JP3096682B2 - Safety razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety razor used by the general public, the razor having a blade edge covered with a plurality of blade guards.

[0002]

2. Description of the Related Art A plurality of holes are provided side by side on a guard plate to form a blade guard between two adjacent holes.
There has been a safety razor in which such a blade guard covers the blade edge of the blade body. Since the holes are provided very close to each other, the width of the edge guard is formed as a very narrow and thin line. The width of the guard plate is formed to be the same as the entire width of the blade body, and the width of the edge guards at both ends in the edge guard is wider than the other edge guards. It was covered by being pressed by the side edge of the top plate.

In order to clamp the blade member between the blade base and the top plate, four fitting projections are provided side by side on the back surface of the top plate, and the fitting projections are provided on the blade member. And four guard holes provided in the guard plate, respectively, and the tips of the fitting projections are fixed to the blade base.

[0004]

When the blade edge of the blade is covered with a blade guard provided on a guard plate, the blade edge and the blade guard are covered.
A safety razor with a cutting edge guard is disadvantageous in that when the cutting edge guard is moved over the cutting edge by receiving lateral pressure during use, the cutting edge is damaged and the sharpness becomes poor. Exists.

[0005] In order to avoid such a drawback, there has been proposed an apparatus in which a small space is provided between the blade guard and the blade edge so that they do not come into contact with each other. Further, in a safety razor in which three blades are superimposed, a blade guard covering the blade edge is longer than a single- or two-blade safety razor. Therefore, if there is an interval between all the edges of the three blades and the edge guard, the amount of lateral movement of the edge guard during use becomes too large, and the shaving is smooth. The original effect of the edge guard is reduced. In order to avoid such inconveniences, only the blade edge of the middle blade body and the blade guard in the middle of the three blades are kept out of contact, and the blade edges of the upper blade body and the lower blade body are not in contact with each other. Has also proposed a safety razor for contact.

As described above, recent safety razors with a blade guard have a very small distance between the blade edge and the blade guard, and a three-blade safety razor has a medium blade. There is a demand for a very precise configuration in which only the blade edge and the blade guard are kept out of contact with each other. In order to realize such a precise configuration, it is necessary to particularly accurately cover the blade edge provided on the guard plate.

As described above, the width of the conventional guard plate is formed to be the same as the entire length of the blade body, and the width of the blade guards at both ends of the blade guard is different from that of the other blades. It was wider than the guard and was covered by the side edges of the top plate as if pressed. In other words, both ends of a thin blade guard that actually function had edge blade guards that are much wider than both ends. In a safety razor in which the guard plate is folded in two and wound around the cutting edge, the cutting edge guards at both ends are covered by the side end portions of the top plate, so that the cutting edge guard does not function during use. . Rather, when the blade guard is wound around the blade edge, the guard plate is bent.However, since the narrow blade guard and the wide edge blade guard are not bent in the same manner, the guard plate is bent. There is a risk that an error will occur when trying to take a small distance between the cutting edges, and that the cutting edge guard will come into contact with the cutting edge or be too far from the cutting edge.

Further, such an error in the positional relationship between the edge guard and the edge of the edge is caused by a safety razor of another construction, that is, one end of the guard plate is located between the top plate and the blade member. This also occurs in safety razors in which the guard plate is clamped and the other end of the guard plate is fixed to a guard bar extending laterally beyond the cutting edge.

Further, the edge guard is actually 6 to 16
When the guard plate is bent or mounted between the top plate and the guard bar, the longer the guard plate, the more the positions of all the edge guards and the edge of the blade. It is difficult to make the relationship uniform, and in the configuration of the conventional product, there is a possibility that an error may occur in the interval between the edge guard and the edge of the edge, which requires a very precise configuration.

Therefore, the present invention relates to a safety razor in which the cutting edge is covered with a cutting edge guard, and in which a small gap is provided between the cutting edge and the cutting edge guard. Even when a configuration is required, it is an object to provide one with a small error.

[0011]

According to the present invention, a blade base 1 is provided.
A blade member is sandwiched between the top plate 2 and the top plate 2. Side ends 6, 6 extending forward from both ends of the top plate 2 hold down both end portions of the blade member. In the safety razor formed by providing a plurality of holes 4 in a single guard plate 3, at least four blade guards are present. , All the edge guards are formed to be narrow with approximately the same width.
Two end edge guards 5a, 5 at both ends of the blade
a is present at a distance from the side end portions 6 and 6 adjacent to the side thereof, and another portion of the guard plate 3 exists outside the both-end edge guards 5a and 5a. I haven't.

Further, four fitting projections 7 are integrally provided on the back surface of the top plate 2, and the guard plate 3 is provided with two fitting projections 7, 7 from the center. It is characterized in that a book insertion portion is provided, and both end fitting projections 7a, 7a present at both ends pass outside the guard plate 3.

According to a second aspect of the present invention, there is provided the guard plate such that the blade edge of the blade member is sandwiched in the first aspect of the invention.
Is limited to a safety razor in which the blade guard 5 is wound around the blade edge. In addition, one end of the guard plate is sandwiched between the top plate and the blade member, and the other end of the guard plate extends laterally beyond the cutting edge. The structure fixed to-is also included in claim 1.

[0014]

The present invention is constructed as described above and has two end edge guards 5 at both ends of the edge guard.
a, 5a are the side edges 6, 6 of the top plate adjacent to the side, respectively.
6 at a distance from the end edge guards 5a,
There is no other part of the guard plate 3 outside of 5a, and four fitting projections 7 are integrally provided on the back surface of the top plate 2, and the guard plate 3 has Two fitting projections 7 from the center,
Two insertion portions are provided for inserting the insertion plate 7, and both end fitting protrusions 7 a, 7 a existing at both ends pass outside the guard plate 3. That is, the present invention leaves only those that actually function as the edge guards in use among the edge guards, removes the edge guards having a wide width at both ends, and further attaches the guards to the edges. Plate 3 is attached to both ends of the blade guards 5a, 5a.
Are formed in such a manner that the vertical straight line constituted by the two ends is formed at both ends. Therefore, when the guard plate is bent and wound around the cutting edge, the length of the bending line from the cutting edge guard 5a at one end to the cutting edge guard 5a at the other end can be made shorter than before.

In the conventional product, the length of the guard plate in the lateral direction is the same length as the blade body and is considerably long. Therefore, the guard plate is bent to wind the blade guard around the blade edge. However, when the guard plate was long, errors tended to occur at both ends of the guard plate. For this reason, there is a possibility that an error may occur when all the edge guards are bent uniformly and a very small interval is to be provided between the edge guard and the edge. According to the present invention, as described above, the edge guard 5a at one end is provided.
Since the length of the bending line from the edge to the blade edge guard 5a at the other end can be made shorter than before, the garbage to be bent can be reduced.
The blade plate is more compact and the blade guard 5
a, 5a is bent more accurately to reduce the error even when a precise configuration is required for the edge guard, such as when a small gap is provided between the edge of the edge and the edge guard. Can be.

Four fitting projections 7 are integrally provided on the back surface of the top plate 2, and two fitting projections 7, 7 from the center are inserted through the guard plate 3. Is provided,
It is characterized in that both end fitting projections 7a, 7a existing at both ends pass outside the guard plate 3. Conventionally, the top plate has four fitting projections, and the guard plate has four projections. That is, conventionally, the guard plate is positioned at four locations. However, since there are four locations for positioning, when an error occurs at any location, the other three locations are affected. The guard plate may not be mounted correctly. On the other hand, in the present invention, the position of the guard plate is two.
Since there are only a few places, the guard plate can be mounted almost exactly even if an error occurs in any place.

[0017]

Embodiments of the present invention will now be described with reference to the drawings. In the embodiment, the guard blade 3 is folded in two so as to sandwich the blade edge of the blade member, thereby making it possible to cut the blade edge guard.
The blade 5 is wound around the blade edge. The present invention is not limited to such a configuration, and one end of the guard plate is sandwiched between the top plate and the blade member, and the other end of the guard plate is formed as a blade edge. It goes without saying that a safety razor having a configuration fixed to a guard bar extending laterally forward may be used.

The drawings show an upper blade body 8, a middle blade body 9 and a lower blade body 1.
The present invention relates to a so-called three-blade safety razor in which three zero blades are stacked. The blade member includes an upper blade body 8, a middle blade body 9, a lower blade body 10, an upper spacer 11, and a lower spacer 12. An upper spacer 11 is provided between the upper blade 8 and the middle blade 9.
And a lower spacer 12 is interposed between the middle blade body 9 and the lower blade body 10.

A blade guard 5 of a separate guard plate 3 covers the blade edge of each blade body. The guard plate 3 is formed of a thin metal such as stainless steel in a rectangular shape, and nine substantially square holes 4 are arranged in the center of the guard plate 3 so as to be close to each other. Therefore, a narrow, almost linear edge guard 5 is formed between the adjacent holes 4, 4, and ten edge guards 5 are arranged on the guard plate 3 in parallel. . Both end edge guards 5a, which are present at both ends of these edge guards,
Like the other edge guards 5, 5a is also formed in a narrow and substantially linear shape.

The holes 4 having different lengths in the longitudinal direction are alternately arranged, and the upper edges of all the holes 4 are formed so as to be aligned. Therefore, the longer hole 4 protrudes below the shorter hole, and the protruding portion 27 is widened in the lateral direction. Since the protruding portion 27 is located below the mustard discharge hole 25 of the lower blade body 10, the mustard debris that has passed through the mustache discharge hole 25 is smoothly discharged downward through the protruding portion 27. The shavings discharge hole 25 provided in the lower blade body 10 is formed larger than the conventional product in accordance with the size of the protruding portion 27.

As shown in FIG. 4, the guard plate 3 is formed to be compact as a whole, since there is no portion of the guard plate 3 outside the edge guards 5a at both ends. ing.
Then, as shown in FIG. 1, both end edge guards 5a, 5a
Are located inside the side edges 6, 6 of the top plate adjacent to the side. Therefore, the edge guard 3 of the present invention
Has a smaller width in the lateral direction than the conventional blade edge guard shown in FIG. FIG. 6 shows the size comparison between the guard plate 3 of the present invention and the conventional product shown in FIG.
It can be seen that the plate is quite compact.

FIGS. 7 to 18 show parts used in the present invention and conventional parts. The parts used in the present invention are different from the conventional parts in this way in order to smoothly discharge the whiskers clogged between the blade bodies downward. However, the configuration of these components has nothing to do with the configuration of the present invention.

During shaving, the shaved shavings collect in each spacer recess 24 and are discharged downward from the shavings discharging holes 25 of the blade body located below.
FIG. 7 shows a lower blade used in the present invention, and FIG. 8 shows a conventional blade. The whisker discharge hole 25 is formed larger than the conventional product, and the whisker debris can be efficiently discharged downward. FIG. 9 is a diagram showing a comparison of the size of the mustard discharge holes.

FIG. 10 is a lower spacer of the present invention, and FIG.
1 is a conventional product. The spacer recess 24 of the present invention is formed deeper than the conventional product, and can efficiently remove mustaches downward. FIG. 12 is a diagram showing a comparison of the depth of the spacer recess.

FIG. 13 is an upper spacer of the present invention, and FIG.
4 is a conventional product. Again, the spacer recess 2 of the present invention
(4) It is formed deeper than conventional products, and can efficiently remove mustaches downward. FIG. 15 is a diagram showing a comparison of the depth of the spacer recess.

FIG. 16 shows a blade base of the present invention, and FIG. 17 shows a conventional product. The four mustache discharge holes 26 provided in the blade base of the present invention are formed larger than the mustache discharge holes 28 of the conventional product in FIG. 17, so that the mustache can be efficiently discharged. FIG.
FIG. 8 is a diagram showing a comparison of the size of the shavings discharge hole of the blade base.

The guard plate 3 is provided with the edge guards 5 arranged in a line.
Are bent along a straight line crossing substantially the center of the blade, and are wound so as to cover the cutting edges of the three blades 8, 9, and 10 which are overlapped. The upper half 15 of the bent guard plate is sandwiched between the upper blade body 8 and the top plate 2,
The lower half 16 of the guard plate is clamped and fixed between the lower blade body 10 and the blade base 1. Four fitting projections 7 are integrally provided on the back surface of the top plate 2, and two fitting projections 7, 7 from the center thereof are provided on the upper half 15 of the guard plate. Insertion hole, which is an insertion portion provided in each part of the round hole 17, upper blade body 8, upper spacer 11, middle blade body 9, lower spacer 12, and lower blade body 10 which are insertion portions. 29, a concave portion 18 which is an insertion portion provided in the lower half portion 16 of the guard plate, and the blade rest 1
These members penetrate through an insertion hole 30 which is an insertion portion provided in the above, and are firmly fixed in a state where these members are stacked.

The two-sided fitting projections 7a, 7a at both ends of the fitting projections penetrate through the insertion portion of each component and are firmly attached to the blade base 1 like the fitting projections 7, 7 near the center. Although the projections 7a, 7a are fitted at both ends, the upper half 15 of the guard plate is fixed.
The point that the lower half 16 does not penetrate is different from the fitting projections 7 near the center.

The bent guard plate 3 is moved to the center position 2
The insertion portion provided in the guard plate 3 for passing through the fitting projections 7 is a circular hole 1 provided in the upper half portion 15 of the guard plate.
7, 17 and a U-shaped recess 18 provided in the lower half 16 of the guard plate. The difference is that all the other insertion portions are holes, whereas the insertion portion provided in the lower half 16 of the guard plate is not a hole but a recess.

The cutting edge guard 5 wound around the cutting edges of the three blades 8, 9 and 10 has a cutting edge 13 of the upper blade and a cutting edge 14 of the lower blade as shown in FIG. Are in contact with each other, but are not in contact with the blade edge 19 of the middle blade because there is a space between them. Blade edge 13 and blade guard 5 of the upper blade body
And the contact between the cutting edge 14 of the lower blade body and the cutting edge guard 5, the contact pressures thereof are not merely touching, but rather large. Therefore, since the frictional force due to the contact is very large, even when a lateral pressure is applied from the beard during use, the amount of movement of the blade guard 5 at the contact portion is small. As a result, the blade edge 13 of the upper blade and the blade edge 14 of the lower blade are slightly damaged by the left and right movement of the blade guard 5, and the sharpness is slightly deteriorated.

On the other hand, a gap is provided between the blade edge 19 of the middle blade body and the blade guard 5, so that they are not in contact with each other. Therefore, even when the blade guard 5 is moved left and right by receiving a lateral pressure from the beard during use, the blade edge 19 of the middle blade body can be moved.
There is no danger of the blade being damaged by the blade guard 5, and the sharpness is not deteriorated by the contact of the blade guard 5.

As described above, in the three-blade safety razor shown in the drawing, the blade edge and the blade guard do not come into contact with each other only with the blade edge 19 of the middle blade, but with the upper blade. The blade edge 13 of the lower blade and the blade edge 14 of the lower blade body are in contact with the blade guard 5. In addition, the blade edge 19 of the middle blade body and the blade guard 5
Is extremely small, each edge guard 5 must be precisely and uniformly bent. In the conventional product, as shown in FIG. 5, the width of the edge guards at both ends is wider than that of the other edge guards. On the contrary, there is a possibility that the thin blade guard may not be uniformly bent.
On the other hand, in the present invention, since all the edge guards have the same width as shown in FIG. 4, they can be bent uniformly.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment, a configuration is also conceivable in which the edge of the two blades or the edge of all the blades does not contact the edge guard 5. As shown in FIG. 19, the blade edge guard 8 of the embodiment has a bent portion in a substantially crank shape so as to conform to the state of the blade edge of the stacked blade bodies.

The cutting edge guard 8 extending on the upper surface of the cutting edge of the upper blade 8 bends obliquely downward slightly ahead of the cutting edge 13 of the upper blade to form a first outwardly bent portion 20. I have. As a result, there is a gap between the blade edge 13 of the upper blade body and the blade guard 5, so that they do not contact each other. The edge guard 5 bent in the longitudinal direction at the first outward bent portion 20 is bent inward at a position in contact with the upper surface of the middle blade body 9 to form the first inward bent portion 21. .

The cutting edge guard 5 is bent so as to be substantially horizontal by the first inward bent portion 21, bends obliquely downward beyond the cutting edge 19 of the middle blade body, and has a second outward bent portion 22.
Is formed. As a result, there is a gap between the blade edge 19 of the middle blade body and the blade guard 5, so that they do not contact each other. The edge guard 55 bent in the vertical direction at the outward second bent portion 22 is:
It is bent inward at a position in contact with the upper surface of the lower blade body 10 to form an inward second bent portion 23.

The blade edge guard 5 extending forward from the second inwardly bent portion 23 is bent so as to be wound around in contact with the blade edge 14 of the lower blade body, and the lower surface of the lower blade body 10 and the blade base 1 are joined together. Extend between.

In order to prevent the edges of the two blades from coming into contact with the blade guard 5, the blade guard 5 extending on the upper surface of the upper blade 8 is used as the blade edge of the upper blade. Instead of being bent along the edge 13, it is extended horizontally to the tip of the cutting edge 13 of the upper blade, and is bent obliquely downward at an interval from the cutting edge 13 of the upper blade.

Further, the edge guard 5 extending to the lower surface of the edge of the lower blade body 10 does not bend while being in contact with the edge edge 14 of the lower blade body, but instead is bent toward the tip of the edge edge 14 of the lower blade body. To bend, the blade edge 14 of the lower blade body and the blade guard 5
Are not in contact with each other, it is possible to prevent the blade edge 14 of the lower blade body from being damaged by the left and right movement of the blade guard 5. As a result, the cutting edges of all three blades do not contact the cutting edge guard.

As described above, in order to prevent the cutting edge guard 5 from contacting the cutting edges of the two cutting bodies or the cutting edges of the three cutting bodies, each cutting edge guard must be embodied in the present invention. Must be bent more elaborately and evenly than the one shown in the form. The present invention is a configuration suitable for forming such an extremely sophisticated edge guard,
The width of all the edge guards 5 is the same, and
Blade is more compact than conventional products,
The error can be extremely reduced by bending the rod 5 precisely and uniformly. The present invention can exert a more remarkable effect when forming a blade edge guard having a precise structure as in this embodiment.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a front view of the present invention with a top plate removed.

FIG. 3 is a sectional view of the present invention.

FIG. 4 is a front view of a guard plate.

FIG. 5 is a front view of a conventional guard plate.

FIG. 6 is a comparison diagram of the guard plate of the present invention and a conventional product.

FIG. 7 is a front view of a lower blade used in the present invention.

FIG. 8 is a front view of a conventional lower blade body.

FIG. 9 is a comparison diagram of the lower blade of FIGS. 7 and 8;

FIG. 10 is a front view of a lower spacer used in the present invention.

FIG. 11 is a front view of a conventional lower spacer.

FIG. 12 is a comparison diagram of the spacers of FIGS. 10 and 11;

FIG. 13 is a front view of an upper spacer used in the present invention.

FIG. 14 is a front view of a conventional upper spacer.

FIG. 15 is a comparison diagram of the upper spacers of FIGS. 13 and 14;

FIG. 16 is a front view of a blade base used in the present invention.

FIG. 17 is a front view of a conventional blade base.

FIG. 18 is a comparison diagram of the blade rest shown in FIGS. 16 and 17;

FIG. 19 is a sectional view of another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Blade base 2 Top plate 3 Guard plate 4 Hole
5 Blade Edge Guard 5a Both Edge Blade Edge Guard 6 Side End 7 Fitting Projection
7a Both ends fitting projection 8 Upper blade body 9 Middle blade body 10 Lower blade body 11
Upper spacer 12 Lower spacer 13 Cutting edge of upper blade 14 Cutting edge of lower blade 15 Upper half of guard plate 16 Lower half of guard plate 17 Round hole 1
8 Concave portion 19 Blade edge of middle blade 20 Outward first bent portion
21 Inward first bend 22 Outward second bend
23 Inwardly-facing second bent portion 24 Spacer recess
25 Mustache discharge hole 26 Mustache discharge hole
27 Extruded part 28 Mustache waste hole 29
Insertion hole 30 Insertion hole

Claims (2)

(57) [Claims] A blade member is sandwiched between a blade base (1) and a top plate (2), and side end portions (6, 6) extending forward from both ends of the top plate (2) are formed of the blade member. Both edges are pressed down, and a blade guard (5) covers the blade edge of the blade member. The blade guard (5) has a plurality of holes (4) in one guard plate (3). In a safety razor formed side by side, there are at least four cutting edge guards, and all the cutting edge guards are formed to be narrow with substantially the same width.
The two end edge guards (5a, 5a,
5a) are the side edges (6, 6) adjacent to the side, respectively.
6) at a distance from the cutting edge guards (5).
There is no other part of the guard plate (3) outside of the upper plate (a, 5a), and four fitting projections (7) are integrally provided on the back surface of the top plate (2). The guard plate (3) is provided with two insertion portions for inserting two fitting projections (7, 7) from the center, and both end fitting projections (7) existing at both ends are provided.
a, 7a) is a safety razor characterized by passing outside the guard plate (3). 2. The safety razor according to claim 1, wherein the guard plate is wound around the cutting edge by folding the guard plate into two so as to sandwich the cutting edge of the cutting member.