WO2008065949A1

WO2008065949A1 - Razor blade

Info

Publication number: WO2008065949A1
Application number: PCT/JP2007/072572
Authority: WO
Inventors: Shigetoshi Sakon; Hiroyuki Kameoka; Kenji Narita
Original assignee: Panasonic Electric Works Co., Ltd.
Priority date: 2006-11-27
Filing date: 2007-11-21
Publication date: 2008-06-05
Also published as: JP2008132002A

Abstract

A razor blade in which the surface of a thin plate-shaped blade (2), which has a blade edge (2a) formed at its edge, is moved along a skin surface (20), in a position tilted relative to the skin surface (20). A skin-side surface (2b) of the blade (2) is raised at a position on the base end side of the edge (2a) to form a skin contact section (3). Thus, the simpler structure prevents the razor blade from cutting the skin.

Description

Specification

Force razor blade

Technical field

The present invention relates to a force razor blade.

Background art

Conventionally, a force razor blade that is moved along the skin in a posture in which the surface of a thin plate-like blade portion having a blade edge formed on the edge is inclined with respect to the skin is known.

[0003] In this type of force razor blade, the skin is prevented from being damaged by the blade edge.

A pedestal that holds a force razor blade is provided with a protrusion that relatively retracts the blade edge (Patent Document 1).

[0004] However, providing such a protrusion on the pedestal is difficult in terms of manufacturing effort, and in addition, it is effective for a type of force razor that does not have a pedestal that wraps around the skin near the cutting edge, such as a mesh blade. There was a problem!

[0005] Therefore, an object of the present invention is to obtain a force razor blade capable of suppressing the skin from being damaged by a simpler configuration.

Patent Document 1: Japanese Utility Model Publication No. 4 146789

Disclosure of the invention

[0006] In the present invention, in the force razor blade that is moved along the skin in a posture in which the surface of the thin blade-like blade portion having the edge formed on the edge is inclined with respect to the skin, the blade portion described above The skin contact surface is formed by raising the skin side surface of the skin at a position closer to the base end side than the blade edge.

In the present invention, the skin contact portion may be formed in a curved surface shape.

[0008] In the present invention, a plurality of the blade portions may be provided, and the skin contact portion may be formed on some blade portions of the plurality of blade portions.

[0009] In the present invention, the skin contact portion may be partially formed along the blade edge.

[0010] In the present invention, the raised height of the skin contact portion may be partially varied along the blade edge. [0011] Further, in the present invention, a plurality of thin plate-like blade portions each having a blade edge formed on an edge thereof are provided, and the plurality of blade portions are arranged in a lattice shape, and the plurality of blade portions In a force razor blade that is moved along the skin in a posture in which the surface is inclined with respect to the skin, a plurality of skin contact portions that straddle the blade edge in a direction crossing the blade edge direction are formed on the skin side surface of the blade portion. In addition, a cover in which the plurality of skin contact portions are arranged in a grid is provided, and the lattice points of the blades and the lattice points of the skin contact portions are shifted from each other.

Brief Description of Drawings

[0012] FIG. 1 is a plan view of a force razor blade according to a first embodiment of the present invention.

[FIG. 2] FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged view of part A in FIG.

FIG. 4 is a cross-sectional view of a tip portion of a force razor blade according to a modification of the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of a tip portion of a force razor blade according to another modification of the first embodiment of the present invention, in which (a) is a cross-sectional view of a portion having a high ridge height. (B) is a cross-sectional view of a portion having a low raised height.

[Fig. 6] Fig. 6 is a cross-sectional view of a tip portion of a force razor blade according to still another modification of the first embodiment of the present invention, in which (a) is provided with a skin contact portion. FIG. 4B is a cross-sectional view of a portion where a skin contact portion is provided, and FIG.

FIG. 7 is a plan view of a force razor blade according to a second embodiment of the present invention.

FIG. 8 is a plan view of a force razor blade according to a third embodiment of the present invention, wherein (a) is a razor blade body, (b) is a cover, and (c) is a force razor. It is a figure which shows the state which covered the blade main body.

FIG. 9 is a side view of a force razor provided with a force razor blade in the fourth embodiment of the present invention.

FIG. 10 is a side view of a force razor provided with a force razor blade in a modified example of the fourth embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [0014] (First Embodiment) FIG. 1 is a plan view of a force razor blade according to this embodiment, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is an enlarged view of part A in FIG. FIG.

[0015] In the present embodiment, the force razor blade 1 has a plurality of substantially regular hexagonal small holes la densely arranged with a belt-like cross section lb having a substantially constant width.

[0016] As shown in Fig. 2, this crosspiece lb has a substantially U-shaped cross section, and the edges on both sides in the width direction (that is, the inner edge of the small hole la) lc are sharp edges. Thus, the cutting edge 2a is formed.

In the present embodiment, it is assumed that one blade 2 is formed for each edge lc of the crosspiece lb. That is, the force razor blade 1 having the force in this embodiment has the blade portions 2 by the number of sides of the hexagonal small hole la (six per one small hole la).

[0018] The force razor blade 1 is attached to a holder or the like (not shown), and the holder, the surface Id of the peripheral portion of the force razor blade 1, the top surface of the skin contact portion 3, and the like are shaved objects. In the shaving posture defined by contacting with the skin surface 20 (Fig. 3), the power is driven along the skin surface 20 (in the direction along the paper surface in Fig. 1; in the left and right directions in Figs. 2 and 3), As a result, the hair growing on the skin surface 20 is cut.

[0019] Here, in the above-mentioned shaving posture, the blade portions 2 (skin side surface 2b) formed on both sides in the width direction of the crosspiece lb are both skin surfaces as shown in FIGS. It will extend toward the surface 20 while approaching diagonally. Therefore, if the cutting edge 2a is formed simply by making the tip edge of the blade portion 2 sharp edge without any special measures being taken, the skin surface 20 may be damaged by the cutting edge 2a.

[0020] Therefore, in this embodiment, the skin-side surface 2b of the blade portion 2 is raised at a position that is the base end side (in this embodiment, the center side in the width direction of the cross section lb; right side in Fig. 3) from the blade edge 2a. This provides the skin contact part 3 on the blade part 2 itself, and this allows the blade edge 2a to be pulled into the skin surface 20 from the skin contact part 3 in a shaved position (slightly from the skin surface 20). It is arranged at a separated position. That is, according to the force and the configuration, the probability that the cutting edge 2a directly contacts the skin surface 20 can be reduced, and the skin surface 20 can be prevented from being damaged by the cutting edge 2a. According to the force and the structure, it is possible to obtain the force razor blade 1 having a simpler structure that can prevent the skin from being damaged by the necessity of providing the pedestal with the protrusion. And message Apply force to force razors that do not have a pedestal that wraps around the skin near the cutting edge, such as brush blades.

At this time, as shown in FIG. 3, the skin contact portion 3 is preferably formed in a curved shape. As a result, the catching force and shearing of the force razor blade 1 with the skin surface 20 are suppressed, and the force razor blade 1 moves more smoothly (that is, the skin contact portion 3 slides with the skin surface 20). This is because it becomes possible.

FIG. 4 shows a modification of the present embodiment, and is an enlarged cross-sectional view of the blade edge with the same line of sight as FIG. 3. As shown in FIG. It may be bent slightly toward the side away from the skin surface 20 at the position where the contact part 3 is provided. In this way, it is possible to further reduce the probability of the skin being damaged by the cutting edge 2a.

FIG. 5 shows another modification of the present embodiment, and is an enlarged cross-sectional view of the cutting edge taken along the same line of sight as FIG. (A) and (b) show cross sections at different positions along the cutting edge of one blade part. (A) is Va-Va in FIG. 1, and (b) is in FIG. Vb—Shows a cross section at Vb.

[0024] In this example, at the position (a), the height of the ridge where the radius of curvature Ra of the skin contact portion 3 is small and the height of the protrusion is relatively high (from the cutting edge 2a to the top of the skin contact portion 3). The distance from the blade edge 2a to the top of the skin contact portion 3 is relatively low. tb), that is, Ra <Rb, ta> tb.

[0025] When the skin contact portion 3 is continuously formed along the blade edge 2a of the blade portion 2, the skin contact portion 3 blocks swarf, sebum, agents used during shaving, etc. However, if the raised height of the skin contact portion 3 is partially varied along the cutting edge as in this modification, the raised height is lowered and the portion (in this example, (Part (b)) allows hairs, sebum, agents and the like to flow out, and can be prevented from being blocked by the skin contact portion 3 and staying. Therefore, it becomes easy to keep the blade part 2 clean.

FIG. 6 shows still another modification of the present embodiment, and is an enlarged cross-sectional view of the cutting edge taken along the same line of sight as FIG. (A) and (b) show cross-sections at different positions along the cutting edge for one blade part. (A) is Va-Va in FIG. 1, and (b) is in FIG. The cross section at Vb—Vb is shown. In this example, at the position (a), the skin-side surface 2b is raised and the skin contact portion 3 is formed. At the position 1S (b), the skin contact portion 3 is not formed. In this way, the skin contact portion 3 is partially provided (not partially provided) along the cutting edge 2a, so that the portion where the skin contact portion 3 is not formed (in this example (b) It is possible to discharge hair chips, sebum, agent, etc. from the part), and to prevent the skin contact part 3 from being blocked and staying. Therefore, it becomes easy to keep the blade part 2 clean.

(Second Embodiment) FIG. 7 is a plan view of a force razor blade according to this embodiment. Note that the force and force razor blade 1A according to the present embodiment includes the same components as the force and force razor blade 1 according to the first embodiment. Therefore, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted.

[0029] In the present embodiment, the force and force razor blade 1A includes a crosspiece IbA (painted black in the drawing) including a blade portion 2 provided with a skin contact portion (not shown in FIG. 7), It has a crosspiece lbB (outlined in the figure) provided with a blade 2 that is not provided with a skin contact portion.

That is, in the present embodiment, since the skin contact portion 3 is formed only on a part of the blade portions 2 among the plurality of blade portions 2, the fluff from the blade portion 2 where the skin contact portion 3 is not formed. It is possible to discharge the agent used at the time of shaving, sebum, shaving, etc., and it is possible to prevent the hair contact, the skin contact portion 3 from blocking and accumulating fouling, sebum, agent and the like.

[0031] (Third Embodiment) FIG. 8 is a plan view of a force razor blade with a cover covering the embodiment, as viewed from the side in contact with the skin, wherein (a) is a force razor blade main body, (b) is a cover, and (c) is a view showing a state in which the cover is placed on the force razor blade body. Note that the force and force razor blade 1B according to the present embodiment includes the same components as the force and force razor blade 1 according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

In this embodiment, the force razor blade 1B shown in FIG. 8 (a) is not provided with a skin contact portion, and the resin shown in FIG. 8 (b) is provided on the skin side of the force razor blade 1B. By covering the thin mesh cover 4 made of a material or metal material, the cover 4 is used as a skin contact portion.

Further, as shown in FIG. 8 (b), each crosspiece 4a of the cover 4 forms a substantially triangular lattice, and as shown in FIG. 8 (c), the force The grid point of the blade part 2 (cross section lb) of the razor blade 1B and the grid point of the cross section 4a of the force bar 4 are shifted from each other. In this embodiment, the hippo The four grid points are located approximately at the center of the small hole la of the force razor blade 1B, and the crosspieces 4a are arranged so as to connect the center points of the small holes la adjacent to each other.

[0034] In such a configuration, the crosspiece 4a of the cover 4 functions as a skin contact portion. That is, in FIG.

As shown in (c), the crosspiece 4a straddles the cutting edge 2a on the skin side surface of the cutting edge 2 in a direction intersecting with the extending direction of the cutting edge 2a (in this example, the direction orthogonal). Similar to the first and second embodiments, the crosspiece 4a is arranged at a position where the cutting edge 2a is retracted from the crosspiece 4a with respect to the skin surface (a position slightly spaced from the skin surface). It will be.

That is, according to this embodiment as well, it is possible to reduce the probability that the cutting edge 2a directly contacts the skin surface, and to prevent the skin surface from being damaged by the cutting edge 2a. Further, according to the present embodiment, the cover 4 in which the crosspieces 4a as a plurality of skin contact portions are arranged in a grid pattern on the skin side of the force razor blade 1B in which the plurality of blade sections 2 are arranged in a grid pattern. With a relatively simple configuration that covers the surface, it is possible to obtain a force razor blade 1B that can prevent the skin surface from being damaged.

(Fourth Embodiment) FIG. 9 is a side view of a force razor provided with a force razor blade in this embodiment.

[0037] The force and force razor blade 1C according to the present embodiment is formed in a line shape and is a holder for the safety force razor 10.

(Pedestal part) Built in 10a. A blade portion 2C is formed at the leading edge of the force razor blade 1C, and the blade portion 2C has a skin contact portion 3 similar to that shown in FIGS. 3 and 4 (not shown in FIG. 9). Is formed. That is, the skin side surface 2b of the blade part 2C is raised at a position that is the base end side (right side in FIG. 9) from the blade edge 2a, so that the blade part 2C itself is the same as that shown in FIGS. The skin contact portion 3 is provided, so that the blade edge 2a is placed in a shaved position at a position where the blade edge 2a is drawn into the skin surface 20 from the skin contact portion 3 (a position slightly spaced from the skin surface 20). I try to do it. Therefore, according to this embodiment, the probability that the cutting edge 2a directly contacts the skin surface 20 can be reduced, and the skin surface 20 can be prevented from being damaged by the cutting edge 2a.

[0038] FIG. 10 shows the same skin contact as that shown in FIG. 3 and FIG. 4 even in the force-applying configuration showing the safety force razor 10D in which the force razor blades 1C are provided in two rows in parallel. By providing the contact portion, the same effect can be obtained.

[0039] While the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. Are not limited, and various modifications are possible. For example, in the above-described embodiment, the force small holes exemplified by the mesh-shaped force razor blade provided with the substantially regular hexagonal small holes can be implemented in various shapes such as a circle, a triangle, and a square. is there. In either case, the blade portion is formed with the inner edge of the small hole as a sharp edge, and the skin contact portion is continuously or intermittently along the blade edge at a position slightly proximal to the blade edge. It is formed. In addition, the specifications of the blade portion, blade edge, skin contact portion, etc. can be variously modified.

Industrial applicability

The present invention can be used as a force razor blade for cutting hair on the skin surface.

Claims

The scope of the claims

[1] A force razor blade that is moved along the skin in a posture where the surface of the thin blade-shaped blade portion with the edge formed on the edge is inclined with respect to the skin!

A force razor blade, wherein a skin contact portion is formed by raising a skin side surface of the blade portion at a position closer to a base end side than the blade edge.

[2] The razor blade according to [1], wherein the skin contact portion is formed in a curved surface shape.

[3] comprising a plurality of the blade portions,

The force razor blade according to claim 1 or 2, wherein the skin contact portion is formed on a part of the plurality of blade portions.

[4] The force razor blade according to any one of [1] to [3], wherein the skin contact portion is partially formed along the blade edge.

[5] The force razor blade according to any one of [1] to [4], wherein a protruding height of the skin contact portion is partially different along the cutting edge.

[6] Provided with a plurality of thin plate-like blade portions with edge edges formed on the edges, the plurality of blade portions are subjected to IJ, and the surfaces of the plurality of blade portions are oblique to the skin With a razor blade that is powered along the skin in a posture that becomes! /

Provided on the skin side surface of the blade portion with a plurality of skin contact portions straddling the blade edge in a direction crossing the blade edge direction, and a plurality of skin contact portions arranged in a grid pattern.

The force razor blade, wherein a lattice point of the blade and a lattice point of the skin contact portion are shifted from each other.