RU2381728C1 - Manufacturing method of arched blade of clippers, blade of clippers, and clippers manufactured with this method - Google Patents

Abstract

FIELD: personal demand items. ^ SUBSTANCE: invention refers to manufacturing method of clippers. First, there shaped is upper blade and lower blade, which form blade body, with inclination at equal inclination angle. At that, one end of upper blade is connected to end of lower blade. Then there formed is inner surface with inclination of upper blade, which is directed downwards; the surface is made in the form of an arch curved inwards and having specified curvature and passing along the inclination directed downwards, and end of upper blade is shaped in vertical plane for forming the edge. At that, there shaped is inner surface with inclination of lower blade, which is directed upwards, and which is curved outwards in the form of an arch having the same curvature as the arch shape in upper blade, and passing along the inclination directed upwards, and end of lower blade is shaped in vertical plane for forming the edge. Then there provided is contact of two ends of upper and lower blades to each other, and two ends are ground simultaneously in vertical plane in order to shape the edge curved inwards in the form of arch on the end of upper blade, and the edge curved outwards in the form of an arch on the end of lower blade. There also proposed are curved blades of clippers and curved clippers themselves. ^ EFFECT: providing manufacture of quality products without a gap between concave arched edge and convex arched edge in the form of an arch. ^ 6 cl, 13 dwg

Description

FIELD OF THE INVENTION

The invention relates to a method for manufacturing arc blades of nail clippers for manicure and pedicure, and to arc blades and nippers; and, in particular, to a method for manufacturing arc cutting blades of nippers corresponding to a curved surface of a nail; and to arc blades and wire cutters made in this way.

State of the art

Arc-type nail clippers for manicure and pedicure (hereinafter referred to as the “nail clippers”) are characterized by the fact that the blades have an arc shape in vertical projection in order to correspond to the curved surface of the nail. Accordingly, when cutting the nail with these arc nippers, there is no unpleasant sensation due to the pressure first applied to both lateral ends of the nail, or due to breaking off the nail. Since it is believed that arc blades are very important when using arc pliers, in the last thirty years several patents have been filed for them. However, arc blades are ideal because they are not implemented in production. That is, due to production difficulties, arc blades are not manufactured on an industrial scale and are practically not used.

The prior art in terms of nippers related to this invention is described in several patents: Japanese Utility Model Publication No. Sho 49-8181 (January 24, 1974), 49-120419 (October 16, 1974), 52-66577 ( May 17, 1977), 51-119970 (September 12, 1977), 54-98369 (July 11, 1979), 54-116468 (August 15, 1979); Japan Patent Publication No. 2005-74135 (March 24, 2005), Uti Utility Model Publication Hei 01-145305, U.S. Patent Design No. 371636, and the like.

In addition to the prior art, many of the same ideas have been proposed. The prior art is mainly aimed at ensuring the contact of the edges of the upper and lower blades with each other on a curved surface. Patent search showed that the prior art does not describe the production technology for the implementation of the necessary arc blades. Those. The prior art has never proposed a technology for forming the edges of the upper and lower cutter blades in a three-dimensional arc shape and has not proposed a method for ensuring accurate contact of the edges with each other.

According to US patent for industrial design No. 371636 the edges of the upper and lower blades of the nippers are in contact with each other, forming a three-dimensional shape of the inclined arc corresponding to the curved surface of the nail. Similarly, although these arc edges of the blades can be constructed, there is no indication in the prior art on how to solve the technical problem of production technology.

Since the prior art generally does not disclose the manufacturing technology of arc blades, therefore, arc blades are not manufactured on an industrial scale. Japanese Patent Publication No. 2005-74135, which pays some attention to the manufacturing problem, aims to realize the upper and lower blades in the form of an arc in a completely different design, for the same purpose of use. But since the upper and lower edges are grinded independently and separately, therefore, production costs increase. Since the lower edge is not located close under the nail with the same thickness as the lower edge, therefore, cutting the nail is difficult.

In conventional wire cutters, the upper and lower edges extend from the bodies of the upper and lower blades to contact each other. Both edges, upper and lower, have an inclined shape and a slightly curved surface.

The upper and lower edges are sharpened simultaneously with a grinding wheel, the diameter of which corresponds to a curved surface. Then, after the diameter of the curved surface at the end of the edge coincides with the diameter of the grinding wheel, the upper and lower edges will be essentially horizontally parallel to each other - in vertical projection.

To form the edge of the arc shape in the vertical projection of the edge, the middle part of the concave arc edge must be formed in the form of an arc with an inward curvature; and the middle part of the lower edge must be formed in the form of an arc with an outward curvature so that the line of the upper and lower blades in contact with each other is in exact contact for smooth cutting of the nail. However, it is very difficult to contact the curved surfaces of the upper and lower edges with each other because of the shape of the edge, which is inclined and extends from the upper edge; due to the shape of the edge, which is inclined and extends from the lower edge; due to the diameter of the grinding wheel, the accuracy of the production equipment and the size of the grinding depth. As a result, a gap in the unpredictable directions may appear between the upper and lower edges, which may make the product unsuitable, depending on the variables listed above.

The prior art for the most part discloses a patentable schematic form of nippers with arc edges and its utility model. But the solutions offered by the prior art represent only an idea. Since there is no specific way to implement this idea, therefore, the prior art is practically not used.

SUMMARY OF THE INVENTION

Technical problem

The most important essential requirement for the manufacture of the arc of the upper and lower edges of the cutters is the formation of the upper and lower edges, precisely in contact with each other; due to the corresponding change in the grinding depth of the upper and lower edges and the simultaneous grinding of the upper and lower edges.

The edges of the nippers are grinded manually, semi-automatically or completely automatically by a grinding wheel, the diameter of which corresponds to the diameter of the curved surface of the end of the edge. The result of manual grinding gives a big difference, depending on the skill of the operator. Semi-automatic and automatic grinding creates a deviation, depending on the dimensional error of the fixing device for fixing the cutters, the error of the transmitting device and the degree of wear of the grinding belt.

In particular, when the edges of the nippers are formed three-dimensionally at the point of the arc, although the upper and lower edges are in contact in any three-dimensional space, it is almost impossible to produce nippers in which the curved surfaces of the upper and lower edges are in contact with each other, in accordance with the basic requirements mentioned above. It is possible to produce such nippers in small quantities as handicrafts or for a specific purpose. But since the uniform production of such nippers in large quantities is not substantiated either theoretically or technologically, therefore there is no industrial-made and practically used product.

Therefore, the aim of the invention is to provide a method for manufacturing arc cutting blades of cutters that are in exact contact with each other when the upper and lower edges are in contact with each other, with the obligatory contact of the two-dimensional arc edges with each other, providing a change in the grinding depth as the above-mentioned basic condition (change within about 0.2 mm from the reference value), while grinding the upper and lower edges; and in providing arc blades and wire cutters made in this way.

Technical solution

In arc nippers, which contain the body of the blade and the lever formed by the support rod passing through the hole for the support rod made in the body of the blade; arc nippers in which the curves of the convex and concave arc edges are precisely in contact with each other, are made in accordance with the method of manufacturing the arc blades for nippers, according to which form the upper blade and the lower blade forming the body of the blade, with an inclination at the same angle; wherein one end of the upper blade is connected to one end of the lower blade; forming the inner surface of the downward inclination of the upper blade with an inward curvature in the form of an arc having a predetermined curvature and extending along the downward inclination; and form the end of the upper blade in a vertical plane to form an edge; forming the inner surface of the upward inclined inclination of the lower blade with outward curvature in the form of an arc having the same curvature as the curvature of the arc shape in the upper blade and extending along the upward inclined inclination; and the end of the lower blade in a vertical plane to form an edge; provide the two ends of the upper and lower blades with the ability to contact each other, and grind the two ends simultaneously in a vertical plane to form an edge with an inward curvature in the form of an arc at the end of the upper blade, and an edge with an outward curvature in the form of an arc at the end of the lower blade .

In arc pliers, containing the body of the pliers with a hole for a supporting rod made on one side thereof, the blade body with an opening for a supporting rod and comprising an upper blade and a lower blade; and a lever on the case of the nippers, connected by a support rod to the blade body and the case of the nippers and acting as a lever; arc-type cutters in which the curves of the convex and concave arc edges are precisely in contact with each other, are made in accordance with the method of manufacturing arc cutting blades for cutters, according to which the upper blade and the lower blade are formed, forming the body of the blade with an inclination at the same angle, while one end of the upper blade is connected to one end of the lower blade; forming the inner surface of the downward inclination of the upper blade with the inward curvature in the form of an arc having a predetermined curvature and passing along the inclination; and form the end of the upper blade in a vertical plane to form an edge; forming the inner surface of the upward inclination of the lower blade with an outward curvature in the form of an arc that has the same curvature as the arc shape of the upper blade and which extends along the inclination; and the end of the lower blade in a vertical plane to form an edge; allow the two ends of the upper and lower blades to contact each other, and grind the two ends simultaneously in a vertical plane to form an edge with an inward curvature in the form of an arc at the end of the upper blade, and an edge with an outward curvature in the form of an arc at the end of the lower blade .

Technical Results

According to the method of manufacturing the arc blades of the cutters and the arc blades and the arc cutters according to the invention, the edge of the upper blade and the edge of the lower blade are simultaneously ground in the same vertical plane, while said edges are in contact with each other, while the concave arc edge is in the form of an arc formed at the end of the upper blade, and a convex arc edge in the form of an arc is formed at the end of the lower blade; and wherein the arc edges of the arc cutters are made in which the concave arc edge and the convex arc edge are precisely in contact with each other.

Since the curves of the concave arc edge and the convex arc edge in the shape of an arc do not change regardless of the change in the grinding depth, therefore, a high-quality product is made without a gap between the concave arc edge and the convex arc edge in the shape of an arc, and it is possible to produce a large number of products in a uniform manner.

Description of drawings

The accompanying drawings show preferred embodiments of the invention. The invention can be implemented in various forms, and should not be construed as limited by the implementations presented in the drawings.

1A is a perspective view of arc cutters in accordance with an embodiment of the present invention; Figv is a vertical projection of the body of the blade of the nippers shown in the drawing of figa;

2A is a perspective view of arc cutters according to another embodiment of the invention; Figv is a vertical projection of the body of the blade of the nippers shown in the drawing of Fig.2A;

Figure 3 shows the principle of the blades of arc cutters according to the invention;

Figure 4 is a view illustrating the blades of arc cutters, according to the invention;

Figa is a local section in perspective of the internal inclination of the upper blade according to the invention; Figv is a local section in perspective of the internal inclination of the lower blade;

6A shows that the end of the upper blade is cut vertically and is a vertical projection of a section in contact with a vertical plane; 6B shows that the end of the lower blade is cut vertically and is a vertical projection of a section in contact with a vertical plane;

7A is a local internal section in perspective of an edge formed by a slice of the end of the inner tilt of the upper blade; Figv is a local internal section in perspective of an edge formed by a slice of the internal inclination of the lower blade; and

Fig - concave and convex arc edges formed in the form of an arc and in contact with each other; provide contact between the edges of the upper blade and the edges of the lower blade, together and simultaneously grind the edges in a vertical plane.

The implementation of the invention

The invention is further described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

1A is a perspective view of arc cutters 100 in accordance with an embodiment of the present invention; Figv is a vertical projection of the body of the blade for the nippers 100 shown in the drawing of figa. 2A is a perspective view of arc cutters 200 according to another embodiment of the invention; Figv is a vertical projection of the body of the blade of the nippers 200 shown in the drawing of Fig.2A.

1A, the cutters 100 comprise a blade body 10 and a lever 120. The blade body 10 and the lever 120 are connected by a support rod 110 through an opening 31 for a support rod made in the blade body 10.

2A, the cutters 200 comprise a cutter body 210, a blade body 10 and a lever 230. The cutter body 210 has an opening 211 for a support rod at its end. The blade body 10 includes an opening 31 for the support rod, the upper blade 11 and the lower blade 21. The lever 230 is located on the cutter body 210 and is connected to the blade body 10 and the cutter body 210 by the support rod 220 to perform its lever function. The blade body 10 is rotatable 360 degrees around the support rod 220 with respect to the cutter body 210.

1A, the blade body 10 comprises an upper blade 11 and a lower blade 21. One end of the upper blade 11 and one end of the lower blade 21 are spot welded. 2A, the blade body 10 is formed by bending one side of the upper blade 11 and the lower blade 21 as a unit.

According figa body of the blade 10 is made in one piece by spot welding of the upper and lower blades 11 and 21, which are respectively made by stamping on the press. 2A, the blade body 10 is formed in one body by folding the upper and lower blades 11 and 21 by stamping on a press. The technology of forming arc edges, according to the invention, can also be implemented for nippers, the shape of which differs from the mentioned implementations. The body of the cutting blade described with reference to the drawings has the same reference designation “10”.

The blade body 10 comprises an upper blade 11 and a lower blade 21. The upper blade 11 and the lower blade 21 are formed with the same inclination, and one end of each blade is connected to the other.

The upper blade 11 comprises a downward inclined slope and an end. The inner surface of the downward slope has a concave arc shape with a predetermined curvature and is located along the downward slope. The end of the upper blade 11 is formed in a vertical plane and forms a concave arc edge 53. The lower blade 21 has an inwardly inclined inclination and an end. The inner surface of the upward slope has a convex arc shape that has the same curvature and extends along the upward slope. The end of the lower blade 21 is formed in a vertical plane to form a convex arc edge 54. When the concave arc edge 53 and the convex arc edge 54 are in contact with each other, the concave arc edge 53 and the convex arc edge 54 are grinded simultaneously in a vertical plane, thereby forming a concave arc edge 53 with a concave arc shape in the upper blade 11 and forming a convex arc edge 54 with a convex arc shape in the lower blade 21, thereby forming wire cutters 100 or 200 in which the curves are concave The hollow and convex arc edges are precisely in contact with each other.

^о влево на центральной точке пересечения Р кромок относительно фиг.3, и другая половина может симметрично повернуться на заданный угол

^о вправо. Затем концы лезвий разрезают вместе с половинами А1 и А2 цилиндров вдоль вертикальной плоскости VP относительно центральной точки Р пересечения, и разрезанные части слева, относительно фиг.3, удаляют. В результате этого внутренняя поверхность вогнутого наклона 52 верхнего лезвия 11 формируется в форме вогнутой дуги вдоль направленной внутрь искривленной поверхности дуги половины А1 цилиндра; и внутренняя поверхность наклона 51 нижнего лезвия 21 формируется в форме выпуклой дуги вдоль искривленной наружу поверхности дуги половины А2 цилиндра, и поэтому вогнутый наклон 52 верхнего лезвия 11, сформированного в форме вогнутой дуги, контактирует с наклоном 51 нижнего лезвия 21, сформированного в форме выпуклой дуги.Figure 3 shows the principle of the blades of arc cutters according to the invention. For example, the cylinder is divided into two parts along the length. Half of the cylinder is designated as A1 and the other half as A2. The diameter R1 of half A1 of the cylinder is equal to the diameter R2 of the other half of A2 of the cylinder. When the halves A1 and A1 of the cylinder are symmetrical, one of them can rotate by a given angle

^{about to the} left at the central intersection point P of the edges relative to figure 3, and the other half can rotate symmetrically at a given angle

^about right. Then, the ends of the blades are cut together with the halves A1 and A2 of the cylinders along the vertical plane VP relative to the central intersection point P, and the cut parts to the left, relative to FIG. 3, are removed. As a result, the inner surface of the concave slope 52 of the upper blade 11 is formed in the form of a concave arc along the inwardly curved surface of the arc of half cylinder A1; and the inner surface of the inclination 51 of the lower blade 21 is formed in the form of a convex arc along the outwardly curved arc surface of the cylinder half A2, and therefore, the concave inclination 52 of the upper blade 11 formed in the form of a concave arc is in contact with the inclination 51 of the lower blade 21 formed in the form of a convex arc .

Figure 4 illustrates the blades of arc nippers in accordance with this invention. Part A shows a side projection of the body of the blade, part B shows a convex slope 51, which is the inner surface of the lower blade 21; part C shows a concave inclination 52, which is the inner surface of the upper blade 11; part D shows a vertical projection of the body of the blade shown in part A; and parts E and F, respectively: horizontal projection and bottom view of the blade body shown in part A.

Referring to FIGS. 4-5B, the front end of the upper blade 11 externally forms a convex surface 55 along the slope to form a concave tilt 52 inside; and the front end of the lower blade 21 externally forms a concave surface 56 along the inclination with the formation of a convex inclination 51 inside. In this case, the convex inclination 51, which forms a convex arc edge, and the concave inclination 52, which forms a concave arc edge, respectively have diameters R1 and R2 of the curved surfaces of the cylinder halves. The diameters R1 and R2 of the curved surfaces of the halves of the cylinders must be the same - for the formation of the upper concave arc edge 53 and the convex arc edge 54, fitting to each other, as shown in part D of the drawing of figure 4.

5A, the concave inclination 52 of the upper blade 11 has the same design as the inner surface of the cylinder half A; and according to FIG. 5B, the convex slope 51 of the lower blade 21 has the same design as the inner surface of the cylinder half A2; moreover, the halves A1 and A2 of the cylinder must have the same diameter.

6A shows that the end of the upper blade 11 is cut in the vertical plane VP and is a vertical projection of the slice in contact with the vertical plane VP. 6B shows that the end of the lower blade is cut in the vertical plane VP and is a vertical projection of the slice in contact with the vertical plane VP. Figa shows an inside view of the edge of the upper blade 11, completely cut off. And the drawing of FIG. 7B shows an inside view of the edge of the lower blade 21, completely cut off.

8, when the concave arc edge 53 of the upper blade 11 and the convex arc edge 54 of the lower blade are fitted to each other, the concave and convex arc edges 53 and 54 are simultaneously ground by moving the vertical plane VP closer to the upper and lower blades 11 and 21 within grinding tolerance to form concave and convex arc edges 53 and 54, fitted to each other. Fig also shows a vertical projection of the edges in contact with the vertical plane VP.

As indicated above, a convex surface 55 is formed outside the front end of the upper blade 11 along the slope; and a concave surface 56 is formed outside the front end of the lower blade 21 along the slope. In this case, the nippers are effectively and expediently located under the nail, under which there is their outer concave surface 56 of the lower blade 21.

According to the invention, the internal slopes at which the edges are finally formed have the same angle of inclination in the upper blade 11 and the lower blade 21 and form a concave slope 52 and a convex slope 51 having the same diameter, as a result of which arc pliers are realized in which the concave arc edge 53 precisely in contact with a convex arc edge 54 in a two-dimensional vertical plane.

The invention is set forth as a description of preferred, exemplary embodiments. But it is understood that the scope of the invention is not limited to the disclosed embodiments. The scope of the invention is intended to include various modifications and alternative solutions that are obvious to those skilled in the art from existing and future technology and equivalents. Therefore, the scope of the claims should be construed as including all such modifications and similar solutions.

Claims (6)

1. A method of manufacturing arc blades of nail clippers for manicure and pedicure, according to which form the upper blade and the lower blade forming the body of the blade, with an inclination at the same angle; moreover, one end of the upper blade is connected to one end of the lower blade; forming an inner surface with a downward inclining of the upper blade, curved inward in the form of an arc having a predetermined curvature and extending along the downward inclination; and form the end of the upper blade in a vertical plane to form an edge; forming an inner surface with an upward inclined inclination of the lower blade, curved outward in the form of an arc having the same curvature as the arc shape in the upper blade, and extending along the upward inclined inclination; and forming the end of the lower blade in a vertical plane to form an edge; provide contact between the two ends of the upper and lower blades and grind the two ends simultaneously in a vertical plane to form an inwardly curved edge at the end of the upper blade and an outwardly curved edge at the end of the lower blade. 2. Arc blades of nail clippers for manicure and pedicure containing
the upper blade and the lower blade forming the body of the blade and formed with an inclination at the same angle of inclination; wherein one end of the upper blade is connected to one end of the lower blade; downward inclination of the upper blade; moreover, the inner surface of the downward inclined inclination is formed with an inward curvature in the form of an arc having a predetermined curvature and extending along the downward inclined inclination; an upper blade end formed in a vertical plane to form an edge; an upwardly inclined lower blade having an inner surface curved outward in an arc shape having the same curvature as the arc shape of the upper blade and extending along a vertical inclination; and an end of a lower blade formed in a vertical plane to form an edge; and while the two ends of the upper and lower blades are in contact with each other for simultaneous grinding in a vertical plane to form an edge curved inward in the form of an arc at the end of the upper blade and an edge curved outward in the form of an arc at the end of the lower blade . 3. Arc blades according to claim 2, in which the upper blade and the lower blade are connected as one body by welding through electric rivets or spot welding of the other end of the upper blade and the other end of the lower blade. 4. Arc blades according to claim 2, in which the upper blade and the lower blade are formed as a whole in the form of the other end of the upper blade and the other end of the lower blade formed for folding. 5. Arc nippers for manicure and pedicure, which contain the body of the blade and the lever formed by the support rod passing through the hole for the support rod formed in the body of the blade, containing the upper blade and lower blade forming the body of the blade and formed with an inclination at the same angle so that one end of the upper blade is connected to one end of the lower blade; a downwardly inclined upper blade inclination having an inner surface formed with an inward curvature in the form of an arc having a predetermined curvature and extending along a downwardly inclined inclination; an end of the upper blade, said end being formed in a vertical plane to form an edge; an upwardly inclined lower blade having an inner surface curved outward in an arc shape having the same curvature as the arc shape of the upper blade and extending along an upwardly inclined inclination; an end of a lower blade formed in a vertical plane to form an edge; and while the two ends of the upper and lower blades are in contact with each other for simultaneous grinding in a vertical plane to form an edge, curved inward, in the form of an arc, at the end of the upper blade, and an edge, curved forward, in the form of an arc, on end of lower blade. 6. Arc nippers for manicure and pedicure, which contain the body of the nippers with a hole for the support rod, made on one side of it; the blade body with a hole for the support rod containing the upper blade and the lower blade, and a lever mounted on the body of the clippers and connected by the support rod to the body of the blade and the body of the clippers to perform a lever function, and which also comprise an upper blade and a lower blade forming the blade body and made with a slope at the same angle; wherein one end of the upper blade is connected to one end of the lower blade; downward inclination of the upper blade; moreover, the inner surface of the downward inclined inclination is formed with an inward curvature in the form of an arc having a predetermined curvature and extending along the downward inclined inclination; an upper blade end formed in a vertical plane to form an edge; an upward inclined slope of the lower blade having an inner surface with an external curvature in the form of an arc having the same curvature as the arc shape of the upper blade and extending along the upward inclined slope; and an end of a lower blade formed in a vertical plane to form an edge; and while the two ends of the upper and lower blades are in contact with each other for simultaneous grinding in a vertical plane to form an edge curved inward in the form of an arc at the end of the upper blade and an edge curved outward in the form of an arc at the end of the lower blades.

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