JP2001149673A - Spare blade for razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spare blade whose tip is covered with a plastic cover portion so that its edge is exposed at intervals, with the blade eliminating the fear of shaved beards being caught between a holder and the blade and, although being covered with the plastic cover portion, capable of being attached to a special spare blade holder formed solely of a conventional thin metallic plate. SOLUTION: This spare blade is made of a thin metallic plate and the tip 3 exposed from the lower end of the holder 2 when the spare blade 1 is attached to the holder 2 is covered with the plastic cover portion 4 along approximately its overall length. The surface of the replacement blade other than the tip 3 is not covered with plastics and the cover portion 4 is formed with a plurality of window portions 6 along the edge 5 so as to expose the edge 5 at intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a razor replacement blade mainly used by barbers.

[0002]

2. Description of the Related Art Razor replacement blades have been known in which the cutting edge is covered with a plastic covering portion and the cutting edge is exposed at regular intervals. Such a replacement blade is disclosed in Japanese Patent Application Laid-Open No. 9-383.
As shown in JP-A-57-57, almost the entire surface of a metal spare blade is covered with a plastic covering portion. This conventional blade has a step on the surface of the covering portion near the blade edge, and the step comes into contact with the lower end surface of the holder when the blade is mounted on the holder. Therefore, the lower end surface of the holder is closed by a step, so that the shaved beard cannot be removed from the holder.
And the blade can be prevented from being caught in the gap.

[0003]

As described above, there is a replaceable blade whose entire surface is covered with a plastic covering portion, but a replaceable blade-type razor used by barbers before that is a thin metal plate. It is equipped with a spare blade consisting of only And such old-fashioned replaceable razors are still used by many barbers. This means that most barbers have a traditional bladed razor holder.

[0004] The replacement blade, whose entire surface is covered with a plastic covering portion, is thicker by the thickness of the covering portion.
Therefore, even if the replacement blade is to be mounted on a conventional holder, the replacement blade holding portion of the conventional holder is originally configured to fit a thin replacement blade. However, the conventional blade-holding portion does not open up to the thickness of the blade, and the blade cannot be held. Therefore, in order to use a spare blade whose entire surface is covered with a plastic covering portion, a holder dedicated to the spare blade must be newly purchased.

Accordingly, the present invention relates to the above-mentioned JP-A-9-383.
To provide a replaceable blade which has the same effect as the replaceable blade having a large thickness disclosed in JP-A-57-57, and which can be mounted on a conventional thin replaceable blade holder without purchasing a new holder. It was conceived for the purpose.

[0006]

According to a first aspect of the present invention, there is provided a cutting edge portion which is made of a thin metal plate and which is exposed from the lower end of the holder when the replacement blade is mounted on the holder. Is covered with a plastic covering portion 4 over substantially the entire length, and the spare blade surface other than the cutting edge portion 3 is not covered with plastic, so that the coating portion 4 is exposed to expose the cutting edge 5 at regular intervals. Is characterized in that a plurality of windows 6 are formed along the cutting edge 5.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the coating portion 4 joined to the surface of the cutting edge portion 3 of the spare blade comes off the surface of the cutting edge portion 3. Means for surely preventing this is interposed between the covering portion 4 and the metal plate.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, a plurality of holes 7 are provided side by side along the vicinity of the cutting edge portion 3, and the covering portion 4 is provided. The lower part of the hole 7 is almost covered, and thus the covering parts 4 on both sides of the blade 1 are additionally provided with a structure in which the covering parts 4 cover the hole 7 and are integrally connected.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the remaining portion of the hole 7 whose lower half is covered by the covering portion 4 is substantially equal to the covering portion 4. It is filled with the same plastic. Further, the configuration of the present invention described in claim 5 is characterized in that, in addition to the configuration of the other claims, a configuration in which the cross-section of the coating portion 4 that covers the cutting edge portion 3 and the cutting edge 5 forms an approximately inverted triangle is added. It was done.

[0010]

The present invention is constructed as described above, and the blade edge portion 3 exposed from the lower end of the holder 2 when the spare blade 1 is mounted on the holder 2 is covered with plastic over substantially the entire length. The spare blade surface that is covered by the portion 4 and that is higher than the cutting edge portion 3 is not covered with plastic. Therefore, since the portion where the spare blade is clamped by the holder is a thin metal plate,
It can be mounted on a conventional holder for mounting a pre-existing thin metal blade. For this reason, since the barber does not need to purchase a new holder to use the spare blade of the present invention, the effect of increasing the demand for the spare blade of the present invention can be exhibited.

Another method for preventing a shaved beard from being pinched between a holder and a replaceable blade during use, which is a replaceable blade formed of a thin metal plate, is as follows. A metal rib may be provided in the longitudinal direction on both sides of the spare blade and abut on the lower end surface of the holder. However, it is almost technically almost impossible to produce such. On the other hand, in the present invention, a spare blade can be easily manufactured by forming a plastic covering portion by injection molding or the like.

According to a second aspect of the present invention, a cutting edge portion 3 of a spare blade is provided.
Means for reliably preventing the coating portion 4 bonded to the surface of the cutting edge from coming off the surface of the cutting edge portion 3 is interposed between the coating portion 4 and the metal plate. According to a third aspect of the present invention, in addition to the configuration of the second aspect, a cutting edge portion 3 of a thin metal plate is provided.
A plurality of holes 7 are provided side by side along the vicinity,
Covers almost the lower half of the hole 7 and therefore the blade 1
The coating portions 4 on both sides are integrally connected via the hole portion 7. Therefore, it is possible to prevent the covering portion 4 from moving downward or to the side while sliding on the metal plate.
The coating portion 4 can be reliably prevented from coming off the cutting edge portion 3. Furthermore, the upper end of the covering portion 4 is not required only when the covering portion 4 is joined to the surface of the cutting edge portion 3.
Although there is a possibility of being peeled off from the surface of the metal, there are claims 2 and 3.
In the described invention, such a fear can be surely prevented.

The invention according to claim 4 is characterized in that the remaining portion of the hole 7 whose lower half is almost covered with the covering portion 4 is filled with the same plastic as the covering portion 4. Therefore, a beard shaving cream or the like does not enter the hole 7 and the spare blade can be kept clean.

The invention according to claim 5 is characterized in that the cross section of the coating portion 4 covering the cutting edge portion 3 and the cutting edge 5 forms a substantially inverted triangle. Therefore, the holder surfaces 16 and 16 which are inclined so as to become narrower as going downward.
Then, the covering portion surfaces 17, 17 which are inclined so as to spread upward as they go upward, smoothly continue, so that the razor face can be smoothly hit and the beard can be shaved smoothly.
Also, by forming the covering portion 4 into an inverted triangle, the covering portion upper surface 1
Planes are formed at 4,14. Since this plane and the planes of the lower end surfaces 15 and 15 of the holder are in close contact with a certain width, it is possible to reliably prevent the shaved mustache from being caught between the spare blade and the holder.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. The holder-2 is a metal clamping body 8.
A metal holding plate 9 is fitted to the side of the bracket and hinged so that the holding plate 9 can rotate about a shaft 10. A holder having such a configuration has conventionally existed, and is disclosed, for example, in Japanese Utility Model Publication No. 5-40865. As shown in this publication, a leaf spring is interposed between the holding portion main body 8 and the holding plate 9 above the shaft 10, and the blade is held by the elastic force of the leaf spring. The main body 8 and the holding plate 9 are fixed by being pressed from both sides. However, the leaf spring is not shown in the drawings of the present application. The blade can be attached and detached by closing the gap 11 between the clamping body 8 and the clamping plate 9 by hand.

The replacement blade 1 is formed of a stainless steel plate, and one round hole is provided between three elongated holes 12 provided slightly above. 8 below these long holes and round holes.
Two small holes 7 are provided side by side. These holes and holes may not be present, and the number thereof is not limited to this.

The cutting edge portion 3 exposed from the lower end of the holder 2 when the replacement blade 1 is mounted on the holder 2 is covered with a plastic covering portion 4 over substantially the entire length. The portion of the spare blade 1 other than the portion covered with the covering portion 4 remains a stainless plate. In order to expose the cutting edge 5 at regular intervals, a large number of windows 6 are formed in the covering portion 4 along the cutting edge 5.

The covering part 4 covers the lower half of the hole part 7,
The cover portions 4 on both sides of the spare blade are integrally connected to each other via the hole 7. The upper half of the hole 7 is filled with the same plastic as that of the cover 4, and its surface is formed in a common plane with the surface of the blade. The method of forming the coating portion 4 on the spare blade is such that the stainless steel plate, which is the main body of the spare blade, is fixed, and can be easily and quickly formed by injection molding of a thermoplastic plastic. However, it is a matter of course that the formation of the covering portion 4 is not limited to this method. Needless to say, even if no anti-slip means is provided between the metal plate of the spare blade and the coating portion 4, the coating portion 4 can be sufficiently used for ordinary use only by injection molding.

As shown in FIG. 4, the cross section of the covering portion 4 has a substantially inverted triangle shape, and the covering portion upper surfaces 14, 14 are formed in a plane. For this reason, since it is in close contact with the holder lower end surfaces 15, 15, which are also flat, it is possible to reliably prevent the shaved mustache from being pinched. In addition, the coating part surface 17,1
7 is inclined so that the width increases as going upward, and the holder-surface 1 which is inclined similarly to this inclined surface.
6, 16 are smoothly continuous. Therefore, the beard can be cut smoothly.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a spare blade of the present invention is mounted on a holder.

FIG. 2 is a front view of the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a front view of the present invention before forming a covering portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spare blade 2 Holder 3 Blade edge 4 Covering part 5 Blade edge 6 Window 7 Hole 8 Holding part body 9 Holding plate 10 Axis 11 Gap 12 Long hole 13 Round hole 14 Covering part upper surface 15 Holder lower end surface 16 Holder surface 17 Coating surface

Claims (5)

[Claims] 1. A blade made of a thin metal plate and having a blade 1
The blade edge portion 3 exposed from the lower end of the holder 2 when mounted on the holder 2 is covered with a plastic covering portion 4 over substantially the entire length, and the spare blade surface other than the blade edge portion 3 is not covered with plastic. A plurality of windows 6 are formed in the covering portion 4 along the cutting edge 5 so as to expose the cutting edge 5 at regular intervals. 2. Means for reliably preventing the coating portion 4 joined to the surface of the cutting edge portion 3 of the spare blade from coming off the surface of the cutting edge portion 3 is interposed between the coating portion 4 and the metal plate. The razor replacement blade according to claim 1, wherein 3. A plurality of holes 7 are provided side by side along the vicinity of the cutting edge portion 3 of the thin metal plate, and the covering portion 4 covers substantially the lower half of the hole 7 so that both sides of the blade 1 3. A coating as claimed in claim 2, wherein the coatings are connected together through holes.
Razor replacement blade described 4. A hole 7 whose lower half is substantially covered with a cover 4.
4. A razor blade according to claim 3, wherein the remaining portion of the blade is filled with the same plastic as the covering portion. 5. The razor replacement blade according to claim 1, wherein a cross section of the coating portion covering the blade tip portion and the blade edge forms a substantially inverted triangle.