JP2004202162A - Handy box-shaped cutter knife - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that the conventional handy cutter knife to be used for cutting paper or the like is instable and highly dangerous, there is danger that a hand pressing the object to be cut is injured, a blade is easily broken to stick something, not only the hand easily get tired but also the thick object to be cut is cut with an oblique cut section, longitudinal cutting can not be performed continuously after transverse cutting, further, cutting of a curve is difficult, and cloth can not be cut. <P>SOLUTION: In the cutter knife, a main body is box-shaped and the blade is internally provided. Besides, the cutter knife is integrally structured to protrude the blade inside the box from a hole on the base, and the object to be cut is cut inside the box while tightly contacting the base to the object and sliding the base as it is, thereby making possible safe and stable cutting. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hand-held cutter knife used for cutting paper, cloth, and the like. It is safer, more usable, and more portable than conventional cutter knives.
[0002]
[Prior art]
As shown in FIG. 7, the structure and shape of a conventional hand-held cutter knife used for cutting paper or the like is such that the blade 2 slides in parallel from the inside of the main body 1 of the cutter knife, and only the blade portion is applied to the cut object. It is provided for use.
[0003]
[Problems to be solved by the invention]
However, according to the above prior art, the position of the hand is in the air, the angle of the blade is changed, and it is unstable and inaccurate. Hands get tired. The cut must be held with the other hand. You may accidentally cut your hand because the blade is bare. Once cut finely in the horizontal direction, the cut part floats in the air and cannot be cut in the vertical direction. It is difficult to cut soft objects such as cloth.
Therefore, in order to eliminate these factors, the present invention rethinks the hand-held cutter knife from the ground up, changing its structure, shape, and method of use. It is an object to provide for cutting paper, cloth, and the like.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1 has a main body in a box shape and a blade provided inside. A hand-held cutter knife that has an integrated structure in which the blade inside the box protrudes from the hole on the bottom, makes the bottom adhere to the cut object, slides it as it is, and cuts inside the box safely and stably It is.
According to the invention of claim 2, the main body is box-shaped and a blade is provided inside. The blade inside the box has an integral structure protruding from the hole on the bottom.
A A screw is provided to fix the blade as its shape.
B. A spring is provided to control the blade as its shape.
C. A slider for pushing down the blade is provided as its shape.
A hand-held cutter knife characterized in that the above-mentioned shape is formed into an integral structure, whereby the bottom surface is brought into close contact with the cut object, and is slid as it is to cut inside the box so that it can be cut safely and stably.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention is shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
The main body 1 of the cutter knife is composed of a box part 1a and a lid part 1b. 1a is a box-shaped transparent plastic, and the bottom surface, which is a contact point, is a smooth and horizontal plane, and the front and rear ends and the outer peripheral angle in the sliding direction are rounded so that even pressure is applied to the cut object. is there. A vertically long hole through which the blade 2 passes is provided in the left and right central portion. This hole serves as a guide for stably sending out the blade 2 by giving the bottom a thickness. Also, two holes are provided on the side surface symmetrically so that the screws 3a and 3b pass therethrough. By making the side surfaces have a thickness, the holes become connection portions that stably support the screws 3a and 3b when a force is applied thereto. Reference numeral 1 denotes a portion serving as a lid of the main body, which is made of transparent plastic, fits in 1 a, and has a hole in the front upper portion through which the slider 5 passes. The hole serves as a guide for stably sliding the slider 5 by giving a thickness to the peripheral portion. The blade 2 is attached to the inside of the main body 1 by screwing.
The blade 2 has a trapezoidal shape, and its longer bottom is a blade. By being made symmetrical, it can be replaced and used. The blade 2 has two holes, one of which serves as a fulcrum, is inserted between the screws 3a and the screw 3b, and is vertically connected to the main body 1a. The other hole is provided with a spring 4 and is connected to the main body 1a through a screw 3a.
The screw 3 is composed of two shapes 3a and 3b, and is screwed so as to sandwich the blade 2 therebetween, and is connected to one side through a spring 4. The blade 2 rotates around a screw hole as a fulcrum, and the rotation can be controlled by a spring 4 attached to the other hole.
The spring 4 has a hook shape at one side, and is fixed through the blade 2 so as not to come off.
Further, the slider 5 passes through a hole formed in the front upper portion of the transparent main body lid 1b, and the lower end thereof comes into contact with the blade 2 to serve as a power point for moving the blade 2 up and down.
As a result, the slider 5 is normally pushed up by the spring 4, and when the slider 2 is pressed down, the blade 2 rotates around the screws 3a and 3b as a fulcrum, comes into contact with the cut object, and the cut portion is the operating point. It becomes. The movable range of the slider 5 is such that the claw on the slider 5 serves as a stopper at the upper end thereof to prevent the slider 5 from jumping out further. At the lower end, the hook portion of the spring 4 passed through the hole of the blade 2 hits the bottom of the main body 1a to prevent the blade 2 from jumping out further, and the slider 5 also stops. That is, by changing the position of the hole of the blade 2, the movable range of the slider 5 and the movable range of the blade 2 can be adjusted.
Next, it is verified whether sufficient strength can be obtained from a mechanical point of view as a structure.
[0006]
[Object 1] M = F × l (moment of force)
FIG. 6 shows the physics rules for verifying the structure of the embodiment of the present invention.
The force applied to the force point at which the blade 2 is pressed down by the finger holding slider 5 is F1, the force applied to the fulcrum, which is the center of the hole where the blade 2 is connected to the screw 3 and rotated, is F2, the distance therebetween is 11, and the blade 2 is cut. The force applied to the cutting point in contact with the object is F3, and the distance between F1 and F3 is l2. Here, since it is desired to know only the relationship between l1 and l2, description will be made without using l3 marked in FIG.
According to the above rule, the moment of force is obtained by multiplying the length of the force by the length of the force, and when the blade 2 captures the cut object, F1, F2, and F3 are in a balanced state,
F1 × 12 = F2 (11 + 12)
F1 × 11 = F3 (11 + 12)
Therefore, the force applied to F2 is F1 × l2 ÷ (l1 + l2)
The force applied to F3 is F1 × 11 ÷ (11 + 12)
It becomes. Therefore, since the magnitude of the force of F1 is the same in both cases, by increasing the distance of l1 and shortening the distance of l2, the force F2 applied to the fulcrum connected to the main body is relieved, and the point of action for cutting the cut object is obtained. Such a force F3 can be increased.
By setting the slider 5 closer to the action point side of the blade 2 as described above, most of the cutting force is transmitted to the cut object, and only a small amount of force is applied to the connection portion of the blade 2 with the main body. You can do so. Further, it can be seen that the slider 5 and the screw 3 are made of thick metal, and that the main bodies 1a and 1b can obtain sufficient strength by molding a simple box shape made of plastic.
In addition, if the bottom surface of the body is made smooth and the coefficient of friction is reduced, if the material of the underlying material on the opposite side of the cut object has a higher friction coefficient, the cut object will not stick even if it is slid under any pressure.
In addition, when the blade is applied, if the angle at which the blade hits is made as small as possible, the pressure acts more strongly in the vertical direction than in the horizontal direction, and it becomes slippery.
When a lateral force is applied to the main body, the supporting force of the blade becomes a problem. However, by increasing the thickness of the bottom surface of the main body 1 and narrowing the gap between the holes through which the blade 2 passes, The area in which the side wall of the hole at the bottom serving as a guide is in contact with the blade 2 is widened, so that it is possible to provide strong support in the lateral direction and to prevent the blade 2 from tilting.
[0007]
"Effects of the embodiment"
According to this embodiment, the cutter knife can be made compact with a minimum component configuration. Furthermore, by cutting it into a box shape and placing it on a cut object, the result is stable, and by fixing the blade, the result can be cut accurately. As a result of the blade standing upright from the bottom, it can always be cut vertically and curves can be cut easily. As a result of flattening the bottom surface and making close contact with the cut object, it is possible to cut while holding the periphery of the cut part, so that soft materials such as cloth can be cut, and even after cutting in the horizontal direction, continue cutting in the vertical direction It can be cut without holding it with the other hand. As a result of attaching the spring to the blade, when the hand is released, the blade is stored inside the main body, and it is safe to leave or carry it. As a result of attaching the slider to the upper part and interlocking with the blade, cutting can be performed with one touch, and there is no hassle of adjusting the insertion and removal of the blade. As a result of making the main body transparent so that the blade can be seen, it is possible to cut while directly looking at the cut portion.
As described above, a cut object such as paper or cloth can be cut easily, safely, accurately and stably with one touch. Therefore, the cut object is easily cut.
[0008]
"Other embodiments"
As described in claim 1, the basic concept of the present invention is completed by cutting a box or a square solid obliquely with a blade, inserting the blade, and taking out a tip portion of the blade. Item 2 is based on the results of continuous research on how to improve the safety, use value, and contribute to cultural life as a better product.
Therefore, other results in consideration of safety and use value are shown below.
In the embodiment of FIG. 1, the main body 1 a has a closed and closed shape except for the holes provided on the bottom surface. There may be parts and holes. Also, in the figure, in order to emphasize the visibility, a hole in the bottom of the main body 1a is extended to the outside of the front box and opened so that the blade can be visually recognized directly. Considering use, because of its safety, the hole on the bottom of the main body 1a is closed inside the box, and the blade 2, screw 3, spring 4, and slider 5 are respectively set back to further enhance safety. You can also. In addition, although it is made of transparent plastic, if it does not significantly affect the visibility of the blade, in other embodiments, the material may be changed, or it may be made translucent to emphasize design, You can also add color. It is also possible to provide a scale to enhance the practicality.
In addition, in order to prevent the blade 2 from being easily taken out because of its safety in consideration of use by a child, in another embodiment, the screw 3 is not a screw if it can be fixed to the main body with the blade 2 interposed therebetween. For example, a pipe or a rod may be crimped.
The spring 4 is fixed through the screw 3. However, in other embodiments, the spring 4 may be fixed to the main body 1 without passing the screw 3, or the spring 4 may be a leaf spring instead of a coil spring. .
In addition, although the slider 5 is made of metal, the material may be changed in other embodiments as long as the strength can be maintained.
[0009]
【The invention's effect】
As described above, according to the present invention, a cut object such as paper or cloth can be cut easily, safely, accurately and stably with one touch. Furthermore, it can be easily cut vertically. You can easily cut curves. After cutting in the horizontal direction, it can be cut in the vertical direction. You can cut without holding with the other hand.
[0010]
Also, since the cutting is performed inside the main body, the blade does not come out during cutting. Does not fly even if the blade breaks. Because it is a compact design, it easily fits in your pocket. Your hands don't float in the air, so you won't get tired for a long time. A straight line cut by applying a ruler becomes easy and accurate. The cut object does not move after cutting. Refills and maintenance of blades can be performed. Production cost is low. High design. High rigidity.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a plan view showing an embodiment of the present invention.
FIG. 3 is a side cross-sectional view showing one embodiment of the present invention, showing a state during use and a state after use.
FIG. 4 is a side cross-sectional view showing one embodiment of the present invention, showing a state during use and a state after use.
FIG. 5 is a component diagram showing one embodiment of the present invention.
FIG. 6 is a diagram showing a physics law for verifying an embodiment of the present invention, in which the law, an explanatory note, and a mathematical expression are inserted for easy understanding.
FIG. 7 is a perspective view showing a conventional technique.
[Explanation of symbols]
1 body 1 a body box 1 b body lid 2 blades 3 screws 3 screws with convex threads out of 3 screws with concave threads 4 spring 5 slider F1 force applied to fulcrum F2 fulcrum Such force F3 Force applied to the point of action 11 Force point, distance between fulcrum points 12 Force point, distance between action points 13 Distance between fulcrum and action point

Claims (2)

The body is box-shaped and a blade is provided inside. A hand-held cutter knife that has an integrated structure in which the blade inside the box protrudes from the hole on the bottom, makes the bottom adhere to the cut object, slides it as it is, and cuts inside the box safely and stably . The main body is box-shaped and a blade is provided inside. The blade inside the box has an integral structure protruding from the hole on the bottom.
A A screw is provided to fix the blade as its shape.
B. A spring is provided to control the blade as its shape.
C. A slider for pushing down the blade is provided as its shape.
2. The hand-held cutter knife according to claim 1, wherein the bottom is brought into close contact with the cut object by making the above-mentioned shape into an integral structure, and the cut can be performed safely and stably by cutting as it slides inside the box. .

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