JP2781128B2 - Replacement blade unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replacement blade unit provided with a guard for contacting the face or the like facing the blade edge of a blade body, and to an improvement of the guard and the blade edge.

[0002]

2. Description of the Related Art Conventionally, this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 4-112377. This razor has a head for mounting a razor blade, and a guard having a beard through hole for exposing the blade edge of the razor blade is mounted on the head. A large number of high-strength fine lines pressed against the face by the razor blade edge at the time of shaving have a predetermined distance in the length direction of the razor blade at right angles to the razor blade edge. In a plane.

Another razor disclosed in the publication has a head for attaching a razor blade, and a guard is attached to the head. A large number of long holes in a direction perpendicular to the blade edge are formed in parallel with each other via a narrow band-shaped portion on the inclined portion covering the vicinity of the blade edge of the razor blade of the guard.

[0004]

However, in a conventional razor having a thin wire, there is no means for urging the thin wire to the razor blade side, so the thin wire is loosened and hinders shaving. There is. Furthermore, a gap may be formed between the razor blade and the fine wire, and after shaving, shavings may accumulate between the razor blade and the fine wire. Further, in a conventional razor having a guard provided with a long hole, shavings may accumulate between the razor blade and the guard for the same reason, and the shaving taste may decrease.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a replacement blade unit that does not cause slack in a guard and that does not collect shavings between the edge of the razor blade and the guard.

[0006]

In order to solve the above-mentioned problems, in the present invention, a razor blade and a guard provided so as to cover the cutting edge of the razor blade and having a beard through hole for inserting a beard are provided.
In the replacement blade unit, which is sandwiched in cooperation with a cap and a blade base, the guard presses at least one of the front part and the rear part of the guard so that the guard always comes into contact with the cutting edge of the razor blade in a tensioned state. The gist is that the part is provided on the cap or the blade base.

[0007]

[Action] In replacement blade unit of the present invention configured as described above, the press at least one of the front or rear of the pressing portion provided on the cap or blade base guard
By pressing the guard, the guard always comes into contact with the blade of the razor blade under tension.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a replacement blade unit will be described below with reference to FIGS.

In the first embodiment, a net 5 as a guard is provided.
A conventional two-blade safety razor replacement blade unit J except for the support structure of the net body 5. As shown in FIG. 2, the replacement blade unit J includes a cap 1, a razor blade 2, a blade base 3, and a net 5.

The cap 1 is formed of a synthetic resin in a rectangular frame 7 having an opening 4 for exposing the two razor blades 2. A front portion extending in the longitudinal direction of the frame 7 is a guide portion 8, which touches the skin when shaving and guides the replacement blade unit J. As shown in FIG. 3, a stainless steel net 5 is fixed inside the cap 1. In a portion of the net 5 which comes into contact with the opening 4 of the cap 1, a plurality of beard through holes 10 for inserting a beard are provided so as to leave many thin wires 9 in a direction orthogonal to the longitudinal direction of the cap 1. Have been. The beard through hole 10 is provided so that the beard penetrates the hole 10 and enters the opening 4 when shaving.

On the inner surface 8a of the guide portion 8, a plurality of engaging projections 11 for engaging the front side portion 13 of the net 5 are provided at predetermined intervals. In addition, caulking pins 6 are provided upright on the lower surface of the frame 7 at predetermined intervals to fix the rear side portion 14 of the net 5 to the inside of the cap 1.

A plurality of hook holes 12 are formed in the front portion 13 of the net 5 at predetermined intervals. The hooking projection 11 is penetrated and locked to the hooking hole 12.
Also, a plurality of first holes 1 are provided in the rear side portion 14 of the net body 5.
5 are provided at a predetermined interval, and the caulking pin 6 penetrates the same hole 15 and is tightly fitted.

As shown in FIG. 1, a cap 5
Is fixed, a pair of upper and lower razor blades 2 are stacked inside the cap 1 via a spacer 20. The blade base 3 is formed of a synthetic resin and is laminated on the lower razor blade 2. As shown in FIG. 2, the pressing portion 16 is formed in a square column shape at a predetermined interval on the front side of the blade base 3. The front side of the blade base 3 adjacent to the pressing portion 16 is recessed inward, and the front side surface of the pressing portion 16 is located forward of the adjacent concave portion. Therefore,
In particular, in the upper part of the pressing portion 16, the front side portion 13 of the net 5
Is pressed.

As shown in FIG. 2, the second hole 1 is formed in the upper surface 23 of the blade base 3 which comes into contact with the soft body 5 inside the cap 1.
9 are provided. Then, as shown in FIG. 1, the caulking pin 6 is connected to the second hole 1 of the blade base 3 through the pair of razor blades 2.
As a result, the two razor blades 2 and the blade base 3 are caulked on the inner surface of the cap 1 by being penetrated by the crimp 9. The cutting edge 2a of the upper and lower razor blades 2 is a line P connecting the guide surface on the upper surface of the guide portion 8 and the upper surface of the rear portion of the cap 1.
It is arranged so as to be located substantially above. With this blade base 3 attached to the cap 1, the front side 13 of the net 5 attached to the inside of the cap 1 is pressed in the direction of arrow A by the pressing portion 16. Then, as shown in FIG. 1, the net 5 above the pressing portion 16 is indicated by an arrow B.
By being pulled in the direction of tension in the direction, slack is eliminated, and no gap is formed between the cutting edge 2a and the net body 5.

Therefore, if the beard is shaved by the replacement blade unit J of the present embodiment, no gap is formed between the cutting edge 2a and the net 5 so that no shavings remain between the cutting edge 2a and the net 5.
Shaving taste does not fall.

Next, a replacement blade unit K according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 7 focusing on differences from the first embodiment. The same or corresponding components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 4, a plurality of pulling projections 21 are formed on the lower surface of the cap 28 on the rear side of the caulking pin 6 of the cap 28, as shown in FIG. At the rear side of the net 32, a loose fitting hole 22 extends in a direction orthogonal to the longitudinal direction of the cap 28, and the pulling projection 21 penetrates. The position of the loose fitting hole 22 and the pulling protrusion 21 is set at the rear end of the loose fitting hole 22 so that the pulling protrusion 21 is pressed and locked in the direction of arrow E in FIG. The rear side portion 14 of the net body 32 is formed by the caulking pin 6 of the cap 28 and the pulling protrusion 21 respectively.
9. It is fixed to the cap 28 by passing through the loose fitting hole 22.

On the other hand, the front side portion 13 of the net 32 is fixed by the hooking projection 24 being locked through the hooking hole 25. Note that the hooking projection 24 is provided slightly larger than the hooking projection 11 of the first embodiment, and the front side 1
3 is provided so as not to easily come off in the direction of arrow F. The first hole 29 through which the caulking pin 6 penetrates is slightly extended from the first hole 15 of the first embodiment in a direction perpendicular to the longitudinal direction of the net 32. In this embodiment, the pressing portion 16 on the front side of the first embodiment is omitted.
That is, the height of the upper part of the quadrangular prism-shaped part is lower than the pressing part 16 of the first embodiment.

Then, as shown in FIG.
Is passed through the second hole 19 of the blade base 33 via the pair of razor blades 2, and the two razor blades 2 and the blade base 33 are fixed by caulking inside the cap 28. The loose fitting hole 22 of the net 32 is penetrated by the pulling projection 21 and is locked by the pulling projection 21 so as to be pressed in the direction E of FIG. The caulking pin 6 is loosely fitted in the first hole 29 of the net 32. And net 3
The rear side portion 2 is slidable in a direction orthogonal to the longitudinal direction of the blade base 33. Then, since the pulling projection 21 is pressed in the direction of the arrow E, the net 32 is tensioned without slack, and the net 32 is brought into contact with the cutting edge 2a of the razor blade 2 and the razor blade 2 No gap is formed between the cutting edge 2a and the net 32.

Therefore, if the beard is shaved by the replacement blade unit K of this embodiment, the net 32 does not loosen, no shavings are collected between the cutting edge 2a and the net 32, and the shaving taste does not deteriorate.

Next, a replacement blade unit L according to a third embodiment of the present invention will be described with reference to FIGS. The same or corresponding components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 8, the cap 3 of this embodiment
0 of the projection 26 is the cap 1 in the first embodiment.
Are provided slightly larger than the hooking projections 11. Further, first slits 34 for locking the latching projections 26 are cut in the longitudinal direction at both ends of the front side portion 13 of the net body 31. Also, the back side portion 14 of the net 31
A second slit 35 for locking the caulking pin 6 at both ends of
Are formed. And the first slit 3
4, hooking projection 26, second slit 35, caulking pin 6
Is positioned such that the first slit 34 and the engaging projection 26 are engaged, and the second slit 35 and the caulking pin 6 are engaged, so that the net 31 is in a stretched state. I have.

The net 31 is fixed by the caulking pin 6 and the engaging projection 26 being engaged with the second slit 35, the first hole 15, and the first slit 34, respectively. . Then, as shown in FIG. 9, the caulking pin 6 is moved through the pair of razor blades 2 into the second holes 19 of the blade base 33.
The razor blade 2 and the blade base 33 are
It is caulked and fixed inside 0.

When the caulking pin 6 presses and locks the first hole 15 and the rear end of the second slit 35, the net 31 is pulled in the directions of arrows D and G, and the cutting edge 2a of the razor blade 2 is cut. The abutment 31 is in contact with the body 31 without a gap. Therefore,
The net 31 does not loosen, and the cutting edge 2a of the razor blade 2 and the net 31
In between, no shavings remain.

Therefore, if the beard is shaved by the replacement blade unit L of the present embodiment, no shavings are accumulated between the cutting edge 2a and the net 31 and the shaving taste is not reduced. In addition, this invention is not limited to the said Example, In addition, the net 5,
The shape of the mustache through holes 31 and 32 may be modified. Further, a pressing portion 1 for pressing the front side portion 13 of the nets 5 and 32.
6, and a pulling projection 21 pressing the rear side portion 14 may be provided on the blade bases 3, 33 and the caps 1, 28.

In the first embodiment, a spring member or the like may be provided on the pressing portion 16 to press the net 5 in the direction of arrow A. In the above embodiment, the razor blade has two blades, but may have a single blade.

In addition, it may be arbitrarily changed without departing from the spirit of the present invention.

[0028]

As described above in detail, according to the replacement blade unit of the present invention, there is provided an excellent effect that the guard does not loosen and swarf does not accumulate between the cutting edge of the razor blade and the guard. Play.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a replacement blade unit according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the replacement blade unit.

FIG. 3 is a perspective view of the same cap as viewed from below.

FIG. 4 is a perspective view of a cap and a net according to a second embodiment of the present invention as viewed from below.

FIG. 5 is a perspective view of the blade base.

FIG. 6 is a sectional view of the replacement blade unit.

FIG. 7 is an enlarged sectional view of a pulling protrusion.

FIG. 8 is a perspective view of a cap and a net according to a third embodiment of the present invention.

FIG. 9 is a sectional view of the replacement blade unit.

[Explanation of symbols]

1, 28, 30 cap, 2 razor blade, 2a razor blade tip, 3, 33 blade stand, 5, 31, 32, net as guard, 10 opening, 16 pressing part.

Claims (1)

(57) [Claims] 1. A razor blade (2) and a guard (5, 31, 32) arranged to cover the cutting edge (2a) of the razor blade (2) and having a beard through hole (10) for inserting a beard. And the cap (1, 28, 30) and the blade base (3, 33) cooperate with each other to hold the razor blade (5, 31, 32) in a tensioned state. Guard (5, 3) so that it contacts the blade edge (2a) of 2)
A pressing portion (16) for pressing at least one of the front portion and the rear portion of the cap (1, 32) is replaced with a cap (1, 28, 3).
0) or a blade unit (3, 33).