EP4633884A1 - Couteau de cuisine - Google Patents
Couteau de cuisineInfo
- Publication number
- EP4633884A1 EP4633884A1 EP23836902.9A EP23836902A EP4633884A1 EP 4633884 A1 EP4633884 A1 EP 4633884A1 EP 23836902 A EP23836902 A EP 23836902A EP 4633884 A1 EP4633884 A1 EP 4633884A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- edge
- junction
- handle
- longitudinal
- longitudinal plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B3/00—Hand knives with fixed blades
- B26B3/02—Table-knives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/10—Handle constructions characterised by material or shape
- B25G1/102—Handle constructions characterised by material or shape the shape being specially adapted to facilitate handling or improve grip
Definitions
- the present invention relates to the field of knives, and more specifically kitchen knives.
- Knives especially kitchen knives, can be held and used for long periods of time. Their design is therefore essential to give the user the best possible experience, as well as a certain mastery and dexterity of the gesture.
- the knife handle also called the handle.
- An aim of the present invention is to provide a knife whose grip by a user is not only comfortable but also safe, in particular without impromptu movement of the hand when using the knife.
- Another aim of the present invention is to provide a knife that does not require too much pressure on the handle during use, avoiding muscle fatigue.
- an aim of the present invention is to provide a knife with a handle whose shape naturally adapts to the shape of the hand, whatever the size of the user's hand, and whatever the hand (right or left) used.
- Another aim of the present invention is to provide a knife for which the grip is optimized, and where the effort required to properly hold and maintain the knife is limited.
- Another aim of the present invention is to provide a knife where user fatigue is reduced and where their efforts are concentrated on cutting and not on gripping the knife.
- Another aim of the present invention is to provide a one-piece knife, that is to say the handle of which is formed in the material similar to that of the blade, in particular a metallic material, which does not slip in the hand of the user when the latter uses it.
- Yet another aim of the present invention is to provide a knife whose design principles are applicable to all sizes of knife.
- a blade having a blade spine and a sharp blade edge opposite the blade spine, the blade extending in a longitudinal plane in a longitudinal direction between a distal end and a proximal end,
- the handle having a junction portion connected to the proximal end of the blade, and a main gripping portion extending from the junction portion, the main gripping portion having an upper edge extending substantially in the extension of the back of the blade in the longitudinal plane, a lower edge extending in the longitudinal plane and opposite the upper edge, two sides respectively on either side of the longitudinal plane and extending between the upper edge and the lower edge, each side being formed of an upper side portion connected to the upper edge and a lower side portion connected to the edge lower, the upper flank portion being connected to the lower flank portion via an edge gripping portion projecting transversely and constituting the area of the outermost sidewall transversely with respect to the longitudinal plane, in which the main gripping portion of the handle has a shape having a longitudinal flare extending from the portion of junction in the longitudinal plane and defined by a longitudinal flare angle a formed between the lower edge and the upper edge, the longitudinal flare angle a having a fixed value between 3° and 8°
- the longitudinal flare angle has a fixed value of between 3.5° and 5.5°.
- the ratio between the lower boom and the handle height has a fixed value of between 15% and 18%, preferably a value of around 17%.
- the upper edge and the lower edge each extend along a straight line, and in which each gripping edge extends along a straight line.
- the gripping edge projects relative to the sidewall, the internal angle formed between the upper sidewall portion and the lower sidewall portion defining a gripping edge angle 0 which is preferably less than 160°, more preferably between 120° and 150°, and more preferably between 135° and 145.
- the handle height of the main gripping portion at the level of the connection with the junction portion has a value between 17mm and 22mm, preferably a value between 18mm and 21mm, more preferably of the order of 20mm.
- the junction portion comprises o an upper junction edge extending substantially in the extension of the back of the blade in the longitudinal plane, the upper junction edge connecting the back of the blade to the upper edge of the main gripping portion, o a lower junction edge extending in the longitudinal plane and opposite the upper junction edge, the lower junction edge connecting the proximal end of the blade to the lower edge of the main gripping portion, o two sides of junction respectively on either side of the longitudinal plane and extending between the upper junction section and the lower junction section, o each junction side being formed of a portion of upper junction side connected to the junction section upper and a lower junction flank portion connected to the lower junction edge, the upper junction flank portion being connected to the lower junction flank portion via a projecting junction gripping edge transversely and constituting the zone of the outermost junction flank transversely with respect to the longitudinal
- the ratio between the lower junction sag and the junction height has a maximum value of between 35% and 55%, preferably a maximum value of between 45% and 50%.
- the ratio between the lower junction arrow and the junction height has a minimum value equal to the value of the ratio between the lower arrow and the handle height of the main gripping portion.
- each joining gripping edge is curved and includes an inflection point at which a change in concavity is present.
- the projection of the point of inflection in the longitudinal plane is at a distance from the main gripping portion of between 5 mm and 10 mm, preferably between 6 mm and 9 mm.
- the joining portion of the handle has a shape having a longitudinal flare extending from the blade in the longitudinal plane and defined by a longitudinal junction flare angle aJ formed between the lower junction edge and the upper junction edge, the longitudinal junction flare angle aJ having a fixed value of between 15° and 20°.
- the upper junction slice extends along a straight line and the lower junction slice extends along a curve having a slice inflection point at which a change in concavity is present.
- the junction height of the junction portion has a minimum value between 14 mm and 18 mm, preferably between 15 mm and 16 mm.
- the handle further comprises an end portion connected to and extending from the main gripping portion, the end portion comprising o an upper end portion extending substantially in the extension of the back of the blade in the longitudinal plane, the upper end edge being connected to the upper edge of the main gripping portion, o a lower end edge extending in the longitudinal plane and opposite the upper end edge, the edge d the lower end being connected to the lower edge of the main gripping portion, o two end flanks respectively on either side of the longitudinal plane and extending between the upper end edge and the lower end edge , o each end flank being formed of a portion of upper end flank connected to the upper end edge and of a portion of lower end flank connected to the lower end edge, the portion of upper end flank being connected to the lower end flank portion via an end gripping edge projecting transversely and constituting the area of the outermost end flank transversely to in the longitudinal plane, o in which the distance in the longitudinal plane between the lower end section and the upper end section at a given position in the longitudinal direction defines an end height, and the distance in the
- the ratio between the lower end deflection and the end height has a minimum value between 0% and 10%, preferably a minimum value between 2% and 5%.
- the ratio between the lower end boom and the end height has a maximum value equal to the value of the ratio between the lower boom and the handle height of the main gripping portion.
- each end gripping edge is curved and has no inflection point.
- the upper end section extends along a straight line and the lower end section extends along a curve having no inflection point. the knife is in one piece.
- Figure 1 is a perspective view of a knife according to a first embodiment
- Figure 2 is a side view of the knife of Figure 1;
- Figure 3 is a top view of the knife of Figure 1;
- Figure 4 is a bottom view of the knife of Figure 1;
- Figure 5 is the side view of Figure 2 on which the longitudinal flare angle a has been shown;
- Figure 6 is the side view of Figure 2 on which the longitudinal flare angle of junction aJ has been shown;
- Figure 7 is the top view of Figure 4 on which the transverse flare angle P has been shown;
- Figure 8 is the top view of Figure 4 on which the transverse flare angle of junction pj has been shown;
- Figure 9 is a cross-sectional view of the junction portion of the knife handle along the section line A-A of Figure 3;
- Figure 10 is a cross-sectional view of the main gripping portion of the knife handle along the section line BB of Figure 3;
- Figure 11 is a cross-sectional view of the end portion of the knife handle along the section line CC of Figure 3;
- Figure 12 is a perspective view of a knife according to a second embodiment
- Figure 13 is a side view of the knife of Figure 12;
- Figure 14 is a top view of the knife of Figure 12;
- Figure 15 is a bottom view of the knife of Figure 12;
- Figure 16 is a side view of the knife handle according to the second embodiment, illustrating the groove angles
- Figure 17 is a perspective view of a knife according to a third embodiment
- Figure 18 is a side view of the knife of Figure 17;
- Figure 19 is a top view of the knife of Figure 17;
- Figure 20 is a bottom view of the knife of Figure 17;
- Figure 21 is a side view of the knife handle according to the third embodiment, illustrating the groove angles.
- a knife is made up of a blade 1 from which extends a handle 2, also commonly called a handle.
- Blade 1 always has the following geometry. It has a blade back 11 and a sharp blade edge 12 opposite the blade back 11, the sharp blade edge 12 forming the side by which a user can cut.
- the blade 1 extends in a longitudinal plane in a longitudinal direction L between a distal end 13 and a proximal end 14.
- the distal end 13 constitutes the free end of the blade, generally in the shape of a point or rounded.
- the proximal end 14 is coupled with the handle 2 as will be seen later.
- the blade 1 is generally a single piece formed from a single material, for example with a metal base.
- Blade 1 can take different shapes and sizes depending on the intended use.
- the handle 2 extends from the proximal end 14 of the blade 1 in the longitudinal direction L, the handle 2 being connected to the proximal end 14 of the blade 1.
- the handle 2 is connected to the blade 1 in an integral and fixed manner.
- the handle can for example be welded with the blade, in particular for the case of one-piece knives.
- a one-piece knife is a knife whose handle is formed from a material similar to that of the blade, in particular a metal-based material.
- a one-piece knife has a handle and blade formed from the same material.
- the proposed knife is in one piece. It could, for example, be made from a metallic material, in particular a steel alloy, for example stainless steel.
- the handle 2 comprises an upper handle edge 21 extending substantially in the extension of the blade back 11 in the longitudinal plane, and a lower handle edge 22 extending in the longitudinal plane and opposite the edge upper handle 21.
- the handle 2 further comprises two handle flanks 23 respectively on either side of the longitudinal plane and extending between the upper handle edge 21 and the lower handle edge 22. Each handle edge 23 thus makes it possible to connect the upper handle edge 21 to the lower handle edge 22.
- These handle sides 23 are preferably curved transversely outwards relative to the longitudinal plane. These are the handle sides 23 which will notably define the volume of the handle 2.
- each handle sidewall 23 is formed of an upper handle sidewall portion 231 connected to the upper handle edge 21 and a lower handle sidewall portion 232 connected to the lower handle edge 22.
- the upper handle flank portion 231 is connected to the lower handle flank portion 232 via a handle gripping edge 233 projecting transversely and constituting the area of the handle flank furthest away. the exterior transversely in relation to the longitudinal plane.
- a handle gripping edge 233 is formed in the lower part of the handle 2, that is to say on the side of the lower handle edge 22. More precisely, the handle gripping edge 233 is closer to the lower handle edge 22 than the upper handle edge 21.
- Such a handle gripping edge 233 is designed to fit into the interphalangeal line of the user so that his hand fits perfectly with the handle of the knife. The grip by the user is therefore more pleasant and the handling of the knife is secure since this handle gripping edge 233 prevents the knife from rotating in the hand around its longitudinal axis.
- the handle is preferably symmetrical with respect to the longitudinal plane.
- the structure and geometry of the sides are notably identical, the sides also being symmetrical with respect to the longitudinal plane.
- Such a configuration is particularly advantageous so that the knife can be used equally by a right-handed or a left-handed person, with the same advantages.
- the handle 2 is formed of several portions depending on the longitudinal position considered, these portions having shapes and functions which may differ.
- the handle 2 can first of all have a junction portion 100 connected to the proximal end 14 of the blade 1.
- this junction portion 100 can also be provided to promote fine manipulation of the knife, for example when the knife must be inclined along a translation axis orthogonal to the longitudinal plane.
- the handle 2 further has a main gripping portion 200 extending from the junction portion 100, and allowing the user to have a complete grip of the knife with their entire hand.
- This main gripping portion 200 corresponds to the largest portion of the handle in the longitudinal direction.
- the main gripping portion 200 can for example represent at least 2/3 of the length of the handle, or even at least 3/4 of the length of the handle, for example 80% of the length.
- the handle 2 further comprises an end portion 300 connected to and extending from the main gripping portion 200. If it is present, this end portion 300 thus constitutes the free end of the handle, opposite the tip of the blade.
- the main gripping portion 200 has an upper edge 221 (also called upper gripping edge) extending substantially in the extension of the back of the blade 11 in the longitudinal plane, a lower edge 222 (also called called lower gripping edge) extending in the longitudinal plane and opposite the upper edge 221, and two sides 223 (also called gripping sides) respectively on either side of the longitudinal plane and extending between the upper edge 221 and the lower bracket 222.
- upper edge 221 also called upper gripping edge
- a lower edge 222 also called lower gripping edge
- two sides 223 also called gripping sides
- each side is formed of an upper side portion 2231 connected to the upper edge 221 and a lower side portion 2232 connected to the lower edge 222.
- the upper flank portion 2231 is connected to the lower flank portion 2232 via a gripping edge 2233 projecting transversely and constituting the outermost zone of the flank transversely by relative to the longitudinal plane, as can be seen clearly shown in Figure 11 for example which illustrates a cross section of the handle in the main gripping portion.
- the gripping edge 2233 is preferably positioned specifically to fit in the interphalangeal line of the user so that their hand fits perfectly with the handle of the knife.
- the handle height H is defined corresponding to the distance in the longitudinal plane between the lower edge 222 and the upper edge 221 at a given position in the longitudinal direction L.
- the lower arrow Fi as the distance in the longitudinal plane between the lower edge 222 and the projection of the gripping edge 2233 in the longitudinal plane at a given position in the longitudinal direction L.
- the upper arrow Fs corresponds to the distance in the longitudinal plane between the upper edge 221 and the projection of the gripping edge 2233 in the longitudinal plane at a given position in the longitudinal direction L.
- the main gripping portion 200 is specifically formed so that the positioning of the gripping edge 2233 is such that the ratio between the lower arrow and the handle height is substantially constant at all points of the main gripping portion of the handle in the longitudinal direction L.
- substantially constant it is understood that the ratio is constant within manufacturing and measurement tolerances.
- the percentage value is constant at plus or minus 2%, or even at plus or minus 1%.
- the ratio between the lower arrow and the handle height has a fixed value of between 13% and 20%. Preferably, this value is between 16% and 18%, for example a value of around 17%.
- such a gripping edge 2233 in the main gripping portion 200 of the handle 2 also makes it possible to facilitate the cutting of food by a user in a direction substantially perpendicular to the longitudinal direction L of the blade. Indeed, such a gripping edge 2233 creates a projecting line coming in opposition to the user's hand when the latter makes an up and down movement with the knife. Not only is the force applied by the hand on the handle well transmitted to the blade, but this transmission of force is easier thanks to the 2233 gripping edge.
- the user can reduce the pressure exerted on the handle so that the knife still fits well in the hand.
- the handling of the knife is secure since this gripping edge 2233 prevents the knife from rotating in the hand around its longitudinal axis.
- the gripping edge 2233 is sufficiently protruding to fit well into the interphalangeal fold when a user takes the knife in hand.
- the gripping edge angle 9 which is the internal angle formed between the upper flank portion 2231 and the lower flank portion 2232 is preferably less than 160°, more preferably between 120° and 150°, and preferably still between 135° and 145°.
- the gripping edge 2233 is preferably straight.
- the lower slice 222 can extend along a straight line, just as the upper slice 221 extends along a straight line.
- the upper side portion 2231 and the lower side portion 2232 are curved with a concavity facing the inside of the handle.
- neither the upper flank portion 2231 nor the lower flank portion 2232 have an inflection point.
- Such geometry makes it possible to provide a handle 2 with a soft and pleasant design for the grip, the gripping edge 2233 making it possible to stabilize the handle 2 in the user's hand.
- the main gripping portion 200 of the handle 2 has a shape having a longitudinal flare extending from the junction portion 100 in the longitudinal plane and defined by a longitudinal flare angle a formed between the lower edge 2232 and the upper edge 2231, as illustrated in Figure 7.
- the longitudinal flare angle a has a fixed value which is between 3° and 8°. More preferably, the longitudinal flare angle a has a fixed value of between 3.5° and 5.5°. The longitudinal flare angle a has for example a value of around 4.5°.
- Such a longitudinal flaring of the handle 2 is particularly advantageous since it helps hold the knife in the hand during use.
- the longitudinal flare prevents the hand from sliding relative to the handle, in particular for a rearward translation, that is to say -say in the direction of the blade towards the handle.
- the particular longitudinal flare that is offered guarantees the user comfort in handling the knife. The sensation of the user's hand on the handle 2 is in fact not disturbed by an aggressive geometry and/or elements complementary to the handle which would aim to help maintain the hand on the handle.
- such a longitudinal flare makes it possible to mobilize all the fingers of the hand when the user holds the knife, in particular the fingers intended to be furthest from the blade (ring finger, little finger), in particular for the case where the upper edge of the main gripping portion is aligned with the back of the blade. Furthermore, the lower force exerted by the distant fingers is compensated by the fact that the handle height is greater (due to the longitudinal flare angle a), which makes it possible to guarantee a uniform grip, whatever the or the finger considered.
- the main gripping portion 200 of the handle 2 has a shape presenting a transverse flare extending from the junction portion 100 and defined by a transverse flare angle P formed between the two gripping edges 2233 of the sides of the main gripping portion 200 of the handle 2.
- the transverse flare angle P has a fixed value of between 1° and 5°. More preferably, the transverse flare angle P has a fixed value between 1.5° and 4°, preferably a fixed value between 2° and 3°.
- Such a transverse flare of the handle 2 is particularly advantageous since it helps hold the knife in the hand during use.
- the transverse flare prevents the hand from sliding relative to the handle, in particular for a rearward translation, that is to say -say in the direction of the blade towards the handle.
- the particular transverse flare that is offered guarantees the user comfort in handling the knife.
- the sensation of the user's hand on the handle 2 is in fact not disturbed by an aggressive geometry and/or elements complementary to the handle which would aim to help maintain the hand on the handle.
- such a transverse flare makes it possible to mobilize all the fingers of the hand when gripping the knife by the user, in particular the fingers intended to be furthest from the blade (ring finger, little finger). Furthermore, the lower force exerted by the distant fingers is compensated by the fact that the handle height is greater (due to the transverse flare angle P), which makes it possible to guarantee a uniform grip, whatever the or the finger considered.
- the transverse flare angle P is different from the longitudinal flare angle a where appropriate.
- a sort of asymmetry is created in the geometry of the handle which makes it possible to strengthen the grip by the user, and reinforce the locking function of the hand during a translation movement of the knife according to the direction longitudinal L.
- this asymmetry prevents the knife from rotating in the hand around its longitudinal axis.
- the handle height of the main gripping portion 200 at the level of the connection with the junction portion 100 preferably has a value between 17 mm and 22 mm, preferably a value between 18 mm and 21 mm, more preferably of the order of 20 mm.
- the junction portion 100 comprises an upper junction section 121 extending substantially in the extension of the back of the blade 11 in the longitudinal plane, the upper junction section 121 connecting the back of the blade 11 to the upper edge 221 of the main gripping portion 200.
- the junction portion 100 further comprises a lower junction edge 122 extending in the longitudinal plane and opposite the upper junction edge 121, the lower junction edge 122 connecting the proximal end of the blade to the lower edge 222 of the main gripping portion 200.
- junction portion 100 comprises two junction flanks 123 respectively on either side of the longitudinal plane and extending between the upper junction section 121 and the lower junction section 122.
- the junction portion 100 is commonly called a miter in dedicated language.
- each junction flank 123 is formed of an upper junction flank portion 1231 connected to the upper junction edge 121 and of a lower junction flank portion 1232 connected to the junction edge lower 122.
- the upper junction flank portion 1231 being connected to the lower junction flank portion 1232 via a gripping edge junction 1233 projecting transversely and constituting the zone of the outermost junction flank transversely in relation to the longitudinal plane.
- junction gripping edge 1233 is preferably positioned specifically to fit in the interphalangeal line of the user, more precisely in the interphalangeal line of the thumb and/or index finger.
- junction height HJ is defined corresponding to the distance in the longitudinal plane between the lower junction section 122 and the upper junction section 121 at a given position in the longitudinal direction L .
- the lower junction arrow FiJ as the distance in the longitudinal plane between the lower junction edge 122 and the projection of the junction gripping edge 1233 in the longitudinal plane at a position given in the longitudinal direction L.
- the upper junction arrow FsJ corresponds to the distance in the longitudinal plane between the upper junction edge 121 and the projection of the junction gripping edge 1233 in the longitudinal plane at a position given in the longitudinal direction L.
- the junction portion 100 is specifically formed so that the positioning of the junction gripping edge 1233 is such that the ratio between the lower junction arrow FiJ and the junction height HJ is decreasing in the longitudinal direction L starting from the blade 1 towards the main gripping portion 200.
- the ratio between the lower junction arrow FiJ and the junction height H J has a maximum value of between 35% and 55%, preferably a maximum value of between 45% and 50%.
- This maximum value of the ratio corresponds to the end point of the junction gripping edge 1233 which is on the side of the blade, that is to say in the front part of the junction portion 100.
- the ratio between the lower junction arrow FiJ and the junction height HJ has a minimum value equal to the value of the ratio between the lower arrow Fi and the handle height H of the main gripping portion 200. Indeed, this minimum value of the ratio is found at the other end point of the junction gripping edge 1233 which is on the side of the main gripping portion 200.
- junction gripping edge 1233 and the gripping edge 2233 form a continuous line at the level of the connection zone between the junction portion 100 and the main gripping portion 200. This makes it possible to guarantee a good feeling of grip. grip for the user and the function of the gripping edge is maintained regardless of the portion of the handle 2 considered.
- Each junction gripping edge 1233 is preferably curved, and may include an inflection point at which a change in concavity is present.
- the point of inflection is rather placed in the rear part of the junction portion 100, that is to say on the side of the main gripping portion 200.
- the projection of the point of inflection in the longitudinal plane is at a distance from the main gripping portion of between 5 mm and 10 mm, preferably between 6 mm and 9 mm.
- the junction gripping edge 1233 makes it possible on the one hand to secure the grip of the knife by the user because it prevents the rotation of the handle on itself in the user's hand.
- junction gripping edge 1233 also makes it easier for a user to cut food in a direction substantially perpendicular to the longitudinal direction L of the blade. Due to the decrease in the ratio between the lower junction arrow FiJ and the junction height HJ, the junction gripping edge 1233 is inclined relative to the gripping edge 2233, which creates an opposition when the cutting is carried out according to the longitudinal direction L of the knife. This phenomenon is accentuated when the junction gripping edge 1233 has a curved shape, in particular with an inflection point. Thanks to the 1233 junction gripping edge, cutting is made easier and the user's hand is better held in place because it does not slip.
- the junction gripping edge 1233 is sufficiently protruding to fit well into the interphalangeal fold when a user takes the knife in hand.
- the junction gripping edge angle 9J which is the internal angle formed between the upper junction flank portion 1231 and the lower junction flank portion 1232 is preferably less than 160°, preferably still between 120° and 150°, and preferably still between 135° and 145°.
- the junction portion 100 of the handle 2 has a shape having a longitudinal flare extending from the blade in the longitudinal plane and defined by a longitudinal junction flare angle aJ formed between the lower junction edge 122 and the upper junction edge 121, the longitudinal junction flare angle aJ, as illustrated in Figure 8.
- the longitudinal junction flare angle aJ has a fixed value which is between 15° and 20°.
- this longitudinal flare specifically provided at the level of the portion grip 100 is particularly advantageous since it makes it possible to guarantee that the knife is held in the hand during its use, and in particular avoids slipping, in particular when the user has a knife grip very close to the blade, for example a gripped.
- the junction portion 100 of the handle 2 has a shape presenting a transverse flare extending from the blade and defined by an angle d transverse junction flare 0J formed between the two junction gripping edges 1233 of the junction portion of the handle.
- the transverse junction flare angle 0J has a fixed value of between 15° and 20°.
- the transverse flare angle of junction 0J is different from the longitudinal flare angle of junction aJ where applicable.
- a sort of asymmetry is created in the geometry of the handle which makes it possible to strengthen the grip by the user, and reinforce the locking function of the hand during a translation movement of the knife according to the direction longitudinal L.
- the upper junction edge 121 extends along a straight line since it is an extension of the back of the blade 11. It should be noted that the upper junction edge 121 of the junction portion 100 and the upper edge 221 of the main gripping portion 200 form a single straight line which extends the back of the blade 11.
- the lower junction section 122 extends along a curve.
- the lower junction edge 122 has a edge inflection point at which a change in concavity is present.
- the curvature of the lower junction edge 122 combined with the junction flanks 123 form a recession provided in particular for the positioning of the index finger.
- This recession can for example be positioned as follows: it arises from the proximal portion 13 (or heel) of the blade gradually thickening towards the main gripping portion 200 and gradually joins this main gripping portion 200. In this way, lower junction edge 122 makes it possible to avoid injuring the back of the index finger against the heel of the blade 1 when the hand moves the knife forward.
- the cross section of this recession can, according to a preferred embodiment, comprise 3 distinct zones which are connected together by a tangency so as not to create an edge which could injure the index finger.
- the central zone corresponding to the lower junction edge 122 has a large radius of curvature which will reduce as it advances towards the heel, the width of this zone is such that it allows the knife to balance on its own when it is placed in the distal interphalangeal joint. That is to say, once the index finger is in position in the recession zone, the knife tilts neither to the left nor to the right.
- the lateral zones corresponding to the junction sides 123 become thinner by joining the blade 1 allowing the index finger to bend naturally around the shape while respecting the shape of the interphalangeal fold.
- the cross section of the recession is therefore broken down into the part corresponding to the lower junction section 122 of which the junction flanks 123 extend on either side, with in particular a change in curvature between the elements.
- the knife is shaped so that the center of gravity of the knife is in the junction portion, in particular at the level of the recession trough zone, that is to say the junction zone or height HJ of the junction portion has its minimum value.
- the junction height HJ of the junction portion 100 has a minimum value between 14 mm and 18 mm, preferably between 15 mm and 16 mm.
- the end portion 300 comprises an upper end edge 321 extending substantially in the extension of the blade spine 11 in the longitudinal plane, the upper end edge 321 being connected to the upper edge 221 of the main gripping portion 200.
- the end portion 300 further comprises a lower end edge 322 extending in the longitudinal plane and opposite the upper end edge 321, the lower end edge being connected to the lower edge 222 of the main gripping portion 200.
- the end portion 300 comprises two end flanks 323 respectively on either side of the longitudinal plane and extending between the upper end edge 321 and the lower end edge 322.
- each end flank 323 is formed of an upper end flank portion 3231 connected to the upper end edge 321 and of a lower end flank portion 3232 connected to the lower end edge 322.
- the upper end flank portion 3231 is connected to the lower end flank portion 3232 via an end gripping edge 3233 projecting transversely and constituting the zone of the sidewall. outermost end transversely to the longitudinal plane.
- the end gripping edge 3233 is preferably positioned specifically to fit into the interphalangeal line of the user.
- the end height HE is defined corresponding to the distance in the longitudinal plane between the lower end section 322 and the upper end section 321 at a given position according to the longitudinal direction L.
- the lower end arrow FiE as the distance in the longitudinal plane between the lower end edge 322 and the projection of the end gripping edge 3233 in the plane longitudinal at a given position in the longitudinal direction L.
- the upper end arrow FsE corresponds to the distance in the longitudinal plane between the upper end edge 321 and the projection of the end gripping edge 3233 in the longitudinal plane at a given position in the longitudinal direction L.
- the end portion 300 is specifically shaped so that the positioning of the end gripping edge 3233 is such that the ratio between the lower end arrow FiE and the height of end HE is decreasing in the longitudinal direction L starting from a free end of the end portion 300 towards the main gripping portion 200.
- the ratio between the lower end arrow FiE and the end height HE has a minimum value between 0% and 10%, preferably a minimum value between 2% and 5%. Furthermore, the ratio between the lower end arrow FiE and the end height HE has a maximum value equal to the value of the ratio between the lower arrow Fi and the height H of the main gripping portion 200.
- the end gripping edge 3233 and the gripping edge 2233 form a continuous line at the level of the connection zone between the end portion 300 and the main gripping portion 200. This makes it possible to guarantee good sensation of grip for the user and the function of the gripping edge is maintained regardless of the portion of the handle 2 considered.
- Each end gripping edge 3233 is curved and has no inflection point.
- the end gripping edge 3233 makes it possible on the one hand to secure the grip of the knife by the user because it prevents the rotation of the handle on itself in the user's hand.
- the end gripping edge 3233 is inclined relative to the gripping edge 2233, which creates an opposition when the cutting is carried out in the longitudinal direction L of the knife. This phenomenon is accentuated when the end gripping edge 3233 has a curved shape. Thanks to the 3233 end gripping edge, cutting is made easier and the user's hand is better held in place because it does not slip.
- the end gripping edge 3233 is sufficiently protruding to fit well into the interphalangeal fold when a user takes the knife in hand.
- the end gripping edge angle 9E which is the internal angle formed between the upper end flank portion 3231 and the lower end flank portion 3232 is preferably less than 160° , more preferably between 120° and 150°, and more preferably between 135° and 145°.
- the upper end edge 321 extends along a straight line since it is an extension of the back of the blade 11. It should be noted that the upper end edge 321 of the end portion 300 and the upper edge 221 of the main gripping portion 200 form a single straight line which extends the back of the blade 11.
- the lower end section 322 can extend in a curve.
- the lower end edge 322 has no point of inflection. Gorges
- the handle 2 comprises a plurality of grooves 400 formed on at least one of the handle sides 23.
- the grooves 400 are distinct from each other, the plurality of grooves 400 comprising a reference groove 410 positioned closest to the blade and the other grooves 400 being arranged next to each other from the groove of reference 410 along the handle 2 towards a free end of the handle 2 opposite the blade 1.
- Each groove 400 extends over a certain length and can be straight as in the example of a knife illustrated in Figures 12 to 17, or be curved as in the example of a knife illustrated in Figures 18 to 21. It should be noted that It could be considered a specific handle design with straight grooves and other curved grooves.
- Each groove 400 has a certain width and a certain depth from the surface of the corresponding handle flank 23.
- the groove 400 generally has a fixed width, as in particular for the case of a straight groove, but could also have a variable width, in particular for a curved groove.
- the maximum width has a value of at least 2 mm, and is preferably at most equal to 10 mm.
- Each groove 400 can have a different profile, but the grooves 400 generally have an indicated profile, the profile of a groove 400 is defined in particular in relation to its cross section.
- a cross section can for example have a rectangular shape, or an arc of a circle, or an elliptical arc.
- Each groove 400 also has a maximum depth, this maximum depth being at least equal to 0.2 mm. More preferably, the maximum depth is not greater than 1 mm.
- the maximum depth is at most equal to one third of the maximum width defined above.
- the maximum depth has a value between 5% and 12% of the value of the maximum width, preferably between 6% and 11%, for example of the order of 10%.
- the maximum width is between 2.5 mm and 6.5 mm, preferably between 3.5 mm and 5 mm, and the maximum depth is between 0.25 mm and 0.5 mm, preferably between 0.35 mm and 0.45 mm.
- each groove 400 of the handle we can define an average direction of extension 401.
- We define more specifically such an average direction of extension as the straight line passing through the middle of each of the sides forming the ends of the groove 400 considered. .
- each groove 400 has been shown in dotted lines in Figure 16 for an example of handles with straight grooves, and in Figure 21 for an example of handles with curved grooves.
- each of the grooves 400 can be defined using this average direction of extension 401.
- the groove angle y corresponding to the angle formed between the projection in the longitudinal plane of the average direction of extension 401 and the longitudinal direction L.
- the arrangement of the different grooves 400 can be defined in relation to the reference groove 410.
- a reference groove 410 is oriented according to a reference groove angle yR which is preferably between 0° and 10°.
- the reference groove angle yR is between 2° and 6°.
- Each subsequent groove 400 of the plurality of grooves has a groove angle y greater than the reference groove angle yR, the respective groove angles y of two adjacent grooves 400 being different.
- the respective groove angles y of two adjacent grooves 400 differ by an angle of at least 1°, and preferably an angle between 4° and 8°, more preferably an angle between 5° and 7°.
- each groove 400 of the plurality of grooves has, in the direction going from the reference groove 410 towards the free end of the handle 2, a groove angle y greater than the angle of gorge y of the previous gorges.
- the groove angle y of the plurality of grooves 400 first increases relative to the reference groove angle yR as the distance from the corresponding groove increases. relative to the reference groove 410, then decreasing arriving towards the free end of the handle 2.
- the examples of handles in Figures 12 to 16 and Figures 17 to 21 correspond to this particular arrangement.
- the use of grooves 400 with the specific geometry, orientation and arrangement proposed is particularly advantageous since it makes it possible to reinforce the adhesion of the user's hand to the knife, which improves the grip on the one hand and makes cutting easier while guaranteeing user safety, in particular preventing the hand from slipping in relation to the handle.
- the shape and orientation of the grooves 400 in particular allows the hand to conform well to the external shape of the handle, and increases the contact surface with the surface of the hand.
- the specific orientation of the grooves 400 also has the particular advantage of creating zones opposing the movement imparted by the user with his hand when cutting food.
- the grooves 400 which are placed on the front side of the handle 2, that is to say on the side of the blade, have an orientation substantially parallel to the longitudinal direction L, or slightly inclined relative to the longitudinal direction L
- These grooves 400 thus make it possible to facilitate the cutting of food by a user in a direction substantially perpendicular to the longitudinal direction L of the blade. It should be noted that such cutouts are generally provided from the front of the handle, that is to say towards the junction portion.
- the grooves 400 will tend to straighten out to have a more marked inclination with respect to the longitudinal direction L, for example with angles of the order of 25° or more, which gives to the corresponding grooves 400 an additional advantage, namely promoting the cutting of food by a user in a direction substantially perpendicular to the longitudinal direction L of the blade, but also in a direction of translation in the longitudinal direction L.
- a first part of the grooves 400 are curved with a concavity oriented towards the upper handle edge 21 and a second part of the grooves 400 of the plurality of grooves are curved with a concavity oriented towards the side of the lower handle edge 22.
- the first part of the grooves 400 having a concavity oriented towards the upper handle edge 21 are preferably arranged together, on the front side of the handle, that is to say close to the blade 1.
- the second part of the grooves 400 having a concavity oriented towards the lower handle edge 22 are also preferably arranged together, on the rear side of the handle, that is to say close to the free end of the handle 2 .
- the fact that the grooves 400 have such a change in concavity makes it possible to further promote cutting, particularly during cutting in translation along the longitudinal direction L. Indeed, during such cutting going towards the rear of the knife (that is to say in the direction of the blade towards the handle), then the effort exerted by the hand is rather concentrated towards the front of the handle 2, and the concavity of the grooves 400 positioned at the The front of the handle 2 thus promotes cooperation between the hand and the handle during cutting.
- each handle side could only be provided on one of the two sides of the handle.
- each handle side includes a plurality of grooves.
- the grooves 400 of one of the handle sides 23 are symmetrical to the grooves 400 of the other of the handle sides 23 with respect to the longitudinal plane. This makes it possible to offer an ambidextrous knife, which can be used with both the right hand and the left hand.
- the grooves are preferably formed in the upper handle sidewall portion 231 of the sidewall. handle 23 corresponding.
- One of the advantages of the proposed knife is that its design is based on principles that are adaptable to all sizes and shapes of knives.
- small knives are for example paring knives or paring knives
- large knives are for example chef's knives, santoku knives, bread knives, or slicing knives.
- the example of knife illustrated in Figures 1 to 4 corresponds to a chef-type knife, in which several combined design parameters among those described above have been applied, namely the proposed longitudinal flare, the proposed transverse flare, and the formation of a specific gripping edge.
- the example of knife illustrated in Figures 12 to 15 also corresponds to a chef type knife, in which several combined design parameters among those described above have been applied, namely the proposed longitudinal flare, the proposed transverse flare, the formation of a specific gripping edge, and the provision of grooves, these grooves being straight.
- the example of knife illustrated in Figures 17 to 20 also corresponds to a chef-type knife, in which several combined design parameters among those described above have been applied, namely the proposed longitudinal flare, the proposed transverse flare, the formation of a specific gripping edge, and the provision of grooves, these grooves being curved.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Knives (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2213388A FR3143406B1 (fr) | 2022-12-14 | 2022-12-14 | Couteau de cuisine |
| PCT/FR2023/051982 WO2024126940A1 (fr) | 2022-12-14 | 2023-12-12 | Couteau de cuisine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4633884A1 true EP4633884A1 (fr) | 2025-10-22 |
| EP4633884B1 EP4633884B1 (fr) | 2026-04-15 |
Family
ID=85461743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23836902.9A Active EP4633884B1 (fr) | 2022-12-14 | 2023-12-12 | Couteau de cuisine |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP4633884B1 (fr) |
| JP (1) | JP7337296B1 (fr) |
| KR (1) | KR20250120418A (fr) |
| CN (1) | CN120513156A (fr) |
| AU (1) | AU2023395302A1 (fr) |
| CO (1) | CO2025009116A2 (fr) |
| FR (1) | FR3143406B1 (fr) |
| MX (1) | MX2025006964A (fr) |
| WO (1) | WO2024126940A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134448Y2 (fr) * | 1974-02-13 | 1976-08-25 | ||
| JPS5931376U (ja) * | 1982-08-24 | 1984-02-27 | 加藤 俊男 | 台所用品の柄 |
| DE3932050A1 (de) * | 1989-09-26 | 1991-04-04 | Guede Franz Gmbh | Messer mit kunststoffhandgriff |
| JPH04102965U (ja) * | 1991-02-05 | 1992-09-04 | 廣昭 川畑 | 包 丁 |
| AU119833S (en) * | 1993-02-06 | 1994-04-06 | Mcphersons Ltd | Knife |
| TWM406998U (en) * | 2011-02-01 | 2011-07-11 | Rui-Bin Lai | Tableware structure |
| FR2997335B1 (fr) * | 2012-10-25 | 2014-12-05 | Gabriel Schumacher | Couteau a manche en pierre naturelle pleine masse et formes asymetriques et procede de fabrication d’un tel couteau |
| US11931912B2 (en) | 2020-10-05 | 2024-03-19 | Steelport Kitchenware, Inc. | Kitchen knife |
-
2022
- 2022-12-14 FR FR2213388A patent/FR3143406B1/fr active Active
-
2023
- 2023-02-09 JP JP2023018269A patent/JP7337296B1/ja active Active
- 2023-12-12 KR KR1020257023303A patent/KR20250120418A/ko active Pending
- 2023-12-12 CN CN202380091261.6A patent/CN120513156A/zh active Pending
- 2023-12-12 EP EP23836902.9A patent/EP4633884B1/fr active Active
- 2023-12-12 WO PCT/FR2023/051982 patent/WO2024126940A1/fr not_active Ceased
- 2023-12-12 AU AU2023395302A patent/AU2023395302A1/en active Pending
-
2025
- 2025-06-13 MX MX2025006964A patent/MX2025006964A/es unknown
- 2025-07-04 CO CONC2025/0009116A patent/CO2025009116A2/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CO2025009116A2 (es) | 2025-08-19 |
| MX2025006964A (es) | 2025-07-01 |
| AU2023395302A1 (en) | 2025-07-17 |
| FR3143406A1 (fr) | 2024-06-21 |
| KR20250120418A (ko) | 2025-08-08 |
| CN120513156A (zh) | 2025-08-19 |
| JP2024085356A (ja) | 2024-06-26 |
| JP7337296B1 (ja) | 2023-09-01 |
| FR3143406B1 (fr) | 2024-11-29 |
| WO2024126940A1 (fr) | 2024-06-20 |
| EP4633884B1 (fr) | 2026-04-15 |
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