JPS62600Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a T-shaped razor with an obliquely moving blade.

Prior Art Conventionally, T-type razors perform shaving operations by applying the blade body to the skin surface and moving it vertically in a direction perpendicular to the blade tip. Therefore, the shaving motion is like stroking the unevenness of the skin surface in one direction, and it is difficult to shave off the beards on the skin surface from the root in one shaving motion, and many beards are left unshaved. Not only that, but because the blade is a so-called push cut, which cuts by pressing against the beard, it has the disadvantage of giving a bad shave.

Therefore, as shown in Utility Model Application No. 57-199781, the blade attachment part can be moved back and forth with respect to the holder in a direction that is tilted up and down with respect to the extending direction of the cutting edge of the blade, that is, a surface that extends in the horizontal direction. A razor has been developed that can improve the shaving quality by providing support. Normally, with a razor, the blade is clamped between the blade holder and the top plate, and the cutting edge of the blade protrudes very slightly from the shaving tangent plane connecting the top plate and the guard at the front end of the blade holder. Now I can shave my beard. When shaving, the skin surface is supported at two points, the top plate and the guard of the blade stand, and the shaving operation is performed along the shaving tangential plane between these two points. However, in the razor described in Utility Model Application No. 57-199781, when the oblique blade protrudes from the shaving tangent surface toward the skin surface during its reciprocating movement,
The edge of the blade would cut into the skin and move diagonally, posing a high risk of cutting the skin.

Purpose The purpose of the present invention is to not only improve the taste of shaving, but also to avoid cutting the skin when shaving by specifying the oblique direction of the blade in relation to the shaving tangent plane. Our goal is to provide a razor that can eliminate sex.

Structure of the Invention In order to achieve this objective, the present invention provides a blade attachment part to a holder in a direction that is inclined up and down with respect to the extending direction of the cutting edge of the blade body, that is, a plane extending in the left and right direction, and also connects the top plate and the blade rest. It is supported so that it can move in a substantially parallel direction along the shaving tangential plane connecting it to the guard at the front end.
The holder has a built-in drive device for reciprocating the blade mounting portion in the inclination direction by a distance of at least approximately 1 mm.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.As shown in FIG. , a motor housing cylinder 4 screwed onto the upper end of this switch housing cylinder 3 , and a rail mounting part 5 screwed onto the upper end of this motor housing cylinder 4 .
As shown in FIG.
a is formed, and a rail portion 6 having a U-shaped cross section shown in FIG. 3 is fitted into the rail mounting portion 5 facing the opening portion 5a. As shown in FIG.
(approximately 10 degrees).

As shown in FIG. 2, the head 7 as a blade attachment part has a support member 8 shown in FIG.
A replaceable blade cartridge 9 is detachably supported with a fitting groove 9a to a guide rail 8a formed at the front end of the support member 8, and a guide block 10 formed at the rear of the support member 8 The guide groove 6a is fitted into the guide groove 6a. In this spare blade cartridge 9, a lower blade body 12 is placed on the blade stand 11,
The spacer 13 and the upper blade body 14 are sequentially overlapped,
These are the top plate 15 superimposed on the upper blade body 14.
and the blade base 11, and the lower blade body 12
A dregs removal plate 16 is interposed between the upper blade body 14 and the upper blade body 14. The cutting edges 14a, 12a of the upper and lower blade bodies 14, 12 are connected to the top of the top plate 15 and the blade rest 11.
It protrudes very slightly from the shaving tangent plane P that connects it to the guard 11a at the front end. And head 7
A direction in which the entire blade body 12, 14 of the blade cartridge 9 has a direction in which the cutting edges 12a, 14a of the blade bodies 12, 14 extend, that is, a direction that is vertically inclined with respect to a plane A that extends in the left-right direction, and a direction that is substantially parallel to the shaving tangent plane P. It is supported on the rail part 6 so that it can move back and forth to B.

As shown in FIG. 1, a motor 17 and a reduction gear head 18 are housed in the motor housing cylinder 4, and as shown in FIG.
A rotary shaft 19 of 8 is projected into the rail mounting portion 5 through the waterproof shield 20. A rotating member 21 having an eccentric shaft portion 22 is fixed to the rotating shaft 19, and the tip end of the eccentric shaft portion 22 passes through a notch 23 formed on the rear side of the rail portion 6, as shown in FIG. The support member 8 is engaged in an engagement recess 24 formed on the rear side of the guide block 10.

As shown in FIG. 1, a dry battery 25 is housed in the dry battery housing tube 2 by removing a lid 2a screwed to the lower end thereof, and a switch 26 housed in the switch housing tube 3 is housed therein. The dry cell battery 25 and the motor 17 are electrically connected via the battery 25 and the motor 17. The motor 17, the reduction gear head 18, and the rotating member 21 constitute a driving device.

Now, as shown in Figure 5, replaceable blade cartridge 9
When the motor 17 is rotated by applying it to the skin surface and turning on the switch 26, the decelerated rotation shaft 1
The rotating member 21 rotates via the shaft 9, and its eccentric shaft portion 22 swings. And, due to that oscillation, the fourth
As shown in the figure, the guide block 10 of the support member 8
The blades 12 and 14 reciprocate along the guide groove 6a of the rail portion 6, and the blade bodies 12 and 14 move obliquely in the above-mentioned inclination direction B, as shown in FIGS. In this example,
The oblique angle θ is approximately 10 degrees, the reciprocating distance is approximately 2 mm,
The number of reciprocating strokes is approximately 2500 times per minute. The setting ranges for the skew angle, reciprocating distance, and reciprocating stroke number are 1 to 80 degrees and 1 to 10 degrees, respectively.
mm, about 100 to 5000 times. Furthermore, when the reciprocating distance is increased, the number of reciprocating strokes must be reduced for safety reasons.

In a conventional razor, as the blade is used to shave from top to bottom, the beard is pushed downward, and the blade works to bite into the root of the beard, creating a so-called push cut. However, at this time, it was common for unshaved areas to appear on the skin surface. As a result, he had to shave the same area over and over again. Therefore, a razor whose performance is further improved by applying slight vibrations to the blade body for pulling and cutting is being considered.

By the way, in the pull cutting, when cutting the beard M with the blade bodies 12 and 14 as shown in FIG.
The blade body 12, which is formed by the contact trajectory between the blade body 12 and the blade body 14,
The cross section of 14 is as shown in FIG. 8, and the cutting edge angle α2 of the cross section is always smaller than the cutting edge angle α1 during push cutting shown in FIG. Therefore, the cutting edge angle α2 due to cutting becomes even sharper, and the effect is great.

Normally, the cross section of whisker M generally has a short axis of 0.125 mm.
It has an elliptical shape with a major axis of about 0.17 mm. Therefore, the 9th
As shown in the figure, assuming that the cross section of the whisker M is circular with a diameter d, the required reciprocating distance S when the oblique angle is θ is (d×1/tanθ). Substituting d=0.17mm and θ=10 degrees into this equation, S=
It becomes 0.964mm. That is, in order to completely pull and cut the beard M with this thread, the reciprocating distance S needs to be at least approximately 1 mm. Incidentally, if the skew angle θ is made larger than 10 degrees, S becomes smaller, but if θ is made too large, it is not preferable in terms of safety. Conversely, if θ is made smaller than 10 degrees, S
It is necessary to increase θ, but if θ is made too small, the shaving quality will be poor.

For the reasons mentioned above, if the blade vibrates only slightly as in the past, a sufficient cutting effect cannot be expected even if it is somewhat effective.

However, in this embodiment, since the blades 12 and 14 have a sufficient reciprocating distance, even assuming various conditions, it is possible to perform not only push-cut cutting but also pull-cut cutting more reliably than in the case of slight vibration. This will improve the quality of your shave even more. It was considered that this reciprocating distance should be at least approximately 1 mm for the reasons mentioned above.

Moreover, the blade bodies 12 and 14 are connected to the top plate 15 and the blade base 11.
Since the blades 12 and 14 reciprocate in a substantially parallel direction B along the shaving tangential plane P that connects the blade to the guard 11a, the reciprocating movement prevents the blades 12 and 14 from digging into the skin surface excessively, thereby increasing safety. will further improve.

Further, the guide groove 6a of the rail portion 6 is arranged in a direction that is vertically inclined with respect to the plane A extending in the direction in which the cutting edges 12a and 14a of the blade bodies 12 and 14 of the head 7 extend, that is, in the left-right direction, and in the shaving tangent plane P. Since the blades 12 and 14 extend in a direction B that is substantially parallel to the blades, reciprocating movements of the blade bodies 12 and 14 in the left-right and up-down directions can be simultaneously provided with a simple structure. This blade 12,
Regarding the reciprocating direction of blade 14, the blade bodies 12, 14
If it does not protrude from the shaving tangent plane P towards the skin surface during reciprocating movement, it does not necessarily need to be parallel to the shaving tangential plane P, but slightly backward from the shaving tangential plane P. It may also be configured to reciprocate in the direction away from the skin surface.

Note that it is also possible to reciprocate only the blade mounting portion that supports the blade inside the head fixed to the hotter, or to apply it to a single-blade safety razor.

Effects According to the present invention detailed above, the blade bodies 12, 14
is vertically inclined with respect to the extending direction of the cutting edges 12a, 14a, that is, the plane A extending in the left-right direction, and is substantially parallel to the shaving tangent plane P connecting the top plate 15 and the guard 11a of the blade rest 11. Since it moves back and forth in direction B with a movement distance of approximately 1 mm,
It is possible to reliably perform not only push-cutting but also pull-cutting of the beard, which not only further improves the shaving quality, but also the blade bodies 12, 1.
No. 4 does not dig into the skin surface too much, which has the effect of further improving safety.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a razor that is an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view showing the head portion of the razor.
Fig. 3 is a partially exploded perspective view showing the support member of the head, the rail part and rotating member on the holder side, Fig. 4 is a sectional view taken along the line X-X of Fig. 2, and Figs. 5 and 6 are shaving tangents. An action explanatory diagram showing the reciprocating direction of the blade with respect to a surface, FIG. 7 is a partial perspective view showing the pulling and cutting action of the blade, and FIG. 8 is a cross-sectional view of the blade formed by the contact locus between the whisker and the blade. , FIG. 9 is an explanatory diagram showing the relationship between the reciprocating distance, the oblique angle, and the cross-sectional diameter of the whiskers. Holder 1, rail attachment part 5, rail part 6, head (blade body attachment part) 7, guide block 10, blade stand 11, guard 11a, lower blade body 12, upper blade body 14,
Top plate 15, motor 17, reduction gear head 18,
Rotating shaft 19, rotating member 21, eccentric shaft portion 22, notch portion 23, engagement recess 24, dry battery 25, switch 2
6. Shaving tangent plane P.

Claims (1)

[Claims for Utility Model Registration] 1. The blade attachment part 7 is attached to the holder 1, and the blade 12,
The guard 11 at the front end of the top plate 15 and the blade rest 11 is inclined upwardly and downwardly with respect to the plane A extending in the extending direction of the cutting edges 12a and 14a, that is, in the left-right direction.
A drive for reciprocating the blade mounting portion 7 in the inclined direction B with a movement distance of at least approximately 1 mm. A razor equipped with an oblique blade body, characterized in that a device is built into a holder 1. 2 The blade attachment part 7 is a rail part 6 provided on the holder 1
A razor equipped with an oblique blade as claimed in claim 1 of the registered utility model. 3 The rail portion 6 is attached to the blades 12 and 14 of the blade mounting portion 7.
It has a guide groove 6a that extends in a direction that is vertically inclined with respect to a plane A that extends in the direction in which the blade edges 12a and 14a extend, that is, in the left-right direction, and in a direction B that is substantially parallel to the shaving tangential plane P. Part 7
A razor equipped with an oblique blade according to claim 2, which is movably supported along the guide groove 6a. 4 The drive device includes a motor 17 and a reduction gearhead 1
8 and a rotating member 21 fixed to the rotating shaft 19 of this reduction gear head 18.
1. A razor equipped with an oblique blade according to claim 1, wherein the eccentric shaft portion 22 formed in the blade attachment portion 7 is engaged with the engagement recess 4 formed in the blade attachment portion 7.