JP6362943B2 - scissors - Google Patents

Description

  The present invention relates to a bag.

Amber has been used in various scenes since ancient times. For example, it is used in various scenes such as offices and homes. In addition, there is no time to enumerate the use of the bag for office use, cooking, sewing, barber / beauty, etc.
The scissors are generally configured by connecting two housings with a connecting member so as to be rotatable with respect to each other. Each housing includes a blade portion on the distal end side having a blade along the inner side, a gripping portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion. The connection of the two casings by the above-described connecting member is performed at the connecting portion of both the casings, so that the casings can rotate with respect to each other about the connecting member. The user inserts a finger into both arm portions of the two casings, and rotates the angle of the two casings so as to change the angle from a large state to a small state. The object which is the object to be cut between the blades can be cut.

  The essential function of a kite is to cut the object, but considering that there are women and children among the users of the kite, there is a demand for kites that can reliably cut the target using the kite. Is expensive.

  The applicant of the present application has developed a kite that maintains a certain angle range at all times during the transition from the open state to the closed state, and has filed a patent application for such an invention. (Patent Document 1). This scissors are obtained by giving the blades of each housing a curve that swells in the direction of the inside of the housing (the side where the blade exists) (in this application, such a scissors curved so as to swell inside the housing). The blade is called a “curve blade”), and the depression angle is kept within a certain range at all points during the transition from the open state to the closed state.

JP 2013-240399 A

The scissors having the curved blades as described above can surely and lightly cut the object as compared with the case where the blades of each housing have a straight shape.
However, as a result of the inventor's continuing research on this bag in order to find further improvements, the following two problems have been found.

First, there is a problem that the force required by the user when cutting the object increases when the object is to be cut near the tip of the heel.
As is clear from lever and force balance, the gripping portion is considered to be the lever's power point, the connecting member is the lever's fulcrum, and the portion of the blade that is cutting right now is considered to be the lever's point of action. In this case, the reason that the portion of the blade portion that is the point of action that is just cutting is farther from the connecting member that is the fulcrum, the greater the force is required at the gripping portion that is the power point operated by the user. Arise from.
For example, since the tip of the blade portion is about twice the distance from the linking member as the fulcrum, assuming that the force applied by the user to the gripping portion, which is the power point, is the same, the blade portion is the object to be cut. The applied force is about ½.
For this reason, when the object is cut near the front end of the housing, the force required to cut the object is larger than when the object is cut near the base end from the connecting member.

Secondly, the gap between the two blade portions tends to increase as the distance from the connecting member increases due to the structure of the ridge, so when an object is to be cut near the tip of the blade portion, This is a problem that the phenomenon that the object enters (or the object is caught between the blades) is likely to occur.
In order to prevent the phenomenon that the object enters between the blades of the housing, for example, it is conceivable to tighten the connecting portions of the two housings more firmly with the connecting member. Friction is increased, and a stronger force is required for the opening and closing operation of the bag.

  The present invention solves the above-mentioned two problems, that is, when a scissors having a curved blade that can cut an object lightly is cut near the tip of the blade of the housing, the object is cut lighter. The object is to improve so that the object can hardly enter between the two blade portions.

The invention of the present application includes a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion. And a connecting member for caulking the two casings to each other at the connecting portions of the respective casings, and the blade provided on the blade portion is a curve that bulges toward the inside thereof. It is a ridge that is a curved blade having
And the depression angle, which is the angle formed by the tangents of the two blades at the contact point when the two blades in the saddle are in contact, is 2 in the proximal zone that is a predetermined range from the connecting portion side of the blades. The time when the two blades are in contact with each other in the distal end zone which is the range on the distal end side of the proximal end zone of the blades is larger than when the two blades are in contact with each other.
When an object is to be cut near the tip of the blade portion of the housing, as described above, the lever ratio is deteriorated, so that the force required for the user to operate the grip portion increases. And there is no room for improvement in the structure of the kite for the problem with the lever ratio. Therefore, the applicant of the present application considered that the object can be cut with a light force by an approach different from the improvement of the lever ratio. It is an approach that focuses on depression. The angle formed by the tangents of the two blades at the point of contact between the two blades in the heel is the heel angle referred to in this application. When the heel angle is small, when the two skeletons are rotated relative to each other by the same angle. The amount of contact between the object and the blade is larger than when the depression angle is large. This means that the housing receives a large drag from the object, and increases the force required for the user to operate the grip portion. On the other hand, if the depression angle is increased, the force required for the user to operate the grip portion can be reduced.
The depression angle in the scissors according to the present invention is a range closer to the tip side than the base end zone of the blade than when two blades contact each other in the base end zone which is a predetermined range from the connecting portion side of the blade. When the two blades are in contact with each other in the tip zone, the size is increased. In other words, roughly speaking, the blade of the scissors of the present invention is a curved blade as a whole, but the object near the tip of the blade is more than the included angle when cutting the object near the base end of the blade. The blade portion is configured so that the depression angle when cutting is larger. Thus, by making the depression angle when cutting the object in the tip zone where the lever ratio is worse than that of the proximal zone larger than the depression angle when cutting the object in the proximal zone, When cutting an object near the tip of the body blade, the object can be cut lighter.
In addition, by reducing the force required when cutting the object in the tip zone in this way, the drag exerted on the object by the blade is also reduced, so that the object can be prevented from entering between the two blades. .

The tip zone in the scissors of the present application is divided into a first tip zone from the base end and a second tip zone from the tip, and the angle of depression is such that the two blades are in contact with each other in the first tip zone. It may be larger than when the two blades are in contact with each other in the second tip zone.
By doing so, it becomes possible to further increase the depression angle when cutting the object in the second tip zone where the lever ratio is particularly poor.

In the scissors of the present application, as described above, the included angle when the two blades contact with each other in the proximal zone is smaller than the included angle when the two blades contact with each other in the distal end zone.
The depression angle when the two blades are in contact with each other in the proximal zone can be, for example, between 20 ° and 35 °. Considering the lever ratio, if the depression angle when the two blades are in contact with each other in the proximal zone is within this range, the object can be cut lightly when cutting the object in the proximal zone. At the same time, it is easy to prevent the object from entering between the two blades.
The depression angle when the two blades are in contact with each other in the tip zone can be, for example, between 25 ° and 45 °. Considering the lever ratio, if the included angle when the two blades are in contact with each other in the tip zone is within this range, the object can be cut slightly lightly when cutting the object in the tip zone. Moreover, it can suppress that a target object enters between blade parts. However, it is possible to make the depression angle in the tip zone larger than 45 °, and such an effect can be expected more effectively to cut the object lightly and to suppress the object from entering between the blades. It becomes like this. Not limited to this, the applicant of the present application proposes the included angle that can be adopted for the tip zone as described above, because the design of the blade, particularly the blade, is impaired if the included angle in the tip zone becomes too large. It is. That is, the range of the above-described depression angle is compatible with both the design of the heel and the effect of lightly cutting the object and the effect of suppressing the object from entering between the blades when the lever ratio is taken into account. Range.
The depression angle in the distal zone can be in the range of 25 ° to 45 °, and overlaps with the depression angle of 20 ° to 35 °, which can be adopted in the proximal zone, but in the distal zone rather than the depression angle in the proximal zone. The condition that the depression angle is larger and the condition that both the depression angle in the distal end zone and the depression angle in the proximal end zone are within the above numerical range can be compatible with each other without contradiction.
When the tip zone is divided into a first tip zone and a second tip zone, the included angle when the two blades are in contact with each other in the first tip zone can be between 25 ° and 38 °, and The depression angle when the two blades are in contact with each other in the second tip zone may be between 38 ° and 45 °. Considering the lever ratio, if the included angle when the two blades are in contact with each other in the tip zone is within this range, the object can be cut slightly lightly when cutting the object in the tip zone. Moreover, it can suppress that a target object enters between blade parts.

As described above, the proximal zone is present on the proximal side near the connecting member among the blades of the blade portion. Although not limited to this, the proximal zone is from a position of 70% to 75% on the distal end side of the length of the housing from the connecting member to the distal end of the housing. As long as it occupies the base end of the blade portion of the housing. To that extent, it is easy to lightly cut the object, and the phenomenon that the object enters between the blades of the two housings is less likely to occur.
Of the blade, the remainder of the proximal end zone becomes the distal end zone. When the tip zone is divided into a first tip zone and a second tip zone, the first tip zone occupies 50% to 60% of the tip zone in the length direction of the casing. Also good. By dividing the tip zone into the first tip zone and the second tip zone at such a ratio, the object can be cut lightly to some extent, and the effect of suppressing the entry of the object between the blade portions can be achieved. It becomes easy to obtain.

The depression angle when the two blades are in contact with each other in the proximal zone may or may not be constant regardless of where in the proximal zone the two blades are in contact.
The depression angle when the two blades are in contact with each other in the tip zone may or may not be constant regardless of where in the tip zone the two blades are in contact.
When the tip zone is divided into a first tip zone and a second tip zone, the depression angle when the two blades are in contact with each other in the first tip zone is where the two blades are in contact with each other in the first tip zone Regardless, it may be constant or not.
The depression angle when the two blades are in contact with each other in the second tip zone may or may not be constant regardless of where in the second tip zone the two blades are in contact.
A saddle in which the included angle when two blades contact in the proximal zone is constant regardless of where the two blades contact in the proximal zone is relatively easy to design. The same applies to the other cases, that is, when the tip zone and the tip zone are divided into the first tip zone and the second tip zone.
The shape of the blade in the proximal zone may be a logarithmic spiral. In addition, the shape of the blade in the tip zone may be a logarithmic spiral. When the tip zone is divided into the first tip zone and the second tip zone, the shape of the blades in the first tip zone and the second tip zone may be a logarithmic spiral. If a logarithmic spiral is used, the angle of depression when two blades are in contact with each other in a certain range of the base end zone and the front end zone (if the front end zone is divided into the first front end zone and the second front end zone) is always constant It is easy to design so that

The top view which shows the closed state of the housing of the collar by 1st Embodiment. The top view which shows the state which the housing of the cage | basket shown in FIG. 1 opened about 35 degrees. The top view which shows the state which the housing of the ridge shown in FIG. 1 opened about 13 degrees. The top view which shows the state which the housing of the ridge shown in FIG. 1 opened about 8 degrees. FIG. 2 is a side view of the casing of the bag shown in FIG. 1. The graph of the logarithmic spiral employ | adopted as a shape of the scissors blade shown in FIG.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

  1 to 4 show a bag according to this embodiment. 1 to 4 are all plan views, FIG. 1 is a state in which two casings to be described later are closed, and FIG. 2 is a state where the casing is opened from the state shown in FIG. 1 (hereinafter the same) to about 35 °. FIG. 3 shows a state in which the housing is opened to about 13 °, and FIG. 4 shows a state in which the housing is opened to about 8 °.

The cage has two enclosures 100.
Both housings 100 each have a blade portion 110 on the distal end side, a connecting portion 120 in the middle thereof, and an arm portion 130 on the proximal end side.
The two housings 100 are connected to each other by a connecting member 200 at the connecting portion 120 so as to be rotatable. As a method for connecting the connecting portions 120 of the two casings 100 by the connecting member 200, any known or well-known technique such as caulking or screwing may be employed, and the description thereof is omitted.

The blade part 110 is made of metal, for example, and has a plate shape. A blade 111 is provided inside the blade portion 110. The blade 111 is provided over substantially the entire length of the blade portion 110. The blade 111 in the housing 100 located on the near side in FIGS. 1 to 3 is formed by reducing the thickness of the blade portion 110 from the outside toward the inside. The blade 111 in the housing 100 located on the back side in FIGS. 1 to 3 is also formed in the same manner, although illustration in each drawing is omitted.
The connecting part 120 is a plate-like body that connects the blade part 110 and the arm part 130. The connecting part 120 is a connecting member 200, and a certain area is given so that the connecting parts 120 of the two casings 100 can be connected to each other. The connecting portions 120 in the two housings 100 abut the back side surfaces, which are surfaces facing each other, at least partially in contact with each other. Although the part which the two connection parts 120 contact | abut mutually is not restricted to this, it is planar shape in this embodiment. The two casings 100 can rotate with each other in a stable state without causing backlash by sliding the back surfaces of the two connecting portions 120 to each other.
Each arm 130 is provided with, for example, a ring-shaped handle 131 for the user to grip the heel when the heel is used by the user. The user's thumb is usually passed through one handle 131, and the user's index finger and middle finger are usually passed through the other handle 131. The handle 131 has a convenient size and shape. The two handles 131 in this embodiment are the same, but this is not necessarily the case.
In addition, the blade part 110 and the connection part 120 of the housing 100 are integral. The arm part 130 may also be integrated with the connecting part 120, but this need not be the case. For example, members that are connected to the blade portion 110 and the connecting portion 120 reach the inside of the handle 131 of the arm portion 130, and a member that is not shown in the drawing reaching the inside of the handle 131, for example, a handle 131 made of resin, rubber, or the like. May be attached.

  The blades 111 provided on the two blade portions 110 are both given a curved shape that swells inward. That is, the blades 111 provided on the two blade portions 110 are both so-called curved blades.

The shape of the curve given to the blade 111 will be described in detail below with reference to FIG.
The blade 111 forms a series of curves as a whole. However, as shown in FIG. 5, the base end zone 140 within a predetermined range from the connecting portion 120 from the base end of the blade portion 110, and the blade It is divided into a distal zone 150 from the distal end rather than a proximal zone 140 of the portion 110. In this embodiment, although not necessarily limited thereto, the distal end zone 150 is divided into a first distal end zone 151 from the proximal end and a second distal end zone 152 from the distal end.
The proximal zone 140 is not necessarily limited to this, but in this embodiment, from the connecting member 200 in the housing 100 (more precisely, from the center of the axis of rotation of the connecting member 200) to the distal end of the housing 100. Occupies from the position up to 70% to 75% (but not limited to 75% in this embodiment) on the distal end side to the base end of the blade 110. . The distal end side of the proximal end zone 140 is the distal end zone 150.
In addition, the first tip zone 151 is not necessarily limited to this, but in this embodiment, 50% to 60% (not limited to) of the tip zone 150 in the length direction of the housing 100 is considered. However, in this embodiment, it is 60%).
Although not limited to this, the curves given to the two blades 111 in this embodiment have a mirror image relationship.

The curve given to the proximal end zone 140 and the curve given to the distal end zone 150 are based on the depression angle formed by the tangents of the two blades at the contact point when the two blades 111 of the two housings 100 contact each other. The depression angle when the blade 111 contacts the end zone 140 is smaller than the depression angle when the blade 111 contacts the tip zone 150.
In the scissors of this embodiment, the scissor angle when the two blades 111 are in contact with each other in the proximal zone 140 is set to be between 20 ° and 35 °. This numerical value is preferably in the range of about 30 ° ± 2 °, for example. Although not necessarily limited to this, in the scissors of this embodiment, the slant angle when the two blades 111 are in contact with each other in the proximal zone 140 is a constant angle between 20 ° and 35 °. It can be designed as follows.
A logarithmic spiral obtained by using the following mathematical expression (Formula 1) of polar coordinate display is known. If the curve given to the blade 111 in the base end zone 140 is made to follow a logarithmic spiral, the depression angle when the two blades 111 are in contact with each other in the base end zone 140 is always a constant angle.
[Equation 1]
r = ae ^kθ
Here, a is a constant. Although k is also a constant, k determines a depression angle when the two blades 111 are in contact with each other in the proximal zone 140. For example, if it is desired to set the depression angle to 30 °, the depression angle formed between the two blades 111 may be set to 15 °, assuming that the two blades 111 are responsible for half of them. It is obtained by substituting a value of 15 ° into θ in (Equation 2).
[Equation 2]
k = 1 / tanθ
FIG. 6 shows a logarithmic spiral created by substituting k obtained as described above into the mathematical formula 1 and selecting a proper positive number a. Note that the value of a is such that r = a when θ is 0. That is, by appropriately determining the value of a, the position of the starting line of the logarithmic spiral is determined. This means that the curve shape of the cutting edge can be determined as desired by appropriately selecting the value of a.

  In the logarithmic spiral of FIG. 6 in which the width direction of the blade portion 110 is the x-axis direction and the length direction of the blade portion 110 is the y-axis direction, the lower end (the position of the origin) is the axis of rotation of the connecting member 200 in the heel. And the upper end intersecting with the y-axis coincides with the tip of the blade 111 of the casing 100. By designing such that the curve of the base end zone 140 of the blade 111 matches the logarithmic spiral shown in FIG. 6 so as to satisfy the condition, the depression angle when the two blades 111 are in contact with each other in the base end zone 140 is obtained. It will always be 30 °.

Moreover, in the scissors of this embodiment, the included angle when the two blades 111 are in contact with each other in the distal end zone 150 is between 25 ° and 45 °, and the included angle when the two blades 111 are in contact with each other in the proximal zone 140 Is also getting bigger. When the tip zone 150 is not divided into the first tip zone 151 and the second tip zone 152, the depression angle when the two blades 111 are in contact with each other in the tip zone 150 is not limited to this, but is 25 ° to 45 °. It is possible to make a certain angle between. When the tip zone 150 is not divided into the first tip zone 151 and the second tip zone 152, this value is preferably 35 ° or more, for example.
The curve to be given to the blade 111 in the distal zone 150 can be determined by the same method as described above in which the curve to be given to the blade 111 in the proximal zone 140 is determined.
For example, if the depression angle when the two blades 111 are in contact with each other in the tip zone 150 is always set to 40 °, it can be obtained by substituting 20 °, which is half of 40 °, into θ in the above formula 2. Substituting k and an appropriate positive number a into the above mathematical formula 1, a logarithmic spiral similar to that shown in FIG. 6 is obtained. By adopting the curve as the shape of the blade 111 in the tip zone 150, the shape of the blade 111 in the tip zone 150 is such that the depression angle when the two blades 111 contact each other in the tip zone 150 always maintains 40 °. Become. In this case, the value of a is determined so that the joint between the most distal blade 111 of the proximal zone 140 and the most proximal blade 111 of the distal zone 150 is smoothly connected.

However, in the bag of this embodiment, the tip zone 150 is divided into a first tip zone 151 and a second tip zone 152. In this case, the curves given to the blades 111 of the first tip zone 151 and the second tip zone 152 may be as follows. Note that the depression angle in the second tip zone 152 is always larger than the depression angle in the first tip zone 151 in the heel of this embodiment, and the depression angle in the first tip zone 151 and the depression angle in the second tip zone 152 are It is made larger than the depression angle in the base end zone 140.
Although not limited to this, the curve given to the blade 111 of the first tip zone 151 in this embodiment is such that the depression angle when the two blades 111 contact each other in the first tip zone 151 is between 25 ° and 38 °. In addition, the angle is larger than the depression angle when the two blades 111 are in contact with each other in the proximal zone 140. Further, the depression angle when the two blades 111 are in contact with each other in the first tip zone 151 is not limited to this, but may be a constant angle between 25 ° and 38 °.
The curve to be given to the blade 111 in the first distal end zone 151 can be determined by the same method as described above in which the curve to be given to the blade 111 in the proximal end zone 140 is determined.
For example, if the depression angle when the two blades 111 are in contact with each other in the first tip zone 151 is always set to 35 °, 17.5 °, which is half of 35 °, is substituted for θ in the above formula 2. 6 obtained by substituting k obtained in this way and a determined by the same method as described in the case of obtaining the logarithmic spiral of the tip zone 150 into the above equation 1, and similar to that shown in FIG. Get the logarithmic spiral of. By adopting the curve as the shape of the blade 111 in the first tip zone 151, the shape of the blade 111 in the first tip zone 151 is such that the depression angle when the two blades 111 contact each other in the first tip zone 151 is always It will keep 35 °. In this case, the value of a is determined so that the joint between the most distal blade 111 of the proximal zone 140 and the most proximal blade 111 of the first distal zone 151 is smoothly connected.
Although not limited to this, the curve given to the blade 111 of the second tip zone 152 in this embodiment is such that the depression angle when the two blades 111 contact each other in the second tip zone 152 is between 38 ° and 45 °. It is supposed to be. In addition, the depression angle when the two blades 111 are in contact with each other in the second tip zone 152 is not limited to this, but can be a constant angle between 38 ° and 45 °.
The curve to be given to the blade 111 in the second distal zone 152 can be determined by the same method as described above in which the curve to be given to the blade 111 in the proximal zone 140 is determined.
For example, if the depression angle when the two blades 111 are in contact with each other in the second tip zone 152 is always set to 40 °, 20 °, which is half of 40 °, is substituted for θ in the above formula 2. Substituting the obtained k and a determined by the same method as described in the case of obtaining the logarithmic spiral of the tip zone 150 into the above mathematical formula 1, the same logarithm as shown in FIG. Get a spiral. By adopting the curve as the shape of the blade 111 in the second tip zone 152, the shape of the blade 111 in the second tip zone 152 is such that the depression angle when the two blades 111 contact each other in the second tip zone 152 is always It will keep 40 °. In this case, the value of a is determined so that the joint of the most distal blade 111 of the first distal zone 151 and the most proximal blade 111 of the second distal zone 152 is smoothly connected.

A method of using the bag of this embodiment configured as described above and its operation will be described.
As in the case of a normal scissors, this scissors are used by a user passing a finger through the handle of the arm unit 130 and rotating the two scissors 100 around the connecting member 200. At this time, the object to be cut is placed between the two blades 110 in the open state, and the two blades 110 are in the state shown in FIG. 1 so that the two blades 110 overlap each other. Before the closing, the object is cut with the blade 111 existing in the blade portion 110.
At this time, since the above-described curve is given to the blade 111 of the blade portion 110, when the two blades 111 are in contact with each other in the proximal zone 140 (for example, the state shown in FIG. 2), the depression angle is always 30 °. At this time, the object can be cut lightly, and the object can be prevented from being caught between the blade portions 110.
Further, when the two blades 111 are in contact with each other in the first tip zone 151 (for example, the state shown in FIG. 3), the depression angle is always 35 °. Is in contact with each other (for example, in the state shown in FIG. 4), the depression angle is always 40 °, and in any case, the depression angle is the depression angle when the two blades 111 are in contact with each other in the proximal zone 140. Is bigger than. Since the depression angle increases as the leverage ratio gets worse, the object can be cut lightly in the tip zone 150, and the object can be prevented from being caught between the blade portions 110. . However, since the depression angle in the tip zone 150 is not excessively large, the design of the ridge is not impaired.

Next, a modified example of the bag according to the above-described embodiment will be described. The variation of the kite is basically the same as the kite described above.
The only difference between the scissors according to the modification and the scissors described in the above embodiment is only the shape of the curve provided to the blade 111 of the blade portion 110.
The curve given to the scissors blade 111 according to the modified example is a saddle angle between the time when the two blades 111 are in contact with each other at the most proximal portion and the time when the two blades 111 are in contact with the most distal portion. However, it is a depression that gradually increases. However, there are two angles of depression in the heel in the above-described proximal zone 140 and the distal zone 150 (in the case where the distal zone 150 is divided into the first distal zone 151 and the second distal zone 152, respectively). The depression angle when the blade 111 is in contact with the blade 111 satisfies the size of the angle to be satisfied. The angle of depression in this modification is, for example, between 20 ° and 30 ° when the two blades are in contact with the most proximal portion, and the angle when the two blades are in contact with the most distal portion. May be between 30 ° and 45 °.
Note that the depression angle in this collar does not need to increase in proportion to the distance in the length direction of the casing 100 from the axis of rotation of the caulking member 200 to the portion where the two blades 111 are in contact. It may be one that increases rapidly near the tip of the housing 100.

  The usage method and operation of the modified kite are the same as the usage method and operation of the kite of the above-described embodiment.

DESCRIPTION OF SYMBOLS 100 Housing body 110 Blade part 111 Blade 120 Connecting part 130 Arm part 131 Handle 140 Base end zone 150 Front end zone 151 First front end zone 152 Second front end zone

Claims (12)

Two housings each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion; ,
A connecting member for caulking the two casings to each other at the connecting portion of each casing;
With
The blade provided in the blade portion is a curved blade having a curve that swells inward.
鋏
The depression angle, which is the angle formed by the tangents of the two blades at the contact point when the two blades are in contact, is in contact with the two blades in a proximal zone that is a predetermined range from the connecting portion side of the blades. than when being adapted to it is increased when the two said blades at the tip zone is in the range of the distal end side of the proximal end zone is in contact of said blade,
The base end zone has a length of 70% to 75% on the distal end side of the length from the connecting member to the distal end of the housing in the housing, from the position of the blade portion of the housing. It occupies up to the base,
The tip zone is divided into a first tip zone from its proximal end and a second tip zone from its tip,
The depression angle is larger when the two blades are in contact with each other in the second tip zone than when the two blades are in contact with each other in the first tip zone,
The first tip zone is configured to occupy 50% to 60% of the tip zone in the length direction of the housing,
The depression angle when the two blades contact with each other in the first tip zone is between 25 ° and 38 °,
The included angle when the two blades are in contact with each other in the second tip zone is between 38 ° and 45 °.
scissors. Two housings each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion; ,
A connecting member for caulking the two casings to each other at the connecting portion of each casing;
With
The blade provided in the blade portion is a curved blade having a curve that swells inward.
鋏
The depression angle, which is the angle formed by the tangents of the two blades at the contact point when the two blades are in contact, is in contact with the two blades in a proximal zone that is a predetermined range from the connecting portion side of the blades. than when being adapted to it is increased when the two said blades at the tip zone is in the range of the distal end side of the proximal end zone is in contact of said blade,
The base end zone has a length of 70% to 75% on the distal end side of the length from the connecting member to the distal end of the housing in the housing, from the position of the blade portion of the housing. It occupies up to the base,
The depression angle when the two blades are in contact with each other in the tip zone is constant regardless of where in the tip zone the two blades are in contact,
scissors. Two housings each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion; ,
A connecting member for caulking the two casings to each other at the connecting portion of each casing;
With
The blade provided in the blade portion is a curved blade having a curve that swells inward.
鋏
The depression angle, which is the angle formed by the tangents of the two blades at the contact point when the two blades are in contact, is in contact with the two blades in a proximal zone that is a predetermined range from the connecting portion side of the blades. than when being adapted to it is increased when the two said blades at the tip zone is in the range of the distal end side of the proximal end zone is in contact of said blade,
The base end zone has a length of 70% to 75% on the distal end side of the length from the connecting member to the distal end of the housing in the housing, from the position of the blade portion of the housing. It occupies up to the base,
The tip zone is divided into a first tip zone from its proximal end and a second tip zone from its tip,
The depression angle is larger when the two blades are in contact with each other in the second tip zone than when the two blades are in contact with each other in the first tip zone,
The first tip zone is configured to occupy 50% to 60% of the tip zone in the length direction of the housing,
The depression angle when the two blades are in contact with each other in the first tip zone is constant regardless of where in the first tip zone the two blades are in contact,
The depression angle when the two blades contact in the second tip zone is constant regardless of where in the second tip zone the two blades touch.
scissors. Two housings each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side having a handle, and a connecting portion positioned between the blade portion and the arm portion; ,
A connecting member for caulking the two casings to each other at the connecting portion of each casing;
With
The blade provided in the blade portion is a curved blade having a curve that swells inward.
鋏
The depression angle, which is the angle formed by the tangents of the two blades at the contact point when the two blades are in contact, is in contact with the two blades in a proximal zone that is a predetermined range from the connecting portion side of the blades. than when being adapted to it is increased when the two said blades at the tip zone is in the range of the distal end side of the proximal end zone is in contact of said blade,
The base end zone has a length of 70% to 75% on the distal end side of the length from the connecting member to the distal end of the housing in the housing, from the position of the blade portion of the housing. It occupies up to the base,
The depression angle gradually increases as the positions where the two blades come in contact with the tip of the housing, both when the two blades come into contact with each other in the proximal zone and when the two blades make contact with each other in the distal zone. It looks like
scissors. The tip zone is divided into a first tip zone from its proximal end and a second tip zone from its tip,
The Chelicerata, rather than when the two said blades contacting at said first distal zone, and so increases towards when two of said blade contact at the second distal end zone,
The first tip zone is configured to occupy 50% to 60% of the tip zone in the length direction of the housing .
The bag according to claim 2 or 4 . The depression angle when the two blades meet in the proximal zone is between 20 ° and 35 °.
The bag according to any one of claims 2 to 4 . The depression angle when the two blades meet in the tip zone is between 25 ° and 45 °.
The bag according to any one of claims 2 to 4 . The depression angle at which the two blades meet in the proximal zone is constant regardless of where in the proximal zone the two blades meet.
The bag according to any one of claims 1 to 3 . The depression angle when the two blades are in contact with each other in the first tip zone is constant regardless of where in the first tip zone the two blades are in contact,
The depression angle when the two blades contact in the second tip zone is constant regardless of where in the second tip zone the two blades touch.
The bag according to claim 1 . The depression angle gradually increases as the positions where the two blades come in contact with the tip of the housing, both when the two blades come into contact with each other in the proximal zone and when the two blades make contact with each other in the distal zone. It looks like
The bag according to claim 1 . The shape of the blade in the proximal zone is a logarithmic spiral,
The bag according to claim 1 or 2. The shape of the blade in the tip zone is a logarithmic spiral,
The bag according to claim 1 or 2.

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