JPS602270A - Outer blade of rotary type electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the shape of the outer blade and the arrangement of the sink introduction hole of an electric shaver of the type in which the inner blade rotates.

Electric razors have been long awaited by people from all over the world for many years to be able to cut beards, etc. short, and to be able to capture all types of beards, especially long hair, and to provide a comfortable shaving experience. That's true.

However, conventionally, an outer cutter 1 having a dome shape as shown in FIG. 1 is often used. This type of outer cutter has a large number of pores (short holes) 2 and is thin, so it is possible to shave short hairs. However, with this dome blade, the rotational speed of the inner blade is extremely slow near the center, making it impossible to cut efficiently. For this reason, as shown in Figure 2,
It has been proposed that a recess s1a'i not in contact with the skin α is provided in the center, and annular protrusions 1b, 1b having an arch-shaped cross section are entirely arranged on the outer periphery of the recess s1a'i. The outer cutter of the type shown in Fig. 2 improves cutting performance because only the portion of the inner cutter that has a cutting speed of 1 and the entire length is used for cutting the rag; It has advantages such as being able to shave quickly. However, long hair cannot be captured. That is, even if the elongated hole 3ai is arranged in the central recessed part or the elongated hole is arranged on the outer periphery, it will not be possible to form a gently curved surface like the central elongated hole 3a and the outer circumferential elongated hole 6b in the dome blade in FIG. Since all of the long holes are open, the long hairs cannot be raised and captured.

For this reason, an outer blade like the 3rd ward has been proposed.

In FIG. 6, a concave portion 1b is provided in the center of the single-R spherical outer cutter 1 as shown in FIG. Elongated holes 5af are arranged on the elephant slope of 1b. In this case, corner parts 1c, 1c
This allows the long hair to be raised and captured by the elongated hole 6a. However, since the corner parts IC and IC are located at the top of the outer cutter 1 and are formed into corners to stimulate long hair, the corner parts 1c and '1c are located on the skin (as shown in the figure using alpha rays). ), and moreover, it deeply burrows into the skin, making it extremely uncomfortable and damaging the skin.Furthermore, when trying to cut the beard short, pressing the corner part 1c + 1ck strongly against the skin's beak will further damage the skin. . This point is important when it comes to stimulating long hair.
Compared to the desire to make the corner 1c and 1ci gentler in order to avoid damaging the skin, the outer cutter shown in Figure 3 has contradictory characteristics. It is not possible to satisfy both. 7. The present invention fundamentally improves the conventional drawbacks as described above, makes it possible to cut the hair short without damaging the beak, and makes it possible to cut all the long hair. This is an extremely practical electric shaver that can be used with a part of the corner that has short holes or long holes and a long hole on the interface between the annular convex part mainly composed of an arcuate curve and the central concave part. The top part of the annular convex part is also configured at a lower position, and the part from the top part to a part of the corner is formed to be sloped downward, and a short hole is arranged near the top part, and the inner cutter of the outer cutter The press-contact area extends between the long holes on the inner side of the top portion. Note that the top portion corresponds to the portion located at the top of the outer cutter and most likely to come into contact with the skin.

The present invention will be described in detail below based on the embodiments shown in FIGS. 4 to 8.

Fig. 4 is a sectional view of the main part of the blade section, and Fig. 5 is a sectional view of the main part of the blade section.
6 is a partial plan view of the outer cutter in FIGS. 4 and 5, FIG. 7 is a partial view of the outer cutter in another embodiment,
FIG. 8 is a partial sectional view of the outer cutter. In each figure, 11
An outer cutter is held and fixed between the outer frame 12 and the inner frame 13, and is housed in the main body case 14. The outer frame 12 and the inner frame 13 are made of metal, for example, an aluminum comb, and are screwed in and fixed. Since it protrudes from the neck part 13a with your fingers, you can attach and detach it upwards and downwards. Reference numeral 16 denotes an opening/closing tool that engages with a recess in the inner wall of the inner frame 13, and 17 a coil spring that urges the opening/closing tool 16 outward. 18 is a motor, and 19 is a joint fixed to the shaft of the motor 18, which guides and rotates the inner cutter support 20. Reference numeral 21 denotes a thin plate-shaped inner cutter, which is pressed against the inner surface of the outer cutter 11 by a plate-shaped internal force spring 22VC fixed to the inner cutter support 20.

Several inner cutters 21 are arranged radially.

Now, this outer cutter 11 is constructed as shown in detail in FIG. 5. A concave portion 11a is provided in the center, and an annular protrusion 11b having an arcuate curve is formed on the outer periphery of the concave portion 11a. The boundary between the concave portion 11a and the annular protrusion 11b has angular corners 1Ji1c, 11c. The highest part of the annular protrusion 11b is the top part 11d.
becomes.

In the case of Fig. 5, the annular protrusion 11t) is composed of a large outward arc R1 of the top portion 11d and a small circular arc R2, and is parallel to the outer cutter center axis a (which also coincides with the inner cutter rotational axis). The center of R1+R2 is located on the top line. Here, the taste position of the corner part 11c is located below the top part 11d with a slight step, and there is a depth between the corner part 11c and the bottom part 11e of the concave table μm1a. ? n
It is formed to have. And part of the corner
1 c is provided with a long hole 23a, and corner s11 c
A large number of short holes 24 are provided in the evening direction. In FIG. 5, a large number of short holes 24 are provided near the top 11 (l), which contributes to cutting the beard short.

In addition to short holes and square shapes, any shape such as round or hexagonal shapes is acceptable. On the other hand, on the outer periphery of the outer cutter 11, a square portion 11f is formed with a long hole 23.
It is provided with bi and is useful for cutting long hair in narrow areas such as under the nose. An inner cutter 21 (indicated by a two-dot chain line) is in sliding contact with the lower part of the outer cutter 11, and its inner and outer ends are formed in elongated holes 23a and 23b.
located within.

That is, on the inner edge side of the inner cutter, the inner cutter pressure contact range with the outer cutter as shown in Fig. 5? It extends from the top part 11'd of the outer blade to the inner elongated hole 23a, and can reliably cut all the long hair and beard that have entered the length 125a.

A plan view of the main part of FIG. 5 is shown in FIG. 6. In Figure 6,
The outer end of the elongated hole 23a is located closer to the center than the top portion 11d, but is offset from the concentric circle, and the hole has a jagged shape.

The short holes 24 have the same size from the vicinity of the top portion 11d to the short hole 24a at the middle position 14 of the i-shaped convex portion 11b, but as they reach the outer periphery from there, they gradually become larger and at 24b, the outer circumferential elongated hole 25b. The dimensions are almost the same.

In addition, the corner part 11c in the present invention may be sharpened to create a beard, and the angle formed between the 9-sided rising wall and the upper surface arcuate part leading to the recessed part 11a may also be an obtuse angle, a right angle, or an acute angle. But that's fine. If the angle is acute, the upright wall becomes a reverse taper, which further improves the raising of long hair. Also, inner blade 21
When the side of the bar is brought into sliding contact with the above-mentioned raised wall, the long hair and beard that have entered the long hole (short hole is also acceptable) provided in the wall can be quickly captured.

In this case, every other inner cutter may be brought into close contact with the above-mentioned wall, and each inner cutter in the middle has its outer part raised up on the outer periphery just below the outer corner part 11f of the outer cutter 11 in FIG. 9. It may be brought into sliding contact with the wall.

In Fig. 5, the diameter Dc of the corner part 11c is approximately φ5 to 20 (preferably φ6 to 10) in order to secure a space for inviting the long hair, and the diameter Dc of the corner part 11c is approximately φ5 to 20 (preferably φ6 to 10). Diameter □Da is φ5~22 wn
(preferably φ8 to 14 mm), and the diameter Df of the corner portion 11f is φ20 to 40 mm in order to ensure the total area for shaving.
It was bleached (preferably φ28 to 64 mm). skin 1it'r
In view of the supporting relationship, the distance between the top portion 1.1a and the corner portion 11c is set to 0.3 to 5 mm (preferably 0.5 to 3 mm).

Also, the level difference between the top portion 11d and the corner portion 11C is 0~
3 throats (preferably 0.1 to 1 writhing), and the depth m is 0.5 to 5 mm (preferably 1 to 2
theory).

Further, R1 was set to R10 to 100, and R2 was set to R8 to 90.

Further, the thickness of the outer cutter 11 is thinner near the top portion 11cl (
60 to 130 μ), and thick (70 to 140 μ) at the intermediate position between the top portion 11 (l and the corner portion 11f) (may be changed by 1 iF linearly. The thickness change is 2
~50μ, preferably 5 to 20μ) and ] Top of page 1
With 1d, the beard can be shaved short (close shave), and because the outer circumference is thick, the entire outer cutter 11 is difficult to bend downward, and an outer cutter that is strong against external pressure can be obtained. If the outer cutter is gradually made thinner from the outer end to the top portion 11d, the curve of the outer cutter will have uniform stress and the strongest outer cutter will be obtained.

On the other hand, if only the top portion 11d is made thicker, the strength of the portion closest to t*rfsl is improved.

Further, if thicker portions k fjE are provided in the circumferential direction, a close shave can be achieved in the thinner portions, and a sharper Mi of the chisel blade can be achieved in the thicker portions. It is particularly effective to provide a thick portion and a thin portion near the top portion 11d.

In addition, if the thick and thin parts are made to have a concave and convex shape by applying pressure and elongation to each other near the top 11d, the skin will be wrinkled p y'>: OJ k@
This allows you to get a closer shave. Furthermore, if the corner part 11c is made uneven on the circumference by +1μ, the long hair will be raised better.

In addition, the thickness of the outer cutter may be adjusted according to the characteristic that in the electroforming method, widening the width of the bone part that determines the hole shape makes it thinner, and narrowing the width makes it thicker. You can also use a custom-made one that gets thicker the closer it is to the board.

As an example of the electroforming method, on a flat plate, a commonly used 7-1 model insulating material (resist) is applied to the parts corresponding to the short A L and long A 1, and then #shitoroe is applied. Figures 5 and 7
Form the inner surface of the outer blade as shown in the figure, and then perform the next electrodeposition process.
Electroformed mother mold, then secondary electrodeposition, then secondary core deposition
I can be peeled off to obtain an outer cutter.

Further, the method for manufacturing the outer cutter may be a press method.

As the material of the outer cutter 11, Ni or N1 alloy (co-gold-containing cemented carbide) is used.

If a pore is provided in the bottom part 11e of the central recessed part 11a, the stress of the outer cutter 11 will be absorbed and the strength will be improved. However, as shown in FIG. good. Further, the cross section of the outer cutter 11 is as shown in No. 8M, with four portions 111 provided on the inner surface of the bone portion 1)h.

FIG. 7 shows another embodiment, which is almost the same as FIG. 5, but
The different parts are that the annular protrusion 11''o is arcuate &! It is formed by a single R3. It is bad if it is formed thickly.

Note that the shape of the annular protrusion 11b is not limited to the circular arc curve, but may be a quadratic, cubic, etc. curve such as a parabola or hyperbola, and in particular, the shape of the apex 11d The entire straight part may be incorporated so as to form a straight line between the corner part Itc and the corner part Itc.

It goes without saying that the corner portion 11 cvc may be rounded to some extent if it serves to induce long hair.

As described above, the present invention first provides the concave portion 11a (5) in the central portion.
Since the cutting speed of the inner cutter is slow, the skin l shown in Fig. 4 is
Like the i-rays α and β, they come into contact with the skin at a sufficiently fast speed without contacting the skin, resulting in less resistance and a sharp cut. Two areas are in contact with the skin, allowing for quick shaving. Moreover, the protrusions 11b and 11bi
Since it is mainly formed with arcuate curves, the roughness is soft, and it sinks smoothly into the skin, allowing for a close shave.

In addition, since a corner part 11ck having a long hole 23ai is provided at the upper part of the recessed part 11a, even long hair that is curly or curly is raised up by this corner part 11c and captured within the long hair, so that any kind of long hair can be It can also be cut.

In this case, this is possible because the inner cutter press-contact range of the outer cutter extends from the entire top to the inside of the elongated hole. Moreover, the greatest feature of the present invention is that the corner part 11
Since the corner c is located slightly lower than the top 11d, the top 11d hits the skin first and protects the entire skin, and the corner 11c does not press strongly against the skin as shown in Figure 3, which prevents the skin from coming into contact with the skin. It is something that will not hurt @.

The top part 11d has a gentle curve and is almost flat, and is also formed in a circumferential shape, so even if it is strongly pressed against the skin, it will not dig into the skin in extreme parts.
It has a soft touch and has an extremely good texture. Since it is pressed against the skin moderately and has a short hole near the top, deep pricking is also possible. As shown in FIG. 3, since there is no part of the top portion that comes into contact with the skin, the strength near the top portion 11'a is also improved.

Moreover, the top portion 11t1. By forming the corner $11c with a downward slope, the skin smoothly moves to the concave portion 11a 9111 along the slope, so that the skin at the top portion 11d is smoothly pushed out. The hair is removed, the beard is pushed out, and the hair is still in good condition.
This allows for a closer shave.

As described above, the present invention provides the long-awaited long hair cutting, close shaving, and improved texture of the outer blade by specially shaping and forming the top part and part of the inner corner. This was achieved all at once while improving the overall strength, and its practical effects are immeasurable.

[Brief explanation of the drawing]

Figures 1 to 3 show all conventional examples, Figure 1 is an external view, Figures 2 and 3 are sectional views of main parts, and Figures 4 to 8 show all examples of the present invention. , FIG. 4 is an assembled view of the main parts, FIG. 5 is an enlarged partial view of the outer blade, FIG. 6 is a partial plan view of the outer blade, and FIG. Figure 8 is a sectional view of the outer cutter. 1.11...Outer blades 1a, 11a...Central concave portion 1b, 111)...Annular protrusion 1c, IIC...Corner part 11d...・・・・・・Top part 2.24.24
a, 24b = - Short hole 3PA, 3b, 25a, 23b - Long hole or above Applicant Suwa Seiko Co., Ltd. Figure 1 Figure 2 Figure 4 Figure 5 Figure 23 Figure 6

Claims (1)

[Claims] In an outer cutter having a concave part in the center and an annular protrusion mainly having an arcuate curve on the outer periphery, a part of the corner with an elongated hole is provided at the boundary between the annular protrusion and the central concave part, A part of the corner is formed at a lower position with a step with respect to the top part of the outer cutter provided within the top part of the annular projection, and a part from the top part to a part of the shear corner is formed with a downward slope. ,
An outer blade for a rotary electric oven, characterized in that all the short holes are arranged near the top, and the entire pressure contact range of the inner blade in the outer blade extends from the top to the long hole on the inner side.