JP3188207B2 - Guard structure of blade edge in razor head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a razor head such as a T-shaped razor, and more particularly to a guard structure for a cutting edge of a blade.

[0002]

2. Description of the Related Art In a conventional replacement blade unit disclosed in Japanese Patent Application Laid-Open No. 7-59959, as shown in FIG. The cutting edge 2a of the side razor blade 2 is crossed over the guide portion 8 and the fine wires 9 of the net 5 (see FIG. 2 of the publication) are juxtaposed along the extending direction of the lower cutting edge 2a. I have. However, the lower cutting edge 2a is provided in the space above the shavings removing hole of the blade base 3 adjacent to the guide portion 8.
Since each fine wire 9 of the mimi body 5 is present between the guide member 8 and the shavings, which should flow down smoothly into the shaving exclusion hole, there is a possibility that the fine shading will be caught on each fine wire 9 of the mimi body 5 and remain. there were.

Accordingly, the present applicant has filed a Japanese Patent Application No. Hei 7-3321.
No. 52 provides a razor head blade edge guard structure. In this blade edge guard structure, a plurality of guard bands that are bent from the upper side of the blade body so as to cross the direction in which the blade edge extends and reach the lower side of the blade body are arranged side by side along the direction in which the blade edge extends. It has two guard plates. For this reason, the shaving elimination gap facing the cutting edge between the cutting edge and the shaving guide is continuously connected in the extending direction of the cutting edge. Therefore, the shavings can surely flow down to the shaving-removing holes through the shaving-removing gaps without being caught by each guard band of the guard plate, so that the shavings can flow out smoothly.

[0004]

In each of the guard bands, particularly in the bent portion bent at the cutting edge, edges are formed on both sides thereof. Therefore, when shaving, when this edge touches the skin, the feeling becomes poor and the shaving taste may be adversely affected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a guard structure for a cutting edge, which not only allows for smooth outflow of shavings but also further improves the feel and the shaving taste.

[0006]

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 4) of the embodiments described later. In the razor head according to the invention of claim 1 of the present application, the blade base (1)
A blade base (1) that sandwiches the blade body (3, 4, 5) between the blade and the top plate (2), and exposes the cutting edges (3a, 4a, 5a) of the blade body (3, 4, 5). A shaving guide (8) and a shavings exclusion hole (10) are provided at the front edge of the cutting edge (3a, 4a, 5a). In this razor head blade edge guard structure, the blade edges (3a, 4a, 5) are arranged from above the blade body (3).
A plurality of guard bands (14) bent so as to intersect with the extension direction (P) of (a) and reach the lower side of the blade body (5) are connected to the cutting edge (3).
a, 4a, 5a), provided with one guard plate (11) juxtaposed along the extending direction (P), and the bent portion (20) of each guard band (14) bent at the cutting edge (5a). ), A plurality of projections (23) are arranged on the shaving guide (8) along the extending direction (P) of the cutting edges (3a, 4a, 5a). 23) has a projecting surface facing the surface (24) of the bent portion of each of the guard band (14) (20), before
The side surface of each convex portion (23) is the bottom surface of the projecting surface (24).
Each cutting edge (3a, 4a, 5) viewed from the protruding surface (24)
Substantially conical shape with a top in the front that is away from a)
It was formed in.

Further, in the razor head according to the present invention of claim 2, before Symbol protruding surface (24) has a width dimension (W _21, W ₂₂₎ larger width than said bent portion (20) ( W ₂₃ ).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a three-blade razor head of a T-shaped razor according to an embodiment of the present invention will be described with reference to the drawings.

<Outline of Three-Blade Razor Head> In a T-shaped razor, a three-blade razor head separated from a holder (not shown) is shown in FIGS. 1 (a), 3 (a) and 3 (b). As shown in the figure, the blade base 1, the top plate 2, the upper blade body 3, the middle blade body 4, the lower blade body 5, the upper spacer 6, and the lower spacer 7 are provided. Blade base 1
Upper blade 5, lower spacer 7, middle blade 4, and upper spacer 6
And the upper blade body 3 are sequentially placed and stacked up and down.
The blades 3, 4, 5 and both spacers 6, 7 are clamped between the blade base 1 and the top plate 2.

The cutting edges 3a, 4a, 5a of the blade bodies 3, 4, 5
Are exposed at the front edge of the blade base 1 where the blades 3a and 4 are exposed.
A shaving guide 8 is supported by each connecting portion 9 in front of the upper and lower arms 2a and 2b of the top plate 2 so as to be in front of the cutting edges 3a and 4a.
a, 5a are extended in parallel along the extension direction P, and the shaving exclusion holes 10 are provided between the connecting portions 9 so that the cutting edges 3a, 4a,
It is provided vertically below corresponding to 5a.

<Improvement of Guard Structure of Each Blade Edge 3a, 4a, 5a (1)> One guard plate 11 shown in FIG.
It is integrally formed by press forming and includes an upper holding portion 12, a lower holding portion 13, and a plurality of guard bands 14, which form a frame shape. Each guard band 14 is bridged between the upper and lower holding portions 12 and 13 and juxtaposed in the direction in which they extend, and an exclusion hole 15 for shaving between each guard band 14 and the upper and lower holding portions 12 and 13. Are formed.

The guard plate 11 is bent at the center of each guard band 14 as shown in FIGS. 3 (a), 3 (b) and 4, and is fixed to the upper side of the upper blade body 3 by the upper holding portion 12. Each of the blades 3, 4 a, 5 a intersects from the upper side thereof, reaches the lower side of the lower blade 5, and is fixed to the lower side thereof.
4 and 5 are applied. Then, with each guard band 14 in contact with each cutting edge 3a, 4a, 5a, the guard plate 1
The upper and lower holding portions 12 and 13 are held between the blade base 1 and the top plate 2. Therefore, as shown in FIG. 1 (a), the guard bands 14 are arranged side by side along the extending direction P of the cutting edges 3a, 4a, 5a, and as shown in FIGS. 3 (a) and 3 (b). A shaving surface Q connecting the shaving guide 8 and the top plate 2
Are located near the cutting edge 3a, 4a, 5a and each guard band 14.

<Regarding Exclusion Structure> FIG. 3 (a)
As shown in FIG. 4A and FIG. 4A, in the middle blade body 4 and the lower blade body 5, the exclusion holes 16 and 17 shaving near the cutting edges 4a and 5a.
Are formed. Comb recesses 6a and 7a of both upper and lower spacers 6 and 7 are located above and below the shaving exclusion hole 16 of the middle blade body 4, and comb comb recesses of the lower spacer 7 above and below the shaving exclusion hole 17 of the lower blade body 5. 7a and a shaving exclusion hole 10 of the blade base 1 are located. Upper and lower shaving waste passages 18, 19 are formed between the upper and lower spacers 6, 7 between the respective cutting edges 3a, 4a, 5a.

<Improvement (2) of guard structure of each cutting edge 3a, 4a, 5a> FIGS. 1 (a), (b) and 3 (a)
As shown in (b) and FIGS. 4 (a) and 4 (b), in the bent portion 20 of each guard band 14 bent by the cutting edge 5a of the lower blade body 5, of the front and back surfaces 21 and 22, A plurality of protrusions 23 are provided on the shaving guide 8 so as to face the surface 21.
a, 4a and 5a are juxtaposed in the extending direction P. Each of the convex portions 23 has a substantially semicircular projecting surface 24 facing the surface 21 of the bent portion 20 of each guard band 14 through the shaving exclusion gap S. The projecting surface 24 is defined as a bottom surface. At the same time, it has a substantially conical shape having a top portion in front of the protruding surface 24 (in a direction away from the cutting edges 3a, 4a, 5a). A concave portion 25 is formed in the shaving guide 8 between the convex portions 23, and each convex portion 23 projects upward from the bottom surface of each concave portion 25, and its generating line (in the shape of a cone, the outer periphery of the bottom surface and the top portion are formed). The connecting line) is higher than the shaving surface Q. As shown in FIG. 4B, the width dimension W ₂₃ (the dimension in the extending direction P of each of the cutting edges 3 a, 4 a, 5 a) of the projecting surface 24 of each of the projections 23 is determined by the surface 21 of the bent portion 20. It is slightly larger than the width dimension W ₂₁ and the width W ₂₂ of the back surface 22 (W _21,
W ₂₂ <W _23). Center line 23a of the projecting surface 24 center line 20a of the (width W line passing through an intermediate position ₂₃₎ Toko of both sides 21, 22 (line passing through the middle position in the width dimension W _21, W ₂₂₎
Are consistent with each other.

[Features of the present embodiment]
(Other than the other technical ideas described below). * In the unfolded state of the guard plate 11 shown in FIG. 2, each guard band 14 has a rectangular cross section. FIG.
As shown in (b), after the guard plate 11 is assembled, the front surface 21 of the front and back surfaces 21 and 22 of the bent portion 20 extends in the longitudinal direction, and the rear surface 22 contracts in the longitudinal direction.
Very slight dimensional difference between the width W ₂₂ of the first width dimension W ₂₁ and the back 22 occurs (W ₂₁ <W _22). Therefore, a very slight angle difference occurs between both edges 21a of the front surface 21 and both edges 22a of the back surface 22. Further, burrs may be left on the edges 21a and 22a when the guard plate 11 is pressed. In any case, it is necessary to prevent the skin from touching these edges 21a and 22a as much as possible in order to further improve the feel and shaving taste when shaving.

Therefore, the projecting surface 24 of each of the projections 23 has an opposing surface 24a facing these edges 21a and 22a.
Was formed. Therefore, each convex portion 23 has the following functions.

At the time of shaving, when the shaving guide 8 is applied to the skin, the skin gets into the recesses 25 between the projections 23, and the cutting edges 3a, 4a,
5a. However, since there are the projections 23, especially the facing surface 24a of the protruding surface 24, the skin is formed on the edge of each guard band 14, particularly the edges 21a, 2 of the bent portion 20 thereof.
2a.

In the space above the shaving exclusion hole 10 of the blade base 1 adjacent to the shaving guide 8, a guard plate 11 is provided between the cutting edge 5a of the lower blade body 5 and the shaving guide 8.
Does not exist. Therefore, between the cutting edge 5a and the shaving guide 8, the shaving exclusion gap S facing the cutting edge 5a is continuously connected along the extending direction P of the cutting edge 5a. Therefore, the beards are removed from the guard plate 11.
Without being caught by each guard band 14, it surely flows down to the shaving exclusion hole 10 through the shaving exclusion gap S, so that the shavings can flow out smoothly.

* One guard plate 11 is attached to each of the cutting edges 3a, 4
a, 5a also serves as a guard structure. Therefore, the guard plate 11 can be easily attached to each of the blade bodies 3, 4, and 5.

[Other Embodiments] In addition to the above-described embodiments, the present invention may be configured as indicated by * below. * It is considered that the following points are necessary to exhibit the function of preventing contact with the edges 21a and 22a described above.

By changing the shape of the projection 23 in the above embodiment, the projection is formed only near the protruding surface 24. Further, of the protruding surface 24, a convex portion is formed only near the opposing surface 24a. Incidentally, the “projection 23 facing the edges 21 a and 22 a” means the edge 21 a as shown in FIG.
The opposing surface 24a is set on or near a surface (a surface orthogonal to the cutting edge extension direction P passing through the edges 21a and 22a) including the extension line L from the a and 22a toward the convex portion 23. I do.

The protruding portion 23 is formed on the shaving guide 8 so as to face an arbitrary part of the bent portion 20 of each guard band 14.
Is provided. * Although not shown, the present invention is embodied as a two-blade razor head in which an upper blade body, a lower blade body, and a spacer between the upper and lower blade bodies are vertically stacked between a blade base and a top plate.

* Although not shown, the present invention is embodied in a T-shaped razor having a razor head integrated at the upper end of the holder. * Although not shown, the spacer is embodied in a razor head integrated with a blade base or a top plate.

* Although not shown, a shaving guide is provided on the top plate side. [Other technical ideas] The technical ideas (other than the claims) that can be grasped from each embodiment are described together with the effects.

(A) Two or more blade bodies 3, 4, 5 are vertically sandwiched between the blade base 1 and the top plate 2, and each blade body 3, 4,
A shaving guide 8 and a shaving exclusion hole 10 are provided at the front edge of the blade base 1 where the blade edges 3a, 4a, and 5a are exposed.
In the razor head provided corresponding to a, 4a, 5a,
A plurality of guard bands 14 are bent from the upper side of the uppermost blade body 3 so as to intersect with the extending direction P of the respective blade edges 3a, 4a, 5a and reach the lower side of the lowermost blade body 5, and each of the plurality of guard bands 14 is provided with each of the blade edges 3a, 4a, A guard plate 11 provided side by side along the extension direction P of 5a, and a bent portion 2 of each guard band 14 bent at the cutting edge 5a of the lowermost blade 5
A plurality of projections 23 are arranged on the shaving guide 8 along the extending direction P of the cutting edges 3a, 4a, 5a so as to face the edges 21a, 22a generated at 0. Guard structure. Therefore, at the time of shaving, the function of each convex portion 23 on the shaving guide 8 makes it difficult for the skin to come into contact with the edges 21 a and 22 a of the bent portion 20 of each guard band 14, and the shaving is further improved in feeling. The taste can be improved. Moreover, the shavings removal gap S facing the cutting edge 5a of the lowermost blade body 5 is connected in a series along the extending direction P of the cutting edge 5a, so that the shavings can flow out smoothly through the shavings removing hole 10. it can. Further, one guard plate 11 can be used also as a guard structure for each of the blade edges 3a, 4a, 5a, and the guard plate 1 for each of the blade bodies 3, 4, 5 can be used.
1 can be easily assembled.

(B) In the above (A), the blades 4, 5
In the vicinity of the cutting edges 4a, 5a, there are exclusion holes 16,
17 are provided, and the shaving exclusion holes 16 and 17 are formed between the shaving exclusion holes 15 between the guard bands 14 and the respective cutting edges 3a, 4a and 5
The blades 1 were communicated with the shavings removal passages 18 and 19 and the shavings removing holes 10 of the blade base 1. Therefore, the shavings include not only the shavings removing gap S, but also the shavings removing holes 15, the shavings removing passages 18 and 19, and the shavings removing holes 16 and 17.
Also, it flows down to the shavings exclusion hole 10 and the shavings can be more smoothly discharged.

[0027]

According to the razor head blade guard structure of the present invention, when shaving, the function of each projection (23) on the shaving guide (8) allows the skin to be formed on each guard band (14).
It becomes difficult to contact the edges (21a, 22a) of the bent portion (20), and the touch can be further improved to improve the shaving taste. In addition, the shaving exclusion gap (S) facing the cutting edge (5a) of the blade body (5) is connected in series along the extending direction (P) of the cutting edge (5a), and the shaving exclusion hole (1).
In 0), the outflow of the shavings can be performed smoothly. Also, one guard plate (11) is attached to the cutting edge (3a, 4).
a, 5a) can also be used as a guard structure, and the guard plate (11) can be easily attached to the blade body (3, 4, 5).

[Brief description of the drawings]

FIG. 1A is a plan view showing a razor head for a T-type razor according to the present embodiment, and FIG. 1B is a partially enlarged plan view of FIG.

FIG. 2 is a plan view showing a deployed state of the guard plate before assembly.

3A is an enlarged sectional view taken along line XX of FIG. 1A, and FIG. 3B is an enlarged sectional view taken along line YY of FIG. 1A.

4 (a) is a partially enlarged sectional view of FIG. 3 (a), and FIG. 4 (b) is a partially enlarged plan sectional view of FIG. 1 (b).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blade stand, 2 ... Top plate, 3 ... Upper blade, 3a ... Blade of upper blade, 4 ... Middle blade, 4a ... Blade of middle blade, 5 ... Lower blade, 5
a: blade edge of lower blade body, 8: shaving guide, 10: shaving exclusion hole, 11: guard plate, 14: guard band, 20: bent portion, 21a, 22a: edge, 23: convex portion, P: Extension direction of the cutting edge.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26B 21/22 B26B 21/14 B26B 21/40

Claims (2)

(57) [Claims] A blade body (3, 4, 5) is sandwiched between a blade base (1) and a top plate (2), and a blade edge (3a, 4a, In a razor head provided with a shaving guide (8) and a shaving exclusion hole (10) at the front edge of the blade base (1) where 5a) is exposed, corresponding to the cutting edges (3a, 4a, 5a). A plurality of guard bands (14) bent from the upper side of (3) so as to intersect with the extending direction (P) of the cutting edge (3a, 4a, 5a) to reach the lower side of the blade body (5) are formed into a plurality of guard bands (14). 3a, 4a, 5
a) a guard plate (11) arranged side by side along the extending direction (P) of (a), on the surface of the bent portion (20) of each guard band (14) bent at the cutting edge (5a). A plurality of protrusions (23) are arranged in opposition to the shaving guide (8) along the extending direction (P) of the cutting edge (3a, 4a, 5a), and each of the protrusions (23) Each guard band (14) has a protruding surface (24) facing the surface of the bent portion (20), and the side surface of each of the protruding portions (23) is formed on the bottom of the protruding surface (24).
And each cutting edge (3a, 4a,
5a) substantially conical with a top in the front away from
A razor head guard structure for a cutting edge, wherein the razor head is formed in a shape . 2. A pre-Symbol protruding surface (24), said bent portion (2
Edge guard structure of the razor <br/> sword head according to claim 1, characterized in that it has a larger width than (W ₂₃₎ width (W _21, W ₂₂₎ of 0).