JP7105008B2 - cutting tool - Google Patents

Description

The present invention relates to cutting tools.

Generally, a cutting tool is widely used as a tool for cutting things. FIG. 9 shows a side view of a conventional general cutting tool, here a kitchen knife, and how it is used. 9A and 9C show a side view of a kitchen knife 51, which is an example of a conventional cutting tool.

The kitchen knife 51 has an action portion 52 for cutting an object and a handle portion 53 for gripping the knife 51 . The working portion 52 has a ridge 54 and a cutting edge 55 . The action portion 52 is connected to the handle portion 53 via the connection portion 56 .

9B and 9D show how the kitchen knife 51 is used. When using the kitchen knife 51, the handle 53 is gripped with the hand 70 with the cutting edge 55 facing downward, and the action portion 52 of the knife 51 is operated by the movement of the hand 70 to cut the object to be cut.

Patent Literature 1 proposes a kitchen knife having a recessed portion for pressing the thumb in the vicinity of the connecting portion between the handle portion and the working portion. When using this knife, the user is guided to hold the knife with the blade upright by pressing the thumb against the recess and holding the handle (see FIG. 3).

Registered Utility Model No. 3196875

In normal use, there are two ways to cut an object to be cut, such as a food material, with a cutting tool. With the blade of the cutting tool facing downwards, the cutting tool cuts by applying force vertically from top to bottom. ”. In actual cutting, push cutting and pulling cutting are often performed at the same time.

During push-cutting, the working portion receives resistance from the object to be cut, so the tip portion of the working portion tends to rise with respect to the handle.

For this reason, it is necessary to apply force to the tip portion of the working portion in order to perform push cutting.

In order to apply force to the tip portion of the working portion, it is often practiced to press the ridge of the working portion with the other hand.

However, it is not preferable for safety to put a hand near the blade. In addition, it is not preferable from the viewpoint of hygiene because there is a possibility that the hands may come into contact with foodstuffs or the like.

On the other hand, in the above-described conventional cutting tool, there is a problem that when force is applied to the tip portion of the working portion by holding only the handle portion, sufficient force cannot be applied. In addition, with conventional cutting tools, when force is applied to the working part to push it off, the surface of the blade tends to fall down. I had a problem.

According to the technique disclosed in Patent Document 1, it is easy to prevent the surface of the blade from collapsing.

According to the technique of Patent Literature 1, depressions (“inclined depressions” in Patent Literature 1) are provided on both sides of the tip of the handle of the kitchen knife. The thumb of the user is guided there to support the handle of the knife from the side. By supporting the handle of the knife from the side, it becomes easier to prevent the knife from falling over, and the wobbling of the blade surface during cutting can be prevented.

However, according to the kitchen knife of Patent Document 1, since the inclined recess presses the handle of the knife only from the side, when the tip of the blade receives resistance from the object to be cut, the inclined recess is pushed. There was a problem that the cutting edge rotates as the center and rises. As a result, the handle must be firmly gripped, making cutting difficult.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cutting tool that is easy to apply force with one hand when pushing and cutting, and that is easy to hold stably.

The cutting tool of the present invention is, for example,
a working part for cutting;
A cutting tool comprising a handle connected to the action part via a connection part,
a first finger hook portion for putting a thumb on, which is provided at the end portion of the handle portion on the side of the connection portion and on the pressing side of the push cut;
a second finger rest provided on the supporting side of the handle portion farther from the connecting portion than the first finger rest, for placing the index finger or the middle finger;
characterized by comprising

The second finger hook may be provided at a position separated from the connecting portion by 15 mm or more from the first finger hook.

A side surface of the handle may be provided with a third finger hook for gripping with one or more of the middle finger, ring finger and little finger.

The distal end of the action portion may be provided with a fourth finger hook portion for applying pressure to the pressing side of the push cut.

The acting portion may have a cutting edge, and the longitudinal center line of the handle may be inclined at an angle of 16 degrees or more with respect to the cutting edge.

The first finger rest portion may have a substantially flat top surface, and the top surface may be inclined at an angle of 10 degrees or less with respect to the edge of the cutting edge.

The second finger rest may have an arcuate surface that is one-third or more of a circle with a diameter of 20 mm or more.

The supporting side of the handle portion may be a curved portion gently curved in a concave shape from a projection adjacent to the second finger rest portion to the distal end of the handle portion.

A top surface of the first finger rest may be concavely curved.

The action portion may have a curved, triangular, or square blade shape when viewed in a horizontal cross section in the longitudinal direction.

The cutting tool may be a kitchen knife for cutting soba or rice cake.

The action portion may have a wavy or jagged cutting edge.

A distance from the tip of the action portion to the connection portion may be 20 cm or less.

A maximum thickness portion of the action portion may be 2 mm or less.

According to the present invention, it is possible to provide a cutting tool that is easy to apply force with one hand when pushing and cutting, and that is easy to hold stably.

It is the top view (A), top view (B), and side view (C) which were shown with the cutting shape of the cutting tool by one Embodiment of this invention. FIG. 4 is an explanatory diagram illustrating the state of action of the force of the cutting tool according to one embodiment of the present invention; It is explanatory drawing explaining the action state of the force of the conventional cutting tool. 1 is a side view of a cutting accessory in use according to an embodiment of the present invention; FIG. 1 is a side view of a cutting accessory in use according to an embodiment of the present invention; FIG. 1 is a side view of a cutting accessory in use according to an embodiment of the present invention; FIG. It is the top view (A) and side view (B) of the cutting tool by one Embodiment of this invention. 1 is a side view of a cutting accessory according to one embodiment of the invention; FIG. It is a side view (A) of a kitchen knife as an example of a conventional cutting tool, a side view (B) in use, a side view (C), and a side view (D) in use.

An example of an embodiment will be described below with reference to the drawings. In addition, the conventional technology will be shown as necessary to explain the difference.

In the following description, the lengthwise direction of the cutting tool will be referred to as the "longitudinal direction", and the direction perpendicular to the lengthwise direction of the cutting tool will be referred to as the "transverse direction". The cutting tool of the present application is assumed to be used in a state in which the handle is held and the cutting tool is pushed down, and the side that presses the cutting tool when performing a push cut is defined as the "pressing side" (the crest side or upper side of the blade). , the side that supports the handle from below is the “supporting side” (blade side or lower side). In addition, in the longitudinal direction of the cutting tool, the proximal side for the user is defined as the "base end side", and the distal side for the user is defined as the "distal side".

FIG. 1 shows a kitchen knife 1 as an example of a cutting tool. FIG. 1(A) is a plan view showing both an example of an object cut by the knife 1 and the knife 1, FIG. 1(B) is a plan view of the knife 1, and FIG. 1(C) is a side view of the knife 1. .

As shown in FIG. 1, the kitchen knife 1 has a working portion 2 for cutting an object and a handle 3 for gripping the knife 1. As shown in FIG.

The working part 2 has a ridge 4 and a cutting edge 5 . The action portion 2 is connected to the handle portion 3 via the connection portion 6 .

The action portion 2 of the present embodiment has a curved blade (horizontal wave blade) that is curved in a wave shape when viewed in a horizontal cross section in the longitudinal direction. When cut with the curved blade (horizontal wave blade), the cut product has a wavy cut shape, which is preferable in terms of the appearance of the cut product and ease of cooking.

For example, if the working portion 2 is cut with a half pitch shift in the longitudinal direction with respect to the initial cut, a cut product in which portions with different thicknesses repeatedly appear as shown in FIG. 1(A) can be obtained. Further, for example, if the working portion 2 is not displaced in the longitudinal direction with respect to the first cut end and cut with a certain thickness, a wave-shaped cut product with a constant thickness can be obtained.

It is preferable that the depth d1 of the corrugation of the curved blade of this embodiment has a distance equal to or greater than the pitch width p. For example, corrugation depth d1/pitch width p is preferably 0.6 to 2.0, more preferably corrugation depth d1/pitch width p is 0.8 to 1.8. When the corrugation depth d1/pitch width p is 0.8 to 1.8, the pitch width p is 0.6 to 1.25 cm when the corrugation depth d1 is 1 cm.

The shape of the action portion 2 when viewed in a horizontal cross-section in the longitudinal direction is not limited to the waveform described above, and may be a curved blade with a curved shape, a straight triangular blade or a square blade. good too.

Further, although the cutting edge 5 of the action portion 2 of the present embodiment is a straight blade that is linear when viewed from the side, the shape of the cutting edge 5 viewed from the side is arbitrary. For example, it may be a jagged cutting edge or a wavy cutting edge.

The distance (blade) from the tip of the acting portion 2 to the connecting portion 6 is preferably 7 cm to 25 cm, more preferably 8 cm to 18 cm. The maximum thickness of the action portion 2 may be 2 mm or less. A curved blade (horizontal wavy blade) creates a wavy shape in a hard ingredient such as carrots and cuts them into pieces. do. For this reason, if the thickness of the blade is thick, it will be difficult to cut smoothly. In addition, if the wall thickness is large, when forming waves, fine-pitched wavy lines cannot be formed. For these reasons, it is preferably 0.6 mm to 1.2 mm.
At a position near the connecting portion 6 of the handle portion 3, that is, at the end portion of the handle portion 3 on the connecting portion side and on the pressing side when performing push-cutting, a first finger hook portion 7 for putting a thumb is provided. The first finger hooking portion 7 has a flat or curved top surface 8 which is shaped to allow the thumb to be easily placed thereon. The top surface 8 of the first finger rest portion 7 may be provided with a convex or concave anti-slip 9 .

The top surface 8 of the first finger rest 7 preferably has a constant width in the transverse direction. The width of the first finger rest portion 7 is preferably about 1 cm or more. The width of the first finger hook portion 7 may be equal to the width of the handle portion 3 in the same direction, but may be determined independently of the width of the handle portion 3 . The shape of the top surface 8 of the first finger hook portion 7 in a plan view may be substantially rectangular, or may be any shape such as a circle or an ellipse.

The first finger rest portion 7 may be made of the same material as or different from the handle portion 3 . Further, the first finger hook portion 7 may be formed integrally with the handle portion 3, or may be formed by combining separate members. The first finger rest portion 7 is a flexible member, and may be made of, for example, a shock-absorbing polymer gel (gel), an elastomer having a hardness of 10 to 30 degrees, silicone rubber, or the like. Conversely, the first finger rest portion 7 is a member having a relatively high rigidity, and is made of, for example, elastomer, silicone rubber ABS, PETG (Tritan), polypropylene, nylon, vinyl chloride, polyurethane foam, or the like. good too.

This embodiment has a second finger hooking portion 10 provided on the support side of the handle portion 3 at a position of the handle portion 3 farther from the connecting portion 6 than the first finger hooking portion 7 for placing the index finger or the middle finger. is doing.

Specifically, the second finger hooking portion 10 is formed of a concave portion on which the index finger or the middle finger can be easily hooked. The concave portion of the second finger rest portion 10 may have an arcuate surface of one-third or more of a circle with a diameter of 20 mm or more.

The second finger hooking portion 10 is preferably provided at a front position separated from the connecting portion 6 by 15 mm to 40 mm or more (more preferably 15 mm to 30 mm) from the first finger hooking portion 7 . This effect will be described later.

In other words, the center c2 of the first finger rest 7 (defined as 20 mm on average for the diameter of the part that hits the pad of the thumb) is the center c1 of the second finger rest 10 (the diameter of the index finger is It is preferably provided at a front position L1 that is 15 mm to 40 mm or more (more preferably 15 mm to 30 mm) away from (defined as 18 mm).

The second finger rest 10 has an adjacent protrusion 11, either as a result of its formation in the recess, intentionally formed, or both. The supporting side of the handle portion 3 is a curved portion 12 that gently curves into a concave shape from the adjacent protrusion 11 to the distal end of the handle portion 3 .

The adjacent protrusion 11 is preferably provided at a position 16 mm to 40 mm or more (more preferably 16 mm to 30 mm) away from the connecting portion 6 from the first finger hook portion 7. , ring finger, little finger, or a plurality of fingers. The third finger rest portion 13 may have a shape that can be easily gripped with the middle finger, the ring finger, and the little finger. Specifically, the third finger resting portion 13 may be formed of a gentle recess provided on the side surface of the grip portion 14 or a portion of the grip portion 14 having a substantially flattened or elliptical cross section.

As shown in FIG. 1(C), the longitudinal center line of the handle 3 of this embodiment is inclined with respect to the action portion 2 . More precisely, the working portion 2 has an edge of a cutting edge 5 with which the longitudinal centerline of the handle 3 is inclined by 16° to 50°. Preferably, the longitudinal centerline of the handle portion 3 is inclined by 20 to 45 degrees with respect to the edge of the cutting edge 5 of the action portion 2 .

The top surface 8 of the first finger rest 7 can also be inclined with respect to the edge of the cutting edge 5 .

Let α be the inclination angle of the longitudinal center line of the handle 3 with respect to the edge (cutting edge) of the cutting edge 5 of the action part 2, and let β be the inclination angle of the top surface 8 of the first finger rest 7. It is preferable that the inclination angle β of the top surface 8 of the finger hook portion 7 is less than or equal to the inclination angle α of the longitudinal centerline of the handle portion 3 .

When the inclination angle of the longitudinal centerline of the handle portion 3 with respect to the edge of the blade edge 5 of the action portion 2 is 16 degrees or more, the top surface 8 of the first finger rest portion 7 with respect to the edge of the blade edge 5 of the action portion 2 is preferably 10 degrees or less.

Since the inclination angle β of the top surface 8 of the first finger rest 7 is smaller than the inclination angle α of the longitudinal centerline of the handle 3, there is an effect that the thumb is easily applied with force.

Also, the top surface 8 of the first finger rest portion 7 can be curved in a concave shape.

The top surface 8 of the first finger resting portion 7 is concavely curved from the handle portion side to the connecting portion side, so that when the thumb is placed on the first finger resting portion 7, the thumb rests on the first finger resting portion. Easy to fit in part 7. In addition, even when the knife 1 is reciprocated in the up-and-down direction or the front-and-rear direction, the thumb does not easily slip forward, making it easy to use. In addition, by providing a plurality of convex or concave steps on the surface, it is possible to make it more difficult to slip forward.

Here, with reference to FIGS. 2 and 3, the effect of the inclination of the longitudinal center line of the handle portion 3 will be described.

FIG. 2 shows a state in which an object 20 to be cut is cut by the kitchen knife 1 of this embodiment. 2A is a side view of the kitchen knife 1, and FIG. 2B is a cross-sectional view of the working part 2 from the front.

When the longitudinal centerline of the handle 3 is inclined by 16 degrees or more, the cutting edge 5 of the action part 2 is located above the line of action of the force of the handle 3 as shown in FIG. 2(A). Therefore, when the handle 3 is gripped and pushed downward, the cutting edge 5 hits the object to be cut 20 with a delay, and as a result, as shown in FIG. f2 acts upward above force f1.

When the blade face falls down (tilts) under this force, the force f3 pushes down, and the force f1 and the resistance f2 deviate. . This will bring the face of the blade back to vertical.

That is, since the longitudinal center line of the handle portion 3 is inclined, it is possible to naturally correct the inclination of the blade surface when it is pushed down for cutting.

For comparison, FIG. 3 shows the state of cutting by a conventional kitchen knife 51 .

3A is a side view of the knife 51 viewed from the side, and FIG. 3B is a cross-sectional view of the working portion 52 viewed from the front.

Since the working portion 52 and the handle portion 53 of the conventional kitchen knife 51 are connected substantially linearly, as shown in FIG. located below. Therefore, when the handle portion 53 is gripped and moved downward as if pushing it off, the cutting edge 55 hits the object 20 to be cut, and as a result, as shown in FIG. acts upwards below the

When the blade face falls under this force action state, the force f3 pushes down, and the force f1 and the resistance f2 deviate to generate a force couple in the direction R3 that tilts the blade face. This allows the blade face to recline further.

That is, since the longitudinal center lines of the action part 2 and the handle part 3 are linearly connected, the surface of the blade tends to fall when it is pushed down for cutting.

As is clear from the description of FIGS. 2 and 3, in this embodiment, the longitudinal centerline of the handle 3 is inclined by 16 degrees or more or 20 degrees or more with respect to the edge of the cutting edge 5 of the action part 2. As a result, the face of the blade can be easily stabilized in a vertical state when cut down, and as a result, it is no longer necessary to grip the handle 3 with a great amount of force to prevent the face of the blade from falling. Therefore, it becomes possible to cut easily.

Next, with reference to FIG. 4, the configuration of the kitchen knife 1a of another embodiment and the effects of the first finger resting portion 7a, the second finger resting portion 10a and the third finger resting portion 13a will be described.

In FIG. 4, the same parts as those in FIG. 1 are given the same reference numerals, and redundant description may be omitted.

The kitchen knife 1a of FIG. 4 has the same configuration as the kitchen knife 1 of FIG. 1 except that it has a third finger hook portion 13a with a different shape.

The third finger hooking portion 13a of this embodiment is formed in the side surface of the grip portion 14a, and is formed by a gentle concave portion that fits the belly of the middle finger, ring finger, and little finger. The kitchen knife 1a can be firmly gripped by placing the middle finger, the ring finger and the little finger on the third finger rest 13a to grasp the grip 14a.

Here, with reference to FIG. 4, the effects of the finger hooking portion will be described. It should be noted that the action and effect of this finger hooking portion are the same in the case of the kitchen knife 1 in FIG.

As described above, when the handle portion 3a is gripped and force is applied downward to cut down, the resistance of the object to be cut acts on the working portion 2a, the tip of the working portion 2a rises, and the kitchen knife 1a moves toward the clock as shown in FIG. try to spin around. On the other hand, in order to push the action portion 2a parallel, it is necessary to apply a counterclockwise torque X shown in FIG. 4 to the kitchen knife 1a to cancel the clockwise rotation.

According to this embodiment, since the thumb is put on the first finger-putting portion 7a and the index finger or the like is put on the second finger-putting portion 10a, forces Y and Z act on the handle portion 3a as shown in FIG. , a counterclockwise torque X can be produced. In this case, since the second finger hook portion 10 is separated from the connecting portion 6 by 15 mm or more from the first finger hook portion 7a, the distance between the lines of action of the forces Y and Z is about 15 mm or more, and the small forces Y and Z can produce a large counterclockwise torque X.

Due to the counterclockwise torque X, force is applied to the tip of the working portion 2a, and push cutting can be performed while the cutting edge 5 of the working portion 2a is kept horizontal.

Furthermore, since the kitchen knife 1a has a gently concave curved portion from the adjacent protrusion 11 to the proximal end of the handle portion 3a, it receives force from the middle finger, the ring finger, and the little finger, and counterclockwise torque X is generated. increase. Therefore, the handle 3a can be gripped with a small force, and a large counterclockwise torque X can be generated. Furthermore, the handle 3a can be stably gripped by holding the handle 3a toward the palm from the side surface of the grip portion 14a by the third finger hooking portion 13a.

The width W1 of the grip portion 14a is set to 20 mm or more, assuming that the average length of the inner side in the state where the first joint of the middle finger is bent and pressed is 20 mm. It is preferably 28 mm to 45 mm.

FIG. 5 shows a kitchen knife 1b according to still another embodiment.

FIG. 5 shows the kitchen knife 1a of FIG. 4 further provided with a fourth finger hooking portion 15 on the tip side of the working portion.

In FIG. 5, the same parts as in FIG. 4 are denoted by the same reference numerals, and redundant description may be omitted.

If you try to operate a kitchen knife with a horizontal wave blade by gripping only the grip portion 14b, the blade must be straightly applied to the foodstuff and a large amount of force in the support side direction is required.

Since the kitchen knife 1b has the fourth finger hook portion 15, it is possible to stably apply force. In addition, the distance (blade) from the tip of the action portion 2b to the connection portion 6 can be made longer by having the fourth finger hook portion 15 at the tip portion. The blade is preferably between 7 cm and 30 cm, more preferably between 8 mm and 25 cm. The maximum thickness of the action portion 2b may be 2 mm or less. Preferably, it is 0.6 mm to 1.2 mm.

When using, the action part 2b of the kitchen knife 1b is vertically placed on the food. One of the fingers or a plurality of fingers of the hand not gripping the handle 3b is placed on the top surface 8b of the fourth finger hooking portion 15. - 特許庁By downwardly applying the force of the hand gripping the handle 3b and the finger placed on the fourth finger hook 15, the food can be cut with a greater force than when cutting with one hand.

The top surface 8 b of the fourth finger hooking portion 15 is substantially flat or curved in a concave shape. The shape of the top surface 8b in plan view may be substantially rectangular, or may be any shape such as a circle or an ellipse.

The fourth finger hook portion 15 may be integrated with the kitchen knife 1b, or may be detachable.

This embodiment is also useful when a person with rheumatism or the like who finds it difficult to apply force or who is weak uses a kitchen knife, or when a normal user cuts a hard object such as pumpkin or rice cake.

By providing the fourth finger hooking part 15, there is also an effect of protecting the tip of the kitchen knife 1b, so that elderly people and children can use it with confidence. Here, the fourth finger hooking portion 15 does not necessarily have to be hooked only with a finger, and may be used with a portion other than the finger (for example, a sword portion) hooked thereon.

FIG. 6 shows a kitchen knife 1c according to yet another embodiment.

In addition, in FIG. 6, the same parts as those in FIG. 1 are denoted by the same reference numerals, and redundant description may be omitted.

The kitchen knife 1c of FIG. 6 has the same configuration as the kitchen knife 1 of FIG. 1 except that it has a first finger hook portion 7c with a different shape.

The first finger hook portion 7c of the kitchen knife 1c has a shape in which the tip protrudes toward the action portion 2c, that is, as shown in FIG.

The top surface 8c of the first finger rest portion 7c is flat or gently concave. Therefore, the grip of the handle 3c is thin in the vicinity of the second finger rest 10, and the grip of the handle 3c is thick in the vicinity of the first finger rest 7c.

According to this embodiment, the distance between the first finger resting portion 7c and the second finger resting portion 10 is further increased, and the distance between the lines of action of the forces Y and Z is increased. A large counterclockwise torque X can be produced.

In addition, since the tip of the first finger rest 7c protrudes toward the working portion 2c, the possibility that the thumb slips and touches the working portion 2c is reduced, ensuring safety.

FIG. 7 shows a kitchen knife 1d according to still another embodiment. FIG. 7(A) shows a plan view of the knife 1d, and FIG. 7(B) shows a side view of the knife 1d.

7, the same parts as in FIG. 6 are denoted by the same reference numerals, and redundant description may be omitted.

The kitchen knife 1d of FIG. 7 has a second finger rest portion 10d with a different shape, and the action portion 2d is not a curved blade (horizontal wave blade) but a normal plate-shaped blade, so the blade structure and thickness of the blade are different. , the blade, etc. may be different, but otherwise it has the same configuration as the kitchen knife 1c of FIG.

The kitchen knife 1d has an action portion 2d and a handle portion 3d, and the action portion 2d is a plate-like blade as clearly shown in FIG. 7(A).

A second finger hooking portion 10d of the handle portion 3d is a wide concave portion that can be hooked with two fingers, the index finger and the middle finger. An adjacent projection 11d is formed in a portion adjacent to the second finger resting portion 10d.

As with the first finger hooking portion 7c in FIG. 6, the first finger hooking portion 7d has a shape in which the tip portion protrudes toward the action portion 2d, so that the handle portion closes to the second finger hooking portion 10d. The handle 3d has a thin grip, and the handle 3d has a thick grip near the first finger hook 7d.

According to this embodiment, the second finger resting portion 10d is a wide concave portion, and two fingers, the index finger and the middle finger, are put thereon, so that the force Z is large, and the center line of action is further from the first finger resting portion 7d. Due to the separation, a large counterclockwise torque X can be produced.

FIG. 8 shows a kitchen knife 1e according to still another embodiment.

8, the same parts as in FIG. 1 are denoted by the same reference numerals, and redundant description may be omitted.

The kitchen knife 1e of FIG. 8 is the same as the kitchen knife 1 of FIG. 1, except that the working portion 2e is not a curved blade but a normal plate blade, and the cutting edge 5e is wave-shaped or jagged. have a configuration.

The effects of this embodiment are the same as those of the kitchen knives 1, 1b, and 1c described above.

The cutting tool of this embodiment can be used as various kitchen knives such as soba knives and rice cake knives, knives, cutters, and the like. The cutting tool is not limited to the cutting tools described above, and can be used as various cutting tools for cooking and cutting tools for processing vegetables. Here, the cutting tool for cooking and the cutting tool for vegetable processing also include the working part of the machine/instrument of the mechanical mechanism.

Based on the above description, those skilled in the art may conceive additional effects and various modifications of the present invention, but aspects of the present invention are not limited to the examples of the embodiments described above. . Various additions, changes, and partial deletions are possible without departing from the conceptual idea and spirit of the present invention derived from the content defined in the claims and equivalents thereof.

1, 51, 1a, 1b, 1c, 1d, 1e: kitchen knives 2, 52, 2b, 2c, 2d, 2e: action parts 3, 53, 3a, 3b, 3c, 3d, 3e: handle parts 4, 54, 4b , 4c, 4d, 4e: ridges 5, 55, 5b, 5c, 5d, 5e: cutting edges 6, 56, 6b, 6c: connecting portions 7, 7a, 7b, 7c, 7e: first finger rests 8, 8b, 8c: top surface 9: non-slip 10, 10c: second finger rests 11, 11c: adjacent protrusions 12, 12c: curved portions 13, 13a, 13b: third finger rests 14, 14a, 14b, 14c, 14d : Grip portion 15: Fourth finger hook portion 20: Cutting object 70: Hand

Claims (2)

a working part for cutting;
A cutting tool comprising a handle connected to the action part via a connection part,
a first finger hook portion for putting a thumb on, which is provided at the end portion of the handle portion on the side of the connection portion and on the pressing side of the push cut;
a second finger-holding portion for placing an index finger provided on the support side of the handle portion farther from the connecting portion than the first finger-holding portion;
The grip part of the handle part has a gentle concave part on the side surface behind the second finger hook part, where the first phalanx including the fingertip parts of the fingers other than the thumb and index finger is put. provided at a position closer to the support-side end than the pressing-side end of the grip portion, and away from the pressing-side end and the supporting-side end,
A cutting tool, wherein the grip portion of the handle portion has a width of 28 mm to 45 mm at a portion having the concave portion where the ring finger is placed. A cutting tool according to claim 1,
A cutting tool characterized by comprising a fourth finger hooking portion for applying pressure to the pressing side of push-cutting at the distal end portion of the working portion.

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