JPS5935179Y2 - rotary electric razor blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to provide a cutting edge that can be formed within the shaving bed of an outer cutter having a plurality of crests.

Conventionally, many electric razors with rotating inner blades have a single round outer blade shape, and the top part, which is the center of the outer blade that touches the skin most when shaving, has a blade that catches the beard. Without 4, shaving was extremely inefficient.

As an outer cutter that has solved this problem, an outer cutter has been proposed in which a concave portion is formed in the center and an annular protrusion mainly having an arcuate curve is formed surrounding the concave portion.

This outer cutter is designed to have a wide top surface by providing the top of the outer cutter that is closest to the skin radially outward from the center of the outer cutter, which is a drawback of conventional single radius outer cutters. It is a thing.

The octagonal angle formed by the inner cutter that slides against the inner surface of the outer cutter and the hole formed in the outer cutter that captures the whiskers may be located at the top of the outer cutter or radially inward and outward from the top. Because they are the same, the top surface of the outer cutter is wide, and the area in contact with the skin is large, so the whisker introduction efficiency is good, but on the other hand, the resistance applied to the inner cutter is extremely large, so the contact state between the outer cutter and the inner cutter is It made the shave worse, caused the beard to twitch, and made the whole shaving bed look bad.

However, the present invention eliminates the above-mentioned drawbacks and makes it possible to provide a smooth and sharp shave.It has a concave part in the center, and the concave part is surrounded by an arcuate curve. an annular protrusion is formed, a corner part is provided between the annular protrusion and the recessed part, the corner part is configured at a position lower than the top of the annular protrusion; The outer blade has a long hole and a small hole at the top, and the outer blade has a hole for taking the many holes,
The angle between the inner cutter and the inner cutter that slides against the inner surface of the outer cutter is small at the top and gradually increases from the top to the bottom and the center of the outside.

The present invention will be explained below based on one embodiment.

Figure 1 is a stepped view of the main parts around the blade, Figure 2 is a partial view of the outer cutter in Figure 1, and Figure 3 is a partial plan view of the outer blade in Figures 1 and 2 with the inner blade. In each figure, reference numeral 1 represents an outer cutter, which is held and fixed between an outer frame 2 and an inner frame 3, and is housed in a main body case 4.

5 is a motor, and 6 is a joint fixed to the shaft of the motor 5, which guides and rotates the inner cutter support 7.

Reference numeral 8 denotes a thin plate-shaped inner cutter, which is pressed against the inner surface of the outer cutter 1 by a plate-shaped inner cutter spring 9 fixed to the inner cutter support 7.

Now, this outer cutter 1 is constructed as shown in FIG.

A concave portion 1a is provided in the center, and an annular protrusion 1b having an arcuate curve is formed on the outer periphery of the concave portion 1a.

The boundary between the concave portion 1a and the annular protrusion 1b has an angular corner portion 1c (some degree of radius may be added);
lc is configured.

The highest portions of the annular protrusion 1b are the top portions 1d, 1d.

Also, the corner portion 1c. 1c is constructed at a position below the top portions 1d, 1d, and long holes are provided in the corner portions 1c, lc, and small holes (short holes) are provided in the top portions 1d, ld.

The inner cutter 8 slides in pressure contact with the outer cutter 1 as described above, and as shown in FIG. The scissor angle θ is the top part 1
The blades are small in d and 1d to ensure that hairs are removed and cut sharply, and gradually increase in size toward the hem 1e and the center of the outer blade.

As mentioned above, at the top portions 1d and 1d, the outer cutter holes 10B and J
fL, and the holes 101-
is a long hole, and in that case, the small hole is within about one-third of the radius from the top 1d of the outer blade to the bottom 1e, and the small hole is from there on the bottom 1e side. hole 10 from long hole
is gradually becoming longer.

The longest hole is also formed in the corner portion 1c.

In addition, in the small hole range within one third of the above, the scissor angle between d4L and the inner cutter is small (for example, at the top 1d, it is 10 to 25
°) may be constant, or may be small on the outer circumferential side, but the above-mentioned scissor angle gradually increases on the outer circumferential side of the small hole range.

(Hem part 1e"Qj: 20° ~ 400), and top part 1d
More outer blade-centered 11! The angle formed by the inner cutter and the elongated hole extending over the corner portion 1c is also increased toward the center (towards the hem) for better inspection.

Therefore, the hole of the outer cutter is JJL at the top part where it comes into contact with the skin the most, and the scissor angle with the inner cutter is small, so the distance the beard moves during cutting is small, and therefore the beard is cut. It is possible to cut reliably, and in particular it is possible to cut the beard short (usually called deep shaving), resulting in a good final shave.

On the other hand, the hole in the hem of the outer cutter is long and has a large scissor angle, so the hole is less likely to be blocked by the inner cutter, which is effective in capturing and cutting long hair.

In particular, the outer hem part is effective for longitudinal cutting in narrow areas such as under the nose, and since the corner part 1c is provided with a long hole, the corner part 1c is effective for cutting long hair in the flat part 9.

Furthermore, if a rib of 1 g is provided in the concave portion 1a of the outer cutter 1, the strength of the outer cutter 1 will be very high, and the deformation of the outer cutter 1 will be reduced, so that when actually shaving, the pressure on the skin will be reduced. The outer cutter 1 is not deformed by the pressure, and the contact with the inner cutter 8 is improved, so that it contributes more to the shaving bed.

Note that when the rib 1g is formed by making the electroformed mother mold uneven, the rib 1g becomes box-shaped and becomes stronger.

Marks or letters may be inserted using this rib 1g.

As described above, the present invention improves the poor shaving quality of the conventional method, and enables smooth and sharp shaving without pulling the beard.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts around the blade portion, FIG. 2 is a partial view of the outer cutter in FIG. 1, and FIG. 3 is a partial plan view of the outer cutter in FIGS. 1 and 2.

Claims (1)

[Scope of utility model registration request] A part of the corner of the outer cutter is provided with an annular protrusion mainly having an arcuate curve surrounding the central concave part, and a part of the corner is entirely provided at the boundary between the annular protrusion and the central concave part, and the corner part is formed into the annular shape. In the outer blade, which is configured at a position below the top of the protrusion and has a long hole in a part of the corner and a small hole in the top, the hole of the outer blade and the inner surface of the outer blade are pressed and slid. The rotary electric machine is characterized in that the five angles formed by the inner cutter are small at the top of the annular protrusion and become larger as they go from the top to the hem and the center of the outer cutter. razor blade.