JPH0796083A - Electric razor - Google Patents

Abstract

PURPOSE:To provide the electric razor which can shave efficiently hair of a roughly concave-shape-like part such as armpit, etc. CONSTITUTION:This electric razor is constituted by providing plural outer blades 2a, 2b of mutually different curvatures, which are provided with a leading-in hole of hair and curved to the reciprocating motion direction of an inner blade 3 and provided in parallel so that the projection heights from a housing 1 are mutually different, inner blades 3, 3 provided on the inside of the outer blades 2a, 2b in order to cut off hair led into the leading-in hole of the outer blades 2a, 2b, and a driving part 5 for allowing the inner blades 3, 3 to execute a reciprocating motion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an outer blade having a hair introducing hole, and an inner blade disposed inside the outer blade and cutting the hair introduced into the introducing hole by reciprocating. For electric razors.

[0002]

2. Description of the Related Art As an electric shaver of this kind, it has been introduced into an outer blade having an introduction hole for bristles, which is curved in the reciprocating direction of the inner blade and projected on a housing, and an introduction hole of the outer blade. A reciprocating type is generally known, which includes an inner blade corresponding to the outer blade for cutting hair and arranged inside thereof, and a drive unit for reciprocating the inner blade. This electric razor provided with an outer blade which is curved in the reciprocating direction of the inner blade is mainly used for shaving a generally concave portion, for example, axillary hair.

[0003]

However, since the curvature of the axilla is not constant, when the outer blade having the constant curvature as described above is brought into contact with the axilla to shave the hair, the hair may be shave. Had insufficient adhesion to the axilla, resulting in poor shaving condition.
On the other hand, in order to improve the adhesion to the armpit, a rotary electric razor that cuts hair with a roughly spherical outer blade and an inner blade that rotates inscribed in it can be considered. In this case, since the peripheral speed of the central portion is slower than that of the circumferential portion, there is a problem that the hair cutting efficiency by the central portion is poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric shaver capable of efficiently shaving the hair of a generally concave portion such as an axilla.

[0005]

In order to solve the above problems, the electric shaver according to claim 1 is provided with a hair introduction hole, is curved in the reciprocating direction of the inner blade, and is projected on the housing. An outer blade, and an inner blade arranged inside the outer blade in order to cut the hair introduced into the introduction hole of the outer blade,
In an electric shaver including a drive unit that reciprocates an inner blade, a plurality of outer blades having different curvatures are arranged side by side so as to have different projecting heights from a housing.

According to a second aspect of the electric shaver, a plurality of outer blades according to the first aspect are arranged side by side with substantially the same protruding height, and at least one of the outer blades is displaced in the direction in which it is retracted. At the same time, a biasing means for biasing in the opposite direction is provided.

In the electric shaver according to a third aspect of the present invention, the drive section according to the second aspect has a plurality of swing arms for supporting inner blades provided corresponding to a plurality of outer blades, and
At least one of the swing arms has a swing fulcrum different from the others.

In the electric shaver according to a fourth aspect of the present invention, a plurality of outer blades according to the first to third aspects are arranged such that the protruding heights are gradually increased from one end to the other end in the arrangement direction. It is set up.

According to a fifth aspect of the present invention, there is provided an electric shaver comprising a plurality of outer blades according to the first to third aspects of the present invention, wherein three outer blades are provided so that the protruding height gradually increases from both ends of the outer blade to the center thereof. The above is arranged in parallel.

According to a sixth aspect of the present invention, there is provided an electric shaver according to the first to fifth aspects, wherein at least one of the plurality of inner blades provided corresponding to the plurality of outer blades has a phase opposite to that of the other. It is configured to reciprocate with.

[0011]

According to the structure of claim 1, a plurality of outer blades having different curvatures are arranged side by side so that the protruding heights from the housing are different, so that the adhesion to a generally concave surface portion such as an axilla or the like. Is improved.

According to the structure described in claim 2, in addition to the function described in claim 1, a plurality of outer blades are arranged side by side with substantially the same protruding height, and at least one of them is arranged. Since the urging means that displaces in the direction of sinking and urges in the opposite direction is provided, the outer blade is displaced in accordance with the curvature of the substantially concave portion such as the armpit.

According to the structure of claim 3, in addition to the function of claim 2, there are provided a plurality of swing arms for supporting the inner blades provided corresponding to the plurality of outer blades, and
Since at least one of the swing arms has a swing fulcrum different from the others, the swing radii of the inner blades can be different.

According to the structure described in claim 4, in addition to the operation described in claims 1 to 3, the plurality of outer blades are protruded in a stepwise manner from one end to the other end in the arrangement direction. Since they are arranged side by side so that the height becomes higher, the envelope of the outer blade has a gentle curved shape.

According to the structure described in claim 5, in addition to the functions described in claims 1 to 3, the plurality of outer blades are protruded in a stepwise manner from both ends in the arrangement direction to the middle one. Since three or more pieces are arranged side by side so that the height becomes higher, the envelope of the outer blade has a sharp curved shape.

According to the structure of claim 6, in addition to the effects of claims 1 to 5, at least one of the plurality of inner blades provided corresponding to the plurality of outer blades is provided as the drive unit. Since it is formed so as to reciprocate in a phase opposite to that of the others, the balance of reciprocation of the plurality of inner blades is improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This electric razor has first and second
It is provided with outer blades 2a and 2b, two inner blades 2 and 2, and a drive unit 5 having first and second swing arms 9a and 9b.

The first and second outer blades 2a, 2b have a substantially U-shaped cross section.
It has a character shape and is curved in the reciprocating direction of the inner blade 2 and protrudes from the housing 1, and has a hair introducing hole (not shown).

The first and second outer blades 2a and 2b have different curvatures in the reciprocating direction of the inner blade 2, and the housing 1
Are also juxtaposed so that the protruding heights from are different. Specifically, the second outer blade 2b is curved so as to have a radius of curvature larger than that of the first outer blade 2a, and is protruded from the housing 1 so that the protruding height is higher than that of the first outer blade 2a. To be done. FIG. 4 is a partially omitted front view showing a state in which the contours of the first and second outer blades 2a and 2b are viewed from the arranging direction. in this way,
By making the curvatures of the first and second outer blades 2a and 2b and the protruding height from the housing 1 different, the first and second outer blades 2
Adhesion of a and 2b to the armpit is improved, and hair can be shaved efficiently.

The inner blade 2 is provided with first and second outer blades for cutting hairs introduced into the introduction holes of the first and second outer blades 2a, 2b.
Corresponding to 2a and 2b, they are arranged inside thereof. Two
The individual inner blades 2, 2 are urged outward by a push-up spring 4 so as to be inscribed in the first and second outer blades 2a, 2b, and at the same time, the first and second swings of a drive unit 5 to be described later. It is supported by arms 9a and 9b, respectively.

The drive unit 5 includes a motor 6, first and second eccentric cams 7a and 7b, first and second spherical bearings 8a and 8b, first and second swing arms 9a and 9b, a fulcrum shaft 10 and the like. Consists of 2 inner blades
To reciprocate. Specifically, the first eccentric cam 7a is attached to the output shaft 6a of the motor 6, and
The first spherical bearing 8a is located at a position eccentric to the output shaft 6a of the 7a.
Is attached. The first swing arm 9a has an inner blade mounting portion at the upper end and a spherical bearing coupling portion at the lower end. The fulcrum shaft 10 penetrates the first swing arm 9a. This fulcrum axis
The bearing 10 is fixed to the inner wall of the housing 1 by a bearing 11.

Further, the first spherical bearing 8a has a second eccentric cam.
7b is attached, and the second spherical bearing 8b is attached to the second eccentric cam 7b at a position eccentric to the output shaft 6a on the opposite side of the first spherical bearing 8a. Then, the second swing arm 9b is connected to the second spherical bearing 8b. The second swing arm 9b includes
The fulcrum shaft 10 penetrates similarly to the first swing arm 9a.

Further, the length of the second swing arm 9b from the portion through which the fulcrum shaft 10 penetrates to the tip is such that the protruding height of the second outer blade 2b is higher than the protruding height of the first outer blade 2a. Together, first
It is longer than the swing arm 9a. Furthermore, from this, the swing radius of the inner blade 2 supported by the second swing arm 9b is
It becomes larger than the swing radius of the inner blade 2 supported by the first swing arm 9a, and the swing radius is the curvature of the second outer blade 2b.
It is suitable for larger than the curvature of 2a.

The reciprocating motion of the inner blade 2 by the drive unit 5 will be briefly described. First, the rotation of the motor 6 causes the first and second spherical bearings 8a, 8b to perform eccentric motion, and as a result, the first
Also, the second swing arms 9a and 9b swing about the fulcrum shaft 10 as a fulcrum to reciprocate the inner blade 2. Here, by attaching the first and second spherical bearings 8a, 8b to the first and second eccentric cams 7b so as to be positioned opposite to each other with respect to the output shaft 6a, the two inner blades 2,2 Reciprocates in opposite phase to cut hair, so the reciprocating momentum of the inner blade 2 causes the housing 1
Is less likely to swing right and left, and the hair can be cut while the first and second outer blades 2a and 2b are stable.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.
It will be described based on. The members having the same basic functions as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Explaining the different parts, the first and second outer blades 2a, 2b of the electric razor are arranged side by side so that the protruding heights from the housing 1 are the same. A biasing spring 12 that displaces the first outer blade 2a in the retracting direction and biases the first outer blade 2a in the opposite direction is provided at the mounting portion of the first outer blade 2a on the housing 1. That is, as shown in FIG. 7, the first outer blade 2a is displaced in the direction in which the first outer blade 2a is depressed when it is pressed against the armpit, so that the first and second outer blades 2a and 2b have different heights. Become. At this time, the push-up spring 4 that biases the inner blade 2 contracts, so that the inner blade 2 also becomes the first outer blade.
It is displaced along with 2a in the direction of sinking.

The swing radius of the inner blade does not necessarily have to match the radius of curvature of the outer blade, and may be larger than the radius of curvature of the outer blade. That is, the first and second swing arms 9a, 9
The length from b through the fulcrum shaft 10 to the tip is
It may be the same as long as the swing radius of the inner blade 2 is larger than the radius of curvature of the second outer blade 2b. In addition, as shown in FIG. 8, the first and second swing arms 9a and 9b have different swing fulcrums so that the first and second swing arms 9a and 9b have different swing fulcrums.
Even if the first and second fulcrum shafts 10a and 10b respectively corresponding to b are individually provided, and the swing radius of the inner blade 2 is made different according to the radius of curvature of the first and second outer blades 2a and 2b. Of course it's good.

Next, a third embodiment of the present invention will be described with reference to FIGS.
It will be described based on 2. The members having the same basic functions as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Explaining different parts, this electric razor has a third outer blade in addition to the first and second outer blades 2a and 2b.
With 2c. The third outer blade 2c is curved so as to have a larger radius of curvature than the second outer blade 2b, and the second outer blade 2b is formed.
It is projected on the housing 1 so that the protruding height becomes higher. Further, in order to cut the hair introduced into the introduction holes of the first to third outer blades 2a, 2b, 2c, the three inner blades 2, 2, 2 are first
Through the third outer blades 2a, 2b, 2c are arranged inside thereof. Further, the drive unit 5 includes the inner blade 2 corresponding to the third outer blade 2c.
Has a third swing arm 9c for supporting the. This third
The swing arm 9c is connected to the first spherical bearing 8a.

In this way, a plurality of outer blades having different curvatures are
By arranging from one end to the other end in the arranging direction so that the projecting height gradually increases, the envelope curve forms a gentle curve, so that a roughly concave portion of the armpit, etc. It is possible to shave hair particularly efficiently in a portion having a gentle curve.

The first to third outer blades 2a, 2b, 2c are arranged side by side with the same projecting height, for example, the first and second outer blades 2a, 2c.
Needless to say, the bias springs 12 and 12 may be provided at the mounting portion of b on the housing 1.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The members having the same basic functions as those of the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

Explaining different parts, this electric razor has a third outer blade in addition to the first and second outer blades 2a and 2b.
With 2c. The third outer blade 2c is curved so as to have a larger radius of curvature than the second outer blade 2b, and has the same protrusion height as the first and second outer blades 2a, 2b. It is projected. Then, the first and third outer blades 2a, 2c
The first and third outer blades 2a, 2 on the mounting part of the
Biasing springs 12, 12 are provided for displacing c in the direction of sinking and for biasing in the opposite direction. That is, as shown in FIG. 14, the first and third outer blades 2a, 2c are displaced in a direction in which the first and third outer blades 2a, 2c are depressed when they are pressed against the armpit, so that the first and third outer blades 2a, 2c and the second outer blades 2a, 2c The height of the outer blade 2b is different.

Further, in order to cut the hairs introduced into the introduction holes of the first to third outer blades 2a, 2b, 2c, the three inner blades 2, 2, 2 have the first to third outer blades 2a. , 2b, 2c are provided inside thereof. Further, the drive unit 5 is an inner blade corresponding to the third outer blade 2c.
It has a third swing arm 9c for supporting 2. The third swing arm 9c is connected to the first spherical bearing 8a.

In this way, a plurality of outer blades having different curvatures are
By arranging 3 or more in parallel so that the projecting height gradually increases from both ends in the arranging direction to the center, the envelope curve forms a sharp curve, so a roughly concave part such as an armpit In both the part where the curve is gentle and the part where it is sharp,
You can shave hair efficiently.

It is needless to say that the first to third outer blades 2a, 2b, 2c may be arranged side by side, for example, omitting the urging spring 12 and having different protruding heights. .

[0037]

The electric shaver according to claim 1 has a plurality of outer blades having different curvatures and projecting heights from the housing, thereby improving the adhesion to a generally concave portion such as an axillary, Can be shaved efficiently.

The electric shaver according to claim 2 is the same as that according to claim 1.
On the effect described above, at least one of the plurality of outer blades is displaced in the direction of sinking in accordance with the curvature of the substantially concave surface portion of the armpit or the like and is biased in the opposite direction by the biasing means, It is possible to make close contact with a generally concave portion such as the armpit without pressing the outer blade strongly.

The electric shaver according to claim 3 is the same as that according to claim 2.
On the effect described, since at least one of the plurality of swing arms supporting the inner blade has a swing fulcrum different from the others, even if the protrusion heights of the plurality of outer blades are substantially the same, The swing radius of the inner blade can be changed to correspond to the radius of curvature of the outer blade.

The electric shaver according to claim 4 is the same as that according to claim 1.
In addition to the effects described in 3 to 3, the envelopes of the plurality of outer blades arranged in parallel so that the protruding height gradually increases from one end to the other end in the arranging direction form a gentle curved shape. So
It is possible to shave hair particularly efficiently in a portion of a generally concave portion such as an armpit where the curvature is gentle.

The electric shaver according to claim 5 is the same as that according to claim 1.
In addition to the effects described in 3 to 3, the envelopes of three or more outer blades arranged in parallel so that the projecting height gradually increases from the ends to the center in the arranging direction form a sharp curve. Because eggplant
It is possible to efficiently shave hair in both a gentle curved portion and a sharp curved portion of a generally concave portion such as an armpit.

The electric shaver according to claim 6 is the same as that according to claim 1.
In addition to the effects described in 5 to 5, since at least one of the plurality of inner blades reciprocates in a phase opposite to that of the other inner blades, the reciprocal movement of the plurality of inner blades is well balanced, and the hair is shaved in a stable state. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an inner blade and a driving unit.

FIG. 3 is a perspective view showing the outer blade.

FIG. 4 is a partially omitted front view showing the contour of the outer blade.

FIG. 5 is a side view showing a state where the outer blade is in contact with the armpit.

FIG. 6 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state where the outer blade is brought into contact with the armpit.

FIG. 8 is a cross-sectional view showing an example in which a fulcrum shaft of the swing arm is individually provided.

FIG. 9 is a sectional view showing a third embodiment of the present invention.

FIG. 10 is a perspective view showing the outer blade.

FIG. 11 is a partially omitted front view showing the contour of the outer blade.

FIG. 12 is a side view showing a state where the outer blade is brought into contact with the armpit.

FIG. 13 is a side view showing a fourth embodiment of the present invention.

FIG. 14 is a side view showing a state where the outer blade is brought into contact with the armpit.

[Explanation of symbols]

 1 Housing 2a 1st outer blade 2b 2nd outer blade 2c 3rd outer blade 3 Inner blade 5 Drive part

Claims (6)

[Claims] 1. An outer blade having a hair introduction hole, which is curved in the reciprocating direction of the inner blade and protrudes from the housing, and an outer blade for cutting the hair introduced into the introduction hole of the outer blade. In an electric shaver including an inner blade disposed inside the inner blade corresponding to, and a drive unit for reciprocating the inner blade, a plurality of outer blades having different curvatures are provided with different protruding heights from the housing. Electric razor characterized by being installed side by side. 2. The plurality of outer blades are arranged in parallel with each other with projecting heights substantially the same, and at least one of the outer blades is provided with a biasing means for displacing the outer blades in the dipping direction and biasing in the opposite direction. The electric razor according to claim 1, wherein: 3. The drive unit has a plurality of swing arms that support inner blades provided corresponding to the plurality of outer blades, and at least one of the swing arms is different from other swing arms. The electric razor according to claim 2, wherein the electric razor has a fulcrum. 4. The electric equipment according to claim 1, wherein the plurality of outer blades are arranged side by side in such a manner that a projecting height gradually increases from one end to the other end in the arrangement direction. Razor. 5. The three or more outer blades are arranged side by side in such a manner that the projecting height gradually increases from both ends of the outer blade to the central one in the arrangement direction. Electric razor. 6. The drive unit is formed so that at least one of a plurality of inner blades provided corresponding to a plurality of outer blades reciprocates in a phase opposite to that of the other. An electric shaver according to any one of 1 to 5.