WO2005065895A1

WO2005065895A1 - Cutting scissors

Info

Publication number: WO2005065895A1
Application number: PCT/JP2004/017000
Authority: WO
Inventors: Hidemi Adachi
Original assignee: Adachi Industry Co., Ltd.
Priority date: 2004-01-05
Filing date: 2004-11-16
Publication date: 2005-07-21
Also published as: JPWO2005065895A1; TWM267044U

Abstract

Cutting scissors for hair dressing capable of easily cutting hair, wherein two blade bodies having blade parts and grip parts are pivotally fixed to each other, and the blade parts are opened to a rather bottom side according to the angle of opening of the grip parts. The edge line of at least one of the blade bodies is formed in a line recessed from an edge side end part at a pivoted portion in the blade body width direction when the tip of the blade body is connected to a pivot axis. Also, the other blade body may be formed so that the intermediate portion of the blade tip line is swelled to follow up the recess of the edge line of the one blade body and that the edge line from the base end to the tip thereof is curved in a projected shape.

Description

Specification

Cutting shears

Technical field

[0001] The present invention relates to an improvement in cutting scissors for hairdressing and beauty, in which two blades having a blade portion and a handle portion are pivotally connected. Related to power scissors that can be opened to the back.

Background art

[0002] Hairdressing scissors include normal scissors, both of which have a straight blade, and comb scissors, one of which has a comb-like shape. Normal scissors are called cut scissors. In addition, the portion of the blade body with the blade on the tip half side is referred to as a "blade portion" in this specification.

[0003] When cutting hair with cutting scissors, there are various uses of the scissors according to each stage of the hairdressing and beauty work.

For example, hair is cut at the tip of the blade, near the center of the blade, or relatively near the base of the blade (from the pivot axis). When cutting hair with scissors, pulling off is better than pushing off. The force S, which is cut off while sliding on the edge of the closing scissors, is cut off. Also, if you are trying to cut a lot of hair with one closing operation, open the blade part as far as it will go, and hold the hair deeply, so that the length of slipping of the hair is ensured long It is.

[0004] For example, Fig. 9 shows a state in which the cutting scissors 100 are opened by 15 degrees, and the two blades 110, 120 have their center lines (the axis Q of pivotal connection and the blade 111). , 121) A straight line connecting the tip Y of La) and Lab. The opening of the opened blade portions 111 and 121 has a depth W as shown in the figure. The intersection point Q between the center lines La and Lb is naturally the position of the pivot axis. The depth W of the opening is the intersection point P between the cutting edge lines A and B. The depth W (that is, the intersection point P) becomes shallower when the cutting edge lines A and B are separated from the center lines La and Lb. Conversely, as the edge lines A and B approach the center lines La and Lb, the depth W becomes deeper.

[0005] At this time, the handle portions 112 and 122 are also opened by 15 degrees. For example, as shown in FIG. 9, a line connecting “points Ra and Rb where the finger ring 112a abuts on the other finger ring 122a” and “the pivot axis Q” Ma and Mb (hereinafter referred to as “abutment lines Ma and Mb”) are at an angle j3 that opens at 15 degrees. When the cutting scissors 100 are closed, the finger rings 112a and 122a are in contact with each other as shown in FIG. 10, so that the contact lines Ma and Mb also overlap. In addition, the center lines La and Lb of the blade part also overlap.

[0006] The above example is an example in which the center lines La and Lb of the blade portion, the contact lines Ma and Mb of the handle portion, and the force S are connected in a straight line.

The center lines La and Lb and the contact lines Ma and Mb are not necessarily in a straight line, but in different directions, depending on how the handle portions 212 and 222 are provided, as in the case of the cutting scissors 200 shown in FIG. Sometimes. Even in this case, as shown in Fig. 12, the opening angle of the contact lines Ma and Mb of the handle and the opening angle of the center lines La and Lb are always the same. The point where its center line opens 15 degrees is the same.

[0007] In the scissors for hairdressing and beauty, the back surface of the blade is formed in a curved concave portion having the inner surface of a cylinder 200 as shown in the conceptual diagram of FIG. In other words, the hairdressing scissors have a portion 202 cut off from the cylinder 200 in FIG. 13 along a curve 201, the remaining portion 203 serves as a blade, and 204 serves as a cutting edge. The dashed line K shown in FIG. 13 is the bus K drawn at the lowest part in this figure.

The reason why such a curved concave portion is provided on the back of the blade is to ensure that the cutting edges of the two blades touch each other when the scissors are opened and closed. In other words, scissors cannot cut hair unless the cutting edges touch each other. However, if the back surface of the blade body is not concave, the scissors may come into contact with each other, and if the back surfaces touch each other, contact between the cutting edges may be hindered. Therefore, the back of the blade is formed in a curved concave portion so that the backs of the blades do not touch each other.

[0008] This bus bar K is considered to be technically correct to be parallel to the cutting edge line 204 as shown in FIG. Fig. 14 shows the back 211 of the actual blade 210. The cutting edge line 212 is slightly curved as shown in Fig. 14 and not a perfect straight line. ing. This protrusion is a force of 0.3-0.5 mm with respect to a straight line connecting both ends of the cutting edge line, or a protrusion of at most about 0.3 mm, so that the cutting edge line 212 approximates a straight line. I have. Therefore, the generating line K is also a straight curved line It is an approximate line. At this time, the bus K is drawn by a single line so as to pass through the screw hole 213 for pivotally mounting the blade. Then, as shown in FIG. 14, a curved concave portion having a cylindrical inner surface is formed such that the generating line K extends along the cutting edge line 212 and passes through the back side 214 of the blade body.

This curved concave portion of the blade back 211 is generally ground by a disk grindstone 300 as shown in FIG. Then, the curved concave portion on the back side of the blade is ground while moving the disk whetstone 300 so that the apex 301 thereof draws the above-mentioned generatrix K. In this case, the blade is passed not only at the blade portion but also over the screw hole, and the back of the blade of the pivot portion 215 is simultaneously ground. As a result, the peripheral edge 216 of the curved concave portion appearing at the pivoted portion 215 becomes a semicircular shape as shown in FIG. 14, and the contact surface 217 shown in black in FIG. 14 is formed around the peripheral edge. . The contact surface 217 is a surface where the flat surface of the back of the blade that has not been ground remains. When the two blades are pivoted with screws, the contact surfaces 217 come into contact with each other. Further, a portion 218 shown in black along the cutting edge is a portion that comes into contact with the other cutting edge. In FIG. 14, black portions 217 and 218 in FIG. 14 are portions that come into contact with the blade of the partner, and all other white portions are curved concave portions and are portions that do not touch the blade of the partner.

Disclosure of the invention

Problems to be solved by the invention

[0010] In order to open the cutting scissors all the way, the handle must be widened accordingly, and as a result, the finger holding the scissors must be widened accordingly. However, hairdressers use scissors all day, and during that time, they repeatedly open and close the scissors continuously, so it is preferable that the burden of this opening and closing operation be as small as possible. For this purpose, it is desirable to open the handle so that the depth of the blade is deep even if the opening and closing width of the handle is small. This is because even if the width of the finger is small, opening the scissors deeply will reduce the burden on the hairdresser.

Therefore, an object of the present invention is to provide cutting scissors for hairdressing and beauty, in which the blade portion opens relatively deep with respect to the opening angle of the handle portion, and the hair is easily cut.

Means for solving the problem

[0011] Hereinafter, means related to the present invention will be described with reference to the drawings used in embodiments described below. explain.

(1) In the present invention, the cutting scissors for hairdressing and beauty, in which two blades are pivotally connected, the cutting edge of one of the blades is composed of the blade tip and the pivotally connected portion of the blade (see FIG. 3). (See reference numeral 14) and a position retracted from the blade-side end (see reference numeral 15 in the same figure). It was formed. Generally, the cutting edge line of the cutting scissors is slightly curved but is approximately approximated by a straight line, and the cutting edge line approximated by this straight line is provided so as to recede.

(2) The cutting edge of the other blade has a shape in which an intermediate portion of the cutting edge (see reference numeral Z in FIG. 4) is bulged so as to follow the retreat of the cutting edge of the one blade. It was formed so that

(3) Further, the blade backs of the two blades are provided on the blade backs with curved concave portions forming the inner surface of the cylinder in a direction in which the cylinder is in the longitudinal direction of the blade.

At this time, the concave portion of one blade body has the following first concave portion and second concave portion. That is, the first concave portion is a concave portion provided such that the first generatrix drawn at the bottom of the concave portion passes through a screw hole for pivoting provided in the pivot portion. The second recess is formed at a base end of a second bus force blade portion drawn at the bottom of the recess so as to start from a position retracted to the back side of the first bus bar. Yes (see claim 1 above)

[0012] (4) In claim 1, one of the blade bodies indicates the blade body tip and the "position retracted from the blade side end" as positions through which the blade tip line passes. The “retracted position” may be limited to “pivot axis” (see claim 2). The pivot shaft is located at a position retracted from the blade-side end.

That is, as shown in FIG. 3, the cutting edge line A approximated to a straight line passes near the axis of the pivot shaft. The vicinity of the axis may be, for example, one that passes through a small circle with a radius of lmm or 1.5 mm around the axis if the blade width of the pivot portion is 11 mm. Les ,. Alternatively, it may be one that passes through a small circle having a radius of 10% or less of the blade width.

[0013] With the above configuration (1) or (4), in the cutting scissors of the present application, both of them are provided. The other cutting edge line has a different shape. That is, one edge line has a bulging shape, while the other edge line has a shape approximating a straight line.

In this regard, in general cutting scissors, both cutting edge lines are both approximated to straight lines, and when viewed strictly, they are slightly curved, but the curves are the same shape. It will be different.

The invention's effect

[0014] As described above, the cutting scissors of the present application have a greater opening depth of the scissors as compared with the cutting scissors in which the blade portion is not receded. That is, if one of the blade edges is retracted, the edge line of the blade is farther away from the blade edge line of the pair of open scissors by the amount of retreat, and the depth of the opening of the scissors is correspondingly increased. is there.

[0015] For example, if the base end side of the cutting edge line is a line passing through the pivot axis as described in claim 2, this cutting edge line A is close to the center line La as shown in FIG. It will be. In this regard, in general cutting scissors as shown in FIG. 9 and FIG. 11, the cutting edge line B does not recede as in the present application. (Reference numeral 125 in FIG. 9 and reference numeral 225 in FIG. 11) ".

Compared with such a general cutting edge line B, the present application is a cutting edge line that is receded to the back 13 side, and as shown in FIG. 4, even if the opening angles of the center lines La and Lb are the same, the cutting edge The intersection of the lines is in a recessed position. In other words, the depth of the opening of the scissors is deeper than that of the cutting scissors in which the blade is not receded.

[0016] Also, in the configuration of (2), the intermediate portion of the cutting edge line is bulged so as to follow the retreat of the cutting edge line of the one blade body. You can cut your hair quickly. This is for the following reasons.

[0017] In general, when cutting hair, scissors have an appropriate angle range at an intersection angle (hereinafter, referred to as an "intersection angle") at an intersection of the cutting edge lines, and even if this angle is too narrow or too wide. Re, not appropriate. The reason is that if the intersection angle is too wide, the hair sandwiched between the two blades will slide too much on the cutting edge when closing the scissors, so the hair will not escape and be caught, so the hair cannot be cut. It is.

Conversely, if it is too narrow, it will not slip and will cut off the hair, so the closing operation when cutting It is difficult to cut because of the load.

[0018] On the other hand, even if the center lines have the same opening angle, if the depth of the opening of the scissors is increased, the intersection angle tends to decrease. FIG. 16 is a diagram conceptually showing scissors in which the opening angle of the scissors is the same and the way of providing the cutting edge line is set in two patterns. Like the two cutting edge lines ((Al, B) and (A2, B)) shown in this figure, even if the center lines La and Lb have the same opening angle, the intersection points P1 and P2 have a deep depth. Direction of intersection P2 Intersection angle becomes small as (θ> Θ)

1 2 This means that the cutting scissors according to the present invention, which can increase the depth, are sharp at the intersection angle force.

If the angle of intersection is small, there is a problem of difficulty in cutting hair.

By the way, there is another situation as described below regarding the intersection angle. That is, as shown in (a) and (b) of FIG. 17, scissors generally have a smaller intersection angle ほど as the intersection P is closer to the tip of the blade portion. In the case of scissors having a smaller intersection angle as in the present invention, the intersection angle closer to the tip of the scissors is even smaller. As a result, near the tip of the scissors, the intersection angle falls below the angle range suitable for cutting hair, making it difficult to cut hair. In other words, when the intersection angle Θ force S decreases, the two cutting edges gradually approach parallel, the hair cannot slide, the hair is pushed out, the closing resistance increases, and the cutting becomes difficult. . As described above, the problem of difficulty in cutting due to a small intersection angle is a problem that tends to occur on the tip side of scissors.

[0020] On the other hand, in the configuration (2) of the present invention, as illustrated in FIG. 18, the other cutting edge line B1 protrudes so as to follow the retreat of one cutting edge line A. It was formed in the shape shown. In this way, if the other cutting edge line B1 is formed to be curved from the base end X to the tip end Y, the cutting edge line B1 has a shape that warps toward the back side 23 of the cutting portion 21 near the tip end Y. can get. Therefore, even at the same intersection point P, a large intersection angle Θ can be obtained as compared with the intersection angle Θ of such a cutting edge line B2 that is not convexly curved. Intersection angle like this

twenty one

By increasing the degree, the intersection angle suitable for cutting hair can be secured, and hair can be cut easily.

[0021] In addition, by having the configuration as described in (3), the cutting edges of each other can exert a force S for making sure contact necessary for cutting.

In other words, as shown in FIG. 19, the first concave portion If the second concave portion 18b is formed with the same generatrix as the generatrix Ka of the portion 18a, the cutting edge S is separated from the counterpart cutting edge (see reference numeral G in FIG. 19), and there is a disadvantage that the cutting edge S cannot contact. Because. For this purpose, it is necessary to also retract the curved strong concave portion (second concave portion) corresponding to the retracted cutting edge line A, which is expressed in the form of retreat of the generating line. As a result, the curved concave portion on the back of the blade can be appropriately arranged as the second concave portion, and the contact between the blade edges becomes good, and as a result, good cutting performance can be obtained.

[0022] (5) In the present invention, the back of the one blade body (the opposite side of the blade) is retracted by an amount corresponding to the retraction of the cutting edge line (see claim 3). In general, scissors require a force that pushes the two cutting edges against each other with a vertical force on the back of the cutting blade (this is called “side pressure”), and this side pressure is one of the factors that maintain cutting performance. I have. Without such lateral pressure, when cutting hair, the cutting edges are separated from each other (in the vertical direction of the back surface of the cutting blade), and a gap is formed between the cutting edges, which may hinder cutting performance. . Therefore, the blade must have sufficient strength and thickness to generate such lateral pressure.

In this regard, when the blade tip line is retracted, the width of the blade portion is reduced by the amount of retreat, and the strength of the blade portion is also weakened.However, in the present application, the width of the blade portion is reduced because the peak is retracted. It can be avoided, and its strength can be maintained, so that sufficient lateral pressure can be obtained.

Brief Description of Drawings

FIG. 1 is a plan view of the cutting scissors shown in the embodiment.

FIG. 2 is a bottom view of the cutting scissors of FIG. 1.

FIG. 3 is a bottom view when the cutting scissors of FIG. 1 are opened.

FIG. 4 is a view in which the outline of the scissors when the cutting scissors are opened is seen through.

FIG. 5 is a diagram showing the back of a stationary blade, which is the other blade.

FIG. 6 is a view showing the back of a moving blade which is one blade body.

[FIG. 7] This figure compares the depth when (a) the cutting scissors of the embodiment of the present invention and (b) the cutting scissors other than the present invention are both opened at the same angle of 15 degrees. FIG.

FIG. 8 shows (a) cutting scissors according to an embodiment of the present invention and (b) cutting scissors other than the present invention, Both figures are opened by a 5-degree angle, which is smaller than that in Fig. 7, and the depths are compared and the intersection angles are almost the same.

Garden 9] This figure shows conventional cutting scissors opened 15 degrees.

FIG. 10 is a view in which the cutting scissors of FIG. 9 are closed.

FIG. 11 is a view of another conventional cutting scissors.

[FIG. 12] This is a view in which the cutting scissors of FIG. 9 are opened 15 degrees.

FIG. 13 is a diagram for explaining that the curved concave portion on the back of the blade has an inner cylindrical shape.

Garden 14] This figure explains the curved concave portion provided on the back of the blade and its generatrix, and also explains the surfaces B and C that come into contact with the other blade body.

Garden 15] This figure is a diagram for explaining the process of grinding the back of the blade with a disk grindstone to form a curved concave portion having a cylindrical inner surface.

Garden 16] This figure explains that when the cutting edge line is provided so as to retreat, the opening depth of the cutting scissors becomes deeper even when the opening angle of the cutting scissors is the same.

Garden 17] This figure illustrates that the cutting scissors have a smaller angle of intersection as the intersection between the cutting edge and the cutting edge is closer to the tip.

Garden 18] This figure is a diagram for explaining that when the cutting edge line of the cutting scissors is convex, the intersection angle near the tip of the scissors increases.

Garden 19] This figure is a diagram for explaining that when the cutting edge line retreats, the concave portion on the back of the blade must also retreat.

Explanation of symbols

1 cutting shears

10 Moving blade as one blade

20 Static blade as the other blade

11, 21 Blade

12, 22 Pattern B

13, 23 height

14, 24 pivot part 15, 25 Blade end

18a First recess

18b Second recess

26 recess

27 Screw hole

28 Periphery of curved recess

29 Contact surface

A Tip line of one blade (moving blade)

B Edge line of the other blade (static blade)

K busbar

Ka 1st bus

Kb second bus

La, Lb center line

Ma, Mb contact line

P Intersection point between edge lines

Q pivot point

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 12 and 13, the cutting scissors 1 of this embodiment pivotally connect two blades (a moving blade 10 and a static blade 20) having blade portions 11, 21 and handle portions 12, 22. It is a cut scissors for hairdressing and beauty.

As shown in FIG. 3, the moving blade 10, which is one of the blades, is formed such that the blade tip line A connects the blade tip and the pivot shaft. Accordingly, the blade tip line A is a line that is retracted toward the back 13 side from the blade side end portion 15 of the blade body width of the pivot portion 14. Further, as shown in FIG. 4 in which only the outline of the scissors is seen through, the cutting edge line A is close to the center line La so as to be substantially overlapped therewith.

[0027] In addition, a stepped portion 16 is provided at a connecting portion between the pivot portion 14 and the blade portion 11, and the blade portion 11 itself is retracted to the back 13 side by about half of the blade width of the pivot portion 14. It has become. In other words, the back of one blade is retracted by an amount corresponding to the retraction of the cutting edge line. Also, on the back 13 side, the boundary portion with the pivot portion 14 is a projection 17 via a concave curved shape. , Has a unique design.

[0028] The cutting edge line B of the stationary blade 20, which is the other blade, is formed as a line connecting the blade tip and the vicinity of the blade-side end 25 of the pivoting portion 24 as shown in FIG. ing. Further, an intermediate portion Z of the cutting edge line B is formed in a bulged shape so as to follow the retreat of the cutting edge line A of the moving blade 10. Specifically, it protrudes by 2. Omm from the straight line connecting both ends of the cutting edge line. As a result, one cutting edge line A has a shape approximating a straight line, and the other cutting edge line B has a shape that is more bulged than the retreating one cutting edge line A. Shape is different.

In addition, the cutting scissors of this embodiment have a large retreat of one cutting edge line, but if the retraction is not so large as in this example, the amount of protrusion due to swelling is about 1.8 mm or 1.6 mm. There may be.

[0029] As described above, in the stationary blade 20, which is the other blade, the blade edge line B from the base end X to the distal end Y of the blade 21 is formed to be convexly curved. And near the base end X, the cutting edge line B is almost parallel to the center line Lb, and as the cutting edge line B approaches the tip end Y, the cutting edge line B gradually curves toward the back 23 side. Further, the shape of the stationary blade 20 from the base end X to the distal end Y of the back 23 is formed in a concave shape substantially along the convex shape of the cutting edge line B.

FIG. 5 shows the back of the other blade 20 when the cutting scissors are disassembled. A curved concave portion 26 is provided on the back of the blade of the other blade body 20, and the bus bar K at the lowest position of the concave portion 26 starts from the pivot portion 24 through the screw hole 27, and the cutting edge line B A concave portion 26 is formed while drawing a generating line K parallel to. Specifically, the grinding is performed with a disk grindstone 300 as shown in FIG. 15, and the vertex 301 is moved on the bus K.

However, this bus line K actually separates slightly from the cutting edge line B as it approaches the tip Y, so it is not exactly parallel. When the bus bar K is separated from the cutting edge line B in this way, when the two blades are pivotally connected, the more the tip Y becomes, the more the cutting edge is curved toward the mating blade side, and the two blades are This is because the cutting edges are pressed against each other, so that a side pressure is easily obtained, and as a result, the scissors are in a good condition for cutting.

Also, when addressing the pivot portion 24, the disk grinding wheel 300, which is separated from the back of the blade, is moved closer to the next while moving, so that the peripheral edge 28 of the curved concave portion becomes semicircular as shown in FIG. Two A contact surface 29 that comes into contact with the counterpart blade body is provided around 8.

FIG. 6 shows the blade back of one blade body 10 when disassembled. The blade back has a first recess 18a and a second recess 18b.

The first concave portion 18a is provided in the pivot portion 14 centered on the screw hole, and the first generatrix _Ka is aligned in the longitudinal direction of the blade portion. The periphery of the first recess 18a is also semicircular, and the contact surface 19 formed around the periphery is in contact with the contact surface 29 of the mating blade body 20.

The second concave portion 18b starts from the base end X of the blade portion adjacent to the first concave portion 18a, and the second generatrix Kb is retracted to the back side 13 from the first generatrix Ka. It is started from the position. Then, the distance from the edge line A starts at a distance D that is half the width of the base end X, and the edge line A force is also extended slightly apart, and is drawn so as to pass through the dorsal side 13. Therefore, the second concave portion 18b is formed in a curved concave portion having the arrangement and the shape according to the second generatrix Kb.

When the cutting scissors 1 are opened, as shown in FIG. 7 (a), when the handle portions 12, 22 are opened 15 degrees, the depth of the cutting scissors 1 becomes W1. Compare this with the depth W2 when the cutting scissors 100 shown in the prior art were also opened by 15 degrees, as shown in FIG. 7 (b), the shear force of the cutting scissors 1 of the embodiment, the blade portion 11 and the cutting edge line. The depth W1 is widened by the amount corresponding to the retreat of A.

Therefore, when cutting hair, the depth of the opened scissors 1 becomes relatively deep even if the angle of opening the handle portions 12 and 22 of the cutting scissors 1 is relatively small. Even with a small amount of movement, the scissors can be opened to the required depth, and as a result, the burden on the hairdresser is reduced.

When the opening angle of the scissors 1 is set to 5 degrees and the vicinity of the tip of the scissors 1 is used, the intersection angle Θ as shown in FIG. 8A is obtained. This Θ is almost the same as the intersection angle 交 of the scissors shown in Fig. 8 (b).

1 1 2

In other words, the intersection angle near the tip Y of the cutting edge is secured at an intersection angle that is suitable for cutting hair without becoming too small. This is because the cutting edge line B of the stationary blade 20 is warped toward the back 23 near the tip Y, that is, the convex shape of the cutting edge line B of the stationary blade 20.

Therefore, even when cutting hair with the tip of the scissors, the hair can be cut smoothly and not slippery In this case, the hair can be cut smoothly without closing resistance.

Further, as described above, the blade edge line of one blade body is retreated, but the curved concave portion on the back of the blade is provided by retreating the second generatrix. The hair can be reliably cut.

Claims

The scope of the claims

[1] This is a cutting scissors for beauty and beauty that has two blades pivoted together.

It is formed so as to pass through the tip of the blade body and a position retracted from the blade side end of the pivot portion of the blade body, so that a line retreated to the back side of the blade body from the blade side end is formed. While being formed, the cutting edge line of the other blade body is formed in a shape in which an intermediate portion of the cutting edge line bulges so as to follow the retreat of the cutting edge line of the one blade body,

On the back of the two blades, a curved concave part that forms an inner surface of a cylinder is provided on the back of the blade in a direction in which the cylinder is in the longitudinal direction of the blade.

The concave portion of the one blade body is formed by a first generatrix provided so that a generatrix drawn at the bottom of the concave portion passes through a screw hole for pivoting provided in the pivotal portion. Of the recess,

At the base end of the blade portion, a second recess formed by a second busbar formed so as to start the position force retracted to the back side of the first busbar.

Cut scissors characterized by having.

[2] The cutting scissors according to claim 1, wherein the edge line of one of the blades is formed so as to pass through the tip of the blade and the pivot shaft.

[3] The cutting scissors according to claim 1 or 2, wherein the back of one blade body is retracted by an amount corresponding to the retraction of the cutting edge line.