JP2001334079A - Structure for sandwiching blade body in triple blade razor head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simplified structure for sandwiching a blade body in a triple blade razor head. SOLUTION: In the triple blade razor head, a lower blade body 3, a middle blade body 4 and an upper blade body 5 are sandwiched between a blade base 1 and an upper board 2. The upper blade 5 is sandwiched between the upper board 2 and a first lower supporting protrusion 6 of the blade base 1 which protrusion goes through the lower blade body 3 and the middle blade body 4 and pushes the upper blade 5. The lower blade body 3 is sandwiched between the blade base 1 and a first upper supporting protrusion 8 of the upper board 2 which protrusion goes through the upper blade body 5 and the middle blade body 4 and pushes the lower blade 3. A second lower supporting protrusion 7 of the blade base 1 and a second upper supporting protrusion 9 of the upper board 2 are placed in separate positions from the first lower supporting protrusion 6 and the first upper supporting protrusion 8. The second lower supporting protrusion 7 goes through the lower blade body 3 and pushes the middle blade body 4. The second upper supporting protrusion 9 goes through the upper blade body 5 and pushes the middle blade body 4. The middle blade body 4 is sandwiched between the second lower supporting protrusion 7 and the second upper supporting protrusion 9. By this constitution, the shapes of the first lower supporting protrusion 6 and the first upper supporting protrusion 8 can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-blade razor head in which a lower blade, a middle blade and an upper blade are sandwiched between a blade base and a top plate.

[0002]

2. Description of the Related Art Conventionally, for example, in a three-blade razor head disclosed in Japanese Patent Laid-Open No. Hei 9-187585, as shown in FIG.
(Corresponding to the first lower support projection of the present invention) is penetrated by the lower blade body 5 and the middle blade body 4 and is abutted against the upper blade body 3 so that each of the holding tables 11 and the top plate 2 forms an upper blade. Each of the support shafts 21 (corresponding to the first upper support protrusion of the present invention) through which the body 3 is sandwiched and protruded from the top plate 2 penetrates through the upper blade body 3 and the middle blade body 4 and the lower blade body 5. The lower blade body 5 is sandwiched between the support shafts 21 and the blade base 1. On the other hand, the middle blade body 4 is sandwiched between a step-like holding surface 14 formed on each of the holding tables 11 and a step-like holding surface 26 formed on each of the support shafts 21.

[0003]

However, since it is necessary to form stepped holding surfaces 14 and 26 on each of the holding tables 11 and each of the support shafts 21, the shape of each of the holding tables 11 and each of the support shafts 2 are required.
There was a problem that the shape of No. 1 became complicated.

According to the present invention, by providing an object corresponding to the step-like holding surface separately from the holding table and the support shaft, the shape of the first lower support projection corresponding to the holding table,
It is intended to simplify the shape of the first upper support projection corresponding to the support shaft.

[0005]

Means for Solving the Problems and Effects of the Invention The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 and 2) of the embodiments described later. In the three-blade razor head of the present invention, the lower blade (3), the middle blade (4) and the upper blade (4) are provided between the blade base (1) and the top plate (2). 5). The first lower support protrusion (6) protruding from the blade base (1) is made to penetrate through the lower blade body (3) and the middle blade body (4), and abuts on the upper blade body (5). Upper blade body (5) with side support projection (6) and top plate (2)
Is sandwiched. The first upper support projection (8) projecting from the top plate (2) is made to penetrate the upper blade body (5) and the middle blade body (4), and abuts on the lower blade body (3). The lower blade body (3) is sandwiched between the projection (8) and the blade base (1).

In addition to the first lower support protrusion (6) and the first upper support protrusion (8), a second lower support protrusion (7) protruding from the blade base (1), and a top plate (2). ) And a second upper support projection (9) protruding from the first lower support projection (6) and the first upper support projection (8). Penetrates the lower blade body (3) and abuts the middle blade body (4), and the second upper support protrusion (9) penetrates the upper blade body (5) and abuts the middle blade body (4). The middle blade body (4) is sandwiched between the second lower support projection (7) and the second upper support projection (9). Therefore, the second lower support protrusion (7) and the second upper support protrusion (9) for holding the middle blade body (4) are replaced with the first lower support protrusion (6) and the first upper support protrusion (8). Can be formed irrespective of the shape. Therefore, the shape of the first lower support protrusion (6) and the shape of the first upper support protrusion (8) can be simplified.

Further, the second lower support projection (7) and the second upper support projection (9) face each other with the middle blade (4) interposed therebetween. Therefore, the contact surface (18) of the second lower support projection (7) butted against the middle blade body (4) and the contact surface of the second upper support projection (9) butted against the middle blade body (4). (19) are opposed to each other, and an upper region (P) of the contact surface (18) and a lower region (Q) of the contact surface (19) intersect with each other. The direction of the generated pressing force (f) and the direction of the pressing force (f) generated on the contact surface (19) are opposed to each other, and some or all of the pressing forces (f) cancel each other. Therefore, these contact surfaces (18) (1)
9) The middle blade body (4) can be reliably clamped between the 9) without bending in the vertical direction.

* Invention of Claim 2 The present invention is configured as follows based on the invention of Claim 1. Abutment surfaces (18) of the second lower support projections (7) facing the middle blade body (4) in the second lower support projections (7) and the second upper support projections (9) facing each other; Pressurizing force (f) applied to the intermediate blade body (4) and pressure applied to the intermediate blade body (4) by the contact surface (19) of the second upper support projection (9) butted against the intermediate blade body (4). The force (f) is
They are almost equal to cancel each other. Therefore, the middle blade body (4) is provided between the contact surfaces (18) and (19).
Can be more reliably held.

* Invention of Claim 3 This invention is configured as follows based on the invention of Claim 1. Abutment surfaces (18) of the second lower support projections (7) facing the middle blade body (4) in the second lower support projections (7) and the second upper support projections (9) facing each other; And the shape and area of the contact surface (19) of the second upper support projection (9) abutting against the middle blade body (4) are substantially the same. Therefore, the intermediate blade body (4) can be more reliably sandwiched between the contact surfaces (18) and (19).

* Invention of Claim 4 The present invention is configured as follows based on the invention of Claim 1. Abutment surfaces (18) of the second lower support projections (7) facing the middle blade body (4) in the second lower support projections (7) and the second upper support projections (9) facing each other; And the lower region (Q) of the contact surface (19) of the second upper support projection (9) abutting against the middle blade body (4) substantially coincide with each other. Therefore, the intermediate blade body (4) can be more reliably sandwiched between the contact surfaces (18) and (19).

* Invention of Claim 5 The present invention is configured as follows based on the invention of any one of Claims 1 to 4.

[0012] A pair of support projections (20) comprising a second lower support projection (7) and a second upper support projection (9) facing each other are connected to the cutting edge (3, 4, 5) of each blade body (3, 4, 5). 3a, 4
a, 5a) are arranged in a plurality in the extending direction (X). A first lower support projection (6) between two sets of support projections (20) in the closest positional relationship among the plurality of sets of support projections (20).
And the first upper support projection (8) with the cutting edge (3a, 4a, 5).
They are alternately arranged in the extending direction (X) of a). Therefore, the clamping force (F) generated in each blade body (3, 4, 5) can be equalized, and each blade body (3, 4, 5) can be securely clamped.

* Inventions other than Claims-Sixth invention This invention is a combination of the invention of Claim 2 and the invention of Claim 3, or a combination of the invention of Claim 2 and the invention of Claim 4. It is a combination of the invention of claim 3, the invention of claim 3 and the invention of claim 4, or the combination of the invention of claim 2 and the invention of claim 3 and the invention of claim 4.

Seventh Invention The present invention is configured as follows based on the invention of any one of claims 1 to 5 or the sixth invention.

A shaving elimination gap (21) is provided between the lower blade body (3) and the middle blade body (4) and between the middle blade body (4) and the upper blade body (5).

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A three blade razor head according to an embodiment of the present invention and a blade body clamping structure thereof will be described below with reference to the drawings.

This three-blade razor head is roughly divided into a blade base 1, a top plate 2, a lower blade 3, a middle blade 4, and an upper blade 5. The lower blade body 3, the middle blade body 4, and the upper blade body 5 are vertically stacked between the blade base 1 and the top plate 2, and the blade edges 3a, 4a, 5a of the blade bodies 3, 4, 5 are used. It is exposed to the front between the table 1 and the top plate 2 and is arranged vertically. The blade base 1 has a plurality of first lower support protrusions 6 and a plurality of second lower support protrusions 7 separated and separated from the respective first lower support protrusions 6 toward the top plate 2. It is projected toward. The top plate 2 includes a plurality of first upper support protrusions 8 and a plurality of second upper support protrusions 9 separated from each of the first upper support protrusions 8 and protruding toward the blade base 1. Has been established. The first upper support projection 8 includes a large-diameter shaft portion 8a and a small-diameter caulked portion 8b formed in a stepped shape at the lower end of the shaft portion 8a. The lower blade body 3 and the middle blade body 4 each have a support hole 10 through which each first lower support protrusion 6 passes.
Are formed. Each of the second lower support protrusions 7 is provided on the lower blade body 3.
A support hole 11 through which the air flows is formed. The upper blade body 5, the middle blade body 4, the lower blade body 3, and the blade base 1 each have a support hole 12 through which each first upper support protrusion 8 passes. The upper blade body 5 has a support hole 13 through which each second upper support protrusion 9 passes.

Each of the first lower support projections 6 penetrates through the support hole 10 of the lower blade body 3 and the support hole 10 of the middle blade body 4.
The contact surface 14 which is the upper end surface of each of the first lower support protrusions 6 abuts against the lower surface of the upper blade body 5, and the contact surface 14 of each of the first lower support protrusions 6 and the top plate 2 make contact. The upper blade body 5 is sandwiched between the surface 15 and the upper blade body 5. The shaft portions 8a of the first upper support protrusions 8 are provided with support holes 12 of the upper blade body 5 and support holes 12 of the middle blade body 4.
And the caulking portion 8 of each first upper support projection 8
b penetrates through the support hole 12 of the lower blade body 3 and the support hole 12 of the blade base 1. The caulking portion 8 is formed by each of the first upper support protrusions 8.
The contact surface 16 of the shaft portion 8a at the stepped portion with respect to the bottom surface b is abutted against the upper surface of the lower blade body 3. And the lower blade body 3 is clamped.

The second lower support protrusion 7 penetrates through the support hole 11 of the lower blade body 3 and abuts against the lower surface of the middle blade body 4. The second upper support protrusion 9 is provided in the support hole 1 of the upper blade body 5.
3 and abuts against the upper surface of the middle blade body 4.
An abutting surface 18 which is an upper end surface of the second lower support projection 7;
The middle blade body 4 is sandwiched between the contact surface 19 which is the lower end surface of the second upper support projection 9. The contact surface 18 of the second lower support protrusion 7 and the contact surface 19 of the second upper support protrusion 9 face each other with the middle blade body 4 interposed therebetween, and the second lower support protrusion 7 and the second A set of support protrusions 20 including the upper support protrusions 9 is configured.

The set of support projections 20 is provided on each of the blades 3, 4,
The three cutting edges 3a, 4a, 5a are arranged in three sets at the center position and the left and right end positions in the extending direction X (left-right direction). Of the support projections 20 of each set, between the support projection 20 at the center position and the support projection 20 at the left end position, the support projection 2 at the center position
0 and the support projection 20 at the right end position, the first lower support projection 6 and the first upper support projection 8 respectively have the cutting edges 3a,
Two pieces are alternately arranged side by side in the extending direction X of 4a and 5a. In addition, a single first lower support projection 6 is provided between them.
And one first upper support protrusion 8 may be provided side by side. “Alternating” in the claims means that the same ones are not arranged adjacent to each other irrespective of the number of the support projections 20, 6, and 8.

The caulked portion 8b of each of the first upper support protrusions 8
Is caulked below the blade base 1, the lower blade body 3, the middle blade body 4 and the upper blade body 5 are clamped between the blade base 1 and the top plate 2, and the lower blade body 3
And the middle blade body 4, and between the middle blade body 4 and the upper blade body 5, exclusion gaps 21 are formed. In this case, a vertical holding force F perpendicular to the extending direction X of the blade edges 3a, 4a, 5a is applied to the blade bodies 3, 4, 5.

In each set of the support projections 20 (the second lower support projection 7 and the second upper support projection 9), the shape of the contact surface 18 of the second lower support projection 7 abutting against the middle blade 4. And the second upper support projection 9 against the area and the middle blade body 4
The shape and area of the contact surface 19 are substantially the same as each other, and the upper region P of the contact surface 18 and the lower region Q of the contact surface 19 substantially coincide with each other. The pressing force f (part of the clamping force F) applied to the middle blade 4 by the surface 18 and the pressing force f applied to the middle blade 4 by the contact surface 19
(A part of the clamping force F) is substantially equal to each other so as to cancel each other.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view showing a three-blade razor head according to the embodiment, and FIG. 1B is an assembled perspective view of the same.

2A is a cross-sectional view of FIG. 1B, and FIG.
FIG. 4 is a partially enlarged sectional view of FIG. 4A, and FIG. 4C is a partially enlarged explanatory view showing a relationship between the second lower support protrusion and the second upper support protrusion shown in FIGS.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blade base, 2 ... Top plate, 3 ... Lower blade body, 4 ... Middle blade body, 5 ... Upper blade body, 3a, 4a, 5a ... Blade edge, 6 ... First lower support protrusion, 7 ... Second lower Side support protrusion, 8 ... first upper support protrusion, 9
... second upper support projection, 20 ... one set of support projections.

Claims (5)

[Claims] 1. A three-blade razor head having a lower blade body, a middle blade body, and an upper blade body sandwiched between a blade base and a top plate, wherein a first lower support projection protruding from the blade base is provided. The upper blade is sandwiched between the first lower support projection and the top plate while being passed through the lower blade body and the middle blade body and abutting against the upper blade body, and the first upper support projection protruding from the top plate is raised. The lower blade body is sandwiched between the first upper support protrusion and the blade base while being passed through the blade body and the middle blade body and abutting against the lower blade body, in addition to the first lower support protrusion and the first upper support protrusion. To
A second lower support protrusion protruding from the blade base and a second upper support protrusion protruding from the top plate are provided separately from the first lower support protrusion and the first upper support protrusion. While penetrating the side support projection through the lower blade body and butting against the middle blade body,
The second upper support protrusion penetrates the upper blade body and abuts against the middle blade body, and the second lower support protrusion and the second upper support protrusion face each other with the middle blade body therebetween. A blade body clamping structure in a three-blade razor head characterized by sandwiching a blade. 2. A pressing force applied to a middle blade body by a contact surface of a second lower support projection abutting against a middle blade body between a second lower support projection and a second upper support projection facing each other;
3. The three-blade blade according to claim 1, wherein the contact surface of the second upper support projection butted against the middle blade body exerts substantially the same pressing force applied to the middle blade body so as to cancel each other. Blade body clamping structure in razor head. 3. The shape and area of the contact surface of the second lower support projection abutting on the middle blade body between the second lower support projection and the second upper support projection facing each other. The blade body clamping structure in the three-blade razor head according to claim 1, wherein the shape and area of the abutting surfaces of the butted second upper support projections are substantially the same. 4. An upper area of a second lower support projection and a second upper support projection facing each other, the area above an abutting surface of the second lower support projection abutting on the middle blade body, and abutting on the middle blade body. The blade body clamping structure of the three-blade razor head according to claim 1, wherein the lower region of the contact surface of the second upper support projection substantially coincides with each other. 5. A plurality of sets of support projections each comprising a second lower support projection and a second upper support projection facing each other are arranged in the direction in which the cutting edge of each blade body extends. The first lower support projection and the first upper support projection are alternately arranged in the direction in which the cutting edge extends, between the two sets of support projections having the closest positional relationship among them. Claim 4
A blade clamping structure in the three-blade razor head according to any one of claims 1 to 4.