JPH05103882A - Reciprocating electric razor - Google Patents

Abstract

PURPOSE:To improve cutting efficiency of a reciprocating electric razor having an inner blade which reciprocates along an inner surface of an outer blade, even when it cuts short or short cut mustache or when it cuts mustache curved at its tip end. CONSTITUTION:An outer blade body 13 having an outer blade 15 formed with a large number of mustache introducing holes 16 is mounted detachably on an outer blade body mounting part 12 of a reciprocating electric razor body 11. An inner blade 27 has a large number of inner cutting blades 31 which is made to reciprocate along an inner surface of the outer blade 15 by a motor 17 installed in the razor body 11 and separated from and opposed to each other in its sliding direction. In this instance, interval between the adjacent inner cutting blades 31 is not uniform, that is, the interval is set to be smaller in a central part in the sliding direction and larger at both end parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver for cutting a beard by an outer blade and an inner blade which reciprocally slides along the inner surface of the outer blade.

[0002]

2. Description of the Related Art Conventionally, a reciprocating electric shaver of this type has a thin plate-shaped outer blade having a large number of beard introduction holes uniformly formed on its entire surface and is attached to the main body of the electric shaver. An inner blade is provided that slides back and forth along. The inner blade is connected to the rotating shaft of the motor via a driving member. The inner blade slides back and forth along the inner surface of the outer blade by converting the rotation of the motor into reciprocating motion by the driving member. As shown in FIG. 5, the inner blade is composed of an inner blade base 1 made of synthetic resin and a large number of metal blade inner blades 2 provided on the inner blade base 1. The inner blades 2 are regularly spaced and opposed to each other so that the inner blades 2 adjacent to each other have the same interval (interval X). Then, when the motor is operated to move the outer blade while pressing it against the skin, the beard is introduced from the beard introduction hole of the outer blade, and the introduced beard slides reciprocally with the edge of the beard introduction hole of the outer blade. It is cut with the tip edge of the inner blade 2. Further, in the outer blade, all the beard introducing holes are not made uniform over the entire surface, and a part of the beard introducing holes is made large in the sliding direction of the inner blade to introduce a curled beard with a bent tip. It is also known to make it easier.

However, none of the reciprocating electric razors having the above-described structure is capable of satisfying both the cutting performance of the whiskers and the performance of cutting all the mustaches to the shortest length.

[0004]

Therefore, the inventor of the present invention has made various studies on the above-mentioned performance of the reciprocating electric shaver, and as a result, in order to efficiently cut the whiskers, the whiskers have a whisker introduction hole. Not only is it easy to be introduced into the beard, but by cutting after the beard introduced by extending the time from the introduction of the beard to the beard introduction hole to the cutting is sufficiently introduced to its root, It turned out that it is sufficient to make it possible to cut for a long time with one cutting. Because the habitus has a curved tip and is difficult to be introduced into the beard introduction hole, it is long when once introduced into the beard introduction hole, that is, by cutting from the root to eliminate the bent portion This is because it can be easily introduced. In addition, in order to efficiently cut the short beard and perform so-called finishing, the shorter the time from the introduction of the beard to the cutting is that the beard once introduced must be cut from the introduction hole again before it is cut. It is preferable from the viewpoint of preventing it from slipping out.

The time from the introduction of the beard to the beard introduction hole to the cutting is determined by the direction of the edge of the beard introduction hole at the time when the beard is introduced into the beard introduction hole and the direction of scissors with this edge. The time varies depending on the positional relationship with the moving inner blade and the moving speed of the inner blade. However, if the time is the longest, that is, if the longest time is long, the time from the introduction of the beard to the cutting becomes long, that is, the whisker enters the root of the beard introduction hole more often, and the longest time increases. It is clear that if the length is short, the chance of cutting after the beard introduction is shortened, that is, the short beard does not often escape from the beard introduction hole.

From the above two points, when the conventional reciprocating electric shaver is examined, in all the conventional reciprocating electric shavers, the intervals between the inner blades adjacent to each other are uniform. It can be said that the longest time is uniform at the edge, and from the above-mentioned viewpoint, the beard introduction hole is suitable for one of the above two performances to some extent and the introduction hole is somewhat unsuitable for the other. Therefore, the problem with the conventional reciprocating electric shaver described above is that one of the factors is that the maximum time is uniform, and the present invention sets the maximum time to a plurality of types. This is a technical issue.

It is an object of the present invention to achieve the above object and to improve the efficiency of cutting of the whiskers and short mustaches in the reciprocating electric shaver.

[0008]

To achieve the above object, the present invention provides an outer blade having a large number of beard introducing holes and an inner blade reciprocally slid along an inner surface of the outer blade by a driving source. The inner blade has a plurality of inner blade blades spaced apart from each other in a direction intersecting the sliding direction on the inner blade base, and the inner blades are adjacent to each other. The inner blades have different intervals.

[0009]

In the reciprocating electric shaver of the present invention, in the beard introducing hole of the outer blade corresponding to the portion where the distance between the adjacent inner blades of the inner blade is large, from the time of being introduced into the beard introducing hole to the cutting thereof. If the longest time of the longest of the time is long, also, in the beard introduction hole of the outer blade corresponding to the portion where the interval between adjacent inner blades is small, from being introduced into the beard introduction hole until cut If the time is the longest, the longest time becomes shorter. Therefore, in the former case, the time from being introduced into the beard introducing hole to being cut increases, and the habitual beard is sufficiently introduced into the beard introducing hole, and the length of cutting by a single cutting is increased. become longer. Also, in the latter case, the time until the beard that has entered the beard introduction hole is shortened often becomes shorter, and once the short beard is introduced into the beard introduction hole, the beard is cut before it comes out of the introduction hole. Will tend to be.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 11 is a reciprocating electric shaver body, and an outer blade body mounting portion 12 is integrally formed on the upper portion thereof.
An outer blade body 13 is detachably attached to the outer blade attachment portion 12. The outer blade body 13 is formed of an outer blade base 14 that is open at the top and bottom, and a thin plate-shaped outer blade 15 that is detachably attached by closing the upper opening of the outer blade base 14. A large number of beard introducing holes 16 are formed in the outer blade 15.

A motor 17 as a drive source is provided in the main body 11.
A transmission mechanism 18 operated by the motor 17 is housed. The transmission mechanism 18 is the rotary shaft 1 of the motor 17.
7a, an eccentric member 20 having an eccentric shaft 19 eccentrically provided with respect to the rotating shaft 17a, and a vibrator 21.
And have. The oscillator 21 includes a base portion 22 into which the drive shaft 19 is fitted and which is movable in the left-right direction in FIG. 2, and thin-walled flexible deformable portions 23 integrally provided at both left and right ends of the base portion 22, respectively. , This flexible deformation part 2
A fixing portion 24 formed at the tip of the third member 3 and fixed to the main body 11
And an inner blade support shaft 25 protruding upward from the base portion 22. In the lower surface of the base portion 22, an elongated hole (not shown) is formed which is long in the front-back direction in FIG. 2 and into which the eccentric shaft 19 is fitted.

Therefore, since the eccentric shaft 19 which is eccentrically rotated by the rotary shaft 17a slides in the elongated hole when the motor 17 is driven, the eccentric shaft 19 presses the base portion 22 only in the left-right direction, and is flexibly deformed. The base portion 22 reciprocates in the left-right direction with the flexible deformation of the portion 23. The inner blade support shaft 25 that moves integrally with the base portion 22 penetrates a through hole 26 formed in the upper end wall of the outer blade mounting portion 12. An inner blade 27 is attached to the upper end of the inner blade support shaft 25,
The inner blade 27 is pressed toward the inner surface of the outer blade 15 by a coil spring 28 wound around the inner blade support shaft 25. Further, between the through hole 26 and the inner blade support shaft 25, a rubber packing 29 for closing them is attached.

The inner blade 27 is an inner blade base 30 made of synthetic resin which is detachably mounted on the inner blade support shaft 25, and the inner blade base 30.
And a large number of metal inner blades 31 fixed by insert molding. Several sets of inner blades 31 form an inner blade group. In other words, the inner blade 27 is composed of the inner blade base 30 and a large number of inner blades composed of several inner blade groups.
The large number of inner blades 31 have a thickness of about 0.1 mm, and are arranged side by side in a direction orthogonal to the sliding direction of the inner blades 27 so as to be separated from each other. Then, the intervals between the inner blades 31 adjacent to each other are not uniform, and as shown in FIG. 1, the interval is the smallest P ₁ at the center of the sliding direction, and P ₂ , P ₃ , ─ P _n (P ₁ <P ₂ <P ₃ <─ P
_n ). That is, an inner blade blade group having a small gap between adjacent inner blade blades is formed at the central portion A, and an inner blade blade group having a large gap between adjacent inner blade blades is formed at both end portions B. Here, P ₁ is set to 0.8 mm and P _n is set to about 1.8 mm. The stroke for the inner blade 27 to reciprocate is set to about 2.4 mm, and each beard introduction hole is traversed by the inner blade 31 at least twice, preferably three or more times when the inner blade 27 reciprocates. It has become.

Further, the large number of beard introducing holes 16 formed in the outer blade 15 are not uniform in size, and as shown in FIG. 3, the central portion in the sliding direction is S ₁ having the minimum length of one side (inner blade The length of 27 in the sliding direction) is 0.4 mm, and the length of the other side is about 0.2 mm. It is formed into a substantially rectangular shape, and S ₂ , S ₃ , ──S _n (S ₁ <S ₂ <P ₃ <─ S
_n ), and both ends have a substantially rectangular shape with one side of 0.9 mm and the other side of about 0.45 mm. The spacing between the adjacent beard introducing holes 16 in the sliding direction is approximately uniform and is about 0.3 to 0.4 mm. In this way, the number of the beard introducing holes 16 per unit area is equal to that of the outer blades 15 corresponding to the inner blade blade group located at the central portion in the sliding direction of the inner blade base 30 and having a small gap between the adjacent inner blade blades 31. The inner blade blade groups located at both ends in the sliding direction of the inner blade base 30 and having a large interval between the adjacent inner blade blades 31 correspond to the both ends in the sliding direction of the outer blade, which are large in the central portion in the sliding direction. It decreases as you go.

The operation will be described based on the above configuration.
When the motor 17 is operated by a switch (not shown) to move the outer blade 15 while pressing it against the skin, a beard is introduced from the beard introducing hole 16 of the outer blade 15 and the inner blade 31
And is cut by the tip edge of the inner blade 31 and the edge of the beard introducing hole.

In the inner blade group in which the distance between the inner blades 31 adjacent to each other in the central portion A in the sliding direction of the inner blade 27 is small, the tip edge of the inner blade 31 and the edge portion of the beard introducing hole 16 are once removed. The length of the beard that is cut by cutting becomes shorter,
Since the number of the beard introducing holes 16 of the outer blade 15 is large, the number of times the inner blade 31 crosses the beard introducing hole 16 increases, and the chances of cutting are increased. On the other hand, in the inner blade group in which the intervals between the inner blades 31 are large, the inner blades 31
However, the number of times the beard is cut across the beard introducing hole 16 is long, but the length of the beard that is cut by a single cut between the tip of the inner blade 31 and the edge of the beard introducing hole is long. Therefore, when cutting a linear beard having a certain length, it is possible to efficiently cut any portion.

When the beard to be cut includes a quirky beard with a bent tip, both ends B in the sliding direction of the inner blade 27, that is, a group of inner blade blades having a large gap between the adjacent inner blades 31. By cutting the whiskers with the inner blade 31, the time until the whiskers that have entered the beard introduction hole 16 are cut is lengthened, and the inner blade 31
The beard can be cut for a long time by cutting the tip edge and the edge of the beard introduction hole once. Therefore, the tip of the remaining beard becomes linear and extends perpendicularly to the beard introducing hole 16, so that the beard is easily introduced into the beard introducing hole 16 next. Therefore, it is possible to improve the cutting efficiency of the whiskers as a whole.

Next, a case where so-called finishing is performed by cutting a beard that is short or has been cut and shortened will be described. In order to cut these short whiskers, the whiskers are introduced by cutting the whiskers with the central portion of the inner blade 27 in the reciprocating direction, that is, the inner blade blades 31 of the inner blade blade group having a small gap between adjacent inner blade blades 31. By shortening the time until the beard that has entered the hole 16 is cut, it is possible to reliably cut even a short beard moving on the outer blade. Therefore, the finishing time can be shortened. In addition,
The above-mentioned effect can be obtained not only by selectively using the part that intentionally cuts depending on the type of beard that the user wants to cut, but also by pressing the entire surface of the outer blade 15 against the beard that the user cuts. The same effect can be obtained by applying. The main body case 1
1 is suitable for finishing in a position where the inner blade blades having a small interval between adjacent inner blades are located, and is suitable for a whiskers in a position where an inner blade blade having a large interval between adjacent inner blades is located It is advisable to display a message to that effect.

Further, according to the reciprocating electric shaver of the present embodiment, the beard introduction holes corresponding to the inner blade groups having a small interval between the adjacent inner blades 31 have a small size and a small number per unit area. Since the number of blades is increasing, the chance of cutting with the inner blade blade 31 that reciprocates increases,
It can be cut in a short time. Moreover, the whisker introduction hole 16 corresponding to the inner blade blade group having a large gap between the adjacent inner blades is suitable for cutting the whisker, which is difficult to be introduced into the beard introduction hole in the outer blade. Since it is easy to introduce a beard, it can be cut more efficiently.

Since the human face has irregularities, the outer blade 1
6 The entire surface may not come into contact with the skin. In general, when a user cuts off a beard, the central portion of the outer blade 16 in the sliding direction of the inner blade 27 is pressed against the skin, and therefore the degree of close contact with the skin at both ends of the outer blade 16 is the central portion. Lower than. On the other hand, the blunt beard with a bent tip is the outer blade 15
If the degree of close contact between the outer blade 15 and the skin is high, the outer blade 16 lays it down and it is difficult for the outer blade 15 to be introduced into the beard introducing hole 16. In the reciprocating electric shaver of the present embodiment, the interval between the inner blades 31 adjacent to each other at both ends B in the sliding direction of the inner blade 27, which easily introduces the whiskers, is increased so as to be suitable for cutting the whiskers. Since it is arranged, the beard can be cut more efficiently.

In the above embodiment, the number of beard introducing holes 16 formed in the outer blade 15 per unit area is defined as the inner blade 27.
The number of the beard introducing holes 16 per unit area is large in the central portion in the sliding direction of the outer blade 15 but is small in both end portions.
Even if the entire surface is made uniform, the same effect can be obtained.
That is, according to the present invention, the inner blade blades 31 are arranged so that the intervals between the adjacent inner blade blades 31 are two or more different intervals, whereby the beard is introduced into the beard introducing hole 1.
It is not always necessary to form a group as long as it satisfies the fact that the longest beard introduction hole and the shortest beard introduction hole are formed from the time of being introduced into the No. 6 to being cut. Further, for example, in FIG. 1, the left half may be an inner blade group having a small interval between adjacent inner blades, and the right half may be an inner blade group having a large interval.

Next, another embodiment of the present invention will be described with reference to FIG. Only the inner blade is different from the above embodiment, and the other structures are the same, so only the inner blade will be described. Reference numeral 40 denotes an inner blade, which includes an inner blade base 41 made of synthetic resin and a large number of metal inner blade blades 42 fixed to the inner blade base 41 by insert molding. The large number of inner blades 42 have a thickness of about 0.1 mm, and are provided so as to face each other in the sliding direction. The interval between the adjacent inner blades 42 is about 1.0 mm at P11 in the inner blade group at the central portion A1 in the sliding direction of the inner blade 40 and P21 at the inner blade groups at both ends B1. It is set to about 1.6 mm.

In this embodiment, the inner blades 4 adjacent to each other are
It has an inner blade group of P11 with a small interval of 2 and an inner blade group of P21 with a large interval. For this reason,
When finishing is performed in the same manner as in the above example, by cutting the beard with an inner blade blade group having a small interval, and the whiskers are efficiently beard in any case by cutting with an inner blade group having a large interval. Can be cut. The bevel introduction hole 16 of the outer blade 15 is matched with the inner blade 27 of the present embodiment to have two sizes, and the portion corresponding to the inner blade blade group having a small interval is small, and corresponds to the inner blade blade group having a large interval. The area to be used may be large.

[0024]

As described above, according to the reciprocating electric shaver of the present invention, a beard is formed at a portion having a large gap between adjacent inner blades and a short beard is formed at a portion having a small gap between adjacent inner blades. By cutting and performing so-called finishing, it is possible to improve the cutting efficiency and cut in a short time in any case.

[Brief description of drawings]

FIG. 1 is a side view showing an inner blade of a reciprocating electric shaver showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a reciprocating electric shaver similarly showing an embodiment of the present invention.

FIG. 3 is an explanatory view showing the relationship between the inner blade of the reciprocating electric shaver and the beard introducing hole of the outer blade according to the embodiment of the present invention.

FIG. 4 is a side view showing an inner blade of a reciprocating electric shaver showing another embodiment of the present invention.

FIG. 5 is a side view showing an inner blade of a conventional reciprocating electric shaver.

[Explanation of symbols]

 15 Outer Blade 16 Mustache Inlet Hole 17 Drive Source (Motor) 27 Inner Blade 30 Inner Blade Stand 31 Inner Blade

Claims (1)

[Claims] 1. An outer blade having a large number of beard introducing holes,
It has an inner blade that reciprocally slides along the inner surface of the outer blade by a drive source, and this inner blade separates a large number of inner blade blades from each other in a direction intersecting the sliding direction of the inner blade base. A reciprocating electric shaver, wherein the plurality of inner blades are arranged side by side, and adjacent inner blades of the plurality of inner blades have different intervals.