JPH07308463A - Rotary type electric razor - Google Patents

Abstract

PURPOSE:To easily shave naturally wavy hair without damaging skin and to enable shaving to the quick by forming the outer blade of an outer blade body of an outer circumferential outer blade and an inner circumferential outer blade thinner than the outer circumferential outer blade and forming an inner blade body of outside and inside inner blades and an elastic body for energizing both inner blades inside both outer blade parts. CONSTITUTION:This rotary type electric razor is formed of an outer blade body 14 provided with the outer blades, a motor provided inside a main body while protruding an output axis inside an inner blade body housing chamber, and an inner blade body 10 fitted to the output axis and provided with the inner blades in slidably contact with the inner surfaces of outer blades by being energized with the elastic body. Then, the outer blades of the outer blade body 14 are formed of an outer circumferential outer blade 16a and an inner circumferential outer blade 16b formed with the inside part of the outer circumferential outer blade 16a recessed toward the side of the inner blade body housing chamber and thinner than the outer circumferential outer blade 16a, and the inner blade body 10 is formed of an inner blade stand, outer and inner circumferential inner blades 13a and 13b which are freely movably provided on this inner blade stand and respectively in slidably contact with the inner surfaces of both the outer blades 16a and 16b, and an elastic body for energizing both the blades 13a and 13b onto the inner surfaces of both the outer blade parts.

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, and more particularly to improvement of an outer blade body thereof.

[0002]

2. Description of the Related Art Generally, a rotary electric shaver known in the prior art generally has an inner blade body accommodating chamber whose one end is opened in the main body, and the inner blade body accommodating chamber is closed to form a large number of beard introducing holes. An outer blade body having a groove formed therein is detachably attached, and an output shaft of a motor provided in the main body is made to project from a shaft hole formed in a bottom wall of the inner blade body storage chamber. Then, an inner blade body movably attached to the inner surface of the outer blade of the outer blade body is movably attached to the output shaft, and the inner blade body is rotated by the rotation of the motor. He is supposed to shave.

[0003]

The conventional rotary electric razor described above has a better shave than the reciprocating electric razor, and since the outer blade is thick, it does not damage the skin. It has an excellent surface that is gentle on the skin.

However, unlike a reciprocating electric shaver in which the inner blade reciprocates while supporting the outer blade, the inner blade is urged by a spring provided on the inner blade base so as to be pressed against the inner surface of the outer blade. Because it is movable with respect to the blade stand,
The inner blade is not designed to rotate while supporting the outer blade. Therefore, when the skin is strongly pressed against the outer blade during use, the outer blade is dented and deformed inward, so it is necessary to have rigidity to prevent this deformation, so the material thickness is approximately The thickness is about twice as large as 100 μm and 50 to 60 μm of the reciprocating electric shaver. As a result, it does not damage the skin, but there is a problem that deep shaving cannot be performed like a reciprocating electric shaver.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art, and forms an inner blade body storage chamber formed in the main body and having one end opened, and a large number of beard introducing holes for closing the opening. An outer blade having an outer blade, a motor provided in the main body, the output shaft of which protrudes into the inner blade housing chamber, and the outer blade attached to the output shaft and biased by an elastic body. In a rotary electric shaver consisting of an inner blade body having an inner blade slidably contacting the inner surface of the outer blade of the outer blade body, an outer peripheral outer blade and an inner portion of the outer peripheral outer blade to the inner blade body storage chamber side. It is formed by an inner peripheral outer blade having a material thickness thinner than that of the outer peripheral outer blade while being recessed toward the inner blade body, and the inner blade body is movably provided on the inner blade base and the inner blade base. The outer inner blade and the inner inner blade that slidably contact the inner surface, respectively Was rotary electric shaver structure formed by an elastic body for urging the portion surface.

Further, an inner blade body housing chamber formed in the main body and having one end opened, an outer blade body having an outer blade having a large number of whiskers introducing holes for closing the opening are provided in the main body. A rotary type consisting of a motor having an output shaft projecting into the inner blade housing chamber, and an inner blade having an inner blade that is attached to the output shaft and is urged by an elastic body to make sliding contact with the inner surface of the outer blade. In the electric razor, the outer blade body,
A frame body attached to the main body, an outer peripheral outer blade attached to the frame body and having an opening formed in the center, one end attached to the opening edge of the opening and the other end attached to the inner blade storage chamber. A support body extending to the side and having a locking portion on the one end side and an elastic body receiving portion on the other end side, and forming a large number of whisker introduction holes and the locking portion and the elastic body of the support body. Arranged between the elastic body receiving portion and the support portion, and an inner peripheral outer blade having a supporting portion movably positioned between the receiving portion and the outer peripheral outer blade formed with a material thickness smaller than that of the outer peripheral outer blade. The inner peripheral outer blade is constituted by an elastic body that urges the inner peripheral outer blade toward the opening side, and the inward movement amount of the inner peripheral outer blade portion is pressed by the skin entering from the opening edge during use. The configuration of the rotary electric razor is larger than the amount of movement.

[0007]

As described above, according to the present invention, the outer cutter is formed by bending the outer cutter to the outer cutter and the inner cutter by bending the outer cutter to the inner side of the outer cutter as described above. Since the material thickness is made thinner than the material thickness of the outer peripheral outer blade, the outer peripheral outer blade receives a strong pressing force by the skin against the outer blade body to prevent the outer blade from being deformed, and the inner peripheral outer blade enables deep shaving. In addition, an inner peripheral outer blade urged by a spring is provided in an opening formed inward of the outer peripheral outer blade so that the inner peripheral outer blade can freely move in and out, and the amount of inward movement due to this protruding and retracting is determined by the amount of movement by the pressing of the skin in use. Since it is made large, the deformation of the inner and outer blades can be prevented more reliably.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, the main body 1 of the electric razor is formed with an inner blade body storage chamber 2 which is open at one end side, that is, the upper side in FIG. 1, and a shaft hole 4 is formed in a bottom wall 3 of the inner blade body storage chamber 2.
Is formed, and the output shaft 6 of the motor 5 provided in the main body 1 is projected into the inner blade housing chamber 2 from the shaft hole 4. Reference numeral 7 is a battery for supplying electric power to the motor 5, and 8 is a switch for driving and stopping the motor.

An inner blade 9 is detachably attached to the output shaft 6. And this inner blade 9
Is an inner blade base 10 that has a coupling shaft (not shown) that fits into the output shaft 6 like the conventional one and that has a plurality of through holes 12 formed along the axial direction of the coupling shaft,
A spring (not shown) urges the through hole 12 of the inner cutter base 10 upward in FIG. 1 to correspond to an outer peripheral outer blade and an inner peripheral outer blade of an outer cutter body, which will be described later, respectively.
It is composed of a and an inner peripheral inner blade 13b.

Next, 14 is an outer blade body which is detachably attached to the main body 1 by closing the opening of the inner blade body storage chamber 2. The outer blade body 14 is an outer blade frame 15 and this outer blade. The outer cutter 16 is integrally fixed to the frame 15. The outer blade 16 is located inside the outer peripheral outer blade 16a and the outer peripheral outer blade 16a as shown in the figure, and is formed by bending the outer peripheral outer blade toward the inner blade storage chamber 2 to form a recess. Inner peripheral outer blades 6b are formed. The radii of curvature R1 and R2 of the spherical surfaces of the outer peripheral outer blade 16a and the inner peripheral outer blade 16b are the same as shown in FIG. The outer peripheral outer blade portion 16a and the inner peripheral outer blade portion 16
A large number of beard introducing holes are formed in b.

Further, the material thickness t1 of the outer peripheral outer blade 16a is set to a thickness of about 100 μm, which is the same as the conventional one, so as not to be deformed inward even if a pressing force by the skin is applied during use. On the other hand, the material thickness t2 of the inner peripheral outer blade 16b is set to the same thickness as the outer blade of the conventional reciprocating electric shaver of about 50 to 60 micrometer. Therefore, deep shaving can be performed like the conventional reciprocating electric razor.

Inner peripheral outer blade 16 with respect to outer peripheral outer blade 16a
As shown in FIG. 3, the depth of the depression of b is the outer blade 1 when shaving.
When 6 is pressed against the skin S of the face, the bone B of the face (typically the jaw) shown by the chain double-dashed line is cut through the skin, that is, the skin, and the outer peripheral blade 1
When pressed against the bent portion 16c of the 6a, the skin S located between the bent portions 16c is set to lightly press the inner peripheral outer blade 16b. Therefore, the inner peripheral outer blade 16b is not deformed by the pressing force of the skin S.

According to the research conducted by the inventor, the face (chin)
The radii of curvature of the bones B and the skin S of this portion are about 18 mm and 20 mm on average, respectively, though there are individual differences, and based on this, the outer blade 6 has a shape of the outer peripheral outer blade 16a and the inner peripheral outer periphery. The radius of curvature of the blade 16b is 34 millimeters, the diameter of the outer peripheral blade portion 16a is 33 millimeters,
It has been found that one of the good dimensional relationships is that the diameter of the bent portion of the outer peripheral outer blade 16a is 20 millimeters and the depth of the recess of the inner peripheral outer blade 16b from the outer peripheral outer blade 16a is 4 millimeters. .

The operation of the above embodiment will now be described. The shaving operation is performed in the same manner as the conventional rotary electric razor, but since the outer peripheral outer blade 16a is thick during the shaving operation, it does not damage the skin like the conventional one and is a so-called beard that is kind to the skin. Shaving can be performed, and since the inner peripheral outer blade 16b has a thin material, so-called deep shaving can be performed. Since the outer peripheral outer blade 16a is thick, it is not deformed by the pressing force of the skin in use, and the inner peripheral outer blade 1
6b has a thin material, but the inner peripheral outer blade 16b is in contact with the bent portion 16c of the outer peripheral outer blade 16a by the contact of the bone of the face.
The inner peripheral outer blade 16b
Can be prevented from deformation.

As shown in FIG. 4, the outer cutter body 16 has a bent portion 16c of the outer cutter 16a, that is, an outer cutter 16a.
By forming the curly hair raising hole 16d for raising curly hair over the end surface of the peripheral wall 16e that straddles the outer peripheral outer blade 16 and the inner peripheral outer blade 16b, it is possible to shave the curly hair properly. Since this peculiar hair raising hole 16d is formed in the bent portion 16c, there is an effect that a beard attached to the so-called sleeping skin can be surely and easily raised during shaving.

Next, what is shown in FIG. 5 is intended to more reliably prevent the deformation of the inner peripheral outer blade 16b due to the pressing force of the skin, and the tip of the inner blade 10 is spherical at the center of rotation. When the inner peripheral outer blade 16b receives an unexpected pressing force, the tip of the protrusion 17 supports the inner surface of the inner peripheral outer blade 16b to reliably prevent its deformation. In this case, since the inner blade base 10 is rotating at a high speed, the protrusion 17 may always be in contact with the inner surface of the inner peripheral outer blade 16b such that the tip of the protrusion is in slight contact. However, it is desirable to provide a very small gap so that the inner peripheral outer blade 16b does not always contact, and contacts and supports it when the inner peripheral outer blade 16b starts to deform very slightly.

If the inner blade base 10 is made of a self-lubricating material such as acetal resin, the inner peripheral outer blade 16b and the protrusions 17 will not be worn. Prevention and inner peripheral outer blade 16b and the protrusion 1
7 is effective in preventing power loss or noise generation due to contact friction with 7.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. The same parts as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted unless necessary.

As shown in FIG. 6, an inner blade body 20 is attached to the output shaft 6 of the motor 5 protruding into the inner blade body storage chamber 2 formed in the main body 1. A through hole 12 is formed in the inner blade base 21 as in the above-described embodiment, and an outer peripheral inner blade 13a and an inner peripheral inner blade 13b are inserted into the spring insertion holes 13c and 13d in the through hole 12.
It is movably provided by being biased to the outer blade body side described later by b. An annular groove 23 is formed on the outer peripheral portion of the inner blade base 21.

Reference numeral 24 is an outer blade body, and this outer blade body 24 is a main body 1
The frame 25 is attached to the frame 25 and the outer blade 26 integrally fixed to the frame 25. Further, the outer cutter 26 has an opening 27 formed inside thereof and a large number of whiskers introducing holes provided on the outer periphery of the opening 27.
And an annular fixing portion 28a fixed to the rim portion 27a of the opening 27 is formed at one end, and the other end is formed into the inner blade housing chamber 2
The cylindrical body 28d is extended to the side, and the inner peripheral wall of the cylindrical body 28d is recessed in the outer peripheral direction to form a stepped portion 28b as a locking portion on the lower side of the fixed portion 28a, and an elastic member facing the stepped portion 28b. A large number of whiskers introduction holes are formed by a support body 28 having an annular brim piece 28c as a body support portion formed at the other end and a material thickness of about 50 to 60 micrometer which is thinner than the outer peripheral outer blade 26a. And an inner peripheral outer blade 30 in which an annular support piece 30a as an elastic body receiving portion formed on the outer peripheral edge portion is movably fitted between the step portion 28b of the support body 28 and the annular flange piece 28c, The inner peripheral outer blade 30 is arranged between the annular brim piece 28c and the annular support piece 30a, and the inner peripheral outer blade 30 is attached to the outer blade body 24.
It is composed of a spring 29 that biases to the side.

In the assembly of the inner peripheral outer blade 30, the inner peripheral outer blade 30 is fitted into the tubular body 28d, and then the spring 29 is fitted, and then the annular flange piece 28c is attached to the other end of the tubular body 28d. It is performed by attaching it to the part by a method such as adhesion.

The other end portion of the support body 28, that is, a part of the peripheral wall of the tubular body 28d and the annular flange piece 28c are located in the annular groove 23 of the inner blade base 21, and the inner blade base 21 is It is positioned in the annular groove 23 when rotated. Further, the outer peripheral inner blade 13a and the inner peripheral inner blade 13b rotate while slidingly contacting the outer peripheral outer blade 26a and the inner peripheral outer blade 13b, respectively.

Since the inner peripheral outer blade 30 is pressed by the skin S of the face during actual shaving, the spring 29 is compressed, and the inner peripheral outer blade portion 30 is pressed against the skin as shown in FIG. Although the bone B of the face moves toward the inner blade 20, when the bone B of the face comes into contact with the opening edge 27a of the outer peripheral blade 26a through the skin S, that is, the skin, the movement is blocked by this bone B and the inner peripheral outer blade 30.
Will not move any further. Inner peripheral outer blade 30
When moving, the inner circumference inner blade 13 follows the movement.
b also moves while slidingly rotating on the inner surface of the inner peripheral outer blade 30, and at this time, the beard entering from the beard introducing hole is shaved.

The amount of movement of the inner peripheral outer blade 30 within the support body 28, that is, the amount of movement between the step portion 28b and the annular brim piece 28c is such that the inner peripheral outer blade 30 is at the first position, that is, at the outermost position. From the state of being pressed by the skin of the face and start moving,
It is set to be larger than the amount of movement until the bone B of the face comes into contact with the opening edge 27a and its movement is blocked. Therefore, the face bone B is not pressed by the skin S while the movement of the inner peripheral outer blade 30 is blocked before the face bone B comes into contact with the opening edge 27a. Even when the inner peripheral outer blade 30 is in contact with the inner peripheral outer blade 27a, the inner peripheral outer blade 30 is not prevented from moving and is allowed to move further inward.

Also in the operation of the second embodiment, when shaving as in the above-mentioned embodiment, the outer peripheral outer blade 26a has a large material thickness, so that it can be shave without being deformed and damaging the skin. Further, since the inner peripheral outer blade 30 has a thin material, deep shaving can be performed, and the bone B of the face abuts the opening edge 27a of the outer peripheral outer blade 26a. The inner peripheral outer blade 30 is not deformed together with the fact that the movement of 30 is not blocked and the movement is allowed further inward.

Although the inner and outer blades have a circular shape in the above-mentioned embodiments, they may have a polygonal shape such as a hexagon or an octagon.

Further, although the support 28 in the second embodiment is formed in a tubular shape, it does not necessarily have to be a tubular shape, and the point is to support the spring 29 for urging the inner peripheral outer blade portion 30 toward the opening 27. The shape and the like are arbitrary as long as it has a function to receive, and as long as it has this function. Also in this case, it is desirable that the portion to be attached to the opening edge 27a has a continuous annular shape in order to smooth the contact of the outer blade 26 with the skin S when shaving.

[0029]

As described above, according to the present invention, the material thickness of the outer peripheral outer blade is set to the same thickness as that of the conventional rotary razor, and the material thickness of the inner peripheral outer blade is made thinner than the material thickness of the outer peripheral outer blade. Since it has the same thickness as the conventional reciprocating razor, it is easy to shave the peculiar features of the conventional rotary razor and does not damage the skin, and the characteristic of the conventional reciprocating razor. The effect that deep shaving can be performed can be achieved together, and further, the effect that deformation of the inner peripheral outer blade portion can be prevented can be achieved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rotary electric shaver according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the outer blade body of the above embodiment.

FIG. 3 is a cross-sectional view showing the relationship between the skin and the outer blade body when shaving in the above embodiment.

FIG. 4 is a view showing another embodiment of the outer cutter body in the above embodiment.

FIG. 5 is a view showing another embodiment of preventing deformation of the outer blade body in the above embodiment.

FIG. 6 is a sectional view of a main part of a rotary electric shaver according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing the relationship between the skin and the outer blade body when shaving in the above embodiment.

[Explanation of symbols]

 1 Main Body 2 Inner Blade Storage Chamber 10 Inner Blade 12 Through Hole 13a Outer Edge Inner Blade 13b Inner Edge Inner Blade 14 Outer Blade Body 16 Outer Blade 16a Outer Outer Blade 16b Inner Outer Blade 27 Open 27a Open Edge 28 Support 28b Step Part (locking part) 28c annular brim piece (elastic body receiving part) 29 spring (elastic body) 30 inner peripheral outer blade

Claims (4)

[Claims] 1. An inner blade body storage chamber formed in the main body and having one end opened, an outer blade body having an outer blade having a large number of beard introducing holes for closing the opening, and an outer blade body provided in the main body. A rotary type consisting of a motor having an output shaft projecting into the inner blade housing chamber, and an inner blade having an inner blade that is attached to the output shaft and is urged by an elastic body to make sliding contact with the inner surface of the outer blade. In an electric razor, the outer blade of the outer blade body,
The inner peripheral body is formed with an outer peripheral outer blade and an inner peripheral outer blade having a material thickness smaller than that of the outer peripheral outer blade while immersing the inner peripheral portion of the outer peripheral outer blade in a concave shape toward the inner blade body storage chamber side. , An inner blade base and an outer inner blade and an inner inner blade which are movably provided on the inner blade base and slidably contact the inner surfaces of the outer blades, and the inner blades are urged toward the inner surfaces of the outer blade portions. A rotary electric razor characterized by being formed with an elastic body. 2. The rotary electric shaver according to claim 1, wherein a radius of curvature of the outer peripheral blade of the outer blade body and a radius of curvature of the inner peripheral outer blade are the same. 3. The rotary electric shaver according to claim 1, wherein a protrusion that receives the inner surface of the inner peripheral outer blade is formed at the center of rotation of the inner blade base of the inner blade. 4. An inner blade body storage chamber formed in the main body and having one end opened, an outer blade body having an outer blade having a large number of whiskers introducing holes for closing the opening, and an outer blade body provided in the main body. A rotary type consisting of a motor having an output shaft projecting into the inner blade housing chamber, and an inner blade having an inner blade that is attached to the output shaft and is urged by an elastic body to make sliding contact with the inner surface of the outer blade. In an electric shaver, the outer blade body is attached to the main body with a frame body, an outer peripheral outer blade attached to the frame body with an opening formed in the center, and one end portion is attached to the opening edge of the opening. Then, the other end portion is extended to the inner blade storage chamber side and a support body having a locking portion on the one end portion side and an elastic body receiving portion on the other end portion side, and a plurality of whiskers introducing holes are formed together A support portion movably positioned between the locking portion of the support body and the elastic body receiving portion, and An inner peripheral outer blade formed with a material thickness smaller than that of the outer peripheral blade, and an elastic body arranged between the elastic body receiving portion and the support portion for urging the inner peripheral outer blade toward the opening side. The rotary electric razor, characterized in that the amount of inward movement of the inner peripheral outer blade portion is made larger than the amount of movement that is pressed and moved by skin entering from the opening edge during use.