JPH05317535A - Rotary electric razor - Google Patents

Abstract

PURPOSE:To improve quick shaveability and cutting quality in the rotary electric razor having a cylinderlike rotary inner blade. CONSTITUTION:A pair of rotary inner blade 2 and outer blade 16 are provided by plural sets. In such a way, quick shaving can be executed. In each outer blade 16 and inner blade 2, the upper side end in the rotational direction of the rotary inner blade 2 of the outer blade 16 is fixed, and the lower side end in its rotational direction is connected by a tension spring means 24. In such a way, each outer blade 16 and rotary inner blade 2 can always be brought into contact satisfactorily extending over the whole slide-contact area thereof, and the cutting quality can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric shaver having a cylindrical rotary inner blade, and in particular, a measure for improving sharpness in a rotary electric shaver having a plurality of rotary inner blades.

[0002]

2. Description of the Related Art A rotary electric shaver having a cylindrical rotary inner blade is disclosed, for example, in Japanese Patent Publication No. 40-139.
As disclosed in Japanese Patent No. 57, U.S. Pat. No. 4,031,618 and the like, there are those in which two rotary inner blades are arranged in parallel on the inner surface of the outer blade. According to this, the shaving efficiency can be improved as compared with the case where only one rotary inner blade is provided.

[0003]

However, in this type of rotary electric shaver, the mesh-shaped outer blade is constantly pulled toward the lower side in the inner blade rotation direction by the sliding contact force with the rotary inner blade during use. On the lower side of the rotary inner blade in the rotation direction, the outer blade is liable to be loosened to be convex outward so as to float above the rotary inner blade. When the outer blade is loosened as described above, there is a problem that the adhesion with the rotary inner blade at the location is reduced and the sharpness is reduced.

According to the present invention, in the rotary electric shaver having a plurality of cylindrical rotary inner blades as described above, the outer blades covering the upper peripheral surface of each rotary inner blade are stretched. The purpose of the invention is to improve the sharpness by increasing the adhesion of each outer blade to the rotary inner blade while ensuring quick shaving performance.

[0005]

In the rotary electric shaver of the present invention, as shown in the drawing, a plurality of cylindrical rotary inner blades 2 which rotate around each axis 3 are arranged in parallel and adjacent to each other. , A plurality of arch-shaped outer blades 16 covering the upper part of the peripheral surface of each rotary inner blade 2 from above so as to wrap
In a rotary electric shaver equipped with the outer blade holder 17 through the outer blade holder 17,
One end portion 16a of the inner blade 6 on the upper side in the rotation direction is fixed, and the other end portion 16b on the lower side in the rotation direction is connected by a tension spring means 24.

[0006]

Since a plurality of pairs of rotary inner blades 2 and outer blades 16 are provided, quick shaving is possible.

If one end 16a of each outer blade 16 on the upper side in the inner blade rotation direction is fixed and the other end 16b on the lower side in the rotation direction is connected by a tension spring means 24, the outer blades 16 are separated. Even if slack is about to occur on the lower side in the inner blade rotating direction due to the sliding contact resistance with the rotary inner blade 2, the tension spring means 24
The outer blade 16 is prevented from rising from the rotary inner blade 2 because it is pulled by.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rotary electric shaver according to the present invention will be described with reference to FIGS. In FIG. 1 and FIG. 3, two cylindrical rotary inner blades 2 are provided side by side in parallel with each other on the upper part of the main body case 1. A plurality of spiral cutting blades 4 are provided on the peripheral surface of each rotary inner blade 2.

An inner blade supporting frame 7 having a motor 6 mounted therein is incorporated in the main body case 1, and side frames 7a and 7b of the inner blade supporting frame 7 project from the upper surface of the main body case 1 and the side frames 7a and 7b. The two rotary inner blades 2 are supported between the projecting ends of the shafts 7b so as to be rotatable outwardly about the respective shafts 3. Inner blade support frame 7
Mounted on the top is drive transmission means 9 for transmitting the rotary inner blades 2 so as to rotate outward from each other by driving the motor 6. The drive transmission means 9 is an output gear 10 on the shaft of the motor 6.
And a gear 13 meshing with it, a gear 13 at the end of the shaft 12 of the face gear 11, and a gear train 15 between the gear 13 and the gear 14 on the shaft 3 of each rotary inner blade 2.

Two outer blades 16 curved in an arch shape so as to wrap around the upper peripheral surface of each rotary inner blade 2 are stretched with an outer blade holder 17 composed of a common inner holder 17a and outer holder 17b. It is removably mounted on the top. A large number of small polygonal or circular bristles introducing holes 19 are provided in the sliding contact area of each outer blade 16 with the rotary inner blade 2.

As shown in FIGS. 1 and 3, the rotary inner blade supporting frame 7 has elastically deformable arms 20, and both ends 20a of the arms 20 are supported and fixed to the inner wall of the main body case 1. As a result, the rotary inner blade 2 together with the support frame 7 is allowed to float vertically with respect to the main body case 1 while the outer blade 16 receives the skin pressure, and the sliding contact degree between the outer blade 16 and the rotary inner blade 2 is always maintained. It can always be kept constant.

As shown in FIGS. 1 to 3, each outer blade 16
One end 16a on the upper side of the inner blade rotation direction of the blade is a fixed rod 21 installed between the left and right walls of a plastic inner holder 17a.
To the caulking pin 21a, which is integrally projected from the outer blade 16, and is fixed by caulking and welding. . The tension spring means 24 is not limited to a coil spring or a leaf spring made of metal, but a non-metal spring such as plastic may be used. As the tension spring means 24, the outer blade 16 itself is provided with a bead-shaped elastically bendable portion as shown in FIG. 4A, or a meandering elastically deformable portion as shown in FIG. 4B. It may be integrally formed by providing a part or the like. The spring length and the number of springs can be changed so that the spring force of the tension spring means 24 can be freely adjusted.

In this way, one end 16a of each outer blade 16 on the upper side in the inner blade rotation direction is fixed, and the other end 16b of the outer blade 16 on the lower side in the inner blade rotation direction is pulled by the tension spring means 24. And the outer blades 16 are pulled toward the lower side of the rotary inner blade rotation direction P due to the sliding contact resistance with the rotating rotary inner blade 2, and the outer blades 16 are loosened on the lower side of the rotational direction P. It was possible to suppress the tendency of the occurrence of the above-mentioned tendency to occur easily, and to always improve the adhesion of the outer blade 16 to the rotary inner blade 2 and improve the sharpness.

In the above-mentioned embodiment, the outer blades 16 are integrally formed continuously, and the inner holder 17a is shared.
Alternatively, as shown in FIG. 5, each outer blade 16 may be formed separately from the inner holder 17a, and these outer blades 16 may be mounted side by side on a common outer holder 17b.

Further, in the above embodiment, the two rotary inner blades 2, 2 are arranged with the same diameter and at the same height, and are rotated outward from each other. Therefore, when both outer blades 16 are applied to the skin and the entire razor is moved along the skin so that either one of the outer blades 16 precedes, the cooperation between the one outer blade 16 and the rotary inner blade 2 is increased. Since the whiskers can be shaved at the same time by the working action and the cooperating action of the other outer blade 16 and the rotary inner blade 2,
It can be shaved very quickly. Further, since the rotary inner blade 2 on either side rotates outward, when shaving the outer blade 16 on either side in advance, long hair or curly hair lying in a direction counter to the rotational direction of the rotary inner blade 2 is also It is easy to use because there is no direction for raising hair that you can shave. Even if the beard is the leading blade 1
Even when the shaving is left unsuccessfully in step 6, the outer blade 16 on the trailing side can shave again.

However, the rotational direction, height, or diameter of these rotary inner blades 2 can be arbitrarily changed.
For example, as shown in FIG. 6, the two outer blades 16 and the rotary inner blade 2 may be rotated at the same height in the same direction. Also in this case, the beard can be shaved at the same time by both the outer blades 16 and the rotary inner blade 2, so that the early shaving property is excellent. In addition, by moving the entire razor along the skin so that the outer blade 16 covering the rotary inner blade 2 rotating outwardly precedes, long hair lying in a direction counter to the rotational direction of the rotary inner blade 2 and You can also shave curly hair by raising this.

In FIG. 7, two rotary inner blades 2 are rotated inward at the same height. Even in this case, the effect of early shaving is great. In this case, one of the left and right tension spring means 24 can be shared.

In FIG. 8, two rotary inner blades 2 are rotated at the same height but with different diameters so as to rotate outward from each other. In this case as well, the effect of early shaving and the effect of raising hair are obtained.

In FIG. 9, two rotary inner blades 2 are rotated in the same direction to have different heights. According to this, since the height of one outer blade 16 is set higher than the height of the other outer blade 16, only the outer blade 16 of the higher side is placed on the skin so that the outer blade 16 of the lower side does not get in the way. Since it is possible to shave the whole body case 1 by letting it lie down for a while so that it comes into contact with the body case 1, it is easy to cut the whiskers at a local place such as under the nose with the outer blade 16 at the higher side. Also in this case, both outer blades 16 can be applied to the skin together to shave, so that the shaving property is quick. In this case, the outer blade 16 lower than the skin
It is possible to push the outer cutter blade 16 on the trailing side higher than the outer cutter blade 16 on the trailing side while moving the blades in advance, so that deep shaving is possible.

FIG. 10 shows two rotary inner blades 2
The diameters are changed and the heights are made different from each other, and they are rotated outward from each other. According to this
The outer blade 16 on the small diameter side makes it easier to cut the whiskers at a local site, and also has a hair raising effect, a deep shaving effect, and an early shaving effect.

As a means for transmitting the rotation of the motor 6 to the rotary inner blade 2, a timing belt transmission system can be adopted instead of the gear transmission as in the above embodiment.

In each of the embodiments described above, the adjacent outer blades 1
It is also possible to change the pattern and the opening ratio of the hair introduction holes 19 of No. 6 and to make the rotational speeds of the adjacent rotary inner blades 2 different per minute. Further, three or more rotary inner blades 2 may be arranged in parallel.

[0023]

According to the present invention, a pair of rotary inner blades 2
A plurality of sets of outer blades 16 and outer blades 16 are provided for quick shaving, and the outer blade holders 17 are fixed to the upper edge on the inner blade rotation direction of each outer blade 16 and the lower edge on the lower rotation direction is pulled by the spring means 24. Since the outer blades 16 and the rotary inner blades 2 are always in good contact with each other over the entire sliding contact area, the sharpness can be significantly improved, which is advantageous.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a razor head portion.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a perspective view of a razor head portion with an outer blade removed.

FIG. 4 is a perspective view of one end portion of an outer blade showing another embodiment.

FIG. 5 is an exploded perspective view of an outer blade showing another embodiment.

FIG. 6 is a vertical sectional side view of a razor head portion showing another embodiment.

FIG. 7 is a vertical sectional side view of a razor head portion showing another embodiment.

FIG. 8 is a vertical sectional side view of a razor head portion showing another embodiment.

FIG. 9 is a vertical sectional side view of a razor head portion showing another embodiment.

FIG. 10 is a vertical sectional side view of a razor head portion showing another embodiment.

[Explanation of symbols]

 2 rotary inner blade 3 axis 16 outer blade 24 tension spring means

Claims (1)

[Claims] 1. A plurality of cylindrical rotary inner blades (2) rotating around respective shafts (3) are juxtaposed in parallel with each other, and are arranged above the peripheral surface of each rotary inner blade (2) so as to be rolled up. A plurality of arch-shaped outer blades 16 that cover the outer blade holder 17
In the rotary type electric shaver provided via the above, one end 16a of each outer blade 16 on the upper side in the inner blade rotation direction is fixed to the outer blade holder 17, and the other end 16b on the lower side in the rotation direction is pulled. A rotary electric shaver characterized by being connected by spring means 24.