JP2009523053A - Manufacturing method of arc-type nail-cutting blade body, nail-cutting blade body by this, and nail-cutting device - Google Patents

Abstract

The present invention relates to a method of manufacturing an arc-type nail clipper blade that matches the curved surface of a nail, a nail clipper blade body, and a nail clipper. One end of the upper blade body and the lower blade body constituting the nail cutting blade body is inclined with the same inclination angle so that the upper and lower sides are in contact with each other, and the inside of the downward inclined surface of the upper blade body has a certain curvature. The concave arc is extended along the inclined surface, cutting the edge where the blade is formed into a vertical plane, and the inside of the upward inclined surface of the lower blade body is inclined by the swollen arc having the same curvature as the upper side Extending along the surface, the end where the blade is formed is cut into a vertical plane. When the upper and lower blades are brought into contact with each other and polished to a vertical plane at the same time, the upper blade body becomes a concave arc-shaped blade, the lower blade body becomes a bulging arc-shaped blade, and the arc in which the upper and lower blade curves precisely match. It is characterized by constituting a mold nail cutter blade body.
[Selection] Figure 4

Description

The present invention relates to a nail clipper, and more particularly to a method for manufacturing an arc-type nail clipper blade that matches a curved surface of a nail, a nail clipper blade body, and a nail clipper.

In the arc-type nail clipper, when the blade is viewed from the front, the shape of the blade is an arc shape, and when the nail is cut, it almost matches the curved surface of the nail. Therefore, both ends of the nail receive force first, and the feature is that the feeling when cutting is bad and the phenomenon that the nail is broken is eliminated, and this type of blade is extremely important when actually used Many patents related to this have been filed for more than 30 years, but this is only one ideal idea. Actually, it is a product that has been commercialized or put into practical use due to manufacturing problems. There was no.

As prior art of arc-type nail clippers according to the present invention, Japanese Utility Model Publication No. 49-8181 (January 24, 1974), Japanese Utility Model Publication No. 49-120419 (October 16, 1974), Japan Japanese Utility Model Sho 52-66577 (May 17, 1977), Japanese Japanese Utility Model 51-119970 (September 12, 1977), Japanese Japanese Utility Model 54-98369 (July 11, 1979) No. 54-116468 (August 15, 1979), Japanese Unexamined Patent Application Publication No. 2005-74135 (March 24, 2005), Japanese Utility Model Laid-Open No. 01-145305, US Design Patent Des. A number of patents have been filed, such as 371,636.

In addition to the prior art examples, there are many same ideas, but most of them only desire that the shapes of the upper and lower cutting edges abut on the curved surface. As a result of investigating the prior art, there was no content to manufacture an ideal arc-type nail clipper blade in terms of manufacturing technology. That is, there is no technical disclosure of how the upper and lower blade edges of the upper and lower blade bodies constituting the nail clipper blade form an arc shape and mesh accurately in a three-dimensional space.

US design patent Des. In 371,636, the upper and lower cutting edges of the nail clipper have an arc shape inclined in a three-dimensional space and meshed with the curved surface of the nail, which is possible only by design, and manufactured. The technical issues are not disclosed.

Since many prior arts do not disclose a technique for manufacturing arc-type nail clippers, there are no products that have been commercially available so far. However, Japanese Patent Application Laid-Open No. 2005-74135 is the one that understands the most difficult manufacturing problems and has the same purpose of use, but is characterized by trying the upper and lower blades as completely different structures. However, the manufacturing cost increases because the upper and lower blades must be separately polished. In addition, there is a disadvantage in that the thickness of the lower blade cannot be approached under the nail when used and the nail cannot be easily cut.

A general nail clipper is extended from an upper and lower blade body so that the upper and lower blades are in contact with each other, and is formed so as to be inclined, and has a slightly concave curved surface.

Using a polishing roller having a diameter corresponding to the curved surface, the upper and lower blades are simultaneously polished and sharpened. At this time, if the diameter of the curved surface of the blade edge is the same as the diameter of the polishing roller, the upper and lower blades are generally parallel to each other when viewed from the front surface of the blade.

When viewed from the front of the blade, if an arc type blade is to be formed, the upper blade becomes an arc type with a concave center, and the lower blade has an arc type blade with a swelled center, and the upper and lower lines mesh. The nail can be cut cleanly only when it is precisely matched. However, depending on the shape of the blade body that is inclined and extended from the upper blade body, the shape of the blade body that is inclined and extended from the lower blade body, the diameter of the polishing roller, the precision of the processing machine, and the degree of polishing depth, Matching the arc-shaped curved surface of the blade is a very difficult task.
As a result, it is difficult to predict such various variables, and there is a gap between the upper and lower blades.

Most prior patents claim only a technique relating to the general shape and utility of arc-shaped blade nail clippers, but this is only an idea. Since there is no concrete way to implement this, it has not been put into practical use.
Japanese National Kaikai 49-8181 (January 24, 1974) Japanese National Kaikai 49-120419 (October 16, 1974) Japanese National Kaisho 52-66577 (May 17, 1977) Japanese National Kaisho 51-11970 (September 12, 1977) Japanese National Kaisho 54-98369 (July 11, 1979) Japanese National Kaisho 54-116468 (August 15, 1979) Japanese Unexamined Patent Application Publication No. 2005-74135 (March 24, 2005) Japan National Kaihei 01-145305 US design patent Des. 371,636

The most important basic condition in the manufacture of nail-cutting arc type upper and lower blades is the arc type in which deviation between the upper and lower blades is sufficiently allowed, and the upper and lower blades are ground simultaneously and the upper and lower blades are engaged accurately. The blade must be formed.

Polishing of the nail cutting blade is classified into manual, semi-automatic, and fully automatic, and is generally performed using a polishing roller that matches the diameter of the curved surface of the blade edge. In manual operation, there is a large difference in the result depending on the skill level of the operator. In semi-automatic and fully automatic, various deviations occur depending on the deviation of the nail clipper fixing mechanism, the deviation of the transfer mechanism, and the degree of wear of the polishing belt.

In particular, in the case of a three-dimensional nail-cutting arc-shaped blade, even if the upper and lower blades can be matched in a three-dimensional space, the manufacture of the nail-cutting in which the curved surfaces of the upper and lower blades match in a state satisfying the basic conditions It was almost impossible. Of course, it may be possible to manufacture small quantities in accordance with the hand products and purposes, but the production of uniform large quantities has not been supported theoretically and technically and has been put into practical use until now. No product was used.

Accordingly, in the present invention, arc-shaped blades that mesh with each other in two dimensions are formed, and deviation from the polishing depth, which is the basic condition described above (deviation is within about ± 0.2 mm of the reference value) is allowed. However, it is possible to provide an arc type nail cutting blade body manufacturing method that can accurately match when the upper and lower blades mesh with each other under the conditions for polishing the upper and lower blades simultaneously, and a nail cutting blade body and a nail cutting device thereby. Is the purpose.

Therefore, the present invention provides a nail-cutting blade body and an upper blade constituting the nail-cutting blade body in a nail-cutting device in which a lever is formed using a support shaft penetrating a support shaft hole formed in the blade body as a medium. One end of the body and the lower blade body is inclined with the same inclination angle so that the upper and lower sides are in contact with each other, and the inside of the downward inclined surface of the upper blade body has a concave arc with a certain curvature along the inclined surface The edge where the blade is formed is formed in a vertical plane, and the inside of the upward inclined surface of the lower blade body is formed by extending a bulging arc having the same curvature as the upper side along the inclined surface. When the edge where the blade is formed is formed on a single vertical plane and the upper and lower blades are brought into contact with each other and polished simultaneously on the single vertical plane, the upper blade body becomes a concave arc type blade and the lower blade body swells. It becomes an arc type blade, and the arc type nail clipper in which the curves of the upper and lower blades precisely match each other is formed.

The present invention also provides a nail clipper body having a spindle hole formed on one side thereof, a nail clipper blade body having a spindle hole and composed of an upper blade body and a lower blade body, and the nail clipper body. In a nail clipper having a lever that is located at the upper portion and is connected via a blade body and a body through a support shaft and acts as a lever, one end of the upper blade body and the lower blade body constituting the nail clip blade body is Inclined with the same inclination angle so that they are in contact with each other up and down, and inside the downward inclined surface of the upper blade body, a concave arc of a certain curvature is extended along the inclined surface to form a blade. The end portion is formed in a vertical plane, and the inner side of the upward inclined surface of the lower blade body is an end portion where a bulging arc having the same curvature as the upper side is extended along the inclined surface to form a blade If the upper and lower blades are brought into contact with each other and polished to the same vertical plane at the same time, the upper blade body is recessed. Bother type blades, the lower blade is turned to the blade bulging, characterized in that it constitutes the arc type nail clipper in which the curve of the upper and lower blades are matched finely.

According to the arc type blade body and the arc type nail clipper of the present invention, when the upper and lower arc blades are brought into contact with each other and simultaneously polished on a vertical plane, the upper blade becomes a concave arc-shaped curved surface and the lower blade is a swollen arc. An arc-type nail-cutting blade in which the upper and lower blades precisely match each other can be manufactured.

In particular, the curve of the upper and lower arc type blades does not change regardless of the deviation of the polishing depth, and as a result, an elaborate product with no gaps is produced, and there is an effect that this can be produced in a large amount in a constant manner.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a perspective view of an arc nail clipper 100 according to an embodiment of the present invention, FIG. 1B is a front view of the nail clipper blade shown in FIG. 1A, and FIG. It is a perspective view of arc type nail clipper 200 which is other one embodiment, and Drawing 2B is a front view of a nail clipper blade object shown in Drawing 2A.

A nail clipper 100 shown in FIG. 1A as an embodiment forms a lever 120 with a nail clipper blade 10 and a support shaft 110 penetrating a support shaft hole 31 formed in the blade body 10 as a medium. Composed.

A nail clipper 200 shown as another embodiment in FIG. 2A has a nail clipper body 210 having a support shaft hole 211 formed on one side, a support shaft hole 31, and an upper blade body 11 and a lower blade body 21. And a lever 230 which is located above the nail clipper body 210 and is connected via the support shaft 220 via the blade body 10 and the body 210 to perform a lever action. The nail cutting blade body 10 is formed so as to be rotatable at 360 ° C. by the body 210 about the support shaft 220.

In the above, the nail cutting blade body 10 illustrated in FIG. 1A is composed of the upper blade body 11 and the lower blade 21, and one end is configured as a fixing means such as spot welding, and the nail illustrated in FIG. 2A. The cutting blade body 10 exemplifies what is integrally formed by bending one side of the upper blade body 11 and the lower blade body 21.

The nail cutting blade body 10 illustrated in FIG. 1A is obtained by manufacturing an upper blade body 11 and a lower blade body 21 in a pressing process and then integrating them by spot welding. In the case of the nail clipper blade body 10 shown in FIG. 2A, the upper blade body 11 and the lower blade body 21 are formed into one by bending in the pressing process. The present invention can realize a technique for forming an arc-shaped blade in the embodiment of the nail cutter blade body 10 having the two types of shapes, and will be described below with reference to the drawings. Are all denoted by the same reference numeral “10”.

The nail cutting blade body 10 includes an upper blade body 11 and a lower blade body 21. The upper and lower blade bodies 11 and 21 are formed so as to be inclined with the same inclination angle so that the upper and lower ends of one end thereof are in contact with each other.

On the inner side of the downward inclined surface 55 of the upper blade body 11, an arc having a certain curvature is extended along the inclined surface, and an end portion on which the blade 53 is formed is formed in a vertical plane, and the lower blade body is formed. On the inner side of the upward inclined surface 56 of 21, a swollen arc having the same curvature as the upper side is extended along the inclined surface. An end of the lower blade body 21 is formed on a vertical surface on which the arc-shaped blade 54 is formed. When the vertical plane is simultaneously polished when the upper and lower blades 53 and 54 come into contact with each other, the upper blade body 11 becomes a concave arc-shaped blade 53, and the lower blade body 21 becomes a swollen arc-shaped blade 54, and An arc-type nail clipper 100 or 200 in which the blade curves are precisely matched is formed.

FIG. 3 is a diagram showing the principle of the arc-type nail cutting blade of the present invention. For example, the cylinder is divided into two parts in the longitudinal direction. Half of the cylinder is designated A1 and the other half is designated A2. The diameter R1 of A1 is the same as the diameter R2 of the other half cylinder A2. When A1 and A2 are erected symmetrically upright, one is rotated a certain angle a ° to the left with respect to the center intersection P of the blade, and the other is a ' Rotate. Then, the edge of the blade is cut along one vertical plane VP with respect to the center intersection P of the blade, together with the half cylinders A1 and A2, and the cut portion on the left side is removed as shown in FIG. Then, the inner surface of the concave inclined surface 52 of the upper blade body 11 is formed in an arc shape that is recessed along the arc inner inclination of the half cylinder A1, and the inner surface of the inclined surface 51 of the lower blade body 21 is the other half. A swelled arc shape is formed along the slope of the swelled arc of the cylinder A2. Therefore, the concave inclined surface of the upper blade body 11 formed in the concave arc shape is in contact with the inclined surface 51 of the lower blade body 21 formed in the bulged arc shape.

FIG. 4 is a view for explaining an arc-type nail clipper blade according to the present invention. A portion shown as A is a side view of the nail cutting blade body, B shows a convex inclined surface 51 on the inner surface of the lower blade body 21, and C shows an inner surface of the upper blade body 11. , D is a front view of A, and E and F are a plan view and a bottom view of A, respectively.

As shown in FIGS. 4 to 5B, a convex surface 55 is formed along the inclination on the outer side of the tip of the upper blade body 11, a concave inclined surface 52 is formed on the inner side, and the tip of the lower blade body 21 is formed. A concave surface 56 is formed on the outer side along the inclination, and a convex inclined surface 51 is formed on the inner side. Thereby, the convex inclined surface 51 which forms a lower blade, and the concave inclined surface 52 which forms an upper blade are comprised by the diameters R1 and R2 of a semi-cylindrical curved surface, respectively. At this time, when the diameters R1 and R2 of the semi-cylindrical curved surface are always matched, the upper concave arc blade 53 and the lower convex arc blade 54 are formed to mesh with each other as shown as D in FIG.

5A is a concept in which the concave inclined surface 52 of the upper blade body 11 is the same as the inner surface of the cylinder A1, and FIG. 5B is a concept in which the convex inclined surface 51 of the lower blade body 21 is the same as the outer surface of the cylinder A2. The half cylinders A1 and A2 must have the same diameter.

6A is a view in which the end of the upper blade 11 is cut with reference to the vertical plane VP, and a cut surface in contact with the vertical plane VP is viewed from the front, and FIG. 6B is an end of the lower blade 21 Is a view of a cut surface in contact with the vertical plane VP as viewed from the front. FIG. 7A is an internal view of the end of the upper blade body 11 that has been completely cut, and FIG. 7B is an internal view of the end of the lower blade body 21 that has been completely cut.

In FIG. 8, when the concave arc blade 53 and the convex arc blade 54 of the upper and lower blade bodies 11 and 21 mesh with each other, the vertical plane VP moves further toward the blade bodies 11 and 21 within the polishing deviation range. The blades 53 and 54 are polished simultaneously so that the upper and lower sides coincide. FIG. 8 is a front view of the blade part in contact with the vertical plane VP.

On the other hand, a convex surface 55 is formed along the inclination on the outer side of the tip of the upper blade body 11 described above, and a concave surface 56 is formed along the inclination on the outer side of the tip of the lower blade body 21. This allows the nail clipper to be effectively and easily fitted under the nail by the concave surface 56 of the lower blade body 21.

As described above, according to the present invention, in the upper blade body 11 and the lower blade body 21, the inner inclined surfaces that finally form the blades have the same inclination angle in the vertical direction, and at the same time, the concave inclined surface 52 having the same diameter. Further, by forming the convex inclined surface 51, an arc-type nail clipper in which the concave arc blade 53 and the convex arc blade 54 are finely engaged with a two-dimensional vertical plane is realized.

As described above, the present invention has been described using the preferred embodiment. However, the present invention is not limited to this. On the contrary, various modifications and variations are possible within the scope of those skilled in the art to which the present invention pertains or future technology in the field or equivalent. Therefore, the scope of the claims is appropriate for the broadest interpretation covering all modifications and similar processes.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and the present invention should not be construed as limited to the matters described in these drawings.

It is a perspective view of the arc type nail clipper which is one embodiment of the present invention. It is a front view of the nail clipper blade body shown by FIG. 1A. It is a perspective view of the arc type nail clipper which is other one embodiment of the present invention. It is a front view of the nail clipper blade body shown by FIG. 2A. It is a principle figure of the arc type nail clipper blade body of the present invention. It is explanatory drawing of the arc type nail clipper blade body of this invention. It is a partially cut perspective view which shows the inner side inclined surface of the upper blade body of this invention. It is a partially cut perspective view which shows the inner side inclined surface of the lower blade body of this invention. FIG. 5 is a view of a cut surface in contact with the vertical plane, as viewed from the front, showing the end portion of the upper blade body of the present invention based on the vertical plane. It is showing that the end of the lower blade body is cut on the basis of a vertical plane, and is a view of a cut surface in contact with the vertical plane as viewed from the front. The edge part of the inclined surface of the upper blade body of this invention is the partially cut perspective view which has shown the blade which cutting completed inside. The edge part of the inclined surface of a lower blade body is a partially cut perspective view which has shown the blade which cutting completed inside. It is the figure which showed the arc type blade which the blade of the upper-and-lower blade body of this invention meshes | engages and grind | polishes simultaneously on a perpendicular | vertical plane, and the upper and lower sides correspond.

Claims (6)

One end of the upper blade body and the lower blade body constituting the nail cutting blade body is inclined with the same inclination angle so that the upper and lower sides are in contact with each other, and the inside of the downward inclined surface of the upper blade body has a constant curvature. The concave arc is extended along the inclined surface to form an end on which the blade is formed in a vertical plane, and the inside of the upward inclined surface of the lower blade body bulges with the same curvature as the upper side When the arc is extended along the inclined surface, the end where the blade is formed is formed in a vertical plane, and when the upper and lower blades are brought into contact with each other and simultaneously polished in the vertical plane, the upper blade body is a concave arc type blade. The method for manufacturing an arc-type nail-cutting blade is characterized in that the lower blade becomes a bulging arc-shaped blade. In the nail cutter blade body constituted by the upper blade body and the lower blade body, one end of the upper blade body and the lower blade body is inclined with the same inclination angle so that the upper and lower sides are in contact with each other, and the upper blade body The inside of the downward inclined surface is formed by extending a concave arc with a certain curvature along the inclined surface to form an end on which the blade is formed in a vertical plane, and inside the upward inclined surface of the lower blade body. The bulging arc with the same curvature as the upper side is extended along the inclined surface, the end where the blade is formed is formed in a vertical plane, and the upper and lower blades are brought into contact with each other and simultaneously polished in the vertical plane Then, the arc cutter is characterized in that the upper blade body is a concave arc type blade and the lower blade body is a swollen arc type blade. The arc-type nail-cutting blade body according to claim 2, wherein the upper blade body and the lower blade body are integrally formed on one side by rivet welding or spot welding. The arc-type nail-cutting blade body according to claim 2, wherein the upper blade body and the lower blade body are integrally formed by bending one side. In a nail clipper in which a lever is formed through a nail-cutting blade body and a support shaft penetrating a support shaft hole formed in the blade body,
One end of the upper blade body and the lower blade body constituting the nail clipper blade body is inclined with the same inclination angle so that the upper and lower surfaces are in contact with each other, and the inner side of the downward inclined surface of the upper blade body is constant. A concave arc of curvature is extended along the inclined surface to form an end where the blade is formed in a single vertical plane, and the inside of the upward inclined surface of the lower blade body is swollen with the same curvature as the upper side When the arc is extended along the inclined surface, the edge where the blade is formed is formed in a single vertical plane, and the upper and lower blades are brought into contact with each other and simultaneously polished into a single vertical plane, the upper blade body has a concave arc shape. Arc-type nail clipper, characterized in that it becomes a blade and the lower blade body becomes a bulging arc-type blade. A nail clipper body having a support shaft hole formed on one side, a nail clipper blade body having a support shaft hole and composed of an upper blade body and a lower blade body, and positioned above the nail clipper body. In a nail clipper comprising a lever and a lever that are connected via a blade and a body through an axis,
One end of the upper blade body and the lower blade body constituting the nail clipper blade body is inclined with the same inclination angle so as to contact each other vertically, and the inside of the downward inclined surface of the upper blade body is fixed. A concave arc of curvature is extended along the inclined surface to form an end where the blade is formed in a single vertical plane, and the inside of the upward inclined surface of the lower blade body is swollen with the same curvature as the upper side When the arc is extended along the inclined surface, the edge where the blade is formed is formed in a single vertical plane, and the upper and lower blades are brought into contact with each other and simultaneously polished into a single vertical plane, the upper blade body has a concave arc shape. Arc-type nail clipper, characterized in that it becomes a blade and the lower blade body becomes a bulging arc-type blade.

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