CN116421276A - Surgical knife - Google Patents

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a scalpel. The scalpel includes a handle, a guide, and an adjustment assembly. The cutter handle is provided with a blade which is provided with a cutting edge, and the cutter handle is provided with a splicing hole extending along the length direction of the cutter handle; the guide piece comprises a connecting column and a first guide plate, the connecting column is arranged in the inserting hole in a drawing and inserting mode, the first guide plate is positioned at the end portion of the knife handle and is provided with a first guide edge corresponding to the knife edge, and a gap is reserved between the first guide edge and the knife edge; the adjusting component is arranged between the cutter handle and the guide piece to adjust the width of the gap between the cutting edge and the first guide edge. The method can separate the surface layer with the epithelial connective tissue flap with the set thickness and uniformity so as to obtain the autologous soft tissue graft with a certain thickness.

Description

Surgical knife

Technical Field

The application relates to the technical field of medical instruments, in particular to a surgical knife.

Background

Currently, with the emphasis on gingival aesthetics and the popularization of periodontal implant technology, the demand for oral autologous soft tissue grafts, mainly including free connective tissue grafts and free gingival grafts, is increasing. In a common method for obtaining autologous soft tissue grafts, a 15c blade is used to insert into and submerge into palate tissue with a thickness of about 2-3mm to obtain a superficial epithelial connective tissue flap with a thickness of 1-1.5mm, which can then be completely severed into a free gum graft or a free connective tissue graft can be obtained below the gum graft.

However, the technological sensitivity of the subsurface separation process of the epithelial connective tissue flap on the surface layer is extremely high, mainly in that the thickness and uniformity thereof are difficult to accurately grasp. If the surface layer is provided with a thinner epithelial connective tissue flap or the thickness is uneven for obtaining the free gingival graft, the obtained free gingival graft has poor transplanting effect; if the surface layer is thicker with the epithelial connective tissue flap, the residual tissue of the wound surface of the donor area is thinner, and the postoperative pain and bleeding are obvious. If the epithelial connective tissue graft is obtained, if the epithelial connective tissue flap is thinner with the epithelial perforation even on the surface layer, tissue necrosis easily occurs after the operation, the healing after the operation is affected, and the pain and bleeding after the operation are obvious.

Disclosure of Invention

The primary object of the present application is to provide a scalpel that is capable of separating a superficial epithelial connective tissue flap of a set thickness to obtain an autologous soft tissue graft of a certain thickness.

According to a first aspect of embodiments of the present application, there is provided a surgical knife comprising:

the cutter comprises a cutter handle, wherein a blade is arranged on the cutter handle, the blade is provided with a cutting edge, and a plug hole extending along the length direction of the cutter handle is arranged on the cutter handle;

the guide piece comprises a connecting column and a first guide plate, the connecting column is arranged in the inserting hole in an inserting mode, the first guide plate is located at the end portion of the knife handle and is provided with a first guide edge corresponding to the knife edge, and a gap is reserved between the first guide edge and the knife edge;

the adjusting component is arranged between the cutter handle and the guide piece, so that the width of the gap between the cutting edge and the first guide edge is adjusted.

Further, the adjusting component comprises a regulating part and a sliding part, the regulating part is arranged on the cutter handle, the sliding part is arranged between the regulating part and the first guide plate, and the sliding part can reciprocate along the height direction of the cutter handle under the regulation of the regulating part, so that the width of the gap between the cutting edge and the first guide edge is regulated.

Further, the knife handle is provided with a mounting groove and an avoidance notch, the mounting groove extends along the length direction of the knife handle, and the avoidance notch is arranged on the side edge of the mounting groove and communicated with the mounting groove;

the adjusting and controlling part comprises a rolling part and a stud, the rolling part is arranged in the mounting groove, and the stud penetrates through the avoidance notch and extends along the height direction of the knife handle;

the rolling part rotates in the mounting groove under the action of external force, so that the stud drives the sliding part to reciprocate along the height direction of the tool handle.

Further, a guiding part is further arranged on the tool handle, the guiding part extends along the height direction of the tool handle, a sliding fit part and a threaded hole are arranged on the sliding part, the sliding fit part is matched with the guiding part, and the sliding part is connected with the stud through the threaded hole.

Further, one of the guide part and the sliding fit part is a guide block, and the other one is a sliding fit groove.

Further, a first positioning pin is arranged on the first guide plate, the sliding part comprises a sliding block, a positioning sliding groove is arranged on the sliding block, the positioning sliding groove is obliquely arranged along the width direction of the knife handle, and the positioning pin rotates by taking the connecting column as the center and slides along the positioning sliding groove under the regulation and control of the regulating and controlling part so as to regulate the width of the gap between the cutting edge and the first guide edge.

Further, two positioning sliding grooves are formed, a V-shaped structure is formed by surrounding the two positioning sliding grooves, and the first positioning pin is selectively arranged in one of the two positioning sliding grooves.

Further, a locking assembly is further arranged on the knife handle, and the locking assembly is provided with a locking position for clamping the connecting column in the inserting hole and an unlocking position for separating from the connecting column.

Further, the locking assembly comprises a ball head and an elastic element, and the connecting column is provided with an annular groove matched with the ball head, or the locking assembly comprises a first magnet arranged at the bottom end of the plug hole and a second magnet arranged at one end, close to the plug hole, of the connecting column.

Further, one end of the guide plate, which is close to the blade, is provided with annular scale marks.

Further, a connecting section extending along the length direction of the connecting column is arranged at one end, far away from the plug hole, of the connecting column, the guide piece further comprises a second guide plate, a fixing sleeve is arranged on the second guide plate, and the fixing sleeve is detachably sleeved on the connecting section;

the second guide plate is also provided with a second guide edge and a second positioning pin, the second positioning pin is arranged in the other one of the two positioning sliding grooves, and the first guide edge and the second guide edge are symmetrically arranged on two sides of the blade.

Compared with the prior art, the technical scheme of the application has at least the following technical effects:

the tip of the handle of a knife of this application is provided with first baffle, and this first baffle have with the corresponding first leading edge of cutting edge, have the clearance between this first leading edge and the blade. In the process of obtaining the free connective tissue implant, the first guide plate is closely attached to gingival epithelium, and when the blade walks in palate tissue, the thickness of the separated surface layer epithelial connective tissue part is always equal to the width of a gap between the first guide edge and the blade, so that the surface layer epithelial connective tissue valve with set thickness and uniformity can be separated. In addition, owing to be provided with adjusting part between handle of a knife and guide, can utilize adjusting part to adjust the width in clearance between handle of a knife and the guide according to actual need, reduce the wound as far as possible when satisfying the operation needs, ensure postoperative healing.

That is, this application is through setting up the clearance between first leading edge and blade, sets up adjusting part between handle of a knife and guide simultaneously, when utilizing the scalpel in this application to acquire free connective tissue graft, can guarantee that the thickness of separated surface layer area epithelial connective tissue lamella is equal to the width of the clearance between first leading edge and the cutting edge that sets for all the time, and then can separate the surface layer area epithelial connective tissue lamella of thickness, even unanimity, simple structure, convenient operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic view of a surgical knife (with the second guide plate removed) according to an embodiment of the present application;

FIG. 2 is a schematic view of a tool shank according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a first guide plate and a connecting post portion according to one embodiment of the present disclosure;

FIG. 4 is a schematic view of a first guide plate and a portion of a connecting post (with connecting segments removed) as disclosed in another embodiment of the present application;

fig. 5 is a schematic structural view of a sliding portion disclosed in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a regulating part disclosed in an embodiment of the present application;

FIG. 7 is a perspective view of region A of FIG. 1;

FIG. 8 is a schematic view of a second guide plate according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of the structure of the scalpel (plus a second guide plate) disclosed in an embodiment of the present application;

fig. 10 is a view in the direction B in fig. 9.

Wherein the above figures include the following reference numerals:

10. a knife handle; 11. a blade; 111. a blade edge; 12. a mounting groove; 13. avoiding the notch; 14. a guide part; 15. a plug hole; 16. a support groove; 20. a guide member; 21. a connecting column; 211. an annular groove; 212. a second magnet; 213. a connection section; 22. a first guide plate; 220. a first guide edge; 221. a first positioning pin; 222. annular graduation marks; 23. a second guide plate; 231. a fixed sleeve; 232. a second guide edge; 233. a second positioning pin; 30. a regulating part; 31. a rolling part; 32. a stud; 40. a sliding part; 41. a sliding fit portion; 42. a threaded hole; 43. a sliding block; 431. positioning a chute; 51. ball head; 52. an elastic element.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 7, according to an embodiment of the present application, there is provided a surgical knife including a handle 10, a guide 20, and an adjustment assembly. Wherein, the knife handle 10 is provided with a blade 11, the blade 11 is provided with a blade edge 111, and the knife handle 10 is provided with a splicing hole 15 extending along the length direction of the knife handle 10; the guide piece 20 comprises a connecting column 21 and a first guide plate 22, the connecting column 21 is arranged in the inserting hole in a drawing way, the first guide plate 22 is positioned at the end part of the knife handle 10, the first guide plate 22 is provided with a first guide edge 220 corresponding to the knife edge 111, and a gap is reserved between the first guide edge 220 and the knife edge 111; an adjustment assembly is provided between the shank 10 and the guide 20 to adjust the width of the gap between the cutting edge 111 and the first guide edge 220.

In this application, the end of the shank 10 is provided with a first guide plate 22, and the first guide plate 22 has a first guide edge 220 corresponding to the blade edge 111, with a gap between the first guide edge 220 and the blade edge 111. In the process of obtaining the free connective tissue implant by using the scalpel in the application, the first guide plate 22 is tightly attached to the gingival epithelium, and when the blade 11 walks in the palate tissue (namely, cuts and separates the palate tissue), the thickness of the separated surface layer epithelial connective tissue flap is always equal to the width of the gap between the first guide edge 220 and the blade 11, so that the autologous soft tissue implant with a certain thickness is obtained. In addition, since the adjusting assembly is provided between the tool shank 10 and the guide 20, the width of the gap between the tool shank 10 and the guide 20 can be adjusted by using the adjusting assembly according to actual needs.

That is, the present application sets up the clearance through setting up between first leading edge 220 and cutting edge 111, sets up adjusting part simultaneously between handle of a knife 10 and guide 20, when utilizing the scalpel in this application to obtain free connective tissue graft, can separate the superficial layer area epithelium connective tissue lamella of setting for thickness, even unanimity, simple structure, convenient operation.

Specifically, the adjusting assembly includes a adjusting portion 30 and a sliding portion 40, the adjusting portion 30 is disposed on the tool holder 10, the sliding portion 40 is disposed between the adjusting portion 30 and the first guide plate 22, and the sliding portion 40 can reciprocate along the height direction of the tool holder 10 under the adjustment of the adjusting portion 30, so as to adjust the width of the gap between the cutting edge 111 and the first guide edge 220. That is, in the present application, by setting the adjusting component to the adjusting part 30 and the sliding part 40, in the actual use process, under the adjustment of the adjusting part 30, the sliding part 40 can reciprocate along the height direction (as shown by the arrow direction in fig. 2) of the tool handle 10, so as to adjust the width of the gap between the cutting edge 111 and the first guiding edge 220, which is simple to operate and convenient to implement.

Specifically, as shown in fig. 2 and 6, the tool shank 10 is provided with a mounting groove 12 and a relief notch 13, the mounting groove 12 extends along the length direction of the tool shank 10, and the relief notch 13 is disposed on a side edge of the mounting groove 12 and is communicated with the mounting groove 12; the regulating and controlling part 30 comprises a rolling part 31 and a stud 32, wherein the rolling part 31 is arranged in the mounting groove 12, and the stud 32 passes through the avoidance gap 13 and extends along the height direction of the knife handle 10; the rolling part 31 rotates in the mounting groove 12 under the action of external force, so that the stud 32 drives the sliding part 40 to reciprocate along the height direction of the tool handle 10.

Through setting up mounting groove 12 on handle of a knife 10, the rolling part 31 of being more convenient for is installed on handle of a knife 10, will dodge breach 13 intercommunication setting simultaneously in the side of mounting groove 12, when rolling part 31 installs in mounting groove 12, and stud 32 just can pass dodge breach 13 and extend along the direction of height of handle of a knife 10. In this way, in the actual adjusting process, the rolling portion 31 is subjected to an external force, for example, the operator rolls the rolling portion 31 by hand, and the stud 32 can drive the sliding portion 40 to reciprocate along the height direction of the tool shank 10. Alternatively, the rolling portion 31 may be a roller structure; of course, the control 30 may be provided as a knob screw.

Specifically, the tool shank 10 is further provided with a guide portion 14, the guide portion 14 extends along the height direction of the tool shank 10, the sliding portion 40 is provided with a sliding fit portion 41 and a threaded hole 42, the sliding fit portion 41 is matched with the guide portion 14, and the sliding portion 40 is connected with the stud 32 through the threaded hole 42. When the rolling part 31 is rolled, the stud 32 rotates in the threaded hole 42, and the sliding fit part 41 is matched with the guide part 14, so that the stud 32 can drive the sliding part 40 to reciprocate along the height direction of the tool handle 10 in the process, and the structure is simple and convenient to realize. Note that, the height directions in this application are all directions of arrows in fig. 2.

Further, one of the guide portion 14 and the sliding engagement portion 41 is a guide block, and the other is a sliding engagement groove. That is, when the guide portion 14 is provided as a guide block, the slip fit portion 41 is provided as a slip fit groove; when the guide portion 14 is provided as a sliding fit groove, the sliding fit portion 41 is provided as a guide block, and the structure is simple and easy to realize. In a specific embodiment of the present application, the guide portion 14 is provided as a guide block, and the sliding fit portion 41 is provided as a sliding fit groove.

Optionally, the guide block in this example is square guide block, and the slip fit groove is slip fit recess, so sets up, simple structure, and processing is convenient, and when square guide block and slip fit recess mutually supported, the area of contact between the two is increased simultaneously, improves the installation steadiness between handle of a knife 10 and the sliding part 40 greatly for when sliding part 40 carries out reciprocating motion along handle of a knife 10 direction of height, sliding part 40 can not take off easily. Of course, in other embodiments of the present application, the guide block may be configured as a cylindrical guide block or other special-shaped block, and the sliding fit groove is configured as a sliding fit arc groove, which is within the scope of the present application as long as the sliding fit arc groove is under the concept of the present application.

Specifically, referring to fig. 3 and 4, the first guide plate 22 is provided with a first positioning pin 221, the sliding portion 40 includes a sliding block 43, the sliding block 43 is provided with a positioning chute 431, the positioning chute 431 is obliquely disposed along the height direction of the tool shank 10, and the first positioning pin 221 rotates centering on the connection post 21 and slides along the positioning chute 431 under the control of the control portion 30 to adjust the height of the gap between the blade edge 111 and the first guide edge 220.

In the actual adjusting process, when the sliding portion 40 reciprocates along the height direction of the tool shank 10, at this time, the first positioning pin 221 can be driven to rotate around the connecting post 21 and slide along the positioning chute 431, and the positioning chute 431 is obliquely arranged along the height direction of the tool shank 10, so that the first positioning pin 221 slides along the inclined plane of the positioning chute 431 in the sliding process, and the angle between the first guide plate 22 and the blade 11 can be adjusted, thereby changing the width of the gap between the blade edge 111 and the first guide edge 220. That is, in the actual adjustment process, the angle between the first guide plate 22 and the blade 11 is adjusted, so as to adjust the width of the gap between the blade edge 111 and the first guide edge 220.

Further, as shown in fig. 5, there are two positioning sliding grooves 431, and the two positioning sliding grooves 431 are surrounded to form a V-shaped structure, and the first positioning pin 221 is selectively disposed in one of the two positioning sliding grooves 431. Since the cutting is required in both directions during the procedure for harvesting free connective tissue grafts in the mouth of a person, the blade 11 used is typically a 15c blade, such blade 11 being a single-sided blade. When the cutting direction needs to be changed, the connecting column 21 is only required to be pulled out from the inserting hole 15, then the connecting column 21 is rotated to the other side, the first positioning pin 221 is inserted into the positioning sliding groove 431 at the other side of the sliding block 43, and the connecting column 21 is not required to be pulled out from the inserting hole 15 in the pulling process, so long as the connecting column 21 is guaranteed to rotate to the other side. During this process, the position of the slider 43 is kept still, and the width of the gap between the blade edge 111 and the first guide edge 220 rotated to the other side is still consistent with the previous set value. That is, when the cutting direction needs to be turned, the first guide plate 22 can be quickly placed on the other side of the blade 11 with equal gaps between the first guide plate and the first guide plate without the need of adjusting and controlling the adjusting and controlling part 30, so that the double-side cutting function of the epithelial connective tissue flap is realized, and the structure is simple and the operation is convenient.

Alternatively, in actual design, the slip fit groove is located between two positioning runners 431.

Optionally, referring to fig. 2 again, the handle 10 is further provided with a support groove 16, where the support groove 16 is used to support the sliding portion 40, and in actual installation, the sliding portion 40 can be supported by placing the end of the sliding block 43 away from the sliding fit groove in the support groove 16, so that the installation stability between the handle 10 and the sliding portion 40 is further improved, and the structure is simple and convenient to implement.

Specifically, the handle 10 is further provided with a locking assembly having a locking position for locking the connection post 21 in the insertion hole 15 and an unlocking position for releasing the connection post 21. So arranged, when the connecting column 21 is positioned in the inserting hole 15, the locking component locks the inserting hole 15 so that the connecting column 21 is fixed in the inserting hole 15, and the connecting column cannot fall off from the inserting hole 15 when being cut by a scalpel; when the connecting column 21 is required to be pulled out during cutting in the turning direction, the locking assembly unlocks the connecting column 21, so that the connecting column 21 is separated from the locking assembly, and the next operation can be performed.

Further, as shown in fig. 3, 4 and 7, the locking assembly includes a ball head 51 and an elastic element 52, and the connecting post 21 is provided with an annular groove 211 adapted to the ball head 51, or the locking assembly includes a first magnet (not shown) disposed at the bottom end of the socket 15 and a second magnet 212 disposed at one end of the connecting post 21 near the socket, which is simple in structure and convenient to implement. Alternatively, the ball 51 in this embodiment may be a steel ball, and the elastic element 52 may be provided with a spring or a spring plate. The first magnet and the second magnet 212 may be, for example, magnets made of a high temperature resistant material.

Specifically, the first guide plate 22 is provided with an annular graduation mark 222 at an end thereof near the blade 11. By arranging the annular scale mark 222 at one end of the first guide plate 22 close to the blade, the width of the separated surface layer connective tissue flap with epithelium can be conveniently and real-time measured, on one hand, a user can clearly determine whether the width of the tissue to be taken meets the requirement to realize accurate operation, and on the other hand, the blade 11 can be prevented from damaging important blood vessels and nerves in the palate tissue during submerged separation. Optionally, the shape of the first guide edge 220 of the first guide 22 conforms to the shape of the blade edge 111, which in this embodiment is arcuate, so that the location of the blade 11 within the palate tissue can be more readily understood by the first guide 22.

Pedicel connective tissue valves are often used in cases where soft tissue is insufficient adjacent to the surgical site and the surgical site cannot be tightly sutured. In the current method for obtaining the connective tissue flap with pedicel, the soft tissue flap which is turned up and has a certain mobility and has a thickness of only 2-3mm is divided into two parts (the surface layer with the epithelium is used for covering the wound surface of a donor area, the connective tissue flap with pedicel below is shifted to a receiver area), and in the process, one hand is required to clamp the soft tissue flap by forceps to fix the soft tissue flap, and meanwhile, the soft tissue flap is cut by a surgical knife; during cutting, the operator needs to observe not only the tissue thickness on both sides, but also the forceps holding portion to move following the travel of the blade 11. The method has great difficulty in intraoral operation and high technical sensitivity, and the operation effect can be influenced by the thin thickness and even perforation of the surface layer connective tissue flap with the epithelium and the pedicle connective tissue flap.

As shown in fig. 3 and 8 to 10, one end of the connecting post 21 away from the plugging hole 15 is provided with a connecting section 213 extending along the length direction of the connecting post 21, the guide member 20 further comprises a second guide plate 23, the second guide plate 23 is provided with a fixing sleeve 231, and the fixing sleeve 231 is detachably sleeved on the connecting section 213;

the second guide plate 23 is further provided with a second guide edge 232 and a second positioning pin 233, the second positioning pin 233 is arranged in the other of the two positioning sliding grooves 431, and the first guide edge 220 and the second guide edge 232 are symmetrically arranged on two sides of the blade 11. By clamping the first guide plate 22 and the second guide plate 23 on both sides of the blade 11, the tissue flap with mobility which is turned up in the oral cavity can be evenly and uniformly divided into the connective tissue flap with epithelium and the connective tissue flap with pedicle below. Compared with the prior art, when the surgical knife is operated, the tissue flap is clamped by the forceps by one hand, and meanwhile, the surgical knife is cut by the surgical knife, and the surgical knife is easy to operate in the mouth, so that the operation difficulty is greatly reduced.

Optionally, the connecting section 213 and the fixing sleeve 231 are detachably and fixedly connected through a magnetic attraction assembly or a buckle assembly, and the structure is simple and the installation is convenient.

Alternatively, the connection section 213 and the connection post 21 are integrally formed, which can improve the structural strength and the use stability of the connection post 21.

From the above description, it can be known that:

by adopting the scalpel, firstly, the connecting column 21 is inserted into the inserting hole 15 and the first locating pin 221 is arranged in one of the locating slide grooves 431, secondly, the stud 32 is rotated in the threaded hole 42 by the rolling part 31, the stud 32 can drive the sliding part 40 to reciprocate along the height direction of the handle 10, and then the first locating pin 221 is driven to slide along the inclined plane of the locating slide groove 431, so that the angle between the first guide plate 22 and the blade 11 can be adjusted according to actual needs, and the width of the gap between the cutting edge 111 and the first guide edge 220 can be adjusted. In this way, the thickness of the separated superficial epithelial connective tissue flap is always equal to the width of the gap between the first guiding edge 220 and the cutting edge 111.

When the cutting direction needs to be changed, the connecting column 21 is slightly extracted from the insertion hole 15, then the connecting column 21 is rotated to the other side, and the first positioning pin 221 is inserted into the positioning sliding groove 431 at the other side of the sliding block 43, so that the double-sided cutting of the epithelial connective tissue flap can be performed.

In addition, the scalpel is further provided with a second guide plate 23, so that soft tissue petals with mobility which are turned up in the oral cavity can be evenly and evenly divided into two layers (the surface layer is provided with an epithelial connective tissue petal and the lower connective tissue petal with a pedicle). Since the spacing between the first 22 and second 23 guide plates is adjustable, soft tissue flaps of different patients can be accommodated. And because the clamping of the first guide plate 22 and the second guide plate 23 at two sides of the blade 11 always ensures that the thickness of the separated two layers of tissues is uniform and consistent in the cutting process, the conditions of uneven thickness and perforation are effectively avoided, the operation process is simplified, and the operation time is shortened.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (11)

1. A surgical knife, comprising:

the cutting tool comprises a tool handle (10), wherein a blade (11) is arranged on the tool handle (10), the blade (11) is provided with a cutting edge (111), and a plug hole (15) extending along the length direction of the tool handle (10) is arranged on the tool handle (10);

the guide piece (20), the guide piece (20) comprises a connecting column (21) and a first guide plate (22), the connecting column (21) is arranged in the inserting hole (15) in a drawing way, the first guide plate (22) is positioned at the end part of the knife handle (10), the first guide plate (22) is provided with a first guide edge (220) corresponding to the knife edge (111), and a gap is reserved between the first guide edge (220) and the knife edge (111);

and the adjusting assembly is arranged between the cutter handle (10) and the guide piece (20) so as to adjust the width of the gap between the cutting edge (111) and the first guide edge (220).

2. The scalpel according to claim 1, wherein the adjusting assembly comprises an adjusting portion (30) and a sliding portion (40), the adjusting portion (30) is disposed on the handle (10), the sliding portion (40) is disposed between the adjusting portion (30) and the first guide plate (22), and the sliding portion (40) can reciprocate along the height direction of the handle (10) under the adjustment of the adjusting portion (30), so as to adjust the width of the gap between the blade edge (111) and the first guide edge (220).

3. The scalpel according to claim 2, wherein a mounting groove (12) and an avoidance notch (13) are arranged on the scalpel handle (10), the mounting groove (12) extends along the length direction of the scalpel handle (10), and the avoidance notch (13) is arranged on the side edge of the mounting groove (12) and is communicated with the mounting groove (12);

the adjusting and controlling part (30) comprises a rolling part (31) and a stud (32), the rolling part (31) is arranged in the mounting groove (12), and the stud (32) passes through the avoidance gap (13) and extends along the height direction of the knife handle (10);

the rolling part (31) rotates in the mounting groove (12) under the action of external force, so that the stud (32) drives the sliding part (40) to reciprocate along the height direction of the tool handle (10).

4. A scalpel according to claim 3, wherein the handle (10) is further provided with a guide portion (14), the guide portion (14) extends along the height direction of the handle (10), the sliding portion (40) is provided with a sliding fit portion (41) and a threaded hole (42), the sliding fit portion (41) is adapted to the guide portion (14), and the sliding portion (40) is connected with the stud (32) through the threaded hole (42).

5. The scalpel according to claim 4, wherein one of the guide portion (14) and the sliding engagement portion (41) is a guide block, and the other is a sliding engagement groove.

6. The scalpel according to claim 2, wherein a first positioning pin (221) is provided on the first guide plate (22), the sliding portion (40) includes a sliding block (43), a positioning slide groove (431) is provided on the sliding block (43), the positioning slide groove (431) is obliquely provided along the width direction of the handle (10), and the first positioning pin (221) rotates around the connecting post (21) and slides along the positioning slide groove (431) under the control of the control portion (30) to adjust the width of the gap between the blade edge (111) and the first guide edge (220).

7. The scalpel according to claim 6, wherein the number of the positioning sliding grooves (431) is two, the two positioning sliding grooves (431) are surrounded to form a V-shaped structure, and the first positioning pin (221) is selectively arranged in one of the two positioning sliding grooves (431).

8. The scalpel according to any one of claims 1 to 7, wherein a locking assembly is further provided on the handle (10), the locking assembly having a locking position for snapping the connecting post (21) into the insertion hole (15) and an unlocking position for disengaging the connecting post (21).

9. The scalpel according to claim 8, wherein the locking assembly comprises a ball head (51) and an elastic element (52), the connecting column (21) is provided with an annular groove (211) matched with the ball head (51), or,

the locking assembly comprises a first magnet arranged at the bottom end of the plug hole (15) and a second magnet (212) arranged at one end, close to the plug hole (15), of the connecting column (21).

10. The scalpel according to any one of claims 1 to 7, wherein the first guide plate (22) is provided with an annular graduation mark (222) at an end thereof adjacent to the blade (11).

11. The scalpel according to claim 7, wherein an end of the connecting post (21) away from the insertion hole (15) is provided with a connecting section (213) extending in a length direction of the connecting post (21), the guide member (20) further comprises a second guide plate (23), a fixing sleeve (231) is provided on the second guide plate (23), and the fixing sleeve (231) is detachably sleeved on the connecting section (213);

the second guide plate (23) is further provided with a second guide edge (232) and a second positioning pin (233), the second positioning pin (233) is arranged in the other one of the two positioning sliding grooves (431), and the first guide edge (220) and the second guide edge (232) are symmetrically arranged on two sides of the blade (11).

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