JPH0817860B2 - Rotary electric razor blade - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotary electric razor blade having a skin contact guide on the outer periphery thereof.

(Background Art) Various rotary electric razors having a skin contact guide on the outer periphery have been provided so far.

As one of them, the actual exploitation 53-8449 shown in Figs. 25 and 26 is shown.
There is one described in No. 7 publication. In this example, an outer cutter 1'formed in a single dome shape is provided with a vertically movable skin pressing portion 8 ', but in the vicinity of the skin pressing portion 8', as shown in FIG. The skin S is separated from the hair S, and the distance F between the hair H and the outer blade 1'becomes large, so that the hair H is not introduced into the blade hole of the outer blade 1 '.

As another example, the actual development 52 shown in FIG. 27 to FIG.
There is one described in Japanese Patent No. 119997. Similar to the above example, this is equipped with a skin stretching ring 8 "that can be raised and lowered on the outer circumference of the outer blade 1" formed in a single dome shape. Three-dimensional slit part on the periphery
15 'is formed, and the skin stretching ring 8 "is formed as a barrier for preventing the scattering of whiskers from the three-dimensional slit portion 15'. However, this example also shows the skin as shown in Fig. 31. In the state where the stretching ring 8 ″ is protruding, the contact point J between the dome-shaped outer blade 1 ″ and the skin S is the same as in the above example.
Is the center of the outer blade 1 ″. Therefore, since a gap G is formed between the skin S and the outer peripheral surface of the outer blade 1 ″ where the three-dimensional slit portion 15 ′ is present, the hair H is introduced into the three-dimensional slit portion 15 ′. Has become worse.

Also, the skin stretching ring 8 "from the state shown in FIG.
If the lower part is lowered, the skin stretching ring 8 ″ is located below the surface of the outer blade 1 ″, and the hair H can be introduced, but the skin S is stretched or the action of the guide for preventing the skin from protruding. Will not do.

As described above, the conventional single dome-shaped outer blade has a drawback that hair is not introduced into the outer peripheral portion in the vicinity of the skin stretching ring and long hair cannot be shaved.

(Object of the invention) The present invention has been proposed in view of the above points, and an object of the present invention is to weaken the stimulus applied to the skin to improve the skin contact and at the same time to facilitate the introduction of hair, and to provide long hair. The object is to provide a rotary electric razor blade with a skin contact guide that can be shaved.

DISCLOSURE OF THE INVENTION In order to achieve the above object, the present invention provides an outer blade having a flat portion having a slit-shaped blade hole on the outer periphery of a dome-shaped net blade, and a gap between the outer periphery of the outer blade and the outer blade. A blade of a rotary electric razor, which is characterized in that it is provided with an annular skin contact guide configured to be substantially flush with the flat portion of the outer blade.

Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment will be described with reference to FIGS.

In this embodiment, an outer blade of a rotary electric shaver is composed of 1, a net blade 2 whose inner peripheral portion is formed in a dome shape, and a flat portion 4 in which a slit-shaped blade 3 is formed substantially radially on the outer periphery thereof. It was formed. The outer blade 1 is integrally fixed to the outer blade frame 5, and the outer blade frame 5 is screwed to a blade mounting base 7 located above the housing 6 of the main body. Further, an annular skin contact guide 8 is fitted on the outer side of the outer blade frame 5, and the upper end of this skin contact guide 8 is the flat portion 4 of the outer blade 1.
And a gap K of about 0.5 to 2.0 mm is formed between the skin contact guide 8 and the outer periphery of the outer cutter 1.

An inner blade 11 pressed against the outer blade 1 by a push-up spring 9 is engaged with and supported by an inner blade frame 12 inside the outer blade 1. The inner blade frame 12 is connected to a motor 14 by a joint 13. It is driven to rotate.

FIG. 4 shows the usage state of the present embodiment, and when the outer blade 1 is pressed against the skin S and displaced, the skin contact guide 8
As a result, the long hair H is laid down once, but becomes free in the gap K and rises and is introduced into the three-dimensional slit portion 15 of the outer blade 1. Since the tip of the skin contact guide 8 and the flat portion 4 of the outer blade 1 are substantially flush with each other, the flat portion 4 of the outer blade 1 and the skin S are closely attached to each other without a gap, so that the introduction of the hair H is improved and long hair is shortened. You can shave your hair well.

In addition, since the skin contact guide 8 arranged on the outer periphery of the outer blade 1 prevents the skin S from excessively protruding to the blade surface, even in the case of soft skin such as an armpit, the flat portion of the outer blade 1 is prevented. Four
The skin S is prevented from entering the slit-shaped blade holes 3 formed in the above, and shaving can be performed in a non-stimulating state.

 Next, a second embodiment will be described with reference to FIG.

In this embodiment, the introduction of bristles into the outer blade is further improved as compared with the first embodiment. That is, since the inside of the flat portion 24 of the outer blade 21 has the function of freeing the hair in the gap K to raise it and then introducing it into the three-dimensional slit portion, the flat formed on the outer periphery of the outer blade 21. At the boundary between the portion 24 and the dome-shaped net blade 22 formed on the inner periphery, a concave portion 26 having a concave concave cross section is formed, and a blade hole of the flat portion 24 is formed from the rib 33 which is the bottom portion of the concave portion 26. The slit 23 is formed continuously up to the flange rib 34 at the outer edge of the flat portion 24, and the inner blade is further divided into an inner peripheral inner blade 30 and an outer peripheral inner blade 31.

In this embodiment, the outer blade 21 is formed by the recess 26 formed in the outer blade 21.
Since the hairs coming from the inner peripheral side are once free and are introduced into the slits 23 of the flat portion 24, the effect of introducing hairs is further enhanced as compared with the first embodiment. Further, since the slit 23 is formed as a three-dimensional slit portion 35 by being formed up to the rising portion of the outer periphery of the flat portion 24, there is no rib for laying hair in the radial direction from the center of the outer blade 21, and the outer blade 21 The introduction of the bristles into the surface of the flat portion 24 formed on the outer periphery becomes very good. In the figure, 25 is an outer blade frame, 27 is a cover fitted to the outer blade frame 25 to fix the outer blade 27, 28 is a skin contact guide, 29 is a push-up spring, 32 is an inner blade frame, and The other parts are the same as those in the first embodiment, and the description thereof will be omitted.

Next, a third embodiment will be described with reference to FIGS.

In this embodiment, the height of the skin contact guide in the second embodiment can be adjusted in two or more steps. As shown in FIG. 6, the flat portion 24 formed on the outer periphery of the outer cutter 21 and the skin contact guide 36 are provided. The skin contact guide engaging boss 37 formed on the outer blade frame 25 'and the upper fitting groove 38 formed on the skin contact guide 36 are engaged so that the step T at the tip of the skin contact surface becomes substantially flush with the outer surface of the outer blade frame 25'. It is a thing. The operation state of the skin contact guide 36 at this time is the same as that of the second embodiment, that is, the flat portion formed on the outer blade 21.
The skin S supported by the skin contact guide 24 and the skin 24 is substantially flush with each other, and long hairs can be introduced and cut without being stimulated by the blade surface. However, when the skin S is strongly pressed, the skin S is flat at the flat portion 24. There is a risk of cutting. Therefore, as shown in FIG. 7, the lower fitting groove 39 formed in the skin contact guide 36 is formed in the outer blade frame 25 '.
The skin contact guide engagement boss 37 is engaged with the top of the net blade 22 of the outer blade 21 and the tip of the skin contact guide 36 are substantially flush with each other.
Adjust to the height of. By thus projecting the skin contact guide 36, a sufficient gap U is formed between the flat portion 24 and the upper end surface of the skin contact guide 36, and the skin S is not cut even if the skin S is strongly pressed. . On the other hand, since the close contact between the net blade 22 at the center of the outer blade and the skin S can be made as shown in the figure, it is convenient to finish and shave the hair which is short to some extent and can be introduced into the small blade hole of the net blade 22. .

The parts other than the above are common to those of the second embodiment.
The same parts are given the same numbers and their explanations are omitted.

Next, a fourth embodiment will be described with reference to FIGS.

This embodiment is the same as the skin contact guide of the first embodiment.
The comb groove 41 is formed at the tip of the
41 and the slit-shaped blade holes 3 formed in the flat portion 4 of the outer blade 1 are aligned radially on a straight line passing through the center thereof. In addition, reference numeral 44 in the drawing denotes an outer blade crosspiece that remains in the middle of the slit-shaped blade hole 3 and the blade hole 3. By forming the comb groove 41 in this manner, the hair laying down at the tip of the skin contact guide 8 as shown in FIG. 4 in the first embodiment is reduced, and the comb groove 41 is used as shown in FIG. At this time, the hairs H remain free and pass through the comb grooves 41 and are introduced into the blade holes 3 of the three-dimensional slit portion 15 of the outer blade 1. Further, a comb portion 43 is formed of a comb groove 41 at the tip of the skin contact guide 40 and a comb rib 42 left in the middle of the comb groove 41. By the comb portion 43, a hair-regulating function is obtained and the hair H becomes a comb groove.
It is easy to be invited to 41 and the introduction effect is improved.

Since the skin S is supported by the comb ribs 42, the skin S is more likely to project into the blade hole 3 formed in the flat portion 4 of the outer blade 1 than when the comb groove 41 is not provided. It has little effect on stimulation.

Also, since the parts other than the above are common to the first embodiment,
The same parts are given the same numbers and their explanations are omitted.

Next, a fifth embodiment will be described with reference to FIGS. 12 and 13.

This embodiment is the same as the skin contact guide of the fourth embodiment.
The comb portion 51 formed at the tip portion thereof has both the comb rib 52 having an original height and the comb rib 53 having a reduced height. Low-comb rib
53 is a height lower than that of the flat portion 4 of the outer cutter 1 by a step V. Fig. 13 shows the comb rib having the original height.
52 and low-comb comb ribs 53 are arranged every other one through the comb groove 54.

By forming the comb portion 51 at the tip of the skin contact guide 50 in this way, the introduction of hair is improved by the amount of the step V as compared with the fourth embodiment. It should be noted that although the stimulus applied to the skin S is slightly increased, this has no significant effect in practical use.

Since the other parts than the above are common to the fourth embodiment,
The same parts are given the same numbers and their explanations are omitted.

Next, a sixth embodiment will be described with reference to FIGS.

In this embodiment, the skin contact guide 60 in the second embodiment is used, and its tip is formed of a material such as rubber having a large frictional resistance when brought into contact with the skin S. In the one shown in the figure, the tip end portion 61 made of rubber or the like is integrally formed by simultaneous molding after the skin contact guide 60 main body is provided with the undercut portion 62. By providing the undercut portion 62, the body 60 of the skin contact guide and the tip portion 61 are securely fixed, and it is difficult to pull them out.

As described above, since the tip end portion 61 of the skin contact guide 60 is formed of a material such as rubber having a large frictional resistance, the skin S and the skin contact guide 60 are unlikely to slip during use, and as a result, as shown in FIG. As shown, a slack portion M is formed on the outside of the skin contact guide 60, but a tension portion N is formed on the skin on the side in contact with the outer blade 21 on the inside, and a wrinkled skin portion such as an armpit is shaved. Sometimes it is possible to shave by wrinkling, which has the advantage of being able to shave short to the back of the wrinkles.

In this embodiment, the tip portion 61 of the skin contact guide 60 is formed of a material such as rubber having a large friction resistance, but on the contrary, the tip portion 61 of the skin contact guide 60 is formed of a fluororesin having a small friction resistance. It is also possible to form. This is especially traditional
It is used when wet shaving or when the blade cannot move smoothly because of poor adhesion to the skin due to sweat or the like, and in such a state, a slack portion M is generated on the skin S facing the outer blade 21, This phenomenon can be prevented because the phenomenon opposite to the state shown in FIG. 15 occurs and the slackened portion M of the skin enters the slit 23 of the outer blade 21 and causes irritation.

The parts other than the above are common to those of the second embodiment.
The same parts are given the same numbers and their explanations are omitted.

 Next, a seventh embodiment will be described with reference to FIG.

In this embodiment, the outer blade frame 5 and the skin contact guide 8 in the first embodiment are integrally formed to form a skin contact guide / outer blade frame 70. Like the outer cutter frame 5 of the first embodiment, it is provided with a scissor part 71 for scissoring the outer cutter 1 and a screw part 72 for attaching to a blade mount (not shown). Note that 73
Is a skin contact guide part.

By thus integrating the outer blade frame and the skin contact guide, there are advantages that the number of parts is reduced and the accuracy of the outer blade 1 and the skin contact guide portion 73 after assembly is improved.

Since the other parts than the above are common to the first embodiment,
The same parts are given the same numbers and their explanations are omitted.

Next, an eighth embodiment will be described with reference to FIGS. 17 and 18.

This embodiment is the same as the skin contact guide of the fourth embodiment.
The comb rib 82 of the comb portion 81 formed at the tip of the comb rib 82 is extended outward in the radial direction, and the radial length B of the extended comb rib 82 is longer than the radial length A of the bottom of the comb groove 83. It was done.

As described above, when the radial length B of the comb rib 82 is set to be considerably longer than that in the fourth embodiment, the contact area with the skin is increased and the contact with the skin is better than in the fourth embodiment.
Although 83 is formed on the skin contact guide 80, the same good skin contact as in the first embodiment can be obtained.

Since the other parts than the above are common to the first embodiment,
The same parts are given the same numbers and their explanations are omitted.

Next, the ninth embodiment will be described with reference to FIGS. 19 and 20.

This embodiment is the same as the skin contact guide of the eighth embodiment.
The comb portion 91 formed at the tip is composed of a comb rib 92 extending to the length B and a comb rib 93 having a normal length A and not extending, and the extended comb rib 92.
Are arranged through the comb groove 94 at every one or plural (every one in the drawing).

By disposing the comb ribs having a reduced radial length in this way, the width of the hair inlet is only equal to the width C of the comb groove in the eighth embodiment and the like, but in this embodiment it is apparent. There is an advantage that the upper width D becomes wider and hair is introduced more easily than in the eighth embodiment.

Since the other parts than the above are common to the first embodiment,
The same parts are given the same numbers and their explanations are omitted.

Next, a tenth embodiment will be described with reference to FIGS. 21 to 23.

In this embodiment shown in FIGS. 21 and 22, the skin contact guide in the fourth embodiment is set to 65, and the bottom surface 68 of the comb groove 67 of the comb portion 66 formed at the tip of the guide is set to the inner peripheral side. It is formed on the inclined surface that descends from the outer peripheral side. 69
Is a comb rib.

In FIG. 23, the bottom surface 78 of the comb groove of the comb portion 76 formed at the tip of the skin contact guide 75 is formed as an inclined surface descending from the inner peripheral side to the outer peripheral side.

Thus, the bottom surface of the comb groove of the comb portion is formed into the inclined surface descending from the inner peripheral side to the outer peripheral side, so that the gap K is formed.
This is to make it easier to discharge the dust collected between the gaps to the outside along the inclined surface of the bottom of the comb groove.

The parts other than the above are common to those of the first or second embodiment, and the common parts are denoted by the same reference numerals and the description thereof is omitted.

 Next, the eleventh embodiment will be described with reference to FIG.

In this embodiment, the skin contact guide in the first embodiment is 85
And, the shape of the tip is formed into a convex curved surface 86 made of an arc whose cross section has a radius of about 0.2 to 0.5 mm. The center is formed on the concave curved surface 87 located in the direction of the outer peripheral edge 88 of the flat portion 24 formed on the outer blade 21.

In this way, two kinds of curved surfaces 86, 87 are attached to the tip of the skin contact guide.
As a result, the convex curved surface 86 improves the contact with the skin during contact, and the concave curved surface 87 has long bristles introduced into the gap K as shown in FIG. 4 showing the operation of the first embodiment. This will increase the free space and make it easier to introduce hair.

Since the other parts than the above are common to the first embodiment,
The same parts are given the same numbers and their explanations are omitted.

(Effect of the invention) As described above, according to the present invention, a rotary electric shaver blade is provided with a flat portion having a slit-shaped blade hole on the outer periphery of a dome-shaped net blade to form an outer blade. With an annular skin contact guide that is approximately flush with the flat part of the outer blade through the outer circumference of the outer edge of the outer blade, the effect of introducing long hair is excellent, and it is easy to feel an axillary stimulus. There is little irritation to the skin, and it has the effect of improving the skin contact.

In addition, since the skin is sufficiently stretched and raised, the hair is short and the shaving can be performed without leaving any shaving.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front sectional view thereof, FIG. 2 is a top view thereof, FIG. 3 is a half sectional view thereof, and FIG. FIG. 5 is a half sectional view of an essential portion of the second embodiment, FIG. 5 is a half sectional view of an essential portion of the third embodiment, FIG. Through FIG. 11 show a fourth embodiment, FIG. 8 is a top view thereof, FIG. 9 is a half sectional view of an essential part thereof, FIG. 10 is a perspective view of the essential part thereof, and FIG. A state diagram, FIG. 12 is a use state diagram of the fifth embodiment, and FIG. 13 is a perspective view of its main part.
FIG. 14 is a half sectional view of an essential part of the sixth embodiment, FIG. 15 is a usage state diagram of the same, and FIG. 16 is a half sectional view of an essential part of the seventh embodiment.
FIG. 17 is a half sectional view of an essential part of the eighth embodiment, FIG. 18 is a perspective view of the same part, and FIG. 19 is a top view of the ninth embodiment.
Similarly, the figure is a perspective view of the main part, and FIGS.
Fig. 21 is a half sectional view of the main part
Figure 22 is a perspective view of the main part, and Figure 23 is a half sectional view of the main part.
FIG. 24 is a half sectional view of an essential part of the eleventh embodiment, FIG. 25 is a sectional view of a conventional example, FIG. 26 is a usage state diagram thereof, and FIGS. 27 to 31 are other conventional examples. FIG. 27 is a perspective view of the main part, FIG. 28 is a top view thereof, FIG. 29 is a sectional view thereof, and FIG.
The figure is a cross-sectional view of the main part thereof, and FIG. 1,1 ′, 1 ″ …… Outer blade, 2 …… Net blade, 3 …… Blade hole, 4
…… Flat part, 5 …… Outer blade frame, 6 …… Housing, 7 …… Blade mount, 8 …… Skin contact guide, 8 ′ …… Skin pressing part, 8 ″ …… Skin stretching ring, 9 ... … Push-up spring, 11… Inner blade, 12… Inner blade frame, 13… Joint, 14
…… Motor, 15,15 ′ …… Solid slit part, 21 …… Outer blade, 22 …… Net blade, 23 …… Slit, 24 …… Flat part, 25,25 ′ …… Outer blade frame, 26 …… Recesses, 27 ... Cover, 28 ... Skin contact guide, 29 ... Push-up spring, 30 ... Inner peripheral inner blade, 31 ... Outer peripheral inner blade, 32 ... Inner blade frame, 33 ...
Rib, 34 …… Flange rib, 35 …… Slit part, 36
...... Skin contact guide, 37 ...... Skin contact guide engagement boss, 38 ...
… Upper fitting groove, 39 …… Lower fitting groove, 40 …… Skin contact guide, 41 …… Comb groove, 42 …… Comb rib, 43 …… Comb part, 44 …… Outer blade, 50 …… Skin contact Guide, 51 …… Comb part, 52 …… Comb rib, 53 …… Lower comb rib, 54 ……
Comb groove, 60 …… Skin contact guide, 61 …… Tip, 62 ……
Undercut part, 65 …… Skin contact guide, 66 …… Comb part, 67 …… Comb groove, 68 …… Bottom surface, 69 …… Comb rib,
70 …… Skin contact guide / outer blade frame, 71 …… Scissors part, 72
…… Screw part, 73 …… Skin contact guide part, 75 …… Skin contact guide, 76 …… Comb part, 78 …… Bottom surface, 80 …… Skin contact guide, 81 …… Comb part, 82 …… Comb rib, 83 …… Comb groove, 85 …… Skin contact guide, 86 …… Curved surface, 87 …… Curved surface, 88
…… Outer peripheral edge, 90 …… Skin contact guide, 91 …… Comb part,
92 ... comb rib, 93 ... comb rib, 94 ... comb groove, A, B ... radial length, C, D ... width, F ... distance, G ...
… Gap, H …… hair, J …… contact point, K …… gap, M ……
Slack part, N ... taut part, S ... skin, T ... step,
U: gap, V: step,

Claims (11)

[Claims] 1. An outer blade having a flat portion having a slit-shaped blade hole on the outer periphery of a dome-shaped net blade, and an outer surface of the outer blade with a gap therebetween and substantially a surface of the flat portion of the outer blade. A rotary electric razor blade characterized by having an annular skin contact guide configured at one height. 2. A recess is formed in a boundary portion between the net blade of the outer blade and the flat portion, and a slit-shaped blade hole in the flat portion is continuously formed from the recess to the outer peripheral rising portion of the flat portion. A rotary electric razor blade according to claim 1. 3. The rotary electric razor blade according to claim 1, wherein the height of the skin contact guide can be adjusted in two or more steps. 4. A comb contact portion is formed in a skin contact guide, and a comb groove of this comb portion and a slit-shaped blade hole of the flat portion are arranged on the same line.
A rotary electric razor blade as described in the item. 5. The rotary electric shaver blade according to claim 4, wherein comb ribs having a height lower than the height of the flat portion of the outer blade are arranged in the comb portion at an appropriate interval. 6. A blade for a rotary electric razor according to claim 1, wherein the tip of the skin contact guide is made of a non-slip material such as rubber. 7. A blade for a rotary electric shaver according to claim 1, wherein the tip of the skin contact guide is formed of a slippery material such as fluororesin. 8. A blade for a rotary electric shaver according to claim 1, wherein the outer blade frame for mounting the outer blade and the skin contact guide are made of the same member. 9. The blade of a rotary electric shaver according to claim 4, wherein the tip of the comb rib of the comb portion is formed to extend in the radial direction away from the center of the outer blade. 10. The bottom of the comb groove of the comb portion is formed lower than the outer cutter frame surface which is the bottom of the gap between the outer cutter and the skin contact guide, and the bottom is inclined in a direction away from the center of the outer cutter. The blade of the rotary electric razor according to claim 4, characterized in that 11. The skin contact guide has a tip end portion formed into a convex curved surface having an arcuate cross section, and an inner peripheral side of the convex curved surface is formed into a concave curved surface having an arcuate cross section. The blade of the rotary electric razor according to item 1.