JPH09285663A - Safety razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety razor having three blades capable of preventing the bend of a lower blade caused by the edge of the lower blade distant from caulking shafts and the oscillation thereof at use. SOLUTION: The safety razor comprises three blades piled in order of an upper blade 1, a middle blade 2 and a lower blade 3. The edges for blades recede from those of blades piled beneath respectively. The caulking shafts 6, 8 mounted integrally on the rear side of a top plate 4 penetrate through holes consecutively penetrating the three blades and are fixed on a blade stand 5. The caulking shafts 6, 8 are plurally provided side by side along the front edge 7 of the top plate 4 and further, are plurally provided side by side between the front edge 7 and the rear edge.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a safety razor having three blades.

[0002]

2. Description of the Related Art Conventionally, there was a safety razor having two blades stacked, but no safety razor having three blades stacked.

[0003]

Since there is a safety razor in which two blades are stacked, naturally there was an idea for three blades, but there are various ways to commercialize a three-blade safety razor. It had not been realized until now due to the obstacle. One of the obstacles is the caulking shafts, which are lined up in a line as in the past, by stacking the three blades so that the blade edges of the upper blade and the blade edge of the lower blade recede. When each blade body is fixed, the blade edge of the bottom blade body becomes far from the caulking axis, so that the blade body may warp and vibrate due to beard resistance during use. An object of the present invention is to provide a safety razor in which the blades do not vibrate even when three blades are stacked and fixed by a caulking shaft.

[0004]

SUMMARY OF THE INVENTION According to the present invention, three blades are stacked in order of an upper blade 1, a middle blade 2 and a lower blade 3 from the top, and the blades of the respective lower blades are stacked. The blade edge of the blade above it is retracted, and the caulking shaft integrally provided on the back surface of the top plate 4 is fixed to the blade base through an insertion hole that passes through the three blades in series. In the safety razor described above, there are at least two rows of crimping shafts in the lateral direction, one row of which is provided along the front edge 7 of the top plate, and another row of crimping shafts is provided. A plurality of reference numerals 8 are provided between the front edge 7 and the rear edge 9 of the top plate.

[0005]

Embodiments of the present invention will be described with reference to the drawings. The drawing shows a spare blade for a safety razor, in which an upper blade body 1 and an upper spacer are arranged between a top plate 4 and a blade base 5 in this order from the top.
10, the middle blade 2, the lower spacer 11, and the lower blade 3 are stacked. The spacers 10 and 11 are mounted in order to keep the distance between the blades constant. Two rows of insertion holes are formed in the lateral direction so as to pass through the stacked blades and spacers in series, four insertion holes are provided in the front row, and three insertion holes are provided in the rear row. ing. In order to form these insertion holes, seven circular holes 12 are provided in each of the blades and spacers in two rows in the front and rear. Further, seven round holes 13 are also formed in the blade stand 5 so as to communicate with the insertion holes.

The top plate 4 is an integrally molded product of synthetic resin,
Seven caulking shafts 6 and 8 for inserting into the seven insertion holes formed by the blade body and the spacer described above are provided on the back surface of the top plate in front and rear two rows. Four caulking shafts 6 in the front row are arranged along the front edge 7 of the top plate. Rear row caulking shaft 8
The three are arranged side by side slightly ahead of the rear edge 9 of the top plate. The caulking shafts 6 and 8 are inserted into the circular holes 13 of the blade base through the insertion holes formed by the circular holes 12 of the blade bodies and the spacers, and the ends of the caulking shafts are the back surfaces of the blade bases. By crimping the protruding part, each caulking shaft is fixed to the blade stand 5,
A replaceable blade can be made by firmly attaching each blade body and each spacer between the top plate 4 and the blade stand 5.

As is apparent from FIG. 2, if three blade bodies are stacked and the blade edges of the blade body above the blade edge of the lower blade body are retracted so as to recede, the lower blade body is inevitable. The blade edge of 3 will be far away from the caulking axis. Therefore, when the caulking shafts 6 and 8 are not arranged in two rows in the front and rear as in the present invention but are arranged in a central single row as in the conventional case, the distance from the caulking axis to the blade edge of the lower blade body becomes very large, so that when shaving. The beard resistance may warp the lower blade in particular, causing vibration. In the present invention,
Since the front row of the caulking shafts is provided along the front edge 7 of the top plate, the distance between the blade edge of the lower blade 3 and the caulking shafts in the front row is short, and the blade body is so large that the shaving may be disturbed. It does not warp or vibrate.

A groove 14 provided along the front edge of the upper spacer, a square hole 15 provided along the front edge of the middle blade, and a groove provided along the front edge of the lower spacer. 16 and the square holes provided along the front edge of the lower blade communicate with each other in the vertical direction to form a whiskers discharge passage, and whiskers clogged between the blades finally pass through the discharge passage. It is discharged to the back surface of the blade stand 5 through the square hole 18 of the blade stand.

A step 19 is formed along the rear end of each spacer 10, 11, and as shown in FIG. 2, the step 19 allows the middle blade 2 and the upper blade 1 to move to the lower blade 3. It is mounted so as to lean forward. By tilting the upper blade body 1 and the middle blade body 2 forward, a softer razor that is softer on the skin than when the blade bodies are simply stacked in parallel is provided.

[0010]

According to the present invention having the above-mentioned structure, the caulking shaft integrally provided on the back surface of the top plate is fixed to the blade base through the insertion hole that passes through the three blade bodies in series. A part of the caulking shafts are arranged side by side along the front edge of the top plate.
Therefore, since the caulking shafts arranged in the front row can minimize the distance from the blade edge of the lower blade body, even if the lower blade body receives a beard resistance during shaving, the blade body will almost not warp. And the blade body does not vibrate, and shaving can be performed smoothly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a sectional view taken along line AA when FIG. 1 is assembled.

[Explanation of symbols]

 1 Upper Blade 2 Middle Blade 3 Lower Blade 4 Top Plate 5 Blade Stand 6 Caulking Axis 7 Front Edge of Top Plate 8 Caulking Axis 9 Rear Edge of Top Plate 10 Upper Spacer 11 Lower Spacer 12 Round Hole 13 Round hole 14 Recessed groove 15 Square hole 16 Recessed groove 17 Square hole 18 Square hole 19 Step

Claims (1)

[Claims] 1. A blade edge of a blade body on which three blade bodies are stacked in this order from an upper blade body, a middle blade body, and a lower blade body, and the blade edges of the blade bodies above the blade bodies of the respective lower blade bodies. In the safety razor, the caulking shaft is retracted, and the caulking shaft integrally provided on the back surface of the top plate is fixed to the blade base through an insertion hole that penetrates three blade bodies in series. A plurality of safety razors are arranged along the front edge of the plate, and are also arranged between the front edge and the rear edge.