Knife sharpening device

The kitchen knife sharpening tool with a 30° angle and magnetic alignment facilitates easy and efficient sharpening, addressing inefficiencies in existing methods by ensuring precise blade alignment and quick sharpening results.

JP2025110347APending Publication Date: 2025-07-28樽井 勇介
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Patent Information

Application Number
JP2024013662
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-15
Publication Date
2025-07-28

AI Technical Summary

Technical Problem

Existing methods for sharpening kitchen knives using sharpeners or grindstones are inefficient, time-consuming, and difficult to maintain the optimal blade angle, especially for double-edged knives.

Method used

A kitchen knife sharpening tool with a 30° inclined surface, a neodymium magnet, a weight, and a grindstone contact plate, allowing for easy and quick sharpening by maintaining the blade at a 30° angle during the process.

Benefits of technology

The tool enables quick and effective sharpening, reducing shaving and enabling users of various skill levels to achieve high sharpness with reduced effort.

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Abstract

To solve a problem that knife sharpening using a conventional sharpener or grind stone has low effect and a high degree of difficulty.SOLUTION: The present invention enables maintenance of a knife using a grind stone to be performed easily in a short time, by sharpening the knife while maintaining a higher angle (30°) than a conventional angle (15°).SELECTED DRAWING: Figure 1
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Description

Technical Field

[0001] The present invention relates to an instrument for facilitating the sharpening of a kitchen knife with a grindstone.

Background Art

[0002] In order to maintain the sharpness of a kitchen knife, existing methods involve polishing using a sharpener or a grindstone. However, each has its own points to be solved. A sharpener (rod-shaped or mechanical) applies an abrasive to the blade tip to create a cutting edge that can cut through the part caught on the food, but the blade tip gradually becomes round and the effect gradually weakens. Polishing with a general grindstone produces a high sharpness but takes time to finish sharpening, and multiple types of grindstones are also required. Also, in the case of a double-edged kitchen knife, the angle of the blade needs to be maintained at about 15°, and the difficulty of the operation itself is high.

Prior Art Documents

[0003]

Patent Documents

Patent Documents

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to enable easy and quick sharpening of a kitchen knife using a grindstone and to allow the user to maintain the sharpness.

Means for Solving the Problems

[0005] A lower surface facing the grindstone disposed below, An inclined surface adjacent to the lower surface and inclined at 30° with respect to the upper surface of the grindstone in a direction away from the grindstone as it moves away from the lower surface, A neodymium magnet built into the inclined surface, A plate covering the neodymium magnet, A contact plate disposed on the lower surface and contacting the grindstone; A weight disposed above the lower surface; Handle portions disposed on both sides of the weight, and a kitchen knife sharpening tool having the same.

Advantages of the Invention

[0006] By increasing the angle (from a general angle of 15° to 30°), the amount of shaving is reduced, and a high sharpness can be achieved in a short time while using the grindstone. Also, since the angle can be fixed, even a clumsy person or a child of elementary school age can easily use it.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0008] Referring to FIG. 1, a kitchen knife sharpening tool according to an embodiment of the present application will be described. The kitchen knife sharpening tool has a lower surface facing a grindstone disposed below the kitchen knife sharpening tool, and an inclined surface adjacent to the lower surface and inclined in a direction (upward direction) away from the grindstone as it moves away from the lower surface. The upper surface is rectangular. The side surface on the opposite side of the inclined surface across the lower surface is also rectangular. The side surface (lateral surface) sandwiched between the side surface and the inclined surface has a trapezoidal shape with an upper base longer than the lower base. The main body is preferably formed of wood.

[0009] The inclined surface has an inclination of 30° with respect to the upper surface of the grindstone. A neodymium magnet 2 is built into the inclined surface. An iron weight 3 is built into the upper side of the lower surface. A stainless steel grindstone contact plate 4 that makes surface contact with the upper surface of the grindstone is provided on the lower surface. The neodymium magnet 2 is covered with a plate 5 for hiding the magnet. Handle portions 6 recessed about 1 mm deep are formed in portions (both sides of the weight 3) of the trapezoidal side surface opposite to the inclined surface.

[0010] Next, with reference to FIG. 2, a method of using the kitchen knife sharpening tool according to an embodiment of the present application will be described. First, soak the ceramic grinding stone (grit #1000) with water. Place the kitchen knife with the cutting edge of the knife touching the grinding stone, and fix the blade at an angle of 30° from the grinding stone by the force of the neodymium magnet 2 in the inclined portion. With the cutting edge in contact with the grinding stone, repeat the operation of pushing forward the handle portion 6 so that the front portion of the kitchen knife sharpening tool does not float about three times. Grind the entire surface of the blade while shifting the position sequentially (the back surface is not ground). When applying the cutting edge at the tip of the curved kitchen knife, lift the portion of the blade near the handle of the kitchen knife away from the grinding stone, and the tip will hit the grinding stone. While moving the sharpened cutting edge of the kitchen knife toward the back, apply it to the bundled newspaper or strop it against the strop. If the sharpness is not achieved, it is because the cutting edge has originally worn down too much and the ground portion has not reached the cutting edge. Repeat the same operation again until the cutting edge becomes sharp and has a high sharpness. By making the entire cutting edge sharp, a kitchen knife with high sharpness can be obtained.

Description of Reference Numerals

[0011] 1 Inclination 2 Neodymium magnet 3 Weight 4 Grinding stone contact plate 5 Plate for hiding the magnet 6 Handle portion

Claims

【Claim 1】 A lower surface facing the grindstone, An inclined surface adjacent to the lower surface and inclined 30° with respect to the upper surface of the grindstone in a direction away from the grindstone as it moves away from the lower surface, A neodymium magnet built into the inclined surface, A plate covering the neodymium magnet, A contact plate disposed on the lower surface and contacting the grindstone, A weight disposed above the lower surface, And handle portions disposed on both sides of the weight, a kitchen knife sharpening tool having the same.

Citation Information

Patent Citations

  • Knife sharpening aid

    JP3223022U