Cutter sharpener

Abstract

To provide a cutter sharpener for polishing the cutting edge of a blade such that the cutter sharpener can be used stably.SOLUTION: A cutter sharpener comprises a body and a first polishing body, which is disposed in the body and polishes a first blade that is a first type of a blade. The body has, in the bottom surface, a bottom surface recess formed to be recessed toward the upper surface side in a width direction at a center part in a longitudinal direction. The cross section perpendicular to the longitudinal direction in the center part in the longitudinal direction of the body has a U-shape protruding downward. A first slit is formed in a groove shape in the width direction in the upper surface of the body, where the first slit guides a blade edge toward the first polishing body.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] One aspect of the present invention relates to a knife sharpener for sharpening the cutting edge of a knife.

Background Art

[0002] Conventionally, there has been an electric grindstone including a motor, a grindstone fixed to a motor shaft, and a spring. On the other hand, there has been a knife sharpening tool without a motor described in Patent Document 2, the knife sharpening tool having a configuration including a support body that supports a polishing body, a base, and an elastic member and a guide member positioned between the support body and the base.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, the three Rs, namely Reduce (cherish things and reduce waste), Reuse (repeatedly use things that can be used), and Recycle (reuse waste as resources), have been advocated. As described above, the blade cartridges in conventional razors were often formed of resin and metal, but there is a demand for replacement with materials that are easy to recycle. Also, among the 17 goals in the SDGs (Sustainable Development Goals) adopted at the United Nations Summit, Goal 12 aims to ensure sustainable production and consumption patterns as "the responsibility to produce and the responsibility to use", and it is required to significantly reduce the generation of waste. For example, Goal 12-5 aims to significantly reduce the generation of waste by preventing, reducing, recycling, and reusing waste by 2030. Under such circumstances, in the field of cutting tools including kitchen knives, it is required to reduce the generation of waste.

[0005] On the other hand, knife sharpeners (knife grinding tools) for sharpening kitchen knives were in a situation where it was hard to say that they were sufficiently popular in ordinary households. The reasons why knife sharpeners are not popular in ordinary households include the impression that they are difficult to use easily and safely, and the problem of storage space. Also, it was not easy to stably install conventional relatively compact knife sharpeners so that they do not shift, and the main body sometimes moved during use. Also, there were few knife sharpeners configured to be able to grind multiple types of knives. The present invention aims to solve at least one of these problems, popularize knife sharpeners in ordinary households, enable comfortable use of knives over a long period, and reduce the generation of waste.

Means for Solving the Problems

[0006] The present invention provides a knife sharpener having the following configuration, for example.

[0007] One means of the present invention is a main body, and A knife sharpener comprising a first abrasive for polishing a first knife, which is a knife of the first type, disposed within the body. The body has, on its bottom surface, a bottom recess formed so as to be recessed upward in the width direction at the central portion in the longitudinal direction. A cross-section of the body at the central portion in the longitudinal direction, perpendicular to the longitudinal direction, is U-shaped convex downward. On the upper surface of the body, a first slit is formed in a groove shape extending in the width direction for guiding the cutting edge toward the first abrasive. It is a knife sharpener.

[0008] According to the above knife sharpener, by providing the bottom recess, the grip performance is enhanced, and the user can stably hold the knife sharpener without displacement. Therefore, it is possible to prevent the knife sharpener from moving in the direction of sliding the knife during use, etc., and it can be used safely. At this time, in the case of a conventional configuration, a guard member for preventing the hand from slipping toward the slit side may be provided between the gripping portion gripped by the user and the slit into which the cutting edge is inserted. However, without providing such a guard member, it becomes a configuration that can be used sufficiently safely. Since the above knife sharpener does not require such a guard member, the size in the height direction can be reduced, and it becomes easy to store compactly. Also, since the force applied by the user to the knife is effectively applied to the cutting edge, the knife to be polished can be polished with a relatively light force.

[0009] Preferably, in the above knife sharpener, a second abrasive for polishing a second knife of a type different from the first knife is further disposed within the body. On the upper surface of the body, a second slit is further formed in a groove shape extending in the width direction for guiding the cutting edge toward the second abrasive. The first slit and the first abrasive are disposed on one side in the longitudinal direction of the body with respect to the central portion, and the second slit and the second abrasive are disposed on the other side in the longitudinal direction of the body with respect to the central portion.

[0010] According to the above-mentioned knife sharpener, since the first slit and the first abrasive body, and the second slit and the second abrasive body are arranged in a well-balanced manner on one side and the other side with respect to the central portion, different types of knives can be polished by the respective abrasive bodies, and a compact configuration can be achieved. In addition, since the center of gravity can be positioned near the central portion, it is less likely to be displaced and can be configured to be stable during use.

[0011] In the above-mentioned knife sharpener, preferably, the first knife has a wavy cutting edge, and the second knife has a straight or curved cutting edge.

[0012] When polishing a knife with a wavy cutting edge, the knife sharpener is particularly likely to be displaced, but with the above-mentioned knife sharpener, its position can be stabilized during use. In recent years, high-quality bread has become more widely distributed than before, and accordingly, the frequency of using a wave-edge kitchen knife with a wavy cutting edge has increased. However, it is possible to provide a knife sharpener that can polish both such a wave-edge kitchen knife and a knife with a straight or curved cutting edge.

[0013] In the above-mentioned knife sharpener, preferably, a third abrasive body for polishing the second knife is further arranged in the main body, On the upper surface of the main body, a third slit is further formed in a groove shape extending in the width direction to guide the cutting edge toward the third abrasive body, The third slit and the third abrasive body are arranged on the other side in the longitudinal direction of the main body with respect to the central portion.

[0014] According to the above-mentioned knife sharpener, as a configuration including the second abrasive body and the third abrasive body as abrasive bodies for polishing the second knife with a straight or curved cutting edge, a configuration can be achieved in which the second knife with a higher usage frequency can be effectively polished. In addition, since the second slit, the second abrasive body, the third slit, and the third abrasive body for polishing the second knife are arranged adjacent to the other side of the central portion, a configuration is obtained in which the second knife can be easily polished.

[0015] In the above-mentioned knife sharpener, preferably, the main body is substantially a rectangular parallelepiped.

[0016] According to the above-mentioned knife sharpener, since a more compact configuration can be achieved, it can be easily accommodated, for example, in a kitchen drawer, etc., and has a configuration that is easy to accommodate.

[0017] In the above-mentioned knife sharpener, preferably, the bottom concave portion is formed symmetrically with respect to the center in the width direction of the main body.

[0018] According to the above-mentioned knife sharpener, when the first polishing body and the second polishing body are respectively arranged on one side and the other side with respect to the central portion in the longitudinal direction, no matter which polishing body is used, it is possible to form a configuration in which it is easy to hold the main body by hanging a finger on the bottom concave portion. Also, it is possible to form a configuration in which the main body can be easily held regardless of the dominant hand.

[0019] One means of the present invention is a knife sharpener including a main body and a polishing body disposed in the main body, wherein the main body has a bottom concave portion formed on the bottom surface so as to be recessed toward the upper surface side across the central portion in the longitudinal direction, a cross section of the main body at the central portion in the longitudinal direction perpendicular to the longitudinal direction is in a U shape convex downward, on the upper surface of the main body, a slit is formed in a groove shape across the width direction to guide the cutting edge toward the polishing body, on the upper surface of the main body, no member protruding upward is provided, which is a knife sharpener.

[0020] According to the above-mentioned knife sharpener, by adopting a configuration with a concave bottom surface, the grip performance is enhanced, and the user can stably hold the knife sharpener without displacement. Therefore, during use, it is possible to prevent the knife sharpener from moving in the direction of sliding the knife, etc., and it can be used safely. At this time, in the case of a conventional configuration, between the gripping portion gripped by the user and the slit into which the blade tip is inserted, a guard member is formed on the upper surface of the main body so as to protrude upward to prevent the hand from slipping toward the slit side. However, without providing such a guard member, a configuration that can be used sufficiently safely is achieved. Since the above-mentioned knife sharpener does not require such a guard member, the size in the height direction can be reduced, and it is easy to store compactly. In addition, since the force applied by the user to the knife is effectively applied to the blade tip, the knife to be polished can be polished with a relatively small force.

[0021] One means of the present invention is a main body, and a first polishing body disposed in the main body for polishing a first knife having a wavy blade tip, a second polishing body for polishing a second knife having a straight or curved blade tip, and a third polishing body for polishing the second knife. A knife sharpener comprising: the third polishing body has a finer particle size than the second polishing body, the main body has a bottom surface recess formed on the bottom surface so as to be recessed toward the upper surface across the width direction at the central portion in the longitudinal direction of the main body, the bottom surface recess is formed symmetrically with respect to the center in the width direction of the main body, a cross section of the main body at the central portion in the longitudinal direction perpendicular to the longitudinal direction is in a U-shape convex downward, on the upper surface of the main body, a first slit formed in a groove shape across the width direction for guiding the blade tip toward the first polishing body, a second slit formed in a groove shape across the width direction for guiding the blade tip toward the second polishing body, a third slit formed in a groove shape across the width direction for guiding the blade tip toward the third polishing body is formed. The first slit and the first abrasive member are arranged on one side in the longitudinal direction of the main body with respect to the central portion, and the second slit, the second abrasive member, the third slit, and the third abrasive member are arranged on the other side in the longitudinal direction of the main body with respect to the central portion. It is a knife sharpener.

[0022] In the above knife sharpener, preferably, the first abrasive member is composed of two plate-shaped grindstones. The second abrasive member is composed of a grindstone having a shape in which two frustums of a cone are connected to each other by an upper surface having an area smaller than the bottom surface. The third abrasive member is composed of two columnar grindstones.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0024] The knife sharpener of the present invention will be specifically described with reference to the drawings. However, the embodiments described below are merely examples of the present invention and do not limitatively interpret the technical scope of the present invention. In each drawing, the same reference numerals are assigned to the same components, and the description thereof may be omitted. In this specification, based on the state in which the knife sharpener 1 is placed during use, the upper side and the lower side in the vertical direction are referred to as the upper side and the lower side, respectively, the lower surface is referred to as the bottom surface or the lower surface, and the upper surface is referred to as the upper surface.

[0025] <Configuration of the knife sharpener> As shown in FIGS. 1 and 2 and the like, the knife sharpener 1 includes a base 2 and a cover 3. The knife sharpener 1 forms a main body 4 when the base 2 and the cover 3 are connected, and includes a plurality of polishing bodies for polishing a knife inside thereof. As shown in FIG. 1, the main body 4 has a substantially rectangular parallelepiped shape with rounded corners, and a bottom surface recess 25 described later is formed on the bottom surface thereof. The knife sharpener 1 can polish a wave-edge kitchen knife having a wavy blade edge and a double-edge kitchen knife having a straight or curved blade edge. In other words, the main body 4 is a housing (case) of the knife sharpener 1.

[0026] <Base 2> The base 2 is a part of the main body 4 and constitutes the bottom of the knife sharpener 1. The base 2 supports the first polishing body 21, the second polishing body 22, and the third polishing body 23, which are components of the knife sharpener 1. That is, the first polishing body 21, the second polishing body 22, and the third polishing body 23 are arranged inside the main body 4 composed of the base 2 and the cover 3. The base 2 has two screw holes 24 that are through holes, respectively, and is connected to the cover 3 by screws 24a inserted through the screw holes 24. Threads may be formed inside the screw holes 24, but the screw holes 24 may be through holes without threads.

[0027] As shown in FIG. 1, FIG. 6, etc., the base 2 has, on its bottom surface, a bottom concave portion 25 formed so as to be recessed upward in the width direction at the central portion in the longitudinal direction. The bottom concave portion 25 has a seamless curved surface configuration. In other words, the bottom concave portion 25 is formed in a gently curved shape with rounded corners. FIG. 8 is a cross-sectional view of the knife sharpener 1 at the position A-A of FIG. 6. That is, FIG. 8 is a cross-sectional view of the knife sharpener 1 in a plane perpendicular to the longitudinal direction at the central portion in the longitudinal direction. As shown in FIG. 8, in a cross-section perpendicular to the longitudinal direction of the base 2, the central portion of the base 2 is convex downward in a U shape. The bottom concave portion 25 is formed symmetrically with respect to the center in the width direction of the base 2. The bottom concave portion 25 is formed so that when the main body 4 of the knife sharpener 1 is gripped by the user from above during use, the user's finger can be hooked, so that the user can stably grip the knife sharpener 1.

[0028] As shown in FIG. 3, the base 2 is rectangular in a plan view seen from above. The base 2 has a first abrasive body 21 on one side with respect to the central portion in the longitudinal direction of the knife sharpener 1, and a second abrasive body 22 and a third abrasive body 23 on the other side. These abrasive bodies are arranged in the order of the first abrasive body 21, the third abrasive body 23, and the second abrasive body 22 in sequence from one side of the knife sharpener 1.

[0029] As shown in FIGS. 5 and 7, a U-shaped hook 26 is provided on the bottom surface of the base 2. The hook 26 is rotatably connected to the bottom surface of the base 2 at two connecting portions 26a. By rotating the hook 26 about the connecting portion 26a as a rotation axis, the hook 26 shown in FIG. 5 in the stored state can be changed to the state where the hook 26 shown in FIG. 7 is deployed. In the state of FIG. 7 where the hook 26 is deployed, the hook 26 can be hung on a hook or the like provided on the kitchen wall surface for storage.

[0030] <The first abrasive body 21, the second abrasive body 22, the third abrasive body 23> As shown in FIGS. 2 and 3, the first grinding body 21 is disposed below the first slit 31. The first grinding body 21 is a grindstone for grinding a wave-edge knife, and consists of two plate-shaped grindstones, the first grindstone 21a. The first grindstone 21a is formed of, for example, cemented carbide. The end faces of the first grindstone 21a are each in contact with the cutting edge of the wave-edge knife, and the wave-edge knife can be ground. The bottom and side portions of the first grinding body 21 are supported so as to be clamped by the base 2.

[0031] As shown in FIGS. 2 and 3, the second grinding body 22 is disposed below the second slit 32. The second grinding body 22 is a grindstone for first grinding a double-edge knife, and consists of a second grindstone 22a having a shape in which two truncated cones are connected to each other by an upper surface having an area smaller than the bottom surface. The second grindstone 22a is formed of, for example, ceramic. The side surface of the second grindstone 22a is in contact with the cutting edge of the double-edge knife, and the double-edge knife can be ground. The second grinding body 22 has a central axis 22b passing through the center, and this central axis is supported by the base 2.

[0032] As shown in FIGS. 2 and 3, the third grinding body 23 is disposed below the third slit 33. The third grinding body 23 is a grindstone for performing finish grinding on the double-edge knife ground by the second grinding body 22, and is a grindstone having a finer grain size than the second grinding body 22. The third grinding body 23 consists of two columnar grindstones, the third grindstone 23a. The third grindstone 23a is formed of, for example, ceramic. The side surface of the third grindstone 23a is in contact with the cutting edge of the double-edge knife, and the double-edge knife can be ground. The side surface and the lower end of the third grindstone 23a are supported by the base 2.

[0033] <Cover 3> The cover 3 is a part of the main body 4 and constitutes the upper part of the knife sharpener 1. As shown in FIGS. 1 and 2 etc., on the upper surface of the cover 3, a first slit 31, a second slit 32, and a third slit 33 are formed. The first slit 31, the second slit 32, and the third slit 33 are each formed as a groove-shaped one extending in the width direction of the cover 3 downward from the upper surface of the cover 3. The first slit 31, the second slit 32, and the third slit 33 are each a groove formed linearly along the vertical direction. Below the first slit 31, the second slit 32, and the third slit 33, a first polishing body 21, a second polishing body 22, and a third polishing body 23 supported by the base 2 are respectively arranged. The first slit 31 is located on one side with respect to the central part in the longitudinal direction of the knife sharpener 1, and the second slit 32 and the third slit 33 are located on the other side. These slits are formed in the order of the first slit 31, the third slit 33, and the second slit 32 in sequence from one side of the knife sharpener 1. The first slit 31, the second slit 32, and the third slit 33 guide the cutting edge of the knife to be polished toward the first polishing body 21, the second polishing body 22, and the third polishing body 23 respectively.

[0034] On both side surfaces 3a of the cover 3, curved recesses 3b formed to curve upward along the bottom recess 25 are formed.

[0035] In the cover 3, two screw holes 34 into which a screw 24a inserted into the screw hole 24 of the base 2 is inserted are formed. The screw holes 34 are female screws with internal threads formed therein.

[0036] As shown in FIG. 6, icons 31a, 32a, and 33a are provided as guiding displays in use on the side surface 3a of the cover 3 so as to be adjacent to the first slit 31, the second slit 32, and the third slit 33, respectively. The icons 31a, 32a, and 33a display the type of the cutting tool to be polished by the adjacent first slit 31, second slit 32, and third slit 33, respectively, and a guide for the number of times to slide the cutting tool to be polished during polishing. The icons 31a to 33a are provided not only on one side surface 3a of the cover 3 shown in FIG. 6 but also on the side surface opposite to this side surface 3a. By providing the icons 31a to 33a on both side surfaces, it becomes easier to visually recognize the icons 31a to 33a regardless of the dominant hand of the user.

[0037] <Size of the knife sharpener 1> As shown in FIGS. 6 and 1, the longitudinal length L1 of the main body 4 of the knife sharpener 1 is 135 mm, the lateral length L2 is 36 mm, and the vertical length, that is, the height L3 is 40 mm. The longitudinal length L4 of the bottom surface recess 25 is 74 mm, and the vertical length, that is, the height L5 is 28 mm. The height L6 at the position where the height is lower in the center in the lateral direction of the bottom surface recess 25 is 13 mm.

[0038] With such dimensions, the grip performance is enhanced. When the user holds the main body 4, the user's fingers can sink into the bottom surface recess 25 to some extent, which makes it difficult for the main body 4 to fall over and makes it easier to apply force from the upper surface during use. In addition, since the bottom surface recess 25 has a curved shape, the user can firmly hold the main body 4 with a good feel.

[0039] <Use of the knife sharpener 1> As described above, the knife sharpener 1 can be used for sharpening wavy-edge knives and double-edge knives. When sharpening a wavy-edge knife, the user can recognize that the first slit 31 and the first abrasive member 21 are for sharpening the wavy-edge knife by looking at the icons 31a to 33a (especially the icon 31a). The user inserts the cutting edge of the wavy-edge knife to be sharpened through the first slit 31 and brings the cutting edge into contact with the first abrasive member 21 while being guided by the first slit 31. Then, by sliding the wavy-edge knife so as to pull it forward, the cutting edge of the wavy-edge knife is sharpened. The user can repeat this sharpening operation based on the number of times indicated by the guidance of the icon 31a. In this way, the wavy-edge knife can be sharpened using the knife sharpener 1.

[0040] On the other hand, when sharpening a double-edge knife, the user can recognize that the double-edge knife should be first sharpened with the second slit 32 and the second abrasive member 22, and then sharpened with the third slit 33 and the third abrasive member 23 by looking at the icons 31a to 33a (especially the icons 32a and 33a). First, the user inserts the cutting edge of the double-edge knife to be sharpened through the second slit 32 and brings the cutting edge into contact with the second abrasive member 22 while being guided by the second slit 32. Then, by sliding the double-edge knife so as to pull it forward, the cutting edge of the double-edge knife is sharpened. The user can repeat the sharpening operation by the second abrasive member 22 based on the number of times indicated by the guidance of the icon 32a. Further, the user inserts the cutting edge of the double-edge knife to be sharpened through the third slit 33 and similarly sharpens the cutting edge with the third abrasive member 23. The user can repeat the sharpening operation by the third abrasive member 23 based on the number of times indicated by the guidance of the icon 33a. In this way, the double-edge knife can be sharpened using the knife sharpener 1.

[0041] <Modification Example> The knife sharpener of the above embodiment can adopt the following modification examples. Note that the modification examples described below do not limit the interpretation of the present invention and are described as specific examples.

[0042] In the embodiment, the wavy-edge knife and the double-edge knife were used as the knives to be polished. However, for example, the wavy-edge knife and the single-edge knife may be used as the objects to be polished, or the double-edge knife and the single-edge knife may be used as the objects to be polished. In this case, an abrasive body suitable for the knife to be polished is adopted. However, it is preferable to adopt the configuration of the embodiment in which the double-edge knife and the wavy-edge knife, which are often used in ordinary households, are used as the objects to be polished.

[0043] The abrasive body used in the knife sharpener 1 of the embodiment is not limited to the first abrasive body 21, the second abrasive body 22, and the third abrasive body 23 described in the embodiment, and can be appropriately changed. Also, in the configuration of the embodiment, the first abrasive body 21 is used as one abrasive body for the wavy-edge knife, and the second abrasive body 22 and the third abrasive body 23 are used as two abrasive bodies for the double-edge knife. However, the configuration is not limited to this. That is, a configuration in which two or more abrasive bodies are used for the wavy-edge knife may be adopted, or a configuration in which one or three or more abrasive bodies are used for the double-edge knife may be adopted. However, it is preferable to adopt the configuration of the embodiment in which the abrasive bodies are arranged in a well-balanced manner.

[0044] In the knife sharpener 1 of the embodiment, a configuration in which the abrasive body is rotationally driven using a motor or the like is not adopted, but a configuration in which the abrasive body is rotationally driven by a motor or the like may be adopted. In this case, a configuration in which only one of the abrasive bodies is rotationally driven may be adopted, or a configuration in which all of the abrasive bodies are rotationally driven may be adopted.

[0045] <Features of the Embodiment> As described above, the knife sharpener of one embodiment illustrated with the embodiment and the modification has the following features.

[0046] The knife sharpener 1 includes a main body 4 including a base 2 and a cover 3, and a first polishing body 21 disposed in the main body 4 for polishing a first knife (for example, a wave-edge kitchen knife) which is a first type of knife. The main body 4 has a bottom concave portion 25 formed on the bottom surface so as to be recessed upward in the width direction at the central portion in the longitudinal direction. The cross section (see FIG. 8) perpendicular to the longitudinal direction at the central portion in the longitudinal direction of the main body 4 is U-shaped convex downward. On the upper surface of the main body 4, a first slit 31 is formed which is formed in a groove shape extending in the width direction and guides the cutting edge toward the first polishing body 21.

[0047] According to such a knife sharpener 1, by adopting a configuration provided with the bottom concave portion 25, the grip performance is enhanced, and the user can stably grip the knife sharpener 1 so as not to be displaced. Therefore, it is possible to suppress the knife sharpener 1 from moving in the direction of sliding the knife during use, and it can be used safely. At this time, in the case of a conventional configuration, a guard member for preventing the hand from slipping toward the slit side may be provided between the gripping portion gripped by the user and the slit into which the cutting edge is inserted. However, without providing such a guard member, a configuration that can be used sufficiently safely is achieved. In the knife sharpener 1, since such a guard member is unnecessary, the size in the height direction can be reduced, and it becomes easy to store compactly. Further, since the force applied by the user to the knife is effectively applied to the cutting edge, the knife to be polished can be polished with a relatively small force.

[0048] In addition, in the above-mentioned knife sharpener 1, it is preferable that a member protruding upward is not provided on the upper surface of the main body 4 (the upper surface of the cover 3).

[0049] In addition, in the knife sharpener 1, a second polishing body 22 for polishing a second knife (for example, a double-edged kitchen knife) of a type different from the first knife (for example, a wavy-edge kitchen knife) is disposed inside the main body 4. On the upper surface of the main body 4, a second slit 32 is further formed which is formed in a groove shape extending in the width direction and guides the cutting edge toward the second polishing body 22. The first slit 31 and the first polishing body 21 are disposed on one side in the longitudinal direction of the main body 4 with respect to the central portion in the longitudinal direction of the main body 4, and the second slit 32 and the second polishing body 22 are disposed on the other side in the longitudinal direction of the main body 4 with respect to the central portion.

[0050] According to such a knife sharpener 1, since the first slit 31 and the first polishing body 21 and the second slit 32 and the second polishing body 22 are arranged in a well-balanced manner on one side and the other side with respect to the central portion, different types of knives can be polished by the respective polishing bodies, and a compact configuration can be achieved. In addition, since the center of gravity can be positioned in the vicinity of the central portion, it is less likely to be displaced, and a configuration that is stable during use can be achieved.

[0051] Further, the knife sharpener 1 is configured to polish a wavy-edge kitchen knife having a wavy cutting edge as the first knife and a knife having a straight or curved cutting edge (for example, a double-edged kitchen knife) as the second knife.

[0052] When polishing a knife with a wavy cutting edge, the knife sharpener is particularly likely to be displaced, but in the above-described knife sharpener 1, its position can be stabilized during use. In recent years, high-class bread has become more widely distributed than before, and accordingly, the frequency of using a wavy-edge kitchen knife with a wavy cutting edge has increased. However, a knife sharpener capable of polishing both such a wavy-edge kitchen knife and a knife with a straight or curved cutting edge can be provided.

[0053] Further, in the knife sharpener 1, a third grinding body 23 for grinding a second knife (for example, a double-edged kitchen knife) is further disposed in the main body 4. On the upper surface of the main body 4, a third slit 33 is further formed which is formed in a groove shape extending in the width direction and guides the cutting edge toward the third grinding body 23. The third slit 33 and the third grinding body 23 are disposed on the other side in the longitudinal direction of the main body 4 with respect to the central portion in the longitudinal direction of the main body 4.

[0054] According to such a knife sharpener 1, since the second grinding body 22 and the third grinding body 23 are provided as grinding bodies for grinding a second knife (for example, a double-edged kitchen knife) with a linear or curved cutting edge, a configuration can be achieved in which the second knife with a higher usage frequency can be effectively ground. Further, since the second slit 32, the second grinding body 22, the third slit 33, and the third grinding body 23 for grinding the second knife are arranged adjacent to the other side of the central portion, a configuration is obtained in which the second knife can be easily ground.

[0055] Further, since the main body 4 of the knife sharpener 1 is substantially a rectangular parallelepiped, a more compact configuration can be achieved, and it can be easily accommodated, such as in a kitchen drawer.

[0056] Also, in the knife sharpener 1, the bottom surface recess 25 is formed symmetrically with respect to the center in the width direction of the main body 4. Since the knife sharpener 1 is configured such that the first grinding body 21 is disposed on one side and the second grinding body 22 and the third grinding body 23 are disposed on the other side with respect to the central portion in the longitudinal direction, the user may hold one side and use the second grinding body 22 and the third grinding body 23, or hold the other side and use the first grinding body 21. In this case, as described above, by forming the bottom surface recess 25 symmetrically with respect to the center in the width direction of the main body 4, it becomes easy to grip the main body 4 by hooking a finger on the bottom surface recess 25 in either case. Also, a configuration is obtained in which the main body 4 can be easily gripped regardless of the dominant hand.

[0057] As shown in the embodiment, the knife sharpener 1 can be configured to include a main body 4, a first polishing body 21 disposed within the main body 4 for polishing a first knife having a wavy cutting edge, a second polishing body 22 for polishing a second knife having a straight or curved cutting edge, and a third polishing body 23 for polishing the second knife. Here, the third polishing body 23 has a finer particle size than the second polishing body 22. The main body 4 has a bottom surface recess 25 formed on the bottom surface so as to be recessed upward in the width direction at the central portion in the longitudinal direction of the main body 4. The cross-section (see FIG. 8) perpendicular to the longitudinal direction at the central portion in the longitudinal direction of the main body 4 is U-shaped convex downward. The upper surface of the main body 4 has a first slit 31, a second slit 32, and a third slit 33. The first slit 31 is formed in a groove shape extending in the width direction and guides the cutting edge toward the first polishing body 21. The second slit 32 is formed in a groove shape extending in the width direction and guides the cutting edge toward the second polishing body 22. The third slit 33 is formed in a groove shape extending in the width direction and guides the cutting edge toward the third polishing body 23. The first slit 31 and the first polishing body 21 are disposed on one side in the longitudinal direction of the main body 4 with respect to the central portion in the longitudinal direction of the main body 4, and the second slit 32, the second polishing body 22, the third slit 33, and the third polishing body 23 are disposed on the other side in the longitudinal direction of the main body 4 with respect to the central portion.

[0058] Also, in the above, the first polishing body 21 may be composed of two plate-shaped first grindstones 21a, the second polishing body 22 may be composed of a second grindstone 22a having a shape in which two truncated cones are connected to each other at an upper surface having an area smaller than the bottom surface, and the third polishing body 23 may be composed of two columnar third grindstones 23a.

[0059] The kitchen knife sharpener 1 can be made compact by having the above-described configuration and size, and can be stored in a convenient place such as a kitchen drawer. Therefore, the kitchen knife can be easily sharpened again, and thus a kitchen knife with always good sharpness can be used. Also, it can be stored in the kitchen drawer, making the kitchen tidy. Moreover, although the kitchen knife sharpener 1 is compact, it can be firmly held and stably used to sharpen a kitchen knife or the like. Further, the kitchen knife sharpener 1 can sharpen a plurality of types of cutting tools while having a compact configuration.

Explanation of Signs

[0060] 1... Cutting tool sharpener 2... Base 21... First grinding body 22... Second grinding body 23... Third grinding body 24... Screw hole 24a... Screw 25... Bottom concave portion 26... Hook 3... Cover 31... First slit 32... Second slit 33... Third slit 31a~33a... Icons 34... Screw hole 4... Main body

Claims

1. A body, and a polishing member disposed within the body, comprising a knife sharpener, wherein the body has a bottom surface recess formed in a central portion in the longitudinal direction so as to be recessed upward in the width direction, wherein a cross-section perpendicular to the longitudinal direction in the central portion in the longitudinal direction of the body is U-shaped convex downward, wherein a slit is formed in a groove shape extending in the width direction on the upper surface of the body to guide the cutting edge toward the polishing member, A knife sharpener.

2. The polishing member is a first polishing member for polishing a first knife, wherein the slit is a first slit, wherein a second polishing member for polishing a second knife of a type different from the first knife is further disposed within the body, wherein a second slit is further formed in a groove shape extending in the width direction on the upper surface of the body to guide the cutting edge toward the second polishing member, wherein the first slit and the first polishing member are disposed on one side in the longitudinal direction of the body with respect to the central portion, and the second slit and the second polishing member are disposed on the other side in the longitudinal direction of the body with respect to the central portion, The knife sharpener according to claim 1.

3. The first knife has a wavy cutting edge, and the second knife has a straight or curved cutting edge, The knife sharpener according to claim 2.

4. A third polishing member for polishing the second knife is further disposed within the body, wherein a third slit is further formed in a groove shape extending in the width direction on the upper surface of the body to guide the cutting edge toward the third polishing member, wherein the third slit and the third polishing member are disposed on the other side in the longitudinal direction of the body with respect to the central portion, The knife sharpener according to claim 2.

5. The body is substantially a rectangular parallelepiped, The knife sharpener according to claim 2.

6. The bottom surface recess is formed symmetrically with respect to the center in the width direction of the body, The knife sharpener according to claim 2.

7. A body, and a polishing member disposed within the body, comprising a knife sharpener, wherein the body has a bottom surface recess formed in a central portion in the longitudinal direction so as to be recessed upward in the width direction, wherein a cross-section perpendicular to the longitudinal direction in the central portion in the longitudinal direction of the body is U-shaped convex downward, On the upper surface of the main body, a slit is formed in a groove shape extending in the width direction, guiding the cutting edge toward the polishing body. On the upper surface of the main body, there is no member protruding upward. Knife sharpener.

8. A main body, A knife sharpener comprising a first polishing body disposed in the main body for polishing a first knife having a wavy cutting edge, a second polishing body for polishing a second knife having a straight or curved cutting edge, and a third polishing body for polishing the second knife, The third polishing body has a finer particle size than the second polishing body. The main body has, on the bottom surface, a bottom concave portion formed to be recessed toward the upper surface in the width direction at the central portion in the longitudinal direction of the main body. The bottom concave portion is formed symmetrically with respect to the center in the width direction of the main body. The cross section perpendicular to the longitudinal direction at the central portion in the longitudinal direction of the main body is in a U shape convex downward. On the upper surface of the main body, A first slit formed in a groove shape extending in the width direction, guiding the cutting edge toward the first polishing body; A second slit formed in a groove shape extending in the width direction, guiding the cutting edge toward the second polishing body; A third slit formed in a groove shape extending in the width direction, guiding the cutting edge toward the third polishing body, are formed. The first slit and the first polishing body are disposed on one side in the longitudinal direction of the main body with respect to the central portion, and the second slit, the second polishing body, the third slit, and the third polishing body are disposed on the other side in the longitudinal direction of the main body with respect to the central portion. Knife sharpener.

9. The first polishing body is composed of two plate-shaped grindstones. The second polishing body is composed of a grindstone in a shape where two truncated cones are connected to each other on the upper surface having an area smaller than the bottom surface. The third polishing body is composed of two columnar grindstones. The knife sharpener according to claim 8.

Images