JP3502798B2 - Razor replacement blade - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A razor blade having a blade covered with a plastic coating and having its edges exposed at regular intervals has been known. Such a spare blade is disclosed in Japanese Laid-Open Patent Publication No. 9-383.
As disclosed in Japanese Patent Laid-Open No. 57-57, a metal replacement blade is almost entirely covered with a plastic covering portion. This conventional spare blade has a step on the surface of the covering portion near the cutting edge, and the step contacts the lower end surface of the holder when the spare blade is mounted on the holder. Therefore, since the lower end surface of the holder is blocked by the step, the shaved mustache is
And it was effective in preventing it from getting caught in the gap between the spare blade.

[0003]

Although there is a spare blade whose entire surface is covered with a plastic coating as described above, the spare blade razor used by barbers before that is a thin metal plate. A spare blade consisting of only is attached. And, such old blade razors are still used by many barbers. This means that most barbers own the holders of old blade razors.

The above-mentioned spare blade whose entire surface is covered with the plastic covering portion is thicker by the covering portion.
Therefore, even if the replacement blade is attached to the conventional holder, the replacement blade holding portion of the conventional holder is originally configured to match the thin replacement blade. However, the conventional blade replacement part cannot be opened by the thickness of the replacement blade, and the replacement 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 had to be newly purchased.

Therefore, the present invention is based on the above-mentioned Japanese Patent Laid-Open No. 9-383.
To provide a spare blade that exhibits the same effect as a thick spare blade disclosed in Japanese Laid-Open Patent Publication No. 57-57, and that can be attached to a conventional thin spare blade holder without purchasing a new holder. It was devised for the purpose.

[0006]

The structure of claim 1 is a blade
1 and holder 2, replaceable blade 1 is made of thin metal plate
The blade edge portion 3 exposed from the lower end of the holder-2 when the replacement blade 1 is attached to the holder-2 is covered with a plastic covering portion 4 for almost the entire length, and is covered with the covering portion 4.
The surface of the spare blade other than the blade tip part 3 is covered with plastic
Not covered by (4) , but formed on the top surface 14, 14 of the coating
The bottom surface of the holder and the bottom surface of the holder are in close contact with each other.
And a blade razor in which a plurality of windows 6 are formed along the blade edge 5 is the the covering portion 4 in order to expose the blade edge 5 in every predetermined interval. According to the configuration of claim 2, the covering portion 4 joined to the surface of the blade tip portion 3 of the spare blade has the blade tip portion 3.
The structure in which the means for surely preventing it from coming off the surface is interposed between the covering portion 4 and the metal plate is added to the first aspect.

The structure of claim 3 is made of a thin metal plate, and when the replacement blade 1 is attached to the holder-2, the holder-2
The blade edge portion 3 exposed from the lower end of the blade is covered with a plastic coating portion 4 over substantially the entire length, and the replacement blade surface other than the blade tip portion 3 covered with the coating portion 4 is a plastic coating portion (4).
Is not covered with and the lower end surfaces 15, 15 of the holder
Flat surfaces are formed on the upper surfaces 14 and 14 of the covering portion so as to be in close contact with the flat surface of the covering portion 4, and a plurality of windows 6 are formed in the covering portion 4 along the cutting edge 5 to expose the cutting edge 5 at regular intervals. It is a replacement blade for razors.

According to a fourth aspect of the present invention, a plurality of holes 7 are provided side by side along the vicinity of the blade edge portion 3 of the thin metal plate, and the covering portion 4 covers substantially the lower half of the holes 7, and therefore the replacement blade 1 The covering portions 4 on both sides of the above-mentioned structure have a structure in which the elements integrally connected to each other through the holes 7 are limitedly added to the third aspect.
According to a fifth aspect of the present invention, an element in which the remaining portion of the hole portion 7 whose lower half is covered with the covering portion 4 is filled with the same plastic as the covering portion 4 is limitedly added to the fourth aspect. Is.

According to claim 6, the cutting edge portion 3 and the cutting edge 5
An element in which the cross section of the covering portion 4 covering the above-mentioned is substantially an inverted triangle is limitedly added to the first to fifth aspects.

[0010]

The present invention is constructed as described above, and the blade tip 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 plastic over substantially the entire length. The replacement blade surface covered with the portion 4 and above the cutting edge portion 3 is not covered with plastic. Therefore, the portion where the spare blade is attached to the holder is a thin metal plate,
It can be mounted on a conventional holder for mounting the existing thin metal blades. Therefore, the barber does not need to purchase a new holder in order to use the spare blade of the present invention, so that the effect of increasing the demand for the spare blade of the present invention can be exhibited.

As another method for a spare blade formed of a thin metal plate, it is possible to prevent a beard shaved between the holder and the spare blade from being caught during use. Metallic ribs may be provided on both sides of the spare blade in the longitudinal direction so as to abut against the lower end surface of the holder. However, it is technically nearly impossible to produce such. On the other hand, in the present invention, the spare blade can be easily manufactured by forming the plastic covering portion by a method such as injection molding.

According to the second aspect of the present invention, the means for surely preventing the covering portion 4 joined to the surface of the blade edge portion 3 of the spare blade from coming off the surface of the blade edge portion 3 is a cover portion 4 and a metal. It is interposed between the board. In the invention according to claim 4, 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 holes 7. Covers 4 on both sides of the blade 1
Are integrally connected through the hole 7. This allows
Since the covering portion 4 is prevented from moving downward or sideways while sliding with respect to the metal plate, the covering portion 4 is prevented from moving toward the cutting edge portion 3.
It can be reliably prevented from coming off.

The invention according to claim 5 is characterized in that the remaining portion of the hole portion 7 whose lower half is covered with the covering portion 4 is filled with the same plastic as the covering portion 4.
Therefore, a shaving cream or the like does not enter the hole portion 7, and the spare blade can be kept clean.

The invention according to claim 6 is characterized in that the cross-section of the covering portion 4 covering the cutting edge portion 3 and the cutting edge 5 is substantially an inverted triangle. Therefore, the holder surfaces 16 and 1 are inclined so as to become narrower as they go downward.
6 and the covering portion surfaces 17, 17 that are inclined so as to spread as they go upward are smoothly continuous, so that the razor's face can be smoothly hit and the beard can be shaved smoothly. Further, by forming the covering portion 4 into an inverted triangle, a flat surface is formed on the covering portion upper surfaces 14, 14. Since this flat surface and the flat surfaces of the holder lower end surfaces 15 and 15 are in close contact with each other with a certain width, it is possible to reliably prevent the shaved beard from being caught between the spare blade and the holder.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. The holder-2 is a metal clasping part body 8
The holding plate 9 made of metal is fitted to the side portion of the, and the holding plate 9 is hinged so as to be rotatable around the shaft 10. A holder having such a structure has been conventionally known, and is disclosed in, for example, Japanese Utility Model Publication No. 5-40865. As shown in this publication, a leaf spring is interposed between the holding body 8 and the holding plate 9 above the shaft 10, and the elastic force of the leaf spring causes the replaceable blade to move the holding portion. The main body 8 and the attachment plate 9 are pressed and fixed from both sides. However, the leaf spring is not shown in the drawings of the present application. The spare blade can be attached and detached by closing the gap 11 between the attachment body 8 and the attachment plate 9 with the force of the hand.

The spare blade 1 is made of a stainless steel plate, and one round hole is provided between the three elongated holes 12 provided at the slightly upper portion. In addition, 8 below the long holes and round holes.
Two small holes 7 are provided side by side. There is no problem even if these holes and holes are not present, and the number of them is not limited to this.

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

The covering portion 4 covers the lower half of the hole portion 7,
The covering portions 4 on both sides of the spare blade are integrally connected to each other through the hole portion 7. Further, the upper half of the hole 7 is filled with the same plastic as the covering 4, and the surface thereof is formed in the same plane as the surface of the blade. In the method of forming the covering portion 4 on the spare blade, the stainless plate which is the main body of the spare blade is fixed, and the cover portion 4 can be formed easily and in a short time by injection molding of thermoplastics. However, it goes without saying that the formation of the covering portion 4 is not limited to this method. Needless to say, even if a non-slip means is not particularly provided between the metal plate of the spare blade and the covering portion 4, the covering portion 4 can be injection-molded sufficiently for normal use.

As shown in FIG. 4, the cross section of the covering portion 4 is substantially an inverted triangle, and the upper surfaces 14 and 14 of the covering portion are formed into flat surfaces. For this reason, since the holder-lower end surfaces 15 and 15, which are also flat, come into close contact with each other, it is possible to reliably prevent the shaved beard from being caught. In addition, the surfaces 17 and 1 of the covering portion
7 is inclined so that its width becomes wider as it goes upward, and the holder-surface 1 which is inclined like this inclined surface
6 and 16 are smoothly continuous. Therefore, the beard can be smoothly cut.

[Brief description of drawings]

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

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

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

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

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

[Explanation of symbols]

1 spare blade 2 holder 3 Cutting edge part 4 Cover 5 cutting edge 6 windows 7 holes 8 Clamping part body 9 Holding board 10 axes 11 Gap 12 long holes 13 round holes 14 Cover surface 15 Holder-Lower end surface 16 Holder-Surface 17 Cover surface

Claims (6)

(57) [Claims] 1. A replacement blade (1) and a holder (2), the replacement blade (1) being formed of a thin metal plate, the replacement blade (1)
The blade edge portion (3) exposed from the lower end of the holder (2) when the holder is attached to the holder (2) is covered with a plastic coating portion (4) over substantially the entire length, and the coating portion (4). The surface of the spare blade other than the blade tip portion (3) covered with is not covered with the plastic covering portion (4), and the upper surface of the covering portion (1
4), the flat surface formed on (14) and the lower end surface of the holder (1
5) and (15) are in close contact with each other, and a plurality of windows (6) are formed along the cutting edge (5) in the covering portion (4) to expose the cutting edge (5) at regular intervals. Spare blade razor characterized by being formed 2. Means for surely preventing the covering portion (4) joined to the surface of the blade edge portion (3) of the spare blade from coming off the surface of the blade edge portion (3) is a coating portion (4). The razor according to claim 1, wherein the razor is provided between the metal plate and the metal plate. 3. A blade edge portion (3) which is made of a thin metal plate and which is exposed from the lower end of the holder (2) when the replacement blade (1) is mounted on the holder (2) is made of plastic over almost the entire length. Of the holder , the surface of the spare blade other than the cutting edge portion (3) covered with the covering portion (4) of No. 1 is not covered with the plastic covering portion (4), and the lower end surface of the holder.
Flat surfaces are formed on the upper surfaces (14) and (14) of the covering portion so as to be in close contact with the flat surfaces of (15) and (15), and the covering portion (4) is provided to expose the blade edges (5) at regular intervals. Razor blade with a plurality of windows (6) formed along the edge (5) of the blade 4. A plurality of holes (7) are provided side by side along the vicinity of the cutting edge part (3) of a thin metal plate, and the covering part (4) covers substantially the lower half of the holes (7). 4. Therefore, the razor blade according to claim 3, wherein the covering portions (4) on both sides of the blade (1) are integrally connected to each other through the hole 7. 5. A razor according to claim 4, wherein the hole (7) whose lower half is covered with the covering (4) is filled with the same plastic as the covering (4). Spare blade 6. edge portion (3) and the blade edge (5) covering portion covering the (4) to claim 1 in cross-section has a substantially inverted triangle of exchange of claim 5, wherein the blade razor or razor Spare blade