Labor-saving endoscope scissors and manufacturing method thereof
阅读说明:本技术 一种省力的腔镜剪刀及其制造方法 (Labor-saving endoscope scissors and manufacturing method thereof ) 是由 叶宗鉴 于 2020-06-08 设计创作,主要内容包括:本发明涉及一种省力的腔镜剪刀包含第一刀片和第二刀片,其中所述第一刀片包含第一近端驱动部分和第一刀片体及连接其的第一安装部分;所述第二刀片包含第二近端驱动部分和第二刀片体及连接其的第二安装部分,所述第一刀片体包含第一刀尖、第一刃口面、第一配合面、第一过渡面、第一外侧面和第一磨刃面,所述第一磨刃面与第一配合面相交形成第一磨削刃,所述第一磨刃面与所述第一刃口面相交形成第一过渡刃;所述第一配合面,第一刃口面和第一磨刃面限定出第一刃部;所述第一配合面和第一外侧面限定出第一本体;所述第一刃部的厚度显著的小于所述第一本体。(The invention relates to a labor-saving cavity mirror scissors which comprises a first blade and a second blade, wherein the first blade comprises a first proximal end driving part, a first blade body and a first mounting part connected with the first proximal end driving part and the first blade body; the second blade comprises a second proximal drive portion and a second blade body and a second mounting portion connected thereto, the first blade body comprises a first blade tip, a first blade edge face, a first mating face, a first transition face, a first outer side face and a first ground edge face, the first ground edge face intersects the first mating face to form a first ground edge, and the first ground edge face intersects the first cutting edge face to form a first transition edge; the first matching surface, the first cutting edge surface and the first sharpening surface define a first cutting edge; the first matching surface and the first outer side surface define a first body; the thickness of the first blade is significantly less than the first body.)
1. A labor-saving endoscopic scissors comprises a first blade and a second blade, wherein the first blade comprises a first proximal end driving part, a first blade body and a first mounting part connected with the first proximal end driving part and the first blade body; the second blade comprises a second proximal driving portion and a second blade body and a second mounting portion connected thereto, characterized in that:
1) the first blade body comprises a first blade tip, a first blade edge surface, a first matching surface, a first transition surface, a first outer side surface and a first blade grinding surface, the first blade grinding surface is intersected with the first matching surface to form a first grinding edge, and the first blade grinding surface is intersected with the first blade edge surface to form a first transition edge;
2) the first matching surface, the first cutting edge surface and the first sharpening surface define a first cutting edge; the first matching surface and the first outer side surface define a first body; the thickness of the first blade is significantly less than the first body.
2. The scissors of claim 1, wherein the first body has a thickness dimension H1, the first blade has a thickness dimension H2, wherein H2 is 0.5 x H1; the first blade is integrally molded by adopting a metal powder injection process.
3. The scissors of claim 2 wherein the first blade further comprises a rib extending laterally outward from adjacent the first transition edge to intersect the first transition surface and the first outer side surface.
4. The scissors of claim 3 wherein the reinforcing rib increases in height and width as it extends laterally outwardly from adjacent the first transition edge, the reinforcing rib being wedge-shaped; the reinforcing ribs are arranged in the shape that when the scissors are folded for shearing, the reinforcing ribs do not increase the shearing resistance obviously.
5. The scissors of claim 4 wherein the maximum width dimension of the ribs is B1 and the distance between two adjacent ribs is B2, wherein B2 > B1; the ratio of B2 to B1 can be determined according to the thickness value of the first edge part and the strength test of the first edge part, and the larger the B2, the better the strength of the first edge part is ensured.
6. The scissors of claim 5 wherein, in any cross section substantially perpendicular to the first blade, the first blade has a transverse width L1, the first blade has a transverse width L2, wherein L2 is 0.25L 1; the ratio of L2 to L1 can be determined according to the thickness of the first edge and the strength test thereof, and the larger the L2, the better the strength of the first edge is ensured.
7. The scissors of claim 6 wherein the tip and its adjacent regions are free of ribs and the thickness of the tip region is substantially less than the thickness of the remainder of the blade body.
8. The scissors of claim 7, wherein the first grinding edge has a length dimension LG1, and the distance between the most distal end of the reinforcing rib and the tip has a length dimension LG2, 0.15LG1 ≦ LG2 ≦ 0.33LG 1.
9. The method of manufacturing scissors according to claim 2, comprising the steps of:
s1: powder injection
S2: grinding the first grinding surface without damaging the anti-slip groove
S3: assembling, packaging and sterilizing.
Technical Field
The invention relates to a minimally invasive surgical instrument, in particular to a labor-saving endoscopic scissors and a manufacturing method thereof.
Background
Surgical instruments have been used for hundreds of years, and doctors in surgery use different surgical instruments to complete the operations of tissue grasping, shearing, separating, blood coagulation, suture closing and the like, and the surgical instruments have matured after hundreds of years of development. Endoscopic surgery has been clinically developed for over 30 years and is progressing rapidly. In brief, endoscopic surgery (including laparoscopic surgery and fiberscope surgery), i.e., surgeons, uses elongated endoscopic hand-held instruments to enter a patient through a natural orifice or a constructed puncture channel to complete tissue grasping, cutting, separating, coagulating, suturing, closing and other operations.
Laparoscopic surgery has the major advantages over traditional open surgery in terms of reduced trauma and pain and accelerated recovery. In endoscopic surgery, a doctor usually can only touch internal organs of a patient by means of instruments and cannot directly sense the internal organs by hands. In addition, the visual field of the endoscopic surgery doctor is severely limited, and the local area of the working head of the instrument can be observed only by means of an endoscope and an image system. Because the field of vision of a doctor in the endoscopic surgery is limited and the doctor lacks of tactile feedback, the endoscope hand-held instrument (endoscopic scissors, endoscopic graspers, endoscopic separating forceps and the like) has high requirements on the aspects of accuracy, consistency, controllability and the like. So far, various performances of the endoscope hand-held instrument have various problems, and the requirements of continuously improving the skill of the endoscope operation and continuously developing new kinds of endoscope operations cannot be met.
Disclosure of Invention
Accordingly, to address the problems of the prior art, in one aspect of the present invention, a power saving laparoscopic scissors is presented comprising a first blade and a second blade, wherein the first blade comprises a first proximal drive portion and a first blade body and a first mounting portion connected thereto; the second blade comprises a second proximal drive portion and a second blade body and a second mounting portion connected thereto, the first blade body comprises a first blade tip, a first blade edge face, a first mating face, a first transition face, a first outer side face and a first ground edge face, the first ground edge face intersects the first mating face to form a first ground edge, and the first ground edge face intersects the first cutting edge face to form a first transition edge; the first matching surface, the first cutting edge surface and the first sharpening surface define a first cutting edge; the first matching surface and the first outer side surface define a first body; the thickness of the first blade is significantly less than the first body.
In a preferred embodiment, the thickness dimension of the first body is H1, and the thickness dimension of the first blade is H2, wherein H2 is not more than 0.5 × H1; the first blade is integrally molded by adopting a metal powder injection process.
In a preferred aspect, the first blade further comprises a stiffener extending laterally outward from adjacent the first transition edge to intersect the first transition surface and the first outer side surface.
In a preferred embodiment, the reinforcing bar has a gradually increasing height and width as it extends laterally outward from the vicinity of the first transition edge, and the reinforcing bar has a wedge shape; the reinforcing ribs are arranged in the shape that when the scissors are folded for shearing, the reinforcing ribs do not increase the shearing resistance obviously.
In a preferred embodiment, the maximum width dimension of the reinforcing rib is B1, and the distance between two adjacent reinforcing ribs is B2, wherein B2 > B1; the ratio of B2 to B1 can be determined according to the thickness value of the first edge part and the strength test of the first edge part, and the larger the B2, the better the strength of the first edge part is ensured.
In a preferable scheme, the transverse width of the first blade body is L1 and the transverse width of the first blade body is L2 in any section approximately perpendicular to the first blade body, wherein L2 is more than or equal to 0.25L 1; the ratio of L2 to L1 can be determined according to the thickness of the first edge and the strength test thereof, and the larger the L2, the better the strength of the first edge is ensured.
In a preferred embodiment, the tip and its adjacent area are not provided with reinforcing ribs, and the thickness of the tip area is significantly smaller than the thickness of other parts of the blade body.
In a preferred embodiment, the first grinding edge has a length dimension of LG1, and the distance between the farthest end of the reinforcing bar and the tool nose has a length dimension of LG2, 0.15LG1 ≤ LG2 ≤ 0.33LG 1.
A preferred embodiment comprises the following steps:
s1: powder injection
S2: grinding the first grinding surface without damaging the anti-slip groove
S3: assembling, packaging and sterilizing.
Drawings
For a fuller understanding of the nature of the present invention, reference should be made to the following detailed description taken together with the accompanying figures in which:
FIG. 1 is a typical endoscopic hand piece 10;
FIG. 2 is an exploded view of the head assembly 40 shown in FIG. 1;
fig. 3 is a schematic side view of a hollow tube 400;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of a pull rod 500;
FIG. 6 is a schematic view of a drive component 350;
FIG. 7 is a schematic projection view of the drive component 350;
FIG. 8 is a perspective view of the head assembly 40;
fig. 9 is a perspective view of a modified
FIG. 10 is a projection view of the
FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10;
FIG. 12 is a cross-sectional view taken at 12-12 of FIG. 10;
FIG. 13 is a cross-sectional view of 13-13 of FIG. 10;
FIG. 14 is a perspective view of the head assembly 40 a;
FIG. 15 is a perspective view of the closed state of the head assembly 40 a;
FIG. 16 is a perspective view of a further modified first blade 100 b;
FIG. 17 is a schematic view of a small opening angle of head assembly 40 b;
FIG. 18 is a schematic view of the closed state of the head assembly 40 b;
FIG. 19 is a perspective view of yet another modified
FIG. 20 is a projection view of the first blade 100C;
FIG. 21 is a cross-sectional view 21-21 of FIG. 20;
FIG. 22 is a schematic view of a small opening angle of
FIG. 23 is a schematic view of the closed state of the
Like reference numerals refer to like parts or components throughout the several views.
Detailed Description
Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, the disclosure herein is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to employ the present invention.
Referring to fig. 1, for convenience, the side next to the operator is defined as the proximal side, and the side further away from the operator is defined as the distal side.
In performing laparoscopic surgery, a piercing cannula assembly (not shown) is typically used to establish surgical access to and from a patient's body wall through which various minimally invasive surgical instruments, such as hand-held instrument 10, may be inserted into a body cavity. One or more cannula assemblies may be used simultaneously during a surgical procedure, and surgical handpiece 10 may be configured to operate simultaneously with one or more other cannula assemblies depending on the surgical needs.
FIG. 1 depicts a typical endoscopic hand piece 10 comprising a proximal handle 20, a distal head assembly 40, and an elongated shaft 30 extending therebetween. The handle 20 includes a front grip 21, a rear grip 22 and a handle rotation shaft 23 connected thereto, and the front grip 21 and the rear grip 22 are rotatably movable with respect to the handle rotation shaft 23. The elongated rod portion 30 includes an axis 31, a runner 35, an
Fig. 2-4 illustrate the structure, composition and functional relationship of the head assembly 40 in more detail. The
With continued reference to fig. 3-4, wherein the
It will be appreciated by those skilled in the art that laparoscopic surgical instruments generally fall into three broad categories, laparoscopic scissors, laparoscopic separation forceps and laparoscopic graspers, depending on the shape and function of the head. In one aspect of the present invention, a pair of endoscopic scissors 10 has a
Referring now to fig. 4-5, in one particular implementation the
The
Referring now to fig. 6-8, in yet another modified design, the
Referring now to FIG. 8, when the instrument 10 is used to cut or separate tissue within a patient's body, the anti-slip region 160 (and or the anti-slip region 260) generally makes direct contact with the tissue, increasing the frictional resistance between the tissue and the blade, preventing slippage during cutting/separating of the tissue, and achieving precise cutting/separation. The anti-skid function of the anti-skid area is very important because the vision of surgeons is limited and the tactile feedback is lacked in the endoscopic surgery, and most surgeons prefer endoscopic scissors with an anti-skid function. However, there is no single-use endoscopic scissors with respect to the anti-slip structure of the present invention in the technical documents disclosed so far. Disposable endoscopic scissors, which have been commercialized, mass-produced, sold and used, do not include the anti-slip structure of the present invention.
In one aspect of the invention, a sheet metal manufacturing method of disposable cavity mirror scissors is provided, which comprises the following steps:
s1: forming a metal plate, namely manufacturing a first (second) blade by using a stainless steel plate with proper thickness and a metal plate stamping die;
s2: a grinding edge grinding the first (second) insert to form a first (first) grinding surface and a first (second) grinding edge;
s3: processing the anti-skid area, and manufacturing a first (second) tooth root groove by adopting a grinding or cutting mode;
s4: deburring, namely performing chamfer deburring treatment on all corners formed by processing the tooth root groove;
s5: the device 10 is assembled, then packaged and sterilized.
The anti-skid area is processed by adopting the sheet metal manufacturing method, so that the processing efficiency is lower, and the processing cost is higher; and the first (second) tooth root groove is processed to form more sharp edges, so that the deburring cost is higher, the production cost of the disposable endoscope scissors is greatly improved, and the disposable endoscope scissors are not suitable for mass production.
In another aspect of the invention, an improved method of making a disposable laparoscopic scissors is provided, comprising the steps of:
s1: molding: forming (subsequently abbreviated as MIM) a first (second) blade comprising a first (second) non-slip region using a metal powder injection molding process;
s2: grinding: grinding the first (second) insert to form a first (second) grinding face and a first (second) grinding edge;
s3: deburring, namely deburring the joint corner of the first (second) grinding tool face and the first (second) tooth root groove formed by grinding;
s4: the instrument 10 is assembled and the package sterilized.
Adopt the aforesaid MIM method to make disposable chamber mirror scissors who contains anti-skidding district, because powder injection moulding's first (second) blade has contained anti-skidding district (tooth root groove) in advance, can produce great vibrations (undulant) during the grinding cutting edge, seriously influence the sharpness of cutting edge, and produce a large amount of burrs between the limit of first (second) grinding face and first (second) tooth root groove handing-over, the cost of burring is higher, its overall production cost is still higher, is not suitable for mass production.
Fig. 9-13 depict yet another embodiment of the invention, laparoscopic scissors 11. The scissors 11 are similar in structure and composition to the instrument 10 (note that the same parts of the scissors 11 as the instrument 10 are not shown in the subsequent figures, and the same reference numerals are used for the same parts or components in the subsequent description and the drawings of the description).
The scissors 11 comprise a handle 20, a distal head assembly 40a, and an elongated shaft 30. The head assembly 40a includes a
Referring now to fig. 9-10, in one design, the first blade body 140a includes a
Referring now to FIGS. 10-11, the
In conjunction with the foregoing, when the handle 20 of the cavity mirror scissors 10 is operated so that the
In order to solve the defects of chipping, rolling, bending and the like, in another preferred embodiment, the
Fig. 14 depicts a common mode of use of the scissors 11, i.e., the pair of blades of the scissors 11 are opened to a maximum angle for cutting thicker tissue, or called a re-cutting mode. In this re-shearing mode, when the pair of shear blades close and shear the crushed tissue, the shear blades and their cutting edges generate a large pushing force from the proximal end to the distal end to the tissue. Fig. 15 depicts another common mode of use of the scissors 11, namely, a pair of blades of the scissors 11 fully mated for blunt dissection, or tissue electrocoagulation or high efficiency electrotomy, otherwise known as an electrotomy mode. Particularly for tissue electrocoagulation or high-efficiency electrotomy, the point of the scissors 11 and its adjacent area should be well matched and thin as a whole, so as not to affect the electrocoagulation/electrotomy effect. Fig. 17 depicts another common mode of use of endoscopic scissors, i.e., the pair of blades of the scissors are open at a small angle for cutting thinner tissue, otherwise known as a light shear mode. In the light shear mode, the shear blade and the cutting edge thereof have small thrust on the tissue from the near end to the far end. In a light shear mode, the scissors are usually required to be opened and closed flexibly and easily, and a pair of scissors blades can be opened or closed quickly and comfortably, so that an operator can control the scissors accurately and efficiently. The existing endoscopic scissors design is usually only suitable for a certain use mode, and generally cannot be compatible with different use modes or functional performance under different use modes is deficient, so that surgeons usually need to be equipped with various endoscopic scissors, and particularly when the disposable endoscopic scissors are used, great resource waste is caused and the surgery cost is increased. As shown in fig. 14, the
Fig. 16 depicts a further improved design of the invention, a first blade 100 b. The first blade 100b is substantially identical in structure to the
Figures 19-23 illustrate another embodiment of the present invention,
The
With continued reference to fig. 19-21, the first mating surface 153c further includes a first interior chamfer 171c and a second interior chamfer 175 c. The first inner inclined surface and the second inner inclined surface define a concave space. The
In a further improved aspect, the first blade body 140c further includes a rib 161c, and the rib 161c extends from the vicinity of the first grinding
In another embodiment, the first inner bevel, the second inner bevel and the rib are shaped and dimensioned such that the first inner bevel, the second inner bevel and the rib are not exposed when the pair of
It should be apparent to those skilled in the art that the anti-slip effect can be improved by adapting the shape, size and position of the reinforcing bars. The laparoscopic scissors depicted in fig. 9-23 are straight scissors. When the laparoscopic scissors are curved scissors, the first blade and the second blade which constitute the laparoscopic scissors are usually different scissor blades with matching curves. In combination with the above cases, it is also easy to think of those skilled in the art that they can design the curved cavity mirror scissors compatible with the above three use modes in a similar way, with minor adaptations. Although the driving mechanism of the cavity mirror scissors is composed of the driving
Many different embodiments and examples of the invention have been shown and described. One of ordinary skill in the art can adapt the methods and apparatus described herein by making appropriate modifications without departing from the scope of the invention. Several modifications have been mentioned, and other modifications will occur to those skilled in the art. The scope of the invention should, therefore, be determined with reference to the appended claims, and not be construed as limited to the details of structure, materials, or acts shown and described in the specification and drawings.
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