CN111557711A - Novel laparoscopic scissors and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a new type of laparoscopic scissors comprising a first blade and a second blade, wherein the first blade comprises a first proximal driving part and a first distal blade body and a first mounting part connected thereto; the The second blade includes a second proximal drive portion and a second distal blade body and a second mounting portion connected thereto, the first blade body including a first tip, a first mating surface, a sharpening surface and a first On the outer side, the first grinding surface and the first mating surface intersect to form a first grinding edge, and the first grinding surface and the first outer side intersect to form a first transition edge. The upper part and the adjacent area of the first grinding edge are provided with anti-skid ribs, the anti-skid ribs are protruded from the first mating surface towards the outside of the first blade body, and a plurality of the anti-skid ribs form an anti-skid area. The second blade body includes a second cutting edge, a second mating surface, a second sharpening surface and a second outer side surface.

Description

A new type of laparoscopic scissors and its manufacturing method

technical field

The invention relates to minimally invasive surgical instruments, in particular to a novel laparoscopic scissors and a manufacturing method thereof.

Background technique

Surgical instruments have a history of hundreds of years. In surgery, doctors use different surgical instruments to complete operations such as tissue grasping, shearing, separation, coagulation, and suture closure. Surgical instruments have matured after hundreds of years of development. Laparoscopic surgery has been carried out clinically for more than 30 years and is making rapid progress. To put it simply, laparoscopic surgery (including laparoscopic surgery and fiberoptic endoscopic surgery) means that the surgeon uses an elongated endoscopic hand-held instrument to enter the patient's body through a natural orifice or a constructed puncture channel to complete tissue grabbing, cutting , separation, coagulation, suture closure and other operations.

Compared with traditional laparotomy, the main advantage of laparoscopic surgery is to reduce trauma, reduce pain and speed up recovery. In laparoscopic surgery, doctors usually can only touch the patient's internal organs with the help of instruments, and cannot directly feel it with their hands. In addition, the field of vision of the endoscopic surgeon is severely limited, and only the local area of the working head of the instrument can be observed in real time with the help of an endoscope and an imaging system. Due to the limited field of vision of the doctor and the lack of tactile feedback in endoscopic surgery, the accuracy, consistency and maneuverability of endoscopic hand-held instruments (endoscopic scissors, endoscopic grasping forceps, endoscopic separation forceps, etc.) high demands. So far, there are still many problems in all aspects of the performance of endoscopic hand-held instruments, which cannot meet the needs of the continuous improvement of endoscopic surgical skills and the continuous development of new types of endoscopic surgery.

SUMMARY OF THE INVENTION

Therefore, in order to solve the problems of the prior art, in one aspect of the present invention, a surgical instrument is proposed, a new type of laparoscopic scissors includes a first blade and a second blade, wherein the first blade includes a first proximal end A drive portion and a first distal blade body and a first mounting portion connected thereto; the second blade includes a second proximal drive portion and a second distal blade body and a second mounting portion connected thereto, the first The blade body comprises a first cutting edge, a first mating surface, a first sharpening surface and a first outer side surface, the first sharpening surface intersects with the first mating surface to form a first grinding edge, and the first sharpening surface The intersection of the surface and the first outer side surface forms a first transition edge, and on the first mating surface and in the vicinity of the first grinding edge, an anti-slip rib is provided, and the anti-slip rib faces the first mating surface toward the first grinding edge. A blade body protrudes from the outside, and a plurality of the anti-skid ribs form an anti-skid area. The second blade body comprises a second cutting edge, a second mating surface, a second sharpening surface and a second outer side surface, the second sharpening surface and the second mating surface intersect to form a second sharpening edge, the The intersection of the second grinding surface and the second outer side surface forms a second transition edge. On the second mating surface and in the vicinity of the second grinding edge, an anti-slip rib is provided, and the anti-slip rib is formed by the second mating surface. Protruding toward the outside of the second blade body, a plurality of the anti-skid ribs constitute an anti-skid area.

Specifically, the scissors further include a fixed plane, and the fixed plane and the first mating surface form an acute twist angle BX;

The fixed plane and the second mating surface form an acute twisted acute angle CX.

Specifically, the value of the acute twist angle BX (the acute twist angle CX) and the shape and size of the anti-slip rib are set so that the first blade and the second blade cooperate with each other to open or close any position, and the anti-slip of the first blade The ribs are not in contact with the anti-skid ribs of the second blade, the anti-skid ribs of the first blade are not in contact with the second mating surface, and the anti-slip ribs of the second blade are not in contact with the first mating surface.

Specifically, it also includes an elongated rod portion and a proximal handle. The handle includes a front handle, a rear handle and a handle shaft connected thereto, and the front handle and the rear handle can rotate relative to the handle shaft.

Specifically, it includes the following steps:

S1: Sheet Metal Forming

S2: Grinding the blade

S3: Processing anti-skid area

S4: Deburring

S5: Assemble the instruments, then package and sterilize.

Description of drawings

In order to more fully understand the essence of the present invention, the following will be described in detail with reference to the accompanying drawings, wherein:

Fig. 1 is a typical endoscopic hand-held instrument 10;

Figure 2 is an exploded view of the head assembly 40 shown in Figure 1;

FIG. 3 is a schematic side view of the head assembly 40 shown in FIG. 1;

FIG. 4 is a schematic projection view of the head assembly 40 shown in FIG. 1;

Fig. 5 is the blade schematic diagram of the head assembly shown in Fig. 4;

FIG. 6 is a schematic view of the improved first blade 100;

FIG. 7 is a schematic view of the improved second blade 200;

FIG. 8 is a schematic view of the improved head assembly 40;

FIG. 9 is a schematic diagram of yet another improved first blade 100a;

Figure 10 is a cross-sectional view of 10-10 of Figure 9;

FIG. 11 is a perspective view of the first blade 100a shown in FIG. 10;

Fig. 12 is a sectional view taken along line 12-12 of Fig. 11

13 is a perspective view of the second blade 200a;

Figure 14 is a perspective view of the head assembly 40a;

Figure 15 is a projection view of the head assembly 40a in a closed state;

FIG. 16 is a perspective view of yet another improved first blade 100b;

Figure 17 is a side projection view of the first blade 100b;

Figure 18 is a cross-sectional view taken along line 18-18 of Figure 17;

Figure 19 is a cross-sectional view taken along line 19-19 of Figure 17;

Figure 20 is a cross-sectional view taken along line 20-20 of Figure 17;

Figure 21 is a perspective view of the second blade 200b;

Figure 22 is a side projection view of the second blade 200b;

Figure 23 is a cross-sectional view taken along line 23-23 of Figure 22;

Figure 24 is a cross-sectional view taken along line 24-24 of Figure 22;

Figure 25 is a cross-sectional view taken along line 25-25 of Figure 22;

Figure 26 is a partial cutaway view of scissors fitting;

Figures 27-28 are schematic perspective views of the head of the scissors.

In all the views, the same reference numbers refer to equivalent parts or components.

Detailed ways

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 may be embodied in various ways. Therefore, what is disclosed 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 use the present invention.

Referring to FIG. 1 , for the convenience of description, the side close to the operator is defined as the proximal end, and the side away from the operator is defined as the distal end.

During laparoscopic surgery, a puncture cannula assembly (not shown) is usually used to establish a surgical channel for the instrument to enter and exit the patient's body through the body wall of the patient. Various minimally invasive surgical instruments, such as the hand-held instrument 10, can be formed by the cannula assembly. The channel is inserted into the body cavity. One or more cannula assemblies may need to be used at the same time during the operation, and the surgical hand-held instrument 10 is also configured with one or more of them for simultaneous operation according to the needs of the operation.

1 depicts a typical endoscopic hand-held instrument 10 including a proximal handle 20, a distal head assembly 40, and an elongated shaft 30 extending therebetween. The handle 20 includes a front handle 21 , a rear handle 22 and a handle shaft 23 connected thereto. The front handle 21 and the rear handle 22 can rotate relative to the handle shaft 23 . The elongated rod portion 30 includes an axis 31 , a runner 35 , an outer rod 50 and an inner rod 60 . The outer rod 50 and the wheel 35 are fixed in one piece and installed together in the handle 20 . The handle 20 limits the translational displacement of the wheel 35 along the axis 31 , but allows the wheel 35 to rotate around the axis 31 . In an optional solution, the handle 20 further includes an electrical plug 24 , one end of the electrical plug 24 is installed in the handle 20 and connected to the extension rod 30 , and the other end is exposed on the handle 20 . external. The electrical plug 24 can be matched with a standard lead wire to connect with a high-frequency electrocoagulation device. The head assembly 40 includes a head pin 45 , a fixed seat 70 , a driving mechanism 80 , a first blade 100 and a second blade 200 .

2-4 describe the structure, composition and functional relationship of the head assembly 40 in more detail. The first blade 100 includes a first blade body 140 , a first connecting portion 120 and a first fixing portion 130 connected thereto, and also includes a first fixing hole 135 penetrating the first fixing portion 130 and extending from the first connecting portion 120 to the first fixing portion 130 . The first connecting shaft 110 extends outward. The second blade 200 includes a second blade body 240 , a second connecting portion 220 and a second fixing portion 230 connected thereto, and also includes a second fixing hole 235 penetrating the second fixing portion 230 and extending from the second connecting portion 220 to the second fixing hole 235 . The second connecting shaft 210 extends outward. The driving mechanism 80 includes a slider body 81 , a first sliding groove 83 and a second sliding groove 85 which are concave downwards from two side surfaces thereof, and also includes a connecting groove 89 . The fixing base 70 includes a first cantilever 71 and a first pin hole 73 therethrough, a second cantilever 75 and a second pin hole 77 therethrough, the first cantilever 71 and the second cantilever 75 define a U-shaped groove 79.

3-4, wherein the first blade 100 and the second blade 200 are stacked on each other and installed between the first cantilever 71 and the second cantilever 75 in the fixed seat 70, the head pin 45 Through the first pin hole 73, the first fixing hole 135, the second fixing hole 135 and the second pin hole 77 in sequence, the first blade 100, the second blade 200 and the fixing seat 70 are connected together, wherein the head pin Both ends of the shaft 45 are riveted and fixed with the first cantilever 71 and the second cantilever 75 , and the first blade 100 and the second blade 200 can rotate around the head pin shaft 45 . The drive slider 80 is installed between the first cantilever 71 and the second cantilever 75 , and the drive slider 80 is located between the first connection portion 120 and the second connection portion 220 at the same time, and the first connection shaft 110 Matching with the first sliding groove 83 , the second connecting shaft 210 is matching with the second sliding groove 85 . The first pull rod head 31 of the inner rod 32 is matched with the connecting groove 89 , and the second pull rod head 39 (not shown in the figure) is connected with the handle 20 . The front handle 21 and the rear handle 22 are rotated around the peripheral shaft 23 to open or merge, and can drive the driving slider 80 in the U-shaped groove 79 along the axial direction 31 through the transmission force of the inner rod 32 . direction, the first sliding slot 83 drives the first connecting shaft 110 (while the second sliding slot 85 drives the second connecting shaft 210) to slide in it, thereby driving the first blade 100 and the second The blade 200 rotates around the head pin 45 to open or merge. For those skilled in the art, it should be easy to understand the mechanical principle that the translation of the chute drives the rotation of the working head. The working principle of the driving mechanism of the present invention can also be understood in conjunction with the working mechanism similar to the above-mentioned chute drive disclosed in the patent documents such as US Patent Nos. 5,496,347 and 8,114,120.

Those skilled in the art should understand that the endoscopic surgical instruments are generally classified into three major categories: endoscopic scissors, endoscopic separating forceps and endoscopic grasping forceps according to the shape and function of the head of the endoscopic surgical instrument. In one aspect of the present invention, a pair of endoscopic scissors 10 is provided, wherein the first blade 100 is the first blade 100 , and the second blade 200 is the second blade 200 . The first blade 100 includes a first blade body 140 , a first connecting portion 120 , a first fixing portion 130 , a first fixing hole 135 , and a first connecting shaft 110 . The second blade 200 includes a second blade body 240 , a second connecting portion 220 , a second fixing portion 230 , a second fixing hole 235 and a second connecting shaft 210 .

Referring now to FIGS. 4-5 , in a specific implementation solution, the first blade body 140 and the second blade body 240 are arc-shaped and matched with each other. More specifically, the first blade body 140 includes a first blade tip 151 , a first sharpening surface 152 , a first mating surface 153 and a first outer side surface 154 , wherein the first sharpening surface 152 is matched with the first sharpening surface 152 . The intersection of the faces 153 forms a first grinding edge 157 , and the intersection of the first grinding face 152 and the first outer side 154 forms a first transition edge 158 . The second blade body 240 includes a second cutting edge 251 , a second cutting edge surface 252 , a second mating surface 253 , and a second outer side surface 254 , wherein the second cutting edge surface 252 intersects the second mating surface 253 A second grinding edge 257 is formed that intersects the second cutting edge surface 252 and the second outer side surface 254 to form a first transition edge 258 .

The first blade 100 and the second blade 200 are assembled together to form the head assembly 40, wherein the first mating surface 153 and the second mating surface 253 are matched with each other without contacting or partially contacting each other, the first grinding The edge 157 and the second grinding edge 257 are in point contact. When the handle 20 is operated to open or close the first blade body 140 and the second blade body 240, the first grinding edge 157 and the second blade body 240 are in contact with each other. The grinding edge 257 maintains point contact at all times. U.S. invention patents US5478347, US6168605, and US8114107 respectively disclose the arc-shaped design of the blade and the method for maintaining point contact, and those skilled in the art can directly quote or make some adaptations to realize the first grinding of the present invention. The edge 157 and the second grinding edge 257 are always in point contact.

Referring now to FIGS. 6-8 , in another improved design solution, the first blade body 140 further includes an anti-slip area 160 , and the second blade body 240 further includes an anti-slip area 260 . As shown in FIG. 6 , in more detail, the root groove 161 penetrates the first grinding surface 152 and the first outer surface 154 at the same time; in the direction substantially parallel to the transition edge 158 , the cross section of the root groove 161 is U-shaped; in the direction substantially perpendicular to the transition edge 158, the cross-section of the root groove 161 is triangular. The two adjacent tooth root grooves 161 define anti-skid teeth 165 , and the plurality of anti-skid teeth 165 and the plurality of tooth root grooves 161 constitute the anti-skid area 160 of the present invention. As shown in FIG. 7 , in more detail, the root groove 261 penetrates the second cutting edge surface 252 and the second outer side surface 254 at the same time; in the direction substantially parallel to the transition edge 258 , the cross section of the root groove 261 is U-shaped; in the direction substantially perpendicular to the transition edge 258, the cross-section of the root groove 261 is triangular. The two adjacent tooth root grooves 261 define anti-skid teeth 265, and the plurality of anti-skid teeth 265 and the plurality of tooth root grooves 261 constitute the anti-skid area 260 of the present invention.

Referring now to FIG. 8, when the instrument 10 is used to cut or separate tissue in a patient, the non-slip zone 160 (and or the non-slip zone 260) is usually in direct contact with the tissue, which increases the frictional resistance between the tissue and the blade , to prevent slippage during cutting/separating tissue, and achieve precise cutting/separation. Due to the limited field of vision of the surgeon and the lack of tactile feedback during endoscopic surgery, the anti-slip function of the anti-slip area is very important, and most surgeons prefer endoscopic scissors with anti-slip function. However, in the technical documents disclosed so far, there is no single-use endoscopic scissors with the anti-slip structure of the present invention. The single-use endoscopic scissors that have been commercialized, mass-produced, sold and used also do not contain the anti-slip structure of the present invention.

In one aspect of the present invention, a sheet metal manufacturing method for disposable endoscopic scissors is proposed, and the steps are as follows:

S1: Sheet metal forming, using a stainless steel plate with a suitable thickness, using a sheet metal stamping die to make the first (second) blade;

S2: grinding the blade, grinding the first (second) blade to form a first (first) grinding surface and a first (second) grinding edge;

S3: Process the anti-skid area, and manufacture the first (second) tooth root groove by grinding or cutting;

S4: Deburring, chamfering and deburring all the corners formed by machining the tooth root groove;

S5: Assemble the instrument 10, then package and sterilize.

Using the aforementioned sheet metal manufacturing method to process the anti-skid area has low processing efficiency and high processing cost; and the processing of the first (second) tooth root groove forms more sharp edges, and the cost of deburring is high, which greatly increases one time. The production cost of endoscopic scissors is not suitable for mass production.

In another aspect of the present invention, an improved manufacturing method of disposable endoscopic scissors is proposed, and the steps are as follows:

S1: Molding: The metal powder injection molding process (hereinafter referred to as MIM) is used to mold the first (second) blade including the first (second) anti-skid zone;

S2: Grinding: grinding the first (second) blade to form a first (second) grinding surface and a first (second) grinding edge;

S3: Deburring, deburring is performed on the corners where the first (second) grinding surface and the first (second) tooth root groove are formed by grinding;

S4: Assembling the instrument 10 and packaging for sterilization.

Using the aforementioned MIM method to manufacture disposable endoscopic scissors with a non-slip area, since the pre-powder injection molded first (second) blade contains a non-slip area (tooth root groove), a large vibration will be generated when grinding the blade ( Fluctuation), which seriously affects the sharpness of the blade, and a large number of burrs are generated between the edges where the first (second) grinding surface and the first (second) tooth root groove meet, the cost of deburring is high, and the overall production cost is still Higher, not suitable for mass production.

9-14 depict yet another embodiment of the present invention, endoscopic scissors 11 . The structure and composition of the scissors 11 and the instruments 10 are similar (note that the same parts of the scissors 11 and the instruments 10 are not shown in the subsequent drawings. In the subsequent description and the accompanying drawings, all the same reference numerals means equivalent parts or components).

The scissors 11 include a handle 20 , a distal head assembly 40 a , and an extension rod 30 . The head assembly 40a includes a head pin 45, a fixing base 70, a driving mechanism 80, a first blade 100a and a second blade 200a. The first blade 100 a includes a first blade body 140 a , a first connecting portion 120 , a first fixing portion 130 , a first fixing hole 135 and a first connecting shaft 110 . The second blade 200a includes a second blade body 240a , a second connecting portion 220 , a second fixing portion 230 , a second fixing hole 235 and a second connecting shaft 210 .

9-12, in one design, the first blade body 140a includes a first cutting edge 151, a first sharpening surface 152, a first mating surface 153 and a first outer side surface 154, wherein the first cutting edge 151 A grinding surface 152 intersects with the first mating surface 153 to form a first grinding edge 157 , and the first grinding surface 152 intersects with the first outer side surface 154 to form a first transition edge 158 . The first blade body 140a further includes a non-slip area 160a. As shown in FIGS. 11-12 , in more detail, the anti-slip groove 161 a is disposed on the first mating surface 153 and in the vicinity of the first grinding edge 157 , and the anti-slip groove 161 a faces from the first mating surface 153 The first blade body 140a is recessed inside. The two adjacent anti-skid grooves 161a define an anti-skid rib 165a, and a plurality of the anti-skid grooves 161a and the anti-skid ribs 165a constitute the anti-skid area 160a of the present invention.

Referring now to FIG. 13, in an optional design solution, the second blade body 240a includes a second cutting edge 251, a second cutting edge surface 252, a second mating surface 253 and a second outer side surface 254, wherein the The intersection of the second cutting edge surface 252 and the second mating surface 253 forms a second grinding edge 257 , and the intersection of the second cutting edge surface 252 and the second outer surface 254 forms a first transition edge 258 . The first blade body 240a further includes a non-slip area 260a. The anti-slip groove 261a is disposed on the second mating surface 253 and in the vicinity of the second grinding edge 257, and the anti-slip groove 261a is recessed from the second mating surface 253 toward the inside of the second blade body 240a. The two adjacent anti-skid grooves 261a define an anti-skid rib 265a, and a plurality of the anti-skid grooves 261a and the anti-skid ribs 265a constitute the anti-skid area 260a of the present invention.

FIG. 14 depicts a common mode of use of the scissors 11 , ie, a pair of scissors blades of the scissors 11 are opened to the maximum angle for cutting thicker tissue, or a re-cut mode. In this re-cutting mode, when a pair of scissors are closed to cut and crush the tissue, the scissors and their blades will generate a greater thrust on the tissue from the proximal end to the distal end. Fig. 15 depicts another common usage mode of the scissors 11, that is, a pair of scissors blades of the scissors 11 are completely combined for blunt dissection, or tissue coagulation or high-efficiency electrocution, or called electrosurgery cut mode. Especially when used for tissue coagulation or high-efficiency electric cutting, the scissors 11 are well matched and the non-slip area is not exposed, so as not to affect the coagulation/cutting effect. When a pair of scissors are combined for electric cutting, the tissue is charred and attached to the outer surface of the blade. If the outer surface has anti-slip teeth, it is extremely difficult to clean up. The existing design of endoscopic scissors is usually only suitable for a certain mode of use, and usually cannot be compatible with different modes of use or lack of functional performance under different modes of use, which leads the surgeon to be equipped with a variety of endoscopic scissors, especially for the use of endoscopic scissors. Disposable laparoscopic scissors cause a great waste of resources and increase the cost of surgery.

Continuing to refer to FIG. 14 , the head assembly 40a of the endoscopic scissors 11 includes a non-slip area 160a and/or an anti-slip area 260a, and its anti-slip function is the same as the anti-slip area 160 and/or the anti-slip area 260 of the head assembly 40 of the endoscopic scissors 10 functions are similar. Comparing the first blade 100a and the first blade 100, the anti-skid area 160 has more obvious anti-skid effect than the anti-skid area 160a. If the anti-skid effect is compared alone, the blade 100 is obviously better than the blade 100a. However, those skilled in the art should understand that, in order to save operation cost and operation time, endoscopic scissors are usually used not only for cutting tissues or organs, but also for blunt dissection and coagulation. As shown in Figure 15, usually after the first blade and the second blade of the endoscopic scissors are closed, the non-slip area is not exposed. When used for blunt tissue separation, or the first outer side of the first scissors is used for tissue electroporation Congeal. The function (performance) of the blade 100a is significantly better than that of the blade 100 according to the comparison of blunt separation or electrocoagulation effect. Comprehensively consider the shearing performance of endoscopic scissors (such as sharpness and anti-slip performance), blunt separation performance (such as preventing sharp edges and corners from accidentally damaging other organs or tissues), and electrocutting and coagulation performance, and how to improve processing and manufacturing efficiency to reduce Cost, a variety of factors are intertwined, making it difficult to find a design balance.

16-27 depict yet another embodiment of the present invention, laparoscopic scissors 12. The structure and composition of the scissors 12 and the instruments 10 are similar (note that the same parts of the scissors 12 and the instruments 10 are not shown in the subsequent figures. In the subsequent description and the accompanying drawings, all the same reference numerals are used. means equivalent parts or components).

The scissors 12 include a handle 20 , a distal head assembly 40 a , and an elongated shaft 30 . The head assembly 40b includes a head pin 45, a fixing seat 70, a driving mechanism 80, a first blade 100b and a second blade 200b. The first blade 100b includes a first blade body 140b , a first connecting portion 120 , a first fixing portion 130 , a first fixing hole 135 and a first connecting shaft 110 . The second blade 200b includes a second blade body 240b , a second connecting portion 220 , a second fixing portion 230 , a second fixing hole 235 and a second connecting shaft 210 .

16-17, in a design solution, the first blade body 140b includes a first blade tip 151, a first sharpening surface 152, a first mating surface 153 and a first outer side surface 154, wherein the first blade body 140b A grinding surface 152 intersects with the first mating surface 153 to form a first grinding edge 157 , and the first grinding surface 152 intersects with the first outer side surface 154 to form a first transition edge 158 . The first blade body 140b further includes a non-slip area 160b. As shown in FIG. 16 , FIG. 17 and FIG. 20 , in more detail, the anti-skid rib 161b is provided on the first mating surface 153 and in the vicinity of the first grinding edge 157 , and the anti-skid rib 161b is formed by the first The mating surface 153 protrudes toward the outside of the first blade body 140a, and a plurality of the anti-skid ribs 161b form the anti-skid area 160b of the present invention.

Continuing to refer to FIGS. 17-20 , the first fixing portion 130 includes a fixing plane 131 , and the first mating surface 153 is twisted at a certain angle relative to the fixing plane 131 . More precisely, any cutting plane perpendicular to the fixing plane 131 intersects the first mating surface 153 , and the intersection line and the fixing plane 131 form an acute angle BX. That is, the first mating surface 153 forms a certain acute twist angle BX with respect to the fixing plane 131 .

21-25, in an optional design solution, the second blade body 240b includes a second cutting edge 251, a second cutting edge surface 252, a second mating surface 253 and a second outer side surface 254, wherein The second cutting edge surface 252 intersects with the second mating surface 253 to form a second grinding edge 257 , and the second cutting edge surface 252 intersects with the second outer surface 254 to form a first transition edge 258 . The first blade body 240b further includes a non-slip area 260b. The anti-slip rib 261b is disposed on the second mating surface 253 and in the vicinity of the second grinding edge 257, and the anti-slip rib 261b protrudes from the second mating surface 253 toward the outside of the first blade body 240a. A plurality of the anti-skid ribs 261b form the anti-skid area 260b of the present invention.

Continuing to refer to FIGS. 22-25 , the first fixing portion 230 includes a fixing plane 231 , and the second mating surface 253 is twisted at a certain angle relative to the fixing plane 231 . More precisely, any cutting plane perpendicular to the fixing plane 231 intersects the first mating surface 253 , and the intersection line and the fixing plane 231 form an acute angle CX. That is, the second mating surface 253 forms a certain acute twist angle CX with respect to the fixing plane 231 .

Referring now to Figures 26-27, the values and directions of the BX and CX are set so that when how many of the first grinding edge 157 and the second grinding edge 257 are matched to each other to form any point contact PX, the acute twist angle BX and the acute twist angle are The twisting direction of CX is such that the first mating surface 153 (the second mating surface 253 ) is away from the horizontal plane PY through the point contact PX. The value of the acute twist angle BX (the acute twist angle CX) and the shape and size of the anti-slip rib 161b (the anti-slip rib 261b) are set as follows: the first blade 100b and the second blade 200b cooperate with each other to open or close any position, the anti-slip The rib 161b and the anti-slip rib 261b are not in contact, and the anti-slip rib 161b is not in contact with the second mating surface 253 , and the anti-slip rib 261b is not in contact with the first mating surface 153 .

Those skilled in the art should understand that, when the first blade 100b is compared with the first blade 100a, the anti-skid area 160b has a more obvious anti-skid effect than the anti-skid area 160a. Due to the limited size of endoscopic scissors, the shearing performance (such as sharpness and anti-slip performance), blunt separation performance (such as preventing accidental damage to other organs or tissues by sharp edges and corners), and electrocution of endoscopic scissors should be comprehensively considered. Therefore, the size of the anti-skid area, the design of anti-skid ribs or anti-skid grooves is usually very small. When using endoscopic scissors to cut tissues or organs, the tissues or organs are covered on the outer surfaces of the first mating surface 153 and the second mating surface 253. When the size of the anti-slip ribs and the anti-slip grooves is small, obviously the anti-slip effect of the anti-slip ribs is excellent. in anti-skid grooves.

Those skilled in the art should understand that if the aforementioned sheet metal manufacturing method is adopted, that is, the sheet metal is first punched to form a blade, and then cut or ground to form a non-slip area, the manufacturing cost of the first blade 100b is extremely high, and the cost of manufacturing the first blade 100b is extremely high. Much higher than the manufacturing cost of the first blade 100a. An ordinary skilled person may understand that, if the MIM method is used for manufacturing, the MIM manufacturing costs of the first blade 100b and the first blade 100a are basically the same except for the slight cost difference of mold manufacturing. If only the MIM production link is considered, the cost is indeed equivalent, but considering the comprehensive manufacturing cost, the cost of the first blade 100b is far lower than the first blade 100a. Those skilled in the art should be able to understand that when the first blade 100b (100a) is used to make endoscopic scissors, especially when one-time use of endoscopic scissors, the blade generally needs to be polished, passivated, cleaned and removed. Oil or other surface contamination. In the process of polishing, passivation or cleaning, the protruding anti-skid ribs on the first cutting edge surface of the first blade 100b are convenient for polishing, passivation or cleaning. On the other hand, the anti-skid groove recessed downward on the first cutting edge surface of the first blade 100a is difficult to polish and passivate, and during long-term storage, the anti-skid groove is likely to accumulate dust or other dirt, and cleaning (such as ultrasonic cleaning) ) when the water flow is not easy to take away the dust or dirt in the anti-skid groove.

Those skilled in the art should easily think that the shape, size and position of the anti-skid ribs can be adapted to improve the anti-skid effect. Although the first blade 100a (100b) and the second blade 200a (200b) disclosed in the present invention respectively contain anti-skid grooves or anti-skid ribs on the surface of the first mating surface 153 (second mating surface 253), an ordinary skilled person should It is conceivable that a combination of anti-skid ribs or anti-skid grooves is also possible. Combined with the disclosure of the first blade 100, it is also conceivable that the first cutting edge surface 152 (the second cutting edge surface 252) may also include anti-skid ribs or anti-skid grooves (as shown in FIG. 28 ). It should be easy to think that the anti-skid rib can be extended to intersect with the first outer side surface, and other simple adaptive modifications can also be made to the anti-skid rib. The cases shown in the drawings in the description of the present invention are all curved scissors. However, an ordinary skilled person should easily think that the design of the locking non-slip area of the present invention can also be applied to straight scissors. When applied to straight scissors, the first The first blade and the second blade may then be identical. Although both the first blade and the second blade include the anti-slip area in the illustrated case, those skilled in the art should understand that only one blade including the anti-slip area can also have a significant anti-slip effect. Although in the case shown, the driving mechanism of the endoscopic scissors is composed of the driving slider 80 and the connecting shaft 110, but other disclosed prior art can also be used instead, such as US5478347, US6168605, US8114107 and other US patents disclosed The chute mechanism or linkage mechanism. Or according to the inspiration of the prior art, it is also within the protection scope of the present invention to modify and replace the driving slider 80 and the connecting shaft 110 described in the present invention.

Many different embodiments and examples of the present invention have been shown and described. One of ordinary skill in the art, without departing from the scope of the present invention, can make adaptations to the described methods and apparatus with appropriate modifications. Several modifications have been mentioned, and others are conceivable to those skilled in the art. The scope of the invention should therefore be determined in accordance with the appended claims and should not be construed as limited by the details of the structures, materials or acts shown and described in the specification and drawings.

Claims (5)

1. a novel laparoscopic scissors comprises a first blade and a second blade, wherein the first blade comprises a first proximal drive part and a first distal blade body and a first mounting part connected thereto; The two blades comprise a second proximal driving part and a second distal blade body and a second mounting part connected thereto, and are characterized in that: 1) The first blade body comprises a first cutting edge, a first mating surface, a first sharpening surface and a first outer side surface, and the first sharpening surface and the first mating surface intersect to form a first grinding edge, The first grinding surface and the first outer surface intersect to form a first transition edge, and on the first mating surface and in the vicinity of the first grinding edge, anti-skid ribs are provided, and the anti-skid ribs are formed by the first grinding edge. The mating surface protrudes toward the outside of the first blade body, and a plurality of the anti-skid ribs form an anti-skid area; 2) the second blade body comprises a second cutting edge, a second mating surface, a second sharpening surface and a second outer side surface, the second sharpening surface and the second mating surface intersect to form a second grinding edge, The second grinding surface and the second outer surface intersect to form a second transition edge, and on the second mating surface and in the vicinity of the second grinding edge, anti-skid ribs are provided, and the anti-skid ribs are formed by the second edge. The mating surface protrudes toward the outside of the second blade body, and a plurality of the anti-skid ribs form an anti-skid area. 2. scissors as claimed in claim 1, is characterized in that, described scissors also comprises fixed plane, described fixed plane and the first mating surface form twisted acute angle BX; Described fixed plane and the second matched surface form twisted acute angle twist Acute angle CX. 3. scissors as claimed in claim 2, is characterized in that, the numerical value of twisted acute angle BX (twisted acute angle CX) and the shape and size of anti-skid rib are set to, make described first blade and second blade cooperate with each other to open or At any position of closing, the anti-slip rib of the first blade does not contact the anti-slip rib of the second blade, and the anti-slip rib of the first blade does not contact the second mating surface, while the anti-slip rib of the second blade The ribs are not in contact with the first mating surface. 4. The scissors of claim 1, further comprising an elongated stem and a proximal handle. The handle includes a front handle, a rear handle and a handle shaft connected thereto, and the front handle and the rear handle can rotate relative to the handle shaft. 5. scissors as claimed in claim 1, is characterized in that, comprises the following steps: S1: Sheet Metal Forming S2: Grinding the blade S3: Processing anti-skid area S4: Deburring S5: Assemble the instruments, then package and sterilize.

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