JP2006000604A - Nail clipper with cutting edge of three-dimensional curve shape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nail clipper eliminating pain in cutting nails and the danger of a nail break and a cut to the quick and trimming the nails to the nail tips most conformed to the shape of the nails or conformed to a user's intention although the fingertip is painful when the curved nail is pressed flat and cut at a time if a conventional exclusive nail clipper is used to cut the nails, and the nails hardened with aging sometimes break when pressed flat and cut, and in the case of using scissors, it is hard to turn the scissors along the curve of the nail tip and hard to recognize a boundary line between the finger and the nail, and if trying to trim the nails as short as possible, there is a possibility of cutting the nail to the quick, and further in the case of cutting the other's nails, it is dangerous not to notice the pain. <P>SOLUTION: In this nail clipper with a cutting edge of three-dimensional curve shape, a vertical pair of cutting edges adjusted and polished to form the three-dimensional curve shape are formed as a turnable scissors mechanism or shearing mechanism to shear the nails. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a nail clipper that cuts and aligns human hands and toenails.

As for the instrument that cuts out the human hand and toenails, use an instrument such as a nail clipper or scissors.
Among these techniques, the following documents are known.
Japanese Patent Application Laid-Open No. 9-56447 “Tail clipping with scattering prevention”, JP 2002-112831 "Nipper type nail clippers with a cover that does not allow nails to fly", JP 2003-290571 “Scissors”, JP-A-10-33849 “−３”, “New Information Catalog” published by Japan Cultural Center, June 2004 (No. 26), page 14 “Nail Clippers”

But,
Japanese Patent Application Laid-Open No. 9-56447 “Tail clipping with scattering prevention”, Japanese Patent Application Laid-Open No. 2002-112831 “nipper-type nail clipper with a cover that does not allow nails to fly” is a technique related to prevention of nail crushing. Or for scissor technology, JP 2003-290571 “Scissors”, In addition to Japanese Laid-Open Patent Application No. 10-33849 Both are related to general scissors. Also The cutting edge of “nail clipper” is not different from general scissors in appearance. As described above, all are related to general scissors, and in particular, there are no other documents or techniques relating to the nail cutting of the human body.

Considering the shape of the nail, the cross-section of the nail viewed from the fingertip is similar to a part of a circle or an ellipse, and the nail tip viewed from a plane is a shape similar to a circle or an ellipse. The nails harden with age. On the other hand, the nails are required to be hygienic and clean for various occupations, and are easily noticeable, and for the sake of beauty, the nails are cut and aligned after a certain period.
Conventionally, as shown in FIGS. 8A, 8B, and 8C, the cutting edge of the exclusive claw cutting D has a pair of upper and lower first hook-shaped cutting edges 91 formed in a quadratic curve when viewed in plan, and a second hook-cutting blade edge. 92 is formed so that the claws are flattened. Therefore, when the nail is cut using this nail clip D, the nail having a curved surface is flattened and pressed all at once, and the fingertip hurts. Moreover, the nail | claw hardened | cured with aging may be cracked when it is made into a flat plate and pressed. In particular, when the toenails are cracked, the fibers of the socks are difficult to wear when the socks are worn, and when the socks are not worn, when the underwear or trousers are worn, they are caught by the fibers or seams, which causes discomfort. Also, once cracking occurs, the next time it is trimmed, it is easy to break and requires careful care.
Also, when using scissors, it is difficult to turn the scissors along the toe curve, and it is difficult to distinguish the boundary between the finger and the nail. . In particular, when someone else's nails are cut, the pain is unaware and dangerous. This has a problem with the shape of the edge of the nail cutter.
In view of the above, the present invention eliminates the danger of pain, cracking, and deep nails when cutting nails, and the nail that is trimmed to the toe that best matches the shape of the nail or the aesthetic that fits the user's will. The challenge is to provide a cut.

The means according to claim 1, which solves the above-mentioned problem, is a scissors mechanism in which a pair of upper and lower flanges each having a three-dimensional curved shape and having a sharpened edge are locked to a rotatable shaft system. And a pair of upper and lower pair of scissors, each of which is provided with a spring body having an appropriate drag force that always opens the pair of upper and lower scissors blade edges, and a gripping hand and a lever. The three-dimensional curved shape of the one-edged edge is a crossing locus in which the first arbitrary cylindrical shape or elliptic cylindrical shape and the second arbitrary cylindrical shape or elliptic cylindrical shape intersect perpendicularly or at an arbitrary angle, or any cylindrical shape or The oval cylindrical shape and the flat plate are used as a pawl for a three-dimensional curve-shaped cutting edge that is any one of intersection trajectories in which an elliptical intersection (excluding a vertical intersection) intersects.

According to a second aspect of the present invention, a pair of upper and lower ridges each having a cutting edge formed in a three-dimensional curved shape and aligned and polished are formed as a shearing mechanism, and the pair of upper and lower ridges are always open. The upper hook piece having elasticity is provided with a cutting lever, and the three-dimensional curve shape of the pair of upper and lower hook blade edges is a first arbitrary cylindrical shape or elliptic cylinder shape. Crossing trajectory where the second arbitrary cylindrical shape or elliptic cylinder intersects perpendicularly or at an arbitrary angle, or an intersection where any cylindrical shape or elliptic cylinder intersects a flat plate at an arbitrary angle (excluding the vertical intersection) It is a claw cut of a three-dimensional curved shape cutting edge which is one of the trajectories.

  According to a third aspect of the present invention, the pair of upper and lower scissors cutting edges formed by matching and polishing to form the three-dimensional curved shape according to the first and second aspects of the present invention are compatible with each other. It has a three-dimensional curved shape that is formed as a detachable replacement blade.

According to the first aspect of the present invention, the claw cutting of the three-dimensional curve-shaped cutting edge is configured such that a pair of upper and lower flanges each having a three-dimensional curved shape and having a sharpened edge are locked to a rotatable shaft system. The scissors mechanism is formed with a spring body having an appropriate drag force that always opens the pair of upper and lower scissors blades, a gripping hand, and a lever. It is formed to shear. On the other hand, the cross-sectional shape of the nail as viewed from the fingertip, or the toe as viewed in a plane is also circular or elliptical, and the nail that hardens with aging is trimmed and aligned after a certain period of time. If it is used, it is difficult to turn the scissors along the toe curve, and it is difficult to distinguish the boundary between the finger and the nail. When cutting, it is dangerous without noticing pain. This has a problem with the shape of the edge of the nail cutter. According to the present invention, it eliminates the pain of breaking nails, cracking of nails and the danger of deep nails, and it is used as a toe that most closely matches the shape of the nail or used for hygiene and cleanliness in various occupations. It is possible to provide the most effective claws that can be trimmed to the toes with a beautiful appearance.

In the claw cutting of the three-dimensional curved shape cutting edge according to the second aspect of the present invention, a pair of upper and lower flanges each having a three-dimensional curved shape and having a sharpened edge are formed as a shearing mechanism. Since the cutting lever is provided on the upper hook piece having a suitable elasticity with which the pair of hook pieces are always opened, the claw is formed so as to shear from one direction. About the effect, it is the same as that of the scissors mechanism of the said Claim 1, and detailed description is abbreviate | omitted.

  According to the third aspect of the present invention, the claw cutting of the three-dimensional curve-shaped cutting edge includes a pair of upper and lower scissor blade edges that are aligned and polished to form the three-dimensional curved shape according to the first and second aspects. Since it is formed as a detachable replacement blade that is compatible with both the upper and lower sides, it is possible to obtain a sharp cutting edge when the scissor blade edge is consumed, and a replacement blade claw that matches the shape of the nail. In addition, the cost is reduced and the effect is great.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment A constructed in the scissors mechanism of the present invention, and is an overall conceptual view of claw cutting provided with a three-dimensional curved edge. FIG. 2 shows a second embodiment B configured in the shearing mechanism of the present invention and is an overall conceptual view of claw cutting provided with a three-dimensional curved edge. FIG. 3 shows a conceptual diagram of the third embodiment C of the present invention, which is one embodiment of associating the detachable flange piece with the blade edge. FIG. 4 is a sectional view of the cutting edge of the present invention. FIG. 5 is a conceptual diagram showing a locked state between the shaft system and a pair of upper and lower flanges. FIG. 6 is a conceptual diagram of a spring body that keeps a pair of upper and lower scissors cutting edges always open. FIGS. 7a, 7b, 7c, and 7d are geometric conceptual diagrams showing the shapes of three-dimensional curved cutting edges applied to the first embodiment, the second embodiment, and the third embodiment of the present invention. Note that the intersection locus in this example is displayed as an elliptical cylinder of a cylindrical shape and an elliptical cylindrical shape. The same shape is given the same symbol.

  In the first embodiment, as shown in FIG. 1, a pair of upper and lower first hook pieces 10 and second hook pieces 20 have a first hook piece edge 11 and a second hook piece having a three-dimensional curved edge. A spring body 40 is provided which is ground and polished with the cutting edge 21 and is formed as a scissors mechanism via a rotatable shaft system 30, and the pair of upper and lower pair of flanges are always opened. This is a three-dimensional curve-shaped cutting edge pawl A configured by providing a cutting lever 50 on the piece 20. As shown in FIG. 4, the three-dimensional curved cutting edges 11, 12 incorporated in the scissor mechanism and subjected to alignment polishing are formed by respective tip portions 12, 22 and sliding surfaces 13, 23, and the sliding surface 13 On the 23 side, No. 2 (No. 2 may also be referred to as “escape”) 14 and 24 necessary as a cutter are provided on the large eyes. Further, as shown in FIG. 5, the scissors mechanism shaft system 30 includes a fixed portion 31 fixed to the first collar piece 10, and a rotating shaft locked to the second collar piece 20 via a locking member 34. The part 33 is formed to be rotatable. Further, the cutting lever 50 is provided on the upper surface of the second hook piece 20, and a grip portion 51 is provided on the lower surface of the first hook piece 10. In use, the grip lever 51 is grasped, and the cutting lever 50 is It is formed so that the nail is sheared by the first hook blade edge 11 and the second hook blade edge 21 held by the thumb. The cutting lever 50 provided on the upper surface of the second collar piece 20 is formed so as to be retractable like a chain line 53 by being turned upside down via a system stop shaft 52. Further, as shown in FIG. 6, the spring body 40 is fixed to either the first collar piece 10 or the second collar piece 20 (the first collar piece 10 in this example) with an end 41 using screws or the like. The other end 42 is provided in contact with the second collar piece 20, and the upper and lower collar blade edges 11, 12 are always kept in an appropriate open state. The spring body may be a helical spring instead of a leaf spring (not shown). Further, a stopper 43 (the rotation locking member 34 may be used) for stopping the upper and lower scissors cutting edges 11 and 21 at an appropriate position is provided. When the lever 50 is lowered as indicated by the arrow, the second hook blade edge 21 rotates as indicated by the arrow to shear the claw. A three-dimensional curve shape E shown in FIG. 7a is a three-dimensional curve of the X axis, the Y axis, and the Z axis formed with the geometric concept described below in FIGS. One elliptic cylinder 101 is set up vertically. The elliptic cylinder 101 has a total width of x on the X axis connecting the terminals, a height of y from the plane 102 on the Y axis, and a depth of z from a line connecting both ends of the elliptic cylinder 102. . In the cubic curve shape F shown in FIG. 7b, the first elliptic cylinder 101 is set up vertically on the plane 102, and the first elliptic cylinder 101 and the second elliptic cylinder 103 intersect each other in a straight line. It is a three-dimensional curve of an X axis, a Y axis, and a Z axis formed by a cross miracle. In the three-dimensional curved shape G shown in FIG. 7C, the first elliptic cylinder 101 is set up vertically on the plane 102, and the first elliptic cylinder 101 and the second elliptic cylinder 104 are at an arbitrary angle m °. It is a three-dimensional curve of the X axis, the Y axis, and the Z axis that intersect and are formed by the intersection miracle. Further, in the three-dimensional curve H shown in FIG. 7d, the first elliptic cylinder 101 stands vertically on the plane 102, and the first elliptic cylinder 101 and the plane plate 105 intersect at an arbitrary angle n ° (vertical intersection). And a three-dimensional curve of the X axis, the Y axis, and the Z axis formed by the cross miracle H.

  In the second embodiment, as shown in FIG. 2, the first and second pair of the first and second pair of first and second collar pieces 70 and 72 have a three-dimensional curved edge. 73 is formed as a shearing mechanism, and a cutting lever is provided on the upper hook 72 having a suitable elasticity with which the pair of upper and lower first hook blade edges 71 and the second hook blade edge 73 are always opened. This is a claw B of a three-dimensional curve-shaped cutting edge provided and configured. The pair of upper and lower scissors cutting edges 71 and 73 of this embodiment are formed in the same three-dimensional curved shape as that of the first embodiment described above. When the lever 79 is lowered as shown by the arrow, the second hook blade edge 73 is lowered to the position of the chain line 78 to shear the claw.

  In the third embodiment, as shown in FIG. 3, a pair of upper and lower first scissors 80 having a three-dimensional curve-shaped cutting edge and a second scissor piece 82 are respectively connected to the first scissors cutting edge 81 and the first scissors cutting edge 81. This is a replaceable blade that is configured to have compatibility with the main body side of the pawl A of the first embodiment and the pawl B of the second embodiment. The main replacement blade (hereinafter, the attachment / detachment structure of the upper / lower replacement blade will be described only on the side of the upper collar piece 82 because of the same procedure as the upper and lower parts) is provided with a positioning hole 83 in the center of the collar piece 82 and ant-shaped on both sides. 86 and 87, the body side 85 is formed with both ants 88 and 89 aligned with the ant shape, and has a latching portion 90 and a knob 92 that are inserted into the second collar piece 83. A retaining plate 91 formed of a detachable elastic body is provided on the main body side. Further, a notch 95 is provided in the center of the tip of the upper collar piece 83, and a notch 96 is provided in the hooking portion 90. By providing these notches 95 and 96, they can be pushed in and inserted as they are, and when removing them, it is only necessary to pick up the knob 92 and remove the latching portion 90 from the positioning hole 83.

  As described above, it is safe to use a three-dimensional curved nail clipper, while it is necessary for hygiene or aesthetics. In addition, with the current technology, it is easy to manufacture even slightly complicated instruments, and it is expected that the frequency of using low-cost instruments will be quite high.

The whole conceptual diagram of the nail clipper of the three-dimensional curve shape cutting edge which has a scissors mechanism. The whole conceptual diagram of the nail clipper of the three-dimensional curve shape cutting edge which has a shearing mechanism. The conceptual diagram of the nail cutting blade of the three-dimensional curve shape cutting edge which has a scissors mechanism and a shearing mechanism. Sectional drawing of the nail cutting blade of a three-dimensional curve-shaped blade edge | tip which has a scissors mechanism and a shearing mechanism. Sectional drawing of the three-dimensional curve-shaped blade edge | tip which has a shearing mechanism. Conceptual diagram of the shaft system structure provided in the scissors mechanism The whole conceptual diagram of the nail clipper of the three-dimensional curve shape cutting edge which has the conceptual diagram of the spring body provided in the scissors mechanism.

Explanation of symbols

A A scissor mechanism pawl with a three-dimensional curved edge B A shirring mechanism pawl with a three-dimensional curved edge C A claws replacement blade portion D with a removable blade replacement blade D Conventional pawl Cut,
E, F, G, H Intersection locus of 3D curve shape,
10 1st scissors, 11, 71, 81 1st scissors cutting edge, 20, 73, 83 2nd scissors,
21 2nd blade edge, 30 axis system, 40 spring body, 50 cutting lever,
101, 103 elliptical cylinder, 102 plane,
86, 87, 88, 89 Ant shape, 90 latching part, 96 insertion part.

Claims (3)

A pair of upper and lower scissors having a three-dimensional curved shape and having aligned and polished cutting edges are formed as a scissors mechanism locked to a rotatable shaft system, and the upper and lower pair of scissors cutting edges are always provided. It is a nail clipper comprising a spring body having an appropriate drag force to be released, a hand grip and a lever, and the three-dimensional curved shape of the pair of upper and lower scissors blade edges is a first arbitrary cylinder. Shape or elliptic cylinder and the intersection trajectory where the second arbitrary cylindrical shape or elliptic cylinder intersects perpendicularly or at an arbitrary angle, or any cylindrical shape or elliptic cylinder intersects with a flat plate at an arbitrary angle (vertical intersection) Claw cutting of a three-dimensional curved shape cutting edge, characterized in that it is one of the crossing trajectories to be excluded. A pair of upper and lower ridges having a three-dimensional curved shape and having aligned and polished cutting edges are formed as a shearing mechanism, and an upper ridge having moderate elasticity with which the pair of upper and lower pairs are always opened. A three-dimensional curved shape of the pair of upper and lower scissors blade edges is a first arbitrary cylindrical shape or an elliptic cylindrical shape and a second arbitrary cylindrical shape. Or any one of the intersection trajectory where the elliptic cylinder intersects perpendicularly or at an arbitrary angle, or the intersection trajectory where any cylinder or ellipse cylinder intersects the plane plate at an arbitrary angle (excluding the vertical intersection). Claw cutting of a 3D curve-shaped cutting edge characterized by being. The pair of upper and lower scissors blades formed by matching and polishing to form the three-dimensional curved shape of claim 1 and claim 2 are formed as interchangeable blades having compatibility with each scissors. 3D curve-shaped edge cutting.

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