JPH038220Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a paper cutter that has a new configuration, has excellent cutting performance and safety, and has an innovative design.

[Problems that conventional technology and ideas try to solve]

Various paper cutters have been used for a long time, but in general, the sharpness and safety of the cutter are in a contradictory relationship, so if the edge of the paper cutter is made sharp, it may cause accidental injury to the tip of a finger while using it. This caused a safety problem.

In addition, the blade material of paper cutters for cutting paper is commonly made of steel materials such as carbon steel and stainless steel.Although the carbon steel blade material has good sharpness during cutting, it has a long lifespan. It has the disadvantage that the cutting edge becomes uncut due to wear and chemical corrosion due to prolonged use. Further, in the case of stainless steel blade material, although it is difficult to corrode, there is a problem that it cannot be resharpened when the blade edge becomes worn.

The present invention was developed in view of the above problems, and the blade body does not undergo chemical changes such as corrosion, and its sharpness does not deteriorate over many years.It is also highly safe. The purpose is to provide a paper cutter with an innovative design.

[Means for solving problems]

In other words, the paper cutter according to the present invention has a blade having a purity of 99% or more and a Mohs hardness of 8 or more.
An Al ₂ O ₃ single crystal plate is used, and one edge of the blade has a pure square blunt point, and the blade is insert molded near one corner of the main body made of synthetic resin plates of various flat shapes. Alternatively, the blade is inserted and fixed, and the obtuse cutting edge slightly protrudes from one edge of the main body during insert molding or insertion and fixation. Further, the main body is constructed such that a transparent window of a desired shape is provided on the surface where the blade insert is located, and the blade is exposed through the transparent window.

α with purity of 99% or more and Mohs hardness of 8 or more as described above
-The Al ₂ O ₃ single crystal is a substance having high hardness and high elastic modulus, such as ruby or sapphire, and is a natural or synthetic substance.

When artificially synthesizing this substance, for example, a predetermined trace amount is added to Al ₂ O ₃ rough stone with a purity of 99% or more.
There is a method in which Cr ₂ O ₃ or TiO ₂ and Fe ₂ O ₃ are mixed and single crystallized by horizontal melt zone movement using a seed crystal.

The α-Al ₂ O ₃ single-crystal wafer obtained by the above method is sliced into thin plates, and several layers are adhered to a predetermined thickness to form a blade.

There are abrasive methods and chemical methods for shaping the cutting edge, and both can be used in combination. The polishing method uses a particle size of 1μm.
Polishing and cutting is performed using the following diamond abrasive grains. In the chemical method, Al ₂ O ₃ is etched using chemicals, such as HCl,
In addition to inorganic acids such as HF and H ₂ SO ₄ and inorganic bases such as NaOH and KOH, organic bases such as alkali metal alkoxides and fluxing agents such as KHF ₂ and Na ₃ AlF ₆ can be used.

The final cutting edge can also be formed using an ion beam. The ions used are inert gas ions such as argon, and are irradiated with ion energy exceeding 5 KeV to grind the cutting edge.

[Effect]

The paper cutter according to the present invention places the paper to be cut on a relatively hard board, such as a plastic board, and cuts the paper under pressure between the cutter and the cutting edge. Therefore, the cutting edge of the blade protruding from the main body is extremely small and has an obtuse angle, so relatively hard materials such as paper can be cut depending on the difference in hardness of the material, but human skin When it comes into contact with something like this, the soft nature of the skin causes the blade tip to recede, preventing injury from being cut.

Therefore, the sharpness does not deteriorate over a long period of time, and it is highly safe.

Furthermore, in the configuration of the present invention, the blade body is exposed through the transparent window, so the transparent red color of ruby or the transparent blue color of sapphire appears in the shape of the transparent window, creating a novel design. exhibits.

〔Example〕

An embodiment of the paper cutter according to the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a main body in the shape of a parallelogram flat plate molded from synthetic resin, and design holes 2 and 3 are formed in the main body 1 as necessary. Reference numeral 4 denotes a blade body that is insert-molded and integrated into the wall thickness near one corner of the main body 1, and the blade body 4 is made from an α-Al ₂ O ₃ single crystal plate with a purity of 99% or more and a Mohs hardness of 8 or more. An obtuse-angled cutting edge 5 is formed at one end of the edge of the blade body 4, and the obtuse-angled cutting edge 5 protrudes slightly (0.5 to 1.0 mm) from one edge of the main body 1. Further, a transparent window 6 having an appropriate shape such as a heart shape or a diamond shape is provided on one side of the main body at the insert position of the blade body 4, and the insert portion of the blade body 4 is exposed through the transparent window 6. It becomes like this.

According to the above configuration, the cutting edge 5 is formed at an obtuse angle and is provided in a slightly protruding state from the edge of the main body 1, so that even if the cutting edge 5 is exposed, it will not injure the skin or the like. In addition, when cutting paper, etc., the paper is compressed and cut between relatively hard floor plates such as plastic plates due to the hardness difference due to the high hardness of the blade 4, so the blade edge 5 is obtuse-angled. It also exhibits excellent sharpness and maintains its sharpness for a long period of time because it hardly causes any wear. Furthermore, the blade body 4 exposed through the transparent window 6,
The transparent color of the beautiful shape is formed by the transmitted light of the blade body 4, and it has an innovative design.Since the blade body 4 does not undergo deterioration such as oxidation, it can be used for many years. Initial transparency can be maintained.

In this embodiment, the blade body 4 is integrated into the main body 1 by insert molding, but an insertion hole for inserting the blade body 4 into the main body 1 is pre-drilled. It is also possible to integrate them by means such as adhesion. Further, in this embodiment, the shape of the main body 1 and the shape of the transparent window 6 are specified and illustrated, but it goes without saying that these shapes can be designed arbitrarily.

[Effect of idea]

As mentioned above, the paper cutter according to the present invention has an extremely hard blade that does not undergo chemical changes such as corrosion, so it retains its sharpness for many years and is highly safe. be.
In addition, the blade shines when exposed to transmitted light, and the transparent window portion forms a light shape, resulting in an innovative design, and the practical effects of this invention after implementation are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a front view of a paper cutter according to the present invention, FIG. 2 is an enlarged view of the main parts, and FIG. 3 is a sectional view taken along the line -- in FIG. 2. 1...Main body, 4...Blade body, 5...Blade tip, 6...
Transparent window.

Claims (1)

[Scope of utility model registration request] Near one corner of the main body made of synthetic resin plates of various flat shapes, a blade made of an α-Al ₂ O ₃ single crystal plate with a purity of 99% or more and a Mohs hardness of 8 or more is inserted or molded into the wall thickness of the main body. At the same time, an obtuse cutting edge formed at one end of the edge of the blade body is slightly protruded from one edge of the body, and a transparent window of a desired shape is opened on the body surface at the blade insert position, and the transparent window is A paper cutter characterized by being constructed so that the blade body can be seen through it.