JPH09308779A - Blade tip structure in three-bladed razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cutting quality of razor and soften the touch. SOLUTION: Respective blade bodies 4, 5, 6 are sandwiched between a blade rest 2 and a top plate 3 and tip parts 14, 15, 16 of the respective blade bodies 4, 5, 6 are arranged between a guide part 10 of the blade rest 2 and a holding part 13 of the top plate 3. A datum plane P which passes through a middle blade body point edge 15a and is in contact with the guide part 10 is supposed and a projecting distance of the bottom blade body point edge 14a in relation to this datum plane P is set to A. A datum plane Q which passes through the top blade body point edge 16a and the bottom blade body point edge 14a is supposed and the projecting distance of the middle blade body point edge 15a in relation to this datum plane Q is set to B. A datum plane R which passes through the middle blade body point edge 15a and is in contact with the holding part 13 is supposed and the projecting distance of the top blade point edge 16a in relation to the datum plate R is set to C. In this case, the relation, A>B>C, A=B>C, or A>B=C is satisfied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the protrusion distance of the blade tip of each blade of a three-bladed razor.

[0002]

2. Description of the Related Art As a so-called T-type razor in which a razor head is supported on an upper end portion of a holder, there are known one-blade type, two-blade type and three-blade type razors. Has been. In these T-shaped razors, the protrusion distance of the blade tip of the blade affects the maintenance of sharpness and the soft feel. Therefore, in particular, we focused on a three-bladed razor that is excellent in maintaining sharpness and softness of touch, and made improvements for the purpose of further improving sharpness and softness when using it. .

[0003]

The present invention will be described with reference to the reference numerals in the drawings (FIG. 1) of the following embodiments. The three-bladed razor according to the present invention is configured as follows.

The lower blade body (4), the middle blade body (5) and the upper blade body (6) are sandwiched between the blade base (2) and the top plate (3), and the blade base (2) Each blade (4, 5, 6) is provided between the guide part (10) on the front side and the sandwiching part (13) on the front side of the top plate (3).
The blade edges (14, 15, 16) of are arranged in parallel.

[0005] It passes through the sharp edge (15a) of the cutting edge portion (15) of the middle blade body (5) and the guide portion (1) of the blade base (2).
0) Assuming a lower blade shaving reference plane (P) in contact with the upper blade, a sharp edge (14a) of the cutting edge portion (14) of the lower blade (4) with respect to the lower blade shaving reference plane (P). Let (A) be the protrusion distance of.

[0006] The blade edge portion (1) of the lower blade body (4) passes through the sharp edge (16a) of the blade edge portion (16) of the upper blade body (6).
4) Assuming a medium blade shaving reference plane (Q) passing through the sharp edge (14a) of 4), the blade tip portion (15) of the intermediate blade (5) with respect to this medium blade shaving reference plane (Q). Edge (1
The protrusion distance of 5a) is (B).

[0007] It passes through the pointed edge (15a) of the cutting edge portion (15) of the middle blade body (5) and the holding portion (1) of the top plate (3).
3) Assuming an upper blade shaving reference plane (R) in contact with the upper blade, the tip edge (16a) of the cutting edge portion (16) of the upper blade (6) with respect to the upper blade shaving reference plane (R). Let (C) be the protrusion distance of.

In this case, the following relationship 1), 2) or 3) is satisfied. 1) Lower blade protruding distance (A)> Middle blade protruding distance (B)> Upper blade protruding distance (C) 2) Lower blade protruding distance (A) = Middle blade protruding distance (B)> Upper blade Body protrusion distance (C) 3) Lower blade protrusion distance (A)> Medium blade protrusion distance (B) = Upper blade protrusion distance (C)

[0009]

DETAILED DESCRIPTION OF THE INVENTION A three-blade razor according to one embodiment of the present invention will be described below with reference to FIG. (Schematic structure of three-blade razor) In this razor, the razor head 1 is detachably supported on the upper end of a holder (not shown). This razor head 1 has a blade base 2 and a top plate 3.
And a lower blade body 4, a middle blade body 5, an upper blade body 6, a lower spacer 7 and an upper spacer 8.

In the blade base 2, a guide portion 10 is formed on the front side of the mounting base portion 9 through a whiskers removing hole 11. On the top plate 3, a caulking pin 12 is provided so as to project from the lower side thereof, and a holding portion 13 is formed on the front side of the caulking pin 12.

The lower blade body 4, the lower spacer 7, the middle blade body 5, the upper spacer 8 and the upper blade body 6 are sequentially placed on the mounting base portion 9 of the blade base 2 and superposed, and the top plate 3 is placed on them. No crimp pin 1
2 is inserted into each blade 4, 5, 6 and each spacer 7, 8
Is sandwiched between the mounting table portion 9 and the top plate 3.

Edge portions 14, 15, 1 of the blade bodies 4, 5, 6
The spacers 6 are arranged in parallel between the guide portion 10 of the blade base 2 and the sandwiching portion 13 of the top plate 3 with a predetermined space provided by the spacers 7 and 8. Each blade body 4, 5, 6 has a flat plate shape, and the blade edges 14, 15, 16 have sharp edges 14a, 15a, 16a.
Are linearly formed and extend parallel to each other.

(Details of Blade Edge Structure) The middle blade body 5
It is assumed that the lower blade body shaving reference plane P passes through the sharp edge 15a of the blade edge portion 15 and contacts the contact point P ₁₀ on the guide portion 10 of the blade base 2. Then, the protruding distance of the pointed edge 14a of the cutting edge portion 14 of the lower blade 4 with respect to the lower blade body shaving reference plane P (the plane extending through the pointed edge 14a and parallel to the reference plane P is the reference plane P). Distance to
Is A.

A pointed edge 16a of the cutting edge portion 16 of the upper blade body 6
A middle blade shaving reference plane Q that passes through and passes through the tip edge 14a of the blade tip portion 14 of the lower blade body 4 is assumed. Then, the protruding distance of the sharp edge 15a of the cutting edge portion 15 of the middle blade body 5 with respect to the middle blade shaving reference plane Q (this sharp edge 15a
Let B be the distance between a plane that passes through and extends parallel to the reference plane Q with respect to the reference plane Q).

The sharp edge 15a of the cutting edge portion 15 of the middle blade body 5
An upper blade shaving reference plane R that passes through and contacts the contact point R ₁₃ on the holding portion 13 of the top plate 3 is assumed. Then, the protrusion distance of the pointed edge 16a of the cutting edge portion 16 of the upper blade 6 with respect to the reference plane R for shaving the upper blade (the plane extending through the pointed edge 16a and parallel to the reference plane R is the reference plane R). Let C be the distance to

The lower blade protruding distance A and the middle blade protruding distance B
And the upper blade protruding distance C have the following relationship 1) or 2) or 3). 1) Lower blade protruding distance A> Medium blade protruding distance B> Upper blade protruding distance C 2) Lower blade protruding distance A = Medium blade protruding distance B> Upper blade protruding distance C 3) Lower blade protruding Distance A> Middle blade protrusion distance B = Upper blade protrusion distance C By the way, the lower blade protrusion distance A is 100 μ ± 25 μ (+1
25μ to + 75μ), the middle blade protruding distance B is 50μ ± 2
The upper blade protruding distance C is 0 at 5 μ (+75 μ to +25 μ)
It becomes μ ± 25μ (+ 25μ to -25μ). In addition, the thickness of the blade edge portion 14 of the lower blade body 4 and the blade edge portion 1 of the middle blade body 5
The thickness of 5 and the thickness of the blade tip portion 16 of the upper blade body 6 are set to be substantially equal to each other and are 0.08 mm to 0.12 mm. Further, the blade edge angle of the blade edge portion 14 of the lower blade body 4, the blade edge angle of the blade edge portion 15 of the middle blade body 5, and the blade edge angle of the blade edge portion 16 of the upper blade body 6 are set to be substantially equal to each other, and 18 ° to 2
6 °.

A contact point P ₁₀ on the guide portion 10 and a contact point R ₁₃ on the holding portion 13 are perpendicular to the mounting planes H ₄ , H ₅ , H _{6 of the} blades ₄ , ₅ , 6 extending parallel to each other. And vertical planes V ₁₀ , V ₁₃ passing through the respective tip edges 14a, 15a, 16a,
Assume V ₁₄ , V ₁₅ , and V ₁₆ . And each tip edge 14
The vertical planes V ₁₄ , V ₁₅ and V ₁₆ on a, 15a and 16a are located between the vertical planes V ₁₀ and V ₁₃ on both contacts P ₁₀ and R ₁₃ , respectively, with respect to the vertical plane V ₁₀ on the contact point P _10. Pointed edges 14a, 15
Vertical planes V ₁₄ , V ₁₅ , V ₁₆ and contact points R ₁₃ on a and 16a
The distance of the upper vertical plane V ₁₃ is L ₁₄ , L ₁₅ , L ₁₆ , and
When L ₁₃ is set, the relationship of L ₁₄ <L ₁₅ <L ₁₆ <L ₁₃ is satisfied.

This embodiment has the following characteristics (a) to (b). (A) When the razor head 1 is applied to the face and the beard is shaving, if the razor head 1 is moved from top to bottom, first, the lower blade shaving reference plane P follows the face, and the lower blade 4 The beard is cut by the sharp edge 14a. Next, the middle blade shaving reference plane Q is along the face, and the sharp edge 15a of the middle blade 5 is formed.
Will cut the beard. Finally, the upper blade shaving reference plane R is along the face, and the beard is cut by the sharp edge 16a of the upper blade 6.

For example, as described above, when there is a relationship of the lower blade protruding distance A> the middle blade protruding distance B> the upper blade protruding distance C, the lower blade 4 having the largest protruding distance A is the whisker first. As the shave is shaved, the sharpness can be improved even with a hard beard (a beard that does not easily fall down), but the feel is not so good because there is resistance to cutting the skin. However, even if a hard beard is shaved once, it is considerably short, so the protrusion distance B of the middle blade 5 is lower than the lower blade 4.
It may be smaller than the protrusion distance A, and on the contrary, the feeling is improved. Furthermore, since the beard shaved twice by the lower blade body 4 and the middle blade body 5 becomes even shorter, the protrusion distance C of the upper blade body 6 may be smaller than the protrusion distance B of the middle blade body 5, and conversely Will be even better. Therefore, as the razor head 1 is shaved down, the cutting resistance to the skin gradually disappears and the feel becomes soft. Even in that case, the sharpness can be maintained by the three shaving operations by the lower blade body 4, the middle blade body 5, and the upper blade body 6.

(B) On the other hand, as described above, when there is a relationship of the lower blade protruding distance A = the middle blade protruding distance B> the upper blade protruding distance C, the lower blade protruding distance A and the middle blade Body protrusion distance B
Therefore, there may be little difference in feeling between the lower blade 4 and the middle blade 5, but the lower blade 4 and the middle blade 5
The feel of the upper blade body 6 is certainly improved as compared with. Further, as described above, the lower blade protruding distance A> the middle blade protruding distance B =
In the case of the relationship of the upper blade protruding distance C, the middle blade protruding distance B and the upper blade protruding distance C are equal, so that the difference in feeling between the middle blade 5 and the upper blade 6 does not occur so much. However, compared with the lower blade body 4, the feel of the middle blade body 5 and the upper blade body 6 is certainly improved. In any case, the lower blade 4 and the middle blade 5
There is no difference in that the sharpness can be maintained by the three shaving operations by the upper blade body 6 and the upper blade body 6.

[0021]

EFFECTS OF THE INVENTION According to the three-bladed razor of the present invention, it is possible not only to improve the sharpness when used, but also to soften the feel.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a razor head of a three-bladed razor according to this embodiment.

[Explanation of symbols]

1 ... Razor head, 2 ... Blade stand, 3 ... Top plate, 4 ... Lower blade, 5
... Middle blade body, 6 ... Upper blade body, 10 ... Guide portion 10, 13 ... Clamping portion, 14, 15, 16 ... Blade tip portion, 14a, 15a, 1
6a ... Tip edge, P ... Lower blade shaving reference plane, Q ... Medium blade shaving reference plane, R ... Upper blade shaving reference plane, A
... Lower blade protruding distance, B ... Medium blade protruding distance, C ... Upper blade protruding distance.

Claims (1)

[Claims] 1. A lower blade body (4), a middle blade body (5) and an upper blade body (6) are sandwiched between a blade base (2) and a top plate (3), and a blade base (2) ) Between the guide part (10) on the front side and the sandwiching part (13) on the front side of the top plate (3).
A three-blade razor in which the blade tips (14, 15, 16) of the blades (15, 16) are arranged side by side, and the tip edge (15a) of the blade tip (15) of the middle blade body (5) is provided.
Assuming a lower blade shaving reference plane (P) that passes through and contacts the guide portion (10) of the blade base (2), the lower blade (4) with respect to the lower blade shaving reference plane (P). The protrusion distance of the tip edge (14a) of the blade tip portion (14) of (4) is (A), and the tip edge (16a) of the blade tip portion (16) of the upper blade body (6).
Assuming a middle blade shaving reference plane (Q) that passes through and passes through the sharp edge (14a) of the blade tip portion (14) of the lower blade body (4), with respect to this middle blade body shaving reference plane (Q) The protruding distance of the tip edge (15a) of the blade tip portion (15) of the middle blade body (5) is (B), and the tip edge (15a) of the blade tip portion (15) of the middle blade body (5).
Assuming an upper blade body shaving reference plane (R) that passes through the upper blade body shaving reference plane (R) and is in contact with the holding portion (13) of the top plate (3), the upper blade body (6) with respect to the upper blade body shaving reference plane (R). (3) When the protrusion distance of the tip edge (16a) of the blade tip portion (16) is (C), it has the following relationship 1) or 2) or 3). 1) Lower blade protruding distance (A)> Middle blade protruding distance (B)> Upper blade protruding distance (C) 2) Lower blade protruding distance (A) = Middle blade protruding distance (B)> Upper blade Body protrusion distance (C) 3) Lower blade protrusion distance (A)> Medium blade protrusion distance (B) = Upper blade protrusion distance (C)