Knife

Abstract

The present application provides a knife. The knife comprises a main body part and a cutter part. A cutting edge is formed on the side of the cutter part away from the main body part. The knife has a first surface and a second surface which are opposite to each other. At least one of the first surface and the second surface is provided with a plurality of grooves which are distributed in the length direction of the knife and extend upwards from the cutting edge. The knife according to the present application can be durably sharp, and has good durable sharpness performance.

Description

[0001] The present application relates to the technical field of kitchen knives, and in particular, to a kitchen knife.

[0002] Knives play a very important role in daily kitchen utensils. Currently, most kitchen knives are made of a combination of carbon steel, stainless steel, ceramic material, etc.. However, such knives have inadequate sharpness. Their sharpness can only be increased by thinning the cutting edge. But this method will greatly affect the durable sharpness of the knives.

[0003] Therefore, an objective of the present application is to provide a knife to solve the problem in the prior art that knives have poor durable sharpness. On the basis of existing knives, a plurality of grooves are formed on the cutter part of a knife, which are distributed in the length direction and extend upward from the cutting edge. By providing the grooves, the contact area between the cutting edge and food is reduced. Given the same force applied, the pressure exerted by the cutting edge of the cutter part on a food ingredient is greater, making it easier for the cutting edge to cut into the food ingredient, thereby enabling the knife to have better sharpness. Since the grooves have a certain extension length, during subsequent use, a user can obtain good sharpness again after sharpening the knife, so that the knife can have good durable sharpness.

[0004] According to a first aspect of the present application, a knife is provided, comprising a main body part and a cutter part, a cutting edge being formed at a side of the cutter part away from the main body part, the knife having a first surface and a second surface, which are opposite to each other, at least one of the first surface and the second surface being provided with a plurality of grooves that are distributed in a length direction of the knife and extend upwards from the cutting edge.

[0005] In some embodiments, the first surface and the second surface are both provided with a plurality of grooves, the grooves on the two surfaces being staggered in the length direction of the knife.

[0006] In some embodiments, the grooves extend upwards at a preset angle, the preset angle being the angle between an extension direction of the grooves and the cutting edge.

[0007] Specifically, the angle is 60° to 120°. Further, the angle is 90°.

[0008] In some embodiments, the grooves are recessed inwardly in a thickness direction of the knife, with a depth of recession of 10 µm to 100 µm.

[0009] In some embodiments, the grooves are in the shape of an elongated strip.

[0010] In some embodiments, the grooves have a width of 0.5 mm to 1.5 mm, the grooves extend upwards by a length of 0.5 mm to 5 mm, and there is a spacing of 0.5 mm to 1.5 mm between adjacent grooves.

[0011] In some embodiments, the grooves are in the shape of an arc or a triangle.

[0012] In some embodiments, the cutting edge has a micro-serrated structure distributed in the length direction of the knife.

[0013] In some embodiments, the knife is made of a carbon steel, martensitic stainless steel or ceramic material.

[0014] With the knife according to the present application, by forming a plurality of grooves on the surface of the cutter part of the knife, which are distributed in the length direction and extend upward from the cutting edge, the contact area between the cutting edge and food is reduced. Thus, given the same force applied, the pressure exerted by the cutting edge of the cutter part of the knife according to the present application on a food ingredient is greater, making it easier for the cutting edge to cut into the food ingredient, thereby enabling the knife to have better sharpness. Since the grooves have a certain extension length, during subsequent use, a user can obtain good sharpness again after sharpening the knife, so that the knife can have good durable sharpness.Brief description of the drawings

[0015] The above and other objectives and features of the present application will become more apparent through the following description of embodiments in reference to the accompanying drawings, in which: Figure 1 is a schematic structural view in perspective of a knife according to an embodiment of the present application; Figure 2 is an enlarged structural schematic view of the part I in Figure 1; Figure 3 is a schematic view of the knife when it is laid flat according to an embodiment of the present application; Figure 4 is an enlarged structural schematic view of the part J in Figure 3; Figure 5 is a schematic structural view of grooves in a knife according to another embodiment of the present application; Figure 6 is a schematic structural view of grooves in a knife according to yet another embodiment of the present application. List of reference numerals

[0016] 10: knife; 11: main body part; 12: cutter part; 121: cutting edge; 122: groove.Detailed description of the embodiments

[0017] The following specific embodiments are provided to help those skilled in the art to acquire a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0018] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. On the contrary, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0019] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0020] Although terms such as "first," "second" and "third" may be used herein to describe various members, components, regions, layers or parts, these members, components, regions, layers or parts should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer or part from another member, component, region, layer or part. Therefore, without departing from the teachings of the examples, the first member, first component, first region, first layer or first part referred to in the examples described herein may also be referred to as the second member, second component, second region, second layer or second part.

[0021] In the specification, when an element such as a layer, region or substrate is described as being "on," "connected to" or "bonded to" another element, the element may be directly "on," "connected to" or "bonded to" another element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on," "directly connected to" or "directly bonded to" another element, there may be no other elements in between.

[0022] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise," "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof. The term "plurality" represents any number of two and more than two.

[0023] The definitions of directional words such as "upper," "lower," "top" and "bottom" in the present application are based on the orientation of a product when it is placed upright in normal use.

[0024] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meanings as those generally understood by those skilled in the art to which the present application belongs after understanding the present application. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and the present application, and should not be interpreted in an idealized or overly formal way.

[0025] In addition, in the description of examples, when it is believed that a detailed description of the well-known related structure or function will cause an ambiguous interpretation of the present application, such detailed description will be omitted.

[0026] As is well known, the harder the material of a knife is, the less likely it is for its cutting edge to roll, but if the material is too hard, the cutting edge of the knife may chip or fracture. For a knife, having both high toughness and high hardness enable the knife to have better durable sharpness. To this end, the present application aims to provide a knife with durable sharpness.

[0027] The present inventor has found through research that by forming a plurality of grooves, which are distributed in the length direction and extend upward from the cutting edge, on the surface of the cutter part of a knife, the contact area between the cutting edge and food can be reduced. In this way, given the same force applied, compared to a knife of the prior art that has a flat cutting edge, the pressure exerted by the cutting edge of the cutter part of the knife according to the present application on a food ingredient is greater, making it easier for the cutting edge to cut into the food ingredient. Hence, such a knife has better sharpness. Since the grooves have a certain extension length, during subsequent use, a user can obtain good sharpness again after sharpening the knife. Thus, the knife can have good durable sharpness.

[0028] The inventive concept of the present application will be described in detail below in reference to exemplary embodiments.

[0029] According to a first aspect of the present application, a knife is provided. As shown in Figures 1 and 2, the knife 10 has a certain length, width and thickness, and comprises a main body part 11 and a cutter part 12. The main body part 11 extends in the length direction. The cutter part 12 is arranged on one side of the main body part 11 in the width direction and extends in the length direction. The cutter part 12 has one side adjacent to the main body part 11 and the other side away from the main body part 11. The cutter part 12 has a cutting edge 121 on said the other side. The knife 10 has a first surface and a second surface, which are opposite to each other. At least one of the first surface and the second surface is provided with a plurality of grooves 122 distributed in the length direction and extending upward from the cutting edge 121.

[0030] It should be noted that the cutter part 12 and the main body part 11 can be formed integrally. Here, the cutter part 12 and the main body part 11 are distinguished for the convenience of description. However, the present application is not limited thereto. The cutter part 12 and the main body part 11 according to the present application can also be two parts connected to each other. According to the present application, the grooves extend upward from the cutting edge, that is, extend from the position of the cutting edge of the cutter part 12 toward the knife body, thereby forming recessed grooves 122.

[0031] According to the present application, the grooves can be formed on a knife by existing methods to form a knife according to the present application. In some embodiments, the plurality of grooves 122 are formed by laser processing. Specifically, the recessed grooves 122 are formed by laser extending upward along the cutting edge. Forming the grooves 122 by laser processing can enhance the strength of the inner wall of the grooves 122, thereby making the strength of the cutter part 12 higher.

[0032] Figure 3 is a schematic structural view of the knife when it is laid flat according to an embodiment of the present application. Figure 4 is an enlarged schematic structural view of part J in Figure 3. As shown in Figures 3 and 4, the first surface and the second surface are both provided with a plurality of grooves 122. The grooves 122 on the two surfaces are staggered in the length direction of the knife 10. The grooves 122 on the upper surface and the grooves 122 on the lower surface are arranged alternately in the length direction on the two surfaces of the knife.

[0033] In these embodiments, by staggering the grooves on the two surfaces in the length direction of the knife 10, the arrangement of the grooves does not affect the strength of the cutting edge 121.

[0034] According to the present application, the grooves 122 are distributed on the cutter part 12 in a regular way, so that the sharpness of the knife can be distributed more evenly.

[0035] According to the present application, the grooves can be of any shape. By way of example, the grooves 122 can be in the shape of an elongated strip, an arc or a triangle. The grooves of the present application will be described in detail below, taking elongated strip shaped grooves as an example, and grooves of other shapes will be briefly described later.

[0036] In some embodiments, the groove 122 is in the shape of an elongated strip and can extend upward at a preset angle. The preset angle is the angle between the extension direction of the grooves 122 and the cutting edge 121. In an exemplary embodiment, the angle is 60° to 120°. If the angle between the extension direction of the grooves 122 and the cutting edge 121 is less than 60° or greater than 120°, the cutting resistance against the knife during cutting is large, resulting in a poor user experience for consumers. In addition, a large cutting resistance will render the grooves 122 prone to wear, thereby affecting durable sharpness.

[0037] As shown in Figure 2, the angle between the grooves 122 and the cutting edge 121 is 90°. In other words, the grooves 122 extend from the cutting edge 121 in the width direction. By arranging the grooves 122 to extend upward in the width direction, the cutting resistance against the knife is small, and the grooves 122 cannot easily be worn by use. In addition, the knife thus formed can have a good appearance.

[0038] In some embodiments, the depth of recession of the grooves 122 (i.e., the depth of recession of the grooves in the thickness direction) is 10 µm to 100 µm. If the depth of recession of the grooves 122 is small, the durable sharpness will not be significantly improved. If the depth of recession of the grooves 122 is big, both the strength of the cutter part and the durable sharpness will be reduced.

[0039] In some embodiments, the width W of the grooves 122 is 0.5 mm to 1.5 mm. If the width of the grooves 122 is small, the durable sharpness is not significantly improved. If the width of the grooves 122 is large, both the strength of the cutter part and the durable sharpness will be reduced.

[0040] In some embodiments, the grooves 122 extend upward by a length L of 0.5 mm to 5 mm. If the length of the grooves 122 is small, they can easily be worn, resulting in a decrease in durable sharpness. If the length of the grooves 122 is large, the manufacturing cost will be high.

[0041] In some embodiments, the spacing H between adjacent grooves 122 is 0.5 mm to 1.5 mm. If the spacing of the grooves 122 is small or large, the durable sharpness will not be significantly improved.

[0042] In other embodiments, the grooves 122 can be in the shape of an arc or triangle. Figure 5 is a schematic structural view of the grooves in the knife according to another embodiment of the present application. Figure 6 is a schematic structural view of the grooves in the knife according to yet another embodiment of the present application. As shown in Figure 5, the grooves 122 are in the shape of a triangle. In exemplary embodiments, the length L1 of the bottom of the triangular grooves is 0.5 mm to 1.5 mm, and the height H1 is 0.5 mm to 5 mm. As shown in Figure 6, the grooves 122 are in the shape of an arc. In exemplary embodiments, the arc of the grooves intersects with the cutting edge 121 at points A and B, wherein the distance between points A and B (i.e., the chord length) is 0.5 mm to 1.5 mm, and the distance between points C and D (i.e., the chord height) is 0.5 mm to 5mm.

[0043] As shown in Figures 1 and 2, the cutting edge 121 has a micro-serrated structure distributed in the length direction. According to the present application, the height of each tooth of the micro-serrated structure is in the range of 100 µm to 200 µm, and the width thereof is in the range of 100 µm to 200 µm. According to the present application, the shape of the micro-serrated structure can be set according to actual needs, and the present application does not require that it must be formed as a rack-like structure in the length direction of the knife. The micro-serrated structure according to the present application, is for example, but not limited to, a continuous wavy structure formed in the extension direction of the cutting edge of the knife. In the micro-serrated structure according to the present application, in the thickness direction of the knife, the tooth of each micro-serrated structure can be an inverted cone structure. It should be noted that the tip of the micro-serrated structure of the present application can be selected according to actual needs, for example, but not limited to, based on the application of the knife and the cutting requirements of the knife (hardness of the object to be cut, etc.). The extension direction of the cutting edge of the knife can be strip-shaped or arc-shaped (see the drawings). When the extension direction of the cutting edge of the knife is strip-shaped, it is consistent with the length direction of the knife. In these embodiments, when the cutting edge of the micro-serrated structure impacts a hard material, the force-bearing mode is point force-bearing. Compared with the continuous arc-shaped cutting edge structure with line force-bearing mode, it can have better sharpness.

[0044] In some embodiments, the knife 10 is made of a carbon steel, stainless steel or ceramic material. In some exemplary embodiments, the stainless steel can be martensitic stainless steel, which can include 3Cr13 stainless steel, 4Cr13 stainless steel, 5Cr15MoV stainless steel, 6Cr13MoV stainless steel, 7Cr17MoV stainless steel and 102Cr17MoV stainless steel. The ceramic material can be zirconium oxide.

[0045] According to a second aspect of the present application, a method for manufacturing a knife is provided. The method for manufacturing a knife comprises the following steps: step S101, providing a knife; step S102, forming a plurality of grooves on the surface of the cutter part of the knife by laser processing.

[0046] According to some embodiments of the present application, the method of the laser processing is briefly described as follows: 1. Setting the following parameters of a laser device: (1) water cooling power: 1,300W to 1,500W; (2) spot size: 5 µm; (3) device power: 2,000W to 3,000W; (4) wavelength: 300 nm to 400 nm; (5) spot movement speed: 5 mm / s to 15 mm / s. 2. Fixing the knife on a fixture, which is provided with a plurality of starting points of grooves according to the requirements on the groove structure, namely starting point 1, starting point 2, . . . , starting point N. 3. Aligning the laser spot with a starting point on the fixture, performing an action by starting from starting point 1 in the direction from the cutting edge to the knife body, and after reaching the end of a groove, returning to starting point 1, thus completing laser processing of the first groove. 4. Moving the spot to starting point 2, repeating the process in step no. 3, and repeating this process until the production of N grooves is completed. The method for manufacturing a knife and the knife of the present invention have been described in detail above in reference to exemplary embodiments. Below the beneficial effects of the present invention will be described in more detail in reference to specific embodiments, but the scope of protection of the present invention is not limited to the embodiments.

[0047] Although embodiments of the present application have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. However, it should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of embodiments of the present application defined by the claims.

Claims

1. A knife characterized in that the knife (10) comprises a main body part (11) and a cutter part (12), a cutting edge (121) being formed at a side of the cutter part (12) away from the main body part (11), the knife (10) having a first surface and a second surface, which are opposite to each other, at least one of the first surface and the second surface being provided with a plurality of grooves (122) that are distributed in a length direction of the knife (10) and extend upwards from the cutting edge (121).

2. The knife according to claim 1, characterized in that the first surface and the second surface are both provided with a plurality of grooves (122), the grooves (122) on the two surfaces being staggered in the length direction of the knife (10).

3. The knife according to claim 1, characterized in that the grooves (122) extend upwards at a preset angle, the preset angle being the angle between an extension direction of the grooves (122) and the cutting edge (121).

4. The knife according to claim 3, characterized in that the angle is 60° to 120°.

5. The knife according to claim 1, characterized in that the grooves (122) are recessed inwardly in a thickness direction of the knife, with a depth of recession of 10 µm to 100 µm.

6. The knife according to claim 1, characterized in that the grooves (122) are in the shape of an elongated strip.

7. The knife according to claim 6, characterized in that the grooves (122) have a width of 0.5 mm to 1.5 mm, the grooves (122) extend upwards by a length of 0.5 mm to 5 mm, and there is a spacing of 0.5 mm to 1.5 mm between adjacent grooves (122).

8. The knife according to claim 1, characterized in that the grooves (122) are in the shape of an arc or a triangle.

9. The knife according to claim 1, characterized in that the cutting edge (121) has a micro-serrated structure distributed in the length direction of the knife (10).

10. The knife according to claim 1, characterized in that the knife (10) is made of a carbon steel, martensitic stainless steel or ceramic material.

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