JP3124263B2 - 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 razor, and more particularly to a razor in which a blade extends in a longitudinal direction of a handle.

[0002]

2. Description of the Related Art A replaceable or disposable razor has a blade body extending at right angles to the longitudinal direction of the handle to form a T-shape (a so-called safety razor) and a blade body having a longitudinal axis. (For example, a razor for barber business, a razor for beauty for shaving female eyebrows, etc.).

[0003] Such a razor blade is usually fixed to a razor handle or a blade cartridge body. Japanese Patent No. 2653661, JP-A-57-148
In the safety razor described in Japanese Patent No. 979, etc., in order to improve the adaptability of the blade to shaving skin, the blade can automatically move relative to the blade cartridge body in accordance with the shaving pressure applied to the blade. However, in these safety razors, the direction of movement of the blade relative to the blade cartridge body is substantially perpendicular to the plane of the blade.

[0004] In the safety razor described in Japanese Patent Publication No. 7-102260, when the blade body slides sideways with respect to the shaving skin surface, that is, in order to prevent the skin from being cut when sliding in the blade edge direction, A skid sensor, which is pivotally provided on the blade cartridge and comes into contact with the skin, pivots according to the skid of the blade body, and the blade body retreats relatively to the blade cartridge in conjunction with the pivoting of the skid sensor. . The retraction movement of the blade body is performed in the plane of the blade body, but its direction is limited to parallel movement in a direction perpendicular to the blade edge.

[0005]

A razor in which the blade extends in the longitudinal direction of the handle is conventionally provided with a razor body (handle).
, The dissatisfaction with the adaptability of the blade to the skin and the skewness.

An object of the present invention is to provide a razor in which the blade extends in the longitudinal direction of the handle, so that the blade does not change the angle of the handle when the blade hits the skin, and the pressure applied to the blade from the shaving skin surface is reduced. In response, the blade automatically retracts and turns within the plane of the blade within the limits set for the handle, the force applied to the skin of the blade is reduced, and the angle adjustment between the blade and the handle is automatically adjusted. It is an object of the present invention to provide a movable blade structure that can be used to obtain a soft warpage.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a razor of the type in which the blade extends in the longitudinal direction of the handle, the blade being responsive to the shaving pressure, the blade being in its plane against an elastic biasing force. A razor body which is displaceable with respect to the main body and comprises, for example, a handle and a blade holding portion integrally extending from the tip of the handle in the longitudinal direction of the handle, and the blade holding portion is inserted from the tip of the blade holding portion. A blade holding piece member that covers the back and one side surface of the blade holding section, and a blade body held between the blade holding section and the blade holding piece member. A plurality of blade body holding projections protruding from the blade holding surface are formed to be arranged in the blade body longitudinal direction, and the blade body has a through hole that fits with a play gap corresponding to the blade body holding projection, Elastic biasing force between the blade holding portion of the razor body and the blade body An elastic member is provided, and the blade body is normally biased to a protruding position regulated by the blade body holding projection and the through hole of the blade body, but responds to the shaving pressure when receiving the shaving pressure. The razor is provided such that its relative position with respect to the razor body is displaced against the elastic biasing force of the elastic member within a play space between the blade body holding projection and the through hole of the blade body.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a barber razor,
In addition, the present invention can be widely applied to a replaceable blade type or a disposable type razor in which the blade body extends in the longitudinal direction of the handle. An example of a razor for eyebrows for women will be described.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The razor of the illustrated embodiment is a simple and inexpensive razor for women's eyebrows which is composed of four members and is suitable for disposable use. Its basic structure is disclosed in JP-A-8-84871 or 8-332288. This is similar to the structure disclosed in Japanese Unexamined Patent Publication.

The razor body 1 is a plastic member in which an elongated handle 2 to be gripped by hand and a blade holding portion 3 extending from the tip thereof in the longitudinal direction of the razor body are integrally formed. A part of the outer surface of the handle 2 may be integrally covered with a tubular plastic or rubber covering member 4 which has both decoration and improved gripping comfort.

A blade holding piece member 5 is put on the blade holding portion 3 of the razor body 1 by sliding in a longitudinal direction from the tip of the blade holding portion 3 in a sheath shape of a knife. The blade body 6 is a single blade, and the guard 6 can be integrally attached to the blade edge 6a. The guard 7 is preferably formed by forming a series of long holes 7a having a width of about 0.8 mm on the center line in the longitudinal direction of a rectangular thin metal film and forming a series of narrow strips 7b having a width of about 0.3 mm. The guard 7 is folded in two on the center line in the longitudinal direction and is joined to the blade body so that the fold is aligned with the blade edge 6a and covers the blade edge 7. Therefore, the strips 7b of the guard 7 are arranged at intervals of about 0.8 mm in the longitudinal direction of the blade edge across the blade edge 6a, and intermittently cover the blade edge 6a by about 0.3 mm.

The razor body 1 includes an inner surface 3 of the blade holding portion 3.
a forms a blade-clamping surface, and a longitudinal ridge 3b is formed on a back portion (a portion of the blade body 6 sandwiched opposite to the blade edge 6a), and an outer surface 3c of the blade-clamping portion 3 is formed. A groove 3d is formed on the back of the groove 3d in parallel with the ridge 3b, and the tip of the groove 3d is opened by slightly expanding a side surface on one side. Since the front end portion of the opening is widened, insertion for mounting the blade holding piece member 5 to the blade holding portion 3 becomes easy.

A razor body 1 is provided on the back of the blade holding piece member 5.
A sheath 5a having a U-shaped cross section is formed so as to cover the back of the blade holding portion 3 of FIG. Blade holding portion 5b extending from one end of the U-shaped cross section of sheath 5a of blade holding piece member 5
Has an inner side surface which forms a blade holding surface for holding the blade body 6 in opposition to the blade holding surface of the blade holding portion 3 of the razor body 1.

The blade holding piece member 5 has a longitudinal groove 5c formed on the inner surface of the sheath 5a facing the ridge 3b of the razor body 1 and the inner surface 5b following the ridge 3b, and the ridge 3b of the razor body is formed. Accept. On the inner surface of the sheath 5a facing the groove 3d of the razor body 1, a longitudinal ridge 5d is provided.
Are formed. The rim of the portion of the sheath portion 5a facing the outer side surface 3c of the blade holding portion 3 of the razor body 1 is formed by a ridge 5d.

The side face of the groove 3d of the razor body 1 and the side face of the edge of the ridge 5d of the sheath part 5a opposed thereto are complementary to each other when the blade holding piece member 5 is mounted on the razor body 1. Locking projections 3e and locking recesses 5e are formed respectively. The width of the groove 3d and the width of the protruding ridge 5d are aligned with a gap such that the sliding in the longitudinal direction is smoothly performed. However, in the vicinity of the locking projection 3e, the locking recess 5e can climb over the locking projection 3e. , Ridges 5d are omitted. On both sides in the longitudinal direction of the locking projection 3e and the locking recess 5e, an inclined surface or an inclined surface having an appropriate angle with respect to the side surface of the groove 3d and the side surface of the protruding ridge 5d so as to exhibit mutual smoothness and appropriate locking force. Each has a curved surface.

The blade body 6 has two through holes 6b spaced apart in the longitudinal direction on the back portion opposite to the blade edge 6a, and the inner surface 3a of the blade holding portion 3 of the razor body 1 has a replacement. A blade holding projection 3f is formed at a position corresponding to the through hole 6b of the blade 6, and the blade holding projection 3f passes through the through hole 6b of the blade 6. The through hole 6 b has a long side of about 2.5 having a long side in the longitudinal direction of the blade body 6.
The short side of the rectangle is slightly curved to form an outwardly convex arc, and the corners of the rectangle are rounded. The cross section of the projection 3f also has a shape similar to that of the through hole 6b. However, the length of the short side of the rectangular cross section of the blade body holding projection 3f is about 1 mm, which is approximately 1/2 of the length of the short side of the through hole 6b. The projection 3f and the through hole 6b have a relatively large play space in a direction perpendicular to the blade edge 6a of the blade body 6, and the length of the long side is about 2.3 mm, and It also has some play in the longitudinal direction.

The through-hole 6b of the blade 6 is fitted into the blade holding projection 3f, and the blade 6 is placed on the inner side surface 3a of the blade holding portion 3 of the razor body 1, opposite to the blade edge 7 of the through-hole 6a. When the long side of the razor body 1 is placed at a position where the long side of the razor body comes into contact with the blade holding projection 3f (hereinafter referred to as a “projection position”), the ridge 3b and the groove 3
d and the grooves 5c and the ridges 5d of the blade holding piece member 5 fitted thereto extend substantially parallel to the blade edge 6a.

The inner surface 3a of the blade holding portion 3 of the razor body 1
Has an elongated rectangular recess 3g at a position along the edge of the back (opposite the blade edge) of the mounted blade body 6. The long side of the concave portion 3g extends substantially parallel to the blade edge 6a of the blade body 6 placed at the protruding position, and the concave portion 3g has a portion on the blade body 6 side of the width overlapping the back portion of the blade body 6, and The remaining portion of the width is located off the blade body 6 on the opposite side of the blade edge 7 of the blade body 6, and the long side of the recess 3g opposite to the blade body 6 is opposite to the blade body 6 of the ridge 3b. Is aligned with or closer to the blade body 6 than the side wall surface.

In the recess 3g, an elastic member 8 that generates an elastic biasing force between the back edge of the blade body 6 and the long side wall of the recess 3g on the opposite side is about 12 mm long and about 1.10 mm wide. 5mm,
An arcuate leaf spring having a thickness of about 0.1 mm is arranged, and a central convex portion of the leaf spring elastically contacts the back edge of the blade body 6, and both ends of the leaf spring are located on the back edge of the blade body 6 in the concave portion 3 g. It is in elastic contact with the long side wall on the opposite side. At this time, the leaf spring is elastically slightly compressed, and the blade body 6 is elastically biased to the above-mentioned normal "projecting position".

Although a leaf spring is used as the elastic member 8 in the illustrated embodiment, a block made of rubber or an elastomer can be used as the elastic member 8. The razor of the embodiment described above has a simple structure composed of four members, and is extremely easy and easy to assemble and disassemble.

That is, first, the blade holding portion 3 of the razor body 1
The blade body 6 is mounted on the inner side surface 3a by fitting its two through holes 6b to the corresponding one of the two blade body holding projections 3f projecting from the inner side 3a of the razor body 1. Next, the elastic member 8 is inserted into the concave portion 3g of the inner side surface 3a of the blade holding portion 3.
The concave projection 3g is positioned with the curved projection at the center thereof on the blade body 6 side.
Of the blade body 6 and the back edge of the blade body 6. Finally, the razor body 1 is inserted into the blade holding piece member 5 together with the blade body 6 and the elastic member 8 from the tip of the razor body 1 so that the knife is inserted into the sheath. At this time, the protrusion 3b and the groove 3d of the razor body 1 are aligned with the groove 5c and the protrusion 5d of the blade holding piece member 5 in the longitudinal direction, respectively. In addition,
The groove 5c of the blade holding piece member 5 has a width sufficient to align with the corresponding ridge 3b of the razor body 1 and not to interfere with the blade holding projection 3f and the elastic member 8.

In order to replace the blade 6, the blade 6 is disassembled in a procedure reverse to the above-described assembling procedure. When using a razor, some shaving pressure is applied to the blade edge 7 of the blade body 6. The elastic member 8 is elastically deformed according to the magnitude and direction of the shaving pressure, and the spare blade 6 has a play gap between its through hole 6a and the blade body holding projection 3f of the blade holding portion 3 of the razor body 1. The relative position is moved within the plane of the blade body 6 with respect to the razor body 1 within an allowable range. This movement is caused by the parallel retreat of the blade body 6 in the direction perpendicular to the blade edge 7 at the aforementioned “projection position” (up to about 1 m).
m), but also the rotation with respect to the razor body 1, ie,
A change in the edge angle may also occur.

When the shaving pressure is removed, the blade body 6 returns to the normal “projecting position” by the elastic restoring force of the elastic member 8. In order to ensure smooth sliding of the blade body 6 with respect to the razor body 1, the thickness of the blade body 6 to be clamped, the inner surface 3a of the blade clamping portion 3 of the razor body 1 and the inner surface of the blade clamping piece member 5 are set. It is preferable to secure a small play gap between the blade 5b and the gap holding the blade 6 therebetween. For this reason, a step (3h in the illustrated embodiment) slightly protruding from one or both of the inner surface 3a of the blade holding portion 3 and the inner surface 5b of the blade holding piece member 5 from these inner surfaces interferes with the blade body 6. It is formed in the position where it does not.

[0024]

According to the razor of the present invention, since the blade body is automatically parallel and pivotally displaced in the plane of the blade body in accordance with the shaving pressure at the relative position with respect to the razor body, the blade is smooth on the skin surface. The softness of the blade is reduced and the softness is obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a disposable female replaceable razor according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a blade holding portion and a built-in elastic member of the razor main body of the razor of FIG. 1 and an enlarged side view of the blade holding piece member, and shows an assembled state of the blade holding piece member and the blade body. Shown by lines.

FIG. 3 is an enlarged side view of the blade holding portion and the blade holding piece member of the razor main body of FIG. 1 on the opposite side of FIG. 2;

4A is a sectional view taken along line AA of FIG. 3, and FIG. 4B is a sectional view taken along line BB of FIG.

FIG. 5 is a side view of a blade used in the razor of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Razor main body 2 Handle 3 Blade holding portion 3b Protrusion 3d groove 3e Locking projection 3f Blade holding protrusion 3g Depression 3h Step 4 Coating member 5 Blade holding piece member 5a Sheath portion 5b Blade holding portion 5c Groove 5d Protrusion 5e Stop recess 6 Blade body 6a Blade edge 6b Through hole 7 Guard 8 Elastic member

Claims (11)

(57) [Claims] 1. A razor body 1 comprising a handle 2 and a blade holding portion 3 integrally extending from a tip of the handle in a longitudinal direction of the handle, and the blade holding portion 3 being inserted from a tip of the blade holding portion. A blade holding member 5 covering the back and one side surface of the blade holding portion; and a blade body 6 held between the blade holding portion 3 and the blade holding member 5. A plurality of blade body holding projections 3f projecting from the blade holding surface are formed in the blade holding section 3 and are arranged in the longitudinal direction of the blade body. The blade body 6 fits with a play gap corresponding to the blade body holding projection 3f. A resilient member 8 having a through hole 6b to be engaged and generating an elastic biasing force between the blade holding portion 3 of the razor body 1 and the blade body 6 is provided. It is biased to the protruding position regulated by the holding projection 3f and the through hole 6b of the blade body. However, when receiving the shaving pressure, the relative position of the resilient member 8 with respect to the razor body is set within a play gap between the blade holding projection 3f and the through hole 6b of the blade. Razor displaced in the plane of the blade body against the elastic biasing force of 2. The razor according to claim 1, wherein said razor body and said blade holding member are plastic molded members. 3. The razor according to claim 2, wherein a part of the handle 2 of the razor body is integrally coated with a plastic or rubber covering member 4. 4. The blade holding piece member 5 has a sheath portion 5a having a U-shaped cross section straddling the back of the blade holding portion 3 of the razor body 1, and a blade holding portion extending from one end of the U-shaped cross section of the sheath portion. 5. The razor according to claim 1, wherein the blade body 6 is held between the blade holding portion 5 b of the blade holding piece member 5 and the blade holding portion 3 of the razor body. 5. The blade holding portion 3 and the blade holding piece member 5 of the razor main body are formed with grooves 3d, 5c and projections 3b, 5d which extend in the blade body longitudinal direction and are fitted to each other. The razor according to claim 4, wherein 6. The elastic member 8 is formed of a plate spring curved in an arc shape, and a concave portion 3g extending in the blade body longitudinal direction is formed on a blade holding surface of the blade holding portion 3 of the razor body 1, and the elastic member 8 is provided. The elastic member 8 is arranged such that the curved convex portion at the center of the elastic member 8 abuts on the back edge of the blade body 6 and both ends of the elastic member 8 abut on the side wall of the concave portion 3g on the side opposite to the blade body. A razor according to claim 5. 7. The groove 5c formed in the blade holding piece member 5 is aligned with the ridge 3b formed in the blade holding portion 3 of the razor body 1, and the elastic member 8 and the blade body holding protrusion are provided. 7. A razor according to claim 6, having a width sufficient to not interfere with 3f. 8. The groove 3d of the blade holding portion 3 of the razor body and the protruding ridge 5d of the blade holding portion piece member 5 fitted in the groove engage with each other to lock relative movement in the longitudinal direction. 6. The razor according to claim 5, wherein the locking projection 3e and the locking recess 5e having complementary shapes are formed. 9. The blade body 6 includes a guard 7 that covers the blade edge 6a.
A razor according to claim 1, comprising: 10. The blade body holding projection 3 of the razor body 1
f and the through hole 6b of the blade body 6 each have a long side extending in the longitudinal direction of the blade body, and have a substantially rectangular shape. The rectangular corner is rounded, and the short side of the through hole 6 is short. Is curved outwardly convex, and the play gap between the cross section of the blade body holding projection 3f and the through hole 6b of the blade body is such that the play gap in the short side direction of the rectangle is larger than the play gap in the long side direction, The razor according to claim 1, wherein the blade body (6) is parallel and pivotally displaceable within the play gap within a blade body plane relative to the razor body (1). 11. The blade holding surface of the blade holding portion 3 of the razor main body 1 and the blade holding piece member 5 contacting the blade holding surface.
The razor according to claim 4, wherein a stepped portion (3h) for securing a gap for ensuring smooth sliding of the blade body (6) is formed on one or both of the blade holding surfaces of the blade holding portion (5b).