JP2005198833A - Universal design kitchen knife - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kitchen knife which is easy to use and safe for general people including elderly and handicapped people by making the shape of its handle easy to use for stably applying force to its blade and making the angle of the edge of the blade obtuse in the kitchen knife used mainly in average families. <P>SOLUTION: In order to impart the grip handle of the kitchen knife a shape fitting to the hand, the shape of the grip parts of the thumb and index finger is made so that part from the second joint of the index finger to the vicinity of the root of the index finger may fit to the lateral side of the grip handle. Around the grip, a guard part, a recess part and a grip handle abdominal part are provided, and a back part is provided with a swell, a little finger rest part is formed near the little finger, and a pattern for slippage prevention is formed on both side faces. By forming the tip angle of the blade to be 30° to 55°, occurrence of a blade chip is reduced and safety is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to kitchen knives mainly used in general households, and it is easy to use force in the blade, making it easy to use, and making the edge of the blade obtuse to make it easier for the elderly and the disabled. It is intended to provide a safe kitchen knife that is easy to use for people.

A conventional knife is provided with a pattern substantially along the extended line of the blade's blade. In general, kitchen knives often have straight shapes because of the tendency to emphasize the traditional design of wooden patterns, cost reduction in manufacturing, and the appearance of designs. Also, there are few things that fit the hand when grasped, and it feels like using the hand with the knife. For example, vegetable knives, all-purpose knives, and beef swords are different in how they apply force, so the pattern shape is considered to be different, but the same series and the same shape stand out.

There is a fruit knife (petty knife) that is hung near the base of the handle and has a wide handle, but this part is for the index finger and is not intended to hold this part. In addition, the axis of the handle is the same as the axis of the base part that joins the handle and the blade, or the axis of the handle comes from the ventral side of the handle, and the lower side of the index finger is likely to hit the cutting board when gripped with five fingers. For those used by ordinary households and the elderly, a knife that does not require force on the fingertips and is easy to apply force with a natural grip is desired.

In addition, the sharp edges of the blades have many sharp knives, and the sharpness of the knives increases sharpness, but the younger generation and the elderly who are afraid of sharp knives are increasing. Also, sharp blades are easily chipped. In particular, wooden cutting boards are being shunned in recent years for reasons of hygiene, and there is an increase in chipping caused by hardness, flexibility, etc. depending on the material of the cutting board. For these reasons, it is desired that no chipping occurs. In addition, there are knives and knives that have sharp edges and sharp edges without sharpening, but it is generally impossible to sharpen.

JP 2001-170372 JP 2000-189682 JP 2000-176184 JP 11-207052 JP 8-155153 JP 2001-190864 JP

The handle of a conventional knife has a dimension in which the third joint and the second joint of the forefinger match each other with the thickness of the handle at the position where the index finger and thumb are turned with five fingers. (Approximately 20 to 25 millimeters) When a person cuts food with a knife, he is conscious of cutting in the desired direction. The direction of cutting the ingredients is the direction of the side of the blade, and the side of the blade can always be recognized by matching the side plane of the blade (the direction of the blade) with the direction of the back of the hand and the index finger of the hand. Moreover, when the side plane of the blade, the direction of the back of the hand and the index finger, and the direction of the arm are aligned, it is most easy to put force on the blade.

For this reason, when performing an operation (such as sashimi or cutting soba) as accurately as possible in the target direction, the index finger is often applied to the blade as shown in FIG. In addition, as shown in FIG. 2, when the work requires more force, hold it with five fingers and hold the handle on the side of the sharp blade with the thumb and forefinger, and turn the second and third joints of the forefinger to the side of the blade. Try to match. However, when trying to put force into the blade, the state supported by the index finger and thumb is supported by the thumb next to the third and second joints of the index finger as shown in FIG. It will be in a state of aggregation. The knife handle tries to slide in the direction of the index finger and thumb. The force that pushes the knife down is supported from the side, requiring extra force on the fingertips. In particular, if your hands are wet, it is not only slippery but also dangerous. In addition, when pushing forward, the hand is likely to slip into the blade side, which is highly dangerous.

FIG. 1 shows a conventional general knife, in which a blade 2 and a handle 3 are formed in a straight line, and the index finger 5b is hung on the blade peak 2a. FIG. 2 shows a conventional knife, and shows a state in which the blade 2 and the handle 3 are formed in a straight line and the handle is gripped by five fingers. The side dimension of the front turning part for gripping the thumb and index finger is generally about 20 to 25 mm. FIG. 3 is a cross-sectional view as viewed from the AA direction in FIG. 2. The thumb 5a and the index finger 5b grip the handle grip section 3j, and the handle grip section 3j is pressed inside the vicinity of the third indirect 5f of the index finger 5b. I understand that. In addition, it indicates that the pointing direction 6 indicating the second indirect extension of the back of the hand and the index finger is substantially parallel to the side surface of the grip section 3j.

In the present invention, when the handle of the knife is grasped, the side plane direction of the blade and the direction of the forefinger naturally match, making it easy to cut in the desired direction, and at the base of the thumb and forefinger without requiring excessive force on the fingertip The shape of the handle that is supported and the shape of the handle that is easy to grip when the gripper is gripped with five fingers and that is easy to apply force and that does not slip to the blade side.

Also, the danger of the blade tip coming from an acute angle is avoided by making it easier to apply force to the blade and making the blade tip an obtuse angle. In addition, cuts are made at intervals of about 3 millimeters to facilitate cutting of the fibrous food.

In the first aspect of the present invention, the gripping position of the thumb and forefinger when the handle of the kitchen knife is gripped with five fingers is used as the front turning portion, and the second turn of the forefinger to the vicinity of the base of the forefinger is turned forward. It is the dimension located on the lateral side of the part, the axis of the front turning part is near the blade peak, and it is almost hemispherical in the direction of the ventral side of the handle from the position where the little finger hangs to the end of the handle It is a kitchen knife provided with a convex convex end.

According to a second aspect of the present invention, in the first aspect of the present invention, a hook-shaped convex collar (all or both sides around the collar-shaped convex) is provided on the blade side of the front turning portion of the handle. Or the front turning part of the handle is provided with a concave gripping part (all or both sides), or the heel and gripping part (at least the peak of the convex part and the low point of the concave part) Is a knife with a step of 2 mm or more.

According to a third aspect of the present invention, there is provided a convex belly in which the abdominal portion of the handle is a substantially spherical convex portion or a convex back portion in which the back portion of the handle is a substantially spherical convex portion. Alternatively, a knife having a convex side which is a substantially spherical convex part on both side surfaces of the handle, and provided with a side pattern with anti-slip or design concave or convex pattern on the convex side. And a knife that combines convexity, convexity, convexity, and side patterns.

The present invention of claim 4 is a versatile knife for both vegetables, meat and fish, wherein the blade is a double-edged blade and the blade tip angle is 30 to 55 degrees in the above-mentioned claim 1, claim 2 and claim 3. .

According to a fifth aspect of the present invention, in the first, second, third, and fourth aspects of the present invention, the tip of the blade is provided with notches of about 1 millimeter at intervals of about 3 millimeters.

As described above, the present invention is mainly safe when cooking on a cutting board in a natural manner, and it is easy to put force into the blade, and even when it is wet, it is easy to shake left and right, and it is difficult to slip to the blade side. As well as being a high knife, you can relieve the fear of coming from the sharp angle of the blade by making the blade more obtuse because you can force it into force. In addition, the recent cutting of wooden cutting boards due to hygiene problems reduces the problem of chipping caused by the surface hardness and elasticity of the cutting board, and the use of materials that take hygiene and environmental hormone problems into consideration. It becomes possible to select a better cutting board. For these reasons, it is possible to provide safer kitchen knives that are easy to use for young people, elderly people, and people with disabilities, as well as the spread of cutting boards that take into account hygiene and environmental hormone issues at home and school meals. It is considered a very useful invention that can be promoted.

Hereinafter, embodiments of the universal knife of the present invention will be described in detail with reference to the drawings.
FIG. 4 shows an embodiment of the kitchen knife of the present invention. The kitchen knife 1 is composed of a blade 2 and a handle 3. On the blade 2 side of the handle 3, a front rotating portion axis 3n is placed near the blade peak 2a from the metal fitting axis 2b. The front turn part 3a which has is provided. Further, a convex end 3m having a substantially hemispherical shape is provided in the direction of the approximately belly of the handle from the vicinity of the position where the little finger 3c is applied to the handle 3 to the end of the handle. FIG. 5 shows a state in which the handle 3 of the kitchen knife 1 of FIG. 4 is gripped by the five fingers of the hand 5 and the handle of the knife 1 is gripped.

FIG. 6 shows a view seen from the BB cross-section direction of FIG. 5, showing that the upper part of the grip section 3k hits the base 5g of the index finger 5b, and the pointing direction 6 is substantially parallel to the side surface of the grip section 3k. Show things. The side dimension 3o at this time is about 35 mm for children and about 45 mm for adults. Further, as shown in FIG. 5, the front turning portion 3 a is easy to fit in the hand when the upper portion is inclined about 30 degrees to the right slightly from the right angle. The handle 3 may be hollow with a metal such as stainless steel, plastic or wood may be used, and a weight may be attached to the inside of the handle as a ballast with the blade.

FIG. 7 shows another embodiment of the present invention, in which the abdomen of the handle 3 has a substantially spherical convex part on the handle 3 shown in FIG. 4, and the back part of the handle 3 has a substantially spherical convex part. A convex back 3c is provided.

8A and 8B show another embodiment of the present invention, where FIG. 8A is a plan view and FIG. 8B is a front view. The handle 3 of the knife 1 has a front turning portion 3a, a convex end 3m, a convex belly 3b, a convex back. c is provided on both sides of the handle as a convex side 3i that is a substantially curved convex part, and a non-slip pattern 3h that is provided with a non-slip or design-like concave pattern is provided on the convex side 3i. This knife is provided with a hook-shaped convex collar part 3g on the blade 2 side, and a handle front turning part 3a is provided with a concave gripping concave part 3f.

FIG. 9 shows a state in which the handle 3 of the kitchen knife 1 in FIG. 8 is gripped with five fingers, and the hand 5 is indicated by a one-dot chain line. Further, the anti-slip pattern 3h is omitted. The thumb base 5d indicates the vicinity of the base of the index finger 5b and the thumb 5a, and also indicates that the thumb 5d is in close contact with the handle 3. The little finger contact portion 5e is located at the boundary between the handle 3 and the convex end 3m. When cutting the workpiece 4 as an outline of the movement of the knife 1, the force point portion 4a has a movement around the thumb base 5d as a fulcrum and the little finger contact portion 5e as a force point. At this time, not only the little finger but also the middle finger, the ring finger, etc. and the palm of the hand become the power points. In light work, it can be covered by the movement with the little finger contact part 5e as a power point.

When the five fingers of the hand are naturally lightly gripped, an inner surface configuration in which the fingers are gripped by a substantially flat egg is generated. The inner line formed by the second indirect and third of the index finger, the middle finger, the ring finger, and the little finger forms a substantially spherical shape. A substantially spherical convex belly 3b is formed in substantially the same manner as this curve. In addition, when gripped with five fingers, the abdomen of the finger near the second indirect and third indirect of the thumb 5a draws a substantially spherical shape. The shape of the back side of the handle 3 is substantially the same as the convex back 3d. It has a spherical shape. Similarly, the side surface of the handle 3 has a substantially spherical shape and forms the convex side 3i. The bulges in the central portions of the convex belly 3b, convex back 3d, and convex side 3i are about 5 millimeters. When these and these combinations hold the handle 3, the inside of the hand 5 easily fits the entire handle 3. Further, the force from the arm enters the straight line into the extension 8 of the force from the arm. For this reason, it is easy to apply force to the kitchen knife 1, and it is easy to apply force to the force point 4a.

Further, the anti-slip pattern 3h on the side surface has an anti-slip effect that suppresses the aesthetics of the design and the rotation of the handle 3 or the like. Although not shown, the anti-slip pattern 3h may have a convex shape or a concave shape, or may be color-coded for discrimination such as color coating or the like on the pattern portion to divide the purpose of use of the knife.

  FIG. 10 shows another embodiment of the present invention, in which a step is provided on the convex belly 3b, and the apex of each step forms a substantially spherical shape, and the two steps where the middle finger and ring finger are located are shown. It is attached.

  FIG. 11 shows another embodiment of the present invention, in which the front turning portion 3a is composed of a slightly elastic gripping damper 3e that is attached from the handle 3. The grip damper 2e may be integrally formed with a handle made of metal such as stainless steel or plastic (polypropylene or the like), or may be attached by welding, bonding, screwing, or the like. (A) shows a case where the tip is opened, and (b) shows a case where the tip is closed.

FIG. 12 shows another embodiment of the present invention, in which a knife 2c of a knife 2 of a knife 1 is provided with a notch 2d, which makes it easy to cut fiber vegetables and meat, fish bones, and the like. Increase. In order to reduce the breakage of the blade, the interval between the notches is about 3 mm, and the notch depth is about 1 mm. Further, it is possible to prevent breakage of the blade by making the blade tip angle dull. Further, since there is a notch interval and the ratio of the flat surface of the small blade 2d is large, the small blade 2d is regenerated by sharpening the flat surface of the small blade, unlike the case where the entire small blade 2d is provided with a notch. (A) shows what provided the substantially V-shaped notch, (b) shows what provided the ellipse-shaped notch 2d, and what set the front-end | tip angle 9 of the blade to about 30 degree | times. The tip angle of the conventional double-edged blade is about 10 to 20 degrees, and the blunt angle of the single-edged blade is about 25 degrees. However, by reducing the blade tip angle 9 from 30 to 55 degrees, the occurrence of chipping can be suppressed. I can do it. In addition, the sharpness is generally dull by making the blade edge an obtuse angle, but the actual sharpness is greatly influenced by the angle of about 0.1 mm at the tip of the blade. The blade can be made of a harder material. FIG. 13 shows a view in which the notch 2d is sharpened with the grindstone 7, and the notch 2d is also relatively easy to sharpen.

It is a three-dimensional figure of the example which grasped the conventional kitchen knife. It is a three-dimensional figure of the example which grasped the conventional kitchen knife. It is sectional drawing of the example which grasped the conventional knife. It is a top view of the Example of this invention. It is the three-dimensional view which grasped the kitchen knife of the Example of this invention. It is sectional drawing which grasped the kitchen knife of the Example of this invention. It is a top view which shows the other Example of this invention. It is the top view which shows the other Example of this invention, and the figure seen from the front and the plane. It is a schematic plan view which shows the cutting state which shows the other Example of this invention. It is a top view which shows the other Example of this invention. It is a top view which shows the other Example of this invention. It is a partially expanded plan view which shows the other Example of this invention. It is a partially expanded plan view which shows the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Knife 2 ... Blade 2a ... Blade ridge 2b ... Metal part axis 2c ... Small blade 2d ... Notch 3 ... Handle 3a ... Front side turning part 3b ... Convex belly 3c ... Little finger support part 3d ... Convex back 3e ... Gripper damper 3f ... grip part 3g ... collar part 3h ... anti-slip pattern 3i ... convex side 3j ... grip cross section 3k ... grip cross section 3m ... convex end 3n ... front side turning axis 3o ... side dimension 4 ... workpiece 4a ... force point part 5 ... Hand 5a ... thumb 5b ... index finger 5c ... little finger 5d ... thumb base 5e ... little finger contact part 5f ... third indirect 6 ... pointing direction 7 ... grinding wheel 8 ... extension line of force from arm 9 ... tip angle of blade

Claims (5)

The gripping position of the thumb and forefinger when gripping the handle with five fingers on the handle of the kitchen knife is the front turning part, and from the second indirect of the index finger to the vicinity of the base of the index finger is located on the lateral side of the front turning part. Dimension, the axis of the front turning part is near the blade peak, and the convex end of the semi-spherical shape is provided in the direction of the ventral side of the handle from the position where the little finger hangs to the end of the handle. Kitchen knife. In Claim 1 of the said description, the hook-shaped convex collar part was provided in the blade side of the front side rotation part of a handle | pattern part, or the front side rotation part of the handle | pattern was provided with the concave grip dent part. Or a knife with a heel and a grip dent on the blade side of the handle. In Claim 1 and Claim 2 of the said description, the convex belly which made the abdominal part of the handle | strain the substantially spherical-shaped convex part, or the convex back | bag which used the back part of the handle | strain as the substantially spherical convex part, or the both sides side surface of a handle | pattern A kitchen knife provided with a convex side that is a substantially spherical convex part and provided with a side pattern with anti-slip or design concave or convex pattern on the convex side. And a knife that combines convex belly, convex back, convex side and side pattern. A versatile kitchen knife for vegetables, meat and fish, wherein the blade is a double-edged blade and the blade tip angle is 30 to 55 degrees in claim 1, claim 2 or claim 3. Claims 1, 2, 3, and 4 according to the previous period, wherein the blade tip is provided with notches of about 1 mm at intervals of about 3 mm.

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