CN109965955B

CN109965955B - Cocoon remover with cutting edge

Info

Publication number: CN109965955B
Application number: CN201811478806.6A
Authority: CN
Inventors: 韩正植; 金京希
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-27
Filing date: 2018-12-05
Publication date: 2022-03-01
Anticipated expiration: 2038-12-05
Also published as: WO2019132271A1; CN109965955A

Abstract

The present invention provides a callus removal plate arranged with a plurality of micro-cutters, wherein each micro-cutter has an increased cutting length by adding a bottom edge to a first cutting edge and a second cutting edge having a top edge and a side edge, thereby providing a sharpening effect to easily remove a callus, wherein the plurality of micro-cutters are formed on the cutter plate in a curved shape, which can minimize a contact area with a user's skin, thereby easily removing the callus from the skin with a small force even at a depressed portion of a foot, and wherein the callus removal plate can be assembled to the callus remover by changing its longitudinal direction to extend its service life by using an unworn cutting edge in another direction.

Description

Cocoon remover with cutting edge

Cross Reference to Related Applications

The present application is based on and claims priority from korean patent application No. 10-2017-0180542, filed on 27.12.2017, and korean patent application No. 10-2018-0123741, filed on 17.10.2018, the disclosures of which are incorporated herein by reference in their entireties.

Technical Field

The present invention relates to a cocoon remover, and more particularly, to a cocoon remover having an improved blade shape, which can easily remove cocoons formed on skin with a small force.

Background

Generally, calluses (calluses) are thickened dead skin that is formed as a result of repeated rubbing, pressure, or irritation. Calluses can be found on the foot, are generally not harmful, but are unsightly and can sometimes cause skin ulcers or infections.

Conventionally, four typical mechanisms for removing or eliminating calluses from the skin are known. Calluses can be polished with pumice, filed with a razor, dissolved with a reagent containing salicylic acid, and removed or removed with a cutting edge. For example, U.S. patent application publication No. 2005/0061343a1 discloses a callus remover having a pressure plate and a cutting edge, and U.S. patent application publication No. 2007/044491a1 describes a skin problem remover with a razor blade that is disposable after use. Korean patent registration No. 10-1184144 (hereinafter referred to as '144 patent') describes a callus remover provided with a plurality of micro-cutters, which was issued to the applicant of the present invention on 9/12/2012.

Since the present invention was designed and developed to improve the callus remover of the' 144 patent, the latter will be described in detail. The callus remover of the' 144 patent is arranged with a plurality of substantially circular small blades fabricated on a thin metal plate, called a callus removal plate (hereinafter referred to as "microcutter"), and is popular with customers due to its excellent operability.

Each of the micro-cutters has a planar protruding plate having a circular or polygonal shape of a predetermined size, which is raised at a height less than 0.5mm from an outer surface of the cocoon removing plate. The raised projection plate is connected to the outer surface of the cocoon removal plate by a pair of bridges having a width W less than the longitudinal length of the projection plate. Openings are formed along the perimeter (periphery) of the protruding board on both sides of the bridge between the raised protruding board and the outer surface of the callus removal board. The calluses that are cut or removed pass through the respective openings. The projecting plate is formed with a cutting edge having an acute angle along the periphery of the projecting plate at its distal end except for a portion forming the bridge. The cutting edge is configured to cut or remove calluses from the skin in any direction thereof.

The cocoon removal plate of the' 144 patent is integrally formed with the cocoon remover such that the cutting edge wears in the cocoon remover in only one working direction. For example, the forward direction is defined as a direction away from the handle of the cocoon remover, and the backward direction is defined as a direction approaching the handle. If a user habitually uses the cocoon remover by pushing or pulling in a forward or backward direction in order to remove the calluses on the feet, the cutting edge of one direction is mainly used so that the cutting edge of the one direction is easily worn, but the cutting edge of the other direction is hardly worn and remains a new one. Therefore, even though there is still an unworn or almost new cutting edge in the other direction thereof, there is a disadvantage of discarding the cocoon remover due to its poor cutting ability.

Meanwhile, the callus remover of the' 144 patent requires relatively much force to remove the calluses on the skin. The plurality of micro-cutters are disposed on the same plane, wherein all cutting edges, i.e., the protruding plates of the micro-cutters, are elevated at the same height from the planar outer surface of the callus-removing plate. Thus, almost all of the micro-cutters are arranged to simultaneously face and contact the skin when applied to the foot, such that each micro-cutter is configured to simultaneously penetrate calluses on the foot during a calluses removal action, which results in the disadvantage of requiring more force at a time to remove the calluses.

Further, it has been found that the cocoon remover of the' 144 patent tends to lose contact with a body portion of the user, which body portion (e.g., a concave or arcuate portion on the foot) has a width that is narrower than the width of the cocoon remover, making it difficult to cleanly remove or clean the cocoons thereon.

The protruding plate of the cocoon remover of the' 144 patent is formed substantially in a circular shape and the cutting edge formed along the periphery thereof has a radius of curvature smaller than the circular shape, and it is inconvenient for a user to push or pull the cocoon remover in an inclined manner with a greater force with respect to the longitudinal direction (length direction) of the cocoon remover.

Disclosure of Invention

Accordingly, it is an object of the present invention to provide a callus removal plate that easily removes calluses on the skin with a small force by using a sharpening effect of a micro cutter.

It is another object of the present invention to provide a cocoon remover having a cocoon removing plate which can be assembled in opposite directions and can be replaced when a cutting edge is worn, thereby maximizing the use of a micro cutter and extending the life span of the cocoon remover.

In order to achieve the above object, according to one aspect of the present invention, there is provided a callus removal plate, comprising: a cutter plate; a plurality of micro-cutters arranged on the cutter plate to perform a cocoon cutting action, each micro-cutter including a protruding plate formed substantially in an elliptical shape and elevated at a predetermined height from an outer surface of the cutter plate; a pair of bridges extending from the cutter plate and oppositely arranged from the cutter plate to support the projection plate; a cutting edge formed at a periphery of the protruding plate and having an acute angle to cut calluses on the skin; and openings formed along a periphery of the protruding plate on both sides of the bridge for passing calluses removed by the cutting edges, wherein the cutting edges include a first cutting edge and a second cutting edge forming a substantially symmetrical shape with the first cutting edge, and wherein the shape of the protruding plate satisfies a conditional expression of H ≧ 2R + W, where H is a distance between each top of the first and second cutting edges in a longitudinal direction, R is a radius of curvature of the first or second cutting edge, and W is a width of the bridge in the longitudinal direction.

Further, the cutter plate according to the present invention may have a substantially rectangular shape having a curved cross-section, wherein each of the first and second cutting edges may include a top edge and inclined edges extending on both sides of the top edge, and wherein cutting lengths of the first and second cutting edges may be increased by the bridges, respectively.

Furthermore, the first and second cutting edges may further comprise side edges extending to distal ends of the bridge, and wherein the side edges are configured to increase the cutting length of the first and second cutting edges, respectively.

Further, the side edges may be formed in a linear shape or a curved shape.

According to another aspect of the present invention, there is provided a cocoon remover, comprising: a callus removal plate provided with a cutter plate formed with a plurality of micro cutters as shown in one aspect of the present invention; a support frame integrally formed with or removably coupled with the cutter plate; and a main body frame coupled with the support frame, wherein the main body frame includes: a cocoon receiving part formed with a space to collect cut cocoons; and a handle connected at a distal end of the cocoon-receiving portion and configured to be held by a user.

Further, the callus removal plate may be coupled with the body frame by changing its direction in a longitudinal direction to use an unworn cutting edge.

Further, the cocoon remover may be formed with grip portions each protruding from opposite distal ends of the support frame.

Further, the cocoon remover may be provided with a locking rib at the support frame below the grip portion to be coupled with a groove formed at the main body frame.

Further, the handle of the cocoon remover may have a semicircular cross section with one side open, and be formed with a plurality of non-slip walls which protrude outwardly at equal intervals and provide the handle with a cylindrical profile.

Further, a cover is included, the cover being coupled with the body frame and surrounding the callus removal plate to protect the micro-cutter from external impact.

Advantageous effects

In a preferred embodiment of the present invention, there is provided a cocoon-removing plate which neatly and easily performs a cocoon-removing action by a sharpening effect of a cutting edge, thereby remarkably improving the utility of a cocoon-remover, which can be obtained by increasing the cutting length of the cutting edge of a micro-cutter regardless of in which direction the user pushes or pulls the cocoon-remover.

The cocoon-removing plate according to the preferred embodiment of the present invention may be separated from the cocoon remover and replaceably assembled with the cocoon remover such that once the cutting edge oriented in one direction is worn due to one-way use of the cocoon remover, the cocoon-removing plate may be assembled to the cocoon remover by changing its longitudinal direction, thereby extending its expected life by using an unworn cutting edge oriented in another direction.

In a preferred embodiment of the present invention, the callus removal plate is formed with a curved outer surface capable of minimizing a contact area with the skin of the user, thereby reducing cutting resistance therebetween. Therefore, the user can easily remove calluses from the skin with less force. Furthermore, by virtue of its curved profile, the callus removal plate or device can be easily applied to any part of the body, even the concave or arcuate portions of the feet, in order to remove the calluses thereon.

Drawings

Other objects and advantages of the present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an exploded perspective view illustrating a cocoon remover having a cover, a cocoon removing plate, and a main body frame according to a preferred embodiment of the present invention;

FIG. 2 is a perspective view illustrating a callus removal plate arranged with a plurality of micro-cutters according to a preferred embodiment of the present invention;

FIG. 3 is a side view of the cocoon removal plate of FIG. 2;

FIG. 4 is an enlarged perspective view of a portion of one of the microcuts shown in FIG. 3;

FIG. 5 is an enlarged plan view of the micro-cutter of FIG. 4;

FIG. 6(a) is a schematic view illustrating a conventional micro-cutter, and FIGS. 6(b) and 6(c) each schematically illustrate one micro-cutter according to a preferred embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating the sharpening effect of a cutting edge according to a preferred embodiment of the present invention;

fig. 8(a) is a schematic view illustrating a variation in cutting length in the working direction of the cutting edge shown in fig. 6(c), and fig. 8(b) and 8(c) illustrate a variation in the sectional shape and the cutting angle in the working direction at both sides of the cutting edge due to the sharpening effect, respectively, according to a preferred embodiment of the present invention;

fig. 9(a) to 9(d) are schematic views respectively showing the effect of the cutting edge shown in fig. 6(c) according to the working direction according to the preferred embodiment of the present invention;

FIG. 10 is a perspective view showing the assembled cocoon remover of FIG. 1, with the cover omitted to show a cocoon-removing plate having a curved cross-section;

fig. 11 is a perspective bottom view illustrating the cocoon remover of fig. 1;

fig. 12 is a perspective view illustrating a cocoon remover according to another preferred embodiment of the present invention to show a cocoon-removing plate having a plane section.

Detailed Description

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. Unless otherwise defined, terms used in the present specification mean the same meanings as terms used by those skilled in the art, and if the terms used herein conflict with general terms, the explanations are subject to the definitions of the present invention.

The invention described herein is intended to describe specific embodiments only and is not intended to limit the invention. It should be noted that the same reference numerals in the specification denote the same components. Fig. 1 is an exploded perspective view illustrating a cocoon remover 1 according to a preferred embodiment of the present invention. As shown in fig. 1, the cocoon remover 1 includes a cocoon removal plate 100, a main body frame 200 assembled by the cocoon removal plate 100, and a cover 300 coupled with the main body frame 200 while surrounding the cocoon removal plate 100 to protect it from an external influence.

As a preferred embodiment of the present invention, the construction and operation of the callus removal plate 100 will be explained below.

Referring to fig. 1 to 5, a callus removal plate 100 according to a preferred embodiment of the present invention includes, as its main components, a cutter plate 10 in which a plurality of micro-cutters 20 are arranged, and a support frame 30 coupled with the cutter plate 10.

The cutter plate 10 has a planar cross-section as shown in fig. 12, or preferably, a curved cross-section having a predetermined radius of curvature as shown in fig. 2 or 10. The cutter plate 10 is formed in a substantially symmetrical configuration: even by changing its assembling direction in its longitudinal direction, it can be attached to or detached from the support frame 30.

Here, the cutter plate 10 is formed of metal (preferably stainless steel) substantially in a rectangular shape having a curved outer surface, and its cross section is in a convex shape with a central portion rising from both side portions. Such a convex shape having a curved outer surface is configured to allow a contact area with the skin surface of the user to be as narrow as possible, which enables concentration of force at the contact area and reduction of cutting resistance therebetween during a callus removal operation by the callus removal plate 100. Therefore, the user can easily remove calluses from the skin with less force.

Referring to fig. 4 and 5, each of the micro-cutters 20 includes: a protruding plate 21, the protruding plate 21 being formed substantially in a planar shape and being separated from the outer surface of the cutter plate 10 by a pair of bridges 22 protruding outward (upward direction in fig. 3);

openings

23 and 24, the

openings

23 and 24 being respectively provided at both sides of the bridge 22 along the periphery of the protruding plate 21 for the cut calluses to pass through; and cutting

edges

25 and 26, the cutting edges 25 and 26 being formed at an acute angle on the periphery of the protruding plate 21 to cut calluses on the skin.

Here, the protruding plate 21 is formed in a substantially elliptical shape and is elevated from the outer surface of the cutter plate 10 by a predetermined height (preferably 0.1mm to 0.5 mm). The elevation height of the protruding plate 21 is defined as a height that determines the thickness of calluses to be cut or removed from the skin, and does not exceed 0.5mm in order to protect the user from injury.

A pair of bridges 22 are used to connect the projecting plate 21 to the cutter plate 10. As shown in fig. 4 and 5, a pair of bridges 22 are oppositely disposed at two positions, preferably, at the central linear portion of the protruding plate 21. The pair of bridges 22 are formed to have a width (W) in consideration of the sizes of the

openings

23 and 24 and the cutting edges 25 and 26, and preferably, the width (W) is narrower than the width of the protruding plate 21.

More specifically, the

openings

23 and 24 formed at both sides of the bridge 22 may be respectively curved along the circumference of the protruding plate 21, and calluses removed by the cutting edges 25 and 26 may pass through the openings.

For convenience of explanation, in fig. 4 and 5, the opening and the cutting edge located on the left side of the bridge 22 are referred to as a first opening 23 and a first cutting edge 25, respectively, and the opening and the cutting edge located on the right side of the bridge 22 are referred to as a second opening 24 and a second cutting edge 26, respectively.

The first cutting edge 25 and the second cutting edge 26 are obliquely formed at an acute angle with respect to the planar upper surface of the projection plate 21 to cut or remove calluses on the skin. Here, the first cutting edge 25 and the second cutting edge 26 are formed along the entire periphery of the protruding plate 21 except for the portions connected by the bridge 22. As shown in fig. 5, the projecting plate 21 has a substantially symmetrical shape in which a first cutting edge 25 and a second cutting edge 26 are respectively provided on both sides of the bridge 22. Therefore, the cocoons cut by the first cutting edge 25 are discharged through the first opening 23, and the cocoons removed by the second cutting edge 26 are discharged through the second opening 24.

Referring again to fig. 5, the first cutting edge 25 may include any one or more combinations of a top edge 25a formed at the apex of the semicircular shape, side edges 25b formed in a curved shape on both sides of the top edge 25a, and a bottom edge 25c extending from the distal end of the side edge 25b to the distal end of the corresponding bridge 22. In the same manner, the second cutting edge 26 may include any one or more combination of a top edge 26a formed at the apex of the semicircular shape, side edges 26b formed at both sides of the top edge 26a in a curved shape, and a bottom edge 26c extending from the distal end of the side edge 26b to the corresponding bridge 22.

The

bottom edges

25c and 26c may have the same length or different lengths and may be formed in a linear shape or a curved shape according to design requirements.

The micro-cutter 20 having the above-described first and second cutting edges 25 and 26 is arranged in plural on the curved outer surface of the cutter plate 10 in the horizontal and vertical directions, respectively. The arrangement of the micro-cutters 20 may be implemented in rows, parallel to each other, as shown in fig. 1. However, as another embodiment, a plurality of the micro-cutters 20 may be arranged on the cutter plate 10 in a zigzag (zig-zag) manner with each other.

The construction features and operational effects of the micro-cutter 20 according to the preferred embodiment of the present invention will be described with reference to fig. 6(a) to 6(c) and compared with the prior art.

Fig. 6(a) shows a prior art micro-cutter, for example, a micro-cutter disclosed in korean patent registration No. 10-1184144 (the' 144 patent), a protruding plate of which is formed in a circular shape having a flat surface. Assuming that the distance between the opposing apexes (i.e., the distance between the opposing top edges) is Ha, and the radius of curvature of the top edges (i.e., the radius of curvature of the semicircular projecting plate measured from the distal end of the bridge) is Ra, and the radius of the semicircular projecting plate measured from the center line of the bridge is R, the conditional expression Ha ≦ 2Ra + W is satisfied, where W is the width of the bridge in the longitudinal direction. Here, it can be understood that the diameter S of the micro-cutter is equal to 2 Ra. In other words, the micro-cutter according to the' 144 patent has a shape that: so that the distance Ha between the opposite top edges is equal to or smaller than the diameter of a circle having a radius R from the center line of the bridge to one of the top edges.

In contrast, the micro-cutter 20 according to the present invention satisfies the conditional expression of H ≧ 2R + W, where H is the distance in the longitudinal direction between the

top edges

25a and 26a of the first cutting edge 25 and the second cutting edge 26, R is the radius of curvature of the first cutting edge 25 or the second cutting edge 26 from the distal end of the bridge 22, and W is the width of the bridge 22 in the longitudinal direction.

Referring to fig. 6(b), there is a schematic plan view of a micro-cutter according to a preferred embodiment of the present invention. The first cutting edge 25 or the second cutting edge 26 is formed in a semicircular shape having a radius of curvature Rb measured from the distal end of the bridge 22 having the width W in the longitudinal direction. A distance Hb in the longitudinal direction between each of the

top edges

25a and 26a of the first cutting edge 25 and the second cutting edge 26 satisfies the conditional expression of Hb — 2Rb + W. Here, the radius of curvature Rb of the micro-cutter in fig. 6(b) is greater than the radius of curvature Ra of the micro-cutter in fig. 6(a), thereby improving the sharpening effect of the first and second cutting edges.

FIG. 6(c) shows a schematic plan view of a micro-cutter according to another embodiment of the present invention. As shown in fig. 6(c), the first cutting edge 25 or the second cutting edge 26 is formed in a semicircular shape having a radius of curvature Rc measured from the distal end of the bridge 22. Here, each of the first cutting edge 25 and the second cutting edge 26 has a

top edge

25a or 26a, side edges 25b or 26b formed in a curved shape on both sides of the

top edge

25a or 26a, and a

bottom edge

25c or 26c having a length L additionally extending from a distal end of the side edges 25b or 26b to a distal end of the corresponding bridge 22. Thus, since each of the first and second cutting edges 25 and 26 has a substantially semicircular shape, wherein the distance Hc in the longitudinal direction between the opposing

top edges

25a and 26a should be taken into account by increasing the width W of the bridge and the length of the

bottom edges

25c and 26c in the longitudinal direction. Therefore, the first cutting edge 25 and the second cutting edge 26 in FIG. 6(c) satisfy the conditional expression of Hc ≧ 2Rc + W. Here, even if the radius of curvature Rc of the micro-cutter in fig. 6(c) is the same as the radius of curvature Rb of the micro-cutter in fig. 6(b), since the cutting edges are lengthened by increasing the length L of the

bottom edges

25c and 26c, the sharpening effect of the first cutting edge 25 and the second cutting edge 26 will be significantly enhanced.

In other words, it should be noted that each of the first cutting edge 25 and the second cutting edge 26 of the conventional micro-cutter in fig. 6(b) is formed in a semicircular shape having only a

top edge

25a or 26a and a

side edge

25b or 26b of the micro-cutter, without a

bottom edge

25c or 26c as shown in fig. 6 (c).

Here, the sharpening effect is defined as an effect obtained when a force is applied to the cutting edge in an oblique direction by pulling or pushing the cutting edge while pressing, and when a force is applied in a vertical direction while pressing, a cutting action is easily performed with a small force by applying an acute angle smaller than an initial angle of the cutting edge. Such a sharpening effect will be explained in detail in fig. 7.

Fig. 7 is a partial side view of a general kitchen knife having upper and lower portions UP and LP formed with cutting edges. The shaded area shown in fig. 7(a) shows a cross section of the knife in which the cutting edge has a cutting angle θ 1 and a thickness t1, and three points A, B and C are marked, respectively. Fig. 7(a) shows a state in which a force P is applied in the vertical direction while pressing, and a cutting operation is performed by a knife having a cutting angle θ 1.

Starting from the state of fig. 7(a), when the knife is pulled to the right by a distance D, each of the three points A, B and C moves to new positions a ', B ', and C ' by the same distance D. Here, it can be understood that the gap between the three points is not changed. However, due to the displacement distance D, the cutting angle θ 1 formed by the three points A, B and C becomes an effective cutting angle θ 2 formed by the three points a ', B ', and C ', where θ 2 is much smaller than θ 1. Therefore, when the knife is pulled or pushed a certain distance, the phenomenon that the effective cutting angle formed at the distal end of the cutting edge becomes very small or sharp due to the displacement of the knife is referred to as "sharpening effect" in the present invention.

Hereinafter, the sharpening effect of the micro-cutter according to the preferred embodiment of the present invention will be further described with reference to fig. 8.

Fig. 8(a) shows the protruding plate 21 of one of the microcuts 20 shown in fig. 5 or 6 (c). The projecting plate 21 is formed with a first cutting edge 25 and a second cutting edge 26 in a substantially symmetrical shape with respect to the bridge 22 having the width W. For simplicity, only the first cutting edge 25 will be described, where Rc is the radius of curvature of the top edge 25a, Hc denotes the distance between the opposing

top edges

25a and 26a in the longitudinal (vertical) direction, and S denotes the distance between the opposing bottom edges 25c of the first cutting edge 25 in the horizontal direction. Each of the first cutting edge 25 and the second cutting edge 26 is formed to have the same cutting angle along the periphery thereof at the distal end except for portions connected by the bridge 22. From the reference point (first) at the center point of the top edge 25a, at regular intervals, points (second), (third), (fourth) and (fifth) are respectively allocated to the left, and points (second), (third), (fourth) and (fifth) are respectively allocated to the right.

When the working direction of the callus removal work is set to the longitudinal direction of the micro-cutter, it is assumed in fig. 8 that the callus removal plate having the micro-cutter moves upward by being pushed to cut the cocoons. As shown in fig. 8(b) and (c), the cross-sectional shape of the cutting edge at each point will be schematically depicted, which will be used to perform a cutting action on calluses on the skin. In other words, the farther the point is from the position of the reference point (r) to the left or right, the sharper the effective cutting angle gradually becomes. Therefore, at points (v) and (v'), the first cutting edge 25 may have the sharpest edge with the smallest effective cutting angle at the distal end thereof and perform a cutting action with a better sharpening effect enhanced by pulling or pushing the callus removal plate.

Accordingly, the cutting edge may be configured to perform a cutting action at different cutting angles according to the position of the point, and further, each such cutting angle becomes sharper by a sharpening effect by pulling or pushing the callus removal plate when pressed. In this sense, the user can easily and neatly remove calluses on the skin with a small force by using the calluses removing plate used with the plurality of micro-cutters according to the present invention as described above.

Referring to fig. 9(a) to 9(d), the effect of the cutting edge having the micro-cutter 20 shown in fig. 8, which can be changed according to the working direction of the cutting edge when pulled or pushed by a user, will be described.

Fig. 9(a) shows a case when the user pushes the callus removal plate 100, in which the working direction of the micro-cutter 20 is directed upward in the drawing. Here, the top edge 25a of the first cutting edge 25 becomes a primary edge that performs a primary (primary) cutting action, and each of the side edges 25b on the right and left sides serves as a secondary edge that performs a secondary (secondary) cutting action.

Fig. 9(b) illustrates a case when the user pushes the callus removal plate 100 at an oblique angle, in which the working direction of the micro-cutter 20 is directed to the upper right in the drawing. At this time, the top edge 25a and the side edge 25b on the right side each become a main edge that performs a main cutting action, and the top edge 25a and the side edge 25b on the left side each serve as a sub-edge that performs an auxiliary cutting action.

Fig. 9(c) depicts a case when the user pushes the callus removal plate 100 obliquely, in which the working direction of the micro-cutter 20 is directed to the upper left in the drawing. Here, the top edge 25a and the side edge 25b on the left side each become a main edge that performs a main cutting action, and the top edge 25a and the side edge 25b on the right side serve as a sub-edge that performs an auxiliary cutting action.

Fig. 9(d) shows a case when the user pushes the callus removal plate 100 in the left or right direction, in which the working direction of the micro-cutter 20 is horizontal in the drawing. Here, each of the two bottom edges 25c of the first cutting edge 25 becomes a main edge that performs a main cutting action, and the top edge 25a serves as a sub-edge that performs an auxiliary cutting action.

Therefore, it should be noted that when the user operates the callus removal plate 100, the top edge 25a, the side edge 25b, and the bottom edge 25c of the first cutting edge 25 may change their roles as a combination of a primary edge to perform a primary cutting action and/or a secondary edge to perform a secondary cutting action, depending on the working direction of the micro-cutter 20.

The same description may be made for the roles of the top edge 26a, the side edges 26b, and the bottom edge 26c of the second cutting edge 26, and these descriptions will be omitted in order to avoid redundancy.

At the same time, it should be understood that in each of fig. 9(a) to 9(d), the primary edge for the primary cutting action may wear and become dull rapidly over time, while the secondary edge may wear slowly or still maintain good cutting ability. If there is a method of using the unworn secondary blade, for example, changing the coupling direction of the cocoon removing plate and the cocoon remover so as to use the secondary blade, the life span of the cocoon remover can be extended.

As another embodiment of the present invention, the construction and operation of the cocoon remover 1 will be explained in detail below.

As shown in fig. 1, the cocoon remover 1 includes a cocoon removal plate 100 having a plurality of micro-cutters 20 arranged on a cutter plate 10, a support frame 30 coupled with the cutter plate 10, a main body frame 200 assembled from the cocoon removal plate 100, and a cover 300 surrounding the cocoon removal plate 100.

The support frame 30 may be coupled to the periphery of the cutter plate 10 to fix the cutter plate 10. The support frame 30 may be integrally formed with the cutter plate 10 in an insert injection molding manner, or manufactured separately from the cutter plate 10 and detachably coupled. As shown in fig. 10, the cutter plate 10 may have a curved cross section and be configured to be assembled with the main body frame 200 of the cocoon remover 1.

Referring back to fig. 2 to 3, the support frame 30 includes an edge portion 31 surrounding the entire periphery of the cutter plate 10 and a wall portion 32 extending downward from the edge portion 31 and press-fitted with the main body frame 200 of the cocoon remover 1. The wall portion 32 is formed in a stepped shape so as to recede inward (retreatedly) from the bottom surface of the edge portion 31. The wall portion 32 may extend to a predetermined length so as to be firmly coupled with the body frame 200, and preferably at least one press-fitting boss 33 is formed on an outer surface thereof so as to improve a coupling force with the body frame 200.

Further, the support frame 30 may be provided with a pair of grips 34, each grip 34 preferably protruding in the longitudinal direction at opposite distal ends of the support frame 30. The grip portion 34 may be formed as a protrusion having a semicircular cross section, as shown in fig. 1 and 10, which may help a user to easily grip when decoupling the support frame 30 from the main body frame 200.

In addition, as shown in fig. 1 and 2, a pair of locking ribs 35 may be formed to increase a coupling force with the main body frame 200. Preferably, each locking rib 35 is provided at opposite distal ends of the support frame 30 in the longitudinal direction. The locking rib 35 is located below the grip portion 34 and on the same plane as the wall portion 32. Here, each locking rib 35 may be formed to have elasticity to be cantilevered and coupled to one of a pair of grooves 36 in a snap-fit manner, the pair of grooves 36 being concavely and oppositely formed at an inner surface of the main body frame 200.

Here, the cocoon removal plate 100 may be separated from the main body frame 200 of the cocoon remover 1 and replaceably assembled with the main body frame 200 of the cocoon remover 1. Once any one of first cutting edge 25 and second cutting edge 26, for example, first cutting edge 25 oriented in the working direction, is worn due to the user's habitual one-way use, cocoon removal plate 100 can be assembled to cocoon remover 1 by changing its longitudinal direction. Thus, the second cutting edge 26, which is oriented in the opposite direction and is less or not worn, may be used for the cutting action, which results in an extended life expectancy of the cocoon remover 1.

The body frame 200 may be detachably assembled with the support frame 30 to which the callus removal plate 100 is coupled. More specifically, the main body frame 200 includes a cocoon-receiving portion 210 that collects calluses cut off from the skin, and a handle 220 connected to a distal end of the cocoon-receiving portion 210.

Referring to fig. 1, the cocoon-receiving portion 210 is formed with an opening, preferably substantially rectangular in shape, at an upper side, into which the periphery of the support frame 30 is press-fitted. The callus-receiving portion 210 forms a space on the lower side, in which calluses removed from the skin are accumulated and then discarded by the user.

The handle 220 is formed with a grip groove 211 at a position corresponding to the grip portion 34 protruding from the support frame 30. When the support frame 30 is assembled to the main body frame 200, the grip 34 is coupled at the grip groove 211.

Here, in general, the handle 220 needs to be manufactured in a geometry that is easy to grasp, in a lightweight structure, and in a material that leaves less problems in injection or cooling work caused by a thickened portion.

As shown in fig. 10 and 11, the handle 220 of the cocoon remover 1 may have a semicircular cross section with one side open and have a curved outer surface to facilitate grasping. The handle 220 may be formed with one or more anti-slip walls 221 in an inner space thereof for preventing slipping when the user holds the cocoon remover 1. As shown in fig. 11, the distal end of the non-slip wall 221 may have a bent portion 221a, the bent portion 221a protruding outward in a substantially semicircular shape from an imaginary surface formed by the opposite bottom edges 220a of the handle 220.

In the case where a plurality of anti-slip walls 221 are required at the handle 220 to enhance strength, each anti-slip wall 221 may be equidistantly arranged with a space into which the user's finger is not inserted or caught. Since the overall profile of the handle 220 added by the curved outer surface of the non-slip wall 221 may be a substantially cylindrical shape having a smoothly curved profile, an easy grip is provided to a user.

As shown in fig. 1, the cover 300 may be detachably assembled with the callus removal plate 100 or the main body frame 200. The cover 300 may surround the callus removal plate 100 to allow the micro cutter 20 not to be exposed to the outside, thereby protecting the cutting edge of the micro cutter 20 from damage caused by collision with an external object.

In the present invention, the user may hold the handle 200 of the cocoon remover 1 and bring the cocoon-removing plate 100 into contact with the skin. By pulling or pushing callus removal plate 100 against the calluses on the skin, the calluses are cut or removed from the skin by the cutting edge. For example, when the user uses the cocoon remover 1 in which the first cutting edge 25 faces upward as the working direction as shown in fig. 9(a), the cocoons are cut by the first cutting edge 25 by pushing the cocoon removing plate 100, and the cocoons are cut by the second cutting edge 26 by pulling the cocoon removing plate 100.

According to an embodiment of the present invention, each of the first cutting edge 25 and the second cutting edge 26 has a

top edge

25a or 26a, a

side edge

25b or 26b, and a

bottom edge

25c or 26 c. Any one of the

top edge

25a or 26a, the

side edge

25b or 26b, and the

bottom edge

25c or 26c may be the main edge that performs the main cutting action, according to the user's choice or habit. Therefore, it can be understood that the cutting or removing action of the cocoons can be easily performed in any direction of the cocoon remover 1, thereby improving the efficiency of the cutting action.

Meanwhile, according to the embodiment of the present invention, the callus remover 1 having various elements of different shapes can be manufactured in a general injection molding process only by using the upper and lower molds without applying the sliding mold used in the conventional art.

For example, as shown in fig. 12, in addition to a cocoon-removing plate 100A having a planar cross section (i.e., having a cutter plate 10A provided with a flat outer surface), a cocoon-removing plate 1A may be assembled with a cocoon-removing plate 100A having all the same components as those shown in fig. 1 to 10.

Another embodiment of the present invention may be made by arranging the micro-cutter 20 on the cutter plate 10. The plurality of micro-cutters 20 may be arranged on the cutter plate 10 in a zigzag pattern with respect to each other, wherein adjacent rows of micro-cutters 20 are arranged in a staggered manner. In this sense, cocoons that have not been cut by a preceding micro-cutter may be removed by a subsequent micro-cutter, which provides continuity in the work of removing cocoons. Therefore, it is possible to remove a large number of calluses in a single cutting action, and shorten the time to remove calluses from the skin.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A callus removal plate comprising:

a cutter plate;

a plurality of micro-cutters arranged on the cutter plate to perform a cocoon cutting action,

each of the plurality of micro-cutters includes a protruding plate formed substantially in an elliptical shape and elevated at a predetermined height from an outer surface of the cutter plate;

a pair of bridges for connecting the protruding plate to the cutter plate, and oppositely arranged with respect to a center line of the protruding plate;

a cutting edge formed at a periphery of the protruding plate and having an acute angle to cut calluses on the skin; and

openings formed along the periphery of the protruding plate at both sides of the bridge for calluses removed by the cutting edges to pass through,

wherein the cutting edge includes a first cutting edge and a second cutting edge forming substantially a symmetrical shape with the first cutting edge, and

wherein a shape of the protruding plate satisfies a conditional expression of H ≧ 2R + W, where H is a distance between each crest of the first cutting edge and the second cutting edge in the longitudinal direction, R is a radius of curvature of the first cutting edge or the second cutting edge, and W is a width of the bridge in the longitudinal direction.

2. The cocoon-removal plate of claim 1, wherein the cutter plate is substantially rectangular in shape having a curved cross-section, wherein each of the first and second cutting edges includes a top edge and a sloped edge extending on both sides of the top edge, and wherein cutting lengths of the first and second cutting edges are increased by the bridges, respectively.

3. The cocoon removal plate of claim 1, wherein the first and second cutting edges further comprise side edges extending to distal ends of the bridge, and wherein the side edges are configured to increase a cutting length of the first and second cutting edges, respectively.

4. The cocoon-removal plate of claim 3, wherein the side edges are formed in a linear shape or a curved shape.

5. A cocoon remover, comprising:

the cocoon-removing plate as recited in claim 1;

a support frame integrally formed with or removably coupled with a cutter plate; and

a main body frame coupled with the support frame,

wherein the main body frame includes: a cocoon receiving part formed with a space to collect cut cocoons; and a handle connected at a distal end of the cocoon-receiving portion and configured to be held by a user.

6. The cocoon remover of claim 5, wherein the cocoon removal plate is coupled with the main body frame by changing its direction in a longitudinal direction to use an unworn cutting edge.

7. The cocoon remover of claim 5, wherein the cocoon remover is formed with gripping portions each projecting from an opposite distal end of the support frame.

8. The cocoon remover of claim 5, wherein the cocoon remover is provided at the support frame below a grip portion with a locking rib to be coupled with a groove formed at the main body frame.

9. The cocoon remover of claim 5, wherein the handle of the cocoon remover has a semicircular cross section with one side open, and is formed with a plurality of anti-slip walls that protrude outward at equal intervals and provide the handle with a cylindrical profile.