piece.

Further, the fixing piece comprises a supporting plate connected with the opening end of the sleeve body and a pressing piece arranged on the supporting plate and used for being matched with the supporting plate to clamp the connecting portion tightly, and the pressing piece can deform to loosen the connecting portion when the minimally invasive surgery blade is subjected to pulling force deviating from the supporting plate.

Further, the crimping piece is provided with two sets and is used for fixing respectively the both ends of connecting portion, every group the crimping piece includes two plastics pothooks that set up relatively, and with a set of two the plastics pothook is used for the cooperation to follow the width direction of connecting portion presss from both sides tightly connecting portion.

Furthermore, an auxiliary table for assisting the knife handle to apply a pulling force deviating from the supporting plate to the minimally invasive surgical blade is further arranged on the supporting plate; the thickness of the auxiliary table is reduced from one end close to the sleeve body to the other end in sequence, and the auxiliary table is located on one side, away from the sleeve body, of the fixing part.

Further, the inner cavity of the sleeve body comprises a first cavity and a second cavity which is positioned on one side of the first cavity far away from the fixing piece and communicated with the first cavity, and the second cavity is gradually inclined towards the direction close to the connecting side of the sleeve body and the fixing piece from the connecting end of the second cavity and the first cavity to the other end;

the opening of first cavity is the wide-mouth that outside-in reduced in proper order, first cavity is kept away from be provided with first dog on the lateral wall of one side of mounting, first dog is located in the opening region of first cavity and with the open area of first cavity is isometric, just first dog with first cavity with form the confession between the lateral wall of one side is connected to the mounting the first passageway that blade main part passes through, be provided with the opening orientation on the first dog first passageway supplies the second passageway that the handle of a knife passes through, first dog is close to one of first passageway is served and still is provided with and is used for blockking the second dog that takes out by interior again after blade main part gets into first cavity completely.

Furthermore, a groove used for being matched with the minimally invasive surgical blade in an inserting mode is formed in the inner side wall of the second stop block, and the length direction of the groove is parallel to the length direction of the first channel.

The utility model provides a minimal access surgery sword subassembly's beneficial effect lies in: compared with the prior art, the utility model discloses minimal access surgery sword subassembly has adopted above-mentioned minimal access surgery blade, has set up the through-hole that runs through blade main part length direction at the middle part of blade main part, can penetrate the free end of seal wire during the use in the through-hole, and the blade main part carries out incision operation to skin along the seal wire, and only carry out once the cutting can, need not to cut multitool, has ensured notched neat greatly. The cutting edges are arranged on the two sides of the blade main body, so that the skin on the two sides of the guide wire can be cut simultaneously, the operation speed of skin cutting is improved, the cutting times are reduced, and the cutting regularity is further improved.

And simultaneously, the utility model provides a minimal access surgery sword subassembly has still set up the protective sheath that is used for protecting minimal access surgery blade to add the mounting that is used for fixed minimal access surgery sword connecting portion at the front end of protective sheath (protective sheath opening place end promptly), and the mounting can minimal access surgery blade receives to deviate from loosen during the pulling force of backup pad connecting portion make when minimal access surgery blade does not use (do not receive the exogenic action promptly), can not place because of the inversion or the slope of protective sheath and invert minimal access surgery blade and fall out by in the protective sheath, only when minimal access surgery blade uses, when the people applys a pulling force of keeping away from the backup pad to minimal access surgery blade, minimal access surgery blade just can be taken out by in the protective sheath, has effectively reduced the risk that minimal access surgery blade takes place the vector when not using.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a minimally invasive surgical blade according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a minimally invasive scalpel according to an embodiment of the present invention;

FIG. 3 is a schematic view of a minimally invasive surgical knife assembly according to an embodiment of the present invention;

FIG. 4 is a schematic side view of a protective sheath according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of the sheath body according to the embodiment of the present invention;

FIG. 6 is a sectional view taken along line A-A of FIG. 5;

FIG. 7 is a sectional view taken along line B-B of FIG. 5;

FIG. 8 is a schematic view of the relative position structure of the minimally invasive scalpel and the sheath body when the front end of the minimally invasive scalpel blade enters the first channel during the operation of separating the minimally invasive scalpel blade from the scalpel handle according to the embodiment of the present invention;

FIG. 9 is a schematic view of the relative position structure of the minimally invasive scalpel and the sheath body when the front end of the minimally invasive scalpel blade enters the first cavity in the operation process of separating the minimally invasive scalpel blade from the scalpel handle according to the embodiment of the present invention;

FIG. 10 is a schematic view of the relative position structure of the minimally invasive scalpel and the sheath body when the minimally invasive scalpel blade enters the second cavity and the scalpel handle enters the first cavity in the operation process of separating the minimally invasive scalpel blade from the scalpel handle adopted by the embodiment of the invention;

fig. 11 is a schematic view of the relative position structure of the minimally invasive scalpel and the sheath body when the knife handle is taken out in the operation process of separating the minimally invasive scalpel blade from the knife handle adopted by the embodiment of the utility model.

In the figure: 10. a minimally invasive surgical blade; 11. a blade body; 12. a blade; 13. a through hole; 14. a connecting portion; 15. mounting holes; 20. a knife handle; 21. a bump; 30. a sleeve body; 40. a fixing member; 41. a support plate; 42. a crimping member; 421. a plastic hook; 50. an auxiliary table; 60. a first cavity; 70. a second cavity; 80. a first stopper; 81. a first channel; 82. a second channel; 83. a second stopper; 84. and (4) a groove.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a minimally invasive surgical blade according to an embodiment of the present invention will now be described. The minimally invasive surgery blade 10 comprises a blade body 11 and a connecting part 14 which is connected with one end, far away from the tip, of the blade body 11 and is used for being connected with a handle 20. Both sides of the blade body 11 are provided with cutting edges 12, and the middle part is provided with a through hole 13 which penetrates through the blade body 11 along the length direction of the blade body 11 and is used for penetrating a guide wire. The tip of the blade body 11 is divided into two parts by the through hole 13.

Before the operation, the handle 20 is connected with the connecting part 14, so that the connection between the handle 20 and the minimally invasive surgery blade 10 is realized. During operation, the free end of the guide wire is inserted into the through hole 13 of the blade body 11, and skin cutting operation is performed along the guide wire.

The embodiment of the utility model provides a minimal access surgery blade 10 compares with prior art, has set up the through-hole 13 that runs through 11 length direction of blade main part at the middle part of blade main part 11, can penetrate the free end of seal wire during the use through-hole 13 in, blade main part 11 carries out incision operation to skin along the seal wire, and only carry out once cut can, need not to cut multitool, has ensured notched neat greatly. The cutting edges 12 are arranged on the two sides of the blade body 11, so that the skin on the two sides of the guide wire can be cut simultaneously, the skin cutting operation speed is improved, the cutting times are reduced, and the cutting regularity is further improved.

As a specific implementation manner of the minimally invasive surgical blade 10 provided by the present invention, please refer to fig. 1, the length direction of the connecting portion 14 and the length direction of the blade main body 11 are arranged in an obtuse angle, so that the handle 20 and the guide wire are located on different straight lines, the guide wire and the hand or the handle 20 are abutted to each other when the operation is avoided, and then the bending phenomenon occurs, thereby ensuring smooth operation of the skin incision operation, improving the operation speed, and further ensuring the regularity of the incision.

As a specific implementation manner of the minimally invasive surgical blade 10 provided by the present invention, please refer to fig. 1, the connecting portion 14 is located at one side of the through hole 13, so that the guide wire can be directly extended upwards after being worn out from the through hole 13, and does not contact with the connecting portion 14, the handle 20, etc., thereby effectively avoiding the risk of mutual abrasion between the guide wire and the connecting portion 14, and further improving the smooth operation of the skin incision operation.

Referring to fig. 1, a connecting portion 14 and a blade body 11 are integrally formed as a specific embodiment of a minimally invasive surgical blade 10 according to the present invention.

The two are integrally formed, so that the stability and the long service life of the structure of the minimally invasive surgical blade 10 are ensured.

The utility model also provides a minimal access surgery sword. Referring to fig. 2, the minimally invasive scalpel comprises a minimally invasive scalpel blade 10 and a scalpel handle 20 connected to the minimally invasive scalpel blade 10. The connecting portion 14 is provided with a mounting hole 15. The handle 20 is provided with a projection 21 inserted into the mounting hole 15.

Before the operation, the lug 21 on the knife handle 20 is inserted into the mounting hole 15 on the connecting part 14, so that the connection between the knife handle 20 and the minimally invasive surgery blade 10 is realized. During operation, the free end of the guide wire is inserted into the through hole 13 of the blade body 11, and skin cutting operation is performed along the guide wire.

The embodiment of the utility model provides a minimal access surgery sword has adopted above-mentioned minimal access surgery blade 10, has set up the through-hole 13 that runs through 11 length direction of blade main part at the middle part of blade main part 11, can penetrate the free end of seal wire during the use through-hole 13 in, blade main part 11 carries out the incision operation to skin along the seal wire, and only carry out once cut can, need not to cut multitool, has ensured notched neat greatly. The cutting edges 12 are arranged on the two sides of the blade body 11, so that the skin on the two sides of the guide wire can be cut simultaneously, the skin cutting operation speed is improved, the cutting times are reduced, and the cutting regularity is further improved.

The utility model also provides a minimal access surgery sword subassembly. Referring to fig. 3 and 4, the minimally invasive scalpel assembly comprises a minimally invasive scalpel blade 10 and a protective sheath. One end of the protective sheath is provided with a sheath body 30 for accommodating the blade body 11, and the other end is provided with a fixing member 40 for fixing the connecting portion 14. The fastener 40 is capable of loosening the coupling portion 14 when the minimally invasive surgical blade 10 is subjected to a pulling force directed away from the fastener 40.

When the minimally invasive surgical blade 10 is not used, the blade body 11 of the minimally invasive surgical blade 10 is inserted into the accommodating cavity of the protective sleeve, and the connecting part 14 is fixed by the fixing part 40. When the minimally invasive surgical blade 10 is used, the bump 21 of the handle 20 is inserted into the mounting hole 15 of the minimally invasive surgical blade 10, the handle 20 is lifted upwards, so that the connecting part 14 breaks loose from the fixing part 40, and then the blade body 11 is pulled out from the protective sleeve.

The embodiment of the utility model provides a minimal access surgery sword subassembly has adopted above-mentioned minimal access surgery blade 10, has set up the through-hole 13 that runs through 11 length direction of blade main part at the middle part of blade main part 11, can penetrate the free end of seal wire during the use through-hole 13 in, blade main part 11 carries out the incision operation along the seal wire to skin, and only carry out once cut can, need not to cut multitool, has ensured notched neat greatly. The cutting edges 12 are arranged on the two sides of the blade body 11, so that the skin on the two sides of the guide wire can be cut simultaneously, the skin cutting operation speed is improved, the cutting times are reduced, and the cutting regularity is further improved.

Meanwhile, the utility model provides a minimal access surgery sword subassembly has still set up the protective sheath that is used for protecting minimal access surgery blade 10 to add the mounting 40 that is used for fixed minimal access surgery sword connecting portion 14 in the front end of protective sheath (being protective sheath opening place end) and establish, and mounting 40 can loosen connecting portion 14 when minimal access surgery blade 10 receives the pulling force that deviates from mounting 40, make when minimal access surgery blade 10 does not use (not receive the exogenic action promptly), can not place because of the inversion of protective sheath or slope and invert minimal access surgery blade 10 and fall out by in the protective sheath, only when minimal access surgery blade 10 uses, when the people applys a pulling force of keeping away from mounting 40 to minimal access surgery blade 10, minimal access surgery blade 10 just can be taken out by in the protective sheath, effectively reduced when not using minimal access surgery blade 10 and taken place the risk of vector.

Referring to fig. 3 and 4, the fixing member 40 includes a supporting plate 41 connected to the opening end of the sheath 30, and a pressing member 42 disposed on the supporting plate 41 and cooperating with the supporting plate 41 to clamp the connecting portion 14, wherein the pressing member 42 can deform to loosen the connecting portion 14 when the minimally invasive surgical blade 10 is pulled by a pulling force away from the supporting plate 41.

The supporting plate 41 and the crimping piece 42 are matched to clamp the connecting part 14, and the operation is convenient.

As a specific embodiment of the minimally invasive surgical knife assembly provided in the present invention, please refer to fig. 3, the pressing members 42 are provided with two sets and respectively used for fixing two ends of the connecting portion 14, each set of pressing members 42 includes two plastic hooks 421 disposed oppositely, and the two plastic hooks 421 in the same set are used for matching with each other to clamp the connecting portion 14 along the width direction of the connecting portion 14.

The plastic hook 421 is easy to obtain, low in cost, and can deform after being subjected to an external force, so that the connecting part 14 is loosened, the blade taking operation is easy to complete, and the use requirements are met.

The fixing member 40 of the present invention may be the plastic hook 421, or may be a magnetic block capable of magnetically adsorbing the minimally invasive surgical blade 10, or may be another fixing device capable of achieving the function of the fixing member 40.

Referring to fig. 3 and 4, the supporting plate 41 is further provided with an auxiliary table 50 for assisting the knife handle 20 to apply a pulling force deviating from the supporting plate 41 to the minimally invasive surgical blade 10. The thickness of the auxiliary table 50 is gradually reduced from one end near the sheath body 30 to the other end, and the auxiliary table 50 is located on one side of the fixing member 40 away from the sheath body 30.

When the minimally invasive surgical blade 10 is used, the bump 21 of the handle 20 is inserted into the mounting hole 15 of the minimally invasive surgical blade 10, then the handle 20 is continuously pushed towards the sleeve body 30, the bump 21 on the handle 20 is in contact with the auxiliary table 50 and moves along with the top surface of the auxiliary table 50 towards the direction far away from the supporting plate 41, and the handle 20 drives the front end of the minimally invasive surgical blade 10 to tilt upwards until the connecting part 14 is removed from the fixing part 40. The auxiliary table 50 is arranged, so that the knife handle 20 does not need to be manually lifted upwards when the minimally invasive surgical blade 10 is taken out, the operation can be completed by means of the gradient of the auxiliary table 50, the operation difficulty of taking out the minimally invasive surgical blade 10 is further reduced, and the operation in a narrow space is facilitated.

Referring to fig. 3 to 11, the inner cavity of the sheath 30 includes a first cavity 60 and a second cavity 70 located on one side of the first cavity 60 away from the fixing member 40 and communicated with the first cavity 60, and the second cavity 70 gradually inclines toward the direction close to the connecting side of the sheath 30 and the fixing member 40 from the connecting end of the first cavity 60 to the other end.

The opening of the first cavity 60 is a wide mouth which is sequentially reduced from outside to inside. A first stop 80 is arranged on a side wall of the first cavity 60 away from the fixing member 40, and the first stop 80 is located in the opening area of the first cavity 60 and is as long as the opening area of the first cavity 60. A first channel 81 for the blade body 11 to pass through is arranged between the first stop 80 and the side wall of the first cavity 60 connected with the fixing member 40, a second channel 82 with an opening facing the first channel 81 and for the knife handle 20 to pass through is arranged on the first stop 80, and a second stop 83 for stopping the blade body 11 from completely entering the first cavity 60 and then being drawn out from the first channel 81 is further arranged on one end of the first stop 80 close to the first channel 81.

When the minimally invasive surgical blade 10 is not in use, the blade body 11 is located within the first cavity 60. When the minimally invasive surgical blade 10 needs to be separated from the knife handle 20 after the minimally invasive surgical blade 10 is used, the minimally invasive surgical knife is inserted into the inner cavity of the sheath 30. The specific operation is as follows:

the relative position of the minimally invasive scalpel and the sheath 30 is adjusted, so that the blade body 11 can be inserted into the first channel 81, the handle 20 can be inserted into the second channel 82, and then the handle 20 is pushed, so that the blade body 11 enters the second cavity 70 (shown in fig. 10) through the first cavity 60 (shown in fig. 9), and after the blade body 11 enters the second cavity 70, the handle 20 passes through an opening region (provided with a first block 80 region) of the first cavity 60 and enters a main body region (communicated with the second cavity 70 and not provided with the first block 80 region) of the first cavity 60. When the blade body 11 enters the body region of the first cavity 60, the handle 20 enters the opening region of the first cavity 60, at this time, a certain included angle is formed between the blade body 11 and the connecting portion 14, the handle 20 tends to incline away from the first channel 81 under the elastic action of the minimally invasive surgical blade 10, but at the same time, the first stopper 80 applies a blocking force towards the first channel 81 to both sides of the connecting portion 14, and the handle 20 and the connecting portion 14 are kept in a vertical state (as shown in fig. 9) because the connecting portion 14 is located on the projection 21 of the handle 20.

Then, when the blade body 11 enters the second cavity 70 and the bump 21 on the handle 20 enters the body area of the first cavity 60, the handle 20 is inclined, the tail of the connecting portion 14 still keeps a vertical state under the action of the first stopper 80, and the tail of the connecting portion 14 and the bump 21 on the handle 20 are separated from each other at a certain included angle. Then the knife handle 20 is pulled backwards (as shown in fig. 11), the minimally invasive surgical blade 10 is driven by the knife handle 20 to move outwards until the tail end of the connecting portion 14 abuts against the second stop 83, then the minimally invasive surgical blade 10 is kept still under the pushing action of the second stop 83, the knife handle 20 continues to move outwards, so that the bump 21 is gradually pulled out from the mounting hole 15 until the knife handle 20 is completely separated from the blade main body 11 and then pulled out from the inner cavity of the sheath 30, and the blade main body 11 is retained in the inner cavity of the sheath 30 under the action of the second stop 83.

Therefore, the minimally invasive surgical blade 10 can be detached by means of the protective sleeve without manual hand breaking, and the operation safety of detaching the blade is greatly improved.

Referring to fig. 6, 7, 10 and 11, a groove 84 for being inserted and matched with the minimally invasive surgical blade 10 is provided on an inner side wall of the second stopper 83, and a length direction of the groove 84 is parallel to a length direction of the first channel 81.

When the knife handle 20 is taken out, the minimally invasive surgical blade 10 is driven by the knife handle 20 to move outwards until the tail end of the connecting part 14 is inserted into the groove 84, so that when the knife handle 20 is pulled outwards, the minimally invasive surgical blade 10 cannot be taken out by the knife handle 20, and the rear end of the minimally invasive surgical blade 10 cannot fall into the first channel 81, so that the knife handle 20 can be quickly and smoothly taken out from the sleeve body 30, and after the knife handle 20 is taken out, the minimally invasive surgical blade 10 cannot fall out from the inner cavity of the sleeve body 30 due to the fact that the opening of the sleeve body 30 is placed downwards, and safety when the protective sleeve is moved is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A minimally invasive surgical blade, comprising:

the blade comprises a blade main body, wherein cutting edges are arranged on two sides of the blade main body, and a through hole which penetrates through the blade main body along the length direction of the blade main body and is used for penetrating a guide wire is arranged in the middle of the blade main body; the tip end of the blade main body is divided into two parts by the through hole; and

2. The minimally invasive surgical blade according to claim 1, wherein: the length direction of the connecting part and the length direction of the blade main body form an obtuse angle.

3. The minimally invasive surgical blade according to claim 1 or 2, wherein: the connecting part is positioned on one side of the through hole.

4. Minimally invasive scalpel, characterized by, includes:

the minimally invasive surgical blade of any one of claims 1 to 3, wherein the connecting portion is provided with a mounting hole; and

the knife handle is provided with a convex block inserted in the mounting hole.

5. Minimally invasive scalpel subassembly, its characterized in that includes:

the minimally invasive surgical blade of any one of claims 1-3; and

6. The minimally invasive surgical knife assembly of claim 5, wherein: the fixing piece comprises a supporting plate connected with the opening end of the sleeve body and a crimping piece arranged on the supporting plate and used for being matched with the supporting plate to clamp the connecting portion tightly, and the crimping piece can deform to loosen the connecting portion when the minimally invasive surgery blade is subjected to pulling force deviating from the supporting plate.

7. The minimally invasive surgical knife assembly of claim 6, wherein: the crimping piece is equipped with two sets ofly and is used for fixing respectively the both ends of connecting portion, every group the crimping piece includes two relative plastics pothooks that set up, and with a set of two the plastics pothook is used for the cooperation to follow the width direction of connecting portion presss from both sides tightly connecting portion.

8. The minimally invasive surgical knife assembly of claim 6, wherein: the supporting plate is also provided with an auxiliary table for assisting the knife handle to apply a pulling force deviating from the supporting plate to the minimally invasive surgical blade; the thickness of the auxiliary table is reduced from one end close to the sleeve body to the other end in sequence, and the auxiliary table is located on one side, away from the sleeve body, of the fixing part.

9. The minimally invasive surgical knife assembly of any one of claims 5-8, wherein: the inner cavity of the sleeve body comprises a first cavity and a second cavity which is positioned on one side of the first cavity far away from the fixing piece and communicated with the first cavity, and the second cavity is gradually inclined towards the direction close to the connecting side of the sleeve body and the fixing piece from the connecting end of the second cavity to the other end of the second cavity;

10. The minimally invasive surgical knife assembly according to claim 9, wherein: a groove used for being matched with the minimally invasive surgical blade in an inserting mode is formed in the inner side wall of the second stop block, and the length direction of the groove is parallel to the length direction of the first channel.